CN109944131B - Parking apron repairing construction method - Google Patents
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- CN109944131B CN109944131B CN201711385216.4A CN201711385216A CN109944131B CN 109944131 B CN109944131 B CN 109944131B CN 201711385216 A CN201711385216 A CN 201711385216A CN 109944131 B CN109944131 B CN 109944131B
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Abstract
The invention discloses a parking apron repairing construction method, which comprises the following steps: preparing straight reinforcement construction, constructing straight reinforcements, and pouring a cement concrete transition plate, wherein the construction sequence of the pavement comprises paving a first base layer on the cement concrete transition plate and the new concrete plate surface, so that the first base layer and the old concrete plate surface are positioned on the same horizontal plane; paving a second base layer with a certain thickness on the first base layer and the old concrete slab; and paving an asphalt concrete surface layer with a certain thickness on the second base layer. The problem that cracks are easy to appear at the lap joint of the rigid foundation and the flexible foundation can be effectively solved by pouring the cement concrete transition plate between the new parking apron and the old parking apron; by using the kerosene-proof asphalt concrete on the surface layers of the new and old parking ramps, the oil stain resistance of the asphalt concrete surface layers can be obviously improved, and the service life of the parking ramps is greatly prolonged.
Description
Technical Field
The invention relates to a construction method for additionally paving concrete on a airport pavement, in particular to a method for repairing and constructing an air park.
Background
With the increasing development of world economy, aviation travel becomes the choice of more and more people. However, at present, many airports have the conditions of small scale, old equipment, serious damage to runway apron and the like, so that the renovation and the extension of the existing airports are necessary. Since the extension and the overhaul of a plurality of airports are in a non-navigation state, the construction is undoubtedly hindered, and a plurality of difficulties are met in the technical aspect.
The Chinese CN103422410A patent relates to a construction method for additionally paving a concrete precast slab on an airport pavement, and discloses a construction method for additionally paving a concrete precast slab on an airport pavement without stopping the navigation, which comprises the steps of surface damage treatment of the original pavement, paving an isolation leveling layer, paving the concrete precast slab, joint treatment, reserved connecting groove treatment of the concrete precast slab, connection of a newly paved pavement and the original pavement, shoulder treatment and connecting pavement treatment. The construction method can not solve the problem of oil pollution prevention of the parking apron.
Chinese CN201110460037.9 patent discloses a method for constructing asphalt road, in which the construction of surface layer of asphalt road surface includes the following steps: 1) construction lofting; 2) spraying permeable asphalt and adhesive asphalt; 3) trial paving in a test section to verify whether a preset construction scheme is feasible or not; 4) and (5) performing site trial test. The construction method is suitable for the construction of asphalt roads and is not suitable for the laying of special pavements.
The existing repairing work of the parking apron mainly uses cement for hard reinforcement, so that cracks are easy to generate; the foundation of the joint of the new and old parking apron is not firmly lapped, and the problems of faults or cracks and the like are easy to occur; the parking apron is the place where kerosene is leaked most seriously by the airplane, most parking aprons do not have the function of oil stain resistance, and the service life is greatly shortened. Therefore, it is urgently needed to design a method for repairing and constructing the parking apron to overcome the defects.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a method for repairing and constructing an air park, which effectively solves the problem that the lap joint of a rigid foundation and a flexible foundation is easy to crack by pouring a cement concrete transition plate between a new air park and an old air park; by using the kerosene-proof asphalt concrete on the surface layers of the new and old parking ramps, the oil stain resistance of the asphalt concrete surface layers is obviously improved, and the service life of the parking ramps is greatly prolonged.
In order to achieve the purpose, the invention adopts the technical scheme that:
the method for repairing and constructing the parking apron comprises the following steps:
(1) preparing straight reinforcement construction: setting out the circle center position of a drilled hole on the side surface of the old concrete slab, and drilling a hole parallel to the top surface of the old concrete slab;
(2) and (3) straight reinforcement construction: uniformly filling straight rib glue into a drilled hole, anchoring the straight rib into the drilled hole, fully wrapping the straight rib glue with the straight rib, and binding sleeve ribs used for preventing the straight rib from upwarping on the adjacent straight ribs;
(3) pouring the cement concrete transition plate: lofting the boundary area of the cement concrete transition plate, carrying out template support according to the lofting area, pouring cement concrete into the template, vibrating for compacting, maintaining and removing the template, and carrying out construction of the next working surface;
wherein, the construction sequence of the working surface in the step (3) is as follows: b, paving a first base layer on the cement concrete transition plate and the new concrete plate surface to enable the first base layer and the top surface of the old concrete plate to be in the same horizontal plane; b. paving a second base layer with a certain thickness on the first base layer and the old concrete slab; c. and paving an asphalt concrete surface layer with a certain thickness on the second base layer.
According to the method for repairing the parking apron, the cement concrete transition plate is poured between the new concrete plate and the old concrete plate, so that the problem of rigid and flexible foundation overlapping is effectively solved, the method is suitable for the construction requirements of the parking apron road surface, and meanwhile, the construction requirements of other common road surfaces can be met. The straight ribs are evenly anchored on the side surfaces of the old concrete plates before construction, and the cement concrete transition plates and the old concrete plates are firmly bonded into a whole through the straight ribs; the cement concrete transition plate is used for connecting the new concrete plate and the old concrete plate, and the length of the cement concrete transition plate is along the lap joint length of the whole new parking apron and the old parking apron. When paving, make earlier the cement concrete cross cab apron with the first basic unit of new concrete slab, make first basic unit top surface with old concrete slab top surface is on same horizontal plane, then first basic unit with build the second basic unit on the old concrete slab, stagger the hot seam that will pave with new concrete slab, old concrete slab overlap joint, lead to the seam about preventing to form, because the aircraft that takes off and land on the parking apron every day is more, and weight is great, when the aircraft passes through the cement concrete cross the cab apron, straight muscle has the process of upwarp, from mechanical angle and safety angle analysis consideration, ties up the cover muscle on adjacent straight muscle in the work progress, the cover muscle can be well with straight muscle is fixed in the cement concrete, the concrete cross the cab apron and bear under the great load condition, the cover muscle can provide down, makes straight muscle keep the original state and upwarp, the damage to the whole structure of the cement concrete transition plate is avoided, and the crack at the lap joint of the new concrete plate and the old concrete plate is avoided. The strength and the durability of the cement concrete transition plate are improved. Finally, the formation of reflection cracks is successfully prevented, and the quality of each base layer is fundamentally protected.
The thickness ratio of the asphalt concrete surface to the second base layer is 0.5-0.8: 0.9-1.2.
The second base layer is a structural layer of the new and old air park, the asphalt concrete surface layer is a working layer and a protective layer of the whole new and old air park, the angles of comprehensive cost, the service life of the air park, mechanics and the like are set out, and when the thickness ratio of the kerosene-proof asphalt concrete surface to the second base layer is 0.5-0.8: 0.9-1.2, the normal operation of the airplane on the air park can be ensured, the longer service life can be ensured, and the cost is reduced.
The distance ratio of the straight ribs to the top surface of the old concrete slab, to the top surface of the new concrete slab and to the adjacent straight ribs is 3-4: 0.8-1.2: 9-10.
The straight reinforcement is anchored in the old concrete plate, and then the cement concrete transition plate is poured, so that the straight reinforcement is anchored in the cement concrete transition plate, and the new concrete plate and the old concrete plate can form a whole through the structure, thereby avoiding cracks; and when the distance ratio of the straight rib to the top surface of the old concrete plate, the distance from the top surface of the new concrete plate and the distance from the straight rib to the adjacent straight rib is 3-4: 0.8-1.2: 9-10, the anchoring effect is better. Preferably, when the distance ratio of the straight rib to the top surface of the old concrete plate, the top surface of the new concrete plate and the adjacent straight rib is 3:1:10, the straight rib can play a better reinforcing role in the transition plate of the old concrete plate and the cement layer.
The asphalt concrete surface layer is a kerosene-proof asphalt concrete surface layer made of asphalt concrete modified by a kerosene-proof modifier. The parking apron is the place where the kerosene leakage of the airplane is most serious, the kerosene leakage resistant asphalt concrete is adopted for flexible reinforcement, the problem that the strength of the parking apron is lost due to the kerosene leakage can be well solved, and support can be provided for safe sliding and parking of the airplane.
The anti-kerosene modifier is a compound which takes-Si-O-Si-as a molecular main chain and is connected with alkyl or alkoxy on a silicon atom, preferably one or more of methyl triethoxysilane, ethyl orthosilicate and dimethyl diethoxysilane, and more preferably is formed by mixing the methyl triethoxysilane and the ethyl orthosilicate according to the weight ratio of 2-4: 4-6: 2-3.
The kerosene-proof asphalt concrete is obtained by modifying asphalt concrete through the kerosene-proof modifier, the kerosene-proof asphalt concrete is used on the whole new and old parking apron surface layer, the kerosene corrosion resistance of the parking apron can be obviously improved, the kerosene-proof modifier is a compound which takes Si-O-Si-as a molecular main chain and is connected with alkyl or alkoxy on a silicon atom, and the compound is stable to heat and chemical reagents and has outstanding aging resistance and corrosion resistance.
The first base course and the second base course are asphalt macadam base courses, and the porosity is 10% -18%.
The asphalt macadam base layer is large in coarse aggregate proportion and small in fine aggregate content, the coarse aggregates are mutually interlocked to form a framework, the embedding and extruding capacity is strong, the internal friction angle of the structure is large, and large load can be borne. Meanwhile, the asphalt macadam is adopted as the pavement base course, so that the pavement surface is smooth and seamless, the vibration of the travelling crane is small, the noise is low, the open traffic is fast, the maintenance is simple and convenient in the construction process, and the like; and paving a first base layer on the cement concrete transition plate and the new concrete plate to enable the first base layer and the top surface of the old concrete plate to be positioned on the same horizontal plane, and paving a second base layer on the first base layer and the surface of the old concrete plate to enable the new parking apron and the old parking apron to be integrated.
Compared with the prior art, the invention has the beneficial effects that:
1. the cement concrete transition plate is built at the lap joint of the new parking apron and the old parking apron, so that the problems of layering, cracking and the like at the lap joint of the rigid foundation and the flexible foundation can be effectively solved, and the lap joint stability of the new parking apron and the old parking apron is improved;
2. according to the invention, the sleeve ribs are tied on the straight ribs, and when the cement concrete transition plate bears a large load, the sleeve ribs provide tension, so that the straight ribs are prevented from upwarping, and the quality of the pavement of the parking apron is protected;
3. the construction method of the invention paves the kerosene-proof asphalt concrete surface layer on the whole new and old parking apron surface layer, the parking apron is the place where the kerosene leakage of the airplane is most serious, and the flexible reinforcement of the kerosene-proof asphalt concrete is adopted, so that the problem of strength loss of the parking apron caused by the kerosene leakage can be well solved, and the safe sliding and parking of the airplane can be supported;
4. the method for repairing and constructing the parking apron can be used for continuously constructing without navigation, can meet the construction requirements of high-grade pavements, and is suitable for the construction requirements of other pavements.
Drawings
Fig. 1 is a flow chart of a method for repairing and constructing an apron according to the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, a method for repairing and constructing an apron is characterized by comprising the following steps:
(1) preparing straight reinforcement construction: setting out the circle center position of a drilled hole on the side surface of the old concrete slab, and drilling a hole parallel to the top surface of the old concrete slab;
(2) and (3) straight reinforcement construction: uniformly filling the straight rib glue into a drilled hole, anchoring the straight rib into the drilled hole, fully wrapping the straight rib glue with the straight rib, and binding sleeve ribs for preventing the straight rib from upwarping on the adjacent straight ribs;
(3) pouring the cement concrete transition plate: lofting the boundary area of the cement concrete transition plate, carrying out template support according to the lofting area, pouring cement concrete into the template, vibrating for compacting, maintaining and removing the template, and carrying out construction of the next working surface;
wherein, the construction sequence of the working surface in the step (3) is as follows: b, paving a first base layer on the cement concrete transition plate and the new concrete plate surface to enable the first base layer and the top surface of the old concrete plate to be in the same horizontal plane; b. paving a second base layer with a certain thickness on the first base layer and the old concrete slab; c. and paving an asphalt concrete surface layer with a certain thickness on the second base layer.
The thickness of the asphalt concrete surface layer is 70mm, and the thickness of the second base layer is 90 mm;
the distance between the straight ribs and the top surface of the old concrete plate is 140mm, the distance between the straight ribs and the top surface of the new concrete plate is 40mm, and the distance between the adjacent straight ribs is 400 mm;
the asphalt concrete surface layer is a kerosene-proof asphalt concrete surface layer prepared from asphalt concrete modified by a modifier of methyl triethoxysilane, ethyl orthosilicate and dimethyl diethoxysilane in a weight ratio of 2:2: 1.
The first base course and the second base course are asphalt macadam base courses, and the void ratio is 15% -18%.
Example 2
The embodiment provides a method for repairing and constructing an apron, which is different from the method in embodiment 1 in that:
the thickness of the asphalt concrete surface layer is 80mm, and the thickness of the second base layer is 120 mm;
the distance between the straight ribs and the top surface of the old concrete plate is 120mm, the distance between the straight ribs and the top surface of the new concrete plate is 40mm, and the distance between every two adjacent straight ribs is 360 mm;
the asphalt concrete surface layer is a kerosene-proof asphalt concrete surface layer made of asphalt concrete modified by methyl triethoxysilane.
The first base course and the second base course are asphalt macadam base courses, and the void ratio is 10% -15%.
Example 3
This example provides a method for repairing an apron, which is different from that of example 1 in that the asphalt concrete surface layer is not modified by the kerosene-resistant modifier.
Example 4
The embodiment provides a method for repairing and constructing an apron, which is different from the method in embodiment 1 in that:
the straight ribs are 100mm away from the top surface of the old concrete slab, 30mm away from the top surface of the new concrete slab, and the distance between the straight ribs is 600 mm.
Example 5
The embodiment provides a method for repairing and constructing an apron, which is different from the method in embodiment 1 in that:
the thickness of the asphalt concrete surface course is 40mm, and the thickness of the second base course is 80 mm.
Comparative example 1
Compared with the embodiment 1, the difference of the method is that the straight ribs are not anchored between the cement concrete transition plate and the old air park in the construction process.
Comparative example 2
The comparative example provides a method for repairing and constructing an apron, which is different from the method in example 1 in that sleeve ribs are not tied on adjacent straight ribs.
Comparative example 3
The comparative example provides a method for repairing and constructing an apron, which is different from the method in example 1 in that an asphalt concrete surface layer is paved on a base layer which is not subjected to the second time.
According to technical Specification for road asphalt pavement construction (JTG F40-2004), the pavement performance of the asphalt mixture is tested, wherein 60mL of kerosene is coated on the surfaces of the rutting test pieces in examples 1, 2 and 3, 5mL of kerosene is coated on the surfaces of the Marshall test pieces, the rutting test and the Marshall stability test are carried out on the test pieces after the test pieces are placed at room temperature for 2d and 7d, and the test results are shown in Table 1:
table 1: experimental comparison data
As can be seen from the comparison of the detection results of the examples and the comparative example, the parking apron has better anti-rutting capability and stability by adjusting the parameters of each construction step within the range of the construction method. The comprehensive performance of the embodiment 1 is optimal, the early anti-rutting capability and the stability, and the anti-rutting capability and the stability after 7d are higher than the requirements of parking apron construction, and the embodiment 1 is different from the embodiment 2 in that the anti-kerosene modifier in the embodiment 1 is a mixture of methyltriethoxysilane, ethyl orthosilicate and dimethyldiethoxysilane according to the weight ratio of 2:2:1, and the anti-kerosene modifier in the embodiment 2 is methyltriethoxysilane, and as can be seen from the table 1, the embodiment 1 and the embodiment 2 have stronger anti-kerosene capability, but the anti-kerosene modifier acting together with the three can exert stronger anti-kerosene effect than the dimethyldiethoxysilane when used alone; the difference between the example 3 and the examples 1 and 2 is that the asphalt concrete surface layer in the example 3 does not use the kerosene-proof modifier, and the test pieces have stronger anti-rutting capability and stability under the condition of not being corroded by kerosene, and the anti-rutting capability and stability of the test pieces in the example 3 are obviously reduced compared with the examples 1 and 2 after being corroded by kerosene. The comparative example 1 is different from the example 1 in that no straight rib is used for reinforcement, and as can be seen from table 1, under the condition that no straight rib is used for reinforcement, the track resistance and the stability of a test piece are obviously reduced, and faults and cracks are easy to occur; the difference between the comparative example 2 and the example 1 is that sleeve ribs are not used, the performance is improved to a certain extent compared with the comparative example 1, and the requirement of the parking apron pavement cannot be met; the difference between the comparative example 3 and the example 1 is that the asphalt concrete surface layer is not paved, the asphalt concrete surface layer is used as both the working layer and the protective layer of the parking apron to play an important role, and under the condition that the asphalt concrete surface layer is not paved, the structural layer can not be protected, so that the anti-rutting capability and the stability of the road surface are obviously reduced, and the working performance of the parking apron can not be met.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The method for repairing and constructing the parking apron is characterized by comprising the following steps of:
(1) preparing straight reinforcement construction: setting out the circle center position of a drilled hole on the side surface of the old concrete slab, and drilling a hole parallel to the top surface of the old concrete slab;
(2) and (3) straight reinforcement construction: uniformly filling straight rib glue into a drilled hole, anchoring the straight rib into the drilled hole, fully wrapping the straight rib glue with the straight rib, and binding sleeve ribs used for preventing the straight rib from upwarping on the adjacent straight ribs;
(3) pouring the cement concrete transition plate: lofting the boundary area of the cement concrete transition plate, carrying out template support according to the lofting area, pouring cement concrete into the template, vibrating for compacting, maintaining and removing the template, and carrying out construction of the next working surface;
wherein, the construction sequence of the working surface in the step (3) is as follows: b, paving a first base layer on the cement concrete transition plate and the new concrete plate surface to enable the first base layer and the top surface of the old concrete plate to be in the same horizontal plane; b. paving a second base layer with a certain thickness on the first base layer and the old concrete slab; c. paving an asphalt concrete surface layer with a certain thickness on the second base layer; the thickness ratio of the asphalt concrete surface to the second base layer is 0.5-0.8: 0.9-1.2; the distance ratio of the straight ribs to the top surface of the old concrete slab, to the top surface of the new concrete slab and to the adjacent straight ribs is 3-4: 0.8-1.2: 9-10.
2. The method as claimed in claim 1, wherein the asphalt concrete surface layer is a kerosene-proof asphalt concrete surface layer made of asphalt concrete modified by a kerosene-proof modifier.
3. The apron repairing construction method according to claim 2, wherein the kerosene-preventing modifier is a compound having a molecular main chain of-Si-O-Si-and a silicon atom to which an alkyl group or an alkoxy group is bonded.
4. The method for repairing an apron as claimed in claim 3, wherein the kerosene-preventing modifier is a mixture of methyltriethoxysilane, tetraethoxysilane and dimethyldiethoxysilane in a weight ratio of 2-4: 4-6: 2-3.
5. The method as claimed in claim 1, wherein the first and second base courses are asphalt macadam base courses and have a porosity of 10-18%.
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| CN201711385216.4A CN109944131B (en) | 2017-12-20 | 2017-12-20 | Parking apron repairing construction method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101691736A (en) * | 2009-09-23 | 2010-04-07 | 中交二公局第六工程有限公司 | Construction method for reconstructing old concrete pavement by paving asphalt-concrete surface layer |
| CN103422410A (en) * | 2013-08-28 | 2013-12-04 | 杭州中港建设工程有限公司 | Construction method for additionally laying concrete precast slabs on airport pavement without suspending aviation service |
| CN106480799A (en) * | 2016-10-19 | 2017-03-08 | 长沙理工大学 | Pavement mosaic method and structure suitable for Old cement concrete reorganization and expansion |
| CN107165022A (en) * | 2017-06-21 | 2017-09-15 | 杭州江润科技有限公司 | A kind of big thickness subbase construction method of High-cold regions highway widening reinforcement |
| CN107227667A (en) * | 2017-06-19 | 2017-10-03 | 四川交投建设工程股份有限公司 | A kind of Asphalt Pavement with Flexible Base splices Widening Construction method |
-
2017
- 2017-12-20 CN CN201711385216.4A patent/CN109944131B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101691736A (en) * | 2009-09-23 | 2010-04-07 | 中交二公局第六工程有限公司 | Construction method for reconstructing old concrete pavement by paving asphalt-concrete surface layer |
| CN103422410A (en) * | 2013-08-28 | 2013-12-04 | 杭州中港建设工程有限公司 | Construction method for additionally laying concrete precast slabs on airport pavement without suspending aviation service |
| CN106480799A (en) * | 2016-10-19 | 2017-03-08 | 长沙理工大学 | Pavement mosaic method and structure suitable for Old cement concrete reorganization and expansion |
| CN107227667A (en) * | 2017-06-19 | 2017-10-03 | 四川交投建设工程股份有限公司 | A kind of Asphalt Pavement with Flexible Base splices Widening Construction method |
| CN107165022A (en) * | 2017-06-21 | 2017-09-15 | 杭州江润科技有限公司 | A kind of big thickness subbase construction method of High-cold regions highway widening reinforcement |
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