25 August 1987, Volume 8 Issue 3

    

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  Frost Heaving Classifications of the Coarse Grained Soil

  Wang Zheagqiu

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 195-200. https://doi.org/10.7522/j.issn.1000-0240.1986.0022

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  Analysing the frost heaving characteristics and main affecting factors on them, such as granular composition, moisture, ground water, the author indicated that the content of less than 0.05 mm grain can be used as a criterion of frost heave of coarse grained soil. He suggested that the five percent of less than 0.05 mm grain might be a limit for non-heave of coarse soils.
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  A Frost Heave Classification of Canal Base-soil with Concrete Lining and the Measures Against Frost Damage

  Zhu Dafu, Lin Suxing

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 201-208. https://doi.org/10.7522/j.issn.1000-0240.1986.0023

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  Based on the results obtained from both laboratories and field investigations, the authors provide a frost heave classification of canal base-soil with concrete lining and summarize some comprehensive measures for preventing irrigation canal from frost damage.
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  Some Characteristics of Unsaturated Clay During Freezing

  Chen Xiaobai, Wang Yaqing, Tao Zhaoxiang

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 209-216. https://doi.org/10.7522/j.issn.1000-0240.1986.0024

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  Experimental results show that unfreezing water content, freezing point, hydro-conductivity and diffusivity of clay vary with its original water content and can be expressed by empirical formulas. There is a dehydration process in the zone below frost fringe. Under the condition with the ground-water table of less than 100 cm and the frost penetration rate from 2 to 4 cm/day, the frost heave rate of clay at a given level is constant. The shallower the water level is, the less the changes of suction force below frost front and the stronger the frost heave are. Under relative deeper ground-water table and greater penetration rate, the frost heave decreases because water supply is not sufficiently.
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  Influence of Moisture Condition on Frost Heave in Clay

  Xu Bomeng, Lu Xinliang

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 217-222. https://doi.org/10.7522/j.issn.1000-0240.1986.0025

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  Using the data obtained from two observation fields in Changchun district, the authors discussed the influence of ground water table and moisture content on frost heave and shrink of clay during freezing, and the distribution of frost heave along depth.
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  A Discussion on Critical Water Content of Frcst Heave

  Chen Jinzhuang

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 223-226. https://doi.org/10.7522/j.issn.1000-0240.1986.0026

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  The author reviewed some information about critical water content of frost heave, and designed test apparatus. Experimental results show that the critical water content of frost heave depends on type structure density, overburden pressure and freezing point of soils.
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  Anti-heave Effect of Middle Coarse Sand Cushion

  Zhou Youcai

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 227-232. https://doi.org/10.7522/j.issn.1000-0240.1986.0027

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  The level of underground water lowers in the region of strong frost heave under frozen layer during freezing period; When the thickness of mi-dle-sized granular sand filled in base sides and base of foundation is 78% of frost depth of foundation, the frost heave force will be decreased 45-54%; But when frost depth of foundation is entirely filled with middle-sized granular sand, the frost heave force will be decreased 84-88%.
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  An Experimental Study on Frost Susceptibility of Wind-blown Sands

  Chen Xiaobai, Pen Wanwei, Wang Yaqin

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 233-238. https://doi.org/10.7522/j.issn.1000-0240.1986.0028

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  Experimental results show that the frost heave ratio of most wind-blown sands with the content of 5% of <0.05 mm particles under the natural frost penetration rate of 1.5 to 2.5cm per day is less than 4%, so, most of them are good anti-heave meterials as a lining cushion of canal. The thickness of replacement clayey base with fine sands shouldbe almost the same as the maximum frost depth when the clayey base is impermeable。
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  A Discussion on Anti-heave Effect of Wind-blown Sands in Irrigation Canal with Concrete Lining

  Zhu Dafu, Lin Suxing

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 239-244. https://doi.org/10.7522/j.issn.1000-0240.1986.0029

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  After analysing the experimental results both indoor and field, and the engineering practice in Xinjiang area, the authors discussed the characteristics of wind-blown sands as an anti-frost heave cushion, the measures by replacing frost susceptibility soil with the sands, as well as the criteria for frost heave classification of coarse grading materials。
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  On Stability Analyses of Soil Slop in Irrigation Canal with Plastic Film Lining

  Zhou Lin

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 245-248. https://doi.org/10.7522/j.issn.1000-0240.1986.0030

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  The Problem on Frost Depth of Soil and Shallow Burying of Foundation

  Xu Bomeng

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 249-252. https://doi.org/10.7522/j.issn.1000-0240.1986.0031

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  Based on some observation results, the author gives some definitions on frost depth indexes, discusses the relationship between frost heave and frost depth, and the problem on burying depth of foundation. He suggestes that the building foundation can be buried shallowly in the regions with strong frost susceptibility。
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  A Discussion on Maximum Seasonal Frost Depth of Ground

  Pang Guoliang

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 253-254. https://doi.org/10.7522/j.issn.1000-0240.1986.0032

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  Approximate Calculation of the Normal Frost Heaving Force Acting on the Base of Foundations

  Xu Zhenghai

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 255-260. https://doi.org/10.7522/j.issn.1000-0240.1986.0033

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  Based on the laboratory and field test results and theoretical analysis, an approximate equation for calculating the normal frost heaving force acting on the base of foundations was presented. Some necessary assumptions and simplifications were made in the derivation of this equatiou so that the complicated mechanical problem of frozen soil discused here can be easily solved with the only requirement of knowing a few parameters. The calculation steps basically included the calculation of the "pure" and the total (including "pure" and "supplementary") normal frost heaving forces and the determination of the buried depth corre ction factor a and the fixed degrel correction factor β.
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  The Design for an Insulated Foundation of Culvert and Sluice

  Yu Bofang, Qu Xiangmin

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 261-266. https://doi.org/10.7522/j.issn.1000-0240.1986.0034

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  An Introduction of Anti-heave Bridge with Anchor Striped Foundation

  Huang Zuhuan

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 267-270. https://doi.org/10.7522/j.issn.1000-0240.1986.0035

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  An Arch and Hollow Foundation for Anti-heave

  Zhong Zhihua

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 271-274. https://doi.org/10.7522/j.issn.1000-0240.1986.0036

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  Frost Crack of Buildings and Its Treatment Methods in Cold Regions

  Tang Shuchun

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 275-280. https://doi.org/10.7522/j.issn.1000-0240.1986.0037

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  The frost crack of buildings reduced by frost heave and thawing settlement can be devided stable and unstable type. The reason why frost crack happens, engineering examples and its treatment methods have been discussed in this paper.
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  A Analysis about Frost-crack Damage of Retaining Wall

  Xia Zhaojun

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 281-286. https://doi.org/10.7522/j.issn.1000-0240.1986.0038

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  A lot of investigations about frost-crack damage of retaining wall had been made in the north parts of our country. The author has found outthe charaeteristics and regularities of the damage in small hydraulic engineering structures by using stress analysis, and has sumarised some experience and measures for preventing retaining wall from frost-crack damage.
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  A Discussion on Crevasse in Frozen Earth

  Pang Guoliang

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 287-290. https://doi.org/10.7522/j.issn.1000-0240.1986.0039

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  Salt and Frost Heave Damage of Lining of Hydraulic Structure in the Irrigation System Manass River Basin

  Wang Yizhong

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 291-294. https://doi.org/10.7522/j.issn.1000-0240.1986.0040

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  Analysis on the Effect of the Measures Against Frost Damage Used in the Construction of Hydraulic Structures in the East Main Canals of the Fangcao Lake

  Wei Guangli

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 295-298. https://doi.org/10.7522/j.issn.1000-0240.1986.0041

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  Frost Damage and Its Preventive Measures of Hydraulic Structures in the wujiaqu Irrigation Area, Xinjiang

  Qi Zhixue, Wang Xueweng

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 299-304. https://doi.org/10.7522/j.issn.1000-0240.1986.0042

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  Preliminary Analyses on the Frost Damage of Northern Main Canal with Concrete Lining in Changma Irrigation Region, Gansu

  Luo Yushen

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 313-318. https://doi.org/10.7522/j.issn.1000-0240.1986.0045

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  In this paper, the author described the geological and structural condition of North Main Canal with concrete lining in Changma Irrigation Region. He provided some information about the silt pollution of gravel cushion, the change of ground water table, the moisture profile, the frost heave condition, and the effect of poplars on preventing canal from frost damage.
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  Design and Application of Frost Test Instrument Named DM-10

  Xie Yinqi, Wang Jianguo

  JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY. 1986, 8(3): 319-324. https://doi.org/10.7522/j.issn.1000-0240.1986.0046

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  DM-10 frost test instrument was made by semi-conductor cooler with automatic temperature controller. Its basic principe, construction, characteristics and applications are discussed in this paper.