Deep foundation pit drainage-free construction slope protection device
The mechanical structure-based deep foundation pit drainage-free construction slope protection device solves the problems of steel sheet pile deformation and tilting and the shortcomings of traditional drainage methods, achieving stable slope support and resource conservation, and improving construction safety and ecological protection.
Patent Information
- Application Number
- CN202511462898.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-14
- Publication Date
- 2025-11-28
AI Technical Summary
In traditional deep foundation pit construction, the bottom of steel sheet piles is prone to deformation and tilting, leading to slope instability. In addition, traditional drainage methods have problems such as high construction difficulty, waste of resources, and ecological impact.
The deep foundation pit slope protection device with mechanical structure, which does not require drainage, forms a three-dimensional support through the first and second protection mechanisms, replacing the traditional drainage layer. It includes a first connecting rod, a connecting seat, a limiting part, and a motor-driven connecting rope system to achieve stable slope support.
It reduces the risk of slope instability, decreases groundwater treatment procedures, and improves construction safety and environmental friendliness.
Smart Images
Figure CN121024085A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of slope protection technology, and in particular relates to a deep foundation pit slope protection device that does not require drainage. Background Technology
[0002] In traditional deep foundation pit construction, to prevent slope instability and ensure construction safety, common protective measures include setting a reasonable slope, setting slope protection, steel sheet pile foundation pit slope support, and lowering the groundwater level. During construction, as the excavation depth of the foundation pit increases, the stability protection of the slope and the drainage of the foundation pit become increasingly difficult, as do the earthwork excavation and transportation, which can easily lead to safety accidents.
[0003] Existing devices subject the bottom of sheet piles used in deep foundation pit protection to greater thrust from the ground, making them more prone to deformation and tilting at the bottom, which is detrimental to the stability of the foundation pit. Summary of the Invention
[0004] The purpose of this invention is to provide a slope protection device for deep foundation pit construction without drainage, so as to solve the problems existing in the prior art.
[0005] To achieve the above objectives, the present invention provides the following solution: The present invention provides a deep foundation pit slope protection device without drainage, comprising a foundation, a slope body on the foundation, a stepped surface on the slope body, a plurality of protective plates arranged side by side on the slope body, a first protective mechanism symmetrically provided at the bottom of the protective plate, the first protective mechanism including a first connecting rod fixedly connected to the stepped surface, a first connecting seat slidably connected to the first connecting rod, a first limiting part between the first connecting seat and the first connecting rod, a first abutting part at the end of the first connecting seat near the protective plate, the first abutting part abutting against the protective plate, a second protective mechanism at the top of the protective plate, the second protective mechanism being fixedly connected to the stepped surface adjacent to it.
[0006] Optionally, the first connecting rod is provided with a plurality of first grooves symmetrically spaced apart, the first connecting seat is provided with a first sliding groove, the first connecting rod is slidably connected in the first sliding groove, the two sides of the first sliding groove are provided with second sliding grooves symmetrically, the first limiting part includes a limiting plate slidably connected in the second sliding groove, the limiting plate is slidably connected to the first groove, the first connecting seat is provided with a first cavity symmetrically arranged in the first connecting seat, the first cavity communicates with the second sliding groove, and the side of the limiting plate away from the first groove is provided with a first driving member.
[0007] Optionally, the first driving component includes a connecting rope fixed to the limiting plate, with a first connecting disc wound around one end of the connecting rope away from the limiting plate, an output shaft of a first motor fixed to one end of the first connecting disc, the first motor fixed to the bottom surface of the first cavity, and first springs symmetrically fixed to both sides of the limiting plate away from the first groove, the first springs being fixed to the interior of the first cavity, and the connecting rope located between the two first springs.
[0008] Optionally, a guide wheel is installed on the side wall of the first cavity away from the second slide groove. The guide wheel is located between the two first springs, and the connecting rope passes through the guide wheel.
[0009] Optionally, the limiting plate has multiple limiting holes at equal intervals on one side near the first groove. The first connecting rod is hollow inside. The bottom of the two first grooves located at the same horizontal position is provided with a second limiting member. The second limiting member includes a first connecting plate fixedly connected inside the first connecting rod. A second connecting plate is fixedly connected to the center of the top surface of the first connecting plate. A first electric telescopic rod is fixedly connected to both sides of the second connecting plate. The first electric telescopic rod passes through the first groove and is adapted to the limiting holes.
[0010] Optionally, the first abutting part includes a first abutting seat, which is hinged to one end of the first connecting seat near the protective plate, and the first abutting seat abuts against the protective plate.
[0011] The optional second protective mechanism includes a third connecting plate fixed to the step surface. The third connecting plate is symmetrically provided with multiple sets of second limiting parts. The second limiting part includes a second connecting seat symmetrically provided on both sides of the protective plate. The bottom surface of the second connecting seat away from the third connecting plate is fixedly connected to the third connecting seat, and a second abutment seat is slidably connected inside the third connecting seat.
[0012] Optionally, the third connecting seat is provided with a second cavity, the top surface of the second abutment seat is slidably connected to the second cavity, and a second spring is fixedly connected to the third connecting seat, the second spring being fixedly connected to the top surface of the third connecting seat.
[0013] Optionally, the protective plate is symmetrically provided with rivets, which are fixedly connected to the slope body.
[0014] Optionally, a fourth connecting seat is fixedly connected to the bottom surface of the first connecting rod, and the fourth connecting seat is fixedly connected to the stepped surface.
[0015] This invention discloses the following technical effects: the protective plate is connected to the step surface through a first bottom protective mechanism, a first connecting rod is fixed to the step surface, and a first connecting seat slides along the rod to adjust its horizontal position. After being fixed by a first limiting part, the first abutting part abuts against the bottom of the protective plate to form support; the second top protective mechanism is fixed to the adjacent step surface through a third connecting plate, forming a double-layer protective structure. The first and second protective mechanisms form a three-dimensional support, reducing the risk of slope instability. The mechanical structure replaces the traditional drainage layer, reducing groundwater treatment procedures. Attached Figure Description
[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application. In the drawings:
[0017] Figure 1 This is a schematic diagram of the deep foundation pit slope protection device without drainage according to the present invention;
[0018] Figure 2 This is a schematic diagram of the internal structure of the first connecting seat of the present invention;
[0019] Figure 3 This is a schematic diagram of the internal structure of the third connector of the present invention.
[0020] In the diagram: 1. Foundation; 2. Slope body; 3. Step surface; 4. Protective plate; 5. First connecting rod; 6. First connecting seat; 7. First groove; 8. First slide; 9. Limiting plate; 10. First cavity; 11. Connecting rope; 12. First connecting disc; 13. First motor; 14. First spring; 15. Guide wheel; 16. Limiting hole; 17. First connecting plate; 18. Second connecting plate; 19. First electric telescopic rod; 20. First abutment seat; 21. Third connecting plate; 22. Second connecting seat; 23. Third connecting seat; 24. Second abutment seat; 25. Second cavity; 26. Second spring; 27. Rivet; 28. Fourth connecting seat. Detailed Implementation
[0021] As a core component of underground space development, deep foundation pit slope protection has consistently evolved around three main objectives: safety, economy, and environmental friendliness. In traditional construction techniques, drainage systems are considered crucial for maintaining slope stability. By installing open ditches, blind drains, or wellpoint dewatering systems, groundwater is diverted from the foundation pit, thereby reducing the impact of water pressure on the support structure. However, as urban underground space development progresses towards deeper and more complex geological conditions, traditional drainage methods are gradually revealing their inadequacies.
[0022] Currently, technological development in the industry is showing two parallel directions: one is the optimization and improvement of traditional drainage processes, enhancing drainage efficiency through the application of new materials or structural innovation; the other is the exploration of disruptive drainage-free technologies, attempting to fundamentally eliminate dependence on drainage systems by changing support concepts and material properties. The latter has attracted widespread attention in recent years, and its core lies in building a slope protection system with self-waterproofing and self-adaptive capabilities.
[0023] Open ditch drainage, as the most basic method of dewatering, involves excavating trenches along the perimeter of the foundation pit or on the slope, using gravity flow to drain surface water and shallow groundwater. A typical structure includes trapezoidal or rectangular trenches with a crushed stone filter layer at the bottom and brick or precast block supports on the trench walls. While this method is simple, it has significant space limitations: in narrow foundation pits, the trench occupies the effective working surface, affecting earthwork excavation and structural construction; in soft soil strata, the trench walls are prone to collapse, requiring additional support measures.
[0024] Traditional drainage systems have a dual impact on the geological environment: on the one hand, they improve slope stability by reducing water pressure; on the other hand, they may induce new engineering risks. In sandy soil layers, the seepage and damage effects of drainage ditches can lead to piping accidents; in cohesive soil layers, consolidation settlement caused by precipitation may cause existing pipelines to rupture. More seriously, the large amounts of groundwater pumped into municipal pipe networks not only waste water resources but may also cause regional water level drops and disrupt the ecological balance.
[0025] Application of prestressed fish belly beam system
[0026] This technology utilizes an arc-shaped steel beam at the top of the excavation pit, applying prestress to create a reverse load and actively balancing earth pressure. Compared to traditional concrete supports, it increases the headroom utilization rate by 65% and can be dynamically adjusted via a hydraulic servo system. In a Shenzhen project, after adopting this technology, the displacement control accuracy of the support structure reached 0.3 mm, significantly better than the standard requirement of 5 mm.
[0027] Integration and Innovation of Ecological Slope Protection Technology
[0028] By combining the soil-stabilizing effect of plant roots with engineering structures, a bio-engineering composite protection system is formed. The combined planting of vetiver grass and ryegrass can increase the slope's erosion resistance by three times; the introduction of three-dimensional HDPE mesh solves the soil and water conservation problem in the early stages of plant growth. This technology, applied in the Chengdu Tianfu Airport project, not only met the slope stability requirements but also achieved a unity between landscape and ecology.
[0029] Deployment of distributed fiber optic sensor networks
[0030] Fiber optic measuring points are arranged every 2 meters along the crown beam to collect data on multiple parameters such as strain and temperature in real time. This technology breaks through the spatial limitations of traditional point sensors. In a project in Nanjing, it provided an early warning of accelerated deformation of 0.5 mm / day 72 hours in advance, buying valuable time for emergency response.
[0031] Improved efficiency of drone inspection system
[0032] Drones equipped with hyperspectral cameras can identify surface cracks as small as 0.1 millimeters, inspecting up to 5,000 square meters per day. Compared to manual inspection, this method is eight times more efficient and avoids the safety risks of working at heights. In the Guangzhou Financial City project, this technology successfully identified early concrete cracking, preventing potential accidents.
[0033] Deep foundation pit slope protection technology is undergoing a historic transformation from "passive defense" to "active control." Although significant progress has been made in innovative technologies such as PFS (Prestressed Solid Foam) roofing membranes and prestressed steel structures, technological gaps remain in areas such as adaptability to complex geological conditions and intelligent management throughout the entire lifecycle. Particularly in the field of drainage-free construction, a complete technical standard system has not yet been established, providing ample room for the development of new protection devices. In the future, it is necessary to strengthen collaborative innovation among industry, academia, and research institutions, focusing on breakthroughs in the deep integration of materials, structures, and monitoring systems to propel the industry towards the goal of zero leakage and zero accidents.
[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0036] Reference Figures 1 to 3 As shown, this embodiment provides a deep foundation pit slope protection device without drainage, including a foundation 1, a slope body 2 on the foundation 1, a stepped surface 3 on the slope body 2, and multiple protective plates 4 arranged side by side on the slope body 2. A first protective mechanism is symmetrically provided at the bottom of the protective plate 4. The first protective mechanism includes a first connecting rod 5 fixedly connected to the stepped surface 3. A first connecting seat 6 is slidably connected to the first connecting rod 5. A first limiting part is provided between the first connecting seat 6 and the first connecting rod 5. A first abutting part is provided at one end of the first connecting seat 6 near the protective plate 4. The first abutting part abuts against the protective plate 4. A second protective mechanism is provided at the top of the protective plate 4. The second protective mechanism is fixedly connected to the stepped surface 3 adjacent to it.
[0037] The protective plate 4 is connected to the step surface 3 via a bottom first protective mechanism. A first connecting rod 5 is fixed to the step surface 3, and a first connecting seat 6 slides along the rod to adjust its horizontal position. After being fixed by a first limiting part, the first abutting part abuts against the bottom of the protective plate 4 to form support. The top second protective mechanism is fixed to the adjacent step surface 3 via a third connecting plate 21, forming a double-layer protective structure. The first and second protective mechanisms form a three-dimensional support, reducing the risk of slope instability. The mechanical structure replaces the traditional drainage layer, reducing the need for groundwater treatment.
[0038] In a further optimized design, the first connecting rod 5 is provided with a plurality of first grooves 7 symmetrically spaced, the first connecting seat 6 is provided with a first sliding groove 8, the first connecting rod 5 is slidably connected in the first sliding groove 8, the two sides of the first sliding groove 8 are provided with second sliding grooves symmetrically, the first limiting part includes a limiting plate 9 slidably connected in the second sliding groove, the limiting plate 9 is slidably connected to the first groove 7, the first connecting seat 6 is provided with a first cavity 10 symmetrically, the first cavity 10 is connected to the second sliding groove, and the side of the limiting plate 9 away from the first groove 7 is provided with a first driving member.
[0039] The first connecting seat 6 is sleeved on the outside of the first connecting rod 5 through the first sliding groove 8. After sliding to the target position, the limiting plate 9 extends out from the second sliding groove and is inserted into the corresponding first groove 7 to achieve axial positioning.
[0040] In a further optimized design, the first driving component includes a connecting rope 11 fixed to the limiting plate 9. One end of the connecting rope 11 away from the limiting plate 9 is wound with a first connecting disc 12. One end of the first connecting disc 12 is fixed to the output shaft of a first motor 13. The first motor 13 is fixed to the bottom surface of the first cavity. First springs 14 are symmetrically fixed to both sides of the limiting plate 9 away from the first groove 7. The first springs 14 are fixed to the interior of the first cavity. The connecting rope 11 is located between the two first springs 14.
[0041] The first motor 13 is started to drive the first connecting plate 12 to rotate, and the connecting rope 11 is wound to pull the limiting plate 9 to compress the first spring 14 and disengage from the first groove 7; after adjustment, the motor reverses and the spring resets to push the limiting plate 9 into the new first groove 7.
[0042] In a further optimized design, a guide wheel 15 is installed on the side wall of the first cavity away from the second slide groove. The guide wheel 15 is located between the two first springs 14, and the connecting rope 11 passes through the guide wheel 15.
[0043] The connecting rope 11 passes around the guide wheel 15 to change the transmission direction, converting the horizontal tension into the vertical driving force of the limiting plate 9.
[0044] In a further optimized design, the limiting plate 9 has multiple limiting holes 16 at equal intervals on one side near the first groove 7. The first connecting rod 5 is hollow inside. The bottom of the two first grooves 7 located at the same horizontal position is provided with second limiting members. The second limiting members include a first connecting plate 17 fixedly connected inside the first connecting rod 5. A second connecting plate 18 is fixedly connected to the center of the top surface of the first connecting plate 17. A first electric telescopic rod 19 is fixedly connected to both sides of the second connecting plate 18. The first electric telescopic rod 19 passes through the first groove 7 and is adapted to the limiting holes 16.
[0045] When the limiting plate 9 engages with the first groove 7, the first electric telescopic rod 19 simultaneously extends and inserts into the limiting hole 16, forming a mechanical-electric double locking. This limits the positions of the first abutment seat 20 and the first connecting seat 6.
[0046] The scheme is further optimized. The first abutting part includes a first abutting seat 20. The first abutting seat 20 is hinged to the end of the first connecting seat 6 near the protective plate 4, and the first abutting seat 20 abuts against the protective plate 4.
[0047] The first abutment seat 20 adapts to the angle of the protective plate 4 via a hinge. When the slope undergoes slight deformation, the abutment seat rotates to maintain a contact surface of ≥70%. The angle adjustment range is ±15°, and the stress concentration factor is reduced to 1.2.
[0048] The scheme is further optimized. The second protective mechanism includes a third connecting plate 21 fixed to the step surface 3. Multiple sets of second limiting parts are symmetrically arranged on the third connecting plate. The second limiting part includes a second connecting seat 22 symmetrically arranged on both sides of the protective plate 4. A third connecting seat 23 is fixedly connected to the bottom surface of the second connecting seat 22 away from the third connecting plate 21. A second abutment seat 24 is slidably connected inside the third connecting seat 23.
[0049] The second connecting seat 22 clamps the top two sides of the protective plate 4, and the second abutment seat 24 slides inside the third connecting seat 23, buffering the vertical impact through the second spring 26.
[0050] In a further optimized design, a second cavity 25 is provided inside the third connecting seat 23, and the top surface of the second abutment seat 24 is slidably connected to the second cavity 25. A second spring 26 is fixedly connected inside the third connecting seat 23, and the second spring 26 is fixedly connected to the top surface of the third connecting seat 23.
[0051] When the protective plate 4 is subjected to lateral earth pressure, the second abutment seat 24 compresses the second spring 26, and the stiffness of the second spring 26 increases stepwise with the amount of deformation.
[0052] The design was further optimized by symmetrically installing rivets 27 on the protective plate 4, which are fixedly connected to the slope body 2. The rivets 27 penetrate the protective plate 4 and insert into the slope body 2, forming a mechanical interlocking structure. After riveting, the joint is sealed with adhesive.
[0053] In a further optimized design, a fourth connecting seat 28 is fixedly connected to the bottom surface of the first connecting rod 5, and the fourth connecting seat 28 is fixedly connected to the step surface 3. The fourth connecting seat 28 is fixed to the step surface 3 by chemical anchors, and high-strength grout is injected after the first connecting rod 5 is inserted.
[0054] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.
[0055] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims
1. A deep foundation pit slope protection device without drainage, comprising a foundation (1), characterized in that: The foundation (1) is provided with a slope body (2), the slope body (2) is provided with a stepped surface (3), the slope body (2) is provided with a plurality of protective plates (4) arranged side by side, the bottom of the protective plate (4) is symmetrically provided with a first protective mechanism, the first protective mechanism includes a first connecting rod (5) fixedly connected to the stepped surface (3), the first connecting rod (5) is slidably connected with a first connecting seat (6), the first connecting seat (6) and the first connecting rod (5) are provided with a first limiting part, the first connecting seat (6) is provided with a first abutting part at one end near the protective plate (4), the first abutting part abuts against the protective plate (4), the top of the protective plate (4) is provided with a second protective mechanism, the second protective mechanism is fixedly connected to the stepped surface (3) adjacent to it.
2. The deep foundation pit slope protection device without drainage as described in claim 1, characterized in that: The first connecting rod (5) is provided with a plurality of first grooves (7) symmetrically and equally spaced. The first connecting seat (6) is provided with a first sliding groove (8). The first connecting rod (5) is slidably connected in the first sliding groove (8). The first sliding groove (8) is provided with second sliding grooves symmetrically on both sides. The first limiting part includes a limiting plate (9) slidably connected in the second sliding groove. The limiting plate (9) is slidably connected to the first groove (7). The first connecting seat (6) is provided with a first cavity (10) symmetrically. The first cavity (10) is connected to the second sliding groove. The limiting plate (9) is provided with a first driving member on the side away from the first groove (7).
3. The deep foundation pit slope protection device without drainage as described in claim 2, characterized in that: The first driving component includes a connecting rope (11) fixed to the limiting plate (9). One end of the connecting rope (11) away from the limiting plate (9) is wound with a first connecting disc (12). One end of the first connecting disc (12) is fixed to the output shaft of a first motor (13). The first motor (13) is fixed to the bottom surface of the first cavity (10). The limiting plate (9) is symmetrically fixed to two sides away from the first groove (7) with first springs (14). The first springs (14) are fixed to the inside of the first cavity (10). The connecting rope (11) is located between the two first springs (14).
4. The deep foundation pit slope protection device without drainage as described in claim 3, characterized in that: A guide wheel (15) is installed on the side wall of the first cavity (10) away from the second slide groove. The guide wheel (15) is located between the two first springs (14), and the connecting rope (11) passes through the guide wheel (15).
5. The deep foundation pit slope protection device without drainage as described in claim 4, characterized in that: The limiting plate (9) has a plurality of limiting holes (16) at equal intervals on one side near the first groove (7). The first connecting rod (5) is hollow inside. The bottom of the two first grooves (7) located at the same horizontal position is provided with a second limiting member. The second limiting member includes a first connecting plate (17) fixed in the first connecting rod (5). A second connecting plate (18) is fixed to the center of the top surface of the first connecting plate (17). A first electric telescopic rod (19) is fixed to both sides of the second connecting plate (18). The first electric telescopic rod (19) passes through the first groove (7) and is adapted to the limiting holes (16).
6. The deep foundation pit slope protection device without drainage as described in claim 1, characterized in that: The first abutting part includes a first abutting seat (20), which is hinged to the end of the first connecting seat (6) near the protective plate (4), and the first abutting seat (20) abuts against the protective plate (4).
7. The deep foundation pit slope protection device without drainage as described in claim 1, characterized in that: The second protective mechanism includes a third connecting plate (21) fixedly attached to the step surface (3). The third connecting plate (21) is symmetrically provided with multiple sets of second limiting parts. The second limiting part includes a second connecting seat (22) symmetrically provided on both sides of the protective plate (4). The bottom surface of the second connecting seat (22) away from the third connecting plate (21) is fixedly connected to a third connecting seat (23). A second abutment seat (24) is slidably connected inside the third connecting seat (23).
8. The deep foundation pit slope protection device without drainage as described in claim 7, characterized in that: The third connecting seat (23) is provided with a second cavity (25), and the top surface of the second abutment seat (24) is slidably connected in the second cavity (25). A second spring (26) is fixedly connected in the third connecting seat (23), and the second spring (26) is fixedly connected to the top surface of the third connecting seat (23).
9. The deep foundation pit slope protection device without drainage as described in claim 1, characterized in that: The protective plate (4) is symmetrically provided with rivets (27), and the rivets (27) are fixedly connected to the slope body (2).
10. The deep foundation pit slope protection device without drainage as described in claim 1, characterized in that: The bottom surface of the first connecting rod (5) is fixedly connected to a fourth connecting seat (28), and the fourth connecting seat (28) is fixedly connected to the step surface (3).