CN102704456A - Method for judging leakage of waterproof curtain of foundation pit by using artificial heat source and temperature tracing of underground water - Google Patents
Method for judging leakage of waterproof curtain of foundation pit by using artificial heat source and temperature tracing of underground water Download PDFInfo
- Publication number
- CN102704456A CN102704456A CN2012101772537A CN201210177253A CN102704456A CN 102704456 A CN102704456 A CN 102704456A CN 2012101772537 A CN2012101772537 A CN 2012101772537A CN 201210177253 A CN201210177253 A CN 201210177253A CN 102704456 A CN102704456 A CN 102704456A
- Authority
- CN
- China
- Prior art keywords
- foundation ditch
- temperature
- foundation pit
- underground water
- foundation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention relates to a method for judging leakage of a waterproof curtain of a foundation pit by using an artificial heat source and the temperature tracing of underground water. The method comprises the following specific steps of: 1) performing geological exploration of geotechnical engineering and field survey to determine the relative hydrogeology parameters of a targeted foundation pit, wherein the relative hydrogeology parameters comprise an osmotic coefficient, a thermal coefficient, a water storage coefficient and the like; 2) reasonably arranging observation wells inside and outside the pit by using the original well site to ensure that two sides of the waterproof curtain covering the foundation pit are not leaked; 3) measuring the initial temperature field parameters of drilled holes inside and outside the targeted foundation pit on site to obtain the distribution characteristic, the normal value and the like of the foundation pit; 4) applying the heat source to the drilled hole outside the foundation pit to ensure that the temperature in the drilled hole outside the foundation pit is raised; and 5) measuring the temperature in the drilled hole inside the foundation pit, analyzing and judging according to the obtained initial temperature field value, reasoning by combining knowledge of thermodynamics, and judging and positioning the possibly leaked points. The method is definite in principle and high in adaptability; under the condition that the original observation well is utilized, the observation well can be increased appropriately; the leakage of the foundation pit is judged by applying the heat source into the drilled hole outside the pit actively; and the temperature field of the underground water of the observation wells is analyzed and judged by combing the knowledge of thermodynamics, so that the double aims of judging and positioning the leakage of the foundation pit can be fulfilled quickly and conveniently.
Description
Technical field
The invention belongs to and be mainly used in municipal engineering, Industrial and Civil Engineering deep foundation pit precipitation field, be specifically related to a kind of method of utilizing artificial heat and the spike of underground water temperature to judge the foundation ditch water stopping curtain seepage.
Background technology
Particularly in the super large ultra-deep foundation pit excavation construction, the foundation ditch water-stop curtain is being brought into play important safety guarantee effect at foundation pit construction.If the foundation ditch water stopping curtain seepage, groundwater table will be grown tall, and construction in the foundation ditch is caused adverse effect, can threaten construction when serious even directly cause foundation ditch to subside.Therefore monitoring of leakage always is the important step of Foundation Pit Construction.Common way is that certain observation boring is set in foundation ditch water-stop curtain both sides, underground water level is compared observation judged whether that seepage takes place.There are following shortcomings and deficiencies in this practice: observation effect is not obvious, and observed result relatively lags behind, thereby falls into a passive position situation, and the foundation ditch safety factor is high inadequately.
Therefore, in the construction of base pit engineering, it is very important to improve water stopping curtain seepage monitoring efficiency and precision.And the thermal field is the natural physical field that is prevalent in the geologic body.The rule that the thermal field distributes is decided by water stream characteristics and conduction of heat rule, is the basis of carrying out the thermal field tracer study.This just provides the physical quantity of another kind of understanding seepage field except that direct mensuration groundwater table for us.
The present invention utilizes original boring as far as possible, through initiatively applying thermal source, improves monitoring efficient greatly.Not only practiced thrift engineering cost, improved the monitoring efficiency and precision, weakened the influence of monitoring, and the utilization thermal field is monitored and had advantages such as cost is low, efficient is high, pollution-free foundation pit construction.
Existing technical literature retrieval is found that the technology of the temperature spike that functional requirement is similar with the present invention mainly is through sniffer or sensor, and the temperature data that utilizes instrument to collect is analyzed and is judged.As Hohai University's beam more, utility model " a kind of is the groundwater velocity and direction sniffer of tracer with the temperature " (patent No.: 201020105886) that proposes of Chen Jiansheng, Chen Liang, Wang Yuming; The patent of invention of the Chen Liang of Hohai University, Li Gang, Wang Yuming, Fu Changjing, Yan Xiaolu " is the system and method for tracer detecting position of dam leakage passage with the temperature " (patent No.: CN101261053A).But these patents are not all considered and are initiatively applied thermal source carries out seepage to the foundation ditch water-stop curtain judgement.
Summary of the invention
To the deficiency and the defective of prior art, technical problem to be solved by this invention is on existing boring basis, and a kind of method of utilizing artificial heat and the spike of underground water temperature to judge the foundation ditch water stopping curtain seepage is provided.
In order to solve the problems of the technologies described above, the method for foundation ditch water stopping curtain seepage is judged in utilize artificial heat and the spike of underground water temperature that the present invention proposes, and concrete steps are following:
(1), on-the-spot geotechnical investigation, hydrogeology prospecting, find out the engineering geology hydrogeological conditions of target foundation ditch, in conjunction with on-the-spot factual survey, confirm the engineering geology parameter (like transmission coefficient, coefficient of thermal conductivity and coefficient of storage etc.) of target foundation ditch;
(2), utilize original well location, make rational planning for and arrange that foundation ditch is outer, observation well in the foundation ditch, guarantee to cover foundation ditch water-stop curtain both sides, do not have and omit;
(3), in the on-site measurement target foundation ditch, the initial temperature field parameter of the outer boring of foundation ditch, draw its distribution characteristics, normal value etc.; The correlation engineering geologic data that geotechnical investigation and hydrogeology prospecting obtain in the integrating step (1) is set up relevant heat conduction model;
(4), utilize heater, apply thermal source to the boring of the foundation ditch outside, the outer temperature of foundation ditch is raise; Because the effect of underflow motion, if there is seepage, then foundation ditch internal drilling temperature raises because of the heat temperature that seepage flow brings.
(5), measure the temperature of foundation ditch drilling on inner side, analyze and judge according to the foundation ditch internal drilling initial temperature Flow Field Numerical that has recorded, carry out reasoning ins conjunction with thermodynamics knowledge, possible breakthrough is judged and is located.
Among the present invention, described field observation well is the routine observation well.
Among the present invention, set up model described in the step (3) according to being classical thermodynamics conduction knowledge, the hydrogeological data and the thermal field data of target foundation ditch.
Among the present invention, heater described in the step (4) adopts artificial heat for initiatively applying, and records the associated temperature field in conjunction with the temperature spike.
Among the present invention, described observation well is the chimney filter observation well, and is arranged on the stratum that the monitoring target zone maybe need be paid close attention to water level.Its position is arranged according to requirement of engineering.
Among the present invention, pass through analysis in the step (5), thereby reach the judgement and the location of foundation ditch water stopping curtain seepage point foundation ditch internal drilling maximum temperature plane and temperature jump point.
This method definite in principle, compliance is strong, can utilize original foundation ditch to observe under the condition of well; Suitably increase observation well; Through initiatively in the outer boring in hole, applying the judgement that thermal source carries out the foundation ditch seepage, simultaneously, observation well underground water temperature field is analyzed and judged through combining thermodynamics knowledge; Reaching and carry out the judgement of foundation ditch seepage and the dual purpose of location quickly and easily, is a kind of economically viable method.
Description of drawings
Fig. 1 is a schematic flow sheet of the present invention.
Fig. 2 is the inside and outside both sides of foundation ditch water-stop curtain observation well distribution maps.Wherein: the GN+ numeral: inboard observation well of table foundation ditch and numbering, GW+ numeral: table foundation ditch outside observation well and numbering.
Fig. 3 is foundation ditch water-stop curtain both sides initial temperature field patterns.Each regional temperature scope is among the figure: A, B, C and D represent the temperature province scope, A 20. 5-21 ℃; B 21. 5-22 ℃; C is below 19.5 ℃; D 19.5-20 ℃.
Fig. 4 is that normal temperature distributes and " needle pattern " abnormal temperature distribution schematic diagram in the boring.
Fig. 5 is that manual work applies foundation ditch water-stop curtain initial temperature field pattern behind the thermal source.Wherein: A, B, C and D represent the temperature province scope, A 20. 5-21 ℃; B 41. 5-42 ℃; C is below 49.5 ℃; D 49.5-50 ℃.
Fig. 6 cheats internal drilling GN2 temperature-depth curve after manual work applies thermal source.
The specific embodiment
Elaborate in the face of embodiments of the invention down, present embodiment provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technical scheme of the present invention.
Embodiment 1: with the test of somewhere foundation ditch breakthrough is example, and concrete application is carried out according to the following steps:
Step 1, on-the-spot geological prospecting: the stratum is divided into 8 layers in target foundation ditch water-stop curtain influence basin, is respectively 1. layer artificial earth fill base plate absolute altitude 2.03m, bed thickness 1.5m; 2.
1Layer silty clay base plate absolute altitude 0.63m, bed thickness 1.4m; 2.
3Layer sandy silt base plate absolute altitude-3.97m, bed thickness 4.6m; 3. layer mud matter silty clay base plate absolute altitude-6.97m, bed thickness 3m; 4. layer mucky soil base plate absolute altitude-12.47m, bed thickness 5.5m; 5.
1-1Layer clay base plate absolute altitude-18.17m, bed thickness 3.2m; 5.
1-tLayer sandy silt base plate absolute altitude-24.97m, bed thickness 9.7m; 5.
2Layer clay silt folder silty clay base plate absolute altitude-48.07m, bed thickness 23.1m.The observation scope layer is for 5.
1-tLayer sandy silt.Because 5.
1-t5. layer sandy silt layer has with the lower edge
2Layer clay silt folder farinose argillic horizon, and bed thickness reaches 23.1m, considers that water specific heat is maximum, can think that this test temperature test is not streamed by the curtain lower end and influenced, influence and mainly receive manual work to apply thermal source.Field trial records transmission coefficient, coefficient of thermal conductivity is respectively 1.76 * 10
-3Cm/s, 0.5W/m.
Step 3; Utilize temperature measurer; Measure the initial temperature field parameter of the inside and outside boring of target foundation ditch; Wherein record the initial temperature field distribution through boring GN1-3, GW1-3, promptly the a-quadrant 20. 5-21 ℃, B zone 21. 5-22 ℃, C zone below 19.5 ℃, the D zone is at 19.5-20 ℃, plots initial temperature field pattern (see figure 3); In conjunction with thermodynamics conduction knowledge, set up the decision criteria (see figure 4).
Step 4 is utilized heater, applies thermal source to foundation ditch outside boring, makes that temperature raises about 30 ℃ outside the foundation ditch hole.
Step 5; Measure the temperature of foundation ditch drilling on inner side; Record the initial temperature field distribution through boring GN1-3, GW1-3; Be the a-quadrant 20. 5-21 ℃, B zone 41. 5-42 ℃, C zone below 49.5 ℃, the D zone is at 49.5-50 ℃, is depicted as the foundation ditch thermal field flat distribution map (see figure 5) after the heating.In conjunction with thermodynamics knowledge, through initial temperature Flow Field Numerical and the decision criteria that records with the front, highest temperature plane and temperature anomaly point are analyzed and judged, breakthrough is judged and the location.
Initial temperature field in the contrast step 3 can be known; After utilizing artificial heat that boring underground water outside cheating is added about 30 degree of heat temperature raising; The underground water temperature that the hole internal drilling records changes to some extent, obviously raises at the B regional temperature, forms maximum temperature plane distribution position in the hole.Analysis is visible, and breakthrough should occur near the hole internal drilling GN2.In conjunction with GN2 temperature-depth curve (see figure 6), can know the position of the breakthrough degree of depth about 20m.
The effect of present embodiment: on the basis of existing precipitation well and observation well, apply thermal source, the foundation ditch water stopping curtain seepage is judged and the location through manual work.
Claims (4)
1. method of utilizing artificial heat and the spike of underground water temperature to judge the foundation ditch water stopping curtain seepage is characterized in that concrete steps are following:
(1), on-the-spot geotechnical investigation, hydrogeology prospecting, find out the engineering geology hydrogeological conditions of target foundation ditch, in conjunction with on-the-spot factual survey, confirm the engineering geology parameter of target foundation ditch;
(2), utilize original well location, make rational planning for and arrange that foundation ditch is outer, observation well in the foundation ditch, guarantee to cover foundation ditch water-stop curtain both sides, do not have and omit;
(3), in the on-site measurement target foundation ditch, the initial temperature field parameter of the outer boring of foundation ditch, draw its distribution characteristics, normal value etc.; The correlation engineering geologic data that geotechnical investigation and hydrogeology prospecting obtain in the integrating step (1) is set up relevant heat conduction model;
(4), utilize heater, apply thermal source to the boring of the foundation ditch outside, the outer temperature of foundation ditch is raise; Because the effect of underflow motion, if there is seepage, then foundation ditch internal drilling temperature raises because of the heat temperature that seepage flow brings;
(5), measure the temperature of foundation ditch drilling on inner side, analyze and judge according to the foundation ditch internal drilling initial temperature Flow Field Numerical that has recorded, carry out reasoning ins conjunction with thermodynamics knowledge, possible breakthrough is judged and is located.
2. the method for utilizing artificial heat and the spike of underground water temperature to judge the foundation ditch water stopping curtain seepage according to claim 1 is characterized in that it is classical thermodynamics conduction knowledge, the hydrogeological data and the thermal field data of target foundation ditch that described model is set up foundation.
3. the method for utilizing artificial heat and the spike of underground water temperature to judge the foundation ditch water stopping curtain seepage according to claim 1 is characterized in that the inside and outside boring in described hole is conventional boring, and utilizes original foundation pit dewatering well and observation well.
4. the method for utilizing artificial heat and the spike of underground water temperature to judge the foundation ditch water stopping curtain seepage according to claim 1; It is characterized in that passing through analysis in the step (5), thereby reach the judgement and the location of foundation ditch water stopping curtain seepage point foundation ditch internal drilling maximum temperature plane and temperature jump point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101772537A CN102704456A (en) | 2012-06-01 | 2012-06-01 | Method for judging leakage of waterproof curtain of foundation pit by using artificial heat source and temperature tracing of underground water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101772537A CN102704456A (en) | 2012-06-01 | 2012-06-01 | Method for judging leakage of waterproof curtain of foundation pit by using artificial heat source and temperature tracing of underground water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102704456A true CN102704456A (en) | 2012-10-03 |
Family
ID=46897488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101772537A Pending CN102704456A (en) | 2012-06-01 | 2012-06-01 | Method for judging leakage of waterproof curtain of foundation pit by using artificial heat source and temperature tracing of underground water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102704456A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308258A (en) * | 2013-04-24 | 2013-09-18 | 河海大学 | Method for detecting leakage passage position of dam by using cold source method |
| CN103953024A (en) * | 2014-05-09 | 2014-07-30 | 中铁四局集团第一工程有限公司 | Method for identifying abnormal data automatically monitored by foundation pit |
| CN106437692A (en) * | 2016-08-23 | 2017-02-22 | 中国电建集团贵阳勘测设计研究院有限公司 | Deep karst leakage passage detection structure and method based on drill rod inner pipe water level |
| CN106644275A (en) * | 2016-12-12 | 2017-05-10 | 中国电建集团贵阳勘测设计研究院有限公司 | Detection method of anti-leakage curtain leakage |
| CN106680175A (en) * | 2016-12-13 | 2017-05-17 | 河海大学 | Outer pipe drawdown double-pipe method for determining hydrogeological parameters of aquitard of inner pipe on site |
| CN110984162A (en) * | 2019-11-07 | 2020-04-10 | 广西建工集团第五建筑工程有限责任公司 | Seepage-proofing and seepage-resisting construction method for foundation pit near river |
| CN112162009A (en) * | 2020-12-02 | 2021-01-01 | 上海建工集团股份有限公司 | Cement-soil wall construction quality detection method based on temperature distribution monitoring |
| CN113006871A (en) * | 2021-02-03 | 2021-06-22 | 淮北矿业股份有限公司 | Dynamic stability monitoring and early warning method for underground deep-buried curtain |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4366829B2 (en) * | 2000-04-26 | 2009-11-18 | 株式会社大林組 | Water shielding structure management system |
| CN101858991A (en) * | 2010-06-12 | 2010-10-13 | 河海大学 | System and method for detecting position of dam leakage passage by using temperature as tracer |
-
2012
- 2012-06-01 CN CN2012101772537A patent/CN102704456A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4366829B2 (en) * | 2000-04-26 | 2009-11-18 | 株式会社大林組 | Water shielding structure management system |
| CN101858991A (en) * | 2010-06-12 | 2010-10-13 | 河海大学 | System and method for detecting position of dam leakage passage by using temperature as tracer |
Non-Patent Citations (2)
| Title |
|---|
| 董海洲等: "利用温度示踪方法探测基坑渗漏", 《岩石力学与工程学报》 * |
| 陈江等: "热脉冲法监测土坝集中渗漏的数值仿真", 《岩石力学与工程学报》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308258A (en) * | 2013-04-24 | 2013-09-18 | 河海大学 | Method for detecting leakage passage position of dam by using cold source method |
| CN103953024A (en) * | 2014-05-09 | 2014-07-30 | 中铁四局集团第一工程有限公司 | Method for identifying abnormal data automatically monitored by foundation pit |
| CN103953024B (en) * | 2014-05-09 | 2015-09-09 | 中铁四局集团第一工程有限公司 | Foundation ditch automatic monitoring disorder data recognition method |
| CN106437692A (en) * | 2016-08-23 | 2017-02-22 | 中国电建集团贵阳勘测设计研究院有限公司 | Deep karst leakage passage detection structure and method based on drill rod inner pipe water level |
| CN106644275A (en) * | 2016-12-12 | 2017-05-10 | 中国电建集团贵阳勘测设计研究院有限公司 | Detection method of anti-leakage curtain leakage |
| CN106680175A (en) * | 2016-12-13 | 2017-05-17 | 河海大学 | Outer pipe drawdown double-pipe method for determining hydrogeological parameters of aquitard of inner pipe on site |
| CN110984162A (en) * | 2019-11-07 | 2020-04-10 | 广西建工集团第五建筑工程有限责任公司 | Seepage-proofing and seepage-resisting construction method for foundation pit near river |
| CN112162009A (en) * | 2020-12-02 | 2021-01-01 | 上海建工集团股份有限公司 | Cement-soil wall construction quality detection method based on temperature distribution monitoring |
| CN112162009B (en) * | 2020-12-02 | 2021-04-02 | 上海建工集团股份有限公司 | Cement-soil wall construction quality detection method based on temperature distribution monitoring |
| CN113006871A (en) * | 2021-02-03 | 2021-06-22 | 淮北矿业股份有限公司 | Dynamic stability monitoring and early warning method for underground deep-buried curtain |
| CN113006871B (en) * | 2021-02-03 | 2024-01-30 | 淮北矿业股份有限公司 | Dynamic stability monitoring and early warning method for underground deep-buried curtain |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102704456A (en) | Method for judging leakage of waterproof curtain of foundation pit by using artificial heat source and temperature tracing of underground water | |
| Silliman et al. | Analysis of time-series measurements of sediment temperature for identification of gaining vs. losing portions of Juday Creek, Indiana | |
| Cheng et al. | Permafrost and groundwater on the Qinghai-Tibet Plateau and in northeast China | |
| Raposo et al. | Quantitative evaluation of hydrogeological impact produced by tunnel construction using water balance models | |
| CN104696010B (en) | Comprehensive treatment method of mine water inrush | |
| CN102937724B (en) | A kind of detection method of stope bottom rock stratum of open coal mine | |
| Berhane et al. | Water leakage investigation of micro-dam reservoirs in Mesozoic sedimentary sequences in Northern Ethiopia | |
| JP2013539535A (en) | Method of detecting gas leak from underground gas storage layer by pressure monitoring and underground gas storage system | |
| Lin et al. | Effectiveness analysis of water-sealing for underground LPG storage | |
| CN105239611A (en) | Method for determining influence of waterproof curtain leakage below foundation pit excavation surface on surroundings | |
| CN102776904A (en) | Method for fast predicting side wall leakage of underground diaphragm wall using infrared thermal fields | |
| Wang et al. | Investigation of the geological and hydrogeological environment with relation to metro system construction in Jinan, China | |
| Weller et al. | Geotechnical and geophysical long-term monitoring at a levee of Red River in Vietnam | |
| CN103363954A (en) | Land subsidence monitoring system | |
| Meng et al. | Research of concrete dam leakage detection based on anomaly current field of reservoir water | |
| CN103308258A (en) | Method for detecting leakage passage position of dam by using cold source method | |
| Jolly et al. | Resolution of electrical imaging of fluid movement in landfills | |
| Jiang et al. | Review of the advanced monitoring technology of groundwater–air pressure (enclosed potentiometric) for karst collapse studies | |
| CN109143381B (en) | A kind of loess high roadbed aquitard detection method | |
| CN105386430A (en) | Method for confirming water head of two sides of waterproof curtain under waterproof curtain effect | |
| Ogilvy et al. | The possibilities of geophysical methods applied for investigating the impact of man on the geological medium | |
| YOKOYAMA et al. | A review of groundwater observation methods for slow-moving landslide | |
| Gaitanaru et al. | Bucharest city urban groundwater monitoring system | |
| Andrade et al. | Tracer an effective tool in detecting canal seepage: case studies from Northern India | |
| Capes et al. | Hydrologic interpretation of seasonally dynamic ambient temperature profiles in sealed bedrock boreholes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121003 |