水泥土抗压属性实验
毕业论文关键词 水泥土 无侧限抗压强度 地基承载力
Title Soil cement compressive property experiment
Abstract Soil cement is uniformly stirred according to cement slurry and soil water cement ratio,cement and soil physical, chemical, generating overall, hard, water stability of resultants. Soil cement mixing method is applicable to the treatment of silt, silty soil, clay andwater content is higher and the standard value of foundation bearing capacity of cohesive soil is less than 120 kPa, foundation. The cement soil is a method of mixingby powder injection and deep, will serve as a mixing cement and admixture curing agent to the soft soil foundation, the material composition of cement and in soft soil physical and chemical reaction, the formation of stable and continuous elastic plastic body, can improve the compressive strength of the soft soil foundation, reduce the deformation soft soil foundation, at the same time improve soil permeability, and with the surrounding natural soil (the soil between the piles) together to form composite foundation. Because this kind of foundation treatment method has a high rate of reinforcement types, environmental impact of small, flexible and low cost by using in situ soil, field of engineering, has been widely used in the treatment of soft soil foundation at present. In this paper, through the indoor experiment and engineering practice, the cement soil is closely related to the unconfined compressive strength are studied and analyzed.
Key wordsThe unconfined compressive strength of cement soil
目次
1引言.1
1.1概述..1
1.2水泥土抗压强度研究现状3
2水泥土工程性能及应用7
2.1水泥土硬化机理..7
2.2水泥土力学性能.11
2.3水泥土施工工艺.16
2.4水泥土的工程应用..17
3水泥土抗压强度试验研究21
3.1实验材料.21
3.2无侧限抗压强度试验22
3.3试验结果分析24
3.4压强度影响因素分析27
结论37
致谢38
参考文献..39
1 引言 1．1 概述
1．1．1水泥土的发展史 水泥土是将一定量的水泥与土拌和后形成的一种混合材料，从而对土进行改良。水泥土已广泛用于工程建设。 美国对于水泥土的研究和应用较早，并建设了许多在世界上有一定影响力的大规模工程，50年代美国侵压注浆公司(IntrusionPrepaktCo．)首先研制开发成功。水泥土在美国被广泛应用于二级公路、市区街道和轻交通量的机场中，使用效果较为满意。1953年，本清水建设株式会社引进这种施工方法。1974 年，由同本港湾技术研究所、川崎钢铁厂和不动建设株式会社等厂家合作开发研制成功水泥搅拌固化法(CMC)，用于加固钢铁厂矿石堆场软土地基，加固深度达 32m。接着日本各大施工企业接连开发出施工机械规格、施工效率各异的深层搅拌机械，形成多种工法[1-3]。 源]自=优尔-·论~文"网·www.youerw.com/ 我国从20世纪70年代开始对水泥土进行试验推广。冶金部建筑研究总院地基所和交通部水运规划设计院于 1977 年开始进行深层搅拌法的室内试验和施工机械研制工作。80 年代，水利部门对水泥土的研究使用更为普遍。水泥土的广泛应用有在石料奇缺的长江荆江大堤上的水泥土护坡试验，在塞外严寒地区的红领巾水库灌区用水泥土做的渠道防渗试验等。建设部门也是在该时期采用深层搅拌技术将地基软土和水泥浆强制拌和来加固地基。在深圳宝安德松白公路(二级公路)和新城大道的路囱结构中均采用了水泥土复合地基，上海静安寺下沉广场围护工程和轻轨宝兴路站承台围护工程中应用了型钢水泥土复合桩(SMW)等[2-4]。