建筑工程中桩基检测技术问题分析中英文对照Analysis and testing technology of pile foundation construction in Chinese and English.桩基是影响工程质量的基础因素,并且桩基这一影响因素还是隐性的影响因素。
作为地面建筑的一种支撑,好的桩基会让结构的基础更加的稳定,而质量劣质的桩基,会对结构的安全造成恶劣的影响。
因此,对于基础施工,桩基的检测是一个不可或缺的技术环节。
并且随着现代工程的进步,对于质量和安全系数的要求越来越高,对于特殊的结构群体,诸如高层建筑以及铁路建筑的建设中桩基技术不断的发展,因而建设工程单位所面临的要求也越来越高,越来越严格,这个时候桩基的检测技术就可以发挥出应有的作用报这个桩基质量。
Pile foundation is the basic factors influencing the engineering quality, influencing factors and the influencing factors of pile or recessive. As a supporting ground buildings, the pile will make structure more stable, and the quality inferior pile foundation, will cause bad influence on the safety of structure. Therefore, for the foundation construction, pile foundation detection is an indispensable link. And with the development of modern engineering progress, growing demand for quality and safety factor, the structure of special groups, such as the development of high-rise building pile foundation construction and railway construction in technology, so the construction units are facing the increasingly high demand, more and more strict, the pile foundation detection technology can play a role on the quality of pile foundation should be.1 桩基的检测技术分析Analysis and testing technology 1 pile foundation1.1 成孔的质量检测Quality inspection of 1.1 into the hole在对成孔的质量进行检测时,主要的检测部位有桩孔的位置检测、孔径以及孔深的监测。
底沉渣的厚度监测和垂直度的监测等等。
成孔的质量直接归决定桩基的柱体的成桩质量,过时桩孔在孔径上的直径偏小,那么整个桩的承载力就会有所下降;而若是孔径扩大,那么整个桩在上部的侧阻力优惠随之增大,下部就不能发挥侧阻力应有的作用;另外,桩孔的垂直程度也会对承载力造成影响,偏斜的基桩会阻碍桩基的作用发挥;最后若是底部的沉渣太多就会令桩体的有效长度减少,那么也会对桩体的质量造成影响。
因此,这些问题的检测工作就尤为重要了。
/ /On the test of the quality of pore, position detection, detection part mainly have the pile hole diameter and hole depth monitoring. Thickness monitoring and verticality of bottom sediment monitoring etc.. The quality of the pile hole quality directly to the cylinder pile decision, outdated pile hole in aperture of the diameter is small, so the bearing capacity of the pile will decrease; and if the size, then the whole pile side resistance concessions in the upper part of the increase, the lower part can not play the role of side resistance due; in addition, the vertical extent of pile hole can also impact on the bearing capacity of the pile deflection, play will hinder the pile foundation; finally, if the effective length of the bottom sediment too much will make the pile decreases, it will affect the quality of pile body. Therefore, detection of these problems is particularly important.1.2 承载力检测分析1.2 bearing capacity analysis1.2.1 静荷载试验法。
这种方式在对于桩基的检测上主要是检测承载力,桩基在水平上的承载力以及在竖直方向上的承载力是桩基质量的衡量标准,同时也是对建筑的影响最大的因素,这里就需要用到静荷载实验的方式。
一般的工程检测中大多都是对竖直方向上的承载力较为重视。
这种检测方式的有点就是利用了和桩基实际会承受的力度去模拟实验对其受理的条件进行试验。
这种方式一般都应用在对于工程试桩的检测上,在不破坏桩基的基础上对其进行检测。
并且精度很高,误差低于10%。
1.2.1 static load test method. In this way for pile foundation detection is detection of bearing capacity, bearing capacity of pile foundation in the level and capacity in the vertical direction is a standard measure of quality of pile foundation, but also the impact on building the biggest factor, here we need to use the static load experiment method. The general engineering detection mostly has attached more importance to the bearing capacity of the vertical direction. This detection method is a little use and actual pile foundation will bear the efforts to simulate the experimental test of the admissibility condition. This is generally used in the detection for engineering test pile, the pile foundation detection without destroying the. And the precision is very high, the error is less than 10%.1.2.2 高应变动法。
这种方式是通过对桩体在接近极限承载力的时候的状态分析,这就需要利用到重锤这一机械方式的瞬间冲击力,令桩体周围的土产生变形。
在结合其实际测量力度以及速度时,通过数据的曲线分析,结合应力波的理论以及桩体的有关参数,对桩体的极限工作能力进行分析。
/ /1.2.2 high strain method. This way is through the analysis of the status of pile body when approaching the limit bearing capacity, it will need to use the weight that a mechanical means of instantaneous impact force, the pile surrounding soil deformation. In combination with the actual measurement of strength and speed, through the analysis of data curve, combined with the relevant parameters of the stress wave theory and the analysis of pile, ultimate working capacity of piles.1.3 完整性的检测分析Detection and analysis of 1.3 integrity1.3.1 低应变动的测法。
这种测法就是通过波动理论以及机械阻抗理论进行试验分析,在桩顶是假一个较低振幅的激振能量。
通过这种能量对土体的周围进行环境改变,引起桩身以及土体在桩身周围的微幅振动。
同时使用仪表对加速度以及振动的速度进行记录以及分析,并通过分析达到控制和检验桩基的目的,对桩基的质量进行保障,对桩身的完整性进行保证以及达到对桩基承载力的预测目的。
1.3.1 low strain dynamic testing. This method is tested through the analysis of the wave theory and the mechanical impedance theory, on top of the pile is a low amplitude vibration energy. Environmental change through the energy of soil around the pile and the soil, causing the micro-amplitude vibration around the pile shaft. At the same time, the use of instrument for recording and analysis of vibration acceleration and velocity, and achieve the control and inspection of pile foundation through the analysis of the objective, for the guarantee of the quality of the pile foundation, guarantee and the purpose of prediction of bearing capacity of pile integrity of pile body.1.3.2 声波透射检测法。