KR20060109377A - Construction method of drain pipe - Google Patents

Abstract

A pipeline installation method is provided to prevent various defects on a joint by forming one jointless pipeline all over the pipeline, to prevent differential settlement by preventing corrosion and crack formation caused by chemical factors using synthetic resins for the inside of a pipeline, to cut down on freight charges by forming a pipeline in a construction site and to have high extensibility by laying with another utility pipelines while placing concrete. A pipeline installation method comprises the steps of: preparing a manhole and lean concrete for newly installation of a pipeline by pit-excavating a place for laying a pipeline, installing a manhole and placing lean concrete on the bottom for laying a pipeline(10), or, preparing a manhole and lean concrete for improvement of a pipeline by removing the existing pipeline and placing lean concrete on the bottom for laying a pipeline(11); forming a pipeline by drawing out synthetic resin strips wound around a strip feeder and winding spirally(12); installing reinforcements around the pipeline(14); installing a concrete placing form around the reinforcements(16); and completing a pipeline by placing concrete to the form(18).

Description

Construction method of drain pipe

1 is a flow chart showing a pipeline installation method according to an embodiment of the present invention.

Figure 2 is a conceptual diagram illustrating a pipeline installation method according to an embodiment of the present invention.

Figure 3 is a flow chart showing a pipeline installation method according to another preferred embodiment of the present invention.

4 is a conceptual diagram illustrating a pipeline installation method according to another preferred embodiment of the present invention.

5 is a cross-sectional view of the strip used in the pipeline installation method according to an embodiment of the present invention.

Figure 6 is a cross-sectional view of the joiner used in the pipeline installation method according to another embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

20: strip 22: strip tube

24: Tuber 30: Reinforcement

40: concrete 60: joiner

The present invention relates to an installation method, and more particularly to a field installation pipeline installation method.

Most conventional landfill sewage and sewage pipe installation works were made by continuously connecting cast iron pipes or concrete fume pipes with a certain unit length of several tens of meters between manholes and manholes, and laying them underground. . In this case, the pipeline between the upstream manhole and the downstream manhole must be constructed to have a constant gradient so that the fluid can flow smoothly inside the pipeline.

However, in the conventional pipeline installation construction, due to various reasons such as poor construction, floating settlement of the ground, and the action of the upper load, the joint of the unit length of the pipe is dropped, and the fluid inside the pipeline flows into the soil, or underground groundwater, There is a problem that foreign matters such as soil and sand penetrate into the pipeline.

In addition, the settlement of the soil often leads to the collapse of the road is built on top of the pipeline can cause additional damage.

On the other hand, the conventional pipeline installation construction has various problems in the material of the pipeline itself. In the case of cast iron pipes, the damage of the pipeline by corrosion is the biggest problem, and in the case of concrete fume pipes, there are problems such as cracks and water leakage, strength loss, dropout, and corrosion by hydrogen sulfide. In addition, the heavy load of the pipeline itself requires a lot of transportation costs, especially in the case of large diameters, the burden of transportation costs is greater due to its volume.

The prior art related to sewage pipes is Republic of Korea Utility Model Publication No. 94-27128 ('sewage pipe'). However, the present invention relates to the configuration of the unit length of the pipe, when the sewage pipes are constructed by the above design, various defects may occur at the joints, and there is a problem in that the pipe of the unit length is transported to the site for construction.

According to the present invention, it is possible to prevent a defect that may occur in the joint by forming a single pipe line without a joint, and the pipe is made of a material that does not cause corrosion or cracks, so that a pipeline installation method with less need for repair and improvement of the pipe line is required later. To provide.

In addition, the present invention is to significantly reduce the transportation cost by forming a pipeline in the field, it is possible to embed other utility pipelines at the same time in the concrete pouring process to provide a highly scalable pipeline installation method.

According to one aspect of the invention, (a) spirally wound the synthetic resin strip to form a pipeline, (b) installing a reinforcement around the pipeline, (c) installing a concrete casting formwork around the reinforcement And, (d) is provided a pipeline installation method comprising the step of pouring concrete into the formwork.

In addition, there is provided a pipeline installation method comprising (a) spirally winding a strip of synthetic resin having a plurality of protrusions formed on an outer surface thereof, and (b) pouring shotcrete around the pipeline. After step (a) may further comprise the step of installing a wire mesh around the conduit.

Adjacent spirals of the spirally wound strips in step (a) are preferably joined together or joined using a joiner.

Prior to step (a), the trench can be excavated at the location where the sewer pipe is to be buried, the manhole can be installed, and the discarded concrete can be placed at the bottom of the pipeline installation. In addition, before the step (a), the existing pipeline can be demolished, and the discarded concrete can be poured on the bottom of the pipeline installation unit.

Step (a) may be performed by a canister. The tube manufacturing machine includes a moving part, a feeding part for continuously supplying the strip in one direction, a frame part maintaining a cross section corresponding to the end face of the conduit, and a spirally wound strip while being received inside the frame part and pressing the strip toward the frame part. It may include a roller portion that rotates to wind.

In step (a), the conduit is preferably formed so as to connect between the manhole and the manhole. Step (a) may further comprise installing a cylindrical tube of a material capable of containing the fluid in the conduit. The reinforcing material is preferably rebar or shotcrete.

Hereinafter, preferred embodiments of the pipeline installation method according to the present invention will be described in detail with reference to the accompanying drawings, in the following description with reference to the accompanying drawings, the same or corresponding components are given the same reference numerals and duplicated thereto. The description will be omitted.

1 is a flow chart showing a pipeline installation method according to an embodiment of the present invention.

The pipeline installation method of the present invention relates to a construction method for the establishment and improvement of sewage and sewage pipes that are buried and installed in the ground. The pipe pipe connecting the manhole and the manhole can be manufactured on site using a pipe mill and concrete can be poured. It is made by placing concrete after installing formwork by reinforcing it.

The difference between the existing cast iron pipe and the concrete fume pipe embedding method is that there is no joint throughout the pipeline, so it is possible to prevent leakage due to falling off, there is no dropping off due to partial settlement, and corrosion does not occur and utility during concrete pouring Since the pipeline is installed, it can be expanded at no additional cost, and since there is no crack, structural defects are eliminated accordingly, and the flow rate is increased by lowering the roughness coefficient inside the pipeline, and the slope of the pipeline is ensured to smooth the flow. That can be the point.

The present invention relates to the construction and construction of sewage and sewage pipes for underground reclamation, and there is a difference in construction method at the start of construction depending on the case of establishing a pipeline and improving the existing pipeline.

When the pipeline is newly constructed, the trench is dug in the place where the pipeline is to be buried, and after the manhole is installed, cast concrete is placed on the bottom of the portion where the pipeline is to be installed (10) to prepare for the construction of the pipeline. When digging or discarding concrete, the slope of the pipeline should be considered to form the necessary slope.

In the case of improving the pipeline, the existing pipeline is demolished and the discarded concrete is placed on the bottom of the part where the pipeline is to be installed (11) to prepare for the improvement of the pipeline. If necessary, existing manholes can also be demolished. In this case, manholes should be provided at the required part. As in the new construction, when casting concrete, the required draft should be formed in consideration of the draft of the pipeline.

After the manhole and the discarded concrete are prepared for the construction or improvement of the pipeline, the construction is carried out according to the same construction order. First, a strip of synthetic resin wound around a strip feeder is drawn out and spirally wound to form a conduit (12). Although the piping of a strip pipe | tube may be performed by an attractive force, More preferably, it can be carried out by the piping machine dedicated to piping work.

The tube making machine not only serves to form the strip tube with a uniform diameter and uniform gradient, but also functions to ensure that the strip and the strip or the joining of the strip and the joiner are made.

Next, a reinforcement is installed around the pipeline (14). The reinforcing material is integrated by pouring concrete into the strip tube, and it is preferable to reinforce the reinforcing bar by installing it to structurally reinforce the concrete. In this case, the strip pipe is to act as the inner (pipe side) formwork of the sewage pipe made of reinforced concrete. In case of reinforcing bar as reinforcing material, it is possible to secure the structural advantages of reinforced concrete, which improves the load bearing capacity of the pipe.

However, the present invention is not necessarily limited to the reinforcement of the reinforcement as a reinforcing material, and other reinforcing materials such as wire mesh and metal lath may be used within a range apparent to those skilled in the art in consideration of adhesiveness and structural performance between the strip tube and concrete. Of course.

Moreover, shotcrete can also be sprayed and poured into a strip tube as a reinforcement material. In this case, a protrusion such as a rib is preferably formed on the outer surface of the strip tube, and it is also preferable to use it with a reinforcing material such as a wire mesh. In the case of shotcrete is integrally combined with the strip tube serves to improve the bonding strength of the synthetic resin strip tube and concrete. Of course, when the shotcrete is poured, the pipe line installation may be completed without a concrete pouring process, as described below.

Next, install concrete formwork around the reinforcement (16). The form of the formwork can be formed in various ways, such as the square column, polygonal column, tunnel type, columnar shape corresponding to the shape of the pipe. In the case of assembling a conventional unit length pipe, cylindrical pipes have been used in consideration of ease of assembly, but in the case of forming a pipeline by pouring concrete around a strip pipe formed in a cylindrical shape as in the present invention, around a pipe line Depending on the terrain, whether buried and the location of the like can form a variety of pipes.

On the other hand, in the process of pouring concrete when laying various utility pipes at the same time can form a form in a form that can include this. Conventionally, when laying other utilities along with pipelines, formwork and concrete pouring were needed separately, but in the case of the present invention, it can be performed simultaneously with the installation of pipelines, thereby reducing the air and cost.

Next, the concrete is poured into the formwork to complete the pipeline (18). Concrete is filled tightly in the space formed by the reinforcement and formwork, and it is possible to improve flowability by adding admixtures so that the required strength can be exhibited after curing, or to improve adhesion, hardening degree, durability, etc. by adjusting the composition ratio. good.

As described above, in the concrete pouring process, the strip tube serves as a pipeline formwork. Therefore, in order to prevent the plastic strip tube from being deformed or collapsed due to concrete pouring, it is better to install a support such as copper bar in the strip tube.

However, in the case of the pipe line like the present invention, it is difficult to erect a rod-like club, as in general construction work, it is preferable to install a support having a plurality of legs in a radial interval at regular intervals.

However, since the support installed in the pipeline is often difficult to remove after construction, it is more preferable to install a member such as a cylindrical tube made of a material capable of accommodating fluid in the pipeline during the strip tube formation process.

In this case, by forming a strip tube and injecting a fluid such as air or water into the cylindrical tube before placing the concrete on it, the tube can support the inner wall of the strip tube to prevent deformation and collapse of the strip tube due to concrete pouring. have.

2 is a conceptual diagram illustrating a pipeline installation method according to an embodiment of the present invention. Referring to FIG. 2, a manhole 2, a strip feeder 4, a strip 20, a strip tube 22, a canister 24, a reinforcement 30, and a concrete 40 are shown.

The present invention pipe installation method is to dig in the position to install the pipe and install the manhole (2), the connection between the manhole (2) and the manhole (2) by a single strip 20 pipe without joints or couplings . To this end, the strip 20 wound on the strip feeder 4 is unwound in the field and spirally wound to form a conduit.

In this way, because the strip 20 is wound on the site to form a pipeline, if only the strip feeder 4 on which the strip 20 is wound and the canister 24 which winds the strip 20 to form a pipeline are transported to the site, the pipe work is performed. As a result, the transportation cost is significantly reduced compared to the conventional method of forming a pipeline by transporting a unit length pipe to a site.

Since the strip 20 is spirally wound to form a conduit, it is preferable to form the structure of the strip 20 so that the first spiral of the strip 20 and the second spiral adjacent thereto can be coupled. In addition, the outer surface of the strip 20 is preferably added to the projections, such as ribs so that the adhesion to the concrete 40 is improved. This will be described later with reference to FIG. 5.

The inner surface of the strip 20 is preferably adjusted appropriately the coarseness coefficient through a coating or the like to facilitate the flow of the fluid. In addition, the tube is piped so that the gradient of the entire conduit is maintained without the uneven portion so that the fluid does not stagnate in a certain region.

In this way, in order to uniformly form the pipe from the manhole 2 to the manhole 2 so that the pipe maintains a constant gradient, it is preferable to perform the pipe making operation using a canning machine 24 rather than a manpower. The tuber cannot use a tuber used for reinforcing striplining of an existing tube, and it is preferable to use a tuber 24 made exclusively for the installation of a pipe line as the present invention.

Pipe line installation dedicated pipe making machine 24 is of a fixed or movable type, and if the strip is continuously inserted in one direction, a strip tube having an accurate diameter can be continuously manufactured by assembling the inserted strip spirally using a device such as a roller. Will be.

The tube making machine that functions as described above has a moving part which can move while winding the strip spirally, a feeding part for continuously feeding the strip from the strip feeder, a frame part which maintains a frame of a cross section corresponding to the cross section of the strip tube, And a roller portion accommodated inside the frame portion and having a plurality of arms to rotate the spirally while pressing the strip toward the frame by the arm.

The moving part may be controlled to move automatically according to the forming speed of the strip tube, and in some cases, may be manually moved with a moving means such as a wheel.

The roller portion is composed of a plurality of arms, and the plurality of arms rotate to wind the strip spirally. At this time, the end of the arm is preferably provided with an elastic means such as a spring, a pneumatic cylinder to press outward.

Since the strip tube forming process according to the present invention is a process of forming the conduit for the first time, an outer shape holding the frame of the conduit is required to form the strip tube while the roller portion presses the strip to the outside. Therefore, it is preferable that the tube making machine used in the pipeline installation work according to the present invention further includes a frame portion for maintaining the cross section of the pipeline.

The size and shape of the cross section of the conduit maintained by the frame part may be changed to form a conduit of various sizes and shapes. The size and shape of the frame part of the tube making machine, the pressing force and rotational speed of the roller part, the feeding speed of the feeder part, the moving speed of the moving part, and the like should be controlled in conjunction with each other, which is preferably controlled by an automatic control unit having a central processing unit. .

Figure 3 is a flow chart showing a pipeline installation method according to another preferred embodiment of the present invention.

This embodiment omits formwork and concrete pouring process, and relates to a method for installing a pipeline by spraying and pouring shotcrete immediately after forming a strip tube. In this case, the outer surface of the strip tube is preferably formed with a plurality of projections in order to improve the bonding force with the shotcrete.

That is, a spiral pipe is formed by spirally winding a synthetic resin strip having a plurality of protrusions such as T-shaped ribs on an outer surface thereof (12a), and shotcrete is placed directly around the strip pipe to install a pipeline (16a). . The strip tube is preferably formed by the above-described tube making machine, and ribs formed on the outer surface of the strip tube will be described later.

In this way, in the case of installing the pipe, the effect of shortening the air and reducing transportation costs is further improved. On the other hand, in order to further improve the bonding force between the strip tube and the shotcrete, and to prevent cracking of the shotcrete, it is preferable to install a wire mesh around the strip tube (14a).

Wire mesh also serves to reinforce the structural performance, but mainly to prevent cracking of shotcrete, so it can be installed by winding it around the strip tube. Of course, the ribs formed on the outer surface of the strip tube or the spacers used separately may ensure that the wire mesh is prevented from adhering to the strip, thereby securing a crack prevention effect.

4 is a conceptual diagram illustrating a pipeline installation method according to another preferred embodiment of the present invention. Referring to FIG. 4, a manhole 2, a strip feeder 4, a strip 20, a strip tube 22, a canister 24, a wire mesh 30a and a shotcrete 40a are shown.

In the case of the embodiment described in Figure 2 to install the reinforcement 30 after completing the installation of the strip tube 22 to install the pipeline, and install the formwork after the installation of the reinforcement 30 is completed and cast concrete 40 Construction is in order.

However, the present invention does not necessarily have to perform the following process after one process is completed as described above, while installing the reinforcing material 30 before the tube is completed, while manufacturing the strip tube 22 as necessary, As long as the reinforcing material 30 is installed, the concrete 40 may be poured in a manner of pouring.

In particular, when the distance between the manhole (2) and the manhole (2) is long, if the following work is undertaken before the preceding work is completed through proper process management, the overall pipeline installation work is shortened. In this case, process management such as critical path method (CPM), which manages the process, transportation plan, manpower allocation, budget, etc. of the entire construction, is required by catching the process that has the shortest time for construction as a critical path. Self-explanatory

In this embodiment, the wire mesh 30a was installed as the reinforcing material 30, and shotcrete 40a was poured around the wire mesh 30a. As described above, in order to improve the bonding force between the shotcrete 40a and the strip tube 22 and to facilitate the installation of the wire mesh 30a, it is preferable to form a plurality of protrusions on the outer surface of the strip 20. .

5 is a cross-sectional view of the strip used in the pipeline installation method according to another preferred embodiment of the present invention. Referring to FIG. 5, strip 20, rib 52 is shown.

Strip 20 according to this embodiment is a synthetic resin having a cross-section as shown in Figure 5, that is, a material in the form of a strip of hard or soft vinyl chloride, the back of the rigidity and to increase the binding force with the concrete 40 T It is preferable that the rib-shaped 52 is formed in a protruding structure.

The cross-sectional shape of the rib may be a T-shaped skeleton, and the vertical portion of the T may be formed in a trapezoidal shape. As such, by increasing the width of the rib supporting portion, the supporting force of the rib is improved, and the number of ribs can be reduced in the strip 20 as a whole.

In the case of FIG. 5, eight ribs are formed. However, when the width of the vertical portion of the T-shaped portion is widened as described above, the same supporting force may be ensured even with seven or less ribs. In this way, while reducing the number of ribs while maintaining the same support force, as well as saving the material can be better combined with the concrete 40, the workability is improved.

In addition, in the T-shaped cross section of the rib, stepped portions may be formed at both ends of the horizontal portion. In other words, when the stepped portion is formed as a 'serif' in the font, the binding force on the concrete 40 of the rib is improved, thereby improving the workability and structural performance.

Both ends of the strip 20 has a structure that can be joined to the joiner, the strip 20 and the joiner are combined to be wound continuously in a spiral to form a tube (pipe).

However, when the strip 20 according to the present invention is wound in a spiral, adjacent spirals are not necessarily coupled to each other by a joiner, and one end and the other end of the strip 20 are formed to be coupled to each other. Adjacent helixes of the strips 20 may be directly coupled to each other without a joiner within a range apparent to those skilled in the art.

In this case, one end of the cross section of the strip 20 is formed as shown in Figure 5, the other end is preferably formed as the end of the joiner of FIG. Of course, in order to ensure exponentiality, it is preferable to interpose a seal member at one end or the other end of the strip 20.

6 is a cross-sectional view of a joiner used in a pipeline installation method according to another preferred embodiment of the present invention. Referring to FIG. 6, a strip 20, a joiner 60, and a seal material 62 are shown.

The joiner 60, which is a suture of the strip 20, is divided into two types: a standard joiner 60 made of hard vinyl chloride and a flexible joiner which is a composite of hard and soft vinyl chloride used in steps, bends, and bends. Both the standard joiner 60 and the flexible joiner reliably seal the strip 20 by a special lock function, and a rubber or silicone seal at the part where the joiner 60 and the strip 20 are coupled to each other. The index 62 can be secured through the ash 62.

Although the technical spirit of the present invention has been described in detail with reference to the above-described embodiments, the above-described embodiments are for the purpose of description and not of limitation, and those skilled in the art of the present invention will appreciate the technical spirit of the present invention. It will be understood that various embodiments are possible within the scope of the invention.

According to the present invention as described above, it is possible to prevent a variety of defects that may occur in the joint by forming a single pipe without a joint throughout the pipe, and because of the synthetic material as the inner material of the pipe to prevent corrosion and cracking due to chemical factors It can be completely blocked to prevent floating settlement, thereby reducing the need for further repair and improvement of the pipeline.

In addition, according to the present invention improves the coarseness coefficient of the synthetic resin used as the inner material of the pipeline to facilitate the fluid flow inside, it is possible to prevent the accumulation of sediment in the pipeline, and to form a single pipeline as a whole of the pipeline Gradient adjustment is easy.

In addition, according to the present invention, since the pipeline is manufactured directly in the field, the transportation cost of carrying the unit length of the tubular body is greatly reduced, thereby greatly reducing the use of heavy equipment. On the other hand, in the process of placing concrete on the outside of the synthetic resin pipeline in the field can be buried at the same time various utility pipelines have excellent expandability.

Claims (12)

(a) spirally winding a strip of synthetic resin to form a conduit; (b) installing a reinforcement around the duct; (c) installing concrete formwork around the reinforcement; And (d) a pipeline installation method comprising the step of pouring concrete into the formwork. (a) spirally winding a strip of synthetic resin having a plurality of protrusions formed on an outer surface thereof to form a conduit; (b) a pipeline installation method comprising the step of pouring shotcrete around the pipeline. The method of claim 2, After the step (a) further comprising the step of installing a wire mesh around the pipeline. The method according to any one of claims 1 to 3, A pipeline installation method in which adjacent spirals of the strip spirally wound in step (a) are joined to each other. The method according to any one of claims 1 to 3, Adjacent spirals of the strip wound spirally in the step (a) are joined using a joiner. The method according to any one of claims 1 to 3, The pipe installation method further comprises the step of digging in a position to bury the sewage pipe before the step (a), installing a manhole, and placing the discarded concrete on the bottom of the pipeline installation portion. The method according to any one of claims 1 to 3, Pipe line installation method further comprising the step of removing the existing pipeline prior to the step (a), and casting the discarded concrete on the bottom of the pipeline installation unit. The method according to any one of claims 1 to 3, The step (a) is a pipeline installation method carried out by a pipe mill. The method according to claim 8, wherein the pipe mill, A moving part; A feeding part for continuously feeding the strip in one direction; A frame portion for maintaining a cross section corresponding to the cross section of the conduit; And a roller part accommodated in the frame part to rotate the strip in a spiral manner while pressing the strip toward the frame part. The method according to any one of claims 1 to 3, The pipe installation method of the step (a) in the pipeline is formed so as to connect between the manhole and the manhole. The method according to any one of claims 1 to 3, Said step (a) further comprises installing a cylindrical tube of a material that can accommodate the fluid in the pipeline. The method of claim 1, The reinforcing material is reinforcement or shotcrete pipe installation method.

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