CN111119917B - Urban rock stratum mud-water balance pipe jacking construction method - Google Patents
Urban rock stratum mud-water balance pipe jacking construction method Download PDFInfo
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- CN111119917B CN111119917B CN201911272700.5A CN201911272700A CN111119917B CN 111119917 B CN111119917 B CN 111119917B CN 201911272700 A CN201911272700 A CN 201911272700A CN 111119917 B CN111119917 B CN 111119917B
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- 239000011435 rock Substances 0.000 title claims abstract description 139
- 238000010276 construction Methods 0.000 title claims abstract description 78
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 230000007246 mechanism Effects 0.000 claims abstract description 386
- 230000005641 tunneling Effects 0.000 claims abstract description 140
- 238000000034 method Methods 0.000 claims abstract description 16
- 230000009471 action Effects 0.000 claims abstract description 11
- 238000005520 cutting process Methods 0.000 claims description 49
- 238000005553 drilling Methods 0.000 claims description 43
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 26
- 239000012530 fluid Substances 0.000 claims description 14
- 229910052742 iron Inorganic materials 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000005755 formation reaction Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 235000000396 iron Nutrition 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 241001669679 Eleotris Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/1086—Drives or transmissions specially adapted therefor
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Abstract
The invention provides a mud-water balance pipe jacking construction method for an urban rock stratum, which belongs to the technical field of geotechnical and geological engineering and comprises the following steps: the method comprises the steps that a base, a fracturing mechanism, a tunneling mechanism, a jacking mechanism, a switching mechanism and a control system are sequentially arranged in a pre-excavated foundation pit, the fracturing mechanism is used for fracturing a rock stratum, the tunneling mechanism is used for tunneling the rock stratum fractured by the fracturing mechanism, the jacking mechanism is used for jacking the fracturing mechanism or the tunneling mechanism to move along the length direction of the base, the switching mechanism is used for jacking or pulling the fracturing mechanism or the tunneling mechanism to move along the width direction of the base, and the control system is used for controlling the actions of the fracturing mechanism, the tunneling mechanism, the jacking mechanism and the switching mechanism. The mud-water balance pipe jacking construction method for the urban rock stratum provided by the invention has the technical effects that the rock stratum is cracked firstly and then is tunneled, the tunneling construction is easy, the pipe jacking operation speed is high, and the pipe jacking construction period is favorably prolonged.
Description
Technical Field
The invention belongs to the technical field of geotechnical and geological engineering, and particularly relates to a mud-water balance pipe jacking construction method for an urban rock stratum.
Background
The pipe jacking engineering technology is a non-excavation or few-excavation construction method, and is characterized in that a pipeline is jacked into the soil according to an actual design gradient by utilizing acting force generated by jacking equipment, so that the friction force between the pipeline and the soil is overcome, the earthwork is carried away, and the final pipeline construction is realized. One of the pipe jacking construction processes is a slurry-water balanced construction process, which refers to a method for pipe jacking work performed by maintaining a certain pressure of slurry in a cutting tool cavity of a pipe jacking machine.
In some urban rock stratums, because there are more rocks, when the pipe jacking engineering construction of the rock stratums is carried out, the existing pipe jacking machine cutterheads are mainly used for working, the rock is constructed through hobbing cutters, the generated load is used for promoting the rock to be crushed, the working principle is that the load exceeding the bearing capacity of the rock is applied to the surface of the rock, and the pipe jacking construction is carried out after the rock is crushed. When the existing pipe jacking construction method meets a stratum with more rocks, construction difficulty can be caused, if the cutter head is seriously abraded, the service life of the cutter head is short, frequent replacement is needed, the jacking construction progress of the rock stratum is slow, the existing construction method cannot meet the pipe jacking construction requirement, and the pipe jacking construction period is often delayed.
Disclosure of Invention
The invention aims to provide a mud-water balance pipe jacking construction method for an urban rock stratum, and aims to solve the technical problems that the construction progress is slow in pipe jacking construction for the urban rock stratum and the pipe jacking construction requirements cannot be met.
In order to achieve the purpose, the invention adopts the technical scheme that: the method for constructing the urban rock stratum mud-water balance jacking pipe comprises the following steps:
excavating a foundation pit at a place where pipe jacking construction is to be performed, and arranging a base in the foundation pit, so that the height of the base and the inclination angle of the base in the length direction are adjustable;
a fracturing mechanism for fracturing rock stratum is arranged on the base, and the fracturing mechanism is connected with the base in a sliding manner;
a tunneling mechanism for tunneling the rock stratum fractured by the fracturing mechanism is arranged on one side of the base, and the tunneling mechanism and the fracturing mechanism alternately operate;
a jacking mechanism with adjustable height is arranged in the foundation pit, so that the jacking mechanism can push or pull the fracturing mechanism or the tunneling mechanism to be close to or far away from the rock stratum wall, and the fracturing mechanism or the tunneling mechanism can move along the length direction of the base;
arranging a switching mechanism in a foundation pit, wherein the switching mechanism can push or pull the fracturing mechanism or the tunneling mechanism to be close to or far away from the base, so that the fracturing mechanism or the tunneling mechanism can move along the width direction of the base, and when the fracturing mechanism or the tunneling mechanism is arranged on the base, the fracturing mechanism or the tunneling mechanism operates on a rock stratum;
and arranging a control system at the outer side of the foundation pit, wherein the control system can control the actions of the fracturing mechanism, the tunneling mechanism, the jacking mechanism and the switching mechanism.
As another embodiment of the present application, after the fracturing mechanism fractures a rock stratum, the fracturing mechanism is far away from the base by means of the pulling force of the jacking mechanism and the switching mechanism, and the tunneling mechanism is placed on the base by means of the pushing force of the jacking mechanism and the switching mechanism; after the tunneling mechanism tunnels the fractured rock stratum, the tunneling mechanism is far away from the base by means of the pulling force of the jacking mechanism and the switching mechanism, the fracturing mechanism is placed on the base by means of the pushing force of the jacking mechanism and the switching mechanism, and the fracturing mechanism and the tunneling mechanism operate alternately.
As another embodiment of the present application, the fracturing mechanism includes a fracturing housing, a drilling machine, a pump set, and a packer, the drilling machine is disposed in the fracturing housing and used for drilling a borehole into a rock formation, and the drilling machine is controlled by the control system; the pump set is arranged in the fracturing shell and used for pumping fracturing fluid into a drilled drill hole and forming high pressure in the drill hole, and the pump set is controlled by the control system; the packer is used for plugging a drilled drilling hole port, the pump unit pumps fracturing fluid into the drilling hole on the inner side of the packer, and the drilling hole surrounding rock is fractured through the pressure of the fracturing fluid.
As another embodiment of this application, fracturing mechanism is still including locating drilling disc on the fracturing casing front end face, the rig is a plurality ofly, and circumference evenly arranges on the drilling disc, the vertical setting of drilling disc is towards the stratum, and is a plurality of the rig is used for creeping into the stratum simultaneously.
As another embodiment of the application, the method for constructing the mud-water balance jacking pipe of the urban rock stratum further comprises the step of arranging a hoisting mechanism for hoisting the fracturing mechanism and the tunneling mechanism on the outer side of the foundation pit after the switching mechanism is arranged, wherein the hoisting mechanism can adjust the operation position of the fracturing mechanism or the tunneling mechanism.
As another embodiment of the present application, the switching mechanism includes a first set of switches for pushing or pulling the fracturing mechanism to move along the base width direction, a second set of switches, and a connector, the first set of switches being controlled by the control system; the second group of switches are arranged opposite to the first group of switches, are respectively positioned on two sides of the fracturing mechanism or the tunneling mechanism and are used for pushing or pulling the tunneling mechanism to move along the width direction of the base, and are controlled by the control system; the connectors are arranged on the pushing ends of the first group of switchers and the second group of switchers respectively and used for connecting the fracturing mechanism or the tunneling mechanism.
As another embodiment of the present application, the jacking mechanism includes a first set of jacks, a second set of jacks, a first jacking iron and a second jacking iron, the first set of jacks is used for pushing the fracturing mechanism or the tunneling mechanism into the rock formation, and the first set of jacks is controlled by the control system; the second group of ejectors are connected with the first group of ejectors end to end and are used for ejecting the first group of ejectors to move, and the second group of ejectors are controlled by the control system; the first ejector iron is arranged on the ejection end of the first group of ejectors; the second ejector iron is arranged on the ejection end of the second group of ejectors.
As another embodiment of the application, the tunneling mechanism comprises a cutting shell, a cutting end face, a muddy water assembly, a chip removal assembly and a power assembly, wherein the cutting end face is arranged on the end face of the cutting shell and is provided with a tool rest assembly for cutting a rock stratum, and the cutting end face is provided with a mud discharge port; the mud-water assembly is arranged in the cutting shell and is provided with a water inlet pipeline for connecting an external water source and a mud discharge pipeline for discharging mud water, and one end of the mud discharge pipeline is connected with the mud discharge port and is used for maintaining the pressure balance of the mud water in the cutting shell; the chip removal assembly is arranged in the cutting shell and used for discharging crushed rock cut by the tool rest assembly to the outside of the cutting shell; the power assembly is used for driving the tool rest assembly to cut and drive the rock stratum the chip removal assembly discharges the broken rock, and the power assembly is controlled by the control system.
As another embodiment of the present application, after the switching mechanism is set, a concrete pipe is set between the jacking mechanism and the fracturing mechanism or the tunneling mechanism, so that one end of the concrete pipe is in sleeve joint with the jacking mechanism, and the other end of the concrete pipe is in sleeve joint with the fracturing mechanism or the tunneling mechanism.
As another embodiment of the present application, after the switching mechanism is disposed, a slide rail is disposed along the length direction of the base, so that the concrete pipe, the fracturing mechanism, and the tunneling mechanism are disposed on the slide rail respectively and can slide along the slide rail.
The mud-water balance pipe jacking construction method for the urban rock stratum has the beneficial effects that: compared with the prior art, the mud-water balance pipe jacking construction method for the urban rock stratum can be used for pre-fracturing the rock stratum by arranging the fracturing mechanism in the foundation pit, the fractured rock stratum is loosened, so that the cutting and tunneling operation of the tunneling mechanism is facilitated, the fracturing mechanism and the tunneling mechanism are alternately operated by means of the jacking force of the jacking mechanism and the switching operation of the switching mechanism, the fractured rock stratum has small abrasion to a cutter head of the tunneling mechanism, the technical problems that the construction progress is slow in pipe jacking construction of the urban rock stratum and the pipe jacking construction requirement cannot be met are solved, the rock stratum is fractured first and then tunneled, the tunneling construction is easy, the pipe jacking operation speed is high, and the technical effect of prolonging the construction period of the pipe jacking construction is facilitated.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of an arrangement structure of a mud-water balance pipe jacking construction method for an urban rock stratum according to an embodiment of the invention;
FIG. 2 is a top view of an arrangement structure of the urban rock stratum mud-water balance pipe jacking construction method provided by the embodiment of the invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 4 is a cross-sectional view taken at B-B of FIG. 2;
FIG. 5 is a side view of a fracturing shell of an arrangement structure of the urban rock formation mud-water balance pipe jacking construction method according to the embodiment of the present invention;
FIG. 6 is a diagram showing the effect of a fracturing mechanism with a structure on the end face of a rock stratum after the rock stratum is fractured according to the method for mud-water balance pipe jacking construction of an urban rock stratum provided by the embodiment of the invention;
FIG. 7 is a control block diagram of a control system of the urban rock stratum mud-water balance pipe jacking construction method according to the embodiment of the invention.
In the figure: 1. a base; 11. a first support column; 2. a fracturing mechanism; 21. a fracturing housing; 22. a drilling machine; 23. a pump group; 24. drilling a disc; 3. a tunneling mechanism; 31. cutting the housing; 32. cutting an end face; 33. a mud water assembly; 34. a chip removal assembly; 4. a jacking mechanism; 41. a first set of jacks; 42. a second set of jacks; 43. a first top iron; 44. a second top iron; 45. a second support column; 5. a switching mechanism; 51. a first set of switches; 52. a second group of switches; 53. a connector; 6. a control system; 7. a hoisting mechanism; 8. a concrete pipe; 9. a slide rail; 10. and a support table.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and fig. 7, a construction method of mud-water balanced pipe jacking in an urban rock stratum according to the present invention will now be described. The urban rock stratum mud-water balance pipe jacking construction method comprises the following steps:
excavating a foundation pit at a place where pipe jacking construction is to be performed, and arranging a base 1 in the foundation pit to enable the height of the base 1 and the inclination angle of the base 1 in the length direction to be adjustable;
a fracturing mechanism 2 for fracturing rock stratum is arranged on the base 1, so that the fracturing mechanism 2 is in sliding connection with the base 1;
a tunneling mechanism 3 for tunneling the rock stratum fractured by the fracturing mechanism 2 is arranged on one side of the base 1, so that the tunneling mechanism 3 and the fracturing mechanism 2 alternately operate;
a jacking mechanism 4 with adjustable height is arranged in the foundation pit, so that the jacking mechanism 4 can push or pull the fracturing mechanism 2 or the tunneling mechanism 3 to be close to or far away from the rock stratum wall, and the fracturing mechanism 2 or the tunneling mechanism 3 can move along the length direction of the base 1;
arranging a switching mechanism 5 in the foundation pit, enabling the switching mechanism 5 to push or pull the fracturing mechanism 2 or the tunneling mechanism 3 to be close to or far away from the base 1, enabling the fracturing mechanism 2 or the tunneling mechanism 3 to move in the width direction of the base 1, and after the fracturing mechanism 2 or the tunneling mechanism 3 is arranged on the base 1, operating the rock stratum by the fracturing mechanism 2 or the tunneling mechanism 3;
a control system 6 is arranged on the outer side of the foundation pit, so that the control system 6 can control the actions of the fracturing mechanism 2, the tunneling mechanism 3, the jacking mechanism 4 and the switching mechanism 5.
Compared with the prior art, the mud-water balance pipe jacking construction method for the urban rock stratum, provided by the invention, has the advantages that the fracturing mechanism 2 is arranged in the foundation pit, the rock stratum can be pre-fractured, the fractured rock stratum becomes loose, the cutting and tunneling operation of the tunneling mechanism 3 is facilitated, the fracturing mechanism 2 and the tunneling mechanism 3 are alternately operated by means of the jacking force of the jacking mechanism 4 and the switching operation of the switching mechanism 5, the cutterhead of the tunneling mechanism 3 is slightly abraded by the fractured rock stratum, the technical problems that the construction progress is slow in pipe jacking construction of the urban rock stratum and the pipe jacking construction requirement cannot be met are solved, the rock stratum is fractured first and then tunneled, the abrasion of the hard rock stratum to the cutterhead of the pipe jacking machine is reduced, the tunneling construction is easy, the pipe jacking operation speed is high, and the technical effect of improving the pipe jacking construction period is facilitated.
The foundation pit is excavated in advance, mechanical equipment for pipe jacking operation can be arranged in the foundation pit, specifically, two groups of steps are arranged in the foundation pit and are arranged at a certain height difference, one group of steps are used for installing the base 1, the fracturing mechanism 2, the tunneling mechanism 3 and the switching mechanism 5, the other group of steps are used for installing the jacking mechanism 4, and the jacking direction of the jacking mechanism 4 faces the fracturing mechanism 2 and the tunneling mechanism 3.
In a specific embodiment, the cross section of the base 1 is arc-shaped, because the pipe is convenient to install in the pipe jacking construction, the pipe refers to the pipe in the pipe jacking construction, the cross section of the pipe is generally circular, and then the base 1 is arranged to be arc-shaped and can be matched with the outer arc shape of the pipe, so that the base 1 can be arranged to facilitate rapid operation in the pipe jacking construction and the pipe installation, the abrasion to the pipe is reduced, the pipe is operated on the base 1, the slippage is not easy, and the operation efficiency is convenient to improve.
The fracturing mechanism 2 is a fracturing device of a hydraulic fracturing method, wherein the hydraulic fracturing is also called hydraulic fracturing, the construction method belongs to the prior art, the device can realize the mutual alternate cycle operation of the fracturing mechanism 2 and the tunneling mechanism 3, in the process of one pipe-jacking construction procedure, the fracturing mechanism 2 is adopted to fracture or fracture the rock stratum in advance, then the fractured rock stratum is cut and excavated by the tunneling mechanism 3, and a plurality of gaps can be formed in the rock stratum after the rock stratum is fractured, and then the rock stratum is cut off by a cutter head of the tunneling mechanism 3, so that the pipe-jacking construction operation of one procedure is completed. The alternate operation of the fracturing mechanism 2 and the tunneling mechanism 3 is switched by means of the switching mechanism 5, after the switching operation is completed, the fracturing mechanism 2 or the tunneling mechanism 3 is jacked into the rock stratum by a certain distance through the jacking mechanism 4, so that the pipe jacking construction of the next procedure can be performed, and the fracturing mechanism 2, the tunneling mechanism 3, the jacking mechanism 4 and the switching mechanism 5 can be controlled through the control system 6. After the fracturing mechanism 2 or the tunneling mechanism 3 finishes one working procedure, the fracturing mechanism 2 or the tunneling mechanism 3 returns to the outer side of the rock stratum through the jacking mechanism 4, the fracturing mechanism 2 and the tunneling mechanism 3 are mutually exchanged in position through the switching mechanism 5, and finally the fracturing mechanism 2 or the tunneling mechanism 3 is pushed into the tunneled rock stratum through the jacking mechanism 4. The alternating operation is repeated, and finally the rock stratum is excavated to form a channel, so that the pipeline is conveniently installed in the channel.
The control system 6 is an industrial personal computer, and is provided with a programmable controller of a PLC for controlling the operation of each mechanism, and a control button for controlling the action of each mechanism, the control system 6 also comprises control software for controlling the operation of each mechanism, the control software is the prior art and can be purchased from the market, so the control principle and the control process of the control software are not repeated here, and the control system 6 can realize the control of the mechanisms.
As a specific embodiment of the urban rock stratum mud-water balance pipe jacking construction method provided by the invention, please refer to fig. 1-2, 4 and 7, after the fracturing mechanism 2 fractures a rock stratum, the fracturing mechanism 2 is far away from the base 1 by virtue of the pulling force of the jacking mechanism 4 and the switching mechanism 5, and the tunneling mechanism 3 is placed on the base 1 by virtue of the pushing force of the jacking mechanism 4 and the switching mechanism 5; after the tunneling mechanism 3 tunnels the fractured rock stratum, the tunneling mechanism 3 is far away from the base 1 by means of the pulling force of the jacking mechanism 4 and the switching mechanism 5, the fracturing mechanism 2 is placed on the base 1 by means of the pushing force of the jacking mechanism 4 and the switching mechanism 5, and the alternate operation of the fracturing mechanism 2 and the tunneling mechanism 3 is realized. The control system 6 controls the switching mechanism 5 to act, so that the fracturing mechanism 2 and the tunneling mechanism 3 alternately operate, rapid tunneling operation on rock strata is facilitated, the movement paths of the fracturing mechanism 2 and the tunneling mechanism 3 are along the width direction of the base 1, the movement path of the jacking mechanism 4 is along the length direction of the base 1, and pipe jacking construction on urban rock strata can be achieved. The fracturing mechanism 2 is adopted, hard rock can be broken and cracked, and the cutter head on the tunneling mechanism 3 is high in cutting efficiency of rock strata with cracks, so that the cutting efficiency of the rock strata with cracks through the tunneling mechanism 3 is high. The fracturing mechanism 2 and the tunneling mechanism 3 can slide on the base 1, so that the friction force between the fracturing mechanism and the base 1 can be reduced, and the fracturing mechanism and the tunneling mechanism can be pushed into a rock stratum wall quickly by pushing of the jacking mechanism 4.
As a specific embodiment of the urban rock stratum mud-water balance pipe jacking construction method provided by the invention, please refer to fig. 1-2, 4-5, the fracturing mechanism 2 comprises a fracturing shell 21, a drilling machine 22, a pump set 23 and a packer, the drilling machine 22 is arranged in the fracturing shell 21 and used for drilling a borehole into a rock stratum, and the drilling machine 22 is controlled by the control system 6; the pump unit 23 is arranged in the fracturing shell 21 and used for pumping fracturing fluid into a drilled borehole and forming high pressure in the borehole, and the pump unit 23 is controlled by the control system 6; the packer is used for plugging drilled drilling ports, and the pump unit 23 pumps fracturing fluid into a drilling hole on the inner side of the packer, so that the surrounding rock of the drilling hole is fractured by the pressure of the fracturing fluid. When the hydraulic fracturing device is used, a drilling machine 22 is used for drilling a rock stratum, then a hose pumped with fracturing fluid extends into the drilled hole, then an outer port of the drilled hole is plugged by a packer, so that a closed space is formed in the drilled hole, the preset fracturing pressure is obtained through calculation, finally the fracturing fluid is injected into the closed space through a pump unit 23, and when the pressure reaches the pre-calculated pressure, cracks are formed in surrounding rocks of the drilled hole, so that hydraulic fracturing of the rock stratum is realized. The use of the fracturing unit 2 and the principles of fracturing the rock formations are well known in the art and therefore the use of the fracturing unit 2 will not be described in greater detail herein. Wherein the packer is installed manually. The drilling machine 22 is a hydraulic drilling machine, the pump unit 23 is a hydraulic pump unit, and the packer belongs to packers used in the prior art.
In one embodiment, the fracturing casing 21 is a casing structure with a hollow cavity inside, and the drilling rig 22, the pump unit 23 and the packer are all located in the hollow cavity. A plurality of drilling machines 22 are arranged and face a rock stratum to drill, the pump unit 23 is a hydraulic pump unit 23 and can pump fracturing fluid into a drilled hole, and then the fracturing fluid is pumped into the drilled hole through the pump unit 23, and the fracturing fluid in the drilled hole forms pressure on surrounding rocks of the drilled hole due to overlarge pressure and cracks the surrounding rocks. The pressure generated by the pump unit 23 can be calculated by a formula, and the wall rock fracturing pressure is determined according to the wall rock property. The greater the pressure, the greater the damage to the surrounding rock and the greater the fractures that are created.
Specifically, the fracturing housing 21 is a cylindrical structure, and an outer arc of the cylindrical structure is adapted to the base 1.
Referring to fig. 1-2 and 4-5, the fracturing mechanism 2 further includes a plurality of drilling discs 24 disposed on the front end face of the fracturing housing 21, the plurality of drilling machines 22 are circumferentially and uniformly disposed on the drilling discs 24, the drilling discs 24 are vertically disposed and face the rock formation, and the plurality of drilling machines 22 are simultaneously used for drilling the rock formation. The drill disks 24 are used for installing the drilling machine 22, the drill disks 24 are circular, a plurality of drills can also form a circle after being installed on the drill disks 24, the rock strata are fractured through the hydraulic fracturing technology, cracks in the rock strata are irregular in shape, after the rock strata subjected to hydraulic fracturing are tunneled by the tunneling mechanism 3, the drilling machines 22 are arranged in a circular shape, finally, a channel similar to a circle can be formed in the tunneled rock strata, and therefore pipe jacking construction can be conveniently carried out in the circular channel, namely, a pipeline is jacked into the channel. The control system 6 can control a plurality of drilling machines 22 to work simultaneously and can also control the pressure value generated by the pump group 23.
As a specific embodiment of the urban rock stratum mud-water balance pipe jacking construction method provided by the invention, please refer to fig. 1 to 2, the urban rock stratum mud-water balance pipe jacking construction method further comprises the step of arranging a hoisting mechanism 7 for hoisting the fracturing mechanism 2 and the tunneling mechanism 3 on the outer side of the foundation pit after the switching mechanism 5 is arranged, the hoisting mechanism 7 can adjust the operation position of the fracturing mechanism 2 or the tunneling mechanism 3, and the hoisting mechanism 7 is controlled by the control system 6. When the positions of the fracturing mechanism 2 and the tunneling mechanism 3 need to be adjusted, the fracturing mechanism 2 or the tunneling mechanism can be lifted by a certain height through the lifting mechanism 7, after the proper positions of fracturing operation and tunneling operation on a rock stratum are found, the lifting mechanism 7 falls down, and the fracturing mechanism 2 or the tunneling mechanism 3 can be placed on the proper positions, so that the fracturing mechanism 2 and the tunneling mechanism can be adjusted, and the fracturing and tunneling efficiency on the rock stratum can be improved.
In a specific embodiment, the hoisting mechanism 7 can also operate the alternate operation of the fracturing mechanism 2 and the tunneling mechanism 3, and when the switching operation is not performed by using the switching mechanism 5, the position exchange of the fracturing mechanism 2 and the tunneling mechanism 3 can be realized by the hoisting mechanism 7, and the aims of fracturing the rock stratum and tunneling operation can also be achieved. The hoisting mechanism 7 and the switching mechanism 5 have the same effect on fracturing and tunneling of rock strata, so that the alternate operation of the fracturing mechanism 2 and the tunneling mechanism 3 can be completed through the hoisting mechanism 7. It is to be noted that when the hoisting mechanism 7 is used for hoisting work, it is ensured that the hoisting weight of the hoisting mechanism 7 is greater than the own weight of the fracturing mechanism 2 or the heading mechanism 3.
Referring to fig. 2 and 4, the switching mechanism 5 includes a first set of switches 51, a second set of switches 52 and a connector 53, the first set of switches 51 is used for pushing or pulling the fracturing mechanism 2 to move along the width direction of the base 1, and the first set of switches 51 is controlled by the control system 6; the second group of switches 52 are arranged opposite to the first group of switches 51, are respectively positioned at two sides of the fracturing mechanism 2 or the tunneling mechanism 3, and are used for pushing or pulling the tunneling mechanism 3 to move along the width direction of the base 1, and the second group of switches 52 are controlled by the control system 6; the connectors 53 are respectively provided on the pushing ends of the first group of switches 51 and the second group of switches 52, and are used for connecting the fracturing mechanism 2 or the tunneling mechanism 3. The fixed ends of the first group of switches 51 and the second group of switches 52 are fixed in a foundation pit, the first group of switches 51 are used for controlling the movement of the fracturing mechanism 2, the second group of switches 52 are used for controlling the movement of the tunneling mechanism 3, the pushing ends of the first group of switches 51 can be connected to the fracturing mechanism 2 through the connectors 53, the pushing ends of the second group of switches 52 are connected to the tunneling mechanism 3 through the connectors 53, the moving speed of the fracturing mechanism 2 and the tunneling mechanism 3 is increased, and the moving amount of the fracturing mechanism 2 and the tunneling mechanism 3 can be freely controlled.
Specifically, the first group of switches 51 and the second group of switches 52 have the same structure and are driving members capable of generating ejection force, the first group of switches 51 and the second group of switches 52 can be hydraulic telescopic rods, and both comprise a plurality of telescopic hydraulic cylinders and are communicated with a hydraulic pump station, the hydraulic pump station is arranged on the outer side of a foundation pit or on the ground, and generates hydraulic driving force through the hydraulic pump station and is telescopic, so that the fracturing mechanism 2 or the tunneling mechanism 3 can be pushed or pulled to move.
In one embodiment, the connector 53 is a clamp or lock that connects the pushing end of the first set of switches 51 or the second set of switches 52 to the fracturing structure or ripping mechanism 3. Preferably, the connector 53 is a detachable device. When the pushing or pulling distance between the first set of switches 51 and the second set of switches 52 cannot meet the construction requirement, a sleeper is placed on the inner wall of the foundation pit and fixed in the foundation pit, so that the operation range of the first set of switches 51 and the second set of switches 52 can be expanded.
As a specific embodiment of the urban rock stratum mud-water balance pipe jacking construction method provided by the invention, referring to fig. 1 to 2, the jacking mechanism 4 comprises a first set of jacking devices 41, a second set of jacking devices 42, first jacking irons 43 and second jacking irons 44, the first set of jacking devices 41 are used for jacking the fracturing mechanism 2 or the tunneling mechanism 3 into the rock stratum, and the first set of jacking devices 41 are controlled by the control system 6; the second set of lifters 42 are connected end to end with the first set of lifters 41 for pushing the first set of lifters 41 to move, and the second set of lifters 42 are controlled by the control system 6; the first ejector iron 43 is arranged on the ejection end of the first set of ejectors 41; a second ejector iron 44 is provided on the ejection end of the second set of ejectors 42. The first jacking device 41 and the second jacking device 42 are connected end to end, so that the great propelling length of the fracturing mechanism 2 and the tunneling mechanism 3 can be realized, and the fracturing mechanism 2 and the tunneling mechanism 3 can be constructed in a great range, wherein the range refers to a moving range along the length direction of the base 1.
Wherein, first top iron 43 and second top iron 44 all belong to prior art, first group jacking machine 41 is the same with the structure of second group jacking machine 42, be the driving piece that can produce the ejection force, first group jacking machine 41 and second group jacking machine 42 can be the flexible member of hydraulic pressure, all include a plurality of flexible pneumatic cylinders, and all communicate hydraulic power unit, hydraulic power unit sets up in the outside of foundation ditch or subaerial, hydraulic drive power through hydraulic power unit production, and produce and stretch out and draw back, thereby can promote or pull fracturing structure or the length direction slip along base 1 of tunnelling mechanism 3.
Specifically, the first and second back irons 43 and 44 can provide uniform distribution of the pushing force, so that the pushing force or the pulling force acting on the fracturing mechanism 2 and the tunneling mechanism 3 is uniform. When the pushing or pulling distance between the first set of pushing devices 41 and the second set of pushing devices 42 cannot meet the construction requirement, sleepers are placed on the inner wall of the foundation pit and fixed in the foundation pit, so that the operation range of the first set of pushing devices 41 and the second set of pushing devices 42 can be enlarged.
As a specific implementation of the urban rock stratum mud-water balance pipe jacking construction method provided by the invention, please refer to fig. 2 and 4, the tunneling mechanism 3 comprises a cutting shell 31, a cutting end face 32, a mud-water assembly 33, a chip removal assembly 34 and a power assembly, wherein the cutting end face 32 is arranged on the end face of the cutting shell 31 and is provided with a tool rest assembly for cutting a rock stratum, and the cutting end face 32 is provided with a mud discharge port; the mud-water assembly 33 is arranged in the cutting shell 31, and is provided with a water inlet pipeline for connecting an external water source and a mud discharge pipeline for discharging mud water, wherein one end of the mud discharge pipeline is connected with a mud discharge port for maintaining the pressure balance of the mud water in the cutting shell 31; the chip removal assembly 34 is arranged in the cutting shell 31 and used for discharging crushed rock cut by the tool rest assembly to the outside of the cutting shell 31; the power assembly is used for driving the tool rest assembly to cut the rock stratum and driving the chip removal assembly 34 to discharge the broken rock, and is controlled by the control system 6. Muddy water discharged from the mud discharge port and water entering the water inlet pipeline can maintain the pressure balance of the muddy water in the cutting shell 31, and further the construction of the muddy water balance jacking pipe is realized. The control system 6 can control the action of the power assembly, which can control the action of the chip removal assembly 34 and the tool rest assembly, and further, the control system 6 can control the action of the tool rest assembly and the chip removal assembly 34, so as to facilitate the cutting of the rock stratum. The muddy water assembly 33, the chip removal assembly 34 and the power assembly belong to the prior art, and can realize each operation action of the tunneling mechanism 3, and the operation principle of each assembly is not described herein again.
In a specific embodiment, the cutting housing 31 is a housing structure, the interior of the cutting housing is a cavity, the slurry assembly 33, the chip removal assembly 34 and the power assembly are located in the cavity, the cutting end face 32 is located at an end of the cutting housing 31 and is vertically disposed, the tool rest assembly is disposed on the cutting end face 32, the tool rest assembly is used for cutting a fractured rock stratum, a slurry discharge port on the cutting end face 32 can discharge slurry outwards, the slurry assembly 33 can maintain the balance of slurry in the cutting housing 31, the chip removal assembly 34 can discharge the cut rock, and the power assembly can control actions of the chip removal assembly 34 and the tool rest assembly, so as to facilitate cutting operations on the rock stratum.
Referring to fig. 1 to 2, after the switching mechanism 5 is set, a concrete pipe 8 is set between the jacking mechanism 4 and the fracturing mechanism 2 or the tunneling mechanism 3, such that one end of the concrete pipe 8 is in sleeve connection with the jacking mechanism 4, and the other end of the concrete pipe is in sleeve connection with the fracturing mechanism 2 or the tunneling mechanism 3. The concrete pipe 8 is a concrete pipeline, when the fracturing mechanism 2 and the tunneling mechanism 3 are operated, the concrete pipe 8 can be arranged between the jacking mechanism 4 and the fracturing mechanism 2 or the tunneling mechanism 3, and the fracturing mechanism 2 and the tunneling mechanism 3 can be pushed or pulled by arranging the concrete pipe 8 because the outer diameter of the concrete pipe 8 is equivalent to the outer edge of the cross section of the fracturing mechanism 2 or the tunneling mechanism 3.
Specifically, connectors 53 are arranged at two ends of the concrete pipe 8, the connectors 53 can connect the mutual connection positions of the jacking mechanism 4, the concrete pipe 8, the fracturing mechanism 2 or the tunneling mechanism 3, and the concrete pipe 8, the fracturing mechanism 2 or the tunneling mechanism 3 can slide back and forth by pushing or pulling the jacking mechanism 4, wherein the sliding is sliding along the length direction of the base 1. One end of the concrete pipe 8 is connected with the first top iron 43 through a connector 53, and the other end is connected with the fracturing mechanism 2 or the tunneling mechanism 3 through the connector 53.
Referring to fig. 1, 3 and 4, after the switching mechanism 5 is arranged, a slide rail 9 is arranged along the length direction of the base 1, so that the concrete pipe 8, the fracturing mechanism 2 and the tunneling mechanism 3 are respectively arranged on the slide rail 9 and can slide along the slide rail 9. Base 1 is for being curved backup pad, in order to make concrete pipe 8, fracturing unit constructs 2 and tunnelling mechanism 3 reduce and base 1 between the frictional force, set up slide rail 9 on base 1, slide rail 9 includes that a plurality of can follow the gliding gyro wheel of base 1 length direction, the gyro wheel is installed in the backup pad, after a plurality of gyro wheels were installed in the backup pad, its cross-section also can enclose into arc, the gyro wheel can with concrete pipe 8, fracturing casing 21 and smear metal casing mutual adaptation or rolling friction.
Specifically, the bottom of base 1 is equipped with the first support column 11 of a plurality of, and the flexible height-adjustable of first support column 11, through the flexible length of adjusting the first support column 11 of a plurality of, then can realize that the height of base 1 and the ascending inclination of base 1 length direction are adjustable.
Specifically, the bottom of the jacking mechanism 4 is provided with a plurality of second supporting columns 45, and the height and adjustability of the jacking mechanism 4 can be realized by adjusting the telescopic lengths of the second supporting columns 45.
In one embodiment, supporting tables 10 with the same height are arranged on two sides of a base 1, the height of the upper end face of each supporting table 10 is equal to that of the upper end face of the base 1, a fracturing mechanism 2 and a tunneling mechanism 3 are arranged on each supporting table 10, the fracturing mechanism 2 and the tunneling mechanism 3 are respectively located on two sides of the base 1, and the fracturing mechanism 2 or the tunneling mechanism 3 can be located on the base 1 or the base 1 through ejection and pulling of a switching mechanism 5, so that fracturing and cutting operations on a rock stratum are realized. Wherein the fracturing mechanism 2 and the tunneling mechanism 3 are alternately arranged on the base 1. Through the operation of switching mechanism 5, can overcome the resistance of base 1, with the bottom of fracturing unit structure 2 and the bottom of tunnelling mechanism 3 all be equipped with a planar structure, can make cutting shell 31 and fracturing shell 21 arrange in on brace table 10, when needs use fracturing unit structure 2 or tunnelling mechanism 3, through the action of switching mechanism 5, with it remove to base 1 on can, satisfied the push pipe construction to the stratum, improve the construction progress to the balanced push pipe construction of urban stratum muddy water. The height of the supporting table 10 is adjustable, the pushing end of the switching mechanism 5 is provided with a hinged connector 53, and the connector 53 is connected stably and is not easy to fall off, so that the construction effect is guaranteed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The urban rock stratum mud-water balance pipe jacking construction method is characterized by comprising the following steps of:
excavating a foundation pit at a place where pipe jacking construction is to be performed, and arranging a base in the foundation pit, so that the height of the base and the inclination angle of the base in the length direction are adjustable;
a fracturing mechanism for fracturing rock stratum is arranged on the base, and the fracturing mechanism is connected with the base in a sliding manner;
a tunneling mechanism for tunneling the rock stratum fractured by the fracturing mechanism is arranged on one side of the base, and the tunneling mechanism and the fracturing mechanism alternately operate;
a jacking mechanism with adjustable height is arranged in the foundation pit, so that the jacking mechanism can push or pull the fracturing mechanism or the tunneling mechanism to be close to or far away from the rock stratum wall, and the fracturing mechanism or the tunneling mechanism can move along the length direction of the base;
arranging a switching mechanism in a foundation pit, wherein the switching mechanism can push or pull the fracturing mechanism or the tunneling mechanism to be close to or far away from the base, so that the fracturing mechanism or the tunneling mechanism can move along the width direction of the base, and when the fracturing mechanism or the tunneling mechanism is arranged on the base, the fracturing mechanism or the tunneling mechanism operates on a rock stratum;
arranging a control system at the outer side of the foundation pit, wherein the control system can control the actions of the fracturing mechanism, the tunneling mechanism, the jacking mechanism and the switching mechanism;
the jacking mechanism comprises:
a first set of ejectors for ejecting the fracturing mechanism or the ripping mechanism into a formation, the first set of ejectors controlled by the control system;
the second group of ejectors are connected with the first group of ejectors end to end and used for ejecting the first group of ejectors to move, and the second group of ejectors are controlled by the control system;
the first ejector iron is arranged on the ejection ends of the first group of ejectors; and
and the second ejector iron is arranged on the ejection end of the second group of ejectors.
2. The urban rock formation mud-water balance pipe jacking construction method according to claim 1, wherein after the fracturing mechanism fractures a rock stratum, the fracturing mechanism is far away from the base by means of the pulling force of the jacking mechanism and the switching mechanism, and the tunneling mechanism is placed on the base by means of the pushing force of the jacking mechanism and the switching mechanism; after the tunneling mechanism tunnels the fractured rock stratum, the tunneling mechanism is far away from the base by means of the pulling force of the jacking mechanism and the switching mechanism, the fracturing mechanism is placed on the base by means of the pushing force of the jacking mechanism and the switching mechanism, and the fracturing mechanism and the tunneling mechanism operate alternately.
3. The urban rock formation mud-water balance pipe jacking construction method of claim 1, wherein the fracturing mechanism comprises:
a fracturing housing;
the drilling machine is arranged in the fracturing shell and used for drilling a borehole into a rock stratum, and the drilling machine is controlled by the control system;
the pump set is arranged in the fracturing shell and used for pumping fracturing fluid into a drilled drill hole and forming high pressure in the drill hole, and the pump set is controlled by the control system; and
the pump set pumps fracturing fluid into the drill hole on the inner side of the packer, and the surrounding rock of the drill hole is fractured by the pressure of the fracturing fluid.
4. The urban rock formation mud-water balance pipe jacking construction method according to claim 3, further comprising a plurality of drilling rigs arranged on the front end face of the fracturing shell, wherein the plurality of drilling rigs are circumferentially and uniformly arranged on the drilling rigs, the drilling rigs are vertically arranged and face a rock stratum, and the plurality of drilling rigs are simultaneously used for drilling the rock stratum.
5. The urban rock stratum mud-water balance pipe jacking construction method according to claim 1, further comprising the step of arranging a hoisting mechanism for hoisting the fracturing mechanism and the tunneling mechanism on the outer side of the foundation pit after the switching mechanism is arranged, wherein the hoisting mechanism can adjust the operation position of the fracturing mechanism or the tunneling mechanism.
6. The urban rock stratum mud-water balance pipe jacking construction method of claim 2, wherein the switching mechanism comprises:
the first group of switches are used for pushing or pulling the fracturing mechanism to move along the width direction of the base, and the first group of switches are controlled by the control system;
the second group of switchers are arranged opposite to the first group of switchers, are respectively positioned at two sides of the fracturing mechanism or the tunneling mechanism and are used for pushing or pulling the tunneling mechanism to move along the width direction of the base, and are controlled by the control system; and
the connectors are multiple and are respectively arranged on the pushing ends of the first group of switchers and the second group of switchers and used for being connected with the fracturing mechanism or the tunneling mechanism.
7. The urban rock stratum mud-water balance pipe jacking construction method according to claim 1, wherein the tunneling mechanism comprises:
cutting the housing;
the cutting end face is arranged on the end face of the cutting shell and is provided with a tool rest assembly for cutting a rock stratum, and the cutting end face is provided with a mud discharge port;
the mud-water assembly is arranged in the cutting shell and is provided with a water inlet pipeline for connecting an external water source and a mud discharge pipeline for discharging mud water, and one end of the mud discharge pipeline is connected with the mud discharge port and is used for maintaining the pressure balance of the mud water in the cutting shell;
the chip removal assembly is arranged in the cutting shell and used for discharging crushed rock cut by the tool rest assembly to the outside of the cutting shell; and
the power assembly is used for driving the tool rest assembly to cut and drive the rock stratum, the chip removal assembly discharges the broken rock, and the power assembly is controlled by the control system.
8. The method for pipe jacking construction of urban rock stratums according to the claim 1, wherein after the switching mechanism is set, a concrete pipe is set between the jacking mechanism and the fracturing mechanism or the tunneling mechanism, so that one end of the concrete pipe is sleeved with the jacking mechanism, and the other end of the concrete pipe is sleeved with the fracturing mechanism or the tunneling mechanism.
9. The method for pipe jacking construction according to claim 8, wherein after the switching mechanism is set, a slide rail is set along the length direction of the base, so that the concrete pipe, the fracturing mechanism and the tunneling mechanism are respectively set on the slide rail and can slide along the slide rail.
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| CN201911272700.5A CN111119917B (en) | 2019-12-12 | 2019-12-12 | Urban rock stratum mud-water balance pipe jacking construction method |
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| KR20000066552A (en) * | 1999-04-19 | 2000-11-15 | 이계철 | Two way microtunnelling apparatus using sliding rails |
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