First, the influence of the operation during the construction process on the strength of the chemical anchor.
1. Excessive stirring has a great impact on the fixing strength of the chemical anchor, and the buried depth mark must be made on the bolt, and it should be stopped in time when the bolt mark reaches the hole surface;
2. The cleaning of dust in the hole has a great impact on the chemical anchor bolt;
3. The larger the borehole diameter, the pull-out load will be significantly reduced;
4. In the drilling operation, when there is a phenomenon of honeycomb holes, it is necessary to move to another position and continue to drill again without affecting the original hole. Insert the specified chemical anchor, bury and stir with a screw of the specified diameter, pull out the screw immediately, insert one chemical anchor bolt again, bury the screw again, stir until the resin mixture overflows near the orifice, and immediately stop the construction stirring action.
Second, the potential safety hazards caused by the insufficiency of the chemical anchor bolt itself.
The fire resistance of chemical anchors has always been a matter of concern, some products contain a large amount of styrene in chemical agents, the substance is unstable after heat, which directly affects the fire resistance of chemical anchors, low price, unstable quality, short storage time, and is not resistant to aging. In addition, there are two kinds of packaging for chemical agents on the market, one is plastic hose, one is glass tube, glass can be used as fine aggregate, can be utilized, and glass packaging is easy to see the ingredients inside, whether it is expired, it is easy to see, but the cost of glass packaging is more expensive than plastic.