广东省复杂环境下典型滑坡地表-地下形变监测预警技术研究--以太平村滑坡为例

Study on Monitoring and Early Warning Technology of Surface and Underground Deformation of a Typical Landslide in a Complex Environment in Guangdong Province——Taking the Taipingcun Landslide as an Example

对原GNSS变形监测终端进行改造升级,研发了多星多频GNSS高精度变形监测终端,研究了GNSS本地解算技术,结合4G全网通、短距离通信技术和北斗短报文等多模通信融合技术,解决野外复杂环境下现场监测终端不能稳定解算及北斗GNSS原始数据无法完整传输至服务器等问题,并将阵列式位移计应用于清远市阳山县太平镇太平村滑坡隐患,实现对滑坡的地表、地下实时动态形变监测。结果表明:GNSS地表位移监测相对于原有激光地表位移监测精度更高,数据更稳定可靠,受外在复杂环境的干扰影响更少,能较为准确地捕捉滑坡体的运动状态,并对险情及时发出预警。监测数据显示,太平村滑坡体后缘较为稳定,前缘呈现较大变形,出现局部滑动,在强降雨条件下再次发生局部滑动的可能性较大。

In this paper,we upgraded the original GNSS deformation monitoring terminal,developed a multi-satellite multi-frequency GNSS high-precision deformation monitoring terminal,and studied the GNSS local solution technology.Combined with the multi-mode communication fusion technologies such as 4 G full Netcom,short-distance communication technology and Beidou short message,we solved the problems such as the unstable solution of the field monitoring terminal,and the incomplete server data caused by the failure of transmitting the Beidou GNSS original data to the server for solution.The array displacement meter was applied to monitor deep deformation of the Taipingcun landslide and its geological hazards.The results show that the GNSS surface displacement monitoring has higher accuracy than the original laser surface displacement monitoring,and the data can be more stable and reliable.The monitoring data show weakly fluctuated due to the interference of external complex environment,which is better adapted to a complex environment.We suggest that the data can accurately prent the motion status of the landslide and present early warning at dangerous situations in time.The monitoring data show that the trailing edge of the landslide is relatively stable at present.However,its leading edge is greatly deformed characterized by local sliding,which indicates that the landslide might be likely to occur again under heavy rainfall.