挤扩支盘桩在输电线路工程中的应用

Application of Squeezed Branch Pile in Transmission Line Engineering

介绍输电线杆塔基础特点及挤扩支盘桩的机具构造、承载机理、适用条件、承载力估算公式,分析挤扩支盘桩的试桩情况,结合挤扩支盘桩在河北省南部电网某220kV输电线路工程中的实际应用情况,对挤扩支盘桩与普通桩的承载力和经济性进行比较分析,认为挤扩支盘桩应用于输电线路工程,具有承载力好、材料用量少、工程造价低等特点,并提出采用超声波孔壁测定仪对挤扩成孔效果进行监测的建议。

This paper introduces based features of the trans-mission line , the machines construction and hosted mecha-nism ,applies conditions ,and hosted force estimates formula of squeezed branch pile ,analyzes try pile situation of squeeze spread support disc pile ,compares and analyzes the hosted force and economy between squeeze spread support disc pile and normal pile ,combined with real application condition of squeeze spread support disc pile in Hebei Southern Grid 220 kV transmission line construction ,gets the conclusion that squeeze spread support disc pile has three advantages ,that are well hosted force ,little material quantity ,and low con-struction cost in transmission construction ,and proposes the suggestion to use ultrasonic hole wall determination instru-ment to monitor the squeeze spread hole result .