CN221681885U - Detachable prefabricated retaining wall structure of subway open cut station - Google Patents

Abstract

The utility model relates to the technical field of subway construction retaining walls, in particular to a detachable prefabricated retaining wall structure of a subway open cut station. The prefabricated retaining wall comprises a crown beam, a plurality of prefabricated retaining walls are sequentially connected and arranged in reserved grooves at the top of the crown beam, and the prefabricated retaining walls are connected with the crown beam through grouting materials. The prefabricated mode is adopted for on-site splicing, construction is convenient and fast, construction efficiency is improved, construction period is saved, labor force is saved, and construction cost is reduced.

Description

Detachable prefabricated retaining wall structure for subway open-cut station

Technical Field

The utility model relates to the technical field of retaining walls for subway construction, in particular to a detachable prefabricated retaining wall structure for an open-cut subway station.

Background Art

The subway open cut method refers to an underground engineering construction method that first digs the ground, builds the lining in the open air, and then covers and backfills. The open cut method is the most basic and most commonly used construction method in soft soil underground engineering construction.

A cap beam is generally set on the top of the supporting structure of an open-cut subway station. The purpose of setting a concrete retaining wall on the top of the cap beam is: first, to withstand the lateral pressure generated by water and soil pressure and the loads on both sides of the foundation pit to prevent the top edge of the foundation pit from collapsing; second, to prevent surface water and soil from flowing into the foundation pit to ensure the safety of foundation pit construction.

The construction of cast-in-place concrete retaining walls requires on-site formwork. Due to the large plane dimensions of the subway foundation pit, the demand for formwork is very large. The costs of formwork rental, installation, and support are huge, which directly leads to an increase in construction costs. At the same time, since the concrete of the cast-in-place concrete retaining wall is poured on-site, the construction period of long-distance concrete retaining walls is long.

Utility Model Content

The purpose of the utility model is to overcome the above-mentioned defects of the prior art and propose a detachable prefabricated retaining wall structure for an open-cut subway station. The prefabricated retaining wall structure is assembled on site, which is convenient to construct, improves construction efficiency, saves construction time, saves labor, and reduces construction costs.

The technical solution of the utility model is: a detachable prefabricated retaining wall structure of a subway open-cut station, comprising a prefabricated retaining wall, which also includes a crown beam. Several prefabricated retaining walls are connected in sequence and arranged in a reserved groove on the top of the crown beam. The prefabricated retaining wall and the crown beam are connected by pouring grouting material.

In the utility model, a reserved groove is provided at the top of the crown beam and along its length direction, and a plurality of prefabricated retaining walls are arranged in the reserved groove. The width of the reserved groove is greater than the thickness of the prefabricated retaining wall. There is a gap between the inner wall of the reserved groove and the outer wall of the adjacent prefabricated retaining wall, and grouting material is poured in the gap.

A friction-reducing film is provided at the interface between the grouting material and the prefabricated retaining wall.

A type I socket plug is provided at one side of the prefabricated retaining wall along the height direction, and a type II socket plug is provided at the other side of the corresponding prefabricated retaining wall along the height direction, and the type I socket plug and the type II socket plug are arranged correspondingly;

The type I socket plug at one side of the prefabricated retaining wall is connected to the type II socket plug at one side of the adjacent prefabricated retaining wall to achieve the splicing between the two adjacent prefabricated retaining walls.

The type I receiving plug is a plug, and the corresponding type II receiving plug is a plug. The plug is inserted into the plug to achieve the connection of two adjacent prefabricated retaining walls.

Non-shrinkage cement slurry is poured into the gaps between two adjacent precast retaining walls to form a longitudinal retaining wall as a whole between all the precast retaining walls on the top of the crown beam.

The top and bottom of the prefabricated retaining wall are respectively provided with two hoisting embedded parts;

The hoisting embedded parts are arranged symmetrically.

The beneficial effects of the utility model are:

(1) The present application adopts prefabrication and on-site splicing. The retaining wall is prefabricated in blocks and then spliced after being transported to the site. This is not only convenient for construction and improves production efficiency, but also economical and environmentally friendly, saving construction time and labor. Therefore, the retaining wall structure described in the present application can be widely used in foundation pit projects;

(2) The precast retaining wall and the cap beam are connected by pouring grouting material, and the adjacent precast retaining walls are also connected by pouring slurry material, so that the entire retaining wall structure forms a cast whole, so the quality of the entire retaining wall structure can be guaranteed.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of the utility model from top view;

Fig. 2 is a schematic diagram of the cross-sectional structure along the line A-A of Fig. 1;

FIG3 is a schematic diagram of the connection structure of two adjacent prefabricated retaining walls;

FIG4 is a schematic diagram of the local structure of the connection between two adjacent prefabricated retaining walls;

FIG5 is a schematic diagram of the structure of the prefabricated retaining wall provided with the hoisting embedded parts;

FIG. 6 is a schematic diagram of the structure of the hoisting embedded parts.

In the figure: 1 prefabricated retaining wall; 2 crown beam; 3 reserved groove; 4 plastic anti-friction film; 5 type I socket plug; 6 type II socket plug; 7 non-shrinkage cement slurry; 8 lifting embedded parts; 9 bolts; 10 reserved steel bars.

DETAILED DESCRIPTION

In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

The following description sets forth specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in a variety of other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

As shown in Fig. 1, the detachable prefabricated retaining wall structure of the subway open-cut station described in the utility model comprises a crown beam 2 arranged on the top of the pile, and a prefabricated retaining wall 1 arranged on the crown beam 2. The bottom of the crown beam 2 is fixedly connected to the top of the retaining pile, and the top surface of the crown beam 2 is connected to the prefabricated retaining wall 1. Several prefabricated retaining walls 1 are arranged along the length direction of the top of the crown beam 2, and the several prefabricated retaining walls 1 are spliced in sequence along the length direction of the crown beam 2.

As shown in FIG2 , a reserved groove 3 is provided on the top surface of the crown beam 2 along its length direction, and the prefabricated retaining wall 1 is arranged in the reserved groove 3. The width of the reserved groove 3 is greater than the thickness of the prefabricated retaining wall 1, so when the prefabricated retaining wall 1 is placed in the reserved groove 3, there is a gap between the outer wall of the prefabricated retaining wall 1 and the inner wall of the reserved groove 3. CGM grouting material is poured into the gap, thereby achieving a fixed connection between the prefabricated retaining wall 1 and the crown beam 2, so that the prefabricated retaining wall 1 and the crown beam 2 are connected as a whole, improving the integrity of the assembled retaining wall structure and the strength of the connection node between the prefabricated retaining wall 1 and the crown beam 2.

A plastic anti-friction film 4 is provided at the interface where the prefabricated retaining wall 1 contacts the CGM grouting material. By providing the plastic anti-friction film 4, the friction between the prefabricated retaining wall 1 and the grouting material can be appropriately reduced, making it easier to pull the prefabricated retaining wall 1 out of the CGM grouting material in the later stage of construction, thereby achieving the reuse of the prefabricated retaining wall.

As shown in Figures 3 and 4, a type I socket plug 5 is provided at one side of the prefabricated retaining wall 1 along the height direction, and a type II socket plug 6 is provided at the other side of the corresponding prefabricated retaining wall 1 along the height direction, and the type I socket plug 5 and the type II socket plug 6 are arranged correspondingly. When two adjacent prefabricated retaining walls 1 are spliced, the type I socket plug 5 at the side of the prefabricated retaining wall 1 is inserted into the type II socket plug 6 at the side of the adjacent prefabricated retaining wall 1, thereby realizing the connection between the two adjacent prefabricated retaining walls.

In this embodiment, a bolt structure can be used between the type I socket plug 5 and the type II socket plug 6. That is, the type I socket plug 5 is a bolt, and the type II socket plug 6 is a plug. After the bolt is inserted into the plug, the connection between two adjacent prefabricated retaining walls can be achieved.

The joint pores of the adjacent prefabricated retaining walls are filled with non-shrinkage cement slurry 7, and the adjacent prefabricated retaining walls are formed into a longitudinal whole by the non-shrinkage cement slurry 5. In the present application, the joint pores between all adjacent prefabricated retaining walls are filled with non-shrinkage cement slurry 7, so that all prefabricated retaining walls on the crown beam can form a total retaining wall whole, which can not only improve the waterproof performance of the retaining wall structure, but also improve the assembly accuracy.

As shown in Fig. 5, two hoisting embedded parts 8 are respectively provided at the top and bottom of the prefabricated retaining wall 1, and the hoisting embedded parts 8 facilitate the hoisting of the prefabricated retaining wall 1 and the crown beam 2 during the connection process. In this embodiment, in order to improve the stability of the prefabricated retaining wall 1 during the hoisting process, the two hoisting embedded parts 8 at the top are symmetrically arranged, and the hoisting embedded parts 8 at the top and bottom are also symmetrically arranged.

As shown in Fig. 6, the hoisting embedded part 8 includes a bolt 9 at the top and a reserved steel bar 10 at the bottom. The hoisting of the prefabricated retaining wall can be achieved by hoisting the embedded part 8. Since the hoisting embedded part 8 adopts the existing embedded part structure, the structure of the hoisting embedded part is not described in detail.

The construction method of the retaining wall structure is as follows:

In the first step, a prefabricated retaining wall 1 is prefabricated in blocks in a factory. A type I socket joint 5 is provided at one side of the height direction of the prefabricated retaining wall 1, and a type II socket joint 6 is provided at the other side of the height direction of the prefabricated retaining wall, and embedded hoisting devices 8 are provided at the top and bottom of the prefabricated retaining wall.

In the second step, the crown beam 2 is constructed, a reserved groove 3 is provided on the top of the crown beam 2 , and a surface friction-reducing film 4 is installed in the reserved groove 3 .

The third step is to hoist the prefabricated retaining wall 1, with the outer side of the prefabricated retaining wall 1 facing the outside of the foundation pit, and insert the bottom of the prefabricated retaining wall 1 into the reserved groove 3 at the top of the crown beam.

The fourth step is to pour CGM grouting material into the gap between the prefabricated retaining wall 1 and the reserved groove 3.

The fifth step is to install the remaining prefabricated retaining wall 1 in blocks using the third and fourth steps to complete the construction of the retaining wall.

During the installation of the prefabricated retaining wall, the type I socket joint 5 on the prefabricated retaining wall constructed later is inserted into the type II socket joint 6 on the prefabricated retaining wall constructed earlier, and non-shrinkage cement slurry 5 is poured into the joint gap between the two adjacent prefabricated retaining walls to make all the prefabricated retaining walls into a longitudinal whole.

The above is a detailed introduction to the removable prefabricated retaining wall of the subway open-cut station provided by the utility model. The principle and implementation method of the utility model are explained in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model. The above description of the disclosed embodiments enables professional and technical personnel in this field to implement or use the utility model. The various modifications to these embodiments will be obvious to professional and technical personnel in this field, and the general principles defined in this article can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown in this article, but will comply with the widest range consistent with the principles and novel features disclosed in this article.

Claims (5)

1. The detachable prefabricated retaining wall structure of the subway open cut station comprises prefabricated retaining walls and a crown beam, and is characterized by further comprising a plurality of prefabricated retaining walls which are sequentially connected and arranged in reserved grooves at the top of the crown beam, wherein the prefabricated retaining walls are connected with the crown beam through grouting materials;

A I-type receiving plug is arranged at one side surface of the prefabricated retaining wall along the height direction, a II-type receiving plug is arranged at the other side surface of the corresponding prefabricated retaining wall along the height direction, and the I-type receiving plug and the II-type receiving plug are correspondingly arranged;

The I-type receiving plug at one side of the prefabricated retaining wall is connected with the II-type receiving plug at one side of the adjacent prefabricated retaining wall, so that the splicing between the two adjacent prefabricated retaining walls is realized;

and an antifriction film is arranged at the interface of the grouting material and the prefabricated retaining wall.

2. The detachable prefabricated retaining wall structure for the open cut subway station according to claim 1, wherein,

The top of crown roof beam just is equipped with the reservation recess along its length direction, is equipped with several prefabricated retaining wall in the reservation recess, and the width of reservation recess is greater than the thickness of prefabricated retaining wall, has the clearance between the inner wall of reservation recess and the outer wall of adjacent prefabricated retaining wall, has pour grouting material in this clearance.

3. The detachable prefabricated retaining wall structure for the open cut subway station according to claim 1, wherein,

The I-type bearing plug is a plug pin, the corresponding II-type bearing plug is a plug pin, and the plug pin is inserted into the plug pin to realize connection of two adjacent prefabricated retaining walls.

4. The detachable prefabricated retaining wall structure for the open cut subway station according to claim 1, wherein,

And (3) filling non-shrinkage cement paste into the gaps between two adjacent prefabricated retaining walls, so that a longitudinal retaining wall whole is formed between all prefabricated retaining walls at the top of the crown beam.

5. The detachable prefabricated retaining wall structure for the open cut subway station according to claim 1, wherein,

Two hoisting embedded parts are respectively arranged at the top and the bottom of the prefabricated retaining wall;

the hoisting embedded parts are symmetrically arranged.