How to set out arc in garden construction.

There are two kinds of garden roads in garden landscape: linear and circular, and the construction of linear is relatively easy. However, circular arc is more difficult. If you don't pay attention to pay-off and edge grinding, the finished product can be said to be very ugly. Because the beauty of circular-arc garden road is influenced not only by the paving materials and styles, but also by the paving lines.

The width of the concrete foundation of Huayuan Road is 2-3 cm wider than the width of the road surface, and an expansion joint is set every 6-8 meters ... The concrete cushion should be cleaned before the surface layer is laid. If cement mortar falls off the surface layer during construction, it must be wiped with a dry cloth in time. After the completion of the ground, the finished product should be protected in time to ensure that the surface layer is not polluted.

Precautions for PVC pipe lofting: When lofting the arc-shaped garden road, the flexible PVC pipe can be bent into a natural arc as the reference line for the direction of the garden road, and the specific position can be fine-tuned according to the drawings and the actual situation on site to ensure the smooth line of the garden road (recommended? 25mm in diameter), in the arc section of road intersection, pay attention to the secondary processing of leftover materials according to the radian of the site.

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Matters needing attention in garden construction:

1, the preservation of the original trees?

The original trees shall be reserved, and measures shall be taken for temporary enclosure before civil construction to avoid damage caused by practicality and burning. In order to prevent mechanical damage to the trunk and bark, straw bags should be used for protection. Especially for street trees, sometimes it is necessary to make a cushion because of replacing sidewalk boards or tree hole boards. Lime and cement will cause soil alkalization and endanger the normal growth of trees.

2. Adoption and restoration of topsoil?

Soil is the basis for the growth of flowers and trees, and the soil particles in the soil had better form aggregate structure. The aggregate suitable for plant growth has a diameter of 1~5mm, and its pores are less than 0.0 1mm, so the root hairs cannot invade. Generally speaking, topsoil has a lot of nutrients and useful soil aggregate structure, but it is often stripped off when the terrain is transformed, which can not guarantee good growth conditions for plants.

3. Layout of green space?

The layout of green space is not simply to remove garbage and pull out weeds. The importance of this operation lies in providing good growth conditions for plants, ensuring that roots can fully elongate, maintain vitality and absorb nutrients and water. Therefore, heavy machinery shall not be used to crush the ground during construction. ? It is necessary to ensure that the root zone layer is conducive to the elongation balance of the root system, that the soil hardness is appropriate, and that the drainage is permeable.

4. Planting trees out of season?

The best transplanting period of trees is from dormancy to germination in spring. Deciduous trees in North China are from late March to early April, from late 10 to late 1 10; Evergreen trees in early March to early April, and in late June, 65438+1October to1late October165438+1October. Transplanting can also be carried out in rainy season, and it should be carried out in rainy days after entering the head. In the construction process, due to time constraints or other special requirements, off-season transplantation occurs from time to time. ?

5, civil engineering and greening cross construction?

Due to the construction period or other reasons, problems are easy to occur when civil engineering and greening are constructed by different units, especially in laying kerbs, plant protective frames and other small links. Usually, kerbs are made of stone or precast concrete products. In order to ensure the construction quality, the joints on the inner side of kerbs (i.e. in the green space) must be reinforced with concrete as required to maintain stability.