空间加载与面波技术在桥梁桩基试验分析中的应用

Application of Space Loading and Surface Wave Technique in Bridge Pile Base Test Analysis

某桥上部钢筋混凝土空心板水害严重,已出现严重的单板受力现象,个别跨在跨中虽采取了支护措施,但已初步鉴定为危桥。根据改建计划,该道路将按公路Ⅰ级标准改建,即上部结构将拆除重建。为节省投资,上部结构重建时要最大限度地利用下部结构。为此,采用空间加载体系与瞬态面波技术对下部桩柱进行了试验分析,为下部结构可否进一步使用提出了科学依据。该试验分析方法对其他桥梁结构分析具有一定的指导意义。

One bridge is serious in water damage for upper steel reinforced concrete hollow slab,having causing serious single beam bearing. Though taking support measure at the middle of some spans, the bridge is identified as the dangerous one. According to reconstruction plan, the highway is rebuilt as the highway Ⅰ class, that is to rebuild the upper structure. In order to save investment, it should make full use of substructure while rebuilding the upper structure. Givem this, space loading system and transient surface wave are adopted analyze the lower piles, providing scientific reference whether utilizing the lower structure or not. This test method has a certain of directing significance for analyzing other types of bridge structures.