CN104775789A - Self-dissolving grouting reinforcing method for water-rich broken soft rock tunnel - Google Patents
Self-dissolving grouting reinforcing method for water-rich broken soft rock tunnel Download PDFInfo
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- CN104775789A CN104775789A CN201510206972.0A CN201510206972A CN104775789A CN 104775789 A CN104775789 A CN 104775789A CN 201510206972 A CN201510206972 A CN 201510206972A CN 104775789 A CN104775789 A CN 104775789A
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Abstract
The invention discloses a self-dissolving grouting reinforcing method for a water-rich broken soft rock tunnel. Cement mortar is subject to self dissolving by underground water in a crack of the water-rich broken soft rock to form slurry; for the water-rich broken soft rock tunnel, the further softening of the water-rich broken soft rock because of additional filling of water in the traditional grouting method can be avoided, and one part of existing crack water of the water-rich broken soft rock can be consumed by the self dissolving of cement mortar. The self-dissolving grouting reinforcing method is an effective grouting reinforcing method for the water-rich broken soft rock tunnel, and the obvious effect on guaranteeing the safety tunneling function of the water-rich broken soft rock tunnel is realized.
Description
Technical field
The invention belongs to deep laneway surrounding rock reinforcing technique field, more specifically relate to a kind of rich water broken soft rock tunnel from dissolving grouting strengthening method, be applicable to rich water broken soft rock its support reinforcement, be particularly useful for mud stone etc. and be rich in the surrounding rock consolidation supporting of hydrophilic class mineral and underground water shutoff etc., ensure that tunnel safety is stablized.
Background technology
Along with to the increase of demand for energy and continuing to increase of mining rate, superficial part resource reduces day by day, and domestic and international mine enters deep resource exploitation state all in succession.For deep rock mass, affect by tectonic movement in early stage on the one hand, easily form tectonic disruption district; On the other hand, after roadway excavation, stress state changes, and also can aggravate breaking of country rock further, thus forms country rock district smashed to pieces, the stable key determining tunnel safety in tunneling process often of this part country rock.Soft rock is surrounding rock type common in the deep tunnel of colliery, easily forms Fu Shui country rock district smashed to pieces under the effect of and water heavily stressed in deep, often becomes the key area of the whole tunnel safety driving of restriction.Grouting and reinforcing is common reinforcement means, traditional method needs water as the conveying medium of slurries, but the intervention of water can aggravate the softening of mud stone, contradiction between both makes traditional grouting method be difficult to produce a desired effect in soft rock is reinforced, and brings major safety problems and economic loss to colliery deep tunnel.Therefore, need a kind of new grouting method that can be applicable to rich water broken soft rock tunnel badly, ensure the safe and efficient driving of colliery deep tunnel.
Summary of the invention
In order to solve above-mentioned technical problem, the invention provides a kind of rich water broken soft rock tunnel from dissolving grouting strengthening method.
The technical solution adopted in the present invention is: a kind of rich water broken soft rock tunnel, from dissolving grouting strengthening method, is characterized in that, comprises the following steps:
Step 1: to rich water broken soft rock surface, tunnel shotcrete layer, form the relative closure region of certain area;
Step 2: by the some injection holes of square profile mode preboring and some drain holes in closed area, drain hole is positioned at foursquare four summits place, and injection hole is positioned at square center point place, the aperture of drain hole is closed with cork at once after creeping into end;
Step 3: take blast as power, is pressed into rich water broken soft rock region by the concrete grey of suspension by injection hole, and promotes dissolving and the flowing of concrete grey and Fu Shui broken soft rock crevice water by improving blast;
Step 4: open drain hole, makes the crevice water being mixed into concrete grey form flow channel in rich water broken soft rock, again closes drain hole when having cement grout to ooze out in drain hole;
Step 5: improve blast and concrete grey concentration, continues to inject concrete grey by injection hole, when aperture grouting pressure reaches design grouting pressure, completes grouting and reinforcing.
As preferably, concrete grey enters rich water broken soft rock with suspended state by injection hole by blast, the aquation of concrete grey and to dissolve be all rely on rich water broken soft rock internal crack water.
As preferably, the present invention promotes the inner water system self-balancing of rich water broken soft rock by the pressure differential controlled between injection hole and drain hole, thus realizes slurries diffusion.
Advantage of the present invention and effect are mainly reflected in following several respects:
1, be applicable to rich water broken soft rock roadway rock reinforce and underground water shutoff etc., be especially rich in the rich water broken soft rock conditions such as the mud stone of hydrophilic mineral, effect is especially obvious;
2, grouting and reinforcing process utilizes rich self crevice water of water broken soft rock, does not have extraneous water to get involved on the one hand, and concrete grey aquation can also consume part rich water broken soft rock crevice water on the other hand, is favourable to stability of the roadway;
3, realize slurries diffusion by the inner water system self-balancing of rich water broken soft rock, slip casting effect is better.
Accompanying drawing explanation
Fig. 1: be the floor map of the embodiment of the present invention;
Fig. 2: be the elevational schematic view of the embodiment of the present invention.
Wherein 1-injection hole; 2-drain hole; 3-layer of concrete; 4-rich water broken soft rock; 5-cork; 6-pressure meter.
Detailed description of the invention
Understand for the ease of those of ordinary skill in the art and implement the present invention, below in conjunction with drawings and Examples, the present invention is described in further detail, should be appreciated that exemplifying embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Ask for an interview Fig. 1 and Fig. 2, one provided by the invention rich water broken soft rock tunnel, from dissolving grouting strengthening method, comprises the following steps:
Step 1: to the surperficial shotcrete layer 3 of the rich water broken soft rock 4 in tunnel, thickness 100-150mm, spray regime is greater than intends reinforcing scope 3-5m, forms the relative closure region of certain area;
Step 2: by the some injection holes of square profile mode preboring 1 and some drain holes 2 in closed area, drain hole 2 is positioned at foursquare four summits place, injection hole 1 is positioned at square center point place, injection hole 1 aperture 100-150mm, drain hole 2 aperture 75-90mm, the degree of depth that pierces of injection hole 1 and drain hole 2 requires to carry out according to Site Design; The aperture of drain hole 2 is closed with cork 5 at once after creeping into end;
Step 3: be that (coal mine roadway can directly utilize the airduct preset in tunnel to provide blast to power with blast, other project needs to utilize air compressor to provide blast), the concrete grey of suspension is pressed into rich water broken soft rock region 4 by injection hole 1, and promotes dissolving and the flowing of concrete grey and Fu Shui broken soft rock 4 crevice water by improving blast;
Step 4: open drain hole 2, makes the crevice water being mixed into concrete grey form flow channel in rich water broken soft rock 4, again closes drain hole 2 when having cement grout to ooze out in drain hole 2;
Step 5: improve blast and concrete grey concentration, continues to inject concrete grey by injection hole 1, when aperture grouting pressure reaches design grouting pressure, completes grouting and reinforcing.
The concrete grey of the present embodiment enters rich water broken soft rock 4 with suspended state by injection hole 1 by blast, and the aquation of concrete grey and dissolving are all rely on rich water broken soft rock 4 internal crack water.
The present embodiment utilizes pressure meter 6, promotes the inner water system self-balancing of rich water broken soft rock 4 by the pressure differential controlled between injection hole 1 and drain hole 2, thus realizes slurries diffusion.
The present invention utilizes the underground water in rich water broken soft rock crack to carry out from dissolving to concrete grey, thus formation slurries, for rich water broken soft rock tunnel, both traditional grouting method can have been avoided additionally to add water softening further rich water broken soft rock, concrete grey also can consume the existing crevice water of part rich water broken soft rock from dissolving simultaneously, a kind of very effective grouting strengthening method being applicable to rich water broken soft rock tunnel, fairly obvious to such rich water broken soft rock tunnel safety driving effect of guarantee.
Should be understood that, the part that this manual does not elaborate all belongs to prior art.
Should be understood that; the above-mentioned description for preferred embodiment is comparatively detailed; therefore the restriction to scope of patent protection of the present invention can not be thought; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that the claims in the present invention protect; can also make and replacing or distortion, all fall within protection scope of the present invention, request protection domain of the present invention should be as the criterion with claims.
Claims (3)
1. rich water broken soft rock tunnel is from dissolving a grouting strengthening method, it is characterized in that, comprises the following steps:
Step 1: to rich water broken soft rock surface, tunnel shotcrete layer, form the relative closure region of certain area;
Step 2: by the some injection holes of square profile mode preboring and some drain holes in closed area, drain hole is positioned at foursquare four summits place, and injection hole is positioned at square center point place, the aperture of drain hole is closed with cork at once after creeping into end;
Step 3: take blast as power, is pressed into rich water broken soft rock region by the concrete grey of suspension by injection hole, and promotes dissolving and the flowing of concrete grey and Fu Shui broken soft rock crevice water by improving blast;
Step 4: open drain hole, makes the crevice water being mixed into concrete grey form flow channel in rich water broken soft rock, again closes drain hole when having cement grout to ooze out in drain hole;
Step 5: improve blast and concrete grey concentration, continues to inject concrete grey by injection hole, when aperture grouting pressure reaches design grouting pressure, completes grouting and reinforcing.
2. rich water broken soft rock tunnel according to claim 1 is from dissolving grouting strengthening method, it is characterized in that: concrete grey enters rich water broken soft rock with suspended state by injection hole by blast, the aquation of concrete grey and dissolving are all rely on rich water broken soft rock internal crack water.
3. rich water broken soft rock tunnel according to claim 1 and 2 is from dissolving grouting strengthening method, it is characterized in that: promote the inner water system self-balancing of rich water broken soft rock by the pressure differential controlled between injection hole and drain hole, thus realize slurries diffusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510206972.0A CN104775789B (en) | 2015-04-28 | 2015-04-28 | Grouting strengthening method is dissolved certainly in a kind of rich water broken soft rock tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510206972.0A CN104775789B (en) | 2015-04-28 | 2015-04-28 | Grouting strengthening method is dissolved certainly in a kind of rich water broken soft rock tunnel |
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| Publication Number | Publication Date |
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| CN104775789A true CN104775789A (en) | 2015-07-15 |
| CN104775789B CN104775789B (en) | 2017-03-08 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020057948A1 (en) * | 2000-08-10 | 2002-05-16 | Steinar Roald | Multi grouting system |
| CN101407395A (en) * | 2008-11-06 | 2009-04-15 | 昆明理工大学 | Fly ash-based grouting filler for mine |
| CN101709651A (en) * | 2009-12-21 | 2010-05-19 | 中铁隧道勘测设计院有限公司 | Grouting water blocking method for undersea tunnel |
| CN202531098U (en) * | 2012-04-01 | 2012-11-14 | 天地科技股份有限公司 | Broken coal-rock mass grouting system |
| CN103274650A (en) * | 2013-06-17 | 2013-09-04 | 长沙理工大学 | Injecting paste material for plugging water in tunnel of high-pressure karst area rich in water and preparation method of injecting paste material |
| CN103806922A (en) * | 2014-03-06 | 2014-05-21 | 华星诚森科技（北京）有限公司 | Traction grouting process |
-
2015
- 2015-04-28 CN CN201510206972.0A patent/CN104775789B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020057948A1 (en) * | 2000-08-10 | 2002-05-16 | Steinar Roald | Multi grouting system |
| CN101407395A (en) * | 2008-11-06 | 2009-04-15 | 昆明理工大学 | Fly ash-based grouting filler for mine |
| CN101709651A (en) * | 2009-12-21 | 2010-05-19 | 中铁隧道勘测设计院有限公司 | Grouting water blocking method for undersea tunnel |
| CN202531098U (en) * | 2012-04-01 | 2012-11-14 | 天地科技股份有限公司 | Broken coal-rock mass grouting system |
| CN103274650A (en) * | 2013-06-17 | 2013-09-04 | 长沙理工大学 | Injecting paste material for plugging water in tunnel of high-pressure karst area rich in water and preparation method of injecting paste material |
| CN103806922A (en) * | 2014-03-06 | 2014-05-21 | 华星诚森科技（北京）有限公司 | Traction grouting process |
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| CN104775789B (en) | 2017-03-08 |
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