基于PS-InSAR技术的后海深槽地面及建筑物形变监测分析

Monitoring and analysis of ground and building settlement of deep trough in Houhai based on PS-InSAR technology

深圳市南山区后海片区为总部大厦基地,莲花山断裂带和珠江口大断裂带在此交汇,区域内基岩埋藏较深,断层较发育,存在巨厚的风化深槽,地面高层建筑多采用超长桩基础。文中研究采用永久散射体合成孔径雷达干涉测量技术对深圳市南山区后海片区南部东侧沿海部分的地面和建(构)筑物进行大范围、长时间形变监测。监测结果表明,深槽上建筑物以及其他构筑物沉降相对稳定,目前在后海巨厚深槽上的建筑桩基施工工艺安全有效。沉降量较大的区域为深圳湾公园草地及其周边区域,主要由于填海造陆软土引起形变。经过与传统监测技术的对比,InSAR技术监测精度满足规范要求。在大范围、低成本、高精度、高效率的形变监测需求方面,InSAR技术具有优势。

The Houhai area in Nanshan District of Shenzhen is the base of the headquarters building,where the Shenzhen fault zone and the Pearl River Mouth fault zone meet here.In this region,the bedrock is buried deeply,the faults are well developed,and there is huge thick weathered deep trough.Thus,overlength pile foundation is used in high-rise buildings.In this study,the permanent scatterers interferometric synthetic aperture radar technique was used to monitor the settlement of ground and structures in houhai Deep trough research area,Nanshan District,Shenzhen.The monitoring results show that the settlement of buildings and other structures on deep trough is relatively stable,and the pile foundation construction technology in Houhai research area is safe and effective at present.The grassland of Shenzhen Bay Park and its surrounding areas have a large amount of settlement,which is mainly caused by the settlement of soft land reclaimed from the sea.Compared with the traditional monitoring technology,the monitoring accuracy of InSAR technology meets the requirements.The InSAR technology has advantages for large-scale,low-cost,high-precision and high-efficiency deformation monitoring.