粉煤灰场地压缩模量与标贯试验相关性研究

Study on Correlation between Compressive Modulus of Fly Ash Site and Standard Penetration Test

粉煤灰露天堆场不仅带来环境污染,还占用大量土地。为充分利用粉煤灰堆场作为工程建设用地,其承载力、压缩模量等指标的确定便成为工程技术人员需解决的问题之一。然而,一方面粉煤灰不同于一般土体,勘探过程中取、送及室内制备原状样面临人为扰动,固结试验往往与现场实际存在偏差;另一方面,灰场面积大,填筑时碾压不均造成粉煤灰压缩性在不同深度、不同部位均有差异,全面了解灰场内粉煤灰压缩性费时费力。在此,通过某一勘察项目,探讨粉煤灰压缩模量与标贯锤击数的相关性,从而快速获取粉煤灰的压缩性指标,为今后类似的项目提供一定借鉴参考。

The fly ash open storage yard not only brings environmental pollution,but also occupies a large amount of land.In order to make full use of the fly ash yard as the construction land,the determination of its bearing capacity,compression modulus and other indicators has become one of the problems that engineers and technicians need to solve.However,on the one hand,fly ash is different from ordinary soil,and the undisturbed samples taken,sent and prepared indoors are subject to human disturbance,so the consolidation test often deviates from the actual situation on site.On the other hand,due to the large ash yard area and uneven rolling during filling,the compressibility of fly ash is different in different depths and different parts,so it takes time and effort to fully understand the compressibility of fly ash in the ash yard.In this paper,through a survey project,the correlation between the compression modulus of fly ash and the number of standard penetration blows is discussed,so as to quickly obtain the compressibility index of fly ash,and provide some reference for similar projects in the future.