钻孔灌注桩超深度缺陷压注混凝土处理技术与应用

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (1009 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要钻孔灌注桩超深度缺陷,可以通过压注混凝土充填钻孔灌注桩深层缺陷清洗后留下的空洞,使处理部位达到与原桩混凝土相同的品质,确保桩基础符合规范要求。该工法适用于由于塌孔或沉渣致使钻孔灌注桩桩身深层存在较厚夹层的缺陷处理。杭州湾跨海大桥北航道桥 B13 边墩 1^# 桩直径 250 cm ,桩长 96 m ,在 63.0 ～ 67.0m 处桩基混凝土存在一定缺陷。为了达到成功处理缺陷的目的,确保大桥工程质量,实施了钻孔灌注桩超深度缺陷压注混凝土处理技术。利用该工法,通过杭州湾跨海大桥北航道桥的桩基缺陷处理实践,有效地保证了桩基质量要求,且处理后桩基质量比常规静压注浆效果更好。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	王中文
	陈儒发

关键词 ：钻孔灌注桩, 超深度缺陷, 高压旋喷施工, 缺陷处理, 杭州湾跨海大桥

Abstract：After the defects of bored-cast-in-place piles at great depth are detected, the concrete around the defects is removed and then new concrete is filled by high-pressure pumping so as to keep the same quality as the original materials. This technology is originally employed in the defect treatment if an inter-layer is examined in bored-cast-in-place piles. For the Hangzhou Bay Bridge, defects are found around 63-67 m of the total length of 96 m in the bored-cast-in-place pile No.1 of the North Bridge for shipping through the ultrasound and CT measurements. After the application of this technology in the defect treatment of the pile, the pile capacity is effectively strengthened to keep the same quality as that of the original concrete compared with the commonly used concrete grouting.

Key words： bored cast-in-place pile defect at extreme depth high-pressure jet grouting defect treatment Hangzhou Bay Bridge

收稿日期: 2011-08-02

TU473

作者简介: 王中文 (1965 – ) ,男,湖南澧县人,博士研究生,教授级高级工程师,主要从事桥梁工程与结构安全研究。

引用本文:

王中文, 陈儒发. 钻孔灌注桩超深度缺陷压注混凝土处理技术与应用[J]. 岩土工程学报, 2011, 33(sup2): 197-204. WANG Zhong-wen , , CHEN Ru-fa. Treatment technology and application of bored-cast-in-place piles with defect at extreme depth by means of concrete pumping. Chinese J. Geot. Eng., 2011, 33(sup2): 197-204.

链接本文:

http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/ 或 http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/Y2011/V33/Isup2/197

[1] 李海城 , 刘佳 , 周新江 . 桥梁钻孔灌注桩质量缺陷处理方法的探讨 [J]. 公路交通科技 , 2008, 37 (1): 119 – 120. (LI Hai-cheng, L iu Jia, Z hou Xin-jiang. Study on the consolidation method for the defect of bored cast-in-place pile of bridge[J]. Chinese Journal of Highway and Transportation Research and Development, 2008, 37 (1): 119 – 120. (in Chinese))
[2] 张宏 , 陈信春 , 陈儒发 . 超声波法全程监控超长桩断桩处理的应用研究 [J]. 岩土工程学报 , 2008, 30 (3): 420 – 424. (Z hang Hong, C hen Xin-chun, Chen Ru-fa. Application of the ultrasonic method to monitoring the whole process of treating super-long broken piles[J]. Chinese Journal of Geotechnical Engineering, 2008, 30 (3): 420 – 424. (in Chinese))
[3] 宋人心 , 王五平 , 傅翔 , 等 . 灌注桩声波透射法缺陷分析方法——阴影重叠法 [J]. 中南公路工程 , 2006, 31 (2): 77 – 92. (S ong Ren-xin, W ang Wu-ping, F u Xiang, et al. The shadow overlapping method — an defect analysis method for filling pile test with ultrasonic cross-hole testing[J]. Central South Highway Engineering, 2006, 31 (2): 77 – 92. (in Chinese))
[4] 陈秋楠 , 张永兴 . 桥梁桩基础缺陷复合检测及其加固新方法 [J]. 岩石力学与工程学报 , 2004, 23 (20): 3518 – 3522. (C hen Qiu-nan, Zhang Yong-xing. Composite examination and new consolidation method for defect of in-situ bored pile of bridge[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23 (20): 3518 – 3522. (in Chinese))
[5] 许四发 . 固结注浆法处理事故桩工程实录 [J]. 重庆建筑大学学报 , 2001, 23 (5): 81 – 84. (X u Si-fa. A construction example of pile amending by consolidation grouting[J]. Journal of Chongqing Jianzhu University, 2001, 23 (5): 81 – 84. (in Chinese))
[6] 张宏 . 灌注桩检测与处理 [M]. 北京 : 人民交通出版社 , 2001. ( ZhAng Hong. detection and treatment of filling pile[M]. Beijing: China Communications Press, 2001. (in Chinese))
[7] 郭晓山 . 桩基事故处理技术探讨 [J]. 煤田地质与勘探 , 2001, 29 (3): 36 – 38. ( Guo Xiao-shan. Treatment technology of pile base accident[J]. Coal Geology and Exploration, 2001, 29 (3): 36 – 38. (in Chinese))
[8] 王俊兵 . 处理灌注桩质量缺陷的压浆加筋法介绍 [J]. 地质科技情报 , 1999, 18 ( 增刊 ): 63 – 65. ( Wang Jun-bing. Introduction to pressured grout and reinforcement of dealing with the defect in drilled piles[J]. Geological Science and Technology Information, 1999, 18 (S0): 63 – 65. (in Chinese))
[9] C lark J I. The settlement and bearing capacity of very large foundations on strong soils[J]. Can Geotech J, 1998, 35 (1): 131 – 145.
[10] 桩基工程手册编写委员会 . 桩基工程手册 [M]. 北京 : 中国建筑工业出版社 , 1995. (Compile Committee of Pile Foundation. Pile foundation[M]. Beijing: China Architecture and Building Press, 1995. (in Chinese))
[11] 李伟杰 , 李清油 . 切割旋喷法提高桩基承载力 . 工程科技 , 2009, 2: 16 – 20. ( Li Wei-jie, Li Qing-you. Incised jet grouting technology to increase pile capacity. Engineering Technology, 2009, 2 : 16 – 20. (in Chinese))