Efficient-filling prefabricated pavement prefabricated slab bottom grouting method

Abstract

The invention relates to the technical field of pavement construction, and provides an efficient-filling fabricated pavement prefabricated slab bottom grouting method which comprises the following steps: pre-burying a plurality of positioning rods on a base layer, and enabling a slab to vertically slide along the positioning rods; a positioning piece is fixed to the positioning rod, a limiting interval is formed between the base layer and the positioning piece, and the plate is arranged in the limiting interval in a sliding mode; when the plate block is connected in the limiting interval in a sliding mode, the multiple positioning pieces are arranged at the same horizontal height; a plurality of grouting holes are formed in the plate according to the unit area, and at least one grouting hole is formed in the center of the unit area; during grouting, the plate is vertically and upwards lifted and is fixed when abutting against the positioning piece; after the plate is fixed relative to the positioning piece, when it is detected that the grouting pressure exceeds the set upper limit, grouting is stopped; and after the grouting is stopped, the grouting is maintained, and the plates are dismantled after the specified strength of the grouting is generated. The grouting efficiency can be improved, and the grouting quality can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of pavement construction, and in particular to a high-efficiency and filling method for grouting the bottom of a prefabricated assembled pavement slab. Background Art

[0002] At present, the common prefabricated road panels are made by reserving a tongue and groove on the cross section. When two adjacent panels are assembled, a hollow tongue and groove ring is formed along the direction of the panel seam. The two adjacent panels are connected and the load is transferred by grouting through the tongue and groove grouting holes. In the tongue and groove pressureless grouting method used in the traditional method, mortar is directly poured into the hollow plate, which has problems such as insufficient grouting, failure to grout the panel corners, uneven panel forming strength, and slow grouting speed. In addition, for light and thin prefabricated road panels, the buoyancy of the slurry causes the spatial position of the road panel to shift, which easily causes changes in the flatness and slope of the road panel. The technical problem to be solved by the present invention is to propose an efficient and full bottom grouting method for prefabricated road surface panels in view of the problems of the existing tongue and groove pressureless grouting method and the buoyancy of the grouting of light road panels. Summary of the invention

[0003] The purpose of the present invention is to provide a highly efficient and filling method for grouting the bottom of prefabricated assembled pavement slabs, so as to solve the problems existing in the above-mentioned prior art, thereby improving the grouting efficiency and the grouting quality.

[0004] To achieve the above object, the present invention provides the following solution: The present invention provides a method for grouting the bottom of a prefabricated pavement slab with high efficiency and filling, comprising the following steps:

[0005] Before grouting, a plurality of positioning rods are pre-buried on the base layer, and the plurality of positioning rods are distributed around the plate, so that the plate slides vertically along the positioning rods;

[0006] Fixing a positioning piece on the positioning rod to form a limiting interval between the base layer and the positioning piece, and slidingly arranging the plate in the limiting interval;

[0007] When the plate is slidably connected within the limit interval, a plurality of the positioning members are arranged at the same level;

[0008] A plurality of grouting holes are provided per unit area on the plate, and at least one grouting hole is arranged at the center of the unit area;

[0009] During grouting, grouting is performed at a certain pressure into the grouting hole located at the center of the unit area;

[0010] During grouting, the plate is lifted vertically upward and fixed when it abuts against the positioning member;

[0011] When the plate is fixed relative to the positioning member and the grouting pressure is detected to exceed a set upper limit, the grouting is stopped;

[0012] The grouting is cured after the grouting is stopped, and the slabs are removed after the grouting reaches a specified strength.

[0013] Preferably, when the positioning member is fixed on the positioning rod, the positioning member includes a road panel and a plurality of nuts, the nuts are screwed to the positioning rod in a one-to-one correspondence, and the road panel is horizontally fixed on the positioning rod through the plurality of nuts.

[0014] Preferably, when the road panel is horizontally fixed on the positioning rod, the gap between the road panel and the base layer is sealed around by quick-setting mortar.

[0015] Preferably, a one-way valve is provided in the grouting hole.

[0016] Preferably, during grouting, the grouting pressure of the grouting pump is detected by a pressure sensor.

[0017] Preferably, there are five grouting holes in the unit area, one of which is located at the center of the unit area, and the remaining four are respectively opened at the four corners of the unit area.

[0018] Preferably, the diameter of the grouting hole is 20-40 mm, and the grouting pressure is 0.1-0.3 MPa.

[0019] Preferably, the unit area is 1.5 m×1.5 m.

[0020] Preferably, the positioning rod is a screw rod with a diameter of 20 mm.

[0021] The present invention discloses the following technical effects:

[0022] The present invention embeds a plurality of positioning rods along the base layer in the construction area, and makes the plurality of positioning rods distributed around the plate, and slides the plate to the positioning rods to realize the limiting effect of the positioning rods on the plate, and fixes the positioning pieces on the positioning rods to form a limiting interval for the plate, and when the plate slides along the positioning rods, the plate is abutted against the positioning pieces, so that the plate can be distributed along the same horizontal height, and a unit area is divided on the plate, and a grouting hole is opened at the center of the unit area, and grouting is injected into the grouting hole with a certain pressure, and during the grouting process, the plate can be lifted by the buoyancy effect, and in the vertical upward direction under the limiting effect of the positioning rods, after the plate and the positioning pieces abut against each other, the plate is fixed, and after the plate and the positioning rods are fixed, the grouting pressure is detected, and the grouting is stopped after the grouting pressure reaches the upper limit, thereby effectively improving the grouting efficiency, making the grouting molding strength uniform, and reducing the situation of the plate dislocation caused by the influence of buoyancy, so as to achieve the improvement of the grouting quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 It is a three-dimensional structural diagram of the highly efficient and filling bottom grouting method of prefabricated pavement slabs of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the plate in the present invention;

[0026] Figure 3 It is an implementation flow chart of the present invention;

[0027] Among them, 1. Plate; 2. Road panel; 3. Grouting hole; 4. Positioning rod; 5. Nut; 6. One-way valve. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Reference Figure 1-Figure 3 The present invention provides a method for grouting the bottom of a prefabricated pavement slab with high efficiency and filling, comprising the following steps:

[0031] Before grouting, a number of positioning rods 4 are pre-buried on the base layer, and the positioning rods 4 are distributed around the plate 1 so that the plate 1 can slide vertically along the positioning rods 4;

[0032] Fix the positioning piece on the positioning rod 4 to form a limit interval between the base layer and the positioning piece, and slide the plate 1 into the limit interval;

[0033] When the plate 1 is slidably connected within the limit interval, the plurality of positioning members are arranged at the same level;

[0034] A plurality of grouting holes 3 are provided per unit area on the plate 1, and at least one grouting hole 3 is arranged at the center of the unit area;

[0035] During grouting, grouting is performed at a certain pressure into the grouting hole 3 located at the center of the unit area;

[0036] During grouting, the plate 1 is lifted vertically upward and fixed when it abuts against the positioning piece;

[0037] When the plate 1 is fixed relative to the positioning member and the grouting pressure is detected to exceed the set upper limit, the grouting is stopped;

[0038] After the grouting is stopped, the grouting is cured, and the plate 1 is removed after the grouting reaches the specified strength.

[0039] The present invention embeds a plurality of positioning rods 4 along the base layer in the construction area, and makes the plurality of positioning rods 4 distributed around the plate 1, and slides the plate 1 on the positioning rods 4 to realize the limiting effect of the positioning rods 4 on the plate 1, and fixes the positioning pieces on the positioning rods 4 to form a limiting interval for the plate 1. When the plate 1 slides along the positioning rods 4, the plate 1 is counteracted by the positioning pieces by the plate 1, so that the plate 1 can be distributed along the same horizontal height, and a unit area is divided on the plate 1, and a grouting hole 3 is opened at the center of the unit area. Grouting is performed into the grouting hole 3 with a certain pressure, and during the grouting process, the plate 1 can be lifted under the action of buoyancy, but at the same time, the limiting effect formed by the positioning rods 4 and the positioning pieces can offset the floating effect of the plate 1 generated by the buoyancy of the slurry, so that the plate 1 is fixed. After the plate 1 is fixed to the positioning rods 4, the grouting pressure is detected, and the grouting is stopped after the grouting pressure reaches the upper limit, so that the grouting efficiency is effectively improved, and the grouting forming strength is uniform, and the situation of the plate 1 being displaced due to the influence of buoyancy is also reduced, so as to improve the grouting quality. Finally, after stopping the grouting, maintenance is carried out. When a certain strength is achieved, plate 1 is removed to complete the overall bottom grouting step.

[0040] In one embodiment of the present invention, during the process of removing the plate 1 after the grouting produces the specified strength, the quality control and verification of the grouting strength of the bottom of the plate is carried out, so that the grouting operation of the bottom of the plate is completed when the grouting strength is detected to be qualified. At the same time, since the technical solution limits and fixes the plate 1 through the positioning part, the detection process of the grouting strength of the bottom of the plate is reduced. The influence caused by external interference is effectively improved, the accuracy of the grouting strength detection and judgment is effectively improved, and the quality of the grouting of the bottom of the plate is improved.

[0041] Furthermore, when fixing the positioning member on the positioning rod 4 , the positioning member includes a road panel 2 and a plurality of nuts 5 , the nuts 5 are screwed to the positioning rod 4 in a one-to-one correspondence, and the road panel 2 is horizontally fixed on the positioning rod 4 through the plurality of nuts 5 .

[0042] In the present technical solution, the positioning member is formed by a nut 5 screwed on a positioning rod 4 and cooperated with the road panel 2. A laser leveler and other devices are used to make several nuts 5 at the same level, and then the nut 5 is fixed to one side of the road panel 2 to achieve horizontal fixation of the road panel 2.

[0043] Furthermore, when the road panel 2 is horizontally fixed on the positioning rod 4, the gap between the road panel 2 and the base layer is sealed around by the quick-setting mortar.

[0044] Since there is a gap between the side wall surface of the road panel 2 and the base layer, the gap is sealed by using fast-setting mortar to ensure the sealing effect of grouting and improve the grouting quality.

[0045] Furthermore, a one-way valve 6 is provided in the grouting hole 3 .

[0046] By setting a one-way valve 6 in the grouting hole 3, during the grouting process, the one-way valve 6 limits the grouting direction to ensure the grouting effect, and the one-way valve 6 can also effectively prevent the grouting from overflowing from the remaining grouting holes 3 away from the central grouting hole 3.

[0047] In one embodiment of the present technical solution, during the grouting process, a one-way valve 6 is only provided in the grouting hole 3 located at the center of the unit area, while the other grouting holes 3 are provided with pressure valves. As the grouting process proceeds, the grouting fills the plate 1 and then overflows along the grouting hole 3. The grouting pressure is limited by the pressure valve. When grouting overflow is observed in the grouting hole 3, it can be directly determined that the grouting pressure has reached the set upper limit. At this time, the grouting can be stopped for subsequent maintenance, thereby fully realizing the improvement of the grouting efficiency.

[0048] Furthermore, during grouting, the grouting pressure of the grouting pump is detected by a pressure sensor.

[0049] The pressure sensor is used to detect the output pressure of the grouting pump to ensure the grouting efficiency. When the grouting pressure exceeds the upper limit, the grouting is determined to be completed. Under the limiting effect of the road panel 2 and the positioning rod 4 nut 5, the grouting quality is effectively guaranteed and the use effect is improved.

[0050] Furthermore, five grouting holes 3 are provided in the unit area, one of which is located at the center of the unit area, and the remaining four are respectively provided at the four corners of the unit area.

[0051] The five grouting holes 3 are distributed in the unit area so that the four grouting holes 3 arranged at the four corners have the same spacing as the central grouting hole 3. During grouting, grouting can be injected into the five grouting holes 3 at the same time, or only into the central grouting hole 3. When the grouting pressure exceeds the set upper limit, the grouting can overflow from the remaining grouting holes 3 away from the central grouting hole 3, thereby facilitating improving the efficiency of construction by personnel.

[0052] Furthermore, the diameter of the grouting hole 3 is 20-40 mm, and the grouting pressure is 0.1-0.3 MPa.

[0053] Furthermore, the unit area is 1.5 m×1.5 m.

[0054] Furthermore, the positioning rod 4 is a screw rod, and the diameter is 20 mm.

[0055] The present invention proposes a highly efficient and filling method for grouting the bottom of a prefabricated assembled pavement slab:

[0056] In the technical scheme, the positioning rods 4 are first embedded in the base layer along the four corners of the road panel 2, and the road panel 2 is fixed to the positioning rods 4 by nuts 5 to keep the road panel 2 horizontal. A gap is set between the road panel 2 and the base layer through the positioning rods 4, and the plate 1 is slidably connected in the gap. At the same time, the plate 1 is limited and slidably connected to the positioning rods 4. With the action of the grouting buoyancy, the plate 1 can be lifted vertically to resist the nuts 5, and five grouting holes 3 are opened in the unit area divided by the upper edge of the plate 1, one grouting hole 3 is opened in the center, and the remaining grouting holes 3 are distributed at the four corners of the unit area, and a one-way valve 6 is also provided in the grouting. As the grouting process proceeds, the plate 1 is lifted by the grouting buoyancy and stops after resisting the road panel 2. The grouting pressure is detected by a pressure sensor. After the grouting pressure exceeds the set upper limit, the grouting can be stopped, and the grouting maintenance can be performed and the plate 1 can be removed after its structure is stable.

[0057] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, 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. The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solution of the present invention by ordinary technicians in this field should all fall within the scope of protection determined by the claims of the present invention.

Claims

1. An efficient and filling method for grouting the bottom of a prefabricated pavement slab, characterized in that: The following steps are involved: Before grouting, a plurality of positioning rods (4) are pre-buried on the base layer, and the plurality of positioning rods (4) are distributed around the plate (1), so that the plate (1) slides vertically along the positioning rods (4); A positioning piece is fixed on the positioning rod (4) so ​​that a limiting interval is formed between the base layer and the positioning piece, and the plate (1) is slidably arranged in the limiting interval; When the plate (1) is slidably connected within the limit interval, a plurality of the positioning members are arranged at the same level; A plurality of grouting holes (3) are provided per unit area on the plate (1), and at least one grouting hole (3) is arranged at the center of the unit area; During grouting, grouting is performed at a certain pressure into the grouting hole (3) located at the center of the unit area; During grouting, the plate (1) is lifted vertically upward and fixed when it abuts against the positioning member; When the plate (1) is fixed relative to the positioning member and it is detected that the grouting pressure exceeds a set upper limit, the grouting is stopped; After the grouting is stopped, the grouting is cured, and the plate (1) is removed after the grouting produces a specified strength.

2. The method for grouting the bottom of a prefabricated pavement slab with high efficiency and filling according to claim 1 is characterized in that: When the positioning member is fixed on the positioning rod (4), the positioning member comprises a road panel (2) and a plurality of nuts (5), the nuts (5) are screwed to the positioning rod (4) in a one-to-one correspondence, and the road panel (2) is horizontally fixed on the positioning rod (4) through the plurality of nuts (5).

3. The method for grouting the bottom of a prefabricated pavement slab with high efficiency and filling according to claim 2 is characterized in that: When the road panel (2) is horizontally fixed on the positioning rod (4), the gap between the road panel (2) and the base layer is sealed around by means of quick-setting mortar.

4. The method for grouting the bottom of a prefabricated pavement slab with high efficiency and filling according to claim 1 is characterized in that: A one-way valve (6) is arranged in the grouting hole (3).

5. The high-efficiency and filling method for grouting the bottom of prefabricated pavement slabs according to claim 1 is characterized in that: During grouting, the grouting pressure of the grouting pump is detected by a pressure sensor.

6. The high-efficiency and filling method for grouting the bottom of prefabricated pavement slabs according to claim 1 is characterized in that: There are five grouting holes (3) in the unit area, one of which is located at the center of the unit area, and the remaining four are respectively opened at the four corners of the unit area.

7. The high-efficiency and filling method for grouting the bottom of prefabricated pavement slabs according to claim 1 is characterized in that: The diameter of the grouting hole (3) is 20-40 mm, and the grouting pressure is 0.1-0.3 MPa.

8. The high-efficiency and filling method for grouting the bottom of prefabricated pavement slabs according to claim 1 is characterized in that: The unit area is 1.5m×1.5m.

9. The high-efficiency and filling method for grouting the bottom of prefabricated pavement slabs according to claim 1 is characterized in that: The positioning rod (4) is a screw rod with a diameter of 20 mm.

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