Construction technology for achieving existing line fender post breaking and removing through lateral retraction method
By combining lateral retraction with grouting reinforcement with a specially designed chiseling device, the construction difficulties and safety hazards of removing existing line retaining piles were solved, achieving efficient and safe construction results.
Patent Information
- Application Number
- CN202511437082.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-09
- Publication Date
- 2026-02-06
AI Technical Summary
During subway construction, the retaining piles of existing stations are closely attached to the side walls of the operational track area. When they are demolished, the vibration affects the operation. Furthermore, traditional construction methods are inefficient and pose significant safety hazards. Construction is particularly difficult and time-sensitive when the external attachments are buried at great depths.
The lateral retraction method is adopted, by retracting the side wall of the second basement level profile close to the existing line by 1.1 to 1.3 meters relative to the first basement level profile, reducing the length of the retaining piles that need to be removed. The existing line is reinforced by grouting and the well wall is reinforced by inverted hanging. The retaining piles are then broken by a specially designed removal device.
It reduced construction difficulty, improved construction efficiency, reduced safety risks, avoided impact on the operation of existing lines, and saved costs.
Smart Images
Figure CN121473338A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of retaining pile removal technology, and in particular to the construction process of removing retaining piles of existing railway lines using the lateral retraction method. Background Technology
[0002] During subway construction, when the side wall to be constructed is close to the side wall of an existing station, it is necessary to remove the retaining piles of the existing station. However, this method requires the removal of a large number of retaining piles.
[0003] Secondly, the retaining piles of existing stations are closely attached to the side walls of the already operational track area. Breaking them would cause vibrations that would affect the normal operation of the existing lines. For example, dry-hanging tiles and decorations might fall off, leading to passenger injuries and noise complaints.
[0004] Secondly, the external auxiliary structures are buried at a greater depth than the existing stations. In areas where the external auxiliary structures are buried at a greater depth than the existing stations, the soil beneath the existing stations will be exposed and unsupported when the retaining piles of the existing stations are removed. Traditional methods consider using soil grouting reinforcement before removal and inverted hanging of the well wall after removal. However, the removal cannot expose the unsupported soil in one go, and multiple cycles of skipped-width construction are required, and construction must be carried out during the nighttime maintenance window of the existing lines. The efficiency of removing retaining piles is low, and the construction period is under great pressure. Summary of the Invention
[0005] The purpose of this application is to provide a lateral retraction method for the construction of existing railway line retaining piles, so as to improve the problem that the high-altitude construction of tie beams is relatively troublesome and has high safety hazards.
[0006] Firstly, the lateral retraction method provided in this application for demolishing existing railway line retaining piles employs the following technical solution: The lateral retraction method for removing existing railway line retaining piles includes the following steps: S1, constructing the outlines of the external auxiliary second basement level and the first basement level to the set position; S2, when constructing the outline of the external auxiliary second basement level, the side wall of the second basement level outline closest to the existing railway line is retracted by 1.1 to 1.3 meters relative to the outline of the first basement level; S3, removing the retaining piles of the first basement level using a chisel-removing device.
[0007] By adopting the above technical solution, the side wall of the second basement level, which is closer to the existing line, is recessed by 1.1 to 1.3 meters relative to the first basement level. This prevents the second basement level from interfering with the retaining piles, thus requiring only the removal of the retaining piles on the first basement level. The length of the retaining piles to be removed on the first basement level is greatly reduced, thereby lowering the construction difficulty and improving the construction efficiency. At the same time, since the retaining piles on the second basement level do not need to be removed, there is no need to excavate the soil under the existing line slab. Construction can be carried out without being affected by operating traffic, and the safety risks are greatly reduced.
[0008] Optionally, before constructing the outline of the second basement level, the soil beneath the existing line is reinforced by grouting, and an inverted well wall is constructed on the side wall of the soil.
[0009] The above technical solution involves grouting and reinforcing the soil beneath the existing line, and constructing an inverted well wall on the sidewall of the soil to reinforce the existing line and reduce safety hazards.
[0010] Optionally, the chiseling device includes a first bracket and a second bracket. The first bracket is installed above the existing line, and the second bracket is installed on the ground floor of the basement. The tops of the first bracket and the second bracket are connected by a connecting frame. A first chiseling component is installed on the first bracket, and a second chiseling component is installed on the second bracket. The first chiseling component and the second chiseling component are arranged opposite to each other on both sides of the retaining pile. A cleaning component for clearing gravel is installed on the connecting frame.
[0011] With the above technical solution, traditional pile breakers are generally circular and can be fitted onto the piles that need to be broken. However, due to the grouting filling between adjacent retaining piles, there is no gap between them. Therefore, by installing a first support and a second support on both sides of the retaining pile, and then using the first and second chiseling components that are set up opposite to each other to chisel the retaining pile, the chiseling of the retaining pile can be completed under the condition of limited space.
[0012] Optionally, the first chiseling assembly includes a first jack, a fixed frame, and a chisel. The first jack is arranged vertically and connected to a first support. The fixed frame is connected to the movable end of the first jack. The chisel is arranged horizontally and mounted on the fixed frame.
[0013] Through the above technical solution, the chisel can be an independent component removed from the pile breaker. The chisel can be installed on the fixed frame to chisel the retaining piles, which can save certain costs. At the same time, the first jack can drive the fixed frame to move vertically so that the chisel can lift the gravel generated by the pile breaking, which makes it easier for the cleaning component to clean up the gravel.
[0014] Optionally, the chisel includes a second jack and a chisel head. The second jack is arranged horizontally and fixedly installed on a fixed frame. The chisel head is connected to the movable end of the second jack.
[0015] The above technical solution uses a second jack to provide power to the chisel head so as to break up the retaining piles.
[0016] Optionally, the cleaning assembly includes a cleaning plate and a hopper. The cleaning plate is hinged to a connecting frame, and the hopper is connected to the connecting frame. A third jack is hinged to the connecting frame, and the movable end of the third jack is hinged to the cleaning plate to drive the cleaning plate to push the crushed stone into the hopper.
[0017] By adopting the above technical solution, when cleaning the crushed stone, the cleaning plate is driven to rotate by the third jack, which pushes the crushed stone from the self-healing part into the hopper, thereby cleaning the crushed stone.
[0018] Optionally, the bottom of the hopper is provided with a discharge trough, and a discharge cover is hinged to the side wall of the discharge trough. The discharge cover is detachably connected to the hopper.
[0019] By adopting the above technical solution, when it is necessary to process the crushed stone in the hopper, the discharge cover is opened and the crushed stone flows out from the discharge chute, thus completing the transfer of the crushed stone.
[0020] Optionally, the cleaning plate is provided with a scraping part, which is made of silicone.
[0021] The aforementioned technical solution allows the silicone scraper to be easily lifted, thus enabling better cleaning of the crushed stone.
[0022] Optionally, a movable component is provided on the first support and the second support respectively, and the movable component is used to drive the first support or the second support to move.
[0023] By adopting the above technical solution, the first and second supports can be easily moved by the movable components, thereby enabling the removal of retaining piles in the same row but at different locations.
[0024] Optionally, the moving component includes a fourth jack and a fixed plate, the fourth jack being connected to the fixed plate, and the movable end of the fourth jack being connected to a first bracket or a second bracket.
[0025] By adopting the above technical solution, when moving the first or second support, the fixing plate is first connected to the ground floor of the first basement level. Then, the fourth jack drives the first or second support to move. After the first or second support is moved into place, the connection between the fixing plate and the ground floor of the first basement level is released. Then, the fourth jack is reset. The movement of the first or second support can be achieved in the above manner.
[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The side wall of the second basement level, which is closer to the existing line, is recessed by 1.1 to 1.3 meters relative to the first basement level. This prevents the second basement level from interfering with the retaining piles. As a result, only the retaining piles of the first basement level need to be removed. The length of the retaining piles to be removed from the first basement level is greatly reduced, which reduces the construction difficulty and improves the construction efficiency. At the same time, since the retaining piles of the second basement level do not need to be removed, there is no need to excavate the soil under the existing line slab. Construction can be carried out without being affected by operating traffic, and the safety risks are greatly reduced. 2. By grouting and reinforcing the soil beneath the existing line, and constructing inverted manhole walls on the sidewalls of the soil, the existing line is reinforced, reducing safety hazards; 3. Traditional pile breakers are generally circular and can be fitted onto the piles to be broken. However, due to grouting, there is no gap between adjacent retaining piles. Therefore, by installing a first support and a second support on both sides of the retaining pile, and then using the first and second chiseling components that are set up opposite to each other, the retaining piles can be chiseled away, thus completing the chiseling of the retaining piles under limited space. 4. The chisel can be an independent component removed from the pile breaker. The chisel can be installed on the fixed frame to chisel the retaining piles, which can save some costs. At the same time, the first jack can drive the fixed frame to move vertically so that the chisel can lift the gravel generated by the pile breaking, which makes it easier for the cleaning component to clean up the gravel. 5. Power is supplied to the chisel head via the second jack in order to break up the retaining piles; 6. When cleaning the crushed stone, the cleaning plate is driven to rotate by the third jack, pushing the crushed stone from the chisel and remover into the hopper to clean the crushed stone; 7. When it is necessary to process the crushed stone in the hopper, open the discharge cover and the crushed stone will flow out from the discharge chute, completing the transfer of the crushed stone; 8. The scraper head made of silicone makes it easier to lift the chisel head, thus better cleaning up the gravel; 9. When moving the first or second support, first connect the fixing plate to the ground floor of the first basement level, then the fourth jack drives the first or second support to move. After the first or second support is in place, disconnect the fixing plate from the ground floor of the first basement level, and then the fourth jack resets. The first or second support can be moved in the above manner. Attached Figure Description
[0027] Figure 1 This is a cross-sectional schematic diagram illustrating the overall vibration reduction device for the floor slab of a building adjacent to the subway in this invention.
[0028] Figure 2 This is a schematic diagram illustrating the structure of the chiseling device in this invention.
[0029] Figure 3 This is a structural schematic diagram illustrating the fixed frame and the chisel-removing component in this invention.
[0030] Figure 4 This is a schematic diagram illustrating the structure of the cleaning component in this invention, showing the removal of a portion of the connecting frame.
[0031] In the diagram, 1. Basement Level 1; 2. Basement Level 2; 3. Existing power line; 31. Retaining piles; 4. Chiseling device; 41. First support; 42. Second support; 43. Connecting frame; 44. First chiseling assembly; 441. First jack; 442. Fixing frame; 443. Chiseling component; 4431. Second jack; 4432. Chiseling head; 45. Second chiseling assembly; 46. Cleaning assembly; 461. Cleaning plate; 4611. Scraper; 462. Hopper; 4621. Discharge cover; 463. Third jack; 47. Fourth jack; 48. Fixing plate. Detailed Implementation
[0032] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.
[0033] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; as a direct connection or an indirect connection through an intermediate medium; or as a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0034] Example 1 Firstly, this application discloses a construction process for removing retaining piles of existing railway lines using the lateral retraction method.
[0035] The lateral retraction method is used to demolish the retaining piles of existing railway lines. (Refer to...) Figure 1 It includes the following steps: S1. Construct the outline of the external auxiliary second basement level 2 and the first basement level 1 to the designated position. Before constructing the outline of the second basement level 2, grout the soil under the existing line 3 for reinforcement, and construct the inverted well wall on the side wall of the soil.
[0036] By grouting and reinforcing the soil beneath existing line 3, and constructing inverted well walls on the sidewalls of the soil, existing line 3 is reinforced, reducing safety hazards.
[0037] S2. When constructing the external auxiliary structure of the second basement level 2, the side wall of the second basement level 2 structure closest to the existing line 3 shall be recessed by 1.1 to 1.3 meters relative to the first basement level 1 structure.
[0038] S3. The retaining piles 31 of the basement 1 are removed by the chiseling device 4.
[0039] Specifically, refer to Figures 2 to 4 The chiseling device 4 includes a first support 41 and a second support 42. The first support 41 is installed above the existing line 3, and the second support 42 is installed on the ground of the basement 1. The tops of the first support 41 and the second support 42 are connected by a connecting frame 43. A first chiseling component 44 is installed on the first support 41, and a second chiseling component 45 is installed on the second support 42. The first chiseling component 44 and the second chiseling component 45 are arranged opposite to each other on both sides of the retaining pile 31. A cleaning component 46 for cleaning up gravel is installed on the connecting frame 43.
[0040] Traditional pile breakers are generally circular and can be fitted onto the piles to be broken. However, since grouting is usually used to fill the gaps between adjacent retaining piles 31, they are connected as one unit, resulting in no gaps between them. Therefore, by installing a first support 41 and a second support 42 on both sides of the retaining pile 31, and then using the first chiseling component 44 and the second chiseling component 45 arranged opposite to each other, the retaining pile 31 can be chiseled away, thus completing the chiseling of the retaining pile 31 under limited space.
[0041] More specifically, the first chiseling assembly 44 includes a first jack 441, a fixed frame 442, and a chisel 443. The first jack 441 is vertically oriented and connected to the first support 41. The fixed frame 442 is connected to the movable end of the first jack 441. The chisel 443 is horizontally oriented and mounted on the fixed frame 442. The chisel 443 can be an independent component removed from the pile breaker. Mounting the chisel 443 on the fixed frame 442 to chisel the retaining pile 31 can save costs. At the same time, the first jack 441 can drive the fixed frame 442 to move vertically, so that the chisel 443 can lift the gravel generated by breaking the pile, thereby facilitating the cleaning assembly 46 to clean up the gravel.
[0042] The chisel-breaking component 443 includes a second jack 4431 and a chisel-breaking head 4432. The second jack 4431 is horizontally positioned and fixedly mounted on a fixed frame 442. The chisel-breaking head 4432 is connected to the movable end of the second jack 4431. The second jack 4431 provides power to the chisel-breaking head 4432 to break up the retaining piles 31. The force exerted by the second jack 4431 during operation is mainly transmitted to the first support 41 or the second support 42 through the fixed frame 442 to avoid excessive pressure on the first jack 441.
[0043] The cleaning assembly 46 includes a cleaning plate 461 and a hopper 462. The cleaning plate 461 is hinged to a connecting frame 43, and the hopper 462 is connected to the connecting frame 43. A third jack 463 is hinged to the connecting frame 43, and the movable end of the third jack 463 is hinged to the cleaning plate 461 to drive the cleaning plate 461 to push the crushed stone into the hopper 462. When cleaning the crushed stone, the cleaning plate 461 is driven to rotate by the third jack 463, pushing the crushed stone from the chisel-removing component 443 into the hopper 462, thereby cleaning the crushed stone.
[0044] The bottom of the hopper 462 has a discharge chute, and a discharge cover 4621 is hinged to the side wall of the discharge chute. The discharge cover 4621 is detachably connected to the hopper 462. When it is necessary to process the crushed stone in the hopper 462, the discharge cover 4621 is opened, and the crushed stone flows out from the discharge chute, completing the transfer of the crushed stone. The cleaning plate 461 is equipped with a scraper part 4611, which is made of silicone. The silicone scraper part 4611 facilitates the lifting of the chisel head 4432, thereby better cleaning the crushed stone.
[0045] Each of the first support 41 and the second support 42 is equipped with a movable component, which is used to drive the first support 41 or the second support 42 to move. The movable component facilitates the movement of the first support 41 and the second support 42, thereby enabling the removal of retaining piles 31 in the same row but at different locations.
[0046] The moving assembly includes a fourth jack 47 and a fixed plate 48. The fourth jack 47 is connected to the fixed plate 48, and the movable end of the fourth jack 47 is connected to the first bracket 41 or the second bracket 42. When moving the first bracket 41 or the second bracket 42, the fixed plate 48 is first connected to the ground of the basement level 1. Then, the fourth jack 47 drives the first bracket 41 or the second bracket 42 to move. After the first bracket 41 or the second bracket 42 moves into place, the connection between the fixed plate 48 and the ground of the basement level 1 is released, and then the fourth jack 47 is reset. The movement of the first bracket 41 or the second bracket 42 can be achieved in the above manner.
[0047] Working principle: The side wall of the second basement level 2, which is close to the existing line 3, is recessed by 1.1 to 1.3 meters relative to the outline of the first basement level 1. This prevents the outline of the second basement level 2 from interfering with the retaining piles 31. As a result, only the retaining piles 31 of the first basement level 1 need to be removed. The length of the retaining piles 31 that need to be removed from the first basement level 1 is greatly reduced, thereby reducing the construction difficulty and improving the construction efficiency. At the same time, since the retaining piles 31 of the second basement level 2 do not need to be removed, there is no need to excavate the soil under the existing line 3. The construction can be carried out without being affected by the operation of trains, and the safety risks are greatly reduced.
[0048] Traditional pile breakers are generally circular and can be fitted onto the piles to be broken. However, due to grouting, there is no gap between adjacent retaining piles 31. Therefore, by installing a first support 41 and a second support 42 on both sides of the retaining pile 31, and then using the oppositely arranged first chiseling component 44 and second chiseling component 45, the retaining pile 31 can be chiseled away, thus completing the chiseling of the retaining pile 31 under limited space.
[0049] The chisel-removing component 443 can be an independent part removed from the pile breaker. Installing the chisel-removing component 443 onto the fixed frame 442 allows for the removal of the retaining piles 31, saving costs. Simultaneously, the first jack 441 can drive the fixed frame 442 to move vertically, allowing the chisel-removing component 443 to lift the debris generated during pile breaking, thus facilitating the cleaning component 46 to clean up the debris. The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. 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 construction technique for demolishing retaining piles of existing railway lines using the lateral retraction method, characterized in that... Includes the following steps: S1. Construct the outline of the external auxiliary second basement level (2) and the first basement level (1) to the set position; S2. When constructing the outline of the external auxiliary second basement level (2), the side wall of the outline of the second basement level (2) close to the existing line (3) shall be recessed by 1.1 to 1.3 meters relative to the outline of the first basement level (1); S3. The retaining piles (31) of the first basement level (1) are removed by the chiseling device (4).
2. The construction process for demolishing existing railway retaining piles using the lateral retraction method according to claim 1, characterized in that: Before constructing the outline of the second basement level (2), the soil below the existing line (3) is reinforced by grouting, and an inverted well wall is constructed on the side wall of the soil.
3. The construction process for demolishing existing railway retaining piles using the lateral retraction method according to claim 2, characterized in that: The chiseling device (4) includes a first bracket (41) and a second bracket (42). The first bracket (41) is installed above the existing line (3), and the second bracket (42) is installed on the ground of the basement (1). The tops of the first bracket (41) and the second bracket (42) are connected by a connecting frame (43). A first chiseling component (44) is installed on the first bracket (41), and a second chiseling component (45) is installed on the second bracket (42). The first chiseling component (44) and the second chiseling component (45) are arranged opposite to each other on both sides of the retaining pile (31). A cleaning component (46) for cleaning up gravel is installed on the connecting frame (43).
4. The construction process for demolishing existing railway retaining piles using the lateral retraction method according to claim 3, characterized in that: The first chiseling assembly (44) includes a first jack (441), a fixed frame (442), and a chiseling component (443). The first jack (441) is arranged vertically and connected to a first support (41). The fixed frame (442) is connected to the movable end of the first jack (441). The chiseling component (443) is arranged horizontally and mounted on the fixed frame (442).
5. The construction process for demolishing existing railway retaining piles using the lateral retraction method according to claim 4, characterized in that: The chisel-removing component (443) includes a second jack (4431) and a chisel-removing head (4432). The second jack (4431) is arranged in a horizontal direction and is fixedly installed on the fixed frame (442). The chisel-removing head (4432) is connected to the movable end of the second jack (4431).
6. The construction process for demolishing existing railway retaining piles using the lateral retraction method according to claim 5, characterized in that: The cleaning assembly (46) includes a cleaning plate (461) and a hopper (462). The cleaning plate (461) is hinged to a connecting frame (43), and the hopper (462) is connected to the connecting frame (43). A third jack (463) is hinged to the connecting frame (43). The movable end of the third jack (463) is hinged to the cleaning plate (461) to drive the cleaning plate (461) to push the gravel into the hopper (462).
7. The construction process for demolishing existing railway retaining piles using the lateral retraction method according to claim 6, characterized in that: The bottom of the hopper (462) is provided with a discharge trough, and a discharge cover (4621) is hinged to the side wall of the discharge trough. The discharge cover (4621) is detachably connected to the hopper (462).
8. The construction process for demolishing existing railway retaining piles using the lateral retraction method according to claim 7, characterized in that: The cleaning plate (461) is provided with a scraper (4611), which is made of silicone.
9. The construction process for demolishing existing railway retaining piles using the lateral retraction method according to claim 7, characterized in that: Each of the first support (41) and the second support (42) is provided with a moving component, which is used to drive the first support (41) or the second support (42) to move.
10. The construction process for demolishing existing railway retaining piles using the lateral retraction method according to claim 9, characterized in that: The moving component includes a fourth jack (47) and a fixed plate (48), the fourth jack (47) being connected to the fixed plate (48), and the movable end of the fourth jack (47) being connected to a first bracket (41) or a second bracket (42).