阅读说明：本技术 一种超高层建筑核心筒塔吊高空转换体系及其施工方法 (High-altitude conversion system of core tube tower crane of super high-rise building and construction method thereof ) 是由 周予启 刘卫未 王晶 李静 范昕 车庭枢 蒋千重 车辕 于 2021-06-17 设计创作，主要内容包括：本发明公开了一种超高层建筑核心筒塔吊高空转换体系及其施工方法,转换体系包含核心筒及对应主体结构、连接于核心筒内部的塔吊内爬基础基座、连接于核心筒上方的转换临时结构、连接于转换临时结构上的夹持组件、连接于转换临时结构底部且位于核心筒上方的转换基础。本发明通过在核心筒筒顶再次设置转换基础的方式,保证了核心筒上部结构的进一步安装和塔吊的承力；通过转换临时结构的设置,利于在塔吊节转换底部基础时,先行在上方进行临时固定,保证下部的施工；通过夹持组件和转换基础底座的设置,既可以保证转换过程中塔吊节的固定,又可以保证利用下部核心筒结构保证转换临时结构的支撑,同时保证了下部核心筒内其他工序施工提前插入。(The invention discloses a high-altitude conversion system of a core tube tower crane of a super high-rise building and a construction method thereof. The mode of setting the conversion foundation on the top of the core tube again ensures further installation of the upper structure of the core tube and bearing force of the tower crane; through the arrangement of the temporary conversion structure, when the tower crane section converts the bottom foundation, temporary fixation is performed on the upper part in advance, and the construction of the lower part is ensured; through the setting of centre gripping subassembly and conversion basic base, both can guarantee the fixed of tower crane festival in the conversion process, can guarantee to utilize lower part core section of thick bamboo structure to guarantee the support of conversion temporary structure again, guaranteed simultaneously that other processes construction in the lower part core section of thick bamboo insert in advance.)

1. A super high-rise building core tube tower crane high idling exchange system is characterized by comprising a core tube (1) and a corresponding main body structure, a core tube shear wall (2) connected above the top of the core tube (1), a tower crane inner climbing foundation base (3) connected inside the core tube (1), a conversion temporary structure (9) connected above the core tube (1), a clamping assembly (6) connected on the conversion temporary structure (9) and the core tube shear wall (2), a conversion foundation (5) located at the bottom of the conversion temporary structure (9) and connected above a core tube top plate (8), and a tower crane section (4) connected above the conversion foundation (5);

the conversion temporary structure (9) comprises auxiliary frame vertical rods (91) connected with the core tube shear wall (2) and the peripheral structural columns (10), auxiliary frame horizontal rods (93) connected to the auxiliary frame vertical rods (91) in the horizontal direction at intervals, auxiliary frame inclined supports (92) connected between the structural columns (10) and the bearing clamp beams (61) or between the structural columns (10) and the auxiliary frame horizontal rods (93) at intervals, and auxiliary frame bearing rods (94) connected with the auxiliary vertical rods (91) on the temporary tower crane fixing floor; the auxiliary vertical rod (91), the auxiliary frame horizontal rod (93) and the auxiliary frame bearing rod (94) form a frame body and are connected with the tower crane section (4) through the clamping assembly (6);

the clamping assembly (6) comprises clamping rods (62) which are connected with the periphery of the tower crane section (4) and are horizontally arranged, and a bearing clamping beam (61) which is connected between the core barrel shear wall (2) and the auxiliary frame bearing rod (94), wherein the bearing clamping beam (61) is temporarily detachably connected with the bottom of the tower crane section (4); the end of the clamping rod (62) is connected with the structure column (10) and/or the conversion temporary structure (9);

the conversion foundation (5) comprises a rotating foundation upright post (54) which is arranged in a square shape, two rotating foundation bearing beams (53) which are connected to the tops of the rotating foundation upright posts (54) and arranged in parallel, and a rotating foundation reinforcing support (56) which is connected between the two rotating foundation bearing beams (53), wherein the rotating foundation upright post (54) is connected with a conversion support beam (51) in the core barrel top plate (8) through a conversion foundation base (52); the rotating base bearing beam (53) is correspondingly connected with a tower crane section base, a tower crane section (4) is installed on the upper portion of the tower crane section base, and the top of the tower crane section (4) is connected with a hoisting mechanism.

2. The super high-rise building core tube tower crane high-idle conversion system as claimed in claim 1, characterized in that the lower part of the conversion supporting beam (51) is further connected with a structural reinforcement inclined strut (55), and the lower part of the structural reinforcement inclined strut (55) is fixedly connected with the core tube (1).

3. The super high-rise building core tube tower crane high-idling system as claimed in claim 1, wherein the bearing clamp beam (61) is a double H-shaped member formed by two parallel cross bars vertically connected to the middle of two parallel beams, and the two parallel beams are both connected between the auxiliary frame bearing bar (94) and the core tube shear wall (2).

4. The high-idle exchange system of the core tube tower crane of the super high-rise building as claimed in claim 3, characterized in that both ends of the auxiliary frame bearing rod (94) are connected between the two auxiliary frame vertical rods (91) at the opposite side of the core tube shear wall (2); the auxiliary frame horizontal rods (93) comprise auxiliary frame horizontal cross rods (931) horizontally connected between two auxiliary frame vertical rods (91) on the opposite side of the core barrel shear wall (2) and auxiliary frame horizontal inclined rods (932) connected between the structural column body (10) and the auxiliary vertical rods (91) and between the core barrel shear wall (2) and the structural column body (10); horizontal down tube (932) of auxiliary frame sets up at the vertical interval of supplementary vertical pole (91).

5. The high idle system of trading of super high-rise building core section of thick bamboo tower crane of claim 1, characterized in that, tower crane inside climb basis base (3) can dismantle the both sides shear force wall of connecting in the inside of a core section of thick bamboo (1), tower crane inside climb basis base (3) contain mouth font or H type inside climb supporting beam (31), connect in climb basis (31) all around and with core section of thick bamboo (1) connected inside climb bracing (32) and inside climb horizontal support (33) of parallel arrangement below the basis.

6. The high-idle conversion system of the core tube tower crane of the super high-rise building as claimed in claim 1, characterized in that the clamping rods (62) are arranged at intervals on the conversion temporary structure (9), and the clamping rods (62) are respectively fixed with the tower crane sections (4), the auxiliary frame bearing rods (94) and the core tube shear wall (2).

7. The construction method of the core tube tower crane high-altitude conversion system of the super high-rise building according to any one of claims 1 to 6, characterized by comprising the following specific steps:

step one, installing embedded parts

When the main structure is constructed, the embedded part (11) is installed and fixed at the axis and the elevation of the design label in advance;

step two, installing and converting the temporary structure

1) Constructing the Nth layer of the core barrel (1) and the main structure, after the transformation of the creeping formwork (7) of the core barrel (1) is completed, climbing the creeping formwork (7) to the N +1 layer, and then installing a conversion temporary structure (9);

2) when the bearing clamping beams (61) of the N +1 layer and the N +4 layer are installed, the section of the core cylinder (1) is reduced, the concrete wall is contracted inwards, the embedded part (11) cannot be fixed, and the installation and conversion temporary structure (9) is used for supporting the installation of the bearing clamping beams (61); the conversion temporary structure (9) is connected with the top plate (8) of the core barrel, wherein the bottom of the conversion supporting beam (51) is made into a triangular support through a structure reinforcing inclined strut (55) to ensure that the conversion supporting beam cannot deform under pressure;

3) when the temporary structure (9) is installed and converted, the temporary structure is installed twice, an auxiliary frame vertical rod (91) is installed firstly, other components such as the auxiliary frame vertical rod (91), an auxiliary frame horizontal rod (93), an auxiliary frame inclined support (92) and an auxiliary frame bearing rod (94) are installed after fixing is completed, welding is uniformly carried out after verticality correction is completed, and then installation and welding of the next section of auxiliary frame vertical rod (91), the auxiliary frame horizontal rod (93), the auxiliary frame inclined support (92) and the auxiliary frame bearing rod (94) are carried out;

step three, installing a clamping assembly

Installing bearing clamping beams (61) and clamping rods (62) of a tower crane section (4) which are arranged on the (N + 1) th layer and the upper part at intervals, wherein N is an integer greater than 1; sequentially mounting from bottom to top;

step four, climbing tower crane

The tower crane internal climbing foundation base (3) is left in the core tube (1), the tower crane is further climbed through an internal climbing device, before the Nth layer of conversion foundation (5) is installed, the tower crane needs to climb to the (N + 1) th layer, and the tower crane section (4) is temporarily installed on the bearing clamp beam (61) on the (N + 1) th layer through a climbing frame;

the bearing clamp beam (61) is a double H-shaped piece formed by vertically connecting two parallel cross rods to the middle parts of two parallel beams to form a square, and the two parallel beams are connected between the auxiliary frame bearing rod (94) and the core tube shear wall (2);

step five, construction conversion foundation

Completing installation, clamping and fixing of a temporary conversion structure (9) for climbing of the tower crane section (4), and completing construction of a conversion foundation (5) with N layers; the conversion foundation (5) comprises a conversion foundation base (52), a square-arranged foundation transfer column (54), two foundation transfer bearing beams (53) connected to the tops of the foundation transfer column (54) in parallel and a foundation transfer reinforcing support (56) connected between the two foundation transfer bearing beams (53); the foundation-rotating upright column (54) is connected with a conversion supporting beam (51) in the core barrel top plate (8) through a conversion foundation base (52);

step six, tower crane fall-back conversion foundation

After the construction of the conversion foundation (5) is finished, the tower crane section base falls back to the Nth layer to complete the connection foundation conversion;

seventhly, installing wall-attached pull rods and jacking sleeve frame

When the tower crane section (4) reaches a specified height, installing a wall-attached pull rod and a tower crane jacking sleeve frame at the upper part of the tower crane section (4);

step eight, dismantling the clamping assembly and converting the temporary structure

And (3) removing the clamping assembly (6) and the temporary conversion structure (9) by using another tower crane in cooperation with the chain block chain, so as to complete the whole conversion of the tower crane foundation.

8. The construction method of the core tube tower crane high-altitude conversion system of the super high-rise building according to claim 7, wherein for the step one, after the binding of the core tube (1) and the main structure steel bars is completed, and before the closing of the concrete template, the embedded part (11) is fixed at the marked axis and elevation of the design drawing by spot welding, and the deviation is not more than 5 mm; measuring the positioning data again after the template reinforcement is finished, and adjusting immediately if the deviation is more than 5 mm;

an embedded part (11) is embedded in the core tube shear wall (2) at the position of 1.5-1.8 m above the bearing clamping beam (61) and is used for converting a temporary structure (9) and fixing points of a manual hoist during installation of the clamping assembly (6).

9. The construction method of the high-altitude conversion system of the core tube tower crane of the super high-rise building according to claim 8, characterized in that in the fifth step, when the conversion foundation (5) of the Nth floor is installed, the lower part of the lowest inner climbing support beam is transported to the Nth floor, the Nth floor is provided with the conversion foundation (5) in a erecting way, and the center distance of the conversion foundation (5) is ensured to be matched with the center distance of the main limb of the tower crane section (4); connecting the lower part of an inner climbing foundation section in a tower crane section (4) with a detachable foundation of the tower crane, directly dropping the detachable foundation in the tower crane section (4) above a newly erected conversion foundation (5), adjusting the verticality of the tower crane to meet the requirement, clamping a jacking bolt of an inner climbing frame, and welding the detachable foundation with the newly erected conversion foundation (5);

wherein, install stress sensor and strain sensor at conversion basis (5) bottom, the change of real time monitoring stress and displacement to be connected with controlling means and be used for the early warning after setting for the limit threshold value.

10. The construction method of the high-altitude conversion system of the core tube tower crane of the super high-rise building as claimed in claim 9, wherein for step seven, the tower crane jacking sleeve frame is installed after the tower crane joint base is rooted again on the conversion foundation (5); jacking sleeve frames are mutually installed through adjacent tower cranes, and meanwhile, the jacking sleeve frames need to be matched by virtue of chain blocks; when the jacking sleeve frame is installed, the opening direction of the jacking sleeve frame, namely the introduction direction of the standard knot, is determined according to the jacking step direction of the tower crane on site.

Technical Field

The invention belongs to the technical field of tower crane construction, and particularly relates to a core tube tower crane high-altitude conversion system for a super high-rise building and a construction method thereof.

Background

With the rapid development of domestic super high-rise buildings, the tower crane used as the most important vertical transportation tool in the construction of the super high-rise buildings has increasingly mature use technology, and the tower crane foundation is a member for installing and fixing the tower crane, ensuring the normal use of the tower crane and transferring various actions of the tower crane to a stressed structure. In the construction of super high-rise buildings, a construction organization mode that a core cylinder is firstly adopted and an outer frame is followed is generally adopted. And climbing in the tower crane is used as a safe and economical fixed climbing mode of the tower crane, and is widely applied to super high-rise building construction. Due to the influence of the structural layout, the condition that the wall of the core tube shrinks is often met, and the tower crane is ensured to climb upwards by adopting a mode of tower crane foundation conversion. Generally, an external hanging foundation is preferentially selected when a super high-rise project meets the condition of tower crane foundation conversion, and due to the special arrangement of a core tube structure, a more economic and safe conversion mode needs to be considered to realize the smooth climbing of the tower crane due to the reasons of high installation difficulty, long construction period, poor technical economy, interference with climbing formwork and the like of the external hanging foundation.

Disclosure of Invention

The invention provides a core tube tower crane high-altitude conversion system for a super high-rise building and a construction method thereof, which are used for solving the technical problems of tube top conversion, temporary structure installation and fixation, support structure installation and construction and the like of an internal climbing tower crane in a high-altitude conversion climbing mode due to the change of core tube layout in a high-rise or super high-rise building.

In order to achieve the purpose, the invention adopts the following technical scheme:

a super high-rise building core tube tower-hung high-idling conversion system comprises a core tube, a corresponding main body structure, a core tube shear wall connected above the top of the core tube, a tower crane climbing-in foundation base connected inside the core tube, a conversion temporary structure connected above the core tube, a clamping assembly connected on the conversion temporary structure and the core tube shear wall, a conversion foundation located at the bottom of the conversion temporary structure and connected above a top plate of the core tube, and a tower crane section connected above the conversion foundation;

the temporary conversion structure comprises auxiliary frame vertical rods connected with the core cylinder shear wall and the surrounding structural cylinders, auxiliary frame horizontal rods connected to the auxiliary frame vertical rods in the horizontal direction at intervals, auxiliary frame inclined supports connected between the structural cylinders and the bearing clamp beams or between the structural cylinders and the auxiliary frame horizontal rods at intervals, and auxiliary frame bearing rods connected with the auxiliary vertical rods on the temporary fixed floor of the tower crane; the auxiliary vertical rod, the auxiliary frame horizontal rod and the auxiliary frame bearing rod form a frame body and are connected with the tower crane joint through the clamping assembly;

the clamping assembly comprises clamping rods which are connected with the periphery of the tower crane section and are horizontally arranged, and a bearing clamping beam which is connected between the core barrel shear wall and the auxiliary frame bearing rod, wherein the bearing clamping beam is temporarily detachably connected with the bottom of the tower crane section; the end part of the clamping rod is connected with the structural column and/or the conversion temporary structure;

the conversion foundation comprises a foundation transfer upright column arranged in a square shape, two foundation transfer bearing beams connected to the tops of the foundation transfer upright column and arranged in parallel, and a foundation transfer reinforcing support connected between the two foundation transfer bearing beams, wherein the foundation transfer upright column is connected with a conversion support beam in a top plate of the core barrel through a conversion foundation base; the foundation transfer spandrel girder corresponds connects the tower crane festival base, and tower crane festival base upper portion installation tower crane festival, tower crane festival top connection hoisting mechanism.

Furthermore, a structure reinforcing inclined strut is further connected to the lower portion of the conversion supporting beam, and the lower portion of the structure reinforcing inclined strut is fixedly connected with the core barrel.

Furthermore, the bearing clamping beam is a double H-shaped piece formed by vertically connecting two parallel cross rods to the middle parts of two parallel beams, and the two parallel beams are connected between the auxiliary frame bearing rod and the core tube shear wall.

Furthermore, two ends of the auxiliary frame bearing rod are connected between two auxiliary frame vertical rods on the opposite side of the core tube shear wall; the auxiliary frame horizontal rods comprise auxiliary frame horizontal cross rods horizontally connected between two auxiliary frame vertical rods on the opposite side of the core tube shear wall and auxiliary frame horizontal inclined rods connected between the structure column body and the auxiliary vertical rods and between the core tube shear wall and the structure column body; the horizontal inclined rods of the auxiliary frame are arranged at vertical intervals of the auxiliary vertical rod.

Further, climb in the tower crane foundation base and can dismantle the both sides shear force wall of connecting in a core section of thick bamboo inside, climb in the tower crane foundation base and contain the interior supporting beam that climbs of mouth font or H type, connect in climb in the basis all around and with the core section of thick bamboo be connected in climb the bracing and climb in the basis below parallel arrangement in and transversely support.

Furthermore, the clamping rods are arranged on the temporary conversion structure at intervals and are fixed with the tower crane section, the auxiliary frame bearing rod and the core cylinder shear wall respectively.

Further, the construction method of the core tube tower crane high-altitude conversion system of the super high-rise building comprises the following specific steps:

step one, installing embedded parts

When the main body structure is constructed, the embedded parts are installed and fixed at the axis and the elevation of the design and the marking in advance;

step two, installing and converting the temporary structure

1) After the core barrel and the main structure are constructed on the Nth layer, and the creeping formwork transformation of the core barrel is completed, the creeping formwork climbs to the N +1 layer, and then a conversion temporary structure is installed;

2) when the bearing clamping beams of the N +1 layer and the N +4 layer are installed, the section of the core cylinder is reduced, the concrete wall is contracted inwards, the embedded part cannot be fixed, and the installation conversion temporary structure is used for supporting the installation of the bearing clamping beams; the conversion temporary structure is connected with the top plate of the core barrel, and the bottom of the conversion supporting beam is made into a triangular support through a structural reinforcing inclined strut, so that the conversion temporary structure is prevented from being deformed under pressure;

3) when the temporary structure is installed and converted, the temporary structure is installed twice, the auxiliary frame vertical rod is installed firstly, other components such as the auxiliary frame vertical rod, the auxiliary frame horizontal rod, the auxiliary frame inclined support and the auxiliary frame bearing rod are installed after the fixing is completed, the welding is uniformly carried out after the verticality correction is completed, and then the installation and the welding of the next section of auxiliary frame vertical rod, the auxiliary frame horizontal rod, the auxiliary frame inclined support and the auxiliary frame bearing rod are carried out;

step three, installing a clamping assembly

Installing a tower crane section on the (N + 1) th layer and a bearing clamping beam and a clamping rod which are arranged at intervals on the upper part of the tower crane section, wherein N is an integer greater than 1; sequentially mounting from bottom to top;

step four, climbing tower crane

The tower crane inner climbing foundation base is left in the core tube, the tower crane is further climbed through the inner climbing device, before the Nth layer of conversion foundation is installed, the tower crane needs to climb to the (N + 1) th layer, and the tower crane section is temporarily installed on the bearing clamping beam on the (N + 1) th layer through the climbing frame;

the bearing clamp beam is a double H-shaped piece formed by vertically connecting two parallel cross rods to the middle parts of two parallel beams to form a square, and the two parallel beams are connected between the bearing rod of the auxiliary frame and the shear wall of the core barrel;

step five, construction conversion foundation

Completing installation, clamping and fixing of the tower crane section climbing conversion temporary structure, and completing construction of an N-layer conversion foundation; the conversion foundation comprises a conversion foundation base, a square foundation transfer column, two foundation transfer bearing beams which are connected to the top of the foundation transfer column and arranged in parallel, and a foundation transfer reinforcing support connected between the two foundation transfer bearing beams; the foundation-rotating upright column is connected with a conversion supporting beam in the top plate of the core barrel through a conversion foundation base;

step six, tower crane fall-back conversion foundation

After the construction of the converted foundation is finished, the tower crane section base falls back to the Nth layer to complete the connection foundation conversion;

seventhly, installing wall-attached pull rods and jacking sleeve frame

When the tower crane section reaches a specified height, installing a wall-attached pull rod and a tower crane jacking sleeve frame on the upper part of the tower crane section;

step eight, dismantling the clamping assembly and converting the temporary structure

And (4) another tower crane is utilized, and the hand chain block chain is matched to remove the clamping assembly and convert the temporary structure, so that the whole conversion of the tower crane foundation is completed.

Further, in the fifth step, when the conversion foundation on the Nth layer is installed, the lower part of the lowest-way inner climbing support beam is transported to the Nth layer, and the Nth layer is provided with the conversion foundation, so that the center distance of the conversion foundation is ensured to be adaptive to the center distance of the main limbs of the tower crane section; connecting the lower part of an inner climbing foundation section in a tower crane section with a detachable foundation of the tower crane, directly dropping the detachable foundation in the tower crane section above a newly erected conversion foundation, adjusting the verticality of the tower crane to meet the requirement, clamping a jacking bolt of an inner climbing frame, and welding the detachable foundation with the newly erected conversion foundation;

the stress sensor and the strain sensor are installed at the bottom of the conversion foundation, the changes of stress and displacement are monitored in real time, and the stress sensor and the strain sensor are connected with the control device for early warning after a limit threshold value is set.

Further, in the seventh step, after the tower crane joint base transforms the foundation to take root again, a tower crane jacking sleeve frame is installed; jacking sleeve frames are mutually installed through adjacent tower cranes, and meanwhile, the jacking sleeve frames need to be matched by virtue of chain blocks; when the jacking sleeve frame is installed, the opening direction of the jacking sleeve frame, namely the introduction direction of the standard knot, is determined according to the jacking step direction of the tower crane on site.

The invention has the beneficial effects that:

1) the mode of setting the conversion foundation on the top of the core tube again ensures further installation of the upper structure of the core tube and bearing force of the tower crane;

2) according to the invention, through the arrangement of the conversion temporary structure, when the tower crane section converts the bottom foundation, temporary fixation is firstly carried out on the upper part, so that the construction of the lower part is ensured;

3) according to the invention, through the arrangement of the clamping assembly and the conversion base, not only can the fixation of a tower crane section in the conversion process be ensured, but also the support of a conversion temporary structure can be ensured by utilizing a lower core tube structure;

in addition, the system designed by the invention has simple form, simple node design, small stress of the foundation support and small influence on creeping formwork; compared with a common externally hung foundation, the externally attached conversion foundation steel member has small section and small installation amount, and only needs one-time assembly and disassembly of the conversion member. The conversion foundation construction is not conflicted with the creeping formwork and steel structure construction, and the foundation construction saves labor force and construction period. The method can be widely applied to the selection and implementation of the tower crane foundation for the high-altitude conversion of the climbing mode of the tower crane due to the structural layout change of the climbing tower crane in the super high-rise building.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention; the primary objects and other advantages of the invention may be realized and attained by the instrumentalities particularly pointed out in the specification.

Drawings

FIG. 1 is a schematic construction diagram of a core tube tower crane high-idle conversion system of a super high-rise building;

FIG. 2 is a schematic view of connection of an inner climbing foundation support of a tower crane;

FIG. 3 is a schematic elevation view of a tower crane high altitude transition foundation of the present invention;

FIG. 4 is a schematic elevation view of a tower crane conversion temporary structure of the present invention;

FIG. 5 is a schematic plane view of an N layer of a tower crane conversion temporary structure of the invention;

FIG. 6 is a schematic plane view of an N +1 layer of the tower crane conversion temporary structure of the invention;

FIG. 7 is a schematic plane view of N + 2-N +3 layers of the tower crane conversion temporary structure;

FIG. 8 is a schematic plane view of an N +4 layer of the tower crane conversion temporary structure of the present invention;

FIG. 9 is a schematic elevation view of a tower crane conversion foundation of the present invention;

FIG. 10 is a schematic plan view of a tower crane conversion foundation of the present invention.

Reference numerals: 1-core cylinder, 2-core cylinder shear wall, 3-tower crane inner climbing foundation base, 31-inner climbing support beam, 32-inner climbing inclined strut, 33-inner climbing transverse support, 4-tower crane joint, 5-conversion foundation, 51-conversion support beam, 52-conversion foundation base, 53-base-rotating bearing beam, 54-base-rotating upright post, 55-structure reinforcing inclined strut, 56-base-rotating reinforcing strut, 6-clamping component, 61-bearing clamping beam, 62-clamping rod, 7-creeping formwork, 8-core cylinder top plate, 9-conversion temporary structure, 91-auxiliary frame vertical rod, 92-auxiliary frame inclined support, 93-auxiliary frame horizontal rod, 931-auxiliary frame horizontal cross rod, 932-auxiliary frame horizontal inclined rod, 94-auxiliary frame rod, 10-structural columns, 11-embedded parts.

Detailed Description

Taking a certain commercial building as an example, the main tower is 57 floors, the skirt house is 5 floors, and the building height of the main tower is 260 m. As shown in figure 1, during construction, internal climbing construction is adopted below an L25 layer, and as the tower crane needs to be lifted by an external mode at an L25 layer, the high-rise foundation of the tower crane is arranged on an L25 layer floor slab to ensure that the high-rise foundation of the tower crane can smoothly fall on an L25 layer in consideration of the fact that a formal elevator machine room of a low region of the project is positioned between an L23 layer and an L24 layer. Therefore, the high-altitude conversion system and the construction method thereof are applied to carry out high-altitude conversion so as to ensure normal construction.

As shown in fig. 1 to 10, the tower crane comprises a core tube 1 and a corresponding main structure, a core tube shear wall 2 connected above the top of the core tube 1, a tower crane climbing foundation base 3 connected inside the core tube 1, a conversion temporary structure 9 connected above the core tube 1, a clamping assembly 6 connected on the conversion temporary structure 9, a conversion foundation 5 located above the core tube 1, and a tower crane section connected above the conversion foundation 5.

In this embodiment, climb basis base 3 in the tower crane and can dismantle the both sides shear force wall of connecting in core section of thick bamboo 1 inside, climb basis base 3 in the tower crane and contain the interior climbing supporting beam 31 of mouth font, connect in interior climbing supporting beam 31 all around and with the core section of thick bamboo 1 be connected interior climbing bracing 32 and the interior climbing lateral bracing 33 between the supporting beam 31.

In this embodiment, the clamping assembly 6 comprises a clamping rod 62 horizontally arranged and connected to the periphery of the tower crane section 4, and a bearing clamp beam 61 connected between the core tube shear wall 2 and the auxiliary frame bearing rod 94, wherein the bearing clamp beam 61 is temporarily detachably connected to the bottom of the tower crane section 4; the end of the clamping rod 62 is connected with the structural cylinder 10 and/or the conversion temporary structure 9;

in this embodiment, the temporary conversion structure 9 includes an auxiliary vertical rod 91 connected to the core tube shear wall 2 and the surrounding structural columns 10, an auxiliary frame horizontal rod 93 connected to the auxiliary vertical rod 91 at intervals in the horizontal direction, a bearing clamp beam 61 connected between the core tube shear wall 2 and the auxiliary frame horizontal rod 93, an auxiliary frame diagonal brace 92 connected between the structural column 10 and the bearing clamp beam 61 at intervals or between the structural column 10 and the auxiliary frame horizontal rod 93, and an auxiliary frame bearing rod 94 connected to the auxiliary vertical rod at the temporary tower crane fixing floor; the auxiliary vertical rod 91, the auxiliary bearing rod 94 and the auxiliary frame horizontal rod 93 form a frame body and are connected with the tower crane joint 4 through the clamping assembly 6; bearing presss from both sides roof beam 61 and can dismantle the 4 bottoms of connection tower crane festival temporarily.

In this embodiment, the conversion foundation 5 includes a square-shaped rotating base upright 54, two rotating base bearing beams 53 connected to the tops of the rotating base upright 54 and arranged in parallel, and a rotating base reinforcing support 56 connected between the two rotating base bearing beams 53; the foundation transfer spandrel girder 53 corresponds and connects tower crane festival base, and tower crane festival 4 is installed on tower crane festival base upper portion, and hoisting mechanism is connected at 4 tops of tower crane festival. The foundation pillars 54 are connected to the foundation bed 52 and the foundation support beams 51 of the core barrel top plate 8.

In this embodiment, the bottom of the conversion foundation 5 is detachably connected to the conversion supporting beam 51, the lower portion of the conversion supporting beam 51 is further connected to a structural reinforcing diagonal brace 55, and the lower portion of the structural reinforcing diagonal brace 55 is fixedly connected to the core barrel 1.

In this embodiment, the load-bearing clamp beam 61 is a double H-shaped steel member formed by two parallel beams vertically connected to the middle of the two parallel beams, and the two parallel beams are both connected between the auxiliary frame load-bearing rod 94 and the core tube shear wall 2.

In this embodiment, the auxiliary frame horizontal rods 93 include an auxiliary frame horizontal cross rod 931 horizontally connected between the two auxiliary vertical rods 91 on opposite sides of the core barrel shear wall 2, and auxiliary frame horizontal diagonal rods 932 connected between the structural column 10 and the auxiliary vertical rods 91, and between the core barrel shear wall 2 and the structural column 10; the horizontal inclined rods 932 of the auxiliary frame are arranged at vertical intervals of the auxiliary vertical rod 91. The auxiliary frame bearing rod 94 is connected between the auxiliary frame vertical rods 91 at the tower crane fixing floor and correspondingly connected with the bearing clamp beam 61.

In this embodiment, the supporting rod interval sets up in the interim structure of conversion, and the supporting rod contains the tower crane festival and fixes with auxiliary frame bearing bar, core section of thick bamboo shear force wall respectively.

With reference to fig. 1 to 10, a construction method of a core tube tower crane high-altitude conversion system of a super high-rise building is further described, which comprises the following specific steps:

step one, installing embedded parts

The embedded part 11 is installed and fixed on the axis and elevation of the design label in advance when the main structure is constructed.

After the core cylinder 1 and the main structure steel bars are bound and before the concrete template is assembled, fixing the embedded part 11 at the axis and the elevation marked on the design drawing by spot welding, wherein the deviation is not more than 5 mm; and after the template is reinforced, measuring the positioning data again, and adjusting immediately if the deviation is more than 5 mm.

In this embodiment, the supporting system is connected with the main body structure through the embedded part 11, the embedded part 11 and the support are connected by fillet welding, the welding grade is one grade, and the flaw detection proportion is 100%.

In the embodiment, the embedded part 11 is embedded in the position 1.5-1.8 m above the bearing clamping beam 61 of the tower crane section 4, and is used for converting the fixing point of the manual hoist when the temporary structure 9 and the clamping assembly 6 are installed, wherein the embedded part 11 is embedded in the wall body of the core tube shear wall 2.

Step two, installing and converting the temporary structure 9

The nth layer of the core tube 1 and the main structure is constructed, the creeping formwork 7 of the core tube 1 is transformed, the creeping formwork 7 climbs to the N +1 layer, and then the temporary structure 9 is installed and converted.

In this embodiment, after the construction of the L25 layer of the vertical structure of the core tube 1 and the modification of the creeping formwork 7 of the core tube 1 are completed, the creeping formwork 7 climbs to the L26 layer, and at this time, the conversion temporary structure 9 for climbing of the tower crane is installed. And finishing the construction of the L27 layer of the vertical wall of the core tube 1, continuously installing the conversion temporary structure 9 for climbing the tower crane and installing the L26 layer of tower crane on the L26 layer of clamping assembly 6.

When the bearing clamping beam 61 is installed, the section of the core barrel 1 is reduced, the concrete wall is contracted inwards, the embedded part 11 cannot be fixed, and the installation conversion temporary structure 9 is used for supporting the installation of the bearing clamping beam 61; conversion temporary structure 9 is connected with core section of thick bamboo roof 8, and conversion temporary structure 9 bottom is made the triangular supports through structure reinforcement bracing 55, guarantees not the compression deformation.

In the embodiment, before installing the 25-layer conversion foundation 5, the tower crane section 4 needs to climb to 26 layers, so that the base of the tower crane section is firstly seated on the bearing clamping beam 61 on the 26 layers, and the second clamping is carried out on the 30 layers, so that the overall stability of the tower crane is ensured; and after the 25-layer tower crane conversion foundation 5 and the corresponding support are installed, the tower crane section base is descended to the conversion foundation 5 and fixed.

When the temporary conversion structure 9 is installed, the temporary conversion structure is installed twice, the auxiliary frame vertical rod 91 is installed firstly, other components such as the auxiliary frame horizontal rod 92, the auxiliary frame inclined support 92 and the auxiliary frame bearing rod 94 are installed after the fixing is completed, the welding is uniformly carried out after the verticality correction is completed, and then the installation and the welding of the next section of auxiliary frame vertical rod 91, the auxiliary frame horizontal rod 92, the auxiliary frame inclined support 92 and the auxiliary frame bearing rod 94 are carried out;

step three, installing a clamping assembly

And the bearing clamp beams 61 and the clamping rods 62 are arranged on the (N + 1) th layer and the upper part at intervals, wherein N is an integer larger than 1. The installation is carried out from bottom to top in sequence.

Step four, climbing tower crane

Climb basis base 3 in the tower crane and stay in core section of thick bamboo 1, further climb the tower crane through the interior device of climbing, before installation nth layer conversion basis 5, need climb the tower crane earlier to the N +1 th layer, make tower crane festival 4 through climbing the frame install on the bearing clamp beam 61 on the N +1 th layer earlier temporarily.

Wherein, the bearing clamp beam 61 is a double H-shaped piece with two parallel beams vertically connected with two parallel cross bars in the middle to form a square, and the two parallel beams are both connected between the auxiliary frame bearing rod 94 and the core tube shear wall 2.

In this embodiment, the climbing of tower crane festival 4 is carried out, falls tower crane festival base on L22 layer. Completing construction of an L31 layer of the vertical structure of the core barrel 1, and completing installation of the conversion temporary structure 9 for the whole climbing of the tower crane; and (3) installing a tower crane on the L30 layer of tower crane suspension clamping component 6, climbing the tower crane, and dropping the base of the tower crane section on the L25 layer.

Wherein, the bearing clamp beam 61 is a double H-shaped piece with two parallel beams vertically connected with two parallel cross bars in the middle to form a square, and the two parallel beams are both connected between the auxiliary frame bearing rod 94 and the core tube shear wall 2.

Step five, construction conversion foundation

And (3) finishing the installation of the tower crane section 4 climbing by using the temporary conversion structure 9, clamping and fixing, and finishing the conversion foundation 5 of the N layers by construction.

The conversion foundation 5 comprises a conversion foundation base 52, a square foundation transfer column 54, two foundation transfer bearing beams 53 connected to the tops of the foundation transfer column 54 and arranged in parallel, and a foundation transfer reinforcing support 56 connected between the two foundation transfer bearing beams 53; the foundation pillars 54 are connected to the foundation bed 52 and the foundation support beams 51 of the core barrel top plate 8.

In the fifth step, when the conversion foundation 5 on the Nth layer is installed, the lower part of the lowest inner climbing support beam 31 is transported to the Nth layer, the conversion foundation 5 is erected on the Nth layer, and the center distance of the conversion foundation 5 is ensured to be matched with the center distance of the main limb of the tower crane joint 4; the lower margin is connected can be dismantled with the tower crane with tower crane festival 4 internal climbing base section below, can dismantle in the tower crane festival 4 that the lower margin directly falls in the conversion basis 5 top of newly erectting, after adjusting the tower crane straightness that hangs down and meeting the requirements, press from both sides behind the tight internal climbing frame jacking bolt, will dismantle the lower margin and weld with the conversion basis 5 of newly erectting.

After whole tower crane straightness that hangs down meets the requirements, press from both sides behind the tight inner climbing frame jacking bolt, will dismantle lower margin and the basic 5 welding of conversion of erectting newly, the detachably sole plate circular arc of 600mm diameter is all around weld, and the leg height is 30 mm.

Wherein, install stress sensor and strain sensor at conversion basis 5 bottom, the change of real time monitoring stress and displacement to be connected with controlling means and be used for the early warning after setting for the limit threshold value.

Step six, tower crane fall-back conversion foundation

And after the construction of the core cylinder top plate 8 is finished, the tower crane section base falls back to the Nth layer to complete the connection foundation conversion.

Seventhly, installing wall-attached pull rods and jacking sleeve frame

When the tower crane section 4 reaches a specified height, installing a wall-attached pull rod and a tower crane jacking sleeve frame on the upper part of the tower crane section 4;

for the seventh step, after the tower crane section base takes root again on the conversion foundation 5, installing a tower crane jacking sleeve frame; jacking sleeve frames are mutually installed through adjacent tower cranes, and meanwhile, the jacking sleeve frames need to be matched by virtue of chain blocks; when the jacking sleeve frame is installed, the opening direction of the jacking sleeve frame, namely the introduction direction of the standard knot, is determined according to the jacking step direction of the tower crane on site.

In this embodiment, tower crane jacking jacket frame contains pull rod assembly, connecting piece and standard festival etc. And hoisting the attached frame on site. During construction, the attachment frame on one side is hung to the attachment point of the tower body. The other side attaching frame is lifted to be in place, and then the two outer side frames are connected into a whole. The frame is leveled and then fixed. And (4) hoisting the double-hole support connected with the wall, namely attaching the lug plate, and welding and fixing. Groove welding is carried out, and the height of a welding leg is 14 mm. The welding pull rod is adopted, the hanging and attaching pull rod is hoisted, the pull rod is in pin joint and is sealed with the cotter pin, the outer sleeve section and the plug-in unit are firstly embedded and are not welded temporarily, and the outer sleeve section and the plug-in unit are firmly bound by an iron wire with the diameter of more than 8 before hoisting.

In the embodiment, the verticality of the tower body is adjusted, a weight with proper weight is hoisted firstly during adjustment, the front and rear moments are adjusted, after the tower body is in a balance position, the theodolite is used for monitoring the deviation of the tower body in two directions, and the deviation of the verticality is adjusted to be not more than 2 per thousand. Welding is carried out on site by adopting a welding pull rod, the outer socket and the plug-in are welded, the welding length of each welding line is not less than 400 mm, the thickness of each welding line is 10 mm, and the welding line cannot have the defects of air holes, slag inclusion and the like; if the splicing pull rod is adopted, the adjusting bolt needs to be adjusted to a proper position. And jacking the tower crane after the attachment acceptance is qualified.

Step eight, dismantling the clamping assembly and converting the temporary structure

And (4) removing the clamping assembly 6 and the temporary conversion structure 9 by using another tower crane in cooperation with the chain block chain, so as to complete the integral conversion of the tower crane foundation.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that may be made by those skilled in the art within the technical scope of the present invention will be covered by the scope of the present invention.