A coastal facies soft soil vacuum preloading foundation treatment plus protective structure

Abstract

The present application belongs to the technical field of foundation construction, and in particular to a coastal soft soil vacuum preloading foundation treatment and protection structure, which comprises a positioning frame, a barrier plate and a cover plate. The bottom of the positioning frame is provided with a plurality of first ground nails, and the positioning frame is provided with a positioning slot. The barrier plate is inserted into the positioning slot. The left and right sides of the barrier plate are provided with side slots, and the inside of the side slots is provided with a sealing plate. The bottom of the cover plate and the sealing plate are provided with an extrusion mechanism, which can drive the sealing plate to extend outside the barrier plate. Through the cooperation of the above structure, a plurality of barrier plates are inserted into the ground around the reinforced area to form a continuous hard protection. The sealing plates on both sides of the barrier plate are extended outward, and a certain seal is formed at the gap. Thus, the reinforced area and the external area are blocked. Not only is the vacuum suction force prevented from extending to the outside of the reinforced area to cause harm to adjacent buildings, but also the vacuum suction force of the reinforced area is more focused, improving the adsorption and discharge capacity of pore water.

Description

Technical Field

[0001] This invention belongs to the field of foundation construction technology, specifically a vacuum preloading foundation treatment and reinforcement structure for coastal soft soil. Background Technology

[0002] With the rapid economic and social development of coastal areas in my country, a large number of infrastructure projects, such as ports, highways, airports, and land reclamation projects, inevitably need to be carried out on soft soil foundations in coastal areas. Coastal soft soil typically possesses significant engineering characteristics such as high water content, large void ratio, high compressibility, low strength, strong thixotropy, and low permeability. Direct construction on such natural foundations faces a series of severe challenges, including insufficient bearing capacity, large and prolonged post-construction settlement, and poor stability, failing to meet the requirements of buildings and structures for foundation stability and deformation control. Therefore, effective reinforcement treatment of such soft soil foundations is essential. Vacuum preloading is currently one of the most effective methods for treating such soft soil foundations.

[0003] Traditional vacuum preloading involves laying a sand cushion layer and a sealing membrane on the surface of the soft soil foundation to be treated. A vacuum is then created in the soil to generate negative pressure, prompting pore water to drain out and thus reinforcing the foundation. However, coastal soft soils have extremely low permeability. Under vacuum loading, the soil around the reinforced area will experience horizontal displacement pointing inwards, leading to cracks and even settlement at the outer edge of the reinforced area, potentially endangering nearby buildings, underground pipelines, or roads. Simultaneously, the vacuum negative pressure dissipates rapidly in the soil, making it difficult to maintain effectively. This significantly reduces the soil's ability to absorb and drain pore water, impacting the efficiency and effectiveness of the reinforcement.

[0004] Therefore, the present invention provides a vacuum preloading foundation treatment and reinforcement structure for coastal soft soil. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a vacuum preloading foundation treatment and reinforcement structure for coastal soft soil, comprising a positioning frame, a barrier plate and a cover plate; The bottom of the positioning frame is provided with multiple first ground nails, the positioning frame is provided with positioning slots, the barrier plate is inserted into the positioning slots, the left and right sides of the barrier plate are provided with side grooves, the inside of the side grooves is provided with sealing plates, the bottom of the cover plate and the sealing plate are provided with a pressing mechanism, the pressing mechanism can drive the sealing plate to extend out of the outside of the barrier plate. Multiple inner grooves are provided on both the front and rear sides of the barrier plate. Hook plates are installed inside the inner grooves through an ejection mechanism. A transmission mechanism is provided at the bottom of the cover plate. The transmission mechanism and the ejection mechanism work together to drive the hook plates to extend out of the outer side of the barrier plate.

[0007] As a preferred technical solution of this application, the extrusion mechanism includes a first wedge plate slidably installed inside the side groove, and a sealing plate installed on the first wedge plate. A second wedge plate is installed at the bottom of the cover plate, and the second wedge plate and the first wedge plate are extruded together.

[0008] As a preferred technical solution of this application, the ejection mechanism includes a screw hole opened inside the hook plate, a screw rod rotatably installed inside the inner groove, and the end of the screw rod is threaded into the screw hole, and a driven gear is installed on the outer surface of the screw rod.

[0009] As a preferred technical solution of this application, the transmission mechanism includes a connecting groove formed inside the barrier plate, and the connecting groove is connected to the inner groove. A connecting plate is installed at the bottom of the cover plate, and a protruding strip is provided on the outer surface of the connecting plate. A drive rack that cooperates with the driven gear is provided on the lower side of the outer surface of the protruding strip.

[0010] As a preferred technical solution of this application, an anchor rod is installed on the outer surface of the cover plate through a connecting seat, and a second ground nail is provided at the end of the anchor rod.

[0011] As a preferred technical solution of this application, a tapered portion is provided at the end of one side of the barrier plate, and a slot is provided at the end of the other side of the barrier plate. The ends of the inner walls on both sides of the slot are provided with a second inclined portion. When the conical part is inserted into the slot, the second inclined surfaces on both sides abut against the conical part.

[0012] As a preferred technical solution of this application, a plurality of springs are connected to the outer surface of the first wedge plate, and the ends of the springs are connected to the inner wall of the side groove.

[0013] As a preferred technical solution of this application, the top of the barrier plate is provided with a top plate, and the positioning frame, the top plate and the cover plate are fixed together by long rod bolts.

[0014] As a preferred technical solution of this application, the bottom of the barrier plate is provided with a first inclined surface, and the end of the hook plate is provided with a third inclined surface.

[0015] The beneficial effects of this invention are as follows: 1. The present invention relates to a vacuum preloading foundation treatment and reinforcement structure for coastal soft soil. By inserting multiple barrier plates around the reinforcement area into the ground to form a continuous rigid protection, and with the setting of the extrusion mechanism, the sealing plates on both sides of the barrier plates extend outward to form a certain seal at the gaps. This isolates the reinforcement area from the external area, not only preventing the vacuum suction from extending to the outside of the reinforcement area and causing damage to adjacent buildings, but also making the vacuum suction in the reinforcement area more focused, thereby improving the adsorption and discharge capacity of pore water.

[0016] 2. The present invention provides a vacuum preloading foundation treatment and reinforcement structure for coastal soft soil. Through the cooperation of the jacking mechanism and the transmission mechanism, the hook plates on both sides of the barrier plate can extend outward and penetrate into the soil, effectively reducing the occurrence of settlement in the later stage and ensuring the stability of the foundation. Attached Figure Description

[0017] The invention will now be further described with reference to the accompanying drawings.

[0018] Figure 1 This is a perspective view of the present invention; Figure 2 This is a front sectional view of the present invention; Figure 3 This is a schematic cross-sectional view of the barrier plate in this invention; Figure 4 yes Figure 3 Enlarged view of a portion of point A in the middle; Figure 5 This is a schematic diagram of the positioning frame in this invention; Figure 6 This is a schematic diagram of the cover plate in this invention; Figure 7 yes Figure 6 Enlarged view of a section at point B in the middle; Figure 8 This is a schematic diagram of the barrier plate in this invention; Figure 9 This is a schematic diagram of the sealing plate structure in this invention; Figure 10 This is a schematic diagram of the connection between the two sealing plates in this invention.

[0019] In the diagram: 1. Positioning frame; 101. Positioning slot; 102. First ground stake; 2. Barrier plate; 2001. First inclined section; 201. Side groove; 202. Sealing plate; 2021. Conical part; 2022. Slot; 2023. Second inclined section; 203. Inner groove; 204. Hook plate; 2041. Third inclined section; 205. Top plate; 3. Cover plate; 4. Extrusion mechanism; 401. First wedge plate; 402. Second wedge plate; 403. Spring; 5. Ejection mechanism; 501. Screw hole; 502. Screw; 503. Driven gear; 6. Transmission mechanism; 601. Connecting groove; 602. Connecting plate; 603. Protrusion; 604. Drive rack; 7. Anchor bolt; 701. Second ground stake; 702. Connecting seat. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] Example 1: As Figures 1 to 3As shown, an embodiment of the present invention provides a vacuum preloading foundation treatment and reinforcement structure for coastal soft soil, comprising a positioning frame 1, a barrier plate 2, and a cover plate 3. The bottom of the positioning frame 1 is provided with multiple first ground nails 102. The positioning frame 1 is provided with a positioning slot 101. The barrier plate 2 is inserted into the positioning slot 101. Side grooves 201 are provided on both the left and right sides of the barrier plate 2. A sealing plate 202 is provided inside the side groove 201. A pressing mechanism 4 is provided between the bottom of the cover plate 3 and the sealing plate 202. The pressing mechanism 4 can drive the sealing plate 202 to extend out of the outside of the barrier plate 2. Multiple inner grooves 203 are provided on both the front and rear sides of the barrier plate 2. A hook plate 204 is installed inside the inner groove 203 through an ejection mechanism 5. A transmission mechanism 6 is provided at the bottom of the cover plate 3. The transmission mechanism 6 and the ejection mechanism 5 are driven to drive the hook plate 204 to extend out of the outside of the barrier plate 2.

[0022] The positioning frame 1 is fixed to the ground by the first ground nail 102. The barrier plate 2 is inserted into the ground through the positioning slot 101. The positioning slot 101 limits and guides the multiple barrier plates 2 to ensure that they can be arranged side by side with precise positioning to avoid tilting and prevent affecting the subsequent sealing. After the barrier plates 2 are installed, the cover plate 3 is installed. The pressing mechanism 4 drives the sealing plate 202 to extend outward. The sealing plates 202 between two adjacent barrier plates 2 contact each other to form a certain seal, thereby isolating the reinforced area from the external area. This not only prevents the vacuum suction from extending to the outside of the reinforced area and causing damage to nearby buildings, but also makes the vacuum suction in the reinforced area more focused, improving the adsorption and discharge capacity of pore water. Furthermore, under the action of the barrier plates 2, groundwater in the external area can be blocked to the outside, reducing the flow into the reinforced area and ensuring the stability of the foundation. Furthermore, due to the sealing effect of the barrier plate 2 on the periphery of the reinforced area, the vacuum suction can extend downwards, which can pump water into deeper soil and further improve the stability of the foundation.

[0023] Furthermore, through the installation of the ejection mechanism 5 and the transmission mechanism 6, when the cover plate 3 is installed, multiple hook plates 204 on both sides of the barrier plate 2 can extend outward and be inserted laterally into the soil, thereby increasing the fastening effect between the barrier plate 2 and the soil. When the barrier plate 2 sinks downward, or when the soft soil consolidates and causes ground subsidence, the hook plates 204 can provide upward resistance, effectively hooking the barrier plate 2 and preventing it from sinking with the soil, thus ensuring the stability and integrity of the foundation.

[0024] Example 2: Figures 3 to 4As shown in the comparative embodiment one, another embodiment of the present invention is as follows: the extrusion mechanism 4 includes a first wedge plate 401 slidably installed inside the side groove 201, and a sealing plate 202 is installed on the first wedge plate 401. A second wedge plate 402 is installed at the bottom of the cover plate 3. The second wedge plate 402 and the first wedge plate 401 are extruded and engaged. When the second wedge plate 402 is inserted into the side groove 201, the extrusion action of the inclined surfaces of the two can push the first wedge plate 401 to slide horizontally in the side groove 201, and cause the sealing plate 202 to extend outward and penetrate into the soil.

[0025] Multiple springs 403 are connected to the outer surface of the first wedge plate 401. The ends of the springs 403 are connected to the inner wall of the side groove 201. The springs 403 apply a pushing force to the first wedge plate 401, causing the sealing plate 202 to retract into the side groove 201 when the second wedge plate 402 is not inserted into the side groove 201. During the handling of the barrier plate 2, the preload of the springs 403 effectively suppresses any accidental loosening or shaking of the sealing plate 202, preventing it from colliding with the inner wall of the side groove 201 and ensuring its functional integrity. At the same time, the retracted state makes the barrier plate 2 have a regular shape, which is convenient for stacking and transportation. Furthermore, it reduces resistance when inserting the barrier plate 2 into the ground.

[0026] Working principle: After the barrier plate 2 is inserted into the ground, the second wedge plate 402 at the bottom of the cover plate 3 is inserted into the side groove 201. During the descent of the second wedge plate 402, the first wedge plate 401 is gradually squeezed, causing it to drive the sealing plate 202 to extend outward and penetrate into the soil. The sealing plate 202 is slidably connected to the inner wall of the side groove 201, so that it can only extend outward in the horizontal direction. When the sealing plates 202 of two adjacent barrier plates 2 are close, the end faces can completely contact each other, forming a sealing effect. The first wedge plate 401 and the second wedge plate 402 both have high-precision, low-roughness inclined surfaces, and the inclined surface angle is between 15 and 30 degrees, which can balance the horizontal thrust and vertical friction resistance, ensuring that while effectively pushing out the sealing plate (202), the cover plate (3) will not be difficult to install or jammed due to excessive friction.

[0027] Example 3: Figures 3 to 4 As shown in the comparative embodiment 2, another embodiment of the present invention is as follows: the ejection mechanism 5 includes a screw hole 501 opened inside the hook plate 204, a screw 502 is rotatably installed inside the inner groove 203, and the end of the screw 502 is threadedly installed in the screw hole 501. A driven gear 503 is installed on the outer surface of the screw 502. When the screw 502 rotates, the screw plate 204 can be driven to move horizontally and extend outward under the action of the threaded connection, and be driven into the soil.

[0028] The transmission mechanism 6 includes a connecting groove 601 inside the barrier plate 2, and the connecting groove 601 communicates with the inner groove 203. A connecting plate 602 is installed at the bottom of the cover plate 3. A protrusion 603 is provided on the outer surface of the connecting plate 602. A drive rack 604 that is in transmission cooperation with the driven gear 503 is provided on the lower side of the outer surface of the protrusion 603. When the connecting plate 602 is inserted into the connecting groove 601, the drive rack 604 contacts the driven gear 503 and drives it to rotate, thus driving the screw 502 to rotate and pushing the hook plate 204 to extend.

[0029] Working principle: After the barrier plate 2 is inserted into the ground, the connecting plate 602 at the bottom of the cover plate 3 is aligned with the connecting groove 601 and inserted. Since the drive rack 604 is located on the lower side of the protrusion 603, it can drive multiple driven gears 503 to rotate one by one during its descent. When the driven gears 503 rotate, they drive the screw 502 to rotate. Since the inner wall of the inner groove 203 plays a limiting role on the hook plate 204, the hook plate 204 can be driven to extend horizontally outward.

[0030] Example 4: Figure 1 and Figure 6 As shown in Comparative Embodiment 3, another embodiment of the present invention is as follows: An anchor rod 7 is installed on the outer surface of the cover plate 3 through the connecting seat 702, and a second ground nail 701 is provided at the end of the anchor rod 7. Through the setting of the anchor rod 7 and the second ground nail 701, a tensile force is provided for the cover plate 3, forming a constraint system that combines "blocking" and "pulling", which greatly restricts the lateral displacement of the soil in the reinforced area under the action of vacuum suction and protects the surrounding environment.

[0031] The top of the barrier plate 2 is provided with a top plate 205. The positioning frame 1, the top plate 205 and the cover plate 3 are fixed together by long bolts. After the positioning frame 1 is installed, a sealing gasket is placed on its surface. Then, after the top plate 205 is installed, a sealing gasket is placed on its surface. After the cover plate 3 is installed, long bolts are used to pass through the cover plate 3 and the top plate 205 in sequence and tighten them on the positioning frame 1 to form an integral structure. Since it is located above the ground and under the action of the sealing gasket, it can form a water-blocking barrier, which can effectively intercept and divert the surface runoff formed by ordinary rainfall and prevent it from overflowing into the reinforced area from the horizontal direction.

[0032] Example 5: Figure 3 and Figure 10As shown in Comparative Embodiment Four, another embodiment of the present invention is as follows: A tapered portion 2021 is provided at the end of one side of the sealing plate 202 of the barrier plate 2, and a slot 2022 is provided at the end of the other side of the sealing plate 202. The ends of the inner walls on both sides of the slot 2022 are provided with second inclined portions 2023. When the tapered portion 2021 is inserted into the slot 2022, the second inclined portions 2023 on both sides abut against the tapered portion 2021. Utilizing the mutual limiting effect of the sealing plates 202 on both sides, not only can a seal be achieved, but adjacent barrier plates 2 can also be connected together. The adjacent barrier plates 2 can mutually restrain each other, preventing individual displacement towards the reinforcement area and ensuring the overall sealing and barrier function. Furthermore, the tapered portion 2021 and the second inclined portions 2023 can reduce resistance, facilitating movement within the soil.

[0033] The bottom of the barrier plate 2 is provided with a first inclined surface 2001, and the end of the hook plate 204 is provided with a third inclined surface 2041, which can reduce resistance and facilitate the insertion of the barrier plate 2 and the hook plate 204 into the soil.

[0034] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0035] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "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. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum preloading foundation treatment and reinforcement structure for coastal soft soil, characterized in that: It includes a positioning frame (1), a barrier plate (2), and a cover plate (3); The bottom of the positioning frame (1) is provided with a plurality of first ground nails (102), the positioning frame (1) is provided with a positioning slot (101), the barrier plate (2) is inserted into the positioning slot (101), the left and right sides of the barrier plate (2) are provided with side grooves (201), the inside of the side grooves (201) is provided with a sealing plate (202), the bottom of the cover plate (3) and the sealing plate (202) are provided with a pressing mechanism (4), the pressing mechanism (4) can drive the sealing plate (202) to extend out of the outside of the barrier plate (2); The barrier plate (2) has multiple inner grooves (203) on both the front and rear sides. The inner groove (203) is equipped with a hook plate (204) through the ejection mechanism (5). The bottom of the cover plate (3) is provided with a transmission mechanism (6). The transmission mechanism (6) and the ejection mechanism (5) work together to drive the hook plate (204) to extend out of the outer side of the barrier plate (2).

2. The vacuum preloading foundation treatment and reinforcement structure for coastal soft soil according to claim 1, characterized in that: The extrusion mechanism (4) includes a first wedge plate (401) slidably installed inside the side groove (201), and the sealing plate (202) is installed on the first wedge plate (401). A second wedge plate (402) is installed at the bottom of the cover plate (3), and the second wedge plate (402) is extruded and engaged with the first wedge plate (401).

3. The vacuum preloading foundation treatment and reinforcement structure for coastal soft soil according to claim 1, characterized in that: The ejection mechanism (5) includes a screw hole (501) opened inside the hook plate (204), a screw (502) is rotatably installed inside the inner groove (203), and the end of the screw (502) is threaded in the screw hole (501), and a driven gear (503) is installed on the outer surface of the screw (502).

4. The vacuum preloading foundation treatment and reinforcement structure for coastal soft soil according to claim 3, characterized in that: The transmission mechanism (6) includes a connecting groove (601) opened inside the barrier plate (2), and the connecting groove (601) communicates with the inner groove (203). A connecting plate (602) is installed at the bottom of the cover plate (3). A protrusion (603) is provided on the outer surface of the connecting plate (602), and a drive rack (604) that is in transmission cooperation with the driven gear (503) is provided on the lower side of the outer surface of the protrusion (603).

5. The vacuum preloading foundation treatment and reinforcement structure for coastal soft soil according to claim 1, characterized in that: An anchor rod (7) is installed on the outer surface of the cover plate (3) via a connecting seat (702), and a second ground nail (701) is provided at the end of the anchor rod (7).

6. The vacuum preloading foundation treatment and reinforcement structure for coastal soft soil according to claim 1, characterized in that: The end of the sealing plate (202) on one side of the barrier plate (2) is provided with a tapered part (2021), and the end of the sealing plate (202) on the other side of the barrier plate (2) is provided with a slot (2022). The ends of the inner walls on both sides of the slot (2022) are provided with a second inclined part (2023). When the tapered portion (2021) is inserted into the slot (2022), the second inclined portions (2023) on both sides abut against the tapered portion (2021).

7. The vacuum preloading foundation treatment and reinforcement structure for coastal soft soil according to claim 2, characterized in that: The outer surface of the first wedge plate (401) is connected to a plurality of springs (403), and the ends of the springs (403) are connected to the inner wall of the side groove (201).

8. The vacuum preloading foundation treatment and reinforcement structure for coastal soft soil according to claim 1, characterized in that: The top of the barrier plate (2) is provided with a top plate (205), and the positioning frame (1), the top plate (205) and the cover plate (3) are fixed together by long rod bolts.

9. The vacuum preloading foundation treatment and reinforcement structure for coastal soft soil according to claim 1, characterized in that: The bottom of the barrier plate (2) is provided with a first inclined surface (2001), and the end of the hook plate (204) is provided with a third inclined surface (2041).

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