| 超长预应力管桩施工实践 |
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| 引用本文： | 丁旭亭.超长预应力管桩施工实践[J].探矿工程,2009,36(4):51-54. |
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| 作者姓名： | 丁旭亭 |
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| 作者单位： | 浙江省岩土基础公司,浙江宁波315040 |
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| 摘 要： | 根据《先张法预应力混凝土管桩》（GB13476—1999）、浙江省建筑标准《设计结构标准图集》（2002浙G22）的规定，预应力管桩摩擦桩的长径比≯100，当用于端承桩或摩擦端承桩且须穿过一定厚度较硬土层时，其长径比≯80。理想·伊萨卡管桩工程最长的设计桩长60m，桩径为550及600mm，采用4节15m的桩连接，长径比超过100，属于超长预应力管桩且地基土层主要为粉土与砂土。通过杭州理想·伊萨卡管桩工程实例，对砂层、粉土层中超长预应力管桩的施工工艺的制定进行了有益的探索。
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| 关 键 词： | 超长预应力管桩 试成桩 管桩质量检验 焊接接桩 成桩工艺 |
| 收稿时间： | 2008/11/9 0:00:00 |
Construction Practice of Super-long Pre-stressed Tubular Pile |
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| DING Xu-ting.Construction Practice of Super-long Pre-stressed Tubular Pile[J].Exploration Engineering(Drilling & Tunneling),2009,36(4):51-54. |
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| Authors: | DING Xu-ting |
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| Institution: | DING Xu-ting (Zbejiang Provincial Geo-engineering Foundation Company, Ningho Zbejiang 315040, China) |
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| Abstract: | Based on ＂Pre-tensioned Pre-stressed Concrete Tubular Pile＂（ GB 13476 -1999）and ＂Design Structure Standard Alta＂ （2002 Zhejiang G22）, the length-diameter ratio of frictional pre-stressed tube pile should less than 100, and the length-diameter ratio of end bearing pile or frictional end beating pile should less than 80 while getting through a certain thickness in hard soil. The paper introduced an engineering case of super-long pre-stressed tubular pile in silty and sandy soil with the longest design pile length of 60m,diameter of 550mm and 600mm, connected by 4 piles of 15m, the length-diameter ratio was more than 100. Beneficial exploration was made on construction of super-long pre-stressed tube pile in sand and silt layer based on this ease in Hangzhou City. |
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| Keywords: | super-long pre-stressed tubular pile testing pile tubular pile inspection welding pile pile construction technology |
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