Foundation pit vibration reduction barrier and construction method

Abstract

The application relates to the technical field of damping barriers, and provides a foundation pit damping barrier and a construction method. The foundation pit damping barrier comprises a main body layer, a water stop layer and a post-poured layer, the main body layer is arranged between the water stop layer and the post-poured layer, the main body layer comprises multiple rows of supporting piles, the number of supporting piles in each row is arranged at intervals, and the two adjacent rows of supporting piles are arranged in a staggered mode; an isolation layer is arranged between every two adjacent supporting piles, and the multiple isolation layers separate the space between the two adjacent rows of supporting piles to form multiple isolation areas. The foundation pit damping barrier can improve the damping effect and the supporting capacity for the foundation pit.

Description

Technical Field

[0001] This application relates to the technical field of vibration reduction barriers, and in particular to a vibration reduction barrier for foundation pits and its construction method. Background Technology

[0002] A vibration damping barrier is a structure or device used to reduce or isolate the transmission of vibrations. It is typically installed between the vibration source and the object to be protected, reducing the impact of vibrations by absorbing, reflecting, or blocking vibration energy. Commonly found in construction, transportation, and other fields, an appropriate vibration damping barrier structure can effectively reduce the adverse effects of vibrations.

[0003] Traditional vibration reduction barriers consist of support piles and an isolation layer. Multiple support piles are spaced apart, and the isolation layer is installed between two adjacent support piles to form an isolation structure together with the support piles. A water-stopping layer is laid on the inner side of the isolation structure to ensure the overall water-stopping and vibration reduction effect.

[0004] While such vibration-damping barriers can achieve a certain vibration reduction effect in practical applications, their vibration reduction effect is not ideal when facing situations with frequent vibrations, such as foundation pits involved in rail transit. They fail to achieve the expected vibration reduction effect and have poor overall support capacity for foundation pits, posing certain safety hazards. Therefore, further improvements are needed. Summary of the Invention

[0005] To improve the vibration reduction effect and the support capacity of the foundation pit, this application provides a foundation pit vibration reduction barrier and a construction method.

[0006] Firstly, the foundation pit vibration damping barrier provided in this application adopts the following technical solution:

[0007] A foundation pit vibration damping barrier includes a main layer, a water-stop layer, and a post-cast layer. The main layer is disposed between the water-stop layer and the post-cast layer. The main layer includes multiple rows of support piles, with each row having a number of piles spaced apart and adjacent rows staggered. An isolation layer is provided between each pair of adjacent support piles, and these multiple isolation layers divide the space between adjacent rows of support piles into multiple isolation zones. Each isolation layer has an mounting plate on its surface near the isolation zone, and the surface of the mounting plate near the isolation layer has a vibration damping layer. Adjacent piles within the isolation zone... A locking plate connects the two mounting plates; the mounting plate has an embedding groove on its surface near the isolation layer, and a sliding plate is slidably installed in the embedding groove. The vibration damping layer is disposed on the surface of the sliding plate; a driving assembly for driving the sliding plate to press against the isolation layer is provided in the isolation area; the driving assembly includes a support rod and a sliding rod, the support rod is inserted into the isolation area, one end of the sliding rod is connected to the sliding plate, and the other end passes through the isolation area; the outer wall of the support rod has a guide surface, and when the support rod is inserted downward, the support rod pushes the sliding rod through the guide surface, and forces the sliding plate to press against the isolation layer.

[0008] By adopting the above technical solution, and by setting up multiple rows of support piles, with adjacent rows of support piles arranged in a staggered manner and adjacent support piles connected in series through isolation layers, the structural strength of the main layer is greatly improved, enhancing the overall support capacity for the foundation pit. Multiple isolation layers separate the space between adjacent rows of support piles, forming isolation zones. In situations with frequent vibrations, such as foundation pits involved in rail transit, vibration waves enter the isolation zone after passing through the support piles or isolation layers. The vibration is weakened by the dual effects of "abrupt propagation medium change" and "energy dissipation." That is, the vibration wave needs to cross a "solid-air-solid" medium cross-section, and the efficiency of vibration transmission in the air within the isolation zone is much lower than that in the solid, thus significantly reducing the vibration transmission intensity and improving the vibration reduction effect. By setting up mounting plates with vibration-damping layers on the inner side of the isolation layers, since the isolation zone is formed by multiple isolation layers, each isolation layer in the isolation zone has a vibration-damping layer on its inner side. If vibration waves need to penetrate the isolation zone, they must penetrate multiple vibration-damping layers, further weakening the vibration waves and greatly improving the vibration reduction effect. By driving the components to force the sliding plate against the isolation layer, the isolation layer is supported, further improving its structural strength and thus enhancing the overall structure's support performance for the foundation pit. Inserting the support rod into the isolation zone causes it to push the sliding rod through a guide surface, forcing the sliding plate against the isolation layer and improving the overall structure's ease of operation.

[0009] Optionally, the support pile has a steel cage embedded in it, and the isolation layer has steel bars embedded in it. The two ends of the steel bars are inserted into two adjacent support piles and connected to the steel cage of the support pile.

[0010] By adopting the above technical solution, the two ends of the steel bar are connected to the steel cages in the two adjacent support piles, so that the support piles and the isolation layer form an integral whole, thereby improving the overall structural strength of the main layer.

[0011] Optionally, the guide surface includes a vertical section and an inclined section. The inclined section is located at the bottom of the vertical section and gradually approaches the support rod from top to bottom. When the end of the sliding rod away from the sliding plate abuts against the vertical section, the sliding plate presses against the isolation layer.

[0012] By adopting the above technical solution, when the support rod is inserted into the isolation zone, the sliding rod slides towards the side closer to the isolation layer under the guidance of the inclined section. When the sliding rod moves to the vertical section, it forces the sliding plate to press against the isolation layer. Utilizing the vertical relationship between the vertical section and the sliding rod, the sliding plate remains pressed against the isolation layer, improving the stability of the overall structure.

[0013] Optionally, the outer wall of the support rod is provided with a guide plate, and the outer wall of the guide plate forms the guide surface; guide plates are connected to both sides of the guide plate, and the two guide plates are used to guide the sliding rod into the guide surface and restrict the rotation of the support rod.

[0014] By employing the above technical solution, two guide plates guide the sliding rod, ensuring smooth engagement of the guide surface with the sliding rod when the support rod is inserted into the isolation zone. Simultaneously, the two guide plates provide a steering limit for the support rod, forcing it to remain in contact with the guide surface. This reduces the likelihood of the support rod rotating freely and causing the sliding rod to detach from the guide surface, thus improving the overall structural stability.

[0015] Optionally, the sliding rod includes a first sliding part and a second sliding part. One end of the first sliding part is connected to the sliding plate, and the other end passes through the isolation area. The second sliding part is slidably installed on the side of the mounting plate away from the isolation layer to abut against the guide surface. A sealing plate for pushing the first sliding part is provided at the end of the second sliding part near the first sliding part. A sealing ring is embedded in the surface of the sealing plate. When the sliding plate abuts against the isolation layer, the sealing plate abuts against the surface of the mounting plate, and a negative pressure is formed in the embedded groove.

[0016] By adopting the above technical solution, when the support rod is inserted into the isolation zone, the support rod pushes the second sliding part through the guide surface, forcing the second sliding part to slide towards the isolation layer. This causes the second sliding part to push the first sliding part into the mounting plate through the sealing plate. At this time, the sealing plate abuts against the mounting plate, preventing air from entering the embedding groove from the isolation zone. Because the sliding plate slides towards the side closer to the isolation layer under the push of the first sliding part, pressing firmly against the isolation layer, a certain negative pressure is formed in the embedding groove. Vibration waves rely on the collision and transmission of medium molecules. The air molecule density in the negative pressure space is lower than that at normal pressure, and the collision frequency between molecules is significantly reduced, thereby increasing the difficulty of vibration wave propagation and improving the overall vibration reduction effect of the structure.

[0017] Optionally, the side wall of the mounting plate is connected to a connecting post, and the locking plate has a connecting groove. The connecting post passes through the connecting groove and is connected to a locking nut. Each locking plate is connected to a limiting plate. The limiting plates of multiple locking plates in the isolation area surround each other to form a limiting channel for the support rod to pass through. A positioning sleeve for the support rod to be inserted is pre-embedded at the bottom of the isolation area.

[0018] By adopting the above technical solution, the insertion path of the support rod is determined by using the limiting channel formed by multiple limiting plates and the positioning sleeve in the isolation area, so that the support rod is kept in the center position of the isolation area, reducing the possibility of deviation during the insertion of the support rod and improving the installation accuracy of the overall structure.

[0019] Secondly, the construction method for a vibration reduction barrier provided in this application adopts the following technical solution:

[0020] A construction method for a vibration damping barrier includes the following steps: S1, fabrication of the main layer; S2, fabrication of the waterstop layer; S3, fabrication of the post-cast layer.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. By setting up multiple rows of support piles, with adjacent rows staggered and connected in series by isolation layers, the structural strength of the main layer is greatly improved, enhancing the overall support capacity for the foundation pit. Multiple isolation layers separate the space between adjacent rows of support piles, forming isolation zones. In situations with frequent vibrations, such as foundation pits involved in rail transit, vibration waves pass through the support piles or isolation layers and enter the isolation zone. The vibration is weakened by the dual effects of "abrupt propagation medium change" and "energy dissipation." That is, the vibration wave needs to cross a "solid-air-solid" medium cross-section, and the efficiency of vibration transmission in the air within the isolation zone is much lower than that in the solid, thus significantly reducing the intensity of vibration transmission and improving the vibration reduction effect.

[0023] 2. By installing the mounting plate and damping layer, the sliding plate is forced to press against the isolation layer, thus providing support for the isolation layer and further improving its structural strength. This, in turn, enhances the overall structure's support performance for the foundation pit. Since the isolation zone is formed by multiple isolation layers, each isolation layer has a damping layer on its inner side. If a vibration wave is to penetrate the isolation zone, it must penetrate multiple damping layers. These damping layers further weaken the vibration wave, significantly improving the damping effect.

[0024] 3. With the first and second sliding parts, when the support rod is inserted into the isolation zone, the support rod pushes the second sliding part through the guide surface, forcing the second sliding part to slide towards the isolation layer. This causes the second sliding part to push the first sliding part into the mounting plate through the sealing plate. At this time, the sealing plate abuts against the mounting plate, preventing air from entering the embedding groove from the isolation zone. Because the sliding plate slides towards the isolation layer under the push of the first sliding part, pressing firmly against the isolation layer, a certain negative pressure is formed in the embedding groove. Vibration waves rely on the collision of medium molecules for transmission. The air molecule density in the negative pressure space is lower than at normal pressure, and the collision frequency between molecules is significantly reduced, thus increasing the difficulty of vibration wave propagation and improving the overall vibration reduction effect of the structure. Attached Figure Description

[0025] Figure 1 This is a cross-sectional view of the overall structure of Embodiment 1;

[0026] Figure 2 This is a schematic diagram illustrating the structure of the mounting plate in Example 2;

[0027] Figure 3 This is a partial cross-sectional view of the vibration damping layer in Example 2;

[0028] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0029] Figure 5This is a partial cross-sectional view of the guide surface in Embodiment 2;

[0030] Figure 6 This is a partial cross-sectional view of the sealing plate in Example 3.

[0031] Explanation of reference numerals in the attached drawings: 1. Main layer; 11. Support pile; 12. Isolation layer; 13. Isolation zone; 131. Positioning sleeve; 2. Water-stop layer; 3. Post-cast layer; 4. Mounting plate; 41. Vibration damping layer; 42. Locking plate; 421. Limiting plate; 422. Limiting channel; 423. Connecting strip; 43. Embedding groove; 44. Sliding plate; 45. Connecting column; 46. Locking nut; 47. Sliding groove; 48. Mounting sleeve; 5. Drive assembly; 51. Support rod; 511. Guide surface; 512. Vertical section; 513. Inclined section; 514. Guide plate; 515. Guide piece; 52. Sliding rod; 521. First sliding part; 522. Second sliding part; 523. Sealing plate; 524. Sealing ring. Detailed Implementation

[0032] The following combination Figures 1-6 This application will be described in further detail.

[0033] Example 1:

[0034] This application discloses a foundation pit vibration reduction barrier.

[0035] Reference Figure 1 A foundation pit vibration reduction barrier includes a main layer 1, a water-stop layer 2, and a post-cast layer 3. Both the water-stop layer 2 and the post-cast layer 3 are concrete structures, and the main layer 1 is located between the water-stop layer 2 and the post-cast layer 3. In this embodiment, the main layer 1 includes two rows of support piles 11. Multiple support piles 11 are spaced apart in both rows, and the two rows of support piles 11 are staggered. The support piles 11 are vertically arranged, and the lower end of each support pile 11 is inserted into the soil layer of the foundation pit.

[0036] An isolation layer 12 is fixedly installed between each pair of adjacent support piles 11. Both the support piles 11 and the isolation layer 12 are concrete structures. The support piles 11 have embedded steel cages (not shown in the figure), and the isolation layer 12 has embedded steel bars (not shown in the figure). The two ends of the steel bars are inserted into the two adjacent support piles 11 respectively and welded to the steel cages of the support piles 11 to make all the support piles 11 and all the isolation layers 12 connected as a whole.

[0037] Multiple isolation layers 12 divide the space between the two rows of support piles 11 to form multiple isolation zones 13. It should be noted that in this embodiment, each isolation zone 13 is formed by three adjacent support piles 11 and three adjacent isolation layers 12, and the three support piles 11 in the isolation zone 13 are arranged in a triangular pattern.

[0038] In addition, after the main layer 1 is poured, a cover plate (not shown in the figure) is laid on top of the main layer 1. The cover plate can be connected to the main layer 1 by expansion bolts. The cover plate is used to cover the upper openings of all isolation zones 13. Then, concrete is poured on top of the cover plate. After the concrete solidifies, the upper openings of all isolation zones 13 are sealed, and finally a closed isolation zone 13 is formed.

[0039] The implementation principle of Embodiment 1 of this application is as follows: by setting two rows of support piles 11, the two rows of support piles 11 are staggered and adjacent two support piles 11 are connected in series through the isolation layer 12, which greatly improves the structural strength of the main layer 1 and improves the overall support capacity of the foundation pit.

[0040] Multiple isolation layers 12 divide the space between the two rows of support piles 11 to form multiple isolation zones 13. When facing situations with frequent vibrations, such as foundation pits involved in rail transit, the vibration wave enters the isolation zone 13 after passing through the support piles 11 or isolation layers 12. The vibration is weakened by the dual effects of "abrupt change in propagation medium" and "energy dissipation". The vibration wave needs to cross the medium cross section of "solid-air-solid". The efficiency of air in the isolation zone 13 for transmitting vibration is much lower than that of solid. Moreover, the vibration wave is reflected and lost on the inner wall of the isolation zone 13, thereby greatly reducing the intensity of vibration transmission and improving the vibration reduction effect.

[0041] Example 2:

[0042] This application discloses a foundation pit vibration reduction barrier.

[0043] The difference between the foundation pit vibration reduction barrier disclosed in this application and Embodiment 1 is that:

[0044] Reference Figure 2 , Figure 3 In this embodiment, each isolation zone 13 is equipped with multiple mounting plates 4. The number of mounting plates 4 in the isolation zone 13 corresponds to the number of isolation layers 12 in the isolation zone 13. That is, there are three mounting plates 4 in each isolation zone 13, and each mounting plate 4 is attached to the surface of the corresponding isolation layer 12.

[0045] Within the isolation zone 13, a locking plate 42 is connected between two adjacent mounting plates 4. A connecting post 45 is fixedly installed on the side wall of the mounting plate 4. The locking plate 42 has a connecting groove (not shown in the figure). The inner diameter of the connecting groove is larger than the outer diameter of the connecting post 45. The locking plate 42 has two connecting grooves. The two connecting grooves are used for the connecting posts 45 of two adjacent mounting plates 4 to pass through. After the connecting post 45 of the mounting plate 4 passes through the corresponding connecting groove of the locking plate 42, a locking nut 46 is connected. The locking nut 46 is sleeved on the connecting post 45 and threadedly connected to the connecting seat.

[0046] Additionally, it should be noted that the upper and lower sides of two adjacent mounting plates 4 are connected by locking pieces 42, meaning that the lower side of the mounting plate 4 also has a connecting post 45 (not shown in the figure), in order to improve the connection reliability between the three mounting plates 4 in the isolation zone 13.

[0047] Reference Figure 3 , Figure 4 The mounting plate 4 has an embedding groove 43 on its surface near the isolation layer 12. A sliding plate 44 is slidably installed in the embedding groove 43. A vibration damping layer 41 is fixedly installed on the surface of the sliding plate 44 near the isolation layer 12. The vibration damping layer 41 can be made of foam.

[0048] An isolation zone 13 is equipped with a drive assembly 5 for driving the sliding plate 44 to press against the isolation layer 12. The drive assembly 5 includes a support rod 51 and a sliding rod 52. The support rod 51 is vertically arranged and inserted into the isolation zone 13, with the support rod 51 located at the center of the isolation zone 13. A positioning sleeve 131 for inserting the support rod 51 is pre-embedded in the bottom of the isolation zone 13 (i.e., the soil layer of the foundation pit). Each locking plate 42 is connected to a connecting strip 423. One end of the connecting strip 423 is fixedly connected to the locking plate 42, and the other end is fixedly connected to a limiting plate 421. The limiting plate 421 is arc-shaped. The limiting plates 421 of multiple locking plates 42 in the isolation zone 13 surround each other to form a limiting channel 422. The support rod 51 passes through the limiting channel 422 and the positioning sleeve 131 from top to bottom and is inserted into the soil layer of the foundation pit.

[0049] In actual construction, the support rod 51 can be driven by a pile driving machine. The lower end of the support rod 51 can be set as a pointed tip to facilitate the support rod 51 penetrating deep into the soil layer.

[0050] Reference Figure 4 , Figure 5 In this embodiment, one end of the sliding rod 52 is fixedly connected to the sliding plate 44, and the other end passes through the isolation zone 13. The surface of the mounting plate 4 is provided with a sliding groove 47 for the sliding rod 52 to pass through. A guide plate 514 is fixedly installed on the outer wall of the support rod 51, and the outer wall of the guide plate 514 forms a guide surface 511. When the support rod 51 is inserted downward, the support rod 51 pushes the sliding rod 52 through the guide surface 511 and forces the sliding plate 44 to press against the isolation layer 12.

[0051] Guide plates 515 are fixedly installed on both sides of the guide plate 514. The two guide plates 515 are used to guide the sliding rod 52 into the guide surface 511 and restrict the rotation of the support rod 51. The guide surface 511 includes a vertical section 512 and an inclined section 513. The inclined section 513 is located at the bottom of the vertical section 512. The inclined section 513 gradually approaches the support rod 51 from top to bottom. When the end of the sliding rod 52 away from the sliding plate 44 abuts against the vertical section 512, the sliding plate 44 abuts against the isolation layer 12.

[0052] In addition, it should be noted that, in order to improve the support effect on the isolation layer 12, the sliding rods 52 of the sliding plate 44 can be arranged in multiple intervals along the height direction, that is, the guide plate 514 is also adapted to be arranged in multiple intervals along the length direction of the support rod 51, so as to improve the support effect of the support rod 51 on the sliding plate 44, and thus improve the support effect on the isolation layer 12.

[0053] The implementation principle of Embodiment 2 of this application is as follows: After arranging multiple mounting plates 4 in the isolation zone 13, the support rods 51 are inserted into the isolation zone 13 from top to bottom, so that the support rods 51 pass through the limiting channel 422 and the positioning sleeve 131 in sequence and are inserted into the soil layer of the foundation pit. During this process, the channel guide surface 511 of the support rod 51 pushes the sliding rod 52, thereby causing the sliding plate 44 to slide towards the side closer to the isolation layer 12, so as to press against the isolation layer 12, thereby providing a support effect for the isolation layer 12, further improving the structural strength of the isolation layer 12, and thus improving the overall structure's support performance for the foundation pit. After the support rods 51 are inserted, the locking nut 46 is tightened (the locking nut 46 is not fully tightened during the insertion stage of the support rods 51), thereby further securing the mounting plates 4.

[0054] By providing a mounting plate 4 with a vibration damping layer 41 on the inner side of the isolation layer 12, since the isolation zone 13 is formed by multiple isolation layers 12, each isolation layer 12 in the isolation zone 13 has a vibration damping layer 41 on its inner side. If a vibration wave is to penetrate the isolation zone 13, it will inevitably need to penetrate multiple vibration damping layers 41. The vibration wave is further weakened by using multiple vibration damping layers 41, which greatly improves the vibration damping effect.

[0055] Example 3:

[0056] This application discloses a foundation pit vibration reduction barrier.

[0057] The difference between the foundation pit vibration reduction barrier disclosed in this application and Embodiment 2 is that:

[0058] Reference Figure 6 In this embodiment, the sliding rod 52 includes a first sliding part 521 and a second sliding part 522. One end of the first sliding part 521 is fixedly connected to the sliding plate 44, and the other end passes through the sliding groove 47 into the isolation area 13. A mounting sleeve 48 is fixedly installed on the side of the mounting plate 4 away from the isolation layer 12. The second sliding part 522 slides through the mounting sleeve 48 and is slidably mounted on the mounting plate 4 through the mounting sleeve 48.

[0059] The end of the second sliding part 522 away from the first sliding part 521 is used to abut against the guide surface 511 of the support rod 51. A sealing plate 523 is fixedly installed at the end of the second sliding part 522 near the first sliding part 521. The sealing plate 523 is used to push the first sliding part 521. Multiple sealing rings 524 are embedded in the surface of the sealing plate 523 near the first sliding part 521. The sealing rings 524 are in a ring shape around the central axis of the first sliding part 521. When the sliding plate 44 presses against the isolation layer 12, the sealing plate 523 abuts against the surface of the mounting plate 4, and a negative pressure is formed in the embedded groove 43.

[0060] The implementation principle of Embodiment 3 of this application is as follows: When the support rod 51 is inserted into the isolation zone 13, the support rod 51 pushes the second sliding part 522 through the guide surface 511, forcing the second sliding part 522 to slide towards the isolation layer 12, thereby pushing the first sliding part 521 into the mounting plate 4 through the sealing plate 523. At this time, the sealing plate 523 abuts against the mounting plate 4, preventing air in the isolation zone 13 from entering the embedding groove 43 through the sliding groove 47. Because the sliding plate 44 slides towards the side closer to the isolation layer 12 under the push of the first sliding part 521, it presses against the isolation layer 12, thereby forming a certain negative pressure in the embedding groove 43. Vibration waves rely on the collision of medium molecules for transmission. The air molecule density in the negative pressure space is lower than that at normal pressure, and the collision frequency between molecules is greatly reduced, thereby increasing the difficulty of vibration wave propagation and improving the vibration reduction effect of the overall structure.

[0061] Example 4:

[0062] This application also discloses a construction method for a vibration damping barrier.

[0063] A construction method for a vibration damping barrier specifically includes the following steps:

[0064] S1. Construct the main layer 1 within the foundation pit.

[0065] S2. Construct waterstop layer 2 within the foundation pit.

[0066] S3. Construct post-cast layer 3 within the foundation pit.

[0067] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A foundation pit vibration damping barrier, characterized in that: The system includes a main layer (1), a water-stop layer (2), and a post-cast layer (3), wherein the main layer (1) is located between the water-stop layer (2) and the post-cast layer (3); the main layer (1) includes multiple rows of support piles (11), each row of support piles (11) is spaced out with multiple piles, and adjacent rows of support piles (11) are staggered; an isolation layer (12) is provided between each pair of adjacent support piles (11), and multiple isolation layers (12) divide the space between adjacent rows of support piles (11) to form multiple isolation zones (13); each isolation layer (12) has an installation plate (4) on its surface near the isolation zone (13), the surface of the installation plate (4) near the isolation layer (12) has a vibration damping layer (41), and a locking plate (42) is connected between two adjacent installation plates (4) in the isolation zone (13); The mounting plate (4) near the isolation layer (12) has an embedded groove (43) on its surface. A sliding plate (44) is slidably installed in the embedded groove (43). A damping layer (41) is disposed on the surface of the sliding plate (44). A drive assembly (5) for driving the sliding plate (44) to press against the isolation layer (12) is provided in the isolation area (13). The drive assembly (5) includes a support rod (51) and a sliding rod (52). The support rod (51) is inserted into the isolation area (13). One end of the sliding rod (52) is connected to the sliding plate (44), and the other end passes into the isolation area (13). The outer wall of the support rod (51) is provided with a guide surface (511). When the support rod (51) is inserted downward, the support rod (51) pushes the sliding rod (52) through the guide surface (511) and forces the sliding plate (44) to press against the isolation layer (12).

2. The foundation pit vibration damping barrier according to claim 1, characterized in that: The support pile (11) is embedded with a steel cage, and the isolation layer (12) is embedded with steel bars. The two ends of the steel bars are inserted into two adjacent support piles (11) and connected to the steel cage of the support pile (11).

3. The foundation pit vibration damping barrier according to claim 1, characterized in that: The guide surface (511) includes a vertical section (512) and an inclined section (513). The inclined section (513) is located at the bottom of the vertical section (512). The inclined section (513) gradually approaches the support rod (51) from top to bottom. When the end of the sliding rod (52) away from the sliding plate (44) abuts against the vertical section (512), the sliding plate (44) abuts against the isolation layer (12).

4. The foundation pit vibration damping barrier according to claim 1, characterized in that: The outer wall of the support rod (51) is provided with a guide plate (514), and the outer wall of the guide plate (514) forms the guide surface (511); both sides of the guide plate (514) are connected with guide pieces (515), and the two guide pieces (515) are used to guide the sliding rod (52) to move into the guide surface (511) and restrict the rotation of the support rod (51).

5. The foundation pit vibration damping barrier according to claim 1, characterized in that: The sliding rod (52) includes a first sliding part (521) and a second sliding part (522). One end of the first sliding part (521) is connected to the sliding plate (44), and the other end passes through the isolation area (13). The second sliding part (522) is slidably installed on the side of the mounting plate (4) away from the isolation layer (12) to abut against the guide surface (511). The end of the second sliding part (522) near the first sliding part (521) is provided with a sealing plate (523) for pushing the first sliding part (521). The sealing plate (523) is fitted with a sealing ring (524) on its surface. When the sliding plate (44) abuts against the isolation layer (12), the sealing plate (523) abuts against the surface of the mounting plate (4), and a negative pressure is formed in the groove (43).

6. The foundation pit vibration damping barrier according to claim 1, characterized in that: The side wall of the mounting plate (4) is connected to a connecting post (45), and the locking plate (42) has a connecting groove. The connecting post (45) passes through the connecting groove and is connected to a locking nut (46). Each locking plate (42) is connected to a limiting plate (421). The limiting plates (421) of multiple locking plates (42) in the isolation area (13) surround each other to form a limiting channel (422) for the support rod (51) to pass through. The bottom of the isolation area (13) is pre-embedded with a positioning sleeve (131) for the support rod (51) to be inserted.

Images