CN202181908U - Expanding soft rock roadway waterproof supporting combined structure - Google Patents
Expanding soft rock roadway waterproof supporting combined structure Download PDFInfo
- Publication number
- CN202181908U CN202181908U CN2011202923747U CN201120292374U CN202181908U CN 202181908 U CN202181908 U CN 202181908U CN 2011202923747 U CN2011202923747 U CN 2011202923747U CN 201120292374 U CN201120292374 U CN 201120292374U CN 202181908 U CN202181908 U CN 202181908U
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- China
- Prior art keywords
- roadway
- bottom plate
- soft rock
- waterproof supporting
- combined structure
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000011435 rock Substances 0.000 title claims abstract description 38
- 239000004568 cement Substances 0.000 claims abstract description 14
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 4
- 230000006378 damage Effects 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 239000004927 clay Substances 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 4
- 230000002787 reinforcement Effects 0.000 abstract description 4
- 239000003245 coal Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000002045 lasting effect Effects 0.000 abstract description 2
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000008235 industrial water Substances 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 101100495270 Caenorhabditis elegans cdc-26 gene Proteins 0.000 description 1
- 241001269238 Data Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000005570 vertical transmission Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000010148 water-pollination Effects 0.000 description 1
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- Lining And Supports For Tunnels (AREA)
Abstract
An expanding soft rock roadway waterproof supporting combined structure is suitable for waterproof support of an underground soft rock roadway of a coal mine. The expanding soft rock roadway waterproof supporting combined structure comprises a geosynthetic clay liner (GCL) and a cement concrete inverted bottom arch poured thereon, wherein two ends of the geosynthetic clay liner are exposed higher than a bottom plate, the geosynthetic clay liner is horizontally laid under the roadway bottom plate, and a bottom layer reinforcement mat and an upper layer reinforcement mat are spaced and arranged in the cement concrete inverted bottom arch, thus an increase of a damage scope to the roadway bottom plate rock stratum caused by water can be reduced, the integral bearing capability of the bottom plate can be effectively raised, occurrences of expanding type floor heaves and extruding broken type floor heaves can be prevented, and stability of the expanding soft rock roadway can be kept; at the same time, the combined structure is beneficial to stabilization of the bottom plate rock stratum, and ballasts laid on the bottom plate in a later period can be prevented from being contacted with the geosynthetic clay liner, thereby reducing damages to the geosynthetic clay liner. The expanding soft rock roadway waterproof supporting combined structure of the utility model has the advantages of simple structure, strong damage resistance, lasting waterproofness, high construction efficiency, short construction period, and low cost.
Description
Technical field
The utility model relates to a kind of soft-rock tunnel waterproof combining structure, especially a kind of expansion soft-rock tunnel waterproof supporting combining structure that is applicable to distension at the bottom of the coal down-hole, sump, central pump house etc.
Background technology
Because a large amount of exploitations of coal resources, mine laneway developing demand increases severely.Mine working is along with buried depth increases at present, and country rock physics and mechanical property are complicated, and support technology requires to increase day by day, and most mines face country rock of soft rock roadway control problem.End distension is a kind of main mode of country rock of soft rock roadway deformation and failure, and a large amount of field datas show that the floor lift in gallery amount can account for the top, tunnel, base plate moves more than 70% of nearly amount.The expansion soft rock refers to contain clay high-expansion mineral; The significantly low-intensity engineering rock mass of distortion promptly takes place under than low stress level (﹤ 25MPa) condition; This rocks hydrophily is stronger, the lithology weak fragmentation of suction back, broken bloated argillization, low, the poor stability of intensity.Runoff that soft rock and crevice water and industrial water use produce on base plate and gutter compile flowing water and contact; Constantly expansion and softening; With the intensity of major injury floor strata, make it under less deviator stress, will produce dilatation, in addition; The reduction of floor strata intensity can make its unstability, destruction more easily, causes end distension deflection and two to help the convergent deformation amount to increase.The soft rock dilatation makes floor strata intensity receive the deterioration of greater strength with expansion and softening the interaction, and volume increases, damage envelope and convergence of wall rock increase, and under this process ringing, roadway floor acutely distension rises.Therefore, no matter take which kind of measure control end distension, as long as floor strata is in Riddled Condition for a long time, this base plate all can have broken the expanding of tangible extruding to reach the imbibition phenomenon, and its maintenance effects is certain to receive bigger influence.
Getter author has carried out research and experiment to the mechanism and the prophylactico-therapeutic measures of floor lift in gallery both at home and abroad at present.Aspect theoretical, analyzed the major influence factors of mode that bottom deformation destroys and characteristic, end distension.Aspect end distension prevents and treats, various ways has appearred, comprise support reinforcement methods such as base plate anchor pole, floor grouting, closed support, joint-cutting, the hole of drilling, explosion, digging release lane, and various combined supporting method.These methods all are that distension is administered at the bottom of being primarily aimed at stress type.Anti-major measure of harnessing the river has through slip casting carries out shutoff crevice water; Drainage is carried out in the draining of drilling; Pour into that quicklime absorbs water and reinforcing etc., these measures can be played the effect of distension at the bottom of the control expansion soft rock under certain condition, in case but crevice water pours in and tunnelling in the industrial water that produces form runoff at base plate; Just can't effectively stop contacting of soft rock and water again, the distortion of control end distension.The problem of these existence all can cause tunnel gross distortion or damage, can't normally use, and influences the mining area and produces, even cause casualties, and reprocess in the tunnel also can cause the huge amounts of material waste.
Summary of the invention
The purpose of the utility model is the weak point that overcomes in the prior art; Provide a kind of simple in structure, easy construction, cost low, can effectively stop the base plate runoff water to contact with base plate, and the expansion soft-rock tunnel waterproof supporting combining structure that provides certain stress intensity to support.
For realizing above-mentioned purpose; The expansion soft-rock tunnel waterproof supporting combining structure of the utility model; Comprise that two help to expose and are higher than floor level and are layed in GCL and arch of the anti-end of above that cement concrete of pouring under the roadway floor, be interval with bottom layer of the reinforcing steel net and top mat in the arch of the anti-end of cement concrete.
The bottom of described GCL is furnished with the base plate spray concrete of handling smooth surface; Described GCL thickness is 6mm, and fabric width is 2m, 4m or three kinds of specifications of 6m, and length is 20m～60m; Described two to help to expose the height that is higher than horizonal base plate be 500mm; The ratio of rise to span of arch of the anti-end of described cement concrete is 1:10～1:4, and rise is 400mm～900mm, its end face level; Described bottom layer of the reinforcing steel net and top mat spacing distance are 100mm～300mm.
Beneficial effect:, lay GCL at the base plate place of backbreaking, effectively enclosing tunnel owing to adopted technique scheme; Stop the base plate runoff water to contact with base plate, arch of the anti-end of cement concrete has changed the stress state of base plate vicinity rock stratum to a certain extent, reduces acting on the deviator of stress on the floor strata; The rock stratum is produced the dilatation distortion under big deviator stress effect certain control is arranged; Retrain the effect of soft rock expansion, reduce the degree of injury of base plate expansion soft rock, help the stable of floor strata; Prevent that simultaneously base plate later stage laying ballast aggregate from contacting with GCL, reduces the damage of GCL.This combining structure is simple, effectively solves sealing, isolation, antiseep problem, and is effective, anti-destructive is strong, water resistance is lasting, efficiency of construction is high, the duration is short, low (20～30 yuan/m of the market price of cost
2), unite deformation and the destruction that the expansion soft-rock tunnel can be effectively controlled in use with other supporting and protection structure, have practicality widely.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Among the figure: 1-GCL, arch of the anti-end of 2-cement concrete, 3-bottom layer of the reinforcing steel net, 4-top mat, 5-base plate spray concrete.
The specific embodiment
To combine accompanying drawing that the embodiment of the utility model is done further description below:
The expansion soft-rock tunnel waterproof supporting combining structure of the utility model mainly is made up of arch of the anti-end of GCL 1 and cement concrete 2.GCL 1 two ends are exposed and are layed under the roadway floor; The bottom of GCL 1 is furnished with the base plate spray concrete 5 of handling smooth surface; Be that GCL 1 is laid on the base plate smooth surface after the base plate spray concrete 5 of backbreaking is handled; The overlapping overlap joint of horizontal level is 100mm, exposes two ends and exceeds the horizontal 500mm of back-plane design.The top pouring of GCL 1 has arch of the anti-end of cement concrete 2, and it is 1:10～1:4 that 2 ratios of rise to span are encircleed at the anti-end of cement concrete, and rise is 400mm～900mm, the end face level; Be interval with bottom layer of the reinforcing steel net 3 and top mat 4 in the arch of the anti-end of cement concrete 2; Two layers of mesh spacing 100mm～300mm, steel mesh reinforcement is formed by Φ 6.5mm dish round bar weldering system, and the net width of cloth is 2m * 1m; Grid is 100mm * 100mm, and strength grade of concrete is C30～C50.The thickness of said GCL 1 is 6mm, and fabric width is 2m, 4m or three kinds of specifications of 6m, and length is 20m～60m; Total length is laid along the tunnel, and the plane connects the mode that adopts overlapping overlap joint, lap length 100mm; Facade surpasses base plate height 500mm, fixes with nail and packing ring.
The technical indicator of the GCL 1 that adopts satisfies: bentonite inflated coefficient (ml/2g)>=24; Mass area ratio (g/m
2)>=4500; Longitudinal fracture intensity (KN/m)>=10; Cross-breaking strength (KN/m)>=10; Longitudinal fracture elongation rate (%)≤10; Transverse breakage elongation rate (%)≤6; Vertical transmission coefficient (cm/s)≤5 * 10
-9Peel strength (N)>=65; Hydrostatic pressure resistant test (0.5Mp) 24 hours leakproofs.
Claims (6)
1. expansion soft-rock tunnel waterproof supporting combining structure; It is characterized in that: it comprises that two help to expose and are higher than floor level and are layed in GCL (1) and the anti-end arch of above that cement concrete of pouring (2) under the roadway floor, is interval with bottom layer of the reinforcing steel net (3) and top mat (4) in the anti-end arch of cement concrete (2).
2. expansion soft-rock tunnel waterproof supporting combining structure according to claim 1 is characterized in that: the bottom of described GCL (1) is furnished with the base plate spray concrete (5) of handling smooth surface.
3. expansion soft-rock tunnel waterproof supporting combining structure according to claim 1, it is characterized in that: described GCL (1) thickness is 6mm, and fabric width is 2m, 4m or three kinds of specifications of 6m, and length is 20m～60m.
4. expansion soft-rock tunnel waterproof supporting combining structure according to claim 1 is characterized in that: described two to help to expose the height that is higher than horizonal base plate be 500mm.
5. expansion soft-rock tunnel waterproof supporting combining structure according to claim 1 is characterized in that: the ratio of rise to span of the anti-end arch of described cement concrete (2) is 1:10～1:4, and rise is 400mm～900mm, its end face level.
6. expansion soft-rock tunnel waterproof supporting combining structure according to claim 1 is characterized in that: described bottom layer of the reinforcing steel net (3) and top mat (4) spacing distance are 100mm～300mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202923747U CN202181908U (en) | 2011-08-12 | 2011-08-12 | Expanding soft rock roadway waterproof supporting combined structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202923747U CN202181908U (en) | 2011-08-12 | 2011-08-12 | Expanding soft rock roadway waterproof supporting combined structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202181908U true CN202181908U (en) | 2012-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202923747U Expired - Fee Related CN202181908U (en) | 2011-08-12 | 2011-08-12 | Expanding soft rock roadway waterproof supporting combined structure |
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| CN (1) | CN202181908U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105464668A (en) * | 2016-01-18 | 2016-04-06 | 山东科技大学 | Technology for controlling floor heave of soft rock roadway |
| CN106640125A (en) * | 2015-10-30 | 2017-05-10 | 山东科技大学 | Positive and negative protection combined construction technology of modularized prevention of base plate deformation |
| CN110030014A (en) * | 2019-03-18 | 2019-07-19 | 辽宁工程技术大学 | A kind of Soft Rock Roadway Floor Heave allows pressure camber shell administering method |
| CN110835903A (en) * | 2019-11-27 | 2020-02-25 | 中国水利水电第一工程局有限公司 | Bottom arch concrete protection device and method for water delivery tunnel in shape of horseshoe |
-
2011
- 2011-08-12 CN CN2011202923747U patent/CN202181908U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640125A (en) * | 2015-10-30 | 2017-05-10 | 山东科技大学 | Positive and negative protection combined construction technology of modularized prevention of base plate deformation |
| CN105464668A (en) * | 2016-01-18 | 2016-04-06 | 山东科技大学 | Technology for controlling floor heave of soft rock roadway |
| CN110030014A (en) * | 2019-03-18 | 2019-07-19 | 辽宁工程技术大学 | A kind of Soft Rock Roadway Floor Heave allows pressure camber shell administering method |
| CN110835903A (en) * | 2019-11-27 | 2020-02-25 | 中国水利水电第一工程局有限公司 | Bottom arch concrete protection device and method for water delivery tunnel in shape of horseshoe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120404 Termination date: 20130812 |