CN213333064U - Damaged restoration structure of large-scale pipeline under pressure - Google Patents

Abstract

The utility model provides a large-scale pressure pipeline damaged repair structure, which comprises a damaged hole at the bottom of a pipe, an overhaul opening arranged on a damaged section pipeline and a lining steel lantern ring which is arranged in the damaged section pipeline and is attached and supported on the inner wall of the pipeline; the overhaul opening and the damaged hole are plugged by filling and pouring micro-expansion fine stone concrete; the outer side of the pipeline where the maintenance opening is located is also provided with a micro-expansion fine stone concrete outer package, and the damaged cave mouth wall is subjected to scabbling treatment; and the soil body below the damaged opening is provided with micro-expansion cement mortar for plugging and reinforcing. The technical scheme breakthroughly adopts the prefabricated folding steel ring to repair, combines the local excavation and the pipeline non-excavation repair technology, effectively improves the operation efficiency, has short repair time and destructive bottom surface, and has good economic benefit.

Description

Damaged restoration structure of large-scale pipeline under pressure

Technical Field

The utility model relates to an underground pressure pipeline defect repair technical field, concretely relates to damaged restoration structure of large-scale sewage pressure pipeline.

Background

In recent years, more and more drainage pipelines in China are close to the service life, serious leakage, corrosion, silting and other diseases exist, part of pipelines are damaged by geological drilling, accidents such as pipeline bursting, ground collapse and the like occur frequently, and urban underground pipe networks, namely 'underground lifelines', are extremely fragile. However, in the face of heavy traffic in cities, construction of complicated underground pipelines and surrounding structures (buildings), the traditional zipper-type excavation and reconstruction method is high in implementation difficulty, low in efficiency and large in social influence, and is gradually eliminated. Trenchless pipe rehabilitation technology began to be used and matured in the uk as early as the seventies of the nineteenth century. Since the end of the last century, in China, after an in-situ curing method is introduced, various pipeline trenchless repair and update technologies such as a stainless steel sleeve method, an alternate method, a broken (split) pipe method, a folding lining method, a spiral winding method and the like are widely applied. However, these techniques are often implemented by means of a status quo inspection well, and therefore their development in the defect repair of sewage pressure pipes is restricted. Obviously, if the current mature trenchless repairing process can be combined, the sewage pressure pipeline with the defect of large pipe diameter (greater than or equal to DN 1000) can be repaired by adopting a quick method of local excavation in a small range, and the method has higher economic value and good social benefit.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the shortcoming that exists among the prior art, provide one kind when the leakage loss appears by the destruction of geology drilling in major diameter sewage pressure pipeline, be applicable to the damaged restoration structure of pipeline that local excavation combines non-excavation restoration technique.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

a large-scale pressure pipeline damaged repair structure comprises a pipe bottom damaged hole, an overhaul opening arranged on a damaged section pipeline and a lining steel lantern ring which is arranged in the damaged section pipeline and is attached to and supported on the inner wall of the pipeline; the overhaul opening and the damaged hole are plugged by filling and pouring micro-expansion fine stone concrete; the outer side of the pipeline where the maintenance opening is located is also provided with a micro-expansion fine stone concrete outer package, and the damaged cave mouth wall is subjected to scabbling treatment; and the soil body below the damaged opening is provided with micro-expansion cement mortar for plugging and reinforcing.

Further, the lining steel collar comprises a plurality of prefabricated folding steel rings which are fixed in parallel along the axial direction of the pipeline.

Furthermore, a modified epoxy resin adhesive is filled between the prefabricated folding steel ring and the inner wall of the pipeline.

Further, the prefabricated folding steel ring comprises two 60-degree arc plates and four 30-degree arc plates; the arc plates are sequentially connected end to end in a rotatable manner to form a ring shape; the 60 arc plates are in diagonal positions opposite to each other.

Furthermore, both sides of the prefabricated folding steel ring are provided with water stop rubber rings.

Furthermore, the prefabricated folding steel rings are fixed in a butt joint mode through the clamping hoop.

Furthermore, the inner and outer comparative surfaces of the prefabricated folding steel ring are coated with a plurality of layers of epoxy coal pitch for anti-corrosion treatment, and the total thickness of a dry film is not less than 0.2 mm.

Furthermore, a manhole and a vent hole are reserved on the lining steel lantern ring corresponding to the overhaul opening; the ventilation hole is provided with a steel plate welding plug and an anchor bar for anchoring, and the manhole is provided with a steel blind flange plug.

Furthermore, the number of the maintenance openings is 2, the maintenance openings are respectively a main opening and an auxiliary opening, and the opening area of the main opening is larger than that of the auxiliary opening.

Furthermore, the anchor bars are 250mm long, and the spacing between the anchor bars is 200 mm.

The utility model has the advantages that:

(1) the utility model discloses a pipeline is broken to calculate and is restoreed the structure, is the technical scheme who has adopted local excavation to combine together with pipeline non-excavation restoration technique, not only can avoid the influence of "division of thorax and breaking tripe" formula excavation to urban traffic, surrounding environment and resident's life effectively, and relatively complete non-excavation restoration mode has advantages such as comprehensive cost is low, construction cycle is short and social is high;

(2) the utility model discloses breakthroughly adopt prefabricated foldable steel ring to restore, only need pull this steel ring into the pipeline and wait to restore the defective position during restoration, adopt the jack to jack up the steel ring, make former foldable steel ring expand rapidly for the ring shape shore in the pipeline inner wall, avoided welding in the pipeline, the construction is swift, has effectively improved the restoration efficiency of the interior defect of sewage pipe;

(3) the hoops between the steel rings are butted, so that the structural stability of the lining steel lantern ring can be ensured; and meanwhile, the rubber water stop ring is arranged, so that good seepage-proofing performance can be ensured, and the service life of the repaired pipeline is prolonged.

Drawings

Fig. 1 is a schematic view of the pipeline of the present invention.

Fig. 2 is a repair cross-sectional view of the present invention.

Figure 3 is the utility model discloses overhaul the plane schematic diagram of opening part.

Fig. 4 is a cross-sectional view of the steel ring of the present invention when folded.

Fig. 5 is a cross-sectional view of the steel ring of the present invention when it is unfolded.

Fig. 6 is a schematic structural view of the clamp of the present invention.

Fig. 7 is a schematic view of the welding and plugging of the ventilation opening of the steel ring of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

Reference is made to the accompanying drawings. The technical scheme of the utility model the damaged restoration of large-scale pressure pipeline mainly is applicable to, including the damaged entrance to a cave 3 of socle, set up maintenance opening 2 on damaged section pipeline 1 and set up in damaged section pipeline 1 and laminating shore in the interior lining steel lantern ring 6 of 1 inner wall of pipeline. The service opening 2 includes a main opening 20 and an auxiliary opening 21, and is generally opened by using a pick, a cutter, and the like. The reason for arranging the two openings is that the main opening 20 is used for arranging the air blower at the early stage of repair, the secondary opening 21 is used for arranging the induced draft fan, and the size of the main opening 20 is 1.2m multiplied by 0.8m and is mainly used for pumping and dredging in a pipeline after opening; the size of the secondary opening 21 is 0.6m in diameter, which facilitates gas detection and dredging during construction. Specifically, the overhaul opening 2 and the damaged opening 3 are plugged by filling and pouring C40 micro-expansion fine-stone concrete 4, and the wall of the damaged opening 3 is roughened. In particular, the outer side of the pipeline where the overhaul opening 2 is located is also provided with a C40 micro-expansion fine-stone concrete outer package, so that the reliability of plugging is ensured. And M20 micro-expansion cement mortar 5 is arranged on the soil body below the damaged opening for plugging and reinforcing, so that the structure reliability is ensured.

The lining steel collar 6 in this solution comprises a plurality of prefabricated steel folding rings 7 fixed side by side in the axial direction of the pipeline. A manhole and a vent hole are reserved on the lining steel collar 6 corresponding to the overhaul opening, and the diameter is preferably 600 mm. Specifically, the prefabricated folding steel ring 7 comprises two circumferential 60-degree arc plates 70 and four circumferential 30-degree arc plates 71. The arc plates 70 and 71 are sequentially connected end to end in an annular shape according to the sequence of the arc plates 70 and 71 of 60 degrees, the arc plates 71 and 71 of 30 degrees, and the joints are all in rotatable connection. Therefore, when the prefabricated folding steel ring 7 is folded, the connecting part of the two 30-degree arc-shaped plates at the two sides is retracted to the center of the steel ring, so that the whole steel ring is flat. When repairing, the prefabricated folding steel ring 7 is pulled into the defect position and the prefabricated folding steel ring 7 is jacked in the pipeline by a jack, so that the original prefabricated folding steel ring 7 can be rapidly unfolded into a circular ring shape, and the use is convenient and flexible.

In order to ensure the sealing performance and the seepage-proofing performance of repair, a modified epoxy resin adhesive 8 is poured between the prefabricated folding steel ring 7 and the inner wall of the pipeline 1, and water-stopping rubber rings 9 are arranged on two sides of the prefabricated folding steel ring 7. The prefabricated folding steel rings 7 are axially fixed in a butt joint mode through the clamping hoop 10, so that the lining steel lantern ring 6 has good structural stability and seepage-proofing performance. The clamp in this embodiment is 50cm long. And polishing welding beading, welding scars and welding slag in the pipeline by using a polishing machine, and then performing anticorrosive treatment. The inner lining steel lantern ring 6 is internally and externally anticorrosive, epoxy coal pitch is adopted for coating according to the sequence of primer-finish paint-primer-finish paint, and the total thickness of a dry film is not less than 0.2 mm.

Particularly, the ventilation holes in the lining steel lantern ring 6 are provided with steel plates 11 which are welded and blocked, and anchor bars 12 are anchored, the length of each anchor bar 12 is preferably 250mm, and the distance between every two anchor bars is preferably 200 mm; the manhole is provided with a steel blind flange plug.

It should be noted that the above describes exemplifying embodiments of the invention. However, it should be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, which are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the scope of the present invention, and the changes and modifications are intended to fall within the scope of the present invention as claimed.

Claims (9)

1. A large-scale pressure pipeline damaged repair structure is characterized by comprising a pipe bottom damaged hole, an overhaul opening arranged on a damaged section of pipeline and a lining steel lantern ring which is arranged in the damaged section of pipeline and is attached to and supported on the inner wall of the pipeline; the overhaul opening and the damaged hole are plugged by filling and pouring micro-expansion fine stone concrete; the outer side of the pipeline where the overhaul opening is located is also provided with a micro-expansion fine stone concrete outer package, and the damaged cave wall is subjected to scabbling treatment; and the soil body below the damaged opening is provided with micro-expansion cement mortar for plugging and reinforcing.

2. A large scale pipeline under pressure failure repair arrangement as claimed in claim 1, wherein said liner steel collar comprises a plurality of prefabricated steel accordion rings secured side-by-side along the axial direction of said pipeline.

3. A repair structure for large scale pressure pipe breakage as claimed in claim 2, wherein a modified epoxy resin adhesive is injected between said prefabricated folding steel ring and said pipe inner wall.

4. A large scale pipeline under pressure damage repair construction as claimed in claim 2, wherein said prefabricated folding steel ring comprises two 60 ° arc plates and four 30 ° arc plates; the arc plates are sequentially connected end to end in a rotatable manner to form a ring shape; the 60 arc plates are in diagonal positions opposite to each other.

5. A large scale pipeline under pressure damaged repair structure as claimed in claim 2, wherein said prefabricated folding steel ring is provided with water stop rubber rings at both sides.

6. A large scale pipeline under pressure damage repair construction as claimed in claim 2, wherein said prefabricated folding steel rings are fixed in abutting relation by means of clips.

7. A large-scale pressure pipeline damage repairing structure as claimed in claim 1, wherein a manhole and a vent hole are reserved corresponding to the lining steel collar at the overhaul opening; the ventilation hole is equipped with steel sheet welding shutoff and anchor bar anchor, the manhole sets up the shutoff of steel blind flange.

8. A large-sized pipeline under pressure damage repair structure as claimed in claim 1, wherein said service openings are 2, which are a main opening and a sub opening, respectively, and the opening area of said main opening is larger than that of said sub opening.

9. A large scale pipeline under pressure damaged repair structure as claimed in claim 7, wherein the anchor bars are 250mm long and 200mm apart.

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