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一、概述随着基本建设的飞跃发展,高、重、大的建筑物愈来愈多,在松软土地区采用桩基方案的机会也愈来愈多。勘察工作对桩基的承载力,在有条件的地区,采用桩的静载荷试验来确定,一般只能沿用查规范的方法。可是桩载试验费时长、费钱多,且设计所需的单桩承载力数值,必须等施工单位(打桩队)进了现场后,才能取得。因而引起了勘察、设计、施工间的矛盾。如果勘察报告中能分层提出其摩擦阻力和端承阻力,就为设计提供了选择桩基持力层,确定桩长、桩的截面和采用单桩承载力的资料,使勘察更好地为设计和施工服务。
I. Overview With the rapid development of capital construction, there are more and more high, heavy, and large buildings. There are more and more opportunities to use pile foundations in soft soils. The carrying capacity of the pile foundation in the survey work is determined by the static load test of piles in the areas where conditions are met, and the method of survey and specification is generally used. However, the pile loading test takes a long time and costs a lot, and the design value of the single pile bearing capacity must be obtained after the construction unit (pile team) enters the site. As a result, conflicts between survey, design, and construction have arisen. If the frictional resistance and end-resistance resistance can be stratified in the survey report, the design provides a choice for the bearing capacity of the pile foundation, the determination of the length of the pile, the cross section of the pile and the use of the data of the bearing capacity of the single pile, so that the investigation is better. Design and construction services.