铁道标准设计
鐵道標準設計
철도표준설계
RAILWAY STANDARD DESIGN
2015年
5期
28-31,32
,共5页
真空预压%软土地基%加固
真空預壓%軟土地基%加固
진공예압%연토지기%가고
Vacuum preloading%Soft foundation%Reinforcement
真空预压是软土地基加固处理的一种方法，结合京沪高速铁路上海虹桥枢纽工程的深厚软土地基加固处理与沉降控制资料，介绍采用真空预压加固的虹桥动车运用所软基的一个试验段施打排水板引起的沉降、地基表面沉降以及孔隙水压力的现场观测和试验，并对观测结果进行了分析。最后，结合现场测试数据，采用数值计算方法对地基加固措施的受力特性和沉降变形规律进行分析，得到的沉降量与实测沉降推算结果较接近。
真空預壓是軟土地基加固處理的一種方法，結閤京滬高速鐵路上海虹橋樞紐工程的深厚軟土地基加固處理與沉降控製資料，介紹採用真空預壓加固的虹橋動車運用所軟基的一箇試驗段施打排水闆引起的沉降、地基錶麵沉降以及孔隙水壓力的現場觀測和試驗，併對觀測結果進行瞭分析。最後，結閤現場測試數據，採用數值計算方法對地基加固措施的受力特性和沉降變形規律進行分析，得到的沉降量與實測沉降推算結果較接近。
진공예압시연토지기가고처리적일충방법，결합경호고속철로상해홍교추뉴공정적심후연토지기가고처리여침강공제자료，개소채용진공예압가고적홍교동차운용소연기적일개시험단시타배수판인기적침강、지기표면침강이급공극수압력적현장관측화시험，병대관측결과진행료분석。최후，결합현장측시수거，채용수치계산방법대지기가고조시적수력특성화침강변형규률진행분석，득도적침강량여실측침강추산결과교접근。
Vacuum preloading is a method to treat soft foundation. With reference to the data of soft soil foundation reinforcement and settlement control from Shanghai Hongqiao hub project on Beijing-Shanghai high-speed railway, this paper introduces the test section of Hongqiao soft foundation where settlement is caused by placing draining board in the process of vacuum preloading reinforcement, and on-site observation and tests of ground surface settlement and pore water pressure are conducted And the results of observation are analyzed. Finally, the mechanical characteristics and the rule of the settlement of foundation reinforcing measures are analyzed with numerical calculation method based on field test data, and the calculated settlement is close to the measured result.
