市政技术
市政技術
시정기술
MUNICIPAL ENGINEERING TECHNOLOGY
2011年
5期
128-132
,共5页
三相土%饱和黏性土%热物理性质%含水量%密度%孔隙比
三相土%飽和黏性土%熱物理性質%含水量%密度%孔隙比
삼상토%포화점성토%열물이성질%함수량%밀도%공극비
three-phase soil%saturated cohesive soil%thermo physical properties%moisture content%density%void ratio
根据二相土的组成特点，研究饱和黏性土热物理性质与其含水量、密度及孔隙比等参数问的关系。在武汉地铁详勘阶段，采取一级阶地黏性土饱和原状土样，利用KD2 Pro Thermal Properties Analyzer热参数分析仪进行热物理性质试验，同时测试土样的含水茸及密度。对试验结果进行回归分析，分析时假设土中水及同体颗粒骨架的热物理性质为定值，且土中水分没有明显的迁移。结果表明：黏性土导热系数随原状土样密度的增加而增加，随孔隙比的增加而降低：比热容随原状土样含水量的增加而增加。结合试验结果及同外的经验公式．给出了便于工程使用的导热系数及比热容计算公式。
根據二相土的組成特點，研究飽和黏性土熱物理性質與其含水量、密度及孔隙比等參數問的關繫。在武漢地鐵詳勘階段，採取一級階地黏性土飽和原狀土樣，利用KD2 Pro Thermal Properties Analyzer熱參數分析儀進行熱物理性質試驗，同時測試土樣的含水茸及密度。對試驗結果進行迴歸分析，分析時假設土中水及同體顆粒骨架的熱物理性質為定值，且土中水分沒有明顯的遷移。結果錶明：黏性土導熱繫數隨原狀土樣密度的增加而增加，隨孔隙比的增加而降低：比熱容隨原狀土樣含水量的增加而增加。結閤試驗結果及同外的經驗公式．給齣瞭便于工程使用的導熱繫數及比熱容計算公式。
근거이상토적조성특점，연구포화점성토열물이성질여기함수량、밀도급공극비등삼수문적관계。재무한지철상감계단，채취일급계지점성토포화원상토양，이용KD2 Pro Thermal Properties Analyzer열삼수분석의진행열물이성질시험，동시측시토양적함수용급밀도。대시험결과진행회귀분석，분석시가설토중수급동체과립골가적열물이성질위정치，차토중수분몰유명현적천이。결과표명：점성토도열계수수원상토양밀도적증가이증가，수공극비적증가이강저：비열용수원상토양함수량적증가이증가。결합시험결과급동외적경험공식．급출료편우공정사용적도열계수급비열용계산공식。
According to the three phrase composition of saturated cohesive soil, this paper studies the relationship between thermo physical properties and density, moisture content, void ratio of soil. During the detailed explored phase of Wuhan metro engineering, experiments of thermo physical properties and soil test were conducted by taking undisturbed samples of saturated cohesive soil in first-terrace. Regression analysis are based on the assumptions that thermal physical properties of water and solid particles are constant, and the moisture migration is not significant. Results show that thermal conductivity increases with density increasing and decrease with void ratio increasing; specific heat increases with moisture content increasing. Empirical formulas are given to calculate the thermal conductivity and specific heat by analyzing, which are easy to operate in engineering design.
