路基工程
路基工程
로기공정
SUBGRADE ENGINEERING
2012年
4期
38-41
,共4页
铁路路基%液化地基%孔压%振动台模型试验
鐵路路基%液化地基%孔壓%振動檯模型試驗
철로로기%액화지기%공압%진동태모형시험
railway subgrade%liquefied foundation%pore pressure%shaking table model test
以玉蒙铁路碎石桩加固处理路堤液化地基为工程背景,采用水平振动模拟地震荷载进行了碎石桩复合地基路基的振动台模型试验,试验测试了不同位置的孔压,对孔压的时程、分布特点和孔压比的变化进行了分析。水平加速度为0.3 g时,路堤坡脚以外地基产生液化,而路堤范围内未出现液化。采用碎石桩复合地基加固铁路液化地基时,需适当加宽加固地基的宽度。
以玉矇鐵路碎石樁加固處理路隄液化地基為工程揹景,採用水平振動模擬地震荷載進行瞭碎石樁複閤地基路基的振動檯模型試驗,試驗測試瞭不同位置的孔壓,對孔壓的時程、分佈特點和孔壓比的變化進行瞭分析。水平加速度為0.3 g時,路隄坡腳以外地基產生液化,而路隄範圍內未齣現液化。採用碎石樁複閤地基加固鐵路液化地基時,需適噹加寬加固地基的寬度。
이옥몽철로쇄석장가고처리로제액화지기위공정배경,채용수평진동모의지진하재진행료쇄석장복합지기로기적진동태모형시험,시험측시료불동위치적공압,대공압적시정、분포특점화공압비적변화진행료분석。수평가속도위0.3 g시,로제파각이외지기산생액화,이로제범위내미출현액화。채용쇄석장복합지기가고철로액화지기시,수괄당가관가고지기적관도。
As the case of the liquefied foundation consolidated with gravel pile along Yuxi-Mengzi Railway, shaking table model test for the subgrade with gravel pile composite foundation is carried out through simulating seismic load by horizontal vibration, in which the pore pressures at different positions are tested as well as the time interval, distribution characteristics and change of pore pressure ratio are analyzed. When the horizontal acceleration is 0. 3g, the foundation outside the toe of the embankment is liquefied while that inside the range of embankment is not. Where liquefied foundation of railway is consolidated with gravel pile composite foundation, the width of the foundation needs to be widened and reinforced.
