滩涂围垦吹填地区超长钻孔灌注桩施工技术
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摘要
滩涂围垦吹填土工程力学性能差,对超长钻孔灌注桩的施工、成桩质量、单桩承载力都带来了一定的困难。桩机地基通过宕渣回填或木桩处理等方式提高地基承载力,确保桩机定位精准、方便施工。通过对护壁泥浆性能的检测、改良和优化,保证钻孔侧壁土体的稳定,确保成桩质量。采用桩端和桩侧复式后注浆,有效提高基桩的竖向承载力50%。
The bad performance of engineering mechanics of hydraulic filling in tideland reclamation brings some difficulties in extra long cast-in-situ pile construction, the quality of pile formation, the ultimate bearing capacity of single pile. By the methods of macadam backfill and wood processing, pile machine foundation approves the bearing capacity, ensures the precise location and construction of hammer apparatus. The vertical bearing capacity of the foundation piles effectively raise by 50% by compound post-grouting in pile-end and pile-side. The testing, improvement and optimization of the mud protection performance ensure the soil of bored pile side stably and the quality of pile formation.
The bad performance of engineering mechanics of hydraulic filling in tideland reclamation brings some difficulties in extra long cast-in-situ pile construction, the quality of pile formation, the ultimate bearing capacity of single pile. By the methods of macadam backfill and wood processing, pile machine foundation approves the bearing capacity, ensures the precise location and construction of hammer apparatus. The vertical bearing capacity of the foundation piles effectively raise by 50% by compound post-grouting in pile-end and pile-side. The testing, improvement and optimization of the mud protection performance ensure the soil of bored pile side stably and the quality of pile formation.
引文
[1] 张伟. 吹填施工在海洋滩涂围垦工程中的应用[J].施工技术,2009(S2):465-466.
[2] 朱梦君,梁恒昌. 滩涂区钻孔桩施工事故原因分析及处理[J].山西建筑,2010,36(10):89-90.
[3] 吴沙. 基于案例的沿海地区滩涂地基处理难点解析[J].中外建筑,2014,16(9):155-158.
[4] 张忠苗. 灌注桩后注浆技术及工程应用[M].北京:中国建筑工业出版社,2009.
[5] 陆申一. 超深钻孔灌注桩及桩底注浆施工技术[J].西部探矿工程,2007(1):40-43.
[6] 盛黎麟,楼兰忠,吴鸣鹏等. 大直径钻孔灌注桩桩底后注浆施工及质量控制[J].建筑施工,2007,29(6):387-389.
[7] 中华人民共和国行业标准编写组. 建筑桩基技术规范(JGJ 94-2008)[S].北京:中国建筑工业出版社,2008.
[2] 朱梦君,梁恒昌. 滩涂区钻孔桩施工事故原因分析及处理[J].山西建筑,2010,36(10):89-90.
[3] 吴沙. 基于案例的沿海地区滩涂地基处理难点解析[J].中外建筑,2014,16(9):155-158.
[4] 张忠苗. 灌注桩后注浆技术及工程应用[M].北京:中国建筑工业出版社,2009.
[5] 陆申一. 超深钻孔灌注桩及桩底注浆施工技术[J].西部探矿工程,2007(1):40-43.
[6] 盛黎麟,楼兰忠,吴鸣鹏等. 大直径钻孔灌注桩桩底后注浆施工及质量控制[J].建筑施工,2007,29(6):387-389.
[7] 中华人民共和国行业标准编写组. 建筑桩基技术规范(JGJ 94-2008)[S].北京:中国建筑工业出版社,2008.