1) long-term surface settlement
地表长期沉降
1.
Influence of partial drainage of linings on long-term surface settlement over tunnels in soft soils;
衬砌局部渗流对软土隧道地表长期沉降的影响研究
2) Long-term settlement
长期沉降
1.
Study on long-term settlement behavior of driven pile foundation in Shanghai soft soil area;
上海软土地区打入桩基长期沉降性状研究
2.
Method for long-term settlement prediction of pile-foundation in consideration of time effect of stress–strain relationship;
考虑应力应变时间效应的桩基长期沉降计算方法
3.
Based on long-term settlement monitoring data of bored pile foundations in 26 high-rise buildings in Shanghai,analysis is made on the effects of the types of pile toe bearing strata,sand layer depth ratios in compressible layers under pile tip and soil properties surrounding the pile shaft on the long-term settlement characteristics of bored pile foundations.
结合上海地区26栋高层建筑钻孔桩基长期沉降观测资料,分析桩端持力层的种类、桩端压缩层中砂土比、桩周土层特性等因素对钻孔桩基长期沉降特性的影响,结果表明,桩基持力层的选择和压缩层内的砂土比对桩基沉降有较大影响,钻孔桩沉降受桩周土的影响明显小于打入桩基础。
3) Surface subsidence
地表沉降
1.
Forecast and analysis of surface subsidence of metro tunnel construction in mucky ground;
淤泥质地层地铁隧道施工地表沉降预测及分析
2.
Analysis & statistics of surface subsidence of hidden-digging station construction in Beijing Subway;
北京地铁暗挖车站施工地表沉降统计及分析
3.
Finite element analysis of surface subsidence displacement in recovery blocks;
开采区块地表沉降位移的有限元分析
4) ground surface settlement
地表沉降
1.
Numerical analysis of deformation and ground surface settlement of overlying road caused by exploiting;
开采引起上覆公路地表沉降与变形的数值分析
2.
Improved the same dimension grey recurrence model for ground surface settlement prediction in tunnel
隧道地表沉降预测的改进等维灰数递补模型
3.
According to such the characteristics as shallow embedment and large span of Furongshan tunnel and through a large number of monitors for the ground surface settlement,its entire process curves and the deformation curves changed with time at the measured points are drawn out.
针对芙蓉山隧道具有浅埋、大跨度的特点,通过大量的地表沉降现场监测,绘出其全过程曲线以及各测点变形量随时间变化曲线,验证了地表控制隧道洞口稳定性的重要性;并通过对不同变化曲线进行分析,对隧道洞体的稳定性进行预判,指导施工。
5) ground settlement
地表沉降
1.
Analysis on ground settlement caused by shallow-buried sub-surface excavated tunnel construction and its countermeasures;
浅埋暗挖隧道施工引起的地表沉降分析与对策
2.
Analysis and calculation of ground settlement around foundation pit in deep excavation;
深基坑开挖坑外地表沉降分析与计算
3.
Study on structure design and ground settlement in deep foundation pit based on artificial neural networks;
基于神经网络深基坑桩排支护及地表沉降研究
6) ground subsidence
地表沉降
1.
Numerical analysis on ground subsidence in connection section of Baishiqiao subway station;
白石桥车站渡线地表沉降的数值分析
2.
Construction of urban metro is becoming a hot issue in China,therefore,the prediction and control of ground subsidence caused by metro construction need special attention.
城市修建地铁所引起的地表沉降已经成为重要的研究课题,为合理评价黄土地区不同施工方法对城市地铁开挖引起地表沉降的影响,依托西安地铁修建工程实际,对在黄土地层中开挖地铁隧道引起的地表沉降进行离心模型试验,模型试验比率为1∶60,模型箱尺寸为700mm×500mm×360mm,试验对正台阶法、全断面法、双侧壁导坑法和中隔壁法4种不同的城市地铁施工方法的试验结果进行对比分析;结果表明,黄土地区地层开挖地铁隧道所引起的地表沉降以主固结沉降为主,全断面法是控制黄土地质地表沉降最有效的方法,试验结果为黄土地区城市地铁设计施工提供了可靠依据。
3.
For example,the probability distributions of the maximum ground subsidence and the vault settlement appear to be approximately normal ones.
同时还得到几点地层变形规律,如:最大地表沉降和拱顶下沉值的概率分布近似成正态分布;随着围岩稳定性由好变坏,地表沉降和拱顶下沉值也呈逐渐增大的趋势;隧道跨度为5～10m时,II,III,V类围岩条件下的最大地表沉降值与上覆土层厚度关系呈凸形状,II,III类围岩的最大拱顶沉降值在埋深25m范围内随隧道埋深增大而增大;拱顶沉降与地表沉降比值多为0。
补充资料：地表沉降观测
| 地表沉降观测 ground settlement observation 测定地面高程随时间变化的工作。地壳运动、开采矿藏或天然气、抽取地下水等均能引起地面高程变化。局部地区地面高程在短期内发生较大变化，对房屋、地下管道、道路、桥梁和水坝等有严重的破坏作用。城市和工业区地面的持续下沉甚至危及整个城市和工业区的安全。地表沉降观测可以定量地了解地面的升降。进行地表沉降观测，要在测区内选定适量的水准点作为地面观测点，并埋设标志，同时在沉降范围外的稳定处设置适量的基准点，也可把基准点设在沉降范围内，但必须设法使基准点高程不受地表沉降影响。在一个测区内至少要设置3个基准点 ，以便通过联测验证其稳定性。从基准点出发用精密水准测量方法测定各观测点的高程。不同日期两次测得同一观测点的高程之差，即代表地面高程在这两次观测期间的变化。根据大量的地表沉降观测资料，可以分析沉降规律，预计沉降的发展趋势。
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参考词条