CAJ | 학술논문

通过总结工程实测资料，指出地下管线刚度较大时，管体与地层之间存在较大的差异沉降。地下管线整体变形与地层移动规律基本相同，隧道垂直下穿时，管体沉降曲线基本符合正态分布。对隧道工程地表沉降预测Peck公式进行修正，建立地下管线变形预测公式，结合已有地层损失率V1研究成果，计算得出管线降槽宽度参数Kp的参考取值。数值模拟结果表明，隧道水平下穿较垂直下穿引起的管线变形大，预测公式可初步评价水平下穿时管线的变形。刚性管线纵向拉应变预测公式也可做相应修正，以计算管线自身的变形。工程应用实例表明，相关修正公式预测结果与模拟计算和实测结果较为吻合，具有较强的实用性。
통과총결공정실측자료，지출지하관선강도교대시，관체여지층지간존재교대적차이침강。지하관선정체변형여지층이동규률기본상동，수도수직하천시，관체침강곡선기본부합정태분포。대수도공정지표침강예측Peck공식진행수정，건입지하관선변형예측공식，결합이유지층손실솔V1연구성과，계산득출관선강조관도삼수Kp적삼고취치。수치모의결과표명，수도수평하천교수직하천인기적관선변형대，예측공식가초보평개수평하천시관선적변형。강성관선종향랍응변예측공식야가주상응수정，이계산관선자신적변형。공정응용실례표명，상관수정공식예측결과여모의계산화실측결과교위문합，구유교강적실용성。
Through summarizing the monitoring results,it is pointed that when the pipeline rigidity is large,and the settlement between pipeline and formation is large. The general deformation law of underground pipeline is basically the same to the move of stratum. When the pipeline is vertical above the tunnel,the settlement curve fits to the normal distribution. The Peck formula for ground surface settlement prediction in tunnel engineering is corrected,and the pipeline settlement prediction formula is established. Combining the former research results of stratum loss rate V1 ,the reference value of pipeline settlement trough width parameter pK is calculated. The result of numerical simulation shows that the deformation of pipeline parallel above the tunnel is more than vertical above the tunnel , and the pipeline settlement prediction formula may preliminarily evaluate the deformation of pipeline parallel above the tunnel. The rigid pipeline longitudinal strain calculation formula may also be modified to get the pipeline deformation. The engineering application proves that the pipeline settlement prediction formula,numerical simulation and monitoring results are in good agreement,and the pipeline settlement prediction formula is good in application.