冲击碾压在黄泛区地基与路基压实中的应用研究
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摘要
黄泛区缺少良好的路基填料,黄泛区粉质土是我国特有的土,该土具有特殊的工程特性。冲击碾压技术作为一种新兴的压实技术,兼具振动碾压与夯击的特点。山东省高速公路建设飞速发展的形势为冲击碾压技术的在黄泛区的应用提供了广阔的发展空间,冲击碾压技术必将有很大的发展。研究在黄泛区地基与路基压实中应用冲击碾压技术具有重要意义。
试验分析了黄泛区土的工程特性。研究发现,该土层理构造上,层状结构明显,土质主要为低液限粉土,次为低液限粘土,局部夹有淤泥层、高液限粘土层；颗粒组成上,以粉粒为主,粉粒含量一般高达90%以上,粘粒含量不足10%,局部区域粘粒含量稍高,可接近20%,为匀粒土,级配不良；土的结构上,颗粒之间空隙较大,针片状颗粒少,颗粒磨圆度高,土粒呈均匀半径球状颗粒堆积,颗粒表面破碎、剥落严重,碾压时颗粒间难以形成有效的嵌挤,难以压实且沉降量大。
分析了冲击碾压技术的特点与黄泛区公路地基与路基压实困难的原因。认为,冲击碾压技术适合黄泛区路基与地基的压实。
试验研究了冲击碾压技术在黄泛区地基压实中的应用,分析了压实度、沉降量、含水率与冲压遍数的关系。认为,黄泛区地基压实应采用沉降量与压实度双重控制的方法,地基压实控制标准为Ocm-20cm内地基压实度≥90%,沉降量≤10cm。较合适的冲击遍数为14遍左右。不连续冲压的施工工艺能在一定程度上提高压实效果,防止出现大面积弹簧翻浆现象,建议在地下水位较高时采用。
试验研究了冲击碾压技术在黄泛区路基压实中的应用,分析了压实度、沉降量、含水率、松铺厚度与冲压遍数的关系。认为,黄泛区路基冲击碾压时,较合适的松铺厚度为80cm。建立了相应的冲压遍数与压实度的关系公式,以指导路基的压实施工。
It's lack of a good roadbed fill in the Yellow River Alluvial Plain,and the Yellow River Alluvial Plain soil is a unique soil which has special engineering properties. Impact roller compaction technology, as a new compaction technology, both have the characteristics of vibrating and ramming. Expressway construction in Shandong Province is rapidly developing.This situation provides impact roller compaction technology a broad space for development,and it will achieve great development.So,it is very important to study on impact roller compaction technology to ground base and subgrade in the Yellow River Alluvial Plain.
The engineering properties of the Yellow River Alluvial Plain soil were analyzed through the test. Study finds that it has obvious layered structure and is made up with lots of low liquid limit silt,some low liquid limit clay mixed with part siltstratification and high liquid limit clay layer. It is mainly made up of silt,and the content is more than 90%. Generally,the content of clay is less than 10%,but it could be close to 20% in some area. It is epigranular and poorly graded, it has high porosiyt,low content of needle-like particles and high psephicity. Because soil particles are uniform hemispherical granule accumulation and the particle surface is crushing and spalling seriously,it's difficult to form effective embedded squeeze. This leads to difficult compaction and large settlement.
Characteristics of impact rolling technology and causes of the compaction difficulties were analyzed. Impact roller compaction technology is suitable for compaction to ground base and subgrade in the Yellow River Alluvial Plain.
Application of impact roller compaction technology to ground base in the Yellow River Alluvial Plain was researched. The relationship among degree of compaction, settlement,water content and compaction times was analyzed. The research suggests that compaction to ground base should use dual control with settlement and degree of compaction.It puts forward that the suitable impact rolling number of times is about 14.Control standards of ground base compaction is that degree of compaction between 0 cm and 20 cm should be not less than 90% and settlement should be not more than 10 cm. Because of high groundwater level,discontinuous construction can partly improve the compaction effect and prevent large-scale springing and frost boiling.
Through the test,the paper studied the application of impact roller compaction technology to subgrade in the Yellow River Alluvial Plain.The relationship among degree of compaction,settlement,water content loose laying depth and compaction times was analyzed.It puts forward that the suitable loose laying depth should be 80 cm.And the relation formula between degree of compaction and compaction times is founded,which can guide the construction of subgrade compaction.
试验分析了黄泛区土的工程特性。研究发现,该土层理构造上,层状结构明显,土质主要为低液限粉土,次为低液限粘土,局部夹有淤泥层、高液限粘土层；颗粒组成上,以粉粒为主,粉粒含量一般高达90%以上,粘粒含量不足10%,局部区域粘粒含量稍高,可接近20%,为匀粒土,级配不良；土的结构上,颗粒之间空隙较大,针片状颗粒少,颗粒磨圆度高,土粒呈均匀半径球状颗粒堆积,颗粒表面破碎、剥落严重,碾压时颗粒间难以形成有效的嵌挤,难以压实且沉降量大。
分析了冲击碾压技术的特点与黄泛区公路地基与路基压实困难的原因。认为,冲击碾压技术适合黄泛区路基与地基的压实。
试验研究了冲击碾压技术在黄泛区地基压实中的应用,分析了压实度、沉降量、含水率与冲压遍数的关系。认为,黄泛区地基压实应采用沉降量与压实度双重控制的方法,地基压实控制标准为Ocm-20cm内地基压实度≥90%,沉降量≤10cm。较合适的冲击遍数为14遍左右。不连续冲压的施工工艺能在一定程度上提高压实效果,防止出现大面积弹簧翻浆现象,建议在地下水位较高时采用。
试验研究了冲击碾压技术在黄泛区路基压实中的应用,分析了压实度、沉降量、含水率、松铺厚度与冲压遍数的关系。认为,黄泛区路基冲击碾压时,较合适的松铺厚度为80cm。建立了相应的冲压遍数与压实度的关系公式,以指导路基的压实施工。
It's lack of a good roadbed fill in the Yellow River Alluvial Plain,and the Yellow River Alluvial Plain soil is a unique soil which has special engineering properties. Impact roller compaction technology, as a new compaction technology, both have the characteristics of vibrating and ramming. Expressway construction in Shandong Province is rapidly developing.This situation provides impact roller compaction technology a broad space for development,and it will achieve great development.So,it is very important to study on impact roller compaction technology to ground base and subgrade in the Yellow River Alluvial Plain.
The engineering properties of the Yellow River Alluvial Plain soil were analyzed through the test. Study finds that it has obvious layered structure and is made up with lots of low liquid limit silt,some low liquid limit clay mixed with part siltstratification and high liquid limit clay layer. It is mainly made up of silt,and the content is more than 90%. Generally,the content of clay is less than 10%,but it could be close to 20% in some area. It is epigranular and poorly graded, it has high porosiyt,low content of needle-like particles and high psephicity. Because soil particles are uniform hemispherical granule accumulation and the particle surface is crushing and spalling seriously,it's difficult to form effective embedded squeeze. This leads to difficult compaction and large settlement.
Characteristics of impact rolling technology and causes of the compaction difficulties were analyzed. Impact roller compaction technology is suitable for compaction to ground base and subgrade in the Yellow River Alluvial Plain.
Application of impact roller compaction technology to ground base in the Yellow River Alluvial Plain was researched. The relationship among degree of compaction, settlement,water content and compaction times was analyzed. The research suggests that compaction to ground base should use dual control with settlement and degree of compaction.It puts forward that the suitable impact rolling number of times is about 14.Control standards of ground base compaction is that degree of compaction between 0 cm and 20 cm should be not less than 90% and settlement should be not more than 10 cm. Because of high groundwater level,discontinuous construction can partly improve the compaction effect and prevent large-scale springing and frost boiling.
Through the test,the paper studied the application of impact roller compaction technology to subgrade in the Yellow River Alluvial Plain.The relationship among degree of compaction,settlement,water content loose laying depth and compaction times was analyzed.It puts forward that the suitable loose laying depth should be 80 cm.And the relation formula between degree of compaction and compaction times is founded,which can guide the construction of subgrade compaction.
引文
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[2]朱志铎,刘松玉.SEU-2型固化剂稳定粉质土路基的试验研究[J].公路,2007,(7)：178-182.
[3]冯明伟.挤密碎石桩在京福高速公路中的应用[J].西部探矿工程,2006,18(6)：54-55.
[4]毛新虎.大同--运城高速公路某软基复合地基检测结果分析[J].地球科学与环境学报,2004,26(1)
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[6]吴斌.冲击碾压荷载对旧水泥路面下路基的动力响应试验研究[D].2008.
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[11]曾繁辉,李念军.冲击碾压法在低液限粉土路基施工中的应用[J].路基工程,2007,(3)：139-140.
[12]张玉.冲击压实技术在张石高速公路路基工程中的应用[J].交通世界(建养机械),2008,185(12)：156.
[13]闫仰中,王民焕.冲击碾压法在客运专线湿陷性黄土地基处理中的应用[J].科学之友,2008,(15)：54-55.
[14]王吉利,刘怡林,沈兴付等.冲击碾压法处理黄土地基的试验研究[J].岩土力学,2005,26(5)：755-758.
[15]张璐琰.冲击碾压原理及其在黄土路基施工中的应用[J].建材技术与应 用,2009,(2)：28-30.
[16]刘若琪,华遵孟,沈秋武.黄土路基冲击碾压检测成果分析[A].中国工程建设标准化协会湿陷性黄土委员会全国黄土学术会议论文集[C].2001.
[17]侯建军.冲击压实技术在岭南高速公路填前碾压中的应用[J].中外公路,2006,26(2)：34-36.
[18]郝凤仙.冲击碾压技术在高填方路基施工中的应用[J].中国公路,2007,(10)：86-87.
[19]赵炼恒,罗恒,李亮等.冲击压实技术在高速公路高填方路基中的应用研究[J].岩石力学与工程学报,2006,25(z2)：4192-4197.
[20]冲击碾压法及其在处理虹桥机场浅层软粘土地基中的应用[J].勘察科学技术,2009,(5)：25-28.
[21]周俊.软土地基冲击碾压处理技术研究[J].中国水运(下半月),2009,9(5)：164-165.
[22]吴东.冲击压实技术在葫芦岛滨海公路建设中的应用研究[J].辽宁省交通高等专科学校学报,2009,11(3)：20-22.
[23]胡昌斌,阙云.多遍冲击碾压混凝土路面时路基的动力响应分析[J].岩土力学,2009,30(8)：2517-2522.
[24]杨人凤,张永新,汤键.冲击+振动+静碾复合压实滚轮与土壤系统的动力学模型[J].长安大学学报(自然科学版),2003,23(5)：56-59.
[25]贺杰,张润利.冲击压路机型号和基本参数探讨[J].建筑机械,2001,(11)：51-53.
[26]李继光.冲击压实机冲击力及冲击能量的计算[J].许昌学院学报,2004,23(5)：25-27.
[27]张洪,孙斌煜,朱维高.滚动冲击压实技术及其机械设计研究[J].中国机械工程,1999,10(3)
[28]庞江波.禹阎高速公路湿陷性黄土地基处理技术研究[D].2009.
[29]郑良飞.冲击压实技术在黄土路基施工中的应用研究[D].2003.
[30]陈忠清.浅层粉土地基冲击碾压处理的现场试验研究及颗粒流模拟[D].2009.
[31]庞国强.冲击压路机压实效果的有限元分析法[J].机械管理开发,2003,(4)：16-17.
[32]章静敏.软粘土路基冲击压实技术及其沉降机理的研究[D].2005.
[33]杜鹃.地基冲击碾压处理技术研究[J].交通标准化,2008,(5)：16-17.
[34]王新增.冲击压实技术在郑州西南绕城高速公路上的应用[J].筑路机械与施工机械化,2004,21(12)：42-45.
[35]黄春海.冲击碾压技术在高速公路施工中的应用[J].交通科技与经济,2009,11(4)：72-74.
[36]布占朋,程跃广.冲击碾压技术在高速公路土方路基中的应用[J].中国科技信息,2009,(6)：63-65.
[37]赵斌.高速公路路基冲击式压路机冲击碾压工艺研究[D].2006.
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[44]姚占勇.黄河冲淤积平原土的工程特性研究[D].2006.
[45]姚占勇.黄泛区公路地基压实标准的研究[J].山东大学学报(工学版),2007,37(6)：79-82.
[2]朱志铎,刘松玉.SEU-2型固化剂稳定粉质土路基的试验研究[J].公路,2007,(7)：178-182.
[3]冯明伟.挤密碎石桩在京福高速公路中的应用[J].西部探矿工程,2006,18(6)：54-55.
[4]毛新虎.大同--运城高速公路某软基复合地基检测结果分析[J].地球科学与环境学报,2004,26(1)
[5]王传文.冲击压实技术及其应用研究[D].2008.
[6]吴斌.冲击碾压荷载对旧水泥路面下路基的动力响应试验研究[D].2008.
[7]Lars forssblad.Investigations of impacts on ground surface.International conference on compaction 1980,86-99.
[8]Lars forssblad.Investigations of soil compaction by vibration.The Royal Swedish Academy of Engineering sciences NO.34,231-239.
[9]王新增,李强,范培生.冲击压实技术在兰许高速公路粉质砂性土路基中的应用[J].交通科技,2005,(1)：25-27.
[10]高辉,陈燎焱.补强冲击碾压技术在粉砂土路基施工中的应用[J].山东交通科技,2007,(1)：67-77.
[11]曾繁辉,李念军.冲击碾压法在低液限粉土路基施工中的应用[J].路基工程,2007,(3)：139-140.
[12]张玉.冲击压实技术在张石高速公路路基工程中的应用[J].交通世界(建养机械),2008,185(12)：156.
[13]闫仰中,王民焕.冲击碾压法在客运专线湿陷性黄土地基处理中的应用[J].科学之友,2008,(15)：54-55.
[14]王吉利,刘怡林,沈兴付等.冲击碾压法处理黄土地基的试验研究[J].岩土力学,2005,26(5)：755-758.
[15]张璐琰.冲击碾压原理及其在黄土路基施工中的应用[J].建材技术与应 用,2009,(2)：28-30.
[16]刘若琪,华遵孟,沈秋武.黄土路基冲击碾压检测成果分析[A].中国工程建设标准化协会湿陷性黄土委员会全国黄土学术会议论文集[C].2001.
[17]侯建军.冲击压实技术在岭南高速公路填前碾压中的应用[J].中外公路,2006,26(2)：34-36.
[18]郝凤仙.冲击碾压技术在高填方路基施工中的应用[J].中国公路,2007,(10)：86-87.
[19]赵炼恒,罗恒,李亮等.冲击压实技术在高速公路高填方路基中的应用研究[J].岩石力学与工程学报,2006,25(z2)：4192-4197.
[20]冲击碾压法及其在处理虹桥机场浅层软粘土地基中的应用[J].勘察科学技术,2009,(5)：25-28.
[21]周俊.软土地基冲击碾压处理技术研究[J].中国水运(下半月),2009,9(5)：164-165.
[22]吴东.冲击压实技术在葫芦岛滨海公路建设中的应用研究[J].辽宁省交通高等专科学校学报,2009,11(3)：20-22.
[23]胡昌斌,阙云.多遍冲击碾压混凝土路面时路基的动力响应分析[J].岩土力学,2009,30(8)：2517-2522.
[24]杨人凤,张永新,汤键.冲击+振动+静碾复合压实滚轮与土壤系统的动力学模型[J].长安大学学报(自然科学版),2003,23(5)：56-59.
[25]贺杰,张润利.冲击压路机型号和基本参数探讨[J].建筑机械,2001,(11)：51-53.
[26]李继光.冲击压实机冲击力及冲击能量的计算[J].许昌学院学报,2004,23(5)：25-27.
[27]张洪,孙斌煜,朱维高.滚动冲击压实技术及其机械设计研究[J].中国机械工程,1999,10(3)
[28]庞江波.禹阎高速公路湿陷性黄土地基处理技术研究[D].2009.
[29]郑良飞.冲击压实技术在黄土路基施工中的应用研究[D].2003.
[30]陈忠清.浅层粉土地基冲击碾压处理的现场试验研究及颗粒流模拟[D].2009.
[31]庞国强.冲击压路机压实效果的有限元分析法[J].机械管理开发,2003,(4)：16-17.
[32]章静敏.软粘土路基冲击压实技术及其沉降机理的研究[D].2005.
[33]杜鹃.地基冲击碾压处理技术研究[J].交通标准化,2008,(5)：16-17.
[34]王新增.冲击压实技术在郑州西南绕城高速公路上的应用[J].筑路机械与施工机械化,2004,21(12)：42-45.
[35]黄春海.冲击碾压技术在高速公路施工中的应用[J].交通科技与经济,2009,11(4)：72-74.
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