Directional drainage system for supporting interlayer water in deep foundation pit

Abstract

The utility model relates to the technical field of foundation pit supporting engineering in building construction, and discloses a deep foundation pit inner supporting interlayer water directional drainage system which comprises a pit, a flow pipe mechanism comprises a plurality of flow guide blind pipes, a directional water guide pipe is connected into a fixing assembly in a sliding mode, and the directional water guide pipe is connected with a drainage pipe. Two masonry water retaining blocks are fixedly connected to the front side, close to the outer portion of the flow guide blind pipe, of the outer portion of the pit, a water drain pipe is fixedly connected to the tops of the two masonry water retaining blocks, one side of the outer portion of the water drain pipe is fixedly connected to the rear side of the outer portion of the flow guide blind pipe, and a drainage ditch is fixedly connected to the top of the pit. According to the utility model, the flow guide blind pipe has water permeability and water collection capacity, underground water can be rapidly collected and guided to the directional water guide pipe through internal pores, the directional water guide pipe ensures that water flow is smoothly conducted to the water drain pipe, the masonry water retaining block effectively prevents the water flow from directly impacting the flow guide blind pipe, and the underground water control device is suitable for underground water control in deep foundation pit construction.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit support engineering technology in building construction, and in particular to a directional drainage system for water between support layers in deep foundation pits. Background Technology

[0002] With the rapid development of urban construction, deep foundation pit projects are increasing. However, in complex underground environments, especially in urban areas with high groundwater levels and varied geological structures, effectively controlling moisture within the foundation pit has become a major challenge. Common water-stopping measures include high-pressure jet grouting and grouting reinforcement. While these methods have achieved good results under specific conditions, due to the diverse soil types (such as gravel and fine sand layers), traditional water-stopping schemes often fail to achieve ideal water-tightness. Furthermore, traditional methods also face problems such as high equipment investment and cumbersome procedures, thus affecting overall construction efficiency and cost control. Therefore, researching more efficient drainage strategies is particularly important.

[0003] A search revealed Chinese Patent Publication No. CN219100282U, which discloses a water collection and resource utilization system for deep foundation pit construction. The system includes: a filling zone; a blind ditch zone located below the filling zone, with a cobblestone layer laid within it, and a collection well within the zone. The upper wall of the collection well is constructed of a steel casing with drainage holes for groundwater to flow into it; a foundation slab layer positioned between the filling zone and the blind ditch zone; and a foundation slab collection well connected to a first pipe and a second pipe. The first pipe connects to the filling zone, and the second pipe is a pumping pipe connected to the collection well. After groundwater is guided by the first and second pipes to the foundation slab collection well for collection and utilization, the hydrostatic pressure at the foundation slab layer decreases, preventing water inrush. This stabilizes the building's bottom structure, reducing the likelihood of seepage, and also allows for the efficient use of collected groundwater, thus conserving water resources.

[0004] However, in practical use, the aforementioned devices have shortcomings. While they connect and integrate the components, they do not take into account soil variations. Furthermore, when facing complex geological conditions and high-intensity operational demands, traditional methods reveal significant limitations—they fail to adequately meet the requirements for rapid response and introduce additional time delays and economic losses. These problems severely impact the smooth progress of the project and the achievement of its economic benefits maximization goals. Therefore, a directional drainage system for interlayer water in deep foundation pit support is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a directional drainage system for water between support layers in deep foundation pits, aiming to improve the problems of poor flexibility, limited adaptability, and low long-term operational reliability of some existing drainage technologies and management models.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A directional drainage system for interlayer water in deep foundation pits includes a pit, a geological structure inside the pit, a flow pipe mechanism on the front side of the pit, and an adjustment mechanism at the bottom of the pit.

[0008] The flow pipe mechanism includes multiple flow guide blind pipes, which are externally fixedly connected to the front side of the pit. A fixing assembly is fixedly connected to the exterior of each flow guide blind pipe, and a directional water guide pipe is slidably connected inside the fixing assembly. Two masonry water-blocking blocks are fixedly connected to the front side of the pit, i.e., the side closest to the flow guide blind pipes. A drain pipe is fixedly connected to the top of the two masonry water-blocking blocks, and the outer side of the drain pipe is fixedly connected to the rear side of the flow guide blind pipes. A drainage ditch is fixedly connected to the top of the pit, and a positioning assembly is fixedly connected to the exterior of the flow guide blind pipes.

[0009] The above technical solution involves: the diversion blind pipe collecting groundwater through its internal pores and guiding it to the directional water pipe to achieve initial groundwater diversion; the construction of water-retaining blocks to prevent water flow from directly impacting the diversion blind pipe and protecting its structural stability; and the drainage pipe discharging the water flow from the diversion blind pipe to the drainage ditch to complete the drainage process.

[0010] As a further description of the above technical solution:

[0011] The geological structure includes an artificial fill layer, the outside of which is located inside the pit, and the inside of the pit contains a layer of fine sand and silt.

[0012] Through the above technical solution, groundwater first passes through an artificial fill layer, which is composed of construction waste, broken bricks and tiles, and sand and gravel. This layer has high porosity and permeability, enabling it to quickly conduct surface water and initially filter impurities.

[0013] As a further description of the above technical solution:

[0014] The top of the fine sand and silt layer is fixedly connected to the bottom of the artificial fill layer, and a pebble layer is set inside the pit, with the top of the pebble layer fixedly connected to the bottom of the fine sand and silt layer.

[0015] The above technical solution involves connecting a fine sand / silt layer to a pebble layer at the bottom. This pebble layer, composed of pebbles of varying sizes, possesses high permeability and compressive strength. The pebble layer can quickly drain groundwater, reducing the impact of water pressure on the pit's sidewalls.

[0016] As a further description of the above technical solution:

[0017] The pit is filled with silty clay and sandy soil, and the top of the silty clay and sandy soil is fixedly connected to the bottom of the pebble layer.

[0018] The above technical solution utilizes silty clay and sandy silt, which have a certain degree of viscosity, to effectively reduce the infiltration rate of groundwater.

[0019] As a further description of the above technical solution:

[0020] The fixing component includes multiple fixing blocks, the interior of which is fixedly connected to the exterior of the flow guide tube. The interior of the multiple fixing blocks has fixing grooves and connecting grooves, and the exterior of the flow guide tube is fixedly connected to the interior of the connecting grooves.

[0021] The above technical solution provides stable support for the blind guide pipe by tightly connecting multiple fixing blocks to the external connecting groove. The fixing groove inside the fixing blocks allows the directional guide pipe to slide within it, enabling flexible adjustment of the water flow direction. The design of the connecting groove ensures the blind guide pipe is firmly fixed, preventing loosening due to water flow impact or external forces.

[0022] As a further description of the above technical solution:

[0023] The positioning component includes multiple support blocks, which are slidably connected to the outside of the flow guide tube. Two support columns are fixedly connected to one side of the outside of the multiple support blocks, and an inclined plate is fixedly connected to one side of the outside of the two support columns. A locking groove is provided on the outside of the support block, that is, on the outside side near the support column.

[0024] The above technical solution involves multiple support blocks slidably connected to the outside of the flow guide pipe, providing flexible support and positioning. Two support columns on one side of the support blocks further enhance the structural stability, and inclined plates inserted into the pit prevent the flow guide pipe from falling off during use. The engaging groove on the side of the support block near the support columns fits tightly with the directional water guide pipe, ensuring precise guidance of water flow direction.

[0025] As a further description of the above technical solution:

[0026] The adjusting mechanism includes a fixed plate, which is externally fixedly connected to the top of the drainage ditch. A rotating column is rotatably connected inside the fixed plate, and limit rings are fixedly connected to both sides of the external rotating column.

[0027] The above technical solution involves a fixed plate that is securely connected to the top of the drainage ditch, providing a stable support foundation for the entire adjustment mechanism. The rotating column is installed inside the fixed plate, allowing for smooth rotation and thus enabling positional adjustments to relevant components. Limiting rings on both sides of the rotating column prevent it from detaching during rotation, ensuring the stability of the adjustment process.

[0028] As a further description of the above technical solution:

[0029] The rotating column is fixedly connected to a bracket, the top of the bracket is fixedly connected to a lever block, and the rear side of the bracket is fixedly connected to multiple insert teeth.

[0030] The above technical solution allows the support and rotating column to rotate by pulling the lever. Multiple insert teeth on the rear side of the support engage with the interior of the pit to achieve a fixed position after adjustment. This design enables the adjustment mechanism to flexibly adjust the position and angle of relevant components in the drainage system, optimizing the drainage path. The insert-type fixing method of the insert teeth further enhances the stability of the system, ensuring a stable state after adjustment.

[0031] This utility model has the following beneficial effects:

[0032] 1. In this utility model, the permeability and water collection capacity of the diversion blind pipe enable it to quickly collect groundwater and guide it to the directional water guide pipe through its internal pores. The directional water guide pipe ensures that the water flow is smoothly conducted to the drain pipe and discharged through the drainage ditch. The construction of water-retaining blocks effectively prevents the water flow from directly impacting the diversion blind pipe and protects its structural stability. Its design not only improves drainage efficiency but also enhances the long-term stability of the system through structural optimization. It is suitable for groundwater control in deep foundation pit construction.

[0033] 2. In this utility model, a fixed plate provides a stable support foundation at the bottom of the pit, allowing the rotating column to rotate smoothly. Pulling the lever can drive the support to rotate, achieving flexible support and multi-angle adjustment of the bottom of the diversion blind pipe to meet the needs of different construction scenarios. After adjustment, the embedded teeth are inserted into the pit to ensure that the diversion blind pipe is firmly fixed and prevents displacement or falling off, significantly improving the stability and reliability of the system. Attached Figure Description

[0034] Figure 1 This is a three-dimensional schematic diagram of a directional drainage system for interlayer water in deep foundation pits proposed in this utility model.

[0035] Figure 2This is a schematic diagram of the connecting groove of a water-directional drainage system between support and retaining layers in a deep foundation pit, as proposed in this utility model.

[0036] Figure 3 This is a schematic diagram of the inclined plate of a water-directional drainage system for interlayer support in deep foundation pits proposed in this utility model.

[0037] Figure 4 This is a schematic diagram of the embedded teeth in a water-directional drainage system for interlayer support in deep foundation pits, as proposed in this utility model.

[0038] Legend:

[0039] 1. Pit; 2. Geological structure; 21. Artificial fill layer; 22. Fine sand and silt layer; 23. Gravel layer; 24. Silty clay and sandy silt; 3. Flow pipe mechanism; 31. Drainage blind pipe; 32. Directional water guide pipe; 33. Drainage pipe; 34. Constructed water retaining block; 35. Drainage ditch; 4. Positioning component; 401. Support column; 402. Support block; 403. Engaging groove; 404. Inclined plate; 5. Fixing component; 501. Fixing block; 502. Fixing groove; 503. Connecting groove; 6. Adjustment mechanism; 61. Fixing plate; 62. Rotating column; 63. Limiting ring; 64. Bracket; 65. Bending block; 66. Embedded tooth. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] Reference Figures 1 to 3 An embodiment of this utility model is provided: a directional drainage system for interlayer water in deep foundation pit support, including a pit 1, a geological mechanism 2 is provided inside the pit 1, a flow pipe mechanism 3 is provided on the front side of the pit 1, and an adjustment mechanism 6 is provided at the bottom of the pit 1.

[0042] The flow pipe mechanism 3 includes multiple blind guide pipes 31, each with multiple pores for collecting and guiding water flow. The multiple blind guide pipes 31 are externally fixedly connected to the front side of the pit 1. A fixing component 5 is also externally fixedly connected to the multiple blind guide pipes 31. A directional water guide pipe 32 is slidably connected inside the fixing component 5 to guide the water flow direction. The fixing component 5 includes multiple fixing blocks 501 for fixing the blind guide pipes 31 and the directional water guide pipe 32, forming a mesh structure that provides stable support. The internal fixing blocks 501 are internally fixedly connected to the blind guide pipes 31. On the outside of pipe 31, multiple fixing blocks 501 have fixing grooves 502 inside, which provide good sliding space, allowing the directional water guide pipe 32 to slide inside the fixing grooves 502. Multiple fixing blocks 501 have connecting grooves 503 inside, designed to engage with the outer sides of the flow guide pipe 31. The outer side of the flow guide pipe 31 is fixedly connected to the inside of the connecting grooves 503. Two masonry water-blocking blocks 34 are fixedly connected to the outer front side of the pit 1, i.e., the side closest to the outer side of the flow guide pipe 31, to block water flow and prevent water from directly impacting the flow guide pipe 31. Two masonry water-retaining blocks 34 are fixedly connected to the top of a drain pipe 33 for discharging collected water. The outer side of the drain pipe 33 is fixedly connected to the outer rear side of the guide pipe 31. A drainage ditch 35 is fixedly connected to the top of the pit 1 for collecting and discharging water discharged from the guide pipe 31. A positioning assembly 4 is fixedly connected to the outside of the guide pipe 31. The positioning assembly 4 includes multiple support blocks 402, designed to provide stable support and pulling capacity. The outer sides of the multiple support blocks 402 are slidably connected to the outside of the guide pipe 31. Two... Each support column 401 is designed to provide stable fixing capabilities, allowing it to be inserted into the pit 1 to fix the directional water guide pipe 32 and the flow guide blind pipe 31. An inclined plate 404 is fixedly connected to the outer side of the two support columns 401. The inclined plate 404 is designed to open and close outward at an angle after the support column 401 drives the inclined plate 404 into the pit 1, thus preventing the flow guide blind pipe 31 from falling off. The outer side of the support block 402, that is, the outer side near the support column 401, is provided with a locking groove 403, which is designed to fit snugly against the outer side of the directional water guide pipe 32.

[0043] Specifically, the diversion blind pipe 31 collects groundwater through its internal pores and guides it to the directional water guide pipe 32. The fixing block 501 of the fixing component 5 engages with the outside of the diversion blind pipe 31 through the connecting groove 503, while providing sliding space for the directional water guide pipe 32, thus fixing the diversion blind pipe 31 and the directional water guide pipe 32. The directional water guide pipe 32 further guides the water flow to the drain pipe 33, and the constructed water-blocking block 34 prevents the water flow from directly impacting the diversion blind pipe 31, protecting its structural stability. The drain pipe 33 discharges the water flow to the drainage ditch 35, completing the drainage process. At the same time, the support block 402 and the support column 401 provide stable support for the diversion blind pipe 31 and the directional water guide pipe 32. The inclined plate 404 is inserted into the pit 1 and opens outward to prevent the diversion blind pipe 31 from falling off. The engaging groove 403 fits with the directional water guide pipe 32, further enhancing the system stability.

[0044] Reference Figure 1 The geological structure 2 includes an artificial fill layer 21, which is located at the top of the pit 1. This artificial fill layer 21 is typically composed of construction waste, broken bricks and tiles, sand and gravel, and has high porosity and permeability. The exterior of the artificial fill layer 21 is located inside the pit 1. Inside the pit 1, there is a fine sand and silt layer 22, which has good permeability and a certain bearing capacity. Its particles are fine and its pores are small, effectively filtering and conducting groundwater. The top of the fine sand and silt layer 22 is fixedly connected to the bottom of the artificial fill layer 21. Inside the pit 1, there is a gravel layer 23, located below the fine sand and silt layer 22, composed of gravel of varying sizes. This layer has high permeability and compressive strength, and can quickly conduct groundwater. The top of the pebble layer 23 is fixedly connected to the bottom of the fine sand and silt layer 22. The pit 1 is filled with silty clay sand silt 24. During the precipitation process, the cohesiveness of this layer can reduce the infiltration of groundwater and prevent excessive settlement at the bottom of the pit. The top of the silty clay sand silt 24 is fixedly connected to the bottom of the pebble layer 23.

[0045] Specifically, the artificial fill layer 21 consists of construction waste, broken bricks and tiles, and gravel. It has high porosity and strong permeability, allowing for rapid filtration and conduction of surface water. The underlying fine sand and silt layer 22 has small particles and small pores, effectively filtering impurities from groundwater. The gravel layer 23 consists of gravel of varying sizes, possessing high permeability and compressive strength, enabling rapid conduction of groundwater and reducing the impact of water pressure on the pit's sidewalls. It also provides some support to the pit, preventing sidewall collapse. The silty clay and sandy silt layer 24 has a certain degree of cohesion, which reduces groundwater infiltration during dewatering, preventing excessive settlement at the bottom of the pit.

[0046] Reference Figure 1 and Figure 4The adjustment mechanism 6 includes a fixed plate 61, which is designed to provide stable support. The fixed plate 61 is externally fixedly connected to the top of the drainage ditch 35. A rotating column 62 is rotatably connected inside the fixed plate 61. The rotating column 62 can rotate smoothly inside the fixed plate 61 due to the support of the fixed plate 61. Limiting rings 63 are fixedly connected to both sides of the outside of the rotating column 62. The design of the limiting rings 63 can prevent the rotating column 62 from falling off during rotation. A bracket 64 is fixedly connected to the outside of the rotating column 62, which is designed to provide good support. A lever block 65 is fixedly connected to the top of the bracket 64. By pulling the lever block 65, the bracket 64 can be pulled out. Multiple inserting teeth 66 are fixedly connected to the rear side of the bracket 64. The inserting teeth 66 are inserted into the inside of the pit 1.

[0047] Specifically, the fixing plate 61 is fixed at the bottom of the pit 1, which can provide good rotation space for the rotating column 62. At the same time, by pulling the lever 65, the bracket 64 can be rotated. Its design can support and lift the bottom of the flow guide tube 31 to make different angle adjustments. Meanwhile, the embedded teeth 66 are inserted into the pit 1 to fix it after adjustment.

[0048] Working Principle: Groundwater first passes through various soil layers in Geological Structure 2 for filtration and conduction. The artificial fill layer 21, composed of construction waste, broken bricks and tiles, and gravel, has high porosity and permeability, enabling rapid conduction of surface water and initial filtration of impurities. Subsequently, the water flows into the fine sand and silt layer 22, whose small particles and pores further filter impurities and conduct water flow. The water continues downward into the gravel layer 23, composed of pebbles of varying sizes, possessing high permeability and compressive strength, enabling rapid drainage of groundwater and providing support for the pit sidewalls to prevent collapse. The bottom layer of silty clay and sandy loam 24 utilizes its cohesiveness to reduce groundwater infiltration and prevent excessive settlement at the bottom of the pit. Simultaneously, the blind guide pipe 31 in the flow pipe structure 3 collects groundwater through its internal pores and guides it to the directional guide pipe 32. The fixing block 501 in the fixing assembly 5 fixes the blind guide pipe 31 and the directional guide pipe 32 into a mesh structure, providing stable support. The directional water guide pipe 32 further guides the water flow to the drain pipe 33, and finally discharges it through the drainage ditch 35, completing the drainage process. A water-blocking block 34 is constructed to prevent the water flow from directly impacting the blind guide pipe 31, protecting its structural stability. The support block 402 and support column 401 in the positioning assembly 4 provide support for the blind guide pipe 31 and the directional water guide pipe 32. The inclined plate 404, inserted into the pit 1, opens and closes outwards to prevent the blind guide pipe 31 from falling off. The locking groove 403 fits snugly with the directional water guide pipe 32, further enhancing system stability.

[0049] During operation, the fixing plate 61 is installed at the bottom of the pit 1. By pulling the lever 65, the support 64 is rotated. The rotation of the support 64 is achieved through its fixed connection with the rotating column 62, which rotates smoothly inside the fixing plate 61, ensuring flexibility in the adjustment process. At the same time, the limiting ring 63 prevents the rotating column 62 from falling off during rotation, ensuring the stability of the adjustment process. When the support 64 rotates to the appropriate position, the inserting teeth 66 on its outer rear side are inserted into the pit 1 to complete the fixation. At this time, the support 64 provides support and lift for the bottom of the drainage blind pipe 31, allowing for adjustment at different angles according to actual needs. This enables the drainage blind pipe 31 to adjust its position and angle according to the geological conditions and construction requirements within the pit, thereby optimizing the drainage effect and ensuring the efficient operation of the directional drainage system between the support and retaining layers in the deep pit.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A directional drainage system for interlayer water in deep foundation pit support, comprising a pit (1), characterized in that: The pit (1) is equipped with a geological mechanism (2), the pit (1) is equipped with a flow pipe mechanism (3) on the front side of the outside, and the pit (1) is equipped with an adjustment mechanism (6) at the bottom. The flow pipe mechanism (3) includes multiple flow guide blind pipes (31). The external of the multiple flow guide blind pipes (31) is fixedly connected to the front side of the pit (1). The external of the multiple flow guide blind pipes (31) is fixedly connected to a fixing component (5). The internal of the fixing component (5) is slidably connected to a directional water guide pipe (32). The external front side of the pit (1), i.e. the side closest to the external of the flow guide blind pipes (31), is fixedly connected to two masonry water-blocking blocks (34). The top of the two masonry water-blocking blocks (34) is fixedly connected to a drain pipe (33). The external side of the drain pipe (33) is fixedly connected to the rear side of the flow guide blind pipes (31). The top of the pit (1) is fixedly connected to a drainage ditch (35). The external of the flow guide blind pipes (31) is fixedly connected to a positioning component (4).

2. The deep foundation pit internal support and retaining layer water directional drainage system according to claim 1, characterized in that: The geological structure (2) includes an artificial fill layer (21), the outside of which is located inside the pit (1), and the inside of the pit (1) is provided with a fine sand and silt layer (22).

3. The deep foundation pit internal support and retaining layer water directional drainage system according to claim 2, characterized in that: The top of the fine sand and silt layer (22) is fixedly connected to the bottom of the artificial fill layer (21), and a pebble layer (23) is provided inside the pit (1), with the top of the pebble layer (23) fixedly connected to the bottom of the fine sand and silt layer (22).

4. A directional drainage system for interlayer water in deep foundation pit support as described in claim 3, characterized in that: The pit (1) is filled with silty clay sandy soil (24), and the top of the silty clay sandy soil (24) is fixedly connected to the bottom of the pebble layer (23).

5. A directional drainage system for interlayer water in deep foundation pit support as described in claim 1, characterized in that: The fixing component (5) includes multiple fixing blocks (501), the interior of the multiple fixing blocks (501) is fixedly connected to the exterior of the flow guide blind tube (31), the interior of the multiple fixing blocks (501) is provided with fixing grooves (502), the interior of the multiple fixing blocks (501) is provided with connecting grooves (503), and the exterior of the flow guide blind tube (31) is fixedly connected to the interior of the connecting grooves (503).

6. A directional drainage system for interlayer water in deep foundation pit support as described in claim 1, characterized in that: The positioning component (4) includes multiple support blocks (402), the external of the multiple support blocks (402) is slidably connected to the outside of the flow guide blind tube (31), two support columns (401) are fixedly connected to one side of the external of the multiple support blocks (402), and an inclined plate (404) is fixedly connected to one side of the external of the two support columns (401). A locking groove (403) is opened on the external side of the support block (402), that is, the external side close to the support column (401).

7. A directional drainage system for interlayer water in deep foundation pit support as described in claim 1, characterized in that: The adjustment mechanism (6) includes a fixed plate (61), which is fixedly connected to the top of the drainage ditch (35) on the outside. A rotating column (62) is rotatably connected inside the fixed plate (61), and limit rings (63) are fixedly connected to the two sides of the outside of the rotating column (62).

8. A directional drainage system for interlayer water in deep foundation pit support as described in claim 7, characterized in that: The rotating column (62) is fixedly connected to a bracket (64), the top of the bracket (64) is fixedly connected to a lever block (65), and the rear side of the bracket (64) is fixedly connected to a plurality of insert teeth (66).

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