吹填土固化结构强度增长特性的试验研究
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摘要
伴随着我们国家经济和社会的高速发展,基础设施建设正在如火如荼的进行。但是,随之而来的是土地资源的日益紧张。这样的情况下,在我国东部和南部沿海地区,开始采用人工填筑地基与吹填造陆技术来解决经济发展中的用地矛盾,并在近段时间以来,此技术得到了广泛的关注与应用。
由于我国各个地方的地质条件与经济发展水平参差不齐,而吹填施工受采用的吹填材料——淤泥具有孔隙比高、压缩性高、含水率高且承载力低的工程特性,于是就需要对吹填过程中由淤泥形成的吹填土固化结构强度的增长过程进行认真且细致的研究。本文以我国沿海某地区滨海相吹填土为研究对象,以吹填土的基本土工性质为出发点,通过室内三轴试验、沉降柱试验和量筒沉降试验,探索不同固化剂材料试验条件下,固化吹填土强度形成的对比试验的特性;并通过电镜扫描试验,从微观角度,研究了滨海相吹填土在固化强度形成过程中,微观结构的演变规律。
本文主要工作与结论:
1.从实际工程出发,结合相关研究成果和工程实际经验,试验研究选用了几种常用固化剂,对其在不同配比条件下的固化效果进行了对比,并得出最佳组合方案。
2.采用沉降柱试验模拟了全尺寸条件,试验研究滨海相吹填土在不同固化剂和排水条件下的固化强度形成过程,并得出最优实施方案。
3.使用2000ml大量筒,对不同固化剂与含水率条件下的吹填土进行了沉降观测,并得出最好的固化剂配合比与含水率条件。
4.通过电子显微镜扫描,得到各种原状土样和吹填土样的电镜照片,并经过分析这些电镜照片,研究不同条件下各种土样的微观结构特征。
5.总结了本文研究成果,并对未来的研究方向与方法进行了展望。
Following the highly development of economic, the built of infrastructure construction speed up in China. But facing the rapid development of urbanization and city infrastructure construction, people began to use artificial fill-up foundation and hydraulic fill to solve the problem of the limitation in land providing.
Because it is vast of our country, different place has various level of economics development. Hydraulic fill constriction which use the sludge has the engineering advantage of having the high level of void ratio, compressibility, water content and low ability of bearing capacity. As such engineering advantages we mentioned above, so we need to carefully research the structural strength’s growth process of solidification in the hydraulic fill constriction. This Paper takes the dredger fill of littoral facies in the south area in our country as the object of study, and use the indoor triaxial test、sedimentation column、cylinder settlement experiment to do the comparative study of structural strength in the different experimental condition by using various hardeners. The Paper also use the SEM experiment to study the microcosmic evolvement rules of Research on reinforce dredger fill of littoral facies with sedimentation column.
The works and conclusions of this Paper:
Firs of all, I contract the effect of solidification by using several different common hardeners, and then get the best combined program.
Secondly, I use the model of sedimentation column to do the Full-size condition research of the different structural strength establishment in various hardeners and drainage conditions,and then get the best dealing program.
Thirdly, I use a lot of large tube of 2000ml to do the settlement observation in various hardeners and rates of water content, and then get the best mixing proportion of hardeners and the best condition of the rate of water content.
Fourthly, I get the different SEM of undisturbed soil and dredger fill, and research this SEM to get the Microstructure characteristics of different soil patterns.
Last but not the least, I Summarizes the results of this study and outlook the future directions and methods
由于我国各个地方的地质条件与经济发展水平参差不齐,而吹填施工受采用的吹填材料——淤泥具有孔隙比高、压缩性高、含水率高且承载力低的工程特性,于是就需要对吹填过程中由淤泥形成的吹填土固化结构强度的增长过程进行认真且细致的研究。本文以我国沿海某地区滨海相吹填土为研究对象,以吹填土的基本土工性质为出发点,通过室内三轴试验、沉降柱试验和量筒沉降试验,探索不同固化剂材料试验条件下,固化吹填土强度形成的对比试验的特性;并通过电镜扫描试验,从微观角度,研究了滨海相吹填土在固化强度形成过程中,微观结构的演变规律。
本文主要工作与结论:
1.从实际工程出发,结合相关研究成果和工程实际经验,试验研究选用了几种常用固化剂,对其在不同配比条件下的固化效果进行了对比,并得出最佳组合方案。
2.采用沉降柱试验模拟了全尺寸条件,试验研究滨海相吹填土在不同固化剂和排水条件下的固化强度形成过程,并得出最优实施方案。
3.使用2000ml大量筒,对不同固化剂与含水率条件下的吹填土进行了沉降观测,并得出最好的固化剂配合比与含水率条件。
4.通过电子显微镜扫描,得到各种原状土样和吹填土样的电镜照片,并经过分析这些电镜照片,研究不同条件下各种土样的微观结构特征。
5.总结了本文研究成果,并对未来的研究方向与方法进行了展望。
Following the highly development of economic, the built of infrastructure construction speed up in China. But facing the rapid development of urbanization and city infrastructure construction, people began to use artificial fill-up foundation and hydraulic fill to solve the problem of the limitation in land providing.
Because it is vast of our country, different place has various level of economics development. Hydraulic fill constriction which use the sludge has the engineering advantage of having the high level of void ratio, compressibility, water content and low ability of bearing capacity. As such engineering advantages we mentioned above, so we need to carefully research the structural strength’s growth process of solidification in the hydraulic fill constriction. This Paper takes the dredger fill of littoral facies in the south area in our country as the object of study, and use the indoor triaxial test、sedimentation column、cylinder settlement experiment to do the comparative study of structural strength in the different experimental condition by using various hardeners. The Paper also use the SEM experiment to study the microcosmic evolvement rules of Research on reinforce dredger fill of littoral facies with sedimentation column.
The works and conclusions of this Paper:
Firs of all, I contract the effect of solidification by using several different common hardeners, and then get the best combined program.
Secondly, I use the model of sedimentation column to do the Full-size condition research of the different structural strength establishment in various hardeners and drainage conditions,and then get the best dealing program.
Thirdly, I use a lot of large tube of 2000ml to do the settlement observation in various hardeners and rates of water content, and then get the best mixing proportion of hardeners and the best condition of the rate of water content.
Fourthly, I get the different SEM of undisturbed soil and dredger fill, and research this SEM to get the Microstructure characteristics of different soil patterns.
Last but not the least, I Summarizes the results of this study and outlook the future directions and methods
引文
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[9]陈萍,张振营,李小山等.废弃淤泥作为再生资源的固化技术与工程应用研究[J].浙江水利科技, 2006, 32(11):1-3.
[10]朱伟,刘汉龙,高玉峰.工程废弃土的再生资源利用技术[J].再生资源研究, 2001, 7(6):32-35.
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