成功的项目全部从规划和设计开始，以施工结束，包括每一步的质量计划。对于成功的深度基础项目，这意味着质量控制和保证，以验证设计假设，并确定是否按计划安装了深度基础。为此，我们执行完整性测试，这是一组非破坏性测试，帮助工程师评估了深基础的就地条件。

深基础完整性测试最多的测试方法是什么？

雷竞技好Newbee赞助商Braun Intertec在钻孔中执行诚信测试，deep foundationssince the act of driving a pile into the ground is a form of integrity testing itself. The most common integrity tests we use with deep foundations are cross-hole sonic logging, thermal integrity profiling and low-strain pulse echo tests.

Cross-hole sonic logging

Cross-hole sonic logging (CSL) requires installing access tubes within the shafts. After the grout or concrete has reached sufficient strength, a transducer and receiver are placed inside the tubes. The time required for a sonic wave to travel from the transducer to the receiver is measured as the transducer and receiver are raised together from the bottom of the tubes. The process is repeated until all possible combinations of transducer and receiver pairings between the tubes are tested. The data is evaluated to determine if there are significant differences in arrival time or energy of the sonic wave that indicate an anomaly within the deep foundation.

Thermal integrity profiling

Thermal integrity profiling (TIP) is a test method that evaluates the amount of heat generated by concrete or grout curing to measure the integrity and quality of the foundations. This test can detect necking, bulging, cage eccentricities, pile shape and variations in cover by the relative cool or warm regions of the foundation as it cures. The temperature is measured by attaching thermal cables to the vertical elements of the foundation cage with cable ties, or by using a thermal probe and the same access tubes used with CSL.

Low-strain integrity tests

Low-strain integrity tests are performed by attaching an accelerometer to the top of a deep foundation and hitting the top with a lightweight (1- to 8-pound) hammer with a special cap. The cap on the hammer lengthens the impact pulse so that it is suitable for integrity testing. The accelerometer then measures the pile response to the induced stress wave.

然后工程师评估velocity of the pile response with time. A good test will show a clear toe reflection at the anticipated length. If the stress wave is reflected early, it can indicate necking, bulging, a void, or soil inclusion.

质量保证计划：对深基础项目至关重要

我们可以知道承包商在地面下方建立的唯一“真实方式”是挖掘它，这突破了将其放在那里的目的。全面，施工质量计划包括详细观察，负载测试和适用的完整性测试，可以为我们提供足够的信息，以应用我们对深基础系统的整体能力来满足项目要求的整体能力。

有兴趣了解深度基础的完整性测试的作用吗？点击下面的链接报名参加我们的网络研讨会，专用于深层基础专家Matt Glisson，PE和John Focht，PE。