Anti-torsion construction device for large-pipe-diameter long-distance pipe jacking in soft soil area

Abstract

The utility model discloses a large-pipe-diameter long-distance pipe jacking anti-torsion construction device in a soft soil area. The large-pipe-diameter long-distance pipe jacking anti-torsion construction device comprises a frame body, a jack, a rail assembly and a pipe jacking machine. A force transmission frame is installed at the position, close to a tunnel portal, of the frame body, and an anti-torsion device is assembled between the force transmission frame and the tail section and / or the first pipe joint of the pipe jacking machine. Therefore, the torque generated by the cutter head of the pipe jacking machine can be effectively resisted, and the torsion condition of the pipe jacking machine is avoided, so that the pipe jacking work is safely, efficiently and economically finished, and the pipe jacking construction quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of soft soil area large pipe diameter long distance pipe jacking anti-torsion construction devices, belong to pipe jacking construction technical field. BACKGROUND

[0002] Shao Du Road pipe jacking east-west crossing Yu Yao River, total length 400m, adopts reinforced concrete pipe material, its outer diameter reaches 4.14m, along line buried depth 6m~16m. One work well and receiving well are set respectively on the two banks of Yu Yao River, sinking well outer diameter 13m, maximum sinking depth reaches 22.5m. Since work well is close to Yu Yao River embankment, pipe jacking buried depth reaches 16m, soil quality is typical soft soil quality in Ningbo, water and soil pressure produced is very strong. Under this environmental condition, pipe jacking machine is just out of hole, since negative friction torque produced by pipe jacking machine and pipe joint and surrounding soil layer is less than rotation torque produced by cutterhead at the front end of pipe jacking machine, leading to pipe jacking machine tail part rotates with cutterhead, causing tearing damage of ventilation pipe, sludge discharge pipe, electric power pipe lamp facilities in pipe jacking machine, if not controlled, it can further lead to uneven cutting of soil layer by cutterhead, causes soil layer collapse safety hazard and quality problem of pipe joint line deviation. SUMMARY

[0003] The utility model aims at providing a kind of soft soil area large pipe diameter long distance pipe jacking anti-torsion construction device, to prevent pipe jacking machine from torsion when initial hole, to safely, efficiently, economically complete pipe jacking jacking work, improve pipe jacking construction quality.

[0004] To achieve the above technical purpose, the utility model will adopt the following technical scheme:

[0005] A kind of soft soil area large pipe diameter long distance pipe jacking anti-torsion construction device, including frame body, jack, track assembly and pipe jacking machine;The frame body is installed with force transmission frame at the position close to portal, and the force transmission frame is equipped with anti-torsion device between pipe jacking machine tail section and / or first pipe joint.

[0006] Preferably, the anti-torsion device between the force transmission frame and pipe jacking machine tail section includes several anti-torsion wings A;Anti-torsion wing A is symmetrically arranged outside pipe jacking machine outer package steel body and contacts with track assembly, and the main plate surface of anti-torsion wing A is perpendicular to jacking direction.

[0007] Preferably, the anti-torsion device between the force transmission frame and first pipe joint includes anti-torsion wing B and anti-torsion bolt;Anti-torsion wing B includes several and is symmetrically welded outside the outer package steel plate of first pipe joint and contacts with track assembly, and the main plate surface of anti-torsion wing B is perpendicular to jacking direction;Anti-torsion bolt one end is welded and fixed with counterforce frame, the other end is inserted into the hoisting hole of first pipe joint, and the length extension direction of anti-torsion bolt is perpendicular to jacking direction.

[0008] Preferably, the force transmission frame is connected with the front end of the shaft wall around the portal through a counter-pulling device.

[0009] Preferably, the counter-pulling device comprises a plurality of counter-pulling rods, one end of the counter-pulling rod is connected with the front end of the shaft wall through a pre-buried anchoring structure, and the other end is fixed with the frame body through a connecting structure.

[0010] Preferably, the pre-buried anchoring structure comprises an anchoring bar, a pre-buried steel plate and an external connecting bar, the anchoring bar is anchored in the shaft wall, one side of the pre-buried steel plate is welded and fixed with the anchoring bar, and the other side is welded with the external connecting bar, and the counter-pulling rod is welded and fixed with the external connecting bar.

[0011] Preferably, the connecting structure comprises a connecting plate and a mechanical sleeve, the connecting plate is welded and fixed with the force transmission frame, and a screw hole is arranged on the connecting plate, the counter-pulling rod is screwed and fixed through the mechanical sleeve after passing through the screw hole.

[0012] Preferably, the connecting plate is additionally provided with a triangular stiffener plate around the connecting site with the force transmission frame.

[0013] Preferably, the frame body is divided into a plurality of standard segments according to the highway transportation standard, and two adjacent standard segments are connected through a frame connecting plate.

[0014] Preferably, three groups of guide rail connecting plates are arranged on the frame body, corresponding to the first to third guide rail connecting plates, wherein the first guide rail connecting plate is suitable for the third pipe segment outer diameter, the second guide rail connecting plate is suitable for the second pipe segment outer diameter, and the third guide rail connecting plate is suitable for the first pipe segment outer diameter.

[0015] Based on the above technical purposes, compared with the prior art, the utility model has the following advantages:

[0016] The soft soil area large pipe diameter long distance pipe jacking anti-torsion construction device, through the force transmission frame arranged on the frame body and the anti-torsion device assembled between the force transmission frame and the pipe jacking machine tail section and / or the first pipe segment, can effectively resist the torque generated by the pipe jacking machine cutter head, avoid the torsion of the pipe jacking machine, and safely, efficiently and economically complete the pipe jacking work, thereby improving the pipe jacking construction quality. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the structural schematic diagram of the soft soil area large pipe diameter long distance pipe jacking anti-torsion construction device;

[0018] Figure 2 is the plane layout drawing of the soft soil area large pipe diameter long distance pipe jacking anti-torsion construction device;

[0019] Figure 3It is the cross section layout of the anti-twist construction device of the large pipe diameter long distance pipe jacking in soft soil area;

[0020] Figure 4 It is the structure drawing of the anti-pulling device;

[0021] Figure 5 It is the three-dimensional drawing of the anti-pulling device;

[0022] Figure 6 It is the structure drawing of the anti-twist device of the pipe joint arrangement;

[0023] Figure 7 It is the three-dimensional drawing of the anti-twist device (pipe jacking machine hole state);

[0024] Figure 8 It is the three-dimensional drawing of the anti-twist device (lower pipe joint state).

[0025] 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, scissor brace; 124, frame support column; 125, guide rail connecting piece; 123, scissor brace; 126, force transmission frame; 2, front end well wall; 3, anti-pulling device; 31, stiffener; 32, connecting plate; 33, outer connecting rib; 34, anti-pulling rod; 35, pre-buried connecting steel plate b; 36, anchor bar; 37, mechanical sleeve; 38, gasket; 4, track; 5, guide rail; 6, backrest; 7, jack support; 8, jack; 9, guide rail stop plate; 10, frame connecting plate; 11, pipe joint; 12, main frame; 13, scissor brace; 14, anti-bumping device; 110, inner connecting profile steel; 111, pre-buried steel plate; 115, hoisting hole; 117, anti-twist wing; 119, anti-twist bolt. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. The description of the at least one exemplary embodiment is merely illustrative, but not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model. Unless otherwise specified, the relative arrangement, expression and numerical value of the components and steps set forth in these embodiments do not limit the scope of the utility model. The technology, method and equipment known to those skilled in the related art can not be discussed in detail, but should be regarded as part of the specification under appropriate circumstances. 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 can have different values.

[0027] For the convenience of description, spatial relative terms such as "above", "upper", "upper surface", "upper" and the like can be used herein to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "above" other devices or structures will be positioned "below" 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).

[0028] The soft soil area large pipe diameter long distance pipe jacking anti-torsion construction device, as shown in Figure 1 The utility model discloses a soft soil area large pipe diameter long distance pipe jacking anti-torsion construction device, as shown in

[0029] The pipe jacking machine and the pipe joint are usually in circular shape with strong compression resistance, and can also be in rectangular shape if limited by building use functions. The pipe jacking machine cuts the soil layer through the cutter head at the front end and transports the soil layer to the outside of the pit in the form of sludge or slurry discharge.

[0030] Since the pipe jacking construction is all underground, and there are many pipe jacking supporting equipment, the working well is set to isolate it from the surrounding soil layer. The working well adopts the supporting structure of Larsen steel sheet pile, lock buckle steel pipe pile and sunk well. The plain concrete wall is arranged at the pipe jacking exit range to facilitate the removal of the pipe jacking machine.

[0031] The frame body is installed in a working well and rail assemblies are arranged on the frame body along a jacking direction, the frame body comprises frame body longitudinal beams arranged along the jacking direction and frame body transverse beams arranged along a direction perpendicular to the jacking direction. Figure 2 .

[0032] One end of the frame body is provided with a jack support to install a jack and ensure that the jack is in close contact with a rear backrest constructed on a rear end wall of the working well, and the other end of the frame body is arranged close to a hole door construction position preset on a front end wall of the working well. The rear backrest is a jack force diffusion member and is usually a reinforced concrete structure. The rear backrest transmits the jacking force transmitted by the jack to the wall to prevent local pressure damage to the wall. The jack support is a jack bearing member, and the number of layers, height and width of the jack support are determined according to the shape and size of the pipe section. In order to avoid instability of the jack support during jacking, transverse connections can be provided between the jack supports and the rear side is in close contact with the main frame transverse beam. The jack is the main output member for pipe jacking, and different numbers and specifications of jacks are matched according to the size of the pipe section, the jacking length and the soil layer condition. The jack is placed on the jack support, and the lateral movement of the jack is limited by triangular steel plates welded on the support, and the rear end of the jack is in close contact with the rear backrest. The stroke of the jack should be greater than 250mm more than the length of the pipe section.

[0033] The rail assembly comprises guide rails and rails, the rails are arranged on the guide rails by welding, and the guide rails are installed on the frame transverse beams by guide rail connecting plates. The rails are I-shaped rails for heavy cranes. The guide rails are square tubes with good bending resistance and are integrally formed with the rails by welding. The guide rail connecting plates are bolted to the frame transverse beams within a fixed spacing. The guide rail connecting plates are composed of two triangular steel plates and two trapezoidal steel plates and are welded to the frame transverse beams.

[0034] The frame body of the utility model is divided into three grades according to different outer diameters of the pipe sections. The outer diameter of the pipe section is 0.9m-1.5m for the first grade, the outer diameter of the pipe section is 1.8m-3.3m for the second grade, and the outer diameter of the pipe section is 3.5m-4.2m for the third grade. In other words, the frame body is provided with three groups of guide rail connecting plates, corresponding to the first to third guide rail connecting plates, wherein: the first guide rail connecting plate is suitable for the third grade pipe section outer diameter arrangement, the second guide rail connecting plate is suitable for the second grade pipe section outer diameter arrangement, and the third guide rail connecting plate is suitable for the first grade pipe section outer diameter arrangement. For details, please refer to the accompanying drawings. Figure 1 、 6 .

[0035] As Figure 3As shown, the frame body is divided into several standard segments according to the highway transportation standard; two adjacent standard segments are connected through a frame body connecting plate, which usually adopts a connecting flange; the force transmission frame is built in the shape of a rectangular square tube, and a scissors brace is arranged between each rectangular square tube to enhance the stability of the main frame body structure, and the scissors brace adopts a channel steel section.

[0036] A force transmission frame is installed at the position where the frame body is close to the tunnel portal, and the force transmission frame is connected through a counter-pulling device between the front-end shaft wall around the tunnel portal, while a head collision prevention device is assembled on the force transmission frame to elastically contact the tail section / pipe section of the pipe jacking machine located directly below the head collision prevention device.

[0037] As shown in the drawings, Figure 2 The force transmission frame is in the shape of a U as a whole; it includes two vertical support columns and a crossbeam, the crossbeam is horizontally arranged above the track assembly, the two vertical support columns are symmetrically arranged on the two sides of the track assembly in the transverse direction, and the lower end of each vertical support column is fixed with the frame body, and the upper end is connected with the crossbeam.

[0038] The counter-pulling device is one of the important structures for connecting the frame body with the front-end shaft wall, and its main function is to resist the water and soil pressure transmitted from the front of the pipe jacking machine, and to provide certain anti-torsion and anti-overturning functions. As shown in the drawings, Figure 4 , Figure 5 The counter-pulling device includes several counter-pulling rods; one end of the counter-pulling rod is connected with the front-end shaft wall through a pre-buried anchoring structure, and the other end is fixed with the frame body through a connecting structure. The pre-buried anchoring structure includes an anchor bar, a pre-buried steel plate, and an external connecting rib; the anchor bar is anchored in the shaft wall, one side of the pre-buried steel plate is welded and fixed with the anchor bar, and the other side is welded with the external connecting rib; the counter-pulling rod is welded and fixed with the external connecting rib; the connecting structure includes a connecting plate and a mechanical sleeve; the connecting plate is welded and fixed with the frame body, and a screw hole is arranged on the connecting plate, the counter-pulling rod passes through the screw hole and is tightly fixed through the mechanical sleeve. Triangle stiffeners are arranged around the connecting plate to avoid local buckling of the connecting plate under the action of the counter-pulling rod.

[0039] In the counter-pulling device, the anchor bar adopts a threaded steel bar, which is constructed together with the shaft wall steel bar during the sinking well construction. Considering that most of the working wells are constructed by the sinking well method, the elevation and plan position error is large, and the anchor bar can also be planted by the post-anchoring method. The pre-buried steel plate adopts a steel plate with a thickness of at least 16 mm, which is welded together with the anchor bar. The external connecting rib adopts a threaded steel bar with the same specification as the counter-pulling rod, which is arranged in the shape of a "U", one end is welded with the pre-buried steel plate, and the other end is welded with the counter-pulling rod. The purpose of arranging the external connecting rib is to prevent the connection between the pre-buried steel plate and the frame body from being misaligned. In order to avoid local buckling of the connecting plate, a pad plate is additionally arranged at the bottom of the mechanical sleeve. In order to avoid local buckling of the connecting plate under the action of the counter-pulling rod, triangle stiffeners are additionally arranged around the connecting point with the force transmission frame.

[0040] When the pipe jacking machine first exits the tunnel, the negative skin friction torque generated by the machine and pipe sections against the surrounding soil is less than the rotational torque generated by the cutterhead at the front of the machine. This causes the tail of the machine to rotate with the cutterhead, resulting in tearing and damage to the ventilation pipes, sludge discharge pipes, and electrical wiring within the machine. If left uncontrolled, this can further lead to uneven cutting of the soil by the cutterhead, causing safety hazards such as soil collapse and quality issues such as pipe section misalignment. To prevent the pipe jacking machine from twisting, this invention innovatively proposes an anti-twist device, which is divided into two states based on the pipe jacking construction: the machine exiting the tunnel and the pipe section installation state.

[0041] When the pipe jacking machine is exiting the tunnel, to resist the torque generated by the cutterhead, several symmetrical anti-torsion wings A are welded onto the outer steel casing of the pipe jacking machine and contact the track assembly. When the cutterhead causes the pipe jacking machine body to twist, the anti-torsion wings A will firmly "lock" the track assembly. See the attached diagram for details. Figure 7 .

[0042] During the pipe section installation phase, anti-torsion wing B is welded to the outer steel plate of the first pipe section. Simultaneously, two anti-torsion pins are installed on its lifting holes and welded to the reaction frame. The reaction frame and working shaft resist the cutterhead torque. For details, please refer to the appendix. Figure 6 , Figure 8 At this point, the anti-torsion device equipped on the first pipe section includes an anti-torsion wing B and an anti-torsion pin; the main plate surface of the anti-torsion wing B is perpendicular to the jacking direction, and the lower wing plate of the anti-torsion wing B overlaps on the track assembly; an anti-torsion pin is installed in the lifting hole of the pipe section. The anti-torsion pin is welded and fixed to the force transmission frame, and the length extension direction of the anti-torsion pin is perpendicular to the jacking direction to achieve the anti-torsion function. The anti-torsion wing A and anti-torsion wing B are made of 20mm thick steel plate. The anti-torsion pin is made of square tubing.

[0043] Before the pipe jacking machine fully enters the tunnel portal, the anti-torsion wing installed on the pipe jacking machine is removed, and an anti-torsion wing is added to the first pipe section thereafter.

[0044] In addition, to increase torsional resistance, the pipe jacking machine and the first pipe section are connected as a whole using internal connecting steel. Each pipe section is also connected as a whole using internal connecting steel, and each pipe section has a pre-embedded steel plate on its inner wall at the position close to the pipe opening, which serves as a welding carrier for the internal connecting steel.

Claims

1. A large-diameter, long-distance pipe jacking anti-torsion construction device for soft soil areas, comprising a frame, jacks, track components, and a pipe jacking machine; characterized in that, The frame is equipped with a force transmission frame near the tunnel entrance. Anti-torsion devices are installed 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. The anti-torsion device between the force transmission frame and the tail section of the pipe jacking machine includes several anti-torsion wings A. The anti-torsion wings A are symmetrically arranged on the outer steel body of the pipe jacking machine and in contact with the track assembly, and the main plate surface of the anti-torsion wing A is perpendicular to the jacking direction. The anti-torsion device between the force transmission frame and the first pipe section includes anti-torsion wings B and anti-torsion pins. Several anti-torsion wings B are symmetrically welded to the outer steel plate of the first pipe section and in contact with the track assembly, and the main plate surface of the anti-torsion wings B is perpendicular to the jacking direction. One end of the anti-torsion pin is welded and fixed to the reaction frame, and the other end is inserted into the hoisting hole of the first pipe section, and the length extension direction of the anti-torsion pin is perpendicular to the jacking direction.

2. The anti-torsion construction device for large-diameter long-distance pipe jacking in soft soil areas according to claim 1, characterized in that, The force transmission frame is connected to the front wall of the tunnel entrance via a reverse tensioning device.

3. The anti-torsion construction device for large-diameter long-distance pipe jacking in soft soil areas according to claim 2, characterized in that, The aforementioned anti-pull device includes several anti-pull rods; one end of the anti-pull rod is connected to the front well wall through a pre-embedded anchoring structure, and the other end is fixed to the frame through a connecting structure.

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

5. The anti-torsion construction device for large-diameter long-distance pipe jacking in soft soil areas according to claim 3, characterized in that, The connection structure includes a connecting plate and a mechanical sleeve; the connecting plate is welded and fixed to the force transmission frame, and the connecting plate is provided with screw holes. The counter-pull rod passes through the screw holes and is tightened and fixed by the mechanical sleeve.

6. The anti-torsion construction device for large-diameter long-distance pipe jacking in soft soil areas according to claim 5, characterized in that, The connecting plate is reinforced with triangular stiffening plates around the connection point with the force transmission frame.

7. The anti-torsion construction device for large-diameter long-distance pipe jacking in soft soil areas according to claim 1, characterized in that, The frame is divided into several standard segments according to highway transportation standards; adjacent standard segments are connected by frame connecting plates.

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