大连海事大学学报 >
2017 , Vol. 43 >Issue 4: 117 - 121
DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2017.04.017
高温烧结淤泥质土水理性质试验研究
收稿日期: 2017-06-09
修回日期: 2017-07-18
网络出版日期: 2017-07-18
基金资助
中央高校基本科研业务费专项资金资助项目(01770622).
Experimental study on hydrate properties of elevated temperature sintering mucky soil
Received date: 2017-06-09
Revised date: 2017-07-18
Online published: 2017-07-18
为确定将高温烧结处理淤泥质土层应用于基坑支护的可行性，对高温烧结淤泥质土进行水解试验，研究不同烧结温度和时间下淤泥质土在水解作用下抗压强度的变化规律，并简要分析试验发生机理.试验结果表明：(1)高温烧结淤泥质土在水解作用下，随着水解时间的增加，单轴抗压强度逐渐下降变缓，最终趋于稳定.（2）高温烧结处理淤泥质土层应用于基坑支护具有很好的效果，最合理的烧结温度与烧结时间为800℃、3 h组合.在水解作用下，单轴抗压强度下降28%左右后维持在3 MPa以上.（3）高温烧结淤泥质土使得微观结构致密，同时产生Ca2SiO4等物质使得强度提高，在水理作用下部分物质可以保持自身结构，因此，强度最终趋于稳定.综上，高温烧结法处理淤泥质土方案可行，施工简便，对于节约工程成本、缩短工期具有重要意义.
刘云壮 , 易南概 , 钟林 , 张栋 . 高温烧结淤泥质土水理性质试验研究[J]. 大连海事大学学报, 2017 , 43(4) : 117 -121 . DOI: 10.16411/j.cnki.issn1006-7736.2017.04.017
To determine the feasibility of applying high temperature sintering mucky soil treatment into foundation pit support, the hydrolysis test of sintered mucky soil was conducted to study its change law of compressive strength under different sintering temperature and time, and the mechanism of the experiment was briefly analyzed. Experiment results show that: (1) With the hydrolysis time increasing, the single-axial compressive strength of high temperature sintering mucky soil decreases gradually, and finally stabilizes. (2) Applying high temperature sintering mucky soil into foundation pit support acquires satisfactory effect. The most reasonable sintering temperature and time is 800℃, 3 hours respectively. The uniaxial compressive strength of the treated soil decreases by about 28% and remains at over 3 MPa after hydrolysis.(3)The high temperature sintering mucky soil makes the microstructure compact and produces Ca2SiO4 and so on, which makes the strength increase. Some of the material after hydrolysis can maintain its own structure, so the strength will eventually become stable. In summary, it is easy to treat mucky soil with high temperature sintering method, which is significant for saving project cost and shortening construction period.
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