高压旋喷注浆法在建筑物桩基托换加固中的应用
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摘要
针对兰州某小区商住楼已形成不均匀沉降的地基,根据场地施工条件、地基条件和建筑物的结构特征,对该工程地基选择了高压旋喷注浆法进行加固,加固结果表明:加固前及加固初期地基沉降速率较大,加固施工完成后沉降速率变小,加固完成两个月后沉降稳定,加固效果良好。通过该工程实践表明:高压旋喷注浆法在复杂地基中对既有建筑物的加固处理虽然是可行的,但同时必须根据地基土的特点采取相应的切实可行的技术措施,才能使地基加固处理达到预期的效果。其加固原理既有旋喷桩的托换加固之功效,又有静压注浆加固之作用。
The community buildings have sub-grades that sinks asymmetrically because it consists of much breaking sandstones.Considering the given situation of the engineering condition,sub-grade and structure characteristic of the buildings,the sub-grade is reinforced with the high pressure jet grouting method,and some special measurements are carried out to ensure the technology of making holes,infusing mud and construction procedure.Before and during the reinforcement,the sub-grade sinks quickly.However,after the reinforcement,the velocity of settlement becomes slower.And two months later,the sub-grade becomes steady.The reinforcement engineering confirms that the high pressure jet grouting method can be used effectively to reinforce complex foundations of the existing buildings,but to achieve the anticipant result,practicable technique should also be taken according to the characteristics of the foundation soil at the same time.The principle of the reinforcement has the function of the replaced reinforcement of the revolving and spurting column as well as the function of the static pressure afflux,it can be taken as the lesson for other engineering.
The community buildings have sub-grades that sinks asymmetrically because it consists of much breaking sandstones.Considering the given situation of the engineering condition,sub-grade and structure characteristic of the buildings,the sub-grade is reinforced with the high pressure jet grouting method,and some special measurements are carried out to ensure the technology of making holes,infusing mud and construction procedure.Before and during the reinforcement,the sub-grade sinks quickly.However,after the reinforcement,the velocity of settlement becomes slower.And two months later,the sub-grade becomes steady.The reinforcement engineering confirms that the high pressure jet grouting method can be used effectively to reinforce complex foundations of the existing buildings,but to achieve the anticipant result,practicable technique should also be taken according to the characteristics of the foundation soil at the same time.The principle of the reinforcement has the function of the replaced reinforcement of the revolving and spurting column as well as the function of the static pressure afflux,it can be taken as the lesson for other engineering.
引文
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[2]王珊,刘宝兴,王晓东,等.岩土工程新技术实用全书[M].北京:银声音像出版社,2004.
[3]龚立华,卢学文,邓裕荣,等.岩土工程施工方法[M].沈阳:辽宁科学技术出版社,1994.
[4]程良奎,张作楣,杨志银,等.岩土加固实用技术[M].北京:地震出版社,1994.
[5]顾晓鲁,钱鸿缙,刘惠珊,等.地基与基础[M].北京:中国建筑工业出版社,1993.
[6]高德彬,倪万魁,郭社锋.延安市凤凰山东北麓滑坡危险斜坡的变形特征及稳定性分析[J].地球科学与环境学报,2004,26(4):25 29.
[7]李寻昌,门玉明,刘妮娜,等.注浆法在黄土地区公路路基处理中的应用[J].地球科学与环境学报,2004,26(1):15 18.
[8]李萍,薛振年,王治军,等.陇东地区黄土工程地质特征[J].地球科学与环境学报,2004,26(2):35 38.
[9]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):33 37.
[10]张发明,陈祖煜,弥宏亮.深开挖岩石边坡三维随机楔体的稳定性分析[J].地球科学与环境学报,2002,24(2):13 16.
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