A shield tunnel vertical jacking device and a construction method thereof

Abstract

The present application relates to the field of vertical jacking device, especially to a shield tunnel vertical jacking device and method, including jacking machine head and jacking device, the jacking machine head below sets up jacking device, for providing jacking machine head with driving force, the jacking device is set between jacking machine head and jacking pipe segment, for the driving force transmission of jacking device to jacking machine head, characterized in that, the jacking machine head is set between jacking device and support, the support includes upper support frame and lower support frame, the upper support frame and lower support frame are all set with support device on, for carrying jacking pipe segment, the lower support frame one side installs horizontal crossbeam, for carrying jacking pipe segment, utilizes the support device on support and crossbeam, can conveniently install and disassemble jacking pipe segment, effectively improves work efficiency.

Description

Technical Field

[0001] This invention relates to a vertical jacking device and its usage, specifically to a tunnel vertical jacking device and its construction method. Background Technology

[0002] In underground spaces, the construction of vertical shafts is essential, and their uses are very wide, such as ventilation shafts, escape shafts, and working shafts. Compared with the traditional open-cut method for constructing vertical shafts, the upward tunneling method (including vertical pipe jacking and upward tunneling shield tunneling) has the advantages of not occupying ground space and having a shorter construction time.

[0003] Traditional shaft construction often uses the open-cut method, but this method has a significant impact on the environment, surrounding traffic, and residents' lives. For the reverse shaft drilling method, the cross-section excavation requires multiple drilling operations, which has high operational requirements. In comparison, the pipe jacking method is widely used in pipeline construction because it has advantages such as being able to be constructed in busy urban areas, not requiring large-scale excavation, and not damaging roads.

[0004] Chinese Patent Publication No. CN113233368A discloses a beam-type support platform for a pipe jacking machine suitable for vertical rectangular pipe curtain construction in tunnels. It includes a detachable and assembleable frame structure, a pipe jacking machine lifting platform placed within the frame structure, a horizontal movement system for pulling the frame in the horizontal direction, and a vertical lifting system for driving the pipe jacking machine lifting platform to rise and fall. This invention is easy to construct, but this invention patent cannot meet the requirements of vertical pipe jacking.

[0005] Chinese Patent Publication No. CN114412471A discloses a test vertical pipe excavation device and its usage method, including a hydraulic jack, a model main unit, a grouting pump, and a data measurement unit. The model main unit consists of a model box, a shield tunnel model, and a vertical pipe jacking model. The grouting pump and the grouting holes are connected through grouting pipes. This method is simple to operate and has a high degree of visualization. However, this invention patent cannot meet the requirements of vertical pipe jacking construction in existing shield tunnels. Summary of the Invention

[0006] The technical problem to be solved by this invention is that it is not convenient to install and retrieve the extended jacking pipe segments during the vertical jacking process.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] First, a vertical jacking device for a shield tunnel is provided, comprising a jacking head and a jacking device. The jacking device is installed below the jacking head to provide tunneling force to the jacking head. A jacking segment is installed between the jacking device and the jacking head to transfer the tunneling force of the jacking device to the jacking head. The device is characterized in that a support is installed between the jacking head and the jacking device. The support includes an upper support frame and a lower support frame. Several support devices are installed on both the upper and lower support frames along the circumferential direction to support the jacking segment. A horizontal beam is installed on one side of the lower support frame to support the jacking segment.

[0009] Furthermore, the support device includes a fixed plate, a fixed plate is fixedly installed on the bracket, a movable plate is rotatably installed on the fixed plate, a matching pipe segment overlap block is installed on the side wall of the jacking pipe segment at the position corresponding to the movable plate, and a jacking head overlap block is installed on the side wall of the jacking head at the position corresponding to the movable plate.

[0010] Furthermore, the movable piece can rotate freely at an angle of 90°. When the movable piece is horizontal, it is in the working state and is used to support the pipe segment overlap block. When the movable piece is vertical, it is in the retracted state.

[0011] Furthermore, the pipe jacking head includes a cutterhead for tunneling, and a grouting pipe is installed inside the pipe jacking head, which passes through the side wall of the pipe jacking head for spraying concrete outward.

[0012] Furthermore, several machine head jacks are arranged inside the jacking machine head along the circumferential direction, and the movable end of the machine head jacks contacts the end face of the jacking pipe segment.

[0013] Furthermore, the diameter of the jacking machine head is larger than the diameter of the jacking segment.

[0014] Furthermore, the jacking head is internally connected to a slag discharge pipe and a cooling pipe. Both the slag discharge pipe and the cooling pipe are equipped with splicing pipes in the middle to extend or shorten their effective length. The slag discharge pipe is externally connected to a slag storage bucket, which is transported by a trolley. The cooling pipe is externally connected to an electric blower.

[0015] Furthermore, the jacking device includes a jacking jack, the movable end of which contacts the end of the jacking pipe segment.

[0016] Furthermore, a beam frame system is provided on one side of the support, which is used to transport the jacking pipe segments.

[0017] A construction method for a vertical jacking device for a shield tunnel includes the following steps:

[0018] S1: Install the beam frame system and assemble the support frame at the tunneling location;

[0019] S2: The jacking machine head is supported by the movable plate on the upper support frame in conjunction with the overlapping block of the machine head;

[0020] S3: The jacking jack pushes the pipe jacking machine head to excavate to the depth of one pipe segment;

[0021] S4: Retract the jack and remove the splicing pipe;

[0022] S5: Insert a new jacking segment between the jacking machine head and the jacking jack;

[0023] S6: Install splicing pipes to extend the length of slag discharge pipes and cooling pipes;

[0024] S7: Repeat S3 to S6 until the excavation is complete;

[0025] S8: The jacking jack retracts, and the grouting pipe begins operation;

[0026] S9: As the jacking machine head moves downward, the jacking segments are retrieved sequentially.

[0027] The present invention has the following beneficial effects:

[0028] First, by setting up a support frame, it is possible to quickly position and easily install the pipe during the excavation process, and it is also convenient to add pipe jacking segments, which effectively improves work efficiency.

[0029] Second, by setting up a bracket, disassembly and reassembly can be integrated. This makes it easy to add and remove the jacking segments, allowing them to be reused and effectively reducing operating costs.

[0030] Third, the installation of supports allows for construction to be carried out inside the tunnel without occupying ground space, thus facilitating travel.

[0031] Fourth, after the shaft excavation is completed, a grouting pipe is installed on the jacking machine head. During the early jacking machine head recovery process, shotcrete is sprayed to reinforce the shaft structure, ensuring safety and improving construction results. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0034] Figure 2This is a structural diagram of the pipe jacking head in this embodiment;

[0035] Figure 3 This is a schematic diagram of the support structure in this embodiment;

[0036] Figure 4 This is a diagram showing the usage state of the support device in this embodiment;

[0037] Figure 5 This is a schematic diagram of the support device in its retracted state according to this embodiment. Detailed Implementation

[0038] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0040] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] This invention provides a vertical jacking device for shield tunnels, such as... Figure 1As shown, the device includes a pipe jacking head 4 and a jacking jack 19. The jacking jack 19 extends to push the pipe jacking head 4 for tunneling. The tunneling depth of the pipe jacking head 4 is increased by adding pipe jacking segments 16 between the jacking jack 19 and the pipe jacking head 4. The pipe jacking head 4 is connected to a muck discharge pipe 9 and a cooling pipe 8. An electric blower 13 is connected to the outer end of the cooling pipe 8. When the electric blower 13 operates, it blows air into the pipe jacking head 4 to cool it. At the same time, it can also discharge the soil residue generated by the pipe jacking head 4 during the tunneling process through the muck discharge pipe 9. A muck storage bucket 14 is connected to the outer end of the muck discharge pipe 9 to hold the soil residue. The muck storage bucket 14 is transported by a trolley 1.

[0043] like Figure 1 As shown, to facilitate the addition of a jacking segment 16 between the jacking head 4 and the jacking jack 19, a splicing pipe 3 is installed in the middle of both the slag discharge pipe 9 and the cooling pipe 8. When it is necessary to add a jacking segment 16, the slag discharge pipe 9 and the cooling pipe 8 are removed from the splicing pipe 3. Then, the jacking segment 16 to be added is placed between the jacking head 4 and the jacking jack 19. After the splicing pipe 3 is installed, the ports of the slag discharge pipe 9 and the cooling pipe 8 are installed on the newly added splicing pipe 3. Then, the jacking jack 19 is extended so that the jacking head 4 can continue to excavate.

[0044] like Figure 2 As shown, a cutterhead 7 is installed on the top of the pipe jacking head 4 for tunneling. A head jack 12 is installed inside the pipe jacking head 4, with its end contacting the end face of the pipe jacking segment 16. During tunneling, the head jack 12 can sometimes be extended to increase the tunneling speed. During tunneling, the head jack 4 may deviate. To facilitate correction of the tunneling direction, the head jacks 12 are distributed circumferentially. The extension of the corresponding head jacks 12 allows for small-range adjustments to the tunneling direction, ensuring the quality of the excavated shaft. Furthermore, the diameter of the pipe jacking head 4 is larger than the diameter of the pipe jacking segment 16, reducing friction between the pipe jacking segment 16 and the shaft, ensuring smooth movement of the pipe jacking segment 16.

[0045] like Figure 1 and Figure 3 As shown, a support 5 is set between the pipe jacking machine head 4 and the jacking jack 19. The support 5 is divided into an upper support frame 51 and a lower support frame 52. Multiple movable pieces 62 are set along the circumferential direction on both the upper support frame 51 and the lower support frame 52. The movable pieces 62 are used to support the pipe jacking segments 16, making it convenient to add and remove the pipe jacking segments 16. A crossbeam 20 is also connected to one side of the lower support frame 52. The crossbeam 20 is used to support the pipe jacking segments 16.

[0046] Specifically, in this embodiment, when it is necessary to add a jacking segment 16, the jacking segment 16 to be added is first placed on the crossbeam 20. Then, the jacking segment 16 is moved along the crossbeam 20 to the lower support frame 52. In order to facilitate the movement of the jacking segment 16 on the crossbeam 20, rollers can be installed on the jacking segment 16 at the position corresponding to the crossbeam 20. This facilitates the movement of the jacking segment 16 on the crossbeam 20 and also allows the jacking jack 19 to lift the end face of the jacking segment 16. The movable piece 62 on the lower support frame 52 is used to support the jacking segment 16. Then, the jacking jack 19 is used to lift the jacking segment 16 to push the jacking machine head 4 to excavate.

[0047] like Figure 4 and Figure 5 As shown, fixed plates 61 are fixedly installed at the positions corresponding to movable plates 62 on the support 5. Movable plates 62 are rotatably installed on the fixed plates 61. The rotation angle of the movable plates 62 is 90°, including horizontal and vertical states. When the movable plates 62 are in a horizontal state, they can be used to support the jacking pipe segments 16. When the movable plates 62 are in a vertical state, the jacking pipe segments 16 can pass smoothly. Pipe segment overlap blocks 17 are installed at the positions corresponding to the movable plates 62 on the jacking pipe segments 16. The movable plates 62 are used to support the pipe segment overlap blocks 17 to support the jacking pipe segments 16. During the tunneling process, in order to facilitate the start of tunneling, machine head overlap blocks 41 are installed on the side of the jacking machine head 4 at the positions corresponding to the movable plates 62. The movable plates 62 located on the upper support section 51 support the machine head overlap blocks 42 to ensure that tunneling can start smoothly.

[0048] like Figure 1 As shown, in order to facilitate the handling of the jacking pipe segment 16, a beam frame system 2 is installed on one side of the support 5. The beam frame system 2 is used to suspend the jacking pipe segment 16.

[0049] like Figure 2 As shown, a grouting pipe 10 is installed inside the pipe jacking head 4. The grouting pipe 10 passes through the side wall of the pipe jacking head 4. The grouting pipe 10 is used to spray concrete to reinforce the excavated shaft during the downward movement of the pipe jacking head 4.

[0050] The present invention also provides a construction method for a vertical jacking device for a shield tunnel, the steps of which are as follows:

[0051] S1: Install the beam frame system 2 and splice the support 5 at the tunneling location;

[0052] S2: The movable piece 62 on the upper support frame 51 is used in conjunction with the machine head overlap block 41 to support the pipe jacking machine head 4;

[0053] S3: The jacking jack 19 extends to push the pipe jacking head 4 to first excavate to the depth of one pipe jacking segment 16;

[0054] S4: Push in jack 19 to retract and remove splicing pipe 3;

[0055] S5: Insert a new jacking segment 16 between the jacking machine head 4 and the jacking jack 19;

[0056] S6: Install splicing pipe 3 to extend the length of slag discharge pipe 9 and cooling pipe 8;

[0057] S7: Repeat S3 to S6 until the excavation is complete;

[0058] S8: When the jacking jack 19 retracts, the pipe jacking machine head 4 will descend, and the grouting pipe 10 will start working;

[0059] S9: As the jacking machine head 4 moves downward, the jacking segments 16 are retrieved in sequence.

[0060] Specifically, in this embodiment, during step S8, as the jacking jack 19 retracts, the grouting pipe 10 sprays concrete outward to reinforce the excavated shaft.

[0061] In step S9, when recovering the jacking segment 16, the lowest jacking segment 16 is first supported by the movable plate 62 on the upper support frame 51. Then, the movable plate 62 on the upper support frame 51 is rotated to a vertical position. At this time, when the jacking jack 19 is recovering, the lowest jacking segment 16 will also move downwards until the lowest jacking segment 16 moves to the movable plate 62 on the lower support frame 52. The movable plate 62 on the upper support frame 51 is then rotated in the opposite direction to a horizontal position to support the second to last jacking segment 16. At this time, the lowest jacking segment 16 can be moved away using the crossbeam 20. The process is repeated in sequence to recover all the jacking segments 16, thus ensuring the completion of the entire project.

[0062] It should be understood that the above description of specific embodiments of the present invention is only for illustrating the technical approach and features of the present invention, and is intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the present invention is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of the present invention should be covered within the protection scope of the present invention.

Claims

1. A shield tunnel vertical jacking device, the device comprising a jacking head (4) and a jacking device, the jacking device being arranged below the jacking head (4) for providing a jacking force to the jacking head (4), a shield segment (16) being arranged between the jacking head (4) and the jacking device for transmitting the jacking force of the jacking device to the jacking head (4), characterized in that a support frame (5) is arranged between the jacking head (4) and the jacking device, the support frame (5) comprising an upper support frame (51) and a lower support frame (52), a plurality of support devices (6) being mounted on the upper support frame (51) and the lower support frame (52) in a circumferential direction, each support device (6) comprising a fixed plate (61) and a movable plate (62) rotatably mounted on the fixed plate (61), the movable plate (62) being freely rotatable by 90° and supporting the shield segment (16) in a horizontal state and being disengaged from the shield segment in a vertical state; a horizontal beam (20) being mounted on one side of the lower support frame (52) for supporting the shield segment (16), and the shield segment (16) being movable along the horizontal beam (20) when the movable plate (62) is in the vertical state. A corresponding segment overlap block (17) is mounted on the side wall of the shield segment (16) corresponding to the position of the movable plate (62), and a head overlap block (41) is mounted on the side wall of the jacking head (4) corresponding to the position of the movable plate (62).

2. The shield tunnel vertical jacking device according to claim 1, characterized in that, The freely rotatable angle of the movable plate (62) is 90°, the movable plate (62) is in a working state when it is horizontal, and the movable plate (62) is in a retracted state when it is vertical.

3. The shield tunneling jacking device of claim 2, wherein, The jacking head (4) comprises a cutter head (7) for tunneling, a grouting pipe (10) is arranged in the jacking head (4), and the grouting pipe (10) penetrates through the side wall of the jacking head (4) for spraying concrete outward.

4. The shield tunneling jacking device of claim 1, wherein, A plurality of head jacks (12) are arranged inside the jacking head (4) in a circumferential direction, and the movable end of the head jacks (12) is in contact with the end face of the shield segment (16).

5. The shield tunneling jacking device of claim 1, wherein, The diameter of the jacking head (4) is greater than the diameter of the shield segment (16).

6. The shield tunneling jacking device of claim 1, wherein, A slag discharge pipe (9) and a cooling pipe (8) are arranged inside the jacking head (4), a spliced pipe (3) is mounted on the middle part of the slag discharge pipe (9) and the cooling pipe (8) for extending or shortening the effective length thereof, a slag storage bucket (14) is connected to the slag discharge pipe (9), the slag storage bucket (14) is transported by a trolley (1), and an electric hair dryer (13) is connected to the cooling pipe (8).

7. The shield tunneling jacking device of claim 1, wherein, The jacking device comprises a jacking jack (19), and the movable end of the jacking jack (19) is in contact with the end of the shield segment (16).

8. The shield tunneling jacking device of claim 1, wherein, A beam frame system (2) is arranged on one side of the support frame (5), and the beam frame system (2) is used for carrying the shield segment (16).

9. The shield tunneling jacking device of claim 1, wherein, The method comprises the following steps:

10. A construction method based on the shield tunnel vertical jacking device according to any one of claims 1 to 9, characterized in that, S1: installing the beam frame system (2) and splicing the support frame (5) at the tunneling position; S2: using the movable plate (62) on the upper support frame (51) to be in a horizontal state, and cooperating with the head overlap block (41) to support the jacking head (4); ​ S3: Jack (19) pushes the pipe jacking head (4) to excavate a pipe segment (16) to a certain depth; S4: Jack (19) retracts, and the splicing pipe (3) is removed; S5: A new pipe segment (16) is placed between the pipe jacking head (4) and the jack (19); S6: The splicing pipe (3) is installed to extend the length of the slag pipe (9) and the cooling pipe (8); S7: Repeat S3-S6 until the excavation is completed; S8: Jack (19) retracts, and grouting pipe (10) works; S9: When the pipe jacking head (4) moves downward, the movable piece (62) is rotated to the vertical state in sequence, and the recovered pipe segment (16) is removed through the horizontal beam (20).

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