Anti-floating pile drainage structure in underground building structure
By adopting a water-release structure in underground buildings and using the design of water discharge channels and water collection wells, the problems of bottom plate cracking and waterproof failure caused by groundwater level rise are solved, and the strength and waterproof performance of building floor plates are improved.
Patent Information
- Application Number
- CN202422039018.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-08-22
AI Technical Summary
In the prior art, the base plates of underground buildings are prone to cracking and waterproof failure due to the rise of groundwater levels.
The anti-floating pile water leakage structure is adopted, including the setting of anti-floating piles in the underground building structure, and a water leakage channel is provided in the anti-floating piles. The water leakage channel is connected to the groundwater level and is connected to the collecting well externally, combining the design of filtered water gravel and slightly expanded high-strength concrete.
The strength of the building floor is effectively improved, and the design of the water discharge channel solves the problems of floor cracks and waterproof failure caused by the rise of groundwater level.
Smart Images
Figure CN222975950U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of anti - floating construction for basements. Background Art
[0002] In building structures such as basements, underground garages, and squares, there are anti - floating design requirements. Common anti - floating measures include increasing counterweights, adding anti - floating anchor rods and anti - floating piles, or opening holes in the floor slab or exterior wall for drainage. Among them, draining water by opening holes in the floor slab is to drain water by making secondary holes in the floor slab after the building structure shows a floating phenomenon, which will damage the waterproofing of the floor slab and reduce the comprehensive performance of the floor slab.
[0003] Those skilled in the art of this technology are committed to researching and developing a new structure for anti - floating design by combining anti - floating piles and drainage holes. Summary of the Utility Model
[0004] In order to solve the deficiencies of the prior art, the utility model provides an anti - floating pile drainage structure in an underground building structure, which solves the problems of easy cracking of the floor slab of underground buildings and waterproof failure caused by the rising of the groundwater level in the prior art.
[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:
[0006] The anti - floating pile drainage structure in an underground building structure includes an underground building structure and anti - floating piles. It is characterized in that the underground building structure has a sump, a drainage facility is arranged in the sump, the underground building structure from top to bottom is successively a surface layer, a reinforced concrete layer, a waterproof layer, and a plain concrete cushion layer. The anti - floating piles are arranged in the clay layer below the floor slab, the anti - floating piles are wet - connected to the plain concrete cushion layer, a drainage channel is arranged in the anti - floating piles, and the drainage channel communicates with the groundwater level and is externally connected to the sump.
[0007] Furthermore, the anti - floating pile includes an anchor rod, a support frame, an outer pipe, an inner pipe, mortar grouting, and filter gravel. Among them, the anchoring combination body composed of the anchor rod and the support frame is located in the pile hole, and the outer pipe and the inner pipe are sleeved and installed in the anchoring combination body. The inner pipe is provided with water - permeable holes, filter gravel is arranged in the space between the inner pipe and the outer pipe, and mortar grouting is arranged in the annular space between the outer pipe and the pile hole.
[0008] Furthermore, the pile head structure of the anti - floating pile is: the anchor rod at the pile head part has a bend, the part where the bend is located is wet - connected to the plain concrete cushion layer, and micro - expanded high - strength concrete is arranged in the annular space between the inner pipe and the outer pipe at the pile head part.
[0009] Furthermore, the inner pipe and the outer pipe pass through the plain concrete cushion layer and the waterproof layer and enter the reinforced concrete layer, and the inner pipe turns and connects to the sump in the reinforced concrete layer to form a drainage channel.
[0010] Further, the upper end of the outer pipe is located within the plain concrete cushion layer, the inner pipe passes through the plain concrete cushion layer and the waterproof layer and enters the reinforced concrete layer, and the inner pipe turns and connects to the sump within the reinforced concrete layer, forming a drainage channel.
[0011] Further, the inner pipe and the outer pipe are PVC drain pipes.
[0012] Optimized solution: The anti-floating pile includes a spiral stirring steel pipe, an inner pipe, mortar grouting, and filter water gravel. Among them, the spiral stirring steel pipe is located within the pile hole, and an inner pipe is arranged within the spiral stirring steel pipe. The inner pipe has water permeable holes. Filter water gravel is provided within the space between the spiral stirring steel pipe and the inner pipe, and concrete is provided within the space between the spiral stirring steel pipe and the pile hole.
[0013] Further, the pile head structure of the anti-floating pile is: a flange is provided at the upper end of the spiral stirring steel pipe at the pile head portion, and a wet connection is made between this flange and the plain concrete cushion layer. Micro-expansion high-strength concrete is provided within the annular space between the inner pipe and the spiral stirring steel pipe at the pile head portion.
[0014] Further, the inner pipe passes through the plain concrete cushion layer and the waterproof layer and enters the reinforced concrete layer, and the inner pipe turns and connects to the sump within the reinforced concrete layer, forming a drainage channel.
[0015] Further, the inner pipe is a PVC drain pipe.
[0016] The beneficial effects of the present utility model are:
[0017] In this technical solution, the presence of the anti-floating pile effectively improves the strength of the building floor slab, and in combination with the design of the drainage channel, it well solves the problems of floor slab cracking and waterproof failure caused by the rising of the groundwater level. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is the first implementation structure of the present utility model.
[0019] Figure 2 It is the second implementation structure of the present utility model.
[0020] Figure 3 It is Figure 1 the approximate implementation solution of
[0021] In the figure:
[0022] 10 Underground building structure, 11 Surface layer, 12 Reinforced concrete layer, 13 Waterproof layer, 14 Plain concrete cushion layer, 15 Sump
[0023] 20 Anti-floating piles, 21 Anchor rods, 22 Support frames, 23 Outer pipes, 24 Inner pipes, 25 Mortar grouting, 26 Filtered gravel, 27 Wet connection, 28 Micro-expansion high-strength concrete, 29 Helical stirring steel pipes. Specific implementation manners
[0024] The anti-floating pile water drainage structure in an underground building structure includes an underground building structure, anti-floating piles, and a water drainage channel. Among them, the underground building structure is represented by a common building floor slab in a basement, the anti-floating piles are represented by anchor rod anti-floating piles, and the water drainage channel is arranged in the above-mentioned anti-floating piles, communicates with the groundwater level in the clay layer, and is externally discharged into the drainage trench or sump in the basement, so as to balance the restriction of the water level in the clay under the building floor slab. The following combines the attached Figure 1 The structure, principle, and construction of the present utility model are elaborated in detail to facilitate a full understanding of this innovation.
[0025] Underground building structure, refer to Figure 1 , in this embodiment, a common foundation structure is taken as an example. This underground building structure has a sump structure, and drainage facilities such as drainage pumps are arranged in the sump. The underground building structure 10 from top to bottom is successively a surface layer 11, a reinforced concrete layer 12, a waterproof layer 13, and a plain concrete cushion 14. Among them, the thickness of the reinforced concrete layer is not less than 20 cm, and the internal steel bars are not shown in the figure.
[0026] The sump 15 is arranged in the underground building structure 10, and the design of deepening the pouring at the position of the sump is carried out to ensure the strength of this position, and it is shown as a trapezoidal part in Figure 1 .
[0027] The anti-floating piles 20 are arranged in the clay layer under the floor slab, and their depth is not less than 3 m, generally designed to be 5 m - 6 m. The styles of these anti-floating piles are relatively diverse, Figure 1 and only one style of the anti-floating pile design is given in
[0028] Refer to Figure 1 , Style 1. The structural composition of the anti-floating pile 20 is as follows:
[0029] It includes a bolt 21, a support frame 22, an outer pipe 23, an inner pipe 24, a mortar grouting 25, and filter water gravel 26. Among them, the anchoring combination composed of the bolt and the support frame is inserted into the pile hole from top to bottom, and the outer pipe and the inner pipe are sleeved and installed in the anchoring combination. The inner pipe and the outer pipe are made of PVC drain pipes, and a number of water permeable holes are designed on the inner pipe. The quantity, specifications, and arrangement of the water permeable holes can be designed according to actual needs. The above-mentioned inner pipe and outer pipe are arranged concentrically, and the space formed between the two is filled with filter water gravel 26 to form a water permeable space. This annular water permeable space enables water to gather from bottom to top and enter the inner pipe through the water permeable holes, reducing the water pressure and water level of the groundwater. Grouting construction is carried out in the annular space between the outer pipe and the pile hole, that is, a mortar grouting 25 is formed. After the mortar grouting solidifies, it forms a rigid main body integrated with the above-mentioned bolt and support frame, which is the main body of the anti-floating pile.
[0030] Furthermore, the pile head structure of the above anti-floating pile is as follows: the bolt 21 at the pile head part is bent 90 degrees to form an L shape, and secondary pouring of concrete is carried out between the bent part and the plain concrete cushion to complete the wet connection 27. The wet connection part is enlarged in volume to form the pile head, and micro-expansion high-strength concrete 28 is poured into the annular space between the inner pipe and the outer pipe at the pile head part, so that the space between the inner pipe and the outer pipe forms a waterproof seal here, enabling the water of the groundwater level to only drain out through the inner pipe.
[0031] The inner pipe and the outer pipe pass through the above-mentioned plain concrete cushion and waterproof layer and enter the reinforced concrete layer, and the inner pipe turns and connects to the catch basin in the reinforced concrete layer.
[0032] Furthermore, in the alternative solution, referring to Figure 3 , the upper end of the above-mentioned outer pipe is located in the plain concrete cushion, that is, only the inner pipe passes through the above-mentioned plain concrete cushion and waterproof layer and enters the reinforced concrete layer, and the inner pipe turns and connects to the catch basin in the reinforced concrete layer. The above-mentioned anti-floating pile with special design constitutes a water drainage channel.
[0033] In this embodiment, the path of the groundwater drainage channel is: clay layer, filter water gravel, inner pipe water permeable holes, inner pipe, catch basin. Through the above path, the drainage of groundwater is realized, thus solving the anti-floating design.
[0034] In this embodiment, by setting the water drainage path in the anti-floating pile, while ensuring the stable operation of the anti-floating pile, the purpose of draining water outward is realized, that is, the combination of a rigid anti-floating pile and water drainage.
[0035] Referring to Figure 2 , Style 1, the structural composition of the anti-floating pile is as follows:
[0036] It includes a spiral stirring steel pipe 29, an inner pipe 24, mortar grouting 25, and filter gravel 26. Among them, the spiral stirring steel pipe is inserted into the pile hole in a top-down stirring manner, and an inner pipe is sleeved and installed inside the spiral stirring steel pipe. The inner pipe 24 is a PVC drainage pipe, and a number of water-permeable holes are designed on the inner pipe. The quantity, specifications, and arrangement of the water-permeable holes can be designed according to actual needs. Filter gravel is filled in the space formed between the spiral stirring steel pipe and the inner pipe to form a water-permeable space. This annular water-permeable space enables water to gather from bottom to top and enter the inner pipe through the water-permeable holes, reducing the water pressure and water level of the groundwater. The outer side of the spiral stirring steel pipe is provided with a spiral structure, and concrete is filled in the annular space between the steel pipe and the pile hole, that is, an anchorage is formed, which is the main body of the anti-floating pile.
[0037] Furthermore, the pile head structure of the above anti-floating pile is as follows: at the upper end of the spiral stirring steel pipe 29 at the pile head part, there is a flange plate. Secondary pouring of concrete is carried out between this flange plate and the plain concrete cushion to complete the wet connection 27. The volume of this wet connection part is enlarged to form the pile head. And micro-expansion high-strength concrete 28 is poured into the annular space between the inner pipe and the spiral stirring steel pipe at this pile head part, so that the space between the inner pipe and the steel pipe forms a waterproof seal here, enabling the water of the groundwater level to only drain out through the inner pipe. The above inner pipe passes through the plain concrete cushion and the waterproof layer and enters the reinforced concrete layer, and the inner pipe is turned and connected to the catch basin in the reinforced concrete layer.
[0038] In this embodiment, the drainage path of the groundwater drainage channel is: clay layer, filter gravel, inner pipe water-permeable holes, inner pipe, catch basin. Through the above path, the drainage of groundwater is realized, thus solving the anti-floating design.
[0039] The above two types of anti-floating piles are representative and both achieve the effective combination of the anti-floating pile and the drainage channel, with the dual functions of anti-floating and drainage. Within the foreseeable future, the design of any type of anti-floating pile and drainage channel should fall within the protection scope of this technology.
[0040] By setting an inner pipe with a water-permeable structure in the anti-floating pile and supplemented with filter gravel, the goal of quickly discharging and draining groundwater when the groundwater level is high is achieved, which is beneficial to reducing the extrusion and uplift of the bottom plate in the underground building structure caused by the rising groundwater level, ensuring the safety of the building and improving the building life.
[0041] The above-described embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those skilled in the relevant art to the present invention should all fall within the protection scope determined by the claims of the present invention.
Claims
1. An anti-floating pile drainage structure in an underground building structure, comprising an underground building structure and anti-floating piles, characterized in that: The underground building structure has a water collection well, and drainage facilities are arranged in the water collection well. The underground building structure consists of a surface layer, a reinforced concrete layer, a waterproof layer and a plain concrete cushion layer from top to bottom. Anti-floating piles are arranged in the clay layer below the bottom plate. The anti-floating piles are wet-connected with the plain concrete cushion layer. A drainage channel is arranged in the anti-floating piles, and the drainage channel is connected to the groundwater level and is externally connected to the water collection well.
2. The anti-floating pile drainage structure in the underground building structure according to claim 1, characterized in that: The anti-floating pile includes an anchor rod, a support frame, an outer tube, an inner tube, mortar grouting, and water-filtering gravel, wherein an anchoring assembly consisting of the anchor rod and the support frame is located in the pile hole, and the outer tube and the inner tube are sleeved and installed in the anchoring assembly, the inner tube is provided with a water-permeable hole, water-filtering gravel is arranged in the space between the inner tube and the outer tube, and mortar grouting is arranged in the annular space between the outer tube and the pile hole.
3. The anti-floating pile drainage structure in the underground building structure according to claim 2, characterized in that: The pile head structure of the anti-floating pile is as follows: the anchor rod at the pile head is bent, the bent part is wet-connected with the plain concrete cushion layer, and the annular space between the inner tube and the outer tube at the pile head is filled with micro-expansion high-strength concrete.
4. The anti-floating pile drainage structure in the underground building structure according to claim 3, characterized in that: The inner pipe and the outer pipe pass through the plain concrete cushion layer and the waterproof layer and enter into the reinforced concrete layer, and the inner pipe turns inside the reinforced concrete layer and is connected to the water collection well to form a drainage channel.
5. The anti-floating pile drainage structure in the underground building structure according to claim 3, characterized in that: The upper end of the outer pipe is located in the plain concrete cushion layer, the inner pipe passes through the plain concrete cushion layer and the waterproof layer and enters the reinforced concrete layer, and the inner pipe turns inside the reinforced concrete layer and is connected to the water collection well to form a drainage channel.
6. The anti-floating pile drainage structure in the underground building structure according to claim 2, characterized in that: The inner pipe and the outer pipe are PVC drainage pipes.
7. The anti-floating pile drainage structure in the underground building structure according to claim 1, characterized in that: The anti-floating pile includes a spiral stirring steel pipe, an inner pipe, mortar grouting, and water-filtering gravel, wherein the spiral stirring steel pipe is located in the pile hole, and the inner pipe is arranged inside the spiral stirring steel pipe, the inner pipe has a water-permeable hole, the space between the spiral stirring steel pipe and the inner pipe has water-filtering gravel, and the space between the spiral stirring steel pipe and the pile hole is arranged with concrete.
8. The anti-floating pile drainage structure in the underground building structure according to claim 7, characterized in that: The pile head structure of the anti-floating pile is as follows: a flange is provided at the upper end of the spiral stirring steel pipe at the pile head, the flange is wet-connected with the plain concrete cushion layer, and micro-expansion high-strength concrete is provided in the annular space between the inner pipe at the pile head and the spiral stirring steel pipe.
9. The anti-floating pile drainage structure in the underground building structure according to claim 7, characterized in that: The inner pipe passes through the plain concrete cushion layer and the waterproof layer and enters the reinforced concrete layer, and the inner pipe turns inside the reinforced concrete layer and is connected to the water collection well to form a water discharge channel.
10. The anti-floating pile drainage structure in the underground building structure according to claim 7, characterized in that: The inner pipe is a PVC drainage pipe.