青海地区盐渍土分布规律及其盐胀溶陷机制探讨

Investigation of the distribution of saline soil in Qinghai and its unique engineering properties

针对青海一些地区盐渍土当硫酸钠含量小于1%时也会产生盐胀,而超氯盐渍土却不会产生溶陷的事实,进行了较为深入细致的论证和研究。得出如下结论:建(构)筑物由于盐胀问题引起破坏,往往由其所处地质环境因素起决定性作用,而并非完全符合相关规范所给出的硫酸钠含量超过1%才应考虑盐胀性。柴达木盆地腹地超氯盐渍土却由于难溶盐及中溶盐含量偏高,导致其反常态不产生溶陷。这些认识及观点与现行理论、规范有较大出入。

In some parts of Qinghai,the saline soil having sodium sulfate content of less than 1% will also has salt-inflation,and dissolved subsidence does not occur in the ultra-chloro-saline soil.An intensive demonstration and research was carried out for the saline soil.Based on investigation data and facts,some new understanding and new perspectives were obtained.Building materials due to salt expansion has caused damage.The geological environment tends to play a decisive role.The relevant specifications given in sodium sulfate content of more than 1% are not fulfilled before considering the expansion of salt.The ultra-chlorosaline soil in the hinterland of the Qaidam Basin does not lead to produce anti-solvent trap due to insoluble salts and high content of soluble salts.These perceptions and viewpoints are quite different from the existing theories and norms.