CN114320313A - Air-pushing dragging type pipe jacking machine escaping construction method - Google Patents
Air-pushing dragging type pipe jacking machine escaping construction method Download PDFInfo
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- CN114320313A CN114320313A CN202210024415.7A CN202210024415A CN114320313A CN 114320313 A CN114320313 A CN 114320313A CN 202210024415 A CN202210024415 A CN 202210024415A CN 114320313 A CN114320313 A CN 114320313A
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- 238000010276 construction Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 claims abstract description 17
- 210000001503 joint Anatomy 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 33
- 239000010959 steel Substances 0.000 claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 239000002002 slurry Substances 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 5
- 230000000916 dilatatory effect Effects 0.000 claims description 2
- 230000005641 tunneling Effects 0.000 description 8
- 239000011435 rock Substances 0.000 description 6
- 238000005422 blasting Methods 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 4
- 230000032258 transport Effects 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 239000010438 granite Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The invention belongs to the field of pipe jacking construction, and particularly discloses a stranded-removal construction method of an air-pushing dragging type pipe jacking machine, which comprises the following steps: step 1: the No. 1 push bench is jacked from the No. 1 working well to the No. 2 receiving well; step 2: the No. 2 push bench pushes the No. 3 working well to the No. 2 receiving well; and step 3: the No. 3 push bench pushes the No. 3 working well from the No. 2 receiving well, so that the No. 3 push bench is in butt joint with the No. 2 push bench; and 4, step 4: removing the No. 3 pipe jacking device and the edge scraper, and installing a dragging device in the No. 2 receiving well; and 5: the dragging device reversely drags the pipe pushed in by the No. 3 pipe pushing machine out of the hole, and the No. 2 pipe pushing machine pushes the pipe to the No. 2 receiving well; step 6: no. 3 push bench and No. 2 push bench are respectively lifted out of the ground from No. 2 receiving well. The pipe is dragged out from the No. 2 receiving well section by adopting a dragging method, and the No. 2 pipe jacking machine pushes the jacking pipe into the No. 3 working well from the air, so that the difficult problem that the pipe jacking machine is difficult to get rid of difficulties in pipe jacking construction due to different engineering geology and special conditions is solved.
Description
Technical Field
The invention belongs to the technical field of pipe jacking construction, and particularly relates to a stranded-removal construction method of an air-pushing dragging type pipe jacking machine.
Background
The pipe-jacking construction is a construction method of underground pipelines developed after shield construction, does not need to excavate a surface layer, and can pass through highways, railways, rivers, ground buildings, underground structures, various underground pipelines and the like. In the pipe jacking construction, by means of the thrust of a main jacking oil cylinder, an inter-pipeline relay and the like, a tool pipe or a heading machine is pushed from a working well through a soil layer until the tool pipe or the heading machine is hoisted in a receiving well. Meanwhile, the pipeline following the tool pipe or the heading machine is buried between the two wells, so that the construction method for laying the underground pipeline without excavating is realized. Its advantages are no or little influence to ambient environment, small construction area and low noise. But also can go deep into the underground operation, and has incomparable advantages compared with excavating and burying pipes.
Generally, the same pipe jacking machine is adopted for jacking two adjacent jacking sections in a pipe jacking project, namely the same pipe jacking machine jacks to one jacking section and then turns to jack to the other jacking section, when the pipe jacking machine jacks to a certain position, the engineering geological condition changes suddenly, the granite is weathered slightly on the full section, the rock stratum is hard and complete, the core pulling test is carried out on the excavation face after the cabin is opened, the axial compression strength reaches 156-170 MP, and the granite belongs to hard rock. The pipe jacking is stopped, the pipe jacking project is interrupted, and the pipe jacking machine cannot jack. The prior art is as follows: firstly, a vertical shaft with the size larger than the external dimension of the pipe jacking machine is excavated from the ground, then the pipe jacking machine is hoisted out from the vertical shaft, and other construction methods are adopted for tunneling. The investment of hundreds or tens of millions of dollars needs to be increased, the construction period is long, the safety risk is high, and the influence on the environment is large; secondly, a circular section larger than the diameter of a cutter head of the pipe jacking machine is dug by a drilling and blasting method, the pipe jacking machine is lifted out of the ground after being idle-pushed to a corresponding working well, secondary reinforced concrete lining or primary lining is carried out on a tunneling section, and then the pipe is installed by the pipe jacking machine in an idle-pushing mode, so that initiating explosive work is needed for blasting, buildings in the ground area where blasting is forbidden can be damaged, the safety risk is high, the influence of vibration and noise on the surrounding social environment is large, the construction condition in a hole is severe, the investment increase is large, and the construction period is prolonged; thirdly, adopting static explosion plus machinery (rock drill,
Water-mill drill, rope saw, etc.) and then secondary reinforced concrete lining is carried out on the tunneling section, or the tunneling section is initially lined with reinforced concrete
The pipe is installed by air pushing of the pipe jacking machine after lining, the investment increase is large, the construction speed is low, and the construction period is prolonged more.
Therefore, the inventor has endeavored to design a pipe jacking engineering construction method to solve the above problems.
Disclosure of Invention
The invention aims to: the air-push dragging type pipe jacking machine escaping construction method is suitable for various engineering geological conditions and circular sections with different diameters, solves the difficult problem that the pipe jacking machine escapes under special conditions in pipe jacking construction, and is suitable for escaping the pipe jacking machine in areas without construction conditions of a drilling shaft and a mining method (including a drilling and blasting method, a static blasting method and a mechanical tunneling method).
In order to achieve the purpose, the invention adopts a technical scheme that:
an air-pushing dragging type pipe jacking machine escaping construction method comprises the following steps:
step 1: the No. 1 pipe jacking machine jacks into the No. 2 receiving well from the No. 1 working well, so that the No. 1 working well is communicated with the No. 2 receiving well;
step 2: the No. 2 push pipe machine pushes in from the No. 3 working well to the No. 2 receiving well;
and step 3: the No. 3 push bench pushes towards the No. 3 working well from the No. 2 receiving well until the No. 3 push bench is in butt joint with the No. 2 push bench;
and 4, step 4: removing a No. 3 pipe jacking device and an edge scraper of a No. 3 pipe jacking machine, and installing a dragging device on the wall of the opposite foundation pit of the No. 2 receiving well;
and 5: the dragging device reversely drags the No. 3 pipe pushed by the No. 3 pipe pushing machine out of the hole, and the No. 2 pipe pushing machine pushes the No. 2 receiving well in an empty mode;
step 6: no. 3 push bench is dilatory, No. 2 push bench is empty to be pushed out of the hole and is hoisted out of ground from No. 2 receiving well respectively, makes No. 3 work well and No. 2 receiving well communicate.
As an innovation of the air-push dragging type pipe jacking machine escaping construction method, in the step 2, the No. 3 pipe jacking machine adopts a mud-water air pressure balance combined type pipe jacking machine construction process to jack in the direction of the No. 3 working well from the No. 2 receiving well.
As an innovation of the air-pushing dragging type pipe jacking machine escaping construction method, the construction process of the mud-water air pressure balance composite pipe jacking machine comprises the following steps: firstly, the grouting equipment, the tunnel door seal, the guide rail, the rear backrest and the main top are installed, and a No. 3 push bench pushes mud and water in a No. 2 receiving well in a balanced manner, and dynamically adjusts the pushing parameters, the slurry ratio and the grouting amount.
As an innovation of the air-pushing dragging type pipe jacking machine escaping construction method, the step 5 specifically comprises the following steps: dragging device is with No. 3 tubular products that No. 3 push-bench pushed in backward dragging out of the hole section by section, and haulage vehicle will drag No. 3 tubular products that go out of the hole and transport to No. 3 working wells, and No. 2 push-benches will not only push in No. 3 tubular products to No. 2 receiving well direction circulation sky propulsion No. 3 tubular products.
As an innovation of the air-push dragging type push bench escaping construction method, the dragging device comprises a dragging bracket, a dragging jack and a steel wire rope, wherein the dragging bracket is fixed on the side wall of the No. 2 receiving well close to the No. 3 pipe, the dragging jack is arranged on the dragging bracket, and the push-out end of the dragging jack is connected with the first No. 3 pipe pushed in by the No. 3 push bench through the steel wire rope.
As an innovation of the air-pushing dragging type pipe jacking machine escaping construction method, the dragging bracket is formed by reversely installing a jacking bracket of a No. 3 pipe jacking machine, and the dragging jack is formed by reversely installing a jacking jack of a No. 3 pipe jacking machine on the dragging bracket.
As an innovation of the air-pushing dragging type pipe jacking machine escaping construction method, a plurality of cross-arranged cross bars are arranged at the pushing end of the dragging jack, one end of the steel wire rope is connected with the cross bars, and the other end of the steel wire rope is connected with a pull ring corresponding to the No. 3 pipe.
As an innovation of the air-push dragging type push bench escaping construction method, in the step 5, the reverse dragging distance of the No. 3 pipe is equal to the air-push jacking distance of the No. 2 push bench, and the single reverse dragging distance of the No. 3 pipe is 0.5-0.8 m.
As an innovation of the air-push dragging type push bench escaping construction method, the length of the No. 3 pipe is 2.0-2.5 m, and the No. 1 push bench, the No. 2 push bench and the No. 3 push bench are all mud-water air pressure balance combined push benches.
As an innovation of the air-pushing dragging type pipe jacking machine escaping construction method, the step 6 specifically comprises the following steps: dragging the No. 3 push bench from the No. 2 receiving well through the dragging device, lifting out of the hole and out of the ground, pushing the No. 2 push bench in the air to the No. 2 receiving well, lifting out of the hole and out of the ground, and enabling the No. 3 working well to be communicated with the No. 2 receiving well.
Compared with the prior art, the air-push-pull type pipe jacking machine escaping construction method disclosed by the invention has the advantages that the 3 # pipe jacking machine is used for jacking from the 2 # receiving well to the 3 # working well and is butted with the trapped 2 # pipe jacking machine, the 3 # pipe jacking pipe material is dragged out section by section from the 2 # receiving well by adopting a dragging method, and the 2 # pipe jacking machine is used for carrying out air-push type pipe jacking from the 3 # working well section by section to install the pipe.
Description of the drawings:
FIG. 1 is a schematic diagram of the pipe jacking process of the present invention;
FIG. 2 is a schematic illustration of the invention from a receiving well No. 2 to a working well No. 3;
FIG. 3 is a schematic left view structure of a receiving well No. 2, a pipe jacking device No. 3 and a pipe jacking machine No. 3 of the present invention;
FIG. 4 is a schematic view of the structure of receiving well No. 2, pipe jacking device No. 3 and pipe jacking machine No. 3 of the present invention;
FIG. 5 is a schematic left view of the structure of the receiving well No. 2, the towing device and the push bench No. 3 of the present invention;
FIG. 6 is a schematic view of the front view structure of the receiving well No. 2, the dragging device and the push bench No. 3 of the present invention;
FIG. 7 is a flow chart of the pipe jacking construction process of the muddy water air pressure balance combined type pipe jacking machine of the invention;
FIG. 8 is a flow chart of the air-pushing dragging type pipe jacking construction process of the invention.
Illustration of the drawings:
1. a working well No. 1; 2. no. 1 pipe jacking device; 21. no. 1 tubing; 3. receiving well No. 2; 4. a working well No. 3; 5. no. 2 pipe jacking device; 51. no. 2 tubing; 6. no. 3 pipe jacking device; 61. a No. 3 tubing; 611. a pull ring; 62. a rear backrest; 63. jacking the bracket; 64. jacking a jack; 641. a steel collar; 65. no. 3 push bench; 66. a guide rail; 7. a hole outlet; 8. a pulling device; 81. a towing bracket; 811. a cross-iron joist; 812. a cross-iron beam; 813. a cross-iron vertical beam; 82. dragging a jack; 83. a steel cord.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are for reference and illustration only and are not to be construed as limiting the scope of the invention.
Referring to fig. 1 to 8, an air-push dragging type pipe jacking machine escaping construction method is based on a project section formed by a No. 1 working well 1, a No. 2 receiving well 3, a No. 3 working well 4, a hole outlet 7 and four, the No. 1 working well 1, the No. 2 receiving well 3, the No. 3 working well 4 and the hole outlet 7 are sequentially arranged at intervals to form three sections of projects, under normal conditions, the No. 1 pipe jacking machine is jacked into the No. 2 receiving well 3 from the No. 1 working well 1, the No. 2 pipe jacking machine is jacked into the No. 2 receiving well 3, the No. 1 working well 1, the No. 2 receiving well 3 and the No. 3 working well 4 are communicated, then the No. 2 pipe jacking machine is jacked into the hole outlet 7 from the No. 3 working well 4 reversely, the No. 3 working well 4 is communicated with the hole outlet 7, when the geological mutation of the condition on the project section between the No. 2 receiving well 3 and the No. 3 working well 4 is a complete hard rock stratum, the No. 2 machine is trapped, the air-pushing dragging type pipe jacking machine escaping construction method comprises the following steps:
step 1: the No. 1 pipe jacking machine jacks the No. 1 pipe 21 from the No. 1 working well 1 to the No. 2 receiving well 3, so that the No. 1 working well 1 and the No. 2 receiving well 3 are communicated through multiple sections of the No. 1 pipe 21;
step 2: the No. 2 pipe pushing machine pushes the No. 2 pipe 51 from the No. 3 working well 4 to the No. 2 receiving well 3;
and step 3: the No. 3 pipe pushing machine 65 pushes the No. 3 pipe 61 from the No. 2 receiving well 3 to the No. 3 working well 4 until the No. 3 pipe pushing machine 65 is in butt joint with the No. 2 pipe pushing machine;
and 4, step 4: dismantling a No. 3 pipe jacking device 6 and 6 edge scrapers of a No. 3 pipe jacking machine, and installing a dragging device 8 on the wall of the opposite foundation pit of the No. 2 receiving well 3;
and 5: the dragging device 8 reversely drags the No. 3 pipe 61 pushed by the No. 3 pipe pushing machine 65 out of the hole section by section, the transport vehicle transports the No. 3 pipe 61 dragged out of the hole to the No. 3 working well 4, and the No. 2 pipe pushing machine circularly pushes the No. 3 pipe 61 in the direction of the No. 2 receiving well 3 in an empty mode;
step 6: no. 3 push bench 65 pulls, No. 2 push bench air-pushes and respectively goes out of the hole and hangs out of the ground from No. 2 receiving well 3, makes No. 3 working well 4 and No. 2 receiving well 3 communicate, backfill slip casting (cement paste or cement mortar).
In the step 2, the No. 3 push bench 65 and the No. 2 push bench both adopt a mud-water air pressure balance composite push bench construction process. The No. 2 pipe jacking machine and the No. 2 pipe jacking device are jacked from the No. 3 working well 4 to the No. 2 receiving well 3; no. 3 push bench and No. 3 push bench device 6 are pushed into the working well 4 from No. 2 receiving well 3 to be in butt joint with the trapped No. 2 push bench.
Referring to fig. 7, the construction process of the mud-water air pressure balance combined push bench comprises the following steps: firstly, grouting equipment, tunnel door sealing, a guide rail 66, a back backrest 62, a main jacking pipeline and a cable are installed, a No. 3 push bench 65 is debugged online, after the No. 3 push bench 65 is in place in a No. 2 receiving well 3, the push bench is jacked in a mud-water balance mode, jacking parameters are dynamically adjusted, settlement monitoring is carried out, slurry proportion and grouting amount are adjusted, and if the requirements are met, the No. 3 push bench 65 is jacked continuously. And simultaneously, slag tapping is monitored, and if the requirement is not met, jacking parameters, slurry proportion and grouting amount are adjusted.
In the invention, the No. 3 pipe 61 is a special pipe joint (embedded pull ring 611) with DN3000 length of 2.0-2.5 m, the pull ring 611 adopts HPB300 steel bars, and the diameter of the steel bars is 32 mm.
In the invention, the No. 1 pipe jacking device 2 is a jacking driving part of the No. 1 pipe jacking machine, the No. 2 pipe jacking device 5 is a jacking driving part of the No. 2 pipe jacking machine, and the No. 3 pipe jacking device 6 is a jacking driving part of the No. 3 pipe jacking machine 65. The No. 3 pipe jacking device 6 (fig. 3 and 4) includes a back backrest 62, a guide rail 66, a jacking bracket 63, and six 200T jacking jacks 64, the back backrest 62 is fixed on the side wall of the No. 2 receiving well 3, the guide rail 66 and the jacking bracket 63 are fixed in the No. 2 receiving well 3, the six jacking jacks 64 are mounted on the jacking bracket 63, the jacking picks of the six jacking jacks 64 are fixed on the back backrest 62, the output ends of the six jacking jacks 64 are provided with steel lantern rings 641, the steel lantern rings 641 are slidably disposed on the guide rail 66, the six jacking jacks 64 synchronously drive the steel lantern rings 641 to slide forward on the guide rail 66, so as to push the No. 3 pipe 61 to jack, the structures of the No. 1 pipe jacking device 2 and the No. 2 pipe jacking device 5 are the same as those of the No. 3 pipe jacking device 6, and are not described herein.
No. 1, No. 2 and No. 3 push bench 65 are all mud-water air pressure balance combined push benches. The mud-water air pressure balance combined push bench mainly comprises a cutting and crushing system, a driving system, a deviation rectifying and hydraulic system,
The device comprises a shell, a built-in mud feeding and discharging system, a measuring and displaying system, an electric operating system and other auxiliary equipment.
The working principle is as follows: with the propelling of the tool pipe, the cutter head continuously rotates, the mud inlet pipe continuously supplies mud water, and the mud discharge pipe
And continuously discharging the muddy water mixed with the muck out of the muddy water cabin. The mud chamber is kept at a certain pressure to ensure that the cutter head is in mud
And (4) tunneling forwards under the condition of water pressure. The basic principle of the mud-water balance tool pipe is that the mud-water type protection wall is used for protecting the mud-water type
In the pipe-jacking construction, in order to keep the excavation surface stable, slurry of a certain pressure must be injected into the slurry tank. Slurry composition
And permeating into the soil body under the action of pressure to form a layer of mud skin on the excavation surface. The function of the mud skin, on the one hand
Prevent the muddy water from continuously leaking into the soil body, and on the other hand, the pressure of the muddy water acts on the excavation surface through the mud skin
Preventing collapse. And simultaneously plays roles of lubricating and cooling. At present, different sections, different tunneling modes and different adaptations are not available
Various types of push bench under the same engineering geological conditions can be customized or directly purchased by manufacturers, various types commonly used in the field can be selected, and as the 3 # push bench 65 needs to dig hard rocks, a cutter head and a cutter of the 3 # push bench 65 are reinforced, in order to pull out the 3 # push bench 65, a group of steel wire ropes is arranged on a lifting ring of the 3 # push bench, and the 3 # push bench 65 can be smoothly pulled out of the hole.
In the step 4, the whole No. 3 pipe jacking device 6 and 6 edge scrapers need to be removed, jacking jack, mud pipe and tunnel door sealing are all the auxiliary facilities of the No. 3 pipe jacking device 6, after the auxiliary facilities are removed, a ventilation system and an electric power system need to be reserved, the No. 3 pipe jacking machine 65 is provided with 6 edge scrapers, the 6 edge scrapers need to be removed in a stable and water-seepage-free or weak water-permeable section of a rock mass, in order to enable the No. 3 pipe jacking machine 65 to have sufficient dragging force, 2 dragging jack picks of 180T-220T need to be respectively arranged on two sides of the No. 3 pipe 61, the 200T dragging jack is preferably selected in the embodiment, the No. 2 receiving well 3 is used as a back wall of a jack, and the No. 3 pipe jacking machine 65 needs to drag the No. 3 pipe 61, so that the No. 3 pipe jacking device 6 needs to be provided with a dragging device 8, and the dragging device 8 comprises a dragging bracket 81, four dragging jacks 82, and a mud pipe jacking device and a hole, The dragging bracket 81 is fixed on the side wall of the No. 3 receiving well 3 close to the No. 3 pipe 61, the dragging jack 82 is arranged on the dragging bracket 81, the base of the jack 82 is tightly connected with the foundation pit wall of the No. 2 receiving well 3 in a propping manner, the two groups of steel wire ropes 83 are connected with the dragging bracket cross bar 813, and the front ends of the two groups of steel wire ropes are connected with the No. 3 pipe pushing machine 65 and the pushed-in No. 3 pipe 61 section by section through the steel wire ropes 83.
In order to save cost and accelerate the progress of the project, in this embodiment, the dragging bracket 81 is formed by reversely installing the jacking bracket 63 of the No. 3 pipe pushing jack 65, meanwhile, the dragging jack 82 is formed by reversely installing the jacking jack 64 of the No. 3 pipe pushing jack 65 on the dragging bracket 81, the dragging end of the dragging jack 82 is provided with a plurality of cross-arranged cross bars, the cross bars are all made of 40 h-shaped steel, the cross bars are specifically two horizontally arranged cross bar beams 812 and two vertically arranged cross bar beams 813, the two cross bar beams 813 and the two cross bar beams 812 are fixed on the four dragging jacks 82 in a vertically and horizontally crossed manner, two groups of cross bar beams 811 are fixed on the two cross bar beams 813 at intervals, the two cross bar beams are slidably arranged on the four cross bar beams 811, the number of steel wire ropes 83 is specifically four, one end of the steel wire rope 83 is connected and fixed with the cross bar beams 812, and the other end of the steel wire rope 83 is connected with 611 on the corresponding No. 3 pipe 61 and the pull ring of the No. 3 pipe pushing jack The four 200t dragging jacks 82 are driven to drag together, the first section of the No. 3 pipe 61 is dragged through the steel wire rope 83 by the aid of the side wall reaction force of the No. 2 receiving well 3, the stroke of the jacks is 0.5-0.8 m, and then the No. 3 pipe pushing machine 65 is dragged to move outwards for 0.5-0.8 m, so that other No. 3 pipes 61 are gradually dragged outwards to exit the No. 2 receiving well 3.
In the invention, two groups of steel wire ropes 83 are used, one group of steel wire ropes 83 is used for dragging the third pipe 61, the other group of steel wire ropes is used for dragging the No. 3 pipe jacking machine 65, the two groups of steel wire ropes adopt 6 x 37 wires, the diameter of each steel wire rope is 40mm-45mm, the diameter of the steel wire rope is preferably phi 43mm in the embodiment, the nominal tensile strength of the steel wire rope is 1500N/mm2-1600N/mm2, the nominal tensile strength of the steel wire rope is 1550N/mm2 in the embodiment, and the total section area of the steel wire rope is 697.08mm 2.
Referring to fig. 8, in step 5, the distance of the reverse dragging of the No. 3 pipe 61 is equal to the distance of the idle pushing and jacking of the No. 2 pipe pushing machine, the distance of the single reverse dragging of the No. 3 pipe 61 is 0.5m to 0.8m, the No. 2 pipe pushing machine also pushes 0.5m to 0.8m along with the empty pushing of the No. 3 pipe 61, in this embodiment, the distance of the first reverse dragging of the No. 3 pipe 61 is preferably 0.5m, the No. 2 pipe pushing machine also pushes 0.5m along with the empty pushing of the No. 3 pipe 61, after the dragging and jacking pick is started, the pipe is slowly dragged at a normal speed after the contact parts are tightly closed, if the first No. 3 pipe 61 drags 0.5m, the pipe is returned, the pipe withdrawing device and the pipe connecting fastener are removed, the fastener is installed to the second No. 3 pipe 61, the No. 3 pipe pushing machine is dragged again by 0.5m, and the No. 2 machine is pushed by 0.5m, and the repeated circular dragging and idle pushing are repeated. After dragging a section of No. 3 pipe 61 of 2.0 m-2.5 m out of the No. 2 receiving well 3, the dragged-out No. 3 pipe 61 is lifted out of the No. 2 receiving well 3 by a crane, the pipe is transported to the No. 3 working well 4 by a transport vehicle, the No. 2 pipe jacking machine carries out air jacking installation, the repeated circulation is carried out, and the residual pipe is installed in the air jacking installation.
The air-push-pull type pipe jacking machine escaping construction method comprises the steps of firstly utilizing a No. 3 pipe jacking machine 65 to jack in a No. 2 receiving well 3 to a No. 3 working well 4, installing a pipe and butting the pipe with a trapped No. 2 pipe jacking machine, then adopting a dragging method to drag a No. 3 pipe 61 out of the No. 2 receiving well 3 section by section, pushing the pipe in the No. 2 pipe jacking machine section by section from a No. 3 working well 4 section by section, and completing hard lithologic section tunneling.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.
Claims (10)
1. An air-push dragging type pipe jacking machine escaping construction method is characterized by comprising the following steps:
step 1: the No. 1 pipe jacking machine jacks into the No. 2 receiving well from the No. 1 working well, so that the No. 1 working well is communicated with the No. 2 receiving well;
step 2: the No. 2 push pipe machine pushes in from the No. 3 working well to the No. 2 receiving well;
and step 3: the No. 3 push bench pushes towards the No. 3 working well from the No. 2 receiving well until the No. 3 push bench is in butt joint with the No. 2 push bench;
and 4, step 4: removing a No. 3 pipe jacking device and an edge scraper of a No. 3 pipe jacking machine, and installing a dragging device on the wall of the opposite foundation pit of the No. 2 receiving well;
and 5: the dragging device reversely drags the No. 3 pipe pushed by the No. 3 pipe pushing machine out of the hole, and the No. 2 pipe pushing machine pushes the No. 2 receiving well in an empty mode;
step 6: no. 3 push bench is dilatory, No. 2 push bench is empty to be pushed out of the hole and is hoisted out of ground from No. 2 receiving well respectively, makes No. 3 work well and No. 2 receiving well communicate.
2. The air-push-pull type push bench escaping construction method as claimed in claim 1, wherein in step 2, the No. 3 push bench adopts a mud-water air pressure balance composite push bench construction process to jack from the No. 2 receiving well to the No. 3 working well.
3. The air-pushing dragging type push bench escaping construction method as claimed in claim 2, wherein the mud-water air pressure balance composite push bench construction process is as follows: firstly, the grouting equipment, the tunnel door seal, the guide rail, the rear backrest and the main top are installed, and a No. 3 push bench pushes mud and water in a No. 2 receiving well in a balanced manner, and dynamically adjusts the pushing parameters, the slurry ratio and the grouting amount.
4. The air-pushing dragging type pipe jacking machine escaping construction method according to claim 1, wherein the step 5 specifically comprises the following steps: dragging device is with No. 3 tubular products that No. 3 push-bench pushed in backward dragging out of the hole section by section, and haulage vehicle will drag No. 3 tubular products that go out of the hole and transport to No. 3 working wells, and No. 2 push-benches will not only push in No. 3 tubular products to No. 2 receiving well direction circulation sky propulsion No. 3 tubular products.
5. The air-pushing-pulling type pipe jacking machine escaping construction method according to claim 1 or 4, wherein the pulling device comprises a pulling bracket, a pulling jack and a steel wire rope, the pulling bracket is fixed on the side wall of the No. 2 receiving well close to the No. 3 pipe, the pulling jack is arranged on the pulling bracket, and the pushing end of the pulling jack is connected with the first No. 3 pipe pushed in by the No. 3 pipe jacking machine through the steel wire rope.
6. The air-pushing dragging type pipe jacking machine escaping construction method according to claim 5, wherein the dragging bracket is formed by reversely installing a jacking bracket of a No. 3 pipe jacking machine, and the dragging jack is formed by reversely installing a jacking jack of a No. 3 pipe jacking machine on the dragging bracket.
7. The air-pushing dragging type pipe jacking machine escaping construction method according to claim 6, wherein a plurality of cross-arranged cross bars are arranged at the pushing end of the dragging jack, one end of the steel wire rope is connected with the cross bars, and the other end of the steel wire rope is connected with a pull ring corresponding to the No. 3 pipe.
8. The air-push-pull type push bench escaping construction method as claimed in claim 1, wherein in the step 5, the distance of reverse dragging of the No. 3 pipe is equal to the distance of air-push jacking of the No. 2 push bench, and the distance of single reverse dragging of the No. 3 pipe is 0.5 m-0.8 m.
9. The air-push dragging type push bench escaping construction method according to claim 1, characterized in that the length of the No. 3 pipe is 2.0-2.5 m, and the No. 1 push bench, the No. 2 push bench and the No. 3 push bench are all mud-water air pressure balance composite push benches.
10. The air-pushing dragging type pipe jacking machine escaping construction method according to claim 1, wherein the step 6 specifically comprises the following steps: dragging the No. 3 push bench from the No. 2 receiving well through the dragging device, lifting out of the hole and out of the ground, pushing the No. 2 push bench in the air to the No. 2 receiving well, lifting out of the hole and out of the ground, and enabling the No. 3 working well to be communicated with the No. 2 receiving well.
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| CN115143318A (en) * | 2022-06-23 | 2022-10-04 | 中国五冶集团有限公司 | Treatment method for incapability of drilling of jacking pipe in sand gravel layer jacking pipe construction process |
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