The geological conditions in the karst-developed area are complicated.The geological conditions directly affect the bridge design plan.On the basis of comprehensive research on the topographic and geomorphological characteristics and geological conditions of the bridge area of the Xiangjiang River Bridge in Zhuzhou and with the purpose of ascertaining the type and scale of karst development in the bridge site area and the location of each bridge pier,the authors used such means as high-density electrical method,magnetotelluric survey,shallow water earthquake and CT between holes in the survey.Verification results in the anomalous area show that the detection results are accurate and reliable,indicating that the integrated geophysical method is accurate and effective for bridge site survey.The bridge span layout scheme and pile foundation laying height were adjusted to make the layout span and pile length more reasonable,thus successfully avoiding karst,realizing the geological priority and forming the bridge design scheme for site selection.
李谭伟, 李振兴, 葛延明, 邬远明. 综合物探方法在株洲湘江大桥勘察中的应用[J]. 物探与化探, 2021, 45(3): 785-792.
LI Tan-Wei, LI Zhen-Xing, GE Yan-Ming, WU Yuan-Ming. The application of comprehensive geophysical prospecting method to the investigation of Xiangjiang bridge in Zhuzhou. Geophysical and Geochemical Exploration, 2021, 45(3): 785-792.
Li W, Li Z H, Ren C S, et al. The application of comprehensive geophysical prospecting in the survey of the Poyanghu Railway Extra Large Bridge[J]. Geophysical and Geochemical Exploration, 1997, 21(1):67-73.
Wu Y L, Chen Y X, Nie S C. The application of the cross-hole electromagnetic wave perspective method to the detection of karst in Heyetang viaduct[J]. Geophysical and Geochemical Exploration, 2009, 33(1):102-104.
Hu R Q, Huang J M. The application of comprehensive geophysical prospecting methods in the investigation of karst ground subsidence and ground subsidence geological disasters in Jinshazhou,Guangzhou[J]. Geophysical and Geochemical Exploration, 2014, 38(3):610-615.
Yao J H, Luo S J, Song W J, et al. The aplication of comprehensive geophysicial exeplorion metehod to leakage detection of a reservior[J]. Geophysical and and Geochemical Exploration, 2020, 44(2):456-462.