2) 产生沉降的各层压缩量与时间的关系曲线，即每层的时间——荷载——压缩量曲线。
For every layer that caused, the settlement compression value-time relationship curve, that means every layer time-load-compression curve. 3) 绘制每个观测标志点的?sn——?sn?sn曲线
the ?sn——?sn?sncurve of every observation symbol point
0.450.40.350.30.250.20.150.10.05000.050.10.150.20.250.30.350.40.45系列1系列2
图4 ?sn＋1——?sn?sn＋1曲线 （?sn为横坐标，?sn?sn＋1纵坐标） Drawing 4 ?sn——?sn?sn curve (?snis the abscissa, ?sn?sn＋1 is the
vertical coordinate)
sn为时间段每n天的沉降值，降标准曲线，曲线示意如图4。
?sn为时间段每n天沉降值的累计值，在同一图上绘有沉
sn is the time section that means every n days the settlement, ?sn is the time section that means every n days the settlement accumulated value), in the same drawing it shall be drawn the settlement standard curve, the curve see the drawing 4.
（3） 对沉降观测资料及时分析，尤其是在预压期，应对路基沉降的发展趋
势进行分析，分析意见及时报郑西公司和咨询项目部，以便在必要时采取补救措施。
the settlement observation data shall be analyzed in time, especially for the preloading period, it shall be analyzed the subgrade settlement developed trend, the comments shall be delivered to the Zheng-Xi Company and
日期：2007-01-09 Date:2007-01-09
翻译： Translated by:
芦丽萍，王瑾，朱荣，巩亚强 Sophy, Vivian, Michelle, Simon
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Page 16 of 85 consultancy department, when necessary it can be used the remediation treatment for the preloading
2、路基评估工作应根据下列资料综合分析：the subgrade assessment shall follow the following data to analyze:
（1） 路基沉降观测资料。The subgrade settlement observation data （2） 路基地段的线路设计纵断面图、工程地质纵横断面图、设计图纸和说明书、沉降计算报告(包括不同阶段的设计沉降值与时间的关系曲线)等相关设计资料。The longitudinal drawing of the subgrade section alignment, the geological longitudinal and cross section drawing, design drawing and design document, settlement calculation report (contain the relationship curve between the designed settlement value and time of different stage) etc relevant design data.
（3） 施工过程、施工核查以及填料、级配、地基和压实检验情况等施工资料。Construction procedure, construction check and filling, gradated, foundation and compaction inspection situation etc construction data. （4） 施工质量控制过程和抽检情况等监理资料。Construction quality control procedure and sample inspection situation etc supervision data. 3、评估分析方法 evaluation analysis method
（1） 路基沉降预测应采用曲线回归法，常用方法有：双曲线法、固结度对
数配合法（三点法）、抛物线法、指数曲线法、 修正指数曲线法、沉降速率法、 星野法、 泊松曲线法等曲线拟合方法推算工后沉降（详见附件二《路基沉降常用预测方法》）。黄土地区沉降曲线适合用何种方法推算工后沉降，需要在路基沉降预测时具体分析研究。 the subgrade settlement forecast shall be used curvilinear regression method, generally methods are: hyperbolic curve method, consolidation logarithmic cooperation method (three-point method), parabolic method, exponent curve method, modified exponent curve method, settlement speed method, Xingye method, Poisson curve method etc curve fitting method to estimate the after work settlement (see the attached Subgrade Settlement General Forecast Method). For the loess area, which method shall be used
日期：2007-01-09 Date:2007-01-09
翻译： Translated by: 芦丽萍，王瑾，朱荣，巩亚强 Sophy, Vivian, Michelle, Simon 审核 proofread
Page 17 of 85 for estimate the after work settlement, when forecast the subgrade settlement it need to analyze and research.
（2） 路基沉降预测曲线回归法应满足以下要求：the subgrade settlement
forecast curvilinear regression method shall satisfy the following requirement:
? 根据路基填筑完成或堆载预压后不少于3个月的实际观测数据作多种曲线的回归分析，确定沉降变形的趋势，曲线回归的相关系数不应低于0.92； ? According to the more than 3 months actual observed data after subgrade filled or preloading, it can do the curvilinear regression analysis of many kinds of curves to ensure the settlement deformation trend. The related coefficient of the curvilinear regression is no less than 0.92.
? 沉降预测的可靠性应经过验证，间隔不少于3个月的两次预测最终沉降的差值不应大于8 mm；
? The reliability of the settlement forecast shall be checked, the different value of the two times, which the interval is more than 3 months, forecasted the final settlement can not larger than 8mm.
（3） 路基填筑完成或堆载预压后，最终的沉降预测时间应满足下列条件：
after finished the subgrade filled or preloading, the final settlement forecasted time shall satisfy the following condition:
s(t)/s(t=∞)≥75%
式中 s(t)——预测时的沉降观测值；when forecast, this
is the settlement observed value
s(t=∞)——预测的最终沉降值。The forecasted final
settlement value
注：沉降和时间以路基填筑完成或堆载预压后为起始点。 Remark: for the settlement and time, after the subgrade filled or
preloading as the start point.
（4） 设计沉降计算总沉降量与通过实测资料预测的总沉降量之差值不宜大
于10mm。
the difference between the designed settlement calculated total settlement
日期：2007-01-09 Date:2007-01-09
翻译： Translated by:
芦丽萍，王瑾，朱荣，巩亚强 Sophy, Vivian, Michelle, Simon
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Page 18 of 85 and forecasted total settlement that used the actual measured data is unadvisable larger than 10mm.
（5） 路基填筑完成或施加预压荷载后应有不少于6个月的观测和调整期，
持续沉降观测不少于6个月的时间，根据这6个月以上的监测数据，绘制“时间-沉降量\曲线，按实测沉降数据推算分析并推算总沉降量、工后沉降值，初步确定铺轨时间。观测数据不足以评估或工后沉降评估不能满足设计要求时，应继续观测或采取必要的加速或控制沉降的措施。
After filled the subgrade or preloading, it shall have more than 6 months observation and adjustment period, the continuously settlement observation is more than 6 months. According to the observation data up to 6 months, it shall be drawn the time-settlement curve. According to the actual settlement data analysis to calculate the total settlement, after work settlement, and it shall be primarily determined the time to install the slab track. When the observed data is not sufficient to assess or the after work settlement can not satisfy the design requirement, it shall continuously observe or adopt measure to increase or control the settlement
（6） 在3个月后进行第一次预测，根据3个月的监测数据，绘制“时间-沉降
量\曲线，按实测沉降数据初步预测6月的沉降量及剩余沉降量，以决定运架梁的时间。
After 3months it shall be forecasted for the first time. According to the 3 months supervision data, it shall be drawn the time-settlement curve, according to the actual settlement data, it shall be primary forecasted the 6 months settlement and the residential settlement to determine the time for launching girder. It is allowed to improve the forecast according to the farther settlement observation data.
（7） 当推算的工后沉降值满足评估标准时，才能铺设无碴轨道。当沉降分
析结果表明无碴轨道不能在计划的工期铺设时，则要研究确定是延长路基摆放时间，还是采取调整预压土高度、调整预压土卸荷时间、增加地基加固等工程措施。
when the calculated after work settlement can satisfy the assessment
日期：2007-01-09 Date:2007-01-09
翻译： Translated by:
芦丽萍，王瑾，朱荣，巩亚强 Sophy, Vivian, Michelle, Simon
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Page 19 of 85 standard, it can be installed the slab track. When the settlement analysis result shown that the slab track can not be installed in the planned work time, it shall discuss to ensure whether extend the subgrade preloading time or adjust the height of preloading, adjust the unloading time, increase the foundation treatment etc. measures. 3、评估标准the evaluation standard
（1） 根据实测沉降观测资料推算的路基工后沉降量不超过扣件允许的沉降
调高量15mm；
according to the actual settlement observation data, that calculated the subgrade after work settlement is not exceed the fastener allowed settlement adjusted value 15mm.
（2） 沉降比较均匀的路基，推算最大工后沉降量不超过30mm，并且调整
2轨面高程后圆顺的竖曲线半径应不小于0.4Vsj（
Vsj为设计最高速度，
km/h）；
for the subgrade that the settlement is more uniform, the calculated maximum after work settlement can not exceed 30mm, and also after adjusted the rail elevation the smoothly vertical radius is no less than 0.4
Vsj2 (
Vsjis the designed maximum speed, km/h)
（3） 路桥或路隧交界处的差异沉降不应大于5mm，过渡段沉降造成的路基
与桥梁或隧道的折角不应大于1/1000 。
The differentia settlement of the subgrade-bridge or subgrade-tunnel is less than 5mm,
the subgrade-bridge or subgrade-tunnel angle caused by the transition section settlement is less than 1/1000
五、 桥梁 Bridge
（一） 一般规定 General requirement
1. 无碴轨道铺设前，应对桥涵变形作系统的评估，确认桥涵基础沉降和梁体
长期变形等符合设计要求。
Before constructing slab track, systemic evaluation must be carried out on structure deformation to confirm that structure foundation settlement and long-term deformation of superstructure can satisfy design requirements.
日期：2007-01-09 Date:2007-01-09
翻译： Translated by:
芦丽萍，王瑾，朱荣，巩亚强 Sophy, Vivian, Michelle, Simon
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Page 20 of 85