CN212052740U

CN212052740U - Structure for supporting plate type quick support replacement in deep foundation pit

Info

Publication number: CN212052740U
Application number: CN202020497835.3U
Authority: CN
Inventors: 崔浓辉; 孙瑞甲; 林荣运; 林文硕; 李红梅; 王珊
Original assignee: China Construction Fourth Bureau First Construction Engineering Co Ltd
Current assignee: China Construction Fourth Bureau First Construction Engineering Co Ltd
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2020-12-01
Anticipated expiration: 2030-04-07

Abstract

The utility model discloses a structure for supporting a plate type quick support change in a deep foundation pit, which comprises vertical enclosure structure type steel supporting piles arranged around the foundation pit, wherein a basement structure with an underground outdoor wall is arranged in the foundation pit, a basement floor is arranged on the basement structure, inner supports are arranged around the vertical enclosure structure type steel supporting piles, a plain concrete layer is laid at the bottom of the foundation pit, a basement bottom plate at the bottom of the basement structure is laid on the plain concrete layer, and the thickness of the basement bottom plate is the same as that of the plain concrete layer; and a support-replacing concrete plate is arranged between the vertical enclosure structure section steel support pile and the outer wall of the underground chamber, and a hole is arranged between the support-replacing concrete plate and the support-replacing concrete plate. The utility model discloses effectively improve the construction quality of whole basement structure for the construction progress has saved manpower, material resources input, and the construction degree of difficulty is little and the security is high.

Description

Structure for supporting plate type quick support replacement in deep foundation pit

Technical Field

The utility model relates to a support plate-type structure that props fast in deep basal pit belongs to the building technology field.

Background

With the increasingly mature technology of urban underground space development in China, deep foundation pit engineering is widely applied to housing construction projects. And these construction projects often adjoin established engineering and main municipal public facilities etc. have higher requirement for foundation ditch security, for this deep basal pit inner support technique has become essential foundation ditch safety support means. In the prior art, when the support replacement and dismantling construction is carried out on the inner support of the deep foundation pit, the problems of long period, poor construction flexibility, high secondary pouring leakage risk of the inner support hole reserved on the outer wall of the basement and the like exist. And the construction progress of the upper main structure is greatly influenced, a large amount of manpower is needed to be invested for replacing and supporting the outer wall of the basement to be dismantled, and the anti-leakage effect of the outer wall of the basement is difficult to achieve.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a structure that props is traded fast in deep basal pit inner support plate-type to effectively improve the construction quality of whole basement structure, and make the construction degree of difficulty little and the security high, thereby overcome not enough that prior art exists.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model discloses a structure that board-like quick change of support was supported in deep basal pit, including setting up the vertical envelope shaped steel fender pile around the foundation ditch, be equipped with the basement structure that has the basement outer wall in the foundation ditch, be equipped with the basement floor on the basement structure, be equipped with the interior support around the vertical envelope shaped steel fender pile, laid one deck plain concrete layer bottom the foundation ditch, the basement bottom plate of basement structure bottom is laid on plain concrete layer, and basement bottom plate thickness is the same with the thickness on plain concrete layer; and a support-replacing concrete plate is arranged between the vertical enclosure structure section steel support pile and the outer wall of the underground chamber, and a hole is arranged between the support-replacing concrete plate and the support-replacing concrete plate.

Since the technical scheme is used, the utility model discloses compare with prior art, the utility model discloses can accomplish in the work progress and trade in the construction of basement structure and prop and demolish work, prop the structure because of trading and support lower one deck than interior, can accomplish and support the construction of carrying out upper portion basement structure after demolising again in, the risk of the hole secondary pouring that supports in the unavoidable lower outdoor wall and reserve produces the seepage has effectively improved the construction quality of whole basement structure for the construction progress, saved manpower, material resources input, the construction degree of difficulty is little and the security is high.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

The figures are labeled as follows: 1-vertical enclosure structure section steel support piles, 2-foundation pits, 3-inner supports, 4-basement structures, 5-basement floors, 6-basement outer walls, 7-support-replacing concrete slabs, 8-holes, 9-basement floors and 10-plain concrete layers.

Detailed Description

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

The utility model is formed according to the construction method of the inner supporting plate type quick support change in the deep foundation pit and is used for the method, as shown in figure 1, the method is to complete the support change and removal operation while the basement structure is constructed; the concrete construction steps are as follows:

a. after the construction of the vertical enclosure structure section steel supporting pile 1 is completed, firstly excavating a foundation pit 2 to a depth convenient for making an inner support 3, and immediately making the inner support 3 of the vertical enclosure structure section steel supporting pile 1;

b. continuously excavating the foundation pit 2 to the designed depth;

c. constructing a basement structure 4 on the bottom floor of the foundation pit 2;

d. laying a plain concrete layer 10 with the thickness equal to the height of the basement bottom plate 9 at the bottom of the foundation pit 2;

e. when the basement structure 4 is constructed to the basement floor 5 which is one floor lower than the inner support, steel bars are implanted into the inner sides of the vertical enclosure structure section steel support piles 1, and meanwhile, templates for supporting the basement floor 5, the basement outer wall 6 and the support concrete plate 7 which are one floor lower than the inner support are erected; binding a reinforcing mesh on the template, wherein the reinforcing mesh is connected with the implanted reinforcing steel bars; then pouring the constructed basement structure 4 and the surrounding vertical enclosing structure section steel supporting piles 1 into an integral structure through a group of support-replacing concrete plates 7 by concrete pouring;

f. after the strength grade of the poured concrete reaches 80%, the template is dismantled; filling earthwork to the basement outer wall 6 at the bottom of the support-changing concrete slab 7 and the vertical enclosure structure section steel support pile 1 through the hole 8 between the support-changing concrete slabs 7;

g. and then, the inner support 3 is cut off by a cutting machine, so that the operation of replacing the support of the whole deep foundation pit and removing the inner support is completed.

The support-replacing concrete slabs 7 are of trapezoidal or triangular flat plate structures, and after one group of support-replacing concrete slabs 7 are connected with the outer wall 6 of the basement, holes 8 are formed in the two support-replacing concrete slabs 7. When the reinforcing mesh is bound, the position of the hole 8 is reserved so that the hole 8 can be used as a later construction channel. The elevation of the support-changing concrete plate 7 is as high as the elevation of the basement floor 5 at the bottom layer of the inner support.

The structure of the support plate type quick support change in the deep foundation pit of the utility model is composed according to the method and used for the method, as shown in fig. 1, the structure comprises a vertical enclosure structural steel support pile 1 arranged around a foundation pit 2, a basement structure 4 with a basement outer wall 6 is arranged in the foundation pit 2, a basement floor 5 is arranged on the basement structure 4, an inner support 3 is arranged around the vertical enclosure structural steel support pile 1, a plain concrete layer 10 is laid at the bottom of the foundation pit 2, a basement bottom plate 9 at the bottom of the basement structure 4 is laid on the plain concrete layer 10, and the thickness of the basement bottom plate 9 is the same as that of the plain concrete layer 10; a concrete plate 7 is arranged between the vertical enclosure structure section steel supporting pile 1 and the outer wall 6 of the basement, and a hole 8 is arranged between the concrete plate 7 and the concrete plate 7.

The supplementary description of the utility model is as follows:

in specific construction, the basement structure 4 may be first constructed to a position one floor lower than the inner support 3. Then, chiseling the vertical enclosure structure section steel supporting piles 1, and implanting reinforcing steel bars at the chiseling positions of the vertical enclosure structure section steel supporting piles 1, wherein the implantation depth of the reinforcing steel bars meets the standard requirement. The length of the reserved steel bars of the basement outer wall 6 and the basement floor 5 meets the requirement of lap joint length. And then integrally binding the steel bars reserved for the vertical enclosing structure section steel supporting pile 1, the basement outer wall 6 and the basement floor 5 with the steel bar of the support-changing concrete slab 7, and pouring concrete higher than the basement floor 5 by one grade. After the concrete strength grade of the support-changing concrete plate 7 reaches 80%, the inner support 3 is removed, and after the inner support 3 is removed, the support-changing concrete plate 7 replaces the inner support 3. And after construction is finished, earthwork backfilling is carried out on the space at the bottom of the support concrete plate 7 through the holes 8 between the support concrete plates 7, so that the whole deep foundation pit support changing and inner support dismantling work is finished.

The utility model discloses enough accomplish in the work progress and trade in the construction of basement structure and prop and demolish work, prop the structure and support the lower one deck than interior because of trading, can accomplish and support the construction that carries out upper portion basement structure after demolising again in the interior, avoid supporting the risk that the hole secondary pouring of reserving produced the seepage in the lower outdoor wall, effectively improved the construction quality of whole basement structure for the construction progress, saved manpower, material resources and dropped into, the construction degree of difficulty is little and the security is high.

Claims

1. The utility model provides a structure that board-like quick change of support was propped in deep basal pit, is equipped with basement structure (4) that have basement outer wall (6) including setting up vertical envelope shaped steel fender pile (1) all around in foundation pit (2), is equipped with basement floor (5), its characterized in that on basement structure (4): the inner supports (3) are arranged on the periphery of the vertical enclosure structure section steel support pile (1), a plain concrete layer (10) is laid at the bottom of the foundation pit (2), a basement bottom plate (9) at the bottom of the basement structure (4) is laid on the plain concrete layer (10), and the thickness of the basement bottom plate (9) is the same as that of the plain concrete layer (10); a support concrete plate (7) is arranged between the vertical enclosure structure section steel support pile (1) and the outer wall (6) of the basement, and a hole (8) is arranged between the support concrete plate (7) and the support concrete plate (7).