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本规范包括单桩承载能力的静载和动载试验及桩身完整性检验。静载试验是利用堆载或锚桩反力装置通过液压千斤顶将荷载传递至桩上,并分级在加载方向使桩产生缓慢的等速位移O等速贯入(CRP)试验或等速上拔(CRU)试验1、动荷载试验是利用落锤或重物产生的瞬时荷载进行试验,常与打桩同时进行。桩身完整性检验,其目的在于发现单桩桩身是否完整和良好。该试验不提供单桩承载力。在静载试验中对桩可以竖向加压或拉伸,也可以水平向加载。桩可以垂直设置也可以设置成|斜桩|(见注释1、2、12和26)。一、定义单桩容许承载力,考虑了桩的极限承载力所需的最小安全系数,沉降、桩距、负摩擦力、
This specification includes static load and dynamic load tests and pile integrity tests for the bearing capacity of single piles. The static load test is to use a jacking or anchor pile reaction force device to transfer the load to the pile through hydraulic jacks, and grade in the loading direction to make the pile produce a slow constant velocity displacement O constant velocity penetration (CRP) test or pull up at constant speed. (CRU) Test 1. The dynamic load test is carried out using instantaneous loads generated by falling weights or weights, often at the same time as piling. The purpose of the pile integrity test is to find out if the single pile is complete and good. This test does not provide single pile bearing capacity. The pile can be vertically pressurized or stretched in a static load test and can also be loaded horizontally. Piles can be set vertically or as slanted piles (see notes 1, 2, 12 and 26). First, define the allowable bearing capacity of a single pile, consider the minimum safety factor required for the ultimate bearing capacity of the pile, settlement, pile spacing, negative friction,