CN102691318A - Water injection test method for detecting quality of high-groundwater-level diaphragm wall body - Google Patents

Water injection test method for detecting quality of high-groundwater-level diaphragm wall body Download PDF

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Publication number
CN102691318A
CN102691318A CN2012101979829A CN201210197982A CN102691318A CN 102691318 A CN102691318 A CN 102691318A CN 2012101979829 A CN2012101979829 A CN 2012101979829A CN 201210197982 A CN201210197982 A CN 201210197982A CN 102691318 A CN102691318 A CN 102691318A
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CN
China
Prior art keywords
test
water injection
hole
grouting plug
stop
Prior art date
Application number
CN2012101979829A
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Chinese (zh)
Inventor
王运敏
林明
代永新
刁虎
周敏
卢敬标
赵蒙生
赵武鹍
Original Assignee
中钢集团马鞍山矿山研究院有限公司
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Application filed by 中钢集团马鞍山矿山研究院有限公司 filed Critical 中钢集团马鞍山矿山研究院有限公司
Priority to CN2012101979829A priority Critical patent/CN102691318A/en
Publication of CN102691318A publication Critical patent/CN102691318A/en

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Abstract

The invention discloses a water injection test method for detecting quality of a high-groundwater-level diaphragm wall body, which adopts the following technical measures and steps: a test hole position is determined according to design requirements; a hole is drilled at the test hole position, the diameter of the hole is determined according to the size of a stop-grouting plug and not smaller than 75mm; the lower part of a cylindrical guide pipe with a thin lower part and a thick upper part is inserted in a round hole of the stop-grouting plug and penetrates through the stop-grouting plug; the stop-grouting plug is placed at a drilled hole of a high-pressure grouting wall and positioned; the lower end of the guide pipe is positioned at a deep part of the drilled hole under the stop-grouting plug, and the upper end of the guide pipe is positioned above the ground surface; the stop-grouting plug is pressurized and expanded to cut off hydraulic connection between a test section and the upper part of the drilled hole; after the water level in the guide pipe is stable, the water injection test begins; and data statistic and measurement are carried out to obtain a test result. By use of the water injection test method, the interference of underground water outside the diaphragm wall body to the detection result can be completely eliminated, so that accurate detection data is obtained. The water injection test method is implemented completely according to the specification requirements of the water injection test and has the advantages of being simple, convenient and feasible, and reliable in result. The water injection test method is applicable to detection of engineering quality of the high-pressure jet grouting underground diaphragm wall body at any position and depth.

Description

A kind of water injection test method that detects phreatic high cut-off wall quality
Technical field
The present invention relates to detect the test method of the anti-seepage effect of the underground seepage proof curtain of high-pressure rotary-spray, be applicable to adopt under the various water level conditions water injection test accurately, the anti-seepage effect of reliable detection impervious wall.
Background technology
The high-pressure rotary-spray technology is applicable to antiseepage, the reinforcing of all kinds of soil layers.When adopting high spray technique to do underground impervious wall, need after becoming wall, to detect the antiseepage quality of body of wall, and make quantitative assessment.Wherein water injection test is a kind of detection method of code requirement.
Though the underground impervious wall that the decision of the equipment characteristic of high-pressure spray process uses this technology to form can become wall at underground arbitrary desired location, still having an appointment far from the face of land in its top can't form impervious wall about 1m.When adopting the boring method water injection test to be detected as the wall quality, can have two kinds of situation to produce: the one, body of wall is buried underground, and a segment distance is arranged apart from the face of land; The 2nd, the body of wall top is very near far from the face of land.Because the leakage proof wall infiltration capacity that forms is little, general K<10 -5Cm/s, when then taking place during on-test behind the stable level in the hole by the water injection test standard operation: water injection rate can't accurately measure when (1) test section was dark; Wall top can be infiltrated in the hole or the water in the hole is overflowed from the soil body so that the soil body of upper part is moisture when (2) the test section buried depth was more shallow, caused result of the test inaccurate.
For addressing this problem, obtain experimental data accurately, the present invention improves water-filling method when making an experiment according to the water injection test standard fully, and effect is fine.
Summary of the invention
The object of the invention is exactly to the above-mentioned defective that exists in the prior art, and a kind of water injection test method that detects phreatic high cut-off wall quality is provided.Water injection technology when this method makes an experiment according to the water injection test standard fully improves, and test section all can obtain reliably in underground deep or at the near surface place, experimental data accurately no matter make.
For realizing above-mentioned purpose of the present invention, a kind of water injection test method that detects phreatic high cut-off wall quality of the present invention realizes through following technical scheme.
The present invention is a kind of improvement when the underground impervious wall water injection test.Technological measure and step that a kind of water injection test method that detects phreatic high cut-off wall quality of the present invention adopts are:
(1) detects requirement, position, confirmed test hole according to standard.
(2) on the test hole position, hole, the aperture is confirmed according to the size of stop grouting plug, but is not less than 75mm.
(3) the bottom bottom is thin, cylindrical conduit that top is thick is inserted in the circular hole of stop grouting plug and is passed stop grouting plug; Stop grouting plug is put the drill hole in the paramount spray body of wall, and be located; The lower end of said conduit is positioned at the boring deep under the stop grouting plug, and the upper end of conduit is positioned on the face of land.
(4) stop grouting plug adds the hydraulic connection on compression swelling blocking test section and boring top;
(5) water injection test begins behind the interior stable level of conduit;
(6) metric data is added up in safety model operation one by one, draws result of the test.
The present invention is through after holing on the leakage proof wall; Utilize the stop grouting plug blocking-up boring top of curtain-grouting to pass getting in touch of soil body section and test section; Simultaneously one section PVC conduit is passed stop grouting plug and cause the face of land, make water level in water filling, the hole, all table handlings on ground of water yield observation, difficulty had both simplified the operation; It is moisture to supply or effusion in holing to have got rid of the leakage proof wall top soil body simultaneously, thereby has improved the degree of accuracy that measures.
After a kind of water injection test method that detects phreatic high cut-off wall quality of the present invention adopts above technical scheme, have following effect:
The accurate metering of (1) convenient test middle water level observation, each water injection rate;
(2) get rid of the moisture interference that water after supply in holing or the water filling is overflowed from the soil body of the leakage proof wall top soil body, improve test accuracy;
(3) test method does not change the operation requirement of water injection test standard, but simple and easy to operate, and the gained data accurately, reliably.
Description of drawings
Fig. 1 is a kind of vertical arrangement diagram that detects the water injection test method of phreatic high cut-off wall quality of the present invention.
Fig. 2 is of the present invention a kind of process chart that detects the water injection test method of phreatic high cut-off wall quality.
The specific embodiment
For further describing the present invention, a kind of water injection test method that detects phreatic high cut-off wall quality of the present invention is done further explain below in conjunction with accompanying drawing and embodiment.
By vertical arrangement diagram of the water injection test method that detects phreatic high cut-off wall quality for the present invention is a kind of shown in Figure 1 and combine Fig. 2 to find out, technological measure and step that the present invention adopts are:
(1) detects requirement according to standard, specify the test hole position, confirm drilling depth by project supervision.
(2) on the test hole position, hole, the aperture is confirmed according to the size of stop grouting plug, but is not less than 75mm.
(3) the bottom bottom is thin, PVC conduit that top is thick is inserted in the circular hole of stop grouting plug and is passed stop grouting plug, the drill hole of stop grouting plug being put paramount spray body of wall.
(4) stop grouting plug is located.
(5) connect fairlead to the face of land: soil layer is passed on the top of conduit, and its upper end is positioned on the face of land.
(6) stop grouting plug adds the hydraulic connection on compression swelling blocking test section and boring top.
(7) water injection test begins behind the interior stable level of conduit.
(8) press code requirement operation, test statistics metric data one by one, the slippage according to water in the conduit draws result of the test.
Under the test situation, the conduit overhead height>the water injection test height of water level>face of land height>the groundwater table height>the impervious wall heights of roofs.
The inventive method is blocked detection segment and outside hydraulic connection fully, and result of the test is truly represented the level of interpenetration of leakage proof wall self, and experimental data is accurate.The inventive method is positioned over stop grouting plug in the boring in the high spray body of wall; Carry out at water filling fairlead top in the hole; Be easy to observe, each water injection rate metering accurately, error is little between the experimental data of each time, final result is reliable, the experimental data in each hole, porous test back is added up and can be made accurate judge to the construction quality of this project.

Claims (1)

1. water injection test method that detects phreatic high cut-off wall quality is characterized in that adopting following technological measure and step:
(1) according to designing requirement, position, confirmed test hole;
(2) on the test hole position, hole, the aperture is confirmed according to the size of stop grouting plug, but is not less than 75mm;
(3) the bottom bottom is thin, cylindrical conduit that top is thick is inserted in the circular hole of stop grouting plug and is passed stop grouting plug; Stop grouting plug is put the drill hole in the paramount spray body of wall, and be located; The lower end of said conduit is positioned at the boring deep under the stop grouting plug, and the upper end of conduit is positioned on the face of land;
(4) stop grouting plug adds the hydraulic connection on compression swelling blocking test section and boring top;
(5) water injection test begins behind the interior stable level of conduit;
(6) metric data is added up in safety model operation one by one, draws result of the test.
CN2012101979829A 2012-06-15 2012-06-15 Water injection test method for detecting quality of high-groundwater-level diaphragm wall body CN102691318A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012101979829A CN102691318A (en) 2012-06-15 2012-06-15 Water injection test method for detecting quality of high-groundwater-level diaphragm wall body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012101979829A CN102691318A (en) 2012-06-15 2012-06-15 Water injection test method for detecting quality of high-groundwater-level diaphragm wall body

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Publication Number Publication Date
CN102691318A true CN102691318A (en) 2012-09-26

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106320397A (en) * 2016-08-28 2017-01-11 神翼航空器科技(天津)有限公司 Advanced prediction and renovation method for foundation pit seepage
CN109632577A (en) * 2019-02-20 2019-04-16 自然资源部第海洋研究所 A kind of cut-pff wall defective locations detection device and detection method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101660309A (en) * 2009-08-07 2010-03-03 赵延龙 Multi-drill high-pressure jet agitation based anti-seepage reinforcing equipment and construction method thereof
DE102007010856B4 (en) * 2007-03-01 2010-12-23 Gts Grube Teutschenthal Sicherungs Gmbh & Co. Kg Method and device for proof of tightness
CN102747722A (en) * 2012-07-27 2012-10-24 天津市勘察院 Underground continuous wall joint close grouting and covering construction method and expansion rubber plug

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Publication number Priority date Publication date Assignee Title
DE102007010856B4 (en) * 2007-03-01 2010-12-23 Gts Grube Teutschenthal Sicherungs Gmbh & Co. Kg Method and device for proof of tightness
CN101660309A (en) * 2009-08-07 2010-03-03 赵延龙 Multi-drill high-pressure jet agitation based anti-seepage reinforcing equipment and construction method thereof
CN102747722A (en) * 2012-07-27 2012-10-24 天津市勘察院 Underground continuous wall joint close grouting and covering construction method and expansion rubber plug

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陈武: "关于防渗墙渗透系数测定的总结", 《科技创新导报》, no. 9, 31 March 2010 (2010-03-31) *
鞠占斌等人: "《水利水电工程注水试验规程》", 26 November 2007, article "水利水电工程注水试验规程" *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106320397A (en) * 2016-08-28 2017-01-11 神翼航空器科技(天津)有限公司 Advanced prediction and renovation method for foundation pit seepage
CN106320397B (en) * 2016-08-28 2018-05-29 神翼航空器科技(天津)有限公司 The advanced prediction of Leakage of Foundation Pit and advanced regulation method
CN109632577A (en) * 2019-02-20 2019-04-16 自然资源部第海洋研究所 A kind of cut-pff wall defective locations detection device and detection method

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Application publication date: 20120926