A structure of a cutoff groundwater bite pile
By setting up a pile structure around the diaphragm wall and interlocking the steel sheet piles, the problem of mud slurry contaminating groundwater during diaphragm wall construction was solved, and effective protection of groundwater was achieved during construction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ERCHU CO LTD OF CHINA RAILWAY TUNNEL GRP
- Filing Date
- 2025-06-24
- Publication Date
- 2026-06-19
AI Technical Summary
In the construction of subways in nature reserves, the slurry used for forming underground continuous walls is prone to cross-contamination and polluting groundwater, and existing technologies are unable to effectively prevent this problem.
A pile structure is installed around the perimeter of the diaphragm wall, with sequentially connected steel sheet piles inserted inside. Interlocking parts are provided at both ends of the steel sheet piles, forming a stable structure that prevents the flow of mud and groundwater. This steel sheet pile insertion structure is achieved through a static pressure pile driver, which inserts the steel sheet piles to form a stable interlocking structure, thus preventing the flow of mud and groundwater.
It effectively blocks the flow of mud and groundwater, prevents groundwater pollution, and ensures that construction does not affect the water quality of the nature reserve.
Smart Images
Figure CN224378926U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of construction technology, specifically to a groundwater-blocking interlocking pile structure. Background Technology
[0002] In the construction industry, for underground construction operations, it is necessary to build diaphragm walls in advance to ensure the smooth progress of construction. Diaphragm walls are a type of underground wall formed in foundation engineering by using special trenching machinery on the ground and the wall protection effect of mud to dig a narrow and deep foundation trench, and pouring appropriate materials into it to form a continuous underground wall with seepage prevention, soil retention and load-bearing functions.
[0003] In subway construction projects that involve certain nature reserves, some areas inevitably lie near the core outcrop areas of springs, with unique hydrogeological conditions, complex spring flow channels, and shallow groundwater levels. Construction in these areas requires buildings to not only traverse thick silt layers and water-rich, penetrating gravel layers, but also to ensure that construction does not pollute the groundwater.
[0004] Given the aforementioned construction environment, there is a risk of mud slurry mixing during the construction of diaphragm walls, which could pollute groundwater and impact the water quality of the nature reserve.
[0005] Therefore, we propose a groundwater-blocking interlocking pile structure to prevent groundwater contamination from mud slurry during the construction of diaphragm walls. Utility Model Content
[0006] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a groundwater-blocking interlocking pile structure.
[0007] In a first aspect, this application provides a groundwater-blocking interlocking pile structure, which is installed around a diaphragm wall to prevent the mixing of slurry and groundwater during the pouring of the diaphragm wall. The interlocking pile structure includes:
[0008] A pile structure, wherein the pile structure is disposed outside the underground continuous wall;
[0009] An insert pile structure is provided inside the pile body structure. The insert pile structure includes a plurality of steel sheet piles connected in sequence. Each steel sheet pile has an interlocking part at both ends for connecting with adjacent steel sheet piles.
[0010] According to the technical solution provided in the embodiments of this application, the pile structure includes:
[0011] The pile hole portion includes:
[0012] A plurality of first pile holes are provided, wherein the first pile holes are opened on the ground along a first direction and are located outside the underground continuous wall, and the plurality of first pile holes are arranged at intervals.
[0013] A plurality of second pile holes are provided, which are opened on the ground along a first direction, and the plurality of second pile holes and the plurality of first pile holes are arranged at intervals.
[0014] According to the technical solution provided in the embodiments of this application, both the first pile hole and the second pile hole are filled with sand.
[0015] According to the technical solution provided in the embodiments of this application, the steel sheet pile includes a pile body having a first section, wherein the first section is a flat section;
[0016] The pile body also has a second section, with the second section provided at both ends of the first section, and the two second sections are symmetrically arranged about the first section.
[0017] According to the technical solution provided in the embodiments of this application, the interlocking portion includes:
[0018] The third segment is located at the end of the second segment that is far from the first segment, and the third segment is a flat segment that is parallel to the first segment;
[0019] The fourth segment is located at the end of the third segment away from the second segment. The fourth segment is an arc-shaped segment, and the end of the fourth segment away from the third segment is located on the side of the third segment closer to the second segment.
[0020] The fifth segment is located at the end of the fourth segment away from the third segment, and the fifth segment is a flat segment and parallel to the first segment.
[0021] According to the technical solution provided in the embodiments of this application, the interlocking portion further includes:
[0022] A limiting block is disposed on the fifth segment and located on the side wall of the fifth segment near the third segment;
[0023] The limiting block has a triangular structure.
[0024] According to the technical solution provided in the embodiments of this application, the adjacent sheet piles are arranged in reverse order, and the interlocking portions on the adjacent sheet piles are engaged with each other.
[0025] In summary, this technical solution specifically discloses a groundwater-blocking interlocking pile structure, which is installed on the periphery of a diaphragm wall to prevent the mud and groundwater from mixing during the diaphragm wall construction and causing groundwater pollution. The interlocking pile structure includes a pile body structure installed on the periphery of the diaphragm wall; the interlocking pile structure also includes an insert pile structure installed inside the pile body structure. The insert pile structure includes several steel sheet piles connected in sequence, with interlocking parts at both ends of each steel sheet pile for connecting with adjacent steel sheet piles, achieving a snap-fit between the interlocking parts, ensuring a tight connection, effectively blocking groundwater seepage or mud leakage, and preventing the mixing of mud and groundwater from causing groundwater pollution. Attached Figure Description
[0026] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0027] Figure 1 A schematic diagram showing the location of the interlocking pile structure.
[0028] Figure 2 This is a top view of the interlocking pile structure.
[0029] Figure 3 for Figure 2 Enlarged view of point A in the middle.
[0030] Figure 4 This is a diagram showing the drilling sequence of the first and second pile holes.
[0031] Figure 5 This is a step-by-step diagram of the construction method for interlocking pile structures.
[0032] The diagram is labeled as follows: 1. Diaphragm wall; 2. Sheet pile; 3. First pile hole; 4. Second pile hole; 5. First section; 6. Second section; 7. Third section; 8. Fourth section; 9. Fifth section; 10. Limiting block; 11. Interlocking pile structure. Detailed Implementation
[0033] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.
[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0035] Example 1
[0036] Please refer to Figure 1A groundwater-blocking interlocking pile structure is installed around the underground continuous wall 1 to prevent the flow of mud and groundwater during the pouring of the underground continuous wall 1.
[0037] Because the diaphragm wall 1 is constructed by pouring reinforced concrete, and the construction site is located in the nature reserve near the core outcrop area of the spring, the hydrogeological conditions are special, the spring runoff channels are complex, and the groundwater is shallow. Due to its special geological environment, groundwater is prone to seepage when excavating trenches on the ground. If the diaphragm wall 1 is directly poured with reinforced concrete, it will cause the mud and groundwater in the diaphragm wall 1 to cross, resulting in pollution of the water quality of the nature reserve. Therefore, groundwater-blocking interlocking piles are built between the diaphragm wall 1 and the core outcrop area of the spring to prevent the mud and groundwater from crossing.
[0038] The interlocking pile structure 11 includes:
[0039] The pile structure is located outside the underground continuous wall 1;
[0040] An insert pile structure is set inside the pile body structure. The insert pile structure includes several steel sheet piles 2 connected in sequence. Both ends of the steel sheet piles 2 are provided with interlocking parts for connecting with adjacent steel sheet piles 2.
[0041] By establishing an interlocking pile structure 11 between the underground continuous wall 1 and the core outcropping area of the spring, a pile structure is set on the periphery of the underground continuous wall 1, and an insert pile structure is set inside the pile structure. The insert pile structure includes several steel sheet piles 2 that are sequentially interlocked by interlocking parts, thereby forming two gaps, effectively separating groundwater and mud, and preventing mud cross-contamination.
[0042] like Figure 2 As shown, the pile structure includes:
[0043] The pile hole section includes:
[0044] A plurality of first pile holes 3 are opened on the ground along a first direction and located outside the underground continuous wall 1, and the plurality of first pile holes 3 are arranged at intervals.
[0045] Several second pile holes 4 are opened on the ground along the first direction, and several second pile holes 4 and several first pile holes 3 are arranged at intervals.
[0046] The first direction is Figure 1 In the vertical direction;
[0047] Among them, the first pile hole 3 and the second pile hole 4 are drilled on the ground by a drilling rig. The first pile hole 3 and the second pile hole 4 are set on the periphery of the underground continuous wall 1. Several first pile holes 3 are set at intervals, and a second pile hole 4 is set between two adjacent first pile holes 3.
[0048] Furthermore, there is an overlapping area between the first pile hole 3 and the second pile hole 4;
[0049] Furthermore, both the first pile hole 3 and the second pile hole 4 are filled with sand; the sand can prevent the inserted pile structure from shifting during the insertion process.
[0050] The sheet pile 2 includes a pile body, which has a first section 5, the first section 5 being a flat section;
[0051] The pile body also has a second section 6, with the second section 6 set at both ends of the first section 5, and the two second sections 6 are symmetrically arranged about the first section 5;
[0052] Therefore, there is an opening between the two second segments 6 of the sheet pile 2;
[0053] Furthermore, the openings of two adjacent sheet piles 2 face opposite directions, resulting in different pressures exerted on the sheet piles 2 by the sand on both sides of the sheet piles 2, which allows the interlocking parts of the two adjacent sheet piles 2 to be securely engaged.
[0054] like Figure 3 As shown, the occlusal portion includes:
[0055] The third segment 7 is located at the end of the second segment 6 that is far from the first segment 5, and the third segment 7 is a horizontal segment that is parallel to the first segment 5.
[0056] The fourth segment 8 is located at the end of the third segment 7 that is far from the second segment 6. The fourth segment 8 is an arc-shaped segment, and the end of the fourth segment 8 that is far from the third segment 7 is located on the side of the third segment 7 that is close to the second segment 6.
[0057] The fifth segment 9 is located at the end of the fourth segment 8 that is far from the third segment 7. The fifth segment 9 is a horizontal segment and is parallel to the first segment 5.
[0058] Furthermore, the occlusal region also includes:
[0059] Limiting block 10 is provided on the fifth segment 9 and is located on the side wall of the fifth segment 9 near the third segment 7;
[0060] Limiting block 10 has a triangular structure;
[0061] Thus, by extending the third segment 7 away from the sheet pile 2, and setting an arc-shaped fourth segment 8 at the end away from the second segment 6, with the fourth segment 8 extending towards the side closer to the sheet pile 2, a hook structure is formed, which provides favorable conditions for the mutual interlocking of adjacent sheet piles 2.
[0062] A limiting block 10 is set on the side wall of the fifth section 9 near the third section 7. Its triangular structure has an inclined surface. The limiting blocks 10 of the interlocking parts of the adjacent sheet piles 2 are engaged by the inclined surface. Under the condition that the two adjacent sheet piles 2 are subjected to the reverse pressure of sand, the interlocking parts of the adjacent sheet piles 2 abut against each other, which can achieve stable locking and avoid separation.
[0063] Example 2
[0064] like Figure 4 and Figure 5 As shown, a construction method for establishing the interlocking pile structure 11 provided in Embodiment 1 includes the following steps:
[0065] S01. Two first pile holes 3 are drilled at intervals on the ground;
[0066] S02. Drill a second pile hole 4 between the two first pile holes 3;
[0067] S03. Drill a third first pile hole 3 on the side of one of the first pile holes 3 away from the other first pile hole 3;
[0068] S04. Drill a second second pile hole 4 between the third first pile hole 3 and the second first pile hole 3;
[0069] S05. Repeat steps S03 and S04 until the nth second pile hole 4 is completed;
[0070] S06. Backfill with sand to fill the first pile hole 3 and the second pile hole 4;
[0071] S07. Several sheet piles 2 are inserted sequentially along the extension direction of the pile structure by static pressure pile planting method, and the interlocking parts on adjacent sheet piles 2 are engaged.
[0072] The first pile hole 3 and the second pile hole 4 are both drilled in the ground along the first direction by a drilling rig; the extension range of the pile structure formed by the first pile hole 3 and the second pile hole 4 is determined by the range of the core outcropping area of the spring at the actual construction site.
[0073] Furthermore, before the drilling rig starts working, the construction location of the diaphragm wall 1 is first determined, and a preset distance is reserved on the side of the diaphragm wall 1 near the core exposed area of the spring to determine the drilling location of the drilling rig, and the extension range of the pile structure is determined according to the range of the core exposed area of the spring.
[0074] Furthermore, the diameters of the first pile hole 3 and the second pile hole 4 are determined based on the actual required specifications of the interlocking piles.
[0075] The static pressure pile driving method uses a static pressure pile driving machine. The first steel sheet pile 2 is driven in by the static pressure pile driving machine. After each driving operation is completed, the static pressure pile driving machine moves forward by itself, thereby driving several steel sheet piles 2 into the first pile hole 3 or the second pile hole 4.
[0076] Furthermore, the sheet pile 2 is clamped by the chuck of the static pressure pile driver and moved to the preset position in the middle of the first pile hole 3 or the second pile hole 4. The connecting hook of the sheet pile 2 to be driven in is engaged with the already driven sheet pile 2 through the limiting block 10. Then the sheet pile 2 is inserted for static driving to the required depth.
[0077] It should be noted that applying grease and waterproof mixture to the interlocking part of the sheet pile 2 not only facilitates the driving of the sheet pile 2, but also ensures that the interlocking part is tightly sealed after driving, thus providing a good waterproofing effect.
[0078] After the interlocking pile structure 11 is completed, the underground continuous wall 1 can be constructed. The interlocking pile structure 11 can prevent the construction of the underground continuous wall 1 from polluting the lake water and can also prevent the lake water from seeping into the foundation pit.
[0079] After the diaphragm wall 1 is constructed, in order to recover and reuse the sheet piles 2, a crawler-mounted pile extractor, in conjunction with a vibratory hammer, is used to extract the piles. First, the pile driver clamps the head of the sheet pile 2 and vibrates it for 1 to 2 minutes to loosen the sand around the sheet pile 2 and reduce the friction between the sand and the sheet pile 2. Then, it is slowly pulled upwards by vibration. After the sheet pile 2 is extracted, sand is backfilled and compacted into the first pile hole 3 and the second pile hole 4.
[0080] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.
Claims
1. A groundwater-blocking interlocking pile structure, which is installed around a diaphragm wall (1) to prevent the mixing of slurry and groundwater during the pouring of the diaphragm wall (1), characterized in that, The interlocking post structure (11) includes: The pile structure is located around the underground continuous wall (1); An insert pile structure is provided inside the pile body structure. The insert pile structure includes a number of steel sheet piles (2) connected in sequence. Both ends of the steel sheet piles (2) are provided with interlocking parts for connecting with the adjacent steel sheet piles (2).
2. The bite pile structure of claim 1, wherein The pile structure includes: The pile hole portion includes: A plurality of first pile holes (3) are provided, the first pile holes (3) are opened on the ground along the first direction and are located outside the underground continuous wall (1), and the plurality of first pile holes (3) are arranged at intervals; A plurality of second pile holes (4) are provided, the second pile holes (4) being opened on the ground along a first direction, and the plurality of second pile holes (4) and the plurality of first pile holes (3) are arranged at intervals.
3. The bite pile structure of claim 2, wherein, Both the first pile hole (3) and the second pile hole (4) are filled with sand.
4. The bite pile structure of claim 1, wherein The sheet pile (2) includes a pile body having a first section (5), wherein the first section (5) is a flat section; The pile body also has a second section (6), and the second section (6) is provided at both ends of the first section (5), and the two second sections (6) are symmetrically arranged about the first section (5).
5. The bite pile structure of claim 4, wherein The occlusal portion includes: The third segment (7) is located at the end of the second segment (6) away from the first segment (5), and the third segment (7) is a flat segment that is parallel to the first segment (5). The fourth segment (8) is located at the end of the third segment (7) away from the second segment (6). The fourth segment (8) is an arc-shaped segment. The end of the fourth segment (8) away from the third segment (7) is located on the side of the third segment (7) close to the second segment (6). The fifth segment (9) is located at the end of the fourth segment (8) away from the third segment (7). The fifth segment (9) is a flat segment and is parallel to the first segment (5).
6. The post-and-core structure according to claim 5, wherein The occlusal portion further includes: Limiting block (10), the limiting block (10) is disposed on the fifth segment (9) and located on the side wall of the fifth segment (9) near the third segment (7); The limiting block (10) has a triangular structure.
7. The post-and-core structure according to claim 6, wherein The adjacent sheet piles (2) are arranged in reverse order, and the interlocking parts on the adjacent sheet piles (2) are interlocked.