CN114320313B - Air-pushing traction type push bench escaping construction method - Google Patents
Air-pushing traction type push bench escaping construction method Download PDFInfo
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- CN114320313B CN114320313B CN202210024415.7A CN202210024415A CN114320313B CN 114320313 B CN114320313 B CN 114320313B CN 202210024415 A CN202210024415 A CN 202210024415A CN 114320313 B CN114320313 B CN 114320313B
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- 238000010276 construction Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 claims abstract description 29
- 210000001503 joint Anatomy 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 29
- 239000010959 steel Substances 0.000 claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000002002 slurry Substances 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 230000032258 transport Effects 0.000 claims description 7
- 235000000396 iron Nutrition 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 2
- 230000005641 tunneling Effects 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000011435 rock Substances 0.000 description 7
- 238000004880 explosion Methods 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005553 drilling Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000004215 skin function Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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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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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention belongs to the field of pipe jacking construction, and particularly discloses a method for escaping from the air pushing and pulling type pipe jacking machine, which comprises the following steps: step 1: self-1 work of push bench No. 1 jacking the well to a No. 2 receiving well; step 2: jacking the No. 2 push bench from the No. 3 working well to the No. 2 receiving well; step 3: jacking the No. 3 push bench from the No. 2 receiving well to the No. 3 working well, so that the No. 3 push bench is in butt joint with the No. 2 push bench; step 4: dismantling the No. 3 pipe jacking device and the edge scraper, and installing a dragging device in a No. 2 receiving well; step 5: the dragging device reversely drags the pipe jacked by the No. 3 pipe jacking machine to go out of the hole, and the No. 2 pipe jacking machine pushes the pipe jacked by the No. 2 receiving well; step 6: and the No. 3 push bench and the No. 2 push bench are respectively hung from the No. 2 receiving well to the ground. According to the invention, a pulling method is adopted to pull out the pipe section by section from the No. 2 receiving well, and the No. 2 pipe jacking machine pushes the pipe from the No. 3 working well, so that the difficult problem that the pipe jacking machine gets rid of the trouble in the 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 method for escaping construction of an empty pushing and pulling type pipe jacking machine.
Background
The pipe-jacking construction is a construction method of an underground pipeline developed after the shield construction, which does not need to excavate a surface layer and can pass through roads, railways, rivers, ground buildings, underground structures, various underground pipelines and the like. The pipe jacking construction is to push the tool pipe or the heading machine from the working well to the receiving well through the soil layer by means of the thrust of the main top oil cylinder, the relay between the pipelines and the like. Meanwhile, the pipeline following the tool pipe or the heading machine is buried between two wells, so that the construction method for laying the underground pipeline in a non-excavation mode is realized. Its advantages are no influence to surrounding environment, less influence to construction field and low noise. But also can go deep into underground operation, and has the advantage that the excavation of buried pipes is incomparable.
In general, two adjacent jacking sections in pipe jacking engineering adopt the same pipe jacking machine to jack, namely, after the same pipe jacking machine jacks one jacking section, the jacking machine is turned to jack the other jacking section, when the pipe jacking machine jacks a certain position, engineering geological conditions are suddenly changed, the pipe jacking machine is full-section breeze granite, rock stratum is hard and complete, and the axial compressive strength reaches 156-170 MP in a core pulling test of a tunneling surface, and the pipe jacking machine belongs to hard rock. The pipe jacking tunneling is stopped, the pipe jacking engineering is interrupted, and the pipe jacking machine cannot jack in. The prior art comprises the following steps: firstly, a vertical shaft larger than the external dimension of the push bench is excavated from the ground, then the push bench is lifted out from the vertical shaft, and other construction methods are adopted for tunneling. The investment of hundreds or tens of millions of yuan is increased, the construction period is long, the safety risk is high, and the environmental impact is large; secondly, a drilling and blasting method is adopted to open a circular section larger than the diameter of a cutter head of the pipe jacking machine, the pipe jacking machine is lifted out of the ground after being empty pushed to a corresponding working well, then a tunneling section is subjected to secondary reinforced concrete lining or primary lining, then the pipe jacking machine is empty pushed to install pipes, a initiating explosive device is required to blast, buildings in a ground explosion-forbidden area are 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 bad, the investment is increased greatly, and the construction period is prolonged; thirdly, static explosion is adopted machinery (rock drill),
Equipment such as a water mill drill, a rope saw and the like) is matched with tunneling, then carrying out secondary reinforced concrete lining or primary lining on the tunneling section
The pipe is installed in the hollow pushing mode of the pipe jacking machine after lining, the investment is increased greatly, the construction speed is low, and the construction period is prolonged more.
Accordingly, the inventors have made an effort to design a pipe jacking construction method to solve the above-described problems.
Disclosure of Invention
The invention aims at: the method is suitable for various engineering geological conditions and circular sections with different diameters, solves the problem that the push bench is out of order in special situations in push bench construction, and is suitable for the push bench out of order in areas without the construction conditions of a cutting shaft and a mining method (including a drilling explosion method and a static explosion and mechanical tunneling method).
In order to achieve the above purpose, the invention adopts a technical scheme that:
a method for constructing a push bench by air pushing and pulling comprises the following steps:
step 1: jacking the No. 1 pipe jacking machine from a No. 1 working well to a No. 2 receiving well, so that the No. 1 working well is communicated with the No. 2 receiving well;
step 2: jacking the No. 2 push bench from the No. 3 working well to the No. 2 receiving well;
step 3: jacking the No. 3 push bench from the No. 2 receiving well to the No. 3 working well until the No. 3 push bench is in butt joint with the No. 2 push bench;
step 4: dismantling 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 a counter foundation pit of a No. 2 receiving well;
step 5: the dragging device drags the No. 3 pipe jacked by the No. 3 pipe jacking machine out of the hole in a reverse direction, and the No. 2 pipe jacking machine is jacked to the No. 2 receiving well in an empty pushing mode;
step 6: the No. 3 push bench is pulled and the No. 2 push bench is empty to be pushed and lifted out of the ground from the No. 2 receiving well, so that the No. 3 working well is communicated with the No. 2 receiving well.
In the step 2, the No. 3 push bench is jacked from the No. 2 receiving well to the No. 3 working well by adopting a muddy water air pressure balance composite push bench construction process.
As an innovation of the escape construction method of the air-pushing traction type push bench, the construction process of the muddy water air pressure balance composite push bench comprises the following steps: the grouting equipment, the tunnel portal seal, the guide rail, the back rest and the main roof are installed, the No. 3 pipe jacking machine jacks in the No. 2 receiving well in a mud-water balance mode, and jacking parameters, slurry proportion and grouting quantity are dynamically adjusted.
As an innovation of the escape construction method of the air-pushing traction type push bench, the step 5 specifically comprises the following steps: the dragging device drags the No. 3 pipe jacked by the No. 3 pipe jacking machine section by section in a reverse direction to make a hole, the transport vehicle transports the No. 3 pipe dragged to the No. 3 working well, and the No. 2 pipe jacking machine circularly pushes the No. 3 pipe to the No. 2 receiving well in a hollow pushing mode.
As an innovation of the escape construction method of the empty-pushing traction type pipe jacking machine, the traction device comprises a traction bracket, a traction jack and a steel wire rope, wherein the traction bracket is fixed on the side wall of a No. 2 receiving well, which is close to a No. 3 pipe, the traction jack is arranged on the traction bracket, and the push-out end of the traction jack is connected with a first No. 3 pipe jacked by the No. 3 pipe jacking machine through the steel wire rope.
As an innovation of the escape construction method of the empty-pushing traction type push bench, the traction bracket is formed by reversely installing the jacking bracket of the No. 3 push bench, and the traction jack is formed by reversely installing the jacking jack of the No. 3 push bench on the traction bracket.
As an innovation of the escape construction method of the empty pushing and pulling type pipe jacking machine, the pushing end of the pulling jack is provided with a plurality of cross irons which are arranged in a crossing way, one end of the steel wire rope is connected with the cross irons, and the other end of the steel wire rope is connected with the pull ring corresponding to the No. 3 pipe.
As an innovation of the escape construction method of the hollow pushing and pulling type pipe jacking machine, in the step 5, the reverse pulling distance of the No. 3 pipe is equal to the hollow pushing and jacking distance of the No. 2 pipe jacking machine, and the single reverse pulling distance of the No. 3 pipe is 0.5 m-0.8 m.
As an innovation of the escape construction method of the air-pushing traction type push bench, 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 bench.
As an innovation of the escape construction method of the air-pushing traction type push bench, the step 6 specifically comprises the following steps: the No. 3 push bench is pulled out of the receiving well No. 2 to be lifted out of the ground through the pulling device, and the No. 2 push bench is pushed out of the receiving well No. 2 to be lifted out of the ground, so that the No. 3 working well is communicated with the receiving well No. 2.
Compared with the prior art, the construction method for the air-pushing pull type pipe jacking machine to get rid of the trapping state of the pipe jacking machine has the advantages that the No. 3 pipe jacking machine is utilized to jack in from the No. 2 receiving well to the No. 3 working well, the No. 3 pipe jacking machine is abutted with the trapped No. 2 pipe jacking machine, the pipe jacking machine is adopted to jack out the pipe from the No. 2 receiving well section by section, the No. 2 pipe jacking machine is used to jack out the installed pipe from the No. 3 working well section by section, the construction method for the air-pushing pull type pipe jacking engineering is suitable for various engineering geological conditions and circular sections with different diameters, the difficult problem that the pipe jacking machine gets rid of the trapping state of special conditions in pipe jacking construction is solved, and the construction method for the area pipe jacking machine without the construction conditions of a drilling shaft and a mining method (including a drilling explosion method and a static explosion and a mechanical tunneling method) is suitable for getting rid of the trapping.
Drawing figures description:
FIG. 1 is a schematic illustration of jacking of a jacking pipe project of the present invention;
FIG. 2 is a schematic illustration of the jack-in of the receiving well No. 2 through working well No. 3 of the present invention;
FIG. 3 is a schematic diagram showing left-hand construction of a receiving well No. 2, a push bench No. 3 and a push bench No. 3 according to the present invention;
FIG. 4 is a schematic diagram showing the front view of a receiving well No. 2, a push bench No. 3 and a push bench No. 3 according to the present invention;
FIG. 5 is a schematic diagram of a left-hand construction of a receiving well No. 2, a tractor unit and a push bench No. 3 according to the present invention;
FIG. 6 is a schematic diagram showing the front view of a receiving well No. 2, a tractor and a push bench No. 3 according to the present invention;
FIG. 7 is a flow chart of the pipe jacking construction process of the muddy water air pressure balance composite pipe jacking machine;
fig. 8 is a flow chart of the construction process of the hollow pushing and pulling type pipe jacking of the invention.
Graphic representation of the drawings description:
1. a No. 1 working well; 2. a No. 1 pipe jacking device; 21. a pipe No. 1; 3. a No. 2 receiving well; 4. a No. 3 working well; 5. a No. 2 pipe jacking device; 51. a No. 2 pipe; 6. a No. 3 pipe jacking device; 61. a No. 3 pipe; 611. a pull ring; 62. a back rest; 63. jacking the bracket; 64. jacking a jack; 641. a steel collar; 65. a push bench No. 3; 66. a guide rail; 7. an outlet hole; 8. a pulling device; 81. a pulling bracket; 811. a cross iron joist; 812. a cross iron beam; 813. a horizontal iron vertical beam; 82. a drag jack; 83. steel wire a rope.
Detailed Description
Embodiments of the present invention will now be described in detail with reference to the drawings, which are intended to be used as references and illustrations only, and are not intended to limit the scope of the invention.
Referring to fig. 1 to 8, a method for constructing a push bench by pulling out a trapped object by air pushing is based on a working section formed by a working well 1, a receiving well 2, a working well 3, a working well 4 and a hole outlet 7, and a working section formed between the working well 1, the receiving well 2, the working well 3, the working well 4 and the hole outlet 7, which are sequentially arranged at intervals to form a three-section working section, normally, the push bench 1 is pushed up from the working well 1 to the receiving well 2, the push bench 2 is pushed up to the receiving well 2, the push bench 3, the method comprises the steps of enabling a No. 1 working well 1, a No. 2 receiving well 3 and a No. 3 working well 4 to be communicated, jacking a No. 2 push bench reversely from the No. 3 working well 4 to a hole outlet 7, enabling the No. 3 working well 4 to be communicated with the hole outlet 7, and when geological conditions on an engineering section between the No. 2 receiving well 3 and the No. 3 working well 4 are suddenly changed into a complete hard rock stratum, trapping the No. 2 push bench, wherein the method for constructing the air pushing and pulling push bench by escaping comprises the following steps:
step 1: the pipe jacking machine 1 jacks the pipe 21 from the working well 1 to the receiving well 32, so that the working well 1 and the receiving well 3 are communicated through a plurality of sections of the pipe 21 1;
step 2: the pipe jacking machine No. 2 jacks the pipe No. 2 51 from the working well No. 3 to the receiving well No. 2 in the direction of the receiving well No. 3;
step 3: the No. 3 pipe jacking machine 65 jacks the No. 3 pipe 61 from the No. 2 receiving well 3 to the No. 3 working well 4 until the No. 3 pipe jacking machine 65 is in butt joint with the No. 2 pipe jacking machine;
step 4: dismantling No. 3 pipe jacking devices 6 and 6 of a No. 3 pipe jacking machine, and installing a dragging device 8 on the wall of a counter foundation pit of a No. 2 receiving well 3;
step 5: the dragging device 8 drags the No. 3 pipe 61 jacked by the No. 3 pipe jacking machine 65 section by section in a reverse direction to make a hole, the transport vehicle transports the No. 3 pipe 61 dragged to make the hole to the No. 3 working well 4, and the No. 2 pipe jacking machine circularly and empty pushes the No. 3 pipe to jack the No. 3 pipe 61 towards the No. 2 receiving well 3;
step 6: the No. 3 push bench 65 is pulled and the No. 2 push bench is empty to push out and hang out from the No. 2 receiving well 3 respectively, so that the No. 3 working well 4 is communicated with the No. 2 receiving well 3, and the grouting (cement slurry or cement mortar) is refilled.
In the step 2, the No. 3 push bench 65 and the No. 2 push bench all adopt a slurry-air pressure balance composite push bench construction process. The push bench No. 2 and the push bench No. 2 push the push bench from the work well No. 4 to the receiving well No. 2 in the direction of 3; 3. and the No. 3 push bench are pushed from the No. 2 receiving well 3 to the direction of the working well 4 to be in butt joint with the trapped No. 2 push bench.
Referring to fig. 7, the construction process of the muddy water air pressure balance composite pipe jacking machine comprises the following steps: the grouting equipment, the tunnel portal seal, the guide rail 66, the back rest 62, the main top pipeline and the cable are installed, the No. 3 pipe jacking machine 65 is debugged online, the No. 3 pipe jacking machine 65 is jacked in a muddy water balance mode after being positioned in the No. 2 receiving well 3, jacking parameters are dynamically adjusted, sedimentation monitoring is carried out, the slurry proportion and the grouting amount are adjusted, and if the requirements are met, the No. 3 pipe jacking machine 65 continues jacking. Meanwhile, slag discharge is monitored, and if the slag discharge is not in accordance with the requirements, jacking parameters, slurry proportion and grouting quantity are adjusted.
In the invention, the No. 3 pipe 61 is a special pipe joint (pre-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 32mm.
In the invention, a No. 1 pipe jacking device 2 is a jacking driving part of a No. 1 pipe jacking machine, a No. 2 pipe jacking device 5 is a jacking driving part of a No. 2 pipe jacking machine, and a No. 3 pipe jacking device 6 is a jacking driving part of a No. 3 pipe jacking machine 65. The No. 3 push bench 6 (fig. 3 and 4) includes a back 62, a guide rail 66, a jacking bracket 63, six 200T jacking jacks 64, the back 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 62, the output ends of the six jacking jacks 64 are provided with steel collars 641, the steel collars 641 are slidably arranged on the guide rail 66, the six jacking jacks 64 synchronously drive the steel collars 641 to slide forward on the guide rail 66, and further push the No. 3 pipe 61, and the structures of the No. 1 push bench 2 and No. 2 push bench 5 are the same as those of the No. 3 push bench 6, which will not be described herein.
The push bench No. 1, push bench No. 2 and push bench No. 3 are all mud-water air pressure balance compound push bench 65. The mud-water air pressure balance composite pipe jacking machine mainly comprises a cutting and crushing system, a driving system, a deviation rectifying and hydraulic system,
The device comprises a shell, an in-machine mud feeding and discharging system, a measurement display system, an electric operating system, other auxiliary equipment and the like.
The working principle is as follows: along with the propulsion of the tool pipe, the cutterhead continuously rotates, the mud inlet pipe continuously supplies mud water and the mud discharge pipe
Continuously discharging the muddy water mixed with the ballasted soil out of the muddy water cabin. The mud water cabin is kept at a certain pressure to ensure that the cutterhead has mud
And tunneling forward under the condition of water pressure. The basic principle of the mud-water balance tool pipe is mud-water protection wall, which is in mud-water type
In pipe jacking construction, in order to keep the excavation surface stable, slurry with a certain pressure must be injected into the slurry tank. Slurry
And (3) penetrating into the soil body under the action of pressure to form a layer of mud skin on the excavated surface. On the one hand, mud skin functions
Preventing mud water from continuously leaking into soil body, on the other hand, the pressure of mud water is acted on the excavation surface through mud skin
Preventing collapse. Simultaneously, the lubricating and cooling effects are achieved. At present, different sections, different tunneling modes and adaptation are not suitable
Various types of push bench with engineering geological conditions can be customized or purchased directly by manufacturers, various types commonly used in the field can be selected, and as the No. 3 push bench 65 needs to excavate hard rock, the cutterhead and the cutter of the No. 3 push bench 65 are reinforced, so that in order to pull the No. 3 push bench 65 out, a group of steel wire ropes are arranged on the hanging ring of the No. 3 push bench, and the No. 3 push bench 65 can be smoothly pulled out of a hole.
In the step 4, the whole 3-jack pipe-jacking device 6 and 6-jack pipe-jacking device 6 need to be dismantled, the jacking pick, the slurry pipe and the tunnel portal are all auxiliary facilities of the 3-jack pipe-jacking device 6, after the auxiliary facilities are dismantled, a ventilation system and a power system are required to be reserved, the 3-jack pipe-jacking device 65 is provided with 6-jack pipe-jacking devices, the 6-jack pipe-jacking device 65 is dismantled at a stable, water-permeable or weak water-permeable section of a rock mass, in order to enable the 3-jack pipe-jacking device 65 to have enough pulling force, 2 pull jacking picks of 180T-220T are respectively arranged on two sides of the 3-jack pipe 61, in the embodiment, the 200T pull jacking pick is preferably arranged, the 2-jack pipe-jacking device 3 is used as a back wall of a jack, as a 3-jack pipe-jacking device, as the 3-jack pipe-jacking device 65 needs to pull the 3-jack pipe 61, and therefore the 3-jack pipe-jacking device 6 needs to be provided with a pulling device 8, the pulling device 8 comprises a pulling bracket 81, four pulling jacks 82, a group of steel wire ropes 83 and a plurality of cross irons arranged at a cross iron, the pulling bracket 81 is fixed on the side wall of the 2-jack pipe-jacking device 3 near the 3-jack pipe-jacking device 61, the side wall is provided with the 3, the pulling jack pipe-jacking device 82 is provided with the base 83, the top jack wire rope 83 is connected with the 3 through the base 83, and the base 83 of the jack pipe-jack pipe 83 is connected with the 3 through the jack pipe-jacking device 83, and the base 83, and the 3 is connected with the base 83.
In order to save cost and accelerate engineering progress, in this embodiment, the pull bracket 81 is formed by reversely installing the jacking bracket 63 of the No. 3 push bench 65, meanwhile, the pull jack 82 is formed by reversely installing the jacking jack 64 of the No. 3 push bench 65 on the pull bracket 81, the pull end of the pull jack 82 is provided with a plurality of cross-set cross bars, the cross bars are all made of I-steel with 40, the cross bars are specifically two cross bars 812 which are horizontally arranged and two cross bars 813 which are vertically arranged, the two cross bars 813 and the two cross bars 812 are vertically and horizontally crossed and fixed on the four pull jack 82, two cross bars 813 are fixed with two groups of cross bars 811 at intervals, the two cross bars 813 are slidably arranged on the four cross bars 811, one end of the steel wire 83 is fixedly connected with the cross bars 812, the other end of the steel wire 83 is connected with the corresponding pipe 61 with the 3 # and 3 h machine, the four 200t pull jacks 82 are jointly driven by the pull jack 611 to be connected with the 3 # 3, the pipe jack 82 is jointly pulled by the four 200t pull jacks to be moved to the side wall of the No. 3, and the pipe No. 3 is gradually moved to the pipe No. 3.5, and the pipe is gradually moved to the 3.5.5 m from the 3 to the outside of the pipe 0.5 to the 3.5 to the 3m machine, and the pipe is gradually moved to the outside of the 4.0.5.5 to the pipe is gradually outside of the pipe 3.0.5.
In the invention, two groups of steel wire ropes 83 are needed, 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 are 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/mm < 2 > -1600N/mm < 2 >, the nominal tensile strength of the steel wire rope is preferably 1550N/mm < 2 >, and the total cross section area of the steel wire rope is 697.08mm < 2 >.
Referring to fig. 8, in the step 5, the distance of the reverse pulling of the No. 3 pipe 61 is equal to the distance of the empty pushing of the No. 2 pipe jacking machine, the distance of the single reverse pulling of the No. 3 pipe 61 is 0.5 m-0.8 m, the distance of the first reverse pulling of the No. 2 pipe jacking machine is 0.5 m-0.8 m along with the empty pushing of the No. 3 pipe 61, in this embodiment, the distance of the first reverse pulling of the No. 3 pipe 61 is preferably 0.5m, the No. 2 pipe jacking machine is also pushed 0.5m along with the empty pushing of the No. 3 pipe 61, after the start of the pulling of the pushing pick, the pulling of the No. 3 pipe 61 is performed slowly, after the contact parts are closed, the normal speed is followed, for example, the first section of the No. 3 pipe 61 is pulled by 0.5m, the pick is retracted, the pipe retracting device is removed, the fastener is mounted to the second section of the No. 3 pipe 61, the No. 65 is retracted by 0.5m, the No. 2 pipe jacking machine is pushed by empty, and the cycle pulling and the empty pushing is repeated. After a section of No. 3 pipe 61 with the length of 2.0-2.5 m is pulled out of the No. 2 receiving well 3, the crane lifts the pulled-out No. 3 pipe 61 out of the No. 2 receiving well 3, the pipe is transported to a No. 3 working well 4 by a transport vehicle, the pipe is pushed and installed in an empty mode by a No. 2 push bench, the recycling is performed, and the remaining pipe is installed in the empty pushing mode.
The invention relates to a method for constructing a lift-off construction of an empty push-pull type pipe jacking machine, which comprises the steps of jacking and installing a pipe from a No. 2 receiving well 3 to a No. 3 working well 4 by utilizing a No. 3 pipe jacking machine 65, butting the pipe with the trapped No. 2 pipe jacking machine, pulling out the No. 3 pipe 61 from the No. 2 receiving well 3 section by adopting a pulling method, pushing the pipe from the No. 3 working well 4 section by adopting the No. 2 pipe jacking machine, and completing the tunneling of a hard rock section.
The above disclosure is illustrative of the preferred embodiments of the present invention and should not be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (4)
1. The method for constructing the hollow pushing and pulling type push bench is characterized by comprising the following steps of:
step 1: jacking the No. 1 pipe jacking machine from a No. 1 working well to a No. 2 receiving well, so that the No. 1 working well is communicated with the No. 2 receiving well;
step (a) 2: jacking the No. 2 push bench from the No. 3 working well to the No. 2 receiving well;
step 3: jacking the No. 3 push bench from the No. 2 receiving well to the No. 3 working well until the No. 3 push bench is in butt joint with the No. 2 push bench;
step 4: dismantling 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 a counter foundation pit of a No. 2 receiving well;
step 5: the dragging device drags the No. 3 pipe jacked by the No. 3 pipe jacking machine out of the hole in a reverse direction, and the No. 2 pipe jacking machine is jacked to the No. 2 receiving well in an empty pushing mode;
step 6: the 3-th push bench pulls and the 2-th push bench pushes empty and lifts out of the 2-th receiving well from the hole to the ground, so that the 3-th working well is communicated with the 2-th receiving well;
the step 5 specifically comprises the following steps: the dragging device drags the pipe 3 pushed in by the pipe jacking machine in a section-by-section reverse direction to make a hole, the transport vehicle transports the pipe 3 dragged to the working well 3, and the pipe jacking machine 2 circularly pushes the pipe 3 to the receiving well 2 in a hollow pushing mode;
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, which is close to the No. 3 pipe, the dragging jack is arranged on the dragging bracket, and the pushing-out end of the dragging jack is connected with the first No. 3 pipe jacked by the No. 3 pipe jacking machine through the steel wire rope;
the pulling bracket is formed by reversely mounting a jacking bracket of the No. 3 pipe jacking machine, and the pulling jack is formed by reversely mounting a jacking jack of the No. 3 pipe jacking machine on the pulling bracket;
the pushing end of the dragging jack is provided with a plurality of cross irons which are arranged in a crossing way, one end of the steel wire rope is connected with the cross irons, and the other end of the steel wire rope is connected with a pull ring corresponding to the No. 3 pipe;
in the step 5, the distance of reverse dragging of the No. 3 pipe is equal to the distance of empty pushing and jacking of the No. 2 pipe jacking machine, and the distance of single reverse dragging of the No. 3 pipe is 0.5 m-0.8 m;
the length of the No. 3 pipe is 2.0-2.5 m, and the No. 1 pipe pushing bench, the No. 2 pipe pushing bench and the No. 3 pipe pushing bench are all mud-water air pressure balance compound pipe pushing bench.
2. The method for releasing the trapped air from the push bench according to claim 1, wherein in the step 2, the push bench No. 3 is pushed from the receiving well No. 2 to the working well No. 3 by adopting a muddy water air pressure balanced composite push bench construction process.
3. The method for escaping from the trapped state of the air-pushing and pulling type pipe pushing machine according to claim 2 is characterized in that the construction process of the muddy water air pressure balance type pipe pushing machine is as follows: the grouting equipment, the tunnel portal seal, the guide rail, the back rest and the main roof are installed, the No. 3 pipe jacking machine jacks in the No. 2 receiving well in a mud-water balance mode, and jacking parameters, slurry proportion and grouting quantity are dynamically adjusted.
4. The method for releasing the trapped air push-pull push bench from the construction according to claim 1, wherein the step 6 is specifically: the No. 3 push bench is pulled out of the receiving well No. 2 to be lifted out of the ground through the pulling device, and the No. 2 push bench is pushed out of the receiving well No. 2 to be lifted out of the ground, so that the No. 3 working well is communicated with the receiving well No. 2.
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| CN115110973B (en) * | 2022-07-26 | 2022-12-20 | 北京建工土木工程有限公司 | Connecting channel pipe jacking construction backrest system and using method thereof |
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