Application of micro-stell grouting steel pipe piles in landslide emergency control project
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摘要: 微型钢管桩具有造价低、工期短、布置灵活等优点，逐渐被应用于滑坡治理工程。然而由于微型钢管桩多为大面积成群布桩，注浆施工将对地下水自然排泄产生影响，进而影响滑坡治理效果。因此，采用微型钢管桩进行滑坡治理时，应考虑桩群后部坡体地下水排泄问题。以贵州某天然气管道滑坡应急治理工程为例，通过优化钢管桩平面布置及施工工艺，在桩群之间合理留设地下水排泄通道，有效降低了桩群后部的地下水位，减小了桩后滑坡推力。钢管桩施工完成后，滑坡整体处于稳定状态，表明治理方案合理可行，可为类似滑坡防治工程设计和施工提供借鉴。Abstract: Micro-steel pipe piles are widely used in landslide control project for their low cost, short construction period, and flexible layout. Due to the fact that most micro steel pipe piles are arranged in large groups, grouting construction will have an impact on the natural discharge of groundwater, leading to an increase in the groundwater level on the slope and thus affecting the effect of landslide control. Therefore, when using micro steel pipe piles for landslide control, the issue of groundwater discharge at the back of the pile group should be considered. Taking the emergency control project of a natural gas pipeline landslide in Guizhou as an example. By optimizing the layout and construction technology of steel pipe piles, a reasonable groundwater drainage channel was reserved between pile groups, effectively reducing the groundwater level at the back of the pile group and reducing the landslide thrust behind the piles. After the completion of steel pipe pile construction, the overall stability of the landslide indicates that the treatment plan is reasonable and feasible, which can provide reference for the design and construction of similar landslide prevention projects.
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Key words:
- micro-steel pipe pile /
- landslide control /
- groundwater /
- drainage channel
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