(1) Borehole diameter, depth and inclination shall meet the design and specification requirements.
(2) The drilling position should be accurately positioned according to the design, and the spacing should be no more than 2cm.
2, prestressed anchor
(1) The diameter, length and straightness of anchor bars shall meet the design requirements.
(2) The anchor rod shall be installed with centering device according to the design, so as to ensure that the anchor rod is located in the drilling center.
(3) The length of the anchor head buried in the rib column or the connection length between the anchor head and the panel shall meet the design requirements.
3. Grouting
(1) Grouting shall be carried out in strict accordance with the mixture ratio, and trial spraying shall be carried out before large-area grouting.
(2) The grouting pressure meets the design requirements, and the grouting should be full. When conditions permit, the grouting density should be detected by the anchor grouting density detector.
4, anchor plate and wall
(1) When cast-in-place ribbed column, the length of anchor head embedded in ribbed column should meet the requirements, and it should be connected with skeleton reinforcement as designed; When using assembled panel or ribbed column, the connection mode and length of anchor head with ribbed column and panel should meet the design requirements.
(2) The plane position of the rib column should meet the design and specification requirements to ensure the installation accuracy of the prefabricated baffle.
(3) The plane position, inclination and concrete strength of the wall should meet the design and specification requirements.
5, quality control points
(1) drilling. The diameter, depth and inclination of drilling holes must meet the design and specification requirements, especially when the slope is broken, hole collapse should be prevented.
(2) Grouting. In strict accordance with the mix proportion of construction, grouting from the bottom of the hole to the orifice should ensure the compactness of grouting.
(3) The connection length and connection mode of prestressed anchor and ribbed column (or assembled wallboard) must meet the design requirements.