CN201401163Y - System monitoring temperature field of frost wall by electrical resistivity - Google Patents
System monitoring temperature field of frost wall by electrical resistivity Download PDFInfo
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- CN201401163Y CN201401163Y CN2009201433758U CN200920143375U CN201401163Y CN 201401163 Y CN201401163 Y CN 201401163Y CN 2009201433758 U CN2009201433758 U CN 2009201433758U CN 200920143375 U CN200920143375 U CN 200920143375U CN 201401163 Y CN201401163 Y CN 201401163Y
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- temperature field
- monitoring
- frost wall
- electrical resistivity
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Abstract
The utility model discloses a system monitoring the temperature field of a frost wall by electrical resistivity, which is characterized in that: a circle or a plurality of circles of monitoring holes(4 to 8) are drilled on the vertical shaft with the frost wall or the circumference of a tunnel. The depth of the monitoring holes is 150-700m and the diameter thereof is 133-159mm; multi-core cableswith a plurality of electrodes are arranged in each monitoring hole. The electrode spacing is 1.8-2.2m. The external end of the multi-core cable is connected on an electrical resistivity meter. The utility model has the advantages of large data collection capacity and low fees, thus improving information monitoring level of the temperature field of frost wall, effectively probing the abnormal phenomena of pipe breaking, interstices and the like during frosting and guaranteeing the safe construction during frosting.
Description
Technical field:
The utility model is a kind of monitoring system, specifically is the system of monitoring freezing wall temperature field by resistivity.
Background technology:
The artificial freezing technology in stratum (artificial ground freezing, AGF) be the method for utilizing artificial cooling, the temperature that reduces the soil body makes water bearing ground formation freeze body, thereby stable and fluid-tight frozen soils structure have been constructed in the periphery, place that expection will be excavated, safeguarding that to reach excavation face surrounding soil is stable, resist the ambient water soil pressure, prevent the purpose that underground water is invaded, is a kind of special Construction of Civil Engineering technology.
Aspect the special sinking technique in deep alluvium, at present, the national freeze-wellboring degree of depth such as Germany, Britain, Poland, Canada, Belgium are all above 600m, well in infectious coryza woods colliery of the darkest Poland of the depth of frost penetration in the colliery, and the depth of frost penetration reaches 725m.Along with the day by day increase of China to the coal energy demand, the new well construction in colliery is progressively extended to the deep, and it is increasing that pitshaft passes through the thickness of showing the soil layer, Huainan Ding Ji mine table scholar layer thickness 530.5m, Gu Bei ore deposit 463m, Ban Ji ore deposit 580m, exhibition ditch ore deposit 620m; Mining area, Woyang, Huaibei thickness of surface soil is more than 410m; Guo Tun colliery, Heze is major and minor, 3 pit shaft topsoil of wind degree of depth is respectively 587.4m, 583.1m and 563.6m, the depth of frost penetration 702.The freeze-wellboring technology becomes the main special construction method by unstable alluvium and subterrane weathered rock formation thereof.
Along with the development of urban construction, artificial stratum freezing process has obtained using widely in China's subway, foundation ditch, municipal isolith geotechnique journey.Near the dark construction of tunnel of defeated loud diameter in the subway construction engineering of Spain Valencia, Milwaukee city, the gloomy state of University of Wisconsin-Madison, the railway terminal, German Dusseldorf urban centre Metro Tunnel, the underground transmission construction of tunnel of Japan Nagoya market, St. Petersburg, Russia subway engineering, Munich, Germany subway engineering etc. have all successfully been used artificial freezing process.Since the nineties in 20th century, China successively Beijing Metro " multiple-eight " south, the big northern kiln car of line station tunnel construction sections, No. 2 line Central Park Station of Shanghai Underground to poplar high way station by-pass, Tianjin Underground cross Ziyahe River section, Shanghai rail transit Yangpu line (M8 line) Quyang way station-football station, Hongkou running tunnel service channel, No. three line Milky Way of Guangzhou track traffic passenger station and turn back in the engineering such as line, successful Application the horizontal frozen reinforcing technique.
The key of construction freezing method is the frost wall problem, and the intensity of frost wall and stability depend primarily on the feature of freezing wall temperature field, comprises the distribution form of thermal field.In the different phase of freezing, the Characteristics of Temperature Field of different soil is different.In construction,, cause heavy economic losses sometimes because accidents such as fracture of freezing pipe, works pressure break take place frost wall bulk strength deficiency.Therefore, the thermal field in the actual engineering being monitored in real time is the main contents of freezing process information-aided construction.In freezing engineering, generally arrange that at frigo the medial and lateral in circle footpath are provided with 2～4 thermometer holes, temperature according to each point for measuring temperature in the thermometer hole develops the development of grasping frost wall, usually temperature measurement data substitution analytic theory formula is calculated the thickness of frost wall.But, in practice, only there is the temperature measurement data of thermometer hole still can not solve engineering problem, because the data volume of thermometer hole actual measurement is less, only reflected the local circumstance that pit shaft freezes, also do not reach the whole technical requirements of grasping the development of pit shaft frost wall, when frost wall occurs not handing over the circle problem, judge with the data of thermometer hole with regard to being difficult to.And there are drawbacks such as the data acquisition amount is few, expense height in traditional freezing wall temperature field monitoring.
The utility model content:
The utility model purpose is exactly in order to remedy the defective of prior art, a kind of system of monitoring freezing wall temperature field by resistivity to be provided.It has improved the level of freezing wall temperature field information-based monitoring effectively.
The utility model is achieved through the following technical solutions:
The system of monitoring freezing wall temperature field by resistivity, it is characterized in that: 4～8 in the detection hole that is arranged in a circle or multi-turn the shaft of vertical well that forms frost wall or border, tunnel jumping through rings shape, the degree of depth that detects the hole is 150～700m, and the detection bore dia is 133～159mm; Place the multicore cable that has some electrodes in each detects the hole, the electrode spacing of described electrode is 1.8～2.2m, and described multicore cable outer end is connected on the resistivity meter.
Before the utility model was implemented, at first took a sample in the stratum that shaft of vertical well or tunnel are passed, and tests physical parameters such as each soil specimen moisture content, density; Keeping adopting the electric conductivity (electricalresistivity of (30～-30 ℃) soil sample under the resistivity method test determination different temperatures under the constant situation of soil sample physical parameter
s), draw t-ρ
sCurve is obtained regression equation; Adopt the dc resistivity scene that frost wall is carried out the resistivity data collection, according to the t-ρ of each soil sample
sEquation and frozen ground bore hole columnar section are drawn the frost wall isollaothermic chart, thereby draw the developmental state of frost wall.
In addition,, accelerated the speed of on-site data gathering greatly, made resistivity method timely monitor frost wall owing to the appearance of parallel network electrical survey system.
The utility model has the advantages that:
The utility model data acquisition amount is big, expense is low, has improved the level of freezing wall temperature field information-based monitoring greatly, can survey disconnected pipe in the freezing process effectively, not hand over anomalies such as circle, for the freezing process safe construction provides safeguard.And have practicality widely, be applied to adopt the coal mine shaft lining of the artificial freezing technology construction in stratum and the freezing wall temperature field monitoring of Metro Tunnel.
Description of drawings:
Fig. 1 is the plane of arrangement figure of exploration hole in the utility model.
Fig. 2 is a layout chart of the present utility model.
The specific embodiment:
The system of monitoring freezing wall temperature field by resistivity, be arranged in the detection hole 2 of a circle or multi-turn the shaft of vertical well that forms frost wall 5 or tunnel 1 border jumping through rings shape, detecting hole 2 is 4-8, and the degree of depth that detects hole 2 is 150～700m, and detecting hole 2 diameters is 133～159mm; Place the multicore cable 3 that has some electrodes in each detects hole 2, the electrode spacing of described electrode is 1.8～2.2m, and multicore cable 3 outer ends are connected on the resistivity meter 4.
Claims (1)
1, the system of monitoring freezing wall temperature field by resistivity, it is characterized in that: 4～8 in the detection hole that is arranged in a circle or multi-turn the shaft of vertical well that forms frost wall or border, tunnel jumping through rings shape, the degree of depth that detects the hole is 150～700m, and the detection bore dia is 133～159mm; Place the multicore cable that has some electrodes in each detects the hole, the electrode spacing of described electrode is 1.8～2.2m, and described multicore cable outer end is connected on the resistivity meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201433758U CN201401163Y (en) | 2009-03-17 | 2009-03-17 | System monitoring temperature field of frost wall by electrical resistivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201433758U CN201401163Y (en) | 2009-03-17 | 2009-03-17 | System monitoring temperature field of frost wall by electrical resistivity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201401163Y true CN201401163Y (en) | 2010-02-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2009201433758U Expired - Fee Related CN201401163Y (en) | 2009-03-17 | 2009-03-17 | System monitoring temperature field of frost wall by electrical resistivity |
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| CN (1) | CN201401163Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287190A (en) * | 2011-09-08 | 2011-12-21 | 同济大学 | Method for freezing high-gradient nonhomogeneous freezing wall |
| CN103115935A (en) * | 2013-01-25 | 2013-05-22 | 安徽理工大学 | Method for monitoring thawing process of frozen wall through optical fiber temperature sensing |
| CN107290981A (en) * | 2016-03-31 | 2017-10-24 | 吕琳 | It is a kind of be used for Tunnel Engineering construction freezing method when dog collar control system |
| CN116608009A (en) * | 2023-05-31 | 2023-08-18 | 安徽建筑大学 | Method for monitoring layering freezing and grouting reinforcement effects in real time |
-
2009
- 2009-03-17 CN CN2009201433758U patent/CN201401163Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102287190A (en) * | 2011-09-08 | 2011-12-21 | 同济大学 | Method for freezing high-gradient nonhomogeneous freezing wall |
| CN103115935A (en) * | 2013-01-25 | 2013-05-22 | 安徽理工大学 | Method for monitoring thawing process of frozen wall through optical fiber temperature sensing |
| CN107290981A (en) * | 2016-03-31 | 2017-10-24 | 吕琳 | It is a kind of be used for Tunnel Engineering construction freezing method when dog collar control system |
| CN107290981B (en) * | 2016-03-31 | 2024-04-05 | 煤炭工业合肥设计研究院有限责任公司 | Freezing ring control system used in tunnel engineering freezing method construction |
| CN116608009A (en) * | 2023-05-31 | 2023-08-18 | 安徽建筑大学 | Method for monitoring layering freezing and grouting reinforcement effects in real time |
| CN116608009B (en) * | 2023-05-31 | 2024-04-09 | 安徽建筑大学 | Method for monitoring layering freezing and grouting reinforcement effects in real time |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100210 Termination date: 20110317 |