7、挡土墙设直径10cm泄水孔，孔间纵横中距2.5m，坡度5%，最下排

7, the retaining wall provided scuppers 10cm diameter, distance between the holes in the aspect 2.5m, gradient of 5%, the lowest water drain hole from the ground 0.2M, scuppers material can be steel or PVC pipes. Weep hole is provided at the inlet to facilitate drainage bag filtration, filter width of the package 800.

7, retaining wall set a diameter of 10cm drainhole, the hole between the mid-section distance of 2.5m, slope 5%, the lowest excretion of water hole from the ground 0.2m, the drainhole material can be used steel pipe or PVC pipe. The anti-filter package is set at the inlet of the drain hole to facilitate drainage, and the width of the anti-filter bag is 800.

7. The retaining wall is provided with a drain hole with a diameter of 10cm. The vertical and horizontal middle distance between the holes is 2.5m, and the slope is 5%. The lowest drain hole is 0.2m from the ground. The drain hole can be made of steel pipe or PVC pipe. The inlet of the drain hole is provided with a filter bag to facilitate drainage. The width of the filter bag is 800.