桩板墙在泥石流治理工程中受力模式试验研究

发布时间：2018-06-26 14:13

本文选题：泥石流 + 桩板墙　；参考：《科学技术与工程》2017年05期

【摘要】：近年来,每当我国进入雨季后都会有由于强降雨形成的泥石流灾害的出现;这种情况已经造成了大量的人员伤亡和财产损失,例如2016年福建泰宁泥石流灾害造成34人遇难,2010年甘肃舟曲特大型泥石流造成了千余人遇难;因此对泥石流的治理和防范工作成为了地形地质复杂地区的重中之重。泥石流具有爆发突然、冲击能量大、破坏性强等特点,又受地形、地质以及降雨情况等复杂情况的影响,对治理工程的强度要求较高。近年来,常用于边坡工程中的桩板墙结构被广泛的应用于泥石流治理工程中,由于泥石流冲击力为动荷载,其受力模式与在边坡工程中截然不同由于桩板墙造价较高,在实际工程中往往需要配合其它附属工程共同使用。以桩板墙泥石流拦挡结构为研究对象,设置了桩板墙模型,同时配合柔性网、格宾,放置在溜槽中模拟泥石流冲击桩板墙的过程,通过布置在桩板墙模型后部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在模型试验中桩板墙的拦挡效果良好,可以将大部分体积较大的固体物质拦下。2在桩板墙后部设置格宾和柔性网均可以有效降低泥石流对桩板墙的冲击力,格宾和柔性网各有优点,柔性网的排水效果相较于格宾要好,格宾相较于柔性网可以更有效的降低泥石流的冲击力。3桩板墙后部易形成漩涡,对坝后地基造成严重的侵蚀。4当坝后淤满固体物质后,会将排水通道堵塞,应当加强排水措施。
[Abstract]:In recent years, whenever China enters the rainy season, there will always be debris flow disasters caused by heavy rainfall. This situation has caused a large number of casualties and property losses. For example, the debris flow disaster in Taining, Fujian Province, killed 34 people in 2016, and over a thousand people died in 2010 in Zhouqu, Gansu Province. Therefore, the management and prevention of debris flow has become a top priority in the areas with complicated topography and geology. Debris flow has the characteristics of sudden eruption, large impact energy, strong destructive and so on. It is also affected by the complex conditions such as topography, geology and rainfall, etc., so the intensity of the control project is very high. In recent years, the pile-slab wall structure, which is often used in slope engineering, is widely used in debris flow treatment engineering. Because the impact force of debris flow is dynamic load, its stress mode is very different from that in slope engineering because of the high cost of pile and slab wall. In practical projects, it is often necessary to cooperate with other ancillary projects. Taking the debris flow retaining structure of pile and plate wall as the research object, the pile-plate wall model is set up, and the process of debris flow impacting pile and plate wall is simulated in the chute with flexible net and Gabin. The stress of the pile-slab wall is analyzed by the pressure sensor which is arranged in the back of the pile-slab wall model, and the blocking effect, drainage effect and siltation behind the dam are studied. It is obtained that in the model test, the retaining effect of the pile-slab wall is good, and the blockage of most of the bulk solid matter in the back of the pile-plate wall can be effectively reduced by the setting of Gabin and flexible net in the back of the pile-slab wall, which can effectively reduce the impact force of the debris flow on the pile-slab wall. The draining effect of flexible net is better than that of Gabin. Compared with flexible net, Gabin can reduce the impact force of debris flow more effectively and form whirlpool at the back of pile plate wall. Serious erosion to the foundation behind the dam .4 when the silt behind the dam is filled with solid material, the drainage channel will be blocked, and the drainage measures should be strengthened.
【作者单位】：中铁西北科学研究院有限公司;中国铁道科学研究院研究生部;
【基金】：中铁科研院(科研)字2015-KJ026-Z026-03资助
【分类号】：P642.22;TU473

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