Five precautions for landscaping construction?

Garden projects include landscape management, terrain transformation, road construction, site paving, building construction, construction of engineering facilities, greening and planting, etc. From the design to the construction stage, it focuses on the completed landscape effect. The overall goal is to create a good living environment for animals and plants and create a garden-style green space. Nowadays, the scale of garden projects is becoming increasingly large. In actual operations, garden projects are often divided into several parts and entrusted to different units for construction. Therefore, there are often problems in project connection and construction cooperation. In addition, due to the special needs of some projects, plants are often planted during non-planting seasons. Next, let’s learn about five things to pay attention to during landscaping construction.

1. Preservation of original trees

If the original trees are determined to need to be preserved, measures should be taken to temporarily fence them before civil construction to avoid damage caused by grounding and burning. In order to prevent mechanical damage to the trunk and bark, straw bags should be used for protection. Especially for street trees, cushioning is sometimes required due to replacement of sidewalk boards or tree cavity boards. Lime and cement will cause soil alkalization and endanger the normal growth of trees. Therefore, during the construction process, the tree hole was first protected with soil and made into a mound with a height of less than 30 cm to avoid lime intrusion. If the cushion needs watering and maintenance, the tree hole should be enclosed in time or the water should be directed elsewhere. It is prohibited to pour water containing lime and cement into the tree hole.

2. Collection and restoration of topsoil

Soil is the basis for the growth of flowers, plants and trees, and the soil particles in the soil should preferably form an aggregate structure. The suitable pellet size for plant growth is 1 to 5 mm, with pores smaller than 0.01 mm, and root hairs cannot invade. Under normal circumstances, topsoil has a large amount of nutrients and useful soil aggregate structure. However, when transforming the terrain, the topsoil is often stripped off, which cannot ensure good growing conditions for plants. Therefore, the original topsoil should be preserved and effectively used during planting. During the collection and restoration of topsoil, in order to prevent heavy machinery from entering the site to compact the soil and avoid damage to the aggregate structure, it is best to use a reverse forklift to excavate the topsoil and proceed in one direction. The topsoil is best spread directly on the Do not pile them temporarily at the planned planting site to prevent surface consolidation. Excavating and spreading topsoil cannot be carried out after rain. The ground conditions during construction should be very dry, and machinery must not repeatedly roll over it. To avoid the formation of a stagnant layer on the restored ground, it must be well tilled when laying.

The foundation of the topsoil restoration site should be plowed to a certain thickness so that it can be integrated with the restored topsoil. The deep plowing method is used to allow the land to be exposed to wind and sun, so as to achieve the purpose of restoring the softness of the ground. If the subsoil quality is not good, the soil should be improved. The depth of soil improvement should be 80 to 100 centimeters (including the surface layer).

3. Cleaning up the green space

The tidying up of the green space is not just about clearing away garbage and pulling out weeds. The importance of this work is to provide good environment for trees and other plants. Growth conditions ensure that the roots can fully elongate, maintain vitality, and absorb nutrients and water. Therefore, heavy machinery must not be used to crush the ground during construction.

First of all, ensure that the root zone layer should be conducive to the balance of root elongation.

Generally speaking, the minimum thickness for the survival of the root zone of lawns and ground cover is 15 cm, 30 cm for small shrubs, 45 cm for large shrubs, 60 cm for shallow-rooted trees, and 90 cm for deep-rooted trees. cm; and the minimum thickness for plant cultivation is based on the minimum survival thickness for lawns and shrubs each increased by 15 cm, for shallow-rooted trees an increase of 30 cm, and for deep-rooted trees an increase of 60 cm.

Second ensure proper soil hardness.

Appropriate soil hardness can ensure full elongation of the root system, maintain good aeration and water permeability, and avoid soil compaction.

Third, ensure drainage and water permeability.

Therefore, when filling and preparing the land, it is necessary to ensure that the aggregate structure is good, and drainage facilities such as culverts can be set up if necessary.

Fourth, ensure proper pH value.

In order to ensure the good growth of flowers, plants and trees, it is best to control the soil pH value within the range of 5.5 to 7.0 or adjust it according to the pH preference of the plants being planted.

Fifth, ensure nutrition.

The best soil suitable for plant growth is 45% minerals, 5% organic matter, 20% air, and 30% water.

4. Planting of trees during non-planting seasons

The best transplantation period for trees is generally from the dormant period to before budding in spring.

The period for deciduous trees in North China is from late March to early April; from late October to late November. Evergreen trees can be planted from early March to early April; from late October to late November; they can also be planted in the rainy season, and should be done on cloudy and rainy days after entering the first fall. During the actual construction process, often due to time constraints or other special requirements, tree planting occurs during non-planting seasons. In order to ensure the survival of trees, appropriate technical measures must be taken. For off-season planting of deciduous trees, soil lumps are required. The diameter of the soil lumps ranges from 6 to 10 times the diameter at breast height. In addition to the soil lumps, the frequency of watering is increased compared with normal planting, and the branches and leaves are shortened to varying degrees depending on the species. Spray germination inhibitors and evaporation inhibitors to inhibit germination and reduce evaporation of water from the leaves. A root accelerator can be mixed in during irrigation to promote root growth. For old trees that are past their prime, large valuable trees, or trees that are not growing well, it is best to remove the roots if time permits. The ideal thing is to cut off the roots in the first spring and transplant them in the second and third springs. After cutting off the roots, reduce the number of branches and increase the number of fibrous roots at the broken roots to promote survival. The transplanting time should be under cloudy or shading conditions to facilitate survival.

5. Problems that are prone to occur when civil engineering and greening are constructed cross-cutting

Due to deadlines or other reasons, it is very easy for problems to arise when civil engineering and landscaping are constructed cross-cutting by different units, especially in masonry construction. In small aspects such as building curb stones and plant protection frames. Curbstones generally use stone or prefabricated concrete products. In order to ensure construction quality, the joints on the inside of the curbstone (that is, within the green space) must be reinforced with concrete as required to maintain stability. However, the shape and size of the concrete should be controlled on the premise of achieving stability, so that plants such as lawns or color blocks can reach canopy closure after normal growth, and there will be no lack of seedlings. Curb stones should also guide rainwater to the planting ground. Pay attention to the drainage slope and restraint capacity of the surrounding parts, and set up false water-conducting joints in advance.

During the production process, the foundation of the tree-planting frame should not exceed the design standard to avoid reducing the planting area. The concrete and gravel in the tree-planting frame should be removed in time before planting. As for the tree-planting protective frames with the function of sitting on the ground, the height is usually about 0.5 meters above the ground, which affects the planting depth of the plants. The construction sequence of first making the frame-protecting frame and then planting the trees must be strictly followed to avoid death caused by planting trees too deep. When existing tree protection frames or tree cave edge stones need to be replaced, the size of the protection frame and underground depth should be determined based on the growth of the tree root system. Do not cut off the lateral roots for the sake of the beauty of the protection frame. Trees may tilt or even be uprooted after wind and rain. , destroying the greening achievements in one day.

I believe that after the above introduction, everyone has a certain understanding of the five precautions for landscaping construction. Welcome to log in to Zhongda Consulting for more relevant information.

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