CN218478979U - Seamless airport pavement structure and seamless reconstruction structure of existing airport pavement - Google Patents
Seamless airport pavement structure and seamless reconstruction structure of existing airport pavement Download PDFInfo
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- CN218478979U CN218478979U CN202221674277.9U CN202221674277U CN218478979U CN 218478979 U CN218478979 U CN 218478979U CN 202221674277 U CN202221674277 U CN 202221674277U CN 218478979 U CN218478979 U CN 218478979U
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Abstract
The utility model discloses a seamless airport pavement structure and a seamless reconstruction structure of the existing airport pavement, which comprises a roadbed, a base layer and a seamless pavement slab which are laid in sequence from bottom to top; the seamless pavement slab comprises a plurality of newly-built cement concrete slabs; a plurality of newly-built cement concrete slabs are horizontally laid in blocks, and splicing seams are arranged between two adjacent newly-built cement concrete slabs; the splicing seam is divided into an upper splicing groove section and a lower splicing seam section from top to bottom; a high-ductility transition belt is arranged in the upper splicing groove section and is formed by pouring high-ductility concrete; a joint filling material belt is arranged in the lower splicing seam section; a horizontal pull rod is also arranged in the lower splicing seam section; the utility model discloses a set up high ductility transition area on adjacent cement concrete slab concatenation seam top, form seamless cement concrete slab, eliminate the plate top seam, keep the integrality and the intensity of airport pavement structure, prevent all kinds of diseases because of the seam produces, and then strengthen the durability of pavement.
Description
Technical Field
The utility model belongs to the technical field of airport pavement engineering, in particular to seamless airport pavement structure and seamless transformation structure of existing airport pavement.
Background
The cement concrete pavement has the advantages of high strength, low cost, low energy consumption and the like; currently, approximately 90% of airports utilize cement concrete pavements; because the cement concrete will produce shrinkage stress and temperature stress in the course of setting and hardening and under the condition of temperature change, need to set up the crisscross joint, relieve the influence of shrinkage stress and temperature stress; the Chinese patent application 'airport pavement' (with the application number of 201120451415.2) discloses that the upper surface of a caulking body is lower than the surface of a cement concrete pavement, and a chamfering process is adopted to eliminate stress concentration at a joint position; with the increasing use frequency of airport pavement, the pavement structure type has the condition of asphalt capping on the basis of the original cement concrete pavement; wherein, the Chinese patent application 'an airport pavement structure' (application number 202221903705.0) discloses that by arranging a transition section at the joint of a rigid pavement and a flexible pavement, the defects caused by uneven settlement of different pavement structures can be effectively improved, and by adding a crack pouring process at the joint of two pavements, rainwater is prevented from entering a structural layer, and the defects of mud pumping, void removal, plate breakage and the like caused by rainwater entering are prevented; the joints and the transition layers are often the weakest parts of the pavement structure, and the joint breakage phenomenon is easy to occur due to the peeling, extrusion and aging of the joint filling material; if rainwater permeates from the joint, phenomena of mud pumping, bottom plate hollowing, slab staggering and the like can occur, even uneven frost heaving can occur in winter, and further deformation and cracking of the cement concrete slab are caused; if the extension and expansion of the plate are blocked due to the entry of the miscellaneous soil or the broken stones into the joint, the arching phenomenon can occur; all of the above seriously affect the durability and usability of the airport pavement and endanger the operational safety of the airplane. Therefore, how to solve various diseases caused by cement concrete slab joints is an urgent problem to be solved in airport pavement design.
SUMMERY OF THE UTILITY MODEL
To the technical problem who exists among the prior art, the utility model provides a seamless airport pavement structure and seamless transformation structure of existing airport pavement to solve because all kinds of diseases that present cement concrete slab seam arouse, seriously influence the technical problem of durability and service property of airport pavement.
In order to achieve the purpose, the utility model adopts the technical proposal that:
the utility model provides a seamless airport pavement structure, which is applied to the new airport pavement; the seamless airport pavement structure comprises a roadbed, a base layer and a seamless pavement slab which are sequentially paved from bottom to top; the seamless pavement slab comprises a plurality of newly-built cement concrete slabs; a plurality of newly-built cement concrete slabs are horizontally paved in a partitioning manner, and splicing seams are arranged between two adjacent newly-built cement concrete slabs;
the splicing seam is divided into an upper splicing groove section and a lower splicing seam section from top to bottom; a high-ductility transition zone is arranged in the upper splicing groove section, and the high-ductility transition zone is formed by pouring high-ductility concrete; a joint filling material belt is arranged in the lower splicing seam section; and a horizontal pull rod is further arranged in the lower splicing seam section, one end of the horizontal pull rod is fixed with one newly-built cement concrete slab, and the other end of the horizontal pull rod is fixed with the other newly-built cement concrete slab.
Furthermore, the depth of the upper splicing groove section is half of the depth of the splicing seam, and the width of the upper splicing groove section is 40-50cm.
Further, an anchoring steel bar is arranged between the high-ductility transition zone and the newly-built cement concrete slab; one end of the anchoring steel bar is anchored and fixed in the high-ductility transition zone, and the other end of the anchoring steel bar is anchored and fixed in the newly-built cement concrete slab; wherein the distance between the center line of the anchoring steel bar and the top surface of the high-ductility transition zone is half of the thickness of the high-ductility transition zone.
Further, the length of the anchoring steel bar is 10-20cm, and the diameter of the anchoring steel bar is 1.5-2.0cm; the anchoring steel bars are arranged at intervals along the length direction of the high-ductility transition zone, and the distance between every two adjacent anchoring steel bars is 20-30cm.
Furthermore, the depth of the lower splicing seam section is half of the depth of the splicing seam, and the width of the lower splicing seam section is 3-8mm; the joint filling material belt is formed by filling joint filling materials, and the joint filling materials are filled in the lower splicing joint sections; wherein the joint sealing material is polyurethane joint sealing material.
Further, the length of the horizontal pull rod is 700-800mm, and the diameter of the horizontal pull rod is 14-16mm; the horizontal pull rods are arranged at intervals along the length direction of the lower splicing seam section, and the distance between every two adjacent horizontal pull rods is 400-600mm.
Further, the distance between the central line of the horizontal pull rod and the bottom surface of the newly-built cement concrete slab is half of the depth of the lower splicing seam section.
The utility model also provides a seamless reconstruction structure of the existing airport pavement, which is characterized in that the seamless reconstruction structure is applied to the existing airport pavement panel; the seamless reconstruction structure of the existing airport pavement comprises a high-ductility transition zone;
splicing seams are arranged between adjacent existing cement concrete slabs in the existing airport pavement panel; the splicing seam is divided into an upper splicing groove section and a lower splicing seam section from top to bottom; the high-ductility transition belt is arranged in the upper splicing groove section and is formed by pouring high-ductility concrete; the lower splicing seam section is an existing seam between adjacent existing cement concrete slabs; wherein, a joint filling material belt is arranged in the existing joint.
Furthermore, the depth of the upper splicing groove section is half of the depth of the splicing seam, and the width of the upper splicing seam groove section is 40-50cm; and a cement mortar layer is arranged between the high-ductility transition zone and the inner wall of the upper splicing groove section.
Furthermore, the joint filling material belt is formed by filling joint filling materials; wherein the joint sealing material is polyurethane joint sealing material.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a seamless airport pavement structure and seamless reconstruction structure of the existing airport pavement, which form the seamless cement concrete slabs by arranging a high-ductility transition belt at the top ends of splicing seams of adjacent cement concrete slabs, eliminate slab top seams and keep the integrity and strength of the airport pavement structure; meanwhile, a lower splicing seam section is arranged below the high-ductility transition zone, so that the thermal shrinkage stress and the drying shrinkage stress in the cement concrete slab can be effectively relieved, the deformation in the cement concrete slab caused by thermal shrinkage and drying shrinkage is induced into the lower splicing seam section, and the cracks generated by the lower joint are dispersed into countless microcracks by using the high-ductility concrete, so that the concentrated cracks formed on the surface of the cement concrete slab are avoided; the top of the pavement slab is seamless, various diseases caused by seams are effectively prevented, the durability of the pavement is enhanced, and the service performance of the airport pavement is improved.
Furthermore, through set up the anchor reinforcing bar between high ductility transition area and cement concrete slab, effectively improved the cohesive strength between high ductility transition area and the cement concrete slab, avoided appearing the fracture phenomenon between high ductility transition area and cement concrete slab.
Furthermore, through set up the cement mortar layer between the inner wall at high ductility transition area and last concatenation groove section, effectively strengthened the adhesive property between high ductility transition area and the existing cement concrete slab, avoid appearing the fracture phenomenon between high ductility transition area and cement concrete slab.
Drawings
Fig. 1 is a vertical sectional view of a pavement structure in example 1;
FIG. 2 is a plan sectional view of a tread structure in example 1;
fig. 3 is a vertical sectional view of a seamless reconstruction structure of an existing airfield pavement in embodiment 2;
fig. 4 is a plan sectional view of the existing airport pavement seamless remodeling structure of example 2.
The construction method comprises the following steps of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, a horizontal pull rod and 11, wherein the foundation is a roadbed, the base layer is 2, the jointless pavement slab is 3, the existing airport pavement slab is 4, the upper splicing groove section is 5, the lower splicing seam section is 6, the high-ductility transition belt is 7, the anchoring steel bars are 8, the gap filling material belt is 9, and the horizontal pull rod is 11; 12 newly-built cement concrete slab, 13 existing cement concrete slab.
Detailed Description
In order to make the technical problem solved by the present invention, technical solution and beneficial effect are more clearly understood, and the following specific embodiments are right for the present invention to proceed further detailed description. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model provides a seamless airport pavement structure, which is applied to the new airport pavement; the seamless airport pavement comprises a roadbed 1, a base layer 2 and a seamless pavement slab 3 which are sequentially paved from bottom to top; the roadbed 1 is laid on a foundation, and the base layer 2 is a cement stabilized macadam base layer; the seamless pavement slab 3 comprises a plurality of newly-built cement concrete slabs 12, a high-ductility transition belt 7, anchoring reinforcing steel bars 8, a joint filling material belt 9 and a horizontal pull rod 10.
A plurality of the newly-built cement concrete slabs 12 are horizontally paved in a blocking manner, and a splicing seam is arranged between two adjacent newly-built cement concrete slabs; the splicing seam is divided into an upper splicing groove section 5 and a lower splicing seam section 6 from top to bottom, a high-ductility transition belt 7 is arranged in the upper splicing groove section 5, and anchoring steel bars 8 are arranged between the high-ductility transition belt 7 and a newly-built cement concrete slab 12; wherein the high-ductility transition zone 7 is formed by pouring high-ductility concrete; a joint filling material belt 9 is arranged in the lower splicing seam section 6; and a horizontal pull rod 10 is also arranged in the lower splicing seam section 6.
In the utility model, the roadbed 1 is formed by rolling soil, and the resilience modulus of the top surface of the roadbed is not lower than 40MPa; the base layer 2 is formed by paving and rolling cement-stabilized macadam, the thickness of the base layer 2 is 30-36cm, the base layer is formed by two layers of paving and rolling, and the thickness of each paving and rolling layer is 15-18cm; the cement concrete slabs are formed by pouring common concrete, the thickness of each concrete slab is 30-40cm, the length is 4-6m, and the width is 4-6m; wherein, the common concrete is formed by mixing Portland cement, water, sand and gravel aggregate according to a designed mixing proportion.
In the utility model, the depth of the upper splicing groove section 5 is half of the depth of the splicing seam, the width of the upper splicing groove section 5 is 40-50cm, namely, the thickness of the high-ductility transition zone 7 is half of the depth of the splicing seam, and the width is 40-50cm; the anchoring steel bar 8 is horizontally arranged between the high-ductility transition zone 7 and the newly-built cement concrete slab 12, one end of the anchoring steel bar 8 is anchored and fixed in the high-ductility transition zone 7, and the other end of the anchoring steel bar 8 is anchored and fixed in the newly-built cement concrete slab 12; the length of the anchoring steel bar 8 is 10-20cm, and the diameter is 1.5-2.0cm; the anchoring steel bars 8 are arranged at intervals along the length direction of the high-ductility transition zone 7, and the distance between every two adjacent anchoring steel bars 8 is 20-30cm; the distance between the center line of the anchoring steel bar 8 and the top surface of the high ductility transition zone 7 is half of the thickness of the high ductility transition zone 7.
In the utility model, the depth of the lower splicing seam section 6 is half of the depth of the splicing seam, and the width of the lower splicing seam section 6 is 3-8mm; the joint filling material belt 9 is formed by filling joint filling materials, and the joint filling materials are filled in the lower splicing joint section 6; wherein the joint sealing material is polyurethane joint sealing material.
In the utility model, the horizontal pull rods 10 are horizontally arranged in the lower splicing seam section 6 at intervals, one end of each horizontal pull rod 10 is fixed with one newly-built cement concrete slab, and the other end of each horizontal pull rod 10 is fixed with the other newly-built cement concrete slab; the length of the horizontal pull rod 10 is 700-800mm, and the diameter of the horizontal pull rod 10 is 14-16mm; the horizontal pull rods 10 are arranged at intervals along the length direction of the lower splicing seam section 6, and the distance between every two adjacent horizontal pull rods 10 is 400-600mm; the distance between the central line of the horizontal pull rod 10 and the bottom surface of the newly-built cement concrete slab 12 is half of the depth of the lower splicing seam section 6.
The utility model also provides a seamless reconstruction structure of the existing airport pavement, which is applied to the existing airport pavement panel 4; the seamless reconstruction structure of the existing airport pavement comprises a high-ductility transition belt 7, a joint filling material belt 9 and a cement mortar layer 11; a splicing seam is arranged between adjacent existing cement concrete slabs 13 in the existing airport pavement panel 4; the splicing seam is divided into an upper splicing groove section 5 and a lower splicing seam section 6 from top to bottom.
The high-ductility transition zone 7 is arranged in the upper splicing groove section 5, and the high-ductility transition zone 7 is formed by pouring high-ductility concrete; the lower splicing seam section 6 is an existing seam between adjacent existing cement concrete slabs 13; wherein, a joint filling material belt 9 is arranged in the existing joint; the depth of the upper splicing groove section 5 is half of the depth of the splicing seam, and the width of the upper splicing seam groove section 5 is 40-50cm; a cement mortar layer 11 is arranged between the high-ductility transition zone 7 and the inner wall of the upper splicing groove section 5; the joint filling material belt 9 is formed by filling joint filling materials; wherein the joint sealing material is polyurethane joint sealing material.
The seamless airport pavement structure and the seamless reconstruction structure of the existing airport pavement can make full use of the excellent bending tensile strength and ductility of the high-ductility concrete and the strong crack control capability by arranging the high-ductility transition zone at the top end of the splicing seam of the adjacent cement concrete slabs so as to lead the high-ductility transition zone to replace the top seam of the traditional cement concrete slab and form the seamless concrete pavement slab; meanwhile, the high-ductility concrete has the strain hardening characteristic under the action of uniaxial tension, cracks at the lower end of the splicing seam can be dispersed into a plurality of microcracks, the widths of the microcracks are ensured to be smaller than 60 mu m, and the strength and the impermeability of the high-ductility concrete are not influenced; the joint filling material belt is arranged at the lower end of the splicing seam of the adjacent cement concrete slabs, and the horizontal pull rod is arranged at the lower end of the splicing seam of the adjacent cement concrete slabs, so that the deformation of the cement concrete slabs caused by temperature shrinkage or drying shrinkage can be induced and absorbed; the crack of the lower splicing joint section can be expanded to a high-ductility transition zone at the upper part, and the formation of concentrated crack on the surface of the cement concrete slab is avoided by utilizing the excellent crack resistance and crack control capability of the high-ductility concrete; therefore, the jointless airport pavement can not only resolve thermal shrinkage stress and dry shrinkage stress in the cement concrete slab, but also eliminate slab-fixed joints; effectively solved cement concrete slab because of the all kinds of diseases that the deblocking produced, promoted the life of airport pavement.
Example 1
Take the structure of the runway surface of a new airport as an example.
As shown in fig. 1-2, this embodiment 1 provides a seamless airport pavement structure, which comprises a roadbed 1, a base layer 2 and a seamless pavement slab 3, which are laid in sequence from top to bottom.
In this embodiment 1, the roadbed 1 is formed by layering and rolling roadbed soil; wherein the resilience modulus of the top surface of the roadbed 1 is not lower than 40MPa; the base layer 2 is formed by paving and rolling cement-stabilized macadam, the thickness of the base layer 2 is 36cm, and the base layer is formed by two layers of paving, rolling and forming; wherein the thickness of each paving and rolling layer is 18cm.
In this embodiment 1, the jointless track panel 3 includes a plurality of newly built cement concrete panels 12, and the plurality of newly built cement concrete panels 12 are horizontally laid in blocks; wherein, the thickness of each newly-built cement concrete slab 12 is 36cm, the width is 5m, and the length is 5m; the newly-built cement concrete slab 12 is formed by pouring common concrete, wherein the common concrete is formed by pouring portland cement, water, sand and broken stone aggregate according to the mass ratio of 1.4:1:3.6:7 mixing to obtain the composition; the water-cement ratio of the common concrete is 0.41.
And a splicing seam is arranged between two adjacent newly-built cement concrete slabs and is divided into an upper splicing groove section 5 and a lower splicing seam section 6 from top to bottom.
In this embodiment 1, the upper splice groove section 5 has a depth of 18cm and a width of 40cm; a high-ductility transition zone 7 is arranged in the upper splicing groove section 5, and the size of the high-ductility transition zone 7 is matched with the internal size of the upper splicing groove section 5; the high-ductility transition zone 5 is formed by pouring high-ductility concrete; the high-ductility concrete is prepared from portland cement, fly ash, quartz sand, water, fiber, a water reducing agent and a retarder according to a mass ratio of 70:80:66:36:4:1:5 by mixing.
An anchoring steel bar 8 is arranged between the high-ductility transition zone 5 and the newly-built cement concrete slab 12; one end of the anchoring steel bar 8 is anchored and fixed in the high-ductility transition zone 7, and the other end of the anchoring steel bar 8 is anchored and fixed in the newly-built cement concrete slab 12; wherein the anchoring length of the anchoring steel bar 8 in the high ductility transition zone 7 is the same as the anchoring length of the anchoring steel bar 8 in the newly built cement concrete slab 12; the installation height of the anchoring steel bar 8 is positioned in the middle of the upper splicing groove section 5 in the height direction; the length of the anchoring steel bar 8 is 20cm, and the diameter of the anchoring steel bar is 1.5cm; the anchoring reinforcing steel bars 8 are arranged at intervals along the length direction of the high-ductility transition zone 7, and the distance between every two adjacent anchoring reinforcing steel bars 8 is 30cm.
In this embodiment 1, the width of the lower splice section 6 is 3-8mm; a joint filling material belt 9 is arranged in the lower splicing seam section 6; the joint filling material belt 9 is formed by filling joint filling materials; wherein the joint filling material is polyurethane joint filling material; a horizontal pull rod 10 is horizontally arranged in the lower splicing seam section 6, one end of the horizontal pull rod 10 is fixed with one newly-built cement concrete slab, and the other end of the horizontal pull rod 10 is fixed with the other newly-built cement concrete slab; wherein, the fixed length of the horizontal pull rod 10 in two adjacent newly-built cement concrete slabs is the same; the length of the horizontal pull rod 10 is 700mm, and the diameter of the horizontal pull rod is 16mm; the pull rods 10 are arranged at intervals along the length direction of the lower splicing seam section 6, and the distance between every two adjacent horizontal pull rods 10 is 400mm; the distance between the central line of the pull rod 10 and the bottom surface of the newly-built cement concrete slab is 9cm.
Example 2
Take a seamless reconstruction process for an existing airport pavement as an example.
As shown in fig. 3 to 4, the present embodiment 2 provides a seamless reconstruction structure of an existing airport pavement, which is used in the existing airport pavement; the existing airport pavement comprises a roadbed 1, a base layer 2 and an existing airport pavement panel 4 which are sequentially paved from bottom to top; the existing airport pavement panel 4 comprises a plurality of existing cement concrete slabs 13, and the existing cement concrete slabs 13 are horizontally paved in blocks; wherein the thickness of the existing cement concrete slab 13 is 36cm.
The seamless reconstruction structure of the existing airport pavement described in this embodiment 2 includes a high-ductility transition belt 7, a joint filling material belt 9, and a cement mortar layer 11; a splicing seam is arranged between the adjacent existing cement concrete slabs 13; the splicing seam is divided into an upper splicing groove section 5 and a lower splicing seam section 6 from top to bottom; the upper splicing groove section 5 is of a groove structure formed in a splicing seam between two adjacent existing cement concrete slabs 13, the width of the upper splicing groove section 5 is 50cm, and the depth of the upper splicing groove section 5 is 18cm.
In this embodiment 2, the high-ductility transition zone 7 is disposed in the upper splicing groove section 5, and the high-ductility transition zone 7 is formed by pouring high-ductility concrete; the high-ductility concrete is prepared from portland cement, fly ash, quartz sand, water, fiber, a water reducing agent and a retarder according to a mass ratio of 70:80:66:36:4:1:5 by mixing; and a cement mortar layer 11 is arranged between the high-ductility transition zone 7 and the inner wall of the upper splicing groove section 5.
The lower splicing seam section 6 is an existing seam between adjacent existing cement concrete slabs 13; wherein, a joint filling material belt 9 is arranged in the existing joint.
And (3) transformation construction process:
a first 25cm wide groove is cut into the side wall of an existing concrete slab on one side of the splice seam and a second 25cm wide groove is cut into the side wall of an existing concrete slab on the other side of the splice seam, the first and second grooves being spliced to form the upper splice channel section 5.
After cutting, cleaning impurities in the existing joints between the adjacent existing cement concrete slabs 12, and determining whether to replace the joint filling materials according to the using state of the joint filling materials in the existing joints; if the joint needs to be replaced, filling materials are filled in the existing abutted seams to form the joint filling material belt 9.
Then, cement mortar is coated at the bottom and the periphery of the upper splicing groove section 5 to form a cement mortar layer 11; and then pouring high-ductility concrete in the upper splicing groove section 5 to form a high-ductility transition zone 7.
In the embodiment 2, only the high-ductility transition belt is arranged at the top end of the existing seam, and the lower structure keeps the original structure of the existing pavement structure unchanged, so that the seamless airport pavement is realized, and the influence of the seam on the pavement structure is eliminated; simple structure, the construction degree of difficulty is little, has effectively prolonged the life of pavement structure.
Seamless airport pavement structure and seamless transformation structure of existing airport pavement, through adopting the fashioned high ductility transition zone of high ductility concrete placement, realized seamless airport pavement, eliminated because of the influence of all kinds of diseases that the seam causes to the pavement structure, reduced the fracture of pavement, realized the integrality of pavement structure, improved pavement intensity and durability, prolonged pavement life.
In the utility model, a high-ductility transition belt is arranged at the top end of the splicing seam of the concrete pavement slab to form a seamless concrete slab, eliminate slab top seams and keep the integrity and strength of the pavement structure; meanwhile, the joint structure under the high-ductility transition belt can relieve the dry shrinkage stress and the temperature shrinkage stress in the concrete slab; dispersing the cracks generated at the lower part joints into countless micro cracks by using high-ductility concrete; the concrete pavement top is seamless, various diseases caused by seams can be effectively prevented, the durability of the pavement is further enhanced, and the service performance of the airport pavement is improved.
The above embodiment is only one of the embodiments that can realize the technical solution of the present invention, and the scope of the present invention is not limited only by the embodiment, but also includes any variations, substitutions and other embodiments that can be easily conceived by those skilled in the art within the technical scope of the present invention.
Claims (10)
1. A jointless airfield pavement structure is characterized in that the jointless airfield pavement structure is applied to a newly-built airfield pavement; the seamless airport pavement structure comprises a roadbed (1), a base layer (2) and a seamless pavement slab (3) which are sequentially paved from bottom to top; the seamless pavement slab (3) comprises a plurality of newly-built cement concrete slabs (12); a plurality of newly-built cement concrete slabs (12) are horizontally paved in a partitioning manner, and splicing seams are arranged between two adjacent newly-built cement concrete slabs;
the splicing seam is divided into an upper splicing groove section (5) and a lower splicing seam section (6) from top to bottom; a high-ductility transition belt (7) is arranged in the upper splicing groove section (5), and the high-ductility transition belt (7) is formed by pouring high-ductility concrete; a joint filling material belt (9) is arranged in the lower splicing seam section (6); and a horizontal pull rod (10) is further arranged in the lower splicing seam section (6), one end of the horizontal pull rod (10) is fixed with one of the newly-built cement concrete slabs, and the other end of the horizontal pull rod (10) is fixed with the other newly-built cement concrete slab.
2. A jointless airfield pavement structure according to claim 1, wherein the depth of the upper splice groove section (5) is half of the splice seam depth and the width of the upper splice groove section (5) is 40-50cm.
3. A jointless airport pavement structure according to claim 1, wherein anchoring bars (8) are provided between the high ductility transition zone (7) and the newly built cement concrete slab (12); one end of the anchoring steel bar (8) is anchored and fixed in the high-ductility transition zone (7), and the other end of the anchoring steel bar (8) is anchored and fixed in the newly-built cement concrete slab (12); wherein the distance between the center line of the anchoring steel bar (8) and the top surface of the high-ductility transition zone (7) is half of the thickness of the high-ductility transition zone (7).
4. A jointless airfield pavement structure according to claim 3 wherein the anchoring reinforcement (8) has a length of 10-20cm and a diameter of 1.5-2.0cm; the anchoring steel bars (8) are arranged at intervals along the length direction of the high-ductility transition zone (7), and the distance between every two adjacent anchoring steel bars (8) is 20-30cm.
5. A seamless airfield pavement structure according to claim 1, wherein the depth of the lower splice seam section (6) is half of the splice seam depth, the width of the lower splice seam section (6) is 3-8mm; the joint filling material belt (9) is formed by filling joint filling materials, and the joint filling materials are filled in the lower splicing joint section (6); wherein the joint sealing material is polyurethane joint sealing material.
6. A jointless airfield pavement structure according to claim 1 wherein the horizontal tie bar (10) has a length of 700-800mm and a diameter of 14-16mm; the horizontal pull rods (10) are arranged at intervals along the length direction of the lower splicing seam section (6), and the distance between every two adjacent horizontal pull rods (10) is 400-600mm.
7. A jointless airport pavement structure according to claim 1 wherein the distance between the centerline of the horizontal tie bar (10) and the bottom surface of the newly built concrete slab is half the depth of the lower splice section (6).
8. A seamless reconstruction structure of an existing airport pavement is characterized by being applied to an existing airport pavement panel (4); the seamless reconstruction structure of the existing airport pavement comprises a high-ductility transition zone (7);
splicing seams are arranged between adjacent existing cement concrete slabs (13) in the existing airport pavement panel (4); the splicing seam is divided into an upper splicing groove section (5) and a lower splicing seam section (6) from top to bottom; the high-ductility transition zone (7) is arranged in the upper splicing groove section (5), and the high-ductility transition zone (7) is formed by pouring high-ductility concrete; the lower splicing seam section (6) is an existing seam between adjacent existing cement concrete slabs (13); wherein, a joint filling material belt (9) is arranged in the existing joint.
9. An existing airport pavement seamless retrofit structure according to claim 8, wherein the depth of said upper splice groove section (5) is half the depth of said splice seam, the width of said upper splice groove section (5) is 40-50cm; and a cement mortar layer (11) is arranged between the high-ductility transition zone (7) and the inner wall of the upper splicing groove section (5).
10. An existing airport pavement seamless reconstruction structure according to claim 8, wherein, the joint compound material belt (9) is formed by joint compound filling; wherein the joint sealing material is polyurethane joint sealing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221674277.9U CN218478979U (en) | 2022-06-30 | 2022-06-30 | Seamless airport pavement structure and seamless reconstruction structure of existing airport pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202221674277.9U CN218478979U (en) | 2022-06-30 | 2022-06-30 | Seamless airport pavement structure and seamless reconstruction structure of existing airport pavement |
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| CN218478979U true CN218478979U (en) | 2023-02-14 |
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| CN202221674277.9U Active CN218478979U (en) | 2022-06-30 | 2022-06-30 | Seamless airport pavement structure and seamless reconstruction structure of existing airport pavement |
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