CAD for grass planting protection of bolt frame in tunnel a design chart
Design drawing of grass planting protection for tunnel anchor bolt frame, 1 The diameter of rebar in the drawing is in mm, and other dimensions are in cm. 2. This drawing is the grass planting protection design of anchor bolt frame, which is composed of C20 concrete and reinforcement framework. The frame is protected by grass planting with stretched net; 3. In order to prevent the skeleton from shifting and sagging during construction φ 6 The anchor nail is anchored on the slope and used to fix the tensile net. The anchor nail anchoring depth is not less than 0.5m, subject to the fixation. The thickness of planting soil shall be ≥ 20cm. 4. In order to ensure the flatness and straightness of the spray frame, galvanized welded mesh shall be installed on both sides of the reinforcement framework and bound and fixed on the reinforcement framework. 5. The reinforcement skeleton node is composed of Φ 25 The threaded rebar anchor bolt is bonded and fixed, the anchor bolt fixing depth is 8m, the anchoring angle is perpendicular to the slope, and the exposed end of the anchor bolt is tied or welded with the reinforcement skeleton stirrup. 6. An expansion joint with a width of 2cm shall be set every 20-25m of the frame and filled with asphalt waterproof material.
