| 1. | Pile group effect of main pylon foundation of sutong bridge
苏通大桥主塔墩基础群桩效应研究 |
| 2. | Safety monitoring model for extruding effect and group effect of precast piles
考虑挤土和群桩效应的预制桩安全监控模型 |
| 3. | Efficiency of pile groups
深基础群桩效应 |
| 4. | In the engineering the static load test usually is used to determine the bearing capacity of composite foundation , but the relative specifications in the " the criterion of building foundation treatment ( jgj79 - 91 ) " are not so clear
分析表明群桩复合地基具有群桩效应问题，其性状与单桩复合地基有很大的不同。 |
| 5. | At the same time , some different coefficients of pile group effect are adopted to calculate . compared with these results , the feasibility and conciseness of this reduced coefficient are testified
同时本文还采用了不同的群桩效应系数对该群桩基础进行了计算，并将这些计算结果进行对照分析，证明了本文给出的折减系数的可行性和简便性。 |
| 6. | Because the pile group effect exists , the coefficients of earth pressure to the back piles reduce . p - y curve of pile group can be obtained by p - y curve of a single pile multiplied by a reduced coefficient
由于群桩效应的存在，后排桩的桩前土反力系数减小，这样群桩的抗力曲线( p - y曲线)就可通过在单桩的p - y曲线的基础上乘以一折减系数来获得。 |
| 7. | The effects of pile group are analyzed with the plane strain fem , the results of which show great consistency with the monitoring data . thus , conclusion is drawn that the predicted settlement of ground surface is reasonable and correct
进行了平面应变有限元群桩效应分析，得到的变形规律与实测情况符合较好，预测的地面沉降精度较高，工后沉降满足工程要求。 |
| 8. | Some conclusions relating to the displacement group effect are obtained from simulating the influence of several factors . the results prove that the model can consider both the effect of clusters piles and the ratio of loading share of each pile
通过大量的模型计算，讨论了桩距、桩数、桩径和桩长对群桩效应的影响，还研究了群桩中各桩受力的不均性，得出了一些有益的结论。 |
| 9. | Starting from the effect of group piles in the composite foundation , the size effect in the load test of large area composite foundation , composite foundation of single row piles and composite foundation of double rows piles are researched through fem analysis
本文从复合地基具有群桩效应现象入手，利用有限元来研究大面积复合地基、单排群桩复合地基、双排群桩复合地基荷载试验的尺寸效应问题，并用现场荷载试验实例来验证本文分析方法的可行性。 |
| 10. | Based on the formula which is used to compute the lateral resistance of single pile deduced by wang qitong , a formula is setup whose precondition is that the pile and the lateral soil directly around the pile deform in - phase . on the basis of that the contact stress of the foundation is equal , a formula that can be used to conform the stress - ratio of the composite ground is set up , on the same time , the principles of the deformation harmony of the soil and the piles in the composite ground are also discussed . combining with results of this test , a formula which can calculate the bearing capacity that considering the effect of group piles of the composite ground is also deduced
视搅拌桩桩体为均质弹性介质，推导了复合地基中单桩有效桩长的理论计算公式；根据王启铜柔性桩桩侧摩阻力计算公式，以桩侧土与桩体协调位移为前提推导了柔性桩桩侧摩阻力的计算公式；以基底接触应力均匀分布，桩体、桩间土均质为前提，讨论了桩，土协同工作原理，从而得出复合地基桩、土荷载变形特性，以及桩、土应力比计算公式；结合本次试验，通过计算加载时桩体与土体的荷载分担情况以及在极限状态下桩土承载力发挥值，提出考虑群桩效应的搅拌桩复合地基承载力计算公式。 |
