Rural cement roads are different from urban road construction because rural roads are more laxly managed and often face the problems of overloading and overloading of vehicles. In order to ensure the quality of rural cement road construction, not only the active efforts of construction personnel, management personnel and construction units are needed, but also good quality monitoring of road construction is required.
Efficient road construction quality monitoring can not only regulate the construction operation habits of construction personnel, but also help managers and construction personnel to establish engineering quality awareness. In this context, it is extremely necessary for the author to explore and analyze the quality monitoring of rural cement highway construction.
1 Objective existence of quality-related monitoring strategies in the environment
1.1 Quality-related monitoring strategies for construction materials and equipment
First of all, ensure the quality of building materials procurement and machinery and equipment procurement or leasing. Select manufacturers with a certain reputation, and check the relevant information certificates of manufacturers when choosing. Road construction procurement department in the procurement of building materials to be based on the construction needs of the project, and to conduct a series of market research, and then determine the purchase price after comparison.
Secondly, strengthen the quality inspection and random check of the construction materials and machinery and equipment put into construction. This can avoid the damaged machinery and equipment caused by wear and tear or improper storage to enter the construction process. In addition to the inspection of machinery and equipment, construction building materials, construction techniques and new technologies are also in the scope of review.
In addition, in addition to checking the quality of machinery and equipment, regular care management and maintenance of machinery and equipment should be carried out to ensure that they are in the best condition when they are put into construction.
Finally, after the procurement of materials is completed, the transportation, unloading and storage of machinery and equipment should be strictly managed, and special management personnel should be assigned to carry out the corresponding management. The storage environment for building materials must be kept dry, and it is best to choose a location with high terrain and hard soil. Some large machinery and equipment need to be disassembled and transported, and special personnel should be assigned to assemble them when assembling.
1.2 Quality control strategy of construction technology
Construction technology is the basis for completing the construction of cement highways, and the good application of advanced technology can not only ensure the construction quality of airport cement highways, but also shorten the construction time, speed up the construction progress, and ensure that the rural cement highways are completed within the specified construction period. Therefore, we must pay attention to highway construction technology monitoring, and improve the quality of highway cement highway construction technology monitoring from the following points.
The first point, the reasonable choice of technology. Each construction technology is particularly applicable to the construction period and, the appropriate construction program to complete the overall construction safety, not applicable construction technology not only can not ensure the smooth construction of the project, but also cause highway safety hazards, so, according to the construction phase, construction environment and construction requirements to choose construction technology;.
The second point, improve the professional quality of construction personnel. Construction technology is executed by people, if the construction personnel do not understand the technology, not familiar with, lack of professional skills, that the quality of engineering construction will not be guaranteed;.
The third point, do a good job of technical delivery. Thorough and efficient technical briefing can help construction technicians understand and master the construction technology of highway engineering, so it is necessary to do a good job of engineering technology briefing before the project construction is carried out.
1.3 Quality control corresponding strategy of construction personnel
As the construction workers of the rural cement highway, the supervision of them is a key part of the quality management of the whole cement highway. Therefore, we must pay attention to the monitoring and management of highway construction personnel, and carry out the monitoring and management of highway construction personnel from two aspects: ensuring the quality of highway construction, regulating the construction operation of construction personnel and ensuring the personal safety of construction personnel. Only around these two points of construction personnel quality control work, in order to avoid the highway construction process due to personnel errors caused by safety and quality accidents. In order to ensure the effective implementation of construction personnel quality control, to assign special construction quality of safety supervisors, for the construction of specific links to carry out construction personnel monitoring work.
2 subjective factors quality control strategy
Construction personnel and engineering management personnel subjective reasons for the quality of rural cement road construction problems are countless, in order to avoid or reduce these subjective factors caused by road quality problems, the author proposed measures for the subjective factors, specifically as follows.
2.1 The implementation of a unified management system
The management system belongs to an important aspect of quality control of rural cement roads. The setting of the system must consider multiple opinions and integrate various factors. According to the relevant regulations in China, the quality supervision station is responsible for monitoring the quality of cement roads through villages. It is significant that the construction unit at the county level, as the main contracting construction unit, is responsible for the group of rural companies’ supervisory departments and the daily management of rural roads.
2.2 Qualification review is the basic work
Rural highway construction related qualification review, the development side out of the requirements, the quality inspection company and supervision company to check the daily work and project safety, including the quality of equipment and materials, and finally issued a regular quality inspection and supervision report, the development and construction side according to the quality inspection or supervision report, require the construction side to repair, which construction capacity and quality of major problems, can replace the construction unit, in order to ensure the overall quality of the project.
3 Measures for quality control of inter-village cement highway
3.1 Establishment of quality supervision liaison department
Quality supervision department is divided into multiple layers, in the early stage, the design institute and supervision company to do overall assessment of the construction unit’s plot, report the relevant materials, materials through, before the construction, reported departments have planning, land and other departments, the later design department to monitor whether the construction side according to the design plan, supervision company is also responsible for the approval of drawings and construction plans, the construction side also sent quality supervision personnel to supervise the project The construction company is also responsible for the approval of drawings and construction plans, and the construction party also sends quality control personnel to supervise the project to ensure the safety of the finishing project and the quality of the project. Quality supervision and liaison department is a relatively important quality control department.
3.2 Skill training for construction personnel
Improve the professional quality of construction personnel and supervisors. The irregular operation of construction personnel will lead to construction quality problems, and the improvement of their professional quality is conducive to the guarantee of construction quality. Highway construction supervisors have the important responsibility to ensure the smooth construction of highway projects and find the loopholes of engineering construction quality, and the improvement of their professional quality is conducive to killing the construction quality problems in the cradle. Therefore, the construction personnel and quality supervision should be trained in professional quality to help them establish the awareness of engineering quality.
3.3 Set the quality target of highway construction
Setting construction quality objectives and managing quality management objectives efficiently are conducive to the construction unit’s improvement of quality control of highway projects. The construction plan stipulates the relevant construction targets and requirements, and the construction personnel should carry out construction according to the construction targets, which should not be larger or smaller than the construction targets, but only within the range required by the construction targets, and also according to the project progress requirements, with each work being carried out reasonably and divided into tasks to ensure time and labor saving, and the admission of materials in advance, with all links cooperating. It is necessary to implement it effectively into practice and make the best efforts to accomplish the goal.
3.4 Improve the highway site management system
The soundness of the system mechanism can provide the basis and guarantee for the quality management of the project. The current construction units generally have the problem of unsound engineering construction quality management system, some even with the corresponding perfect system, but the specific implementation is often perfunctory, this status quo and attitude greatly hindered the development of engineering construction quality management work.
Therefore, the construction unit must improve the corresponding quality management system and the effective implementation of the system to the daily construction quality management. To effectively implement the system to the quality management work, it is necessary to improve the construction unit to the quality management of highway construction, so that they understand the importance of construction quality management to the smooth development of the entire highway project. In addition, it is also necessary to strengthen the construction safety management and quality management publicity, popularize the knowledge of highway engineering construction safety.
4 common diseases of rural village cement highway treatment
4.1 The treatment of cement concrete pavement cracking problem
Cement concrete pavement is a rigid pavement, the general situation in 4 ~ 5 m need to saw joints. Cement concrete pavement is subject to the principle of thermal expansion and contraction, and its internal stress will cause cracks in cement concrete pavement without saw joints. Of course, poor foundation and excessive load are also common factors that cause pavement cracks on rural road pavements.
Rural pavement cracks appear in many cases, the cracks of different widths or lengths should take relative methods for suitable patching, the conventional methods mainly include direct grouting method, expansion grouting method, pressure grouting method and strip cover method, etc. For cracks in cement concrete pavement with a width greater than 3 mm and without fragmentation, the direct grouting method can be adopted. Specific practices are.
Blow out the debris and dust inside the seam with compressed air to ensure that the seam is free of water and debris and kept dry. Apply polyurethane primer layer on the pavement along 3 cm of the second side of the seam and inside the seam, the thickness is 0.3±0.1 mm, and the amount of primer is 0.15 kg/m2.
The grouting materials such as epoxy resin and curing agent are prepared in proportion, mixed well, and then directly poured into the joints for 2-4h maintenance, which can be open to traffic.
The crack can be reamed and grouted when the width of the upper surface is not greater than 3mm, and the crack can be repaired by expanding the gap to a slot no greater than 2 cm, while ensuring that the depth of the trench does not exceed 1/3 of the plate thickness, cleaning the trench to ensure that there is no water or debris, and then filling the trench with fine diameter stone chips, and then using materials such as asphalt or epoxy resin mortar to grout.
Use the method of strip cover to repair when the crack is suitable between 3 and 15 mm, drill two slits on both sides of the crack at a distance greater than 1 5 cm and clean the debris dust in the slit, the depth of the slit shall not be greater than 7 cm, and then punch a round hole on each side of the crack every 50 cm apart, inject mortar in the hole, use a round nail with a length greater than 20 cm embedded in the hole, and finally lay the concrete on the Smooth it out and compact the surface. When greater than 15 mm road crack width is required to use the full depth patching method or block cutting method to repair, which also applies to other matching programs and other related measures.
4.2 Treatment of road surface debonding
Sometimes when the car travels in the road, there will be bam empty sound, which is possible to be the bottom of the plate out of the air, if not dealt with for a long time, the road will occur crushed, or plate powder, shaking plate, the vehicle will be warped, if the heavy vehicle through, may cause a rollover, to deal with this situation, the early can be pressed iron plate, for protection, later to carry out a comprehensive repair, infusion method is more commonly used The method of grouting is more commonly used, the time is also short, monitor the area of the debris, drilling and grouting, the number of holes in the unit panel should not be too many, generally to 5 as the upper limit, the average distribution, injection, the hole should not be too large, according to the construction regulations can be, after the completion of drilling, to clean up debris and dust, to ensure clean, to prevent discontinuous grouting, then you can start grouting, grouting methods are manual or machine two, now commonly used machine more If the slurry is dry, it will not reach the best effect and will not be filled evenly, so it can be injected with 5% water for dilution, and after injection, the hole should be plugged with suitable wooden or iron filler.
4.3 Repair and treatment of misalignment
Wrong table repair way is relatively single, generally is the machine repair and hand repair two ways, according to the wrong table procedure, choose a suitable method, such as wrong table size, but the level of high and low wrong is not large, also available grouting, processing, dry for repair and leveling can be, such as the upper and lower wrong table such as larger, more than 10 cm, to use the filling method for leveling treatment, to high fill low, the overall find level, to ensure the smoothness of the road, such as wrong If the amplitude of the wrong table is too large, the wrong table corner can be cut horizontally to fill the seam processing, before filling the seam to deal with the dust, after processing clean, to prevent the adhesion of the material and seam.
From the system, personnel quality, quality awareness, construction technology and monitoring management to improve the quality of rural cement highway construction is a long-term process, it is impossible to be achieved overnight, and this process requires the cooperation of the parties involved in the construction of the project and the joint efforts of the construction personnel, only in this way we can ensure the quality of rural cement highway construction, in order to ensure the economic development of rural areas.