Opening plugging structure for pipe-jacking construction of working well

Abstract

The utility model relates to the technical field of pipe jacking construction, and discloses a working well pipe jacking construction hole plugging structure which comprises a positioning frame of a rectangular structure, the positioning frame comprises a top plate and two side plates connected with the top plate, the top plate is used for abutting against an upward-pulling steel plate pile, and the rear end face of each side plate is fixedly connected with a clamping assembly. The clamping assembly is used for abutting against the front sides of the peripheral steel sheet piles. The plugging plate is located on the rear side of the positioning frame, the projection of the positioning frame in the front-back direction is located in the plugging plate, the edge of the plugging plate abuts against the rear side of the steel sheet pile, and a circular hole is formed in the middle of the plugging plate; the sleeve penetrates through the circular hole, the rear end of the sleeve extends along the circumferential side to form a stop ring, and the stop ring abuts against the rear end face of the plugging plate; the first fasteners are arranged on the peripheral side of the sleeve, and the two ends of each first fastener are connected with the positioning frame and the plugging plate respectively. According to the utility model, the condition of synchronous operation of a plurality of working procedures is reduced, and the leakproofness of the plugging structure is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe jacking construction, in particular to a hole plugging structure for pipe jacking construction in a working well. Background Art

[0002] With the development and utilization of urban underground space, the construction and maintenance of working wells, as important nodes connecting underground structures such as subways, tunnels, and pipelines, are increasingly valued. During the construction of working well pipe jacking, in order to ensure construction safety and unaffected surrounding environment, the entrance and exit holes of the working well pipe jacking must be effectively blocked.

[0003] The patent with announcement number CN215977300U discloses a device for sealing the top pipe opening in a Larsen steel sheet pile supported foundation pit. The device solves a series of problems that affect the project quality and bring construction safety hazards, such as earth collapse, mud loss, leakage or seepage at the top pipe opening in the Larsen steel sheet pile supported foundation pit during conventional practices, through the combination of supporting steel bars in the device to support the pulled-up Larsen steel sheet piles, sealing sleeves to protect the soil around the top pipe opening, and grouting pipes to reinforce the soil. However, this patent has the following defects: on the one hand, when installing the plugging sleeve, the pulled-up Larsen steel sheet piles need to be limited in the vertical direction, otherwise the vibration generated by the installation of the plugging sleeve may cause the pulled-up Larsen steel sheet piles to fall, which will lead to the plugging device being unable to be constructed in place at one time, that is, multiple processes are required to be carried out simultaneously during the installation of the plugging device, resulting in a cumbersome construction process; on the other hand, the plugging plate is positioned and fixed by the grouting pipe and the plugging sleeve, while no connecting device is provided at the edge of the plugging plate, and the fit between the edge of the plugging plate and the Larsen steel sheet pile is low, which will lead to a reduction in the airtightness of the groundwater, and then a part of the groundwater will flow into the working well, further leading to the instability of the construction working well and the occurrence of landslides and other installation accidents.

[0004] In view of this, how to change and design a working pit jacking construction hole plugging structure that is convenient to construct and has strong airtightness has become a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0005] In order to overcome the above-mentioned shortcomings, the utility model aims to provide a working shaft jacking construction hole plugging structure to reduce the situation of simultaneous operation of multiple processes and further improve the airtightness of the plugging structure.

[0006] In order to achieve the above purpose, the technical solution of the utility model is:

[0007] The hole plugging structure of the working pit jacking construction includes:

[0008] A positioning frame of rectangular structure, comprising a top plate and two side plates connected to the top plate, wherein the top plate is used to abut against the upper steel sheet piles, and a clamping assembly is fixedly connected to the rear end surface of the side plate, and the clamping assembly is used to abut against the front side of the surrounding steel sheet piles;

[0009] A blocking plate located at the rear side of the positioning frame, wherein the projection of the positioning frame in the front-to-back direction is located inside the blocking plate, the edge of the blocking plate abuts against the rear side of the steel sheet pile, and a circular hole is arranged in the middle of the blocking plate;

[0010] a sleeve penetrating the circular hole, the rear end of the sleeve extending along the circumferential side to form a stop ring, the stop ring abutting against the rear end surface of the blocking plate; and

[0011] A plurality of first fasteners are arranged on the peripheral side of the sleeve, and two ends of the first fasteners are respectively connected to the positioning frame and the blocking plate.

[0012] Furthermore, the positioning frame also includes a bottom plate, and the upper and lower ends of the two side plates are detachably connected to the top plate and the bottom plate respectively, and the top plate, the bottom plate and the two side plates form a rectangular structure.

[0013] Furthermore, the lower surface of the top plate and the upper surface of the bottom plate are respectively fixedly connected with fixing blocks, and the rear end surface of the fixing blocks is fixedly connected with the first fastener;

[0014] The side plate is made of I-beam, the flange plate of the I-beam is arranged in the left-right direction, and the rear end surface of the web of the I-beam is fixedly connected with a plurality of the first fasteners at intervals in the vertical direction.

[0015] Furthermore, the upper and lower ends of the side panels are respectively fixedly connected with connecting plates, and the connecting plates extend horizontally close to the sleeve direction to form a joint portion, and the joint portions at the upper and lower ends are respectively connected to the top plate and the bottom plate through second fasteners.

[0016] Furthermore, a reinforcing rib plate is fixedly arranged between the joint portion and the side plate.

[0017] Furthermore, the clamping assembly comprises:

[0018] A sleeve fixedly connected to the rear end surface of the side plate, wherein an opening is provided on a side of the sleeve away from the sleeve;

[0019] A wedge block slidably connected in the sleeve, wherein the inclined surface of the wedge block abuts against the front side of the peripheral steel sheet pile;

[0020] A jacking bolt is threadedly connected to a side of the sleeve close to the casing, the jacking bolt is arranged along the action direction, and one end of the screw rod of the jacking bolt away from the head of the jacking bolt abuts against the wedge block.

[0021] Furthermore, a plurality of grouting holes are arranged on the sealing plate located on the peripheral side of the casing, and a grouting pipe is arranged in the grouting hole, and the front end of the grouting pipe is embedded in the soil around the working well.

[0022] Furthermore, a gasket groove is provided on the front end surface of the blocking plate, a first sealing gasket is embedded in the gasket groove, and the front end of the first sealing gasket is respectively in contact with the top plate, the side plate and the bottom plate.

[0023] Furthermore, a second sealing gasket is provided between the stop ring and the sealing plate.

[0024] Furthermore, foam glue is filled between the blocking plate and the steel sheet piles opposite to the peripheral side of the positioning frame.

[0025] Compared with the prior art, the utility model has at least the following advantages:

[0026] The utility model utilizes the top plate to support the steel sheet piles to be pulled up, thereby realizing the limitation of the steel sheet piles in the vertical direction. In the later construction process, there is no need to simultaneously implement the pulling-up process of the steel sheet piles, which can avoid the phenomenon that the steel sheet piles pulled up in the later installation process fall and interfere with the construction process; the first fastener is used to realize the pulling connection relationship between the sealing plate and the positioning frame, thereby increasing the connection strength between the edge of the sealing plate and the steel sheet piles, and improving the airtightness between the edge of the sealing plate and the steel sheet piles; the middle part of the sealing plate is fixed by the friction force formed by the casing and the soil around the working well, thereby further improving the reliability of the installation of the sealing plate, and improving the deformation resistance of the sealing plate to the soil, thereby reducing the possibility of installation accidents such as collapse due to instability of the construction working well. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 It is a schematic diagram of the overall structure of the hole plugging structure for the top pipe construction of the working well of the utility model;

[0029] Figure 2 It is a schematic diagram of the overall structure of the utility model from another perspective of the working well jacking construction hole plugging structure;

[0030] Figure 3 For this utility model Figure 2 A partial enlarged view of the middle A area;

[0031] Figure 4 This is an exploded view of the hole plugging structure for the top pipe construction of the working well of the utility model;

[0032] Figure 5 This is an exploded view from another perspective of the hole blocking structure for the top pipe construction of the working shaft of the utility model.

[0033] Figure numerals: 1. steel sheet pile; 2. top plate; 3. bottom plate; 4. fixing block; 5. side plate; 6. connecting plate; 7. reinforcing rib plate; 8. sealing plate; 9. gasket slot; 10. grouting hole; 11. grouting pipe; 12. casing; 13. stop ring; 14. first fastener; 15. sleeve; 16. wedge block; 17. jacking bolt; 18. first sealing gasket; 19. second sealing gasket. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5The utility model provides a plugging structure for the opening of a working well jacking pipe construction, which is used to plug the area enclosed between the pulled-up part and the unpulled part of the steel sheet pile 1 and the bottom of the working well during the jacking pipe construction, so as to prevent water from seeping into the working well or collapsing. The specific structure includes a positioning frame, a plugging plate 8, a casing 12 and a first fastener 14. In the utility model, the jacking direction of the jacking pipe section is the forward direction. The positioning frame is a rectangular structure, made of steel, and includes a connected top plate 2 and two side plates 5. The top plate 2 is used to abut the pulled-up steel sheet pile 1. The rear end surface of the side plate 5 is fixedly connected with a plurality of clamping assemblies, and the plurality of clamping assemblies are arranged at intervals in the vertical direction, and the clamping assemblies abut the front side of the surrounding steel sheet pile 1. The plugging plate 8 is located at the rear side of the positioning frame, and the projection of the positioning frame along the front-to-back direction is located in the plugging plate 8. The edge of the plugging plate 8 abuts the rear side of the steel sheet pile 1, and a circular hole is arranged in the middle of the plugging plate 8. The casing 12 passes through the circular hole, and the inner diameter of the casing 12 matches the outer diameter of the jacking pipe section to be constructed. The front end of the casing 12 is embedded in the soil around the hole. The casing 12 can prevent the soil around the hole from deforming, loosening or collapsing. The rear end of the casing 12 extends along the circumferential side to form a stop ring 13, and the stop ring 13 abuts against the rear end face of the sealing plate 8; a plurality of first fasteners 14 are arranged on the circumferential side of the casing 12, and the two ends of the first fasteners 14 are respectively connected to the positioning frame and the sealing plate 8.

[0037] During installation, first, pull up the steel sheet piles 1 at the corresponding opening of the jacking construction hole, install a positioning frame in the area surrounded by the pulled-up part and the unpulled part of the steel sheet piles 1 and the bottom of the working well, and the top plate 2 is used to support the pulled-up steel sheet piles 1 to prevent the steel sheet piles 1 from falling during the later installation process. The side plates 5 are abutted and positioned with the front sides of the steel sheet piles 1 that have not been pulled up on the surrounding sides through the clamping assembly; secondly, install a blocking plate 8 on the rear end face of the positioning frame, and the projection size of the blocking plate 8 along the front-to-back direction is larger than the projection size of the positioning frame along the front-to-back direction. It is connected to the positioning frame through the first fastener 14, and the edge of the blocking plate 8 abuts against the rear side of the steel sheet pile 1, so that the first fastener 14 can realize the pulling between the blocking plate 8 and the positioning frame, thereby realizing the positioning of the surrounding side of the blocking plate 8, thereby improving the tightness of the edge of the blocking plate 8 and the steel sheet pile 1; finally, the sleeve 12 is installed through the circular hole of the blocking plate 8, and a large friction force is formed between the sleeve 12 and the soil around the working well. Relying on this friction force, the connection stability between the middle part of the blocking plate 8 and the soil around the working well can be achieved.

[0038] The utility model utilizes the top plate 2 to support the pulled-up steel sheet piles 1, which can avoid the phenomenon that the pulled-up steel sheet piles 1 fall down and interfere with the construction process during the later installation process; the first fastener 14 is used to realize the pulling connection relationship between the sealing plate 8 and the positioning frame, thereby increasing the connection strength between the edge of the sealing plate 8 and the steel sheet piles 1, and improving the airtightness between the edge of the sealing plate 8 and the steel sheet piles 1. The middle part of the sealing plate 8 is fixed by the friction formed by the casing 12 and the soil around the working well, thereby further improving the reliability of the installation of the sealing plate 8, and improving the deformation resistance of the sealing plate 8 against the soil, thereby reducing the possibility of instability of the working well.

[0039] The positioning frame also includes a bottom plate 3, and the upper and lower ends of the two side plates 5 are detachably connected to the top plate 2 and the bottom plate 3, respectively. The top plate 2, the bottom plate 3 and the two side plates 5 form a rectangular structure. The detachable connection method can realize the process of sequentially installing the bottom plate 3, the side plates 5 and the top plate 2 during the pulling process of the steel sheet pile 1.

[0040] The lower surface of the top plate 2 and the upper surface of the bottom plate 3 are respectively fixedly connected with a fixing block 4, and the rear end face of the fixing block 4 is fixedly connected with a first fastener 14. The material of the fixing block 4 is steel, and the first fastener 14 is a first bolt. The first bolt is arranged along the front-back direction, and the head of the first bolt is fixedly connected to the fixing block 4. The material of the side plate 5 is an I-beam, and the flange plate of the I-beam is arranged along the left-right direction. The rear end face of the web of the I-beam is fixedly connected with the first fastener 14. At this time, the head of the first bolt is fixedly connected to the rear end face of the web of the I-beam, and the first bolt is arranged at intervals in the vertical direction. In this way, the effect of arranging a plurality of first fasteners 14 at intervals on the positioning frame can be achieved.

[0041] Specifically, the upper and lower ends of the side plate 5 are respectively connected to the connecting plate 6 by welding, and the connecting plate 6 extends in the horizontal direction close to the sleeve 12 to form a joint, and the joints at the upper and lower ends are respectively connected to the top plate 2 and the bottom plate 3 by second fasteners, and the second fasteners are second bolts. A reinforcing rib plate 7 is provided between the joint and the side plate 5.

[0042] Reference Figure 3 The clamping assembly includes a sleeve 15, a wedge block 16 and a jacking bolt 17. The sleeve 15 is fixedly connected to the rear end surface of the side plate 5, and an opening is provided on the side of the sleeve 15 away from the sleeve 12; the wedge block 16 is slidably connected in the sleeve 15, and the jacking bolt 17 is threadedly connected to the side of the sleeve 15 close to the sleeve 12. The jacking bolt 17 is arranged in the left and right direction, and the end of the screw of the jacking bolt 17 away from the head of the jacking bolt 17 abuts against the wedge block 16. By screwing in the jacking bolt 17, the wedge block 16 can gradually slide out of the sleeve 15 until the inclined surface of the wedge block 16 abuts against the front side of the peripheral steel sheet pile 1.

[0043] Preferably, a plurality of grouting holes 10 are arranged on the sealing plate 8 located on the peripheral side of the casing 12, and a grouting pipe 11 is arranged in the grouting hole 10. The grouting pipe 11 is fixedly connected to the sealing plate 8, and the front end of the grouting pipe 11 extends into the soil on the peripheral side of the working well. The front end of the grouting pipe 11 is provided with grouting holes 10, and the rear end of the grouting pipe 11 extends out of the sealing plate 8 for connecting an external grouting hose (not shown in the figure).

[0044] Optionally, a gasket slot 9 is provided on the front end surface of the plugging plate 8, and a first sealing gasket 18 is embedded in the gasket slot 9, and the front end of the first sealing gasket 18 is respectively in contact with the top plate 2, the side plate 5 and the bottom plate 3, and the first sealing gasket 18 is used to improve the airtightness of the connection between the plugging plate 8 and the top plate 2, between the plugging plate 8 and the side plate 5, and between the plugging plate 8 and the bottom plate 3. A second sealing gasket 19 is provided between the stop ring 13 and the plugging plate 8, and the second sealing gasket 19 is used to improve the airtightness of the connection between the stop ring 13 and the plugging plate 8. In a specific embodiment of the utility model, the steel sheet pile 1 of the utility model adopts Larsen steel sheet pile, and the plugging plate 8 opposite to the peripheral side of the positioning frame and the steel sheet pile 1 are filled with foam (not shown in the figure), and the foam is used to improve the airtightness between the plugging plate 8 and the unpulled steel sheet pile 1.

[0045] The use process of this utility model:

[0046] First, a second bolt is sleeved on the bottom plate 3 so that the screw of the second bolt passes through the bottom plate 3, and the bottom plate 3 is installed after the steel sheet pile 1 is pulled up to a certain height; the outermost steel sheet pile 1 is gradually pulled out, and the side plate 5 is installed. By screwing the jacking bolt 17, the inclined surface of the wedge block 16 is abutted against the front side of the surrounding steel sheet pile 1 to achieve the installation and positioning of the side plate 5. The connecting plate 6 at the bottom of the side plate 5 is connected to the bottom plate 3 by the second bolt. After the two side plates 5 are installed, the steel sheet pile 1 is pulled out from the outside to the inside in turn, and then the connecting part is connected to the top plate by the second fastener to complete the installation process of the top plate 2. Secondly, the first sealing gasket 18 is embedded in the gasket slot, and the first sealing gasket 18 is opposite to the positioning frame. Then the first fastener 14 is used to complete the connection between the plugging plate 8 and the positioning frame, so that the grouting pipe 11 penetrates into the soil around the construction well. Next, install the second sealing gasket 19 on the sleeve 12, so that the second sealing gasket 19 is sleeved on the sleeve 12, and ensure that the second sealing gasket 19 is in contact with the stop ring 13, and then pass the sleeve 12 through the circular hole to achieve the installation of the sleeve 12, and ensure that the second sealing gasket 19 is in contact with the plugging plate 8. Finally, grouting is performed through the grouting pipe 11 in the plugging plate 8, and a reinforced soil layer is formed around the jacking pipe in the soil adjacent to the jacking pipe through grouting, thereby protecting the jacking pipe and preventing the soil and groundwater from pouring into the working machine when the jacking pipe is opened later. Since the steel sheet pile 1 of the utility model adopts Larsen steel sheet piles, it is necessary to fill the gap between the plugging plate 8 and the steel sheet pile 1 opposite to the peripheral side of the positioning frame with foam glue to improve the airtightness between the plugging plate 8 and the steel sheet pile 1.

[0047] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A plugging structure for the opening of a working well pipe jacking construction, characterized in that: include: A positioning frame with a rectangular structure, the positioning frame comprising a top plate (2) and two side plates (5) connected to the top plate (2), the top plate (2) being used to abut against a pull-up steel sheet pile (1), the rear end surface of the side plate (5) being fixedly connected with a clamping assembly, the clamping assembly being used to abut against the front side of the surrounding steel sheet pile (1); a blocking plate (8) located at the rear side of the positioning frame, the projection of the positioning frame in the front-to-back direction being located inside the blocking plate (8), the edge of the blocking plate (8) abutting against the rear side of the steel sheet pile (1), and a circular hole being arranged in the middle of the blocking plate (8); A sleeve (12) passes through the circular hole, the rear end of the sleeve (12) extending along the circumferential side to form a stop ring (13), and the stop ring (13) abuts against the rear end surface of the blocking plate (8); as well as A plurality of first fasteners (14) are arranged on the peripheral side of the sleeve (12), and two ends of the first fasteners (14) are respectively connected to the positioning frame and the blocking plate (8).

2. The working pit jacking construction hole plugging structure according to claim 1 is characterized in that: The positioning frame also includes a bottom plate (3), and the upper and lower ends of the two side plates (5) are detachably connected to the top plate (2) and the bottom plate (3) respectively, and the top plate (2), the bottom plate (3) and the two side plates (5) form a rectangular structure.

3. The working pit jacking construction hole plugging structure according to claim 2 is characterized in that: The lower surface of the top plate (2) and the upper surface of the bottom plate (3) are respectively fixedly connected with a fixing block (4), and the rear end surface of the fixing block (4) is fixedly connected with the first fastener (14); The side plate (5) is made of an I-beam, the flange plate of the I-beam is arranged in the left-right direction, and the rear end surface of the web of the I-beam is fixedly connected with a plurality of the first fasteners (14) at intervals in the vertical direction.

4. The working pit jacking construction hole plugging structure according to claim 3 is characterized in that: The upper and lower ends of the side plate (5) are respectively fixedly connected with connecting plates (6), and the connecting plates (6) extend in a horizontal direction close to the sleeve (12) to form a joint portion, and the joint portions at the upper and lower ends are respectively connected to the top plate (2) and the bottom plate (3) through second fasteners.

5. The working pit jacking construction hole plugging structure according to claim 4 is characterized in that: A reinforcing rib plate (7) is fixedly arranged between the joint portion and the side plate (5).

6. The working pit jacking construction hole plugging structure according to claim 1 is characterized in that: The clamping assembly comprises: A sleeve (15) fixedly connected to the rear end surface of the side plate (5), wherein the sleeve (15) is provided with an opening on a side away from the sleeve (12); A wedge block (16) slidably connected in the sleeve (15), wherein the inclined surface of the wedge block (16) abuts against the front side of the peripheral steel sheet pile (1); A jacking bolt (17) is threadedly connected to the sleeve (15) on the side close to the casing (12), and the jacking bolt (17) is arranged along the action direction, and the end of the screw rod of the jacking bolt (17) away from the head of the jacking bolt (17) abuts against the wedge block (16).

7. The working pit jacking construction hole plugging structure according to claim 2 is characterized in that: A plurality of grouting holes (10) are arranged on the sealing plate (8) located on the peripheral side of the casing (12), and a grouting pipe (11) is arranged in the grouting hole (10), and the front end of the grouting pipe (11) is embedded in the soil around the working well.

8. The working pit jacking construction hole plugging structure according to claim 7 is characterized in that: A gasket groove (9) is provided on the front end surface of the sealing plate (8), a first sealing gasket (18) is embedded in the gasket groove (9), and the front end of the first sealing gasket (18) is respectively in contact with the top plate (2), the side plate (5) and the bottom plate (3).

9. The working pit jacking construction hole plugging structure according to claim 8, characterized in that: A second sealing gasket (19) is provided between the stop ring (13) and the sealing plate (8).

10. The working pit jacking construction hole plugging structure according to any one of claims 1 to 9, characterized in that: The space between the blocking plate (8) and the steel sheet pile (1) opposite to the peripheral side of the positioning frame is filled with foamed rubber.

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