Pipe jacking construction structure for underground works and method of construction thereof

Abstract

This application relates to the technical field of underground engineering, and in particular to a pipe jacking construction structure and construction method for underground engineering. The structure includes a pipe jacking, a jacking head, and jacks installed in a working pit. A guiding device is installed in the working pit. The guiding device includes a guide rail installed in the working pit, a support component installed on the guide rail for supporting the pipe jacking and the jacking head, and a connecting component installed at one end of the guide rail for connecting the guide rail to the working pit. The pipe jacking and the jacking head slide in cooperation with the support component along the jacking direction. This application has the effect of reducing the tendency for pipe jacking to deviate.

Description

Technical Field

[0001] This application relates to the technical field of underground engineering, and in particular to a pipe jacking construction structure and construction method for underground engineering. Background Technology

[0002] Cities require the construction of numerous tunnels, and tunnel construction projects typically employ non-cut-and-cover techniques. Among these, earth pressure balance (EPB) pipe jacking is a type of EPB technique. EPB pipe jacking is generally suitable for pipeline construction with a diameter of D1500-3600mm. Due to its advantages such as long jacking distance, no need for dewatering, effective control of ground subsidence, and construction safety, EPB pipe jacking can achieve excellent results in special engineering sections such as those crossing important highways, railways, and buildings, as well as in special geological structures such as sand layers and silty clay.

[0003] Existing pipe jacking construction structures typically include a pipe jacking machine, a jacking head, and jacks installed in the working pit. The jacks push the pipe jacking machine forward, thereby driving the jacking head to carry out pipe jacking operations.

[0004] The aforementioned technologies have the drawback that the jacking pipe is prone to displacement during the jacking process. Summary of the Invention

[0005] In order to reduce the tendency of pipe jacking to deviate, this application provides a pipe jacking construction structure and construction method for underground engineering.

[0006] Firstly, this application provides a pipe jacking construction structure for underground engineering, which adopts the following technical solution:

[0007] A pipe jacking construction structure for underground engineering includes a pipe jacking, a jacking head, and jacks installed in a working pit. A guiding device is installed in the working pit. The guiding device includes a guide rail installed in the working pit, a support component installed on the guide rail for supporting the pipe jacking and the jacking head, and a connecting component installed at one end of the guide rail for connecting the guide rail to the working pit. The pipe jacking and the jacking head slide in cooperation with the support component along the jacking direction.

[0008] By adopting the above technical solution, the guide device is set up, and the guide rail is fixedly installed in the working pit through the connecting component. Then, the jacking pipe and the machine head are placed on the connecting component, and the support component supports the jacking pipe and the machine head. At the same time, the jacking pipe, the machine head and the support component slide together along the jacking direction, so that the jacking pipe and the machine head can always slide along the support component during the jacking operation, thereby reducing the phenomenon that the jacking pipe is prone to deviation.

[0009] Optionally, the support assembly includes a support plate disposed on the guide rail for supporting the bottom of the jacking pipe and the machine head, and a plurality of clamping plates rotatably fitted on the guide rail for clamping the jacking pipe and the machine head.

[0010] By adopting the above technical solution, multiple clamping plates are used to clamp the jacking pipe and the machine head, making the support of the clamping plates for the jacking pipe and the machine head more compact and stable, which can further reduce the phenomenon that the jacking pipe is prone to displacement.

[0011] Optionally, the guide rail is provided with a rotating device, which includes a rotating rod for driving the clamping plate to rotate, a rotating assembly for driving the rotating rod to rotate, and an adjusting assembly for driving the rotating assembly to rotate.

[0012] By adopting the above technical solution, and through the setting of the rotating device, when the adjusting component drives the rotating component to rotate, it can drive the rotating rod to rotate, which in turn can drive the clamping plate to rotate. When one end of the clamping plate rotates towards the top pipe and the machine head, it can support the top pipe and the machine head.

[0013] Optionally, the rotating assembly includes a sliding rack, a pushing rack, and a gear that are slidably fitted on the guide rail and used to drive the rotating rod to rotate. The gear is located between the sliding rack and the pushing rack, and the gear meshes with both the sliding rack and the pushing rack.

[0014] By adopting the above technical solution, when the rack is pushed to slide, it can drive the gear to rotate, which in turn drives the sliding rack to slide. When the sliding rack slides, it can drive the rotating rod to rotate, thereby realizing the rotation adjustment of the rotating rod.

[0015] Optionally, the adjustment assembly includes a connecting plate connected to the push rack, a pressing block for pushing two adjacent connecting plates away from each other, and an elastic element for pulling two adjacent connecting plates closer to each other. The pressing block is slidably fitted on the guide rail along the height direction of the working pit. The side of the pressing block near the connecting plate is provided with a pressing surface for pressing the connecting plate. The connecting plate is slidably fitted on the guide rail.

[0016] By adopting the above technical solution, when the jacking pipe and the machine head are placed close to the guide rail, the extrusion block can be squeezed, thereby pushing the two connecting plates to slide in opposite directions, stretching the elastic element, driving the rack to slide, driving the gear to rotate, causing the sliding rack to slide, and driving the rotating rod to rotate. One end of the clamping plate rotates closer to the jacking pipe, thereby supporting the jacking pipe and the machine head.

[0017] Optionally, the guide rail is provided with a groove, and the extrusion block is provided with a slider that slides into the groove.

[0018] By adopting the above technical solution and setting the slide groove, the extrusion block can drive the slider to slide along the slide groove when it moves, thereby making the movement of the extrusion block in the vertical direction more stable.

[0019] Optionally, a reinforcing rod is connected to the push rack, and after the jacking tube and the machine head are pressed against the clamping plate, the reinforcing rod is pressed against the side wall of the working pit.

[0020] By adopting the above technical solution, the reinforcement rod is installed so that when the jacking pipe and the machine head are pressed against the connecting plate, and after the jacking pipe and the machine head are pressed against the clamping plate, the reinforcement rod can be pushed to slide and press against the side wall of the working pit, thereby limiting the displacement of the guide rail in the working pit along the length direction of the reinforcement rod, thus making the installation of the guide rail in the working pit more stable.

[0021] Optionally, the working pit is provided with an installation hole, and the connecting assembly includes a connecting ring installed on the guide rail and in the installation hole, and a pre-embedded part disposed on the connecting ring for connecting the connecting ring to the working pit.

[0022] By adopting the above technical solution, installation holes are excavated in the working pit, and the connecting ring is fixedly installed in the working pit through pre-embedded parts, which can achieve the initial installation of the guide rail, limit the guide rail, and then guide and support the jacking pipe and the machine head.

[0023] Optionally, the jacking pipe and the machine head are slidably fitted within the connecting ring.

[0024] By adopting the above technical solution and setting the connecting ring, the jacking pipe and the machine head can slide along the connecting ring when they are jacking. The connecting ring limits the position of the jacking pipe and the machine head, reducing the phenomenon that the jacking pipe is prone to deviating during jacking.

[0025] Secondly, a method for pipe jacking construction in underground engineering, utilizing the aforementioned pipe jacking construction structure for underground engineering, includes the following:

[0026] Working pit excavation: A working pit is excavated vertically downwards on the ground to be constructed;

[0027] Guide device installation: Lay the guide rails at the bottom of the working pit and install the guide rails into the working pit through the connecting components;

[0028] Construction structure installation: Install the jacks onto the working pit, and place the jacking pipe and jacking head onto the support components;

[0029] Pipe jacking: Jacks push the jacking pipe and the jacking machine head to the position to be jacked, so as to carry out construction operations.

[0030] By adopting the above technical solution, when constructing pipe jacking, a working pit is first excavated, then a guiding device is installed in the working pit, and jacks, pipe jacking, and machine head are installed. Subsequently, the jacks push the pipe jacking and machine head for jacking construction, and the supporting components guide the pipe jacking and machine head, so that the pipe jacking and machine head can be jacked along the supporting components, thereby reducing the phenomenon that the pipe jacking is prone to deviation.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. By setting up the guiding device, the guide rail is fixedly installed in the working pit through the connecting component. Then, the jacking pipe and the head are placed on the connecting component. The jacking pipe and the head are supported by the support component. At the same time, the jacking pipe and the head slide and cooperate with the support component along the jacking direction, so that the jacking pipe and the head can always slide along the support component during the jacking operation, thereby reducing the phenomenon that the jacking pipe is prone to deviation.

[0033] 2. By setting the reinforcing rod, when the jacking pipe and the machine head are pressed against the connecting plate, and after the jacking pipe and the machine head are pressed against the clamping plate, the reinforcing rod can be pushed to slide and press against the side wall of the working pit, thereby limiting the displacement of the guide rail in the working pit along the length direction of the reinforcing rod, thus making the installation of the guide rail in the working pit more stable. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of this application;

[0035] Figure 2 This is a structural schematic diagram showing the connection relationship between the rotating device and the guiding device;

[0036] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0037] Figure 4 yes Figure 2 A magnified view of a section at point B.

[0038] Explanation of reference numerals in the attached drawings: 1. Jacking pipe; 2. Machine head; 3. Jack; 4. Guide device; 41. Guide rail; 411. Slide groove; 412. Limiting block; 42. Support assembly; 421. Support plate; 422. Clamping plate; 43. Connecting assembly; 431. Connecting ring; 432. Embedded part; 5. Rotating device; 51. Rotating rod; 52. Rotating assembly; 521. Sliding rack; 522. Pushing rack; 523. Gear; 53. Adjusting assembly; 531. Connecting plate; 532. Extrusion block; 533. Elastic element; 534. Extrusion surface; 535. Slider; 6. Reinforcing rod; 7. Mounting hole; 8. Base plate; 9. Back plate; 10. Bracket; 11. Jacking iron. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0040] This application discloses a pipe jacking construction structure for underground engineering. (Refer to...) Figure 1 and Figure 2 The system includes a jacking pipe 1, a machine head 2, and jacks 3, all housed within a working pit. The jacking pipe 1 is a hollow cylindrical structure, and two jacks 3 are installed within the working pit. A base plate 8 is cast at the bottom of the working pit, and a bracket 10 is fixedly installed on the base plate 8. The jacks 3 are fixedly installed on the bracket 10. A back plate 9 is cast on one side wall of the working pit, and the back plate 9 is fixedly connected to the cylinder of the jacks 3. A top iron 11, which is an arc-shaped structure, is fixedly installed on the piston rod of the jacks 3. A guide device 4 is installed within the working pit to limit the movement of the jacking pipe 1 and the machine head 2 during their advancement. When jacking construction is required, first excavate the working pit, then pour the bottom plate 8 in the working pit, and pour the back plate 9 on the side wall of the working pit. Then, install the guide device 4 on the bottom plate 8, place the jacking pipe 1 and the machine head 2 on the guide device 4, and then fix the jack 3 on the support 10 through the support 10. The jacking iron 11 is installed on the jack 3. Then, start the jack 3 to jack the jacking pipe 1 and the machine head 2 for jacking construction.

[0041] Reference Figure 2 and Figure 3 The guiding device 4 includes a guide rail 41 disposed in the working pit, a support component 42 disposed on the guide rail 41 for supporting the jacking pipe 1 and the machine head 2, and a connecting component 43 disposed at one end of the guide rail 41 for connecting the guide rail 41 to the working pit. The guide rail 41 is formed by fixing together multiple transverse plates disposed along the length of the base plate 8 and longitudinal plates disposed along the width of the base plate 8.

[0042] Reference Figure 1 and Figure 2 The working pit has a jacking hole on its side wall for the machine head 2 to jack in. The working pit has a mounting hole 7 located at the jacking hole, and the diameter of the mounting hole 7 is larger than the diameter of the jacking hole. The connecting component 43 includes a connecting ring 431 fixedly installed on the guide rail 41 and a pre-embedded part 432 set on the connecting ring 431. The connecting ring 431 has a ring structure and is installed in the mounting hole 7. The pre-embedded part 432 can be directly made of pre-embedded bolts and nuts. The connecting ring 431 is fixedly connected to the working pit through the pre-embedded part 432. The inner diameter of the connecting ring 431 is adapted to the jacking pipe 1. The jacking pipe 1 and the machine head 2 slide in the connecting ring 431.

[0043] Reference Figure 2 and Figure 3The jacking pipe 1 and the machine head 2 slide in cooperation with the support assembly 42 along the jacking direction. The support assembly 42 includes a support plate 421 fixedly mounted on the guide rail 41 and multiple clamping plates 422 rotatably mounted on the guide rail 41. The support plate 421 is arranged in three sets at intervals along the length of the base plate 8. Each set includes two symmetrical support plates 421. The support plate 421 has a "door" shaped structure. The top of the support plate 421 is provided with a circle that matches the outer circumference of the jacking pipe 1. The support plate 421 is used to support the bottom of the jacking pipe 1 and the machine head 2. The clamping plate 422 is correspondingly set to the support plate 421. The clamping plate 422 is an L-shaped mechanism. The top of the clamping plate 422 is set as an arc plate structure. The top of the clamping plate 422 is adapted to the outer peripheral surface of the jacking pipe 1. The clamping plate 422 is used to clamp the jacking pipe 1 and the machine head 2. A rotating seat is installed at the bottom of the clamping plate 422. The clamping plate 422 rotates with the guide rail 41 through the rotating seat.

[0044] Reference Figure 2 and Figure 3 A rotating device 5 is provided on the guide rail 41. The rotating device 5 includes a rotating rod 51 for rotating the clamping plate 422, a rotating assembly 52 for rotating the rotating rod 51, and an adjusting assembly 53 for rotating the rotating assembly 52. Figure 4 Both ends of the rotating rod 51 are fixedly mounted with rotating seats, and one end of the rotating rod 51 is rotatably engaged with the clamping plate 422 through the rotating seats.

[0045] Reference Figure 2 and Figure 3 The rotating assembly 52 includes a sliding rack 521, a pushing rack 522, and a gear 523 that are slidably fitted onto the guide rail 41. The sliding rack 521 has a T-shaped structure, and a T-shaped sliding groove is provided on the guide rail 41. The sliding rack 521 is slidably fitted into the sliding groove. One end of the rotating rod 51 is rotatably fitted onto the sliding rack 521 through a rotating seat. The sliding rack 521 is used to drive the rotating rod 51 to rotate. The pushing rack 522 has the same structure as the sliding rack 521. The pushing rack 522 and the sliding rack 521 are spaced apart along the height direction of the working pit. The gear 523 is located between the sliding rack 521 and the pushing rack 522, and the gear 523 meshes with both the sliding rack 521 and the pushing rack 522. The guide rail 41 provides rotational support for the gear 523.

[0046] Reference Figure 2 and Figure 4 The adjusting assembly 53 includes a connecting plate 531 fixedly connected to the push rack 522, a pressing block 532 for pushing two adjacent connecting plates 531 away from each other, and an elastic member 533 for pulling two adjacent connecting plates 531 closer together. Figure 3The connecting plate 531 is an L-shaped plate, which slides along the width of the base plate 8 and is fitted onto the guide rail 41. An inclined surface is provided at one end of the connecting plate 531 near the extrusion block 532. A groove 411, which is T-shaped, is provided on the guide rail 41 along the height of the working pit. A slider 535, which slides within the groove 411, is fixedly mounted on the extrusion block 532. The extrusion block 532 slides along the height of the working pit and is fitted onto the guide rail 41. Extrusion surfaces 534, used for extruding the connecting plate 531, are provided on both sides of the extrusion block 532 near the connecting plate 531. The two extrusion surfaces 534 are inclined towards each other in a vertically downward direction. An arc-shaped plate, adapted to the outer circumference of the jacking pipe 1, is fixedly mounted at the top of the extrusion block 532.

[0047] Reference Figure 2 and Figure 4 The guide rail 41 is fixedly installed below the extrusion block 532 with a limiting block 412. The limiting block 412 has a U-shaped structure. When the extrusion block 532 is lowered to the lowest position in the vertical direction, the lower surface of the extrusion block 532 abuts against the upper surface of the limiting block 412. The elastic element 533 is inserted into the limiting block 412. The elastic element 533 can be directly a spring. One end of the elastic element 533 is fixedly connected to the connecting plate 531, and the other end is fixedly connected to another connecting plate 531.

[0048] Reference Figures 2-4 When the jacking pipe 1 and the machine head 2 are placed at the guide rail 41, the jacking pipe 1 and the machine head 2 apply force to the extrusion block 532, pushing the extrusion block 532 down. When the extrusion block 532 down, it squeezes the connecting plate 531, causing the two connecting plates 531 to slide in opposite directions and stretching the elastic element 533. When the two connecting plates 531 slide, they drive the push rack 522 to slide away from the extrusion block 532, drive the gear 523 to rotate, drive the sliding rack 521 to slide closer to the extrusion block 532, and drive the rotating rod 51 to slide and rotate at the same time. The rotating rod 51 drives the top of the clamping plate 422 to rotate closer to the jacking pipe 1. When the extrusion block 532 abuts against the limiting block 412, the clamping plate 422 clamps the jacking pipe 1, and at the same time the jacking pipe 1 abuts against the support plate 421, completing the installation of the jacking pipe 1 and the machine head 2.

[0049] Reference Figure 2 and Figure 3In order to improve the stability of the guide rail 41 in the working pit, a reinforcing rod 6 is fixedly connected to one end of the rack 522 away from the extrusion block 532. The reinforcing rod 6 is slidably fitted in the guide rail 41. When the rack 522 slides away from the extrusion block 532, it drives the reinforcing rod 6 to slide closer to the side wall of the working pit. A concrete slab can be poured on the inner wall of the working pit. After the jacking pipe 1 and the machine head 2 are pressed against the clamping plate 422, the reinforcing rod 6 is pressed against the side wall of the working pit to further reinforce the guide rail 41.

[0050] The implementation principle of a pipe jacking construction structure for underground engineering in this application embodiment is as follows: When jacking construction is required, a working pit is first excavated, a bottom plate 8 and a back plate 9 are poured, and a guide rail 41 is fixedly installed in the working pit through a connecting component 43. Then, a support 10, a jack 3, and a jacking iron 11 are installed, and the pipe jack 1 and the machine head 2 are placed at the guide rail 41. During the placement of the pipe jack 1 and the machine head 2, the pipe jack 1 and the machine head 2 are clamped by a clamping plate 422 and supported by a support plate 421. After the pipe jack 1 and the machine head 2 are installed, the jack 3 is started to push the pipe jack 1 and the machine head 2 to carry out the jacking operation.

[0051] Please refer to Figure 1 and Figure 2 This application also provides a pipe jacking construction method for underground engineering, as shown in the figure. This construction method adopts the above-mentioned structure, specifically including the following:

[0052] Working pit excavation: A working pit is excavated vertically downwards on the ground to be constructed;

[0053] Guide device 4 installation: The guide rail 41 is laid at the bottom of the working pit and installed into the working pit through the connecting component 43;

[0054] Construction structure installation: Install jack 3 onto the working pit, and place jacking pipe 1 and machine head 2 onto support assembly 42;

[0055] Pipe jacking 1: The jacking head 2 passes through the wall and enters the hole, and the jack 3 pushes the pipe jacking 1 and the jacking head 2 to the position to be jacked, so as to carry out the construction operation;

[0056] Excavation of Pipe 1: The soil generated during the jacking operation of Pipe 1 is removed;

[0057] Install subsequent pipe sections inside the well: After one pipe jack 1 is pushed in, the subsequent pipe jack 1 is placed at the guide rail 41, and the pipe jack 3 is used to continue pushing the pipe jack 1. In this way, multiple pipe jack 1 are pushed in for construction.

[0058] Head 2 recovery: After the jacking pipe 1 exits the hole, head 2 is recovered, and the joint seam inside the jacking pipe 1 is treated.

[0059] The specific implementation principle of this method has been described in detail in the above embodiments, so it will not be repeated here.

[0060] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pipe jacking construction structure for underground engineering, comprising a pipe jacking (1), a jacking head (2), and a jack (3) installed in a working pit, characterized in that: A guide device (4) is installed in the working pit. The guide device (4) includes a guide rail (41) set in the working pit, a support component (42) set on the guide rail (41) and used to support the jacking pipe (1) and the machine head (2), and a connecting component (43) set at one end of the guide rail (41) and used to connect the guide rail (41) to the working pit. The jacking pipe (1) and the machine head (2) slide in cooperation with the support component (42) along the jacking direction. The support assembly (42) includes a support plate (421) disposed on the guide rail (41) and used to support the bottom of the jacking pipe (1) and the head (2), and a plurality of clamping plates (422) rotatably fitted on the guide rail (41) and used to clamp the jacking pipe (1) and the head (2). The guide rail (41) is provided with a rotating device (5), which includes a rotating rod (51) for driving the clamping plate (422) to rotate, a rotating assembly (52) for driving the rotating rod (51) to rotate, and an adjusting assembly (53) for driving the rotating assembly (52) to rotate. The rotating assembly (52) includes a sliding rack (521), a pushing rack (522), and a gear (523) that are slidably fitted on the guide rail (41) and used to drive the rotating rod (51) to rotate. The gear (523) is located between the sliding rack (521) and the pushing rack (522), and the gear (523) meshes with both the sliding rack (521) and the pushing rack (522). The adjustment assembly (53) includes a connecting plate (531) connected to the push rack (522), a pressing block (532) for pushing two adjacent connecting plates (531) away from each other, and an elastic element (533) for pulling two adjacent connecting plates (531) closer to each other. The pressing block (532) is slidably fitted on the guide rail (41) along the height direction of the working pit. The side of the pressing block (532) near the connecting plate (531) is provided with a pressing surface (534) for pressing the connecting plate (531). The connecting plate (531) is slidably fitted on the guide rail (41). A reinforcing rod (6) is connected to the push rack (522). After the jacking pipe (1) and the machine head (2) are pressed against the clamping plate (422), the reinforcing rod (6) is pressed against the side wall of the working pit.

2. The underground engineering pipe jacking construction structure according to claim 1, characterized in that: The guide rail (41) is provided with a groove (411), and the extrusion block (532) is provided with a slider (535) that slides in the groove (411).

3. The underground engineering pipe jacking construction structure according to claim 1, characterized in that: The working pit is provided with an installation hole (7), and the connecting component (43) includes a connecting ring (431) installed on the guide rail (41) and installed in the installation hole (7) and an embedded part (432) provided on the connecting ring (431) for connecting the connecting ring (431) and the working pit.

4. The underground engineering pipe jacking construction structure according to claim 3, characterized in that: The jacking pipe (1) and the machine head (2) are slidably fitted within the connecting ring (431).

5. A method for pipe jacking construction in underground engineering, characterized in that: The underground engineering pipe jacking construction structure according to any one of claims 1-4 comprises the following: Working pit excavation: A working pit is excavated vertically downwards on the ground to be constructed; Guide device (4) laying: lay the guide rail (41) at the bottom of the working pit and install the guide rail (41) into the working pit through the connecting component (43); Construction structure installation: Install the jack (3) onto the working pit, and place the jacking pipe (1) and the machine head (2) onto the support assembly (42); Pipe jacking (1) jacking: The jack (3) pushes the pipe jacking (1) and the machine head (2) to the position to be jacked, and the construction operation is carried out.

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