我国地域辽阔,每年均发生大量的泥石流灾害,给人民的生命财产安全带来巨大威胁.随着我国的经济不断发展,越来越多的泥石流隐患被治理;但是泥石流的形成原因复杂,不仅仅与地形相关,还与气候、地质和地下水等因素有着密切联系,这也就导致泥石流治理工程中拦挡结构的形式必须要根据现场实际情况来确定.常见的拦挡结构有重力式坝等,近年来桩板墙也被引入到泥石流的治理工程,桩板墙具有强度高、节省材料和拦挡效果好等优点.以舟曲某泥石流沟中桩板墙泥石流拦挡结构为背景,设置了桩板墙模型,放置在水槽中模拟泥石流冲击桩板墙的过程,通过布置在桩板墙迎水面的压力传感器来分析桩板墙的受力情况,并综合桩板墙的拦挡效果、排水效果和坝后淤积等情况进行研究.得到①目前已知的泥石流治理工程和模型试验中的桩板墙拦挡效果均比较明显,能够可以有效拦挡泥石流固体物质冲出物;②现有部分桩板墙工点及模型试验表明:桩板墙拦挡结构在泥石流的前期,可以通过泄水孔将水及时排出;但是当桩板墙后部淤积的固体物质达到一定厚度时,会导致排水通道被堵塞,影响排水;③桩板墙在泥石流治理工程中的受力模式不同于其在边(滑)坡工程中的受力,试验表明泥石流拦挡工程中桩板墙受到的冲击力由上向下逐渐增大,且桩板墙中部受力普遍比边缘要大.%China is vast territory,a large number of debris flow disaster occur in China every year,which threat security of people's life and property,along with our country's economic development,more and more of the debris flow were be governance.But the reasons for the formation of debris flow in complex,not only related to the terrain,and also closely related to factors such as climate,geology and groundwater,it bring structure in the landslide control project in the form of a must be determined according to the actual situation,common structures such as gravity dam,sheet pile wall in recent years have also been introduced into the landslide treatment engineering,sheet pile wall has high strength,material saving and effect is good wait for an advantage.Taking the sheet pile wall in the Zhouqu debris flow gully debris flow structures as the background,set the sheet pile wall model,placed in the chute in the simulation process of debris flow impact sheet pile wall,through the pressure sensor at the back of the layout in sheet pile wall model to analyze the stress of the sheet pile wall,and comprehensive sheet pile wall effect after deposition,and so on and so forth,drainage effect and dam are studied:the management engineering and model test of sheet pile wall effects are very well,and it can effectively stopped the solid matter;the existing sheet pile wall worksite and model test show that sheet pile wall structure can be through the drain water discharge in time at the early stages of the debris flow,but when sheet pile wall at the back of the deposition of solid material reaches a certain thickness,which because drainage channels was blocked;sheet pile wall force model in the landslide control project is different from the stress in the slope engineering,sheet pile wall by tests showed that the impact gradually increased from the bottom to the top of sheet pile wall,and the force in central is bigger than the edge of sheet pile wall.
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