CAJ | 학술논문

文章以天津武清翠亨路下穿京津城际和京沪铁路工程为背景，分别针对临近营业线高速铁路工程的防护设计、沉降变形评估技术进行了研究，采用三维有限元模型进行了基坑分层开挖和分层浇筑过程分析，对临近高速铁路工程的基坑开挖、结构浇筑施工等全过程进行了安全评估计算。研究表明，临近高速铁路工程应重点控制地下水位变化、基坑开挖卸载和结构浇注加载问题；采用高压旋喷桩进行全封闭止水设计，可避免基坑抽水或临近铁路降水对既有高速铁路沉降影响，并有效减小基坑施工和结构加载对临近铁路所产生的变形影响，保证实测高速铁路变形满足规范要求；建模分析与实测数据的对比证明了所采用评估方法准确、可行。
문장이천진무청취형로하천경진성제화경호철로공정위배경，분별침대림근영업선고속철로공정적방호설계、침강변형평고기술진행료연구，채용삼유유한원모형진행료기갱분층개알화분층요축과정분석，대림근고속철로공정적기갱개알、결구요축시공등전과정진행료안전평고계산。연구표명，림근고속철로공정응중점공제지하수위변화、기갱개알사재화결구요주가재문제；채용고압선분장진행전봉폐지수설계，가피면기갱추수혹림근철로강수대기유고속철로침강영향，병유효감소기갱시공화결구가재대림근철로소산생적변형영향，보증실측고속철로변형만족규범요구；건모분석여실측수거적대비증명료소채용평고방법준학、가행。
In this paper, on the background of Cuiheng Road in Wuqing under passing Beijing-Tianjin intercity railway and Beijing-Shanghai railway, research on protective design and subsidence evaluation technology for high speed railway engineering is performed, process analysis for stratified excavation and casting of foundation pit by adopting three-dimen-sional finite element model are done,and safety assessment calculations for whole process of excavation, structure pou-ring and construction of foundation pit near high-speed railway are carried out. Studies have shown that:the engineering near the high-speed railway should focus on controlling the water table changes, problems of foundation pit excavation unloading and structure casting loading;the closed sealing design by using high pressure jet grouting pile can avoid the impact of the pumping of pit or precipitation near the railway to the settlement of existing high-speed railway, effectively reduce the deformation of adjacent railway affected by foundation pit construction and structure loading and ensure that high-speed railway deformation measured meets code requirements. Comparison between modeling analysis and the measured data proves that this assessment method is accurate and feasible.