What are the key processes that should be grasped in road construction?

Roadworks:

1. Measurement pay-off and preliminary geotechnical test:

During the construction of the project, a group of central piles is set every 20 25m in the whole section, and the pile point control of the start, middle and end points of the curve section needs to be done, and the middle point of the curve is made of infill piles at 5 10m intervals; A temporary leveling point is set every 100m, which is numbered sequentially; A group of side piles is set up every 20m in each flow operation section, and the corner line of the surrounding slope is released according to the design road section. During the construction process, if the pile point is misplaced or lost, it should be corrected or repaired in time.

2. Test section:

Before the construction of the roadbed, a representative road section with a length of not less than 100m is selected as the test road section under the supervision engineer next to the station and the road section is selected as the test section to carry out the compaction test; And report the test results to the supervising engineer for approval. During the test, the type of equipment, the best man-machine combination, the number of rolling passes, the rolling speed, the loosening thickness and moisture content of each layer of material were recorded.

The basis for determining the construction sequence is as follows:1. According to the arrangement of the construction sequence agreed in the contract, such as key projects, difficult projects, projects that control the construction period and projects that have a greater impact on the follow-up, it is determined to start construction first;

2. Determine the construction sequence according to the requirements of the design drawings or design data;

3. Determine the construction sequence according to the requirements of construction technology, construction specifications and operating procedures;

4. Determine the construction sequence according to the requirements of the overall construction organization and management of the construction project;

5. Determine the construction sequence in combination with the construction machinery and the actual situation of the construction site;

6. Determine the construction sequence according to the status of local resources and purchased resources.

Summary. Hello dear, all processes of road construction are available: road bed construction and cushion construction.

1. Roadbed construction:

Measurement pay-off and preliminary geotechnical test, a group of central piles are set every 20 25m in the whole section during the construction of the project, and the pile point control of the start, middle and end points of the curve section needs to be done. Soil tests are carried out at the source of the soil to provide various test data for earthwork and roadbed construction.

Test section, before the construction of the roadbed, under the supervision engineer next to the station, select a representative road section with a length of not less than 100m as the test road section to carry out the compaction test; And report the test results to the supervising engineer for approval.

2. Cushion construction.

After the subgrade work is completed in part of the subgrade earthwork, the pavement work can carry out the construction of the cushion layer on the road section that has passed the inspection, and the one-stop operation of layered stacking, grader mixing and paving, road roller rolling, and sprinkler sprinkling maintenance can be carried out.

What are the processes involved in road construction?

Hello dear, all processes of road construction are available: road bed construction and cushion construction. 1. Roadbed construction:

Measurement pay-off and preliminary geotechnical test, a group of central piles are set every 20 25m in the whole section during the construction of the project, and the pile point control of the start, middle and end points of the curve section needs to be done. Soil tests are carried out at the source of the soil to provide various test data for earthwork and roadbed construction. Test section, before the construction of the roadbed, under the supervision engineer next to the station, select a representative road section with a length of not less than 100m as the test road section to carry out the compaction test; And report the test results to the supervising engineer for approval.

2. Cushion construction After the subgrade work is completed in part of the subgrade earthwork, the pavement work can be carried out on the road section that has passed the inspection of the cushion construction, layered stacking, grader mixing and paving, road roller rolling, sprinkler sprinkling maintenance of the one-stop operation.

I mean all the processes of pipeline construction on the main road, big and small.

1. Measurement pay-off 2, trench excavation 3, foundation construction 4, pipeline installation 5 quality standard 6, backfill.

1. Preparation before construction; Arrange in advance the traffic problems at the construction site, as well as the water and electricity problems of the residents around the construction.

2. trench excavation; Trench excavation is carried out at the project site.

3. For the construction of drainage pipelines; In order not to affect the lives of surrounding residents, it is necessary to properly deal with the drainage pipe problem without affecting the construction.

4. Pipe pit backfilling; When the drainage pipes are properly completed, the pipe pit soil needs to be backfilled.

5. Subgrade construction; Construction of the roadbed began.

6. Pavement structure construction; Structural construction began.

7. Completion acceptance, clearance and exit.

The process of road engineering construction is as follows:

Before construction, a drainage ditch is excavated in the north direction of the road width, and the rainwater and groundwater in the construction area are discharged into the rainwater intersection well, and the rainwater and groundwater in the east construction area are discharged in an organized manner, and then a section of the drainage earth canal is discharged to the farmland drainage system, and the slope of the soil canal is 1%. After the south side of the road width is cleared, the ditch is dug again, and the drainage direction is the same as the north side of the road width, and a temporary drainage culvert of DN1000 is set up to discharge the water of the south width to the north width, and it is discharged uniformly after collection.

The vegetable fields and farmland surface planting soil and seedlings need to be removed first, and bulldozers and excavators supplemented by manual cooperation should be used to clean up and remove the topsoil, turf, trees, tree roots, construction waste and other unsuitable materials within the construction range. After exploration, the thickness of the surface dredging soil layer is about 1m, and the amount of surface (silt) earthwork is more, so the spoil scheme can only be adopted, because the project is constructed in the rainy season, in order to ensure the dredging effect and prevent soil erosion in the construction.

Re-investigate the soft foundation of the low-lying and long-term waterlogged road sections to understand the depth, scope, soil quality and surrounding geological conditions of the soft foundation, and at the same time investigate the groundwater level to understand the water source. On the basis of the soft foundation on-site investigation, according to the design requirements, on-site investigation, test, etc., the soft foundation treatment construction plan and measures are formulated. According to the treatment plan, determine the construction machinery and equipment and materials for soft foundation treatment.

Strictly according to the depth of the supervision and the owner's instructions, after the dredging is clean and thorough, the base is rolled with a road roller.

The silt near the embankment will be excavated and transported away, after the dredging is approved by the superintendent, it is immediately compacted with soil backfill, and then the next piece is carried out, and the car is driven on the roadbed after the backfill during dredging, so as to reduce the amount of transfer work of the excavator. During dredging, if the groundwater is abundant, the first layer of backfill can be made of brick ballast after the demolition of the buildings along the line, and if necessary, the throwing stone can be used. The sludge is loaded with an excavator and transported to the dump area by dump trucks.

Municipal Practice: What are the basic processes of roadbed construction?

1. Open temporary sidewalks to try not to affect the travel of citizens.

2. Surface dredging: first excavate a trench in the northward direction of the road width to collect rainwater in a centralized manner.

3. Subgrade earth and stone filling: The subgrade is the main body of the road and the foundation of the pavement, which must have sufficient strength and overall stability to meet the design and use requirements.

4. Drainage construction: The main drainage pipe is arranged along the green belt of the road, mainly to prepare for road drainage and greening.

5. Grassroots: pavement construction.

The basic process mainly includes: excavation trench, pipeline laying, trench backfilling, roadbed leveling, road cushion, road base, road surface layer and other 7 items. This is just a complete construction process, and the specific construction methods and processes are very complicated processes.

Municipal road construction should be based on the actual situation of the site to determine the construction process and construction sequence, but generally speaking: earthwork, roadbed, base, middle and lower layer, wellhead reinforcement, side stone installation, sidewalk bricks, upper layer.