一种新型多横栓土锚栓间距对承载力影响研究

Influence of new type of multi-transverse bolt soil anchor and bolt spacing on bearing capacity

为研究多横栓土锚横栓间距与横栓数量对多横栓土锚抗拔力的影响,应用FLAC3D软件模拟多横栓土锚在素填土中的受力状况。模拟结果表明:横栓间距小于1.9 d时(d为土锚直径),容易出现冲切破坏;当横栓间距大于2.5 d时,横栓周围土体受力不均,易出现局部隆起破坏,同时另一部分土体未能充分发挥承载能力;其最优间距为2.2 d。

To study the influence of the spacing and number of horizontal bolts of multi-horizontal bolt soil anchors on the pullout resistance of multi-horizontal bolt soil anchors,FLAC3D software was applied to simulate the stress state of multi-horizontal bolt soil anchors in plain fill.The simulation results show that when the distance between cross bolts is less than 1.9d(d is the diameter of soil anchor),punching failure is easy to occur.When the distance between the horizontal bolts is more than 2.5d days,the soil around the horizontal bolts will be subjected to uneven stress,which will easily lead to local uplift damage,while the other part of the soil will not give full play to its bearing capacity.The optimal spacing is 2.2d.