Large-pipe-diameter long-distance pipe jacking anti-kowtow construction device in soft soil area

Abstract

The utility model discloses a large-pipe-diameter long-distance pipe jacking anti-kowtow construction device in a soft soil area. The large-pipe-diameter long-distance pipe jacking anti-kowtow 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, an anti-kowtow device is assembled on the force transmission frame, and the lower end of the anti-kowtow device makes elastic contact with the pipe jacking machine. Therefore, the tail of the pipe jacking machine can be effectively prevented from upwarping, and the pipe jacking machine is prevented from gouges when going out of a hole initially, so that the pipe jacking work can be completed safely, efficiently and economically, and the construction quality of the pipe jacking 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-bumping construction devices, belong to pipe jacking construction technical field. BACKGROUND

[0002] Shao Du Road pipe jacking east-west crossing Yuyao 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 bank of Yuyao River, sinking well outer diameter 13m, maximum sinking depth reaches 22.5m. Since work well is close to Yuyao River embankment, pipe jacking burying 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 pipe jacking machine weight is concentrated on cutterhead, if encountering soft soil layer, machine head will incline and overturn. SUMMARY

[0003] The utility model aims at providing a kind of soft soil area large pipe diameter long distance pipe jacking anti-bumping construction device to prevent pipe jacking machine from bumping when initial hole, to safely, efficiently and 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-bumping 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, the force transmission frame is equipped with anti-bumping device, and the lower end of the anti-bumping device is in elastic contact with pipe jacking machine.

[0006] Preferably, the anti-bumping device includes support rod, spring assembly and elastic rubber wheel;The upper end of support rod is connected with force transmission frame, and the lower end is connected with elastic rubber wheel by spring assembly, and the elastic rubber wheel can be in elastic contact with pipe jacking machine below it.

[0007] Preferably, the spring assembly includes spring and upper pressing plate and lower pressing plate respectively connected with the upper and lower ends of spring, and the upper pressing plate is assembled at the lower end of support rod, and the lower pressing plate is installed with the elastic rubber wheel below it;Spring has several, and is evenly distributed between upper pressing plate and lower pressing plate.

[0008] Preferably, the force transmission frame is connected with the front end well wall around portal by counter-pulling device.

[0009] Preferably, the counter-pulling device includes several counter-pulling rods;One end of counter-pulling rod is connected with front end well wall by pre-buried anchoring structure, and the other end is fixed with frame body by connecting structure.

[0010] Preferably, the pre-embedded anchoring structure comprises anchor bars, a pre-embedded steel plate and external connecting bars; the anchor bars are anchored in the shaft wall, one side of the pre-embedded steel plate is welded and fixed with the anchor bars, and the other side is welded with the external connecting bars; the reverse pull rod is welded and fixed with the external connecting bars.

[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 the connecting plate is provided with a threaded hole, the reverse pull rod is screwed and fixed through the threaded hole and the mechanical sleeve.

[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; two adjacent standard segments are connected through the frame connecting plate.

[0014] Preferably, the frame body is provided with three groups of guide rail connecting plates, which are the first to third guide rail connecting plates; 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-head-butting construction device, which is described in the utility model, is provided with a force transmission frame on the frame body, and an anti-head-butting device is installed on the force transmission frame, so that the lower end of the anti-head-butting device is in elastic contact with the pipe jacking machine, thereby effectively preventing the tail of the pipe jacking machine from being raised, preventing the pipe jacking machine from butting when initially emerging from the hole, and thereby safely, efficiently and economically completing the pipe jacking work and improving the pipe jacking construction quality. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of the soft soil area large-pipe-diameter long-distance pipe jacking anti-head-butting construction device described in the utility model;

[0018] Figure 2 is a plan layout view of the soft soil area large-pipe-diameter long-distance pipe jacking anti-head-butting construction device described in the utility model;

[0019] Figure 3 is a transverse section layout view of the soft soil area large-pipe-diameter long-distance pipe jacking anti-head-butting construction device described in the utility model;

[0020] Figure 4 is a structural view of the reverse pulling device;

[0021] Figure 5 is a three-dimensional view of the reverse pulling device;

[0022] Figure 6 is a structure diagram of the head bumping prevention device;

[0023] Figure 7 is a three-dimensional diagram of the head bumping prevention device.

[0024] In the figure: 1, pipe jacking machine; I, track assembly; I-1, first track assembly; I-2, second track assembly; 121, frame body longitudinal beam; 122, frame body cross beam; 123, scissor brace; 124, frame body support column; 125, guide rail connecting piece; 123, scissor brace; 126, force transmission frame; 2, front end shaft lining; 3, counter pulling device; 31, stiffener; 32, connecting plate; 33, outer connecting rib; 34, counter 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 section; 12, main frame body; 13, scissor brace; 14, head bumping prevention device; 141, support rod; 142, elastic rubber wheel; 143, spring. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application. Unless otherwise specified, the relative arrangement, expression and numerical value of the components and steps described in these embodiments do not limit the scope of the present application. The technology, methods and equipment known to those skilled in the related art can not be discussed in detail, but should be considered 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 exemplary embodiments can have different values.

[0026] For purposes of the description hereinafter, spatial relations terms are used, such as "above", "below", "upper", "lower", and the like, to describe the relative position of one device or feature to another as the devices are depicted in the figures. The spatial terms are used only to facilitate the description because absolute spatial relations with respect to an absolute frame of reference are not necessary to describe one device or feature to another. Thus, a device could be laterally above another device as shown in a figure or above it in accordance with the drawings illustrated or the device could instead be downwardly below the other device depictured or below it depending on the positions of the devices relative to one another as they are placed in use or operation. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial descriptors used herein interpreted accordingly.

[0027] The soft soil area large pipe diameter long distance pipe jacking anti-bumping construction device, as shown in the drawings, comprises a frame body, a jack, a track assembly and a pipe jacking machine. Figure 1

[0028] The pipe jacking machine and the pipe joint are usually in a circular shape with strong compression resistance, and can also be in a rectangular shape if limited by the building use function. 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.

[0029] 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. The working well adopts a retaining structure of Larsen steel sheet pile, lock buckle steel pipe pile and caisson. A plain concrete wall is arranged at the pipe jacking exit range to facilitate the removal of the pipe jacking machine when it exits.

[0030] The frame body is installed in the working well and the track assembly is arranged on the frame body along the jacking direction, comprising a frame body longitudinal beam and a frame body transverse beam. The frame body longitudinal beam is arranged along the jacking direction, and the frame body transverse beam is arranged along a direction perpendicular to the jacking direction. The track assembly arranged on the frame body has two groups in total, corresponding to a first track assembly and a second track assembly, as shown in the drawings. Figure 2 .

[0031] ​One end of the frame body is provided with a jack support for mounting a jack and ensuring that the jack is in close contact with a rear backrest formed on the rear end wall of the working well, and the other end of the frame body is arranged close to a hole forming position on the front end wall of the working well. The rear backrest is a jack force diffusion component and is usually made of reinforced concrete. The rear backrest transmits the jacking force from the jack to the well wall to prevent local pressure damage to the well wall. The jack support is a jack bearing component, 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, a transverse connection can be arranged between the jack supports, and the rear side is in close contact with the main frame body cross beam. The jack is the main output component 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.

[0032] The track assembly comprises guide rails and tracks, the tracks are arranged on the guide rails by welding, and the guide rails are installed on the frame body cross beams by guide rail connecting plates. The tracks are I-shaped tracks for heavy cranes. The guide rails are square tubes with good bending resistance and are integrally formed by welding with the tracks. The guide rail connecting plates are arranged at fixed intervals and are bolted to the frame body cross beams arranged on the frame body. The guide rail connecting plates are composed of two triangular steel plates and two trapezoidal steel plates and are welded to the frame body cross beams.

[0033] The frame body is divided into three grades according to different pipe section diameters. The pipe section diameter of 0.9m to 1.5m is the first grade; the pipe section diameter of 1.8m to 3.3m is the second grade; and the pipe section diameter of 3.5m to 4.2m is the third grade. In other words, the frame body is provided with three groups of guide rail connecting plates, which are the first to third guide rail connecting plates. The first guide rail connecting plate is suitable for the third grade pipe section diameter, the second guide rail connecting plate is suitable for the second grade pipe section diameter, and the third guide rail connecting plate is suitable for the first grade pipe section diameter. The specific arrangement can be referred to the drawings. Figure 1 、 6 .

[0034] As shown in Figure 3 , the frame body is divided into several standard segments according to the highway transportation standard; two adjacent standard segments are connected by a frame connecting plate, and the frame connecting plate 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 structure, and the scissors brace adopts a channel steel section.

[0035] The force transmission frame is installed at a position close to the portal of the shaft, and is connected between the force transmission frame and the front shaft wall around the portal through a counter-pulling device, and an anti-head-butting device is assembled on the force transmission frame to elastically contact with the tail section / pipe section of the pipe jacking machine directly below the anti-head-butting device.

[0036] As shown in Figure 2 , the force transmission frame is in a U shape as a whole; the force transmission frame comprises two vertical support columns and a cross beam, the cross beam is arranged above the track assembly, the two vertical support columns are symmetrically arranged on both sides of the track assembly in the transverse direction, and the lower end of each vertical support column is fixed to the frame body and the upper end is connected to the cross beam.

[0037] The counter-pulling device is one of the important structures for connecting the frame body and the front shaft wall, and mainly functions 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 Figure 4 , Figure 5 , the counter-pulling device comprises a plurality of counter-pulling rods; one end of the counter-pulling rod is connected to the front shaft wall through a pre-buried anchoring structure, and the other end is fixed to the frame body through a connecting structure. The pre-buried anchoring structure comprises 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 to the anchor bar, and the other side is welded to the external connecting rib; the counter-pulling rod is welded and fixed to the external connecting rib; the connecting structure comprises a connecting plate and a mechanical sleeve; the connecting plate is welded and fixed to the frame body, and a threaded hole is arranged on the connecting plate; the counter-pulling rod is screwed and fixed through the threaded hole and the mechanical sleeve. Triangle stiffening plates are arranged around the connecting plate to avoid local buckling of the connecting plate under the action of the counter-pulling rod.

[0038] In the counter-pulling device, the anchor bar is made of a threaded steel bar, which is constructed together with the steel bars of the shaft wall during the construction of the sinking well. Considering that most of the working wells are constructed by the sinking 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 is made of a steel plate with a thickness of at least 16 mm, which is welded together with the anchor bar. The external connecting rib is made of a threaded steel bar with the same specification as the counter-pulling rod, which is arranged in a "U" shape, one end of which is welded to the pre-buried steel plate and the other end is welded to the counter-pulling rod. The purpose of arranging the external connecting rib is to prevent dislocation of the connection between the pre-buried steel plate and the frame body. 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 stiffening plates are additionally arranged around the connecting point with the force transmission frame.

[0039] The anti-head-butting device can be adjusted to different heights according to the size of the pipe section. The lower end of the anti-head-butting device is a wheel sliding structure with the rolling direction consistent with the jacking direction, which provides directional jacking force to prevent the pipe jacking machine from overturning (head-butting) when the pipe jacking machine exits the portal and inclines downward (head-butting). As shown in Figure 5 , Figure 6As shown, the anti-head-butting device comprises a support rod, a spring assembly and an elastic rubber wheel; the upper end of the support rod is connected with the force transmission frame, and the lower end is connected with the elastic rubber wheel through the spring assembly; the elastic rubber wheel can be in elastic contact with the pipe jacking machine located right below it. The spring assembly comprises springs and upper and lower pressing plates respectively connected with the upper and lower ends of the springs; 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 springs are evenly distributed between the upper and lower pressing plates.

[0040] When the pipe jacking machine appears head-butting, the hole door is usually taken as the pry point, the cutter head drives the machine head of the pipe jacking machine to incline downward, and the tail of the pipe jacking machine is upturned; the elastic wheel arranged on the force transmission frame can effectively prevent the tail from being upturned.

Claims

1. A large pipe diameter long distance pipe jacking construction device for soft soil area, comprising a frame body, a jack, a track assembly and a pipe jacking machine; characterized in that, The force transmission frame is provided with a head-bumping-preventing device, and the lower end of the head-bumping-preventing device is in elastic contact with the pipe jacking machine. The head-bumping-preventing device comprises a support rod, a spring assembly and an elastic rubber wheel.

2. The large pipe diameter long distance pipe jacking construction device in soft soil area according to claim 1, characterized in that, The spring assembly comprises springs and upper and lower pressing plates corresponding to the upper and lower ends of the springs.

3. The construction device for long-distance pipe pushing with large pipe diameter in soft soil area according to claim 1, characterized in that, The force transmission frame is connected with the front-end shaft wall of the tunnel portal through a counter-pulling device.

4. The construction device for long-distance pipe pushing with large pipe diameter in soft soil area according to claim 3, characterized in that, The counter-pulling device comprises a plurality of counter-pulling rods.

5. The construction device for long-distance pipe pushing with large pipe diameter in soft soil area according to claim 4, characterized in that, The counter-pulling rods are connected with the front-end shaft wall through a pre-buried anchoring structure and fixed with the frame through a connecting structure.

6. The construction device for long-distance pipe pushing with large pipe diameter in soft soil area according to claim 4, characterized in that, The pre-buried anchoring structure comprises anchor bars, a pre-buried steel plate and an external connecting bar.

7. The construction device for long-distance pipe pushing with large pipe diameter in soft soil area to prevent head collision according to claim 6, characterized in that, The anchor bars are anchored in the shaft wall, and the pre-buried steel plate is welded with the anchor bars on one side and welded with the external connecting bar on the other side.

8. The large pipe diameter long distance pipe jacking construction device in soft soil area according to claim 1, characterized in that, The counter-pulling rods are welded with the external connecting bar.

9. The construction device for long-distance pipe pushing with large pipe diameter in soft soil area to prevent head collision according to claim 8, characterized in that, The connecting structure comprises a connecting plate and a mechanical sleeve. The connecting plate is welded with the force transmission frame, and the connecting plate is provided with screw holes. The connecting plate is provided with triangular stiffening plates around the connecting points with the force transmission frame. The frame is divided into a plurality of standard segments according to the highway transportation standards. The adjacent two standard segments are connected through frame connecting plates. The frame is provided with three groups of guide rail connecting plates, namely first to third guide rail connecting plates. The first guide rail connecting plate is suitable for the third pipe segment, the second guide rail connecting plate is suitable for the second pipe segment, and the third guide rail connecting plate is suitable for the first pipe segment.

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