独立柱基础托换与结构加固技术研究
|
摘要
近年来，随着国民经济的高速增长，建设项目迅速发展，同时也存在相当一部分已有建筑物由于其使用价值和历史价值不允许拆除，但又必须进行结构加固和建筑功能扩建的工程，这就促进了一种既古老而又有发展前景的“新”技术——基础托换及结构加固技术的迅速发展。
本文结合工程实例，拟就独立柱基础托换及结构加固技术进行理论上的探讨、设计方面的创新、先进技术的推广和应用、施工经验的总结等各方面的研究，为同类工程提供一些可借鉴的施工经验。
本文首先对于基础托换与结构加固技术的目的和意义、国内外发展状况进行了综合阐述；其次对该项技术工程分类及适应范围进行了理论上的分析研究；然后结合工程实例对该项技术进行了方案设计，对比几种不同的托换方案和节点及构造设计，提出了“通筋穿柱法”做承台梁，“抗弯抗剪锚筋法”强化柱加固效果，“钢板箍法”做地基梁钢筋连接点等多项技术；在施工方案的研究和实施过程中，对于工程施工组织进行综合阐述，并就人工挖孔桩、承台梁、地下加层及结构加固、整体结构稳定等专项施工方案提出有针对性的施工技术措施，人工挖孔桩施工采用钢筋砼护壁确保挖孔桩的安全成型，使用柔性连接钩进行钢筋笼吊装简化施工工序；承台梁施工采用梁主筋横穿柱身化学胶锚固等；地下加层综合施工技术采用土方分层对称平衡开挖，分段挖土做筏基结构自稳等；最后对于该工程实施后的效果分析，说明该项综合施工技术的可行性。
In recent years, along with the high increase of national economy, construction projects are quickly developing. At the same time, there are a number of buildings not to be allowed to dismantle, quite the contrary, to have to carry out structure stabilization and function extension because of their use value and historical value. This have promoted the method of foundation underpinning and structure stabilization, a new technology with a long history, but also a bright prospect.
Combining with the project example, this paper made some studies on the foundation underpinning and structure stabilization technology, covering the theoretically discussion, and design innovation , and advanced technique's application and dissemination and the summary of construction experiences,etc., in order to provide reference for similar project in the future.
This paper first expound the purpose and significance of foundation underpinning and sturcture stabilization, and its domestic and international development status quo. Secondly, this paper made some theoretic researches on its engineering classfication and applicable scope for this technology; then combining with project example, this paper carried out scheme design for this technology, and compared some different kinds of underpinning scheme and node and structure design, and put forward the Method of "reinforcce steel bar through column" to build pile cap beam, " resistant bend and shear anchored reinforce steel bar" to strengthen column consolidation effect, and the method of "steel plate hoop" to build reinforcing bar connection of the foundation beam,etc. In the process of the consturction scheme research and implement , This paper synthetically elaborated the organizaton for project construction, put forward the construction technical measure of specific aim on the artificial pile, and pile cap beam, and underground adding layer and structure stabilization, and overall structure stabilization and so on. For this project, adopt reinforcing bar concrete to brace hole wall to ensure the safety of engineering in the artificial pile construction, use flexible connection catch to make the cage hoisting easier to simplify the construction process, use the method of earthwork statified symmetrical balance in the process of underground adding layer excavation. In the end, this paper made pratical effect analysis for this project, and monitoring result showed this comprehensive construction technology feasibility.
本文结合工程实例，拟就独立柱基础托换及结构加固技术进行理论上的探讨、设计方面的创新、先进技术的推广和应用、施工经验的总结等各方面的研究，为同类工程提供一些可借鉴的施工经验。
本文首先对于基础托换与结构加固技术的目的和意义、国内外发展状况进行了综合阐述；其次对该项技术工程分类及适应范围进行了理论上的分析研究；然后结合工程实例对该项技术进行了方案设计，对比几种不同的托换方案和节点及构造设计，提出了“通筋穿柱法”做承台梁，“抗弯抗剪锚筋法”强化柱加固效果，“钢板箍法”做地基梁钢筋连接点等多项技术；在施工方案的研究和实施过程中，对于工程施工组织进行综合阐述，并就人工挖孔桩、承台梁、地下加层及结构加固、整体结构稳定等专项施工方案提出有针对性的施工技术措施，人工挖孔桩施工采用钢筋砼护壁确保挖孔桩的安全成型，使用柔性连接钩进行钢筋笼吊装简化施工工序；承台梁施工采用梁主筋横穿柱身化学胶锚固等；地下加层综合施工技术采用土方分层对称平衡开挖，分段挖土做筏基结构自稳等；最后对于该工程实施后的效果分析，说明该项综合施工技术的可行性。
In recent years, along with the high increase of national economy, construction projects are quickly developing. At the same time, there are a number of buildings not to be allowed to dismantle, quite the contrary, to have to carry out structure stabilization and function extension because of their use value and historical value. This have promoted the method of foundation underpinning and structure stabilization, a new technology with a long history, but also a bright prospect.
Combining with the project example, this paper made some studies on the foundation underpinning and structure stabilization technology, covering the theoretically discussion, and design innovation , and advanced technique's application and dissemination and the summary of construction experiences,etc., in order to provide reference for similar project in the future.
This paper first expound the purpose and significance of foundation underpinning and sturcture stabilization, and its domestic and international development status quo. Secondly, this paper made some theoretic researches on its engineering classfication and applicable scope for this technology; then combining with project example, this paper carried out scheme design for this technology, and compared some different kinds of underpinning scheme and node and structure design, and put forward the Method of "reinforcce steel bar through column" to build pile cap beam, " resistant bend and shear anchored reinforce steel bar" to strengthen column consolidation effect, and the method of "steel plate hoop" to build reinforcing bar connection of the foundation beam,etc. In the process of the consturction scheme research and implement , This paper synthetically elaborated the organizaton for project construction, put forward the construction technical measure of specific aim on the artificial pile, and pile cap beam, and underground adding layer and structure stabilization, and overall structure stabilization and so on. For this project, adopt reinforcing bar concrete to brace hole wall to ensure the safety of engineering in the artificial pile construction, use flexible connection catch to make the cage hoisting easier to simplify the construction process, use the method of earthwork statified symmetrical balance in the process of underground adding layer excavation. In the end, this paper made pratical effect analysis for this project, and monitoring result showed this comprehensive construction technology feasibility.
引文
[1] 陈国政，危房桩式托换地基加固实例，岩土工程师．第四期，1992
[2] 陈仲颐 叶书麟主编，基础工程学，北京．中国建筑工业出版社，1990
[3] 地基处理手册编写委员会，地基处理手册，北京．中国建筑工业出版社，1988
[4] 叶书麟等，地基处理与托换技术，北京．中国建筑工业出版社，1994
[5] 叶书麟等，基础托换技术，北京．中国铁道出版社，1991
[6] 彭振斌主编，托换工程设计计算与施工，北京．中国地质大学出版社，1997
[7] 唐念慈，韩选江主编，建筑物增层改造托换应用，南京．南京大学出版社
[8] 桩基工程手册编写委员会，桩基工程手册，北京．中国建筑工业出版社，1995
[9] 《建筑施工手册》(第三版)编写组，建筑施工手册，北京．中国建筑工业出版社，1999
[10] 唐业清，房屋增层改建地基基础的评价与加固方法专辑，铁道学报，1989
[11] 龚主华等，岩土工程施工方法，沈阳．辽宁科学技术出版社，1990
[12] 杨永浩，苏州虎丘塔古建筑的地基加固，特种基础工程技术，第2期，1983
[13] 叶书麟，地基处理，北京．中国建筑工业出版社，1988
[14] 钱鸿缙叶书麟等译校，基础工程手册，北京．中国建筑工业出版社，1983
[15] 中国土木工程学会土力学及基础工程学会，土力学及基础工程名词(英汉及汉英对照)(第二版)，北京．中国建筑工业出版社，1991
[16] 地基处理学术委员会，第二届地基处理学术讨论会论文集，烟台，1989
[17] 地基处理学术委员会，第三届地基处理学术讨论会论文集，杭州．浙江大学出版社，1992
[18] 岩土工程师编辑部，城市改造中的岩土工程问题学术讨论会论文集，杭州．浙江大学出版社，1990
[19] 中国建筑学会地基基础学术委员会年会论文集“复合地基”，承德，1990
[20] 中华人民共和国国家标准，建筑地基基础工程施工质量验收规范(GB50202-2002)，北京．中国计划出版社，2002
[21] 中华人民共和国行业标准，建筑桩基技术规范(JGJ94-94)，北京．中国建筑工业出版社，2003
[22] 中华人民共和国行业标准，建筑地基处理技术规范(JGJ79-2002)，北京．中国建筑工业出版社，2002
[23] Lizzi,F., The use of Root Pattern Piles in the underpinning of Monuments and Old Buildings and in the Consolidation of Historic Centres, 1980
[24] Lizzi,F. , The Reticulated Root Piles for the Improvement of Soil Resistonce Physical Aspects Design Approaches, 1983
[25] Winkerkorn, H.F. and Fang, H.Y., Foundation Engineering Hangbook, 1975
[26] Thorburn, S. and Hutchison, J. F., Underpinning surrey University Press, Glasgon and London, 1985
[2] 陈仲颐 叶书麟主编，基础工程学，北京．中国建筑工业出版社，1990
[3] 地基处理手册编写委员会，地基处理手册，北京．中国建筑工业出版社，1988
[4] 叶书麟等，地基处理与托换技术，北京．中国建筑工业出版社，1994
[5] 叶书麟等，基础托换技术，北京．中国铁道出版社，1991
[6] 彭振斌主编，托换工程设计计算与施工，北京．中国地质大学出版社，1997
[7] 唐念慈，韩选江主编，建筑物增层改造托换应用，南京．南京大学出版社
[8] 桩基工程手册编写委员会，桩基工程手册，北京．中国建筑工业出版社，1995
[9] 《建筑施工手册》(第三版)编写组，建筑施工手册，北京．中国建筑工业出版社，1999
[10] 唐业清，房屋增层改建地基基础的评价与加固方法专辑，铁道学报，1989
[11] 龚主华等，岩土工程施工方法，沈阳．辽宁科学技术出版社，1990
[12] 杨永浩，苏州虎丘塔古建筑的地基加固，特种基础工程技术，第2期，1983
[13] 叶书麟，地基处理，北京．中国建筑工业出版社，1988
[14] 钱鸿缙叶书麟等译校，基础工程手册，北京．中国建筑工业出版社，1983
[15] 中国土木工程学会土力学及基础工程学会，土力学及基础工程名词(英汉及汉英对照)(第二版)，北京．中国建筑工业出版社，1991
[16] 地基处理学术委员会，第二届地基处理学术讨论会论文集，烟台，1989
[17] 地基处理学术委员会，第三届地基处理学术讨论会论文集，杭州．浙江大学出版社，1992
[18] 岩土工程师编辑部，城市改造中的岩土工程问题学术讨论会论文集，杭州．浙江大学出版社，1990
[19] 中国建筑学会地基基础学术委员会年会论文集“复合地基”，承德，1990
[20] 中华人民共和国国家标准，建筑地基基础工程施工质量验收规范(GB50202-2002)，北京．中国计划出版社，2002
[21] 中华人民共和国行业标准，建筑桩基技术规范(JGJ94-94)，北京．中国建筑工业出版社，2003
[22] 中华人民共和国行业标准，建筑地基处理技术规范(JGJ79-2002)，北京．中国建筑工业出版社，2002
[23] Lizzi,F., The use of Root Pattern Piles in the underpinning of Monuments and Old Buildings and in the Consolidation of Historic Centres, 1980
[24] Lizzi,F. , The Reticulated Root Piles for the Improvement of Soil Resistonce Physical Aspects Design Approaches, 1983
[25] Winkerkorn, H.F. and Fang, H.Y., Foundation Engineering Hangbook, 1975
[26] Thorburn, S. and Hutchison, J. F., Underpinning surrey University Press, Glasgon and London, 1985