Coastal facies soft soil vacuum preloading foundation treatment protecting structure

Abstract

The invention belongs to the technical field of foundation construction, and particularly relates to a coastal facies soft soil vacuum preloading foundation treatment protecting structure which comprises a positioning frame, a barrier plate and a cover plate. A plurality of first ground nails are arranged at the bottom of the positioning frame, a positioning inserting groove is formed in the positioning frame, the blocking plate is inserted into the positioning inserting groove, side grooves are formed in the left side and the right side of the blocking plate, sealing plates are arranged in the side grooves, an extrusion mechanism is arranged between the bottom of the cover plate and the sealing plates, and the extrusion mechanism can drive the sealing plates to stretch out of the outer side of the blocking plate; through the structural cooperation, the multiple blocking plates are inserted into the ground around the reinforcing area to form continuous hard protection, and the extrusion mechanism is arranged in a matched mode, so that the sealing plates on the two sides of the blocking plates extend outwards, certain sealing is formed in the gaps, and therefore the reinforcing area can be blocked from the external area; the vacuum suction force is prevented from extending towards the outer side of the reinforcing area to damage adjacent buildings and the like, the vacuum suction force of the reinforcing area is more focused, and the adsorption and discharge capacity of pore water is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of foundation construction, and particularly relates to a coastal facies soft soil vacuum preloading foundation treatment and protection structure. BACKGROUND

[0002] With the rapid development of economy and society in the coastal areas of China, a large number of infrastructure constructions, such as port terminals, expressways, airports, reclamation projects and the like, inevitably need to be carried out on the coastal facies soft soil foundation. The coastal facies soft soil usually has the remarkable engineering properties of high water content, large void ratio, high compressibility, low strength, strong thixotropy and low permeability. Direct construction on such a natural foundation will face a series of severe challenges such as insufficient foundation bearing capacity, large and long-lasting post-construction settlement and poor stability, and cannot meet the requirements of buildings and structures on the stability and deformation control of the foundation. Therefore, the soft soil foundation must be effectively reinforced. The vacuum preloading method is one of the most effective methods for treating such soft soil foundation.

[0003] The traditional vacuum preloading method is to lay a sand cushion and a sealing film on the surface of the soft soil foundation to be treated, form negative pressure in the soil body by vacuum extraction, promote the discharge of pore water, and thus achieve the purpose of reinforcing the foundation. However, the permeability of the coastal facies soft soil is extremely low, and under the vacuum load, the soil body around the reinforced area will produce horizontal displacement directed to the inside of the reinforced area, resulting in cracks or even settlement of the ground at the outer edge of the reinforced area, which may endanger the adjacent buildings, underground pipelines or roads. At the same time, the vacuum negative pressure in the foundation soil body will quickly dissipate in all directions, and it is difficult to effectively maintain, resulting in a significant reduction in the adsorption and discharge capacity of the pore water, affecting the reinforcement efficiency and effect.

[0004] Therefore, the application provides a coastal facies soft soil vacuum preloading foundation treatment and protection structure. SUMMARY

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background.

[0006] The technical scheme adopted by the application to solve the technical problems is that the application provides a coastal facies soft soil vacuum preloading foundation treatment and protection structure, which comprises a positioning frame, a blocking 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 blocking plate is inserted into the positioning slot, side slots are formed on the left and right sides of the blocking plate, the inside of the side slots is provided with a sealing plate, and the bottom of the cover plate and the sealing plate are provided with an extrusion mechanism, which can drive the sealing plate to extend out of the outside of the blocking plate. A plurality of inner slots are formed on the front and back sides of the blocking plate, the inner slots are internally provided with a hook plate through an ejection mechanism, the bottom of the cover plate is provided with a transmission mechanism, and the transmission mechanism and the cover plate are in transmission cooperation and can drive the hook plate to extend out of the outside of the blocking plate.

[0007] As a preferred technical scheme of the present application, the extrusion mechanism comprises a first wedge-shaped plate slidingly installed inside the side groove, and a cover plate is installed on the first wedge-shaped plate, the bottom of the cover plate is provided with a second wedge-shaped plate, and the second wedge-shaped plate is extruded with the first wedge-shaped plate.

[0008] As a preferred technical scheme of the present application, the extrusion mechanism comprises a first wedge-shaped plate slidingly installed inside the side groove, and a cover plate is installed on the first wedge-shaped plate, the bottom of the cover plate is provided with a second wedge-shaped plate, and the second wedge-shaped plate is extruded with the first wedge-shaped plate.

[0009] As a preferred technical scheme of the present application, the transmission mechanism comprises a connecting groove formed in the blocking plate, and the connecting groove is communicated with the inner groove, the bottom of the cover plate is provided with a connecting plate, the outer surface of the connecting plate is provided with a convex strip, and the lower side of the outer surface of the convex strip is provided with a driving rack in transmission cooperation with the driven gear.

[0010] As a preferred technical scheme of the present application, the outer surface of the cover plate is provided with an anchor rod through a connecting seat, and the end of the anchor rod is provided with a second ground nail.

[0011] As a preferred technical scheme of the present application, the end of the cover plate on one side of the blocking plate is provided with a tapered portion, the end of the cover plate on the other side of the blocking plate is provided with a clamping groove, and the ends of the inner walls on both sides of the clamping groove are provided with second inclined surface portions. When the tapered portion is inserted into the clamping groove, the second inclined surface portions on both sides abut against the tapered portion.

[0012] As a preferred technical scheme of the present application, the outer surface of the first wedge-shaped plate is connected with a plurality of springs, and the ends of the springs are connected with the inner wall of the side groove.

[0013] As a preferred technical scheme of the present application, the top of the blocking plate is provided with a top plate, the positioning frame, the top plate and the cover plate are fixed together through a long rod bolt.

[0014] As a preferred technical scheme of the present application, the bottom of the blocking plate is provided with a first inclined surface portion, and the end of the hook plate is provided with a third inclined surface portion.

[0015] The beneficial effects of the present application are as follows: 1. The coastal soft soil vacuum preloading foundation treatment protection structure can form continuous hard protection by inserting a plurality of blocking plates around the reinforced area into the ground, and the setting of the extrusion mechanism makes the cover plates on both sides of the blocking plate outwardly extend to form a certain seal at the gap, so that the reinforced area and the external area are blocked, not only avoiding the extension of the vacuum suction force outside the reinforced area to cause harm to adjacent buildings, but also making the vacuum suction force of the reinforced area more focused, and improving the adsorption and discharge capacity of the pore water.

[0016] 2. The invention is a coastal soft soil vacuum preloading foundation treatment and protection structure, which can make the hook plates on both sides of the blocking plate extend outward and penetrate into the soil through the cooperation of the ejection mechanism and the transmission mechanism, effectively reducing the settlement in the later stage and ensuring the stability of the foundation. BRIEF DESCRIPTION OF DRAWINGS

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

[0018] Figure 1 is a perspective view of the invention; Figure 2 is a front view of the invention; Figure 3 is a sectional view of the blocking plate in the invention; Figure 4 is Figure 3 is a partial enlarged view of A in Figure 5 is a structural diagram of the positioning frame in the invention; Figure 6 is a structural diagram of the cover plate in the invention; Figure 7 is Figure 6 is a partial enlarged view of B in Figure 8 is a structural diagram of the blocking plate in the invention; Figure 9 is a structural diagram of the sealing plate in the invention; Figure 10 is an abutting diagram of the two sealing plates in the invention.

[0019] In the figure: 1, positioning frame; 101, positioning slot; 102, first ground spike; 2, blocking plate; 2001, first inclined surface part; 201, side groove; 202, sealing plate; 2021, conical part; 2022, clamping groove; 2023, second inclined surface part; 203, inner groove; 204, hook plate; 2041, third inclined surface part; 205, top plate; 3, cover plate; 4, extrusion mechanism; 401, first wedge-shaped plate; 402, second wedge-shaped plate; 403, spring; 5, ejection mechanism; 501, screw hole; 502, screw rod; 503, driven gear; 6, transmission mechanism; 601, connecting groove; 602, connecting plate; 603, protruding strip; 604, driving rack; 7, anchor rod; 701, second ground spike; 702, connecting seat. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, purposes and effects realized by the invention easy to understand, the invention will be further described below in combination with specific embodiments.

[0021] Example one: as Figures 1 to 3The embodiment of the present application is shown as a kind of coastal facies soft soil vacuum preloading foundation treatment plus protective structure, including positioning frame 1, barrier plate 2 and cover plate 3; The bottom of positioning frame 1 is provided with a plurality of first ground nails 102, and positioning frame 1 is provided with positioning slot 101, barrier plate 2 is inserted into positioning slot 101, and side groove 201 is formed on the left and right sides of barrier plate 2, and sealing plate 202 is arranged in side groove 201, and extrusion mechanism 4 is arranged between the bottom of cover plate 3 and sealing plate 202, and extrusion mechanism 4 can drive sealing plate 202 to extend outside barrier plate 2, and a plurality of inner grooves 203 are formed on the front and back sides of barrier plate 2, and hook plate 204 is installed in inner groove 203 through ejection mechanism 5, and transmission mechanism 6 is arranged at the bottom of cover plate 3, and transmission mechanism 6 and cover plate 3 are in transmission cooperation, which can drive hook plate 204 to extend outside barrier plate 2.

[0022] Positioning frame 1 is fixed to the ground through first ground nail 102, barrier plate 2 is inserted into the ground from positioning slot 101, and the limiting and guiding effect of positioning slot 101 ensures that a plurality of barrier plates 2 can be arranged side by side, and the position is accurate to avoid tilting and affecting subsequent sealing. When barrier plate 2 is installed, cover plate 3 is installed, and through the arrangement of extrusion mechanism 4, sealing plate 202 can be driven to extend outward, and sealing plate 202 between adjacent two barrier plates 2 contacts each other to form a certain sealing, so as to block the reinforced area and the external area, not only avoiding the extension of vacuum suction force outside the reinforced area to cause harm to adjacent buildings, but also making the vacuum suction force of the reinforced area more focused, improving the adsorption and discharge capacity of pore water. And under the action of barrier plate 2 in the later period, the underground water of the external area can be blocked outside, reducing the flow to the reinforced area, and protecting the stability of the foundation. And because the periphery of the reinforced area is sealed by barrier plate 2, the vacuum suction force can extend downward to play a role of pumping water to deeper soil, further improving the stability of the foundation.

[0023] And through the arrangement of ejection mechanism 5 and transmission mechanism 6, when installing cover plate 3, a plurality of hook plates 204 on both sides of barrier plate 2 can extend outward and horizontally into the soil, thereby increasing the fastening effect between barrier plate 2 and the soil. When barrier plate 2 sinks downward, when the soft soil consolidates to cause ground subsidence, hook plate 204 can provide upward resistance to effectively hook barrier plate 2 and prevent it from sinking with the soil body, thereby improving the stability and integrity of the foundation.

[0024] Embodiment two: as 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 comprises a connecting groove 601 formed in the barrier plate 2, the connecting groove 601 is communicated with the inner groove 203, the bottom of the cover plate 3 is provided with a connecting plate 602, the outer surface of the connecting plate 602 is provided with a convex strip 603, the lower side of the outer surface of the convex strip 603 is provided with a driving rack 604 which is in transmission cooperation with the driven gear 503, when the connecting plate 602 is inserted into the connecting groove 601, the driving rack 604 is in contact with the driven gear 503 and drives the driven gear 503 to rotate, so as to drive the screw rod 502 to rotate and push 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 inserted into the connecting groove 601, because the driving rack 604 is arranged at the lower side of the convex strip 603, the driving rack 604 can drive the plurality of driven gears 503 to rotate one by one in the process of descending, when the driven gears 503 rotate, the screw rod 502 is driven to rotate, because the inner wall of the inner groove 203 limits the hook plate 204, the hook plate 204 is driven to extend horizontally and outwardly.

[0030] Example four: as shown in Figure 1 and Figure 6 Comparative example three, another embodiment of the present application is that: the outer surface of the cover plate 3 is provided with an anchor rod 7 through a connecting seat 702, the end of the anchor rod 7 is provided with a second ground nail 701, through the arrangement of the anchor rod 7 and the second ground nail 701, the cover plate 3 is provided with a pulling force, forming a constraint system combining "blocking" and "pulling", which greatly limits 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 through long rod bolts, after the positioning frame 1 is installed, the sealing gasket is placed on the surface, then the top plate 205 is installed, the sealing gasket is placed on the surface, after the cover plate 3 is installed, the long rod bolts are sequentially threaded through the cover plate 3 and the top plate 205 and are screwed on the positioning frame 1, so as to form an integrated structure, because it is located above the ground and under the action of the sealing gasket, a water blocking ridge can be formed, which can effectively intercept and guide the surface runoff formed by ordinary rainfall, and prevent it from overflowing into the reinforced area from the horizontal direction.

[0032] Example five: as shown in Figure 3 and Figure 10As shown, the fourth comparative example, wherein another embodiment of the present application is: the end of the sealing plate 202 on one side of the barrier plate 2 is provided with a tapered portion 2021, the end of the sealing plate 202 on the other side of the barrier plate 2 is provided with a clamping groove 2022, the end of the inner wall of the clamping groove 2022 on both sides is provided with a second inclined surface portion 2023, when the tapered portion 2021 is inserted into the clamping groove 2022, the second inclined surface portion 2023 on both sides is in abutment with the tapered portion 2021, by the mutual limiting effect of the two sealing plates 202, not only can realize sealing, but also can connect the adjacent two barrier plates 2 together, the adjacent barrier plates 2 can play the role of mutual traction, avoid displacement in the direction of the reinforcing area alone, guarantee the overall sealing and barrier effect. And the tapered portion 2021 and the second inclined surface portion 2023 can reduce the resistance, facilitate the movement in the soil.

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

[0034] The above front, rear, left, right, top and bottom are based on the drawings in the specification Figure 1 As a standard, 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 the present application, it should be understood that the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application.

[0036] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A vacuum preloading ground treatment and protection structure for soft coastal soil, characterized by: It comprises a positioning frame (1), a blocking plate (2) and a cover plate (3); The bottom of the positioning frame (1) is provided with a plurality of first ground nails (102), and the positioning frame (1) is provided with a positioning slot (101), the blocking plate (2) is inserted into the positioning slot (101), the left and right sides of the blocking plate (2) are provided with side slots (201), the inside of the side slot (201) is provided with an enclosing plate (202), the bottom of the cover plate (3) and the enclosing plate (202) are provided with an extrusion mechanism (4), the extrusion mechanism (4) can drive the enclosing plate (202) to extend out of the outside of the blocking plate (2). The front and rear sides of the blocking plate (2) are provided with a plurality of inner grooves (203), the inner grooves (203) are internally provided with a hook plate (204) through an ejection mechanism (5), the bottom of the cover plate (3) is provided with a transmission mechanism (6), the transmission mechanism (6) and the cover plate (3) are in transmission cooperation and can drive the hook plate (204) to extend out of the outside of the blocking plate (2).

2. The reinforced structure for soft soil foundation treatment by vacuum preloading according to claim 1, wherein: The extrusion mechanism (4) comprises a first wedge plate (401) slidably installed in the inside of the side slot (201), and the enclosing plate (202) is installed on the first wedge plate (401), the bottom of the cover plate (3) is provided with a second wedge plate (402), and the second wedge plate (402) is in extrusion cooperation with the first wedge plate (401).

3. The reinforced structure for soft soil foundation treatment by vacuum preloading according to claim 1, wherein: The ejection mechanism (5) comprises a screw hole (501) formed in the inside of the hook plate (204), a screw rod (502) is rotatably installed in the inside of the inner groove (203), and the end of the screw rod (502) is threadedly installed in the screw hole (501), and the outer surface of the screw rod (502) is provided with a driven gear (503).

4. The reinforced structure for soft soil foundation treatment by vacuum preloading according to claim 3, wherein: The transmission mechanism (6) comprises a connecting groove (601) formed in the inside of the blocking plate (2), and the connecting groove (601) is in communication with the inner groove (203), the bottom of the cover plate (3) is provided with a connecting plate (602), the outer surface of the connecting plate (602) is provided with a convex strip (603), the lower side of the outer surface of the convex strip (603) is provided with a driving rack (604) in transmission cooperation with the driven gear (503).

5. The reinforced structure for soft soil foundation treatment by vacuum preloading according to claim 1, wherein: The outer surface of the cover plate (3) is provided with an anchor rod (7) through a connecting seat (702), and the end of the anchor rod (7) is provided with a second ground nail (701).

6. The reinforced structure for soft soil foundation treatment by vacuum preloading according to claim 1, wherein: The end of the enclosing plate (202) on one side of the blocking plate (2) is provided with a tapered portion (2021), the end of the enclosing plate (202) on the other side of the blocking plate (2) is provided with a clamping groove (2022), and the ends of the inner walls on both sides of the clamping groove (2022) are provided with second inclined surfaces (2023). When the tapered portion (2021) is inserted into the clamping groove (2022), the second inclined surfaces (2023) on both sides abut against the tapered portion (2021).

7. The reinforced structure for soft soil foundation treatment by vacuum preloading according to claim 2, wherein: The outer surface of the first wedge plate (401) is connected with a plurality of springs (403), and the ends of the springs (403) are connected with the inner walls of the side slots (201).

8. The reinforced structure for soft soil foundation treatment by vacuum preloading according to claim 1, wherein: 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 reinforced structure for soft soil foundation treatment by vacuum preloading according to claim 1, wherein: The bottom of the barrier plate (2) is provided with a first inclined surface part (2001), and the end of the hook plate (204) is provided with a third inclined surface part (2041).

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