The manufacturer directly sells the special self-propelled hollow anchor rod for tunnel slope protection project

  It is introduced that the hollow bolt body of the hollow bolt adopts the hollow design, and the middle hole of the rod body is used as the high-pressure air and water channel for drilling and grouting
Compared with the solid rod body, the hollow rod body design can obtain better stiffness and shear strength
The full-length standard large pitch screw thread structure on the external surface of the anchor rod facilitates the cutting and lengthening of the anchor rod
Compared with the smooth rod body, it increases the bonding area between the anchor rod body and the grouting material, thus improving the anchoring force

characteristic
1
The installation is convenient to ensure that the prestress can be applied in time

2
With active tensioning, the prestress can reach 50kN, and proper over tensioning can be realized

3
With conventional tools, the tensioning operation can be realized by one person

4
High pressure grouting can be realized through hollow rod body to improve surrounding rock

5
The whole process control from production to installation ensures the quality [1] 
structure
It is composed of steel expansion shell anchor head, hollow grouting anchor body, grout stop plug, base plate and nut
Safety requirements and measures 1
During construction, the working state of support shall be inspected regularly and irregularly
In unfavorable geological section? Special personnel shall be assigned to inspect each shift

2
When the construction is suspended, the support shall be directly against the excavation surface

3
The simple bench of anchor rod shall be installed stably

4
In case of blockage or burst of air, water and material conveying pipelines during operation, the conveying of air, water and materials must be stopped in turn

5
Remedial measures shall be taken when deformation, cracking and other dangerous situations of the support system are found in the monitoring and measurement of the bolt support system
In case of critical situation, personnel shall be evacuated from the dangerous area

6
In case of large deformation or bolt failure in the anchored section, the reinforced bolt shall be added in the section immediately, and the length shall not be less than 1
5 times of the original bolt length

Precautions 1
Grouting workers must wear protective tools

2
Carefully check the machines, equipment and lines? Avoid electric leakage injury

3
The mechanical driver shall operate in strict accordance with the operating procedures

4
Grouting workers and grouting pump drivers must coordinate well

5
After grouting, the valve must be closed first, and then the grouting device must be closed

6
It is not allowed to damage people at the grouting mouth