阅读说明：本技术 一种大直径hdpe管道水下修补方法 (Underwater repairing method for large-diameter HDPE pipeline ) 是由 曾凡 薛林虎 陈猛 张俊 冯振周 马亿光明 许云飞 吴凯 刘凯 胡汉卿 于 2020-05-19 设计创作，主要内容包括：本发明公开了一种大直径HDPE管道水下修补方法,利用半圆形夹箍配合混凝土包封的方式,将橡胶板固定至待修补管道处,并用橡胶布缠绕管道,进行止水,进行管道水下修补,不需要安装额外的管道,操作难度小,修补性能高,经济性较好,适用于大直径HDPE管道水下修补。此发明用于港口工程、交通工程、水利工程、公路工程领域。(The invention discloses an underwater repairing method for a large-diameter HDPE pipeline, which is characterized in that a semicircular clamp is matched with a concrete encapsulation mode to fix a rubber plate to a pipeline to be repaired, rubber cloth is wound on the pipeline to stop water, and the pipeline is repaired underwater. The invention is used in the fields of port engineering, traffic engineering, hydraulic engineering and highway engineering.)

1. An underwater repairing method for a large-diameter HDPE pipeline is characterized by comprising the following steps:

s1: adding an additional temporary balancing weight, and then removing the balancing weight of the pipeline to be repaired;

s2: grinding and cleaning the surface of the broken section of the pipeline to be repaired;

s3: fixing a rubber plate to the position of the pipeline to be repaired, winding the pipeline by using rubber cloth, and completely covering the fractured joint;

s4: respectively installing semicircular clamping hoops at the top and the bottom of the broken joint of the pipeline to be repaired;

s5: installing a reinforcement cage, then installing a template, and pouring concrete;

s6: after the concrete strength is met, the formwork is kept in place and the finished pipe is backfilled.

2. The underwater repair method of a large-diameter HDPE pipe according to claim 1, wherein: in step S1, the temporary weight blocks are concrete blocks, the temporary weight blocks are placed on both sides of the pipeline to be repaired, and the two temporary weight blocks are connected by using hanging strips.

3. The underwater repair method of a large-diameter HDPE pipe according to claim 1, wherein: in step S1, the counter weight of the pipeline to be repaired is removed by using the harness in cooperation with the crawler crane.

4. The underwater repair method of a large-diameter HDPE pipe according to claim 1, wherein: in step S3, the rubber plate is composed of two semicircular rubber plates, and the overlapping length of the two semicircular rubber plates is not less than 1/6 times of the inner diameter of the pipeline.

5. The underwater repair method for large-diameter HDPE pipe according to claim 4, wherein: the semicircular rubber plates are connected by adopting clamps or soft ropes.

6. The underwater repair method of a large-diameter HDPE pipe according to claim 1, wherein: in step S4, the semicircular clamps are fastened to flanges at both ends of the pipe section by bolts.

7. The underwater repair method of a large-diameter HDPE pipe according to claim 1, wherein: in step S5, the reinforcement cage includes a top reinforcement cage and a top reinforcement cage, and both the transverse and longitudinal reinforcement barbs at the bottom of the reinforcement cage are disposed downward.

8. The underwater repair method of a large-diameter HDPE pipe according to claim 7, wherein: the template comprises top template and bottom template, the top template side opening, top template size and pipeline size match, the bottom template inserts the pipeline bottom of waiting to mend, top template and bottom template adopt bolted connection.

9. The underwater repair method of a large-diameter HDPE pipe according to claim 1, wherein: in step S5, ballast blocks are set on top of the formwork.

10. The underwater repair method of a large-diameter HDPE pipe according to claim 1, wherein: in step S5, the bottom of the form is provided with a plastic plate that isolates the sealed concrete from the seabed sand.

Technical Field

The invention relates to the fields of port engineering, traffic engineering, hydraulic engineering, highway engineering and the like, in particular to an underwater repairing method for a large-diameter HDPE pipeline.

Background

High-density polyethylene pipes (hereinafter referred to as HDPE pipes) are widely used in various fields such as water supply systems, water diversion systems, drainage systems, fuel gas delivery and the like. After the underwater installation of the large-diameter HDPE pipe is completed, the joint of the pipe sections can be damaged due to certain force inefficacy factors. If the traditional process such as underwater cutting and then patching is adopted, not only the construction process is complex, but also the production cost of pipes and the like is wasted. With the development of economy, the application of large-diameter HDPE pipelines is necessarily wider, and therefore, a method suitable for underwater repair of large-diameter HDPE pipelines needs to be developed, so that economic loss is reduced, and the functionality of the pipeline sections can be ensured.

Disclosure of Invention

In order to solve the problem of underwater repair of large-diameter high-density polyethylene pipelines in the prior art, the invention provides the underwater repair method of the large-diameter HDPE pipelines, which is easy to operate, high in safety coefficient and good in economical efficiency.

The technical scheme adopted by the invention is as follows:

the underwater repairing method for the large-diameter HDPE pipeline comprises the following steps:

s1: adding an additional temporary balancing weight, and then removing the balancing weight of the pipeline to be repaired;

s2: grinding and cleaning the surface of the broken section of the pipeline to be repaired;

s3: fixing a rubber plate to the position of the pipeline to be repaired, winding the pipeline by using rubber cloth, and completely covering the fractured joint;

s4: respectively installing semicircular clamping hoops at the top and the bottom of the broken joint of the pipeline to be repaired;

s5: installing a reinforcement cage, then installing a template, and pouring concrete;

s6: after the concrete strength is met, the formwork is kept in place and the finished pipe is backfilled.

As a further improvement of the technical scheme of the present invention, in step S1, the temporary weight blocks are concrete blocks, the temporary weight blocks are placed on two sides of the pipeline to be repaired, and the two temporary weight blocks are connected by using a hanging strip.

As a further improvement of the technical solution of the present invention, in step S1, the weight of the pipeline to be repaired is removed by using the sling in cooperation with the crawler crane.

As a further improvement of the technical solution of the present invention, in step S3, the rubber plate is composed of two semicircular rubber plates, and the overlapping length of the two semicircular rubber plates is not less than 1/6 times of the inner diameter of the pipe.

Further as an improvement of the technical scheme of the invention, the semicircular rubber plates are connected by adopting clamps or soft ropes.

As a further improvement of the technical solution of the present invention, in step S4, the two semicircular clamps are fastened to flanges at two ends of the pipe section by bolts.

As a further improvement of the technical solution of the present invention, in step S5, the reinforcement cage includes a top reinforcement cage and a top reinforcement cage, and both the transverse and longitudinal reinforcement barbs at the bottom of the reinforcement cage are disposed downward.

The technical scheme is further improved, the template comprises a top template and a bottom template, the side surface of the top template is provided with an opening, the size of the top template is matched with that of the pipeline, the bottom template is inserted into the bottom of the pipeline to be repaired, and the top template is connected with the bottom template through bolts.

As a further improvement of the technical solution of the present invention, in step S5, a plurality of ballast blocks are disposed on the top of the formwork.

As a further improvement of the technical solution of the present invention, in step S5, a plastic plate is disposed at the bottom of the formwork, and the plastic plate isolates the sealed concrete from the seabed sand.

The invention has the beneficial effects that: according to the underwater repairing method for the large-diameter HDPE pipeline, the semicircular clamping hoop is matched with the concrete to seal, the rubber plate is fixed to the position of the pipeline to be repaired, the pipeline is wound by the rubber cloth to stop water, the pipeline is repaired underwater, the extra pipeline does not need to be installed, the operation difficulty is small, the repairing performance is high, the economical efficiency is good, and the underwater repairing method is suitable for underwater repairing of the large-diameter HDPE pipeline.

Drawings

The invention will be further described with reference to the accompanying drawings in which:

FIG. 1 is a plan view of an overall arrangement of an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of an exemplary embodiment of the present invention;

FIG. 3 is a schematic view of a top form installation according to an embodiment of the present invention;

fig. 4 is a schematic view of the installation of the bottom form according to the embodiment of the present invention.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.