Foundation pit supporting structure for water conservancy project
By setting fixed columns and through holes outside the steel cage of the foundation pit support structure, the contact area between the concrete, the steel cage and the fixed columns is increased, which solves the problem of insufficient tightness between the concrete and the steel cage, and significantly improves the performance of the underground diaphragm wall. Load-bearing capacity.
Patent Information
- Application Number
- CN202420712685.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-08
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-04-08
AI Technical Summary
In the existing foundation pit support structure, the bonding density between concrete and steel cage is poor, resulting in insufficient load-bearing capacity of underground continuous walls.
Set fixed columns outside the steel cage, and open vertical through holes on the fixed columns to increase the contact area between the concrete, the steel cage and the fixed columns, thereby improving the tightness of the connection between the concrete and the steel cage.
By increasing the contact area, the load-bearing capacity of the underground diaphragm wall is effectively improved, and the tightness of the combination between the concrete and the steel cage is improved.
Smart Images
Figure CN222375431U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of foundation pits, and in particular to a foundation pit support structure for water conservancy projects. Background Art
[0002] Support is a measure of support, reinforcement and protection for the side walls and surrounding environment to ensure the safety of underground structure construction and the surrounding environment of the foundation pit. At present, the foundation pit project is a temporary support and soil reinforcement project taken to protect the smooth open excavation construction of underground space and the surrounding environment from damage. It is often restricted by site conditions and the surrounding environment. Therefore, it is necessary to design a support system to ensure the smooth progress of construction. With the development of engineering construction, foundation pits are getting bigger and deeper. During the foundation construction, it has become the unremitting pursuit of engineering and technical personnel to minimize the cost of foundation pit support and shorten the construction period while ensuring the safety of buildings and foundation pits around the foundation pit.
[0003] Underground continuous wall support is the most effective support method in water conservancy projects. The general operation can be summarized as follows: first, a trenching machine is used on the ground to dig a long and narrow deep trench along the peripheral axis of the deep excavation project under the condition of mud wall protection. After the trench is cleared, a steel cage is suspended in the trench, and then underwater concrete is poured using the conduit method to build a unit trench section. This is done section by section to build a continuous reinforced concrete wall underground as a water interception, anti-seepage, load-bearing, and water-retaining structure. However, in the current concrete pouring of most underground continuous walls, the bonding between concrete and steel cage is poor, resulting in a negative impact on the bearing capacity of the underground continuous wall.
[0004] In view of the above-mentioned related technologies, the inventors believe that a foundation pit support structure for water conservancy projects should be provided to improve the problems of poor bonding between concrete and steel cage and insufficient bearing capacity of underground continuous walls. Utility Model Content
[0005] In order to improve the problem of poor bonding between concrete and steel cage and insufficient bearing capacity of underground continuous wall, the present application provides a foundation pit support structure for water conservancy engineering.
[0006] The present application provides a foundation pit support structure for water conservancy projects, which adopts the following technical solution:
[0007] A foundation pit support structure for water conservancy projects comprises a steel cage and fixed columns fixedly installed on the outer side of the steel cage. Through holes for concrete to pass through are vertically opened on the fixed columns.
[0008] By adopting the above technical scheme, the present application sets a fixed column on the outside of the steel cage in the deep groove, and opens a vertical through hole on the fixed column. During the concrete pouring, not only the inside of the steel cage will be filled with concrete, but the concrete will also contact with the fixed column and bond with it during the concrete solidification process. At the same time, some concrete will flow into the through hole until the concrete pouring is completed, filling the through hole and bonding with the inner wall of the through hole. When the concrete pouring is completed, in the foundation pit support structure of the water conservancy project of the present application, not only the steel cage can contact with the concrete and be bonded and fixed, but also the fixed column and the through hole in the fixed column are in contact with the concrete and bonded and fixed. The fixed column and the through hole greatly increase the contact area between the steel cage and the concrete, improve the bonding tightness between the concrete and the steel cage, and effectively improve the bearing capacity of the underground continuous wall.
[0009] Optionally, the fixing column is evenly arranged on the outside of the steel cage.
[0010] By adopting the above technical solution, the present application arranges a number of evenly distributed fixed columns on the outside of the steel cage, which means that the number of fixed columns on the steel cage is increased, and the number of through holes is also increased, further increasing the contact area between the steel cage and the concrete, improving the bonding tightness between the concrete and the steel cage, and effectively improving the bearing capacity of the underground continuous wall.
[0011] Optionally, a plurality of through holes are provided in parallel.
[0012] By adopting the above technical solution, the present application provides a number of parallel through holes inside the fixed column. The increase in the number of through holes further increases the contact area between the steel cage and the concrete, improves the bonding tightness between the concrete and the steel cage, and effectively improves the bearing capacity of the underground continuous wall.
[0013] Optionally, the through hole wall is provided with a curved portion for increasing the contact area between the concrete and the through hole.
[0014] By adopting the above-mentioned technical solution, the present application provides a curved portion on the wall of the through hole. Since the straight line between two points is the shortest, the curved portion of the present application can effectively increase the hole length of the vertically opened through hole, thereby further increasing the contact area between the steel cage and the concrete, thereby improving the bonding tightness between the concrete and the steel cage, and effectively improving the bearing capacity of the underground continuous wall.
[0015] Optionally, a bottom insertion section for inserting into the bottom of the deep groove is fixedly installed at the bottom of the steel cage, and the bottom insertion section includes a fixed end fixedly connected to the bottom of the steel cage and an insertion end fixedly installed at the fixed end away from the bottom of the steel cage.
[0016] By adopting the above-mentioned technical scheme, the present application fixedly installs a bottom insertion section for inserting into the bottom of the deep groove at the bottom of the steel cage, and the end of the bottom insertion section close to the bottom of the steel cage is fixedly connected to the steel cage, and at the same time, a sharp insertion end is provided at the end of the bottom insertion section away from the bottom of the steel cage. When the steel cage is hoisted into the deep groove, the insertion end can be quickly inserted into the bottom of the deep groove and fix the steel cage by virtue of its sharp shape, which greatly reduces the possibility of excessive tilting and tilting of the steel cage during concrete pouring, thereby improving the efficiency of concrete pouring and the load-bearing balance of the steel cage, and improving the load-bearing capacity of the underground continuous wall.
[0017] Optionally, two bottom insert sections are relatively arranged.
[0018] By adopting the above-mentioned technical scheme, the present application arranges two bottom insertion sections relatively at the bottom of the steel cage. After the two bottom insertion sections are inserted into the bottom of the deep groove, they will form a stable triangular hollow structure with the bottom of the deep groove between the two bottom insertion sections, further optimizing the effect of the bottom insertion sections on fixing the steel cage, and further reducing the possibility of excessive tilting and tilting of the steel cage during concrete pouring, thereby improving the efficiency of concrete pouring and the load-bearing balance of the steel cage, and improving the bearing capacity of the underground continuous wall.
[0019] Optionally, a waterproof layer is fixedly installed inside the steel cage, and two waterproof layers are relatively arranged.
[0020] By adopting the above-mentioned technical scheme, the present application sets two waterproof layers on the inner side of the steel cage, which can effectively reduce the possibility of water infiltrating into the central position inside the steel cage, flowing and colliding in the internal gaps of the concrete, and then destroying the bearing capacity of the underground continuous wall. These two waterproof layers effectively improve the bearing capacity of the underground continuous wall.
[0021] Optionally, the waterproof layer is fixedly connected to the steel cage via the fixing columns.
[0022] By adopting the above-mentioned technical scheme, the present application uses fixed columns to fix the waterproof layer and the steel cage together, leaving a gap between the waterproof layer and the steel cage to facilitate the flow of concrete, thereby increasing the contact area between the concrete and the waterproof layer, and making the fixed bonding between the concrete and the waterproof layer more firmly, thereby optimizing the stability of the waterproof layer, thereby optimizing its waterproof effect, reducing the possibility of water infiltrating into the center position of the steel cage and damaging the bearing capacity of the underground continuous wall, thereby improving the bearing capacity of the underground continuous wall.
[0023] Optionally, a water absorbing surface is provided on a side of the waterproof layer close to the steel cage, and a sealing surface is provided on a side of the waterproof layer away from the steel cage.
[0024] By adopting the above-mentioned technical scheme, the present application provides a water-absorbing surface on the side of the water-proof layer close to the steel cage, and provides a sealing surface on the side of the water-proof layer away from the steel cage. When water penetrates into the water-proof layer from the water-absorbing surface, the sealing surface can greatly reduce the possibility of water seeping out of the water-proof layer again, thereby optimizing the waterproof effect of the water-proof layer, reducing the possibility of water penetrating into the center position of the steel cage and damaging the bearing capacity of the underground continuous wall, thereby improving the bearing capacity of the underground continuous wall.
[0025] In summary, the present application includes at least one of the following beneficial technical effects:
[0026] 1. The foundation pit support structure for water conservancy projects of the present application is provided with a fixed column outside the steel cage in the deep trench, and a vertical through hole is opened on the fixed column, which greatly increases the contact area between the steel cage and the concrete, improves the bonding tightness between the concrete and the steel cage, and effectively improves the bearing capacity of the underground continuous wall;
[0027] 2. The foundation pit support structure for water conservancy projects of the present application has a bottom inserting section fixedly installed at the bottom of the steel cage for inserting into the bottom of the deep groove. The end of the bottom inserting section close to the bottom of the steel cage is fixedly connected to the steel cage, and the end of the bottom inserting section away from the bottom of the steel cage is provided with a sharp insertion end. At the same time, two bottom inserting sections are provided. After being inserted into the bottom of the deep groove, a stable triangular hollow structure is formed with the bottom of the deep groove between the two bottom inserting sections, thereby optimizing the effect of the bottom inserting section on fixing the steel cage, reducing the possibility of excessive tilting and tilting of the steel cage during concrete pouring, thereby improving the efficiency of concrete pouring and the balance of the steel cage load-bearing, and improving the load-bearing capacity of the underground continuous wall;
[0028] 3. The foundation pit supporting structure for water conservancy projects of the present application has two waterproof layers relatively arranged on the inner side of the steel cage, and the waterproof layer is provided with a water absorption surface on the side close to the steel cage, and a sealing surface is provided on the side of the waterproof layer away from the steel cage. When water penetrates into the waterproof layer from the water absorption surface, the sealing surface can greatly reduce the possibility of water seeping out of the waterproof layer again, thereby optimizing the waterproof effect of the waterproof layer, reducing the possibility of water penetrating into the center position of the steel cage and damaging the bearing capacity of the underground continuous wall, thereby improving the bearing capacity of the underground continuous wall. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application;
[0030] Figure 2 is a cross-sectional view of an embodiment of the present application;
[0031] Figure 3 yes Figure 2 A local enlarged schematic diagram of point A in the middle.
[0032] Explanation of the reference numerals: 1. steel cage; 11. waterproof layer; 111. water absorption surface; 112. sealing surface; 2. fixing column; 3. through hole; 31. bending part; 4. bottom insertion section; 41. fixing end; 42. insertion end. DETAILED DESCRIPTION
[0033] The following is combined with Figure 1 - Provide further details of this application.
[0034] The embodiment of the present application discloses a foundation pit support structure for water conservancy engineering.
[0035] Reference Figure 1-3 The foundation pit support structure for water conservancy projects includes a steel cage 1 placed inside a deep trench, and cylindrical fixing columns 2 are welded outside the steel cage 1. The fixing columns 2 are arranged in multiple rows and are evenly distributed. A plurality of curved through holes 3 are opened in parallel on the fixing columns 2, and a curved curved portion 31 is arranged in the through hole 3. Since the straight line between two points is the shortest, the curved portion 31 of the present application can effectively increase the hole length of the vertically opened through hole 3, which can further increase the contact area between the steel cage 1 and the concrete. A bottom insertion section 4 for inserting into the bottom of the deep groove is welded at the bottom of the steel cage 1. The bottom insertion section 4 is welded to the bottom of the steel cage 1 through a fixed end 41. At the same time, a sharp insertion end 42 is fixedly connected to the end of the fixed end 41 away from the bottom of the steel cage 1. When the steel cage 1 is hoisted into the deep groove, the insertion end 42 can be quickly inserted into the bottom of the deep groove and fix the steel cage 1 by virtue of its sharp shape, which greatly reduces the possibility of excessive tilting of the steel cage 1 during concrete pouring. In addition, two bottom insertion sections 4 are relatively arranged. After the bottom insertion sections 4 are inserted into the bottom of the deep groove, they will form a stable triangular hollow structure with the bottom of the deep groove between the two bottom insertion sections 4, further optimizing the effect of the bottom insertion sections 4 on fixing the steel cage 1.
[0036] A waterproof layer 11 is installed inside the steel cage 1 through the fixed column 2, and two waterproof layers 11 are relatively arranged. A water-absorbing surface 111 is arranged on the side of the waterproof layer 11 close to the steel cage 1. The surface is uneven and has water-absorbing ability. It can effectively reduce the possibility of water penetrating into the center position of the steel cage 1, and flowing and colliding in the internal gaps of the concrete, thereby destroying the bearing capacity of the underground continuous wall. A sealing surface 112 is arranged on the side of the waterproof layer 11 away from the steel cage 1. When water penetrates into the waterproof layer 11 from the water-absorbing surface 111, the sealing surface 112 can greatly reduce the possibility of water seeping out of the waterproof layer 11 again.
[0037] The implementation principle of a foundation pit support structure for a water conservancy project in an embodiment of the present application is as follows: during concrete pouring, the steel cage 1 is first hoisted into a deep groove, and the insertion end 42 can be quickly inserted into the bottom of the deep groove and fix the steel cage 1 by virtue of its sharp shape, and then concrete is poured, the interior of the steel cage 1 will be filled with concrete, and the concrete will also contact with a number of fixed columns 2 and bond during the concrete solidification process, and at the same time, some concrete will flow in from a number of internal curved through holes 3 until the concrete pouring is completed and fills the through holes 3 and bonds with the inner walls of the through holes 3; when the concrete pouring is completed, in the foundation pit support structure for the water conservancy project of the present application, not only the steel cage 1 can contact with the concrete and be bonded and fixed, but also the fixed columns 2 and the through holes 3 in the fixed columns 2 are in contact with the concrete and are bonded and fixed, the fixed columns 2 and the through holes 3 greatly increase the contact area between the steel cage 1 and the concrete, improve the bonding tightness between the concrete and the steel cage 1, and effectively improve the bearing capacity of the underground continuous wall.
[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A foundation pit support structure for water conservancy projects, characterized in that: The invention comprises a steel cage (1), a fixing column (2) fixedly mounted on the outside of the steel cage (1), a through hole (3) for concrete to pass through being vertically opened on the fixing column (2), a plurality of fixing columns (2) being evenly arranged on the outside of the steel cage (1), and a curved portion (31) for increasing the contact area between the concrete and the through hole (3) being arranged on the hole wall.
2. A foundation pit support structure for water conservancy engineering according to claim 1, characterized in that: A plurality of through holes (3) are provided in parallel.
3. A foundation pit support structure for water conservancy engineering according to claim 1, characterized in that: A bottom insertion section (4) for inserting into the bottom of the deep groove is fixedly mounted on the bottom of the steel cage (1); the bottom insertion section (4) comprises a fixed end (41) fixedly connected to the bottom of the steel cage (1) and an insertion end (42) fixedly mounted on the fixed end (41) and away from the bottom of the steel cage (1).
4. A foundation pit support structure for water conservancy engineering according to claim 3, characterized in that: Two bottom insert sections (4) are arranged opposite to each other.
5. The foundation pit support structure for water conservancy engineering according to claim 1, characterized in that: A waterproof layer (11) is fixedly installed inside the steel cage (1), and two waterproof layers (11) are arranged opposite to each other.
6. A foundation pit support structure for water conservancy engineering according to claim 5, characterized in that: The waterproof layer (11) is fixedly connected to the steel cage (1) via the fixing column (2).
7. A foundation pit support structure for water conservancy engineering according to claim 6, characterized in that: A water absorbing surface (111) is provided on a side of the waterproof layer (11) close to the steel cage (1), and a sealing surface (112) is provided on a side of the waterproof layer (11) away from the steel cage (1).