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一、试验概述大秦线郑重庄特大桥采用了新型的结构形式——钢筋混凝土连续刚架。考虑到大秦线是运煤专线,荷载大且偏心,桥址地质层次复杂,为确保大桥安全,铁道部有关部门决定对该桥作全面测试,其中包括地基系数试验。地基系数试验装置简图如图1。根据要求每个基坑做三点试验,每点为一次。每次试验,根据地基耐力的预估值,分为若干级(例如10级)。荷载加到某一级后
First, the test outline Daqin line Zhengzhuang Zhuang Bridge adopted a new type of structure - reinforced concrete continuous rigid frame. Taking into account the Daqin line is the coal feeder line, the load is large and eccentric, the site geological complexity of the bridge site, in order to ensure the safety of the bridge, the Ministry of Railways decided to make a comprehensive test of the bridge, including the foundation coefficient test. Foundation coefficient test device diagram shown in Figure 1. According to the requirements of each pit to do three tests, each point is once. Each test is divided into several levels (for example, level 10) based on the estimated value of foundation stamina. After the load is added to a certain level