Deep foundation waterproof and anti-seepage structure and construction method thereof

Abstract

The deep foundation waterproof and anti-seepage structure comprises a plurality of partition plates and waterproof layers, the partition plates surround the peripheries of a plurality of pile foundations to form a cutoff wall with the same range as the foundations, the pile foundations are located below the foundations, and the waterproof layers are laid on the inner surfaces and the outer surfaces of the partition plates; the partition plate is formed by splicing a plurality of waterproof baffles, a plurality of cavities are formed in the waterproof baffles, water inlets are formed in the outer sides of the waterproof baffles, the water inlets are communicated with the cavities, and water pumping pipes are installed in the cavities. The waterproof baffles are installed around the foundation, so that a waterproof wall is formed, and underground water around the foundation is prevented from permeating into the position below the foundation. Meanwhile, redundant underground water in surrounding soil can be collected by the water-proof baffle, and the redundant underground water is pumped out to the ground through the drainage system to be treated, so that the soil environment is fundamentally improved, foundation settlement is prevented, and the safety of the foundation and overground buildings is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of building waterproof construction, and particularly relates to a deep foundation waterproof and anti-seepage structure and a construction method thereof. Background Art

[0002] Deep foundations are usually used in heavy structures such as high-rise buildings, bridges, ports and tunnels, but they often face the challenge of groundwater leakage under high water levels and highly permeable geological conditions. In the existing deep foundation construction methods, although conventional waterproofing measures (such as waterstops) are adopted, the effect is limited. Especially under high water pressure or complex geological conditions, the waterproofing system is prone to leakage, affecting the durability and safety of the structure. Therefore, there is an urgent need for a more complete waterproof and anti-seepage deep foundation system to enhance the groundwater protection effect and extend the service life of the structure. Summary of the invention

[0003] The main technical problem solved by the present invention is to provide a deep foundation waterproof and anti-seepage structure and its construction method, by installing a waterproof baffle around the foundation to form a waterproof wall to prevent groundwater around the foundation from seeping into the foundation. At the same time, the waterproof baffle can also collect excess groundwater in the surrounding soil, and pump the excess groundwater out to the ground for treatment through the drainage system, fundamentally improving the soil environment, preventing foundation settlement, and ensuring the safety of the foundation and the above-ground buildings.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is: a deep foundation waterproof and anti-seepage structure, comprising a plurality of partitions and a waterproof layer, wherein the partitions are arranged around the periphery of a plurality of pile foundations to form a water-retaining wall having the same scope as the foundation, the pile foundations are located below the foundations, and the inner and outer surfaces of the partitions are paved with a waterproof layer;

[0005] The partition is composed of several waterproof baffles, and several cavities are arranged inside the waterproof baffle. A water inlet is arranged on the outside of the waterproof baffle, and the water inlet is connected with the cavity. A pumping pipe is installed in the cavity. When the precipitation increases, the soil where the foundation is located will not directly penetrate into the ground due to the shelter of the building, but the soil outside the foundation will be affected by the rainfall, resulting in an increase in the water content of the soil around the foundation. For foundations without waterproof baffles, the accumulated water in the soil around the foundation will seep into the soil under the foundation, causing the moisture content of the soil under the foundation to increase. In severe cases, it may cause foundation settlement and thus cause engineering accidents. For foundations with waterproof baffles, water cannot penetrate into the soil where the foundation is located, thereby ensuring the safety of the foundation and above-ground buildings. A cavity is left in the middle of the waterproof baffle, and a water inlet is reserved at the lower end. Therefore, the moisture in the soil can flow into the cavity in the middle of the waterproof baffle through the water inlet, so that the underground accumulated water can be pumped out to the ground through a pumping pipe. Treating the accumulated water can reduce the soil moisture content and fundamentally improve the soil environment.

[0006] Furthermore, the partitions are provided with a card slot and a card strip on opposite sides thereof, respectively, and adjacent partitions are spliced ​​together by the card strips being engaged in the card slots.

[0007] Furthermore, the bottoms of adjacent cavities are connected via a connecting hole, and the cavity is a cavity opening upward.

[0008] Furthermore, the water inlet end of the lowest end of the water pumping pipe is lower than the water inlet.

[0009] Furthermore, the water inlet is composed of a plurality of small holes.

[0010] Furthermore, the connection between the card slot and the card strip is coated with waterproof paint or affixed to both sides with waterproof cloth, and waterproof cloth is laid on the inner and outer sides of the connection between adjacent partitions, and the waterproof cloth is located between the partition and the waterproof layer.

[0011] The present invention also provides a construction method of a deep foundation waterproof and anti-seepage structure, comprising the following steps:

[0012] S1: Determine the scope of foundation construction and dig trenches downward around the boundaries of the foundation. The depth of the trenches must be deeper than the buried depth of the pile foundation.

[0013] S2: Waterproof baffles are buried in the excavated trench. The waterproof baffles need to be tightly connected through slots and strips to form a waterproof wall with the same scope as the foundation;

[0014] The specific process is: after the first waterproof baffle is installed in the pre-dug trench, the second waterproof baffle is installed. After the two waterproof baffles are connected through the slots and strips, the next one is installed, and the installation is completed in sequence, so that the baffles are installed and the baffles form a waterproof wall equal to the foundation range around the pile foundation. When installing, it should be noted that the side with the water inlet faces outward to block and collect the soil moisture outside the foundation and prevent it from entering the soil in the area where the pile foundation is located. The subsequent foundation can be directly located on the waterproof wall formed by the waterproof baffle, which will make the waterproof wall have a certain support effect on the foundation and further prevent the foundation from sinking.

[0015] S3: A waterproof layer is laid on the inner and outer surfaces of the water-blocking wall formed by the water-blocking baffle, and at the same time, it is necessary to ensure that the water inlet on the outer surface of the water-blocking baffle is not blocked; the water inlet needs to be reserved. When laying a waterproof layer on the outer surface of the water-blocking baffle, the water inlet needs to be left empty to facilitate external accumulated water to enter the internal cavity of the water-blocking baffle, and prevent accumulated water from entering the soil where the foundation is located;

[0016] The specific process is as follows: After the waterproof wall is installed, waterproof materials are used to protect the inner and outer surfaces of the waterproof wall. During the treatment process, it is necessary to focus on the connection slot area between each waterproof baffle and the water inlet of each waterproof baffle. It is necessary to ensure that the connection slot area between each waterproof baffle is sealed while leaving the water inlet area of ​​each waterproof baffle to facilitate the infiltration of moisture in the soil into the water cavity. There are multiple partitions in each waterproof baffle to improve the bearing capacity of the waterproof baffle. A water cavity is formed between each partition. There is a connecting hole at the bottom of each partition so that the accumulated water in each water cavity can circulate with each other. In the subsequent drainage, each waterproof baffle only needs one drainage pipe to drain all the accumulated water in the waterproof baffle.

[0017] S4: Install a water extraction pipe in the cavity area of ​​each water-blocking baffle, and the lowest end of the water extraction pipe must be lower than the water inlet on the outer surface of the water-blocking baffle;

[0018] The specific process is: after the treatment of the waterproof wall formed by the waterproof baffle is completed, a drainage pipe needs to be inserted downward from the opening at the upper end of each waterproof baffle. When laying the drainage pipe, the drainage outlet at the lowest end of the pumping pipe needs to be lower than the water inlet on the outer surface of the waterproof baffle and inserted into the bottom of the water cavity to ensure that all the accumulated water in the water cavity can be discharged, thereby reducing the overall soil moisture content to improve the soil environment under the foundation.

[0019] S5: Backfill the trench soil and start deep foundation construction. After the drainage pipe is installed, the trench soil needs to be backfilled and compacted to stabilize the water-blocking wall formed by the water-blocking baffle. After that, the foundation can be constructed according to the construction requirements. However, it is necessary to reserve the drainage outlet of the drainage pipe so that the drainage pipe can smoothly discharge the accumulated water in the water-blocking cavity to the ground, thereby treating the underground water and preventing it from damaging the underground soil environment and causing engineering accidents.

[0020] Furthermore, in step S1, the trench depth needs to be slightly deeper than the buried depth of the pile foundation, which can ensure that underground seepage can be blocked outside the soil range where the pile foundation is located by the subsequently installed retaining wall. The bottom of the retaining wall is lower than the bottom of the pile foundation, ensuring that the pile foundation is in a good environment.

[0021] Furthermore, in step S2, the connecting parts of the card slots and card strips between the waterproof baffles need to be coated with waterproof paint or affixed to both sides with waterproof cloth, and waterproof cloth is laid on the inner and outer sides of the connection between adjacent baffles to prevent water from seeping from the external soil from entering the internal soil of the foundation through the gaps.

[0022] Furthermore, in step S3, the water inlet is composed of a plurality of small holes, thereby preventing soil from entering the internal cavity of the waterproof baffle through the water inlet.

[0023] The beneficial effects of the present invention include at least the following points:

[0024] The partition of the present invention surrounds the periphery of a plurality of pile foundations to form a waterproof wall with the same scope as the foundation. The pile foundation is located below the foundation, and the inner and outer surfaces of the partition are paved with a waterproof layer. When the precipitation increases, the soil where the foundation is located will not directly penetrate into the ground due to the shelter of the building, but the soil outside the foundation will be affected by the rainfall, resulting in an increase in the water content of the soil around the foundation. For a foundation without a waterproof baffle, the accumulated water in the soil around the foundation will seep into the soil under the foundation, causing the moisture content of the soil under the foundation to increase. In severe cases, it may cause foundation settlement and thus cause an engineering accident. For a foundation with a waterproof baffle, the moisture cannot penetrate into the soil where the foundation is located, thereby ensuring the safety of the foundation and the above-ground buildings. It is worth mentioning that the baffle is made up of several waterproof baffles spliced ​​together, and the interior of the waterproof baffle is provided with several cavities. The outer side of the waterproof baffle is provided with a water inlet, which is connected to the cavity, and a pumping pipe is installed inside the cavity. A cavity is left in the middle of the waterproof baffle, and a water inlet is reserved at the lower end. Therefore, the moisture in the soil can flow into the cavity in the middle of the waterproof baffle through the water inlet, so that the underground accumulated water can be pumped out to the ground through the pumping pipe. Treating the accumulated water can reduce the soil moisture content and fundamentally improve the soil environment.

[0025] The connection between the card slot and the card strip of the waterproof baffle of the present invention is coated with waterproof paint or tightly covered with waterproof cloth, and waterproof cloth is provided on the inner and outer sides of the connection between adjacent partitions to prevent external soil from seeping into the internal soil of the foundation through the gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a construction flow chart of the deep foundation waterproof and anti-seepage structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the water-blocking baffle of the present invention;

[0029] Figure 4 The present invention Figure 3 A magnified view of point A;

[0030] Figure 5 The present invention Figure 3 The enlarged view of point B;

[0031] Figure 6 is a cross-sectional view of a water-blocking baffle of the present invention;

[0032] Figure 7 The present invention Figure 6 The enlarged view of point C;

[0033] Figure 8It is a schematic diagram of the installation of the water-blocking wall and the waterproof cloth of the present invention;

[0034] The parts in the accompanying drawings are marked as follows:

[0035] 1. Pile foundation; 2. Foundation; 3. Water-blocking baffle; 31. Cavity; 32. Water inlet; 33. Slot; 34. Strip; 35. Through hole; 36. Partition; 4. Waterproof cloth. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0037] Embodiment: A deep foundation waterproof and anti-seepage structure, such as Figure 2 As shown, it includes several partitions and waterproof layers, the partitions are surrounded by the periphery of several pile foundations 1 to form a water-retaining wall with the same range as the foundation 2, the pile foundation 1 is located below the foundation 2, and the inner and outer surfaces of the partitions are paved with waterproof layers;

[0038] In this embodiment, the waterproof layer is a waterproof cloth, and the pile foundation is preferably a reinforced concrete pile foundation;

[0039] The partition is composed of several water-proof baffles 3. Figure 6 The waterproof baffle 3 is provided with a plurality of cavities 31 inside, and the waterproof baffle 3 is provided with a water inlet 32 ​​outside. The water inlet 32 ​​is connected with the cavity 31, and the cavity 31 is installed with a water pump.

[0040] like Figure 3 He Ru Figure 4 As shown, a clamping groove 33 and a clamping strip 34 are respectively provided on opposite sides of the partition, and adjacent partitions are spliced ​​by clamping the clamping strip 34 in the clamping groove 33.

[0041] During specific implementation, the card slot is a T-shaped card slot, so that the card connection between adjacent partitions is more stable.

[0042] like Figure 7 As shown, the bottoms of adjacent cavities 31 are connected via a connecting hole 35, and the cavity 31 is a cavity opening upward.

[0043] The water inlet end of the lowest end of the water pumping pipe is lower than the water inlet 32. In this embodiment, the water inlet is located at the lower part of the side wall of the water-blocking baffle, and the bottom of the cavity is lower than the water inlet. Therefore, when the water pumping pipe is installed, the lowest end of the water pumping pipe is lower than the water inlet.

[0044] like Figure 5 As shown, the water inlet 32 ​​is composed of a plurality of small holes.

[0045] The connection between the card slot 33 and the card strip 34 is coated with waterproof paint or a waterproof cloth 4 is pasted on both sides. Figure 8 As shown, waterproof cloth 4 is laid on the inner and outer sides of the connection between adjacent partitions, and the waterproof cloth 4 is located between the partition and the waterproof layer. In specific implementation, the waterproof coating is a polymer waterproof coating, and the waterproof cloth is a polyvinyl chloride (PVC) waterproof membrane, asphalt waterproof membrane, self-adhesive waterproof membrane or rubber waterstop, but not limited to the following. Any coating or cloth that can play a waterproof role will do, and the soil pressure is used to make the waterproof layer and the waterproof baffle fit tightly.

[0046] The present invention also provides a construction method for a deep foundation waterproof and anti-seepage structure, such as Figure 1 As shown, the following steps are included:

[0047] S1: Determine the scope of foundation construction, dig trenches downwards around the foundation, and the depth of the trenches must be deeper than the buried depth of the pile foundation. This ensures that underground seepage can be blocked by the subsequently installed retaining wall outside the soil range where the pile foundation is located. The bottom of the retaining wall is lower than the bottom of the pile foundation, ensuring that the pile foundation is in a good environment.

[0048] S2: Waterproof baffles are buried in the excavated trench. The waterproof baffles need to be tightly connected through slots and strips to form a waterproof wall with the same scope as the foundation;

[0049] The specific process is: after the first waterproof baffle is installed in the pre-dug trench, the second waterproof baffle is installed. After the two waterproof baffles are connected through the slots and strips, the next one is installed, and the installation is completed in sequence, so that the baffles are installed and the baffles form a waterproof wall equal to the foundation range around the pile foundation. When installing, it should be noted that the side with the water inlet faces outward to block and collect the soil moisture outside the foundation and prevent it from entering the soil in the area where the pile foundation is located. The subsequent foundation can be directly located on the waterproof wall formed by the waterproof baffle, which will make the waterproof wall have a certain support effect on the foundation and further prevent the foundation from sinking.

[0050] In step S2, the connecting parts of the card slots and card strips between the waterproof baffles need to be coated with waterproof paint or affixed to both sides with waterproof cloth, and waterproof cloth is laid on the inner and outer sides of the connection between adjacent baffles to prevent water from seeping from the external soil into the internal soil of the foundation through the gaps.

[0051] S3: A waterproof layer is laid on the inner and outer surfaces of the water-blocking wall formed by the water-blocking baffle, and at the same time, it is necessary to ensure that the water inlet on the outer surface of the water-blocking baffle is not blocked; the water inlet needs to be reserved. When laying a waterproof layer on the outer surface of the water-blocking baffle, the water inlet needs to be left empty to facilitate external accumulated water to enter the internal cavity of the water-blocking baffle, and prevent accumulated water from entering the soil where the foundation is located;

[0052] In step S3, the water inlet is composed of a plurality of small holes, thereby preventing soil from entering the internal cavity of the waterproof baffle through the water inlet.

[0053] The specific process is as follows: After the waterproof wall is installed, waterproof materials are used to protect the inner and outer surfaces of the waterproof wall. During the treatment process, it is necessary to focus on the connection slot area between each waterproof baffle and the water inlet of each waterproof baffle. It is necessary to ensure that the connection slot area between each waterproof baffle is sealed while leaving the water inlet area of ​​each waterproof baffle to facilitate the infiltration of moisture in the soil into the water cavity. Figure 6 As shown, there are multiple partitions 36 in each waterproof baffle to improve the bearing capacity of the waterproof baffle. Water accumulation cavities are formed between each partition. There are connecting holes at the bottom of each partition to allow the accumulated water in each water accumulation cavity to flow through each other. During subsequent drainage, each waterproof baffle only needs one drain pipe to drain all the accumulated water in the waterproof baffle.

[0054] S4: Install a water extraction pipe in the cavity area of ​​each water-blocking baffle, and the lowest end of the water extraction pipe must be lower than the water inlet on the outer surface of the water-blocking baffle;

[0055] The specific process is: after the treatment of the waterproof wall formed by the waterproof baffle is completed, a drainage pipe needs to be inserted downward from the opening at the upper end of each waterproof baffle. When laying the drainage pipe, the drainage outlet at the lowest end of the pumping pipe needs to be lower than the water inlet on the outer surface of the waterproof baffle and inserted into the bottom of the water cavity to ensure that all the accumulated water in the water cavity can be discharged, thereby reducing the overall soil moisture content to improve the soil environment under the foundation.

[0056] S5: Backfill the trench soil and start deep foundation construction. After the drainage pipe is installed, the trench soil needs to be backfilled and compacted to stabilize the water-blocking wall formed by the water-blocking baffle. After that, the foundation can be constructed according to the construction requirements. However, it is necessary to reserve the drainage outlet of the drainage pipe so that the drainage pipe can smoothly discharge the accumulated water in the water-blocking cavity to the ground, thereby treating the underground water and preventing it from damaging the underground soil environment and causing engineering accidents.

[0057] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A deep foundation waterproof and anti-seepage structure, characterized by: It comprises a plurality of partitions and a waterproof layer, wherein the partitions surround a plurality of pile foundations (1) to form a watertight wall having the same range as the foundation (2), the pile foundations are located below the foundation, and the inner and outer surfaces of the partitions are paved with a waterproof layer; The partition is formed by splicing a plurality of water-blocking baffles (3), a plurality of cavities (31) are provided inside the water-blocking baffle, a water inlet (32) is provided on the outside of the water-blocking baffle, the water inlet is connected to the cavity, and a water pump is installed in the cavity.

2. The deep foundation waterproof and anti-seepage structure according to claim 1 is characterized by: A clamping groove (33) and a clamping strip (34) are respectively provided on opposite sides of the partition, and adjacent partitions are spliced ​​by clamping the clamping strips in the clamping grooves.

3. The deep foundation waterproof and anti-seepage structure according to claim 1, characterized in that: The bottoms of adjacent cavities are connected via a connecting hole (35), and the cavity is a cavity opening upward.

4. The deep foundation waterproof and anti-seepage structure according to claim 1, characterized in that: The water inlet end of the lowest end of the water pumping pipe is lower than the water inlet.

5. The deep foundation waterproof and anti-seepage structure according to claim 1, characterized in that: The water inlet is composed of a plurality of small holes.

6. The deep foundation waterproof and anti-seepage structure according to claim 2 is characterized by: The connection between the card slot and the card strip is coated with waterproof paint or is pasted on both sides with waterproof cloth, and waterproof cloth (4) is laid on the inner and outer sides of the connection between adjacent partitions, and the waterproof cloth is located between the partition and the waterproof layer.

7. A construction method for a deep foundation waterproof and anti-seepage structure according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: Determine the scope of foundation construction and dig trenches downward around the boundaries of the foundation. The depth of the trenches must be deeper than the buried depth of the pile foundation. S2: Waterproof baffles are buried in the excavated trenches. The baffles need to be tightly connected through slots and strips to form a water-proof wall with the same range as the foundation. S3: A waterproof layer is laid on the inner and outer surfaces of the water-blocking wall formed by the water-blocking baffle, and at the same time, it is necessary to ensure that the water inlet on the outer surface of the water-blocking baffle is not blocked. S4: A suction pipe is installed in the cavity area of ​​each waterproof baffle, and the lowest end of the suction pipe must be lower than the water inlet on the outer surface of the waterproof baffle. S5: Backfill the trench with soil and start deep foundation construction.

8. The construction method of the deep foundation waterproof and anti-seepage structure according to claim 7 is characterized by: In step S1, the trench depth needs to be slightly deeper than the buried depth of the pile foundation, which can ensure that underground water seepage can be blocked outside the soil range where the pile foundation is located by the subsequently installed water-retaining wall.

9. The construction method of the deep foundation waterproof and anti-seepage structure according to claim 7, characterized in that: In step S2, the connecting parts of the card slots and card strips between the waterproof baffles need to be coated with waterproof paint or affixed to both sides with waterproof cloth, and waterproof cloth is laid on the inner and outer sides of the connection between adjacent baffles.

10. The construction method of the deep foundation waterproof and anti-seepage structure according to claim 7, characterized in that: In step S3, the water inlet is composed of a plurality of small holes to prevent soil from entering the internal cavity of the waterproof baffle through the water inlet.

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