铁道学报
鐵道學報
철도학보
2015年
8期
66-71
,共6页
铁路路基%连续压实控制%压实薄弱区域%最近邻指数%连续压实指标
鐵路路基%連續壓實控製%壓實薄弱區域%最近鄰指數%連續壓實指標
철로로기%련속압실공제%압실박약구역%최근린지수%련속압실지표
railway subgrade%continuous compaction control%compaction weak areas%nearest neighbor index%continuous compaction value
压实薄弱区域评价是铁路路基填筑工程连续压实质量控制与验收的重要内容。本文针对现行压实薄弱区域评价体系未综合考虑薄弱区域压实指标、面积以及空间分布的问题，提出压实体积的概念并定义薄弱区域压实指标、面积综合评价指标U，引入地统计学中的最近邻指数法并确定薄弱区域空间分布评判指标 R。结合沪昆高速铁路路基试验段现场试验数据，比较现行压实薄弱区域评价指标与新指标U、R的评价结果，结果表明：综合使用指标U、R能够较全面地评价薄弱区域质量，新指标U、R的验收目标值分别为1％和0．5。本文研究为进一步完善铁路路基填筑工程连续压实质量评价体系提供了新方法。
壓實薄弱區域評價是鐵路路基填築工程連續壓實質量控製與驗收的重要內容。本文針對現行壓實薄弱區域評價體繫未綜閤攷慮薄弱區域壓實指標、麵積以及空間分佈的問題，提齣壓實體積的概唸併定義薄弱區域壓實指標、麵積綜閤評價指標U，引入地統計學中的最近鄰指數法併確定薄弱區域空間分佈評判指標 R。結閤滬昆高速鐵路路基試驗段現場試驗數據，比較現行壓實薄弱區域評價指標與新指標U、R的評價結果，結果錶明：綜閤使用指標U、R能夠較全麵地評價薄弱區域質量，新指標U、R的驗收目標值分彆為1％和0．5。本文研究為進一步完善鐵路路基填築工程連續壓實質量評價體繫提供瞭新方法。
압실박약구역평개시철로로기전축공정련속압실질량공제여험수적중요내용。본문침대현행압실박약구역평개체계미종합고필박약구역압실지표、면적이급공간분포적문제，제출압실체적적개념병정의박약구역압실지표、면적종합평개지표U，인입지통계학중적최근린지수법병학정박약구역공간분포평판지표 R。결합호곤고속철로로기시험단현장시험수거，비교현행압실박약구역평개지표여신지표U、R적평개결과，결과표명：종합사용지표U、R능구교전면지평개박약구역질량，신지표U、R적험수목표치분별위1％화0．5。본문연구위진일보완선철로로기전축공정련속압실질량평개체계제공료신방법。
Evaluation of compaction weak areas is an important part in railway subgrade compaction quality con‐trol and acceptance .In view of the disadvantage that the existing evaluation system of compaction weak areas does not include the characteristics of measurement value ,area and spatial distribution of weak areas ,the con‐cept of "compaction volume"was proposed and the weak area index and area comprehensive evaluation indicator U was defined .The nearest neighbor index method in geo‐statistics was introduced to determine the weak area spatial distribution evaluation index R .Using the test data of subgrade test section of Shanghai‐Kunming high speed railway ,a comparison was made on the evaluation results between the existing compaction weak area e‐valuation indicators and new indicators U and R. The results proved the applicability and advantages of U and R when the two indicators evaluated the compaction quality of weak areas together .The acceptance target values of comprehensive indicators U and R were determined to be 1% and 0 .5 respectively .The results provided a new reference for the evaluation system of the continuous compaction quality of railway subgrade .
