As more engineering projects and activities are taking place on and around weak rocks, it is becoming more important to study and characterize them. Since regular practices of rock mechanical testing are not effective for weak rocks, special laboratory tests and measurements were performed to characterize the Alkharj Saudi weak sandstone rock which is a clastic rock dominantly sandy limestone and sandstone. Test results are presented in this paper. Porosity, permeability, and mechanical properties (stress, strain, Poisson's ratio, confined compressive strength and unconfined compressive strength) were obtained and then used to characterize the proposed weak rock. This paper provides a mean of classifying weak soft rocks despite encountered problems in handling and testing such materials.

随着越来越多的工程项目和活动在软岩上及其周围发生，研究和表征它们变得越来越重要。由于常规的岩石力学测试方法对弱岩石无效，因此进行了专门的实验室测试和测量以表征Alkharj Saudi弱砂岩，这是一种碎屑岩，主要为砂质灰岩和砂岩。测试结果在本文中介绍。获得了孔隙度，渗透率和力学性能（应力，应变，泊松比，有限的抗压强度和无限制的抗压强度），然后用于表征拟议的弱岩。尽管在处理和测试此类材料时遇到问题，但本文提供了一种对弱软岩进行分类的方法。