Construction method of pipe jacking machine, receiving tunnel, tunnel group and inter-tunnel communication passage

Abstract

The application discloses a pipe jacking machine, a receiving tunnel, a tunnel group and a construction method of a tunnel intercommunication passage. The construction method of the tunnel intercommunication passage comprises the following steps: making the pipe jacking machine head be in a working position, being pulled out from a starting hole and being jacked towards a receiving hole; when the pipe jacking machine head is jacked to be close to the receiving hole, making an inner machine of the pipe jacking machine head be in an unlocking position; a front end of a machine shell of the pipe jacking machine head is jacked forward and inserted into a ring groove between the receiving hole and a receiving hole door; and the inner machine in the machine shell is received. The scheme can quickly establish a connection passage through the pipe jacking machine, and has higher efficiency compared with a manual excavation mode of reinforcing soil bodies. Compared with a traditional pipe jacking machine construction scheme, the scheme makes the front end of the machine shell be jacked into the ring groove, then dismounts the inner machine in the machine shell, at this time, the machine shell becomes a part of the tunnel itself, so that materials are saved, and the recovery difficulty of the pipe jacking machine is reduced. The construction efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of tunnel engineering, and in particular to a construction method for a pipe jacking machine, a receiving tunnel, a tunnel assembly, and connecting passages between tunnels. Background Technology

[0002] According to relevant requirements for fire evacuation in my country, appropriate connecting passages need to be built between long-distance parallel two-way tunnels to meet the needs of rapid evacuation of personnel in case of tunnel emergencies.

[0003] Currently, connecting passages between tunnels typically employ methods such as freezing, soil stabilization, and anchoring to enhance the strength and impermeability of the soil in the connecting passage area before excavation. Since the connecting passage is located inside the tunnel and underground passage construction is carried out, it can be considered "secondary tunnel construction," thus posing significant construction risks. Furthermore, its construction conditions are severely constrained, the construction environment is harsh, and the construction difficulty is greatly increased. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art, such as high construction difficulty, harsh construction conditions and high risk, and to provide a construction method for a pipe jacking machine, a receiving tunnel, a tunnel group and an inter-tunnel connecting passage.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A pipe jacking machine includes a pipe jacking head, the pipe jacking head including a housing and an inner unit disposed in the housing, the inner unit being movable relative to the housing between a working position and an unlocked position, wherein, in the working position, the inner unit is fixed to the housing and the front end of the inner unit extends beyond the front end of the housing, and in the unlocked position, the front end of the housing extends beyond the front end of the inner unit.

[0007] This pipe jacking machine can be used to create a connecting passage between two parallel tunnels.

[0008] Preferably, the inner unit is detachably connected to the casing by bolts, and the inner unit can move relative to the casing after the bolts are removed. Alternatively, the casing is provided with an axial guide rail, and the inner unit can slide along the axial guide rail. The inner unit can be fixed relative to the casing by a limiting block provided on the axial guide rail.

[0009] The above structure allows the indoor unit to switch between working and unlocked states.

[0010] Preferably, the inner machine comprises a cutter head, the cutter head being switchable between a cutting state and a folded state, the outer diameter of the cutter head being greater than the inner diameter of the machine shell in the cutting state and being less than or equal to the inner diameter of the machine shell in the folded state, the cutter head corresponding to the cutting state when the inner machine is in the working position, and the cutter head corresponding to the folded state when the inner machine is in the unlocking position.

[0011] The outer diameter of the cutter head being greater than the inner diameter of the machine shell in the cutting state can cut a larger diameter tunnel, and on the other hand, the axial projection of the cutter head can completely block the machine shell, avoiding the soil generated by the cutter head from flowing into the machine shell, and ensuring the normal operation of the cutting work. The outer diameter of the cutter head being less than or equal to the inner diameter of the machine shell in the folded state can ensure that the inner machine is not hindered to retract into the machine shell.

[0012] Preferably, the cutter head comprises a disc body and a cutter arm movably connected to the outer edge of the disc body, the cutter arm being connected to a driving device, and the cutter arm being movable towards the center of the disc body under the driving of the driving device until the axial projection of the cutter arm falls completely within the outer contour of the cutter head.

[0013] Preferably, the receiving tunnel is provided with a receiving opening and a receiving door, a gap is left between the outer wall of the receiving door and the inner wall of the receiving opening to form a ring groove, and the ring groove is used for inserting the front end of the machine shell of the pipe jacking machine as described above.

[0014] Thus, the connecting channel jacked out by the pipe jacking machine can be connected with the receiving tunnel.

[0015] Preferably, the ring groove is closed near the inner side of the receiving tunnel.

[0016] Thus, the requirement of connecting with the machine shell can be met while avoiding the underground water from seeping into the receiving tunnel from the ring groove. The waterproof requirement of the receiving tunnel is met.

[0017] The application also provides a tunnel group, which comprises a starting tunnel and a receiving tunnel as described above, the starting tunnel being parallel to the receiving tunnel, and the starting tunnel being provided with a starting opening arranged opposite to the receiving opening of the receiving tunnel. The pipe jacking machine can pass out of the starting opening and pass through the soil to enter the receiving opening, so as to connect the starting tunnel and the receiving tunnel.

[0018] Preferably, the starting opening is provided with a starting door, the starting door being openable and closable to expose or close the starting opening. The starting door can be used for waterproofing and seepage prevention during the early preparation work.

[0019] The application also provides a construction method of a connecting channel between tunnels, which is suitable for the pipe jacking machine as described above and the tunnel group as described above, and comprises the following steps:

[0020] S10. The pipe jacking machine head is in the working position, and is pushed out from the starting hole and towards the receiving hole;

[0021] S20. When the pipe jacking machine head is pushed close to the receiving hole, the inner machine of the pipe jacking machine head is in the unlocked position;

[0022] S30. The front end of the machine shell of the pipe jacking machine head is pushed forward and inserted into the annular groove between the receiving hole and the receiving portal;

[0023] S40. The inner machine is received in the machine shell.

[0024] The scheme can quickly establish a connecting channel between two tunnel groups by using the pipe jacking machine, and has higher efficiency compared with the existing manual excavation method of reinforced soil.

[0025] Compared with the traditional pipe jacking machine construction scheme, the front end of the machine shell is pushed into the annular groove, and then the inner machine in the machine shell is disassembled, at this time the machine shell becomes part of the tunnel itself, which not only saves materials, but also reduces the difficulty of recycling the pipe jacking machine. While improving the construction efficiency, the cost is reduced.

[0026] Preferably, step S30 further comprises: after the front end of the machine shell is inserted into the annular groove, grouting is performed to block the gap between the machine shell and the receiving hole.

[0027] Preferably, the step S40 comprises:

[0028] The receiving portal is disassembled;

[0029] The inner machine is moved from the receiving hole into the receiving tunnel for receiving.

[0030] The positive progress effect of the present application is that:

[0031] The scheme can quickly establish a connecting channel between two tunnel groups by using the pipe jacking machine, and has higher efficiency compared with the existing manual excavation method of reinforced soil.

[0032] Compared with the traditional pipe jacking machine construction scheme, the front end of the machine shell is pushed into the annular groove, and then the inner machine in the machine shell is disassembled, at this time the machine shell becomes part of the tunnel itself, which not only saves materials, but also reduces the difficulty of recycling the pipe jacking machine. While improving the construction efficiency, the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a top view of the tunnel group;

[0034] Figure 2 is a schematic view of the pipe jacking machine in the initial state in the tunnel group;

[0035] Figure 3Fig. 6 is a schematic view of the tunneling machine head 100 in a locked position 140;

[0036] Figure 4 Fig. 7 is a schematic view of the tunneling machine head 100 in an unlocked position 140;

[0037] Figure 5 Fig. 8 is a schematic view of the tunneling machine head 100 in a locked position 140;

[0038] Figure 6 Fig. 9 is a schematic view of the tunneling machine head 100 in an unlocked position 140;

[0039] Figure 7 Fig. 10 is a front view of the cutter head 121;

[0040] Figure 8 Fig. 11 is a schematic view of the tunneling machine head 100 in an unlocked position 140;

[0041] Figure 9 Fig. 12 is a schematic view of the tunneling machine head 100 in a locked position 140;

[0042] Figure 10 Fig. 13 is a schematic view of the tunneling machine head 100 in an unlocked position 140;

[0043] Figure 11 Fig. 14 is a schematic view of the tunneling machine head 100 in a locked position 140;

[0044] Figure 12 Fig. 15 is a flow chart of the tunneling method;

[0045] BRIEF DESCRIPTION OF THE DRAWINGS

[0046] tunneling machine head 100

[0047] machine housing 110

[0048] inner machine 120

[0049] cutter head 121

[0050] cutter body 122

[0051] cutter arm 123

[0052] working position 130

[0053] locked position 140

[0054] receiving tunnel 200

[0055] receiving opening 210

[0056] receiving portal 220

[0057] pulling device 222

[0058] receiving pipe section 230

[0059] ring groove 240

[0060] jack 250

[0061] origin tunnel 300

[0062] origin opening 310

[0063] origin pipe section 320

[0064] origin portal 330

[0065] gate plate 331 DETAILED DESCRIPTION

[0066] The present application will be further described by way of example only with reference to the accompanying drawings.

[0067] In combination Figure 2 The present application provides a pipe jacking machine, which comprises a pipe jacking machine head 100, the pipe jacking machine head 100 comprising a machine shell 110 and an inner machine 120 arranged in the machine shell 110. The inner machine 120 referred to herein is a module composed of a cutter head 121 for cutting soil and a power mechanism for driving the cutter head 121.

[0068] In combination Figure 4 And Figure 8 The inner machine 120 is movable relative to the machine shell 110 between a working position 130 and an unlocking position 140. The working position 130 referred to herein is the position of the inner machine 120 when it is cutting soil and moving forward. When the inner machine 120 is in the working position 130, it is fixed with the machine shell 110, and the front end of the inner machine 120 is beyond the front end of the machine shell 110.

[0069] When the inner machine 120 is in the unlocking position 140, the front end of the machine shell 110 is beyond the front end of the inner machine 120, so that the machine shell 110 can be inserted into the annular groove 240 at the receiving opening 210 in the subsequent operation without being hindered by the inner machine 120. It needs to be further explained that when the inner machine 120 is in the unlocking position 140, it can be in a state of being movable relative to the machine shell 110, or in a state of being fixed relative to the machine shell 110. In the present application, the inner machine 120 is movable relative to the machine shell 110 when it is in the unlocking position 140.

[0070] The pipe jacking machine can be used to punch a connecting channel in two parallel tunnels.

[0071] In the present embodiment, the inner machine 120 is detachably connected with the machine shell 110 by bolts. The inner machine 120 is fixed with the machine shell 110 by bolt connection, and the inner machine 120 is movable relative to the machine shell 110 by removing the bolts, so as to realize the switching of the inner machine 120 between the working state and the unlocking state.

[0072] In addition, the switching between the working state and the unlocking state of the inner machine 120 can also be realized by the following alternative solution: the shell 110 is provided with an axial guide rail, the inner machine 120 can move along the axial guide rail, and the inner machine 120 can be relatively fixed with the shell 110 by a limiting block provided on the axial guide rail. When the inner machine 120 is in the working state, the limiting block limits the movement of the inner machine 120 relative to the shell 110, and when the inner machine 120 is in the unlocking state, the limiting block is removed, and at this time, the inner machine 120 can freely slide relative to the shell 110.

[0073] In combination with Figure 7 , Figure 8 and Figure 9 , in the present embodiment, the inner machine 120 comprises a cutter head 121 for cutting the soil body, and the cutter head 121 can be switched between a cutting state and a folded state. The outer diameter of the cutter head 121 is greater than the inner diameter of the shell 110 when in the cutting state, and is less than or equal to the inner diameter of the shell 110 when in the folded state.

[0074] The outer diameter of the cutter head 121 is greater than the inner diameter of the shell 110 in the cutting state, which can cut a larger diameter tunnel on the one hand, and on the other hand, the axial projection of the cutter head 121 can completely block the shell 110, avoiding the soil generated by the cutting of the cutter head 121 from flowing into the shell 110, and ensuring the normal progress of the cutting work. The outer diameter of the cutter head 121 is less than or equal to the inner diameter of the shell 110 in the folded state, which can ensure that the inner machine 120 is not hindered to retract into the shell 110.

[0075] The cutter head 121 realizes switching between the folded state and the cutting state through the following structure. The cutter head 121 comprises a disc body 122 and a cutter arm 123 movably connected to the outer edge of the disc body 122. The cutter arm 123 is connected with a driving device, and the cutter arm 123 can move towards the center of the disc body 122 under the driving of the driving device until the axial projection of the cutter arm 123 completely falls within the outer contour of the cutter head 121.

[0076] Specifically, in the present embodiment, the driving device is a plurality of hydraulic cylinders, one end of each hydraulic cylinder is connected with the cutter arm 123, and the other end is connected with the center of the disc body 122. The hydraulic cylinders are retracted to drive the cutter arm 123 to fold towards the center of the disc body 122.

[0077] Of course, the driving device is not limited to the above solution. In other alternative solutions, the driving device can be a motor provided at the hinge of the cutter arm 123, which is used to drive the cutter arm 123 to rotate relative to the disc body 122. The rotation of the motor drives the cutter arm 123 to fold towards the center of the disc body 122 to switch to the folded state. The driving device can also be a telescopic cylinder connected with the cutter arm 123 and the disc body 122, which drives the cutter arm 123 to extend and retract relative to the disc body 122 to switch to the folded state.

[0078] In combination with Figure 1 and Figure 3The application further provides a receiving tunnel 200, which is provided with a receiving hole 210 and a receiving hole door 220 arranged in the receiving hole 210, a gap is left between the receiving hole door 220 and the inner wall of the receiving hole 210 to form a ring groove 240, and the front end of the casing 110 of the pipe jacking machine described above can be inserted into the ring groove 240. Thus, the connecting channel jacked out by the pipe jacking machine can be connected with the receiving tunnel 200.

[0079] In the embodiment, the ring groove 240 is closed near the inner side of the receiving tunnel 200, so that the groundwater can be prevented from seeping into the receiving tunnel 200 from the ring groove 240 while meeting the requirement of being connected with the casing 110. The waterproof requirement of the receiving tunnel 200 is met.

[0080] Specifically, the one-side closed ring groove 240 is realized by the following structure: the receiving hole door 220 includes a main body part with a smaller inner diameter than the receiving hole 210 and a flange arranged on the outer peripheral wall of the main body part, and the width of the flange is consistent with the difference between the inner diameter of the main body part and the receiving hole 210. The flange is arranged at the inner side edge of the outer peripheral wall of the main body part and blocks the gap between the receiving hole door 220 and the receiving hole 210. Alternatively, the one-side closed ring groove 240 can also be realized by the following structure: a flange is arranged on the inner peripheral wall of the receiving hole 210, and the flange blocks the gap between the receiving hole door 220 and the receiving hole 210.

[0081] The application further provides a tunnel set, which includes a starting tunnel 300 and the receiving tunnel 200 described above, the starting tunnel 300 is parallel to the receiving tunnel 200, and the starting tunnel 300 is provided with a starting hole 310 arranged opposite to the receiving hole 210 of the receiving tunnel 200. The pipe jacking machine can pass out of the starting hole 310 and pass through the soil to enter the receiving hole 210, so that the connecting channel connecting the starting tunnel 300 and the receiving tunnel 200 is formed.

[0082] Specifically, in the embodiment, the starting tunnel 300 includes a starting pipe section 320, the receiving tunnel 200 includes a receiving pipe section 230, the starting pipe section 320 and the receiving pipe section 230 are arranged correspondingly, the starting hole 310 is arranged on the starting pipe section 320, and the receiving hole 210 is arranged on the receiving pipe section 230. In this way, the structure is modularized, and the construction is more convenient.

[0083] In combination with Figure 4 , Figure 5 and Figure 6 , in the embodiment, the starting hole 310 is provided with a starting hole door 330. The starting hole door 330 can be opened and closed to expose or close the starting hole 310, and the starting hole door 330 can be used for waterproofing and seepage prevention during the preliminary preparation work.

[0084] Specifically, the starting portal 330 includes two gate plates 331 and a pulling device 222 for controlling the opening of the gate plates 331, and the two gate plates 331 are connected with the pulling device 222 located in the starting pipe section 320. The pulling device 222 can be a winch or a telescopic rod, and the pulling device 222 is connected with the gate plates 331 through a cable, so as to pull the gate plates 331 until the starting opening 310 is exposed.

[0085] Preferably, each gate plate 331 is spliced by two split components, when the starting portal 330 is opened, the gate plates 331 are pulled first until the normal projection of one of the split components completely falls on the starting pipe section 320, then the split component whose normal projection falls on the starting pipe section 320 is removed, the cable is connected with the other split component, and the other split component is pulled until its normal projection completely falls on the starting pipe section 320, at this time, the starting opening 310 is completely exposed, and the pipe jacking machine can pass out of the starting opening 310 to carry out tunneling work.

[0086] The split-spliced gate plate 331 can reduce the space occupation after the gate plate 331 is pulled into the starting pipe section 320, and improve the space utilization rate. Moreover, the equipment layout of the starting portal 330 can be more compact.

[0087] As shown in Figure 12 The application further provides a tunnel interconnection passage construction method for establishing a connecting passage between the tunnel groups by using the pipe jacking machine.

[0088] S10. The pipe jacking machine head 100 is in the working position 130, and passes out of the starting opening 310 and jacks in the direction of the receiving opening 210;

[0089] S20. When the pipe jacking machine head 100 jacks to be close to the receiving opening 210, the inner machine 120 of the pipe jacking machine head 100 is in the unlocking position 140;

[0090] S30. The front end of the machine shell 110 of the pipe jacking machine head 100 jacks forward and is inserted into the annular groove 240 between the receiving opening 210 and the receiving portal 220;

[0091] S40. The inner machine 120 located in the machine shell 110 is received.

[0092] The scheme can quickly establish a connecting passage between two tunnel groups by using the pipe jacking machine, and has higher efficiency compared with the existing manual excavation method of reinforcing the soil body.

[0093] Compared to traditional pipe jacking machine construction methods, this method involves inserting the front end of the casing 110 into the annular groove 240, followed by disassembling the inner unit 120 within the casing 110. At this point, the casing 110 becomes part of the tunnel itself, saving materials and reducing the difficulty of recycling the pipe jacking machine. This improves construction efficiency while reducing costs.

[0094] In this embodiment, the step of placing the inner unit 120 of the pipe jacking machine head 100 in the unlocked position 140 specifically includes:

[0095] Release the lock between the indoor unit 120 and the jacking pipe;

[0096] The cutter head 121 of the indoor unit 120 is moved to the folded state;

[0097] Install jacks 250, which are connected to the indoor unit 120, in the pipe section at the rear of the pipe jacking machine;

[0098] Jack 250 pulls the indoor unit 120 back until the front end of the jacking pipe exceeds the front end of the indoor unit 120.

[0099] This structure improves the precision and convenience of operation.

[0100] Combination Figure 10 and Figure 11 In this embodiment, step S30 further includes: after inserting the annular groove 240 into the front end of the housing 110, grouting to seal the gap between the housing 110 and the receiving opening 210. This prevents leakage in the tunnel. Specifically, the grouting step includes embedding a grouting pipe in the receiving pipe section 230, with one end of the grouting pipe protruding from the inner wall of the receiving opening 220, and the other end extending into the receiving pipe section 230 and connected to the grouting machine in the receiving pipe section 230. The grouting machine grouts to seal the gap between the housing 110 and the receiving opening 210.

[0101] In this embodiment, step S40 includes: disassembling the receiving door 220; moving the indoor unit 120 from the receiving opening 210 into the receiving tunnel 200 for receiving. This achieves the connection of the channel.

[0102] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A tunnel group, characterized by: The tunnel group comprises a sending tunnel and a receiving tunnel, the sending tunnel is parallel to the receiving tunnel, and a connection channel is established between the sending tunnel and the receiving tunnel by a pipe jacking machine; The sending tunnel is provided with a sending opening which is arranged opposite to a receiving opening of the receiving tunnel, the pipe jacking machine can pass out of the sending opening and pass through the soil to enter the receiving opening, thereby connecting the connection channel of the sending tunnel and the receiving tunnel; The receiving tunnel is provided with a receiving opening and a receiving door, a gap is left between the outer wall of the receiving door and the inner wall of the receiving opening to form a ring groove, and the ring groove is used for inserting the front end of the shell of the pipe jacking machine; The ring groove is closed at one end near the inner side of the receiving tunnel, the receiving door comprises a main body part with a smaller inner diameter than the receiving opening and a convex edge arranged on the outer peripheral wall of the main body part, the width of the convex edge is consistent with the difference between the inner diameter of the main body part and the receiving opening, the convex edge is arranged at the inner side edge of the outer peripheral wall of the main body part and blocks the gap between the receiving door and the receiving opening; The pipe jacking machine comprises a pipe jacking machine head, the pipe jacking machine head comprises a shell and an inner machine arranged in the shell, the inner machine can move relative to the shell between a working position and an unlocking position, wherein, in the working position, the inner machine is fixed with the shell, and the front end of the inner machine exceeds the front end of the shell, in the unlocking position, the front end of the shell exceeds the front end of the inner machine, so that the shell can be inserted into the ring groove of the receiving opening without being hindered by the inner machine in subsequent operations; The inner machine comprises a cutter head, the cutter head can be switched between a cutting state and a folded state, the outer diameter of the cutter head in the cutting state is greater than the inner diameter of the shell, and the outer diameter of the cutter head in the folded state is less than or equal to the inner diameter of the shell, when the inner machine is in the working position, the cutter head corresponds to the cutting state, and when the inner machine is in the unlocking position, the cutter head corresponds to the folded state.

2. The tunnel set of claim 1, wherein: The sending opening is provided with a sending door which can be opened and closed to expose or close the sending opening.

3. The tunnel set of claim 1, wherein: The inner machine and the shell are detachably connected by bolts, the inner machine can move relative to the shell after the bolts are removed, or the shell is provided with an axial guide rail, the inner machine can slide along the axial guide rail, and the inner machine can be fixed relative to the shell by a limiting block arranged on the axial guide rail.

4. The tunnel set of claim 1, wherein: The cutter head comprises a disc body and a cutter arm movably connected to the outer edge of the disc body, the cutter arm is connected with a driving device, and the cutter arm can move towards the center of the disc body under the driving of the driving device until the axial projection of the cutter arm completely falls within the outer contour of the cutter head.

5. A method of constructing a cross-tunnel passage, suitable for a tunnel group as claimed in any one of claims 1 to 4, characterized in that, The method comprises the following steps: S10. The pipe jacking machine head of the pipe jacking machine is in the working position, passes out of the sending opening, and advances towards the receiving opening; S20. When the pipe jacking machine head advances to near the receiving opening, the inner machine of the pipe jacking machine head is in the unlocking position; S30. The front end of the shell of the pipe jacking machine head advances and is inserted into the ring groove between the receiving opening and the receiving door; S40. The inner machine in the shell is received.

6. The method of claim 5, wherein the tunnel is formed by a tunneling machine. Step S30 further comprises: after the front end of the shell is inserted into the ring groove, grouting is performed to block the gap between the shell and the receiving opening.

7. The method of claim 6, wherein the tunnel is formed by a tunneling machine. Step S40 comprises: Dismounting the receiving portal; Moving the inner machine from the receiving portal into the receiving tunnel for receiving.

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