摘要Based on isotropic linear poroelastic theory and under the undrained condition, we summarize three equations connecting the Skempton’s coefficient B with the groundwater level. After analysis, we propose a method to calculate the Skempton’s coefficient B according to the relationship between water level and tidal strain. With this method we can get the value of B without the earthquake occurrence, which can provide the high frequency waves for research. Besides, we can also get the in-suit Skempton’s coefficient B without the experiment of rock physics. In addition, we analyze the observed data of Changping station recorded in groundwater monitoring network (abv., GMN) before and after the Wenchuan MS8.0 with this method, and find out there’s a slight change of the value of B after the seismic waves passed by, which implies that the propagation of seismic waves may have brought some variations to the poroelastic medium of the well.
Abstract：Based on isotropic linear poroelastic theory and under the undrained condition, we summarize three equations connecting the Skempton’s coefficient B with the groundwater level. After analysis, we propose a method to calculate the Skempton’s coefficient B according to the relationship between water level and tidal strain. With this method we can get the value of B without the earthquake occurrence, which can provide the high frequency waves for research. Besides, we can also get the in-suit Skempton’s coefficient B without the experiment of rock physics. In addition, we analyze the observed data of Changping station recorded in groundwater monitoring network (abv., GMN) before and after the Wenchuan MS8.0 with this method, and find out there’s a slight change of the value of B after the seismic waves passed by, which implies that the propagation of seismic waves may have brought some variations to the poroelastic medium of the well.
基金资助:National Natural Science Foundation of China (40674024 and 40374019)
通讯作者:
Yan Zhang
E-mail: eve_041744@163.com
引用本文:
Yan Zhang, Fuqiong Huang, Guijuan Lai. Reaearch on Skempton’s coefficient B based on the observation of groundwater of Changping station[J]. 《地震学报》英文版, 2009, 22(6): 631-638.
Yan Zhang, Fuqiong Huang, Guijuan Lai. Reaearch on Skempton’s coefficient B based on the observation of groundwater of Changping station. Earthquake Science, 2009, 22(6): 631-638.
