Deep foundation pit trestle drainage structure
By installing PVC drainage pipes and drainage elbows in the lattice columns supporting the trest bridge in the deep foundation pit, automatic drainage is achieved, which solves the serious water problem of the trest board area and reduces construction costs and operation complexity.
Patent Information
- Application Number
- CN202421599481.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-08
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-08
AI Technical Summary
During the construction process, the deep foundation pit supports the trestle is affected by natural rainfall and other water sources, resulting in serious water in the trestle. The existing technology relies on mechanical drainage, which is complicated to operate and high cost.
A deep foundation pit trench drainage structure is designed, including lattice columns, PVC drainage pipes, drain elbows and fixing frames. The PVC drainage pipe runs through the trench plate surface, and drain elbows are set at the bottom. They are fixed with the lattice columns to achieve automatic drainage.
Automatic drainage can be achieved without mechanical assistance, reducing construction costs, improving drainage efficiency, and ensuring construction safety.
Smart Images
Figure CN222975651U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building construction, in particular to a drainage structure for a deep foundation pit trestle bridge. Background Art
[0002] Deep foundation pit engineering is an indispensable part of modern urban construction, especially in the development of underground space in the city center, subway stations, underground garages, and the construction of deep foundation bridges, etc. In these projects, the support trestle bridge, as a common temporary or permanent structure, is often used to span deep foundation pits to provide an operation platform or a passage function for connecting both sides. During the construction of the deep foundation pit support trestle bridge, one of the main challenges faced in construction is the drainage problem. During the construction period of the deep foundation pit, due to the influence of natural rainfall and other water sources, the surface of the trestle bridge board may be seriously waterlogged, which brings certain impacts to the construction and poses a potential threat to the on-site construction safety.
[0003] In the prior art, the drainage of the deep foundation pit support trestle bridge mainly relies on mechanical drainage, using equipment such as water pumps to pump and drain water, which requires a certain amount of manpower and material resources, and the pumping and drainage work needs to be continuously repeated according to the water accumulation situation on-site. The operation is complicated and the cost is relatively high. Therefore, a drainage structure for a deep foundation pit trestle bridge is proposed to solve the above problems. Summary of the Utility Model
[0004] In order to solve the above technical problems, the utility model proposes a drainage structure for a deep foundation pit trestle bridge, which can achieve automatic drainage without mechanical assistance, and achieve the effect of reducing costs and increasing efficiency.
[0005] The technical solution for realizing the purpose of the utility model is: a drainage structure for a deep foundation pit trestle bridge, including lattice columns and a trestle bridge board surface. A PVC drainage pipe is arranged inside the lattice column. The top end of the PVC drainage pipe penetrates into the trestle bridge board surface. A drainage elbow is arranged at the bottom end of the PVC drainage pipe. A plurality of fixing brackets are arranged on the lattice column. The PVC drainage pipe is fixed to the lattice column through the fixing brackets. A drainage pipe cover is arranged at the water outlet end of the drainage elbow.
[0006] In some embodiments, a receiving hole is formed in the trestle bridge board surface. The top end of the PVC drainage pipe is located in the receiving hole. An anti-blocking filter screen is arranged inside the receiving hole. A top pipe cover is arranged above the receiving hole.
[0007] In some embodiments, the water outlet end of the drainage elbow can be connected to an external pipe.
[0008] Compared with the prior art, the utility model has the following remarkable advantages:
[0009] In the present utility model, before installing the lattice columns in the support trestle area, special PVC drain pipes with temporarily sealed ends are fixed on the inner wall of the lattice columns to form an integral structure with the lattice columns for lattice column construction. After the construction is completed, by opening the pipe cover, the accumulated water on the trestle board surface can automatically drain along the pipes without relying on machinery, reducing construction costs. Moreover, it can be used immediately after opening, enabling real-time drainage, with more guaranteed drainage efficiency. Being fixed to the lattice columns makes the entire drainage structure more reliable.
[0010] It solves the problems that the existing drainage of accumulated water on the trestle board area relies on machinery, with complicated operations and high costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] The present utility model will be further explained below in conjunction with the drawings and embodiments:
[0012] Figure 1 is the front view structural schematic diagram provided by the present utility model in an embodiment;
[0013] Figure 2 is the structural schematic diagram of the trestle board surface (exploded) provided by the present utility model in an embodiment.
[0014] DESCRIPTION OF THE REFERENCE NUMERALS:
[0015] 1, lattice column; 2, trestle board surface; 3, PVC drain pipe; 4, drainage elbow; 5, fixing bracket; 6, drainage pipe cover; 7, accommodation hole; 8, anti-blocking filter screen; 9, top pipe cover. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0016] The present utility model will be described in detail below. The technical solutions in the embodiments of the present utility model are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0017] The present utility model provides a deep foundation pit trestle drainage structure through improvement. The technical solution of the present utility model is as follows:
[0018] As Figure 1 - Figure 2As shown in the figure, a deep foundation pit trestle drainage structure includes lattice columns 1 and a trestle board surface 2. A PVC drainage pipe 3 is arranged inside the lattice column 1. The PVC drainage pipe 3 needs to be placed into the lattice column 1 before the construction of the trestle board surface 2 to form an integral whole in advance. The top end of the PVC drainage pipe 3 penetrates into the trestle board surface 2. A drainage elbow 4 is arranged at the bottom end of the PVC drainage pipe 3. A plurality of fixing brackets 5 are arranged on the lattice column 1. The PVC drainage pipe 3 is fixed to the lattice column 1 through the fixing brackets 5. The length of the PVC drainage pipe 3 is determined according to the specific height of the lattice column 1, and thus a plurality of fixing brackets 5 for fixing are welded to ensure the stability of the overall structure. A drainage pipe cover 6 is arranged at the water outlet end of the drainage elbow 4. The drainage pipe cover 6 is actually a temporary plug for the drainage elbow 4 and can be detachably separated.
[0019] In an embodiment, a receiving hole 7 is formed in the trestle board surface 2. A certain slope should be made around the receiving hole 7 to facilitate guiding the accumulated water to the receiving hole 7. The top end of the PVC drainage pipe 3 is located in the receiving hole 7. An anti-blocking filter screen 8 is arranged in the receiving hole 7. When drainage is not required, the anti-blocking filter screen 8 can prevent the pipeline from being blocked by sundries such as sand and gravel. A top pipeline cover 9 is arranged above the receiving hole 7. The top pipeline cover 9 is actually a temporary plug for the PVC drainage pipe 3 and can be detachably separated.
[0020] In an embodiment, the water outlet end of the drainage elbow 4 can be connected to an external pipeline. Generally, the accumulated water is guided to a sump in the foundation pit, which can be carried out through the external pipeline. At the same time, the position of the drainage elbow 4 should be at least higher than the elevation of the basement floor structure.
[0021] The specific working method is as follows: When the deep foundation pit trestle drainage structure is in use, before the construction of the lattice column 1, according to the elevation from the basement floor on site to the top surface of the designed trestle, a special PVC drainage pipe 3 with a length meeting the requirements is fabricated, and a drainage elbow 4 is connected to the bottom end. Then, the fabricated PVC drainage pipe 3 is passed through the lattice column 1 from the inside, and the elevation position of the structural floor is calculated in advance. The drainage elbow 4 part is passed out from the side of the lattice column 1, and a fixing frame 5 is welded for fixation. After the above steps are completed, the construction of the lattice column 1 and the support trestle can be carried out. During the construction of the support trestle, when the trestle structure is being built, a 1% - 3% structural slope should be made along the position where the PVC drainage pipe 3 is located to ensure that the accumulated water on the trestle in the later stage can freely flow to the PVC drainage pipe 3, and the accumulated water is smoothly discharged into the ground through the PVC drainage pipe 3. After the construction of the support trestle is completed, the on-site earth excavation stage is entered. When the earth is excavated to the foundation elevation, at this time, the top pipe cover 9 and the drainage pipe cover 6 of the pipe are removed, and a sump well is set at the bottom of the foundation pit at the bottom end of the pipe, or it is connected to the sump well position with a pipe. When there is obvious accumulated water on the trestle due to rain and other water sources, the accumulated water will automatically drain to the sump well along this drainage pipe. In addition, when the support trestle is dry without accumulated water and does not need drainage, the fabricated top pipe cover 9 can also be used to block it again to prevent materials, dust, or sediment from entering the pipe and blocking the pipe.
[0022] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed by the above technical means, but also include the technical solutions composed of equivalent replacements of the above technical features. The matters not covered by the present utility model belong to the common general knowledge of those skilled in the art.
Claims
1. A deep foundation pit trestle drainage structure, comprising a lattice column (1) and a trestle deck (2), characterized in that: A PVC drainage pipe (3) is arranged in the lattice column (1), the top end of the PVC drainage pipe (3) penetrates into the trestle deck (2), the bottom end of the PVC drainage pipe (3) is arranged with a drainage elbow (4), a plurality of fixing frames (5) are arranged on the lattice column (1), the PVC drainage pipe (3) is fixed to the lattice column (1) via the fixing frames (5), and a drainage pipe cover (6) is arranged at the water outlet end of the drainage elbow (4).
2. A deep foundation pit trestle drainage structure according to claim 1, characterized in that: The pier deck (2) is provided with a receiving hole (7), the top end of the PVC drainage pipe (3) is located in the receiving hole (7), an anti-clogging filter (8) is arranged in the receiving hole (7), and a top end pipe cover (9) is arranged above the receiving hole (7).
3. A deep foundation pit trestle drainage structure according to claim 1, characterized in that: The water outlet end of the drainage elbow (4) can be connected to an external pipeline.