摘要
十一、水电效应法1．水电效应法的原理是冲击电流发生装置(电火花振源)在灌满水的桩头上进行高压放电,其放电时间约在10μs内产生可达几吨到几十吨的脉冲作用力作用于桩头使桩产生振动,再用水听器测量桩振动的加速度,测试装置如图13。
Abstract
With the setting up of many tall buildings on the soft soil layers in recent
years, pile foundations have been extensively applied. The new technique for
laying foundations requires people to guarantee the quality of every pile and,
as a result, a series of economical, rapid and relaible methods for pile founda-
tion inspection have been developed. This paper outlines the classification,
roles and functions of piles and twelve sorts of pile inspection methods which
include theoretical formula, static load, static empirical formula, dynamic for-
mula, hammer-blow injection, mechanical impedance, stress wave analysis,
hydroelectric effect, ball-blow dynamio inspection, fundamental frequency,
acoustic wave and other logging methods and wave velocity dynamic rigidity.
The necessity of integrated utilization of various inspection methods is also
pointed out in this paper.
出处
《物探与化探》
CAS
CSCD
1990年第3期209-218,共10页
Geophysical and Geochemical Exploration
