超声波两种检测技术在防渗墙质量检测中的比对分析

Comparison of two kinds of ultrasonic testing technique in quality checking of cutoff wall

防渗墙施工多为水下浇筑混凝土,由于施工工艺复杂、质量影响因素多,容易出现各种墙体质量缺陷.目前常采用的防渗墙质量检测方法还是靠开挖检查、钻孔取芯和注水试验等,检测方法成本高、破坏性强、效率低。本文以江西某大型水利枢纽工程防渗墙为例,采用单孔"一发双收"和双孔"一发一收"超声波检测技术,通过比对分析,表明采用超声波检测技术可在满足工程质量检测的同时,提高检测效率,且采用两种方法测出的防渗墙质量结果一致,可推广使用.

Construction of cutoff wall is usually underwater concrete, due to the complicated construction technique and quality influenced by many factors, the cutoff wall easy to appear quality problems. The cutoff wall quality testing and evaluation method follows the traditional excavation inspection, drilling and sampling test techniques and injection test, Which is with high destructive effect and costs but low efficiency. Taking acertain water conservancy project as an example, this paper introduces comparative analysis between single transmitter to double receiver and single -emission and single -receiving. Practices show that using ultrasonic testing technique on the one hand can meeting the requirements of engineering quality detection, on the other hand, may also improve working efficiency. The results show that the detecting precision of the two methods are consistent, can popularize use.