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精确预报,通宵会商,长江防总科学调度汉江洪水

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106 人 民 长 江 2010丘 Study on indicators and methods with regards to national eroded gully survey REN Bingfang,TIAN Hong (Soil and Water Conservation Monitoring Center,Changjiang Water Resources Commission,Wuhan 430010,China) Abstract: In the generation investigation on national water conservancy,eroded gully survey is one of the important contents of soil and water conservation.We can master its distribution,area and harmfulness through surveying the status of eroded gullies. We primarily explored the aims,objects,indicators and their collected methods,technical routes as well as the procedures of the national eroded gully survey.It is found that we can extract the survey indicators using”3 S’’technology and collect the indicators using GPS,laser rangefinder and traditional measuring methods,which provides technical support and reference for national ero— ded gully su ̄ey. Key words: eroded gully;survey indicators;indicator collection method;survey method …】…,……’…一,…~】一,・0‘ 】…】~一…,一l,……~】…■……… 一~…,… (上接第54页) Key technology of underground replacement——retaining structure application in Houzishi landslide control ZHENG Xuan 一,ZOU Conglie ,GAO Runde ,LIN Tong (1.State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430070,China; 2.Planning and Des n Department of Reservoir Region,Changjiang Institute of Survey, Planning,Design and Research,Wuhan 430010,China) Abstract: Underground replacement—retaining structure is first used in Houzishi landslide control with complex shape and ex- plicit arrangement.The key technical factors of structure application include structural arrangement way,key construction tech— nique,key constructional measures and effect monitoring measures.The structural arrangement way follows the implementation principle of dynamic design and informational construction,the localization method of arranging adits and shafts by tracing slip— pery belt,the excavation procedure of layered parallel construction,and the function classification of different adits and shafts. The key construction technique mainly manifests in maintaining cavern stability,protecting surrounding rock integrity and guaran— teeing structural concrete backfill quality.The key constructional measures mainly manifest in rebar mechanical splicing.quick— acting anchor and backfill grouting of roof.The effect monitoring mainly include landslide deformation,structure stress and un— derground seepage. Key words: control project;replacement—retaining structure;key technology;Three Gorges Reservoir Area:Houzishi land— slide …0…1…,…,~~…t一,…,………一…一~……………‘ ・简讯・ 精确预报,通宵会商,长江防总科学调度汉江洪水 受强降雨影响,丹江口水库出现历史上第二大入库流量, 以下河段的安全泄洪能力十分接近,处于临界状态。长江防总 汉江下游干流水位持续上涨,汉川站超保证水位。连日来,长 江防总连续滚动会商,应对汉江汛情、丹江口水库的调蓄以及 办的会商从当日14:O0一直持续到次日凌晨。长江防总再次向 湖北省防指发出紧急通知,要求进一步落实防汛责任制,及时 转移危险区群众;立即彻底扒毁东荆河沿线王小垸等阻水围 扒毁汉江下游阻洪圩垸,经过科学的调度和军民的严防死守, 2010年7月28日,汉江洪峰顺利通过汉川,7月29日10:00汉 川站水位已退出保证水位。 垸;切实做好汉江下游堤防巡堤查险;确保杜家台闸安全度汛。 7月28日04:00,根据最新的水情信息和东荆河阻水围垸的扒 口情况,长江防总办根据各方面信息形成会商意见并通报湖北 省。7月29日,汉江中下游干流各站先后现峰转退,至10:0O, 汉川站水位已退出保证水位。 长江防总办主任、长江委副主任魏山忠表示,精确的预测 自7月21日开始,汉江中上游发生强降雨,汉江干流仙桃、 沙洋站先后出现超警戒水位,汉川站出现超保证水位。7月28 日2O:00,汉川站水位达31.94 m,超保证水位0.25 m,仅比历史 最高水位32.09 m低0.15 m。至7月28日,汉江杜家台分洪闸 已做好分洪准备,防汛形势十分严峻。 长江防总办从预计强降雨发生时便开始滚动密集会商。7 预报和科学有效的调度,为有效应对此次汉江洪水打下了坚实 基础。当前,长江仍处于“七下八上”的关键时期,要严防今后 可能发生的大洪水,进一步加强防汛各项工作。 (长江) 月27~28日,汉江防洪处于最关键时刻,洪水洪峰流量与仙桃 

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