KR101524272B1 - A repairing assembled structure precast-manhole and constructing method it - Google Patents

Abstract

The present invention relates to a field assembly type live line precast manhole for repair and a construction method thereof and, more specifically, to a field assembly type live line precast manhole for repair and a construction method thereof capable of installing the precast manhole in consideration of site conditions, such as the position, direction, and height of obstructions, while preventing the shifting construction, damage, and position deviation of the obstructions, and assembling the precast manhole in the site to be easily installed. The field assembly type live line precast manhole for repair comprises a variable body part (10) which is a foundation of a steel frame and a precast upper plate part (20) coupled to the top of the variable body part (10). A method to construct a field assembly type live line precast manhole for repair comprises: a step of excavating the site (S10); a step of checking the continuous footing and excavation of an installation place (S20); a step of disassembling an existing structure and arranging facilities (S30); a step of constructing a foundation and a new structure (S40); and a step of constructing walls and filling back soils around the walls (S50); a step of installing a cut-off plate and coupling a precast (PC) upper plate (S60); a step of constructing and paving the manhole structure (S70); and a step of removing forms and finishing the construction (S80).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast manhole and a method of constructing the precast manhole,

The present invention relates to a field prefabricated manhole for repairing and a method of constructing the same, and more particularly, it relates to a prefabricated manhole for repairing, and a construction method of the same, which prevents a breakwater buried underground from being broken or displaced without considering a location, To a prefabricated prefabricated prefabricated manhole for repair and to a method of construction thereof.

Generally, a manhole should be installed in a certain area when it is buried underground, sewage pipe, city gas pipe, fire hydrant, district heating pipe, oil pipeline, power line, Among them, manholes for electric power lines are installed at the points where the roads diverge, where the ducts diverge, when the ducts must be bent beyond the allowable curvature, before and after the steep slopes, before and after the long bridges,

When a manhole for a power line is installed underground, a concrete installation method is used to install a manhole mainly in the field. However, the above-mentioned field-borne construction method has a disadvantage in that all the work must be performed in the field, so it is difficult to carry out all the equipment to the site, and the construction period is long and traffic congestion occurs on the site.

On the other hand, the prefabrication method is a method of prefabricating the wall, the upper slab, the bottom floor, etc., and assembling them in the field. It is possible to shorten the construction period compared to the field installation method. However, It is difficult to carry out waterproofing treatment.

The prefabricated construction method is disclosed in Korean Patent Laid-Open No. 10-2001-0023607 (manhole installation method, hereinafter referred to as "Prior Art 1").

In recent years, manholes are used as precast concrete to be used for sewage, sewage, or house improvement to compensate for the disadvantages of on-site construction methods and prefabricated construction methods.

The precast concrete manhole can be thoroughly controlled in quality at the factory, which is advantageous in that the quality is uniform. In addition, the construction period can be shortened at the time of construction, and it is possible to immediately work back after construction, which can minimize traffic congestion and inconvenience of citizens.

However, when such precast manholes are manufactured in a large size, there is a great difficulty in the production of molds and concrete pouring, and in the case of pouring concrete by making the molds integral, it is difficult to produce concrete with a small space for pouring concrete into the molds have. In other words, because there is not enough space to place the concrete, concrete is placed in a limited place. Therefore, the concrete may not reach every corner of the mold. This problem is more serious because of the lack of fluidity in the case of high strength concrete. In addition, when the mold is integrally formed and the concrete is poured, the weight of the concrete is very large, so that it is difficult to apply vibration and the influence of the vibration can not be evenly distributed throughout the product.

On the other hand, the underground manhole can be classified into two types: A type applied to the straight section, B type applied to the 90 ° bending section, C type applied to the bending section of about 45 °, and D type Type 1E applied to the T-type branch point, and 2E type applied to the 4-way branch point.

Of these, a channel is not formed in one wall of the B type or C type underground manhole. Therefore, it is very difficult to form a new channel on the previously installed B-type or C-type manhole, and when the D-type or E-type can not be used because of a problem in the topography or a narrow space, Should be used. Even in such a case, it is also difficult to install the pipeline on the wall side where the piping is not formed.

In order to solve the above problems, there has been developed a technique relating to a precast concrete (commonly referred to as PC) method in which a structure is formed from various functions of cement concrete and then installed in a construction site. Korean Patent Publication No. 10-2001-0078879 (fastening structure of power manhole made of precast concrete, hereinafter referred to as "prior art 2").

Korean Patent Laid-Open No. 10-1995-0024255 (Prevention Technique for Preventing Collapse of Main Girders Occurring When Precast Structure of Composite Girder is Replaced by Precast Structure, hereinafter referred to as Prior Art 3)

Korean Patent Laid-Open No. 10-1999-0044192 (How to install a manhole and its manhole, hereinafter referred to as "Prior Art 4")

However, this conventional technique has a problem that excessive construction period and expense are incurred such as moving the obstacles buried in the underground, and when the construction period becomes longer, the roads must be shut off and construction must be carried out. There is a problem that inconvenience of the user who uses it occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and it is an object of the present invention to provide a method and apparatus for maintaining the function of a facility without being damaged or broken, Which can be shortened, and a method of constructing the pre-cast manhole.

It is still another object of the present invention to provide a field prefabricated prefabricated manhole for repairing which minimizes the obstruction of traffic flow and minimizes the construction cost by minimizing the excavation area and excavation amount at the construction site and a method of construction thereof.

In order to achieve the above-mentioned object, a maintenance prefabricated prefabricated manhole for repairing comprises a movable body 10 as a steel frame foundation and a top plate portion 20 completed by precast joining to the upper end of the movable body 10 The present invention provides a prefabricated prefabricated manhole for a maintenance work.

The variable body portion 10 includes an upper frame 11 for supporting the upper plate portion 20 and a column portion 12 disposed in a direction perpendicular to a corner of the lower end of the upper frame 11, And a lower frame 13 coupled to a lower end of the movable body 12, wherein a plurality of steel members are coupled to each other using a connecting member 30 to form a cubic shape, And an obstacle holding stand 14 for preventing displacement and deflection phenomenon is further provided.

Also, the variable body portion 10 can be extended in a plurality of cubes depending on the situation of the site.

In the construction method using the precast manhole as described above, a construction site disposal step (S10) for removing the road cutting and asphalt removal and the manhole cover and the manhole, which are foundations, according to the size of the construction site requiring repair, (S20) for confirming the location of the obstacle such as the electric wiring and the water supply and drainage facility buried in the basement after the trenching step (S10), the step (S20) (S30), demolishing the structure and demolishing the structures and the installed structures in the construction site and arranging the work easily, after the demolition of the structure and arranging the facilities (S30) A base and structure construction step (S40) in which the variable-shape body portion 10 is repaired in situ or the variable-shape body portion 10 manufactured in the field is installed on a construction site ), A step of constructing a wall of the flexible body 10 installed after the foundation and structure construction step (S40), a step of installing a reinforcing steel for a wall and a formwork, and a step of curing and backfilling (S50), installing a waterproofing plate on the upper end of the flexible body 10 after the wall construction and backfilling step (S50), attaching a pre-casted upper plate 20 to the upper plate, After the step of installing the water level plate and PC top plate (S60), a structure such as a manhole cover is constructed, and a manhole structure construction and packaging step (S70) for packing the road surface is performed, and a mold for a wall is removed, And a finishing step (S80). ≪ IMAGE >

Here, in the step S20 of confirming the installation location of the installation site, in order to determine the actual installation location and range of the obstacle such as the electric wiring and the water supply and drainage facilities buried under the construction site, In addition, in the foundation and structure construction step (S40), a foundation PC block is installed in a place where the column portion 12 of the variable-shape body portion 10 is to be placed at the construction site, Or the concrete is poured directly without installing the base PC block. In the step of constructing and backing the wall, the wall is constructed in the variable body portion 10, and then steam is supplied or a heating device using microwave is used And curing.

And the steam to be supplied to the wall is maintained at a temperature of 65 ° C to 75 ° C. The object of the present invention can be achieved by providing a method of constructing a prefabricated manhole for maintenance work.

The present invention provides a pre-cast manhole for repairing a live precast casting manhole and a method of construction thereof, which can prevent the obstacles buried in the underground in the longitudinal direction and the transverse direction from damaging the obstacle in consideration of the location, It is possible to construct without disruption, without damaging or dislocating the obstacle, to keep the use function of the facility uninterrupted, to be easy to construct, to shorten the process time due to continuous operation, It is possible to minimize the obstacle of traffic and reduce the cost.

Also, even if the size of the manhole needs to be enlarged according to the manhole standard and site conditions, the connecting member can be easily fixedly connected to the body portion constituting the prefabricated prefabricated manhole for repairing by the bolt and nut, There are advantages.

1 is a perspective view of a field prefabricated live precast manhole for repair of the present invention.
2 is an exploded perspective view of a field prefabricated live precast manhole for repair of the present invention.
3 is a perspective view of a variable body portion of a field prefabricated live precast manhole for repair of the present invention.
4 is a view showing an embodiment of a variable-type body portion of a field prefabricated live precast manhole for repairing the present invention.
FIG. 5 is a flowchart of a method of constructing a live pre-cast manhole for repair in the present invention.
6 is a view illustrating the installation of a field prefabricated live precast manhole for repairing the present invention.

Hereinafter, persons skilled in the art will be described with reference to the drawings so as to easily carry out the field prefabricated prefabricated manhole for repair and the method of construction thereof according to the present invention.

FIG. 1 is a perspective view of a live pre-cast manhole for repairing the present invention, FIG. 2 is an exploded perspective view of a field prefabricated live pre-cast manhole for repair of the present invention, and FIG. 3 is a perspective view of a movable pre- FIG. 4 is a view showing an embodiment of a body part of a field prefabricated live pre-cast manhole for repairing the present invention. FIG.

1 to 4, a maintenance prefabricated live precast casting manhole comprises a variable-type body portion 10 serving as a steel-frame foundation and a precast upper plate portion 10 jointed at the top of the variable- (20).

The variable body portion 10 includes an upper frame 11 for supporting the upper plate portion 20 and a column portion 12 provided in a direction perpendicular to an edge of the lower end portion of the upper frame 11, And a lower frame 13 coupled to a lower end of the lower frame 13.

The upper plate portion 20 coupled to the upper portion of the variable body portion 10 at the site is formed by mixing the reinforcing bars, concrete, and steel material, and the holes 21 are formed at the center portion.

The upper plate 20 is manufactured by using the precast method, and is then coupled to the variable-shape body 10 at the construction site.

The variable body portion 10 is further provided with a supporting device 14 which can be supported to prevent the supporting device embedded in the underground from being detached from the installation position during the operation process.

At this time, the supporting device 14 is horizontally disposed between the pillars 12 of the variable-type body 10. More specifically, the pillars 12 and the pillars 12, which are adjacent to the pillars, And each of the ends of the barrier cage 14 is formed between the other pillars.

Such an obstacle cradle 14 can be selected depending on the number of obstacles installed on the site.

The variable-shape body 10 may have various cross-sectional shapes (for example, a curved shape, a curved shape, a curved shape, a curved shape, a curved shape, H, I, and the like) are combined with each other. (In the drawings of the present invention, for the sake of better understanding, it is shown in an H-sectional shape, but it is not limited thereto.)

The structure of the variable body portion 10 will be described in more detail. An upper frame 11 is formed by connecting end portions of four steel members to form a rectangular shape. Four columnar members are vertically fixedly coupled to each other at the corners to form the columns 12 and the lower ends of the four pillars 12 are formed in the same shape as the upper frame 11 in the lower direction of the columns 12, And the lower frame 13, which is formed in a rectangular shape, is connected and completed.

In this case, the variable-shape body 10 can be modified into various shapes according to the field conditions. In order to describe the preferred embodiment of the present invention, one cube shape is used as a reference, but the present invention is not limited thereto.

This is because additional modifications can be made on site depending on the arrangement and number of obstacles at the construction site.

The shape of the upper frame 11 and the lower frame 13 can be deformed as long as the shape of the upper frame 11 and the lower frame 13 has a polygonal shape such as a square angle, a rectangle, a trapezoid, a pentagon, a hexagon, It can be installed at the corner where the angle is formed according to the shape of the upper frame 11 and the lower frame 13.

In addition, when the cube is formed by using the steel frame member, the variable body portion 10 formed by joining the plurality of steel column members is coupled using the connecting member 30 between the steel frame members.

The connecting member 30 is provided in various shapes such as "a", "a", "b", and "c" And the bolts and nuts are fixedly coupled.

Further, even when the size of the variable-shape body part 10 is to be enlarged according to the site conditions, it can be extended easily between one steel member of the variable-type body part 10 and the steel member to be extended. Reference)

Such steel members and connecting members may be combined with welding methods depending on the field conditions.

The upper plate portion 20 coupled to the upper side of the variable body portion 10 as described above can be moved into and out of the inside of the manhole for work by the operator at the construction site, 21, and is engaged with the variable body portion 10 in the field.

At this time, the variable body portion 10 and the upper plate portion 20 are joined together in the field by using a coupling member such as a fastening bolt, and a watertight seal is formed between the flexible body portion 10 and the upper plate portion 20 And a water expansion plate (not shown) to serve as a buffer.

This reduces the construction errors of the formed upper plate portion 20 and the deformable body portion 10 by precasting at the time of field construction.

The coupling hole 15 may be formed at a corresponding position of the joint surface when the variable body 10 and the upper plate 20 are fastened to each other, .

As described above, after fitting the flexible body 10 and the upper plate 20 according to the circumstances, the work such as the installation of the inner wall is completed through concrete injection and the like, and a manhole repair is performed by applying a field prefabricated prefabricated manhole for repairing .

FIG. 5 is a flowchart illustrating a method of constructing a live pre-cast manhole for repair according to the present invention, and FIG. 6 is a view illustrating an installation example of a field pre-assembled live precast manhole for repairing the present invention.

5 and 6, the method for constructing the field pre-cast manhole for repair according to the present invention comprises the step of constructing the construction site (S10), the step of confirming the location of the installation site (step S20) (Step S30), the wall construction construction and backfill step (S50), the water level installation and PC top plate combination step (S60), the manhole structure construction and packaging step (S70), and the mold removal And a finishing step S80.

The construction site disposal step (S10) is a step of removing the asphalt surface layer and the base layer after the road cutting according to the size of the construction site in which the manhole requiring repair is secured after ensuring safety for safe passage of the vehicle and the pedestrian, It is a process to remove manhole cover and manhole.

After the construction site disposal step S10 is completed, the installation site disposal site disposal confirmation step S20 is performed.

In the step S20, the substation grounder dismantles the substructures such as roads and manholes in the facility site disposal step S10, and then disposes obstacles such as electric wires embedded in the grounds and various pipes And the step of confirming the row grounding tester (S20) is performed in order to grasp the range and the like.

More specifically, after the construction site is destroyed, additional trenching work is further performed along the installation direction of the obstacle, that is, the longitudinal direction.

This is because most of the obstacles such as electric wiring and water and sewage facilities buried in the past are extended or installed over a long period of time, In order to confirm the specifications of the apparatus.

As described above, in the step of confirming the row foundation terraces (S20), according to the standard of the manhole installed at the repair work using the conventional precast manhole, it is manufactured before the installation, In order to make the repair manhole included in the repair manhole, the maintenance of the live condition without the cutting process for new construction or maintenance, and the confirmation of the maintenance manhole to be installed, .

1 to 4) and a steel structure or the like in accordance with the situation of the site.

After the above-described line foundation terra cotta verification step (S20), the structure demolition and facility arrangement step (S30) are performed.

This is a process of dismantling the obstacles and the installed structures buried in the construction site and arranging the facilities easily.

Here, in order to prevent breakage of the wire or the like during the working process, it is protected by using a protective member such as a wire protection tube, and the conduit tube is held in a suspended position to prevent a sag due to a load .

After the demolition of the structure and the arrangement of the facility (S30) are completed, in the base and structure construction step (S40), the site floor arrangement and the floor concrete construction for the field construction are performed and the finished type body part Or the variable body portion 10 manufactured in the field is installed in the construction site excavated.

In this case, site flooring for construction of the site and concrete pouring at the time of concrete construction are made. At this time, before installing the forbidden concrete, it is necessary to install the forbidden concrete after installing the base PC block, or to place the forbidden concrete without installing the basic PC block according to the situation of the site.

The above-mentioned basic PC block is arranged to fit the place where the pillar portion 12 of the variable-shape body portion 10 is located.

After the variable body portion 10 is disposed on the basic PC block arranged as described above, the obstacle holder 14 of the variable body portion 10 is disposed according to the position of the obstacle suspended in the ground, So that it is maintained in a live state so as not to be in a power failure state or a non-power state.

More specifically, the lower end portion of each column portion 12 is connected to the lower frame 13 after the column portion 12 is coupled to the upper frame 11 so that the lower end portion of the column portion 12 is opened. .

This is for installation so as not to affect the obstacle installed in the field, and the obstacle is introduced by being moved from the upper side to the lower side of the obstacle by the open part.

After the structure including only the upper frame 11 and the pillar 12 of the variable body portion 10 is installed and the lower frame 13 is fixed to the lower frame 13, And the variable-shape body portion 10 is installed in the field.

In order to prevent the tangible object installed on the site from being separated from the tentative position or sagging due to the self weight, it is preferable to install the variable tangible body 10 in the tangible water cradle 14 of the variable- So as to support the obstacle.

After the foundation and structure construction step S40 is completed, the wall construction and backfilling step S50 is performed.

In the step S50 of constructing and refurbishing the wall, in order to construct a wall on the side of the variable-type body portion 10 installed at the construction site in the previous stage S40, the reinforcing bars for the wall and the formwork are installed, The wall is cured by using a heating device using steam or microwave after the wall is installed in the heating device 10.

In this case, the form is installed on the inner side of the variable-type body portion 10 so as to be easily removed after the construction, which is to be removed from the inside of the manhole after completion of the construction.

This is because when the concrete is installed on the outer wall of the existing structure, after the concrete is cured, it is necessary to perform back-up work after removing the form, and when the existing pre-cast manhole is installed, only the back-up operation is performed. Therefore, And the bonding force of the adhesive is lowered.

At this time, the side wall is installed with one of soil board or plywood which is a retaining wall, and the side wall is installed by applying an external soil wall and formwork and then sidewall backing work is performed. In this case, sand, fine soil or gravel The back-up operation is performed.

In this way, it is intended to shorten the length of air and to minimize the inconvenience of pedestrian and vehicle traffic due to shortening of the air.

After the mold is installed as described above, the concrete is poured into the side wall portion, and then the curing process is performed.

At this time, the concrete curing process is to cure rapidly by applying ultra fast speed concrete, or to supply steam which maintains the temperature of 65 ° C to 75 ° C, to supply steam curing or microwave, thereby rapidly curing the concrete.

Here, maintaining the steam temperature for the steam curing at 65 ° C to 75 ° C is for maintaining the optimal curing condition. When steam of less than 65 ° C is supplied, the curing time is prolonged, and when steam is cured before curing And when steam of 75 ° C or higher is sprayed onto the concrete before curing, there is a problem that the strength of the concrete is lowered due to drying due to the high temperature before the concrete is cured.

After the wall construction and backfilling step (S50), a water level setting and a PC top plate joining step (S60) are performed. The PC top plate, that is, the pre-cast upper plate (10) is attached to the upper end of the variable- 20, and a diaphragm is installed to reinforce the void space between the variable-type body portion 10 and the upper plate portion 20.

At this time, the waterproof plate is disposed between the flexible body 10 and the upper plate 20 as a water swell plate, and functions as a buffer and waterproof.

After the diaphragm is installed as described above, the variable-shape body portion 10 and the upper plate portion 20 are fastened using fastening bolts.

As described above, the manhole structure construction and packaging step (S70) is performed after the installation of the water level plate and the PC top plate (S60). The manhole structure refers to a facility such as a manhole cover and a manhole. After completion, the road is repaired by performing a paving operation on the digged road for installation work.

After completion of the above-described process, after completing a subsequent work such as removing a formwork and arranging a cable installed in a manhole, a form removing and finishing step (S80) for completing the work is performed.

At this time, the inner mold is removed in the finishing step, and the inner surface of the manhole is waterproofed, and the finishing work such as the surrounding arrangement and cleaning is performed.

The present invention provides a prefabricated prefabricated manhole for repair and a method of construction thereof, through the series of steps as described above.

10: Adjustable body part 11: Upper frame
12: column portion 13: lower frame
14: obstacle support 20: top plate

Claims (9)

A precast manhole capable of performing maintenance work while maintaining the live condition without damaging the obstacles such as communication lines, electric wires and various piping installed at the installation place of the manhole requiring maintenance, And a lower frame 13 coupled to a lower end of the column portion 12. The upper frame 11 and the lower frame 13 are connected to each other at a lower end of the upper frame 11, A plurality of steel members are connected to each other by using a connecting member 30 to form a cube shape, A variable body portion 10 which can be extended in a plurality of cube shapes according to a situation of a site;
And a top plate 20 which is joined to the upper end of the deformable body 10 and which is precasted and completed. In the field construction, water swell for water tightness and buffering function between the flexible body 10 and the upper plate 20 And a manhole is repaired by installing a wall of the variable-type body part (10) through concrete pouring after the variable-shape body part (10) and the upper plate part (20) On-site prefabricated live-line precast manhole.
delete delete delete A variable body portion 10 for performing maintenance work while maintaining a live state without damaging obstacles such as communication lines, electric wires and various pipelines installed at a place where manholes are required to be repaired, and a precast upper plate portion 20 A method of constructing a prefabricated prefabricated prefabricated manhole,
(S10) of removing the road cutting and asphalt removal and the manhole cover and the manhole, which are foundations, according to the size of the construction site requiring maintenance;
After the construction site disposal step (S10), it is necessary to confirm the position of the obstacle such as the electric wiring and the water supply and sewerage facilities buried in the underground, and the actual installation position of the obstacle such as the electric wiring and water and sewerage facilities buried in the underground of the construction site In order to determine the range, additional trenching work is performed along the installation direction of the obstacle, that is, along the longitudinal direction, and the precast precast top plate is selected, and the deformable body portion and the steel structure, (Step S20);
A step S30 of demolishing the structure and removing the structure and the installed structure at the construction site after the step S30 of confirming the string foundation terraces,
After the demolition of the structure and the arrangement of the facility (S30), after the floor flooring and floor concrete construction, the variable body portion 10 is repaired in the field or the variable body portion 10 manufactured in the field is installed on the construction site. Step S40;
In order to construct the wall of the variable-shape body portion 10 installed after the foundation and structure construction step S40, the wall of the variable-shape body portion 10 is constructed through concrete pouring together with the reinforcement for the wall and the formwork installation, (S50) of applying and backing up the curing and refilling operation by supplying steam to maintain the temperature of 50 to 75 占 폚 or using a microwave heating device;
A step of installing a waterproof plate and a PC top plate (S60) for joining the pre-cast upper plate 20 after installing a waterproof plate on the upper end of the flexible body 10 after the wall construction and back-up step S50;
A manhole structure construction and packaging step (S70) for constructing a structure such as a manhole cover after the installation of the water level plate and the PC top plate (S60); And
And removing the formwork for the wall, removing the formwork to be waterproofed, and finishing step (S80).
delete 6. The method of claim 5,
In the base and structure construction step (S40), the foundation PC block is installed at the place where the column portion 12 of the variable-shape body portion 10 is to be placed at the construction site, and then the foreside concrete is laid, A concrete prefabricated prefabricated prefabricated manhole construction method, characterized in that concrete is laid.




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