CN102162229A - Sediment storage dam for protecting against large-scale low-frequency debris flow - Google Patents
Sediment storage dam for protecting against large-scale low-frequency debris flow Download PDFInfo
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- CN102162229A CN102162229A CN 201110041100 CN201110041100A CN102162229A CN 102162229 A CN102162229 A CN 102162229A CN 201110041100 CN201110041100 CN 201110041100 CN 201110041100 A CN201110041100 A CN 201110041100A CN 102162229 A CN102162229 A CN 102162229A
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Abstract
The invention discloses a sediment storage dam for protecting against large-scale low-frequency debris flow. The sediment storage dam comprises a foundation and a dam body, wherein, the dam body is equipped with strip drainage holes, the drainage holes are transversely arranged in parallel, and the distance between center lines of the drainage holes is 2.00-3.00mm; the foundation is made from rubble concrete, the dam body is made from grouted stone, and the drainage holes are made from concrete; and the dam body forms a slope surface in the upstream direction, and the slope ratio of the slope surface is 1:0.6. The sediment storage dam shows more remarkable advantages for mountain areas with low economic and technological level and low debris flow control investment level in China.
Description
Technical field
The present invention relates to hazards control engineering field, especially a kind of debris dam of defending extensive low frequency mud-rock flow.
Background technology
Recurrence interval is defined as the low frequency mud-rock flow greater than the mud-rock flow in 30 years.The mud-stone flow disaster overwhelming majority who causes great casualties is the low frequency mud-stone flow disaster.As, three Yu Gou in mountain and the Luo Jia valley ditch extensive mud-rock flow that happens suddenly behind the county town, Zhouqu County, Tibetan Autonomous Prefecture of Gannan, 23:40 branch Gansu Province on August 7 in 2010 causes 1287 people wrecked, is that 457 people are missing; Mud-rock flow destroys by rush of water surplus the house 5500, the mu surplus in the of 1400 of ploughing of burying, destroy by rush of water; Mud-rock flow forms in the Bai Long river valley and is about 550m, the damming dam of wide about 70m, the barrier lake of the long 3km of formation backwater.The low frequency mud-rock flow is difficult to prediction, generally take the method for engineering control to prevent and treat, the key of prevention and cure project design is to arrange the firm big-and-middle-sized backbone engineering-debris dam of blocking in cheuch, and debris dam should have the sufficient silt storage capacity that blocks simultaneously, and generally flood year is keeping empty storehouse etc.The success or not that the low frequency debris flow gully is administered is the design of key debris dam.
Administer the existing generally debris dam of the height of dam 〉=30m of employing in the engineering at existing low frequency mud-rock flow, form the huge sand storage that blocks and hold, a debris flow body is tackled behind the dam, with the safety of important foundation facilities such as protection cities and towns, downstream, highway, railway.The U.S., Japan, the former Soviet Union all adopt high dam to adopt and administer mud-rock flow, and Mai Jiao (Medeo) dam of building as the former Soviet Union is positioned on you Jing He (Malaya Alma-Atinka River) of Kazakhstan pony, and height of dam 150m blocks silt storage capacity 12.6 * 106m3; The U.S. has built the debris dam protection city of many height of dam 70-80m in area, Los Angeles.China has built the Chengdu-Kunming railway He Hugu town in the debris dam protection downstream of a high 30m at Mianning County, Sichuan salt well ditch.
Build high debris dam and be subjected to the restriction of multiple condition, as
(1) need build the landform and the geological conditions of large-scale debris dam;
(2) construction investment is big;
(3) execution conditions and construction technical requirement height as needs large-scale construction equipment and professional construction troop, need bigger construction plant and builder's road;
(4) existing debris dam can not be tackled silt selectively, just may deposit in general flood year, and the loss major part is blocked silt storage capacity, and when extensive low frequency mud-rock flow broke out, existing debris dam can not be brought into play the mitigation function effectively.
Summary of the invention
Technical problem to be solved by this invention is at the deficiencies in the prior art, and a kind of debris dam of defending extensive low frequency mud-rock flow is provided.
A kind of debris dam of defending extensive low frequency mud-rock flow comprises basis and dam body, and wherein: described dam body is provided with the strip discharge orifice, and discharge orifice is the layout that laterally is parallel to each other, discharge orifice centreline spacing 2.00～3.00m.
Described debris dam, described basis adopts rubble concrete to build, and dam body adopts stone masonry to build.
Described debris dam, described dam body upstream direction forms domatic, and this domatic slope ratio is 1: 0.6.
Described debris dam, concrete constructions is adopted in described cascading water hole.
Described debris dam, described dam body are provided with a breach as overfall, and described overfall is arranged on the top of discharge orifice.
Described debris dam, the width of described discharge orifice are 1.00～1.50m.
Described debris dam, described basis upstream side extend.
Described debris dam, key-wall is established in heel before the described dam body, and described key-wall 101 slopes are than being 1: 1.
Effect intentionally of the present invention is:
(1) solves general mud-rock flow raceway groove and lacked the dam site problem of building large-scale debris dam;
(2) can save 1/3 to 1/2 construction investment;
(3) debris dam can be gathered materials on the spot, and job practices is simple, does not need large-scale construction equipment, can organize local civilian worker's construction, is fit to China's national situation;
(4) debris dam storage capacity can be tackled silt selectively, blocks silt storage capacity and can use repeatedly.
China's mountain area economy technical level is low, and mud-rock flow control investment level is low, and this debris dam has more shown its superiority.
Description of drawings
Fig. 1 is the front view of debris dam of the present invention;
Fig. 2 is that the A-A of Fig. 1 is to sectional drawing.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
As depicted in figs. 1 and 2, be a kind of novel debris dam structural representation that is applicable to the control of low frequency mud-rock flow: comprise basis 10 and dam body 20, wherein: dam body 20 is provided with strip discharge orifice 30, and discharge orifice 30 is the layout that laterally is parallel to each other, discharge orifice 30 centreline spacings 2.00～3.00m.Discharge orifice 30 width are decided according to the particle diameter of the accumulation area gravel of catchment basin of debris flow, are generally 1.00～1.50m, and the degree of depth generally is slightly less than effective height of dam and (is as shown in fig. 1.。。Rice).Basis 10 adopts rubble concrete to build, and dam body 20 adopts stone masonry to build, and dam body 20 upstream direction form domatic, and this domatic slope ratio is 1: 0.6, the cascading water hole 30 that dam body is provided with draining and drains fine sediment, and concrete constructions is adopted in cascading water hole 30.Simultaneously, dam body 20 tops are provided with a breach as overfall 40, and overfall 40 is arranged on the top of discharge orifice, adopt concrete constructions.
Between general flood period in time, silt can be drained by discharge orifice 30 like this, keeps blocking sand storage and holds, can be when extensive mud-rock flow takes place with most of solid matter interception in the upstream, dam, and the safety that protection cities and towns, downstream and traffic lines etc. are implemented.
Key-wall 101 is established in heel before dam body 20; as shown in Figure 2; described key-wall 101 slopes are than being 1: 1; can prevent that like this mud-rock flow from crossing the safety of washing away the crisis debris dam that produces behind the dam; (in Fig. 1, dam foundation plinth buried depth is 5.00m, removes key-wall degree of depth 2.5m to have reduced the buried depth on debris dam basis simultaneously; the practical basis degree of depth is 2.5m), greatly reduce construction costs.
As shown in Figure 2,, after the debris dam operation, utilize the anti-dam body of mud-rock flow accumulation body like this, increase the stability of dam body, prevent that dam body from toppling debris dam basis 10 side extension upstream.
This novel sand engineering of blocking adopts gravity structure, the weir group arranges, debris dam is generally allowing fine sediment pass through from the cascading water hole 30 on the dam body in flood year, keep sufficient storage capacity, the debris dam group is with ratchel, coarse granule silt with float the wood interception in the storehouse when extensive mud-rock flow takes place, play and cut down the mud-rock flow peak flow, reduce mud-rock flow unit weight and reduce effect such as mud-rock flow destructive power, reach the purpose that alleviates and control disaster.Compare with the technology that the U.S., Japan, the former Soviet Union adopt high dam to administer mud-rock flow, this debris dam design scheme has significant advantage (table 1).
Table 1 debris dam design scheme comparison sheet
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (8)
1. the debris dam of the extensive low frequency mud-rock flow of defence is characterized in that comprise basis and dam body, wherein: described dam body is provided with the strip discharge orifice, and discharge orifice is the layout that laterally is parallel to each other, discharge orifice centreline spacing 2.00～3.00m.
2. debris dam according to claim 1 is characterized in that, described basis adopts rubble concrete to build, and dam body adopts stone masonry to build.
3. debris dam according to claim 1 is characterized in that, described dam body upstream direction forms domatic, and this domatic slope ratio is 1: 0.6.
4. debris dam according to claim 1 is characterized in that, concrete constructions is adopted in described cascading water hole.
5. debris dam according to claim 1 is characterized in that, described dam body is provided with a breach as overfall, and described overfall is arranged on the top of discharge orifice.
6. debris dam according to claim 1 is characterized in that, the width of described discharge orifice is 1.00～1.50m.
7. debris dam according to claim 1 is characterized in that, extend on described basis upstream side.
8. debris dam according to claim 1 is characterized in that, key-wall is established in heel before the described dam body, and described key-wall 101 slopes are than being 1: 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110041100 CN102162229A (en) | 2011-02-21 | 2011-02-21 | Sediment storage dam for protecting against large-scale low-frequency debris flow |
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| CN 201110041100 CN102162229A (en) | 2011-02-21 | 2011-02-21 | Sediment storage dam for protecting against large-scale low-frequency debris flow |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535408A (en) * | 2012-02-10 | 2012-07-04 | 中国科学院水利部成都山地灾害与环境研究所 | Semi-assembly type ecological debris flow check dam, and construction method thereof |
| CN102619195A (en) * | 2012-03-12 | 2012-08-01 | 中钢集团马鞍山矿山研究院有限公司 | Combined dam for stopping debris flow |
| CN102733352A (en) * | 2012-06-21 | 2012-10-17 | 兰州大学 | Opened debris flow blocking dam set |
| CN103088791A (en) * | 2013-02-27 | 2013-05-08 | 中国科学院水利部成都山地灾害与环境研究所 | Energy dissipation type debris flow check dam combined draining and guiding and blocking |
| CN103343526A (en) * | 2013-07-22 | 2013-10-09 | 中国科学院、水利部成都山地灾害与环境研究所 | Method for discriminating blocking type of window dam in debris flow interception process and application thereof |
| CN103526734A (en) * | 2013-10-29 | 2014-01-22 | 中国水电顾问集团成都勘测设计研究院有限公司 | Water diversion structure for water conservancy and hydropower engineering |
| CN106049371A (en) * | 2016-06-06 | 2016-10-26 | 王克强 | Dam storing silt and method for preventing soil loss through dam storing silt |
| CN107034853A (en) * | 2017-05-19 | 2017-08-11 | 兰州大学 | A kind of overflow-type mud-rock flow blocking dam and dam group |
| CN111639444A (en) * | 2020-06-19 | 2020-09-08 | 中国科学院、水利部成都山地灾害与环境研究所 | Method for measuring and calculating sand blocking rate of debris flow blocking dam and application |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265699A (en) * | 2008-05-12 | 2008-09-17 | 中国科学院水利部成都山地灾害与环境研究所 | Viscous mud-stone flow triangle bottom guide groove hydraulic optimum section design method and its uses |
| CN101463593A (en) * | 2009-01-08 | 2009-06-24 | 中国科学院水利部成都山地灾害与环境研究所 | Design method and use of transversal dentated sill embedded depth of foundation based on debris flow soft foundation energy dissipating |
| CN101718085A (en) * | 2009-11-05 | 2010-06-02 | 中国科学院水利部成都山地灾害与环境研究所 | Disposal method of Barrier Lake for artificially regulating and controlling drain flow and application thereof |
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2011
- 2011-02-21 CN CN 201110041100 patent/CN102162229A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265699A (en) * | 2008-05-12 | 2008-09-17 | 中国科学院水利部成都山地灾害与环境研究所 | Viscous mud-stone flow triangle bottom guide groove hydraulic optimum section design method and its uses |
| CN101463593A (en) * | 2009-01-08 | 2009-06-24 | 中国科学院水利部成都山地灾害与环境研究所 | Design method and use of transversal dentated sill embedded depth of foundation based on debris flow soft foundation energy dissipating |
| CN101718085A (en) * | 2009-11-05 | 2010-06-02 | 中国科学院水利部成都山地灾害与环境研究所 | Disposal method of Barrier Lake for artificially regulating and controlling drain flow and application thereof |
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| 《Journal of Mountain Science》 20050228 WANG Shige Characteristics of Large Low-frequency Debris Flow Hazards and Mitigation Strategies 第2卷, 第1期 * |
| 《山地学报》 20060930 王士革等 低频率泥石流灾害及工程防治 第24卷, 第5期 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535408B (en) * | 2012-02-10 | 2014-02-26 | 中国科学院水利部成都山地灾害与环境研究所 | Semi-assembly type ecological debris flow check dam, and construction method thereof |
| CN102535408A (en) * | 2012-02-10 | 2012-07-04 | 中国科学院水利部成都山地灾害与环境研究所 | Semi-assembly type ecological debris flow check dam, and construction method thereof |
| CN102619195A (en) * | 2012-03-12 | 2012-08-01 | 中钢集团马鞍山矿山研究院有限公司 | Combined dam for stopping debris flow |
| CN102733352A (en) * | 2012-06-21 | 2012-10-17 | 兰州大学 | Opened debris flow blocking dam set |
| CN103088791A (en) * | 2013-02-27 | 2013-05-08 | 中国科学院水利部成都山地灾害与环境研究所 | Energy dissipation type debris flow check dam combined draining and guiding and blocking |
| CN103088791B (en) * | 2013-02-27 | 2014-11-05 | 中国科学院、水利部成都山地灾害与环境研究所 | Energy dissipation type debris flow check dam combined draining and guiding and blocking |
| CN103343526A (en) * | 2013-07-22 | 2013-10-09 | 中国科学院、水利部成都山地灾害与环境研究所 | Method for discriminating blocking type of window dam in debris flow interception process and application thereof |
| CN103343526B (en) * | 2013-07-22 | 2015-05-20 | 中国科学院、水利部成都山地灾害与环境研究所 | Method for discriminating blocking type of window dam in debris flow interception process and application thereof |
| CN103526734A (en) * | 2013-10-29 | 2014-01-22 | 中国水电顾问集团成都勘测设计研究院有限公司 | Water diversion structure for water conservancy and hydropower engineering |
| CN106049371A (en) * | 2016-06-06 | 2016-10-26 | 王克强 | Dam storing silt and method for preventing soil loss through dam storing silt |
| CN106049371B (en) * | 2016-06-06 | 2018-06-26 | 王克强 | A kind of method for storing silt dam and its soil being prevented to be lost in |
| CN107034853A (en) * | 2017-05-19 | 2017-08-11 | 兰州大学 | A kind of overflow-type mud-rock flow blocking dam and dam group |
| CN111639444A (en) * | 2020-06-19 | 2020-09-08 | 中国科学院、水利部成都山地灾害与环境研究所 | Method for measuring and calculating sand blocking rate of debris flow blocking dam and application |
| CN111639444B (en) * | 2020-06-19 | 2023-02-28 | 中国科学院、水利部成都山地灾害与环境研究所 | Method for measuring and calculating sand blocking rate of debris flow blocking dam and application |
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Application publication date: 20110824 |