A flood-prevention retaining wall heightening structure for an open section of a subway

Abstract

The present invention relates to a structure for raising flood-control retaining walls in an open section of a subway. A new retaining wall structure is arranged outside an existing retaining wall structure in the open section. The new retaining wall structure includes a retaining wall base and a precast concrete baffle. The height of the retaining wall base is flush with the height of the existing retaining wall structure in the open section. The precast concrete baffle is arranged above the retaining wall base. The existing retaining wall structure in the open section and the new retaining wall structure are arranged at a certain distance, and a maintenance passage that also serves as a drainage passage is formed between the two. The advantages of the present invention are: it not only meets the requirement of not affecting train operations during construction, but also reduces the additional construction land as much as possible. Compared with the traditional solution of adding a thick and heavy retaining wall to raise the height, it saves more investment economically. From the overall aesthetic point of view, the retaining wall structure appears to be lighter and more beautiful. It has great reference value for the design of raising flood-control retaining walls in the later development of cities.

Description

Technical Field

[0001] The invention relates to the technical field of flood control structures, in particular to a flood control retaining wall heightening structure for an open section of a subway. Background Art

[0002] With the development of the city, there are more and more urban roads, and the ground hardening area is common, but the soil that can absorb and promote underground runoff is becoming less and less, resulting in insufficient ability of the city to cope with heavy rainfall. The height of the retaining wall structure designed by the original flood control standard cannot meet the requirements of heavy rainfall. It is common for stations and open sections to be flooded during heavy rains, posing a great safety risk to subway operations and people's safety. Summary of the invention

[0003] The purpose of the present invention is to provide a flood-prevention retaining wall heightening structure for an open section of a subway in response to the above-mentioned deficiencies in the prior art, by adding a new retaining wall structure consisting of a retaining wall base and a precast concrete baffle on the outside of the existing retaining wall structure in the open section of the subway to meet the objective need of increasing the height of the flood-prevention retaining wall; at the same time, by adding an inspection channel that also serves as a drainage channel between the existing retaining wall structure and the new retaining wall structure in the open section, directional drainage is achieved while ensuring the drainage effect.

[0004] The purpose of the present invention is achieved by the following technical solutions:

[0005] A flood-prevention retaining wall heightening structure for an open section of a subway, comprising an existing retaining wall structure for the open section, wherein the existing retaining wall structure for the open section is arranged outside the subway operating line, and is characterized in that a newly built retaining wall structure is arranged outside the existing retaining wall structure for the open section, wherein the newly built retaining wall structure comprises a retaining wall base and a precast concrete baffle, wherein the height of the retaining wall base is flush with the height of the existing retaining wall structure for the open section, and the precast concrete baffle is arranged above the retaining wall base; the existing retaining wall structure for the open section and the newly built retaining wall structure are arranged at a certain distance, and a maintenance channel which also serves as a drainage channel is formed between the two.

[0006] A groove is preset on the top of the retaining wall base, and the precast concrete retaining plate is installed in the groove.

[0007] The thickness of the precast concrete baffle is smaller than the width of the groove, and the gap between the two is fixed and limited by filling fine stone concrete.

[0008] A U-shaped steel plate is arranged between the groove and the precast concrete baffle.

[0009] Along the line direction of the subway running line, a plurality of the precast concrete baffles are arranged on the baffle wall base, and the joints between adjacent precast concrete baffles are sealed by epoxy mortar.

[0010] The butt joint surfaces on both sides of the precast concrete baffle are respectively provided with concave and convex tongue-and-groove grooves that match each other or both are provided with concave tongue-and-groove grooves.

[0011] The retaining wall base is connected to the existing retaining wall structure of the open section through embedded reinforcement to form an integral structure.

[0012] A concrete backfill layer of a certain height is arranged at the bottom of the space between the existing retaining wall structure of the open section and the newly built retaining wall structure.

[0013] The advantages of the present invention are: it not only meets the requirement of not affecting train operations during the construction process, but also reduces the new construction land as much as possible. Compared with the traditional solution of adding thick and heavy retaining walls to raise the height, it saves investment economically. From the overall aesthetic point of view, the retaining wall structure appears to be lighter and more beautiful, which has great reference value for the design of raising flood control retaining walls in the later development of cities; the structure is simple and reasonable, the construction is convenient, and it is suitable for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 It is a structural schematic diagram of the precast concrete baffle in the present invention;

[0016] Figure 3 for Figure 2 II-direction cross-sectional view;

[0017] Figure 4 It is a waterproof structure diagram of the interface position of the precast concrete baffle in the present invention;

[0018] Figure 5 It is a structural cross-sectional view of the precast concrete baffle in the present invention. DETAILED DESCRIPTION

[0019] The features of the present invention and other related features are further described in detail below through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:

[0020] like Figure 1-5 As shown in the figure, marks 1-11, A and B respectively represent: the existing retaining wall structure 1 of the open section, the retaining wall base 2, the precast concrete retaining plate 3, the U-shaped steel plate 4, the fine stone concrete 5, the embedded reinforcement 6, the concave tongue and groove 7, the convex tongue and groove 8, the epoxy mortar 9, the maintenance passage 10, the concrete backfill layer 11, A inside the operating area, and B outside the operating area.

[0021] Example: Figure 1As shown, in this embodiment, the heightening structure of the flood-proof retaining wall of the subway open section is used to deal with the situation where the existing retaining wall structure 1 of the open section cannot meet the higher flood-proof requirements due to insufficient height. The existing retaining wall structure 1 of the open section is arranged outside the subway operating line, such as Figure 1 As shown, the inner side of the existing retaining wall structure 1 of the open section is the operating area A, and the outer side is the operating area B.

[0022] In this embodiment, the main body of the heightened structure of the flood-prevention retaining wall in the open section of the subway includes a newly built retaining wall structure arranged outside the existing retaining wall structure 1 in the open section, that is, the newly built retaining wall structure is located outside the operating area B.

[0023] The newly built retaining wall structure is composed of a retaining wall base 2 and a precast concrete retaining plate 3, wherein the retaining wall base 2 is an L-shaped structure, and its bottom is fixed to the existing retaining wall structure 1 of the open section through the embedded steel bar 6 and connected to form an integral structure, thereby ensuring the stability of the newly built retaining wall structure. At the same time, the L-shaped structure of the retaining wall base 2 forms a certain space between it and the existing retaining wall structure 1 of the open section, and the space can be used as an inspection channel 10 for later maintenance and repair by technical personnel. The overall height of the retaining wall base 2 is flush with the height of the existing retaining wall structure 1 of the open section.

[0024] A groove extending along the subway line direction is provided at the top of the retaining wall base 2, and the precast concrete baffle 3 is installed in the groove. Specifically, the thickness of the precast concrete baffle 3 is less than the width of the groove; after the precast concrete baffle 3 is installed, the gap between it and the groove is filled with fine stone concrete 5 of a higher grade than the concrete used in the retaining wall base 2, so that the precast concrete baffle 3 is fixedly installed on the retaining wall base 2. During the actual installation, the fine stone concrete 5 is first poured into a part of the bottom to play a certain positioning role for the precast concrete baffle 3. At this time, the position of the precast concrete baffle 3 can be corrected, and after the position is corrected, it is poured and vibrated around to complete the installation.

[0025] In addition, if Figure 1 As shown, in this embodiment, the precast concrete baffle 3 is arranged at a position relatively outside the groove, and the filled fine stone concrete 5 is arranged at a position relatively inside the groove; in this way, the fine stone concrete 5 can be relied on to provide stronger resistance to the precast concrete baffle 3 during flood control and water stopping, ensuring that the precast concrete baffle 3 will not overturn due to water pressure, thereby improving the flood control and water stopping effect.

[0026] In this embodiment, a U-shaped steel plate 4 is arranged between the groove and the precast concrete baffle 3 inside it, and the U-shaped steel plate 4 is attached to the inner wall of the groove; by setting the U-shaped steel plate 4, the structural rigidity of the groove position can be effectively guaranteed to ensure the flood prevention and water retaining effect.

[0027] Combination Figures 2 to 4As shown, the precast concrete baffle 3 in this embodiment adopts a multi-piece splicing structure along the direction of the subway operation line to avoid the construction inconvenience caused by a single precast concrete baffle 3 that is too large and too heavy. Concave tongue-and-groove 7 is respectively provided on both sides of the plate body joint surface of the precast concrete baffle 3. After the adjacent precast concrete baffles 3 are installed in place, epoxy mortar 9 is used to grout the concave tongue-and-groove 7 where the two are butted, so that each precast concrete baffle 3 is sealed, so as to improve the structural strength and further ensure its flood prevention and water retaining effect.

[0028] like Figure 5 As shown, in addition to respectively setting the concave tongue-and-groove 7 on the two side joint surfaces of the precast concrete baffle 3, the concave tongue-and-groove 7 can also be set on one side of the joint surface, and a convex tongue-and-groove 8 matching the concave tongue-and-groove 7 can be set on the other side. In this way, the concave and convex tongue-and-groove splicing can be formed between adjacent precast concrete baffles 3, further improving the strength of each precast concrete baffle 3.

[0029] like Figure 1 As shown, the lower part of the maintenance passage 10 that needs to be reserved between the retaining wall base 2 of the newly built retaining wall structure and the existing retaining wall structure 1 of the open section is backfilled with C30 concrete to a height of 500mm as a concrete backfill layer 11. The maintenance passage can also be used as a drainage passage, so that the accumulated water can be discharged in a direction, avoiding the unnecessary discharge of drainage holes at the bottom of conventional retaining walls.

[0030] In the specific implementation of this embodiment: the surface of the concrete backfill layer 11 can be set with a certain slope to improve the drainage efficiency and drainage effect. At the same time, in some extreme weather conditions, the accumulated water in the existing retaining wall structure 1 of the open section can also be led out from the wall to the drainage channel outside the wall and drained through the drainage channel to effectively solve the drainage problem in the existing retaining wall structure 1 of the open section. Similarly, the accumulated water outside the newly built retaining wall structure can also be introduced into the drainage channel for drainage. Both ends of the drainage channel can be connected to the urban drainage system through pipes or other means.

[0031] Although the above embodiments have described in detail the concepts and embodiments of the present invention with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and changes can still be made to the present invention without departing from the scope of the claims, so they are not described one by one here.

Claims

1. A subway open section flood control retaining wall heightening structure, comprising an existing retaining wall structure of the open section, wherein the existing retaining wall structure of the open section is arranged outside the subway operating line, and is characterized in that: A newly built retaining wall structure is arranged outside the existing retaining wall structure of the open section, and the newly built retaining wall structure includes a retaining wall base and a precast concrete baffle. The height of the retaining wall base is flush with the height of the existing retaining wall structure of the open section, and the precast concrete baffle is arranged above the retaining wall base; the existing retaining wall structure of the open section and the newly built retaining wall structure are arranged at a certain distance, and a maintenance channel that also serves as a drainage channel is formed between the two; The retaining wall base is connected to the existing retaining wall structure of the open section through embedded reinforcement to form an integral structure.

2. A subway open section flood protection wall heightening structure according to claim 1, characterized in that: A groove is preset on the top of the retaining wall base, and the precast concrete retaining plate is installed in the groove.

3. The subway open section flood protection wall heightening structure according to claim 2 is characterized by: The thickness of the precast concrete baffle is smaller than the width of the groove, and the gap between the two is fixed and limited by filling fine stone concrete.

4. A subway open section flood protection wall heightening structure according to claim 2 or 3, characterized in that: A U-shaped steel plate is arranged between the groove and the precast concrete baffle.

5. The subway open section flood protection wall heightening structure according to claim 1 is characterized by: Along the line direction of the subway running line, a plurality of the precast concrete baffles are arranged on the baffle wall base, and the joints between adjacent precast concrete baffles are sealed by epoxy mortar.

6. The subway open section flood protection wall heightening structure according to claim 5 is characterized by: The butt joint surfaces on both sides of the precast concrete baffle are respectively provided with concave and convex tongue-and-groove grooves that match each other or both are provided with concave tongue-and-groove grooves.

7. The subway open section flood protection wall heightening structure according to claim 1 is characterized by: A concrete backfill layer of a certain height is arranged at the bottom of the space between the existing retaining wall structure of the open section and the newly built retaining wall structure.

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