阅读说明：本技术 大型悬挑结构建筑物地下室后浇带支撑施工方法 (Construction method for supporting post-cast strip of basement of large-scale overhanging structure building ) 是由 陈良 黄晖 王慧文 于 2019-07-31 设计创作，主要内容包括：本发明提供一种大型悬挑结构建筑物地下室后浇带支撑施工方法,包括以下步骤：①隔跨拆除负二层原有后浇带支撑；②后浇带两侧梁的两端实施刚性支撑：③后浇带两侧楼面板端部实施刚性支撑；④后浇带两侧梁底部及楼面板底部实施支撑加固；⑤重复步骤①～④对负一层后浇带实施支撑加固。本发明的方法,通过对大型悬挑结构建筑物地下室后浇带采用钢结构与钢管组合支撑技术,能够有效解决地下室后浇带常用的钢管加扣件加固不能满足地下室上部外悬挑钢结构在施工时采用塔吊加汽车吊的施工作业要求的技术问题。(The invention provides a post-cast strip supporting construction method for a basement of a large cantilever structure building, which comprises the following steps of: firstly, detaching the support of the original post-cast strip of the negative second layer at intervals; two ends of two side beams of the post-cast strip are rigidly supported: thirdly, rigid support is implemented at the end parts of the floor panels at the two sides of the post-cast strip; fourthly, supporting and reinforcing the bottoms of the two side beams of the post-cast strip and the bottom of the floor panel; fifthly, repeating the steps from the first step to the fourth step to support and reinforce the post-cast strip bearing the first layer. According to the method, the steel structure and steel pipe combined supporting technology is adopted for the basement post-cast strip of the large-scale overhanging structure building, so that the technical problem that the construction operation requirement that a tower crane and a truck crane are adopted for construction of the outer overhanging steel structure at the upper part of the basement in the construction process cannot be met by commonly used steel pipe and fastener reinforcement of the basement post-cast strip can be effectively solved.)

1. A post-cast strip supporting construction method for a basement of a large cantilever structure building is characterized by comprising the following steps:

Firstly, detaching the support of the original post-cast strip of the negative second layer at intervals;

Two ends of two side beams of the post-cast strip are rigidly supported: two ends of two side beams of the negative two-layer post-cast strip are provided with two side beam supporting structures of the post-cast strip, and the specific method comprises the following steps: a first main support steel pipe is arranged between two ends of two side beams of the negative two-layer post-cast strip and the negative two-layer bottom plate, the upper end and the lower end of the first main support steel pipe are respectively and fixedly provided with 1 first supporting steel plate which is respectively tightly propped against the two side beams of the negative two-layer post-cast strip and the negative two-layer bottom plate, the lower parts of the negative two-layer top plates at two ends of the two side beams of the negative two-layer post-cast strip are respectively provided with 1 first supporting steel plate, the lower parts of 2 first supporting steel plates are respectively provided with 1 first inclined support steel pipe, the upper end of each first inclined support steel pipe is fixedly connected with the first supporting steel plate, and the lower end of each first inclined support steel pipe is fixedly connected with the upper part of the first main support steel;

Thirdly, rigid support is implemented at the end parts of the floor plates at two sides of the post-cast strip: the method comprises the following steps of arranging support structures for floor plates on two sides of a post-cast strip at the end parts of the floor plates on two sides of the post-cast strip, and specifically comprises the following steps: a second supporting steel plate is arranged below a second layer top plate of the two side beams of the second layer rear pouring belt, a second main supporting steel pipe is arranged between the second supporting steel plate and the second layer bottom plate, 1 second supporting steel plate is fixedly arranged at each of the upper end and the lower end of the second main supporting steel pipe, the second supporting steel plate at the upper end is welded with the second supporting steel plate, and the second supporting steel plate at the lower end is tightly propped against the second layer bottom plate;

Fourthly, supporting and reinforcing the bottoms of the two side beams of the post-cast strip and the bottom of the floor panel: the bottom of the beam on two sides of the post-cast strip except 2 end parts and the bottom of the negative 2-layer top plate are provided with supports, and the concrete method comprises the following steps: a fastener-type steel pipe scaffold is erected on the bottom plate of the secondary loading layer, the fastener-type steel pipe scaffold comprises vertical support rods, channel steel is arranged at the bottoms of the beams at the two sides of the post-cast strip except for 2 end parts, the channel steel is connected with the corresponding vertical support rods of the fastener-type steel pipe scaffold by using adjustable U-shaped supports, and the U-shaped supports are adjusted to enable the channel steel to be tightly propped against the beams at the two sides of the secondary loading layer; arranging a batten support steel pipe at the lower part of the negative second-layer top plate, connecting the batten support steel pipe with a corresponding vertical support rod of a fastener type steel pipe scaffold through a U-shaped support, arranging a plurality of battens between the batten support steel pipe and the bottom of the negative second-layer top plate, and adjusting the U-shaped support to enable the battens to be tightly propped against the bottom of the negative second-layer top plate;

fifthly, repeating the steps from the first step to the fourth step to support and reinforce the post-cast strip bearing the first layer.

2. the large cantilever structure building basement post-cast strip supporting construction method according to claim 1, characterized in that: in the step IV, the channel steel is 8# channel steel, and the battens are arranged at a distance of 300 mm.

Technical Field

the invention relates to a support construction method for a basement post-cast strip of a building, in particular to a support construction method for a basement post-cast strip of a large cantilever structure building.

Background

The large overhanging structure building is usually visible, the large overhanging structure building usually adopts a steel structure outer overhanging design, the outer overhanging steel structure is generally hoisted by a hoisting method taking a tower crane as a main part and an automobile crane as an auxiliary part during construction, the large overhanging structure building is generally provided with at least 2 layers of basements, a post-cast settlement belt is arranged between a main building and the basements of the building, the post-cast settlement belt is sealed after the construction of the main building structure is completed and the settlement is stable, the post-cast settlement belt cannot be sealed during the construction of the outer overhanging steel structure, so the post-cast settlement belt needs to be supported, the conventional post-cast settlement belt supporting method is usually a single steel pipe and fastener reinforcing method, however, the post-cast settlement belt supporting and reinforcing method cannot meet the construction requirements of the automobile crane when the outer overhanging steel structure construction is carried out in the face of a 130T automobile crane, so the steel structure outer overhanging structure of the large overhanging structure building is researched by adopting the tower crane as a main part, when the construction method of hoisting the truck crane is assisted, what method is adopted to reinforce the basement post-cast strip is necessary.

Disclosure of Invention

the purpose of the invention is: aiming at the problems in the prior art, the post-cast strip supporting construction method for the basement of the large cantilever structure building is provided.

The technical scheme of the invention is as follows: the invention relates to a post-cast strip supporting construction method for a basement of a large cantilever structure building, which comprises the following steps of:

Firstly, detaching the support of the original post-cast strip of the negative second layer at intervals;

Two ends of two side beams of the post-cast strip are rigidly supported: two ends of two side beams of the negative two-layer post-cast strip are provided with two side beam supporting structures of the post-cast strip, and the specific method comprises the following steps: a first main support steel pipe is arranged between two ends of two side beams of the negative two-layer post-cast strip and the negative two-layer bottom plate, the upper end and the lower end of the first main support steel pipe are respectively and fixedly provided with 1 first supporting steel plate which is respectively tightly propped against the two side beams of the negative two-layer post-cast strip and the negative two-layer bottom plate, the lower parts of the negative two-layer top plates at two ends of the two side beams of the negative two-layer post-cast strip are respectively provided with 1 first supporting steel plate, the lower parts of 2 first supporting steel plates are respectively provided with 1 first inclined support steel pipe, the upper end of each first inclined support steel pipe is fixedly connected with the first supporting steel plate, and the lower end of each first inclined support steel pipe is fixedly connected with the upper part of the first main support steel;

Thirdly, rigid support is implemented at the end parts of the floor plates at two sides of the post-cast strip: the method comprises the following steps of arranging support structures for floor plates on two sides of a post-cast strip at the end parts of the floor plates on two sides of the post-cast strip, and specifically comprises the following steps: a second supporting steel plate is arranged below a second layer top plate of the two side beams of the second layer rear pouring belt, a second main supporting steel pipe is arranged between the second supporting steel plate and the second layer bottom plate, 1 second supporting steel plate is fixedly arranged at each of the upper end and the lower end of the second main supporting steel pipe, the second supporting steel plate at the upper end is welded with the second supporting steel plate, and the second supporting steel plate at the lower end is tightly propped against the second layer bottom plate;

fourthly, supporting and reinforcing the bottoms of the two side beams of the post-cast strip and the bottom of the floor panel: the bottom of the beam on two sides of the post-cast strip except 2 end parts and the bottom of the negative 2-layer top plate are provided with supports, and the concrete method comprises the following steps: a fastener-type steel pipe scaffold is erected on the bottom plate of the secondary loading layer, the fastener-type steel pipe scaffold comprises vertical support rods, channel steel is arranged at the bottoms of the beams at the two sides of the post-cast strip except for 2 end parts, the channel steel is connected with the corresponding vertical support rods of the fastener-type steel pipe scaffold by using adjustable U-shaped supports, and the U-shaped supports are adjusted to enable the channel steel to be tightly propped against the beams at the two sides of the secondary loading layer; arranging a batten support steel pipe at the lower part of the negative second-layer top plate, connecting the batten support steel pipe with a corresponding vertical support rod of a fastener type steel pipe scaffold through a U-shaped support, arranging a plurality of battens between the batten support steel pipe and the bottom of the negative second-layer top plate, and adjusting the U-shaped support to enable the battens to be tightly propped against the bottom of the negative second-layer top plate;

Fifthly, repeating the steps from the first step to the fourth step to support and reinforce the post-cast strip bearing the first layer.

the further scheme is as follows: in the step IV, the channel steel is 8# channel steel, and the battens are arranged at a distance of 300 mm.

the invention has the positive effects that: according to the construction method for supporting the basement post-cast strip of the large-scale cantilever structure building, the steel structure and steel pipe combined supporting technology is adopted for the basement post-cast strip of the large-scale cantilever structure building, so that the technical problem that the construction operation requirement that the outer cantilever steel structure at the upper part of the basement is lifted by a tower crane and a truck during construction cannot be met by common steel pipe and fastener reinforcement of the basement post-cast strip can be effectively solved.

Drawings

FIG. 1 is a flow chart of a method of the present invention;

FIG. 2 is a schematic structural view of rigid supporting and reinforcing of two ends of a beam at two sides of a post-cast strip according to the present invention;

FIG. 3 is a schematic structural view of rigid supporting and reinforcing of the end portions of the floor panels on both sides of the post-cast strip according to the present invention;

FIG. 4 is a schematic structural view of the present invention for supporting and reinforcing the bottom of the beams at both sides of the post-cast strip;

FIG. 5 is a schematic structural view of the present invention for supporting and reinforcing the bottom of the floor panels on both sides of the post-cast strip;

fig. 6 is a schematic structural view of the basement negative 2-layer top plate supporting and reinforcing method.

The reference numbers in the above figures are as follows:

a layer of top plate 1 is arranged, and a layer of post-cast strip two side beams 11 are arranged; carrying a second-layer top plate 2 and carrying two side beams 21 of a second-layer post-cast strip; the post-cast strip comprises a post-cast strip two-side beam support structure 3, a first main support steel pipe 31, a first supporting steel plate 32, a first supporting steel plate 33 and an inclined support steel pipe 34; the post-cast strip comprises floor plate supporting structures 4 on two sides of a post-cast strip, a second main support steel pipe 41, a second supporting steel plate 42 and a second supporting steel plate 43; channel steel 5; a U-shaped rest 6; batten 7, batten support steel pipe 8, fastener type steel pipe scaffold 9, vertical support rod 91, horizontal support rod 92, vertical cross brace 93 and horizontal cross brace 94.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

(example 1)

The construction method for supporting the post-cast strip of the basement of the large cantilever structure building in the embodiment is described by taking the example that the basement of the building is provided with 2 floors, and obviously, the basement is provided with 1 floor or more than 2 floors, and the method is basically the same.

Referring to fig. 1, the construction method for supporting the post-cast strip of the basement of the large cantilever structure building is implemented by the following steps:

firstly, detaching the support of the original post-cast strip of the negative two layers at intervals: and (4) controlling the dismantling within 2-3 spans each time, and carrying out the steel structure support construction of the subsequent steps in time after the dismantling.

two ends of two side beams of the post-cast strip are rigidly supported: referring to fig. 2, post-cast strip two-side beam support structures 3 are arranged at two ends of a negative two-layer post-cast strip two-side beam 21, and the specific method is as follows: a first main supporting steel pipe 31 is arranged between two ends of the two side beams 21 of the negative two-layer post-cast strip and a negative two-layer bottom plate (not shown in the figure), the upper end and the lower end of the first main supporting steel pipe 31 are respectively fixedly provided with 1 first supporting steel plate 32 which is respectively tightly propped against the two side beams 21 of the negative two-layer post-cast strip and the negative two-layer bottom plate, the lower parts of the two top plates 2 at the two ends of the two side beams 21 of the negative two-layer post-cast strip are respectively provided with 1 first supporting steel plate 33, the lower parts of the 2 first supporting steel plates 33 are respectively provided with 1 first inclined supporting steel pipe 34, the upper end of each first inclined supporting steel pipe 34 is fixedly connected with the first supporting steel plate 33, and the lower end of each first inclined supporting steel pipe 34 is fixedly connected with the upper part of the first main supporting steel.

Thirdly, rigid support is implemented at the end parts of the floor plates at two sides of the post-cast strip: referring to fig. 3, the post-cast strip two-side floor panel supporting structure 4 is arranged at the end part of the floor panel at the two sides of the post-cast strip, and the specific method comprises the following steps: the second supporting steel plate 43 is arranged below the negative second-layer top plate 2 of the negative second-layer post-cast strip two-side beam 21, the second main supporting steel pipe 41 is arranged between the second supporting steel plate 43 and the negative second-layer bottom plate, 1 second supporting steel plate 42 is fixedly arranged at each of the upper end and the lower end of the second main supporting steel pipe 41, the second supporting steel plate 42 at the upper end is welded with the second supporting steel plate 43, and the second supporting steel plate 42 at the lower end is tightly propped with the negative second-layer bottom plate.

fourthly, supporting and reinforcing the bottoms of the two side beams of the post-cast strip and the bottom of the floor panel: referring to fig. 4 to 6, supports are arranged at the bottoms of the beams on two sides of the post-cast strip except for 2 end parts and at the bottom of the negative 2-layer top plate, and the specific method is as follows: a fastener-type steel pipe scaffold 9 is erected on the bottom plate of the negative second floor, the fastener-type steel pipe scaffold 9 comprises a vertical supporting rod 91, a horizontal supporting rod 92, a vertical cross brace 93 and a horizontal cross brace 94, channel steel 5 is arranged at the bottoms of the beams at two sides of the post-cast strip except for 2 end parts, the channel steel 5 is connected with the vertical supporting rod 91 corresponding to the fastener-type steel pipe scaffold 9 through an adjustable U-shaped support 6 (commercially available products), and the U-shaped support 6 is adjusted to enable the channel steel 5 to be tightly propped against the beams 21 at two sides of the negative second floor post-cast strip; the lower part of the negative two-layer top plate 2 is provided with a batten support steel pipe 8, the batten support steel pipe 8 is connected with a vertical support rod 91 corresponding to a fastener type steel pipe scaffold 9 through a U-shaped support 6, a plurality of battens 7 are arranged between the batten support steel pipe 8 and the bottom of the negative two-layer top plate 2, and the U-shaped support 6 is adjusted to enable the battens 7 to be tightly propped against the bottom of the negative two-layer top plate 2. In the step, the channel steel 5 is preferably 8# channel steel, and the battens 7 are preferably arranged at a distance of 300 mm.

fifthly, supporting and reinforcing the two side beams 11 of the one-layer rear pouring belt and the one-layer top plate according to the steps from the first step to the fourth step.

the above embodiments are illustrative of specific embodiments of the present invention, and are not restrictive of the present invention, and those skilled in the relevant art can make various changes and modifications without departing from the spirit and scope of the present invention to obtain corresponding equivalent technical solutions, and therefore all equivalent technical solutions should be included in the scope of the present invention.