We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
嵌岩深度对下伏溶洞桥梁桩基承载特性影响分析.
- Authors
武进广; 吴 南; 周宏伟
- Abstract
The embedded depth of the underlying karst cave under the pile foundation has a significant impact on the settlement, bearing capacity, and long-term stability of the pile foundation. Therefore, based on the construction project of the underlying karst cave pile foundation in a certain karst area bridge project, a numerical analysis model of karst cave pile foundation was established through Midas GTS. Based on the numerical analysis, the settlement of the pile top, the ultimate bearing capacity of the pile foundation, and the distribution of stress in the surrounding rock mass of the karst cave were obtained. Analysis was conducted on the embedded depth of pile foundations in karst areas and the bearing characteristics of underlying karst cave pile foundations. Research shows that the deeper the embedded depth of the underlying karst cave pile foundation, the greater the frictional resistance provided by the embedded section, and the greater the bearing capacity of the underlying karst cave pile foundation. As the depth of rock embedment increases, the attenuation degree of the bearing capacity of the underlying karst cave pile foundation gradually decreases. Short piles are more susceptible to the influence of karst caves compared to long piles. After the depth of rock embedment exceeds the critical value for 4d, the attenuation degree stabilizes at around 5%. The underlying karst cave pile foundation can be considered as an ordinary karst cave pile for calculation. Reasonably increasing the depth of pile foundation embedded in rock can effectively reduce the stress on the surrounding rock mass of the karst cave.
- Publication
Railway Investigation & Surveying, 2024, Vol 50, Issue 2, p104
- ISSN
1672-7479
- Publication type
Article
- DOI
10.19630/j.cnki.tdkc.202311240001