CN203572746U - Device for monitoring leakage of face rockfill dam on deep cover layer - Google Patents
Device for monitoring leakage of face rockfill dam on deep cover layer Download PDFInfo
- Publication number
- CN203572746U CN203572746U CN201320613940.9U CN201320613940U CN203572746U CN 203572746 U CN203572746 U CN 203572746U CN 201320613940 U CN201320613940 U CN 201320613940U CN 203572746 U CN203572746 U CN 203572746U
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- monitoring
- pipe
- holes
- overlayer
- water stop
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 73
- 239000011435 rock Substances 0.000 claims abstract description 10
- 239000000523 sample Substances 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 238000012806 monitoring device Methods 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 4
- 238000007373 indentation Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000008595 infiltration Effects 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 3
- 239000000700 radioactive tracer Substances 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Abstract
The utility model relates to a device for monitoring the leakage of a face rockfill dam on a deep cover layer. The device comprises a diaphragm wall, monitoring holes, monitoring pipes and a measuring weir. The device is characterized in that the diaphragm wall is located on the cover layer, and the two ends of the diaphragm wall are fixed on bed rocks of two shores or weakly-permeable boundaries; the measuring weir is arranged on the wall top of the diaphragm wall, and the measuring weir is a concave gap; one monitoring hole is formed every 5 to 15 meters in the central axis direction of the diaphragm wall, and the monitoring holes are vertical holes which extend into the cover layer; the monitoring pipes are arranged in the monitoring holes, sieve holes are formed in the pipe walls of the monitoring pipes, a plurality of sieve holes are formed in the monitoring pipes in the direction of the long axes of the pipes at intervals, and conductance probes are distributed in all the sieve holes in different depths. The device adopting the arrangement is simple in structure and easy to implement, and as compared with a full-truncation scheme, investment is small.
Description
Technical field
The utility model relates to the face dam leakage monitoring device on the monitoring of deep covering layer leakage field, particularly deep covering layer.
Background technology
Rock seepage flow monitoring mode on deep covering layer is more, the more shallow general employing of overlayer is entirely blocked overlayer and is arranged weir, when closed area, downstream is nearer, consider to arrange weir in conjunction with closed region, and suspension type water stop is set in conjunction with arranging weir (having free flow behind dam), or establish piezometric tube in dam underwater bed, by monitoring groundwater's gradient, utilize Darcy's law estimation leakage.
When overlayer deep (> 20m), entirely to block overlayer cost larger, nearly ten million yuan at least of investment, tens million of units at most, piezometric tube measurement underground water table is set in riverbed if do not blocked overlayer and utilizes Darcy formula estimation leakage, due to the unevenness of overlayer ground, its infiltration coefficient is little differs several times, greatly differs decades of times, therefore quantify seepage value depends on the accurate test of overlayer infiltration coefficient, and higher or inapplicable while having free flow in the level of tail water.
Utility model content
The purpose of this utility model is to provide the face dam leakage monitoring device on a kind of deep covering layer, and this arrangement is simple, easy to implement, invests little with respect to entirely blocking scheme.
The technical scheme that the utility model solves its technical matters employing is: the face dam leakage monitoring device on deep covering layer, comprise water stop, monitoring holes, monitoring pipe and weir, it is characterized in that: water stop is positioned on overlayer, water stop two ends and two sides basement rock or weak permeable boundary are fixed, the place, wall top of water stop is furnished with weir, weir is concave indentation, central axial direction along water stop is arranged a monitoring holes every 5m～15m, monitoring holes is that vertical hole extends in overlayer, in monitoring holes, be provided with monitoring pipe, the tube wall place of monitoring pipe is furnished with sieve aperture, monitoring pipe has multiple sieve apertures along pipe range axis direction interval, in the sieve aperture of different depth, be all furnished with electricity and lead probe.
The described high 3m～7m of water stop wall, wall thickness 0.6m～1.2m.
The monitoring pipe of arranging in described monitoring holes is water gas pipe or stainless-steel tube or pvc pipe.
The diameter of described monitoring pipe is φ 75mm～φ 125mm, and monitoring pipe has along tube wall the sieve aperture that aperture is φ 10mm～φ 20mm every 2m～5m along pipe range axis direction.
Described sieve aperture is quincunx on monitoring pipe surface and is evenly arranged, and sieve aperture pitch-row and array pitch are 10mm～20mm, 5～10 rows.
The vertical hole of described monitoring holes extends in tectal 60m depth range, when the overlayer degree of depth exceedes 60m, monitoring holes extends to tectal 60m depth location place, and during the not enough 60m of the overlayer degree of depth, basement rock or the weak permeable boundary place of overlayer below goed deep in the bottom, hole of monitoring holes.
The beneficial effects of the utility model are, due to the weir by water stop and intratectal monitoring holes, seepage flow is divided into free flow and undercurrent, and detect respectively the infiltration capacity of free flow flow and undercurrent, finally draw total leakage, free flow adopts weir monitoring accuracy high, to accurately measured value of fluctuations in discharge, undercurrent adopts flow section area and seepage velocity to calculate, and disturbs less.
Accompanying drawing explanation
Below in conjunction with embodiment, the utility model is further illustrated.
Fig. 1 is the structural representation that monitoring pipe is inserted basement rock;
Fig. 2 is the structural representation that monitoring pipe is inserted overlayer certain depth;
Fig. 3 is that figure is shown in the signal of sieve aperture layout;
In figure: 1, water stop; 2, monitoring holes; 3, monitoring pipe; 4, weir; 5, overlayer; 6, basement rock or weak permeable boundary; 7, sieve aperture.
Embodiment
Embodiment 1
As shown in Figure 1, face dam leakage monitoring device on this deep covering layer, comprise water stop 1, monitoring holes 2, monitoring pipe 3 and weir 4, wherein water stop 1 is positioned on overlayer 5, high 3m～the 7m of water stop 1 wall, wall thickness 0.6m～1.2m, water stop 1 two ends and two sides basement rock or weak permeable boundary 6 are fixing, the place, wall top of water stop 1 is furnished with weir 4, weir 4 is concave indentation, central axial direction along water stop 1 is arranged a monitoring holes 2 every 5m～15m, monitoring holes 2 extends in overlayer 5 for vertical hole, in monitoring holes 2, be provided with monitoring pipe 3, the tube wall place of monitoring pipe 3 is furnished with sieve aperture 7, monitoring pipe 3 has multiple sieve apertures 7 along pipe range axis direction interval, the interior electricity that is all furnished with of sieve aperture 7 of different depth is led probe.
The detection method of the face dam leakage monitoring device on this deep covering layer comprises the following steps:
1) first Riverbed is dug to 2m～5m 5 times, then build the concrete cutoff wall 1 of bar shaped, water stop 1 is divided into free flow and undercurrent by seepage flow;
2) free flow in seepage flow, by the weir 4 indentation, there processes on water stop 1, carries out precise monitoring to free flow flow;
3) undercurrent in seepage flow utilizes the monitoring holes 2 extending in overlayer 5 on water stop 1 to measure;
4) by the free flow and the undercurrent that record, finally obtain leakage total in overlayer.
Wherein the measuring method of the undercurrent in seepage flow comprises step:
1) first electricity is led to sieve aperture 7 places of Probe arrangement at monitoring pipe 3 different depths;
2) artificial tracer is evenly dropped in the interior underground water of monitoring pipe 3, the water that the tracer concentration in underground water is flow through sieve aperture 7 dilutes again;
3) speed of diluting according to tracer concentration and the relation of groundwater seepage flow velocity are obtained the seepage velocity at corresponding sieve aperture 7 places;
4) gather the interior sieve aperture 7 place's velocity flow profile of all monitoring pipe 3, then by seepage velocity distribution applications calculus, finally calculate the undercurrent seepage flow at measuring section place.
Wherein by the seepage velocity calculus of calculating undercurrent seepage flow that distributes, according to the flow velocity at single sieve aperture 7 places and aperture, calculate the undercurrent seepage flow at these sieve aperture 7 places, then according to the distribution situation of sieve aperture 7, draw the overall undercurrent seepage flow of section part.
By the free flow and the undercurrent that record, finally obtain leakage total in overlayer.
The construction of the monitoring holes 2 in above-described embodiment is to follow pipe bit to enter by percussive rotary drilling rig, the monitoring pipe 3 of monitoring holes 2 interior layouts is water gas pipe or stainless-steel tube or pvc pipe, the diameter of monitoring pipe 3 is φ 75mm～φ 125mm, monitoring pipe 3 has along tube wall the sieve aperture 7 that aperture is φ 10mm～φ 20mm every 2m～5m along pipe range axis direction, sieve aperture 7 is quincunx on monitoring pipe 3 surfaces and is evenly arranged, the array pitch that is sieve aperture equals pitch-row, each round is arranged in the centre position of a round, sieve aperture pitch-row and array pitch are 10mm～20mm, 5～10 rows.Quincunx sieve aperture is arranged and is illustrated to see Fig. 3.
The vertical hole of monitoring holes 2 in embodiment 1 extends in the 60m depth range of overlayer 5, when overlayer 5 degree of depth exceed 60m, monitoring holes 2 extends to the 60m depth location place of overlayer 5, see Fig. 2, during the not enough 60m of overlayer 5 degree of depth, basement rock or weak permeable boundary 6 places of overlayer 5 belows are goed deep in the bottom, hole of monitoring holes 2, see Fig. 1.
The parts that the present embodiment does not describe in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not narration one by one.
Claims (6)
1. the face dam leakage monitoring device on deep covering layer, comprise water stop (1), monitoring holes (2), monitoring pipe (3) and weir (4), it is characterized in that: water stop (1) is positioned on overlayer (5), water stop (1) two ends and two sides basement rock or weak permeable boundary (6) are fixing, the place, wall top of water stop (1) is furnished with weir (4), weir (4) is concave indentation, central axial direction along water stop (1) is arranged a monitoring holes (2) every 5m～15m, monitoring holes (2) extends in overlayer (5) for vertical hole, in monitoring holes (2), be provided with monitoring pipe (3), the tube wall place of monitoring pipe (3) is furnished with sieve aperture (7), monitoring pipe (3) has multiple sieve apertures (7) along pipe range axis direction interval, in the sieve aperture (7) of different depth, be all furnished with electricity and lead probe.
2. the face dam leakage monitoring device on deep covering layer according to claim 1, is characterized in that: the described high 3m～7m of water stop (1) wall, wall thickness 0.6m～1.2m.
3. the face dam leakage monitoring device on deep covering layer according to claim 1, is characterized in that: the monitoring pipe (3) of arranging in described monitoring holes (2) is water gas pipe or stainless-steel tube or pvc pipe.
4. the face dam leakage monitoring device on deep covering layer according to claim 1, it is characterized in that: the diameter of described monitoring pipe (3) is φ 75mm～φ 125mm, monitoring pipe (3) has along tube wall the sieve aperture (7) that aperture is φ 10mm～φ 20mm every 2m～5m along pipe range axis direction.
5. the face dam leakage monitoring device on deep covering layer according to claim 1, is characterized in that: described sieve aperture (7) is quincunx on monitoring pipe (3) surface and is evenly arranged, and sieve aperture pitch-row and array pitch are 10mm～20mm, 5～10 rows.
6. the face dam leakage monitoring device on deep covering layer according to claim 1, it is characterized in that: described monitoring holes (2) vertically extends in the 60m depth range of overlayer (5) in hole, when overlayer (5) degree of depth exceedes 60m, monitoring holes (2) extends to the 60m depth location place of overlayer (5), during the not enough 60m of overlayer (5) degree of depth, the bottom, hole of monitoring holes (2) is goed deep into basement rock or the weak permeable boundary (6) of overlayer (5) below and is located.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320613940.9U CN203572746U (en) | 2013-10-08 | 2013-10-08 | Device for monitoring leakage of face rockfill dam on deep cover layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320613940.9U CN203572746U (en) | 2013-10-08 | 2013-10-08 | Device for monitoring leakage of face rockfill dam on deep cover layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203572746U true CN203572746U (en) | 2014-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320613940.9U Expired - Lifetime CN203572746U (en) | 2013-10-08 | 2013-10-08 | Device for monitoring leakage of face rockfill dam on deep cover layer |
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| CN (1) | CN203572746U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471978A (en) * | 2013-10-08 | 2013-12-25 | 中国水电顾问集团西北勘测设计研究院 | Face plate dam leakage monitor structure on deep covering layer |
| CN113514204A (en) * | 2021-04-07 | 2021-10-19 | 常州大学 | Depleted oil reservoir type gas storage contains crack cap leakproofness test device |
-
2013
- 2013-10-08 CN CN201320613940.9U patent/CN203572746U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103471978A (en) * | 2013-10-08 | 2013-12-25 | 中国水电顾问集团西北勘测设计研究院 | Face plate dam leakage monitor structure on deep covering layer |
| CN113514204A (en) * | 2021-04-07 | 2021-10-19 | 常州大学 | Depleted oil reservoir type gas storage contains crack cap leakproofness test device |
| CN113514204B (en) * | 2021-04-07 | 2023-12-08 | 常州大学 | Sealing performance test device for crack-containing cover layer of exhausted oil reservoir type gas storage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA ELECTRIC POWER CONSTRUCTION GROUP NORTHWEST Free format text: FORMER NAME: HYDROCHINA XIBEI ENGINEERING CORPORATION Owner name: HYDROCHINA XIBEI ENGINEERING CORPORATION Free format text: FORMER NAME: NORTHWEST HYDROELECTRIC INVESTIGATION + DESIGN INSTITUTE OF CHINA HYDROPOWER ENGINEERING CONSULTING |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 710065 Shaanxi Province, Xi'an City Road eight No. 18 survey and Design Institute of the northwest department of science and technology Patentee after: POWERCHINA NORTHWEST ENGINEERING Co.,Ltd. Address before: 710065 Shaanxi Province, Xi'an City Road eight No. 18 survey and Design Institute of the northwest department of science and technology Patentee before: NORTHWEST HYDRO CONSULTING ENGINEERS, CHECC Address after: 710065 Shaanxi Province, Xi'an City Road eight No. 18 survey and Design Institute of the northwest department of science and technology Patentee after: NORTHWEST HYDRO CONSULTING ENGINEERS, CHECC Address before: 710065 Shaanxi Province, Xi'an City Road eight No. 18 survey and Design Institute of the northwest department of science and technology Patentee before: Northwest Hydro Consulting Engineers, CHECC |
|
| CX01 | Expiry of patent term |
Granted publication date: 20140430 |
|
| CX01 | Expiry of patent term |