CN109915170B - Construction method for safe entry of rock-rolling high-steep-slope tunnel - Google Patents
Construction method for safe entry of rock-rolling high-steep-slope tunnel Download PDFInfo
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- CN109915170B CN109915170B CN201910201648.8A CN201910201648A CN109915170B CN 109915170 B CN109915170 B CN 109915170B CN 201910201648 A CN201910201648 A CN 201910201648A CN 109915170 B CN109915170 B CN 109915170B
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- 238000010276 construction Methods 0.000 title claims abstract description 66
- 238000005096 rolling process Methods 0.000 title claims abstract description 28
- 230000001681 protective Effects 0.000 claims abstract description 59
- 239000004575 stone Substances 0.000 claims abstract description 27
- 239000011435 rock Substances 0.000 claims abstract description 22
- 239000004567 concrete Substances 0.000 claims abstract description 15
- 230000003014 reinforcing Effects 0.000 claims abstract description 13
- 238000005507 spraying Methods 0.000 claims abstract description 9
- 230000002787 reinforcement Effects 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 33
- 239000010959 steel Substances 0.000 claims description 33
- 230000001174 ascending Effects 0.000 claims description 19
- 238000004891 communication Methods 0.000 claims description 12
- 239000002689 soil Substances 0.000 claims description 7
- 239000011230 binding agent Substances 0.000 claims description 6
- 235000015097 nutrients Nutrition 0.000 claims description 6
- 230000001680 brushing Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 240000000218 Cannabis sativa Species 0.000 claims description 3
- 241000219823 Medicago Species 0.000 claims description 3
- 235000017585 alfalfa Nutrition 0.000 claims description 3
- 235000017587 alfalfa Nutrition 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000008262 pumice Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 2
- 239000007921 spray Substances 0.000 claims 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 239000011378 shotcrete Substances 0.000 description 3
- 230000036536 Cave Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 241000052343 Dares Species 0.000 description 1
- 239000002965 rope Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Abstract
The invention discloses a construction method for safe tunnel entrance of a rock rolling high-steep slope tunnel, which comprises a steep slope active protective net construction step and a double-tunnel entrance construction step: construction of a steep slope active protective net: dividing the steep slope into a plurality of platforms according to the slope of the mountain and the growth condition of miscellaneous tree vegetation, and applying an active protective net to each platform from top to bottom for protection; the double-pipe shed tunnel entering construction step comprises: adopt double-deck pipe canopy to strut in the tunnel, double-deck pipe canopy includes interior pipe canopy and outer tube canopy, and interior pipe canopy and outer tube canopy all include a plurality of pipe and a plurality of reinforcing bar, and the circumferencial direction evenly distributed on a plurality of pipe edge tunnel top, a plurality of pipe utilize reinforcement to connect, lay the reinforcing bar net piece on the reinforcing bar of outer pipe canopy, carry out spraying concrete at last and make reinforcing bar net piece fixed with the reinforcing bar and the pipe of outer tube canopy. The invention ensures that the tunnel is actively protected in a grading way, eliminates the hidden danger of rolling stones, and obviously improves the safety of entering the tunnel by using the double-pipe shed tunnel entering way.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a safe tunnel entering construction method for a rock rolling high-steep slope tunnel.
Background
The entrance point of a common tunnel is positioned at the lower part of a hillside, the shape of the hill is steep, the slope of some hillsides is 70-90 degrees, extremely thin saprophytic soil is covered between the hillsides, a plurality of miscellaneous trees grow on the hillsides, but weathering sandstone cracks are serious, large and small stones roll off frequently, and the rolling marks are bright. The existing method is to brush a slope directly at a 10-30 m cave entrance, a tunnel top ditch is constructed by spraying concrete, a passive flexible protection net piece is constructed at the upper part of the ditch by 5-8 m, the length is about 50m, the height is 6m, and the passive flexible protection net piece is used for preventing rocks from rolling off a mountain, so that the cave entrance can be unfolded for construction. However, in rainy seasons, when large stones roll down on mountains or rock piles slide down intensively, the passive flexible protective net sheets and the sprayed concrete ditches are broken by crashing basically within 3 months, and the due effect of the protective net sheets and the sprayed concrete ditches cannot be exerted. And the underground civil board house is easy to break, no one dares to live in, and the tunnel tunneling construction cannot be normally carried out due to the safety failure. Therefore, in order to overcome the defects, a construction method for eliminating the potential safety hazard of the rolling stones so as to ensure that the tunnel can be safely entered into the hole is urgently needed to be researched.
Disclosure of Invention
The invention aims to provide a construction method for safely entering a tunnel with rolling stones in a high and steep slope, which aims to solve the problems in the prior art, eliminate the hidden danger of rolling stones and improve the safety of entering the tunnel.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a construction method for safe tunnel entrance of a rock rolling high-steep slope tunnel, which comprises a steep slope active protective net construction step and a double-tunnel entrance construction step: construction of a steep slope active protective net: dividing the steep slope into a plurality of platforms according to the slope of the mountain and the growth condition of miscellaneous tree vegetation, and applying an active protective net to each platform from top to bottom for protection; the double-pipe shed tunnel entering construction step comprises: adopt double-deck pipe canopy to strut in the tunnel, double-deck pipe canopy includes interior pipe canopy and outer tube canopy, the outer pipe canopy cover is established in the interior pipe canopy outside, interior pipe canopy and outer tube canopy are arc, interior pipe canopy and outer tube canopy all include a plurality of pipe and a plurality of reinforcing bar, the circumferencial direction evenly distributed on a plurality of pipe edge tunnel top, a plurality of pipe utilizes reinforcement to connect, lay the reinforcing bar net piece on the reinforcing bar of outer tube canopy, it is fixed with the reinforcing bar and the pipe of outer pipe canopy to carry out the spraying concrete at last.
Preferably, in the process of constructing the active protective net, firstly, the pumice live rocks on each platform are cleaned, meanwhile, the trees on the platforms are protected from being damaged, then, the active protective net is constructed, and the length and the height of the active protective net are set by integrating the width of the platforms and the open cut tunnel.
Preferably, the active protective net comprises a plurality of protective net pieces, the specification of the protective net pieces is 4500mm × 4500mm, and a plurality of 200mm × 200mm grids are uniformly distributed on the protective net pieces.
Preferably, after the construction of the active protective net is completed, steel strands are additionally arranged on the active protective net in places with huge dangerous stones, and long anchor cables are arranged to fixedly connect the active protective net with the mountain body on the upward slope.
Preferably, in the construction step of the steep slope active protection net, anchor rods and frame beam frames are constructed at the positions where slope brushing is performed or where miscellaneous tree vegetation grows rarely and rocks are exposed mostly, the frame beam frames are fixed by the anchor rods, the anchor rods adopt threaded steel bars, the frame beam frames with proper sizes are selected according to the slope brushing area or the rock exposed area, the frame beam frames are embedded into the rocks to a certain depth, and then concrete is sprayed in the frame beam frames to fix the frame beam frames.
Preferably, the bottom in the frame girder frame is filled with a binder, then nutrient soil is paved on the binder, and broad-leaf grass and/or alfalfa seeds are selected to be sprayed on the nutrient soil.
Preferably, the length of the outer pipe shed extending out of the tunnel portal is L1 when the outer pipe shed is installed, the length of the inner pipe shed extending out of the tunnel portal is L2 when the inner pipe shed is installed, L2 is larger than L1, the steel bar meshes are also paved on the extending parts of the steel bars of the outer pipe shed and the extending parts of the steel bars of the inner pipe shed, which are longer than the outer pipe shed, and concrete is sprayed to fix the steel bar meshes with the extending parts of the outer pipe shed and the inner pipe shed.
Preferably, the method also comprises the following passive protection construction steps:
① a passive protective net is respectively constructed at a distance from the mountain top villager house downwards and a distance from the top of the tunnel open cut tunnel upwards;
② at the outmost end of the open cut tunnel entrance end, concrete is poured to form arc upwarp eaves, so that the falling rocks at the tunnel top roll down to the two sides of the tunnel main tunnel from the two sides of the open cut tunnel and cannot roll to the tunnel line.
Preferably, the height of the passive protective net is 6000mm, and the length of the passive protective net is 50000-60000 mm.
Preferably, the construction method further comprises an ascending inclined shaft construction step, wherein a planned communication end is arranged on the tunnel main tunnel, an ascending inclined shaft is communicated with the planned communication end on the tunnel main tunnel, the ascending inclined shaft starts construction at a distance from the planned communication end from the right lower side of the tunnel, when the ascending inclined shaft is constructed to a certain distance from the planned communication end, the construction of the ascending inclined shaft is suspended, safety protection is well achieved, and the ascending inclined shaft is communicated with the main tunnel through the tunnel main tunnel construction.
Compared with the prior art, the invention has the following technical effects:
in the construction process of the steep slope active protective net, the steep slope is divided into a plurality of platforms, the active protective nets are arranged in a grading mode, and grading active protection is performed on the tunnel, so that the tunnel is graded actively protected, the hidden danger that rolling stones on the steep slope roll downwards is thoroughly eliminated, meanwhile, a double-pipe shed hole entering mode is adopted, double-pipe sheds are respectively bound and connected with circular pipes through reinforcing steel bars to form an arc-shaped arched shed, the supporting strength in the hole is obviously enhanced, and reinforcing steel bar meshes are laid on the reinforcing steel bars of the outer pipe shed, so that the hole entering safety is obviously improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments 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 structural view of an active protection net in the invention;
FIG. 2 is a partial schematic view of a double-layer pipe shed according to the present invention;
FIG. 3 is a schematic perspective view of a double-layer pipe shed in a tunnel according to the present invention;
FIG. 4 is a schematic structural view of a double-layer pipe shed outside the surrounding rock according to the present invention;
wherein: 1-active protective net, 2-protective net piece, 3-inner pipe shed, 4-outer pipe shed, 5-round pipe, 6-steel bar and 7-steel bar net piece.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-4: the embodiment provides a construction method for safely entering a tunnel in a rock-rolling high and steep slope, which comprises a steep slope active protective net 1 construction step and a double-tunnel entering construction step:
the construction step of the abrupt slope active protective net 1: according to the slope of a mountain and the growth condition of vegetation of miscellaneous trees, dividing a steep slope into a plurality of platforms, and sequentially applying an active protective net 1 to each platform from top to bottom for protection, specifically, in the embodiment, the steep slope is divided into four platforms of 18160mm, 20090mm, 417500mm and 71450mm according to the altitude so as to perform four-level protection of a tunnel; the method comprises the steps of cleaning pumice live rocks on each platform, protecting trees on the platforms from being damaged, constructing the active protection net 1, and setting the length and the height of the active protection net 1 according to the width of the platforms and open cut tunnels, wherein specifically, in the embodiment, the length of the active protection net 1 is 49500mm, and the height of the active protection net is 81000 mm. The active protective net 1 comprises a plurality of protective net pieces 2, the specification of the protective net pieces 2 is 4500mm × 4500mm square net pieces, and a plurality of 200mm × 200mm square grids are uniformly distributed on the protective net pieces 2 to prevent the rolling of small rolling stones. Therefore, the steep slope is divided into four platforms in the embodiment, the active protective nets 1 are arranged in four stages to perform graded active protection on the tunnel, the active protective net 1 of one-stage protection is damaged, and the protective effects of the other active protective nets 1 at all stages are not influenced, so that the tunnel is graded actively protected, and the hidden danger that rolling stones on the steep slope roll down is thoroughly eliminated.
Preferably, after the construction of the active protective net 1 is completed, steel strands can be added to the active protective net 1 in a place where huge dangerous stones exist, long anchor cables are arranged to fixedly connect the active protective net 1 with a mountain body of an upward slope, the distance between the long anchor cables is set to be 1500mm multiplied by 1500mm, and the distance between the steel strands is set to be (1000-1500) mm multiplied by (1000-1500) mm according to the size of the dangerous stones and the platform environment. The use of steel strand wires and long anchor rope strengthens the protective ability that has huge danger stone local area, prevents to roll the stone and to the destruction of initiative protection network 1, makes initiative protection network 1 can normally exert its protective action.
In the construction step of the abrupt slope active protection net 1, anchor rods and frame beam frames can be constructed in places where slope brushing is performed or where miscellaneous tree vegetation grows rarely and rocks are exposed more, namely, a local key protection mode is adopted in severe environment, the frame beam frames are fixed by the anchor rods, the anchor rods preferably use threaded steel bars, the specification of the threaded steel bars is phi 20mm multiplied by 2000mm, proper frame beam frames are selected according to the mountain slope environment, the specification of the frame beam frames is 300mm multiplied by 400mm in length, the frame beam frames are embedded into the rocks, the depth of the frame beam frames embedded into the rocks is 150mm, then concrete is sprayed in the frame beam frames, the frame beam frames are prevented from rusting and corroding, and the protection capability of the frame beam frames is obviously enhanced. Specifically, the strength of the sprayed concrete is C20, and the spraying thickness is 50 mm. The embodiment also fills the binder at the bottom in the frame girder, and then lays the nutrient soil on the binder, can provide the growing environment of miscellaneous tree vegetation, helps to afforest the hillside, and selects the broad-leaved grass and/or the alfalfa seeds to spray-sow on the nutrient soil.
The double-pipe shed tunnel entering construction step comprises: the method comprises the following steps that a double-layer pipe shed is adopted in a tunnel, the double-layer pipe shed comprises an inner pipe shed 3 and an outer pipe shed 4, the inner pipe shed 3 and the outer pipe shed 4 are both arc-shaped, the radial distance (namely H in figure 2) between the inner pipe shed 3 and the outer pipe shed 4 is 40-70 mm, a plurality of circular pipes 5 are uniformly distributed in the circumferential direction of the inner pipe shed 3 and the outer pipe shed 4 respectively, the specification of each circular pipe 5 is phi 108mm, the circumferential distance (namely B in figure 2) between the circular pipes 5 of the inner pipe shed 3 and the circular pipes 5 of the outer pipe shed 4 is 1000mm, and the axial distance between reinforcing steel bars; the length of the round pipe 5 is selected according to the length of the tunnel, the round pipe 5 of the inner pipe shed 3 and the round pipe 5 of the outer pipe shed 4 are respectively bound and connected through the steel bars 6, the specification of the steel bars 6 is phi 20mm, the steel bar net piece 7 is laid on the steel bars 6 of the outer pipe shed 4, and finally the steel bar net piece 7, the steel bars 6 of the outer pipe shed 4 and the round pipes 5 are fixed through spraying concrete. In the embodiment, a double-pipe shed is utilized to enter the tunnel, the double-pipe shed is respectively bound and connected with the circular pipes 5 by utilizing the steel bars 6 to form the arc-shaped arched shed, so that the supporting and protecting strength in the tunnel is obviously enhanced, and the steel bar meshes 7 are laid on the steel bars 6 of the outer pipe shed 4 to obviously improve the tunnel entering safety.
In this embodiment, it is preferable that the length of the inner pipe shed 3 extending to the outside of the surrounding rock when the inner pipe shed is installed is L2, L2 is 16000mm, the length of the outer pipe shed 4 extending to the outside of the surrounding rock when the outer pipe shed is installed is L1, L1 is 12000mm, the steel mesh 7 is also laid on the extending part of the steel bar 6 of the outer pipe shed 4 and the extending part of the steel bar 6 of the inner pipe shed 3, which is longer than the outer pipe shed 4, and the steel mesh is fixed by spraying concrete, so as to perform safety protection on the tunnel entrance and exit.
The embodiment can also comprise the following passive protection construction steps:
① A passive protective net is respectively constructed at a distance from the down part of a mountain top village residential building and a distance from the top part of a tunnel open cut tunnel, concretely, in the embodiment, 10000mm below the mountain top village residential building and 20000mm above the top of the tunnel, a passive protective net is constructed respectively, the height of the passive protective net is 6000mm and the length of the passive protective net is 50000-60000 mm according to living conditions of the mountain top village residential building and growth conditions of miscellaneous tree vegetation, so that sundries thrown by villagers are prevented from rolling down a hill, or stones rolling down the hill can be blocked in the passive protective net and cannot roll to a tunnel line, so that the safety of the construction process is improved, ② concrete is cast at the outermost end of the inlet end of the open cut tunnel to construct an arc-up eave, so that falling stones on the tunnel top are prevented from directly falling onto the tunnel line, and the falling stones on two sides of the open cut tunnel are prevented from rolling down to two sides of the tunnel and cannot roll into the tunnel line.
The construction method also comprises an ascending inclined shaft construction step and an ascending inclined shaft construction step, wherein a planned communication end is arranged on the tunnel main tunnel, an ascending inclined shaft is communicated with the planned communication end on the tunnel main tunnel, the ascending inclined shaft starts construction from the position, which is about 580000mm away from the planned communication end, of the right lower side of the tunnel, when the ascending inclined shaft is constructed to be 10000mm away from the planned communication end, the ascending inclined shaft construction is suspended, safety protection is well achieved, and the ascending inclined shaft is communicated with the main tunnel through the tunnel main tunnel construction. The construction working face of the tunnel can be increased by the aid of the uphill inclined shaft, the processing construction progress is obvious, and the construction period is shortened.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (9)
1. A construction method for safely entering a tunnel with rolling stones and a high and steep slope is characterized by comprising the following steps: the method comprises the steps of steep slope active protective net construction and double-pipe shed tunnel entering construction:
construction of a steep slope active protective net: dividing the steep slope into a plurality of platforms according to the slope of the mountain and the growth condition of miscellaneous tree vegetation, and applying an active protective net to each platform from top to bottom for protection;
the double-pipe shed tunnel entering construction step comprises: adopt double-deck pipe canopy to strut in the tunnel, double-deck pipe canopy includes interior pipe canopy and outer tube canopy, the outer pipe canopy cover is established in the interior pipe canopy outside, interior pipe canopy and outer tube canopy are arc, interior pipe canopy and outer tube canopy all include a plurality of pipe and a plurality of reinforcing bar, the circumferencial direction evenly distributed on a plurality of pipe edge tunnel top, a plurality of pipe utilizes reinforcement to connect, lay the reinforcing bar net piece on the reinforcing bar of outer pipe canopy, it is fixed with the reinforcing bar of outer pipe canopy and the pipe of outer pipe canopy to carry out the spraying concrete at last.
2. The construction method for safely entering the hole of the rolling stone high and steep slope tunnel according to claim 1, is characterized in that: in the process of constructing the active protective net, firstly, the pumice live rocks on each platform are cleaned, meanwhile, the trees on the platforms are protected from being damaged, then, the active protective net is constructed, and the length and the height of the active protective net are set by integrating the width of the platforms and the open cut tunnel.
3. The construction method for safely entering the hole of the rolling stone high and steep slope tunnel according to claim 1, is characterized in that: the active protective net comprises a plurality of protective net pieces, the specification of the protective net pieces is 4500mm multiplied by 4500mm, and a plurality of 200mm multiplied by 200mm grids are uniformly distributed on the protective net pieces.
4. The construction method for safely entering the hole of the rolling stone high and steep slope tunnel according to claim 1, is characterized in that: after the construction of the active protective net is completed, steel stranded wires are additionally arranged on the active protective net in places with huge dangerous stones, and long anchor cables are arranged to fixedly connect the active protective net with the mountain body of the upward slope.
5. The construction method for safely entering the hole of the rolling stone high and steep slope tunnel according to claim 1, is characterized in that: in the construction step of the abrupt slope active protection net, anchor rods and frame beam frames are constructed at the positions where slope brushing is performed or where miscellaneous tree vegetation grows rarely and rocks are exposed more, the frame beam frames are fixed by the anchor rods, the anchor rods adopt threaded steel bars, the frame beam frames with proper sizes are selected according to the slope brushing area or the rock exposed area, the frame beam frames are embedded into the rocks to a certain depth, and then concrete is sprayed in the frame beam frames to fix the frame beam frames.
6. The construction method for safely entering the hole of the rolling stone high and steep slope tunnel according to claim 5, is characterized in that: and filling a binder at the bottom in the frame girder, paving nutrient soil on the binder, and selecting broad-leaf grass and/or alfalfa seeds to spray and sow on the nutrient soil.
7. The construction method for safely entering the hole of the rolling stone high and steep slope tunnel according to claim 1, is characterized in that: the length that stretches out the tunnel entrance during outer pipe shed installation is L1, and the length that stretches out the tunnel entrance during inner pipe shed installation is L2, and L2 is greater than L1, and the steel bar net piece also is laid to the extension of outer pipe shed steel bar and the extension that inner pipe shed steel bar is longer than outer pipe shed to spraying concrete makes steel bar net piece and extension's outer pipe shed fixed, and spraying concrete makes steel bar net piece and inner pipe shed be good at outer pipe shed's extension fixed.
8. The construction method for safely entering the hole of the rolling stone high and steep slope tunnel according to claim 1, is characterized in that: further comprises the following passive protection construction steps:
① a passive protective net is respectively constructed at a distance from the mountain top villager house downwards and a distance from the top of the tunnel open cut tunnel upwards;
② at the outmost end of the open cut tunnel entrance end, concrete is poured to form arc upwarp eaves, so that the falling rocks at the tunnel top roll down to the two sides of the tunnel main tunnel from the two sides of the open cut tunnel and cannot roll to the tunnel line.
9. The construction method for safely entering the hole of the rolling stone high and steep slope tunnel according to claim 1, is characterized in that: the construction method further comprises an ascending inclined shaft construction step, wherein a planned communication end is arranged on the tunnel main hole, an ascending inclined shaft is communicated with the planned communication end on the tunnel main hole, the ascending inclined shaft starts construction at a distance from the planned communication end from the right lower side of the tunnel, when the ascending inclined shaft is constructed to a certain distance from the planned communication end, the construction of the ascending inclined shaft is suspended, safety protection is well achieved, and the ascending inclined shaft is communicated with the main hole through the tunnel main hole construction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910201648.8A CN109915170B (en) | 2019-03-18 | 2019-03-18 | Construction method for safe entry of rock-rolling high-steep-slope tunnel |
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| CN201910201648.8A CN109915170B (en) | 2019-03-18 | 2019-03-18 | Construction method for safe entry of rock-rolling high-steep-slope tunnel |
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| CN109915170A CN109915170A (en) | 2019-06-21 |
| CN109915170B true CN109915170B (en) | 2020-06-09 |
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| CN201704636U (en) * | 2010-05-25 | 2011-01-12 | 中铁十八局集团第三工程有限公司 | Novel active protecting net |
| CN102182465A (en) * | 2011-04-01 | 2011-09-14 | 长安大学 | Tunnel-entering construction method for tunnel |
| CN104818991A (en) * | 2015-03-30 | 2015-08-05 | 中铁二十四局集团福建铁路建设有限公司 | Construction method of residual slope wash tunnel with shallow cover and unsymmetrical pressure |
| CN206289641U (en) * | 2016-12-24 | 2017-06-30 | 中铁十八局集团有限公司 | A kind of tunnel face talus slide protection device |
| CN107387126A (en) * | 2017-09-08 | 2017-11-24 | 中交公局第三工程有限公司 | Colluvial clay tunneltron booth structure and colluvial clay method for tunnel construction |
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2019
- 2019-03-18 CN CN201910201648.8A patent/CN109915170B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU750092A1 (en) * | 1978-06-20 | 1980-07-23 | Кузбасский Политехнический Институт | Shield for working thick sloping beds |
| CN201704636U (en) * | 2010-05-25 | 2011-01-12 | 中铁十八局集团第三工程有限公司 | Novel active protecting net |
| CN102182465A (en) * | 2011-04-01 | 2011-09-14 | 长安大学 | Tunnel-entering construction method for tunnel |
| CN104818991A (en) * | 2015-03-30 | 2015-08-05 | 中铁二十四局集团福建铁路建设有限公司 | Construction method of residual slope wash tunnel with shallow cover and unsymmetrical pressure |
| CN206289641U (en) * | 2016-12-24 | 2017-06-30 | 中铁十八局集团有限公司 | A kind of tunnel face talus slide protection device |
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