Identification and Cause Analysis of Landslide of Yangzhuang Bridge of Luolu Exprassway Based on SBAS-InSAR
[Purposes]Affected by sustained heavy rainfall,the tail cone slope of the Yangzhuang Bridge of on the Luolu Expressway in Luoning County,Henan Province collapsed in July 2021,posing a serious threat to road traffic safety.It is urgent to find out the deformation area and deformation rule of landslide,providing a basis for prevention and control engineering and disaster warning.[Methods]Therefore,the SBAS-InSAR technology was used to process the 54 ascending orbit SAR images covering the Yang-zhuang Bridge,and the landslide deformation trend was analyzed by the geological characteristics and rainfall data.[Findings]The results show that the lower part of the landslide deformation is stronger than upper part,and the overall deformation shows negative settlement,with a maximum deformation variable of-33.67 mm.Landslide development status has good corresponding relation with rainfall,when the rain-fall increases,the deformation increases more obviously.In the later stage of monitoring,the temporal displacement curve of deformation feature points from P1～P6 maintained good convergence,indicating that the landslide repair and reinforcement project played a certain role in anti-sliding.[Conclusions]SBAS-InSAR technology is highly feasible in the field of landslide deformation monitoring and has im-portant practical significance for landslide disaster prevention and reduction.
NETL
NSTL
万方数据
