CN104762924A - Upper storage reservoir basin seepage preventing method - Google Patents
Upper storage reservoir basin seepage preventing method Download PDFInfo
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- CN104762924A CN104762924A CN201510123092.7A CN201510123092A CN104762924A CN 104762924 A CN104762924 A CN 104762924A CN 201510123092 A CN201510123092 A CN 201510123092A CN 104762924 A CN104762924 A CN 104762924A
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Abstract
The invention discloses an upper storage reservoir basin seepage preventing method. Rock mass water-permeable rate detection is performed according to the exposure situation of an upper storage reservoir basin bed rock, and rock mass surface closing and seepage preventing treatment is conducted in a region with rock mass water-permeable rate q smaller than 3 Lu (lugeon) by adopting a pneumatically placed concrete layer. Reinforced concrete slabs are adopted to perform surface closing seepage preventing treatment in an intensive joint belt rock mass region with rock mass water-permeable rate q greater than 3 Lu (lugeon) and a fracture development position rock mass region. A non-fine concrete water drainage pad layer is arranged at the lower portion of the reinforced concrete slabs, multiple water-permeable pipes are arranged at the lower portion of the non-fine concrete water drainage pad layer so as to reduce floating-supporting force of the reinforced concrete slabs and ensure engineering safety. According to different permeability characteristics of an upper storage reservoir rock mass, the reinforced concrete slabs and the pneumatically placed concrete layer are combined for seepage preventing, and the purposes of saving investment, facilitating construction and saving water sources are achieved while the seepage preventing requirements of rocks different in permeability are met.
Description
Technical field
The present invention relates to Reservoir basin anti-permeation method in Hydraulic and Hydro-Power Engineering, especially relate to upper storage reservoir storehouse basin anti-permeation method.
Background technology
In Hydraulic and Hydro-Power Engineering, antiseepage is one of most important work in engineering treatment.For the storehouse basin design of pumped storage power plant, particularly for the upper storage reservoir of pumped storage power plant, often owing to being positioned at mountain top, self catchment area is very little, rely on natural water can not meet normal reservoir impoundment power generation requirement, can only on the lower reservoir draw water supreme reservoir filling generating; Therefore, for upper storage reservoir, water is valuable to pass.This just makes the quality of upper storage reservoir storehouse basin antiseepage, determines the success or failure of whole engineering.In traditional pumping energy storage power station project, the basin antiseepage of armored concrete slab full storehouse is taked in the basin antiseepage of upper storage reservoir storehouse more, or takes asphalt concrete face slab antiseepage, also takes geomembrane anti-seepage, and takes clay core or vertical curtain antiseepage etc.Armored concrete slab anti-seepage effect is better, but investment is large, speed of application is slower; Asphalt concrete face slab anti-seepage effect is good, but investment is large and construction technology is more complicated, and regional suitability is poor; Geomembrane anti-seepage adaptive deformation ability is strong, cost is low, but construction more complicated, easily aging, the life-span is short; Clay core easy construction, cost are low, but the scope of application is little, are generally only applicable to bottom of the reservior and are not suitable for storehouse bank.Although vertical curtain antiseepage landform compliance is comparatively strong, because its anti-seepage effect is relatively poor, generally only as a kind of supplementary means of horizontal leakage preventing.Therefore, select suitable upper storage reservoir storehouse basin anti-permeation method, most important for convenient construction, investment reduction.
Summary of the invention
The object of the invention is to provide a kind of upper storage reservoir storehouse basin anti-permeation method.
For achieving the above object, the present invention takes following technical proposals:
Upper storage reservoir storehouse of the present invention basin anti-permeation method, first permeability of surrounding rock detection is carried out according to described upper storage reservoir storehouse basin basement rock exposure situation, for permeability of surrounding rock q < 3Lu(Lv Rong) region, adopt pneumatically placed concrete layer to carry out rock mass surface-closed Anti-seeping technology; For permeability of surrounding rock q > 3Lu(Lv Rong) joint density area rock mass region, rock mass region, cranny development position, adopt armored concrete slab carry out surface-closed Anti-seeping technology; The close range of armored concrete slab, namely the width in joint density area rock mass region, rock mass region, cranny development position is extended, determine according to the head acted on armored concrete slab, permeability of surrounding rock, steel concrete plate thickness, determines according to the modulus of elasticity in the head acted on armored concrete slab and joint density area rock mass region, rock mass region, cranny development position and modulus of deformation; Meanwhile, non-fine concrete drainage blanket is set in armored concrete slab bottom, at the multiple water-permeable pipe of non-fine concrete drainage blanket lower disposed, to reduce the uplift pressure of armored concrete slab, ensures engineering safety.
The present invention according to upper storehouse basin rock mass different permeability feature, adopt armored concrete slab combine antiseepage with pneumatically placed concrete layer, its advantage major embodiment in the following areas:
1, suit measures to local conditions to select different seepage control measures, while meeting different permeability rock antiseepage requirement, reach investment reduction, convenient construction object.
2, in the larger rock mass region of permeability as joint density area, adopt the good armored concrete slab of anti-seepage effect to carry out antiseepage, substantially reduce leakage, effective guarantee anti-seepage effect.
3, surperficial pneumatically placed concrete layer is adopted to carry out antiseepage in the rock mass region that permeability is less, the permeability of rock self is very little, add the top layer antiseepage of pneumatically placed concrete layer, antiseepage requirement is met with less input, and pneumatically placed concrete layer speed of application is fast, be beneficial to accelerating construction progress, shorten the construction period.
4, armored concrete slab combines antiseepage with pneumatically placed concrete layer, and the construction technology of employing is more ripe, and construction method is comparatively simple, and quality is more easy to control, convenient later maintenance, invests less.
5, adopt non-fine concrete drainage blanket and be arranged in the water-permeable pipe of its underpart, playing and collect, drain, collect pumpback and reuse percolating water effect, reach saving water resource, energy-conserving and environment-protective object.
Accompanying drawing explanation
Fig. 1 is the leakage preventing structure schematic diagram of the upper storage reservoir storehouse basin according to the inventive method enforcement.
Detailed description of the invention
As shown in Figure 1, upper storage reservoir storehouse of the present invention basin anti-permeation method, first permeability of surrounding rock detection is carried out according to described upper storage reservoir storehouse basin basement rock exposure situation, for permeability of surrounding rock q < 3Lu(Lv Rong) region 1, adopt pneumatically placed concrete layer 2 to carry out rock mass surface-closed Anti-seeping technology; For permeability of surrounding rock q > 3Lu(Lv Rong) joint density area rock mass, rock mass region, cranny development position 3, adopt armored concrete slab 4 carry out surface-closed Anti-seeping technology; The close range of armored concrete slab 4, namely extends the width in joint density area rock mass region, rock mass region, cranny development position 3, according to the head acted on armored concrete slab, permeability of surrounding rock, determines according to design discipline; The thickness of armored concrete slab 4, according to modulus of elasticity and the modulus of deformation of the head acted on armored concrete slab 4 and joint density area rock mass, cranny development position rock mass, determines according to design discipline.For reducing because the uplift pressure of sudden drawdown generation is on the impact of impervious body, and basin infiltration in storehouse is converged again draw back in storehouse to dam and be used, at storehouse basin armored concrete slab, 4 times non-fine concrete drainage blanket 5 is set, non-fine concrete drainage blanket 5 is built and is adopted 525# Portland cement, and cement factor is 200 ~ 300kg/m
3, cement, water, aggregate referential weight are than being 1:0.42:6, and the compressive strength in the 28 day length of time is not less than 10Mpa, and aggregate adopts the uniform rubble of 10 ~ 20mm particles, with its surface of cement paste uniform fold.Non-fine concrete bed course 5 average thickness is 20cm, and minimum thickness is not less than 10cm.
At the non-fine concrete drainage blanket 5 be arranged under storehouse basin armored concrete slab 4 and pneumatically placed concrete layer 2 lower disposed water-permeable pipe 6, water-permeable pipe 6 takes latticed layout, between, array pitch is not more than 15m, water-permeable pipe 6 surrounding of pneumatically placed concrete layer 2 adopts non-fine concrete parcel, notices that water-permeable pipe 6 does not block, is out of shape when building water-permeable pipe 6 periphery non-fine concrete layer 2.Water-permeable pipe 6 adopts flexible porous tube, for PVC wraps up steel hinge line skeleton outer layer covers geotextiles in water-permeable pipe 6, be divided into supervisor, arm two kinds of forms, supervisor's caliber φ 300mm, branch diameter φ 100mm, supervisor and supervisor, to be responsible for and arm, between arm and arm, joint has yi word pattern joint, tee T joint, cross joint.The support that supervisor joint adopts bearing bar cage to carry out being responsible for, with fixing, adopt galvanized wire will be responsible for circumferential reinforcement and is connected with the colligation of bearing bar cage during connection.Supervisor and when wearing dam fastener for connection, bearing bar cage with wear together with dam steel-pipe welding.When arm is connected with arm with supervisor, arm, adopts the own geotextiles of arm (removing the steel strand of PVC parcel) to be wrapped in supervisor with on arm, and then by geotextiles, joint is wrapped.
Claims (1)
1. a upper storage reservoir storehouse basin anti-permeation method, it is characterized in that: first carry out permeability of surrounding rock detection according to described upper storage reservoir storehouse basin basement rock exposure situation, for the region of permeability of surrounding rock q < 3Lu, pneumatically placed concrete layer is adopted to carry out rock mass surface-closed Anti-seeping technology; For joint density area rock mass region, the rock mass region, cranny development position of permeability of surrounding rock q > 3Lu, armored concrete slab is adopted to carry out surface-closed Anti-seeping technology; The close range of armored concrete slab, namely the width in joint density area rock mass region, rock mass region, cranny development position is extended, determine according to the head acted on armored concrete slab, permeability of surrounding rock, the thickness of armored concrete slab, determines according to the modulus of elasticity in the head acted on armored concrete slab and joint density area rock mass region, rock mass region, cranny development position and modulus of deformation; Meanwhile, non-fine concrete drainage blanket is set in armored concrete slab bottom, at the multiple water-permeable pipe of non-fine concrete drainage blanket lower disposed, to reduce the uplift pressure of armored concrete slab.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510123092.7A CN104762924A (en) | 2015-03-20 | 2015-03-20 | Upper storage reservoir basin seepage preventing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510123092.7A CN104762924A (en) | 2015-03-20 | 2015-03-20 | Upper storage reservoir basin seepage preventing method |
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| CN104762924A true CN104762924A (en) | 2015-07-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266043A (en) * | 2021-06-09 | 2021-08-17 | 广东省水利水电第三工程局有限公司 | Bottom sealing method for rock foundation pressure-bearing fracture water |
| CN114775529A (en) * | 2022-05-06 | 2022-07-22 | 重庆交通大学 | Seepage-proofing, drainage and heat-insulating structure suitable for pumped storage upper reservoir bank and construction method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201074314Y (en) * | 2007-05-14 | 2008-06-18 | 江苏省水利科学研究所 | Reservoir bottom seepage-control structure |
| CN201485823U (en) * | 2009-04-23 | 2010-05-26 | 北京国电水利电力工程有限公司 | Anti-seepage structure of hydraulic asphalt concrete panel |
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2015
- 2015-03-20 CN CN201510123092.7A patent/CN104762924A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201074314Y (en) * | 2007-05-14 | 2008-06-18 | 江苏省水利科学研究所 | Reservoir bottom seepage-control structure |
| CN201485823U (en) * | 2009-04-23 | 2010-05-26 | 北京国电水利电力工程有限公司 | Anti-seepage structure of hydraulic asphalt concrete panel |
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| 王樱畯: "《抽水蓄能电站工程建设论文集2010》", 31 October 2010 * |
| 王贵军等: "回龙抽水蓄能电站上库渗流计算及防渗方案选择", 《小水电》, no. 6, 31 December 2003 (2003-12-31) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266043A (en) * | 2021-06-09 | 2021-08-17 | 广东省水利水电第三工程局有限公司 | Bottom sealing method for rock foundation pressure-bearing fracture water |
| CN113266043B (en) * | 2021-06-09 | 2022-04-29 | 广东省水利水电第三工程局有限公司 | Bottom sealing method for rock foundation pressure-bearing fracture water |
| CN114775529A (en) * | 2022-05-06 | 2022-07-22 | 重庆交通大学 | Seepage-proofing, drainage and heat-insulating structure suitable for pumped storage upper reservoir bank and construction method thereof |
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Application publication date: 20150708 |