CN112343613A - Construction method combining shield method and spray anchor support - Google Patents
Construction method combining shield method and spray anchor support Download PDFInfo
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- CN112343613A CN112343613A CN202011025593.9A CN202011025593A CN112343613A CN 112343613 A CN112343613 A CN 112343613A CN 202011025593 A CN202011025593 A CN 202011025593A CN 112343613 A CN112343613 A CN 112343613A
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- 238000010276 construction Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000007921 spray Substances 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 85
- 239000010959 steel Substances 0.000 claims abstract description 85
- 230000005641 tunneling Effects 0.000 claims abstract description 27
- 239000004567 concrete Substances 0.000 claims abstract description 25
- 238000005065 mining Methods 0.000 claims abstract description 10
- 239000002893 slag Substances 0.000 claims abstract description 5
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 4
- 239000011435 rock Substances 0.000 claims description 22
- 239000002689 soil Substances 0.000 claims description 20
- 239000011378 shotcrete Substances 0.000 claims description 9
- 238000005553 drilling Methods 0.000 claims description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
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Classifications
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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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
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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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
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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
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
- E21D9/087—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face 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
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to a construction method combining a shield method and a spray anchor support, which comprises the following steps: the method comprises the following steps: selecting a shield machine to carry out forward tunneling and slag removal; step two: temporarily supporting a steel pipe piece, and synchronously pouring concrete; step three: determining the segment dismounting position by combining the tunneling speed and the whole length of the shield tunneling machine, and ensuring that the concrete has enough time for curing; step four: a duct piece dismounting machine for dismounting the steel duct piece is arranged at the shield tail position of the shield tunneling machine and used for peeling the steel duct piece from the tunnel wall, and the dismounted duct piece is conveyed to the tail of the main machine for cyclic utilization; step five: connecting a spray anchor support; the steel pipe pieces spliced by the special wedge-shaped pipe pieces are more convenient to mount and dismount, can be recycled, and saves cost. The shield method is adopted to connect the spray anchor support, so that the method is safer and more reliable, and the gap of the shield method applied to the mining roadway construction direction is filled.
Description
Technical Field
The invention relates to the technical field of mine roadway support, in particular to a construction method combining a shield method and a spray anchor support.
Background
The shield method is a mature construction method in the field of underground excavation construction at present, has the advantages of high tunneling speed, small ground disturbance, low noise and the like, can be used for various complex stratums, is almost blank for mining roadway construction, and has the main reason that the conventional shield method adopts a whole-course pipe jacking mode to propel forwards, is generally applied to subways, highways and railway tunnels to ensure the service life of the tunnel, is generally short in service life of the mining roadway, has high cost due to the use of the pipe in the whole course, and has certain influence on the subsequent goaf treatment, so the shield method is not widely applied to the field of mining roadway construction.
In the prior art, because the service cycle of a mine roadway is short, temporary supports such as anchor spraying and the like are mostly adopted, and the safety and the reliability of the temporary supports are particularly important in the whole tunneling process. At present, there are many construction methods for mining roadways, and the construction methods can be roughly divided into two types. One type is fully-mechanized excavation (mechanical method), which is also the most widely applied construction method at present, and the method comprises the steps of breaking rocks by using a fully-mechanized excavating machine, then carrying out slag removal by using a belt conveyor and other equipment, arranging an anchor net at the rear, and fixing by using an anchor rod and an anchor cable to form a temporary support. However, the method has larger empty-roof distance, so the requirement on the stability of surrounding rocks is relatively higher, and when the method is used for dealing with a broken zone and a fractured zone, rockfall and collapse accidents also happen occasionally, so higher potential safety hazards exist; the other method is blasting excavation (mining method), and the method is gradually eliminated at present due to the existence of various adverse factors such as complex construction process, more construction personnel, high labor intensity, severe environment, difficulty in controlling the shape of the chamber and the like.
Disclosure of Invention
Technical problem to be solved
In view of the defects and shortcomings of the prior art, the invention provides a construction method combining a shield method and a spray anchor support, the construction method combines a shield machine and the spray anchor temporary support, forms the temporary support by assembling special steel pipe sheets, carries out synchronous grouting at the tail of a shield, injects concrete into a gap between surrounding rocks and the steel pipe sheets, simultaneously sets steel pipe sheet dismounting equipment at a distance behind the equipment, timely conveys the steel pipe sheets dismounted from the temporary steel pipe sheets to the front for recycling, and carries out subsequent spray anchor temporary support on the basis of the formed concrete support layer.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
the embodiment of the invention provides a construction method combining a shield method and a spray anchor support, which comprises the following steps:
the method comprises the following steps: tunneling by a shield tunneling machine;
selecting a shield machine to carry out forward tunneling and slag removal;
step two: temporarily supporting a steel pipe piece, and synchronously pouring concrete;
a segment erector is arranged at the shield tail of the shield tunneling machine to install steel segments, when the shield tunneling machine is pushed forwards, concrete is injected into a gap through a grouting pipeline between the steel segments at the shield tail and surrounding rocks, and the gap is filled with the concrete and then forms temporary support with the steel segments;
step three: curing the concrete;
determining the segment dismounting position by combining the tunneling speed and the whole length of the shield tunneling machine, and ensuring that the concrete has enough time for curing;
step four: disassembling the steel pipe piece;
a duct piece dismounting machine for dismounting the steel duct piece is arranged at the shield tail position of the shield tunneling machine and used for peeling the steel duct piece from the tunnel wall, and the dismounted duct piece is conveyed to the tail of the main machine for cyclic utilization;
step five: connecting a spray anchor support;
and connecting the jumbolter equipment behind the segment disassembling machine, and performing subsequent spray anchor support below the formed relatively safe concrete retaining wall by an operator.
Step six: and repeating the steps from one to five until the construction is finished.
Optionally, in the step one, a main drive in a front shield of the shield machine is driven by a motor to rotate a cutter head, a hob arranged on the cutter head cuts rock and soil, and a main thrust cylinder in the middle shield is supported on a full-coverage steel pipe piece with roadway width, which is well attached to a rock wall, and is pushed forwards by means of a reaction force.
Optionally, in the step one, the cut waste soil enters a soil bin in the cutter disc through an opening in the cutter disc, the waste soil in the soil bin is transported to a scraper conveyor on the trolley through a screw conveyor, transported to the tail of the trolley through the scraper conveyor, and transported out of the roadway through a waste soil truck at the tail of the trolley.
Optionally, in the second step, specifically, the segment erector located behind the tail shield installs scattered wedge-shaped segments into a ring of steel segments after the tail shield, the grouting system located on the trolley injects special slurry between the steel segments and the rock wall, the rock wall is supported by the steel segments, construction equipment and constructors are protected, the steel segments are disassembled by the segment disassembling machine located at the tail of the trolley, the steel segment transportation system is transported to the vicinity of the segment erector by the segment disassembling machine at the tail of the trolley, the steel segments are recycled, and after the steel segments are disassembled, the anchor rod drilling machine and the mining support equipment behind the segment disassembling machine are used for forming temporary support of the traditional roadway.
Optionally, the segment erector in the second step is used for grabbing, hoisting and placing the specially-made tunnel steel segment, the segment erector is installed on the rear support inside the middle shield, and the longitudinal movement, radial movement, transverse movement, rotation, front-back, left-right and horizontal posture adjustment actions of the installed steel segment are realized through the proportional control of the action of the actuating mechanism, so that the steel segment can be quickly and accurately positioned and installed, and the tunnel rock wall is supported in all directions by the steel segment degree.
Optionally, the steel section of jurisdiction is annular section of jurisdiction, the circumferencial direction of annular section of jurisdiction is formed by the concatenation of a plurality of non-equidimension wedge section of jurisdiction, circumferencial direction between the wedge section of jurisdiction and axial direction all through arc bolt fastening between the annular section of jurisdiction.
Optionally, the wedge-shaped pipe sheet is further provided with a grouting hole.
Optionally, when the steel pipe piece is installed on the pipe piece erector, the wedge-shaped pipe pieces are spliced from large to small;
when the pipe piece dismounting machine is used for dismounting the steel pipe piece, the wedge-shaped pipe piece is dismounted from small to large.
Optionally, the bolting and shotcrete in the fifth step includes the following steps: and (3) measuring the position of the anchor rod, placing the anchor rod drilling machine in place, driving the anchor rod into the designed depth, laying a reinforcing steel bar mesh, welding the reinforcing steel bar with the anchor rod, and spraying concrete and carrying out pressure grouting on the anchor rod body.
(III) advantageous effects
The invention has the beneficial effects that: according to the construction method combining the shield method and the spray anchor support, the steel duct pieces are spliced by adopting the special wedge-shaped duct pieces, so that the duct piece assembling machine and the duct piece disassembling machine are more convenient to assemble and disassemble. The steel pipe piece can be detached and conveyed to the front for recycling, so that the cost is saved. The invention adopts the shield method to connect the spray anchor support, is safer and more reliable, and fills the gap of the shield method applied to the mining roadway construction direction.
Drawings
FIG. 1 is a flow chart of the construction method of the present invention;
FIG. 2 is a schematic view of the segment erector of the present invention operating in a roadway;
FIG. 3 is a schematic view of the present invention showing the relationship between the segment remover and the jumbolter;
FIG. 4 is a schematic illustration of the operation of the jumbolter of the present invention;
FIG. 5 is a front view of a steel segment after splicing of a wedge-shaped segment according to the present invention;
FIG. 6 is a top view of a steel segment after splicing of wedge segments according to the present invention;
FIG. 7 is a schematic view of a wedge-shaped segment of the present invention.
[ description of reference ]
1: a steel pipe piece; 11: a wedge-shaped segment;
2: a segment erector;
3: a segment detacher;
4: jumbolter.
Detailed Description
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Example 1: according to the invention, a segment erector 2 is arranged at the rear part of a tail shield of a shield tunneling machine, as shown in figure 2, a cylindrical steel segment 1 is spliced to form a cylinder, when the shield tunneling machine is pushed forwards, concrete is injected into a gap through a grouting pipeline between the steel segment 1 of the tail shield and surrounding rocks, and the gap and the steel segment 1 form a temporary support after being filled fully. The shield constructs about 80 meters of machine walking, or at complete machine equipment afterbody, sets up the section of jurisdiction unloader 3 that can dismantle steel section of jurisdiction 1, treats that the concrete strength is enough the time, pulls down interim steel section of jurisdiction 1 and transports to the place ahead recycle, arranges the spray anchor equipment at the shield structure machine rear immediately.
Specifically, referring to fig. 1 to 7, an embodiment of the present invention provides a construction method combining a shield method and a spray anchor support, including the following steps:
the method comprises the following steps: tunneling by a shield tunneling machine;
selecting a shield machine to carry out forward tunneling and slag removal;
in the first step, a main drive in a front shield of the shield machine is driven by a motor to rotate a cutter head, a hob arranged on the cutter head cuts rock and soil, and a main thrust cylinder in the middle shield is supported on a 360-degree full-coverage steel pipe piece 1 which is well attached to a tunnel on a rock wall and is pushed forwards by virtue of a reaction force.
Further, steel section of jurisdiction 1 is annular section of jurisdiction, and the circumferencial direction of annular section of jurisdiction is formed by the concatenation of the wedge section of jurisdiction 11 of a plurality of non-uniform size, all fixes through the arc bolt between the wedge section of jurisdiction 11 of circumferencial direction and between the annular section of jurisdiction of axial direction. The wedge-shaped pipe piece 11 is also provided with grouting holes.
In the first step, the cut residue soil enters a soil bin in the cutter head through an opening on the cutter head, the residue soil in the soil bin is conveyed to a scraper conveyor on the trolley through a spiral conveyor, conveyed to the tail of the trolley through the scraper conveyor and conveyed out of a roadway through a residue soil truck at the tail of the trolley.
Step two: temporarily supporting a steel pipe piece 1, and synchronously pouring concrete;
the shield tail of the shield machine is provided with a segment erector 2 for mounting a steel segment 1, the forward propelling force of the shield machine is met by fully considering the friction force with the underground wall during design, and the shield machine is convenient to detach. When the shield tunneling machine is pushed forwards, concrete is injected into the gap through a grouting pipeline between the shield tail steel pipe piece 1 and surrounding rocks, and the gap is filled with the concrete and then forms temporary support with the steel pipe piece 1.
In the second step, specifically, the segment erector 2 behind the tail shield installs scattered wedge-shaped segments 11 behind the tail shield to form a ring of steel segments 1, the grouting system on the trolley injects special slurry between the steel segments 1 and the rock wall, the rock wall is supported by the steel segments 1, construction equipment and constructors are protected, the steel segments 1 are disassembled by the segment disassembling machine 3 at the tail of the trolley, the steel segments 1 are transported to the vicinity of the segment erector 2 by the steel segment 1 transportation system through the tail segment disassembling machine 3, the steel segments 1 are recycled, and after the steel segments 1 are disassembled, the anchor drilling machine 4 behind the segment disassembling machine 3 and the mining support equipment are used for forming temporary support of a traditional roadway.
And the segment erector 2 in the step two is used for grabbing, hoisting and placing the special tunnel steel segment 1, is arranged on the rear support in the middle shield, and realizes the longitudinal movement, radial movement, transverse movement, rotation, front and back, left and right and horizontal posture adjustment actions of the steel segment 1 through the proportional control of the action of the actuating mechanism, so that the steel segment 1 can be quickly and accurately positioned and installed, and the tunnel rock wall can be supported in a 360-degree all-dimensional manner by the steel segment.
Further, when the steel duct piece 1 is installed on the duct piece erector 2, the wedge-shaped duct pieces 11 are spliced from large to small; when the segment remover 3 removes the steel segment 1, the wedge-shaped segment 11 is removed from small to large.
Step three: curing the concrete;
determining the segment dismounting position by combining the tunneling speed and the whole length of the shield tunneling machine, and ensuring that the concrete has enough time for curing;
step four: disassembling the steel pipe piece 1;
a segment dismounting machine 3 for dismounting the steel segment 1 is arranged at the position of about 80 meters of the shield tail of the shield tunneling machine and is used for peeling the steel segment 1 from the tunnel wall, and the dismounted segment is conveyed to the tail of the main machine for cyclic utilization;
step five: connecting a spray anchor support;
and (3) connecting the anchor rod drilling machine 4 equipment behind the segment dismounting machine 3, and performing subsequent spray anchor support below the formed relatively safe concrete retaining wall by an operator.
The spray anchor support in the fifth step comprises the following steps: and (3) measuring the position of the anchor rod, putting the anchor rod into place by the anchor rod drilling machine 4, driving the anchor rod into the designed depth, laying a reinforcing steel bar mesh, welding the reinforcing steel bar and the anchor rod, and spraying concrete and carrying out pressure grouting on the anchor rod body.
Step six: and repeating the steps from one to five until the construction is finished.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; either as communication within the two elements or as an interactive relationship of the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, a first feature may be "on" or "under" a second feature, and the first and second features may be in direct contact, or the first and second features may be in indirect contact via an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lower level than the second feature.
In the description herein, the description of the terms "one embodiment," "some embodiments," "an embodiment," "an example," "a specific example" or "some examples" or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments without departing from the scope of the present invention.
Claims (9)
1. A construction method combining a shield method and a spray anchor support is characterized in that: the method comprises the following steps:
the method comprises the following steps: selecting a shield machine to carry out forward tunneling and slag removal;
step two: a segment erector (2) is arranged at the shield tail of the shield machine to install the steel segment (1), when the shield machine is pushed forwards, concrete is injected into the gap through a grouting pipeline between the steel segment (1) at the shield tail and surrounding rocks, and the gap and the steel segment (1) form temporary support after being filled with the concrete;
step three: determining the segment dismounting position by combining the tunneling speed and the whole length of the shield tunneling machine, and ensuring that the concrete has enough time for curing;
step four: a duct piece dismounting machine (3) for dismounting the steel duct piece (1) is arranged at the shield tail position of the shield tunneling machine and used for peeling the steel duct piece (1) from the tunnel wall, and the dismounted duct piece is conveyed to the tail part of the main machine for cyclic utilization;
step five: and connecting the anchor rod drilling machine (4) equipment behind the segment disassembling machine (3), and performing subsequent spray anchor support below the formed concrete retaining wall.
Step six: and repeating the steps from one to five until the construction is finished.
2. The construction method of claim 1, wherein the shield method is combined with a shotcrete support, and the construction method comprises the following steps:
in the first step, a main drive in a front shield of the shield machine is driven by a motor to rotate a cutter head, a hob arranged on the cutter head cuts rock and soil, and a main thrust cylinder in the middle shield is supported on a 360-degree full-coverage steel pipe piece (1) of a roadway attached to a rock wall and is pushed forwards by virtue of a reaction force.
3. The construction method of claim 1, wherein the shield method is combined with a shotcrete support, and the construction method comprises the following steps:
in the first step, the cut residue soil enters a soil bin in the cutter head through an opening in the cutter head, the residue soil in the soil bin is conveyed to a scraper conveyor on the trolley through a spiral conveyor, the residue soil is conveyed to the tail of the trolley through the scraper conveyor, and then the residue soil is conveyed out of the roadway through a residue soil truck at the tail of the trolley.
4. The construction method of claim 1, wherein the shield method is combined with a shotcrete support, and the construction method comprises the following steps:
in the second step, the segment erector (2) behind the tail shield installs scattered wedge-shaped segments (11) behind the tail shield to form a ring of steel segments (1), a grouting system on the trolley injects special slurry between the steel segments (1) and the rock wall, the rock wall is supported by the steel segments (1), the steel segments (1) are disassembled by a segment disassembling machine (3) at the tail of the trolley, the steel segments (1) are transported to the position near the segment erector (2) by a segment disassembling machine (3) at the tail of the trolley by a transportation system of the steel segments (1), so that the steel segments (1) are recycled, and after the steel segments (1) are disassembled, a conventional temporary support is formed by using a roof-bolter (4) behind the segment disassembling machine (3) and a mining support device.
5. The construction method of claim 1, wherein the shield method is combined with a shotcrete support, and the construction method comprises the following steps:
and the segment erector (2) in the second step is used for grabbing, hoisting and placing the special tunnel steel segment (1), is arranged on the rear support inside the middle shield, and realizes the longitudinal movement, radial movement, transverse movement, rotation, front and back, left and right and horizontal posture adjustment actions of the installed steel segment (1) through the proportional control of the action of the actuating mechanism, so that the steel segment (1) can be quickly and accurately positioned and installed, and the tunnel rock wall can be supported by the steel segment (1) in a 360-degree all-dimensional manner.
6. The construction method of claim 1, wherein the shield method is combined with a shotcrete support, and the construction method comprises the following steps:
steel section of jurisdiction (1) is annular section of jurisdiction, the circumferencial direction of annular section of jurisdiction is formed by the concatenation of a plurality of non-equidimension wedge section of jurisdiction (11), the circumferencial direction between wedge section of jurisdiction (11) and axial direction all through arc bolt fastening between the annular section of jurisdiction.
7. The construction method of claim 6, wherein the shield method is combined with a shotcrete support, and the construction method comprises the following steps:
and the wedge-shaped duct piece (11) is also provided with grouting holes.
8. The construction method of claim 6, wherein the shield method is combined with a shotcrete support, and the construction method comprises the following steps:
when a steel segment (1) is installed on the segment erector (2), the wedge-shaped segments (11) are spliced from large to small;
when the pipe piece dismounting machine (3) is used for dismounting the steel pipe piece (1), the wedge-shaped pipe piece (11) is dismounted from small to large.
9. The construction method of claim 1, wherein the shield method is combined with a shotcrete support, and the construction method comprises the following steps:
the spray anchor support in the fifth step comprises the following steps: and (3) measuring the position of the anchor rod, putting the anchor rod into place by the anchor rod drilling machine (4), driving the anchor rod into the designed depth, laying a reinforcing steel bar mesh, welding the reinforcing steel bar and the anchor rod, and spraying concrete and carrying out pressure grouting on the anchor rod body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011025593.9A CN112343613A (en) | 2020-09-25 | 2020-09-25 | Construction method combining shield method and spray anchor support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011025593.9A CN112343613A (en) | 2020-09-25 | 2020-09-25 | Construction method combining shield method and spray anchor support |
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| Publication Number | Publication Date |
|---|---|
| CN112343613A true CN112343613A (en) | 2021-02-09 |
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|---|---|---|---|
| CN202011025593.9A Pending CN112343613A (en) | 2020-09-25 | 2020-09-25 | Construction method combining shield method and spray anchor support |
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| CN (1) | CN112343613A (en) |
Cited By (2)
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