CN-117188386-B - Construction process for gravity type wharf cast-in-situ breast wall

CN117188386BCN 117188386 BCN117188386 BCN 117188386BCN-117188386-B

Abstract

The invention provides a construction process for a gravity wharf cast-in-place breast wall, which comprises the following steps of S1) layering, namely dividing the breast wall to be constructed into at least two layers from top to bottom, and carrying out layered construction according to the sequence from bottom to top, S2) template installation, namely template assembly according to a tool type large template scheme, wherein the template assembly comprises an inner template and an outer template which are positioned at two sides of a caisson, and an end template positioned at the end part of the caisson, the template installation height part is overlapped with the caisson, so that the caisson is coated by the template, S3) template adjustment, namely adjusting the size of a casting cavity formed by the template by utilizing an adjusting component between the end template and the inner template or the outer template, and/or rotating the end template along the inner template or the outer template by the adjusting component, so that the end template forms an inclined plane to supplement deviation of the caisson, and S4) template casting, namely casting the template according to a mode of firstly middle and secondly two sides.

Inventors

CHEN GUOPING
SUN QIANJIN
CHEN KUN
GU LINGFENG
TANG JIANGANG
XU RONG

Assignees

中交第三航务工程局有限公司
中交第三航务工程局有限公司上海建设工程分公司
中交三航第一工程(上海)有限公司
中交三航第一工程(杭州)有限公司

Dates

Publication Date: 20260508
Application Date: 20230809

Claims (10)

1. The construction process for the gravity wharf cast-in-situ breast wall is characterized by comprising the following steps of: S1) layering, namely dividing a breast wall to be constructed into at least two layers from top to bottom, and performing layering construction according to the sequence from bottom to top; S2) template installation, namely template assembly is carried out according to layering by using a tool type large template scheme, wherein the template assembly comprises an inner template and an outer template which are positioned at two sides of the caisson, and an end template which is positioned at the end part of the caisson, and the template installation height part is overlapped with the caisson, so that the caisson is covered by the template; s3) adjusting the template, namely adjusting the size of a pouring cavity formed by the template by utilizing an adjusting component between the end template and the inner template or the outer template; and/or rotating the end mould along the inner mould plate or the outer mould plate by adjusting the assembly, so that the end mould forms an inclined plane to supplement the deviation of the caisson; s4) pouring the template, wherein the template is poured in a mode of firstly middle and secondly two sides.
2. The construction process for gravity type wharf cast-in-place breast wall according to claim 1, wherein the step S1) is divided into at least four layers, and the thickness of each layer is gradually reduced from bottom to top.
3. The construction process for a gravity wharf cast-in-place breast wall according to claim 2, wherein the four layers are a base layer, a first adjustment layer, a second adjustment layer and a leveling layer, respectively, and the thickness of the base layer is equal to or greater than the sum of the thicknesses of the three later layers.
4. The construction process for the gravity wharf cast-in-place breast wall according to claim 2, wherein in the step S4), the formwork pouring further comprises adjusting the height of the construction surface through a first adjusting layer and a second adjusting layer respectively, and the adjusting range of the first adjusting layer is larger than that of the second adjusting layer.
5. The construction process for the gravity wharf cast-in-place breast wall according to claim 4, wherein in the step S4), a casting mode is selected for casting the foundation layer, and after casting the foundation layer, stone filling construction is performed on the outer side of the template, and stone casting construction is performed on the first adjustment layer, the second adjustment layer and the leveling layer.
6. The construction process for the gravity wharf cast-in-place breast wall according to claim 1, wherein in the step S4), the construction of the next layer is specifically performed after the construction of the next layer is completed and the settlement is completed, and then the construction of the previous layer is performed.
7. The construction process for the gravity wharf cast-in-place breast wall according to claim 1, wherein in the step S2) the formwork installation, the connection between the inner formwork and the outer formwork is further included, specifically, a top bracing beam for connecting the inner formwork and the outer formwork is disposed on the top surface of the formwork, and an operation platform is disposed on the top bracing beam.
8. The construction process for a gravity wharf cast-in-place breast wall according to claim 7, wherein the two ends of the top support beam are provided with a steel bar limiting device, the steel bar limiting device comprises angle steel welded back to form a positioning groove, positioning steel bars are installed on the positioning groove, and the positioning groove is marked with a steel bar binding position.
9. The construction process for the gravity wharf cast-in-place breast wall according to claim 1, wherein in the step S2), the inner formwork is installed first, the outer formwork is installed second, the end formwork is installed last, and the low-foaming polyethylene plates are arranged at the splicing positions of the formworks.
10. The construction process for the gravity wharf cast-in-place breast wall according to claim 1, further comprising the steps of removing the inner template and the outer template, removing the end templates, splicing the inner template and the outer template through a plurality of template units, and removing the inner template and the outer template at intervals according to a mode of one section of the inner template and one section of the outer template.

Description

Construction process for gravity type wharf cast-in-situ breast wall Technical Field The invention relates to the technical field of pre-descent construction for a large-span steel structure arch bridge in bridge construction, in particular to a construction process for a gravity wharf cast-in-situ breast wall. Background In the prior art, in gravity type wharf construction, due to sinking errors of a caisson and the fact that a breast wall is not necessarily equal in height and the like in construction, the whole construction is difficult to achieve, and in the prior art, most of the gravity type wharf construction is formed by a simple truss template or a planar steel template, so that the whole construction operation is slow in progress, and the construction period is influenced. Disclosure of Invention The invention aims to provide a construction process for a gravity wharf cast-in-situ breast wall, which improves the whole construction efficiency by selecting a large formwork formed by direct assembly and the like. The invention is realized by the following technical scheme. The construction process for the gravity wharf cast-in-situ breast wall comprises the following steps: S1) layering, namely dividing a breast wall to be constructed into at least two layers from top to bottom, and performing layering construction according to the sequence from bottom to top; S2) template installation, namely template assembly is carried out according to layering by using a tool type large template scheme, wherein the template assembly comprises an inner template and an outer template which are positioned at two sides of the caisson, and an end template which is positioned at the end part of the caisson, and the template installation height part is overlapped with the caisson, so that the caisson is covered by the template; s3) adjusting the template, namely adjusting the size of a pouring cavity formed by the template by utilizing an adjusting component between the end template and the inner template or the outer template; and/or rotating the end mould along the inner mould plate or the outer mould plate by adjusting the assembly, so that the end mould forms an inclined plane to supplement the deviation of the caisson; s4) pouring the template, wherein the template is poured in a mode of firstly middle and secondly two sides. Further, in the step S1), at least four layers are separated, and the thickness of each layer is gradually thinned from bottom to top. Further, the four layers are a base layer, a first adjusting layer, a second adjusting layer and a leveling layer respectively, and the thickness of the base layer is greater than or equal to the sum of the thicknesses of the rear three layers. Further, in the step S4), the method further includes adjusting the height of the construction surface through the first adjusting layer and the second adjusting layer, and the adjusting range of the first adjusting layer is larger than that of the second adjusting layer. Further, in the step S4) of template pouring, a pouring mode is selected for pouring the foundation layer, and after the foundation layer is poured, stone filling construction is carried out on the outer side of the template, and stone throwing construction is adopted for the first adjusting layer, the second adjusting layer and the leveling layer. Further, in the step S4), in the casting of the template, specifically, after the construction of the structure of the next layer is completed and the settlement is completed, the construction of the structure of the previous layer is performed. Further, in the step S2), the method further includes connecting the inner template and the outer template, specifically, setting a top supporting beam connecting the inner template and the outer template on the top surface of the template, and setting an operation platform on the top supporting beam. Further, the two ends of the shoring beam are provided with the steel bar limiting devices, the steel bar limiting devices comprise angle steel welded back to form positioning grooves, positioning steel bars are arranged on the positioning grooves, and the positioning grooves are marked with steel bar binding positions. Further, in the step S2) of installing the formwork, specifically, an inner formwork is installed first, an outer formwork is installed second, an end formwork is installed last, and a low-foaming polyethylene plate is arranged at the splicing position of the formworks. The inner template and the outer template are assembled through a plurality of template units, and the inner template and the outer template are disassembled at intervals according to the mode of one section of the inner template and one section of the outer template when being disassembled. The beneficial effects of the invention are as follows: in the invention, the construction treatment is carried out in a layered mode, so that the construction can be carried out after a certain period