我是土木工程的，现在要做毕业设计了，我的外语很差，不过学校就是要求要搞外文翻译，求外语高手帮帮我吧
Early stage elastic wave velocity of concrete piles
Ernst Niederleithinger *, Alexander Taffe
Federal Institute for Materials Research and Testing (BAM), BAM IV.4, Unter den Eichen 87, 12205 Berlin, Germany
Abstract
The low-strain pile integrity testing method is used for quality control of new piles as well as length and integrity check for old piles. If
no other methods for calibration are available, the accuracy and reliability of the techniques depend on a good estimation of the elastic
wave velocity. In practice it is assumed that piles can be tested 7 days after casting and that the velocity is almost constant in all piles of
one kind in a construction project. Recent measurements at the BAM test site in Horstwalde, Germany, showed that the 7 day criterion is
not generally applicable.
2006 Elsevier Ltd. All rights reserved.
Keywords: Non-destructive testing; Concrete piles; Pile integrity testing; Foundation
1. Introduction
Concrete piles are important parts of constructions
nowadays. If they fail, the entire construction is in danger.
Enormous assets rely on proper performance of these deep
foundations. As repair or improvement of foundations is
difficult and expensive quality control is a major issue. In
many countries non-destructive testing (NDT) methods
such as cross hole sonic logging (CSL), neutron logging
or low-strain pile integrity testing (PIT) are applied on a
regular basis, by demand of either the client or the supervising
authorities. PIT as the fastest and cheapest method
is preferred in most cases.
All methods have serious limitations. For example the
CSL method is not sensible to damages outside the reinforcement
cage. In the case of PIT there is a lack of resolution
(detection of small damages) and an ambiguity
between length deviations and quality anomalies. Some
aspects of the latter issue are discussed in this article.
我用金山软件的土木专业词汇翻译过了，可是依然有很多处不通顺的，达人帮我啦，高分回报。
因为知道上面贴不了全部内容，还有的去我百度空间看一下吧，我用金山翻译的中文版也在上面了，帮我把中文版改通顺了就行了。回复给我在空间或知道里都行，我能看到的
看了3楼的回答我很悲惨