本文研究具有软弱下卧层的地基极限承载力问题。
This paper deals with the ultimate bearing capacity of a foundation with soft clay underlying layer.
提出竖井未打穿软土地基下卧层固结度简化计算方法。
A simplified method for consolidation analysis on soft clay foundation with partially penetrated vertical drains under instantaneous preloading is developed.
当桩端未加固土层以下有软弱下卧层时，应对其进行软弱下卧层验算；
When there is weak underlying stratum bellowed the soil which is not be reinforced, the weak underlying stratum should be taken checking computations.
对复合地基承载力、下卧层承载力、网材强度停止验算，后果亦满足要求。
Under of composite foundation bearing capacity, capacity, nets material lie layer link, strength the results were also meet the requirements.
三组室内模型试验表明具有软弱下卧层的地基破坏模型基本上属于冲切破坏。
Three sets of model test in laboratory show that the failure model in the foundation with soft clay underlying layer belongs basically to the punching shear failure.
推导出具有软弱下卧层土矩形基础的直接计算公式，编制了相应的计算机程序。
The direct calculation formulas of the rectangular foundation containing weak underlying stratum are induced and a computer program is developed.
采用有限单元法对不同筏板刚度下桩筏基础下卧层附加应力的分布规律进行分析。
By finite element method, the distributions of additional stress of piled raft foundations in different raft rigidities are analyzed.
此外，根据实际的地基结构，建立了桩间土和下卧层的固结模型并分别进行求解分析。
Furthermore, according to the practical foundation shapes, the consolidation models of the soil between piles and the substratum are built and solved respectively.
由于基槽开挖对下卧层残积土的强烈扰动导致强度丧失，造成承台在自重下明显沉降。
The loss of strength due to the strong disturbance of underlaying residual soil by the excavation of foundation trench shall cause obvious settlement of cushion cap with its gravity.
分层沉降观测结果表明，复合地基的主要压缩变形发生在加固区底部和下卧层顶部的一定范围。
According to the settlement in different depth, major compressive deformation develops in area nearby stabilized layer bottom.
除弹性理论法外，其它常用的设计和分析方法几乎都没有考虑筏板刚度对下卧层沉降的调节作用。
The raft rigidity directly affected by the dimensions of the board, however, were neglected in the traditional analyzing of substratum settlement except of the elasticity theory method.
搅拌桩地基沉降计算的准确性取决于搅拌桩复合地基中附加应力的分布，特别是下卧层应力的分布。
The accuracy of settlement calculation of composite foundation with mixing piles depends on the additional stress distribution in the foundation, especially in the subjacent bed.
根据健筑地基基础设计规范中的相关规定，导出了可以直接满足软弱下卧层承载力要求的基础底面积计算的简便方法。
According to the rules in foundation Design Standand of Building Ground, a reduced calculation method which can directly figure out the demanded foundation area is introduced.
研究认为粉喷桩的存在对地基加固区土体的孔压值影响较大，而在地基下卧层有无粉喷桩或排水板对土体孔压影响都很大。
The conclusion shows that DJM has more influence on the pore water pressure of the upper soil, and PVD and DJM both have more influence on the lower soil.
通过对加固区和下卧层的应力计算分析，揭示了粉喷桩复合地基的附加应力场的分布特性，说明所采用的计算方法是合理可行的。
The stress field of the reinforced area and the underlying stratum was calculated and the distribution characteristics of the additional stress field of DJMP...
大量桩筏基础下存在较厚的饱和软弱下卧层，其变形和内力的研究不仅涉及到筏板、桩和土三者之间的相互作用，而且还跟时间有很大的关系。
Research for the deformation and internal forces of piled raft foundation on a thick soft substratum are concerned with not only the interaction between pile, raft and soils but the also the time.
天然地基土承载力较高，但基础影响深度范围内存在软弱下卧层，不能满足设计要求的承载力和变形时，采用CFG桩法对软弱下卧层进行加固处理。
When natural soil, higher bearing capacity and soft substratum in influence depth, cannot satisfy the request of bearing capacity and deformation, CFG piles are adopted to strengthen soft substratum.
对设计中的基础承载力的确定、筏桩复合受力分析、下卧软土、持力层应力扩展、桩基施工等方面进行了较为详细的研讨。
Detailed study was done in the determination of base bearing capacity, raft stake composite stress analysis, auger ground, bearing stratum stress stretching and pile foundation construction.
对设计中的基础承载力的确定、筏桩复合受力分析、下卧软土、持力层应力扩展、桩基施工等方面进行了较为详细的研讨。
Detailed study was done in the determination of base bearing capacity, raft stake composite stress analysis, auger ground, bearing stratum stress stretching and pile foundation construction.
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