在水平向对称铺设双向土工格栅后，明显限制坝坡水平向位移的发展；加双向土工格栅前后坝体竖向位移的变化规律一致，加筋 后竖向位移明显降低；各层双向土工格栅的内力分布规律不同，下层的双向土工格栅只有部分发挥了加固 土体的作用，可以适当缩短下层格栅的长度，而中间层格栅的作用发挥较好，内力几乎沿格栅通长分布；
After the two-way geogrid is laid horizontally and symmetrically, the development of the horizontal displacement of the dam slope is obviously limited; the change rule of the vertical displacement of the dam body before and after the two-way geogrid is added is the same, and the vertical displacement after the reinforcement is obviously reduced; the internal force distribution rule of the two-way geogrid in each layer is different, and only part of the two-way geogrid in the lower layer plays a role of reinforcement The effect of soil can shorten the length of the lower grid, while the effect of the middle grid is better, and the internal force is almost distributed along the whole length of the grid;
       铺设双向土工格栅后，坝体顶部的塑性剪应变的大小明显减小，并使高塑性剪应变区从靠近坝 顶的坝体内部转移到沿坝坡表面的浅层；防止侧向位移:软土路基在垂直应力的作用下容易发生侧向位移，利用土工格栅发挥上述两个作用后，有效防止软基的侧向位移,使路基基础的整体性更强,格栅的抗拉伸强力平均的分配在每一 平方米单位上。
After laying the two-way geogrid, the size of the plastic shear strain on the top of the dam body is significantly reduced, and the high plastic shear strain area is transferred from the inside of the dam body near the dam top to the shallow layer along the dam slope surface; to prevent lateral displacement: the soft soil subgrade is prone to lateral displacement under the action of vertical stress, and the lateral displacement of the soft foundation is effectively prevented by using the geogrid to play the above two roles, So that the integrity of the subgrade foundation is stronger, and the tensile strength of the grid is evenly distributed in every square meter unit.
       双向土工格栅的加筋效果与格栅的接连方式、长度、间距以 及弹模等结构参数有关。格栅筋端采用铰结时，由于混凝土块限制其位移，位移较小；而采用自由 时，由于没有混凝土块限制，位移较大，因此铰结的效果较好；
The reinforcement effect of two-way geogrid is related to the connection mode, length, spacing, elastic modulus and other structural parameters. When the end of grid bar is hinged, the displacement is small due to the limitation of concrete block, while when the free end is adopted, the effect of hinged joint is better because there is no limitation of concrete block and the displacement is large;
       随着格栅长度的增加位移均 减小，当格栅长度超过潜在滑裂面一定长度以后，再增加格栅长度对位移的影响已不是很明显;选择模量高，延伸率适宜的双向土工格栅对减少坝顶的位移和提高坝体的稳定性具有明显效果。
With the increase of the length of the geogrid, the displacement decreases. When the length of the geogrid exceeds a certain length of the potential sliding surface, the effect of increasing the length of the geogrid on the displacement is not very obvious. The selection of two-way geogrid with high modulus and appropriate elongation has obvious effect on reducing the displacement of the dam crest and improving the stability of the dam body.
       (1)沿铁路纵向，车载作用前,桩顶双向土工格栅的竖向位移较桩间的大,双向土工格栅变形形状呈倒“U”形,变形量约为2.27 mm;车载作用后,桩顶双向土工格栅竖向位移增量为1. 62 mm,桩间双向土工格栅竖向位移增量为1. 72 mm,变形增量为0.10 mm,桩顶土，工格栅拉力分布呈“M"形,四桩间双向土工格栅拉力增量较两桩间的大;车载前后,双向土工格栅拉力和拉力增量由大到小依次为桩顶边缘、桩顶中心和桩间,桩间双向土工格栅拉力分布呈现倒“V"形,两桩间双向土工格栅拉力大于四桩间。
(1) Along the longitudinal direction of the railway, the vertical displacement of the two-way Geogrid on the top of the pile is larger than that between the piles, and the deformation shape of the two-way geogrid is inverted "U", with the deformation amount of about 2.27 mm; after the vehicle action, the vertical displacement increment of the two-way Geogrid on the top of the pile is 1.62 mm, the vertical displacement increment of the two-way geogrid between the piles is 1.72 mm, and the deformation increment is 0.10 mm, For the soil on pile top, the tension distribution of the geogrid is in the shape of "m", and the tension increment of the two-way geogrid between the four piles is larger than that between the two piles; before and after the vehicle, the tension increment of the two-way geogrid is in the order of the top edge of the pile, the center of the pile top and the pile, and the tension distribution of the two-way geogrid between the piles is in the shape of inverted "V", and the tension of the two-way geogrid between the two piles is larger than that between the four piles.
       (2)在路基横断面,从路基中心到坡脚,桩顶与.桩间双向土工格栅竖向位移逐渐减小，分布规律大致相同;车载作用后,路基中心与坡脚双向土工格栅竖向位移增量分别为1. 73、1.25 mm,双向土工格栅竖向变形增量为0.48 mm;车载作用前后,桩顶和桩间土工格栅动拉力及拉力增量均呈递减趋势,至坡脚处双向土工格栅动拉力出现负值。
(2) In the cross section of subgrade, from the center of subgrade to the toe of slope, the vertical displacement of the two-way geogrid between the pile top and the pile decreases gradually, and the distribution rule is basically the same; after the vehicle loading, the vertical displacement increment of the two-way geogrid between the center of subgrade and the toe of slope is 1.73 and 1.25 mm respectively, and the vertical deformation increment of the two-way geogrid is 0.48 mm; before and after the vehicle loading, The dynamic tensile force and increment of tensile force of geogrid between pile top and pile are decreasing gradually, and the dynamic tensile force of two-way geogrid at the foot of slope appears negative value.
       (3)在路基横断面,在车载作用后,双向土工格栅的竖向变形增量较线路纵向的大,原因在于横向双向土工格栅受到列车荷载和路基边坡产生横向滑移.的双重影响，因此,实际中选择高强度的双向土工格栅能更加有效减小桩土的差异沉降,保障路基和边坡持续稳定。
(3) In the cross section of subgrade, the vertical deformation increment of the two-way geogrid is larger than that of the line after the vehicle loading, because the two-way geogrid is affected by the train load and the lateral sliding of the subgrade slope. Therefore, the selection of high-strength two-way geogrid can effectively reduce the differential settlement of pile-soil and ensure the continuous stability of subgrade and slope.
       相信大家看完以上内容以后，应该也对双向土工格栅如何防止侧向位移有所了解了，希望会对大家有所帮助吧。
I believe that after reading the above content, you should also know how to prevent the lateral displacement of the two-way geogrid. I hope it will help you.
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