简述液压履带打桩机的打桩过程

简述液压履带打桩机的打桩过程

A brief description of the pile driving process of the hydraulic crawler piling machine

市场上常见的液压履带打桩机，均以机械动力为主，一般分为锤击法、振荡法和静力压桩法；履带打桩机进入施工现场后，依据现场地势条件、地基土状况和桩的安置，以及桩的长度和桩架移动便当等要素决定桩的先后打桩次序，最终使桩的入土深度基本相同，并使地基土均匀挤密。

The common hydraulic crawler piling machines in the market are mainly mechanical power, which are generally divided into hammering, oscillation and static pile pressing. After the crawler piling machine enters the construction site, the pile driving time is determined according to the conditions of the site, the condition of the foundation and the placement of the pile, the length of the pile and the movement of the pile frame. In order, the depth of the pile is basically the same and the foundation soil is uniformly extruded.

假如桩数不多时，液压履带打桩机应从中心初步分头向两端相反的方向进行，但当桩基面积较大时，应将桩基分为数段，然后再各段范围内别离进行；液压打桩机应避免自外向内，或从周边向中心进行，避免桩基中部的地基土被挤密，加大打入的难度，即便勉强打入也会使已打入的邻桩向上冒起；在亚粘土及粘土区域，更应避免按着一个方向进行，致使土向一边揉捏，构成桩入土深度不一，地基土密度不均，使整个桩基日后发作不均匀下沉；假如遇到桩距大于或等于4倍桩直径或边长的状况，打桩次序的影响要小一些，但假如是面积群桩，就要事前规划打桩次序，避免呈现不良后果或安全事故。

If the pile number is not much, the hydraulic crawler piling machine should proceed from the center to the opposite direction in the opposite direction, but when the pile foundation area is large, the pile foundation should be divided into several sections and then separated from each section. The hydraulic piling machine should avoid self extrovert or from the periphery to middle heart to avoid the foundation soil in the middle of the pile foundation. In the clay and clay areas, the soil should be avoided in one direction, causing the soil to be kneaded on one side, and the depth of the pile is different and the soil density is uneven, so that the whole pile foundation is unevenly sunk in the future. When the pile distance is greater than or equal to 4 times the diameter or length of the pile, the influence of the pile driving order is smaller, but if it is an area group pile, it is necessary to plan the sequence of pile driving in advance so as to avoid adverse conse or safety accidents.