特殊地质区铁路桥涵特殊地基设计方案研究

特殊地质区段修建铁路桥涵，其基础需采取特殊处理措施，否则不但影响工程造价，而且影响桥涵的使用寿命和铁路的运营安全。此文以膨胀土和岩溶地质结构为例，针对其结构特性和实际桥涵工程，阐述膨胀土地质区段修建涵洞和岩溶地质区段修建桥梁的基础设计方案及采取的特殊处理措施。实践和检测结果验证，效果良好，满足相关规程规范的要求。

Research on Special Railway Bridge Foundation in Special Geological Area Design

Railway bridges foundation in special geology section needs to take special measures. Otherwise, it not only influence the project cost, but also affect the service life of the bridge and railway operation security. Therefiore, this article takes expansive soil and karst geological structure as an example, according to its structural characteristics and the actual bridge engineering, expounds the foundation design scheme and special treatment measures when building culverts in expansion land mass section and bridges at karst geological section. Practice and test results show that the effect is good and meets relevant regulations rules.