杭州軟土固化優(yōu)化研究
發(fā)布時間：2018-07-25 12:13
【摘要】：杭州地區(qū)分布有大片軟土地基,其中絕大部分含水量較高,且含有一定量的有機質(zhì)。與此同時,這些軟土表現(xiàn)出一些共有的工程特性,如壓縮性高,承載力低,滲透性小等。為了使這些地基的各項工程指標滿足實際需求,常需對其進行固化處理。傳統(tǒng)水泥土、石灰土的固化方法對不同軟土的處理缺乏針對性,不同區(qū)域的土體固化效果差異較大。因此有必要針對杭州地區(qū)軟土的特點,研發(fā)出適宜的固化劑或添加劑產(chǎn)品,并給出方便快捷的固化方案優(yōu)選策略,從而達到集約型處理的目的。為此,本文主要開展了如下工作： (1)針對杭州軟土高含水量和高有機質(zhì)含量的特點,深入分析了土體含水量與有機質(zhì)對固化效果的影響機制,在此基礎(chǔ)上綜合考慮固化效果、材料價格、取材與施工的便利性等因素,確定采用水泥、生石膏、生石灰、碳酸鈉這四種固化材料改良軟土性質(zhì)。 (2)將響應(yīng)面法引入添加劑配方的研究中,在摻入水泥的基礎(chǔ)上,以不同齡期的固化土無側(cè)限抗壓強度為響應(yīng)值,以生石膏、生石灰、碳酸鈉三種添加成分的摻入比為影響因子,通過方差分析、單因子效應(yīng)分析、交互作用分析及機理分析,最終完成了水泥系添加劑CX-13配方的確定。 (3)將響應(yīng)面法引入固化方案的優(yōu)化研究中,以不同齡期下固化土無側(cè)限抗壓強度為響應(yīng)值,以土有機質(zhì)含量、初始含水量、水泥摻入比、CX-13摻入比為四個影響因子,構(gòu)建不同齡期下固化土的強度量化模型。根據(jù)所得固化土強度量化模型深入分析影響因子間的交互作用規(guī)律,并從機理上對其進行了剖析。 (4)將拉格朗日乘數(shù)法引入固化方案的優(yōu)化分析中,并以算例的形式闡述了具體的實施步驟。通過對單一水泥固化和水泥與CX-13聯(lián)合固化進行對比試驗,進一步說明了添加劑CX-13在實際軟土固化處理中的經(jīng)濟適用性。
[Abstract]:There is a large area of soft soil foundation in Hangzhou area, most of which have high water content and contain a certain amount of organic matter. At the same time, these soft soils show some common engineering characteristics, such as high compressibility, low bearing capacity, low permeability and so on. In order to meet the actual requirements of these foundation engineering indexes, it is often necessary to solidify them. The solidification methods of traditional cement soil and lime soil have little pertinence to the treatment of different soft soil, and the solidification effect of different regions is quite different. Therefore, it is necessary to develop suitable hardener or additive products according to the characteristics of soft soil in Hangzhou area, and give the convenient and quick strategy of optimal selection of curing scheme, so as to achieve the purpose of intensive treatment. Therefore, the main work of this paper is as follows: (1) according to the characteristics of high moisture content and high organic matter content in Hangzhou soft soil, the influence mechanism of soil moisture content and organic matter on solidification effect is deeply analyzed. On this basis, the factors such as solidification effect, material price, material selection and construction convenience are considered synthetically, and cement, raw gypsum and quicklime are adopted. The four solidified materials, sodium carbonate, are used to improve the properties of soft soil. (2) the response surface method is introduced into the study of additive formulation. Based on the addition of cement, the unconfined compressive strength of the solidified soil of different ages is taken as the response value, and the gypsum is used as raw gypsum. The mixing ratio of lime and sodium carbonate was the influence factor, which was analyzed by variance analysis, single factor effect analysis, interaction analysis and mechanism analysis. Finally, the CX-13 formula of cement additive was determined. (3) the response surface method was introduced into the optimization study of curing scheme. The unconfined compressive strength of solidified soil under different ages was taken as the response value, the content of soil organic matter and the initial water content were taken as the response value. The cement blending ratio (CX-13) is four influencing factors, and the strength quantification model of solidified soil at different ages is constructed. According to the quantitative model of the strength of solidified soil, the interaction law among the influencing factors is deeply analyzed, and the mechanism is analyzed. (4) the Lagrange multiplier method is introduced into the optimization analysis of solidification scheme. And the concrete implementation steps are expounded in the form of an example. The economic applicability of additive CX-13 in the curing treatment of soft soil is further explained by comparing the single cement solidification and cement / CX-13 curing.
【學位授予單位】：浙江大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU447
本文編號：2143788
[Abstract]:There is a large area of soft soil foundation in Hangzhou area, most of which have high water content and contain a certain amount of organic matter. At the same time, these soft soils show some common engineering characteristics, such as high compressibility, low bearing capacity, low permeability and so on. In order to meet the actual requirements of these foundation engineering indexes, it is often necessary to solidify them. The solidification methods of traditional cement soil and lime soil have little pertinence to the treatment of different soft soil, and the solidification effect of different regions is quite different. Therefore, it is necessary to develop suitable hardener or additive products according to the characteristics of soft soil in Hangzhou area, and give the convenient and quick strategy of optimal selection of curing scheme, so as to achieve the purpose of intensive treatment. Therefore, the main work of this paper is as follows: (1) according to the characteristics of high moisture content and high organic matter content in Hangzhou soft soil, the influence mechanism of soil moisture content and organic matter on solidification effect is deeply analyzed. On this basis, the factors such as solidification effect, material price, material selection and construction convenience are considered synthetically, and cement, raw gypsum and quicklime are adopted. The four solidified materials, sodium carbonate, are used to improve the properties of soft soil. (2) the response surface method is introduced into the study of additive formulation. Based on the addition of cement, the unconfined compressive strength of the solidified soil of different ages is taken as the response value, and the gypsum is used as raw gypsum. The mixing ratio of lime and sodium carbonate was the influence factor, which was analyzed by variance analysis, single factor effect analysis, interaction analysis and mechanism analysis. Finally, the CX-13 formula of cement additive was determined. (3) the response surface method was introduced into the optimization study of curing scheme. The unconfined compressive strength of solidified soil under different ages was taken as the response value, the content of soil organic matter and the initial water content were taken as the response value. The cement blending ratio (CX-13) is four influencing factors, and the strength quantification model of solidified soil at different ages is constructed. According to the quantitative model of the strength of solidified soil, the interaction law among the influencing factors is deeply analyzed, and the mechanism is analyzed. (4) the Lagrange multiplier method is introduced into the optimization analysis of solidification scheme. And the concrete implementation steps are expounded in the form of an example. The economic applicability of additive CX-13 in the curing treatment of soft soil is further explained by comparing the single cement solidification and cement / CX-13 curing.
【學位授予單位】：浙江大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU447
【參考文獻】
相關(guān)期刊論文 前10條
1 荀勇;有機質(zhì)含量對水泥土強度的影響與對策[J];四川建筑科學研究;2000年03期
2 潘林有;特殊區(qū)域淤泥質(zhì)軟土水泥攪拌樁加固探索[J];四川建筑科學研究;2001年04期
3 周永祥;閻培渝;;土壤加固技術(shù)及其發(fā)展[J];鐵道科學與工程學報;2006年04期
4 黃殿瑛，張可能，曾祥熹;SF對水泥土的影響初探[J];大地構(gòu)造與成礦學;1995年03期
5 曾衛(wèi)東,唐雪云,何泌洲;深層攪拌法在處理泥炭質(zhì)土中的應(yīng)用[J];地質(zhì)災(zāi)害與環(huán)境保護;2002年02期
6 謝海瀾,王清,李萍,劉娉慧;生石灰和水泥混合處理吹填土的試驗研究[J];工程地質(zhì)學報;2003年01期
7 劉瑩;王清;;水泥與生石灰處理吹填土對比試驗研究[J];工程地質(zhì)學報;2006年03期
8 王寶勛;李夕兵;杜東菊;楊愛武;;應(yīng)用堿性水泥外摻劑固化天津海積軟土的試驗研究[J];工程地質(zhì)學報;2009年03期
9 張樹彬;王清;陳劍平;范建華;;土體腐殖酸組分對水泥土強度影響效果試驗[J];工程地質(zhì)學報;2009年06期
10 劉曉明;付海雄;郭鳴琴;;水泥土的力學性能綜述[J];湖南工程學院學報(自然科學版);2006年01期
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