纖維泡沫顆粒輕質(zhì)土力學(xué)性質(zhì)試驗研究
[Abstract]:Foamed granular lightweight soil is a lightweight filling material composed of EPS (Expanded Polystyrene) foam particles, curing agent and raw soil. Compared with general soil, this material has the advantages of low density, good standing, durability, economy, environmental protection, and so on, so it has a wide application prospect. In order to improve the properties of lightweight soil, fiber was added to form fiber foam particle lightweight mixed soil (hereinafter referred to as lightweight soil). In this paper, the density, deformation and strength characteristics of light soil are studied by means of density test, unconfined compressive strength test, direct shear test and so on, which provide reference for engineering application. The specific research contents are as follows: (1) the density characteristics of lightweight soils with different ratios are obtained by density test. The EPS particle ratio and EPS particle size are the main factors affecting the density, and with the increase of EPS particle incorporation ratio and particle size, The density of light soil is decreased, and the influence of cement content and fiber length on the density of light soil is not obvious. (2) the deformation characteristics of light soil with different ratio. Through the unconfined compressive strength test and the direct shear test, the stress-strain law and shear stress shear displacement change law of light soil with different proportions are analyzed. By fitting the stress-strain curve of unconfined compressive strength, the variation of deformation modulus of unconfined compressive strength is studied, and the relationship between deformation modulus and compressive strength is obtained. (3) in unconfined compressive strength, The unconfined compressive strength decreases with the increase of the ratio and particle size of EPS particles. With the increase of cement content, the unconfined compressive strength increases. With the increase of fiber length, the unconfined compressive strength increases gradually, and the integrity of lightweight soil increases. (4) in the direct shear test, the shear strength and cohesion decrease with the increase of EPS ratio and particle size. With the increase of cement content, the shear strength and cohesion of lightweight soil increase. The length of the fiber increased from 9mm to 12 mm, and the shear strength increased by 40 mm. The results show that the shear strength of light soil can be improved significantly when the fiber length reaches to 12mm. (5) the unconfined compression failure mode of light soil: the light soil with EPS diameter of 0.5~1mm forms about 45 擄crack and presents brittle failure. The light soil with EPS diameter of 2~3mm formed more than 45 擄crack, and the light soil with EPS diameter of 3~5mm appeared bulging failure. Direct shear failure pattern: the shear surface of specimen is obvious, the shear plane with smaller EPS particle size is flat, and the shear plane with larger particle size is relatively loose; with the addition of fiber, the specimen is cracked and the whole soil is improved.
【學(xué)位授予單位】:湖北工業(yè)大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TU41
【相似文獻】
相關(guān)期刊論文 前10條
1 劉蜜;丁文智;;影響水泥穩(wěn)定級配碎石無側(cè)限抗壓強度主要因素分析[J];水運工程;2010年06期
2 王宏志;;淺析水泥粉煤灰穩(wěn)定碎石的配合比對其早期無側(cè)限抗壓強度的影響[J];華東公路;2007年02期
3 姜健;張敏;俞宏;;無側(cè)限抗壓強度與輕量土配比參數(shù)的非線性回歸分析研究[J];浙江水利水電?茖W(xué)校學(xué)報;2007年04期
4 彭紅濤;郭亮;孫延忠;姚新宇;;早期固化派酶土體顯微形貌與其無側(cè)限抗壓強度的關(guān)系[J];功能材料;2010年S3期
5 楊俊;許威;張國棟;唐云偉;;水泥穩(wěn)定廢棄風(fēng)化砂無側(cè)限抗壓強度試驗研究[J];環(huán)境科學(xué)與技術(shù);2014年05期
6 徐文遠;水泥粉煤灰穩(wěn)定碎石的無側(cè)限抗壓強度變化規(guī)律分析[J];東北林業(yè)大學(xué)學(xué)報;2005年03期
7 姚汾;吳相豪;;礦物摻合料影響粉質(zhì)砂土地基無側(cè)限抗壓強度的試驗研究[J];水運工程;2012年06期
8 鄔曙光;張宏;王智遠;;可控性低強度回填材料性能研究[J];內(nèi)蒙古公路與運輸;2012年04期
9 北京建井所凍土力學(xué)課題組;人工凍土瞬時無側(cè)限抗壓強度特征的試驗研究[J];建井技術(shù);1991年06期
10 張全成;黃義平;;瀝青路面穩(wěn)定類基層抗壓回彈模量與無側(cè)限抗壓強度探討[J];公路交通科技;2006年04期
相關(guān)會議論文 前6條
1 王寧偉;豐雪峰;郭朋恩;;淺析固化劑穩(wěn)定硼泥土的配合比對其早期無側(cè)限抗壓強度的影響[A];創(chuàng)新沈陽文集(A)[C];2009年
2 于志強;陳允進;苗中海;;深層水泥攪拌體強度及其質(zhì)量評價[A];地基處理理論與實踐——第七屆全國地基處理學(xué)術(shù)討論會論文集[C];2002年
3 王寧偉;高園;;固化吹填土的無側(cè)限抗壓強度試驗分析及預(yù)測[A];第十一屆全國土力學(xué)及巖土工程學(xué)術(shù)會議論文集[C];2011年
4 張向文;;攪拌樁取芯影響因素[A];企業(yè)計量測試與質(zhì)量管理——中國科協(xié)2005年學(xué)術(shù)年會論文集[C];2005年
5 陳鵬舉;白霞;蘇躍宏;李圣君;;固化風(fēng)沙土抗凍性能試驗研究[A];科技創(chuàng)新與經(jīng)濟結(jié)構(gòu)調(diào)整——第七屆內(nèi)蒙古自治區(qū)自然科學(xué)學(xué)術(shù)年會優(yōu)秀論文集[C];2012年
6 張琪;;三合土無側(cè)限抗壓強度試驗研究[A];北京力學(xué)會第十六屆學(xué)術(shù)年會論文集[C];2010年
相關(guān)碩士學(xué)位論文 前10條
1 許淼;水泥土無側(cè)限抗壓強度影響因素研究[D];西北農(nóng)林科技大學(xué);2015年
2 童琦;粉煤灰—礦粉固化疏浚淤泥力學(xué)特性及機理研究[D];華北理工大學(xué);2015年
3 鐘誠;固化石粉的力學(xué)性質(zhì)試驗研究[D];南昌航空大學(xué);2015年
4 張永強;摻礫黏土力學(xué)性能試驗研究[D];揚州大學(xué);2015年
5 宮保聚;CFG固化鉛污染土強度特性和耐久性研究[D];安徽理工大學(xué);2017年
6 高琦;纖維泡沫顆粒輕質(zhì)土力學(xué)性質(zhì)試驗研究[D];湖北工業(yè)大學(xué);2017年
7 鐘獻科;高速公路水泥攪拌樁工程質(zhì)量快速檢測方法研究[D];華南理工大學(xué);2013年
8 楊建慧;隨機分布纖維加固粉煤灰土的試驗研究[D];吉林大學(xué);2008年
9 姜云;玻璃纖維改善水泥——粉煤灰穩(wěn)定土性能的研究[D];遼寧工程技術(shù)大學(xué);2001年
10 劉娟娟;粉土的觸變性室內(nèi)試驗研究[D];太原理工大學(xué);2015年
,本文編號:2429994
本文鏈接:http://sikaile.net/jianzhugongchenglunwen/2429994.html