CN111271070A - Grid pipe jacking machine and construction method - Google Patents
Grid pipe jacking machine and construction method Download PDFInfo
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- CN111271070A CN111271070A CN202010237292.6A CN202010237292A CN111271070A CN 111271070 A CN111271070 A CN 111271070A CN 202010237292 A CN202010237292 A CN 202010237292A CN 111271070 A CN111271070 A CN 111271070A
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- grid
- pipe body
- pipe
- push bench
- tunnel
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- 238000010276 construction Methods 0.000 title claims abstract description 20
- 239000011435 rock Substances 0.000 claims abstract description 52
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 230000005641 tunneling Effects 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 2
- 229910003460 diamond Inorganic materials 0.000 claims 1
- 239000010432 diamond Substances 0.000 claims 1
- 239000011440 grout Substances 0.000 claims 1
- 210000003734 kidney Anatomy 0.000 claims 1
- 230000032258 transport Effects 0.000 abstract description 8
- 229910000831 Steel Inorganic materials 0.000 abstract description 6
- 239000010959 steel Substances 0.000 abstract description 6
- 239000007787 solid Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 210000004907 gland Anatomy 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- 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
- E21D9/0873—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 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
- 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
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
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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
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a grid push bench which comprises a rock breaking device for breaking rocks, a grid pipe body and a pushing device for pushing the grid pipe body into an excavated tunnel, wherein the rock breaking device, the grid pipe body and the pushing device are sequentially arranged, a through cavity is formed in the middle of the grid pipe body, and a plurality of open holes for mounting permanent supporting devices are formed in the pipe wall of the grid pipe body. The invention also provides a construction method adopting the grating push bench, and the invention has the beneficial effects that: the grid body is the cavity structure, compares traditional concrete segment or solid steel pipe piece, and is more light, transports more in a flexible way, has reduced requirement and body cost of transportation to transportation equipment, and grid body reuse, and construction cost is low.
Description
Technical Field
The invention relates to mining equipment and a construction method, in particular to a push bench and a construction method.
Background
At present, a push bench adopts a closed cylindrical pipe body to provide support for a tunnel and provides jacking force for excavation equipment (a push bench host). After the tunnel is excavated, the pipe body is left in the tunnel to be used as a supporting device. Traditional pipe jacking machine is used for excavating the tunnel in the soil layer more, and to hard rock stratum, the rock has higher intensity and better self-supporting ability, uses stock, anchor rope or slip casting process alright satisfy the demand that the tunnel was strutted, need not to adopt closed cylindric body to strut.
Application No.: 201720024519.2 discloses a hard rock push bench, including cutting blade disc, broken storehouse and casing, the back connection of the front end in broken storehouse and cutting blade disc, the end in broken storehouse is connected with the front end of casing, its characterized in that: the cutting device also comprises a plurality of hobbing cutters, wherein the hobbing cutters are arranged on the front surface of the cutting cutterhead; the hob comprises a hob shaft, a hob body, an annular gland, a hob sealing ring, a gland adjusting bolt and a hob body mounting flange, wherein the hob body is of a circular structure, and the outer side of the hob body is provided with the hob ring; the side wall of the cutter body mounting flange is sequentially provided with a gland mounting step surface, a sealing ring mounting step surface and a cutter body limiting convex edge, the annular gland is fixed on the gland mounting step surface through the gland adjusting bolt, and the hob sealing ring is sleeved on the sealing ring mounting step surface and tightly attached to the annular gland; the inner side of the cutter body is symmetrically provided with a rolling limit step surface and a roller movable step surface from two ends to the middle, the middle part of the cutter shaft is provided with a cutter body mounting convex ring, the cutter body is sleeved on the side wall of the cutter body mounting convex ring, the cutter body mounting flange is mounted at two ends of the cutter body mounting convex ring, and the rolling limit step surface is attached to the cutter body limit convex edge; the cutter body mounting flange and the movable step surface of the roller of the cutter body form a strip-shaped raceway, and the rollers are arranged in the two strip-shaped raceways; the cutter body and the cutter body mounting convex ring are provided with ball movable arc-shaped grooves, and the two ball movable arc-shaped grooves are opposite, so that a spherical roller path is formed between the cutter body and the cutter shaft and is arranged between the two strip-shaped roller paths, and the balls are arranged in the spherical roller path; still include hydraulic motor and central pivot, hydraulic motor sets up in the inside of casing, hydraulic motor's output shaft passes through central pivot and cutting blade disc are connected, hydraulic motor drive cutting blade disc is rotatory. The pipe jacking machine is a closed pipe body, the structure is complex, the machine body is overweight, the cost of transportation, materials and the like is too high, and the application of the pipe jacking machine in the tunneling of the hard rock stratum is influenced.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to solve among the prior art, to the rock that has higher intensity, closed pipe pushing jack material cost is high, the too high problem of cost of transportation.
The invention solves the technical problems through the following technical means:
the grid pipe jacking machine comprises rock breaking equipment for breaking rock, a grid pipe body and a pushing device used for pushing the grid pipe body to an excavated tunnel, wherein the rock breaking equipment, the grid pipe body and the pushing device are sequentially arranged, a through cavity is formed in the middle of the grid pipe body, and the pipe wall of the grid pipe body is provided with a plurality of open pores used for installing a permanent supporting device.
According to the invention, the grid push bench crushes rocks through the rock crushing equipment, the pushing device continuously pushes the grid pipe body into the tunnel, the rock crushing equipment and the grid pipe body advance, the grid pipe body can be used as a temporary support of the tunnel after entering the tunnel, the safety of the tunnel support is ensured, a permanent support device such as an anchor rod, an anchor cable, a grouting pipe and the like can be installed into a rock body from the opening of the grid pipe body, and after the permanent support device is installed, the grid pipe body is reserved or removed as required; the grid body is the cavity structure, compares traditional concrete segment or solid steel pipe piece, and is more light, transports more in a flexible way, has reduced requirement and body cost of transportation to transportation equipment, and grid body reuse, and construction cost is low.
Preferably, the grid pipe body comprises a plurality of pipe pieces which are connected end to end.
Preferably, the side surface of the pipe piece is provided with a connecting hole, and the adjacent pipe pieces can be detachably connected through a fastener and the connecting hole. The pipe-jacking grid pipe body can be disassembled into a plurality of pipe pieces, so that the pipe pieces are convenient to transport, assemble and replace.
Preferably, the number of the pipe pieces is more than three.
Preferably, the grid pipe bodies are multiple, and adjacent grid pipe bodies are detachably connected. The length can be assembled according to needs, the use is more flexible, each section of pipe body at the position can be connected or not connected, the pipe bodies are extruded together under the thrust of the pushing device and are not loosened, and if the stability of the grid pipe body has higher requirements, holes can be punched on the contact surfaces of the adjacent pipe bodies and are connected by bolts or other fasteners.
Preferably, the outer contour of the grid pipe body is consistent with the shape of the tunneling section of a roadway or a tunnel. Can be attached to the cross section, and the reliability of support is ensured.
Preferably, the open holes are one or a combination of round, square, rectangular, diamond-shaped and kidney-shaped holes. The pipe body is not limited to the shape of the opening, and can be directly contacted with the surrounding rock surface of the roadway in the pipe body as long as the opening or the gap is met, so that the installation of supporting materials such as anchor rods and anchor cables is not influenced.
Preferably, the permanent support device is one or a combination of an anchor rod, an anchor cable and a grouting pipe.
Preferably, the device further comprises a reaction wall for bearing propelling reaction force during tunneling, the reaction wall is located at one end, away from the grid pipe body, of the pushing device, and the pushing device abuts against the reaction wall.
The invention also provides a construction method adopting the grid push bench, which comprises the following steps: the hob at the front end of the rock breaking equipment breaks rocks, the pushing device continuously pushes one or more grid tubes into the tunnel in sequence, the pushing device pushes the grid tubes and the rock breaking equipment to move forward until tunneling work of the tunnel is completed, the permanent supporting device is installed into a rock body from the open hole of the grid tubes, and after the permanent supporting device is installed, the grid tubes are reserved as supports or removed to be transported out of the tunnel.
The invention has the advantages that:
(1) according to the invention, the grid push bench crushes rocks through the rock crushing equipment, the pushing device continuously pushes the grid pipe body into the tunnel, the rock crushing equipment and the grid pipe body advance, the grid pipe body is used as a temporary support of the tunnel after entering the tunnel, the safety of the tunnel support is ensured, a permanent support device such as an anchor rod, an anchor cable, a grouting pipe and the like can be installed into a rock body from an opening of the grid pipe body, and after the permanent support device is installed, the grid pipe body is reserved or removed as required; the grid pipe body is of a cavity structure, and compared with a traditional concrete pipe piece or a solid steel pipe piece, the grid pipe body is lighter and more flexible to transport, the requirements on transport equipment and the pipe body transport cost are reduced, the grid pipe body can be recycled, and the construction cost is low;
(2) the pipe-jacking grid pipe body can be disassembled into a plurality of pipe pieces, so that the pipe pieces are convenient to transport, assemble and replace;
(3) the adjacent grid pipe bodies can be detachably connected, the required length can be assembled according to the requirement, and the use is more flexible;
(4) the outer contour of the grid pipe body is consistent with the shape of the tunneling section of a roadway or a tunnel, and can be attached to the tunneling section, so that the supporting reliability is guaranteed.
(5) The construction method is simple and easy to operate and has strong popularization.
Drawings
FIG. 1 is a schematic structural diagram of a grid push bench according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a second grid pipe according to an embodiment of the present invention;
FIG. 3 is a schematic view of the construction of a tube sheet;
FIG. 4 is a schematic view of a construction step I of the grid pipe jacking machine;
FIG. 5 is a schematic view of a second construction step of the grid pipe jacking machine;
FIG. 6 is a schematic diagram of the construction steps of the grid pipe jacking machine;
FIG. 7 is a fourth schematic view of construction steps of the grid pipe jacking machine;
FIG. 8 is a schematic diagram of the construction steps of the grid pipe jacking machine.
Reference numbers in the figures: the device comprises a rock breaking device 1, a grating pipe body 2, an opening 21, a pipe piece 22, a connecting hole 221, a pushing device 3, an anchor rod 4 and a reaction wall 5.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1, the grid pipe jacking machine comprises a rock breaking device 1 for breaking rocks, a grid pipe body 2 and a pushing device 3 for pushing the grid pipe body into an excavated tunnel, wherein the rock breaking device 1, the grid pipe body 2 and the pushing device 3 are sequentially arranged;
the front side of the rock breaking device 1 is provided with a hob for breaking rock, the rock breaking device 1 in the embodiment can refer to the rock breaking device in the prior art, and is provided with a power output device, such as a hydraulic motor and the like, and the hydraulic motor drives the hob to rotate to realize cutting.
The middle part of the grid pipe body 2 is a through cavity, and the pipe wall of the grid pipe body 2 is provided with a plurality of openings 21 for installing permanent supporting devices. The grid pipe body 2 in this embodiment includes a plurality of annular connecting plates, a plurality of cylindrical connecting rods, and a plurality of annular connecting plates interval arrangement, a plurality of even connections of cylindrical connecting rod are on adjacent annular connecting plate, form the trompil 21 of rectangle between the cylindrical connecting rod.
Wherein the annular connecting plate can be formed by a plurality of arc connecting plates, and the arc connecting plate interval sets up, and cylindrical connecting rod is connected between the arc connecting plate, constitutes a subassembly, later is a loop forming element with the subassembly concatenation, also can be convenient for assemble and dismantle.
As shown in fig. 4 and 5, the plurality of grid tubes 2 may be connected or disconnected with each other, the length of each grid tube 2 may be as long as required, and the grid tubes may be used more flexibly, and each grid tube 2 is pressed together under the thrust of the pushing device 3, so as to prevent the grid tubes from loosening.
As shown in fig. 4 to 8, in the embodiment, the grid pipe jacking machine crushes rocks through the rock crushing device 1, the pushing device 3 continuously pushes the grid pipe body 1 into the tunnel, so that the rock crushing device 1 and the grid pipe body 2 advance, the grid pipe body 2 is used as a temporary support for the tunnel after entering the tunnel, so that the safety of the tunnel support is ensured, and permanent support devices such as anchor rods 4, anchor cables, grouting pipes and the like can be installed into the rock body from the open holes 21 of the grid pipe body 2, after the permanent support devices are installed, the grid pipe body is reserved as required, or the rock conditions are better, only the permanent support devices are reserved to ensure the support, so that the grid pipe body 2 can be detached; grid body 2 is the cavity structure, compares traditional concrete segment or solid steel pipe piece, and is more light, transports more in a flexible way, has reduced requirement and body cost of transportation to transportation equipment, and grid body reuse, and construction cost is low.
Example two:
as shown in fig. 2 and 3, the second embodiment of the present invention is different from the first embodiment of the present invention in the structure of the grill body;
the grid pipe body 2 comprises a plurality of pipe pieces 22, and the plurality of pipe pieces 22 are connected end to end. In this embodiment, section of jurisdiction 22 is the arc structure of central angle for 90 degrees, and grid body 2 is formed by the equipment of four arc structure end to end, and the arc is structural to have a plurality of circular trompils 21, and the side has connecting hole 221, and adjacent section of jurisdiction 22 is through the connection that fastener and connecting hole can be dismantled, disassembles push pipe grid body 2 into several sections of jurisdiction 22, and the transportation of being convenient for, equipment, it is convenient to change.
The outer contours of the grid pipe bodies 2 in the first and second embodiments are all cylindrical, but the grid pipe bodies are not limited to the cylindrical outer contours, and the grid pipe bodies can also be rectangular as long as the outer contours of the grid pipe bodies are consistent with the shape of the tunneling section of the roadway or the tunnel.
In addition, the opening 21 may be a diamond-shaped or kidney-shaped opening. The shape of the opening 21 is not limited, and the grid pipe body 2 can be directly contacted with the surrounding rock surface of the roadway without affecting the installation of supporting materials such as the anchor rods 4 and anchor cables as long as the opening or the gap is formed.
Similarly, the distance of the opening 21 is the distance required for installing the anchor rod 4 and the anchor cable, for example; the permanent supporting structure is anchor rods 4, the row spacing is 1m, and the spacing of the openings or gaps of the grid pipe body is at least 1 m.
Wherein, the permanent support device is one or the combination of an anchor rod 4, an anchor cable and a grouting pipe.
Example three:
as shown in fig. 1, in addition to the first embodiment, the grid pipe jacking machine further includes a reaction wall 5 for receiving a thrust reaction force during excavation, the reaction wall 5 is located at one end of the pushing device 3 away from the grid pipe body 2, and the pushing device 3 abuts against the reaction wall 5.
The reaction wall is positioned at the starting position of the tunneling equipment and is perpendicular to the tunneling direction, so that pushing reaction force is provided for the propelling device. In this embodiment, the propulsion device 3 is a propulsion cylinder, the tail of the propulsion cylinder is supported on the reaction wall, the head of the propulsion cylinder is used for pushing the tail of the grid pipe body 2, and the grid pipe bodies 2 are closely arranged to transmit the propulsion force to the rock breaking equipment 1.
The reaction wall is not limited to a specific structure, and may be any structure that can withstand the thrust reaction during excavation and does not cause large deformation or damage. If the initial position has a vertical rock surface, reinforcing the rock surface by using a steel plate or concrete as a counterforce wall; if no vertical rock surface exists nearby, a stable steel structure or a concrete pouring counterforce wall structure needs to be erected.
The invention also provides a construction method adopting the grid push bench, which comprises the following steps:
as shown in fig. 4, step one: a hob at the front end of the rock breaking equipment 1 breaks rock, a pushing device 3 pushes the tail of the grid pipe body 2 to push a pipe jacking machine to drive forwards, and a counterforce wall provides pushing counterforce;
as shown in fig. 5, step two: after the pushing device 3 extends to the maximum stroke, the pushing device retracts, and the duct pieces 22 are assembled into a grid pipe body 2 and then are placed between the pushing device 3 and the previous section of grid pipe body 2;
as shown in fig. 6, step three: the pushing device 3 continues to push the tail part of the newly added grid pipe body 2 for pushing;
as shown in fig. 7, step four: after the tunnel is tunneled, driving the anchor rod 4 into the rock wall from the opening 21;
as shown in fig. 8, step five: after the anchor rod 4 is installed, the grid pipe body 2 can be selected to be reserved as a support, or the grid pipe body 2 is disassembled into grid pipe pieces 22 and then transported out of the tunnel for repeated use.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The grid pipe jacking machine is characterized by comprising rock breaking equipment for breaking rocks, a grid pipe body and a pushing device for pushing the grid pipe body to an excavated tunnel, wherein the rock breaking equipment, the grid pipe body and the pushing device are sequentially arranged, the middle of the grid pipe body is a through cavity, and the pipe wall of the grid pipe body is provided with a plurality of open pores for installing a permanent supporting device.
2. The grid push bench of claim 1, wherein the grid tube body comprises a plurality of segments, the segments being joined end to end.
3. The grid push bench of claim 2, wherein the segment sides have attachment holes, and adjacent segments are removably attached by fasteners and attachment holes.
4. The grid push bench of claim 2, wherein the number of segments is greater than three.
5. The grid push bench of claim 1, wherein the plurality of grid tubes are removably connected between adjacent grid tubes.
6. The grid push bench of claim 1, wherein the outer profile of the grid tubes conforms to the shape of the roadway or tunnel driving section.
7. The grid push bench of claim 1, wherein the openings are one or a combination of round, square, rectangular, diamond, kidney shaped holes.
8. The grid push bench of claim 1, wherein the permanent support means is one or a combination of anchor rods, anchor cables, and grout tubes.
9. The grid push bench of claim 1, further comprising a reaction wall for withstanding a thrust reaction during tunneling, the reaction wall being located at an end of the pusher remote from the grid pipe, the pusher abutting against the reaction wall.
10. The construction method is characterized in that the construction method which is carried out by adopting the grating pipe jacking machine of any one of the claims 1 to 9 comprises the following steps: the hob at the front end of the rock breaking equipment breaks rocks, the pushing device continuously pushes one or more grid tubes into the tunnel in sequence, the pushing device pushes the grid tubes and the rock breaking equipment to move forward until tunneling work of the tunnel is completed, the permanent supporting device is installed into a rock body from the open hole of the grid tubes, and after the permanent supporting device is installed, the grid tubes are reserved as supports or removed to be transported out of the tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010237292.6A CN111271070A (en) | 2020-03-30 | 2020-03-30 | Grid pipe jacking machine and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010237292.6A CN111271070A (en) | 2020-03-30 | 2020-03-30 | Grid pipe jacking machine and construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111271070A true CN111271070A (en) | 2020-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010237292.6A Pending CN111271070A (en) | 2020-03-30 | 2020-03-30 | Grid pipe jacking machine and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111271070A (en) |
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2020
- 2020-03-30 CN CN202010237292.6A patent/CN111271070A/en active Pending
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