A jacking structure and jacking method for mechanical jacking pipe in hard formation

Abstract

The invention discloses a mechanical pipe jacking structure and a pipe jacking method for hard formations, the pipe jacking structure comprising: a pipe jacking machine, a pipeline, a steel rail, an I-beam support beam, a steel cross beam, a sliding block, a slide groove, a steel cable and a jack; each steel cross beam is laid in parallel on the bottom plate of a pipe jacking working pit, and two I-beam support beams are laid in parallel on each steel cross beam; the outer flanges of the two steel cross beams are respectively provided with slide grooves, and a plurality of sliding blocks are clamped in the slide grooves of the outer flanges of the steel cross beams; the steel rail is arranged above the I-beam support beam, the pipe jacking machine and the pipeline are arranged above the steel rail, and the jack is arranged at the end of the pipe jacking machine and the pipeline, so as to complete the jacking of the pipe jacking machine and the pipeline; and the pipe jacking machine and / or the pipeline are movably fixed on the sliding blocks in the outer slide grooves of the two I-beam support beams through steel cables, so that the relative position between the pipe jacking machine and / or the pipeline and the steel rail is fixed.

Description

Technical Field

[0001] The invention belongs to the field of mechanical pipe jacking, and in particular relates to a jacking structure and a jacking method for mechanical pipe jacking in hard formations. Background Art

[0002] As part of underground engineering, rainwater and sewage pipes are the main means to solve urban waterlogging disasters, rainwater runoff pollution, water shortage and other problems. With the needs of urbanization, the renovation of old urban areas and the vigorous development of public utilities, the diameter of the pipes has increased and the construction length has become longer and longer. At the same time, the diversity and complexity of the urban environment and geological environment have increased the difficulty of construction. Pipe jacking construction is currently the most commonly used and efficient method because it can reduce the amount of earthwork and has little impact on the environment of ground structures.

[0003] At present, there are two types of pipe jacking methods used in underground pipeline construction: mechanical pipe jacking and manual pipe jacking. Manual pipe jacking has the advantages of economy and convenience when the burial depth is shallow, the groundwater level is deep, and the construction distance is short. However, it requires a large amount of manpower in long-distance, deep-buried, complex geological environment, and difficult precipitation pipeline projects, and it is inefficient and less safe. Mechanical pipe jacking is suitable for a wide range of applications in various geological environments, and is safe and controllable in the construction of deep-buried pipelines crossing roads, rivers, railways, ground buildings, underground structures, and various underground pipelines. At the same time, it is not affected by seasonal factors and has high construction efficiency.

[0004] Mechanical pipe jacking is to install rails, jacks and other equipment in the working well. The pipe jacking machine cuts the soil in front and pushes the pipe jacking machine and prefabricated pipes into the receiving well according to the designed axis under the action of the jack, so as to bury the pipe with certain functions underground. However, in hard formations, due to the reaction force of the pebbles or rock layers on the cutting of the cutter head during the initial jacking, the pipe jacking machine or the pipeline (the first three sections are fixed to the pipe jacking machine) will vibrate irregularly, causing the machine head to deviate from the designed axis, affecting the construction efficiency and increasing the difficulty of correcting the deviation in the subsequent jacking process. The reinforcement method currently used on the construction site requires increased labor input, which affects the construction efficiency to a certain extent and is unsafe. At the same time, its vibration reduction effect is limited.

[0005] Therefore, a new jacking structure is needed for mechanical pipe jacking in hard formations. Summary of the invention

[0006] The purpose of the present invention is to overcome the problems of the prior art and disclose a jacking structure and a jacking method for mechanical jacking pipes in hard formations. By setting up the jacking structure and the jacking method of the present invention, the vibration of the jacking machine and / or the pipeline can be safely and effectively reduced, thereby ensuring the quality and efficiency of the jacking construction.

[0007] On the one hand, the purpose of the present invention is achieved by the following technical solutions:

[0008] A jacking structure for mechanical jacking of pipes in hard formations, the jacking structure comprising: a pipe jacking machine, a pipeline, a steel rail, an I-beam support beam, a steel cross beam, a sliding block, a slide groove, a steel cable and a jack; each steel cross beam is laid in parallel on the bottom plate of a pipe jacking working pit, and two I-beam support beams are laid in parallel on each steel cross beam; the outer flanges of the two steel cross beams are respectively provided with slide grooves, and a plurality of sliding blocks are clamped in the slide grooves of the outer flanges of the steel cross beams; the steel rail is arranged above the I-beam support beam, the pipe jacking machine and the pipeline are arranged above the steel rail, and the jack is arranged at the end of the pipe jacking machine and the pipeline, for completing the jacking of the pipe jacking machine and the pipeline; and the pipe jacking machine and / or the pipeline are movably fixed to the sliding blocks in the outer slide grooves of the two I-beam support beams via steel cables, so that the relative position between the pipe jacking machine and / or the pipeline and the steel rail is fixed.

[0009] According to a preferred embodiment, the two I-beam support beams are connected and fixed to the steel cross beam via steel angle braces.

[0010] According to a preferred embodiment, the slide grooves are distributed on the upper and lower outer flanges of the I-beam support beam, and each of the upper and lower flanges has two slide grooves.

[0011] According to a preferred embodiment, each chute is composed of two long steel plates welded on a flange, and a rectangular stopper is provided at the end of the chute to seal it.

[0012] According to a preferred embodiment, a triangular steel plate is welded every 30 cm on the outside of the slideway to complete the reinforcement between the long steel plate and the I-beam support beam.

[0013] According to a preferred embodiment, the sliding block includes a box-shaped steel block, a steel cable fastener and a steel ball; the box-shaped steel block is a double-box single-chamber, and has protruding flanges on both sides, and the ends of the flanges have semicircular grooves, and the steel ball is installed in the semicircular grooves; the protruding flanges on both sides of the box-shaped steel block are clamped in the slide groove and move under the action of the steel ball; the steel cable fastener is fixed to the surface of the box-shaped steel block.

[0014] According to a preferred embodiment, the steel cable is fixed to the box-shaped steel block via a steel cable fastener.

[0015] According to a preferred embodiment, the steel cable fastener is fixed to the surface of the box-shaped steel block via bolts.

[0016] According to a preferred embodiment, the steel cable is formed by winding two steel strands, each end of the steel strand is ring-shaped, and the steel strand is sleeved on the steel cable fastener; the ends of the steel cable are fixed with steel sheets to fix the two steel strands.

[0017] On the other hand, the present invention also discloses:

[0018] A method for mechanical pipe jacking in hard formations, the method adopting the aforementioned jacking structure, the method comprising: securing a steel crossbeam on the bottom plate of a pipe jacking shaft, welding and installing an I-beam support beam on the steel crossbeam, installing a slide groove and a sliding block on the outer flange of the I-beam support beam, then installing a steel rail on the I-beam support beam, and finally connecting the sliding block with a steel cable to fix the pipe jacking machine and / or the pipeline. During the jacking process, the steel cable automatically moves with the pipe jacking machine body and the pipeline under the action of the sliding block.

[0019] The aforementioned main scheme of the present invention and its further options can be freely combined to form multiple schemes, all of which are schemes that can be adopted and claimed for protection by the present invention. After understanding the scheme of the present invention, those skilled in the art can understand that there are multiple combinations based on the prior art and common knowledge, all of which are technical schemes to be protected by the present invention, and they are not exhaustively listed here.

[0020] Beneficial effects of the present invention:

[0021] By means of the jacking structure and / or jacking method of the mechanical jacking pipe in hard formations of the present invention, the jacking machine 1 and / or the pipe 2 (the first three sections are pipes fixedly connected to the jacking machine) are reinforced when the mechanical jacking pipe in hard formations is initially jacked, thereby avoiding severe vibration caused by the reaction force of the pebbles or rock layers on the cutting disc, ensuring the jacking quality of the pipe 2 and reducing the axis deviation.

[0022] At the same time, the application of slide groove and sliding block system reinforcement technology in the jacking guide structure can realize the automatic overall movement of the reinforcement system and the jacking machine or pipeline structure, and its vibration reduction effect is obvious. At the same time, it can avoid manual advancement, reduce labor, improve safety, improve construction efficiency, and save construction time and costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the jacking structure of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the slideway in the jacking structure of the present invention;

[0025] Figure 3 It is a structural schematic diagram of a sliding block in the jacking structure of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the steel cable in the jacking structure of the present invention;

[0027] Among them, 1-pipe jacking machine, 2-pipeline, 3-rail, 4-I-beam support beam, 5-steel angle brace, 6-steel cross beam, 7-sliding block, 71-box-shaped steel block, 72-steel cable fastener, 73-bolt, 74-semicircular groove, 75-steel ball, 76. Bolt hole, 8. slide groove, 81-long steel plate, 82-triangular steel plate, 83-rectangular stopper, 9-steel cable, 91-steel strand, 92-steel sheet, 10-side wall of pipe jacking well. DETAILED DESCRIPTION

[0028] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0029] It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in the subsequent figures. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invented product is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0030] In addition, terms such as "horizontal", "vertical", and "overhanging" do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, the present invention should be pointed out that, in the present invention, unless the specific structure, connection relationship, positional relationship, power source relationship, etc. are specifically written out, the structure, connection relationship, positional relationship, power source relationship, etc. involved in the present invention are all known by those skilled in the art on the basis of the prior art without creative work.

[0032] Embodiment 1:

[0033] refer to Figures 1 to 4 As shown, the figure shows a jacking structure of a mechanical pipe jacking in a hard formation, and the jacking structure includes: a pipe jacking machine 1, a pipeline 2, a rail 3, an I-beam support beam 4, a steel cross beam 6, a sliding block 7, a slide chute 8, a steel cable 9 and a jack.

[0034] Preferably, each steel cross beam 6 is laid in parallel on the bottom plate of the top pipe working shaft, and two I-beam support beams 4 are laid in parallel on each steel cross beam 6 .

[0035] Furthermore, the two I-beam support beams 4 are connected and fixed to the steel cross beam 6 via the steel angle braces 5. The steel angle braces 5 are respectively connected to the I-beam support beam 4 and the steel cross beam 6 by welding.

[0036] Preferably, the outer flanges of the two steel beams 6 are respectively installed with slide grooves 8 , and a plurality of sliding blocks 7 are clamped in the slide grooves 8 of the outer flanges of the steel beams 6 .

[0037] Furthermore, the slide grooves 8 are distributed on the upper and lower flanges outside the I-beam support beam, and each of the upper and lower flanges has two slide grooves 8.

[0038] Preferably, each chute 8 is formed by two long steel plates 81 welded on a flange, and a rectangular stopper 83 is provided at the end of the chute 8 for blocking.

[0039] Furthermore, a triangular steel plate 82 is welded every 30 cm on the outside of the slide groove 8 to complete the reinforcement between the long steel plate 81 and the I-beam support beam.

[0040] Preferably, the rail 3 is arranged above the I-beam support beam 4, the pipe jacking machine 1 and the pipeline 2 are arranged above the rail 3, and the jack is arranged at the end of the pipe jacking machine 1 and the pipeline 2 to complete the jacking of the pipe jacking machine 1 and the pipeline 2.

[0041] The pipe jacking machine 1 and / or pipeline 2 is movably fixed on the sliding block 7 in the outer slide groove 8 of the two I-beam support beams 4 via the steel cable 9, so that the relative position between the pipe jacking machine 1 and / or pipeline 2 and the rail 3 is fixed.

[0042] Preferably, the sliding block 7 comprises a box-shaped steel block 71 , a steel cable fastener 72 and a steel ball 75 .

[0043] The box-shaped steel block 71 is a double-box single-chamber steel block with outwardly extending flanges on both sides. The ends of the flanges are provided with semicircular grooves 74 , and the steel balls 75 are installed in the semicircular grooves 74 .

[0044] The outwardly extending flanges on both sides of the box-shaped steel block 71 are clamped in the slide groove 8 and move under the action of the steel ball 75. The steel cable fastener 72 is fixed to the surface of the box-shaped steel block 71.

[0045] Preferably, the steel cable 9 is fixed to the box-shaped steel block 71 via a steel cable fastener 72. Further, the steel cable fastener 72 is fixed to the surface of the box-shaped steel block 71 via a bolt 73.

[0046] Preferably, the steel cable 9 is formed by winding two steel strands 91 , each steel strand 91 has a ring-shaped end, and the steel strand 91 is sleeved on the steel cable 9 fastener 72 ; the two steel strands 91 are fixed at the end of the steel cable 9 by a steel sheet 92 .

[0047] Example 2

[0048] On the basis of Example 1, this example further discloses a jacking method for mechanical pipe jacking in hard formations. The jacking method adopts the jacking structure of Example 1.

[0049] The jacking method includes: fixing the steel cross beam 6 on the bottom plate of the jacking shaft, welding and installing the I-beam support beam on the steel cross beam 6, and installing the slide groove 8 and the sliding block 7 on the outer flange of the I-beam support beam, and then installing the steel rail 3 on the I-beam support beam, and finally connecting the sliding block 7 with the steel cable 9 to fix the jacking machine 1 and / or the pipeline 2. During the jacking process, the steel cable 9 automatically moves with the body of the jacking machine 1 and the pipeline 2 under the action of the sliding block 7.

[0050] By means of the jacking structure and / or jacking method of the mechanical jacking pipe in hard formations of the present invention, the jacking machine 1 and / or the pipe 2 (the first three sections are pipes fixedly connected to the jacking machine) are reinforced when the mechanical jacking pipe in hard formations is initially jacked, thereby avoiding severe vibration caused by the reaction force of the pebbles or rock layers on the cutting disc, ensuring the jacking quality of the pipe 2 and reducing the axis deviation.

[0051] At the same time, the application of slide groove and sliding block system reinforcement technology in the jacking guide structure can realize the automatic overall movement of the reinforcement system and the jacking machine or pipeline structure, and its vibration reduction effect is obvious. At the same time, it can avoid manual advancement, reduce labor, improve safety, improve construction efficiency, and save construction time and costs.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanical pipe jacking structure for hard formations, characterized in that: The jacking structure comprises: a pipe jacking machine (1), a pipe (2), a steel rail (3), an I-beam support beam (4), a steel cross beam (6), a sliding block (7), a chute (8), a steel cable (9) and a jack; Each steel cross beam (6) is laid in parallel on the bottom plate of the top pipe working pit, and two I-beam support beams (4) are laid in parallel on each steel cross beam (6); The outer flanges of the two steel beams (6) are respectively provided with slide grooves (8), and a plurality of sliding blocks (7) are clamped in the slide grooves (8) of the outer flanges of the steel beams (6); The steel rail (3) is arranged above the I-beam support beam (4), the pipe jacking machine (1) and the pipeline (2) are arranged above the steel rail (3), and the jack is arranged at the ends of the pipe jacking machine (1) and the pipeline (2) to complete the jacking of the pipe jacking machine (1) and the pipeline (2); The pipe jacking machine (1) and the pipeline (2) are movably fixed to the sliding blocks (7) in the outer sliding grooves (8) of the two I-beam support beams (4) via steel cables (9), so that the relative positions of the pipe jacking machine (1) and the pipeline (2) and the steel rails (3) are fixed; The two I-shaped steel support beams (4) are connected and fixed to the steel cross beam (6) via steel angle braces (5); The slide grooves (8) are distributed on the upper and lower outer flanges of the I-beam support beam (4), and each of the upper and lower flanges has two slide grooves (8).

2. The jacking structure according to claim 1, characterized in that: Each chute (8) is formed by welding two long steel plates (81) to a flange, and a rectangular stopper (83) is provided at the end of the chute (8) for blocking.

3. The jacking structure according to claim 2, characterized in that: A triangular steel plate (82) is welded to the outside of the slide groove (8) at intervals of 30 cm to complete the reinforcement between the long steel plate (81) and the I-beam support beam (4).

4. The jacking structure according to claim 1, characterized in that: The sliding block (7) comprises a box-shaped steel block (71), a steel cable fastener (72) and a steel ball (75); The box-shaped steel block (71) is a double-box single-chamber steel block with outwardly extending flanges on both sides, and the ends of the flanges are provided with semicircular grooves (74), and the steel balls (75) are installed in the semicircular grooves (74); the outwardly extending flanges on both sides of the box-shaped steel block (71) are clamped in the slide grooves (8) and move under the action of the steel balls (75); The steel cable fastener (72) is fixed to the surface of the box-shaped steel block (71).

5. The jacking structure according to claim 4, characterized in that: The steel cable (9) is fixed to the box-shaped steel block (71) via a steel cable fastener (72).

6. The jacking structure according to claim 5, characterized in that: The steel cable fastener (72) is fixed to the surface of the box-shaped steel block (71) via bolts (73).

7. The jacking structure according to claim 5, characterized in that: The steel cable (9) is formed by winding two steel strands (91), each steel strand (91) has a ring-shaped end, and the steel strand (91) is sleeved on the steel cable fastener (72); The ends of the steel cable (9) are fixed with steel sheets (92) to fix the two steel strands (91).

8. A method for mechanical pipe jacking in hard formations, the method adopting the jacking structure according to any one of claims 1 to 7, characterized in that: The jacking method comprises: The steel cross beam (6) is fixedly mounted on the bottom plate of the jacking well, the I-beam support beam (4) is welded and mounted on the steel cross beam (6), and the slide groove (8) and the sliding block (7) are mounted on the outer flange of the I-beam support beam (4). Then, a steel rail (3) is installed on the I-beam support beam (4), and finally, a steel cable (9) is used to connect the sliding block (7) to fix the pipe jacking machine (1) and the pipeline (2). During the jacking process, the steel cable (9) automatically moves along with the pipe jacking machine (1) and the pipeline (2) under the action of the sliding block (7).

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