What are the basic requirements for highway subgrade maintenance?

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1. For the highway asphalt pavement, regular, timely and preventive daily maintenance should be carried out to ensure that the highway asphalt pavement is often in good technical condition, and to ensure that it provides a fast, smooth, safe, comfortable and economical driving environment for driving vehicles under large traffic volume and various conditions.

2. The daily maintenance of the highway pavement is generally carried out under the open conditions of large traffic volume and high-speed operation, and the working procedures should meet the following requirements:

1) Establish a sound inspection and technical testing system, establish a complete information network, timely and accurately grasp the pavement condition and related information, scientifically and objectively evaluate the quality of pavement use, and arrange maintenance projects in a grounded, planned and targeted manner.

2) Establish a high degree of traffic service awareness and safety awareness, in the road maintenance operation, should meet the needs of normal driving, and avoid complete closure of traffic operations and night operations.

3) In strict accordance with the relevant technical specifications and standards for maintenance operations, it is advisable to adopt mechanized maintenance operations to deal with all kinds of pavement damage and obstacles quickly, high-quality and efficiently to ensure the quality of operation.

4) Continuously explore and apply new materials, new equipment, new technologies and new processes to improve the timeliness, mobility, safety and reliability of maintenance operations.

3. For all kinds of diseases on the asphalt pavement of the expressway, they must be dealt with in a timely and rapid manner. When a disease is found that directly threatens normal traffic and driving safety, it should be repaired immediately or temporary transitional measures should be taken, and then repaired according to the relevant requirements.

1. Keep the road surface smooth, the cross slope moderate, the line straight, the road volume neat, and the drainage is good.

Strengthen road patrol inspections, grasp the road surface conditions, eliminate various factors that damage the road surface at any time, and repair them as soon as possible if the initial disease of the road surface is found.

It is forbidden for all kinds of tracked wheels and other rigid wheels for vehicles directly on asphalt roads.

on the road. Timely grasp of all kinds of maintenance technical data, the establishment of pavement maintenance technical files.

Classify. There are a variety of classification methods for asphalt pavement, which are divided into asphalt sand, asphalt soil, asphalt crushed (gravel) mixture, etc. according to different types of aggregates; According to the different varieties of asphalt materials, it is divided into: petroleum asphalt pavement, coal asphalt pavement, natural asphalt pavement and residual oil pavement.

However, the more common classification method is divided into asphalt concrete pavement, factory-mixed asphalt gravel pavement, asphalt penetrating pavement, road-mixed asphalt crushed (gravel) mixture pavement and asphalt surface treatment pavement according to its construction method, technical quality and use characteristics.

Pavement cleaning, pavement oil brushing, pothole repair, pavement grouting, road slope correction, roadside greening pruning, etc.

The general requirements for subgrade maintenance are:

1) Each part of the roadbed is often kept intact, and the size of each part is maintained according to the specified standard requirements, and it is not damaged and deformed, and it is often in good condition.

2) There are no ruts, potholes, bulges, subsidence and notches on the shoulder, the cross slope is moderate, the edge is homeopathic, the surface is smooth and solid, tidy, and the stubble with the road surface is smooth.

3) The slope is stable and firm, smooth and loose, and the slope meets the regulations.

4) Drainage facilities such as side ditches, drainage ditches, interception ditches, falling wells, and drainage grooves are free of plugs and high grass, and the longitudinal slope meets the requirements, the drainage is smooth, and the import and export are well maintained to ensure that there is no water accumulation in the roadbed, road surface and side ditch.

5) Retaining walls, slope protection, snow, sand and other facilities remain intact, and the drainage holes are not blocked.

6) Do a good job in the prevention, treatment and maintenance of diseases such as slurry, landslides, landslides, and debris flows, and try to shorten the time of blocking traffic.

Subgrade maintenance is a regular maintenance work to keep the subgrade and its ancillary annihilation equipment in a solid and stable state and ensure that the vehicle is unimpeded, including daily inspection and observation of the deformation of various parts of the subgrade, and timely prevention and remediation of diseases.

China has a vast territory, variable meteorology, complex geology, and diverse soil qualities (such as loess, fissure clay, soft soil, saline soil, permafrost, etc.). Subgrade diseases are also diverse, and it is closely related to geology, soil, meteorological and other conditions.

For example, in rainy, swampy and sedimentary areas, diseases such as foundation bed slurry and mud and subsidence of roadbed often occur; Frost damage occurs mostly in alpine areas; Diseases such as debris flows, landslides, and rockfalls often occur in mountainous areas. In addition, the subgrade design standards, construction technology and the current transportation volume of the land carrying length are not compatible, which is also an important factor in the occurrence of subgrade diseases.

The roadbed is a kind of geotechnical structure, which has to bear the load and be seriously affected by various natural conditions, so the maintenance of the roadbed is also quite complicated.

The subgrade disease should be prevented as much as possible, with "prevention first, equal emphasis on treatment, drainage and waterproofing, safety first" as the starting point, early treatment of small, more preventive engineering; For the remediation of some larger subgrade diseases, such as collapse, landslide, soft soil subsidence, foundation bed disease, large frost damage, etc., it is usually necessary to carry out detailed exploration tests, separate special design and engineering measures, such as anti-slide piles, drainage blind ditches, sand wells, sand cushions and geotextiles, etc.

Legal analysis: 1. Implement the policy of focusing on the prevention of eggplant dust, strive to eliminate the factors that cause road damage, enhance the durability of facilities, and improve the ability to resist natural disasters.

2. Pay attention to daily inspections, regular inspections and special inspections, accumulate technical data, strengthen scientific analysis, and take correct and effective technical measures for the causes of diseases.

3. Adapt measures to local conditions and fully explore the potential of the original engineering facilities to achieve the purpose of applicability and economy.

4. Try to adopt advanced scientific and technological achievements at home and abroad, implement scientific management methods, strengthen the intelligence system, and deal with problems on the highway in a timely manner.

5. Innovate road maintenance machinery and equipment, reform operation methods and labor organization accordingly, improve efficiency, and ensure the quality of the project.

Legal basis: Interim Provisions on Highway Maintenance and Management

Sixth highway maintenance tasks are divided into three categories according to the nature of the work:

Minor repairs and maintenance. It is to prevent and repair minor damage to the highway and all its closed-range equipment, and often keep the original intact state.

Large and medium repair projects. It is the repair of major damage to the highway and its equipment, or the addition or partial improvement of the original highway technical level.

Alteration works. It is to improve the technical level of the highway in phases and sections, or to significantly improve the passability of the highway through local transformation.

Article 7 Highways and their facilities, including the land demarcated on both sides, are socialist public property and may not be arbitrarily occupied or destroyed by any unit or individual. Transportation departments at all levels should work closely with local military and public security departments and social units along the route to mobilize the masses, government agencies, and schools to carry out propaganda and education on road protection and forest protection, and maintenance of traffic safety, and jointly do a good job in road administration management, maintain the integrity of highway equipment, and ensure traffic safety.

The basic requirements for pavement maintenance are as follows:

1. Asphalt pavement: in the daily maintenance, it is required to keep the road surface smooth, the road arch adapted, the lines straight, the road volume neat, and the drainage is good; If the initial disease of the road surface is found, it must be treated as soon as possible; It is strictly forbidden for all kinds of tracked vehicles to drive directly on the road surface without taking measures to protect the road surface.

2. Cement pavement: The maintenance and repair measures of cement concrete pavement are specifically divided into several aspects, such as preventive maintenance, corrective maintenance, large and medium repair of pavement and pavement improvement. Cement concrete pavement has a longer service life than other pavements when it is well maintained.

But once the damage starts to break, sometimes the damage develops quickly.

Therefore, it is necessary to do a good job in the erection and regular maintenance of the prelimb, find out the defects, find out the causes, and take maintenance measures in time to keep the road surface intact.

With the improvement of the grade, the large increase in traffic volume and the growth of materials, the maintenance cost is used in a large number of pavement, so pavement maintenance occupies an important position.

The content of maintenance work varies with the type of pavement: for low-grade gravel and gravel pavement, the main thing is the maintenance of flatness and road arch, the scraping of the wear layer and the replenishment of materials; For low-grade asphalt pavement such as asphalt surface treatment, it is mainly to fill pits, covers, remix or resurface loose materials, etc.;

For high-grade pavement, such as asphalt concrete pavement, there are excavation and repair of potholes, cracks, surface sealing and anti-skid measures; Cement concrete pavement is mainly the filling of joints, the filling of hollowing at the bottom of the slab and the replacement of local slabs.

The characteristics of pavement maintenance work are small and scattered, so the processing and processing of the required materials should be easy to access, the construction tools should be small and flexible, it is best to use one machine for multiple purposes, the noise should be low, the construction method should be fast and safe and do not affect or affect the traffic, the construction signs should be clear day and night, and the protection should be thoughtful to avoid traffic accidents.

Hello dear, I'm happy to answer for you, if it is a pavement of the Royal Book: in the daily maintenance of Zhihong, it is required to keep the road surface smooth, the arch adapted, the lines are straight, the road volume is tidy, and the drainage is good; If the initial disease of the road surface is found, it must be treated as soon as possible; It is strictly forbidden for all kinds of tracked vehicles to drive directly on the road surface without taking measures to protect the road surface. Cement pavement:

The maintenance and repair measures of cement concrete pavement are specifically divided into several aspects, such as preventive maintenance, corrective maintenance, large and medium repair of pavement and pavement improvement. Cement concrete pavement has a longer service life than other pavements when it is well maintained. But once the damage starts to break, sometimes the damage develops quickly.

Hello, what does the roadbed standard in the technical specifications for highway maintenance refer to the requirements of the Ministry of Transport's "Notice on Issuing the 2013 Annual Highway Engineering Standard Formulation and Revision Project Plan" (Hall Highway Zi [2013] No. 169), the Ministry of Transport Highway Research Institute as the editor-in-chief unit to undertake the formulation of the "Technical Specifications for Highway Subgrade Maintenance" (JTG HXX-202X). The compilation group of this specification systematically sorts out and summarizes the existing subgrade maintenance technology research and engineering application results, widely solicits opinions, carries out a large number of technical demonstration work, and comprehensively stipulates the technical management of subgrade, subgrade condition investigation and evaluation, daily maintenance, maintenance engineering design and technical requirements. The main content of the revised specification includes 11 chapters and 1 appendix, and its technical content includes:

Basic provisions, investigation and evaluation of subgrade conditions, daily maintenance of subgrade, design requirements of subgrade maintenance engineering, treatment of embankment and roadbed diseases, treatment of slope diseases, treatment of existing protective and supporting structures, maintenance of drainage facilities and maintenance of special roadbed and treatment of diseases.