Grouting and leveling structure for rapid plate replacement of airport pavement

Abstract

The utility model provides a grouting leveling structure for quick plate replacement of an airport pavement, which comprises a plurality of sleeves with internal threads fixed in a precast concrete plate, the sleeves are communicated with the upper space and the lower space of the precast concrete plate, support short sections are arranged in the sleeves, and the support short sections are communicated with the upper space and the lower space of the precast concrete plate. An external thread is arranged on the peripheral wall of the supporting short section, the external thread on the supporting short section is matched with the internal thread of the sleeve so that the supporting short section can move up and down in the sleeve, the lower end of the supporting short section is arranged to be in a cone shape protruding downwards, and a grouting channel is formed in the supporting short section. An inlet of the grouting channel is formed in the top face of the supporting short section, and an outlet of the grouting channel is formed in the conical face of the lower end of the supporting short section. And after the precast concrete slab is leveled, the grouting channel is still kept smooth and is not influenced by leveling operation.

Description

Technical Field

[0001] The utility model relates to the technical field of airport pavement repair, in particular to a grouting leveling structure for rapid plate replacement on an airport pavement. Background Art

[0002] During the rapid replacement of the airport pavement, the newly replaced precast concrete slab needs to be leveled in the foundation pit so that the precast concrete slab meets the elevation requirements. After leveling, quick-setting cement slurry is injected between the foundation pit and the precast concrete slab. The existing leveling device includes: an internally threaded outer tube fixed on the precast concrete slab, the internally threaded outer tube is connected to an externally threaded inner tube, and the externally threaded inner tube can move up and down along the axis of the internally threaded outer tube. A notch is provided at the upper end of the internally threaded outer tube for facilitating the application of force to the internally threaded outer tube and screwing it. A plurality of leveling devices are provided on the precast concrete slab, and the leveling of the precast concrete slab is achieved by screwing the internally threaded tube. After the leveling is completed, the leveling device is also used as a grouting port, and the quick-setting cement slurry is injected into the gap through the externally threaded inner tube. The slurry needs to emerge from the seam between the precast slab and the adjacent slab, so that the precast concrete slab is tightly connected to the foundation pit and the adjacent pavement.

[0003] However, it was found in practice that the fast-setting cement slurry entered the foundation pit through the gap between the externally threaded inner tube and the bottom of the foundation pit. When grouting, the gap between the externally threaded inner tube and the bottom of the foundation pit was narrow in the leveling device in the prior art. After leveling, part of the externally threaded inner tube was in close contact with the bottom of the foundation pit, or even without a gap, resulting in a slow grouting speed and prolonged time for rapid plate replacement of the airport pavement.

[0004] When the pavement of an airport is quickly replaced, how to shorten the time required for grouting operations is a direction that technicians in this field are constantly exploring.

[0005] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0006] In view of the problems existing in the prior art, the purpose of the utility model is to provide a grouting leveling structure for rapid plate replacement of airport pavement, which ensures that the grouting channel remains unobstructed after the precast concrete slab is leveled and will not be affected by the leveling operation.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] The utility model provides a grouting and leveling structure for rapid plate replacement on an airport pavement, the grouting and leveling structure comprising: a plurality of sleeves with internal threads are fixed in a precast concrete slab, the sleeves are connected to the upper space and the lower space of the precast concrete slab, a supporting short section is arranged in the sleeve, an external thread is arranged on the outer peripheral wall of the supporting short section, the external thread on the supporting short section cooperates with the internal thread of the sleeve, so that the supporting short section can move up and down in the sleeve, the lower end of the supporting short section is arranged to be a cone protruding downward, a grouting channel is arranged in the supporting short section, the inlet of the grouting channel is arranged on the top surface of the supporting short section, and the outlet of the grouting channel is arranged on the conical surface of the lower end of the supporting short section.

[0009] Furthermore, the outlet of the grouting channel is arranged at the upper part of the conical surface at the lower end of the supporting short section.

[0010] Furthermore, the inlet of the grouting channel is configured to be polygonal.

[0011] Furthermore, the inlet of the grouting channel is arranged to be triangular or square.

[0012] The advantages of the grouting leveling structure for rapid plate replacement of airport pavement of the utility model are:

[0013] By screwing the support pup joint, the length of the support pup joint extending below the precast concrete slab is controlled, so as to level the precast concrete slab. After leveling, the quick-setting cement slurry fills the space between the foundation pit and the precast concrete slab through the grouting channel. Setting the outlet of the grouting channel on the conical surface at the lower end of the support pup joint can avoid the outlet being blocked due to the up and down adjustment of the support pup joint, ensuring the rapid completion of the grouting operation. In addition, multiple grouting channels on the precast concrete slab can operate simultaneously, which improves the grouting efficiency.

[0014] The outlet of the grouting channel is arranged at the upper part of the cone surface, so as to avoid the situation that the grouting is not smoothly discharged due to the contact between the supporting short section and the bottom of the foundation pit.

[0015] The inlet of the grouting channel is set in a polygonal shape. By turning the crank that matches the shape of the inlet, the lifting and lowering of the supporting short section can be controlled, making the leveling operation easier. The common shapes of the crank connector are triangle and square. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1It is a schematic diagram of the use of the grouting leveling structure for rapid plate replacement of the airport pavement of the utility model;

[0018] Figure 2 It is a cross-sectional schematic diagram of a grouting and leveling structure for rapid plate replacement of an airport pavement according to the utility model;

[0019] Figure 3 This is one of the top views of the grouting and leveling structure for rapid plate replacement on an airport pavement of the utility model;

[0020] Figure 4 The second top view of the grouting and leveling structure for rapid plate replacement of the airport pavement of the utility model;

[0021] Figure 5 It is a schematic diagram of the installation of the hanger in the utility model;

[0022] Figure 6 It is a schematic diagram of the foundation pit in the utility model;

[0023] Figure 7 It is a side view of the well body plate in the utility model;

[0024] Figure 8 It is a schematic diagram of the lifting lug in the utility model;

[0025] In the figure, 1 is a precast concrete slab, 2 is a grouting leveling structure, 3 is a casing, 4 is a supporting short-circuit, 5 is a grouting channel, 6 is an inlet, 6 is an 'inlet, 7 is an outlet, 8 is a well hole, 9 is an offset hydrant well, 10 is a mounting frame, 11 is a mounting hole, 12 is a steel bar, 13 is a foundation pit, 14 is a socket, 15 is a well body plate, 16 is a steel bar pre-groove, and 17 is a lifting lug. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention. Example

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, it is a specific embodiment of the grouting leveling structure for rapid plate replacement of airport pavement of the utility model. In this embodiment, four grouting leveling structures 2 are arranged at the four corners of the precast concrete slab 1, and the grouting leveling structure specifically includes: a sleeve 3 is fixed in the precast concrete slab 1, and the inner wall of the sleeve 3 has an internal thread, and the sleeve 3 connects the upper space and the lower space of the precast concrete slab 1, and a support short section 4 is arranged in the sleeve 3, and the outer peripheral wall of the support short section 4 is provided with an external thread, and the external thread 4 on the support short section cooperates with the internal thread of the sleeve 3, so that the support short section 4 can move up and down in the sleeve 3, and the lower end of the support short section 4 is arranged in a downwardly protruding cone, and a grouting channel 5 is arranged in the support short section 4, and the inlet 6 of the grouting channel 5 is arranged on the top surface of the support short section 4, and the outlet 7 of the grouting channel 5 is arranged on the conical surface of the lower end of the support short section 4.

[0031] By screwing the support pup section 4, the length of the support pup section 4 extending below the precast concrete slab 1 is controlled, so as to level the precast concrete slab 1. After leveling, the quick-setting cement slurry fills the space between the foundation pit and the precast concrete slab 1 through the grouting channel 5. Setting the outlet 7 of the grouting channel 5 on the conical surface at the lower end of the support pup section 4 can avoid the outlet 7 being blocked due to the up and down adjustment of the support pup section 4, and ensure the rapid completion of the grouting operation. In addition, multiple grouting channels 5 on the precast concrete slab 1 can operate simultaneously, which improves the grouting efficiency.

[0032] The outlet 7 of the grouting channel 5 is arranged on the upper part of the conical surface at the lower end of the support short section 4. This avoids the situation where the grouting is not smooth due to the contact between the support short section 4 and the bottom of the foundation pit.

[0033] The inlet 6 of the grouting channel 5 is arranged in a square shape. A crank is matched with the inlet 6, and the insertion end of the crank is square. The insertion end of the crank is inserted into the inlet 6 of the grouting channel 5. By turning the crank, the lifting and lowering of the supporting short section 4 can be controlled, and the leveling operation is easier. Example

[0034] like Figure 4 As shown, the structure of this embodiment is basically the same as that of the first embodiment, and the similarities are not repeated here. The difference is that the inlet 6' of the grouting channel 5 is set in a triangular shape. A crank is matched with the shape of the inlet 6', and the insertion end of the crank is a triangular square. The insertion end of the crank is inserted into the inlet 6' of the grouting channel 5. By turning the crank, the lifting and lowering of the support short section 4 can be controlled, and the leveling operation is easier. Example

[0035] like Figure 5-Figure 8 As shown, this embodiment is a method for repairing an airport pavement. The method is specifically described by taking a refueling hydrant well as an example, and includes the following steps:

[0036] Step 1, well plate 15, determine the size of the damaged concrete plate that needs to be replaced according to the damaged area of ​​the airport runway, prepare the well plate 15 off-site according to the size, the damaged concrete plate and the well plate 15 are square in shape, and the bottom surface of the well plate 15 is provided with pre-grooved steel bars on the four sides.

[0037] When determining the size of the damaged concrete slab, measure the length a, width b, thickness h and the lengths of the two diagonals L1 and L2 of the damaged concrete slab (the difference between the two measurements cannot exceed 2 mm).

[0038] The prepared well body plate 15 is slightly smaller than the size of the damaged concrete plate, with a length of a-20mm, a width of b-20mm, and a thickness of h-10mm (the difference between the two measurements cannot exceed 2mm).

[0039] When preparing the well plate 15, a well hole 8 is opened in the middle of the well plate 15, and the grouting leveling structure in the above-mentioned embodiment 1 or embodiment 2 is installed on the well plate 15. The grouting leveling structure is not described here. The casing 3 in the grouting leveling structure is pre-fixed at the four corners of the well plate 15. Four detachable lifting ears 17 are provided on the casing 3, and the plug-in end of the lifting ear 17 has an external thread. A steel bar pre-groove 16 is provided on the well plate 15. The cross section of the steel bar pre-groove 16 is trapezoidal.

[0040] Step 2: Remove the offset fuel hydrant well 9. During the flight stop one day before the plate replacement, take the center of the offset fuel hydrant well 9 as the reference, cut the airport pavement within a set range around the well hole, and expose the original center position of the fuel hydrant well; take the original center position of the fuel hydrant well as the reference, cut the airport pavement for the second time, so that the original center position coincides with the well hole center of the prefabricated well plate 15, and the size of the second cut is consistent with the prefabricated well plate 15;

[0041] When cutting with a cutting machine, the depth is h+5mm, and the cut must be accurate, straight, and cut through; fix the hanger on the offset fuel hydrant well 9, and lift the hanger to remove the offset fuel hydrant well;

[0042] The hanger specifically includes: a grid-shaped mounting frame, a plurality of mounting holes 11 are arranged on the mounting frame 10, and expansion bolts fix the mounting frame 10 to the offset fuel hydrant well through the mounting holes 11 at designated positions. When selecting mounting holes for fixing with expansion bolts, avoid selecting mounting holes near broken and damaged parts to avoid the offset fuel hydrant well being broken by expansion bolts.

[0043] Step 3, install the well plate 15. After removing the damaged concrete slab, a foundation pit 13 is left on the pavement. The foundation pit 13 is repaired and cleaned so that the space of the foundation pit 13 meets the installation size of the well plate 15. Sockets 14 are opened in the concrete layer of the pavement around the foundation pit 13. The sockets 14 are located in the middle of the thickness of the concrete layer of the pavement. The number and position of the sockets 14 match the number and position of the steel bar pre-grooves 16. Steel bars 12 longer than the depth of the sockets are inserted into the sockets 14. After the well plate 15 is placed in the foundation pit, the part of the steel bar extending out of the sockets is embedded in the steel bar pre-grooves 16. The supporting short sections 4 at different positions are rotated by the crank to level the well plate 15 so that the well plate 15 is 2 mm higher than the surrounding road panels and has a moderate distance from the surrounding road panels. The slings are released and the lifting equipment is removed.

[0044] Step 4: Fix the well body plate 15, and inject quick-setting cement slurry into the grouting channel 5 of the grouting and leveling mechanism to fill the gap between the well body plate 15 and the foundation pit and adjacent road surface. The slurry needs to emerge from the seam between the prefabricated plate and the adjacent plate to make the well body plate 15 tightly connected with the foundation pit and adjacent road surface.

[0045] Subsequently, the grouting holes were closed, the site was cleaned up, and the equipment and personnel left.

[0046] The removal of the original road surface concrete slab and the installation of the precast slab can be completed within 2 hours, and the cement slurry can reach the usable strength within 1 hour. After the work is completed on the same day, it can be put into use.

[0047] During the break on the second day, the prefabricated panels were installed by cutting, cleaning and grouting the seams according to the caulking material replacement process.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A grouting and leveling structure for rapid plate replacement on an airport pavement, characterized in that: The grouting and leveling structure comprises: a plurality of sleeves with internal threads are fixed in the precast concrete slab, the sleeves are connected with the upper space and the lower space of the precast concrete slab, a supporting short section is arranged in the sleeve, an external thread is arranged on the outer peripheral wall of the supporting short section, the external thread on the supporting short section cooperates with the internal thread of the sleeve, so that the supporting short section can move up and down in the sleeve, the lower end of the supporting short section is arranged in a downwardly protruding cone, a grouting channel is arranged in the supporting short section, the inlet of the grouting channel is arranged on the top surface of the supporting short section, and the outlet of the grouting channel is arranged on the cone surface of the lower end of the supporting short section.

2. The grouting leveling structure according to claim 1, characterized in that: The outlet of the grouting channel is arranged on the upper part of the conical surface at the lower end of the supporting short section.

3. The grouting leveling structure according to claim 1, characterized in that: The inlet of the grouting channel is arranged in a polygonal shape.

4. The grouting leveling structure according to claim 3, characterized in that: The inlet of the grouting channel is arranged in a triangle or a square shape.

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