Construction method for subway engineering vehicle depot landscape ecological tree pool

Abstract

The invention discloses a construction method for a subway engineering vehicle depot landscape ecological tree pool. The construction method comprises the following steps that S1, earth excavation is conducted; s2, laying waterproof geotechnical cloth and constructing perforated collecting pipes; s3, concrete foundation trench wall construction; s4, laying a bottom gravel drainage layer; s5, laying planting soil; s6, laying an upper gravel drainage layer; the method has the advantages of being good in soil fixation performance, high in water locking performance, high in bearing capacity, high in permeable rate, obvious in dust reduction effect, attractive, easy to clean and the like, the overall appearance effect of the outdoor landscape of the subway station depot is improved, and meanwhile the functions of preventing soil hardening and water accumulation, reducing dust raising pollution and the like are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a construction method for a landscape ecological tree pool for a subway engineering vehicle section. Background Art

[0002] In recent years, my country's infrastructure construction has developed rapidly. The subway depot project (a place for the operation, management, parking, repair and maintenance of vehicles in the urban rail transit system) is one of the most representative projects. The outdoor landscape tree pool of the depot is an important part of the entire project.

[0003] Due to the frequent micro-seismic impacts of subway in and out, soil in outdoor landscape tree pits often flows out and pollutes the road. In the rainy season, there will be a series of thorny problems such as water accumulation in the pit and workers accidentally falling into the tree pit. In order to avoid such problems, the soil in the tree pit is usually compacted and reinforced. This method can solve the problem in a short period of time, but from a long-term perspective, it essentially cannot solve the problems of soil loss, dust pollution, poor water permeability, etc. It is also easy to cause soil compaction, which has an adverse effect on the growth of trees.

[0004] How to make the landscape tree pool of the subway depot have good soil solidity, strong water lock, high water permeability, and at the same time improve the overall appearance of the outdoor landscape is an urgent problem to be solved. Summary of the invention

[0005] The present invention aims to provide a construction method for a landscape ecological tree pool in a subway engineering vehicle depot in view of the deficiencies of the prior art, comprising the following steps: S1. Earthwork excavation: After laying out the lines, dig the earth manually with a pickaxe. After the earthwork excavation is basically completed, check the elevation of each point; S2. Laying of waterproof geotextile and construction of perforated collection pipe: After cleaning the debris in the tree pit base trench, lay a layer of waterproof geotextile, and then lay the perforated collection pipe. Make holes inside the ecological tree pit, but not outside the tree pit; S3. Construction of concrete foundation trench wall: After the formwork is made, concrete pouring is carried out, and maintenance should be carried out in time after the construction is completed; S4. Laying the gravel drainage layer at the bottom: Lay the gravel evenly on the waterproof geotextile. Keep the flatness and uniformity of the gravel during laying, and fully compact and solidify it. S5. Planting soil laying: Before filling the soil, lay a layer of permeable geotextile first, and then lay the filling soil in layers; S6. Laying of upper gravel drainage layer: Lay gravel evenly on the planting soil with a thickness of 250mm. The laying method is the same as that of the bottom gravel drainage layer. S7. Installation of finished stainless steel grates and tree pit curbs: Install the finished stainless steel grates on the upper gravel drainage layer, and then install the curbs around the edges.

[0006] Preferably, in step S2, the geotextile is installed with a width of not less than 200 mm, the diameter of the perforated collecting pipe is DN150 mm, and it is made of UPVC material.

[0007] Preferably, in step S3, the grade of the concrete is C20, and the wall thickness of the concrete foundation trench is 150 mm.

[0008] Preferably, in step S4, the thickness of the gravel drainage layer is 300 mm.

[0009] Preferably, in step S5, the filling depth of the planting soil is 1.3 m, and the laying thickness of the planting soil is between 150 and 300 mm.

[0010] Preferably, in step S7, the thickness of the finished stainless steel grate is 10 mm.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention has the characteristics of good soil fixing, strong water locking, high bearing capacity, high water permeability, obvious dust reduction effect, beautiful appearance and easy cleaning, while improving the overall visual effect of the outdoor landscape of the subway station depot, it also has the functions of preventing soil compaction, preventing water accumulation, and reducing dust pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 Tree pool grate large sample drawing; Figure 2 Ecological tree pool construction diagram; Figure 3 Large-scale drawing of the stone material for the tree pool edge; Figure 4 Schematic diagram of the ecological tree pool walkway. DETAILED DESCRIPTION

[0013] The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0014] Reference Figures 1 to 4 The present invention provides a construction method for a landscape ecological tree pool for a subway engineering vehicle depot, and the construction steps are as follows: S1. Earth excavation: After laying out the lines, the soil is carefully dug with a pickaxe. After the excavation is basically completed, the elevation of each point is checked again. Manual excavation can well control the edge of the tree pit construction area and avoid disturbing the foundation soil of the sidewalk.

[0015] S2. Laying of waterproof geotextile and construction of perforated collection pipes: After cleaning the tree pool base, lay a waterproof geotextile, the width of which should not be less than 200mm; then lay a perforated collection pipe (DN150mm can be made of UPVC material); open holes inside the ecological tree pool, but not outside the tree pool, with a hole diameter of 3mm. The waterproof geotextile can effectively prevent soil erosion, prevent water erosion, and improve soil quality. The perforated collection pipe can discharge the water in the tree pool into the nearby municipal rainwater pipe network.

[0016] S3. Construction of concrete foundation trench wall: After the template is made, the concrete is poured. The concrete grade is C20 and the concrete foundation wall thickness is 150mm. After the construction is completed, it should be maintained in time. This method uses concrete as the foundation wall to effectively control the external water from entering the tree pit and damaging the soil quality. The tree pit has good integrity, strong vibration resistance, and is not easy to deform.

[0017] S4. Laying of bottom gravel drainage layer: Lay the gravel evenly on the waterproof geotextile. The thickness is 300mm. When laying, the flatness and uniformity of the gravel should be maintained, and it should be fully compacted and solidified. The gravel drainage layer has strong permeability and stability and is an important part of the ecological tree pool drainage system.

[0018] S5. Planting soil laying: Before filling, lay a layer of permeable geotextile first, the filling depth is 1.3m, and the filling is laid in layers. The thickness is usually 150~300mm. The specific layered thickness of the planting soil depends on the type of plant and its growth requirements.

[0019] ‌S6. Laying of upper gravel drainage layer: The gravel is evenly laid on the planting soil with a thickness of 250mm. The laying method is the same as the bottom gravel drainage layer. The upper drainage layer can prevent ground construction waste, fallen leaves, etc. from entering the tree pit and polluting the planting soil, protecting the normal growth of plants. At the same time, it has a certain bearing capacity and is not afraid of being trampled by pedestrians, forming an upper protective layer for the tree pit.

[0020] S7, Installation of finished stainless steel grates and tree pool curbstones: Finally, install the stainless steel finished grates on the upper gravel drainage layer, and then install the surrounding curbstones. The stainless steel finished grates are 10mm thick, and the specific style of the grates can be customized in coordination with the manufacturer. While preventing the gravel layer from scattering, it plays an important role in improving the overall outdoor landscape beauty of the vehicle depot.

[0021] As above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes may be made to it in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A construction method for a landscape ecological tree pool in a subway engineering vehicle depot, characterized in that: The steps include: S1. Earthwork excavation: After laying out the lines, dig the earth manually with a pickaxe. After the earthwork excavation is basically completed, check the elevation of each point; S2. Laying of waterproof geotextile and construction of perforated collection pipe: After cleaning the debris in the tree pit base trench, lay a layer of waterproof geotextile, and then lay the perforated collection pipe. Make holes inside the ecological tree pit, but not outside the tree pit; S3. Construction of concrete foundation trench wall: After the formwork is made, concrete pouring is carried out, and maintenance should be carried out in time after the construction is completed; S4. Laying the gravel drainage layer at the bottom: Lay the gravel evenly on the waterproof geotextile. Keep the flatness and uniformity of the gravel during laying, and fully compact and solidify it. S5. Planting soil laying: Before filling the soil, lay a layer of permeable geotextile first, and then lay the filling soil in layers; S6. Laying of upper gravel drainage layer: Lay gravel evenly on the planting soil with a thickness of 250mm. The laying method is the same as that of the bottom gravel drainage layer. S7. Installation of finished stainless steel grates and tree pit curbs: Install the finished stainless steel grates on the upper gravel drainage layer, and then install the curbs around the edges.

2. The construction method for a landscape ecological tree pool for a subway engineering vehicle depot according to claim 1 is characterized by: In step S2, the geotextile is installed with a width of not less than 200 mm, the diameter of the perforated collecting pipe is DN150 mm, and it is made of UPVC material.

3. The construction method for a landscape ecological tree pool for a subway engineering vehicle depot according to claim 2 is characterized by: In step S3, the grade of the concrete is C20, and the wall thickness of the concrete foundation trench is 150 mm.

4. The construction method for a landscape ecological tree pool for a subway engineering vehicle depot according to claim 3 is characterized by: In step S4, the thickness of the gravel drainage layer is 300 mm.

5. The construction method for a landscape ecological tree pool for a subway engineering vehicle depot according to claim 4 is characterized by: In step S5, the filling depth of the planting soil is 1.3m, and the laying thickness of the planting soil is between 150 and 300mm.

6. The construction method for a landscape ecological tree pool for a subway engineering vehicle depot according to claim 5 is characterized by: In step S7, the thickness of the finished stainless steel grate is 10 mm.

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