The application of geomembrane combined with anti slide pile structure in soil slopes treatment and bridge foundationand protection in expansive soil area
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摘要: 由于膨胀土具有遇水膨胀失水收缩的特点,因此膨胀土边坡一般具有缓慢滑动的特性。即使边坡趋于稳定状体,一旦受外界影响,含水量变化产生的收缩裂缝也将引起滑动加剧发展,对桥桩基础产生较大的下滑力,导致桥体出现结构性破坏,带来巨大的损失。因此针对膨胀土滑坡的治理,除了布置合理的抗滑结构,采取有效的排水防渗措施尽量减少岸坡土体的湿度变化同样重要。通过某大桥工程实例,研究了膨胀土边坡导致大桥破坏的原因,并通过多种方案的对比,给出了抗滑桩结合复合土工膜隔离保湿应对膨胀土滑坡的治理思路及方法,解决了新桥的安全隐患,取得了良好的治理效果,对类似工程的防治对策提供借鉴。Abstract: Because the expansive soil has the characteristics of water loss and water loss, the expansive soil slope generally has the characteristics of slow sliding. Even if the slope tends to be stable, once influenced by the outside world, moisture changes resulting from the shrinkage crack will also cause sliding intensified development of pile foundation produced larger decline in force, resulting in bridge structural damage, bring huge losses. Therefore, in the expansive soil landslide governance, in addition to layout reasonable anti slide structure, take effective seepage control and drainage measures to try to reduce bank soil humidity change are equally important. The through an example of a large bridge project of expansive soil slope leading to the destruction of the bridge, and through comparison of several schemes, gives the anti sliding pile with composite geotechnical membrane isolation moisture with expansive soil landslide governance ideas and methods to solve the bridge safety hidden trouble, and achieved good control effect, prevention and control Countermeasures for similar projects for reference.
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Keywords:
- expansive soil /
- landslide /
- anti slide pile /
- composite geomembrane /
- seepage isolation
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