动态设计在云桂铁路路基岩溶整治中的应用

Application of the Dynamic Design in Karst Remediation of Yunnan to Guangxi Railway

岩溶发育受地形地貌、地质条件、水动力条件、气候条件控制,形态各异、极不规律。为确保铁路施工及运营安全,岩溶整治措施必须具有针对性,但施工之前开展大规模、高密度的钻探和物探等综合勘探手段查明每一段岩溶的详细发育情况是不现实的,故有必要利用施工中的开挖、钻孔等措施验证前期的勘探,开展动态设计、动态施工。文章以云桂铁路岩溶整治采取动态设计、探灌结合的方案为例,总结了一整套岩溶动态设计、动态施工的实施细则,该细则明确了参建各方的职责和作业流程,可有效的控制施工质量和投资,降低工程风险。该实施细则已被成都铁路局、昆明铁路局等建设管理单位推广应用。

Karst development, affected by landform, geological conditions, hydrodynamic condition, the climatic condi-tions, has various shapes and be very irregular. In order to ensure the safety of construction and operation, the karst re- mediation measures must be pertinent, however, it is unpractical to find out the detailed development conditions of the karst in each section by carrying out large-scale and high-density drilling and geophysical prospecting before construc- tion. It is necessary to use excavation, drilling holes and other measures to validate previous explorations, and to carry out the dynamic design and construction. Taken Yunnan to Guangxi railway adopting dynamic design and the combina- tion of exploration and irrigation, it is concluded a whole set of implementation rules of the dynamic design and construc- tion of the karst. The rules specify responsibilities of each party and work flow which could control the construction qual- ity and investment efficiently as well as bring down the engineering risk. The ruleshave been popularized and annlied by Chengdu Railway Bureau, Kunming Railway Bureau and other construction management units.