CN210141133U

CN210141133U - Micro shield concrete pipe culvert repairing and reinforcing structure

Info

Publication number: CN210141133U
Application number: CN201920686932.4U
Authority: CN
Inventors: 周伟
Original assignee: CHONGQING INSTITUTE OF BUILDING RESEARCH
Current assignee: Chongqing Institute of Building Science Co.,Ltd.
Priority date: 2019-05-14
Filing date: 2019-05-14
Publication date: 2020-03-13
Anticipated expiration: 2029-05-14

Abstract

The utility model discloses a little shield constructs concrete pipe culvert and restores reinforced structure, including locating the exterior sheathing and the inboard inner formword in the pipe culvert structural damage portion outside, the exterior sheathing includes the first steel sheet of hugging closely with the pipe culvert outer wall and bonds at the first sleigh board of this first steel sheet lateral surface, the inner formword hugs closely the pipe culvert inside wall through bearing structure, the damage portion between exterior sheathing and the inner formword chisels the back, has the new framework of steel reinforcement of being connected with former pipe culvert framework of steel reinforcement in the welding of chiseling the portion, and chiseling between exterior sheathing and the inner formword fills concrete layer. The utility model relates to a micro-shield concrete pipe culvert repairing and reinforcing structure, an outer template isolates the outer pipe culvert wall from a rock mass; the rigidity is higher, the forming effect is better, the installation is convenient, the operation of supporting the formwork is simple and convenient, the occupied space is not occupied, and the internal mold can be repeatedly used; the operation time is shortened, the strength is improved quickly, and the method can be popularized and applied in similar projects.

Description

Micro shield concrete pipe culvert repairing and reinforcing structure

Technical Field

The utility model belongs to the technical field of the pipe culvert restoration, specific theory relates to a little shield constructs concrete pipe culvert restoration reinforced structure.

Background

With the need of urban development, the ground space can not meet the need of urban construction, and the underground space is expanded in a large range. Due to the lack of early planning, the space usage in the shallow underground range is quite compact, and the deep range is gradually expanded. However, due to the restriction of various urban conditions, construction operation cannot be performed in a manner similar to large excavation, and the micro-shield pipe-jacking construction technology which occupies a small operation space and has a small influence range quickly becomes a main construction technology for expanding underground space.

However, in the micro-shield pipe jacking construction process, the jacking reinforced concrete pipe culvert is damaged due to the self-quality reasons or the collapse of the tunnel wall, the pressure mutation and the like, and the subsequent construction and use are seriously influenced.

The phenomenon belongs to a common phenomenon in the construction process, and a lining steel sleeve is usually adopted for reinforcing or chiseling off a damaged part, a lining template is added, and the poured concrete is repaired. The treatment method adopting the lining steel sleeve has long treatment period and high cost, and the treatment range usually extends to the front and rear sections of pipe culverts of the disease. The method has the advantages that the damaged part is chiseled off, the lining template is added, the cost for pouring concrete is moderate, the outer wall of the repaired part of the pipe culvert is sharp and unsmooth, the time for waiting for the strength of the concrete is long, the follow-up construction jacking cannot be guaranteed due to the low quality of the repaired part caused by underground water seepage, and the risk is high.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model aims to provide a micro-shield concrete pipe culvert repairing and reinforcing structure, an outer template isolates an outer pipe culvert wall from a rock mass; the rigidity is higher, the forming effect is better, the installation is convenient, the operation of supporting the formwork is simple and convenient, the occupied space is not occupied, and the internal mold can be repeatedly used; the operation time is shortened, the strength is improved quickly, and the method can be popularized and applied in similar projects.

The utility model discloses the purpose realizes like this:

the utility model provides a little shield constructs concrete pipe culvert restoration reinforced structure which the key lies in: including locating the exterior sheathing in the pipe culvert structure damage portion outside and inboard inner formword, the exterior sheathing includes the first steel sheet of hugging closely with the pipe culvert outer wall and bonds at the first sleeveless board of this first steel sheet lateral surface, the pipe culvert inside wall is hugged closely through bearing structure to the inner formword, damage portion between exterior sheathing and the inner formword chisels the back, and the portion welding that chisels has the new framework of steel reinforcement of being connected with former pipe culvert framework of steel reinforcement, and chiseling between exterior sheathing and the inner formword portion of filling concrete layer.

Adopt above-mentioned structure, with the back of chiseling of pipe culvert damage portion, lay the exterior sheathing in the outside of pipe culvert damage portion, the steel sheet flexible provides suitable rigidity, so that the size of laminating pipe culvert, same sleave board also has certain bending effect, characteristics that toughness is strong, combine both, can improve whole effect, certain support intensity has during the assurance construction, can form lubricated mud repair passageway, the shaping is effectual, the interior surface smoothness of the concrete layer of new packing, the exterior sheathing can be stayed in restoreing the structure after the construction, can strengthen the intensity of restoreing the position.

Preferably, the inner formworks comprise a second thin steel plate attached to the inner wall of the pipe culvert and a second muffle plate bonded to the inner side face of the second thin steel plate. By adopting the structure, the inner template and the outer template have the same support rigidity and bending property, and the installation and the use are more convenient.

Preferably, a third muffle plate is arranged between the first thin steel plate and the outer wall of the pipe culvert, and the inner surface of the third muffle plate is smooth. By adopting the structure, the smoothness of the inner surface and the outer surface of the newly filled concrete is further improved.

Preferably, the outer formwork and the inner formwork are formed by splicing a plurality of splicing units along the extension direction of the pipe culvert. By adopting the structure, at least 2 splicing units are spliced, the repair treatment can be carried out section by section, and the concrete layer is more convenient to fill.

Preferably, the supporting structure is a steel pipe supporting structure, and each splicing unit of the outer template and the inner template is correspondingly provided with a steel pipe for supporting. The supporting structure is simple and the use is convenient.

Preferably, the surfaces of the first steel sheet and the second steel sheet are each plated with a zinc layer. By adopting the structure, the corrosion resistance of the steel plate is improved, and particularly, the service life of the outer template can be prolonged.

Preferably, a water stopping layer is filled between the outer template and the rock body. By adopting the structure, the water seepage part can be blocked in advance, the construction is prevented from being influenced, and the water seepage can be prevented from permeating the repaired part.

Preferably, the thickness of the first, second and third avenue boards is 3mm, and the stress compression range is 1/3.

Preferably, the concrete layer is formed by pouring epoxy resin concrete. The epoxy resin concrete is adopted for repairing, so that the strength is high, and the setting time is short.

Has the advantages that:

the utility model relates to a micro-shield concrete pipe culvert repairing and reinforcing structure, an outer template isolates the outer pipe culvert wall from a rock mass; the rigidity is higher, the forming effect is better, the installation is convenient, the operation of supporting the formwork is simple and convenient, the occupied space is not occupied, and the internal mold can be repeatedly used; the operation time is shortened, the strength is improved quickly, and the method can be popularized and applied in similar projects.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the pipe culvert of FIG. 1;

fig. 3 is a repair flow diagram.

Wherein 1 is an outer template, 1a is a first thin steel plate, 1b is a first Freund plate, 1c is a third Freund plate, 2 is an inner template, 2a is a second thin steel plate, 2b is a second Freund plate, 3 is a supporting structure, 4 is a concrete layer, 5 is a water stopping layer, 6 is a pipe culvert, and 7 is a rock mass.

Detailed Description

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like refer to orientations or positional relationships based on those shown in the drawings, and are used only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.

The present invention will be further explained with reference to the following examples and drawings.

Example (b):

the utility model provides a little shield constructs concrete pipe culvert restoration reinforced structure, is by locating the exterior sheathing 1 and the inboard interior sheathing 2 in the 6 structural damage portion outsides of pipe culvert, exterior sheathing 1 and interior sheathing 2 are formed by the concatenation of a plurality of concatenation units along 6 extending direction of pipe culvert. And a water stopping layer 5 is filled between the outer template 1 and the rock mass 7. The outer template 1 consists of a first thin steel plate 1a tightly attached to the outer wall of the pipe culvert 6 and a first muffle plate 1b bonded to the outer side face of the first thin steel plate 1a, a third muffle plate 1c is arranged between the first thin steel plate 1a and the outer wall of the pipe culvert 6, and the inner surface of the third muffle plate 1c is smooth. The inner template 2 consists of a second thin steel plate 2a attached to the inner wall of the pipe culvert 6 and a second muffle plate 2b bonded to the inner side face of the second thin steel plate 2 a; the surfaces of the first thin steel sheet 1a and the second thin steel sheet 2a are plated with a zinc layer. The inner formwork 2 is tightly attached to the inner side wall of the pipe culvert 6 through the supporting structure 3, the supporting structure 3 is a steel pipe supporting structure, and each splicing unit of the outer formwork 1 and the inner formwork 2 is correspondingly provided with a steel pipe for supporting. After the damaged part between the outer template 1 and the inner template 2 is chiseled, a new steel reinforcement framework connected with the original pipe culvert 6 steel reinforcement framework is welded at the chiseled part, a concrete layer 4 is filled in the chiseled part between the outer template 1 and the inner template 2, and the concrete layer 4 is formed by pouring epoxy resin concrete.

The thicknesses of the first, second and

third muffle plates

1b, 2b and 1c are all 3mm, and the stress compression range is 1/3.

Repairing process:

a. chiseling damaged concrete and interface treatment

And chiseling the concrete at the damaged part by adopting a small electric pick or manual roughening mode, and roughening the new and old combined interface at the repaired part.

b. Water-stopping and arc-shaped outer side wall of pipe culvert

Two phi 20mm soft rubber pipes are buried in the main water seepage and incoming direction of the pipe culvert to guide water seepage, and the water seepage is determined according to the actual water seepage amount and is generally 2 times of the water seepage flow. And then sealing the outside rock body by using a water-stopping material from the direction with small water seepage until the sealing is completed, and simultaneously molding the outer side wall of the rock body by using the water-stopping material to form a water-stopping layer, wherein the arc shape of the rock wall at the damaged part is treated according to the size of the arc by taking a circular culvert with the diameter of 2.65m as an example.

c. Supporting external mold

The engineering adopts a bonding structure of the continuous hot galvanized thin steel plate and the PVC.

d. Pipe culvert steel reinforcement framework repair

And repairing the damaged reinforcing steel bar framework of the pipe culvert, adopting electric welding single-side welding, and designing the specification and the size of the reinforcing steel bars to be identical to those of the original pipe culvert.

e. Support internal mold

The inner template is installed section by adopting the same method of the outer template, and is supported by a steel pipe, and the installation length is not more than 30cm each time.

f. Pouring epoxy resin concrete

Epoxy resin concrete is prepared according to the mixing proportion of the epoxy resin concrete, and raw materials are prepared according to the standard requirements. Since the preparation of epoxy resin concrete requires special chemical agents, the engineering preparation of epoxy resin concrete is carried out on the ground. Because manual conveying is adopted, the conveying distance is long, and the final mixing curing agent proportion is determined on the spot according to multiple configuration tests.

The epoxy resin concrete pouring is carried out by adopting a mode of manually entering a mold, and manually extruding and filling. And after the construction is finished for a section, erecting the inner formwork again, and circulating until the construction is finished.

g. Maintaining, removing form and polishing

And after the epoxy resin concrete is poured and is subjected to initial setting, removing the inner mold and covering and curing by using a thin film. And determining the strength of the epoxy resin concrete according to the homotrophy condition test block, and performing pushing operation after the strength reaches 70% of the design strength.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and that those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a little shield constructs concrete pipe culvert restoration reinforced structure which characterized in that: including locating exterior sheathing (1) and the inboard inner formword (2) in the outside of pipe culvert structural damage portion, exterior sheathing (1) includes first sheet steel (1a) of hugging closely with the pipe culvert outer wall and bonds at first sleeveless board (1b) of this first sheet steel (1a) lateral surface, the pipe culvert inside wall is hugged closely through bearing structure (3) in inner formword (2), the damage portion chisel between exterior sheathing (1) and inner formword (2) removes the back, and the portion welding of chiseling has the new framework of steel reinforcement of being connected with former pipe culvert framework of steel reinforcement, and chiseling between exterior sheathing (1) and inner formword (2) removes portion packing concrete layer (4).

2. The micro-shield concrete pipe culvert repairing and reinforcing structure according to claim 1, characterized in that: the inner template (2) comprises a second thin steel plate (2a) closely attached to the inner wall of the pipe culvert and a second muffle plate (2b) adhered to the inner side face of the second thin steel plate (2 a).

3. The micro-shield concrete pipe culvert repairing and reinforcing structure according to claim 1, characterized in that: and a third muffle plate (1c) is arranged between the first thin steel plate (1a) and the outer wall of the pipe culvert, and the inner surface of the third muffle plate (1c) is smooth.

4. The micro-shield concrete pipe culvert repairing and reinforcing structure of claim 1, 2 or 3, wherein: the outer template (1) and the inner template (2) are formed by splicing a plurality of splicing units along the extension direction of the pipe culvert.

5. The micro-shield concrete pipe culvert repairing and reinforcing structure according to claim 4, characterized in that: the supporting structure (3) is a steel pipe supporting structure, and each splicing unit of the outer template (1) and the inner template (2) is correspondingly provided with a steel pipe for supporting.

6. The micro-shield concrete pipe culvert repairing and reinforcing structure according to claim 4, characterized in that: the surfaces of the first steel sheet (1a) and the second steel sheet (2a) are plated with a zinc layer.

7. The micro-shield concrete pipe culvert repairing and reinforcing structure according to claim 4, characterized in that: and a water stopping layer (5) is filled between the outer template (1) and the rock mass.

8. The micro-shield concrete pipe culvert repairing and reinforcing structure according to claim 4, characterized in that: the thicknesses of the first muffle plate (1b), the second muffle plate (2b) and the third muffle plate (1c) are all 3mm, and the stress compression range is 1/3.

9. The micro-shield concrete pipe culvert repairing and reinforcing structure according to claim 4, characterized in that: the concrete layer (4) is formed by pouring epoxy resin concrete.