中文摘要：

有限元素方法被执行在内在的弱把压成薄片的泥土上在横梁基础的适用的能力上调查横梁僵硬，基础宽度和垫子厚度的影响。在从包括忍受板的测试和基础解决观察的地测试的数字结果和结果之间的比较显示出合理同意。根据数字结果，横梁宽度，长度，生气的节和垫子，厚度被优化。结果证明在路基土壤的压力与增加垫子厚度和基础的宽度极大地减少。然而，基础解决和排水量的影响深度也在相对更薄的垫子厚度的条件下面相应地增加。为内在的弱层上的基础，仅仅增加基础宽度可能为改进适用的能力是不适当的，并且适当宽度和垫子厚度取决于路基的反应。在僵硬、灵活的横梁之间的比较也被讨论。路基上的一个灵活横梁基础的影响在装载条件的一样下面是相对更小的，并且灵活横梁基础对各种各样的路基显得更能适应。建议灵活横梁地基在工程被采用。根据计算结果， 2.4 m 的横梁宽度和 0.8 m 的垫子厚度被建议，并且一个灵活横梁基础在优化设计被使用，它被证实由实际工程合理。

英文摘要：

Finite element method was performed to investigate the influences of beam stiffness, foundation width and cushion thickness on the beating capacity of beam foundation on underlying weak laminated clay. The comparison between numerical results and results from field test including plate-bearing test and foundation settlement observation shows reasonable agreement. According to the numerical results, the beam width, length, cross section and cushion thickness were optimized. The results show that the stresses in subgrade soil decrease greatly with increasing the cushion thickness and width of foundation. However, the foundation settlement and influencing depth of displacement also increase correspondingly under conditions of relatively thinner cushion thickness. For the foundations on underlying weak layer, increasing foundation width merely might be inadequate for improving the bearing capacity, and the appropriate width and cushion thickness depend on the response of subgrade. A comparison between rigid and flexible beams was also discussed. The influence of a flexible beam foundation on subgrade is relatively smaller under the same loading conditions, and the flexible beam foundation appears more adaptable to various subgrades. The proposed flexible beam foundation was adopted in engineering. According to the calculation results, beam width of 2.4 m and cushion thickness of 0.8 m are proposed, and a flexible beam foundation is applied in the optimized design, which is confirmed reasonable by the actual engineering.