Large-pipe-diameter long-distance pipe jacking construction device suitable for soft soil area

Abstract

The large-pipe-diameter long-distance pipe jacking construction device suitable for the soft soil area comprises a frame body, a force transmission frame is arranged on the other side, close to a tunnel portal, of the frame body, and the force transmission frame is anchored to the front end well wall around the tunnel portal through a reverse pulling device; an anti-kowtow device is assembled on the force transmission frame; the lower end of the kowtow prevention device is in elastic contact with the tube push bench to prevent the tail of the tube push bench from upwarping; when the jack retracts, anti-retreating devices are assembled between the force transmission frame and the tail section of the pipe jacking machine and between the force transmission frame and the first pipe section so as to prevent the pipe jacking machine and the first pipe section from retreating under the action of water and soil pressure. When the pipe jacking machine performs jacking construction, an anti-torsion device is assembled between the force transmission frame and the tail section and / or the first pipe section of the pipe jacking machine so as to resist torque generated by a cutter head of the pipe jacking machine. Therefore, the pipe jacking machine can be effectively prevented from retreating, twisting, knocking and the like when going out of a hole initially, so that the pipe jacking work is completed safely, efficiently and economically, and the pipe jacking construction quality is improved.

Description

Technical Field

[0001] The invention relates to a large-diameter and long-distance jacking pipe construction device suitable for soft soil areas, and belongs to the technical field of jacking pipe construction. Background Art

[0002] The Shaodu Road jacking pipe crosses the Yuyao River from east to west, with a total length of 400m. It uses reinforced concrete pipes with an outer diameter of 4.14m and a buried depth of 6m to 16m along the line. A working well and a receiving well are set up on both sides of the Yuyao River. The outer diameter of the caisson is 13m and the maximum sinking depth reaches 22.5m. Since the working well is close to the Yuyao River embankment, the jacking pipe is buried at a depth of 16m. The soil is a typical soft soil in Ningbo, and the water and soil pressure generated is very strong. Under such environmental conditions, the jacking machine will retreat, twist, and kowtow when it initially exits the hole, thus affecting the quality of the jacking construction.

[0003] Pipe jacking machine retreats: When the pipe jacking machine just comes out of the hole, the negative friction resistance generated by the pipe jacking machine, the pipe sections and the surrounding soil layers is less than the water and soil pressure received by the front end of the pipe jacking machine. When the jack retracts, the pipe jacking machine and the pipe sections will also retreat under the action of water and soil pressure, causing the soil layer in front of the pipe jacking machine to collapse and the ground to sink.

[0004] Pipe jacking torsion: When the pipe jacking machine just comes out of the hole, the negative friction torque generated by the pipe jacking machine, the pipe segments and the surrounding soil layers is smaller than the rotational torque generated by the cutter head at the front end of the pipe jacking machine, causing the tail of the pipe jacking machine to rotate with the cutter head, resulting in tearing and damage to the ventilation pipes, mud discharge pipes, power pipes and lighting facilities in the pipe jacking machine. If it is not controlled, it will further cause the cutter head to cut the soil layer unevenly, causing the safety hazard of soil collapse and the quality problem of pipe segment line deviation.

[0005] Pipe jacking head knock: When the pipe jacking machine just comes out of the hole, the weight of the pipe jacking machine is concentrated on the cutter head. If it encounters a soft soil layer, the head of the machine will overturn downward. Summary of the invention

[0006] The purpose of the present invention is to provide a large-diameter and long-distance jacking construction device and method suitable for soft soil areas, so as to prevent the jacking machine from retreating, twisting, knocking, etc. when initially exiting the hole, thereby completing the jacking work safely, efficiently and economically, and improving the quality of the jacking construction.

[0007] In order to achieve the above technical objectives, the present invention will adopt the following technical solutions: A large-diameter long-distance pipe jacking construction device suitable for soft soil areas comprises a frame, a jack, a track assembly and a pipe jacking machine; the frame is placed in a working well, a jack bracket is installed on one side of the frame close to the backrest, a force transmission frame is arranged on the other side close to the tunnel door, and the frame is anchored to the front end well wall around the tunnel door through a reverse pulling device; the bottom of the frame is fixed to the bottom of the working well; The jack is installed through the jack stand and is close to the rear backrest; The force transmission frame is equipped with an anti-knocking device; the lower end of the anti-knocking device is in elastic contact with the pipe jacking machine to prevent the tail of the pipe jacking machine from tilting upward; When the jack is retracted, an anti-retraction device is installed between the force transmission frame and the tail section of the pipe jacking machine and the first pipe section to prevent the pipe jacking machine and the first pipe section from retreating under the action of water and soil pressure; During the jacking construction of the pipe jacking machine, an anti-twist device is installed between the force transmission frame and the tail section and / or the first pipe section of the pipe jacking machine to resist the torque generated by the cutter head of the pipe jacking machine.

[0008] Preferably, the anti-pull device comprises a plurality of anti-pull rods; one end of the anti-pull rod is connected to the well wall through a pre-buried anchoring structure, and the other end is fixed to the frame through a connecting structure.

[0009] Preferably, the embedded anchoring structure comprises anchor bars, embedded steel plates and external connecting bars; the anchor bars are anchored in the well wall, one side of the embedded steel plate is welded to the anchor bars, and the other side is welded to the external connecting bars; the counter-pull rod is welded to the external connecting bars.

[0010] Preferably, the connection structure comprises a connection plate and a mechanical sleeve; the connection plate is welded and fixed to the frame, and a screw hole is provided on the connection plate, and the pull rod passes through the screw hole and is tightened and fixed by the mechanical sleeve.

[0011] Preferably, the anti-head-knocking device comprises a support rod, a spring assembly and an elastic rubber wheel; the upper end of the support rod is connected to the force transmission frame, and the lower end is connected to the elastic rubber wheel through the spring assembly, and the elastic rubber wheel can elastically contact the pipe jacking machine directly below it.

[0012] Preferably, the anti-twist device arranged between the force transmission frame and the tail section of the pipe jacking machine includes a plurality of anti-twist wings A; the anti-twist wings A are symmetrically arranged outside the outer steel body of the pipe jacking machine and in contact with the track assembly, and the main board surface of the anti-twist wings A is perpendicular to the jacking direction.

[0013] Preferably, the anti-twist device provided between the force transmission frame and the first pipe section comprises an anti-twist wing B and an anti-twist pin; The anti-twist wings B include several ones, which are symmetrically welded to the outer steel plate of the first pipe section and in contact with the track assembly, and the main board surface of the anti-twist wing B is perpendicular to the jacking direction; one end of the anti-twist pin is welded and fixed to the reaction frame, and the other end is inserted into the lifting hole of the first pipe section, and the length extension direction of the anti-twist pin is perpendicular to the jacking direction.

[0014] Preferably, the anti-recoil device comprises an anti-recoil wing; The anti-retreat wings equipped for the first pipe section include three types, corresponding to the first to third anti-retreat wings; the first pipe section is equipped with the first anti-retreat wing at the top position, the second anti-retreat wing at the middle position, and the third anti-retreat wing near the track assembly; the upper end of the first anti-retreat wing is welded and fixed to the force transmission frame, and the lower end is welded to the top of the first pipe section; the outer end of the second anti-retreat wing is welded and fixed to the force transmission frame, and the inner end is welded to the outer wall of the first pipe section at the middle position; the third anti-retreat wing is welded and fixed to the track assembly, and the upper end of the third anti-retreat wing is fixed to the position of the first pipe section close to the track assembly, and the main board surface of the third anti-retreat wing is parallel to the jacking direction.

[0015] Preferably, the anti-recoil wing provided at the tail section of the pipe jacking machine includes three types, corresponding to anti-recoil wing A, anti-recoil wing B and anti-recoil wing C, wherein: the tail section of the pipe jacking machine is provided with an anti-recoil wing A at the top position, an anti-recoil wing B at the middle position, and an anti-recoil wing C near the track assembly; the upper end of the anti-recoil wing A is welded and fixed to the force transmission frame, and the lower end is welded to the tail section of the pipe jacking machine, the outer end of the anti-recoil wing B is welded and fixed to the force transmission frame, and the inner end is welded to the outer wall of the pipe jacking machine at the middle position; the anti-recoil wing C is welded and fixed to the track assembly, and the upper end of the anti-recoil wing C is fixed to the position of the pipe jacking machine close to the track assembly, and the main board surface of the anti-recoil wing C is parallel to the jacking direction.

[0016] Preferably, three groups of guide rail connecting plates are arranged on the frame, corresponding to the first to third guide rail connecting plates, wherein: the first guide rail connecting plate is suitable for the third gear pipe segment outer diameter arrangement, the second guide rail connecting plate is suitable for the second gear pipe segment outer diameter arrangement, and the third guide rail connecting plate is suitable for the first gear pipe segment outer diameter arrangement.

[0017] Based on the above technical objectives, the present invention has the following advantages over the prior art: The large-diameter and long-distance pipe jacking construction device suitable for soft soil areas described in the present invention first sets a force transmission frame on the side of the frame body close to the front end well wall, and then installs the force transmission frame to the front end well wall through a reverse pulling device, and is equipped with an anti-knock device on the force transmission frame to prevent the tail of the pipe jacking machine from tilting up; when the jack retracts, a stop device is installed between the force transmission frame and the tail section of the pipe jacking machine and the first pipe section to prevent the pipe jacking machine and the first pipe section from retreating under the action of water and soil pressure; when the pipe jacking machine is in jacking construction, an anti-twist device is installed between the force transmission frame and the tail section of the pipe jacking machine and / or the first pipe section to resist the torque generated by the cutter disc of the pipe jacking machine. It can be seen that in the different processes of the pipe jacking construction, the present invention can effectively prevent the pipe jacking machine from retreating, twisting, knocking, etc. when it initially exits the hole by arranging suitable anti-twist devices and stop devices, thereby completing the pipe jacking work safely, efficiently and economically, and providing quality pipe jacking construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a large-diameter and long-distance pipe jacking construction device suitable for soft soil areas according to the present invention; Figure 2 It is a plan layout diagram of a large-diameter and long-distance pipe jacking construction device suitable for soft soil areas according to the present invention; Figure 3 It is a cross-sectional layout diagram of a large-diameter and long-distance pipe jacking construction device suitable for soft soil areas according to the present invention; Figure 4 It is the structural diagram of the pipe segment; Figure 5 It is the interface detail drawing of the pipe joint; Figure 6 It is a structural diagram of the anti-pull device; Figure 7 It is a three-dimensional diagram of the anti-pull device; Figure 8 It is a structural diagram of the anti-retraction device arranged in the pipe joint; Fig. 9 It is a three-dimensional diagram of the anti-retraction device (the state of the pipe jacking machine exiting the hole); Fig.10 It is a three-dimensional diagram of the anti-retraction device (the state of lowering the pipe section); Fig.11 It is a structural diagram of the anti-twist device arranged in the pipe joint; Fig.12 It is a three-dimensional diagram of the anti-twist device (the state of the pipe jacking machine coming out of the hole); Fig.13 It is a three-dimensional diagram of the anti-twist device (tube section lowered state); Fig.14 This is the structural diagram of the anti-kowtow device; Fig.15 It is a three-dimensional picture of the anti-kowtow device.

[0019] In the figure: 1, pipe jacking machine; Ⅰ, track assembly; Ⅰ-1, first track assembly; Ⅰ-2, second track assembly; 121, frame longitudinal beam; 122, frame cross beam; 123, scissors brace; 124, frame support column; 125, guide rail connector; 123, scissors brace; 126, force transmission frame; 2, front end well wall; 3, anti-pull device; 31, stiffening plate; 32, connecting plate; 33, external connecting bar; 34, Anti-pull rod; 35, embedded connecting steel plate b; 36, anchor bar; 37, mechanical sleeve; 38, gasket; 4, track; 5, guide rail; 6, backrest; 7, jack bracket; 8, jack; 9, guide rail stop plate; 10, frame connecting plate; 11, first pipe section; 12, main frame; 13, scissor support; 14, anti-knocking device; 141, support rod; 142, elastic rubber wheel; 143, spring; 110, inner connection steel; 111, inner ring embedded steel plate; 112, outer steel plate; 113, grouting hole; 114, grouting hole; 115, hoisting hole; 116, anti-retraction wing; 1161, first anti-retraction wing; 1162, second anti-retraction wing; 1163, third anti-retraction wing; 117, anti-twist wing; 118, outer ring embedded steel plate; 119, anti-twist pin; 1190. Positioning anchoring bars; 1191. Polysulfide sealant; 1192. Positioning steel ring; 1193. Sealing ring; 1194. Socket side; 1195. Pine wood pad; 1196. Internal connecting steel; 1197. Embedded connecting steel plate a; 1198. Anchoring bars; 1199. Socket side. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means any limitation to the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise specified, the relative arrangement, expressions and numerical values ​​of the components and steps described in these embodiments do not limit the scope of the present invention. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but in appropriate cases, the techniques, methods and equipment should be regarded as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0021] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations).

[0022] like Figure 1-15As shown, the large-diameter and long-distance pipe jacking construction device suitable for soft soil areas of the present invention comprises a frame, a jack, a track assembly and a pipe jacking machine; wherein: The pipe jacking machine and pipe section are usually in a round shape with strong compression resistance. If the building is limited by its use function, it can also be in a rectangular shape. The pipe jacking machine cuts the soil layer with the frontmost cutter disc and transports the soil layer to the outside of the pit in the form of mud or slurry discharge.

[0023] Since the pipe jacking construction is all done underground and there are many supporting equipment for the pipe jacking, it is isolated from the surrounding soil layer by setting up a working well. The working well adopts Larsen steel sheet piles, locking steel pipe piles, caisson and other supporting structures. A plain concrete wall is set in the range of the pipe jacking hole to facilitate the removal of the pipe jacking machine when it exits the hole.

[0024] The frame is installed in the working pit and a track assembly is arranged on the frame along the jacking direction, including a frame longitudinal beam and a frame cross beam. The frame longitudinal beam is arranged along the jacking direction, and the frame cross beam is arranged along a direction perpendicular to the jacking direction. There are two groups of track assemblies arranged on the frame, corresponding to the first track assembly and the second track assembly, see the attached Figure 2 .

[0025] A jack bracket is installed at one end of the frame to install the jack and ensure that the jack is close to the backrest constructed on the rear end wall of the working shaft. The other end of the frame is set close to the preset portal construction position on the front end wall of the working shaft. The backrest is used as a jack force diffusion component and is often a reinforced concrete structure. The backrest transmits the jacking force transmitted by the jack to the shaft wall to prevent the shaft wall from being damaged by local pressure. The jack bracket is a jack supporting component, and its distribution layer number, height, and width are determined according to the shape and size of the pipe segment. In order to avoid the jack bracket from becoming unstable during the jacking process, a lateral connection can be set between the jack brackets, and the rear side is close to the main frame beam. The jack is the main output component for the jacking of the pipe segment. Different numbers and specifications of jacks are matched according to the size of the pipe segment, the jacking length, and the soil layer conditions. The jack is placed on the jack bracket, and its lateral movement is limited by triangular steel plates welded on the bracket on both sides. The rear end of the jack is close to the backrest. The jack stroke should generally be more than 250mm greater than the pipe length.

[0026] The track assembly includes a guide rail and a track. The track is arranged on the guide rail by welding, and the guide rail is installed on the frame cross beam through the guide rail connecting plate. The track adopts the finished "I" track for heavy cranes. The guide rail adopts a square tube section with good bending resistance, and is welded with the track to form an integral body. The guide rail is provided with a guide rail connecting plate at a fixed interval, and is bolted to the frame cross beam arranged on the frame. The guide rail connecting plate consists of two triangular steel plates and two trapezoidal steel plates, which are welded to the frame cross beam.

[0027] The frame of the present invention is divided into three levels for arranging guide rails and tracks according to different outer diameters of pipe segments. The first level is for pipe segment outer diameters of 0.9m~1.5m; the second level is for pipe segment outer diameters of 1.8m~3.3m; the third level is for pipe segment outer diameters of 3.5m~4.2m. In other words, the present invention has three groups of guide rail connecting plates arranged on the frame, corresponding to the first to third guide rail connecting plates, wherein: the first guide rail connecting plate is suitable for the third level of pipe segment outer diameter arrangement, the second guide rail connecting plate is suitable for the second level of pipe segment outer diameter arrangement, and the third guide rail connecting plate is suitable for the first level of pipe segment outer diameter arrangement. For details, please refer to the attached Figure 1 , 6 .

[0028] like Figure 3 As shown, the frame is divided into several standard sections according to highway transportation standards; two adjacent standard sections are connected by a frame connecting plate, and the frame connecting plate usually adopts a connecting flange; the force transmission frame is constructed by rectangular square tubes, and scissor braces are arranged between each rectangular square tube to enhance the stability of the main frame structure, and the scissor braces adopt a channel steel cross-section.

[0029] A force transmission frame is installed at a position of the frame body close to the tunnel portal, and is connected to the front end well wall around the tunnel portal through a back-pull device. At the same time, an anti-knock device is installed on the force transmission frame to elastically contact the tail section / pipe section of the pipe jacking machine directly below the anti-knock device.

[0030] like Figure 2 As shown, the force transmission frame is U-shaped as a whole; it includes two vertical support columns and a crossbeam, the crossbeam spans above the track assembly, and the two vertical support columns are symmetrically arranged on both sides of the track assembly in the horizontal direction, and the lower end of each vertical support column is fixed to the frame body, and the upper end is connected to the crossbeam.

[0031] like Figure 4 , Figure 5 As shown, the pipe section of the present invention adopts C50P10 reinforced concrete pipe, which is divided into the first and last pipe sections according to the needs of the jacking project ( Figure 4 a) and standard pipe section ( Figure 4 b) in the above.

[0032] A circle of steel plates will be embedded in the outer side of the first and last pipe sections. When the jacking pipe is in place, the steel plates will be welded to the steel ring of the tunnel gate to form a whole, which can effectively prevent water leakage. In addition, when the jacking machine exits the tunnel, the outer steel plates can accommodate more anti-retraction wings and anti-twist wings. In the standard section, there is no outer steel plate, and the sealing ring at the pipe section interface is used to stop water, and a circle of water-stop steel ring is welded on the embedded steel plate of the inner circle of the pipe section to stop water (the three sections of the front and rear pipe sections are welded with internal connecting steel to increase the integrity of the pipe section. When the jacking pipe is in place, it will be removed and a circle of water-stop steel ring will be welded to stop water).

[0033] The anti-pull device is one of the important structures connecting the frame and the front end well wall. Its main function is to resist the water and soil pressure transmitted from the front of the pipe jacking machine and provide certain anti-torsion and anti-overturning functions.

[0034] like Figure 6 , Figure 7 As shown, the anti-pull device includes a plurality of anti-pull rods; one end of the anti-pull rod is connected to the front end well wall through a pre-buried anchoring structure, and the other end is fixed to the frame through a connecting structure. The pre-buried anchoring structure includes anchor bars, pre-buried steel plates and external connecting bars; the anchor bars are anchored in the well wall, one side of the pre-buried steel plate is welded and fixed to the anchor bars, and the other side is welded to the external connecting bars; the anti-pull rod is welded and fixed to the external connecting bars; the connecting structure includes a connecting plate and a mechanical sleeve; the connecting plate is welded and fixed to the frame, and a screw hole is provided on the connecting plate, and the anti-pull rod is passed through the screw hole and tightened and fixed by the mechanical sleeve. A triangular stiffening plate is provided around the connecting plate to prevent the connecting plate from being locally buckled under the action of the anti-pull rod.

[0035] In the anti-pull device, the anchor bar is made of threaded steel bars, which are constructed together with the shaft wall steel bars during the caisson construction. Considering that most of the working shafts are constructed by the caisson method, the elevation and plane position errors are large, and the anchor bars can also be installed by post-embedded reinforcement. The embedded steel plate is made of a steel plate at least 16mm thick and welded together with the anchor bars. The external connecting bar is made of threaded steel of the same specification as the anti-pull rod, set in a "U" shape, one end is welded to the embedded steel plate, and the other end is welded to the anti-pull rod. The purpose of arranging the external connecting bar is to prevent the connection between the embedded steel plate and the frame from being misaligned. In order to avoid local buckling of the connecting plate, a pad is added at the bottom of the mechanical sleeve. In order to avoid local buckling of the connecting plate under the action of the anti-pull rod, a triangular stiffening plate is added around the connection point with the force transmission frame.

[0036] The back-pull device transfers the water and soil pressure at the front end of the pipe jacking machine to the well wall. The transmission path is: water and soil pressure at the front end of the pipe jacking machine → pipe jacking machine or pipe section → weld between pipe jacking machine or pipe section and guide rail → guide rail baffle and guide rail → frame → back-pull device → well wall.

[0037] When the pipe jacking machine just comes out of the hole, the negative friction resistance generated by the pipe jacking machine, the first pipe section and the surrounding soil layer is less than the water and soil pressure received by the front end of the pipe jacking machine. When the jack retracts, the pipe jacking machine and the first pipe section will also retreat under the action of water and soil pressure, causing the soil layer in front of the pipe jacking machine to collapse and the ground to settle. The pipe jacking hole is an important node in the pipe jacking project and also a major risk source.

[0038] In order to increase the safety of the tunnel portal when chiseling and the pipe jacking machine exiting the tunnel, a cement mixing pile wall is usually set up within 5m outside the tunnel portal. According to the Rankine soil pressure formula, the self-stability of the cement mixing pile wall is much greater than the self-stability of the original soil layer. When the pipe jacking machine just exits the tunnel, it is still inside the cement mixing pile wall. The cutter head of the pipe jacking machine is basically not subject to water and soil pressure, and the number of stop wings required is relatively small. When the pipe jacking machine passes through the cement mixing pile wall, the original water and soil pressure on the cutter head will increase explosively, so the number of stop wings required is relatively large.

[0039] Specifically, the anti-recoil device includes an anti-recoil wing; Figure 8-Figure 10 As shown, the anti-retreat wings equipped for the first pipe section include three types, corresponding to the first to third anti-retreat wings; the first pipe section is equipped with the first anti-retreat wing at the top position, the second anti-retreat wing at the middle position, and the third anti-retreat wing near the track assembly; the upper end of the first anti-retreat wing is welded and fixed to the force transmission frame, and the lower end is welded to the top of the first pipe section; the outer end of the second anti-retreat wing is welded and fixed to the force transmission frame, and the inner end is welded to the outer wall of the first pipe section at the middle position; the third anti-retreat wing is welded and fixed to the track assembly, and the upper end of the third anti-retreat wing is fixed to the position of the first pipe section close to the track assembly, and the main board surface of the third anti-retreat wing is parallel to the jacking direction.

[0040] like Fig. 9 , Fig.10 As shown, the anti-recoil wing equipped with the pipe jacking machine includes two types, corresponding to anti-recoil wing A, anti-recoil wing B and anti-recoil wing C; the tail section of the pipe jacking machine is equipped with anti-recoil wing A at the top position, anti-recoil wing B at the middle position, and anti-recoil wing C near the track assembly. The upper end of the anti-recoil wing A is welded and fixed to the force transmission frame, and the lower end is welded to the tail section of the pipe jacking machine. The outer end of the anti-recoil wing B is welded and fixed to the force transmission frame, and the inner end is welded to the outer wall of the tail section of the pipe jacking machine at the middle position; the anti-recoil wing C is welded and fixed to the track assembly, and the upper end of the anti-recoil wing C is fixed to the position of the pipe jacking machine near the track assembly, and the main board surface of the anti-recoil wing C is parallel to the jacking direction. Of course, the present invention can also be equipped with anti-recoil wings for multiple sections of pipe jacking, not just the first section. As for how many pipe jacking sections need to be added for the arrangement of anti-recoil wings, it can be adjusted according to actual needs.

[0041] When the pipe jacking machine just comes out of the hole, the negative friction torque generated by the pipe jacking machine, the pipe joint and the surrounding soil layer is less than the rotation torque generated by the cutter head at the front end of the pipe jacking machine, causing the tail of the pipe jacking machine to rotate with the cutter head, resulting in tearing and damage to the ventilation pipe, mud discharge pipe, power pipe and lighting facilities in the pipe jacking machine. If not controlled, it will further cause the cutter head to cut the soil layer unevenly, causing the safety hazard of soil collapse and the quality problem of pipe joint line deviation. In order to avoid the twisting of the pipe jacking machine, the present invention innovatively proposes an anti-twist device, which is divided into the pipe jacking machine exiting the hole state and the pipe joint installation state according to the pipe jacking construction state.

[0042] When the pipe jacking machine is in the hole exiting state, in order to resist the torque generated by the cutter head of the pipe jacking machine, several symmetrical anti-twist wings A are welded on the outer steel body of the pipe jacking machine and contact the track assembly. When the cutter head drives the pipe jacking machine body to twist, the anti-twist wings A will firmly "stuck" the track assembly. For details, please refer to the attached Fig.12 .

[0043] When the pipe section is installed, the anti-twist wing B is welded on the outer steel plate of the first pipe section. At the same time, two anti-twist pins are set on its lifting hole and welded to the reaction frame. The reaction frame and the working well are used to resist the torque of the cutter head. For details, please refer to the attached Fig.11 , Fig.13 At this time, the anti-twist device of the first pipe section includes an anti-twist wing B and an anti-twist pin; the main plate surface of the anti-twist wing B is perpendicular to the jacking direction, and the lower wing plate of the anti-twist wing B is overlapped on the track assembly; the anti-twist pin is installed in the lifting hole of the pipe section. The anti-twist pin is welded and fixed on the force transmission frame, and the length extension direction of the anti-twist pin is perpendicular to the jacking direction to achieve the anti-twist function. The anti-twist wing A and the anti-twist wing B are made of 20mm thick steel plates. The anti-twist pin is made of square tube.

[0044] Before the pipe jacking machine completely enters the tunnel, the anti-twist wings on the pipe jacking machine are cut off and anti-twist wings are added to the first pipe section thereafter.

[0045] In addition, in order to increase the torsion resistance, the pipe jacking machine and the first pipe section are connected as a whole with an inner connecting steel. The pipe sections are also connected as a whole with inner connecting steel, and each pipe section is provided with an embedded steel plate on the inner wall close to the pipe mouth to serve as a welding carrier for the inner connecting steel. Specifically, the present invention embeds steel plates between the pipe jacking machine and the inner wall of the first pipe jacking section and the inner wall of the first three pipe jacking sections and uses steel to connect them to enhance the overall stability of the pipe jacking machine during initial operation, thereby improving the success rate of the device in achieving the goals of anti-twist, anti-knock, and anti-retreat.

[0046] Of course, the present invention can also be used to equip multi-section top pipe sections with anti-twist wings, and is not limited to the first section. As for how many top pipe sections need to be added to arrange the anti-twist wings, it can be adjusted according to actual needs.

[0047] The anti-knock device can be adjusted to different heights according to the size of the pipe section. The lower end of the anti-knock device is a roller structure whose rolling direction is consistent with the jacking direction. When the pipe jacking machine overturns (knocks) downward after leaving the hole, the device provides directional jacking force to prevent it from overturning (knocks). Fig.14 , Fig.15As shown, the anti-knocking device includes a support rod, a spring assembly and an elastic rubber wheel; the upper end of the support rod is connected to the force transmission frame, and the lower end is connected to the elastic rubber wheel through the spring assembly, and the elastic rubber wheel can elastically contact the pipe jacking machine directly below it. The spring assembly includes a spring and an upper pressing plate and a lower pressing plate respectively connected to the upper and lower ends of the spring, the upper pressing plate is assembled at the lower end of the support rod, and the elastic rubber wheel is installed below the lower pressing plate; the spring has a plurality of strips, which are evenly distributed between the upper pressing plate and the lower pressing plate.

[0048] When the pipe jacking machine knocks its head, the tunnel gate is usually used as a prying point, and the cutter disc drives the head of the pipe jacking machine to tilt downward, and the tail of the pipe jacking machine to tilt upward. The elastic wheel installed on the force transmission frame can effectively prevent the tail from tilting upward.

Claims

1. A large-diameter and long-distance pipe jacking construction device suitable for soft soil areas, comprising a frame, a jack, a track assembly and a pipe jacking machine; the frame is placed in a working well, characterized in that: The frame is provided with a jack bracket on one side close to the backrest, and a force transmission frame is provided on the other side close to the tunnel door, and is anchored to the front end well wall around the tunnel door through a reverse pulling device; The bottom of the frame is fixed to the bottom of the working well; The jack is installed through the jack stand and is close to the rear backrest; The force transmission frame is equipped with an anti-knocking device; the lower end of the anti-knocking device is in elastic contact with the pipe jacking machine to prevent the tail of the pipe jacking machine from tilting upward; When the jack is retracted, an anti-retraction device is installed between the force transmission frame and the tail section of the pipe jacking machine and the first pipe section to prevent the pipe jacking machine and the first pipe section from retreating under the action of water and soil pressure; During the jacking construction of the pipe jacking machine, an anti-twist device is installed between the force transmission frame and the tail section and / or the first pipe section of the pipe jacking machine to resist the torque generated by the cutter head of the pipe jacking machine.

2. The large-diameter and long-distance pipe jacking construction device suitable for soft soil areas according to claim 1 is characterized in that: The anti-pull device comprises a plurality of anti-pull rods; one end of the anti-pull rod is connected to the well wall through a pre-buried anchoring structure, and the other end is fixed to the frame through a connecting structure.

3. The large-diameter and long-distance pipe jacking construction device suitable for soft soil areas according to claim 2 is characterized in that: The embedded anchoring structure comprises anchor bars, embedded steel plates and external connecting bars; the anchor bars are anchored in the well wall, one side of the embedded steel plate is welded to the anchor bars, and the other side is welded to the external connecting bars; the pull rod is welded to the external connecting bars.

4. The large-diameter and long-distance pipe jacking construction device suitable for soft soil areas according to claim 3 is characterized in that: The connection structure comprises a connection plate and a mechanical sleeve; the connection plate is welded and fixed to the frame, and a screw hole is arranged on the connection plate, and the reverse pull rod passes through the screw hole and is tightened and fixed by the mechanical sleeve.

5. The large-diameter and long-distance pipe jacking construction device suitable for soft soil areas according to claim 1 is characterized in that: The anti-head-knocking device includes a support rod, a spring assembly and an elastic rubber wheel; the upper end of the support rod is connected to the force transmission frame, and the lower end is connected to the elastic rubber wheel through the spring assembly. The elastic rubber wheel can elastically contact the pipe jacking machine directly below it.

6. The large-diameter and long-distance pipe jacking construction device suitable for soft soil areas according to claim 1 is characterized in that: The anti-twist device arranged between the force transmission frame and the tail section of the pipe jacking machine includes a plurality of anti-twist wings A; the anti-twist wings A are symmetrically arranged outside the outer steel body of the pipe jacking machine and in contact with the track assembly, and the main board surface of the anti-twist wings A is perpendicular to the jacking direction.

7. The large-diameter and long-distance pipe jacking construction device suitable for soft soil areas according to claim 1 is characterized in that: The anti-twist device provided between the force transmission frame and the first pipe section includes an anti-twist wing B and an anti-twist pin; The anti-twist wings B include several ones, which are symmetrically welded to the outer steel plate of the first pipe section and in contact with the track assembly, and the main board surface of the anti-twist wing B is perpendicular to the jacking direction; one end of the anti-twist pin is welded and fixed to the reaction frame, and the other end is inserted into the lifting hole of the first pipe section, and the length extension direction of the anti-twist pin is perpendicular to the jacking direction.

8. The large-diameter and long-distance pipe jacking construction device suitable for soft soil areas according to claim 8 is characterized in that: The anti-recoil device comprises an anti-recoil wing; The anti-retreat wings equipped for the first pipe section include three types, corresponding to the first to third anti-retreat wings; the first pipe section is equipped with the first anti-retreat wing at the top position, the second anti-retreat wing at the middle position, and the third anti-retreat wing near the track assembly; the upper end of the first anti-retreat wing is welded and fixed to the force transmission frame, and the lower end is welded to the top of the first pipe section; the outer end of the second anti-retreat wing is welded and fixed to the force transmission frame, and the inner end is welded to the outer wall of the first pipe section at the middle position; the third anti-retreat wing is welded and fixed to the track assembly, and the upper end of the third anti-retreat wing is fixed to the position of the first pipe section close to the track assembly, and the main board surface of the third anti-retreat wing is parallel to the jacking direction.

9. The large-diameter and long-distance pipe jacking construction device suitable for soft soil areas according to claim 1 is characterized in that: The anti-recoil wing equipped at the tail section of the pipe jacking machine includes three types, corresponding to anti-recoil wing A, anti-recoil wing B and anti-recoil wing C, among which: the tail section of the pipe jacking machine is equipped with an anti-recoil wing A at the top position, an anti-recoil wing B at the middle position, and an anti-recoil wing C near the track assembly; the upper end of the anti-recoil wing A is welded and fixed to the force transmission frame, and the lower end is welded to the tail section of the pipe jacking machine, the outer end of the anti-recoil wing B is welded and fixed to the force transmission frame, and the inner end is welded to the outer wall of the pipe jacking machine at the middle position; the anti-recoil wing C is welded and fixed to the track assembly, and the upper end of the anti-recoil wing C is fixed to the position of the pipe jacking machine close to the track assembly, and the main board surface of the anti-recoil wing C is parallel to the jacking direction.

10. The large-diameter and long-distance pipe jacking construction device suitable for soft soil areas according to claim 1, characterized in that: There are three groups of guide rail connecting plates arranged on the frame, corresponding to the first to third guide rail connecting plates, wherein: the first guide rail connecting plate is suitable for the third gear pipe segment outer diameter arrangement, the second guide rail connecting plate is suitable for the second gear pipe segment outer diameter arrangement, and the third guide rail connecting plate is suitable for the first gear pipe segment outer diameter arrangement.

Images