Hidden drainage channel for leakage of superimposed replacement layer of raft foundation

Abstract

The utility model belongs to the technical field of building construction, and discloses a raft foundation laminated replacement layer leakage buried drainage channel which comprises a waterproof plate, a covered channel is formed in the waterproof plate, a water collecting pipe is arranged in the covered channel, a water collecting hole is formed in the water collecting pipe, a gravel layer is arranged around the covered channel and the water collecting pipe, and a concrete layer is laid on the top of the covered channel. According to the construction technology, a hidden type drainage channel construction technology for leakage of a superimposed replacement layer of a raft foundation is adopted, a covered channel is cut and chiseled on a basement raft, the covered channel exposes the combined face of a new raft and an old raft, a perforated drainage pipe is laid in the covered channel and slopes towards a nearby water collecting pit or drainage ditch to conduct dredging drainage, and concrete is poured on the upper portion to seal the covered channel. By means of the construction technology, terrace accumulated water caused by raft leakage can be effectively removed, and the problem of basement leakage is solved. Meanwhile, due to the fact that the hidden type design is adopted, the appearance and the using function of the building cannot be affected, and high practicability and attractiveness are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction, and relates to a construction technology of a raft foundation superimposed replacement layer seepage concealed drainage ditch, and specifically relates to a raft foundation superimposed replacement layer seepage concealed drainage ditch. Background Art

[0002] During the construction of raft foundation, leakage problems often occur due to the influence of various factors such as foundation conditions and construction technology, which not only affects the bearing capacity of the foundation, but also may have a serious impact on the service life of the building. Especially in areas with high groundwater levels or strong permeability of foundation soil, the risk of leakage is more prominent. Therefore, how to further improve the anti-seepage performance of raft foundation has become a problem to be solved in the current construction engineering field.

[0003] In order to solve the leakage problem in raft foundation construction, the engineering community has been constantly exploring and innovating construction methods. At present, the common practice is to replace the basement floor with large-scale concrete, including replacing the floor with part of the column pier concrete to increase the superposition layer. However, due to the damage of the original waterproof structure during the replacement process and the loose joints between the new and old concrete of some superposition layers, local leakage occurs, and the floor situation is complicated and it is difficult to accurately find the leakage point. Utility Model Content

[0004] The utility model aims to provide a raft foundation superimposed replacement layer seepage buried drainage trough which has a simple structure and is easy to use, and improves the bearing capacity of the foundation by arranging one or more layers of replacement materials between the raft foundation and the foundation, while reducing or eliminating leakage.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: to provide a raft foundation superimposed replacement layer leakage buried drainage trough, which includes a waterproof board, a hidden groove is opened on the waterproof board, a water collecting pipe is arranged in the hidden groove, a plurality of water collecting holes are opened on the water collecting pipe, a gravel layer is arranged around the hidden groove and the water collecting pipe, and a concrete layer is laid on the top of the hidden groove.

[0006] Preferably, the water collecting pipe is a PVC water collecting pipe.

[0007] Preferably, a waterproof layer is provided between the concealed groove and the concrete layer.

[0008] Preferably, the waterproof layer is a polypropylene cloth, the width of the polypropylene cloth is consistent with the width of the concealed groove, and the polypropylene cloth is located above the water collecting pipe and the gravel layer.

[0009] Preferably, steel bars are arranged between the polypropylene cloth and the concrete layer.

[0010] Preferably, the concrete layer is T-shaped after pouring.

[0011] Preferably, the water collecting pipe is placed in a tilted state in the dark groove.

[0012] Preferably, the slope of the water collecting pipe is 0.5% to ensure smooth drainage; too large a slope will cause the depth of the concealed groove to be cut too large, and too small a slope will affect the drainage of the water pipe.

[0013] Preferably, the water collection hole is a hole with a diameter of 10 mm.

[0014] Preferably, the gravel layer uses gravel with a diameter of 10-20 mm to meet the water permeability requirements, and water will flow into the water collecting pipe from the gaps in the gravel.

[0015] The utility model has the following beneficial effects: the utility model adopts the construction technology of concealed drainage trough for leakage of raft foundation superimposed replacement layer, which is a construction technology for clearing accumulated water when leakage occurs after concrete replacement and superimposed layer is added, and the location of the leakage point is uncertain and cannot be blocked. This technology is to cut and chisel out a concealed groove on the raft slab of the basement, and the concealed groove exposes the joint surface of the new and old raft slabs. A perforated drainage pipe is laid in the concealed groove and sloped toward the nearest sump or drainage ditch for drainage, and concrete is poured on the upper part to close the concealed groove. This construction technology can effectively eliminate the ground water caused by raft leakage and solve the problem of basement leakage. At the same time, because it adopts a concealed design, it will not affect the appearance and use function of the building, and has high practicality and aesthetics. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main structure of the utility model of a raft foundation superimposed replacement layer seepage buried drainage trough.

[0017] Figure 2 The utility model is a schematic diagram of the water collecting pipe structure in the concealed drainage trough with leakage of the superimposed replacement layer of the raft foundation.

[0018] Figure 3 It is a side structural schematic diagram of the utility model of the raft foundation superimposed replacement layer leakage buried drainage trough.

[0019] In the figure: 1. Newly poured diluted concrete; 2. Polypropylene cloth; 3. Water collecting pipe; 31. Water collecting hole; 4. Gravel; 5. Raft bottom; 6. Concealed groove; 7. Water collecting pipe slope; 8. Original concrete. DETAILED DESCRIPTION

[0020] In order to explain in detail the technical content and structural features of the utility model of the raft foundation superimposed replacement layer seepage buried drainage trough, the following is further explained in combination with the implementation method and the accompanying drawings.

[0021] like Figure 1 , 2As shown in Figure 3, the utility model of the raft foundation superimposed replacement layer seepage buried drainage trough includes a waterproof board, a dark groove 6 is provided on the waterproof board, a PVC water collecting pipe 3 is arranged in the dark groove 6, a plurality of water collecting holes 31 with a diameter of 10 mm are provided on the water collecting pipe 3, crushed stones 4 are laid around the dark groove 6 and the water collecting pipe 3, a concrete layer 1 is laid on the top of the dark groove 6, a waterproof layer is arranged between the dark groove 6 and the concrete layer 1, and the waterproof layer is preferably a polypropylene cloth 2. Steel bars are arranged between the polypropylene cloth 2 and the concrete layer 1. The concrete layer 1 is T-shaped after pouring. The water collecting pipe 3 is placed in the dark groove in an inclined state, and the slope of the water collecting pipe is 0.5%.

[0022] The construction method of the utility model is as follows:

[0023] 1. The cutting width of the dark groove 6 is 200mm, and the cutting depth is 300mm, ensuring that the joint position of the new and old waterproof boards is exposed. According to the position of the dark groove positioning line, the waterproof board is cut by a cutting machine. The cutting depth is 300mm at a time, and the upper and lower steel bars of the waterproof board are cut together. When cutting, cut along the positioning line to avoid deviation. Use an infrared horizontal line and the controller of the cutting machine to control the cutting depth to ensure the depth requirements.

[0024] 2. After the dark groove 6 is chiseled and cleaned, the PVC water collecting pipe 3 is placed in the dark groove 6. 10mm holes are punched around the water collecting pipe 3, and water collecting holes 31 are set to ensure that the accumulated water in the dark groove flows into the pipe and is discharged to the drainage ditch or water collecting pit by the water collecting pipe 3. After the water collecting pipe 3 is installed, adjust the water pipe elevation. The water collecting pipe is installed according to the slope of the bottom of the dark groove, and the water collecting pipe is connected in sections using PVC joints.

[0025] 3. After the water collecting pipe 3 is installed, fill the surroundings of the water collecting pipe 3 with gravel 4. After the gravel is filled, lay the polypropylene cloth 2 on the upper part, the width of which is the width of the hidden groove 6.

[0026] 4. After the gravel 4 in the hidden groove 6 and the polypropylene cloth 2 are laid, the drainage in the groove is observed. If there is no water overflow, it means that the water-repellent effect is achieved. The steel bars on the upper part of the waterproof board are connected by welding. After the steel bar welding is completed, the concrete strength level is increased by one level when the hidden groove 6 is closed, and the newly poured diluted concrete 1 with impermeable fine stone not less than P8 grade is poured. After the pouring is completed, it is restored to the waterproof board ground.

[0027] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A raft foundation superimposed replacement layer seepage buried drainage trough, characterized in that: It comprises a waterproof board, a dark groove is arranged on the waterproof board, a water collecting pipe is arranged in the dark groove, a plurality of water collecting holes are arranged on the water collecting pipe, a crushed stone layer is arranged around the dark groove and the water collecting pipe, and a concrete layer is laid on the top of the dark groove.

2. The raft foundation superimposed replacement layer seepage buried drainage trough according to claim 1, characterized in that: The water collecting pipe is a PVC water collecting pipe.

3. The raft foundation superimposed replacement layer seepage buried drainage trough according to claim 1, characterized in that: A waterproof layer is arranged between the concealed groove and the concrete layer.

4. The raft foundation superimposed replacement layer seepage buried drainage trough according to claim 3, characterized in that: The waterproof layer is a polypropylene cloth, the width of the polypropylene cloth is consistent with the width of the hidden groove, and the polypropylene cloth is located above the water collecting pipe and the gravel layer.

5. The raft foundation superimposed replacement layer seepage buried drainage trough according to claim 4, characterized in that: Steel bars are arranged between the polypropylene cloth and the concrete layer.

6. The raft foundation superimposed replacement layer seepage buried drainage trough according to claim 5, characterized in that: The concrete layer is T-shaped after pouring.

7. The raft foundation superimposed replacement layer seepage buried drainage trough according to claim 1, characterized in that: The water collecting pipe is placed in the dark groove in an inclined state.

8. The raft foundation superimposed replacement layer seepage buried drainage trough according to claim 7, characterized in that: The slope of the water collecting pipe is 0.5%.

9. The raft foundation superimposed replacement layer seepage buried drainage trough according to claim 2, characterized in that: The water collection hole is a 10 mm hole.

10. The raft foundation superimposed replacement layer seepage buried drainage trough according to claim 1, characterized in that: The gravel layer uses gravel with a diameter of 10-20 mm.

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