Segmented rectangular pipe jacking for easy assembly

Abstract

The present invention relates to the technical field of positioning in pipe jacking construction, in particular to a segmented rectangular pipe jacking that is easy to assemble. It aims to solve the problems of low standardization degree of rectangular pipe jacking, difficult assembly construction, and low finished product accuracy in the prior art. The present invention includes at least two sub-assembled pipes that can be assembled into a rectangular pipe jacking. There are H-shaped auxiliary fixing rivets and sealing elements between the respective assembled pipes. An axial positioning mechanism for assisting the axial installation accuracy is also provided between the pipe rings formed by the rectangular pipe jacking. An anti-floating measurement component is also provided on the H-shaped auxiliary fixing rivet. The advantages are as follows: Without additional cost, the installation accuracy and sealing accuracy are improved, the labor intensity of workers is small, and the transfer difficulty during the transportation process is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of positioning in pipe jacking construction, and particularly to a segmented rectangular pipe jacking that is convenient for assembly. Background Art

[0002] Pipe jacking construction is a trenchless construction method, which is a pipeline laying construction technology with little or no excavation. Pipe jacking method construction is to generate jacking force with the help of jacking equipment in the working pit, overcome the friction between the pipeline and the surrounding soil, jack the pipeline into the soil according to the designed slope, and transport the soil away. After one section of the pipe is jacked into the soil layer, the second section of the pipe is lowered and jacked forward continuously. Its principle is to use the thrust of the main jack cylinder and between the pipelines and the relay jacks, etc., to push the tool pipe or tunneling machine from the working pit through the soil layer until it is lifted in the receiving pit. The pipeline follows closely behind the tool pipe or tunneling machine and is buried between the two pits. This technology is widely used in the non-excavation laying of various pipelines such as urban underground water supply and drainage pipelines, natural gas and oil pipelines, and communication cables in the economically developed coastal areas of our country. It can cross roads, railways, bridges, mountains, rivers and any buildings on the ground.

[0003] In the field of shield and tunneling technology, pipe jacking is divided into circular pipe jacking and square pipe jacking. The steps of pipe jacking construction usually include: 1. As concrete components, they are prefabricated by external partners, and after forming finished products, they are transported to the construction site in batches; 2. At the construction site, with the assistance of lifting devices, they are assembled to complete the installation of the pipe jacking.

[0004] Some technicians have also proposed to improve the pipe jacking technology. The main improvement directions are concentrated on the sealing between the pipe rings. For example, improving the sealing structure between the pipe rings, increasing the length of the leakage liquid path, and improving the sealing effect. Another example is to improve the material of the sealing ring to improve the sealing effect.

[0005] The applicant believes that the deficiencies in the prior art are as follows: 1. The overall installation volume of the pipe jacking is too large, which is not convenient for prefabrication and transfer transportation, and the individual weight is also too large; 2. Although the split type is convenient for assembly, the overall installation accuracy and assembly accuracy will be greatly affected, and the sealing strength requirement at the gap is high, and often there will be safety hazards in the later stage of construction due to misalignment. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems of low standardization degree, large assembly construction difficulty, and low finished product accuracy of rectangular pipe jacking in the prior art.

[0007] The specific solution of the present invention is:

[0008] A block-type rectangular jacking pipe which is easy to assemble is designed, comprising at least two sub-assembly pieces which can be assembled into a rectangular jacking pipe, H-type auxiliary fixing rivets and sealing elements are arranged between the respective assembly pipes, and an axial positioning mechanism for assisting axial installation accuracy is also arranged between the pipe rings formed by the rectangular jacking pipe, and an anti-floating measurement component is also arranged on the H-type auxiliary fixing rivet; the H-type auxiliary fixing rivet comprises a middle connecting plate, and four L-shaped anchor bolts sleeved in the middle connecting plate, the other end of the L-shaped anchor bolt is installed in a mounting hole reserved on the sub-assembly piece, and an expansion tube is arranged in the mounting hole so that the anchor bolt can be called an expansion bolt.

[0009] In a specific implementation, a sealing component is provided between the sub-assembly pieces to form a closed-loop seal. The sealing component includes an upper sealing strip and a lower sealing strip that are formed in a tooth-like staggered combination on two mating surfaces, and the contact surface between the upper sealing strip and the lower sealing strip is an inclined surface.

[0010] In a specific implementation, a level installation slot is provided on the top surface of the middle connecting plate of the H-shaped auxiliary fixing rivet, and a laser pen installation slot is provided on the side surface.

[0011] In a specific implementation, the middle connecting plate includes two vertical plates and a horizontal plate in the middle. The vertical plates are provided with horizontal mounting holes for inserting the horizontal plates, and the hole depth is greater than 1 / 2 of the thickness of the horizontal plates.

[0012] In a specific implementation, the front and rear of the sub-assembly piece are respectively provided with a boss and a concave surface that can form a match, and at least one sealing ring is provided between the boss and the concave surface.

[0013] Alternatively, the two sub-assembly tubes are replaced by four sub-assembly pieces, including angular side assembly pieces and a middle transverse assembly piece, wherein the assembly piece in the middle of the top is supported by the side assembly pieces, and the assembly piece in the middle of the bottom is pressed by the side assembly pieces.

[0014] In a specific implementation, the width of the transverse assembling piece is smaller than the inner height of the side assembling piece, and the diameter of the reserved grouting hole on the transverse assembling piece is larger than the maximum cross-sectional width of the L-shaped anchor bolt.

[0015] In a specific implementation, at the installation position of the H-type auxiliary fixing rivet, a groove matching the size of the H-type auxiliary fixing rivet is further provided on the sub-assembly piece.

[0016] In a specific implementation, in the L-shaped anchor bolt, the cross-section of the portion that matches the mounting hole is circular, and the cross-section of the portion that matches the middle connecting plate is square.

[0017] The beneficial effects of the present invention are:

[0018] Without increasing the cost, the installation accuracy and sealing precision are improved, the labor intensity of workers is reduced, and the difficulty of transfer during transportation is reduced;

[0019] The design between the rings formed by pipe jacking can achieve high-precision installation through clamping. At the same time, a fish-scale-like lap joint is formed through layer-by-layer connection. When the segment floats later, the greater the bending extrusion degree at the place where the bending arc is inward, the better the sealing performance. Although the surface tension of the corresponding exterior is large, the sealing performance is not affected under the effect of stacking, and the overall sealing effect is good, effectively preventing the leakage of slurry between the pipe rings.

[0020] During the transfer process, the equipment is disassembled into parts, reducing the single-load during transfer and also reducing the requirement for floor area. The load-bearing capacity per unit space is larger, and even further, the space utilization rate can be further improved through stacking.

[0021] The design of the H-shaped auxiliary fixing rivet can, on the one hand, strengthen the fixing strength between the segments and effectively prevent water seepage. On the other hand, its structural design can achieve the function of auxiliary positioning, effectively achieving accurate positioning in the coordinate axis direction and improving the assembly accuracy of the equipment.

[0022] Detection equipment can also be installed on the H-shaped auxiliary fixing rivet to detect the floating condition of the segments later, discover and feedback in a timely manner, facilitating the maintenance work of the later staff.

[0023] The design form of this design is diverse, facilitating the use of this equipment in various occasions. Brief Description of the Drawings

[0024] Figure 1 is the front view of the structure of the present invention;

[0025] Figure 2 is Figure 1 the sectional view taken along the line A-A in

[0026] Figure 3 is Figure 1 the sectional view taken along the line B-B in the structure;

[0027] Figure 4 is the three-dimensional view of the structure of the present invention;

[0028] Figure 5 is the schematic structural view of the installation of the H-shaped auxiliary fixing rivet in the present invention;

[0029] Figure 6 is the three-dimensional view of another embodiment in the present invention;

[0030] Figure 7 is Figure 6 the front view of the structure shown;

[0031] Figure 8 is Figure 6 the top view of the structure shown;

[0032] Names of each component in the figure: 1. Sub-assembled piece; 2. H-shaped auxiliary fixing rivet; 3. Middle connecting plate; 4. L-shaped anchor bolt; 5. Expansion tube; 6. Upper sealing strip; 7. Lower sealing strip; 8. Level instrument installation groove; 9. Vertical plate; 10. Horizontal plate; 11. Boss; 12. Concave surface; 13. Transverse assembled piece; 14. Sealing strip forming a sealing ring. Specific embodiments

[0033] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention. Embodiment 1

[0034] A segmented rectangular pipe jacking that is easy to assemble. Refer to Figures 1 to 6 , the design includes at least 2 sub-assembled pieces 1 that can be assembled into a rectangular pipe jacking. There are H-shaped auxiliary fixing rivets 2 and sealing elements between the respective assembled pipes. An axial positioning mechanism for assisting the axial installation accuracy is also provided between the pipe rings formed by the rectangular pipe jacking. A floating prevention measurement component is also provided on the H-shaped auxiliary fixing rivet 2; the H-shaped auxiliary fixing rivet 2 includes a middle connecting plate 3 and 4 L-shaped anchor bolts 4 sleeved inside the middle connecting plate 3. The other ends of the L-shaped anchor bolts 4 are installed in the installation holes reserved on the sub-assembled piece, and an expansion tube 5 that can make the anchor bolt a expansion bolt is provided in the installation hole.

[0035] A sealing component that can form a closed-loop seal is provided between the sub-assembled pieces. The sealing component includes an upper sealing strip 6 and a lower sealing strip 7 that form a toothed staggered combination on two mutually attached surfaces. During the combination process of the upper and lower sub-assembled pieces, the contact surface between the upper sealing strip 6 and the lower sealing strip 7 is an inclined surface, which can better promote the high-precision clamping between the two.

[0036] A level instrument installation groove 8 is provided on the top surface of the middle connecting plate 3 of the H-shaped auxiliary fixing rivet 2, and a laser pen installation card slot is provided on the side surface. If a level instrument is installed, it can be observed whether there is floating and what kind of floating by comparing the inclination of the plane. If a laser pen is installed, it can be observed whether the pipe segments float by the change of the projection of the light on the adjacent middle connecting plates 3 in the front and back.

[0037] In a further specific implementation, the middle connecting plate 3 includes two vertical plates 9 and a middle horizontal plate 10. Horizontal installation holes for inserting the horizontal plate 10 are provided on the vertical plates 9, and the hole depth is greater than 1 / 2 of the thickness of the horizontal plate 10. This design is to facilitate the adjustment of its spacing to adapt to pipe segments of different design sizes.

[0038] Bosses 11 and concave surfaces 12 that can form a fit are provided on the front and back of the sub-assembled piece 1, and at least one circle of sealing rings is provided between the bosses 11 and the concave surfaces 12. Assemble layer by layer during the assembly process.

[0039] During the transportation process, each sub-assembled piece is transported independently. Meanwhile, during the transportation process, the space can be utilized efficiently by stacking. During the working process, first install the sub-assembled piece 1 at the bottom, and then the assembled piece at the top slowly descends. Under the guidance of the serrated sealing component, the sealing ring gradually realizes the cartridge, and then realizes relatively precise alignment and installation. During the alignment process, one end of the L-shaped bolt follows the equipment movement at a position where the length of the embedded installation hole is less than 3 cm. During the movement, a sleeve fit is achieved between the square hole and the middle connecting plate 3. When the two sub-assembled pieces are assembled in place, apply force to the H-shaped auxiliary fixing rivet 2 to squeeze it into the installation hole. Since the expansion tube 5 is installed in the installation hole, a more stable installation can be further realized, and further, the stable cooperation of the two sub-assembled pieces 1 is achieved. During the process, the length of the square hole is greater than the sum of the mating lengths of the two H-shaped auxiliary fixing rivets 2. At the same time, the installation of the L-shaped bolt in the middle connecting plate 3 is equivalent to loose sleeve positioning, which only has a restricting effect and no fixing effect.

[0040] The measurement process is as follows. After grouting, on the one hand, the middle connecting plate can be used to install a level on its top to measure the horizontal inclination angle. If it is inconsistent with the installation state, it means that the segment has undergone deformation such as bending in the vertical or horizontal direction, which can remind the website maintenance personnel to make corrections as soon as possible. In this embodiment, the optical principle can also be combined to use a laser pen to detect the relative position offset.

[0041] The design of the convex platform 11 and the concave surface 12 facilitates the tight fit between the successively assembled pipe rings. At the same time, the sealing performance is good. Especially in the state where the segments are floating, it can effectively prevent the water seepage caused by floating. Embodiment 2

[0042] The working principle of this embodiment is the same as that of Embodiment 1. The specific difference is that 2 sub-assembled pipes are replaced by 4 sub-assembled pieces 1, including the side assembled pieces with edges and the middle horizontal assembled piece 13. Among them, the assembled piece in the middle at the top is in the position supported by the side assembled pieces, and the assembled piece in the middle at the bottom is in the position pressed by the side assembled pieces. In this design, the horizontal assembled piece 13 is positioned and constrained by the side assembled pieces through structural design, and an external fixing mechanism does not need to be applied again, only the sealing mechanism is retained. This design also has an advantage that multiple side seals can effectively prevent the damage caused by the expansion and contraction of the segments in the later stage, and the sealing strips at each joint play a role of buffering and waterproofing.

[0043] At the same time, the horizontal assembled piece 13 can be selected with different lengths to adapt to different construction dimension requirements.

[0044] The width of the transverse assembly piece 13 is smaller than the inner height of the side assembly piece, and the diameter of the reserved grouting hole on the transverse assembly piece 13 is larger than the maximum cross-sectional width of the L-shaped anchor bolt 4. This design can effectively expand the function of the L-shaped anchor bolt 4. During the transportation process, the L-shaped anchor bolt 4 can be used as an installation axis, pass through multiple transverse assembly pieces 13, and finally be installed in the reserved installation hole on the side assembly piece to achieve fixation during transportation. It effectively prevents bumps caused by shaking.

[0045] At the installation position of the H-type auxiliary fixing rivet 2, the sub-assembly piece is also provided with a groove that matches the size of the H-type auxiliary fixing rivet 2. The design purpose is to finally drive the H-type auxiliary fixing rivet 2 into the pipe segment to prevent stress deformation caused by later collisions, and can also effectively expand the space inside the pipe segment, while being more conducive to the equipment parts as a whole to resist later deformation together.

[0046] In the L-shaped anchor bolt 4, the cross section of the part that matches the mounting hole is circular, and the cross section of the part that matches the middle connecting plate 3 is square. This design ensures that the design idea of the expansion bolt can be realized on the one hand, and on the other hand, the square matching connection has more freedom restrictions on the rotation direction than the circular sleeve connection, which has a better horizontal and vertical fixing effect and is more conducive to improving assembly accuracy.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A segmented rectangular pipe jacking that is easy to assemble, characterized in that: It includes at least 4 sub-assembly pieces (1) that can be assembled into a rectangular jacking pipe. There are H-shaped auxiliary fixing rivets (2) and sealing elements between the respective assembled pipes. An axial positioning mechanism for assisting the axial installation accuracy is also provided between the pipe rings formed by the rectangular jacking pipes. A floating-preventing measurement component is also provided on the H-shaped auxiliary fixing rivet (2). The H-shaped auxiliary fixing rivet (2) includes a middle connecting plate (3) and 4 L-shaped anchor bolts (4) sleeved inside the middle connecting plate (3). The other ends of the L-shaped anchor bolts (4) are installed in the installation holes reserved on the sub-assembly pieces. An expansion tube (5) is provided in the installation holes to enable the anchor bolts to be expansion bolts. A spirit level installation groove (8) is provided on the top surface of the middle connecting plate (3) of the H-shaped auxiliary fixing rivet (2), and a laser pen installation card slot is provided on the side surface. The sub-assembly piece (1) includes a side assembly piece with edges and a middle transverse assembly piece (13). Among them, the assembly piece in the middle of the top is in a position supported by the side assembly pieces, and the assembly piece in the middle of the bottom is in a position pressed by the side assembly pieces. The width of the transverse assembly piece (13) is smaller than the inner height of the side assembly pieces. The diameter of the reserved grouting hole on the transverse assembly piece (13) is larger than the maximum cross-sectional width of the L-shaped anchor bolt (4). At the installation position of the H-shaped auxiliary fixing rivet (2), a groove matching the size of the H-shaped auxiliary fixing rivet (2) is also provided on the sub-assembly piece. A sealing component for forming a closed-loop seal is provided between the sub-assembly pieces. The sealing component includes an upper sealing strip (6) and a lower sealing strip (7) that form a toothed staggered combination on the two mutually attached surfaces. The contact surface between the upper sealing strip (6) and the lower sealing strip (7) is an inclined surface.

2. The block-shaped rectangular pipe jacking facilitating assembly according to claim 1, wherein: The middle connecting plate (3) includes two vertical plates (9) and a middle horizontal plate (10). Horizontal installation holes for inserting the horizontal plate (10) are provided on the vertical plates (9), and the hole depth is greater than 1 / 2 of the thickness of the horizontal plate (10).

3. The block-shaped rectangular pipe jacking that is easy to assemble according to claim 2, wherein: A boss (11) and a concave surface (12) that can form a fit are respectively provided on the front and rear of the sub-assembly piece (1). At least 1 circle of sealing rings is provided between the boss (11) and the concave surface (12).

4. The block-shaped rectangular pipe jacking that is easy to assemble according to claim 1, wherein: In the L-shaped anchor bolt (4), the cross-section of the part matching the installation hole is circular, and the cross-section of the part matching the middle connecting plate (3) is square.

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