基于振冲碎石桩现场试验的软土坝基处理工艺研究  

Soft soil dam foundation treatment technology andeffectiveness evaluation based on on-site testing of vibroflotation gravel piles

作　　者：甘小泉 Gan Xiaoquan(Zhejiang Huadong Geotechnical Investigation&Design Institute Corporation Limited,Hangzhou Zhejiang 310014,China;PowerChina Huadong Engineering Corporation Limited,Hangzhou Zhejiang 311122,China)

机构地区：[1]浙江华东岩土勘察设计研究院有限公司,浙江杭州310014 [2]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122

出　　处：《山西建筑》2024年第8期182-186,共5页Shanxi Architecture

基　　金：中国电建集团华东勘测设计研究院科技项目(No.KY2021-KC-02-03,ZKY2023-HDJS-02-02)。

摘　　要：振冲碎石桩是软弱土坝基重要的加固手段,在实际的工程实践中,振冲碎石桩加固手段对于软弱坝基的处理是否有效需要基于现场试验进行检测。针对非洲卢旺达Nyabarongo II HPP工程的坝基振冲碎石桩加固措施难题,在国内选址了地质条件相似的温州仙湖试验区进行振冲碎石桩的现场试验,验证了振冲碎石桩加固深厚软土层的有效性。采用孔压静力触探试验、十字剪切板试验、动力触探试验、载荷试验检测振冲碎石桩的加固效果和地基承载力。相关研究可丰富软弱土坝基的振冲碎石桩施工处理工艺,为后续类似工程加固实践提供参考。In practical engineering practice,the effectiveness of the vibroflotation gravel pile reinforcement method in the treatment of weak dam foundations needs to be tested based on on-site tests.This study focuses on the reinforcement of vibroflotation gravel piles for the Nyabarongo II HPP project in Rwanda.On-site model tests of vibroflotation gravel piles were conducted in the Xianhu experimental area of Wenzhou.Verified the effectiveness of using vibro gravel piles to reinforce deep soft soil layers.Using pore pressure static penetration test,cross shear plate test,dynamic penetration test,and load plate test to test the reinforcement effect and foundation bearing capacity of vibro impact gravel piles.Related research can enrich the construction and treatment technology of vibro compaction gravel piles for weak soil dam foundations,and provide reference for similar engineering reinforcement practices in the future.

关 键 词：碎石桩 软弱土坝基 现场试验 地基承载力 

分 类 号：TU447[建筑科学—岩土工程]