CN106320354A - Anti-seepage construction method for karst cave development stratum under overburden - Google Patents

Anti-seepage construction method for karst cave development stratum under overburden Download PDF

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Publication number
CN106320354A
CN106320354A CN201610705475.XA CN201610705475A CN106320354A CN 106320354 A CN106320354 A CN 106320354A CN 201610705475 A CN201610705475 A CN 201610705475A CN 106320354 A CN106320354 A CN 106320354A
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China
Prior art keywords
hole
grouting
cover layer
seepage
stratum
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CN201610705475.XA
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Chinese (zh)
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CN106320354B (en
Inventor
张黎波
姜命强
王海东
赵志红
邱俊沣
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Sinohydro Bureau 8 Co Ltd
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Sinohydro Bureau 8 Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D19/00Keeping dry foundation sites or other areas in the ground
    • E02D19/06Restraining of underground water
    • E02D19/12Restraining of underground water by damming or interrupting the passage of underground water
    • E02D19/16Restraining of underground water by damming or interrupting the passage of underground water by placing or applying sealing substances
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00Production methods
    • E02D2250/003Injection of material

Abstract

The invention discloses an anti-seepage construction method for karst cave development stratum under overburden. The anti-seepage construction method comprises the following steps: S1, overburden drilling with a casing; S2, full-section drilling of basement and karst cave stratum; S3, drill-hole cleaning of basement and karst cave stratum; S4, grouting of basement and karst cave stratum; S5, grouting of overburden; and S6, hole sealing. The anti-seepage construction method has the advantages of simplicity in construction, favorable quality, controllable cost and high efficiency.

Description

Under cover layer, solution cavity grows the Seepage method on stratum
Technical field
The invention mainly relates to the Seepage technology of karst area ground, particularly relate to solution cavity under a kind of cover layer and grow The Seepage method on stratum.
Background technology
Along with the development of water resources and hydropower construction, grouting technique is developed at a gallop, but the most also exists at theoretical side Proceeding to explore, the particularly grouting treatment technology in karst area is the most immature.The ground water penetration of karst area is extremely strong, Building a dam on the basement rock of karsts developing area, the process of dam foundation, reservoir periphery and reservoir leakage passage is very important, simultaneously The construction technology and the construction technology that process are the most complicated.Current domestic karst area seepage control processing construction technique mainly has (rapid hardening) In cream slurry grouting technique, film bag grouting technique, solution cavity, method deep hole curtain is closed in High-Injection Technique, filling concrete technology, aperture The construction technologies such as curtain grouting technique, but it is less to put into practice construction experience for multilamellar karst area under deep covering layer, uses and passes System karst barrier technology is primarily present following shortcoming: one, engineering geological condition is complicated, collapse hole easily occurs, fall in boring procedure The abnormal conditions such as brill, burying, drilling accident is more, and pore-forming difficulty, repeatedly pore-creating, cleaning bottom of hole cost are bigger;Two, filling equipment is bored more Falling behind, machinery service efficiency, labor efficiency are relatively low, and construction speed is slow;Three, filling process is complicated, and filling process controls simultaneously Requiring higher, grouting range of scatter is relatively big, and grouting material consumes relatively big, and waste is serious.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, it is provided that a kind of construction is simple, quality is good, The Seepage method that cost is controlled, solution cavity grows stratum under the cover layer of high efficiency.
For solve above-mentioned technical problem, the present invention by the following technical solutions:
Under a kind of cover layer, solution cavity grows the Seepage method on stratum, comprises the following steps:
S1: cover layer is holed with pipe: utilizes percussive drill eccentric drilling device to creep at clay and severely-weathered cover layer, utilizes set simultaneously Hole wall is protected in pipe follow-up;
S2: basement rock and the boring of Karst Cave Formation tunneling boring: pull out of hole and change drilling tool, utilizing churn drilling tools to enter at basement rock and Karst Cave Formation Row full-face drilling, reaches to design hole depth and requires to terminate;
S3: basement rock and Karst Cave Formation cleaning bottom of hole: pull out of hole and change drilling rod and drill bit, utilizing grouting conduit under percussive drill, under conduit End installs hollow alloy bit, is drilled down into cleaning bottom of hole, simultaneously landwaste and the charges that cave in flushing hole, until design hole depth;
S4: basement rock and Karst Cave Formation grouting: utilize conduit and hollow alloy bit as rockfill grouting equipment, segmentation from the bottom to top Grouting is until sleeve bottom;
S5: blanket grouting: when utilizing cover layer to creep into follow-up sleeve pipe as grouting equipment, packer grouting from the bottom to top until Aperture;
S6: sealing of hole: aperture is carried out sealing treatment.
Further improvement as technique scheme:
In step sl, boring is goed deep into basement rock 1m and is terminated, and aperture is not less than Φ 150mm.
In step s 2, aperture is between Φ 130mm to Φ 150mm.
In step s3, after cleaning bottom of hole, hole depth error is less than 20cm, and duct wall thickness is more than 3mm, and aperture is at Φ 110mm extremely Between Φ 130mm.
In step s 4, rockfill grouting material is cement mortar and pea gravel concreten.
In step s 5, grouting material is cement mortar and cement mortar.
Compared with prior art, it is an advantage of the current invention that:
Under the cover layer of the present invention, solution cavity grows the Seepage method on stratum, grows for multilayer karst cave under deep covering layer Complex geological condition, uses percussive drill to carry out pipe-following drilling according to Different Strata condition, full-face drilling, conduit cleaning bottom of hole are tied mutually Close creep into mode, can fast, efficient, safe ground complete Completion of Drilling Hole construction, largely reduce complex karst stratum Drilling accident, can avoid repeatedly holing, cleaning bottom of hole cannot the difficult problem of pore-forming, utilize grouting conduit as cleaning bottom of hole drilling rod, simplify Technological process, saves construction cost and duration.The rockfill grouting mode of conduit from bottom to top of the present invention, technological process is simple, Small-sized concrete mixer easy to operate, available and the on-the-spot artificial mixing backfill solution cavity of concrete grouting pump commonly use cement mortar And pea gravel concreten, the long distance transportation of backfilling material can be avoided, so can ensure the seriality of grouting, reduce the damage of material Consumption, improves construction quality, and can shorten again the engineering time, save construction cost, raising efficiency of construction;Meanwhile, sleeve grouting Utilizing protection casing to be in the milk, eliminate the worry of collapse hole in boring and filling process, grouting segment length is shorter, grouting pressure foot Enough, less seepage channel is effectively irrigated, and grouting effect is good.It is molten that this construction technology achieves multilamellar under deep covering layer The stratum that hole is grown quickly carries out effective filling and blocking to bedrock leakage passage, the cover layer that permeability is stronger carries out grouting and squeezes Close so that it is cementing closely knit, improve bearing capacity and the non-deformability of cover layer, thus form the most effective antiseepage curtain body, anti- Ooze respond well, it is possible to be applicable to large-scale seepage prevention of cofferdam and reservoir area water-retention foundation construction, be particularly suitable at cofferdam fast blockage Engineering uses.
Accompanying drawing explanation
Fig. 1 is the construction schematic diagram of the Seepage method that solution cavity grows stratum under cover layer of the present invention.
Fig. 2 is the flow chart of the Seepage method that solution cavity grows stratum under cover layer of the present invention.
In figure, each label represents:
1, sleeve pipe;2, conduit.
Detailed description of the invention
Below with reference to Figure of description and specific embodiment, the present invention is described in further details.
As depicted in figs. 1 and 2, under cover layer of the present invention, solution cavity grows a kind of embodiment of the Seepage method on stratum, Comprise the following steps:
S1: cover layer is holed with pipe: utilizes percussive drill eccentric drilling device to creep at clay and severely-weathered cover layer, utilizes set simultaneously Hole wall is protected in pipe 1 follow-up;
S2: basement rock and the boring of Karst Cave Formation tunneling boring: pull out of hole and change drilling tool, utilizing churn drilling tools to enter at basement rock and Karst Cave Formation Row full-face drilling, reaches to design hole depth and requires to terminate;
S3: basement rock and Karst Cave Formation cleaning bottom of hole: pull out of hole and change drilling rod and drill bit, utilize grouting conduit 2 under percussive drill, conduit 2 Hollow alloy bit is installed in lower end, is drilled down into cleaning bottom of hole, simultaneously landwaste and the charges that cave in flushing hole, until design hole depth;
S4: basement rock and Karst Cave Formation grouting: utilize conduit 2 and hollow alloy bit as rockfill grouting equipment, divide from the bottom to top Section grouting is until bottom sleeve pipe 1;
S5: blanket grouting: when utilizing cover layer to creep into, the sleeve pipe 1 of follow-up is as grouting equipment, and packer grouting is straight from the bottom to top To aperture;
S6: sealing of hole: aperture is carried out sealing treatment.
Under the cover layer of the present invention, solution cavity grows the Seepage method on stratum, sends out for multilayer karst cave under deep covering layer The complex geological condition educated, uses percussive drill to carry out pipe-following drilling according to Different Strata condition, full-face drilling, conduit 2 are swept What hole combined creeps into mode, can fast, efficient, safe ground complete Completion of Drilling Hole construction, reduce complicated rock largely The drilling accident on molten stratum, can avoid repeatedly holing, cleaning bottom of hole cannot the difficult problem of pore-forming, utilize grouting conduit 2 to bore as cleaning bottom of hole Bar, simplifies technological process, saves construction cost and duration.The conduit from bottom to top 2 rockfill grouting mode of the present invention, technique stream Journey is simple and convenient to operate, available small-sized concrete mixer and concrete grouting pump scene artificial mixing backfill solution cavity is commonly used Cement mortar and pea gravel concreten, can avoid the long distance transportation of backfilling material, so can ensure the seriality of grouting, reduce material The loss of material, improves construction quality, and can shorten again the engineering time, save construction cost, raising efficiency of construction;Meanwhile, set Pipe 1 grouting utilizes protection casing 1 to be in the milk, and eliminates the worry of collapse hole in boring and filling process, and grouting segment length is shorter, grouting Pressure is enough, and less seepage channel is effectively irrigated, and grouting effect is good.This construction technology achieves under deep covering layer The stratum that multilayer karst cave is grown quickly carries out effective filling and blocking to bedrock leakage passage, carries out the cover layer that permeability is stronger It is in the milk compacted so that it is cementing closely knit, improves bearing capacity and the non-deformability of cover layer, thus form the most effective antiseepage curtain Body, anti-seepage effect is good, it is possible to is applicable to large-scale seepage prevention of cofferdam and reservoir area water-retention foundation construction, is particularly suitable in cofferdam quick Stoppage engineering uses.
In the present embodiment, in step sl, by construction drawing requirement field lofting, after levelling of the land, correct percussive drill, right Cover layer carries out pipe-following drilling, and sleeve pipe 1 follows up retaining wall, and boring is goed deep into basement rock 1m and terminated, and aperture is not less than Φ 150mm.
In the present embodiment, in step s 2, aperture is between Φ 130mm to Φ 150mm.
In the present embodiment, in step s3, hit brill and pull out of hole, change drilling rod and drill bit, utilize grouting conduit under percussive drill 2, hollow alloy bit is installed in conduit 2 lower end, is drilled down into cleaning bottom of hole, simultaneously landwaste and the charges that cave in flushing hole, until setting Meter hole depth, after cleaning bottom of hole hole depth error be less than 20cm, conduit 2 pipe thickness be more than 3mm, aperture Φ 110mm to Φ 130mm it Between.
In the present embodiment, in step s 4, utilize hole sweep drilling tool and hollow alloy bit as rockfill grouting conduit, backfill Grouting material is cement mortar, pea gravel concreten, and according to different geologic requirements, strength of cement mortar is not preferably less than M15, and denseness is suitable Controlling 100mm~120mm, pea gravel concreten intensity is not preferably less than C15, and the particle diameter of the microlith in pea gravel concreten is preferably less than 10mm, the slump preferably controls 240mm~260mm.Cleaning bottom of hole is pulled out 50cm to the grouting conduit 2 at the bottom of hole, by grouting conduit 2 to Rockfill grouting in hole, according to borehole data analysis, secondary to the section that there is cavity solution cavity or leakage passage, directly backfill microlith coagulation Soil, grouting pressure is not preferably less than 1MPa, and when pea gravel concreten substantially fills to enter stratum, conversion cement injection mortar fills Note, treats that mortar injection persistently reduces, and during until being less than 10L/min, continuing perfusion preferably less than 10min and terminating.This section has been in the milk Cheng Hou, measures the dead band degree of depth in grouting conduit 2, intermittently again measures, if the difference recording twice dead band degree of depth is big after 10~20min In 1m, continue perfusion mortar 5~10min, repeated measure and perfusion, until the difference of the dead band degree of depth is less than 1m, this section can be terminated Grouting.If this section time does not exist cavity solution cavity or leakage passage, then direct cement injection mortar, terminates until meeting requirement.Pull out Before grouting conduit 2, measuring hole depth in grouting conduit 2, determine that conduit 2 gos deep into the degree of depth in concrete or mortar, tube drawing length is necessary It is shorter than conduit 2 and gos deep into the degree of depth in concrete or mortar, it is ensured that conduit 2 outlet is positioned at concrete or mortar, every tube drawing one, surveys Measuring a pipe orifice deep, tube drawing length is not preferably greater than 3.0m every section time.
In the present embodiment, in step s 5, when utilizing cover layer to creep into, the protection casing 1 of follow-up is in the milk, injection material Material is for cement mortar, cement mortar, after basement rock inner catheter 2 rockfill grouting terminates, rises and pulls out sleeve pipe 1, be in the milk the most piecemeal by Easy collapse hole after tube drawing, each grouting segment length can not be oversize, depending on the stable case on stratum, generally no greater than 3.0m.
In other embodiments, it is possible to rise and pull out top 50cm at the bottom of grouting conduit 2 to contact-segment section, packer 10 is installed to dock Touch section 9 to be in the milk.
In the present embodiment, after whole hole has irrigated, employing conduit 2 slip casting method sealing of hole, section drying shrinkage part in aperture after sealing of hole, First blow off aperture laitance and sewage etc. with high-pressure blast, more closely knit with cement mortar filling.Backfill sealing of hole backfills in must assure that hole The packing of material own is compacted, and backfill material is combined closely with hole wall, cave of not boxing out, water-tight.
Although the present invention discloses as above with preferred embodiment, but is not limited to the present invention.Any it is familiar with ability The technical staff in territory, in the case of without departing from technical solution of the present invention scope, may utilize the technology contents pair of the disclosure above Technical solution of the present invention makes many possible variations and modification, or is revised as the Equivalent embodiments of equivalent variations.Therefore, every Without departing from the content of technical solution of the present invention, according to the technology of the present invention essence to any simple modification made for any of the above embodiments, Equivalent variations and modification, all should fall in the range of technical solution of the present invention is protected.

Claims (6)

1. under a cover layer, solution cavity grows the Seepage method on stratum, it is characterised in that: comprise the following steps:
S1: cover layer is holed with pipe: utilizes percussive drill eccentric drilling device to creep at clay and severely-weathered cover layer, utilizes set simultaneously Hole wall is protected in pipe (1) follow-up;
S2: basement rock and the boring of Karst Cave Formation tunneling boring: pull out of hole and change drilling tool, utilizing churn drilling tools to enter at basement rock and Karst Cave Formation Row full-face drilling, reaches to design hole depth and requires to terminate;
S3: basement rock and Karst Cave Formation cleaning bottom of hole: pull out of hole and change drilling rod and drill bit, utilize grouting conduit under percussive drill (2), conduit (2) hollow alloy bit is installed in lower end, is drilled down into cleaning bottom of hole, simultaneously landwaste and the charges that cave in flushing hole, until design hole Deeply;
S4: basement rock and Karst Cave Formation grouting: utilize conduit (2) and hollow alloy bit as rockfill grouting equipment, from the bottom to top Packer grouting until sleeve pipe (1) bottom;
S5: blanket grouting: when utilizing cover layer to creep into, the sleeve pipe (1) of follow-up is as grouting equipment, packer grouting from the bottom to top Until aperture;
S6: sealing of hole: aperture is carried out sealing treatment.
Under cover layer the most according to claim 1, solution cavity grows the Seepage method on stratum, it is characterised in that: in step In S1, boring is goed deep into basement rock 1m and is terminated, and aperture is not less than Φ 150mm.
Under cover layer the most according to claim 2, solution cavity grows the Seepage method on stratum, it is characterised in that: in step In S2, aperture is between Φ 130mm to Φ 150mm.
Under cover layer the most according to claim 3, solution cavity grows the Seepage method on stratum, it is characterised in that: in step In S3, after cleaning bottom of hole hole depth error be less than 20cm, conduit (2) pipe thickness be more than 3mm, aperture Φ 110mm to Φ 130mm it Between.
Under cover layer the most according to claim 4, solution cavity grows the Seepage method on stratum, it is characterised in that: in step In S4, rockfill grouting material is cement mortar and pea gravel concreten.
Under cover layer the most according to claim 5, solution cavity grows the Seepage method on stratum, it is characterised in that: in step In S5, grouting material is cement mortar and cement mortar.
CN201610705475.XA 2016-08-23 2016-08-23 The Seepage method on solution cavity development stratum under coating Active CN106320354B (en)

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CN106837411A (en) * 2017-02-04 2017-06-13 长江勘测规划设计研究有限责任公司 The arrangement and method of a kind of buried shield tunnel filling and injecting slurry
CN108729438A (en) * 2018-05-28 2018-11-02 湖南宏禹工程集团有限公司 A kind of administering method in karst area channel
CN109667537A (en) * 2017-10-16 2019-04-23 湖北中南勘察基础工程有限公司 A kind of drilling process of prospecting filling land pebble solution cavity
CN109779680A (en) * 2019-01-22 2019-05-21 西安理工大学 A kind of buried Coal Under ore goaf grout hole plasm stopping technique of strong artesian aquifer

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106837411A (en) * 2017-02-04 2017-06-13 长江勘测规划设计研究有限责任公司 The arrangement and method of a kind of buried shield tunnel filling and injecting slurry
CN106837411B (en) * 2017-02-04 2020-04-03 长江勘测规划设计研究有限责任公司 Arrangement structure and method for filling and grouting of deep-buried shield tunnel
CN109667537A (en) * 2017-10-16 2019-04-23 湖北中南勘察基础工程有限公司 A kind of drilling process of prospecting filling land pebble solution cavity
CN109667537B (en) * 2017-10-16 2020-06-30 湖北中南勘察基础工程有限公司 Drilling process for surveying and filling pebble soil karst cave
CN108729438A (en) * 2018-05-28 2018-11-02 湖南宏禹工程集团有限公司 A kind of administering method in karst area channel
CN109779680A (en) * 2019-01-22 2019-05-21 西安理工大学 A kind of buried Coal Under ore goaf grout hole plasm stopping technique of strong artesian aquifer

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