CN104594370A - High-pressure combined washing grouting method and structure in karst region - Google Patents

High-pressure combined washing grouting method and structure in karst region Download PDF

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Publication number
CN104594370A
CN104594370A CN201410695167.4A CN201410695167A CN104594370A CN 104594370 A CN104594370 A CN 104594370A CN 201410695167 A CN201410695167 A CN 201410695167A CN 104594370 A CN104594370 A CN 104594370A
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China
Prior art keywords
grouting
karst
pressure
associating
paste
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CN201410695167.4A
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CN104594370B (en
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屈昌华
郭维祥
余波
朱代强
昝廷东
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Powerchina Guiyang Engineering Corp Ltd
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Powerchina Guiyang Engineering Corp 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
    • E02D15/00Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02Handling of bulk concrete specially for foundation or hydraulic engineering purposes

Abstract

The invention discloses a high-pressure combined washing grouting method and structure in a karst region. When a filling-type karst cave or a grike exists in the grouting process, high-pressure water or wind flushes filler out, then cement mortar or cement paste of 0.5:1 is refilled, and a common cement grouting method is adopted for grouting 24-72 hours later after condensation. The high-pressure combined washing grouting method is an economical and efficient grouting processing technology specific to karst caves, grikes and the other geological flaw sections, and has the advantages of being simple (not needing special construction equipment and operators), obvious in washing effect, capable of largely improving construction efficiency and guaranteeing grouting quality, and the like. When the high-pressure combined washing grouting method and structure are used for grouting washing and grouting in the karst caves, grikes and the other geological flaw sections in the karst region, the design requirements can be met effectively and rapidly, the construction efficiency can be largely improved, and waste of grouting raw materials is reduced.

Description

Karst high pressure associating douche can paste-making method and structure thereof
Technical field
The present invention relates to karst geological disposal method, be specifically related to a kind of karst high pressure associating douche can paste-making method and structure thereof.
Background technology
Karst topography refers to that the water with corrosion power carries out to solublerock the general name that corrosion etc. acts on earth's surface and the underground form formed.Water, based on corrosion, also comprises the erosion of flowing water, shallow erosion, and the mechanical erosion process such as to collapse.
In the Hydraulic and Hydro-Power Engineering impervious grouting processing procedure of karst; often can run into filling-type Karst cave or corrosion fissure, or strong corrosion district, charges mostly are clay, loam; adopt conventional flushing and grouting method often not to reach designing requirement, and affect anti-seepage effect.
By current specifications (DL/T5148-2012) requirement, grout hole (section) will carry out crack and rinse and simple and easy setting-out (maximum pressure is not more than 1MPa) before grouting, whether carries out special flushing for regulation in the Special zone such as solution cavity, tomography specification according to designing requirement.At present, in Hydraulic and Hydro-Power Engineering, designing unit carries out normal developing to the General Requirements of the Special zone such as solution cavity, tomography, charges in solution cavity can not well be gone out by this normal developing method, affect again construction speed and quality, also have to adopt the method such as " encrypting grout hole between former grout hole " to process, make engineering quantity and investment increasing degree is comparatively large, the construction period significantly extends.
In karst Hydraulic and Hydro-Power Engineering impervious grouting " construction technical requirement ", simple and easy packer permeability test is rinsed to crack and generally have clear stipulaties, mostly be normal developing, when running into the Special zone such as solution cavity, corrosion fissure, fault zone, rare special rinsing requirement, before this conventional grout, flushing does not only reach the object of flushing, can worsen on the contrary by the performance of filling with rock mass, affect grouting quality.
Therefore, for the project seepage controlling grouting treatment of casta region, in prior art, desirable technical scheme is not still had.
Summary of the invention
The object of the invention is to the problem for solving to the project seepage controlling grouting treatment of casta region in prior art, a kind of karst high pressure associating douche can paste-making method is provided.
Technical scheme of the present invention is such:
First it is a kind of karst high pressure associating douche can paste-making method, when the method runs into filling-type Karst cave or corrosion fissure in filling process, by water under high pressure or high-pressure blast, water, charges are gone out the cement paste of rear backfill cement mortar or 0.5:1, after solidifying 24h ~ 72h, take traditional cements grouting method to pour into again.The method comprises the steps:
1) find out that solution cavity grows scale, the character of charges, roof and floor hole depth or elevation by boring or geophysical prospecting method; This work general grouting pilot hole (no longer increasing drilled grout hole) is carried out.
2) according to the solution cavity developmental state found out, the grout hole in the Geological Defects locations such as reasonable Arrangement solution cavity, corrosion fissure is as flushing hole, these grout holes are after being drilled into the hole depth residing for corresponding solution cavity or corrosion fissure, utilize two conventional high-pressure grout pumps (in parallel, Stress control is at 3 ~ 6MPa, during hole depth 40m ~ 100m, maximum pressure is no more than 25MPa) or press air compressor machine (Stress control 3 ~ 4 MPa) to carry out high pressure water washing or wind and water combined flushing in combining, charges in solution cavity are gone out from boring, until when aperture backwater is peace and quiet only.
3) answer cement paste or the cement mortar of quickly stuffing 0.5:1 after having rinsed, and treat solidifying 24h ~ 72h.
4) reach cleaning bottom of hole after the solidifying time and carry out conventional strengthening grouting, until reach designing requirement.
In order to realize such method, present invention employs so a kind of grouting structure being applicable to karst: it is the Geological Defects section for the treatment of karst, this Geological Defects section is positioned at the below of basement rock, this structure is provided with at least three borings, boring is vertically goed deep in basement rock, and the bottom of boring is in Geological Defects section; In three borings, at least two is geomantic omen import, and one for rinsing outlet.Preferably, two geomantic omen imports lay respectively at the both sides rinsing outlet.
High pressure of the present invention associating douche can paste-making method is for the one economy in the Geological Defects such as solution cavity, corrosion fissure location, efficiently grouting treatment technology, have method simple (not needing to increase special construction equipment and operating personnel), developing result significantly, construction efficiency can be increased substantially, ensure the advantages such as grouting quality.The present invention is with a kind of brand-new thinking, and the Geological Defects location such as solution cavity, corrosion fissure solving karst in simple, convenient, efficient mode is rinsed and grouting problem.Adopt the Geological Defects locations such as the solution cavity of the present invention in karst, corrosion fissure to carry out grouting to rinse with when being in the milk, designing requirement can be reached effectively and rapidly, and construction efficiency can be increased substantially and reduce grouting waste of raw materials.
Accompanying drawing explanation
Fig. 1 rinses grouting structural representation of the present invention associating.
Description of reference numerals: 1-basement rock, 2-holes, and 3-Geological Defects section, the import of 4-geomantic omen, 5-rinses outlet.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
First see Fig. 1, Fig. 1 illustrates laying structure of combining flushing grouting of the present invention, and as we can see from the figure, the present invention is to be processed is Geological Defects section 3, and this Geological Defects section 3 is arranged in basement rock 1, is building the below of engineering in advance.For each processing unit engineering, the present invention needs the boring 2 being drilled with more than three, and wherein two borings 2 are as geomantic omen import 4, and for rinsing the import that hole is wind and water, another boring 2 conduct rinses outlet 5, for rinsing the passage of emerging of thing.Geomantic omen import 4 in figure is positioned at the right and left, rinses outlet 5 and is positioned at centre.
Embodiment 1: the present invention is applied to the situation of large-scale filling-type Karst cave: this solution-cavity filling thing is mainly clay, clay burning into sand etc., and hole depth is 45m ~ 67m.In filling process, grouting pressure is difficult to reach designing requirement 3.5MPa, and porous is repeatedly answered filling and reached designing requirement not yet.After adopting the present invention's construction, reach designing requirement on inspection.
Embodiment 2: the present invention is applied to the situation that engineering curtain grouting district is in strong corrosion district: this situation solution-cavity filling thing is based on sand and yellow mud, because trial zone scope is less, single hole process is carried out when running into solution cavity, adopt layering high pressure douche from top to bottom, namely creep into solution cavity, segment length with can pore-forming for principle, then high pressure washing (Stress control is at 4 ~ 7MPa) is carried out, rinse and be in the milk (based on grout injection again after returning clear water to aperture, injection rate is large and can mix the Admixtures such as water glass in proportion after having poured into a certain amount of slurries, Reperfu-sion cement paste, at the end of cement injection-water glass slurries), wait after reaching limit standard to coagulate (treating that the solidifying time is generally 24h ~ 72h), segment length is shortened during cleaning bottom of hole, the hole depth of last time when solidifying can not be punched, and then be in the milk, so repeatedly process, until this section carries out next section of process after reaching designing requirement.After construction terminates, on inspection, above karst cave treatment position construction quality all reaches designing requirement.
Certainly, more than just embody rule example of the present invention, the technical scheme that the present invention also has other embodiment, all employings to be equal to replacement or equivalent transformation to be formed, all drops within protection domain of the presently claimed invention.

Claims (5)

1. a karst high pressure associating douche can paste-making method, it is characterized in that: when the method runs into filling-type Karst cave or corrosion fissure in filling process, by water under high pressure or high-pressure blast, water, charges are gone out the cement paste of rear backfill cement mortar or 0.5:1, after solidifying 24h ~ 72h, take traditional cements grouting method to pour into again.
2. karst according to claim 1 high pressure associating douche can paste-making method, is characterized in that the method comprises the steps:
1) find out that solution cavity grows scale, the character of charges, roof and floor hole depth or elevation by boring or geophysical prospecting method;
2) arrange that the grout hole in Geological Defects location is as flushing hole, these grout holes are after being drilled into the hole depth residing for corresponding solution cavity or corrosion fissure, utilizing in two conventional high-pressure grout pumps or associating presses air compressor machine to carry out high pressure water washing or wind and water combined flushing, charges in solution cavity are gone out from boring, until when aperture backwater is peace and quiet only;
(3) answer cement paste or the cement mortar of quickly stuffing 0.5:1 after having rinsed, and treat solidifying 24h ~ 72h;
(4) reach cleaning bottom of hole after the solidifying time and carry out conventional strengthening grouting, until reach designing requirement.
3. karst according to claim 2 high pressure associating douche can paste-making method, it is characterized in that: step 2) described in two conventional high-pressure grout pumps according to being arranged in parallel, Stress control is at 3 ~ 6MPa, and during hole depth 40m ~ 100m, maximum pressure is no more than 25MPa; Stress control 3 ~ 4 MPa of air compressor machine is pressed in described associating.
4. one kind is applicable to the grouting structure of karst, it is the Geological Defects section (3) for the treatment of karst, this Geological Defects section (3) is positioned at the below of basement rock (1), it is characterized in that: this structure is provided with at least three borings (2), boring (2) is vertically goed deep in basement rock (1), and the bottom of boring (2) is in Geological Defects section (3); In three borings (2), at least two is geomantic omen import (4), and one for rinsing outlet (5).
5. the grouting structure being applicable to karst according to claim 4, is characterized in that: two geomantic omen imports (4) lay respectively at the both sides rinsing outlet (5).
CN201410695167.4A 2014-11-27 2014-11-27 Karst high pressure joint rinses grouting method and its structure Active CN104594370B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105862725A (en) * 2016-03-31 2016-08-17 大连久鼎祥瑞特种工程技术研究院有限公司 Underground construction preliminary grouting waterproof and anti-seepage supporting technology
CN105887886A (en) * 2016-06-16 2016-08-24 中国水利水电第十工程局有限公司 Strong karst development stratum curtain grouting construction method
CN106088094A (en) * 2016-07-31 2016-11-09 中水东北勘测设计研究有限责任公司 High mountain strid Method of Arch Dam Foundation segmentation stage grouting method
CN106498965A (en) * 2016-12-05 2017-03-15 广西大学 A kind of karst area water sealing consolidation construction method

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CN204266221U (en) * 2014-11-27 2015-04-15 中国电建集团贵阳勘测设计研究院有限公司 Be applicable to the grouting structure of karst

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CN101509264A (en) * 2009-03-25 2009-08-19 李旺雷 One-step pore-creating, segmenting high pressure cement grout construction method
WO2013082906A1 (en) * 2011-12-07 2013-06-13 长江勘测规划设计研究有限责任公司 Rock-fill dam deformation control method
CN204266221U (en) * 2014-11-27 2015-04-15 中国电建集团贵阳勘测设计研究院有限公司 Be applicable to the grouting structure of karst

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105862725A (en) * 2016-03-31 2016-08-17 大连久鼎祥瑞特种工程技术研究院有限公司 Underground construction preliminary grouting waterproof and anti-seepage supporting technology
CN105887886A (en) * 2016-06-16 2016-08-24 中国水利水电第十工程局有限公司 Strong karst development stratum curtain grouting construction method
CN105887886B (en) * 2016-06-16 2018-02-27 中国水利水电第十一工程局有限公司 A kind of strong karsts developing area stratum Curtain Grouting Construction method
CN106088094A (en) * 2016-07-31 2016-11-09 中水东北勘测设计研究有限责任公司 High mountain strid Method of Arch Dam Foundation segmentation stage grouting method
CN106498965A (en) * 2016-12-05 2017-03-15 广西大学 A kind of karst area water sealing consolidation construction method

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