KR20020017835A - Precast Concrete Structure for Manhole and Construction Method of Manhole for using It's Thereof - Google Patents

Abstract

PURPOSE: An installation method of a water supply manhole by using a precast concrete structure for a water supply manhole is provided to reduce the period and cost of construction, to form a high-quality manhole structure and to simplify a maintenance work. CONSTITUTION: The installation method of a water supply manhole by using a precast concrete structure for a water supply manhole comprises the steps of: locating a footing concrete plate(10) attached with a height-adjusting jack(11) in the central lower part of a sluice valve(2), then placing on the bottom of an excavation part(3); setting a lower concrete pipe(20) by placing on the footing concrete plate(10); fitting a water supply pipe(1) to an upper groove of the lower concrete pipe(20) by operating the height-adjusting jack(11); filling up an interval between the footing concrete plate(10) and the excavation part(3) with floor concrete materials(50); fitting a lower groove of an intermediate concrete pipe(30) to the water supply pipe(1) and connecting to the upper end of the lower concrete pipe(20); connecting upper concrete pipes(40) on the intermediate concrete pipe(30) continuously; and putting an iron cover(60) on the uppermost part of the upper concrete pipes(40), then restoring the excavation part(3).

Description

Precast Concrete Structure for Manhole and Construction Method of Manhole for using It's Thereof}

The present invention relates to a manhole for protecting the water side of the water supply pipe buried underground, especially the construction of the manhole through the method of pre-installing the foundation and walls of the manhole as a precast concrete product in the factory By completing the present invention, the present invention relates to a precast concrete structure for a water supply manhole and a method of constructing a water supply manhole using the same, which not only shorten the construction period but also greatly reduce the construction cost and are easy to maintain.

Water supply manhole is protected by accepting a distillation valve installed for the purpose of controlling the direction of the water pipe or controlling or blocking the water flow, an air valve installed for the purpose of extracting the accumulated air in the pipeline, and a fire extinguishing valve for connecting the fire hose. Or underground structures installed underground for maintenance.

Most of these water supply manholes are installed at the boundary between the roadway and the sidewalk, but are inevitably installed on the roadway without a sidewalk.

Conventionally, the construction of the manhole is undergoing a process such as ground excavation-installation of the water side-concrete foundation-wall and upper slab concrete casting-surrounding pavement recovery.

The conventional manhole construction method as described above has a number of problems, as follows, because all operations for forming the manhole structure are performed directly on the site.

In other words, since it takes a long time to form a concrete structure, such as formwork and dismantle, and cure it to pour concrete, the construction period becomes long (about 20 days), resulting in high construction costs and economic efficiency. There was a problem.

In addition, there is a problem that the inconvenience of citizens is increased due to long-term vehicle blocking, securing a detour road, and a long-term exposure to a risk of a safety accident.

In addition, in forming the concrete structure, the foundation concrete is first poured and cured, and then the walls and slab concrete are secondly constructed, so that proper titration and wet curing are difficult for securing concrete quality. Since the concrete is inevitably cracked in the construction joint between the first concrete and the later concrete, the interior of the manhole is saturated with water due to the rise of groundwater level around the manhole and the infiltration of rainwater. It is not doing its duty to protect the back.

Accordingly, the present invention aims to solve the problems caused by the prolonged construction in the conventional water supply manhole, which is dependent on the construction of the site, the problem of deterioration of durability due to poor quality control, and the problems of corrosion of the water supply system due to the infiltration of groundwater and rainwater. It was created.

Therefore, the purpose of the present invention is to not only shorten the construction period, but also to reduce the construction period by completing the construction of the manhole through the method of pre-installing the foundation and walls of the manhole in the factory as precast concrete products and assembling and installing them on site. It is to provide a precast concrete structure for the water supply manhole and a construction method of the water supply manhole using the same, which greatly reduces the cost, implements a high quality manhole structure, and is easy to maintain after construction.

1 is a perspective view showing a precast concrete structure according to the present invention

Figure 2 is a side cross-sectional configuration diagram of the water supply manhole constructed according to the present invention

3 is a plan view of a manhole of the present invention applied to a two-terrain water pipe

4 is a plan view of the manhole of the present invention applied to a triangular water pipe

Figure 5 is a plan view of a manhole applied to the four-terminated water supply pipe of the present invention

<Description of Symbols for Major Parts of Drawings>

1: water pipe 2: dilution 3: rig

10: foundation concrete plate 11: height adjustment jack 12: fixing groove

20: lower concrete pipe 21: upper groove 30: middle concrete pipe

31: lower groove 40: upper concrete pipe 50: floor concrete

60: iron cover 71: exponent expansion agent 72: concrete bonding agent

73: Fixed piece a:

Hereinafter, the technical configuration of the present invention will be described in detail with reference to the accompanying drawings in accordance with embodiments of the present invention.

1 shows a concrete structure applied to the present invention.

As shown in this figure, the concrete structure for the water supply manhole of the present invention includes: a base concrete plate 10 that is established in a factory with height adjustment jacks 11 attached to a lower surface thereof; A lower concrete pipe 20 mounted on an upper surface of the foundation concrete plate 10 and having a lower end thereof fixed thereto, and having at least two semicircular upper grooves 21 formed at predetermined positions of the upper concrete part; An intermediate concrete pipe having a lower end portion connected to an upper portion of the lower concrete pipe 20 and having a semicircular lower groove 31 formed at the lower end of each lower position corresponding to the upper groove 21 of the lower concrete pipe 20. 30; It consists of a plurality of upper concrete pipes (40) which are connected to the upper part of the intermediate concrete pipe (30) in succession to be laminated.

In carrying out the present invention, the base concrete plate and concrete pipes may be formed in a quadrangular shape, but in view of the ease of construction and structural rigidity, etc., it is preferable that they are formed in a circular shape.

In addition, according to the characteristics of the manhole in which the concrete structures are installed, the diameter, the height, and the water supply pipe direction (for example, the concrete structure applied to the bi-type water supply pipe are formed with two grooves aligned with the direction of the water supply pipe). In addition, the concrete structure applied to the tri- or tetra-type water supply pipe may be variously manufactured by three or four grooves).

The foundation concrete plate 10 is formed with a fixing groove 12 to which the lower end of the lower concrete pipe 20 is fitted.

Jack 11 attached to the lower surface of the base concrete plate 10 is used to lift and lower by a screw type, the screw jack 11 is a position that can maintain the horizontal level of the base concrete plate 10 It is attached to 4 places of.

The upper and lower ends of the lower concrete pipe 20 and the upper and lower ends of the intermediate concrete pipe 30 and the upper and lower ends of the upper concrete pipes 40, when they are stacked, a stepped portion (a) that is mutually matched to the outer periphery Formed accordingly.

Water treatment manhole construction method according to the present invention using a concrete structure as described above, a) foundation concrete plate installation step-b) bottom concrete pipe installation step-c) bottom concrete pipe height adjustment step-d) floor concrete material filling Step-e) middle concrete pipe installation step-f) upper concrete pipe installation step-g) excavation paving step is completed in order to complete.

Figure 2 illustrates a side cross-sectional configuration of the water supply manhole constructed using the concrete structure of the present invention. Figure 3 shows a planar configuration of the manhole to which the present invention is applied to the two-terrain water pipe, Figure 4 illustrates a planar configuration of the manhole to which the three-terrain water pipe is applied, and Figure 5 is a manhole to which the four-hole water pipe is applied.

The construction method of this invention is demonstrated in detail with reference to these drawings.

a) The basic concrete installation step is to excavate the ground at the point where the distillation side (2) is to be installed in the pipeline where the water supply pipe (1) is embedded, and to connect the distillation side (2) to the water supply pipe (1). Position the base concrete plate 10 manufactured at the factory in the state in which the height adjustment jack 11 is attached to the lower surface of the dilution side 2, and then the jack 11 at the bottom of the excavation part 3. It is done through supporting work.

b) The lower concrete pipe installation step is to place the lower concrete pipe 20 with a semicircular upper groove 21 between the water pipe 1 and the base concrete plate 10 at the place where the water pipe 1 passes from above. Put and put on the upper portion of the base concrete plate 10 is made by performing the operation to fix. At this time, the lower end of the lower concrete pipe 20 is fitted into the fixing groove 12 formed in the center of the base concrete plate 10 is assembled.

c) lower concrete pipe height adjusting step is to operate the height adjustment jack 11 mounted on the lower portion of the base concrete plate 10 to lift the base concrete plate 10 and the lower concrete pipe 20 to the upper groove This is achieved by fitting 21 and the water pipe 1 together.

d) filling the floor concrete material is to fill the uncured floor concrete material 50 between the base concrete plate 10 formed by the height adjustment jack 11 and the bottom of the excavation part 3; Is done through. At this time, the height adjustment jack 11 is buried by the bottom concrete material (50).

e) The intermediate concrete pipe installation step is to place the intermediate concrete pipe 30 with a semi-circular lower groove 31 in the place where the water pipe (1) passes from the bottom groove 31 to the water pipe (1) It is made by putting the upper concrete tube 20 on top of the fitting while fitting. At this time, it is assembled by fitting the stepped portion formed in the upper and lower parts of the concrete pipes.

f) The installation of the upper concrete pipe is a step of stacking up to the pavement surface while connecting the upper concrete pipes 40 to the upper portion of the intermediate concrete pipe 30 in succession. At this time, the upper concrete pipe 40 is installed on the top floor is used to produce a truncated cone-shaped according to the height change and the standard of the iron cover (60).

g) Excavation paving step is a finishing step of forming a pavement layer while covering the top of the upper concrete pipe 40, the iron cover 60 and recovering the excavation (3).

As described above, the present invention is completed by using the precast concrete structures manufactured in the factory, the construction of the manhole is completed by simply assembling and installing in the field.

Therefore, the conventional method of cast in place takes about 20 days, but the present invention is enough in one day, so the air is greatly shortened.

On the other hand, in the construction of the water supply manhole according to the present invention, the lower concrete pipe 20 is a part fixed to the base concrete plate 10, the water pipe 1 is the lower and middle concrete pipe 20, 30 The upper and lower grooves 21 and 31 to be fitted into the portion, the lower concrete pipe 20 and the intermediate concrete pipe 30 and the portion where the upper concrete pipe 40 is connected, the expansive expansion agent 71 After inserting it is bonded with a high-strength concrete binder (72) to ensure watertightness.

In addition, a plurality of fixing pieces 73 are arranged at predetermined intervals in the portions to which the lower, middle and upper concrete pipes 20, 30 and 40 are connected, and fixing the fixing pieces 73 with bolts. This increases the connection power.

Therefore, the manhole completed by the present invention has a triple joint structure in which an expansive agent is inserted into the connection portion of each structure and joined with a high-strength concrete binder, and is bound by the fastening pieces, and thus can not be damaged by earth pressure and load. High quality tap water manholes without worry and leakage are completely prevented.

As described above, the construction method of the precast concrete structure for the water supply manhole of the present invention and the water supply manhole using the same, since the integrated manhole is basically obtained using the concrete structure established in the factory, water leakage may occur inside the manhole. Not only can the high quality be guaranteed without worry, and the construction is very easy.

Therefore, according to the present invention, the construction period at the site is drastically shortened, the inconvenience of citizens is eliminated due to the shortening of air, the possibility of occurrence of safety accident is eliminated, and sufficient economic efficiency is secured (approximately 40% of conventional technology). It is a very useful invention having various effects such as cost reduction effect.

Claims (6)

A base concrete plate 10 ready-made in a factory with the height adjustment jacks 11 attached to the lower surface thereof; A lower concrete pipe 20 mounted on an upper surface of the foundation concrete plate 10 and having a lower end thereof fixed thereto, and having at least two semicircular upper grooves 21 formed at predetermined positions of the upper concrete part; An intermediate concrete pipe having a lower end portion connected to an upper portion of the lower concrete pipe 20 and having a semicircular lower groove 31 formed at the lower end of each lower position corresponding to the upper groove 21 of the lower concrete pipe 20. 30; A precast concrete structure for waterworks manholes, characterized in that consisting of; a plurality of upper concrete pipes (40) are connected to the upper part of the intermediate concrete pipe (30) and subsequently stacked. The precast concrete structure for water supply manhole according to claim 1, wherein the foundation concrete plate (10) is provided with a fixing groove (12) into which the lower end of the lower concrete pipe (20) is fitted. The upper and lower ends of the lower concrete pipe 20, the upper and lower ends of the intermediate concrete pipe 30, and the upper and lower ends of the upper concrete pipes 40, respectively, when they are stacked, the stepped portion ( A precast concrete structure for waterworks manholes, characterized in that a) is formed along the outer circumference. a) In the state of excavating the ground and connecting the dividing side 2 to the water pipe 1, the base concrete plate 10 attached to the lower surface of the height adjustment jack 11 is located at the center lower part of the dividing side 2 After supporting the bottom of the excavation (3); b) the lower concrete pipe 20 having the semicircular upper groove 21 is inserted between the water supply pipe 1 and the base concrete plate 10 at the place where the water pipe 1 passes from above. 10) to settle on top of; c) operating the height adjusting jacks 11 to lift the base concrete plate 10 and the lower concrete pipe 20 to fit the upper grooves 21 and the water pipe 1; d) filling the uncured bottom concrete material 50 between the base concrete plate 10 formed by the height adjusting jack 11 and the bottom of the excavation part 3; e) the lower concrete pipe while fitting the lower groove 31 into the water pipe 1 by fitting the middle concrete pipe 30 having the semicircular lower groove 31 in the place where the water pipe 1 passes from below; Putting on the top of the connection (20); f) stacking up to the pavement surface while continuously connecting upper concrete pipes 40 to the upper portion of the intermediate concrete pipe 30; g) covering the upper portion of the upper concrete pipe (40) with the iron cover (60) and recovering the excavation (3); Construction method of water supply manhole characterized in that through the. The upper and lower portions of claim 4, wherein the lower concrete pipe 20 is fixed to the base concrete plate 10, and the water pipe 1 is fitted to the lower and middle concrete pipes 20 and 30. Portions of the grooves 21 and 31, the lower concrete pipe 20, the intermediate concrete pipe 30, and the upper concrete pipe 40 are connected to the high-strength concrete binder after inserting the expansive expander 71. A method of constructing a water supply manhole, characterized in that the joint is joined to (72) to ensure watertightness. According to claim 4 or 5, Wherein the lower, middle and upper concrete pipes 20, 30, 40 are connected to a portion of the plurality of fixing pieces 73 are arranged at regular intervals, the fixing A method of constructing a water supply manhole, characterized by increasing the connection force by fixing the pieces 73 with bolts.