海上风电高桩承台基础内力监测与分析  

Internal Force Monitoring and Analysis of High-pile Cap Foundation for Offshore Wind Power

作　　者：曹淑刚 孙小钎 张秋生 张晗 赵乐川 CAO Shugang SUN Xiaoqian ZHANG Qiusheng ZHANG Han ZHAO Lechuan(Zhong Neng Power-teeh Development Co., Ltd , Beijing 100034 Fujian Longyuan Wind Power Co., Lid, Fuzhou 350000, China)

机构地区：[1]中能电力科技开发有限公司,北京100034 [2]福建龙源风力发电有限责任公司,福州350000

出　　处：《风力发电》2017年第4期12-17,共6页Wind Power

基　　金：中国国电集团公司科技项目（海上风力发电机组基础安全监测与评价技术研究）

摘　　要：依托某海上风电项目，对高桩承台基础摩擦桩綦、嵌岩桩基和上部承台的应力应变进行监测分析，研究结果表明：钢管桩和承台之间的力学传递效果较好，桩基应变主要为压应变；该项目中嵌岩桩基础与摩擦桩基础相比抗振动能力更强，上部塔架振动对桩基应变测值影响较小，基础安全裕度较大；对于嵌岩桩而言，桩身摩擦力仍占主导地位，嵌岩段贡献相对较小。对于上部承台，风机吊装前水平向应力主要为拉应力，后续逐渐向压应力趋势转变，并最终稳定，承台应变主要表现为压应变。The stress and strain of high-pile eap foundation are monitored and analyzed based on an offshore wind power project, including that of the friction pile, roek-socketed pile and the pile cap. The results show that the mechanical transmission between the steel pipe pile and the cap is hetter. It is mainly presented as compressive strain for the pile. Compared with the friction pile foundation, the rock-socketed pile is stronger to resist vibration in this project. The vibration of the tower has little effect on the strain of the pile and the foundation has sufficient safety factor. The friction is still dominant and the contribution of rock-embedded section is relatively small for the rock-socketed pile. For the upper cap, it is mainly performed as tensile stress in the horizontal direction before the wind turbine installation. Then it gradually turns into a trend of compression, and eventually the stress tends to be stable. The strain of the pile cap is always shown as a compressive state.

关 键 词：海上风电 高桩承台 内力监测 嵌岩桩 

分 类 号：TU753.1[建筑科学—建筑技术科学]