高速公路路基加筋红层泥岩填料三轴试验研究
|
摘要
采用三轴试验主要从施工压实度方面对红层泥岩填料的物理力学特性进行研究。试验表明,压实度的提高虽然可以提高素土体的强度,但同时也降低其延性,加入土工化合物后可增加土颗粒的侧向约束、提高其围压达到改善土体路用性能的目的,同时加筋后不仅大幅提高了红层泥岩填料的峰值强度与残余强度,而且增大了峰值应变的区间并改变了土体的应力-应变模式。结合现行施工规范分别给出红层泥岩素填料及加筋填料合理的施工压实度,为确定高速公路施工压实度提供了可靠的数据支持。
Physical properties of red-bed mudstone were studied using triaxial test with the degree of compaction as the main investigated parameter.Test result shows that by increased the degree of compaction,the plain soil strength can be increased as well,but ductility will be decreased.By adding geo-symthetic materials,the confining pressure of the grains can be increased and as a result,pavement performances can be improved.The peak strength and residual strength of the red-bed rock can be increased significantly by the reinforcement.The reinforcement also changes the stress-strain mode and increased the duration of the peak strain.With reference to the current codes,the reasonable degree of compaction of the plain soil and the reinforcing filler are suggested.The work presented provided reliable support to the determination of the degree of compaction in highway construction.
Physical properties of red-bed mudstone were studied using triaxial test with the degree of compaction as the main investigated parameter.Test result shows that by increased the degree of compaction,the plain soil strength can be increased as well,but ductility will be decreased.By adding geo-symthetic materials,the confining pressure of the grains can be increased and as a result,pavement performances can be improved.The peak strength and residual strength of the red-bed rock can be increased significantly by the reinforcement.The reinforcement also changes the stress-strain mode and increased the duration of the peak strain.With reference to the current codes,the reasonable degree of compaction of the plain soil and the reinforcing filler are suggested.The work presented provided reliable support to the determination of the degree of compaction in highway construction.
引文
[1]李俊杰,田文丰,张毅.浅析西南地区红层泥岩的物理性质及工程特性[J].岩土工程界,2009,12(12):28-32.
[2]唐前松.土工格栅在高速公路高填方路堤中的加筋应用[J].湖南交通科技,2009,35(2):7-9.
[3]邓书连,周宇其.土工格栅在高填方路基中的应用[J].公路与汽运,2007,9(5):94-95.
[4]孙乔宝,刘涌江,李华昆,等.安楚高速公路红层软岩公路路堤病害处治方法[J].公路交通科技,2005,22(6):50-53.
[5]魏永幸.利用红层泥岩填筑高速铁路路基技术的试验研究[J].铁道工程学报,2009,12(12):39-43.
[6]颜春.填方路基不均匀沉降原因分析及处治措施[J].重庆交通学院学报:自然科学版,2003,22(1):63-68.
[7]郑治,曾忠.西部地区高填方路堤沉降病害调查与分析[J].公路交通科技,2005,22(S2):111-114.
[8]王建,姚令侃,陈强.汶川地震路堤成灾模式及土工格栅加筋变形控制研究[J].岩石力学与工程学报,2010,29(S1):3387-3394.
[9]中交规划设计院.JTG F10—2006公路路基施工技术规范[S].北京:人民交通出版社,2006.
[10]交通部公路科学研究院.JTG E40—2007公路土工试验规程[S].北京:人民交通出版社,2007.
[11]喻泽红,魏红卫,邹银生.加筋红砂岩风化土强度和变形特性[J].岩石力学与工程学报,2005,24(15):2770-2779.
[2]唐前松.土工格栅在高速公路高填方路堤中的加筋应用[J].湖南交通科技,2009,35(2):7-9.
[3]邓书连,周宇其.土工格栅在高填方路基中的应用[J].公路与汽运,2007,9(5):94-95.
[4]孙乔宝,刘涌江,李华昆,等.安楚高速公路红层软岩公路路堤病害处治方法[J].公路交通科技,2005,22(6):50-53.
[5]魏永幸.利用红层泥岩填筑高速铁路路基技术的试验研究[J].铁道工程学报,2009,12(12):39-43.
[6]颜春.填方路基不均匀沉降原因分析及处治措施[J].重庆交通学院学报:自然科学版,2003,22(1):63-68.
[7]郑治,曾忠.西部地区高填方路堤沉降病害调查与分析[J].公路交通科技,2005,22(S2):111-114.
[8]王建,姚令侃,陈强.汶川地震路堤成灾模式及土工格栅加筋变形控制研究[J].岩石力学与工程学报,2010,29(S1):3387-3394.
[9]中交规划设计院.JTG F10—2006公路路基施工技术规范[S].北京:人民交通出版社,2006.
[10]交通部公路科学研究院.JTG E40—2007公路土工试验规程[S].北京:人民交通出版社,2007.
[11]喻泽红,魏红卫,邹银生.加筋红砂岩风化土强度和变形特性[J].岩石力学与工程学报,2005,24(15):2770-2779.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心