CN112761674A - Anti-bottom-heaving structure of soft rock roadway and construction method thereof - Google Patents
Anti-bottom-heaving structure of soft rock roadway and construction method thereof Download PDFInfo
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- CN112761674A CN112761674A CN202110032794.XA CN202110032794A CN112761674A CN 112761674 A CN112761674 A CN 112761674A CN 202110032794 A CN202110032794 A CN 202110032794A CN 112761674 A CN112761674 A CN 112761674A
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- 239000011435 rock Substances 0.000 title claims abstract description 63
- 238000010276 construction Methods 0.000 title claims abstract description 29
- 239000004567 concrete Substances 0.000 claims abstract description 47
- 239000011464 hollow brick Substances 0.000 claims abstract description 40
- 238000009412 basement excavation Methods 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 239000004570 mortar (masonry) Substances 0.000 claims description 8
- 238000005422 blasting Methods 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 239000011449 brick Substances 0.000 claims description 4
- 235000019738 Limestone Nutrition 0.000 claims description 3
- 239000011083 cement mortar Substances 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- 239000006028 limestone Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000003823 mortar mixing Methods 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 2
- 230000002401 inhibitory effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
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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
- 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
- E21D11/06—Lining with building materials with bricks
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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
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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
- E21D9/006—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a soft rock roadway anti-heaving structure and a construction method thereof, wherein the soft rock roadway anti-heaving structure comprises the following steps: (1) determining the height of an inverted arch to be excavated according to the section size of the soft rock roadway and the rock stratum property of the roadway floor; (2) the inverted arch construction adopts a mode of matching an air pick and a hand pick, and simultaneously matches a method of putting a small gun, and excavation is carried out in a segmented manner from outside to inside; (3) drilling a plurality of rows of grouting anchor rods and a plurality of rows of anchor cables on a soft rock roadway bottom plate along the length direction of the roadway, and laying a steel wire mesh on the top of the grouting anchor rods; (4) pouring an inverted arch cushion layer: firstly, pouring a first concrete cushion layer, then paving a hollow brick cushion layer above the first concrete cushion layer, and finally pouring a second concrete cushion layer above the hollow brick cushion layer to enable the second concrete cushion layer to be flush with the excavation plane of the original bottom plate; (5) the invention adopts the hollow brick as the tunnel inverted arch cushion layer, has convenient construction and low price, and the unique structural characteristic plays an important role in inhibiting the tunnel bottom heave.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a soft rock roadway anti-heaving structure and a construction method thereof.
Background
At present, after a soft rock roadway is excavated, a roadway top bottom plate and two sides can deform due to uneven pressure, and the bottom heave treatment difficulty is the greatest. The traditional method for treating the bottom heave mainly comprises the following steps: the concrete inverted arch is matched with a grouting anchor rod and an anchor cable for supporting, or a metal bottom beam is added for supporting on the basis. The traditional mode of adding the steel beam belongs to passive support, supports by force completely depending on the characteristics of the steel beam, has great defects, and is high in cost and troublesome in construction. Therefore, it is urgently needed to develop a soft rock roadway anti-heaving structure and a construction method thereof to solve the technical problems.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a soft rock roadway anti-bottom heave structure and a construction method thereof.
In order to achieve the purpose, the construction method of the soft rock roadway anti-heaving structure comprises the following steps:
(1) determining the height of an inverted arch to be excavated according to the section size of the soft rock roadway and the rock stratum property of the roadway floor;
(2) the inverted arch construction adopts a mode of matching an air pick and a hand pick, and simultaneously matches a method of putting a small gun, and excavation is carried out in a segmented manner from outside to inside;
(3) arranging a plurality of rows of grouting anchor rods and a plurality of rows of anchor cables on a soft rock roadway bottom plate along the length direction of the roadway, wherein the number of the anchor rods of each row of grouting anchor rods and the number of the anchor cables of each row of anchor cables are four, the grouting anchor rods and the anchor cables are respectively arranged at trisection positions of an inverted bottom arch, and steel wire meshes are laid at the tops of the grouting anchor rods and the anchor cables;
(4) pouring an inverted arch cushion layer: firstly, pouring a first concrete cushion layer, then paving a hollow brick cushion layer above the first concrete cushion layer, and finally pouring a second concrete cushion layer above the hollow brick cushion layer to enable the second concrete cushion layer to be flush with the excavation plane of the original bottom plate;
(5) and determining whether the pressure relief groove is formed or not according to the height of the bottom drum at the later stage of use.
Preferably, in the step (1), the determination method of the inverted arch height is as follows: the common soft rock roadway section size is 5m × 4m or 4m × 3m in width × height, and the height of the corresponding excavated inverted arch is 1.2m or 1.0 m; if the roadway bottom plate rock stratum is a mud rock or limestone soft rock, the excavation depth of the inverted arch is 1.2m, if the roadway bottom plate rock stratum is a sandstone rock stratum with better properties, the excavation depth of the inverted arch is 1.0m, and the deepest excavation condition is judged according to the excavation depth of the inverted arch and the sandstone rock stratum.
Preferably, in the step (2), construction is carried out by adopting a method of putting a vibration gun, the depth of each blast hole is 0.6-1.0m, the charge amount of each blast hole is not more than 100g during blasting, the coal is densely drilled and less charged, gangue is timely discharged after blasting, the inverted arch is excavated into an arc shape by matching with an air pick and a manuscript, over-excavation and less excavation are strictly forbidden, and the quality of the inverted arch is ensured.
Preferably, in the step (3), firstly, a plurality of rows of anchor cables are arranged, each row of anchor cables comprises four anchor cables with the length of 5.2m and the diameter of 22mm, the anchor cables are respectively positioned at trisection positions of the reverse bottom arch, the inclination angles of the two middle anchor cables are consistent with the connecting line of the top point of the roadway and the anchor eye, the inclination angles of the two bottom angle anchor cables are 45 degrees, the row spacing of the anchor cables is 0.6m, then, a row of grouting anchor rods are arranged between the 2n-1 row of anchor cables and the 2n row of anchor cables, wherein n is a positive integer, each row of grouting anchor rods comprises four grouting anchor rods with the length of 3.8m and the diameter of 22mm, the grouting anchor rods are respectively positioned at trisection positions of the reverse bottom arch, the inclination angles of the grouting anchor rods are consistent with the anchor cables, the row spacing of the grouting anchor rods is 1.2.
Preferably, in the step (4), the concrete cushion layer I and the concrete cushion layer II both adopt fine sand cement mortar, the sand grain diameter is not more than 2.5mm, and the mixing ratio of the mortar is as follows: the sand-cement ratio is 0.5-1, the water-cement ratio is 0.38-0.45, and the mortar is uniformly stirred and used along with stirring.
Preferably, in the step (4), after the steel wire mesh is laid, the first concrete cushion layer is poured firstly, if the height of the designed excavation inverted bottom arch is 1.2m, the thickness of the first concrete cushion layer poured firstly is 300mm, the thickness of the hollow brick cushion layer laid in the middle is 300mm, and the thickness of the second concrete cushion layer poured finally is 600 mm; if the height of the designed excavation inverted bottom arch is 1.0m, the thickness of a first concrete cushion layer poured firstly is 250mm, the thickness of a hollow brick cushion layer paved in the middle is 250mm, the thickness of a second concrete cushion layer poured finally is 500mm, the concrete cushion layer is tamped by a vibrator, and the hollow brick cushion layer is paved after the strength of the first concrete cushion layer reaches 80%.
Preferably, in the step (4), the hollow bricks adopted by the hollow brick cushion layer are clay hollow bricks, the specific sizes of the hollow bricks are selected according to actual conditions, the cavities are in the horizontal direction along the wall when the hollow bricks are laid, and the vertical mortar joints of the upper and lower skins are staggered from each other for 1/2 brick lengths.
Preferably, in the step (5), in the later use stage, when the height of the roadway floor heave exceeds 30cm, a pressure relief groove is formed, and the pressure relief groove is located in the center of the roadway floor, is 20cm wide and is 1.5m deep.
The invention also provides a soft rock roadway anti-heaving structure formed by the construction method of the soft rock roadway anti-heaving structure.
The soft rock roadway anti-heaving structure and the construction method thereof have the following beneficial effects.
The invention adopts a combined supporting mode, and is mainly characterized in that a hollow brick cushion layer is laid, the hollow brick has certain strength, can meet the requirement of an inverted bottom arch cushion layer, and simultaneously has a large number of gaps, so that space and height can be provided for the bottom plate of the roadway to bulge so as to release partial stress, thereby achieving the effect of controlling the bottom bulge of the soft rock roadway.
Drawings
FIG. 1 is a schematic structural view of a soft rock roadway anti-heaving structure provided by the invention;
FIG. 2 is a plan view of arrangement of anchor cables and grouting anchor rods of the soft rock roadway anti-heaving structure provided by the invention;
fig. 3 is a schematic view of a hollow brick cushion layer structure of a soft rock roadway anti-heaving structure provided by the invention.
In the figure:
1. anchor rope 2, slip casting stock 3, concrete cushion 4, air brick bed course 5, concrete cushion 6, pressure relief groove 7, wire net.
Detailed Description
The present invention will be further described with reference to the following specific embodiments and accompanying drawings to assist in understanding the contents of the invention.
As shown in fig. 1, the invention provides a schematic structural diagram of a soft rock roadway anti-heaving structure. The construction method comprises the following steps:
(1) and determining the height of the inverted arch to be excavated according to the section size of the soft rock roadway and the rock stratum property of the roadway floor. The method for determining the height of the inverted arch comprises the following steps: the common soft rock roadway section size is 5m × 4m or 4m × 3m in width × height, and the height of the corresponding excavated inverted arch is 1.2m or 1.0 m; if the roadway bottom plate rock stratum is a mud rock or limestone soft rock, the excavation depth of the inverted arch is 1.2m, if the roadway bottom plate rock stratum is a sandstone rock stratum with better properties, the excavation depth of the inverted arch is 1.0m, and the deepest excavation condition is judged according to the excavation depth of the inverted arch and the sandstone rock stratum.
(2) The inverted arch construction adopts a mode of matching an air pick and a hand pick, and simultaneously matches a method of putting a small gun, and the excavation is carried out in a segmented mode from outside to inside. Preferably, the construction is carried out by adopting a method of putting a vibration gun, the depth of each blast hole is 0.6-1.0m, the charge amount of each blast hole is not more than 100g during blasting, dense drilling and less charge are carried out, gangue is timely discharged after blasting, the inverted arch is excavated into an arc shape by matching with an air pick and a manuscript, over-excavation and less excavation are strictly forbidden, and the quality of the inverted arch is ensured.
(3) A plurality of rows of grouting anchor rods 2 and a plurality of rows of anchor cables 1 are arranged on a soft rock roadway bottom plate along the length direction of the roadway, the number of the anchor rods of each row of grouting anchor rods 2 and the number of the anchor cables of each row of anchor cables 1 are four, the grouting anchor rods and the anchor cables are respectively arranged at trisection positions of an inverted bottom arch, and steel wire meshes 7 are laid at the tops of the grouting anchor rods 2 and the anchor cables 1. The specific operation method comprises the following steps: firstly, a plurality of rows of anchor cables 1 are arranged, each row of anchor cables 1 comprises four anchor cables 1 with the length of 5.2m and the diameter of 22mm, the anchor cables 1 are respectively positioned at trisection positions of an inverted bottom arch, the inclination angles of the two middle anchor cables 1 are consistent with the connecting line of a roadway vertex and an anchor eye, the inclination angles of the two bottom angle anchor cables 1 are 45 degrees, the row spacing of the anchor cables 1 is 0.6m, then a row of grouting anchor rods 2 are arranged between the 2n-1 row of anchor cables 1 and the 2n row of anchor cables 1, wherein n is a positive integer, each row of grouting anchor rods 2 comprises four grouting anchor rods 2 with the length of 3.8m and the diameter of 22mm, the grouting anchor rods 2 are respectively positioned at trisection positions of the inverted bottom arch, the inclination angles of the grouting anchor rods are consistent with the anchor cables 1, the row spacing of the grouting anchor rods 2 is 1.2. As shown in fig. 2, the invention provides a top view of arrangement of anchor cables and grouting anchor rods of the soft rock roadway anti-heaving structure.
(4) Pouring an inverted arch cushion layer: firstly pouring a first concrete cushion layer 3, then paving a hollow brick cushion layer 4 above the first concrete cushion layer 3, and finally pouring a second concrete cushion layer 5 above the hollow brick cushion layer 4 to enable the second concrete cushion layer to be flush with the original bottom plate excavation plane. The specific operation method comprises the following steps: after the steel wire mesh 7 is laid, firstly, a first concrete cushion layer 3 is poured, if the height of an excavation inverted arch is designed to be 1.2m, the thickness of the first concrete cushion layer 3 which is poured firstly is 300mm, the thickness of a hollow brick cushion layer 4 which is laid in the middle is 300mm, and the thickness of a second concrete cushion layer 5 which is poured finally is 600 mm; if the height of the designed excavation inverted bottom arch is 1.0m, the thickness of a first concrete cushion layer 3 which is poured firstly is 250mm, the thickness of a hollow brick cushion layer 4 which is paved in the middle is 250mm, the thickness of a second concrete cushion layer 5 which is poured finally is 500mm, the concrete cushion layer is tamped by a vibrator, and the hollow brick cushion layer 4 is paved after the strength of the first concrete cushion layer 3 reaches 80%. The hollow brick that hollow brick bed course 4 adopted is clay hollow brick, and the concrete size of hollow brick is selected according to actual conditions, and the cavity is the horizontal direction along the wall when hollow brick is laid, and the 1/2 bricks that stagger each other are long for the perpendicular mortar joint of upper and lower skin. As shown in fig. 3, the invention provides a schematic view of a cushion layer structure of a hollow brick of a soft rock roadway anti-heaving structure. The hollow brick is used as the tunnel inverted arch cushion layer, the construction is convenient, the price is low, and the unique structural characteristic plays an important role in inhibiting the tunnel bottom heave. The concrete cushion layer I3 and the concrete cushion layer II 5 both adopt fine sand cement mortar, the sand grain diameter is not more than 2.5mm, and the mortar mix proportion is as follows: the sand-cement ratio is 0.5-1, the water-cement ratio is 0.38-0.45, and the mortar is uniformly stirred and used along with stirring.
(5) And determining whether the pressure relief groove 6 is formed or not according to the height of the bottom drum at the later stage of use. And in the later stage of use, when the height of the roadway floor heave exceeds 30cm, a pressure relief groove 6 is formed, and the pressure relief groove 6 is positioned in the center of the roadway floor, is 20cm wide and 1.5m deep.
The invention adopts a combined supporting mode, and is mainly characterized in that the hollow brick cushion layer 4 is laid, the hollow brick has certain strength, can meet the requirement of the inverted bottom arch cushion layer, and simultaneously has a large number of gaps, and can provide space and height for the bottom plate of the roadway to bulge so as to release partial stress, thereby achieving the effect of controlling the bottom bulge of the soft rock roadway.
The inventive concept is explained in detail herein using specific examples, which are given only to aid in understanding the core concepts of the invention. It should be understood that any obvious modifications, equivalents and other improvements made by those skilled in the art without departing from the spirit of the present invention are included in the scope of the present invention.
Claims (9)
1. A construction method of a soft rock roadway anti-pucking structure is characterized by comprising the following steps:
(1) determining the height of an inverted arch to be excavated according to the section size of the soft rock roadway and the rock stratum property of the roadway floor;
(2) the inverted arch construction adopts a mode of matching an air pick and a hand pick, and simultaneously matches a method of putting a small gun, and excavation is carried out in a segmented manner from outside to inside;
(3) arranging a plurality of rows of grouting anchor rods and a plurality of rows of anchor cables on a soft rock roadway bottom plate along the length direction of the roadway, wherein the number of the anchor rods of each row of grouting anchor rods and the number of the anchor cables of each row of anchor cables are four, the grouting anchor rods and the anchor cables are respectively arranged at trisection positions of an inverted bottom arch, and steel wire meshes are laid at the tops of the grouting anchor rods and the anchor cables;
(4) pouring an inverted arch cushion layer: firstly, pouring a first concrete cushion layer, then paving a hollow brick cushion layer above the first concrete cushion layer, and finally pouring a second concrete cushion layer above the hollow brick cushion layer to enable the second concrete cushion layer to be flush with the excavation plane of the original bottom plate;
(5) and determining whether the pressure relief groove is formed or not according to the height of the bottom drum at the later stage of use.
2. The construction method of the soft rock roadway anti-heaving structure as claimed in claim 1, wherein in the step (1), the determination method of the height of the inverted arch is as follows: the common soft rock roadway section size is 5m × 4m or 4m × 3m in width × height, and the height of the corresponding excavated inverted arch is 1.2m or 1.0 m; if the roadway bottom plate rock stratum is a mud rock or limestone soft rock, the excavation depth of the inverted arch is 1.2m, if the roadway bottom plate rock stratum is a sandstone rock stratum with better properties, the excavation depth of the inverted arch is 1.0m, and the deepest excavation condition is judged according to the excavation depth of the inverted arch and the sandstone rock stratum.
3. The construction method of the soft rock roadway anti-bottom heave structure according to claim 2, characterized in that in the step (2), a method of placing a vibration gun is adopted for construction, the depth of a shot hole is 0.6-1.0m, the loading amount of each shot hole is not more than 100g during blasting, dense-shot and less-loaded charges are carried out, gangue is timely discharged after blasting, an anti-bottom arch is excavated into an arc shape by matching with an air pick and a manuscript, over-excavation and less-excavation are strictly forbidden, and the quality of the anti-bottom arch is ensured.
4. The construction method of the soft rock roadway anti-bottom heave structure according to claim 3, characterized in that in the step (3), firstly, a plurality of rows of anchor cables are arranged, each row of anchor cables comprises four anchor cables with the length of 5.2m and the diameter of 22mm, the anchor cables are respectively positioned at the trisection of the inverted bottom arch, the inclination angles of the two middle anchor cables are consistent with the connecting line of the top point of the roadway and the anchor eye, the inclination angles of the two bottom angle anchor cables are 45 degrees, the row spacing of the anchor cables is 0.6m, then, a row of grouting anchor rods are arranged between the 2n-1 row of anchor cables and the 2n row of anchor cables, wherein n is a positive integer, each row of grouting anchor rods comprises four grouting anchor rods with the length of 3.8m and the diameter of 22mm, the grouting anchor rods are respectively positioned at the trisection of the inverted bottom arch, the inclination angles of the grouting anchor rods are consistent with the anchor cables, the row spacing of the grouting anchor rods is 1.2 m.
5. The construction method of the soft rock roadway anti-heaving structure as claimed in claim 4, wherein in the step (4), the concrete cushion layer I and the concrete cushion layer II both adopt fine sand cement mortar, the sand grain diameter is not more than 2.5mm, and the mortar mixing ratio is as follows: the sand-cement ratio is 0.5-1, the water-cement ratio is 0.38-0.45, and the mortar is uniformly stirred and used along with stirring.
6. The construction method of the soft rock roadway anti-bottom heave structure according to claim 5, wherein in the step (4), after the steel wire mesh is laid, a first concrete cushion layer is firstly poured, if the height of the designed excavation inverted bottom arch is 1.2m, the thickness of the first concrete cushion layer which is firstly poured is 300mm, the thickness of the hollow brick cushion layer which is laid in the middle is 300mm, and the thickness of the second concrete cushion layer which is finally poured is 600 mm; if the height of the designed excavation inverted bottom arch is 1.0m, the thickness of a first concrete cushion layer poured firstly is 250mm, the thickness of a hollow brick cushion layer paved in the middle is 250mm, the thickness of a second concrete cushion layer poured finally is 500mm, the concrete cushion layer is tamped by a vibrator, and the hollow brick cushion layer is paved after the strength of the first concrete cushion layer reaches 80%.
7. The construction method of the soft rock roadway anti-pucking structure as claimed in claim 6, wherein in the step (4), the hollow bricks adopted by the hollow brick cushion layer are clay hollow bricks, the specific sizes of the hollow bricks are selected according to actual conditions, when the hollow bricks are laid, the cavities are in the horizontal direction along the wall, and the vertical mortar joints of the upper and lower skins are staggered from each other by 1/2 bricks in length.
8. The construction method of the soft rock roadway anti-heaving structure as claimed in claim 7, wherein in the step (5), when the roadway heaving height exceeds 30cm in the later period of use, a pressure relief groove is formed, and the pressure relief groove is located in the center of the roadway bottom plate, is 20cm wide and is 1.5m deep.
9. A soft rock roadway anti-heaving structure formed by the construction method of the soft rock roadway anti-heaving structure as claimed in any one of claims 1 to 8.
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| CN202110032794.XA CN112761674B (en) | 2021-01-11 | 2021-01-11 | Soft rock roadway bottom-bulging-preventing structure and construction method thereof |
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| CN202110032794.XA CN112761674B (en) | 2021-01-11 | 2021-01-11 | Soft rock roadway bottom-bulging-preventing structure and construction method thereof |
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Cited By (2)
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|---|---|---|---|---|
| CN113006817A (en) * | 2021-05-08 | 2021-06-22 | 上海应用技术大学 | Upper and bottom combined supporting structure capable of yielding and construction method thereof |
| CN113586086A (en) * | 2021-07-12 | 2021-11-02 | 山西工程技术学院 | Reinforcing method for semi-closed large-section roadway weak crushing bottom plate |
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| CN110924979A (en) * | 2019-12-05 | 2020-03-27 | 中国铁建大桥工程局集团有限公司 | Prefabricated assembled inverted arch for mountain tunnel and construction method of prefabricated assembled inverted arch |
| CN111502706A (en) * | 2020-03-26 | 2020-08-07 | 中铁十八局集团有限公司 | Tunnel inverted arch structure and method suitable for bottom heave deformation control |
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| CN113006817A (en) * | 2021-05-08 | 2021-06-22 | 上海应用技术大学 | Upper and bottom combined supporting structure capable of yielding and construction method thereof |
| CN113006817B (en) * | 2021-05-08 | 2023-06-20 | 上海应用技术大学 | Combined support structure capable of yielding and construction method thereof |
| CN113586086A (en) * | 2021-07-12 | 2021-11-02 | 山西工程技术学院 | Reinforcing method for semi-closed large-section roadway weak crushing bottom plate |
| CN113586086B (en) * | 2021-07-12 | 2024-02-20 | 山西工程技术学院 | Method for reinforcing weak broken bottom plate of semi-closed large-section roadway |
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