CN204676578U - The dam foundation containing many disturbed belts of hole Combined Protection is oozed in curtain hole with cutting - Google Patents
The dam foundation containing many disturbed belts of hole Combined Protection is oozed in curtain hole with cutting Download PDFInfo
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- CN204676578U CN204676578U CN201520230733.4U CN201520230733U CN204676578U CN 204676578 U CN204676578 U CN 204676578U CN 201520230733 U CN201520230733 U CN 201520230733U CN 204676578 U CN204676578 U CN 204676578U
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Abstract
The utility model relates to a kind of curtain hole and cuts the dam foundation containing many disturbed belts oozing hole Combined Protection.The purpose of this utility model is by co-design, thus realizes ensureing on basis to the seepage preventing effect of weak low-angle dip disturbed belt, reach reduce dam foundation cavern quantity, speed up the work, the object of cost saving.The technical solution of the utility model is: the dam foundation containing many disturbed belts of hole Combined Protection is oozed in a kind of curtain hole with cutting; in basement rock below dam top, different elevation distributes many weak low-angle dip disturbed belts; described weak low-angle dip disturbed belt is arranged curtain hole and Jian Jieshen hole, curtain hole; be connected by grouted cut off wall between each layer curtain hole or between curtain hole with Jian Jieshen hole, curtain hole, the lower end of grouted cut off wall is positioned at lower floor's hole upstream side 5 ~ 10m scope and is connected by the level overlap joint curtain in lower floor hole.The utility model is applicable to dam foundation and there is the weak low-angle dip disturbed belt that many may form leakage passage.
Description
Technical field
The utility model relates to Hydraulic and Hydro-Power Engineering, and the dam foundation containing many disturbed belts of hole Combined Protection is oozed in especially a kind of curtain hole with cutting.Be applicable to dam foundation and there is the weak low-angle dip disturbed belt that many may form leakage passage.
Background technology
Along with the development of national economy, China builds Hydraulic and Hydro-Power Engineering in a large number, dam is the water retaining structure of multi-purpose project, in the design process for strengthening the process of basic seepage flow, usually in dam foundation arranging multiplayer curtain grouting hole, basic seepage flow is stopped by each layer curtain grouting basis of formation curtain; If there are many larger weak low-angle dip disturbed belts in basis, curtain grouting is poor for larger weak low-angle dip disturbed belt sealing effect, under the effect of high water head, still may there is larger seepage discharge along disturbed belt, bring potential safety hazard to the permanent operation of dam.
The processing mode of prior art as shown in Figure 1, run into the above-mentioned rock matter basis that there is larger weak low-angle dip disturbed belt, usually can adopt the design of the disturbed belt 5 on basic curtain axis being arranged and cutting and oozing hole 10, and in the 6-1 of curtain hole, upper strata, bore curtain grouting hole through cutting the processing method of oozing hole; Said method need ensure curtain boring through cut ooze hole, to boring required precision high, if and the disturbed belt number of plies is more, what dam foundation inside need be arranged cut, and to ooze hole also more, corresponding increase hole is dug and concrete backfill engineering quantity, and hole is dug explosion and can be caused the lax of periphery rock mass thus affect base rock integrality, increase curtain grouting difficulty.
Summary of the invention
The technical problems to be solved in the utility model is: provide a kind of curtain hole and cut the dam foundation containing many disturbed belts oozing hole Combined Protection; be intended to pass through co-design; thus realize ensureing on basis to the seepage preventing effect of weak low-angle dip disturbed belt, reach reduce dam foundation cavern quantity, speed up the work, the object of cost saving.
The technical scheme that the utility model adopts is: the dam foundation containing many disturbed belts of hole Combined Protection is oozed in a kind of curtain hole with cutting; in basement rock below dam top, different elevation distributes many weak low-angle dip disturbed belts; it is characterized in that: on described weak low-angle dip disturbed belt, arrange curtain hole and Jian Jieshen hole, curtain hole; be connected by grouted cut off wall between each layer curtain hole or between curtain hole with Jian Jieshen hole, curtain hole, the lower end of grouted cut off wall is positioned at lower floor's hole upstream side 5 ~ 10m scope and is connected by the level overlap joint curtain in lower floor hole.
The lining thickness in Jian Jieshen hole, described curtain hole is 1 ~ 1.5m.
At the bottom of upstream side excavation hole and the distance controlling of weak low-angle dip disturbed belt between 1.5 ~ 2.0m.
The beneficial effects of the utility model are: ooze the combination in hole by curtain hole with cutting, can reduce and ooze hole quantity containing cutting of many weak low-angle dip disturbed belt dam rock matter bases, thus reduce hole and dig the lax impact of explosion on basis, increase the globality of the dam foundation; Curtain hole is doubled as and oozes hole be arranged in grouted cut off wall downstream for cutting, dual section can be formed to weak low-angle dip disturbed belt and ooze protection (grouted cut off wall+curtain hold concurrently section ooze hole).By dam foundation curtain hole being doubled as the co-design of cutting and oozing hole, ensure that the seepage preventing effect of the weak low-angle dip disturbed belt of the dam foundation, and effectively reduce cavern's quantity in the dam foundation thus speed up the work, cost saving, what this technology can be a large amount of are applied to exists many weaknesses and delays in the design of Hydraulic and Hydro-Power Engineering scheme selection of the disturbed belt that inclines.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model background technology.
Fig. 2 is that the utility model curtain (cut and ooze) hole is along dam foundation curtain line spread figure.
Fig. 3 is that the utility model curtain (cut and ooze) hole is along dam foundation sectional drawing (A-A section).
Fig. 4 is the utility model curtain (cut and ooze) hole typical section figure.
Detailed description of the invention
As shown in Figure 2, the present embodiment comprises original place upper thread 1, dam foundation face 2, dam top 3 and dam transverse joint 4 containing the dam foundation of many disturbed belts, and in the basement rock of dam top less than 3, different elevation is distributed with three weak low-angle dip disturbed belts 5.The present embodiment is arranged at the dam foundation and three curtain hole 6-1 and weak low-angle dip disturbed belt 5 is arranged three curtain holes Jian Jieshen hole 6-2.
As shown in Figure 3, be connected by grouted cut off wall 7 between each layer curtain hole 6-1 or between curtain hole 6-1 with Jian Jieshen hole, curtain hole 6-2, grouted cut off wall 7 extends within the scope of the upstream side 5 ~ 10m in lower floor hole at the bottom of the hole in hole, upper strata, and the bottom of grouted cut off wall 7 is overlapped with lower floor hole by the level overlap joint curtain 8 in lower floor hole again.
As shown in Figure 4, described curtain hole 6-1 and Jian Jieshen hole, curtain hole 6-2 all adopts C30 concrete lining, wherein the lining thickness of curtain hole Jian Jieshen hole 6-2 is that 1 ~ 1.5m (thickeies lining cutting raising section and oozes seepage paths, ensure seepage preventing effect), all the other curtain hole 6-1 lining thicknesses are 0.5m.
Except adopting, label is C30 to Jian Jieshen hole, curtain hole 6-2, seepage-resistant grade is except the graduation two concrete of W10, upstream side excavates at the bottom of hole and the distance of weak low-angle dip disturbed belt also should control between 1.5 ~ 2.0m, to ensure that cutting of lining concrete oozes seepage paths length.
Claims (3)
1. a curtain hole with cut the dam foundation containing many disturbed belts oozing hole Combined Protection, in the following basement rock of dam top (3), different elevation distributes many weak low-angle dip disturbed belts (5), it is characterized in that: in described weak low-angle dip disturbed belt (5) upper layout curtain hole (6-1) and Jian Jieshen hole, curtain hole (6-2), be connected by grouted cut off wall (7) between each layer curtain hole (6-1) or between curtain hole (6-1) with Jian Jieshen hole, curtain hole (6-2), the lower end of grouted cut off wall (7) is positioned at lower floor's hole upstream side 5 ~ 10m scope and is connected by level overlap joint curtain (8) in lower floor hole.
2. curtain hole according to claim 1 with cut ooze hole Combined Protection containing the dam foundation of many disturbed belts, it is characterized in that: the lining thickness in Jian Jieshen hole, described curtain hole (6-2) is 1 ~ 1.5m.
3. curtain hole according to claim 1 and 2 with cut ooze hole Combined Protection containing the dam foundation of many disturbed belts, it is characterized in that: at the bottom of upstream side excavation hole and the distance controlling of weak low-angle dip disturbed belt between 1.5 ~ 2.0m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520230733.4U CN204676578U (en) | 2015-04-16 | 2015-04-16 | The dam foundation containing many disturbed belts of hole Combined Protection is oozed in curtain hole with cutting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520230733.4U CN204676578U (en) | 2015-04-16 | 2015-04-16 | The dam foundation containing many disturbed belts of hole Combined Protection is oozed in curtain hole with cutting |
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| Publication Number | Publication Date |
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| CN204676578U true CN204676578U (en) | 2015-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520230733.4U Active CN204676578U (en) | 2015-04-16 | 2015-04-16 | The dam foundation containing many disturbed belts of hole Combined Protection is oozed in curtain hole with cutting |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105970966A (en) * | 2016-05-17 | 2016-09-28 | 中国电建集团华东勘测设计研究院有限公司 | Excavation construction method for weak disturbed belt at foundation of super-high arch dam |
| CN109440790A (en) * | 2018-11-30 | 2019-03-08 | 中国电建集团华东勘测设计研究院有限公司 | The deep understable high rock slope comprehensive strengthening method of off-load |
| CN109914459A (en) * | 2019-04-17 | 2019-06-21 | 黄河勘测规划设计研究院有限公司 | A kind of ultra-deep dam foundation grout curtain structure |
-
2015
- 2015-04-16 CN CN201520230733.4U patent/CN204676578U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105970966A (en) * | 2016-05-17 | 2016-09-28 | 中国电建集团华东勘测设计研究院有限公司 | Excavation construction method for weak disturbed belt at foundation of super-high arch dam |
| CN105970966B (en) * | 2016-05-17 | 2018-02-02 | 中国电建集团华东勘测设计研究院有限公司 | A kind of excavation construction method of extra-high arch dam foundation weakness disturbed belt |
| CN109440790A (en) * | 2018-11-30 | 2019-03-08 | 中国电建集团华东勘测设计研究院有限公司 | The deep understable high rock slope comprehensive strengthening method of off-load |
| CN109440790B (en) * | 2018-11-30 | 2024-01-26 | 中国电建集团华东勘测设计研究院有限公司 | Comprehensive reinforcement method for deep unloading understable rock high slope |
| CN109914459A (en) * | 2019-04-17 | 2019-06-21 | 黄河勘测规划设计研究院有限公司 | A kind of ultra-deep dam foundation grout curtain structure |
| CN109914459B (en) * | 2019-04-17 | 2024-03-12 | 黄河勘测规划设计研究院有限公司 | Ultra-deep dam foundation grouting curtain structure |
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| C14 | Grant of patent or utility model | ||
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