土工试验规范变更对膨胀计算和判定的影响
摘要:对土工试验方法标准的新旧规范中无荷膨胀率和有荷膨胀率的变化内容进行对比分析，发现两者的计算公式发生显著变化，新规范的计算结果与旧规范相比，膨胀率明显变大，膨胀量随之增大，这将对工程勘察、设计、施工等产生明显影响。以某工程为例，新规范计算后地层总膨胀量由旧规范的16.7 mm变为51.8 mm，增加了2倍左右，地基土的胀缩等级由Ⅰ级变为Ⅱ级，地基基础设计等级由丙级变为乙级，地基处理措施和施工方案随之也发生改变。因此，工程技术人员对此应综合考虑，严谨对待。
Abstract:The changes of no-load expansion rate and load expansion rate in the new and old geotechnical test codes are compared and analyzed, and it is found that the calculation formulas of the two have changed significantly. Compared with the old code, the calculation results of the new code show that the expansion rate increases obviously, and the expansion amount increases accordingly, which will have a significant impact on engineering investigation, design and construction. A project is taken as an example. After the calculation of the new code, the total expansion of stratum has changed from 16.7mm to 51.8 mm, which has increased by about two times. The expansion and contraction grade of foundation soil has changed from Grade I to Grade II, and the design grade of foundation has changed from Grade C to Grade B. The foundation treatment measures and construction schemes have also changed accordingly. Therefore, engineers should consider this comprehensively and treat it rigorously.
中文标题：
土工试验规范变更对膨胀计算和判定的影响
Influence of Geotechnical Test Code Change on Expansion Calculation and Determination
作者：
刘军,石鹏飞,孙凯
Liu Jun,Shi Pengfei,Sun Kai
作者简介:刘军,男,1980年生,汉族,河北石家庄人,大学本科,高级工程师,研究方向为工程勘察中岩石、土、水的试验和审核。E-mail:baiyunxiaohua@163.com
通讯地址：
河北中核岩土工程有限责任公司,河北石家庄 050021
NuclearIndustryofChinaGeotechnicalEngineeringCo.,Ltd.,Shijiazhuang050021,Hebei,China
中图分类号:TU411
doi:10.3969/j.issn.1007-2993.2021.02.013
出版物：岩土工程技术
收稿日期:2020-05-28
网络出版日期:2021-11-12
关键词:土工试验规范,无荷膨胀率,有荷膨胀率,膨胀量
Key words:geotechnical test code,non-load expansion rate,load expansion rate,expansion amount
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