南通地区软基稳定性评价及防治对策研究
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摘要
本文主要通过对江苏南通九华—海门段高速公路所通过区域软土的工程地质性质以及各物理力学指标之间关系进行了全面系统的分析研究，由回归分析建立了各力学指标间关系，计算出软土层的容许承载力。在这些基础上，利用瑞典条分，计算出堆载路基的稳定系数。在估算其沉降量大小时，用三种方法(e-p法、e-logp法以及a_(v1-2))进行计算和对比，得出适合该区沉降量计算方法为e-p法。三种方法计算出路基沉降量大于规范要求。
因计算出地基附加应力小于软土层的容许承载力，稳定系数小于1.25，沉降量大于30cm，所以该区软基必须进行处理。在研究软土处理方案进，分析了多种常用软基处理方法(如堆载预压、塑料板排水、粉喷桩等)的基础上，针对本区实际情况，得出塑料板排水法是处理该区软基的较好方法。
In this article the engineering geology character of soft soil and physical mechanics guidelines' relation are analyzed whole; Which the freeway of Jiuhua-Haimen Nan tong Jiangsu province has passed, and the formula of physical mechanics guidelines' relation has been establish; carrying capacity of soft soil has been calculated. The stability coefficient of roadbed has been counted by Sweden piece. At the same time, in order to compute the settlement, three methods (e-p, e-logp,avi-2) are used, the better count is that the e-p. The results of evaluating by the three methods are big.
Because the add-on stress of soft soil is little than the carrying, the stability coefficient is little than 1.25, the settlement is more than 30cm, so the soft foundation must has been treated. At last, by analyzing the common methods (prediction-reloading pi^ cement injection plastic drain board and so on), according the real thing, the plastic drain board is considered the better method to treat foundation in this area.
因计算出地基附加应力小于软土层的容许承载力，稳定系数小于1.25，沉降量大于30cm，所以该区软基必须进行处理。在研究软土处理方案进，分析了多种常用软基处理方法(如堆载预压、塑料板排水、粉喷桩等)的基础上，针对本区实际情况，得出塑料板排水法是处理该区软基的较好方法。
In this article the engineering geology character of soft soil and physical mechanics guidelines' relation are analyzed whole; Which the freeway of Jiuhua-Haimen Nan tong Jiangsu province has passed, and the formula of physical mechanics guidelines' relation has been establish; carrying capacity of soft soil has been calculated. The stability coefficient of roadbed has been counted by Sweden piece. At the same time, in order to compute the settlement, three methods (e-p, e-logp,avi-2) are used, the better count is that the e-p. The results of evaluating by the three methods are big.
Because the add-on stress of soft soil is little than the carrying, the stability coefficient is little than 1.25, the settlement is more than 30cm, so the soft foundation must has been treated. At last, by analyzing the common methods (prediction-reloading pi^ cement injection plastic drain board and so on), according the real thing, the plastic drain board is considered the better method to treat foundation in this area.
引文
[1]岩土工程技术规范．GB50021-94．中国建筑工业出版社．1994．95
[2]港口工程技术规范．JTJ219-87．人民交通出版社．1987．86～87
[3]交通部第二公路勘察设计院．路基．北京．人民交通出版社．1997．96～108
[4]公路工程技术名词．人民交通出版社．1987．36
[5]公路软土地基路堤设计与施工技术规范．JTJ017-96．北京．人民交通出版社．85～91
[6]刘宝兴．路基工程新技术实用全书(公路·铁路·机场场道)．第四卷．海潮出版社．2619
[7]《工程地质手册》编写委员会．工程地质手册第三版．中国建筑工业出版社．1992．1479
[8]高国瑞．近代土质学．东南大学出版社．1990．2．86～102
[9]沈珠江．土力学理论研究中的两个问题．岩土工程学报．1992年第3期．
[10]折学森．软土地基沉降计算．人民交通出版社．1998．200～215
[11]Gibson,R.E.,G.L.Englang&M.J.L.Hussey. The theory of one-dimensional consolidation of saturated clay(Ⅰ). Geotechnique, Vol. 17, 1967.
[12]Gibson,R.E,Schiffman,Carrgill K.W. The theory of one-Dimensional consolidation of saturated clays(Ⅱ) Geotechnique, Vol. 18,1981
[13]Lambe,T.W..Stress path method. Proc,ASCE,No. SM6,1967.
[14]Egerov ,K,E.net.al.. The observed Settlements of building as compared with Preliminary CaCalation. Proc.4th ICSMFE, Vol, 1P291,1957.
[15]黄文熙等．水工建筑物土壤地基的沉降量与地基中的应力分布．水利学报No．3．1957
[16]Davis,E.H. and Poulos,H.G. The use of elastic theory for settlement prediction under three-dimensional condition. Geotechnique Vol. 18, NO. 1,1955.
[17]魏汝龙著．软粘土的强度和变形．北京．人民交通出版社．1987．
[18]Lambe, T.W..Methods of estimating settlement. Proc.ASCE,JSMFD,Vol.90,No.SM5,1964.
[19]Skempton,A.W, and L.Bjerum. A contribution to the settlement analysis of foundation on clay. eotechnique,Vol.7,No.4,P. 168,1957
[20]Biot,M.A..General theory of three-dimensional consolidation.j.of Applied Physics, Vol. 12,155,1941.
[21]Simons.N.E.The stress path method of settlement analysis applied to London clay. Stress-strain behavior of soil G.T. Foulis & Co.ltd, 1971.
[22]Simons.N.E.The stress path method of settlement analysis applied to london clay.stress_strain behavior of soils G.T. Goulis & Co.ltd, 1971.
[23]叶书麟、叶观宝．地基处理．中国建筑工业出版社．1997．52～106，108～142
[24]龚晓南．地基处理新技术．陕西科学技术出版社．1997．79～85，101～112
[25]上海市公路学会．莘松高速公路学术论文集．1990
[26]郭灿华．充分利用软土地基“硬壳层”的研究——兼论路堤最佳填土高度．莘松高速公路学术会议论文．1990．
[27]张诚厚、袁文明、戴济群．高速公路软基处理．中国建筑工业出版社．1998
[28]上海市标准．地基处理技术规范(DBJ 08-40-94)
[29]公路桥涵地基与基础设计规范．JTJ024-85．北京．人民交通出版社．1985．10～13
[30]王引生。高速公路软土地基的沉降问题。中国公路学报，Vol．6，No．1，1993
[31]华东水利学院土力学教研室主编．土工原理与计算．水利电力出版社．1979年
[32]徐永福、陈冠军．高速公路路基软土的特性及其处理方法比较．山西交通科技．1998年8月第4期(总第119期)
[33]日本道路公团．设计要领(第一集)．昭和45年1月
[34]高速公路丛书编委会．高速公路路基设计与施工．北京．人民交通出版社．1997．92～119
[35]交通部情报所．当代公路工程技术发展水平．1983
[2]港口工程技术规范．JTJ219-87．人民交通出版社．1987．86～87
[3]交通部第二公路勘察设计院．路基．北京．人民交通出版社．1997．96～108
[4]公路工程技术名词．人民交通出版社．1987．36
[5]公路软土地基路堤设计与施工技术规范．JTJ017-96．北京．人民交通出版社．85～91
[6]刘宝兴．路基工程新技术实用全书(公路·铁路·机场场道)．第四卷．海潮出版社．2619
[7]《工程地质手册》编写委员会．工程地质手册第三版．中国建筑工业出版社．1992．1479
[8]高国瑞．近代土质学．东南大学出版社．1990．2．86～102
[9]沈珠江．土力学理论研究中的两个问题．岩土工程学报．1992年第3期．
[10]折学森．软土地基沉降计算．人民交通出版社．1998．200～215
[11]Gibson,R.E.,G.L.Englang&M.J.L.Hussey. The theory of one-dimensional consolidation of saturated clay(Ⅰ). Geotechnique, Vol. 17, 1967.
[12]Gibson,R.E,Schiffman,Carrgill K.W. The theory of one-Dimensional consolidation of saturated clays(Ⅱ) Geotechnique, Vol. 18,1981
[13]Lambe,T.W..Stress path method. Proc,ASCE,No. SM6,1967.
[14]Egerov ,K,E.net.al.. The observed Settlements of building as compared with Preliminary CaCalation. Proc.4th ICSMFE, Vol, 1P291,1957.
[15]黄文熙等．水工建筑物土壤地基的沉降量与地基中的应力分布．水利学报No．3．1957
[16]Davis,E.H. and Poulos,H.G. The use of elastic theory for settlement prediction under three-dimensional condition. Geotechnique Vol. 18, NO. 1,1955.
[17]魏汝龙著．软粘土的强度和变形．北京．人民交通出版社．1987．
[18]Lambe, T.W..Methods of estimating settlement. Proc.ASCE,JSMFD,Vol.90,No.SM5,1964.
[19]Skempton,A.W, and L.Bjerum. A contribution to the settlement analysis of foundation on clay. eotechnique,Vol.7,No.4,P. 168,1957
[20]Biot,M.A..General theory of three-dimensional consolidation.j.of Applied Physics, Vol. 12,155,1941.
[21]Simons.N.E.The stress path method of settlement analysis applied to London clay. Stress-strain behavior of soil G.T. Foulis & Co.ltd, 1971.
[22]Simons.N.E.The stress path method of settlement analysis applied to london clay.stress_strain behavior of soils G.T. Goulis & Co.ltd, 1971.
[23]叶书麟、叶观宝．地基处理．中国建筑工业出版社．1997．52～106，108～142
[24]龚晓南．地基处理新技术．陕西科学技术出版社．1997．79～85，101～112
[25]上海市公路学会．莘松高速公路学术论文集．1990
[26]郭灿华．充分利用软土地基“硬壳层”的研究——兼论路堤最佳填土高度．莘松高速公路学术会议论文．1990．
[27]张诚厚、袁文明、戴济群．高速公路软基处理．中国建筑工业出版社．1998
[28]上海市标准．地基处理技术规范(DBJ 08-40-94)
[29]公路桥涵地基与基础设计规范．JTJ024-85．北京．人民交通出版社．1985．10～13
[30]王引生。高速公路软土地基的沉降问题。中国公路学报，Vol．6，No．1，1993
[31]华东水利学院土力学教研室主编．土工原理与计算．水利电力出版社．1979年
[32]徐永福、陈冠军．高速公路路基软土的特性及其处理方法比较．山西交通科技．1998年8月第4期(总第119期)
[33]日本道路公团．设计要领(第一集)．昭和45年1月
[34]高速公路丛书编委会．高速公路路基设计与施工．北京．人民交通出版社．1997．92～119
[35]交通部情报所．当代公路工程技术发展水平．1983