[1]黄根民,刘华强,朱红军,等.固化海相土抗拉强度特性研究[J].江苏水利,2023,(06):1-4,10.
　HUANG Genmin,LIU Huaqiang,ZHU Hongjun,et al.Study on tensile strength characteristics of marine solidified soil[J].JIANGSU WATER RESOURCES,2023,(06):1-4,10.
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固化海相土抗拉强度特性研究()
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《江苏水利》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2023年06期
页码:
1-4,10
栏目:
水利工程建设
出版日期:
2023-06-30

文章信息/Info

Title:
Study on tensile strength characteristics of marine solidified soil
文章编号:
1007-7839（2023）06-0001-0004
作者:
黄根民; 刘华强; 朱红军; 陆明志; 夏祥林
（江苏省水利科学研究院，江苏 扬州 225002）
Author(s):
HUANG Genmin;  LIU Huaqiang;  ZHU Hongjun;  LU Mingzhi;  XIA Xianglin
（Jiangsu Hydraulic Research Institute, Yangzhou 225002, China）
关键词:
海相土; 抗拉强度; 固化剂; 含水率
Keywords:
marine soil;  tensile strength;  curing agent;  moisture content
分类号:
TV42+3
文献标志码:
A
摘要:
试验分析了固化剂掺量、养护龄期和含水率对固化海相软土的抗拉强度影响规律。结果表明，水泥和石灰混掺的固化效果明显优于水泥和粉煤灰混掺。水泥+石灰混掺的固化土各龄期抗拉强度均比水泥+粉煤灰的高，前者是后者的1.3~2.9倍。海相软土的初始含水率为60%时，28 d固化土抗拉强度较7 d龄期提升了14%~27%。初始含水率增至80%后，28 d固化土抗拉强度较7 d龄期提升了120%~170%。相同固化剂掺量下，海相软土的初始含水率对固化土抗拉强度影响显著。固化土无侧限抗压强度和抗拉强度呈正相关，水泥+石灰混掺固化土的28 d龄期抗拉强度是其无侧限抗压强度的9%~16%。指出影响固化海相软土抗拉强度的因素依次为初始含水率、养护龄期、固化剂掺量。固化剂掺量中水泥掺量的影响最大，粉煤灰掺量次之，石灰掺量影响最小。实际工程中，降低土体初始含水率，保证充足的养护时间以及选择合适的固化剂掺量能提高固化土的抗拉强度。
Abstract:
The effects of curing agent content, curing age and moisture content on the tensile strength of marine solidified soft soil were analyzed by the experiments. As a result, the curing effect of cement and lime mixture was significantly better than that of cement and flyash mixture. The tensile strength of cement and lime mixed with solidified soil at all ages is higher than that of cement and fly ash, and the former is 1.3 to 2.9 times more than the latter. When the initial moisture content of marine soft soil is 60%, the tensile strength of 28 d solidified soil is increased by 14%~27% compared with the 7 d-aged. After the initial moisture content increased to 80%, the tensile strength of 28d solidified soil increased by 120%~170% compared with the 7d-aged. Under the same amount of curing agent, the initial moisture content of marine soft soil has a significant effect on the tensile strength of solidified soil. The unconfined compressive strength and tensile strength of solidified soil were positively correlated, and the 28d-aged tensile strength of cement and lime mixed with solidified soil was 9%~16% of its unconfined compressive strength. It was pointed out that the factors affecting the tensile strength of solidified marine soft soil were initial moisture content, curing age and curing agent content. Among the curing agent content, the influence of cement content is the largest, followed by flyash content and lime content is the smallest. In actual engineering, the tensile strength of cured soil can be improved by reducing the initial moisture content of the soil, ensuring sufficient curing time and selecting the appropriate amount of curing agent.

参考文献/References:

[1]聂年圣，牛瑞森. 海相软土成因及其工程特性的研究[J]. 工程建设与设计，2010（12）：72-74.
[2]邓永锋，吴燕开，刘松玉，等. 连云港浅层海相软土沉积环境及物理力学性质研究[J]. 工程地质学报，2005（1）：29-33.
[3]李军霞，王常明，张先伟，等. 两种滨海相软土固结特性的试验研究[J]. 水文地质工程地质，2009，36（5）：35-39，52.
[4]王东星，徐卫亚. 固化淤泥长期强度和变形特性试验研究[J]. 中南大学学报（自然科学版），2013，44（1）：332-339.
[5]徐超，董天林，叶观宝. 水泥土搅拌桩法在连云港海相软土地基中的应用[J]. 岩土力学，2006（3）：495-498.

备注/Memo

备注/Memo:
收稿日期：2023-04-21
基金项目：江苏省科技厅省属公益类科研院所自主科研经费项目（BM2018028）
作者简介：黄根民（1966—），男，高级工程师，主要从事水利工程检测与研究。E-mail:1653881832@qq.com
更新日期/Last Update: 2023-06-30