A seepage-proof deep foundation pit steel sheet pile supporting structure

Abstract

The utility model discloses a kind of anti-seepage deep foundation pit steel sheet pile support structures, it is related to foundation pit support technical field.The utility model includes first baffle, the side of first baffle is provided with second baffle, the side of first baffle and second baffle is all set with water seepage hole, splicing assembly is set between first baffle and second baffle, the splicing assembly includes fixed strip, the inner wall of first baffle and second baffle is all fixedly connected with the surface of fixed strip.The utility model is formed multiple sealing interface by fixed strip, clamping plate, splicing frame and splicing plate in splicing assembly, cooperate the tensioning effect of mounting bolt, effectively close the splicing gap between baffle, prevent groundwater from seepage from lock mouth;Meanwhile, water seepage hole and drainage hole can be orderly guided and discharge groundwater, avoid waterlogging in foundation pit, significantly improve anti-seepage performance, overcome the leakage problem caused by lock gap of traditional steel sheet pile.

Description

Technical Field

[0001] This utility model belongs to the field of foundation pit support technology, and in particular relates to a seepage-proof deep foundation pit steel sheet pile support structure. Background Technology

[0002] Deep foundation pit steel sheet pile support structure is an important temporary support system used in the field of building construction, municipal engineering, water conservancy engineering and other fields during the foundation pit excavation stage. Its core function is to resist the soil pressure and water pressure on the side wall of the foundation pit, prevent the collapse and deformation of the foundation pit slope, and ensure the safety of foundation pit excavation and construction and the stability of surrounding buildings and underground pipelines.

[0003] Chinese patent application CN218479145U discloses a deep foundation pit support structure using sheet piles. The structure includes multiple sheet piles installed on the inner wall of the foundation pit. A wainscoting beam is installed inside the pit corresponding to the sheet pile positions. An inner support tube is installed inside the pit to support the wainscoting beam. Adjustable tubes are sleeved at the ends of the inner support tubes corresponding to the contact sides with the wainscoting beam. The wainscoting beam includes a flat plate that abuts against the sidewall of the sheet piles, and reinforcing plates forming a square groove to accommodate the ends of the adjustable tubes. The reinforcing plates improve the structural stability of the flat plate, making it less prone to deformation. The square groove formed by the reinforcing plates and the adjustable tubes allows for accurate positioning of the contact points, preventing them from easily detaching. The tubular shape of the adjustable tube allows for adjustment of the distance between the adjustable tube and the inner support tube by rotation, providing a wider adjustment range to accommodate wainscoting beams with different spacing requirements.

[0004] Although this patent allows for adjustment of the support range, it still suffers from the drawback of lacking a seepage-proof structure. In practical engineering applications, deep foundation pits are located in complex geological environments, especially in strata rich in groundwater such as silty clay, sand, and gravel. Existing sheet pile support structures have significant technical defects: because the interlocking joints of sheet piles rely solely on mechanical interlocking for splicing, the interlocking gaps are difficult to completely seal. Furthermore, the interlocking joints are prone to deformation and corrosion during long-term storage and transportation, further widening the gaps. Simultaneously, traditional sheet piles are single metal sheet structures without a dedicated seepage-proof design, failing to prevent groundwater from seeping into the foundation pit through the interlocking gaps or the tiny pores within the sheet pile itself. These problems lead to continuous groundwater seepage from the sidewalls of the support wall during foundation pit excavation. This not only causes water accumulation in the foundation pit, affecting the dryness and cleanliness of the construction work surface and reducing construction efficiency, but also increases the water content of the soil on the foundation pit sidewalls, reduces shear strength, and consequently triggers safety hazards such as foundation pit slope instability and excessive sheet pile displacement.

[0005] To address these issues, we provide a seepage-proof deep foundation pit steel sheet pile support structure. Utility Model Content

[0006] The purpose of this utility model is to provide a seepage-proof deep foundation pit steel sheet pile support structure. Through the cooperation of splicing components and support components, it solves the problem that the existing deep foundation pit steel sheet pile support structure lacks seepage prevention function and cannot prevent groundwater from seeping into the foundation pit through the interlock gap or the tiny pores of the steel sheet pile body.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0008] This utility model relates to a seepage-proof deep foundation pit steel sheet pile support structure, comprising a first protective plate, a second protective plate disposed on one side of the first protective plate, and seepage holes on one side of both the first and second protective plates. A splicing assembly is disposed between the first and second protective plates, the splicing assembly including a fixing strip. The inner walls of both the first and second protective plates are fixedly connected to the surface of the fixing strip. A snap-fit ​​plate is movably connected to one side of the fixing strip. A splicing frame is fixedly connected to one side of both the first and second protective plates, and a splicing plate is disposed in the inner cavity of the splicing frame. A threaded seat is fixedly connected to the back of the first protective plate, and a fixing seat is fixedly connected to the back of the second protective plate. An installation bolt is penetrated through the inner cavity of the fixing seat, and a nut is threadedly connected to one side of the surface of the installation bolt. Drainage holes are disposed at the bottom of opposite sides of both the first and second protective plates.

[0009] The present invention is further configured such that a support assembly is provided on the back of both the first and second protective plates. The support assembly includes a mounting base, and the back of both the first and second protective plates is fixedly connected to the surface of the mounting base. A retaining seat is movably connected to the inner cavity of the mounting base, and a threaded tube is fixedly connected to one side of the retaining seat. An adjusting screw is threadedly connected to the inner cavity of the threaded tube. The support assembly consists of a mounting base, a retaining seat, a threaded tube, and an adjusting screw. The mounting base is fixed to the back of the first and second protective plates. The retaining seat is movably embedded into the inner cavity of the mounting base. The threaded tube is fixedly connected to the retaining seat. The adjusting screw is screwed into the threaded tube. By rotating the adjusting screw, its extension length can be changed, thereby making the first and second protective plates press tightly against the side wall of the foundation pit. This assembly provides adjustable back support for the first and second protective plates, effectively transferring the lateral earth pressure of the foundation pit to the internal support system and avoiding local overload deformation of the first and second protective plates.

[0010] The present invention is further configured such that an adjusting disc is fixedly connected to the surface of the adjusting screw, and an insertion hole is provided on one side of the adjusting disc. An adjusting disc is fixedly connected to the tail of the adjusting screw, and an insertion hole is provided on the side of the disc. During construction, a lever (such as a steel bar) can be inserted into the insertion hole, and the adjusting screw can be easily rotated using the lever principle to achieve precise fine adjustment of the length.

[0011] The present invention is further configured such that a limiting ring is fixedly connected to one end of the threaded tube, and the inner cavity of the limiting ring is movably connected to the surface of the adjusting screw. This limiting ring does not obstruct the rotation of the adjusting screw, but prevents the adjusting screw from radially running or completely dislodging from the threaded tube during rotation.

[0012] The present invention is further configured such that a slot is provided on one side of the first protective plate, and an insert plate is fixedly connected to the side of the second protective plate facing the first protective plate. The surface of the insert plate is movably connected to the inner cavity of the slot. A slot is provided on one side of the first protective plate, and an insert plate is fixed on the corresponding side of the second protective plate. When the two protective plates are assembled, the insert plate is inserted into the slot of the adjacent protective plate to form a preliminary positioning and connection. Before final fastening by the splicing components, the protective plates are quickly and initially aligned, simplifying the installation process and improving the assembly efficiency.

[0013] The present invention is further configured such that magnetic grooves are provided on both sides of the inner cavity of the mounting base, and magnetic blocks are fixedly connected to both sides of the card holder. The surface of the magnetic blocks is movably connected to the inner cavity of the magnetic grooves. Magnetic grooves are provided on both sides of the inner cavity of the mounting base, and magnetic blocks are fixed on both sides of the card holder. When the card holder is placed into the mounting base, the magnetic blocks are automatically attracted and positioned in the magnetic grooves under the action of magnetic force. Before tightening the adjusting screw, the support component is quickly and temporarily fixed in the working position by magnetic force, which is convenient for subsequent operation by construction personnel. It has obvious advantages, especially in high-altitude or inconvenient two-handed operation scenarios.

[0014] The present invention is further configured such that a sealing ring is provided in the inner cavity of the drainage hole, and magnetic rings are fixedly connected to the edges on both sides of the drainage hole. A sealing ring (such as a rubber ring) is provided in the inner cavity of the drainage hole, and magnetic rings are fixed to the edges on both sides of the drainage hole. When an external drainage pipe needs to be installed, the pipe port can be positioned with the assistance of the magnetic ring and the sealing ring can be pressed tightly. The sealing ring can effectively prevent groundwater from leaking from the gap between the drainage pipe and the drainage hole, ensuring that the accumulated water can only be discharged in an orderly manner through the pipe.

[0015] The present invention is further configured such that an arc-shaped plate is fixedly connected to one side of both the first and second guard plates, and one side of the arc-shaped plate is fixedly connected to the surface of the splicing frame. The arc-shaped plate serves as a reinforcing rib, which enhances the structural strength at the connection between the guard plate and the splicing frame, making the critical stress node more able to withstand the bending moment and shear force brought by the soil pressure.

[0016] The present invention has the following beneficial effects.

[0017] 1. This utility model forms multiple sealing interfaces with the splicing components, including the fixing strip, snap-fit ​​plate, splicing frame, and splicing plate. Combined with the tightening effect of the mounting bolts, it effectively seals the splicing gap between the protective plates, preventing groundwater from seeping in through the interlocking opening. At the same time, the setting of seepage holes and drainage holes can guide and discharge groundwater in an orderly manner, avoiding water accumulation in the foundation pit, significantly improving the seepage prevention performance, and overcoming the leakage problem caused by the interlocking gap in traditional steel sheet piles.

[0018] 2. This utility model adopts an adjustable support component and a reinforced arc plate design. The adjustment screw enables precise clamping and force transmission of the support structure, enhancing the overall rigidity and resistance to deformation. The combination of magnetic blocks and magnetic grooves enables rapid positioning and temporary fixing of the support components, greatly improving installation efficiency. It is suitable for complex geology and narrow construction spaces, effectively improving the stability and construction convenience of the support system. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0020] Figure 1 This is a three-dimensional diagram of a seepage-proof deep foundation pit steel sheet pile support structure.

[0021] Figure 2 This is a schematic diagram of the back structure of a seepage-proof deep foundation pit steel sheet pile support structure.

[0022] Figure 3 A type of seepage-proof deep foundation pit steel sheet pile support structure Figure 2 A magnified view of a portion of point A in the middle.

[0023] Figure 4 A cross-sectional view of a seepage-proof deep foundation pit steel sheet pile support structure. Figure 1 .

[0024] Figure 5 A type of seepage-proof deep foundation pit steel sheet pile support structure Figure 4 A magnified view of a portion of point B in the middle.

[0025] Figure 6 A cross-sectional view of a seepage-proof deep foundation pit steel sheet pile support structure. Figure 2 .

[0026] Figure 7 A type of seepage-proof deep foundation pit steel sheet pile support structure Figure 6 A magnified view of a portion of point C.

[0027] Figure 8This is a schematic diagram of a support component in a seepage-proof deep foundation pit steel sheet pile support structure. In the attached diagram: 1. First protective plate; 2. Second protective plate; 3. Seepage hole; 4. Splicing component; 401. Fixing strip; 402. Clip plate; 403. Splicing frame; 404. Splicing plate; 405. Threaded seat; 406. Fixing seat; 407. Mounting bolt; 408. Nut; 409. Drainage hole; 5. Support component; 501. Mounting seat; 502. Clip seat; 503. Threaded pipe; 504. Adjusting screw. Detailed Implementation

[0028] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] Please see Figure 1-8 This utility model relates to a seepage-proof deep foundation pit steel sheet pile support structure, comprising a first protective plate 1, a second protective plate 2 disposed on one side of the first protective plate 1, and seepage holes 3 on one side of both the first protective plate 1 and the second protective plate 2. A splicing assembly 4 is disposed between the first protective plate 1 and the second protective plate 2, the splicing assembly 4 including a fixing strip 401, the inner walls of the first protective plate 1 and the second protective plate 2 being fixedly connected to the surface of the fixing strip 401, and a snap-fit ​​plate 402 being movably connected to one side of the fixing strip 401. A splicing frame 403 is fixedly connected to one side of both the first guard plate 1 and the second guard plate 2. A splicing plate 404 is provided in the inner cavity of the splicing frame 403. A threaded seat 405 is fixedly connected to the back of the first guard plate 1. A fixing seat 406 is fixedly connected to the back of the second guard plate 2. An installation bolt 407 is connected through the inner cavity of the fixing seat 406. A nut 408 is threadedly connected to one side of the surface of the installation bolt 407. Drainage holes 409 are provided at the bottom of the opposite side of the first guard plate 1 and the second guard plate 2.

[0030] Specifically: The first guard plate 1 and the second guard plate 2 are initially positioned and aligned through the cooperation of the insert plate and the slot, and then finally fastened using the splicing assembly 4. The fixing strip 401 in the splicing assembly 4 is fixedly connected to the inner wall of the first guard plate 1 and the second guard plate 2. The snap-fit ​​plate 402 is movably connected to one side of the fixing strip 401, which can splice two adjacent guard plates. Together with the splicing frame 403 and the splicing plate 404, multiple locking and sealing interfaces are formed. The threaded seat 405 and the fixing seat 406 are connected by the mounting bolts 407 and the nuts 408 to achieve a tension connection between the guard plates, effectively pressing the contact surfaces and reducing the splicing gap. The seepage holes 3 opened on the surface of the first guard plate 1 and the second guard plate 2 can guide some groundwater into the cavity of the guard plate to avoid water pressure acting directly on the plate surface. The drainage hole 409 set at the bottom, together with the sealing ring and the magnetic ring, can quickly seal and connect with the external drainage pipe to achieve orderly drainage.

[0031] Support components 5 are provided on the back of both the first guard plate 1 and the second guard plate 2. Each support component 5 includes a mounting base 501. The back of both the first guard plate 1 and the second guard plate 2 are fixedly connected to the surface of the mounting base 501. A retaining seat 502 is movably connected to the inner cavity of the mounting base 501. A threaded tube 503 is fixedly connected to one side of the retaining seat 502. An adjusting screw 504 is threadedly connected to the inner cavity of the threaded tube 503. An adjusting disc is fixedly connected to the surface of the adjusting screw 504. An insertion hole is provided on one side of the adjusting disc. A limit ring is fixedly connected to one end of the threaded tube 503. The inner cavity of the limit ring is flush with the surface of the adjusting screw 504. The first guard plate 1 has a slot on one side, and the second guard plate 2 has an insert plate fixedly connected to the side facing the first guard plate 1. The surface of the insert plate is movably connected to the inner cavity of the slot. The mounting base 501 has magnetic grooves on both sides of its inner cavity. The card holder 502 has magnetic blocks fixedly connected to both sides of its inner cavity. The surface of the magnetic blocks is movably connected to the inner cavity of the magnetic groove. The drainage hole 409 has a sealing ring in its inner cavity. Magnetic rings are fixedly connected to the edges on both sides of the drainage hole 409. An arc-shaped plate is fixedly connected to one side of both the first guard plate 1 and the second guard plate 2. One side of the arc-shaped plate is fixedly connected to the surface of the splicing frame 403.

[0032] Specifically, the support assembly 5 consists of a mounting base 501, a retaining seat 502, a threaded tube 503, and an adjusting screw 504. The mounting base 501 is fixed to the back of the first protective plate 1 and the second protective plate 2. The retaining seat 502 is movably embedded into the inner cavity of the mounting base 501. The threaded tube 503 is fixedly connected to the retaining seat 502. The adjusting screw 504 is screwed into the threaded tube 503. By rotating the adjusting screw 504, its extension length can be changed, thereby making the first protective plate 1 and the second protective plate 2 press tightly against the side wall of the pit. This assembly is the first protective plate... Plate 1 and the second protective plate 2 provide adjustable back support, effectively transferring the lateral earth pressure of the foundation pit to the internal support system, avoiding local overload deformation of the first protective plate 1 and the second protective plate 2. An adjusting disc is fixedly connected to the tail of the adjusting screw 504, and an insertion hole is opened on the side of the disc. During construction, a lever (such as a steel bar) can be inserted into the insertion hole, and the adjusting screw 504 can be easily rotated using the lever principle to achieve precise fine adjustment of the length. A limit ring is fixed at one end of the threaded tube 503, and its inner cavity is movably connected to the surface of the adjusting screw 504. The limiting ring does not obstruct the rotation of the adjusting screw 504, but it prevents the adjusting screw 504 from radially running or completely dislodging from the threaded tube 503 during rotation. A slot is opened on one side of the first guard plate 1, and an insert plate is fixed on the corresponding side of the second guard plate 2. When the two guard plates are assembled, the insert plate is inserted into the slot of the adjacent guard plate to form a preliminary positioning and connection. Before final fastening by the splicing component 4, the guard plates are quickly and initially aligned, simplifying the installation process and improving the assembly efficiency. Magnetic grooves are opened on both sides of the inner cavity of the mounting base 501, and magnetic blocks are fixed on both sides of the card holder 502. When the card holder 502 is placed into the mounting base 501, the magnetic blocks are automatically attracted and positioned in the magnetic grooves under the action of magnetic force. Before the screw 504, the support component 5 is quickly and temporarily fixed in the working position using magnetic force, which facilitates subsequent operations by construction personnel. This is especially advantageous in scenarios where it is difficult to operate with both hands at height. A sealing ring (such as a rubber ring) is set in the inner cavity of the drainage hole 409, and magnetic rings are fixed on both sides of the drainage hole 409. When it is necessary to install an external drainage pipe, the pipe port can be positioned with the assistance of the magnetic ring and the sealing ring can be pressed tightly. The sealing ring can effectively prevent groundwater from leaking from the gap between the drainage pipe and the drainage hole 409, ensuring that the accumulated water can only be discharged in an orderly manner through the pipe. The arc plate acts as a reinforcing rib, which enhances the structural strength of the connection between the guard plate and the splicing frame 403, making this key stress node more able to withstand the bending moment and shear force brought by the soil pressure.

[0033] The working principle of this utility model is as follows: First, the first protective plate 1 and the second protective plate 2 are initially aligned using insert plates and slots. Then, they are spliced ​​using the snap-fit ​​plate 402 in the splicing assembly 4. The splicing plate 404 is inserted into the splicing frame 403 on one side of the first protective plate 1 and the second protective plate 2, and the adjacent protective plates are tightened and fixed by the mounting bolts 407 and nuts 408 to form a continuous and sealed support wall. The seepage holes 3 on the surface of the protective plate can guide some groundwater into the cavity behind the plate, relieving hydrostatic pressure. The bottom drainage holes 409 are connected to the external drainage pipe through sealing rings and magnetic rings to achieve orderly drainage. After the support assembly 5 is quickly positioned by the magnetic block, the adjusting screw 504 is rotated to make it press against the side wall of the foundation pit, forming an adjustable support system. This structure effectively solves the problems of water seepage and insufficient rigidity of traditional steel sheet pile interlocking joints through multiple seals and rigid connections, achieving integrated seepage prevention and support.

[0034] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A seepage-proof deep foundation pit steel sheet pile support structure, comprising a first protective plate (1), characterized in that: A second protective plate (2) is provided on one side of the first protective plate (1), and a water seepage hole (3) is provided on one side of both the first protective plate (1) and the second protective plate (2), and a splicing component (4) is provided between the first protective plate (1) and the second protective plate (2). The splicing assembly (4) includes a fixing strip (401). The inner walls of the first guard plate (1) and the second guard plate (2) are fixedly connected to the surface of the fixing strip (401). A snap-fit ​​plate (402) is movably connected to one side of the fixing strip (401). A splicing frame (403) is fixedly connected to one side of the first guard plate (1) and the second guard plate (2). A splicing plate (404) is provided in the inner cavity of the splicing frame (403). A threaded seat (405) is fixedly connected to the back of the first guard plate (1). A fixing seat (406) is fixedly connected to the back of the second guard plate (2). An installation bolt (407) is passed through the inner cavity of the fixing seat (406). A nut (408) is threadedly connected to one side of the surface of the installation bolt (407). Drainage holes (409) are provided at the bottom of the opposite side of the first guard plate (1) and the second guard plate (2).

2. The seepage-proof deep foundation pit steel sheet pile support structure according to claim 1, characterized in that: The back of the first guard plate (1) and the second guard plate (2) are provided with a support component (5). The support component (5) includes a mounting base (501). The back of the first guard plate (1) and the second guard plate (2) are fixedly connected to the surface of the mounting base (501). The inner cavity of the mounting base (501) is movably connected to a retaining seat (502). A threaded tube (503) is fixedly connected to one side of the retaining seat (502). An adjusting screw (504) is threadedly connected to the inner cavity of the threaded tube (503).

3. The seepage-proof deep foundation pit steel sheet pile support structure according to claim 2, characterized in that: An adjustment disc is fixedly connected to the surface of the adjustment screw (504), and an insertion hole is provided on one side of the adjustment disc.

4. The seepage-proof deep foundation pit steel sheet pile support structure according to claim 2, characterized in that: One end of the threaded tube (503) is fixedly connected to a limiting ring, and the inner cavity of the limiting ring is movably connected to the surface of the adjusting screw (504).

5. The seepage-proof deep foundation pit steel sheet pile support structure according to claim 1, characterized in that: A slot is provided on one side of the first guard plate (1), and an insert plate is fixedly connected to the side of the second guard plate (2) facing the first guard plate (1). The surface of the insert plate is movably connected to the inner cavity of the slot.

6. The seepage-proof deep foundation pit steel sheet pile support structure according to claim 2, characterized in that: The mounting base (501) has magnetic grooves on both sides of its inner cavity, and magnetic blocks are fixedly connected to both sides of the card holder (502). The surface of the magnetic blocks is movably connected to the inner cavity of the magnetic grooves.

7. The seepage-proof deep foundation pit steel sheet pile support structure according to claim 1, characterized in that: The inner cavity of the drain hole (409) is provided with a sealing ring, and magnetic rings are fixedly connected to the edges on both sides of the drain hole (409).

8. The seepage-proof deep foundation pit steel sheet pile support structure according to claim 1, characterized in that: One side of the first guard plate (1) and the second guard plate (2) are fixedly connected to an arc plate, and one side of the arc plate is fixedly connected to the surface of the splicing frame (403).

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