摘要
本文针对贵州岩溶场地,对4类不同岩溶形态下抗浮水位取值进行了研究,得到如下结论:(1)当场地潜水含水层厚度大于地基基础设置深度时,场地的最高地下水位与抗浮水位相同,当场区处于四周高、中间低的低洼地带及承压含水层分布区时地下水位低于抗浮水位;(2)抗浮水位取值可通过勘察期间场区地下水最高水位(H_(kmax))、可能的意外补给造成该层地下水位的变幅值(ΔH_0)和该层地下水相对勘察时的最大变幅值(ΔH_e)三者之和进行求得;(3)大型岩溶洼地场区对有地下工程分布的建筑物应重点考虑抗浮影响,这与场区的历史水位、将来环境条件改变后可能存在的最高水位密切相关;基础下部发育大型空腔溶洞场地需要认真分析溶洞水环境特征;浅埋型岩溶暗河管道发育场地地下建筑物底板基础可能存在置于暗河顶部附近或穿过暗河管道两种情况,两者对抗浮水位取值均有不同程度的影响;承压含水层场地应通过水位变化线性图确定场地抗浮水位变化范围,整体地下建筑物按高值确定抗浮水位,分段地下建筑物区间高值确定。本文研究对岩溶地区工程建设有一定的指导意义。
Aiming at karst site in Guizhou,four different karst forms anti-uplift water level values are studied and the following conclusions are got：（ 1） If the spot to unconfined aquifer thickness is greater than the depth of the foundation,the space of the underground water level and construct water level are the same,if the spot area around in high,middle low low-lying areas and underground water level below the anti-uplift water level when confined aquifer distribution area.（ 2） Anti-uplift water level values can be obtained by the sum of the following three： the highest groundwater level during the investigation of ground（ H（kmax））,the possible accident supplies to cause the layer of the underground water level amplitude value（ ΔH0） and the maximum amplitude of the layer groundwater relative prospecting（ ΔHe）.（ 3） In large karst depressions,it is important to consider the impact of anti-floating on underground buildings,which is closely related to the historical water level of the site and the possible max-level after the change of environmental conditions. The site of large cavity cavern with large cavity should be carefully analyzed.The site of the development of shallow buried karst underground river pipeline underground building mat foundation may exist in the rivers near the top or through underground river pipes,the value of anti-uplift water level are the influence of different level. Confined aquifer field should be determined by the water level change linear figure site scope of anti-uplift water level changes,the whole underground building determined according to the high value of anti-uplift water level,the piecewise interval high value to determine underground buildings. This paper has some guiding significance for engineering construction in karst area.
作者
胡政
田茂中
陈再谦
王平易
汪东
Hu Zheng;Tian Maozhong;Chen Zaiqian;Wang Pingyi;Wang Dong(Guiyang Engineering Co.Ltd.,PowerChina,Guiyang 550081,P.R.China)
出处
《地下空间与工程学报》
CSCD
北大核心
2018年第5期1322-1330,共9页
Chinese Journal of Underground Space and Engineering
关键词
抗浮水位
岩溶形态
地下水位
anti-floating water level
karst form
underground water level
