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1)  land extrusion
挤土
1.
The land extrusion extent has much sonething to do with pilelength,pile type and the speed rate & the sequence of the piling work as well as the total areas of the piles sectionand the distance from some particular points to the piles or between the piles.
预制桩打入时的挤土作用会使附近已打好的桩及原有建筑物或周围其他设施产生破坏。
2)  squeezing effect
挤土效应
1.
The influences of squeezing effect of static pressing tube pile on surrounding buildings and countermeasures;
静压管桩挤土效应对周边建筑物的影响与对策
2.
Prevention and cure of static pressure pre-stressed tubular pile s squeezing effect in soft foundation;
软土地基静压预应力管桩挤土效应的防治
3.
Finite element analysis with parametric variable of squeezing effect during pile driving;
沉桩挤土效应的参变量有限元分析
3)  compaction effect
挤土效应
1.
Construction technology of CFG pile treating highway soft base and pipe sinking compaction effect;
CFG桩处理公路软基施工工艺与沉管挤土效应
2.
Example analysis of compaction effect of static pressure pipe pile
静压管桩挤土效应实例分析
3.
This paper described such problems as the choosing of bearing layer,pile penetrating and its compaction effect,improving methods during the application of PHC pile in soft clay area in association with an engineering practice.
本文通过工程实例,介绍了静压PHC桩在福州软土地区的持力层选择与沉桩问题,挤土效应问题及防治对策。
4)  compacting displacement
挤土位移
1.
Finite element analysis of compacting displacements of single jacked pile;
静压单桩挤土位移的有限元分析
5)  displacement pile
挤土桩
1.
On time effect of bearing capacity of displacement pile with saturated cohesive soil;
饱和粘性土挤土桩承载力时间效应的探讨
2.
A finite element procedure ADINA coupled with the Biot s consolidation theory was worked out to calculate the dissipation of the excess pore pressure and the settlement of soil around the displacement pile after driving the pile.
基于比奥固结理论和ADINA有限元程序,分析了打桩完成后土中超孔隙水压力的消散和桩周土随时间固结沉降情况;然后结合荷载传递函数法,编制计算程序,对某一具体工程桩周土体重固结引起的在挤土桩上产生的负摩擦力及其时效性进行了研究。
3.
By analysis of the displacement mechanism of soil and pile near an installing displacement pile,we have derived the distribution regularity of deformation,shaft resistance and axial tensile force along the pile shaft.
通过对挤土桩施工过程中周围桩土位移的机理分析 ,导出了桩身变形、桩侧阻力和桩身轴力沿着桩长深度变化的规律 ,工程现场的实测结果与理论分析基本一致 。
6)  soil extrusion effect
挤土效应
1.
This article introduces the precautions in PHC pile construction such as the soil extrusion effect and the remedy for it,the ultimate effect and the interregna of checks for ground bearing capacity and the excavation of foundation pit etc;then it puts forward the remedies for the problems brought out.
文章介绍了预应力管桩施工中挤土效应及防治措施、时间效应及承载力检验的休止时间以及基坑开挖等预应力管桩施工时应注意的问题,并就此问题提出相关防治措施。
2.
This paper introduces the physical properties and construction features of PHC piles as well as the technical measures adopted in pile-sinking in order to reduce or eliminate the influence of the soil extrusion effect on the surrounding underground network and the surrounding buildings.
文章介绍了PH C预应力混凝土管桩(下称PH C管桩)的物理性能及施工特点以及在沉桩过程中为减少或消除挤土效应对周边地下管网或建筑物的影响所采取的技术措施,详细论述了某工程PH C管桩施工过程中各阶段所采取的技术措施,通过这些施工技术的实施,确保成桩质量,以保证工程的桩基合格。
补充资料:土桩挤密法
      按预定平面位置,采用沉管、冲击或爆破等方法成孔,然后在孔中填以素土(粘性土)或灰土,分层捣实,形成土桩。土桩与挤密后的桩间土组成复合地基,共同承受基础所传递的荷载。此法常用于处理湿陷性黄土地基、 杂填土地基和填土地基,处理深度一般为5~10米,最大处理深度可达15米以上。处理后的地基承载力一般提高50~100%。
  
  土桩(包括灰土桩)挤密地基的桩径、桩距和孔深通过试验求得。桩孔直径一般为30~50厘米,桩距(桩孔的中心距离S)约为桩孔直径的2~3倍,可按下式确定:
  
  
  
   式中d为土桩的设计直径;γd为地基挤密前,土的平均干容重;γ媁为地基挤密后,桩间土的平均干空重。
  
  桩孔宜按等边三角形的顶点布置。桩孔深度,可根据土中应力分布及下式确定:
  
  
  
  
    Pz+Pcz≤Ps式中Pz为土桩底标高处的附加压力;Pcz为土桩底标高处的土自重压力;Ps为土桩持力层土的湿陷起始压力或容许承载力。
  
  自50年代开始,中国应用土桩挤密法对西北地区某些建筑物的湿陷性黄土地基进行处理,获得了良好的技术经济效果。自70年代起,这种方法已用于民用建筑物的地基处理。用灰土桩挤密地基是60年代在土桩挤密法的基础上发展起来的,两者的作用和工艺、设备基本上相同。
  

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