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在地下工程和边坡工程中,广泛采用有预张力的粘结式锚杆加固岩体。粘结剂固化后,除去加力装置,锚杆回缩。锚杆靠粘结剂向岩体传递剪力,在围岩中形成附加应力场,并引起锚杆自身不均匀变形。 本文根据锚杆和岩休的力学边界条件、几何条件,视锚杆和岩体为弹性体,利用明德林(Mindlin)解,得到了去掉预张力后,锚杆回缩在岩体中产生的应力场和锚杆自身应力分布的规律。 在解题过程中引用了由R.米开(R.Muki)和E.斯特恩白格(E.Sternberg)导出的柱状空间内的明德林积分解。
In underground engineering and slope engineering, pre-tensioned bonded anchor rods are widely used to reinforce the rock mass. After the adhesive is cured, the force device is removed and the anchor is retracted. The anchor rod transmits shear force to the rock mass by the binder, forming an additional stress field in the surrounding rock, and causing the anchor rod itself to be unevenly deformed. In this paper, according to the mechanical boundary conditions and geometric conditions of rock bolts and rock breaks, the anchor rods and rock masses are considered as elastic bodies. The solutions are solved using Mindlin. After the pretension is removed, the anchor rods retract in the rock mass. The stress field and the stress distribution of the bolt itself. The Mindlin integral solution in the columnar space derived by R. Muki and E. Sternberg is referenced in the problem solving process.