Device for improving compactness of grouting material at low concave part of corrugated pipe

Abstract

The utility model relates to a device for improving compactness of a grouting material at a concave position of a corrugated pipe, which belongs to the technical field of bridge construction and comprises a connecting pipe sleeve sleeved outside the lowest position of the corrugated pipe, the connecting pipe sleeve is fixed on the corrugated pipe, and a slurry discharge pipe communicated with an inner hole of the corrugated pipe is fixed at the top of the middle of the connecting pipe sleeve. And the upper end of the slurry discharging pipe penetrates through the beam body and is connected with a slurry discharging valve. According to the utility model, the compactness of duct grouting is enhanced; the anti-rust capability of the steel strand is enhanced, and the box girder can achieve design and use functions; maintenance cost and quality safety accidents caused by the fact that grouting materials of the box girder are not compact are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a device for improving the compactness of grouting material in the low concave part of a corrugated pipe, and belongs to the technical field of bridge construction. BACKGROUND

[0002] Prestressed duct grouting can protect the steel bars or steel strands from being easily corroded, and can also make the stressed overall project uniformly stressed, form a whole stressed structure, and enhance the stability of the structure.

[0003] The current prestressed duct is formed by pouring a corrugated pipe in a box girder, and most of them are "U" shaped, with both ends raised and the middle concave. Such a design is prone to cause rainwater, curing water and sundries to enter the duct from the raised ports at both ends, and the water and sundries will be deposited in the low concave part. Before grouting, if the water is not cleaned or not thoroughly cleaned, the grouting material will mix with the water or "pass through" the bottom of the water to reach the grouting outlet of the duct, and part of the water and gas will still be deposited in the low concave part of the duct. The grouting liquid itself also has a water secretion property, and if the water secretion rate of the grouting liquid is too large, the secreted water will also be concentrated in the low concave part. Due to the non-compact grouting or the existence of too much water or water secretion in the low concave part of the duct, the steel strands in this part will gradually corrode under the action of water, gas or gas-water mixture; or the water or water secretion in this part will freeze and expand when in a low-temperature environment, and in severe cases, it will cause cracks along the prestressed duct direction, which will further cause water and gas to penetrate, and then cause the steel bars to rust; after the steel bars rust, the volume of the rust will expand, causing the cracks to increase. Such a vicious cycle will directly affect the durability and safety of the beam body. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a device for improving the compactness of grouting material in the low concave part of a corrugated pipe, which solves the problems in the above background technology.

[0005] The utility model relates to a device for improving the compactness of grouting material in the low concave part of a corrugated pipe, which comprises a connecting pipe sleeve sleeved on the outside of the lowest part of the corrugated pipe, the connecting pipe sleeve is fixed on the corrugated pipe, a grouting discharge pipe communicating with the inner hole of the corrugated pipe is fixed on the middle top of the connecting pipe sleeve, and the upper end of the grouting discharge pipe is connected with a grouting valve through the beam body.

[0006] As a preferred, at least one sealing groove is arranged on the inner side wall of the two ends of the connecting pipe sleeve, a sealing ring is arranged in the sealing groove, and the grouting liquid can be better prevented from leaking.

[0007] As a preferred, an adhesive fixing groove is arranged on the inner side wall of the connecting pipe sleeve outside the sealing groove, a sealing and fixing adhesive layer is filled in the adhesive fixing groove, the connecting pipe sleeve can be conveniently fixed on the corrugated pipe, and the grouting liquid can be better prevented from leaking.

[0008] As a kind of preferred, corrugated pipe is sectional structure, the inner wall of connecting pipe sleeve is provided with annular limiting boss limiting corrugated pipe inner end, limiting boss is at the outside of slurry discharge pipe, better adapt sectional corrugated pipe structure, and limiting boss can be quickly positioned the end of corrugated pipe, and prevent corrugated pipe from blocking slurry discharge pipe.

[0009] As a kind of preferred, the top of connecting pipe sleeve is provided with mounting hole, slurry discharge pipe lower end is fixed in mounting hole, facilitate positioning installation slurry discharge pipe.

[0010] As a kind of preferred, the top of slurry discharge pipe is provided with downward slurry outlet elbow, the bottom of slurry outlet elbow is provided with transparent slurry receiving barrel, can be conveniently collected slurry discharge pipe discharged accumulated water, sundries and slurry.

[0011] As a kind of preferred, slurry discharge valve distance beam top surface is 10cm-15cm.

[0012] The utility model has the following beneficial effects:

[0013] The compactness of the hole pressure grouting is enhanced, the rust prevention ability of the steel strand is enhanced, and the box girder can achieve design and use function;

[0014] The maintenance cost and quality safety accident caused by the non-compact pressure grouting material of the box girder are reduced. DETAILED DESCRIPTION

[0015] Figure 1 It is the front view structural schematic diagram of the utility model;

[0016] Figure 2 It is Figure 1 It is the enlarged structural schematic diagram of A place in the middle;

[0017] Figure 3 It is the upper structure schematic diagram of slurry discharge pipe;

[0018] In the drawing: 1, corrugated pipe; 2, beam body; 3, slurry discharge valve; 4, slurry discharge pipe; 5, connecting pipe sleeve; 6, sealing ring; 7, sealing fixed adhesive layer; 8, mounting hole; 9, sealing groove; 10, adhesive fixed groove; 11, limiting boss; 12, slurry outlet elbow; 13, slurry receiving barrel. DETAILED DESCRIPTION

[0019] The utility model is further described in connection with examples as follows.

[0020] Example one, as Figures 1 to 3As shown, the utility model is a kind of improve corrugated pipe low hollow place grouting material compactness device, including the connecting pipe cover 5 of the lowest place outside of corrugated pipe 1, connecting pipe cover 5 is fixed on corrugated pipe 1, the middle top of connecting pipe cover 5 is fixed with the drainage pipe 4 of the communication hole of corrugated pipe 1, the upper end of drainage pipe 4 is connected with drainage valve 3 passing through beam body 2.

[0021] According to the height of hole, beam body 2 is processed, the vertical drainage pipe 4 is made, the drainage pipe 4 can adopt PVC-V pipe material, size DN25x2.0mm, strength 1.6MPa.

[0022] During construction, first, the reinforcement cage in beam body 2 is bound and arranged, and the installation position of drainage pipe 4 and connecting pipe cover 5 is selected, the low hollow place of corrugated pipe 1 is generally not a point, but a straight pipe segment.If the low hollow place is a point, the point is selected as the position of drainage pipe 4; if the low hollow place is a straight pipe segment, the central position of the straight pipe segment is selected as the position of drainage pipe 4. When selecting the position of drainage pipe 4, the interference of vertical structural reinforcement should be avoided as far as possible, the connecting pipe cover 5 is installed at the selected position of drainage pipe 4, drainage pipe 4 is upward, and the sealing setting of connecting pipe cover 5 on corrugated pipe 1 is good. Drainage pipe 4 is fixed with adjacent structural reinforcement in vertical direction by binding mode; when the position is contradictory with structural reinforcement, it can be slightly inclined to adjust. The drainage valve 3 of drainage pipe 4 should be in closed state before grouting. Then, beam body 2 is poured, and the drainage pipe 4 and drainage valve 3 are protected during pouring beam body concrete, and are not damaged.

[0023] After the pouring of beam body 2 is completed, maintenance is needed, and after the maintenance is completed, protective reinforcement or steel strand is inserted into the hole of corrugated pipe 1, then grouting is carried out, the drainage valve 3 of connecting pipe cover 5 is checked, and is in closed state during hole grouting; the hole is normally grouted by opening the hole grouting program, and the hole outlet valve can be closed after the thick grout flows out; the hole inlet pressure is kept at 0.5-0.7MPa, the drainage valve 3 is opened after 2min, the grouting is continuously carried out, and the inlet pressure is kept at 0.5-0.7MPa, until the normal grout flows out from the drainage valve 3, and the drainage valve 3 is closed; the normal grout flows out from the drainage valve 3, which indicates that the gas and waste liquid in the low hollow place of hole have been discharged, and the grouting night is filled, and the whole hole is grouted and compacted; after the grouting night is solidified, the excess drainage pipe 4 on the top surface of beam body 2 is cut off.

[0024] In the embodiment two, on the basis of the embodiment one, the inner side wall of the two ends of connecting pipe cover 5 is provided with not less than one sealing groove 9, and the sealing ring 6 is arranged in the sealing groove 9.

[0025] The inner side wall of connecting pipe cover 5 outside the sealing groove 9 is provided with adhesive fixing groove 10, and the sealing fixed adhesive layer 7 is filled in the adhesive fixing groove 10.

[0026] The corrugated pipe 1 is of a segmented structure, and the inner wall of the connecting pipe sleeve 5 is provided with an annular limiting boss 11 for limiting the inner end of the corrugated pipe 1, and the limiting boss 11 is located at the outer side of the slurry discharge pipe 4.

[0027] The top of the connecting pipe sleeve 5 is provided with a mounting hole 8, and the lower end of the slurry discharge pipe 4 is fixed in the mounting hole 8. The slurry discharge pipe 4 is vertically inserted in the mounting hole 8, and the bottom opening of the slurry discharge pipe 4 is flush with the inner wall of the connecting pipe sleeve 5, so as to avoid being scratched by the steel strand. The connection between the slurry discharge pipe 4 and the connecting pipe sleeve 5 is achieved by using a hot melting method, and after the connection, a circle of sealant is applied at the joint to ensure the sealing performance of the joint.

[0028] The top of the slurry discharge pipe 4 is provided with a downward slurry outlet elbow 12, and the bottom of the slurry outlet elbow 12 is provided with a transparent slurry receiving barrel 13. Before pressing the slurry, the slurry receiving barrel 13 is placed below the slurry outlet elbow 12.

[0029] The distance between the slurry discharge valve 3 and the top surface of the beam body 2 is 10-15 cm.

[0030] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

[0031] In the description of the present utility model, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and do not require the present utility model to be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present utility model.

Claims

1. A device for improving the compaction of bell and spigot joint material in a corrugated pipe low, characterized by: The connecting sleeve (5) is sleeved outside the lowest part of the bellows (1), is fixed on the bellows (1), and is provided with the discharge pipe (4) communicating with the inner hole of the bellows (1) at the middle top.

2. The bellows low point grout material densification device of claim 1, wherein: The inner side wall of the two ends of the connecting sleeve (5) is provided with not less than one sealing groove (9), and the sealing groove (9) is provided with a sealing ring (6).

3. The bellows low point grout material densification device of claim 2, wherein: The inner side wall of the connecting sleeve (5) outside the sealing groove (9) is provided with a glue fixing groove (10), and the glue fixing groove (10) is filled with a sealing fixing glue layer (7).

4. The bellows low point grout material densification enhancement device of claim 1, wherein: The bellows (1) is of a sectional structure, the inner wall of the connecting sleeve (5) is provided with an annular limiting boss (11) limiting the inner end of the bellows (1), and the limiting boss (11) is outside the discharge pipe (4).

5. The bellows low point grout material densification enhancement device of claim 1, wherein: The top of the connecting sleeve (5) is provided with a mounting hole (8), and the lower end of the discharge pipe (4) is fixed in the mounting hole (8).

6. The bellows low point grout material densification enhancement device of claim 1, wherein: The top of the discharge pipe (4) is provided with a downward discharge elbow (12), and the bottom of the discharge elbow (12) is provided with a transparent discharge barrel (13).

7. The bellows low point grout material densification enhancement device of claim 1, wherein: The distance between the discharge valve (3) and the top surface of the beam body (2) is 10cm-15cm.

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