阅读说明：本技术 一种半楼层塔吊顶升施工方法 (Half-floor tower suspended ceiling construction method ) 是由 巫明杰 张立佳 陆晨超 庞小军 熊孝春 高靖宇 于 2021-07-08 设计创作，主要内容包括：本发明公开了一种半楼层塔吊顶升施工方法,根据图纸对群楼进行施工；根据需要在裙楼处根据每台塔吊的覆盖范围分开设置一组塔吊用于吊装主体钢结构；当主体结构达到一定高度后,在主体结构上设置扶墙进行顶升；B栋钢结构通过第二塔吊安装13-15轴/L-G轴范围内的构件至8层主梁完,第二塔吊进行附墙与顶升；C栋第四塔吊安装17-25轴范围内的钢结构至8层主梁安装完成后停工7天；8层主梁往上钢结构部分通过第一塔吊继续安装26-29轴范围内的钢构件；第一塔吊和第二塔吊继续施工,直至所有施工完成。本发明通过对楼群施工的工艺以及工序进行调整,提高施工的合理性,改进后的施工方法整个施工过程中仅有第四塔吊停工7天,有效的缩短了停工时间,缩短施工的周期,减少施工的成本。(The invention discloses a suspended ceiling lifting construction method of a half-floor tower, which is used for constructing group buildings according to a drawing; a group of tower cranes is separately arranged at the skirt building according to the coverage range of each tower crane according to the requirement for hoisting the main steel structure; after the main body structure reaches a certain height, a buttress is arranged on the main body structure for jacking; the B-span steel structure is completed by mounting components within the range of 13-15 shafts/L-G shafts to 8 layers of main beams through a second tower crane, and the second tower crane is attached to a wall and jacked; c, stopping the tower crane for 7 days after the steel structures in the 17-25 shaft range are installed to 8 layers of main beams; continuously installing steel members within the range of 26-29 shafts on the part, upwards to the steel structure, of the 8-layer main beam through a first tower crane; and continuing the construction of the first tower crane and the second tower crane until all the constructions are finished. According to the invention, the process and the working procedures of building group construction are adjusted, so that the rationality of construction is improved, the improved construction method only stops the fourth tower crane for 7 days in the whole construction process, the stop time is effectively shortened, the construction period is shortened, and the construction cost is reduced.)

1. A half-floor tower suspended ceiling construction method is characterized in that: the method comprises the following steps:

1): firstly, constructing group buildings according to drawings, wherein 3 tower buildings are A, B, C tower buildings and a group of skirt room exhibition halls;

2): in the construction process, a group of tower cranes is separately arranged at the skirt building according to the coverage range of each tower crane according to the requirement for hoisting a main steel structure;

3): firstly, constructing a main body structure of each building;

4): after the main body structure reaches a certain height, a buttress is arranged on the main body structure for jacking;

5): mounting members in the range of 13-15 shafts/L-G shafts to 8 layers of main beams by the B-span steel structure through a second tower crane, and then attaching and jacking the second tower crane;

6): meanwhile, C, stopping for 7 days after the installation of a steel structure in the 17-25 axis range of the fourth tower crane to 8 layers of main beams is completed, continuously installing steel members in the 26-29 axis range of the first tower crane on the upper steel structure part by the 8 layers of main beams, continuously constructing the first tower crane and the second tower crane, and only stopping for 7 days by the fourth tower crane;

7): continuously installing steel members within the range of 26-29 shafts on the part, upwards to the steel structure, of the 8-layer main beam through a first tower crane;

8): and then continuing construction of the first tower crane and the second tower crane until all construction is finished.

2. The half-floor tower suspended ceiling construction method of claim 1, characterized in that: the tower crane allocation conditions are as follows:

a third tower crane and a second tower crane are respectively arranged on the A span and the B span according to the coverage range of the tower cranes, and a first tower crane and a fourth tower crane are arranged on the C span.

3. The half-floor tower suspended ceiling construction method of claim 2, characterized in that: the coverage of first tower crane is 20-28 axles, the coverage of second tower crane is 8-24 axles, and the coverage of third tower crane is between 2 axles to 11 and 12 axles, the coverage of fourth tower crane is between 17 axles to 15 axles.

4. The half-floor tower suspended ceiling construction method of claim 1, characterized in that: the concrete construction method of the B-shaped building is as follows: b, mounting steel columns to 9 layers, mounting main beams and intercolumnar supports only on 7 layers and 8 layers, and finishing mounting steel structures on 6 layers and below;

13-15 shafts/J-L shafts near the buttress walls from 6 layers to 4 layers are provided with herringbone supports and cross supports, so that the second tower crane can be smoothly jacked in advance.

5. The half-floor tower suspended ceiling construction method of claim 2, characterized in that: and the B-span steel structure is only provided with members within the range of 13-15 shafts/L-G shafts to finish the installation of 8 layers of main beams, and then the second tower crane is used for supporting and jacking the wall.

6. The half-floor tower suspended ceiling construction method of claim 1, characterized in that: the concrete construction method of the C-shaped ridge is as follows:

c, all columns of the plane are installed to 8 layers, main beams, secondary beams and inter-column supports below 8 layers are installed, and no floor slab and partition wall are installed;

the method comprises the following steps that (1) 9 columns, main beams, secondary beams and inter-column supports with 26 shafts, 27 shafts and 28 shafts intersecting with an F shaft, an H shaft and a K shaft are arranged in 11-8 layers, and no floor slab or partition wall is arranged;

9 columns with 26 shafts, 27 shafts, 28 shafts intersecting with the F shaft, the H shaft and the K shaft, main beams and inter-column supports are arranged on the 12 layers;

3 layers of bidirectional herringbone supports are additionally arranged at the first tower crane from 11 layers to 9 layers;

the fourth tower crane is in 7 layers of positions, 1 layer of bidirectional herringbone support is additionally arranged, and smooth jacking of the first tower crane and the fourth tower crane is guaranteed.

7. The half-floor tower ceiling construction method according to claim 4 or 6, characterized in that: the herringbone support is made of double-channel steel with the Q345 cross section being 32a, and the limb distance of the herringbone support is 14-18 mm.

8. The half-floor tower suspended ceiling construction method of claim 4, wherein: the cross-shaped supporting section adopts a double-channel steel with a section of 40a, and the limb distance is 16-20 mm.

Technical Field

The invention belongs to the technical field of steel structure buildings, and particularly relates to a suspended ceiling lifting construction method of a half-floor tower.

Background

The project is an office comprehensive building and consists of skirt buildings in an exhibition hall among three tower buildings, namely L07-A, L07-B, L07-C and A, B, C, and the project structural system is a steel frame structure. The steel structure part mainly comprises steel stiffness columns of the underground part, framework steel columns and steel beams in A, B, C three tower buildings, and large-span steel beams and steel columns in skirt house exhibition halls. The main steel structure member types comprise welding cross-shaped steel, welding box-shaped steel and welding H-shaped steel, and the total steel consumption is about 1 ten thousand tons.

In the project 3, the tower buildings share an integral basement, the underground part has four layers, and the elevations of the three tower buildings at the overground part are respectively 17 layers above the L07-A floor and 63 m; L07-B ridge 15 layers above the ground, elevation 55 m; L07-C is located at 17 th floor above ground and has elevation of 62 m. The exhibition hall of the skirt house between the tower buildings is 3 floors above the ground and has the elevation of 20 m.

According to the field situation, 4 tower cranes are arranged on the north side of the structure and used for hoisting the main steel structure. And after the steel members enter a construction site, stacking the steel members separately according to the coverage range of each tower crane.

However, in the actual construction process, after the main structure reaches a certain height, a counterfort needs to be arranged on the main structure for jacking. When the group building tower is constructed, the construction progress of each monomer needs to be basically similar, so that the jacking of the tower crane can not be influenced. However, during actual construction, the construction progress of each single body is difficult to be just not restricted by the jacking of the tower crane due to the influence of factors of each party. The problems occurring in the construction process of the project are as follows:

the wall attachment and the jacking of the No. 1 tower crane are carried out between 11-12 layers of the L07-C tower, and the wall attachment and the jacking of the No. 4 tower crane and the No. 2 tower crane are respectively carried out between 7-8 layers of the L07-C tower and the L07-B tower.

At present, the 4# tower crane can be hung to 8L 07-C floors at the highest height. The method is limited by other conditions on site, the 2# tower crane must be jacked before the 4# tower crane, namely the L07-B tower is installed to the 8 layers, then the 4# tower crane cannot be jacked before the 2# tower crane is jacked, the 4# tower crane stops working after members in the coverage range of the 4# tower crane are hoisted to the 8 layers, and the overall construction progress of the L07-C tower is delayed.

According to the current construction progress, if the L07-B tower is completely installed to 8 floors and then the 2# tower is jacked, about 50 days are needed, and the L07-C tower within the range of the 4# tower can be installed to 8 floors after 15 days and then the tower is stopped for about 35 days. After the components in the range of 25-29 shafts of the tower No. 1 are installed to 11 layers, the tower is shut down, the number of shut-down days is large, the construction cost is increased, and meanwhile, the period of engineering construction is seriously influenced.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects, the invention aims to provide the half-floor tower suspended ceiling lifting construction method, the rationality of construction is improved by adjusting the process and the working procedure of building group construction, and each building can be well and independently completed.

The technical scheme is as follows: in order to achieve the purpose, the invention provides a half-floor tower suspended ceiling construction method, which comprises the following steps:

1): firstly, constructing group buildings according to drawings, wherein 3 tower buildings are A, B, C tower buildings and a group of skirt room exhibition halls;

2): in the construction process, a group of tower cranes is separately arranged at the skirt building according to the coverage range of each tower crane according to the requirement for hoisting a main steel structure;

3): firstly, constructing a main body structure of each building;

4): after the main body structure reaches a certain height, a buttress is arranged on the main body structure for jacking;

5): mounting members in the range of 13-15 shafts/L-G shafts to 8 layers of main beams by the B-span steel structure through a second tower crane, and then attaching and jacking the second tower crane;

6): meanwhile, C, stopping for 7 days after the installation of a steel structure in the 17-25 axis range of the fourth tower crane to 8 layers of main beams is completed, continuously installing steel members in the 26-29 axis range of the first tower crane on the upper steel structure part by the 8 layers of main beams, continuously constructing the first tower crane and the second tower crane, and only stopping for 7 days by the fourth tower crane;

7): continuously installing steel members within the range of 26-29 shafts on the part, upwards to the steel structure, of the 8-layer main beam through a first tower crane;

8): and then continuing construction of the first tower crane and the second tower crane until all construction is finished.

Wherein, the tower crane allocation condition is as follows:

a third tower crane and a second tower crane are respectively arranged on the A span and the B span according to the coverage range of the tower cranes, and a first tower crane and a fourth tower crane are arranged on the C span.

Further, the coverage of the first tower crane is 20-28 shafts, the coverage of the second tower crane is 8-24 shafts, the coverage of the third tower crane is 2 shafts to 11 shafts and 12 shafts, and the coverage of the fourth tower crane is 17 shafts to 15 shafts.

Further, the specific construction method of the building B is as follows: b, mounting the steel columns to 6 layers, completing mounting of main beams, secondary beams and inter-column supports below 5 layers, mounting no floor slab and partition walls, mounting main beams and inter-column supports at 6 layers, and mounting no secondary beams, floor slabs and partition walls;

herringbone supports and cross supports are arranged near the buttress walls from the 6 layers to the 4 layers, so that the second tower crane can be smoothly jacked in advance.

Furthermore, the B-span steel structure is only provided with members within the range of 13-15 shafts/L-G shafts to 8 layers of main beams, and then the second tower crane is used for supporting and jacking the wall.

Further, the concrete construction method of the C-shaped ridge is as follows:

c, all columns of the plane are installed to 8 layers, main beams, secondary beams and inter-column supports below 8 layers are installed, and no floor slab and partition wall are installed;

the method comprises the following steps that (1) 9 columns, main beams, secondary beams and inter-column supports with 26 shafts, 27 shafts and 28 shafts intersecting with an F shaft, an H shaft and a K shaft are arranged in 11-8 layers, and no floor slab or partition wall is arranged;

9 columns with 26 shafts, 27 shafts, 28 shafts intersecting with the F shaft, the H shaft and the K shaft, main beams and inter-column supports are arranged on the 12 layers;

3 layers of bidirectional herringbone supports are additionally arranged at the first tower crane from 11 layers to 9 layers;

the fourth tower crane is in 7 layers of positions, 1 layer of bidirectional herringbone support is additionally arranged, and smooth jacking of the first tower crane and the fourth tower crane is guaranteed.

Preferably, the herringbone support is made of double-channel steel with the Q345 cross section of 32a, and the limb distance of the herringbone support is 14-18 mm.

Further preferably, the cross-shaped supporting section is made of 40a double-channel steel, and the limb distance of the cross-shaped supporting section is 16-20 mm.

The technical scheme shows that the invention has the following beneficial effects:

according to the construction method for the suspended ceiling of the half-floor tower, disclosed by the invention, the rationality of construction is improved by adjusting the process and the working procedure of building group construction, and each building can be well and independently completed.

Drawings

FIG. 1 is a schematic structural diagram of a building group according to the present invention;

FIG. 2 is a schematic diagram of the distribution of a tower crane in the invention;

FIG. 3 is a view showing a temporary support arrangement of the frame B according to the present invention;

FIG. 4 is a structural view of a herringbone support A-A of the multi-span temporary support B in the present invention;

FIG. 5 is a structural view of a herringbone support and a cross-shaped support of B-B, C-C in the B-span temporary support of the present invention;

FIG. 6 is a view showing a temporary support arrangement of the C-frame according to the present invention;

FIG. 7 is a structural view of a herringbone support of the C-frame temporary support A-A, B-B, C-C, D-D of the present invention;

FIG. 8 is a structural view of a herringbone support in the C-frame temporary support E-E, F-F, G-G, H-H of the present invention.

Detailed Description

The invention is further elucidated with reference to the drawings and the embodiments.

Examples

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The construction method for the suspended ceiling lift of the half-floor tower in the embodiment comprises the following steps:

1): firstly, constructing group buildings according to drawings, wherein 3 tower buildings are A, B, C tower buildings and a group of skirt room exhibition halls;

2): in the construction process, a group of tower cranes is separately arranged at the skirt building according to the coverage range of each tower crane according to the requirement for hoisting a main steel structure;

3): firstly, constructing a main body structure of each building;

4): after the main body structure reaches a certain height, a buttress is arranged on the main body structure for jacking;

5): mounting members in the range of 13-15 shafts/L-G shafts to 8 layers of main beams by the B-span steel structure through a second tower crane, and then attaching and jacking the second tower crane;

6): meanwhile, C, stopping for 7 days after the installation of a steel structure in the 17-25 axis range of the fourth tower crane to 8 layers of main beams is completed, continuously installing steel members in the 26-29 axis range of the first tower crane on the upper steel structure part by the 8 layers of main beams, continuously constructing the first tower crane and the second tower crane, and only stopping for 7 days by the fourth tower crane;

7): continuously installing steel members within the range of 26-29 shafts on the part, upwards to the steel structure, of the 8-layer main beam through a first tower crane;

8): and then continuing construction of the first tower crane and the second tower crane until all construction is finished.

In this embodiment, the tower crane allocation conditions are as follows:

a third tower crane and a second tower crane are respectively arranged on the A span and the B span according to the coverage range of the tower cranes, and a first tower crane and a fourth tower crane are arranged on the C span.

In this embodiment the coverage of first tower crane is 20-28 axles, the coverage of second tower crane is 8-24 axles, and the coverage of third tower crane is between 2 axles to 11 and 12 axles, the coverage of fourth tower crane is between 17 axles to 15 axles.

The specific construction method of the building B in the embodiment is as follows: b, mounting the steel columns to 6 layers, completing mounting of main beams, secondary beams and inter-column supports below 5 layers, mounting no floor slab and partition walls, mounting main beams and inter-column supports at 6 layers, and mounting no secondary beams, floor slabs and partition walls;

herringbone supports and cross supports are arranged near the buttress walls from the 6 layers to the 4 layers, so that the second tower crane can be smoothly jacked in advance.

In the embodiment, the B-span steel structure is only provided with members within the range of 13-15 shafts/L-G shafts to 8 layers of main beams, and then the second tower crane is used for supporting and jacking the wall.

The concrete construction method of the C-shaped ridge in the embodiment is as follows:

c, all columns of the plane are installed to 8 layers, main beams, secondary beams and inter-column supports below 8 layers are installed, and no floor slab and partition wall are installed;

the method comprises the following steps that (1) 9 columns, main beams, secondary beams and inter-column supports with 26 shafts, 27 shafts and 28 shafts intersecting with an F shaft, an H shaft and a K shaft are arranged in 11-8 layers, and no floor slab or partition wall is arranged;

9 columns with 26 shafts, 27 shafts, 28 shafts intersecting with the F shaft, the H shaft and the K shaft, main beams and inter-column supports are arranged on the 12 layers;

3 layers of bidirectional herringbone supports are additionally arranged at the first tower crane from 11 layers to 9 layers;

the fourth tower crane is in 7 layers of positions, 1 layer of bidirectional herringbone support is additionally arranged, and smooth jacking of the first tower crane and the fourth tower crane is guaranteed.

The herringbone support in the embodiment is made of double-channel steel with the Q345 cross section of 32a, and the limb distance of the herringbone support is 14-18 mm.

In the embodiment, the cross-shaped cross-bracing section is made of 40a double-channel steel, and the limb distance is 16-20 mm.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.