定量测定C1-C2最大活动范围和最大螺钉抗拔力。
Full range of motion over C1-C2 and peak screw pull-out force was quantified.
为了估计混凝土抗压强度，抗拔力锚固系统出现故障时，测量。
To estimate the concrete compressive strength, the Pullout force when the anchorage system fails is measured.
结果与结论：增加椎弓根螺钉稳定性的重点是提高螺钉抗拔力。
RESULTS AND CONCLUSION: The focus on increasing stability of pedicle screw is to increase screw withdrawal resistance.
锚杆随着锚固长度的增加，极限抗拔力并不是线性增加的，而是增加得越来越不明显。
With the increase of the anchorage length of the anchor rod, the ultimate pull - out resistance of the anchor rod does not increase linearly, but is less and less obvious by gradual increase.
最后通过试验土钉抗拔力反算土体与锚固体的极限粘结强度，并与规范推荐值进行了比较。
Finally, the limit cohesion strength between the soil and the nail was obtained by in-situ test, and the results were also compared with those regulated by the technical specification.
在软岩隧道支护中，自旋注浆锚管的抗拔力是至关重要的技术参数，关系到锚固体系的安全。
In the support project of soft-rock tunnel, the pullout resistance of the Self-screwed Slip Casting Tube Bolt is the critical technical parameter that related to the security of anchorage system.
经聚苯板与混凝土粘合力、塑料胀管抗拔力、压缩率及抗冻试验表明该体系性能可靠、安全度高；
The tests of bonding power between polystyrene board and concrete, plastic expanded tube pull- out, compressibility, freeze resistance show the system property is reliable and high safe.
在混凝土屋面，钉子抗拔力的大小尤其重要，因为钉子必须保证玻纤瓦固定在屋面上而不被风刮走。
It is important especially for installation on concrete roofs, because the nail must hold onto the concrete and guarantee that the shingles will not blow away.
研究表明，随拉压循环次数的增加，应力向钢筋集中，钢筋承受的拉力随之增大，抗拔力大部分由底部的锚固头提供。
The study shows that the stresses are concentrated in the reinforcing steel bar and increase with the number of cycle. The bolted body of bottom mainly provides anti-pull bearing capacity.
直接拧入式螺杆的极限抗拔力随着拆装次数的增多而下降，但是，当拆装次数为8-9时，极限抗拔力仍然可达到尼龙预埋螺母的水平。
It declines with the increase of times of direct assembling bolt knocked-down. But it can still reach that of nylon inbuilt nut after knocked-down 8 to 9 times.
结果表明抗拔桩的曲线形状与持力层岩石风化程度和桩的嵌岩深度有关。
It is shown that the shape of curves is related to the rock weathering of bearing strata and rock-socketed depth.
提出了在地下车库内增设抗拔桩和剪力墙的加固方案，计算结果显示，增设剪力墙后桩基所受上拔力大幅度降低。
The reinforcement scheme which add tension piles and shear walls in the garage was put forward. The calculation results show that the uplift load of the pile greatly reduced after adding shear walls.
提出了在地下车库内增设抗拔桩和剪力墙的加固方案，计算结果显示，增设剪力墙后桩基所受上拔力大幅度降低。
The reinforcement scheme which add tension piles and shear walls in the garage was put forward. The calculation results show that the uplift load of the pile greatly reduced after adding shear walls.
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