Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Emergency flood protection method for dam face of small earth and rockfill dam
The invention discloses a small earth and rockfill dam face emergency flood discharge protection method, and relates to the technical field of hydraulic engineering, the method comprises the following steps: S1, when the water level of an upstream reservoir of a small earth and rockfill dam reaches or approaches a check flood level, if the upstream still has large flood recently according to hydrological forecast, and an existing flood discharge measure cannot meet the flood discharge quantity requirement, the flood discharge measure cannot meet the check flood level; when the reservoir water level tends to rise continuously and the earth and rockfill dam has high risk of overtopping and dam break but has not overtopping yet, flood regulation calculation is carried out according to the predicted reservoir entering flood process, the reservoir capacity water level curve, the current discharge capacity and the dispatching operation mode to determine the prepared flood discharge amount of the reservoir; according to the method, an emergency drainage groove is excavated in the dam crest through a machine, a concrete hinge interlocking soft body row is adopted for anchoring and scour prevention, an emergency flow channel is rapidly constructed on the dam face in a half-excavation and half-filling mode, a cement-based fiber composite blanket is adopted for achieving rapid solidification forming of the flow channel, and a downward-excavation type stilling pool riprap protection is adopted for a dam foot; the reservoir water level can be reduced in time, and the overtopping dam break risk is effectively eliminated.
本发明公开了一种小型土石坝坝面应急过洪防护方法，涉及水利工程技术领域，所述方法包括如下步骤：S1.当小型土石坝上游库水位已达到或逼近校核洪水位，若根据水文预报上游近期仍有较大洪水，现有泄洪措施无法满足泄洪量要求，库水位呈现持续上涨趋势，土石坝存在漫顶溃坝高风险但尚未漫顶时，依据预测入库洪水过程、库容水位曲线、现状泄流能力、调度运行方式进行调洪计算确定水库预备泄洪量；本发明通过在坝顶利用机械开挖应急泄流槽，采用混凝土铰链联锁软体排锚定防冲，坝面利用半挖半填方式快速构建应急流道，采用水泥基纤维复合毯实现流道快速凝固成型，坝脚采用下挖式消力池抛石防护；能及时降低库水位，有效消除漫顶溃坝风险。
Emergency flood protection method for dam face of small earth and rockfill dam
The invention discloses a small earth and rockfill dam face emergency flood discharge protection method, and relates to the technical field of hydraulic engineering, the method comprises the following steps: S1, when the water level of an upstream reservoir of a small earth and rockfill dam reaches or approaches a check flood level, if the upstream still has large flood recently according to hydrological forecast, and an existing flood discharge measure cannot meet the flood discharge quantity requirement, the flood discharge measure cannot meet the check flood level; when the reservoir water level tends to rise continuously and the earth and rockfill dam has high risk of overtopping and dam break but has not overtopping yet, flood regulation calculation is carried out according to the predicted reservoir entering flood process, the reservoir capacity water level curve, the current discharge capacity and the dispatching operation mode to determine the prepared flood discharge amount of the reservoir; according to the method, an emergency drainage groove is excavated in the dam crest through a machine, a concrete hinge interlocking soft body row is adopted for anchoring and scour prevention, an emergency flow channel is rapidly constructed on the dam face in a half-excavation and half-filling mode, a cement-based fiber composite blanket is adopted for achieving rapid solidification forming of the flow channel, and a downward-excavation type stilling pool riprap protection is adopted for a dam foot; the reservoir water level can be reduced in time, and the overtopping dam break risk is effectively eliminated.
本发明公开了一种小型土石坝坝面应急过洪防护方法，涉及水利工程技术领域，所述方法包括如下步骤：S1.当小型土石坝上游库水位已达到或逼近校核洪水位，若根据水文预报上游近期仍有较大洪水，现有泄洪措施无法满足泄洪量要求，库水位呈现持续上涨趋势，土石坝存在漫顶溃坝高风险但尚未漫顶时，依据预测入库洪水过程、库容水位曲线、现状泄流能力、调度运行方式进行调洪计算确定水库预备泄洪量；本发明通过在坝顶利用机械开挖应急泄流槽，采用混凝土铰链联锁软体排锚定防冲，坝面利用半挖半填方式快速构建应急流道，采用水泥基纤维复合毯实现流道快速凝固成型，坝脚采用下挖式消力池抛石防护；能及时降低库水位，有效消除漫顶溃坝风险。
Emergency flood protection method for dam face of small earth and rockfill dam
一种小型土石坝坝面应急过洪防护方法
HE XIANFENG (Autor:in) / ZHANG QINGMING (Autor:in) / LI SHUYU (Autor:in) / LI YANZHUO (Autor:in) / YANG LEI (Autor:in) / LI BIDE (Autor:in) / LI MINGYANG (Autor:in) / LI HAIXIAO (Autor:in) / LI CHANGZHENG (Autor:in) / WANG RUI (Autor:in)
23.06.2023
Patent
Elektronische Ressource
Chinesisch
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