一个简短的讨论geotech的各种类型nical testing, their purpose, and the time frame based on their guiding standards.
如果您开始建造建筑物，道路或其他结构，您可能会想知道岩土性测试需要多长时间，如果它会导致初始项目时间表延迟？雷竞技的电竞比分网一些项目很简单，整个岩土工程调查可以在短短三周内完成。雷竞技的电竞比分网虽然更复杂的结构或苛刻的设计可能需要几个月来完成调查。我们将讨论一些最常见的岩土性测试及其时间表。雷竞技的电竞比分网这次讨论应该让您了解这些测试应该需要多长时间以及为什么。
Many Tests are Comprised of Multiple Steps
Geotechnical testing is often made up of a combination of numerous simple procedures, referred to here as building block procedures, combined to quantify the mechanical or chemical characteristics of a soil. Each of these procedures, though simple, are precise and, per their respective standard, have a designated minimum time frame.
常见的“构建块”和时间表测试
Below is a list of some of the most common procedures and a brief description of their purpose.
制备（修剪/成型）：修剪或模制试样，原因如下。首先，测试需要特定尺寸/形状的样本。这通常是某种类型的气缸或棱镜，有助于简化和标准化计算。其次，在加入添加剂（石灰，粉煤灰等）后，试样可能需要重折叠，或者我们需要样品以具有特定的水分含量和/或密度。修剪或塑造样品可以在几分钟到几小时的任何地方取决于要使用给定试样进行的测试类型。
水分含量: Determination of moisture content can be a stand-alone test, or a routine “building block” for more complex tests. The moisture content of a specimen is often performed at the beginning and end of a test procedure. This is because saturation, water absorption, and dry and wet density are all values dependent on the moisture content and important for geotechnical design. The time required to dry each specimen is dependent on the soil type. Cohesive soils take the longest amount of time to determine moisture content, where drying can range from 12-24 hours.
Saturation/moisture adjustment：饱和度和湿度调节根据正在进行的测试进行多种方式进行。这是从样品中加入或去除水的过程。某些试验需要土壤处于特定的水分含量。根据所使用的程序，饱和度或水分调整可以在几个小时到几天的任何地方服用。然而，在一些极端情况下，例如高度过度巩固的粘土，饱和时间可能需要数周完成！
Consolidation (Triaxial)：三轴合并，或者在三轴细胞内的固结是特异于固结 - 不统治（Cu）和固结排出的（CD）测试。将压力施加到样品外部以合并样品的过程不少于24小时，但可能需要花费最多10天，这取决于样本以及如何分析整合数据。
合并（1D）: Consolidation tests are used to determine the amount of vertical strain (movement) a soil undergoes when subjected to various loading conditions. This test is performed by applying a series of increasing loads in succession, followed by the removal of these loads in stages. In all, the number of loads typically range from 10 to 14. The reason this test is one of the longest performed in a geotechnical laboratory is that a single load in a one-dimensional consolidation test can take up to 24 hours. Thus, consolidation tests can take up to several weeks to complete depending upon the type of soil being tested.
额外的测试时间框架:
The following table provides timeframes for completion of other common tests. It is important to note that this data is based on an ideal time frame and tests could take longer to run depending upon the type of soil being tested and/or test variations specific to a project.
在定义项目执行测试时，考虑完成实验室测试的时间长度至关重要，因为每个测试的程序和时间表由适当的标准（ASTM，DOT，USACE，HCFCD等）决定。实验室之间的时间帧的差异可能是由于实验室内的工作积压或可能的效率低下。
雷竞技好Newbee赞助商Braun Intertec提供广泛的资源，包括任何类型的项目的岩土力学专业经验。如果您对上述测试有任何疑问，或者您正在考虑的其他测试，请联系我们。