铁道标准设计
鐵道標準設計
철도표준설계
RAILWAY STANDARD DESIGN
2014年
3期
71-75,76
,共6页
高速铁路%采空区%群桩基础%数值模拟%沉降
高速鐵路%採空區%群樁基礎%數值模擬%沉降
고속철로%채공구%군장기출%수치모의%침강
high-speed railway%goaf area%pile group foundation%numerical simulation%settlement
通过对采空区桥梁群桩基础沉降进行数值模拟，分析采空区桩基在荷载作用下变形过程及特点，揭示不同工况下的基础变形规律。研究结果表明，基础沉降满足规范要求，沉降主要集中在浅层土地层中；桩间土与桩顶沉降均匀；采空巷道顶板的沉降与地基其他部位沉降基本一致，桩基能够有效限制采空巷道顶板的变形。
通過對採空區橋樑群樁基礎沉降進行數值模擬，分析採空區樁基在荷載作用下變形過程及特點，揭示不同工況下的基礎變形規律。研究結果錶明，基礎沉降滿足規範要求，沉降主要集中在淺層土地層中；樁間土與樁頂沉降均勻；採空巷道頂闆的沉降與地基其他部位沉降基本一緻，樁基能夠有效限製採空巷道頂闆的變形。
통과대채공구교량군장기출침강진행수치모의，분석채공구장기재하재작용하변형과정급특점，게시불동공황하적기출변형규률。연구결과표명，기출침강만족규범요구，침강주요집중재천층토지층중；장간토여장정침강균균；채공항도정판적침강여지기기타부위침강기본일치，장기능구유효한제채공항도정판적변형。
This paper established a numerical model to simulate the settlement of bridge pile group foundation in goaf area, and analyzed the deformation process and characteristics of pile foundation in goaf area;further, the different deformation rules under various engineering conditions were depicted in detail. The study result reveals that: ( a) the foundation settlement meets the requirement of standard code, and the settlement mostly occurs in the shallow soil layer;(b) the settlements of soils between and on the piles are uniform;(c) the settlement of the goaf roadway roof is basically the same as that of other parts of the foundation, and this proves that the pile foundation can effectively limit the deformation of the goaf roadway roof.
