The basic principle, advantage, disadvantage and the improvement for measuring liquid surface tension with different methods were described. The methods were capillary rise method, Wilhelmy plate method, pendent drop method, drop volume method, maximum bubble pressure method. The problems in the surface tension measurement of wide temperature and pressure range, the chosen of experimental methods and the development tendency of these were introduced especially in this paper.

本文著重介紹了幾種液體表面張力的測定方法（包括毛細(xì)管上升法欧美A级性爱、Wilhelmy盤法好好日天天干、懸滴法、滴體積法国内精品久久久电影网、最大氣泡壓力法）国产巨大超乳在线播放免费，包括這幾種方法的測定原理亚洲图区第一页、優(yōu)缺點(diǎn)及改進(jìn)方法，特別指出了寬溫度和壓力范圍的表面張力測定存在的問題在线观看中文字慕免费，實(shí)驗(yàn)方法的選擇及表面張力測定方法的發(fā)展趨勢一级操逼片儿。

Firstly we mixed five kinds of salty soils that the silt-clay content is different. Next, standard compaction test, shear test, unloaded expansion test, compression test, height and speed of capillary rise test have been done.

配制了五種粉粘粒含量不同的鹽漬土，做了土樣的擊實(shí)試驗(yàn)一级A片免费观看大全、剪切試驗(yàn)欧美亚洲日韩A级乱码、無荷載膨脹試驗(yàn)、壓縮試驗(yàn)h黄篇子免费免费在线永远看、毛細(xì)水上升試驗(yàn)和凍脹鹽脹試驗(yàn)蝌蚪窝免费视频在线观看。

Surface tension ; capillary rise method ; differential ; Wilhelmy plate method ; pendent drop method ; drop volume method ; maximum bubble pressure method

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In addition, we have also measured the contact angle that stilled water contact with powder-graphite with the capillary rise method based on Washburn's equation.

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In this paper,Laterite soil adjacent to some stake of the highway in Chenzhou, Hunan section from Xiamen to Chengdu was used to investigate the deformation characteristics and protection methods of the Laterite soil subgrade under the influence of environment factors.Properties like water-holding capacity,capillary rise, coupled heat-moisture transfer and wetting deformation of samples under different compactness were studied through a series of laboratory tests.In addition,by using meteorological data of two consecutive years in Chenzhou,coupled process of moisture transfer and subgrade deformation was stimulated under the impacts of groundwater and the atmosphere.Specific work done in this paper is as follows:(1) Samples under different compactness were subjected to a series of conventional laboratory tests,such as permeability,consolidation,contraction,shear test and etc.

論文以廈門至成都高速公路湖南郴州段的紅粘土為研究對象，以環(huán)境因素作用下紅粘土路基的變形特征與防護(hù)方法為研究目的jiZZ成熟丰满，通過室內(nèi)試驗(yàn)研究了不同壓實(shí)度紅粘土的持水性能精品一本无码久久、毛細(xì)上升、濕熱耦合遷移及濕化變形等特征无码少妇一区二区三区av，借助郴州地區(qū)連續(xù)兩年的氣象數(shù)據(jù)中国AAA片爽快免费，模擬在地下水和大氣的共同作用下路基內(nèi)部紅粘土水分遷移與路基變形的耦合過程，主要研究內(nèi)容及結(jié)論如下：(1)針對不同壓實(shí)度的紅粘土日本不卡的涩涩网站，系統(tǒng)開展了其滲透欧美韩一区、固結(jié)、收縮国产精品路边搭讪素人、剪切等試驗(yàn)研究国产福利限制影院。

Lastly, we summed up the law about the change of maximum dry density, optimum water content, angle of internal friction, cohesion, unloaded expansion capacity, compacting factor, height and speed of capillary rise, frost heave and salt expansion capacity with the change of silt-clay content. Besides, we analyzed the result.

總結(jié)了粉粘粒含量變化對土樣最佳含水量、最大干密度十八禁网站址、剪切強(qiáng)度、無荷載膨脹量手机看免费毛片的网站、壓縮系數(shù)亚洲黄色视频天涯第、毛細(xì)水上升高度及速度和凍脹鹽脹量的影響規(guī)律欧美肏屄在线观看，并進(jìn)行了量化分析。

The basic principle,advantage,disadvantage and the improvement for measuring liquid surface tension with different methods were described.The methods were capillary rise method,Wilhelmy plate method,pendent drop method,drop volume method,maximum bubble pressure method.The problems in the surface tension measurement of wide temperature and pressure range,the chos...

本文著重介紹了幾種液體表面張力的測定方法(包括毛細(xì)管上升法国产美女自慰喷水、Wilhelmy盤法激情A片网、懸滴法、滴體積法国产亚洲日韩欧美性爱视频在线、最大氣泡壓力法)亚洲黄色第一区，包括這幾種方法的測定原理、優(yōu)缺點(diǎn)及改進(jìn)方法亚洲欧美一级A片综合，特別指出了寬溫度和壓力范圍的表面張力測定存在的問題aiai视频在线观看，實(shí)驗(yàn)方法的選擇及表面張力測定方法的發(fā)展趨勢。

The following results were obtained: 1. Several multi-pore materials were compared and a nylon membrane was choosed to conduct experiments. 2. Two devices and methods for controlling negative hydraulic heads were developed. Coupled with the devices, a system for precise control of soil moisture udring pot experiment was developed. 3. Two times of pot experiment studying wheat seedling growth under precise soil moisture control were conducted. Some very important results were obtained. 4. Capillary rise, horizontal and vertical infiltration under different nagative hydraulic heads were observed. The concepts of "critical wetting distance" and "wetting coefficient" were proposed. The linear relationship between wetting front movement distance and cumulative infiltration amount was confirmed. Spatial distribution model of soil moisture and its simple derivation method were established.

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The results of the test show that the whole intensity and comprehensive stability of subgrade made a good progress because the capillary water cant rise by using the insulating layer. In the prior condition of taking insulating layer thickness as 0.2m, choosing insulating layer 0.5m, 0.8m, below the pavement, the stability of seasonal frozen soil subgrade is analyzed. The results of the test also show that the optimal position of the insulating layer is 1.0m～1.5m .

試驗(yàn)表明一级毛片不卡免费，由于隔離層的作用使得毛細(xì)水無法遷移天天综合色一级毛片中国，對路基整體的強(qiáng)度和綜合穩(wěn)定性都有了很大程度上的提高，同時(shí)試驗(yàn)還表明在隔離層厚度為0.2m的前提下色呦呦.m3u8，設(shè)置在距路面以下1.0m～1.5m位置日韩欧美国产综合在线，即路基表面以下0.5m～0.8m處對路基的穩(wěn)定性最為有利。

The working characteristics of the capillary tube are of significant importance to the whole system.

毛細(xì)管的工作特性對整個(gè)制冷系統(tǒng)的性能有著重要影響日韩午夜在线试看网站视频免费，本文圍繞毛細(xì)管中替代制冷劑的流動特性展開了理論和實(shí)驗(yàn)研究黄视频网页。