本文選題：壓縮系數(shù)　切入點(diǎn)：壓縮模量　出處：《西北農(nóng)林科技大學(xué)》2016年碩士論文

【摘要】：本論文選用志丹縣中粉質(zhì)壤土和楊凌區(qū)重粉質(zhì)壤土作為試驗(yàn)材料,通過室內(nèi)試驗(yàn)?zāi)M壩體不同深度處(0m,2m,4m,6m)不同土水比(1.75,2.0,2.25)泥漿脫水固結(jié)過程,測定泥漿壓縮系數(shù)、壓縮模量、泥漿含水率和容重等相關(guān)指標(biāo)。通過對(duì)比不同外部荷載條件下相同土水比泥漿脫水固結(jié)特性,以分析不同深度處泥漿的固結(jié)特性的變化規(guī)律;通過對(duì)比相同外部荷載條件下不同土水比泥漿脫水固結(jié)特性,分析不同土水比泥漿脫水固結(jié)特性的變化規(guī)律;以及對(duì)中、重粉質(zhì)壤土泥漿脫水固結(jié)特性進(jìn)行對(duì)比,分析其脫水固結(jié)特性與土類的關(guān)系。所得結(jié)論如下:中、重粉質(zhì)壤土泥漿相似的變化規(guī)律:(1)相同外部荷載條件下不同土水比泥漿的壓縮系數(shù)具有隨著垂直壓力的增加而減小的規(guī)律,并且在0.025~0.05Mpa壓力范圍內(nèi),泥漿的壓縮系數(shù)相差顯著,當(dāng)壓力范圍大于0.05Mpa時(shí),泥漿的壓縮系數(shù)相差不大。這表明在0.025~0.05Mpa壓力范圍內(nèi)泥漿壓縮性能受泥漿土水比影響顯著,當(dāng)壓力范圍大于0.05Mpa時(shí),泥漿的壓縮性能受泥漿土水比影響不顯著。(2)相同外部荷載條件下不同土水比泥漿的壓縮模量具有隨著垂直壓力的增加而遞增的規(guī)律,并且在0.025~0.05Mpa壓力范圍內(nèi)遞增顯著,當(dāng)壓力范圍大于0.05Mpa時(shí),壓縮模量逐漸趨于平緩的直線。(3)不同荷載條件下相同土水比泥漿壓縮系數(shù)具有隨著垂直壓力的增加而減小的規(guī)律,并且在0.025~0.05Mpa壓力范圍內(nèi),泥漿的壓縮系數(shù)減小顯著,當(dāng)壓力范圍大于0.05Mpa時(shí),泥漿的壓縮系數(shù)變化緩慢。不同荷載條件下相同土水比泥漿的壓縮系數(shù)呈現(xiàn)為0kPa32kPa64kPa96kPa。(4)不同荷載條件下相同土水比泥漿的壓縮模量具有隨著垂直壓力的增加而遞增的規(guī)律,并且在0.025~0.05Mpa壓力范圍內(nèi)遞增顯著,當(dāng)壓力范圍大于0.05Mpa時(shí),壓縮模量趨于平緩的直線。不同荷載條件下相同土水比泥漿其壓縮模量呈現(xiàn)為96kPa64kPa32kPa0kPa。中、重粉質(zhì)壤土泥漿不同的變化規(guī)律:(1)中粉質(zhì)壤土泥漿的壓縮系數(shù)表現(xiàn)為土水比為2.0土水比為1.75土水比為2.25,壓縮模量表現(xiàn)為土水比為2.25土水比為1.75土水比為2.0,這表明土水比為2.0的泥漿壓縮性能最好,土水比為1.75的次之,土水比為2.25的最低。(2)重粉質(zhì)壤土泥漿的壓縮系數(shù)表現(xiàn)為土水比為2.0土水比為2.25土水比為1.75,壓縮模量表現(xiàn)為土水比為1.75土水比為2.25土水比為2.0,這表明土水比為2.0的泥漿壓縮性能最好,土水比為2.25的次之,土水比為1.75的最低。(3)重粉質(zhì)壤土泥漿(土水比為2.0)的壓縮系數(shù)大于中粉質(zhì)壤土泥漿(土水比為2.0)的壓縮系數(shù),重粉質(zhì)壤土泥漿的壓縮模量小于中粉質(zhì)壤土泥漿的壓縮模量。這表明重粉質(zhì)壤土泥漿的壓縮性能高于中粉質(zhì)壤土泥漿的壓縮性能。
[Abstract]:This paper selects Zhidan County in Yangling District heavy silty loam and silty loam as test materials, through laboratory simulation of dam at different depths (0m, 2m, 4m, 6m) in different soil water ratio (1.75,2.0,2.25) determination process of dewatering and consolidation of mud, mud compression coefficient, compression modulus, indexes of mud water content and bulk density the same soil water. Through the comparison of different external loading conditions than the dewatering and consolidation of mud properties, to change the law of consolidation characteristics of different depth of mud; different soil water by comparing the same external load conditions than slurry dewatering consolidation characteristics, analysis of different soil water ratio variation of dewatering and consolidation of mud properties; and, heavy silt loam dewatering and consolidation of mud properties were compared, analysis of the relationship between the dehydration and consolidation characteristics of soil types. The conclusions are as follows: in the heavy silt loam mud variation similar to: (1) the same external Different soil water load conditions than the compression coefficient with mud with increasing vertical pressure and decreases, and in the 0.025~0.05Mpa pressure range, the compression coefficient of mud is significant, when the pressure range is more than 0.05Mpa, the compression coefficient of mud has little difference. This shows that in the 0.025~0.05Mpa pressure range compression performance by mud mud soil the water ratio, when the pressure range is more than 0.05Mpa, the compression performance of mud mud soil water ratio is not significantly affected. (2) different soil water conditions than the same external load compression modulus with the increase of mud with vertical pressure and the regularity of increasing, and in the 0.025~0.05Mpa pressure range increased significantly, when the pressure the range is more than 0.05Mpa, the compression modulus gradually flatten the line. (3) the same soil water under different loading conditions has increased with the vertical pressure ratio of the compression coefficient of mud The reduction of the law, and in the 0.025~0.05Mpa pressure range, the compression coefficient of mud decreases significantly, when the pressure range is more than 0.05Mpa, the compression coefficient changes slowly. The same mud soil water under different loading conditions are presented for the 0kPa32kPa64kPa96kPa. than the compressibility of mud (4) the same soil water under different loading conditions has increased with the vertical the pressure of the rule than compressive modulus of the mud, and in the 0.025~0.05Mpa pressure range increased significantly, when the pressure range is more than 0.05Mpa, the compression modulus tends to be gentle straight. The same soil water under different loading conditions is 96kPa64kPa32kPa0kPa. than the compression modulus variation of mud, heavy silt loam mud is different: (1) compression the coefficient of performance in silty loam mud for soil water ratio of 2 soil water ratio of 1.75 soil water ratio was 2.25, compression modulus showed soil water ratio of soil water ratio is 2.25 1.75 soil water ratio is 2, which indicates that the soil water ratio of 2 mud compression performance best, soil water ratio is 1.75 times, the soil water ratio of 2.25 was the lowest. (2) compression coefficient of heavy silt loam soil water slurry ratio of 2 soil water ratio of 2.25 soil water ratio 1.75, compression modulus showed the soil water ratio of 1.75 soil water ratio of 2.25 soil water ratio is 2, which indicates that the soil water ratio of 2 mud compression performance best, soil water ratio is 2.25 times, the soil water ratio of 1.75 was the lowest. (3) heavy silt loam soil (mud than water 2) the compression coefficient is larger than in the silty loam soil (mud soil water ratio is 2) compression coefficient, compression modulus of heavy silt loam mud compression modulus is less than in the silty loam mud. It is proved that the compression performance of heavy silt loam mud than in silty loam mud.

【學(xué)位授予單位】：西北農(nóng)林科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TU411.2

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