高层建筑软土地基改良后强度特性研究  

RESEARCH ON STRENGTH CHARACTERISTICS OF SOFT SOIL FOUNDATION IMPROVEMENT IN HIGH RISE BUILDINGS

作　　者：包振侠 Bao Zhen-xia

机构地区：[1]浙江金穗工程勘察设计有限公司,浙江温州325000

出　　处：《建筑技术开发》2025年第4期150-152,共3页Building Technology Development

摘　　要：为了提高红粘土在工程实践中的适用性,通过掺入不同配比的水泥,对改良后的土体进行无侧限抗压强度试验和直剪试验,测定改良土的无侧限抗压强度和抗剪性能。结果表明:随着水泥掺入比的增加,改良土的抗压强度也在不断增加,改良土最大无侧限抗压强度对比素土强度提高了37倍。剪切应力峰值随着垂直压力、水泥掺量的增加而增加。当水泥掺量低时改良土的破坏形式为塑性破坏。当水泥掺量高时改良土的破坏形式为脆性破坏。随着水泥掺量的增加土体的内摩擦角和粘聚力均增加。In order to improve the applicability of red clay in engineering practice,unconfined compressive strength tests and direct shear tests were conducted on the improved soil by adding different proportions of cement,to determine the unconfined compressive strength and shear performance of the improved soil.The results showed that as the cement content increased,the compressive strength of the improved soil also continued to increase,and the maximum unconfined compressive strength of the improved soil increased by 37 times compared to the strength of the untreated soil.The peak shear stress increases with the increase of vertical pressure and cement content.When the cement content is low,the failure mode of the improved soil is plastic failure.When the cement content is high,the failure mode of improved soil is brittle failure.With the increase of cement content,the internal friction angle and cohesion of the soil both increase.

关 键 词：红粘土 水泥 无侧限抗压强度 直剪试验 

分 类 号：TU195[建筑科学—建筑理论]