CN101408089A - Construction method of buried depth monitoring instrument poreforming and anchorage cable poreforming under unfavorable geological condition - Google Patents
Construction method of buried depth monitoring instrument poreforming and anchorage cable poreforming under unfavorable geological condition Download PDFInfo
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- CN101408089A CN101408089A CN 200810162105 CN200810162105A CN101408089A CN 101408089 A CN101408089 A CN 101408089A CN 200810162105 CN200810162105 CN 200810162105 CN 200810162105 A CN200810162105 A CN 200810162105A CN 101408089 A CN101408089 A CN 101408089A
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Abstract
The invention relates to a construction method of pore-forming by an anchor rope and pore-forming by deeply burying a monitoring instrument. The technical problem to be solved by the invention is that a construction method is provided so as to complete pore-forming smoothly with minimum cost on a slope body of the digging edge with serious geological defects of serious weathering, rock breaking, large fracture opening and the like. The technical proposal for solving the problem is as follows: 1) when sticking occurs and drilling ahead is difficult to carry out, color stripe cloth or a piece of kraft paper is made into a long stripe which has the same length with the depth of the pore and is provided with a bottom sub; 2) a single bamboo board is used for supporting the cap-shaped bottom sub and supporting and conveying the long stripe to the pore bottom of the anchor rope; 3) neat cement paste which is stirred uniformly is injected into the pore along the long stripe, and after solidification is carried out for 30 to 40h, i.e., the strength is over 3MPa, the cleaning bottom of the pore is carried out so as to achieve the lining effect of the pore wall; and 4) according to the pore-forming method on an undamaged rock mass, the following procedures of rope-penetrating of the anchor rope and cement grouting are completed. The invention is used for deep supporting engineering of the anchor rope of the slope of the digging edge of water conservancy and hydropower engineering, traffic, mines and the like.
Description
Technical field
The present invention relates to anchor cable pore-forming and buried depth monitoring instrument pore-forming engineering, especially a kind of under unfavorable geological condition the job practices of anchor cable pore-forming and buried depth monitoring instrument pore-forming.Be applicable in the engineering of excavation slope anchor cable deep supports such as various Hydraulic and Hydro-Power Engineerings, traffic, mine, buried depth monitoring instrument pore-forming.
Background technology
In the anchor cable construction; be in and collapse slide rock piece gravelly soil; disturbed belt is extremely grown; rock mass is lax strongly; the IV that the crack opening width is big; the country rock position of geological conditions extreme differences such as V class rock mass; bit freezing appears in regular meeting; fall the very difficult problems of pore-forming such as drill bit; and in pore forming process, must adopt country rock is carried out consolidation grouting (low pressure; speed limit; underflow; the coarse sand slurry; churning; intermittently; stop irritating and wait to coagulate; mix grouting measures such as early strength admixture) or take piecemeal method with the pipe hole that prevents to collapse; this not only has a strong impact on the duration (once becoming a dark anchor cable hole time spent of 60m to compete above 15 days); the more important thing is that the consolidation grouting grout consumption is especially big (according to statistics at voe; the grouting amount in part side slope anchor cable holes such as land owned by officials competes to reach 80t～t more than 200); at this serious restriction duration; the difficult problem that the investment objective realizes does not also produce a kind of efficient and worker's method energy-conservation province duration so far both at home and abroad and addresses the above problem.
Summary of the invention
The technical problem to be solved in the present invention is: be the problem of anchor cable and buried depth monitoring instrument pore-forming difficulty under effective solution unfavorable geological condition, the invention provides the job practices of anchor cable pore-forming and buried depth monitoring instrument pore-forming under a kind of unfavorable geological condition, be intended to by simple, practical, job practices efficiently,, rock crushing serious in weathering with minimum cost, crack opening width are big etc. has on the excavation slope body of serious geology defective, finish above-mentioned pore-creating smoothly, guarantee immediate support and monitoring the country rock deep layer.
The technical solution adopted in the present invention is: the job practices of anchor cable pore-forming and buried depth monitoring instrument pore-forming under a kind of unfavorable geological condition is characterized in that step is as follows:
1) when bit freezing occurring and being difficult to creep into situation again, should in time stop to creep into, with flexible material, colour bar cloth or kraft as the job site, being cut into wide is about 4/5 of hole girth, and along connecing the rectangular band of growing into hole depth, with rectangular band is folded into the hat plug again, available paper or the filling of bag of cement sheet become stereo structure, keep being unlikely to subside behind the hand-hole;
2) gather materials on the spot, withstand the hat plug, at the bottom of the smooth-going subsides rectangular band slowly pushed up and send at the bottom of the through hole, anchor cable hole, fall short of, can adopt method to guarantee that bamboo bar length satisfies the hole depth requirement at aperture colligation overlap joint as single Bamboo strip plate with single Bamboo strip plate;
3) will mix the cement paste that makes, proportion is more than 1.97, carry in the rectangular belt surface injection hole of small pieces of cloth used for patches, can be in the aperture coarse sand be dashed together along cement paste this moment and admix in the hole, the attention Bamboo strip plate should in time be extracted out after injecting a few decaliter slurries, filling process is unsuitable, and intermittently a gas is filled with and is finished, and waiting to solidify behind 30～40h is that intensity is then carried out cleaning bottom of hole when surpassing 3Mpa and reached hole wall lining cutting effect;
4), finish ensuing anchor cable and reeve and grouting procedure according to hole forming method on intact rock mass.
In the above-mentioned job practices, when the rock mass crack width is above greater than 4cm, then take to solve in the method for large fracture position bridging shop fixtures grouting pore-forming: the probe or the head that utilize head to be 60 ° of circular arcs are down L shaped probe, adopting the enough reinforcing bars of length to bend forms, long 5-7cm pops one's head in, with galvanized wire described probe colligation is fixed on long enough Bamboo strip plate termination, go deep into to the large fracture position is arranged along the anchor cable hole always, in case probe occurring meets in the time of can not continuing to advance after the crack resistance falls into, take the push-and-pull Bamboo strip plate to drive the mode that probe moves around at once in the crack, measure the particular location and the width in crack in the aperture, and according to the size that measures hole depth of living in position, crack, the corresponding site of the rectangular band of small pieces of cloth used for patches with length be the 3-5 root pin chips of 100-150cm or thin branch along the hole axially side by side at interval colligation form the overlap joint bridge at rectangular band central part, and make the rectangular just in time suitable two ends of carrying on a shoulder pole of this overlap joint bridge behind the hole of bringing in the crack.
The width of described rectangular band should be greater than girth 20-30cm under the serious situation of crack, and dual-side overlap joint back will be followed closely with the every interval of stapler 15-20cm section, makes the long tube that mortar still can be leaked in the top.
The present invention is carrying out the built on stilts rock mass aperture slip casting of large fracture towards mixing in the selection of coarse sand hand-hole, can adopt sawdust, husk, broken straw or the coarse sand of hand hay cutter to fill.
The invention has the beneficial effects as follows: the present invention has adopted simply, practical, effective peripheral leakproof small pieces of cloth used for patches technology, successfully solved the deep layer pore-creating problem under unfavorable geological condition, thoroughly having improved in the past can only be by pore-creating time-consuming, that power consumption and success rate are low in a large number, the poor efficiency way of consolidation grouting pore-forming.The present invention tests by pore-creating in the country rock that contains multiple complicated geological defective, its effect is very good, success rate is 100%, obtain a major technological breakthrough of maximum engineering performance beyond doubt with minimum cost, if can in construction fields such as national water power, road, apply the technology of the present invention, will bring comprehensive benefits such as huge economy, duration, the energy, environmental protection.
Description of drawings
Fig. 1 is the elevation in aperture, anchor cable of the present invention hole.
Fig. 2 is the upward view that hole, anchor cable of the present invention hole body has location of cracks.
Fig. 3 is the stereogram of band probe Bamboo strip plate among the present invention.
Fig. 4 is the schematic diagram of the embodiment of the invention 2 at large fracture place overlap joint bridge.
The specific embodiment
Every on the serious rock mass 1 of geology defective during construction anchor cable hole 2, if in case bit freezing occurs and when being difficult to creep into again, should not execute brill by force, tend to like this do not caused useless hole by thorough stuck getting to come out because of drill bit, then should in time stop, then hole inside lining grouting treatment is carried out in this section anchor cable hole, concrete steps are:
1) with flexible material, as the colour bar cloth of job site or kraft etc. all can, be cut into wide about 4/5 of the hole girth that is, and grow into the rectangular of hole depth and be with 5 along connecing, with rectangular band one is folded into the hat plug again, and available paper or the filling of bag of cement sheet become stereo structure, keeps being unlikely to subside behind the hand-hole;
2) gather materials on the spot, withstand hat plug (noting firmly suitably) with single Bamboo strip plate 3, at the bottom of the smooth-going subsides with rectangular be with 5 slowly through holes, anchor cable hole 2 sent on the top at the bottom of, fall short of as single Bamboo strip plate, can adopt method to guarantee that bamboo bar length satisfies the hole depth requirement at aperture colligation overlap joint;
3) will mix the cement paste that makes, proportion is more than 1.97, carrying over the rectangular of small pieces of cloth used for patches is with in the 5 surperficial injection holes, can be in the aperture coarse sand be dashed together along cement paste this moment and admix in the hole, the attention Bamboo strip plate should in time be extracted out after injecting a few decaliter slurries, filling process is intermittently unsuitable, (about general 35m dark hole according to the about time spent 5min of crack degree about) filled with and finished to one gas, wait to solidify behind 30～40h is that intensity then can be carried out lining cutting (cleaning bottom of hole) when surpassing 3Mpa, hole wall effect after finishing, be equivalent to the anchor cable hole wall has been carried out cement mortar lining cutting supporting, reach not spillage, the do not collapse effect in hole;
4) according to the method for pore-forming on intact rock mass 1, finish ensuing anchor cable and reeve and grouting procedure.
The whole series flow process has reached the purpose of the province's slurry that saves time, and obviously aforesaid operations also can be used in the engineering of the vertical pore-forming of buried depth monitoring instrument, only needs to be with 5 to make banded getting final product with rectangular.In practical operation, might run into will be through the once above above-mentioned process of operation repeatedly, final ability pore-forming, and this also just repeats above-mentioned steps several times, but this situation seldom occurs.It should be noted when back-grouting, needn't be to cleaning bottom of hole (lining cutting) section perfusion (available bamboo bar very easily leans out the degree of depth) more.
It is very poor also can to meet the rock mass geology condition in practice of construction, crack broad and dark, as rock mass 1 crack 2-1 greater than 4cm when above, can take to solve for this situation in the method for large fracture position bridging shop fixtures grouting pore-forming, in order to avoid occur because of the mortar that bearing capacity takes place to inject inadequately the flexible strip band being pressed into crack (even making whole rectangular band pressurized crash into the crack), concrete steps are:
1) with flexible material, as the colour bar cloth of job site or kraft etc. all can, be cut into the band shape of width greater than anchor cable hole girth 20-30cm, satisfy rectangular that hole depth requires and be with 5 along being connected into again;
2) probe 4 or the head that utilizes head to be 60 ° of circular arcs is down L shaped probe, in order to verify the particular location and the width of anchor cable hole internal fissure, probe adopts the enough reinforcing bars of length to bend and forms (round steel of available Φ 5-10), the long 5-7cm of feeler, described probe colligation is fixed on the termination of long enough Bamboo strip plate 3 with galvanized wire, go deep into to the large fracture position is arranged along anchor cable hole 2 always, in case probe occurring meets in the time of can not continuing to advance after the crack resistance falls into, take the push-and-pull Bamboo strip plate to drive the mode that probe moves around at once in the crack, measure the particular location and the width in crack in the aperture, and according to the size that measures hole depth of living in position, crack, small pieces of cloth used for patches rectangular with 5 corresponding site with length be the 3-5 root pin chips of 100-150cm or thin branch along the hole axially side by side at interval form overlap joint bridge 6 with galvanized wire 7 colligations at rectangular band central part, and make the rectangular just in time suitable two ends of carrying on a shoulder pole of this overlap joint bridge behind the hole of bringing in the crack.Weighing down comes to nothing can not reach the specific question of lining cutting effect in large fracture thereby the mortar that the rectangular band that has successfully solved small pieces of cloth used for patches causes pouring into because of self bearing strength is inadequately all pressed it.
3) follow closely with the every interval of stapler 15-20cm section the rectangular 5 dual-sides overlap joint back of being with that will be tied with overlap joint bridge 6, make the long tube that mortar still can be leaked in the top, one that will grow tube again is folded into the hat plug, and available paper or the filling of bag of cement sheet become stereo structure, keeps being unlikely to subside behind the hand-hole;
4) probe that will be fixed on Bamboo strip plate 3 heads takes off, directly withstand hat plug (noting firmly suitably) with Bamboo strip plate, to grow tube at the bottom of the smooth-going subsides slowly sends at the bottom of the 2 through holes, anchor cable hole on the top, fall short of as single Bamboo strip plate, can adopt method to guarantee that bamboo bar length satisfies the hole depth requirement at aperture colligation overlap joint;
5) will mix the cement paste that makes, proportion is more than 1.97, carry in the long tube injection hole of small pieces of cloth used for patches, can be in the aperture coarse sand be dashed together along cement paste this moment and admix in the hole, carrying out the built on stilts rock mass aperture slip casting of large fracture towards mixing in the selection of coarse sand hand-hole, also can adopt sawdust, husk or cut up with a hay cutter broken fillings such as straw, the attention Bamboo strip plate should in time be extracted out after injecting a few decaliter slurries, filling process is intermittently unsuitable, (about general 35m dark hole according to the about time spent 5min of crack degree about) filled with and finished to one gas, wait to solidify behind 30～40h is that intensity then can be carried out lining cutting (cleaning bottom of hole) when surpassing 3Mpa, hole wall effect after finishing, be equivalent to the anchor cable hole wall has been carried out cement mortar lining cutting supporting, reach not spillage, the do not collapse effect in hole;
6) according to the method for pore-forming on intact rock mass 1, finish ensuing anchor cable and reeve and grouting procedure.
Owing to adopt long tube to replace rectangular band, and long tube girth very easily embeds the rock mass location of cracks and forms fold greater than the hole girth after slip casting, more help retaining wall lining cutting effect in this example.Simultaneously, carrying out the built on stilts rock mass aperture slip casting of large fracture towards mixing in the selection of coarse sand hand-hole, as adopt sawdust, husk or cut up with a hay cutter broken straw and coarse sand mixes more favourable to the shutoff of large fracture spillage as filler, because of unfavorable geological conditions situation often appears at apart from the stretch-draw section of cofferdam case depth 2～30m, and this section purpose is intended to pore-forming, again owing to when the intensity of backfilling cement pulp mixture is greater than 3Mpa, just carry out cleaning bottom of hole, the lining cutting of finishing hole wall gets final product, and therefore needn't investigate the strength problem of above-mentioned filler.
The present invention and traditional construction technology are investment, being compared as follows aspect the progress:
According to voe power station, Yunnan 2#, the 6# ridge, power station, land owned by officials, Sichuan deformable body, sliding mass, big boulder and left and right banks cable machine platform part anchor cable hole are adopted traditional handicraft and are adopted technology slip casting of the present invention, the data of pore-forming relatively, when adopting traditional handicraft, 1 above (voe power station 2# of anchor cable hole palpus consolidation grouting water consumption mud 40～200t, 6# ridge part anchor cable single hole has irritates t's more than 200), and after using technology of the present invention, general only need pouring between 4～10t gets final product (and hole depth, the rock mass defect level is relevant), on the time spent,, this does not need intermittently control because being in the milk, fill without letup, about wait 30h, get final product the lining cutting pore-forming that cleaning bottom of hole is finished hole, part crack section afterwards, during waiting for cleaning bottom of hole, still can continue to carry out the construction in other holes simultaneously with same technology, each bench drill forms continuous productive process naturally, according to power station, land owned by officials 4# deformable body and the actual anchor cable hole statistical confirmation of finishing of left and right banks cable machine platform, in obvious geology defective country rock is arranged, adopt new technology and make 1 hole (hole depth 50～60m) often only needs 4～6 day time can pore-forming and possess the condition of reeving, if adopt under the same geological conditions of traditional handicraft and make 1 hole, then must be more than 14 days the time, and to spend a large amount of cement, sleeve pipe, cost such as artificial, even the finally result in useless hole also can appear.Usually cause being in the duration target appears being forced to adjust in engineering on the critical circuits because of the delay of its degree of depth supporting construction problem.
Claims (4)
1, the job practices of anchor cable pore-forming and buried depth monitoring instrument pore-forming under a kind of unfavorable geological condition is characterized in that step is as follows:
1) when bit freezing occurring and being difficult to creep into situation again, should in time stop to creep into, with flexible material, colour bar cloth or kraft as the job site, being cut into wide is about 4/5 of hole girth, and along connecing the rectangular band (5) of growing into hole depth, with rectangular band is folded into the hat plug again, available paper or the filling of bag of cement sheet become stereo structure, keep being unlikely to subside behind the hand-hole;
2) gather materials on the spot, withstand the hat plug, at the bottom of the smooth-going subsides rectangular band slowly pushed up and send at the bottom of the through hole, anchor cable hole (2), fall short of, can adopt method to guarantee that bamboo bar length satisfies the hole depth requirement at aperture colligation overlap joint as single Bamboo strip plate with single Bamboo strip plate (3);
3) will mix the cement paste that makes, proportion is more than 1.97, carry in the surperficial injection hole of rectangular band (5) of small pieces of cloth used for patches, can be in the aperture coarse sand be dashed together along cement paste this moment and admix in the hole, the attention Bamboo strip plate should in time be extracted out after injecting a few decaliter slurries, filling process is unsuitable, and intermittently a gas is filled with and is finished, and waiting to solidify behind 30～40h is that intensity is then carried out cleaning bottom of hole when surpassing 3Mpa and reached hole wall lining cutting effect;
4) according to going up hole forming method, finish ensuing anchor cable and reeve and grouting procedure at intact rock mass (1).
2, job practices according to claim 1, it is characterized in that: when rock mass (1) crack width (2-1) is above greater than 4cm, then take to solve in the method for large fracture position bridging shop fixtures grouting pore-forming: the probe (4) or the head that utilize head to be 60 ° of circular arcs are down L shaped probe, adopting the enough reinforcing bars of length to bend forms, long 5-7cm pops one's head in, with galvanized wire described probe colligation is fixed on long enough Bamboo strip plate (3) termination, go deep into to location of cracks is arranged along anchor cable hole (2) always, in case probe occurring meets in the time of can not continuing to advance after the crack resistance falls into, take the push-and-pull Bamboo strip plate to drive the mode that probe moves around at once in the crack, measure the particular location and the width in crack in the aperture, and according to the size that measures hole depth of living in position, crack, the corresponding site of the rectangular band of small pieces of cloth used for patches (5) with length be the 3-5 root pin chips of 100-150cm or thin branch along the hole axially side by side at interval colligation form overlap joint bridge (6) at rectangular band central part, and make the rectangular just in time suitable two ends of carrying on a shoulder pole of this overlap joint bridge behind the hole of bringing in the crack.
3, job practices according to claim 1 and 2, it is characterized in that: the width of described rectangular band (5) is should be greater than girth 20-30cm under the serious situation of crack, and will follow closely with the every interval of stapler 15-20cm section behind the dual-side overlap joint, make the long tube that mortar still can be leaked in the top.
4, job practices according to claim 1 and 2 is characterized in that: carrying out the built on stilts rock mass aperture slip casting of large fracture towards mixing in the selection of coarse sand hand-hole, can adopt sawdust, husk, broken straw or the coarse sand of hand hay cutter to fill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101621051A CN101408089B (en) | 2008-11-11 | 2008-11-11 | Construction method of buried depth monitoring instrument poreforming and anchorage cable poreforming under unfavorable geological condition |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101621051A CN101408089B (en) | 2008-11-11 | 2008-11-11 | Construction method of buried depth monitoring instrument poreforming and anchorage cable poreforming under unfavorable geological condition |
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| CN101408089A true CN101408089A (en) | 2009-04-15 |
| CN101408089B CN101408089B (en) | 2011-11-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230357A (en) * | 2011-05-31 | 2011-11-02 | 中冶集团武汉勘察研究院有限公司 | Method for forming ultra-deep anchor hole in loose accumulation body and breakage rock layer |
| CN102660959A (en) * | 2012-05-31 | 2012-09-12 | 重庆大学 | Pulling reinforcement method for internal fissure of dangerous rock |
| CN112030998A (en) * | 2020-08-28 | 2020-12-04 | 中铁四局集团有限公司 | Method for constructing anchor cable in landslide body with cracks |
-
2008
- 2008-11-11 CN CN2008101621051A patent/CN101408089B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230357A (en) * | 2011-05-31 | 2011-11-02 | 中冶集团武汉勘察研究院有限公司 | Method for forming ultra-deep anchor hole in loose accumulation body and breakage rock layer |
| CN102660959A (en) * | 2012-05-31 | 2012-09-12 | 重庆大学 | Pulling reinforcement method for internal fissure of dangerous rock |
| CN102660959B (en) * | 2012-05-31 | 2014-06-04 | 重庆大学 | Pulling reinforcement method for internal fissure of dangerous rock |
| CN112030998A (en) * | 2020-08-28 | 2020-12-04 | 中铁四局集团有限公司 | Method for constructing anchor cable in landslide body with cracks |
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| Publication number | Publication date |
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| CN101408089B (en) | 2011-11-16 |
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