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强夯施工对周围建筑物的影响和处理方法

网址:http://www.sddhfjx.cn/   发布日期:2021-04-21 关注次数:
强夯设备进行施工时发生的震动对修建物影响成果和强夯工艺参数、以及周围修建自身的结构或许跟土体结构有关。
The impact of the vibration of the dynamic compaction equipment on the construction results and dynamic compaction process parameters, as well as the surrounding structures may be related to the soil structure.
在强大的夯击能的作用下,以夯锤为中心的夯点中心敏捷下沉,累积沉降量几乎能够达到1m以上,而夯坑周围的土结构也会由于外力的作用而拱起,地基土体的变形所带来的成果当然是会对周围的修建物发生晦气影响。
Under the action of strong tamping energy, the center of tamping point with the tamping hammer as the center sinks rapidly, and the accumulated settlement can reach more than 1m, and the soil structure around the tamping pit will arch up due to the effect of external force. Of course, the deformation of foundation soil will have a bad influence on the surrounding buildings.
夯锤对地上施加的冲击能量,以振荡波的方式在地基弹性体半空间中传达,改变着土体的物理力学性质。体波沿着一个半球波阵面径向地向外传达。纵波使土体受拉、压作用,能使孔隙水压力添加,导致土骨架溃散。这种动摇对地基压密没有作用,但对修建物发作的振荡较大,为有害波。
The impact energy exerted by the rammer on the ground is transmitted in the half space of the elastic body of the foundation in the form of oscillation wave, which changes the physical and mechanical properties of the soil. The body wave propagates radially along a hemispherical wave front. The longitudinal wave makes the soil under tension and pressure, which can increase the pore water pressure and lead to the collapse of soil skeleton. This kind of shaking has no effect on the compaction of the foundation, but it has a large oscillation on the building, which is harmful wave.
从上述的剖析原理不难看出,由于冲击波的作用引起地基土的挤密和表层的懈怠变形,然后造成了地基土变形,地基土的变形必定影响了周围已建修建物根底的安全。
From the above analysis principle, it is not difficult to see that the compaction of the foundation soil and the slack deformation of the surface layer are caused by the effect of the shock wave, and then the deformation of the foundation soil is caused. The deformation of the foundation soil must affect the safety of the surrounding buildings.
施工前应查看夯锤分量、尺度,落距操控手段,排水设备及被夯地基的土质。为避免强夯振荡对周边设备的影响,施工前一定对附近修建物进行调查,必要时采取相应的防振或隔振措施,影响范围约10~15m。施工时应由邻近修建物开始夯击逐步向远处移动。施工中应查看落距、夯击遍数、夯点方位、夯击范围。
Before construction, check the weight and scale of rammer, drop distance control means, drainage equipment and soil quality of rammed foundation. In order to avoid the impact of dynamic compaction vibration on the surrounding equipment, the nearby buildings must be investigated before construction, and corresponding anti vibration or vibration isolation measures shall be taken when necessary, with the impact range of about 10-15m. During the construction, the adjacent buildings should be rammed and moved to the distance gradually. During the construction, the drop distance, tamping times, tamping point position and tamping range should be checked.
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