Landscape greening design in Harbin Technical specifications for pavement engineering:

1、 The variety, quality and specification of materials used for the base course and surface course of the ground works, and the longitudinal and transverse gradient, thickness, elevation and flatness of each structural layer shall meet the design requirements; The combination (bonding) between the surface course and the base course must be firm, without hollowing or loosening, and the surface course must not have water accumulation. The arc of the garden road should be smooth and natural.

2、 The crushed granite surface course (including other irregular pavement surface courses) shall meet the following requirements:

1. The edge of the material is in the shape of natural fragmentation, and the shape is basically similar. Sharp corners and regular shapes are not suitable.

2. The color and size match well, and the size and depth of joints are consistent.

3. The surface is clean, and the ground is free from ponding.

3、 The pebble surface course shall meet the following requirements:

1. The pebble surface shall be graded according to the drainage direction.

2. Before paving the surface course, the foundation shall be cleaned and brushed with plain cement mortar once.

3. The thickness of cement mortar shall not be less than 100px, and the strength grade shall not be less than Ml0;

4. The pebbles shall be of coordinated color matching, clear particles, uniform size, clean particles and consistent arrangement direction (except for special requirements for mosaic).

5. The exposed pebbles shall be paved evenly, with narrow face upward, no obvious sinking particles, and reach more than 70% of the whole paved surface. The thickness of embedded mortar is 60% of the whole pebbles.

6. When the strength of the sand rack reaches 70% of the design strength, the stone surface shall be washed.

7. Expansion joints shall be set when the strip pebble pavement is more than 6 linear meters.

4、 The grass inlaid ground surface course shall meet the following requirements:

1. The block material shall be free of cracks and defects, and shall be laid stably with clean surface.

2. The planting soil shall be filled between the blocks. The thickness of the planting soil shall not be less than 200px. The filling surface of the planting soil shall be lcm~50px lower than the upper surface of the block.

3. Grass embedding shall be flat without ponding.

5、 The surface course of cement tiles, concrete slabs, granite, etc. shall meet the following requirements:

1. Before paving, the specification, size, appearance quality, color, etc. of the plate shall be preselected, soaked, wet and dried for use.

2. Cement of the same type, strength grade and color shall be used for pointing and pressing joints, and curing and protection shall be done well.

3. The surface of the surface course shall be clean, with clear patterns, consistent color, flat joints, consistent depth, straight edges, and plates without cracks, corners, missing edges and other defects.