A high-efficiency and filling method for grouting the bottom of prefabricated assembled pavement slabs

Abstract

This invention relates to the field of road construction technology, providing a highly efficient and comprehensive grouting method for the bottom of precast pavement slabs. The method includes the following steps: pre-embedding several positioning rods in the base layer, allowing the slab to slide vertically along the positioning rods; fixing positioning elements on the positioning rods to form a limiting zone between the base layer and the positioning elements, and sliding the slab within this limiting zone; setting the positioning elements at the same horizontal height while the slab is sliding within the limiting zone; opening multiple grouting holes per unit area on the slab, with at least one grouting hole at the center of each unit area; during grouting, the slab is vertically raised and fixed when it comes into contact with the positioning elements; stopping grouting when the grouting pressure exceeds a set upper limit after the slab is fixed relative to the positioning elements; curing the grout after stopping grouting, and removing the slab after the grout has reached a specified strength. This invention improves grouting efficiency and grouting quality.

Description

Technical Field

[0001] This invention relates to the field of road construction technology, and in particular to a highly efficient and filling method for grouting the bottom of precast pavement slabs. Background Technology

[0002] Currently, common prefabricated pavement panels are constructed by pre-grooving tongue and groove joints on the cross-section. When assembling adjacent panels, a hollow tongue and groove ring is formed along the joint. Grouting through the tongue and groove grouting holes connects the adjacent panels and transfers the load. However, in traditional pressureless grouting methods, mortar is directly injected into the hollow panels, resulting in problems such as incomplete grouting, inadequate grouting at panel corners, uneven panel strength, and slow grouting speed. Furthermore, for thin prefabricated pavement panels, the buoyancy of the grout causes spatial displacement of the panels, easily leading to changes in flatness and slope. The technical problem this invention aims to solve is to propose a highly efficient and comprehensive grouting method for the bottom of prefabricated pavement panels, addressing the issues of existing pressureless grouting methods and buoyancy problems in lightweight pavement panel grouting. Summary of the Invention

[0003] The purpose of this invention is to provide a highly efficient and comprehensive grouting method for the bottom of precast pavement slabs, in order to solve the problems existing in the prior art, thereby improving grouting efficiency and grouting quality.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides a highly efficient and filling method for grouting the bottom of precast pavement slabs, comprising the following steps:

[0005] Before grouting, several positioning rods are pre-embedded in the base layer and distributed around the plate, so that the plate can slide vertically along the positioning rods;

[0006] A positioning element is fixed on the positioning rod to form a limiting range between the base layer and the positioning element, and the plate is slidably arranged within the limiting range.

[0007] When the plate slides within the limiting range, the plurality of positioning elements are set at the same horizontal height;

[0008] Multiple grouting holes are opened on the plate at a unit area, and at least one of the grouting holes is arranged at the center of the unit area.

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

[0010] During grouting, the plate is raised vertically and fixed when it comes into contact with the positioning element;

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

[0012] After grouting is stopped, the grouting is cured, and the slab is removed after the grouting has reached the specified strength.

[0013] Preferably, when fixing the positioning element on the positioning rod, the positioning element includes a road panel and several nuts, and the nuts are screwed one-to-one with the positioning rod, so that the road panel is horizontally fixed on the positioning rod by the several 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 the perimeter using quick-setting mortar.

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

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

[0017] Preferably, five grouting holes are provided per unit area, with one located at the center of the unit area and the other four located 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 1.5m × 1.5m.

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

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

[0022] This invention pre-embeds several positioning rods along the base layer within the construction area, distributing them around the slab. The slab is slidably connected to the positioning rods, achieving a limiting effect on the slab. Positioning components are fixed to the positioning rods, forming a limiting range for the slab. When the slab slides along the positioning rods, it abuts against the positioning components, allowing the slab to be distributed at the same horizontal height. Unit areas are divided on the slab, with grouting holes opened at the center of each unit area. Grout is injected into these holes at a certain pressure. During grouting, the slab is lifted by buoyancy and, under the limiting effect of the positioning rods, moves vertically upwards. After the slab abuts against the positioning components, it is fixed in place. Furthermore, after the slab is fixed to the positioning rods, the grouting pressure is monitored. Grouting stops when the pressure reaches its upper limit, effectively improving grouting efficiency, ensuring uniform grouting strength, and reducing slab misalignment caused by buoyancy, thus improving grouting quality. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of the efficient and filling prefabricated pavement slab bottom grouting method of the present invention.

[0025] Figure 2 This is a schematic diagram of the structure of the plates in this invention;

[0026] Figure 3 This is a flowchart illustrating the implementation process of this invention;

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

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Reference Figures 1-3 This invention provides a highly efficient and comprehensive grouting method for the bottom of precast pavement slabs, comprising the following steps:

[0031] Before grouting, several positioning rods 4 are pre-embedded in the base layer and distributed around the plate 1 so that the plate 1 can slide vertically along the positioning rods 4.

[0032] Fix the positioning component on the positioning rod 4 to form a limiting range between the base layer and the positioning component, and slide the plate 1 within the limiting range.

[0033] When plate 1 slides within the limit range, several positioning components are set at the same horizontal height;

[0034] Multiple grouting holes 3 are opened on the plate 1 per unit area, and at least one grouting hole 3 is arranged at the center of the unit area.

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

[0036] During grouting, plate 1 is raised vertically upwards and fixed when it comes into contact with the positioning component;

[0037] Once plate 1 is fixed relative to the positioning component, grouting is stopped when the grouting pressure exceeds the set upper limit.

[0038] After grouting is stopped, the grouting is cured, and the slab 1 is removed after the grouting has reached the specified strength.

[0039] This invention pre-embeds several positioning rods 4 along the base layer within the construction area, distributing them around the slab 1. The slab 1 is slidably connected to the positioning rods 4, achieving a limiting effect on the slab 1. Positioning components are fixed on the positioning rods 4, forming a limiting range for the slab 1. When the slab 1 slides along the positioning rods 4, it abuts against the positioning components, allowing the slab 1 to be distributed at the same horizontal height. Unit areas are divided on the slab 1, with grouting holes 3 opened at the center of each unit area. Grout is injected into these grouting holes 3 at a certain pressure. During the grouting process, the slab 1 can be lifted under buoyancy, but the limiting effect formed by the positioning rods 4 and the positioning components can counteract the upward floating effect of the slurry, thus fixing the slab 1. After the slab 1 is fixed to the positioning rods 4, the grouting pressure is monitored, and grouting is stopped when the upper limit is reached. This effectively improves grouting efficiency, ensures uniform grouting strength, and reduces the possibility of slab 1 shifting due to buoyancy, thereby improving grouting quality. Finally, after stopping grouting, curing is carried out. Once a certain strength is achieved, slab 1 is removed, completing the overall slab bottom grouting process.

[0040] In one embodiment of the present invention, during the process of removing the slab 1 after the grouting has reached the specified strength, the grouting strength at the bottom of the slab is verified by quality control. Thus, the grouting operation at the bottom of the slab is completed when the grouting strength is found to be qualified. At the same time, since the slab 1 is fixed by the positioning component, the detection process of the grouting strength at the bottom of the slab is reduced by the influence of external interference, which effectively improves the accuracy of the grouting strength detection and judgment and improves the grouting quality at the bottom of the slab.

[0041] Furthermore, when fixing the positioning component on the positioning rod 4, the positioning component includes the road panel 2 and several nuts 5. The nuts 5 are screwed one-to-one with the positioning rod 4, and the road panel 2 is horizontally fixed on the positioning rod 4 by the several nuts 5.

[0042] In this technical solution, the positioning component is formed by the nut 5 screwed onto the positioning rod 4 and the road panel 2. The laser leveling instrument and other devices are used to make several nuts 5 at the same horizontal height, and then the nuts 5 are 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 the perimeter using quick-setting mortar.

[0044] Since there are gaps between the two side walls of the road slab and the base layer, sealing these gaps with quick-setting mortar can ensure the sealing effect of the grouting and improve the grouting quality.

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

[0046] By installing a one-way valve 6 inside the grouting hole 3, the grouting direction is restricted during the grouting process, ensuring the grouting effect. The one-way valve 6 can also effectively prevent grout from overflowing from other grouting holes 3 that are far from the central grouting hole 3.

[0047] In one embodiment of this technical solution, during the grouting process, a one-way valve 6 is only installed in the grouting hole 3 located at the center of the unit area, while pressure valves are installed in the remaining grouting holes 3. As the grouting process proceeds, the grout overflows along the grouting hole 3 after filling the plate 1. The grouting pressure is limited by the pressure valve. When grout 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 and subsequent curing can be carried out, thus fully improving the grouting efficiency.

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

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

[0050] Furthermore, five grouting holes 3 are provided per unit area, with one located at the center of the unit area and the other four located at the four corners of the unit area.

[0051] Five grouting holes 3 are distributed in a unit area, with the four corner grouting holes 3 spaced at the same distance from the central grouting hole 3. During grouting, grout can be injected into all five grouting holes 3 simultaneously, or only into the central grouting hole 3. Thus, when the grouting pressure exceeds the set upper limit, the grout can overflow from the remaining grouting holes 3 that are far from the central grouting hole 3, which facilitates the improvement of the efficiency of personnel in gradual construction.

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

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

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

[0055] This invention proposes a highly efficient and comprehensive grouting method for the bottom of precast pavement slabs:

[0056] This technical solution first embeds positioning rods 4 along the four corners of the road panel 2 in the base layer, and then fixes the road panel 2 to the positioning rods 4 with 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 to sliding on the positioning rods 4. With the buoyancy of grouting, the plate 1 can be raised vertically and abut against the nuts 5. Five grouting holes 3 are opened in the unit area divided along the upper edge of the plate 1. One grouting hole 3 is opened in the center, and the other grouting holes 3 are distributed at the four corners of the unit area. A one-way valve 6 is also set in the grouting. As the grouting process is carried out, the plate 1 is raised by the buoyancy of grouting and stops after abutting against the road panel 2. The grouting pressure is detected by the pressure sensor. When the grouting pressure exceeds the set upper limit, the grouting can be stopped. After the grouting is cured and its structure is stable, the plate 1 can be removed.

[0057] In the description of this invention, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. The embodiments described above are merely preferred embodiments of the invention and are not intended to limit the scope of the invention. Various modifications and improvements made to the technical solutions of this invention by those skilled in the art without departing from the spirit of the invention should fall within the protection scope defined by the claims of this invention.

Claims

1. A highly efficient and filling method for grouting the bottom of precast pavement slabs, characterized in that, Includes the following steps: Before grouting, a number of positioning rods (4) are pre-embedded in the base layer and the positioning rods (4) are distributed around the plate (1) so that the plate (1) slides vertically along the positioning rods (4); A positioning element is fixed on the positioning rod (4) to form a limiting interval between the base layer and the positioning element, and the plate (1) is slidably arranged within the limiting interval; When the plate (1) slides within the limiting range, the plurality of positioning elements are set at the same horizontal height; Multiple grouting holes (3) are opened on the plate (1) per unit area, and at least one of the grouting holes (3) is arranged at the center of the unit area; During grouting, grout is injected into the grouting hole (3) located at the center of the unit area with a certain pressure; During grouting, the plate (1) is raised vertically upward and fixed when it abuts against the positioning member; When the plate (1) is fixed relative to the positioning member, grouting is stopped when the grouting pressure is detected to exceed the set upper limit. After grouting is stopped, the grouting is cured, and the slab is removed after the grouting has reached the specified strength (1).

2. The efficient and filling method for grouting the bottom of precast pavement slabs according to claim 1, characterized in that: When fixing the positioning component on the positioning rod (4), the positioning component includes a road panel (2) and several nuts (5). The nuts (5) are screwed one-to-one with the positioning rod (4), and the road panel (2) is horizontally fixed on the positioning rod (4) by the several nuts (5).

3. The efficient and filling method for grouting the bottom of precast pavement slabs according to claim 2, 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 the perimeter by quick-setting mortar.

4. The efficient and filling method for grouting the bottom of precast pavement slabs according to claim 1, characterized in that: A one-way valve (6) is installed inside the grouting hole (3).

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

6. The efficient and filling method for grouting the bottom of precast pavement slabs according to claim 1, characterized in that: Five grouting holes (3) are provided per unit area, with one located at the center of the unit area and the other four located at the four corners of the unit area.

7. The efficient and filling method for grouting the bottom of precast pavement slabs according to claim 1, 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 efficient and filling method for grouting the bottom of precast pavement slabs according to claim 1, characterized in that: The unit area is 1.5m × 1.5m.

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

Images