Beech laminated veneer lumber (LVL) circular hollow sections for use as nails in temporary geotechnical soil nailing systems were developed within this research. For the soil wall stability, beside a sufficient load carrying capacity of the nail cross section, a load carrying connection between the cement annulus and the nail is necessary. As cement grout ensures the bond between the nails and soil for the mobilisation of a soil reinforcement effect, a reliable connection between cement and wood surface is required. Occurring shear forces must be transferred from the nail into the soil through the wood-cement interface similar to reinforced concrete. Pull-off tests on clear LVL specimens with different cement and wood surface modifications as well as the results of large-scale push-out tests are presented. The results reveal a sufficient short-term bonding strength between the cement annulus and the wooden member to transfer the geotechnical loads, but also highlight the necessity of further research on long-term behaviour.

在此研究中，开发了用于临时岩土土钉系统中用作钉子的榉木层压单板木材（LVL）圆形空心型材。为了保证土墙的稳定性，除了要保证指甲横截面具有足够的承载能力外，还需要在水泥环和指甲之间建立一个承载连接。由于水泥灌浆确保了钉子和土壤之间的结合力，从而发挥了土壤加固作用，因此，水泥和木材表面之间需要可靠的连接。发生的剪切力必须通过钉牢通过类似于增强混凝土的木水泥界面从钉子传递到土壤中。给出了对具有不同水泥和木材表面改性的透明LVL标本的拉拔试验，以及大规模推顶试验的结果。