Support pile protection structure for deep foundation pit construction in coastal silt zone

Abstract

The application relates to the technical field of deep foundation pit construction, in particular to a supporting pile protection structure for deep foundation pit construction in a coastal silt zone, which comprises a water stop curtain device, the top of the water stop curtain device is provided with a corbel device, and the surface of the water stop curtain device is provided with uniformly distributed first stabilizing devices; the raw pile and the cooked pile are connected together through positioning pieces, which can increase the connecting strength and compactness between the raw pile and the cooked pile, reduce the probability of the existence of gaps on the overall surface of the water stop curtain device, improve the overall strength of the water stop curtain device, and enable the supporting pile to be more stably limited in situ; meanwhile, the supporting pile is arranged between the two adjacent cooked piles, and the supporting pile and the raw pile are connected together through the positioning pieces, so that even if the force received by the supporting pile is parallel to the raw pile or the included angle between them is small, the raw pile can also pull the supporting pile through the positioning groove and the positioning piece.

Description

Technical Field

[0001] This invention relates to the field of deep foundation pit construction technology, and in particular to a support pile protection structure for deep foundation pit construction in coastal silt areas. Background Technology

[0002] Support piles are piles that primarily bear lateral thrust. They are commonly used for foundation pit support, slope protection, and landslide control, bearing horizontal earth pressure or landslide thrust. They generally require higher reinforcement than foundation piles that bear vertical forces. Due to the significant proportion of wind and water in coastal silt areas, deep foundation pit construction in these areas currently often employs a combination of support piles, water-stop curtain devices, and capping beams. The water-stop curtain device not only prevents groundwater from seeping into the foundation pit but also reduces the pressure on the support piles, making their operation more stable. Therefore, the water-stop curtain device is a common protective structure for support piles in deep foundation pit construction in coastal silt areas. Currently, the plain concrete piles and the reinforcing steel skeleton of the concrete piles are interlocked to form a water-stop curtain device. At the same time, the water-stop connectors and water-stop grooves are used to increase the sealing between the plain concrete piles and the reinforcing steel skeleton of the concrete piles. However, in the above structure, the plain concrete piles and the reinforcing steel skeleton of the concrete piles are formed by interlocking in the foundation pit. When the groundwater in the project is extremely abundant, the greater the depth of the foundation pit, the greater the water pressure that the water-stop curtain device will bear. The structure formed by simply drilling and pouring interlocking piles may become unstable due to water pressure.

[0003] Currently, a Chinese patent discloses a water-stop curtain device interlocking pile (publication number CN211257009U). This utility model fixes anchor rods on the side wall of the foundation pit, and the anchor rods pass through the protective plate and plain pile concrete inside the support pile to connect them into a whole, thereby strengthening the structure of the plain pile concrete and the steel reinforcement skeleton of the pile in the foundation pit and enhancing the overall strength of the water-stop curtain device interlocking pile body.

[0004] Because the aforementioned device connects the protective plate to the plain concrete pile via anchor bolts, seawater can impact the protective plate under tidal conditions or typhoons. This causes the protective plate to continuously rub and push the anchor bolts against the plain concrete pile. Since the plain concrete pile itself has low bearing capacity and holes are drilled in its surface, this not only reduces the strength of the plain concrete pile and the overall strength of the water-stop curtain device, thus reducing its limiting effect on the support piles, but also reduces the water-stopping effect of the entire water-stop curtain device, posing a safety hazard of leakage. Summary of the Invention

[0005] The purpose of this invention is to provide a support pile protection structure for deep foundation pit construction in coastal silt areas in order to solve the above-mentioned problems. This improves upon the existing support pile protection structure, which has low strength after construction, making it difficult to limit and support the support piles, and also has the problem of water leakage.

[0006] The present invention achieves the above-mentioned objective through the following technical solution: a support pile protection structure for deep foundation pit construction in coastal silt areas, comprising a water-stop curtain device, a crown beam device installed on the top of the water-stop curtain device, a uniformly distributed first stabilizing device installed on the surface of the water-stop curtain device, two adjacent first stabilizing devices being fixedly connected, and a uniformly distributed second stabilizing device installed on the surface of the water-stop curtain device, the second stabilizing device being located below the first stabilizing device.

[0007] Preferably, the water-stop curtain device includes uniformly distributed plain concrete piles and uniformly distributed reinforcing steel reinforcement cages. Each plain concrete pile has three positioning grooves on its surface. Positioning elements are inserted into the inner walls of the positioning grooves, with one end of each positioning element extending through the groove. The reinforcing steel reinforcement cage is positioned between two adjacent plain concrete piles. The other ends of two opposing positioning elements extend through the positioning grooves and connect to the adjacent reinforcing steel reinforcement cages. The surface of the reinforcing steel reinforcement cage is covered with plain concrete piles that are fixedly connected to the plain concrete piles. Connecting the plain and reinforcing piles together via positioning elements increases the connection strength and tightness between the plain and reinforcing piles. This not only reduces the probability of gaps on the overall surface of the water-stop curtain device, but also improves the overall strength of the water-stop curtain device. At this time, the support piles can be more stably fixed in place. The support piles are placed between two adjacent plain piles, and the support piles and plain piles are connected together by positioning components. Even if the force on the support pile is parallel to or the angle between it and the plain pile is small, the plain pile can still pull the support pile through the positioning groove and positioning component. This makes the operation of the support pile more stable. On the other hand, the gap between the plain pile and the plain pile is also blocked by the support pile, which can further improve the connection tightness between the support pile and the water-stop curtain device, thereby reducing the probability of water seepage in the water-stop curtain device. Preferably, the capping beam device includes a capping beam reinforcing steel skeleton, which is disposed above the plain pile concrete. The top of the plain pile reinforcing steel skeleton is fixedly connected to the capping beam reinforcing steel skeleton, and the surface of the capping beam reinforcing steel skeleton is covered with capping beam concrete. The tops of both the plain pile concrete and the plain pile concrete are in contact with the capping beam concrete. This further strengthens the connection between the support pile and the water-stop curtain device, and further improves the limiting protection effect on the support pile.

[0008] Preferably, the cross-sectional shapes of the positioning groove and the positioning element are both matching "earth" shapes, and the three positioning grooves are arranged in a T-shape on the surface of the plain pile concrete. This can increase the contact area and blocking area between the positioning element and the positioning groove, so that the support pile and the concrete pile can be connected more tightly with the plain pile.

[0009] Preferably, the plain pile concrete, the thick pile concrete, and the capping beam concrete are all C30 concrete material components, and the positioning component, the thick pile reinforcement cage, and the capping beam reinforcement cage are all HRB400 material components.

[0010] Preferably, the first stabilizing device includes uniformly distributed first bolts and stabilizing blocks. The first bolts are threaded onto the surface of the plain pile concrete, and a sleeve is rotatably connected to the surface of the first bolts. Two adjacent stabilizing blocks are disposed between two adjacent sleeves. One end of each stabilizing block contacts the adjacent plain pile concrete. Two first mounting components are fixedly connected to the top and bottom of each sleeve. Both ends of each stabilizing block are fixedly connected to a connecting mechanism rotatably connected to an adjacent first mounting component. The connecting mechanism includes a second mounting component fixedly connected to one end of the stabilizing block. The second mounting component is perpendicular to the first mounting component, and a sleeve is rotatably connected to the surface of the second mounting component. A first connecting sleeve rod is rotatably connected to a third mounting component, which is parallel to the first mounting component. The other end of the third mounting component is fixedly connected to a second connecting sleeve rod rotatably connected to the adjacent first mounting component. When a vibration force is transmitted to the surface of the plain pile concrete, the first stabilizing device can not only transmit the vibration force in the plain pile concrete to the adjacent inner pile concrete, effectively reducing the vibration amplitude and frequency of the plain pile concrete, but the inner pile concrete can also limit the plain pile concrete through the first stabilizing device, reducing the probability of the plain pile concrete cracking or being damaged away from the support pile, thereby improving the integrity of the entire water-stop curtain device.

[0011] Preferably, the first mounting component, the second mounting component, and the third mounting component have the same structure; wherein, the first mounting component includes a U-shaped seat, the U-shaped seat is fixedly connected to the surface of the sleeve frame, and threaded holes are provided at both ends of the U-shaped seat. A second bolt is threadedly connected to the inner wall of one of the threaded holes, and the other end of the second bolt passes through one of the threaded holes and the second connecting sleeve in sequence and is threadedly connected to the other threaded hole. This enables the first stabilizing device to meet the installation requirements of different positions, thereby expanding the practicality of the device.

[0012] Preferably, the water-stop curtain device further includes a uniformly distributed first steel plate, which is fixedly connected to the surface of the pile reinforcement skeleton and disposed inside the pile concrete. The other end of the first bolt passes through the pile concrete and is threadedly connected to the first steel plate. This allows the pile reinforcement skeleton to lock the first bolt together with the pile concrete through the first steel plate, making the first bolt run more stably.

[0013] Preferably, the cross-sectional shape of the end of the stabilizing block that contacts the plain pile concrete is arc-shaped, the thickness ratio of the stabilizing block to the frame is 2:1, and the other ends of the stabilizing block and the frame are both set on the same vertical plane, which can increase the contact area between the stabilizing block and the plain pile concrete.

[0014] Preferably, the second stabilizing device includes a support frame placed on the concrete surface of the retaining pile. The support frame has an L-shaped cross-section. A third bolt is inserted into the surface of the support frame, and the other end of the third bolt passes through the support frame and is threadedly connected to the concrete of the retaining pile. A ground anchor is inserted into the surface of the support frame, and the other end of the ground anchor extends to the outside of the support frame. The concrete base plate can tilt to support the retaining pile through the second stabilizing device, which reduces the probability of the retaining pile tilting away from the support pile, making the retaining pile operation more stable, improving the overall impact resistance of the water-stop curtain device, and further improving the limited protection effect on the support pile.

[0015] Preferably, the second stabilizing device further includes a support frame, and the support frame and the support frame together form a right triangle. The surface of the support frame is rotatably connected with two mounting sleeves, both of which are fixedly connected to the support frame. This allows the entire second stabilizing device to form a triangle, thereby improving the support effect of the concrete base plate on the pile.

[0016] Preferably, the water-stop curtain device further includes a uniformly distributed second steel plate, which is fixedly connected to the surface of the reinforcing steel skeleton of the pile, and is disposed inside the pile concrete. The second steel plate is disposed below the first steel plate, and the other end of the third bolt penetrates the pile concrete and is threadedly connected to the second steel plate. This can increase the strength of the connection between the third bolt and the pile concrete, making the second stabilizing device operate more stably.

[0017] The beneficial effects of this invention are: Connecting the plain piles and the auxiliary piles together with positioning components increases the connection strength and tightness between them. This not only reduces the probability of gaps on the overall surface of the water-stop curtain device but also improves the overall strength of the device. The support piles can then be more stably fixed in place. Furthermore, placing the support piles between two adjacent auxiliary piles and connecting them to the plain piles with positioning components allows the plain piles to pull the support piles even when the force on the support piles is parallel to or at a small angle to the plain piles. This makes the support piles more stable. On the other hand, the gaps between the plain piles and the auxiliary piles are also blocked by the support piles, further improving the connection tightness between the support piles and the water-stop curtain device, thus reducing the probability of water seepage from the water-stop curtain device. When a vibration force is transmitted to the surface of the plain concrete pile, the first stabilizing device can not only transmit the vibration force in the plain concrete pile to the adjacent concrete pile, effectively reducing the vibration amplitude and frequency of the plain concrete pile, but the concrete pile can also limit the plain concrete pile through the first stabilizing device, reducing the probability of the plain concrete pile cracking or being damaged away from the support pile, thereby improving the integrity of the entire water-stop curtain device. The concrete base slab can tilt to support the retaining piles through the second stabilizing device, which reduces the probability of the retaining piles tilting away from the support piles, making the retaining piles run more stably, improving the overall impact resistance of the water-stop curtain device, and further enhancing the protection effect on the support piles. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram showing the connection between the reinforcing steel cage of the pile and the reinforcing steel cage of the cap beam in this invention; Figure 3 This is a cross-sectional schematic diagram of the water-stopping curtain device and the first stabilizing device of the present invention. Figure 4 This is a schematic diagram of the structure of the first stabilizing device in this invention; Figure 5 This is an exploded view of the connecting mechanism in this invention; Figure 6 This is a partial structural diagram of the connecting mechanism and the first mounting component in this invention; Figure 7 This is a schematic diagram of the structure of the water curtain device and the second stabilizing device in this invention; Figure 8 This is a schematic diagram of the structure of the second stabilizing device in this invention; Figure 9 This is a schematic diagram of the plain pile after concrete pouring in this invention; Figure 10 This is a schematic diagram of the support piles before pouring in this invention; Figure 11 This is a schematic diagram of the concrete pouring process in this invention. Figure 12 This is a schematic diagram of the cap beam before concrete pouring in this invention.

[0019] In the diagram: 1. Water-stop curtain device; 11. Plain pile concrete; 12. Positioning groove; 13. Positioning component; 14. Reinforcing steel skeleton for solid pile; 15. Solid pile concrete; 16. First steel plate; 17. Second steel plate; 2. Crown beam device; 21. Crown beam reinforcing steel skeleton; 3. First stabilizing device; 31. First bolt; 32. Sleeve frame; 33. Stabilizing block; 34. First mounting assembly; 341. U-shaped seat; 342. Threaded hole; 343. Second bolt; 35. Connecting mechanism; 351. Second mounting assembly; 352. First connecting sleeve rod; 353. Third mounting assembly; 354. Second connecting sleeve rod; 4. Second stabilizing device; 41. Support frame; 42. Third bolt; 43. Ground anchor; 44. Support frame; 45. Mounting sleeve. Detailed Implementation

[0020] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] In practical implementation: such as Figure 1-12 As shown, a support pile protection structure for deep foundation pit construction in coastal silt areas includes a water-stop curtain device 1, a crown beam device 2 installed on the top of the water-stop curtain device 1, and a uniformly distributed first stabilizing device 3 installed on the surface of the water-stop curtain device 1. Two adjacent first stabilizing devices 3 are fixedly connected. A uniformly distributed second stabilizing device 4 is installed on the surface of the water-stop curtain device 1, and the second stabilizing device 4 is located below the first stabilizing device 3.

[0022] like Figure 2 , Figure 3 , Figure 7 , Figure 9 , Figure 10 , Figure 11 and Figure 12As shown, the water-stop curtain device 1 includes uniformly distributed plain concrete piles 11 and uniformly distributed reinforcing steel cages 14. Each plain concrete pile 11 has three positioning grooves 12 on its surface. Positioning elements 13 are inserted into the inner wall of each positioning groove 12, with the other end of each positioning element 13 extending through the outside of the positioning groove 12. The reinforcing steel cages 14 are positioned between two adjacent plain concrete piles 11. The other ends of the two opposing positioning elements 13 extend through the outside of the positioning groove 12 and connect to the adjacent reinforcing steel cages 14. The surface of the reinforcing steel cages 14 is provided with reinforcing concrete piles 15 that are fixedly connected to the plain concrete piles 11. (The plain piles and reinforcing steel piles are connected by the positioning elements 13.) Together, this increases the connection strength and tightness between the plain piles and the main piles, not only reducing the probability of gaps on the overall surface of the water-stop curtain device 1, but also improving the overall strength of the water-stop curtain device 1. At this time, the support piles can be more stably confined in place. Simultaneously, the support piles are placed between two adjacent main piles, and the support piles are connected to the plain piles via positioning elements 13. Even if the force on the support pile is parallel to or at a small angle to the plain pile, the plain pile can still pull the support pile through the positioning groove 12 and positioning elements 13. This makes the operation of the support piles more stable. On the other hand, the gaps between the plain piles and the main piles are also blocked by the support piles, which allows for... This further improves the connection tightness between the support piles and the water-stop curtain device 1, thereby reducing the probability of water seepage in the water-stop curtain device 1. The plain pile concrete 11, the thick pile concrete 15, and the capping beam concrete are all C30 concrete components, while the positioning component 13, the thick pile reinforcement cage 14, and the capping beam reinforcement cage 21 are all HRB400 material components. The capping beam device 2 includes a capping beam reinforcement cage 21, which is positioned above the plain pile concrete 11. The top of the thick pile reinforcement cage 14 is fixedly connected to the capping beam reinforcement cage 21, and the surface of the capping beam reinforcement cage 21 is covered with capping beam concrete. The tops of the plain pile concrete 11 and the thick pile concrete 15 are both connected to... The capping beam concrete contact {the capping beam steel reinforcement cage 21 can connect the support pile steel reinforcement cage and the plain pile steel reinforcement cage 14 together, and the capping beam concrete can connect the support pile concrete, plain pile concrete 11 and plain pile concrete 15 together, which further strengthens the connection between the support pile and the water-stop curtain device 1, and further improves the limited protection effect on the support pile}; the positioning groove 12 and the positioning element 13 are both matched "earth" shaped, and the three positioning grooves 12 are arranged in a T-shape on the surface of the plain pile concrete 11 {this can increase the contact area and blocking area between the positioning element 13 and the positioning groove 12, so that the support pile and the plain pile can be connected more tightly with the plain pile}.

[0023] like Figure 3-6As shown, the first stabilizing device 3 includes uniformly distributed first bolts 31 and stabilizing blocks 33. The first bolts 31 are threaded onto the surface of the plain concrete pile 15. A sleeve 32 is rotatably connected to the surface of the first bolts 31. Two adjacent stabilizing blocks 33 are disposed between two adjacent sleeves 32. One end of the stabilizing block 33 contacts the adjacent plain concrete pile 11. Two first mounting components 34 are fixedly connected to the top and bottom of the sleeve 32. Both ends of the stabilizing blocks 33 are fixedly connected to connecting mechanisms 35 that are rotatably connected to the adjacent first mounting components 34. The connecting mechanism 35 includes a second mounting component 351 fixedly connected to one end of the stabilizing block 33. The second mounting component 351 is perpendicular to the first mounting component 34. A first connecting sleeve 352 is rotatably connected to the surface of the second mounting component 351. A third mounting component 353 is rotatably connected to the surface of the first connecting sleeve 352. The third mounting component 353 is parallel to the first mounting component 34. The other end of the third mounting component 353 is fixedly connected to a second connecting sleeve 354 rotatably connected to the adjacent first mounting component 34. {When a vibration force is transmitted to the surface of the plain concrete pile 11, the first stabilizing device 3 can not only transmit the vibration force in the plain concrete pile 11 to the connected concrete pile 15, but also effectively reduce the vibration amplitude and vibration of the plain concrete pile 11.} The frequency of the concrete pile 15 can also limit the plain concrete pile 11 through the first stabilizing device 3, reducing the probability of the plain concrete pile 11 cracking or being damaged towards the line of defense away from the support pile, thereby improving the integrity of the entire water-stop curtain device 1; the first mounting component 34, the second mounting component 351 and the third mounting component 353 have the same structure; among them, the first mounting component 34 includes a U-shaped seat 341, the U-shaped seat 341 is fixedly connected to the surface of the sleeve frame 32, and threaded holes 342 are opened at both ends of the U-shaped seat 341. A second bolt 343 is threadedly connected to the inner wall of one of the threaded holes 342, and the other end of the second bolt 343 passes through one of the threads in sequence. A threaded hole 342 and a second connecting sleeve 354 are threaded together with another threaded hole 342. {When the worker needs to limit the plain concrete 11 at the corner, the worker only needs to rotate the first connecting sleeve 352 along the second bolt 343 in the second mounting assembly 351. The first connecting sleeve 352 can then rotate the sleeve 32 along with the first bolt 31 to the corresponding angle through the third mounting assembly 353, the second connecting sleeve 354 and the first mounting assembly 34, so that the stabilizing block 33 can effectively limit the plain concrete 11 at the corner. This enables the first stabilizing device 3 to meet the installation requirements of different positions, thereby expanding the practicality of the device.}The water-stop curtain device 1 also includes a uniformly distributed first steel plate 16, which is fixedly connected to the surface of the reinforcing steel skeleton 14 of the subgrade pile. The first steel plate 16 is disposed inside the subgrade concrete 15. The other end of the first bolt 31 passes through the subgrade concrete 15 and is threadedly connected to the first steel plate 16 {this allows the reinforcing steel skeleton 14 to lock the first bolt 31 together with the subgrade concrete 15 through the first steel plate 16, making the operation of the first bolt 31 more stable}. The cross-sectional shape of the end of the stabilizing block 33 that contacts the subgrade concrete 11 is arc-shaped. The thickness ratio of the stabilizing block 33 to the sleeve 32 is 2:1. The other ends of the stabilizing block 33 and the sleeve 32 are both disposed on the same vertical plane {this increases the contact area between the stabilizing block 33 and the subgrade concrete 11; workers When the first stabilizing device 3 is needed, the operator first unscrews the second bolt 343 in the first mounting assembly 34, then inserts the second connecting sleeve 354 in the connecting mechanism 35 into the inside of the U-shaped seat 341. The operator then screws the second bolt 343 back into the threaded hole 342, ensuring that the second bolt 343 passes through the threaded hole 342, the second connecting sleeve 354, and another threaded hole 342 in sequence, until it abuts against the surface of the U-shaped seat 341. Once the operator has connected the connecting mechanisms 35 on both sides of the stabilizing block 33 to the adjacent first mounting assembly 34, the operator can then firmly secure the stabilizing block 33 to the surface of the plain concrete pile 11 using the first bolt 31 in conjunction with the first mounting assembly 34 and the connecting mechanism 35.

[0024] like Figure 7 and Figure 8As shown, the second stabilizing device 4 includes a support frame 41 placed on the surface of the concrete pile 15. The support frame 41 has an L-shaped cross-section. A third bolt 42 is inserted into the surface of the support frame 41, and the other end of the third bolt 42 passes through the support frame 41 and is threadedly connected to the concrete pile 15. A ground anchor 43 is inserted into the surface of the support frame 41, and the other end of the ground anchor 43 extends to the outside of the support frame 41. {The concrete base plate can tilt to support the pile through the second stabilizing device 4, which reduces the probability of the pile tilting away from the support pile, making the pile operation more stable, improving the overall impact resistance of the water-stop curtain device 1, and further improving the limited protection effect on the support pile}. The second stabilizing device 4 also includes a support frame 44, and the support frame 41 and the support frame 44 together form a single unit. The support frame 44 is rotatably connected to two mounting sleeves 45, both of which are fixedly connected to the support frame 41, forming a right-angled triangle. This allows the entire second stabilizing device 4 to form a triangle, thereby improving the support effect of the concrete base plate on the pile. The water-stop curtain device 1 also includes a uniformly distributed second steel plate 17, which is fixedly connected to the surface of the pile reinforcement skeleton 14. The second steel plate 17 is located inside the pile concrete 15 and below the first steel plate 16. The other end of the third bolt 42 penetrates the pile concrete 15 and is threadedly connected to the second steel plate 17. This increases the strength of the connection between the third bolt 42 and the pile concrete 15, making the second stabilizing device 4 operate more stably. like Figure 9-12 As shown in the figure, the rectangle represents earthwork. The top of the earthwork has evenly distributed plain pile holes. Between two adjacent plain pile holes, there are overlapping auxiliary pile holes. On the side of the plain pile hole perpendicular to the auxiliary pile hole, there are overlapping auxiliary pile holes. Before the workers pour the plain pile concrete 11, they need to use a customized plain pile mold. The plain pile mold and the plain pile concrete 11 together form a complete cylinder. The inner side of the plain pile mold has protrusions of the same shape and size as the positioning piece 13. A plain pile refers to a pile without reinforcing steel bars, consisting purely of concrete. An auxiliary pile refers to a reinforced concrete pile with added reinforcing steel bars.

[0025] The usage process of this invention is as follows: First, the workers open holes for plain piles at the designated ground location. Then, they place the plain pile mold that matches the plain pile concrete 11 into the hole. The workers then pour the plain pile concrete 11 into the mold using a jet grouting process until the plain pile concrete 11 reaches the specified strength. After that, the workers remove the plain pile mold. Second: The staff opens a support pile hole at the designated location that coincides with the hole of the plain pile. Then, the staff puts the support pile steel reinforcement cage with positioning piece 13 into the support pile hole and inserts the positioning piece 13 into the positioning groove 12 on the surface of the plain pile concrete 11. Then, the staff pours the support pile concrete into the support pile hole through the jet grouting process, so that the support pile concrete covers the support pile steel reinforcement cage and fills the gap between the positioning piece 13 and the adjacent positioning groove 12. 3. After the concrete of the support pile reaches the specified strength, the workers open a hole for the sub-pile that overlaps with the sub-pile hole between two adjacent sub-pile holes. Then, the workers put the sub-pile steel reinforcement skeleton 14 with positioning piece 13 into the sub-pile hole and insert the positioning piece 13 into the adjacent positioning groove 12. Then, the workers pour the sub-pile concrete 15 into the sub-pile hole through the jet grouting process, and make the sub-pile concrete 15 wrap the sub-pile steel reinforcement skeleton 14 and fill the gap between the positioning piece 13 and the adjacent positioning groove 12. 4. After the plain pile concrete 15 reaches the specified strength, the workers place the cap beam steel reinforcement cage 21 on top of the plain pile concrete 11, and then fix the support pile steel reinforcement cage and the plain pile steel reinforcement cage 14 to the cap beam steel reinforcement cage 21 by welding. Then, the workers install the cap beam formwork at the designated position near the cap beam steel reinforcement cage 21, and then pour the cap beam concrete into the inside of the cap beam formwork, so that the cap beam concrete wraps around the cap beam steel reinforcement cage 21. 5. After the capping beam concrete reaches the specified strength, the workers will excavate the soil around the support piles and the water-stop curtain device 1. When the soil on the side away from the support piles of the water-stop curtain device 1 is excavated to the specified depth, the workers will open a threaded groove on the surface of the plain pile concrete 15 at a specified height and extend the threaded groove into the interior of the first steel plate 16. Then, the workers will insert the first bolt 31 through the sleeve 32 and thread it into the threaded groove. As the first bolt 31 moves the sleeve 32 closer to the plain pile concrete 15, the sleeve 32 will move the stabilizing block 33 closer to the plain pile concrete 11 through the first installation component 34 and the connecting mechanism 35 until the stabilizing block 33 is tightly attached to the plain pile concrete 11. Six: Then the workers continue to excavate the soil on the side away from the support pile of the water-stop curtain device 1. When the soil on the side away from the support pile of the water-stop curtain device 1 reaches another specified depth, the workers pour concrete at the bottom of the foundation pit to form a concrete base slab. Then the workers open evenly distributed threaded grooves on the surface of the concrete pile 15 at another specified height and extend the threaded grooves into the interior of the second steel plate 17. Then the workers attach the support frame 41 tightly to both the concrete base slab and the concrete pile 15. Then the workers insert the third bolt 42 through the support frame 41 and thread it into the threaded groove. Then the workers insert the ground anchor 43 through the support frame 41 and extend it into the interior of the concrete base slab.

[0026] When external wind, waves, or earthwork push against the support piles, the adjacent two solid piles and plain piles work together to block the support piles. At this time, the support piles can be more stably confined to their original positions. Even if the force on the support piles is parallel to or at a small angle to the plain piles, the plain piles can still pull the support piles through the positioning grooves 12 and positioning parts 13. This makes the operation of the support piles more stable, and there are no gaps between the plain piles and solid piles. At the same time, the gaps between the plain piles and solid piles are also covered by the support piles. This can improve the tightness of the connection between the support piles and the water-stop curtain device 1, thereby reducing the probability of water leakage from the water-stop curtain device 1.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A protective structure for deep foundation pit construction in coastal silt areas, comprising a water-stop curtain device (1), characterized in that: The top of the water-stop curtain device (1) is equipped with a crown beam device (2), and the surface of the water-stop curtain device (1) is equipped with uniformly distributed first stabilizing devices (3). Two adjacent first stabilizing devices (3) are fixedly connected. The surface of the water-stop curtain device (1) is equipped with uniformly distributed second stabilizing devices (4), and the second stabilizing devices (4) are located below the first stabilizing devices (3). The water-stop curtain device (1) includes uniformly distributed plain concrete piles (11) and uniformly distributed reinforcing steel cages (14). The surface of each plain concrete pile (11) is provided with three positioning grooves (12). Positioning members (13) are inserted into the inner wall of each positioning groove (12). The other end of each positioning member (13) extends through to the outside of the positioning groove (12). The reinforcing steel cages (14) are arranged between two adjacent plain concrete piles (11). The other ends of each of the two positioning members (13) extend through to the outside of the positioning groove (12) and are connected to the adjacent reinforcing steel cages (14). The surface of the reinforcing steel cages (14) is provided with plain concrete piles (15) that are fixedly connected to the plain concrete piles (11). The capping beam device (2) includes a capping beam steel reinforcement skeleton (21), which is located above the plain pile concrete (11). The top of the pile steel reinforcement skeleton (14) is fixedly connected to the capping beam steel reinforcement skeleton (21). The surface of the capping beam steel reinforcement skeleton (21) is provided with capping beam concrete. The tops of the plain pile concrete (11) and the pile concrete (15) are in contact with the capping beam concrete. The first stabilizing device (3) includes uniformly distributed first bolts (31) and stabilizing blocks (33). The first bolts (31) are threaded onto the surface of the plain concrete pile (15). A sleeve (32) is rotatably connected to the surface of the first bolts (31). Two adjacent stabilizing blocks (33) are disposed between two adjacent sleeves (32). One end of the stabilizing block (33) is in contact with the adjacent plain concrete pile (11). Two first mounting components (34) are fixedly connected to the top and bottom of the sleeves (32). Both ends of the stabilizing blocks (33) are fixedly connected to the adjacent first mounting components (34). A connecting mechanism (35); wherein the connecting mechanism (35) includes a second mounting component (351) fixedly connected to one end of a stabilizing block (33), the second mounting component (351) being perpendicular to a first mounting component (34), a first connecting sleeve rod (352) being rotatably connected to the surface of the second mounting component (351), a third mounting component (353) being rotatably connected to the surface of the first connecting sleeve rod (352), the third mounting component (353) being parallel to the first mounting component (34), and a second connecting sleeve rod (354) being fixedly connected to the other end of the third mounting component (353) and rotatably connected to the adjacent first mounting component (34); The second stabilizing device (4) includes a support frame (41) placed on the surface of the concrete pile (15). The support frame (41) has an L-shaped cross-section. A third bolt (42) is inserted into the surface of the support frame (41). The other end of the third bolt (42) passes through the support frame (41) and is threadedly connected to the concrete pile (15). A ground anchor (43) is inserted into the surface of the support frame (41). The other end of the ground anchor (43) extends to the outside of the support frame (41).

2. The support pile protection structure for deep foundation pit construction in coastal silt areas according to claim 1, characterized in that: The cross-sectional shapes of the positioning groove (12) and the positioning element (13) are both matching "earth" shapes, and the three positioning grooves (12) are arranged in a T-shape on the surface of the plain pile concrete (11).

3. The support pile protection structure for deep foundation pit construction in coastal silt areas according to claim 1, characterized in that: The plain pile concrete (11), the solid pile concrete (15) and the cap beam concrete are all C30 concrete material components, and the positioning component (13), the solid pile reinforcement cage (14) and the cap beam reinforcement cage (21) are all HRB400 material components.

4. The support pile protection structure for deep foundation pit construction in coastal silt areas according to claim 1, characterized in that: The first mounting component (34), the second mounting component (351), and the third mounting component (353) have the same structure; wherein, the first mounting component (34) includes a U-shaped seat (341), the U-shaped seat (341) is fixedly connected to the surface of the sleeve frame (32), and threaded holes (342) are provided at both ends of the U-shaped seat (341). A second bolt (343) is threadedly connected to the inner wall of one of the threaded holes (342), and the other end of the second bolt (343) passes through one of the threaded holes (342) and the second connecting sleeve (354) in sequence and is threadedly connected to the other threaded hole (342).

5. The support pile protection structure for deep foundation pit construction in coastal silt areas according to claim 4, characterized in that: The water-stop curtain device (1) also includes a uniformly distributed first steel plate (16), which is fixedly connected to the surface of the reinforcing steel skeleton (14) of the pile, and is located inside the pile concrete (15). The other end of the first bolt (31) passes through the pile concrete (15) and is threadedly connected to the first steel plate (16).

6. The protective structure for deep foundation pit construction in coastal silt areas according to claim 4, characterized in that: The cross-sectional shape of the end of the stabilizing block (33) that contacts the plain concrete pile (11) is arc-shaped. The thickness ratio of the stabilizing block (33) to the frame (32) is two to one. The other ends of the stabilizing block (33) and the frame (32) are both set on the same vertical plane.

7. The support pile protection structure for deep foundation pit construction in coastal silt areas according to claim 1, characterized in that: The second stabilizing device (4) also includes a support frame (44). The support frame (41) and the support frame (44) together form a right triangle. The surface of the support frame (44) is rotatably connected with two mounting sleeves (45) that are fixedly connected to the support frame (41).

8. The support pile protection structure for deep foundation pit construction in coastal silt areas according to claim 1, characterized in that: The water-stop curtain device (1) further includes a uniformly distributed second steel plate (17), which is fixedly connected to the surface of the pile reinforcement skeleton (14). The second steel plate (17) is located inside the pile concrete (15) and below the first steel plate (16). The other end of the third bolt (42) penetrates the pile concrete (15) and is threadedly connected to the second steel plate (17).

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