针对季节性冻土路基施工中的关键技术和难点，本课题有针对性地进行试验、分

针对季节性冻土路基施工中的关键技术和难点，本课题有针对性地进行试验、分析研究。总体研究路线为：搜集国内外相关资料-室内试验-现场试验研究-施工技术总结-综合分析。主要研究内容为：
（1）路基填料室内抗冻性试验。对路基填料微观结构进行分析；对不同含水率、不同含泥量及不同压实度下的路基填料的冻胀量进行分析，找出路基填料中掺入的细料的塑性与冻胀性的关系；并对路基填料冻融试验前后强度变化进行分析。
（2）路基填料现场试验。主要对地温进行测试，确定冻深；对路堤冻胀及融沉变形进行观测，对路基压力变化进行观测。
（3）对客运专线路基的成套施工技术进行总结，重点介绍施工中的难点及解决方案，特别对路基抗冻胀融化措施和地基处理措施进行分析。针对在施工过程中，经过一个冻融循环后如何保证施工质量开展研究，提出保证路基抗冻性能的技术措施。

結果 (英文) 1:

Key technical and difficult for seasonal permafrost roadbed construction, the subject of targeted tests, analysis of research. The general line of research: to collect data at home and abroad - indoor trials - Field Test Study - Summary of Construction Technique - a comprehensive analysis. The main contents:
(1) roadbed filler indoor frost resistance test. Analysis of the microstructure of the roadbed filler; different moisture content, with different clay content and compaction of the roadbed filler frost heave analysis to identify the roadbed filler incorporation fines plasticity and frost heave relations; and intensity change before and after the freeze-thaw test of subgrade filling analysis.
(2) roadbed filler field trials. Ground temperature test to determine the frozen deep; embankment frost heave and thaw deformation observations, observations on the roadbed pressure changes.
(3) summary of of Subgrade sets construction technology, highlights the difficulties and solutions in the construction, especially on the roadbed anti-frost heave of melted measures and ground treatment measures analysis. For research after a freeze-thaw cycles in the construction process, how to ensure the quality of the construction, and technical measures proposed to ensure that the subgrade frost resistance.

結果 (英文) 2:

Aiming at the seasonal frozen soil subgrade construction key technologies and difficulties, this paper pertinently test, analysis and study.Overall research route: the collection of domestic and international relevant information - indoor test field test research - - Summary of the construction technology of comprehensive analysis.The main research contents are:
(1) indoor roadbed frost resistance test.Microstructure analysis of roadbed filler; on different water content, different clay contents and different degree of compaction Subgrade Frost Heave analysis, find out the roadbed filler mixed into the thin material plasticity and frost heaving of roadbed filler; and freeze thaw test and the strength change analysis.
(2) subgrade filler field test.Mainly on the temperature test, to determine the frost heave and thaw settlement of embankment; deformation observation, observation of subgrade pressure change.
(3) on Subgrade of railway passenger dedicated line complete construction techniques are summarized, focusing on construction difficulties and the solutions, especially for Subgrade Frost Heaving thaw measures and foundation treatment measures analysis.In the construction process, after a cycle of freezing and thawing on how to guarantee construction quality research, put forward to guarantee the Subgrade Frost Resistance measures.

結果 (英文) 3:

Key technology and difficulties in the construction of subgrade in seasonal frozen soil, targeted testing, analysis of research into this subject. Study routes to collect related information at home and abroad-laboratory-research-comprehensive analysis of construction technology summary-field test. Main research contents:
(1) subgrade frost resistance of indoor tests. Analysis of subgrade microstructure; different moisture and mud and under different degrees of compaction analysis of frost heave for subgrade filling material to identify subgrade filling material in the mix with the fine relationship between material plasticity and frost heave; and an analysis of subgrade packing before and after freeze-thaw test intensity.
(2) field test of subgrade filling material. Mainly to test the temperature, determined frost; on frost heaving and thawing settlement of embankment deformation observation, observation of subgrade pressure change.
(3) summarizing the complete sets of construction technology of subgrade of passenger dedicated line, focus on the difficulties and solutions in the construction, special melted Frost heaving of subgrade and Foundation treatment measures for analysis. During the course of construction, after one freeze-thaw cycle study on how to ensure the construction quality, guarantees technical measures of subgrade frost resistance.