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A platform for research: civil engineering, architecture and urbanism
Gravel burst control method for emergency disposal of gravelly soil barrier lake
The invention relates to the technical field of natural geological disaster emergency disposal and outburst flood prevention and control, and particularly discloses a gravelly soil barrier lake emergency disposal grading outburst control method which comprises the specific steps that multiple stages of gabions are arranged on the downstream slope of a barrier dam and wrapped and protected by an impermeable covering film to serve as the scouring datum plane of each stage of outburst, and the gabions are arranged on the downstream slope of the barrier dam; and the downstream slope surface of each stage of gabion is covered and protected by a waterproof slope surface covering film. In the emergency disposal process of the barrier lake, the slope surface covering film is removed step by step, the slope surface is exposed, and under the scouring and undercutting action of discharged water flow, the slope surface is damaged, the gabion collapses, and the barrier dam breaks from high to low step by step. Through the method, the one-time outburst process of a high-risk barrier lake with a large height is decomposed into a plurality of small barrier lake sequential outburst processes, the flow and time relation curve of the outburst process is also changed into a multi-peak type from a single-peak type, the outburst height is reasonably set, the peak value discharge flow of each stage of outburst can be controlled within an allowable range, and the outburst rate of each stage of outburst can be controlled within the allowable range. And flood disasters are avoided. The method is suitable for emergency disposal of the barrier lake composed of gravelly soil, flood disasters can be completely avoided, required devices are simple and can be transported manually, the cost is low, the construction speed is high, large mechanical equipment is not needed, and the method is not limited by traffic conditions.
本发明涉及自然地质灾害应急处置、溃决洪水防治技术领域，具体公开了一种碎石土堰塞湖应急处置分级溃决控制方法，具体步骤包括:在堰塞坝下游坡设置多级石笼并用不透水覆盖膜包裹保护，作为每级溃决的冲刷基准面，每级石笼的下游坡面均用不透水坡面覆盖膜覆盖保护。在堰塞湖应急处置过程中，逐级拆除坡面覆盖膜，裸露坡面，在下泄水流冲刷掏蚀作用下，坡面破坏，石笼坍塌，堰塞坝从高到低逐级发生溃决。通过该方法，将一个高度大的高危堰塞湖的一次性溃决过程分解为若干个小型堰塞湖依次溃决过程，溃决过程的流量与时间关系曲线也由单峰型变为多峰型，通过合理设置溃决高度，可将每级溃决的峰值下泄流量控制在允许范围，避免洪灾发生。该方法适用于由碎石土组成的堰塞湖应急处置，可完全避免洪灾发生，所需装置简单且可人力运输，成本低廉，施工速度快，无需大型机械设备，不受交通条件限制。
Gravel burst control method for emergency disposal of gravelly soil barrier lake
The invention relates to the technical field of natural geological disaster emergency disposal and outburst flood prevention and control, and particularly discloses a gravelly soil barrier lake emergency disposal grading outburst control method which comprises the specific steps that multiple stages of gabions are arranged on the downstream slope of a barrier dam and wrapped and protected by an impermeable covering film to serve as the scouring datum plane of each stage of outburst, and the gabions are arranged on the downstream slope of the barrier dam; and the downstream slope surface of each stage of gabion is covered and protected by a waterproof slope surface covering film. In the emergency disposal process of the barrier lake, the slope surface covering film is removed step by step, the slope surface is exposed, and under the scouring and undercutting action of discharged water flow, the slope surface is damaged, the gabion collapses, and the barrier dam breaks from high to low step by step. Through the method, the one-time outburst process of a high-risk barrier lake with a large height is decomposed into a plurality of small barrier lake sequential outburst processes, the flow and time relation curve of the outburst process is also changed into a multi-peak type from a single-peak type, the outburst height is reasonably set, the peak value discharge flow of each stage of outburst can be controlled within an allowable range, and the outburst rate of each stage of outburst can be controlled within the allowable range. And flood disasters are avoided. The method is suitable for emergency disposal of the barrier lake composed of gravelly soil, flood disasters can be completely avoided, required devices are simple and can be transported manually, the cost is low, the construction speed is high, large mechanical equipment is not needed, and the method is not limited by traffic conditions.
本发明涉及自然地质灾害应急处置、溃决洪水防治技术领域，具体公开了一种碎石土堰塞湖应急处置分级溃决控制方法，具体步骤包括:在堰塞坝下游坡设置多级石笼并用不透水覆盖膜包裹保护，作为每级溃决的冲刷基准面，每级石笼的下游坡面均用不透水坡面覆盖膜覆盖保护。在堰塞湖应急处置过程中，逐级拆除坡面覆盖膜，裸露坡面，在下泄水流冲刷掏蚀作用下，坡面破坏，石笼坍塌，堰塞坝从高到低逐级发生溃决。通过该方法，将一个高度大的高危堰塞湖的一次性溃决过程分解为若干个小型堰塞湖依次溃决过程，溃决过程的流量与时间关系曲线也由单峰型变为多峰型，通过合理设置溃决高度，可将每级溃决的峰值下泄流量控制在允许范围，避免洪灾发生。该方法适用于由碎石土组成的堰塞湖应急处置，可完全避免洪灾发生，所需装置简单且可人力运输，成本低廉，施工速度快，无需大型机械设备，不受交通条件限制。
Gravel burst control method for emergency disposal of gravelly soil barrier lake
一种碎石土堰塞湖应急处置分级溃决控制方法
XU HONGMEI (author) / WANG YANG (author) / HOU LONGQING (author) / QIU DEMING (author) / HUANG LIHUA (author) / LI MINGDONG (author)
2024-06-04
Patent
Electronic Resource
Chinese
IPC:
E02B
HYDRAULIC ENGINEERING
,
Wasserbau
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