1, material comes into play
2. Preparation of construction tools and instruments
3, water and electricity in place
Second, basic treatment
1, polish and repair unqualified ground.
Step 2 clean up the scene
Third, pay off the line
Use theodolite and level to determine the intersection of four straight dividing lines, use nails as construction marks, and then release the straight section of the sports ground. The marking line shall be in bright colors, and the first construction line shall be laid out along the straight dividing line, and then each construction line shall be laid out in turn from the inside out.
Four. Construction technology of 13mm thick breathable plastic runway surface
Grassroots cleaning → rubber particle elastic bottom layer →PU rubber particle anti-slip layer → line drawing.
(1) elastic layer of black elastic rubber particles (thickness of breathable bottom layer is 9- 10mm)
Materials: The plastic track material is made of one-component polyurethane rubber and black rubber particles (14- 16 mesh).
building technology
1, ready:
A) Check the equipment: prepare tools and check whether the packaged raw materials are leaking.
B) Make a small test according to the batch number of raw materials and observe the site laying.
C) Nail PVC pipe strips according to the construction line and thickness requirements.
2. Laying:
A) Material proportioning requirements: all components are mixed according to the specified requirements.
B) Mixing: after all the components are added into a special machine in proportion and fully mixed, the materials are poured into the paving area with special equipment.
C) Scrape the glue with an aluminum alloy scraper to ensure that the thickness of each part meets the design requirements. Iron plate in use and special experimental agent will be explored.
The laid particles are compacted.
D) Edge trimming: connect the edge seams with putty knife, and press down the rubber particles floating on the rubber surface.
(2) Colloidal antiskid layer (thickness 3-4 mm)
Materials: Group A, Group B, drier, PU particles (or EPDM particles), etc.
building technology
A. Material proportioning requirements: Group A: Group B: drier is mixed according to the specified requirements.
B thickness requirements: the total thickness is 1-2mm.
C, stirring: adding the components into a special machine in proportion, fully and evenly stirring, and pouring the materials into a high-pressure sprayer through special equipment.
Inside, the electric rod is started to spray back and forth on the surface of the paved elastic colloidal particles, so that all PU colloidal particles turn black.
The bottom layer is completely covered,
D, after the PU mucilage to be sprayed is completely dried, the second spraying is carried out, and the direction of the second spraying is crossed with the direction of the first spraying to ensure that
Ensure that all the places that have not been sprayed for the first time can be covered with PU mucilage.
(3) The line drawing process is as follows:
1, material: elastic polyurethane line paint. Material characteristics: wear resistance, no discoloration, strong adhesion.
2. Set the dotted line with the identified steel ruler and theodolite. The data of each point refer to the technical requirements of sports, and the relative error of internal control is 0-110000.
3, according to the dotted line and color.
4. Marking by spraying: After the rubber surface is laid clean, marking can be started. The steps are as follows:
A. First, retest seven foundation pile points, and after the error calibration is confirmed, measure them according to IAAF standards, draw various marking lines, draw lane separation lines with steel ruler, fix them with pins, and then connect the points vertically and horizontally with elastic threads.
B. Align the groove datum line with the positioning line, adjust the line paint, and then start spraying the driveway. Note that the bottom of the groove must be close to the road surface to prevent virtual edges.
C. List the starting point and ending point of each project, mark the lines according to different colors of different projects, mark them in their respective positions with theodolite, check whether all the marks are marked or not, check them again with theodolite, then check them again with steel ruler by radiation measurement, and then draw the above lines with different colors according to different projects.
D. When painting, it is necessary to repeatedly check whether the width of the spray box meets the IAAF requirements, and if not, it should be adjusted in time.
E. Spray painting operators should master the distance (from the plastic surface) and angle of the spray gun to make the lines beautiful and the colors uniform.
4), matters needing attention:
The weather must be good during the construction, and it can't rain within 4 hours after the construction. Construction in the morning should be carried out after the dew is dry. The plastic track field should be used reasonably to avoid long-term load, mechanical impact and friction and isolate the heat source. In case of rainy days, power outages and other special reasons, construction records should be made. In the process of construction, appoint special quality inspectors to deal with the problems found at any time to ensure the quality of engineering construction.