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1)  soft soil area
软土地区
1.
Analysis on pile foundation technology of multistory building in soft soil area
软土地区多层建筑的桩基设计技术分析
2.
Through one district project design practice,it makes the analysis and appraisal to get the compositing pile foundation design by using settlement control methods in soft soil area,discusses the common action principles of pile,soil,and cushion cap,to supply reference to the design of pile foundation in similar area after.
通过某一小区工程设计实例,对在软土地区用沉降控制方法进行复合桩基础设计进行了分析和评价,探讨了桩、土和承台共同作用的机理,以便今后在同类地区进行桩基设计时参考借鉴。
3.
The paper desribes how to choose a reasonable supporting design and earth excavation plan for garanteeing not only safety and reasonable,but also ecenomic construction,com- bined with enginening practice,some problems in foundation pit supporting and earth excavation process in soft soil area are analysed and a lot of beneficial results h.
本文结合工程实例对软土地区基坑支护及土方开挖过程中出现的一些问题进行了初步的分析并得出一些有益的结论。
2)  soft clay area
软土地区
1.
The analysis shows that,the super-long piles in the soft clay area behave as typical friction piles,with the vertical bearing capacity being supplied mainly by side friction resistance, and that buckling stability analysis and s.
以洞庭湖软土地区某特大拱桥主墩桩基础为工程依托 ,进行了一试桩竖向静载荷试验 ,并基于所获得的现场实测数据探讨了软土地区大直径超长灌注桩的荷载传递机理和竖向承载特性。
2.
Environment effect and harm are introduced for deep foundation excavation in soft clay area.
简要介绍软土地区深基坑开挖对周围环境引起的影响和危害 ,并提出了相应的环境保护原则和方法 ,为软土地区深基坑工程的设计和施工提供有益的借
3.
In this paper, based on the experiment results, the characteristics of strength change of the soil in passive area and the effect of its retaining on the strength during excavation of foundation pit in soft clay area were analyzed.
以试验为基础 ,分析了软土地区深基坑开挖时 ,坑底被动区土体强度变化特征及坑底土体卸荷后滞留对其强度的影响。
3)  soft soil region
软土地区
1.
Design for deep excavation retaining in soft soil region;
软土地区深基坑支护设计分析
2.
How to control and deal with the displacement in soft soil region has become a very important problem.
软土地区深基坑的变形控制和治理问题已经成了目前岩土工程中的一个热点课题。
4)  soft soil
软土地区
1.
According to the factual data,the problem of soft soil settlement in the process of constructing the freeway is simulated with FLAC~(3D).
运用FLAC~(3D)数值模拟软件,结合实际监测资料,模拟了高速公路修建过程中软土的沉降问题,模拟结果与实际监测资料基本吻合,对于在软土地区修建高等级公路及相关问题的研究具有积极意义。
2.
In this paper, a computation method for retaining structure of deep excavation in soft soil considering construction steps is put forward.
本文结合上海深大基坑丰富的实测资料,对传统的计算理论进行了改进,提出了考虑施工工况的软土地区深基坑围护结构计算方法,使之更具工程价值。
5)  soft clay region
软粘土地区
6)  the soft soil layers in Nanjing
南京软土地区
1.
Owing to the fact that it is the first time to be constructed in the soft soil layers in Nanjing,its construction techniques and technical measures must be summarized and consummated.
但在南京软土地区,由于应用时间较短,施工工艺及相关的技术措施尚需进一步总结和完善。
补充资料:软土地区筑路
      软土系指近代水下沉积的饱和粘性土,其天然含水量接近或大于液限、孔隙比接近或大于 1、渗透系数接近或小于10-6厘米/秒。软土地层的压缩性大、抗剪强度低。在软土地区修筑的路堤将发生长期缓慢的下沉。在下沉过程中软土逐渐发生一定程度的固结,强度逐渐提高,但其固结过程相当长,如果在短期内填筑路堤的高度超过软土地基所能承受的极限高度时,路堤将丧失稳定而发生坍滑。
  
  软土地基上的路堤极限高度约为5.14C/γ,式中C为软土的粘聚力,γ为容重。当需要修筑的路堤高度大于极限高度时,必须采取措施以保证基底稳定。稳定措施的选择,应根据软土成因类型、物理力学性质、层厚及其成层情况、路堤高度、施工期限以及机具材料等具体条件,进行分析比较决定。可供选择的措施有:换土(见换土法、抛石挤淤、爆破排淤、砂井、反压护道等。
  
  砂井(见预压法)是按一定间距作孔、孔内灌砂以形成砂井,配合分阶段加荷预压,以达到缩短渗流途径加速地基固结的有效措施。在软土深厚,路堤较高而施工期间又较紧迫,采用其他简易加固方法不能满足设计要求时,常采用砂井。
  
  反压护道是在路堤两侧填筑适当厚度与宽度的护道,利用护道的重量以平衡地基受压后向两侧挤出和隆起的趋势。当需要修筑的路堤高度大于极限高度不多时(一般不大于极限高度的1卭倍),可以采用。
  

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