铺设土工格栅时容易犯哪些错误

       玻纤土工格栅稳固砂土层已经是公开的秘密,越来越多的公路工程使用玻纤土工格栅来提高整体质量,及完工后顺畅通车的使用年限,打造**工程典范。不仅如此,在道路斜坡、堤坝等现场也使用玻纤土工格栅来提高砂土层的强度系数,减少陡坡带来的沙土流失和植被损伤,还能够提高表层承载力,改善快速施工带来的土地沉降问题,在软土路基和厚软土层都能够铺设并发挥良好的加固效果。

It is an open secret that glass fiber geogrid is used to stabilize sand soil layer. More and more highway projects use glass fiber geogrid to improve the overall quality, and the service life of smooth traffic after completion, so as to build a model of high-quality projects. In addition, fiberglass geogrid is also used in the road slope, dike and other sites to improve the strength coefficient of sand soil layer, reduce the sand soil loss and vegetation damage caused by steep slope, improve the surface bearing capacity, improve the land settlement caused by rapid construction, and lay and play a good reinforcement effect in soft soil subgrade and thick soft soil layer.

       铺设前在检验合格的下承层上洒水,并用钢尺放出新旧路基结合处的中心位置及玻纤土工格栅铺设的边缘线,并用白灰画出白线以做标记。

Before laying, spray water on the lower bearing layer passing the inspection, set out the center position of the joint of the new and old subgrade and the edge line of the glass fiber geogrid laying with a steel ruler, and draw a white line with white ash for marking.

       将成捆玻纤土工格栅运至施工现场后,按一定的距离放至施工作业面外,将玻纤土工格栅的一端固定,再将玻纤土工格栅铺开后另一端固定,再用事先做好的U形钢丝(8 号钢丝,长约10cm 左右) 将玻纤土工格栅两端钉入土中固定。在铺设另一块玻纤土工格栅时,与靠前块玻纤土工格栅作20cm 的搭接。在两格栅搭接的地方布设1～3 道U 型钢丝,以防止其在中间卷起。玻纤土工格栅栅肋的铺设方向与路基纵缝受力方向要一致。

After the bundle of glass fiber geogrid is transported to the construction site, it shall be placed outside the construction surface according to a certain distance, one end of the glass fiber geogrid shall be fixed, the other end shall be fixed after the glass fiber geogrid is spread out, and then the two ends of the glass fiber geogrid shall be nailed into the soil with the U-shaped steel wire (No. 8 steel wire, about 10cm long) prepared in advance. When laying another glass fiber geogrid, make a 20cm overlap with the front glass fiber geogrid. Lay 1-3 U-shaped steel wires at the place where two gratings overlap to prevent them from rolling up in the middle. The laying direction of the grid rib of the glass fiber geogrid shall be consistent with the stress direction of the longitudinal joint of the subgrade.

       玻纤土工格栅的回填采用铲车或挖掘机来完成。将备用土均匀撒布在玻纤土工格栅上,并用推土机和平地机找平。路基压实厚度不得超过30cm ,并保证玻纤土工格栅不外露。机械的施工方向与玻纤土工格栅搭接顺茬方向一致,以保证玻纤土工格栅不被机械迎茬卷起。

The glass fiber geogrid is backfilled by forklift or excavator. The spare soil shall be evenly distributed on the glass fiber geogrid and leveled with bulldozer and grader. The compacted thickness of subgrade shall not exceed 30cm, and the glass fiber geogrid shall not be exposed. The construction direction of the machine shall be consistent with the splicing direction of the fiberglass geogrid to ensure that the fiberglass geogrid is not rolled up by the machine.

       玻纤土工格栅的填土应尽量使其一次性成型,在回填前对填土的含水量进行检测,避免含水量过大而返工处理时造成玻纤土工格栅的破坏。玻纤土工格栅铺设完成后,马上进行回填土,防止各种因素破坏。施工前对施工人员进行技术交底,增强施工人员的质量意识和责任意识。

The filling of the glass fiber geogrid shall be formed in one time as much as possible, and the water content of the filling shall be tested before backfilling to avoid the damage of the glass fiber geogrid caused by rework due to the excessive water content. After the glass fiber geogrid is laid, it shall be backfilled immediately to prevent the damage of various factors. Before construction, technical disclosure shall be made to construction personnel to enhance their quality awareness and responsibility awareness.

       施工人员认识不足和质量意识不强。玻纤土工格栅的铺设在设计中要求比较严格。少数的施工人员为了省时、省工、省料，而不按设计施工，随意取改或取消玻纤土工格栅而造成公路施工质量降低。

Construction personnel lack of awareness and quality awareness. The laying of glass fiber geogrid is strictly required in the design. In order to save time, labor and materials, a small number of construction personnel do not carry out construction according to the design, and arbitrarily take, change or cancel the fiberglass geogrid, resulting in the reduction of the quality of highway construction.

       玻纤土工格栅的搭接不到位。由于厂家生产的玻纤土工格栅受尺寸的限制，玻纤土工格栅的宽度一般为1m-2m不等。在铺设较宽的路基时要有一定的搭接宽度。而施工人员在操作中往往忽视这一点，过长搭接造成了浪费，搭接不足或没有搭接又容易出现薄弱点而造成二者分离，降低了玻纤土工格栅的性能。

The splicing of fiberglass geogrid is not in place. Because the glass fiber geogrid produced by the manufacturer is limited by the size, the width of the glass fiber geogrid is generally 1-2 M. There should be a certain overlap width when laying a wider subgrade. But the construction personnel often neglect this point in the operation, too long lapping causes waste, insufficient lapping or no lapping easily leads to weak points, resulting in the separation of the two, reducing the performance of the glass fiber geogrid.

       玻纤土工格栅铺设方法不正确。单向玻纤土工格栅主要为单向受力，铺设时，玻纤土工格栅的栅肋方向与路线纵缝受力方向一致，才能够发挥玻纤土工格栅应有的作用，而有的施工人员在施工中往往把玻纤土工格栅铺设的方向与纵缝受力方向相反，结果没有起到应有的作用，还造成人工、材料、机械的浪费。

The laying method of fiberglass geogrid is incorrect. The unidirectional GFRP geogrid is mainly under unidirectional stress. When laying, the direction of the grid rib of the GFRP geogrid is the same as the stress direction of the longitudinal joint of the route, so that the GFRP geogrid can play its due role. However, some construction personnel often put the direction of the GFRP geogrid laying opposite to the stress direction of the longitudinal joint in the construction, resulting in the failure to play its due role, resulting in labor, materials Mechanical waste.

       在铺设玻纤土工格栅时，玻纤土工格栅中心与路基纵缝的中心偏离，玻纤土工格栅的两侧受力不均匀。玻纤土工格栅铺设的不牢固，或在上填筑料之前铺设的时间较长，就会影响其工艺质量。因为受外界影响因素有很多，如：刮风、行人及车辆等，如不慎将玻纤土工格栅掀开，则在进行重新铺设时不仅浪费时间，也无法保证施工工艺。

When laying the glass fiber geogrid, the center of the glass fiber geogrid deviates from the center of the longitudinal joint of the subgrade, and the forces on both sides of the glass fiber geogrid are uneven. If the glass fiber geogrid is not laid firmly or laid for a long time before the filling materials are added, the process quality will be affected. Because there are many factors affected by the outside world, such as wind, pedestrians and vehicles. If the fiberglass geogrid is inadvertently opened, it will not only waste time, but also can not guarantee the construction process.

       玻纤土工格栅在填土和推平时，不讲究科学的施工工序将玻纤土工格栅损害，或路基填土处理不到位以及重新返工处理时将玻纤土工格栅损坏。

When the glass fiber geogrid is filled and pushed, the glass fiber geogrid will be damaged if the scientific construction process is not paid attention to, or if the subgrade fill is not treated in place and reworked.

       相信大家看完以上内容以后，应该也对铺设土工格栅时容易犯哪些错误有所了解了吧，希望会对大家有所帮助吧。

I believe that after reading the above content, you should also understand what mistakes are easy to make when laying geogrid. I hope it will help you.

      本文词标签：玻纤土工格栅

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