KR100880022B1 - Prefabricated precast concrete pumping plant manhole - Google Patents

Abstract

The present invention relates to a prefabricated PC pump station manhole, a prefabricated PC pump station manhole that can realize the balance of the manhole and increase the mechanical strength (tensile and compressive strength) through the assembly guide and tension using reinforcing bars and steel wires and construction method It is about.

Description

Prefabricated PC Pump Manhole {PREFABRICATED PRECAST CONCRETE PUMPING PLANT MANHOLE}

1 is a perspective view showing a prefabricated PC pump station manhole according to a preferred embodiment of the present invention.

2 is a plan view of FIG.

3 is a cross-sectional view taken along line II-II of FIG. 2;

4 is an enlarged cross-sectional view of a portion B of FIG. 3.

5 is an enlarged cross-sectional view of a portion C of FIG. 3.

6 is a cross-sectional view taken along line III-III of FIG. 2;

7a to 7h are perspective views showing the construction sequence of the prefabricated PC pump station manhole according to a preferred embodiment of the present invention.

8 is a flow chart showing the construction sequence of the prefabricated PC pump station manhole according to a preferred embodiment of the present invention.

Figure 9 is a cross-sectional view of a conventional PC prefabricated manhole.

10 is an enlarged cross-sectional view of portion A of FIG. 9;

** Description of symbols for the main parts of the drawing **

10,100: prefabricated PC pump station manhole 11: manhole cover

13: entrance 14: reinforcing bolt

15: nut member 30: branch pipe

31: Inlet 33: Outlet

35 ventilation hole 110 lower slab

116,117: groove 118: accommodation home

120: lower vertical sphere 121: chamfered portion

130: middle slab 140: upper vertical sphere

150: vertical sphere 160: upper slab

170: steel wire 180: tension member

182: wedge 184: fixing cone

190: waterproof sheet of asphalt 195: reinforcing bars

197 Mortar 198 Burseal

MB: Manhole Body S: Groove Joint

Patent Document: Korea Utility Model Registration No. 20-378412

The present invention relates to a prefabricated PC pump manhole, and to a PC prefabricated manhole and construction method that can realize the balance of the manhole and increase the mechanical strength (tensile and compressive strength) through the assembly guide and tension using reinforcing bars and steel wires It is about.

As a conventional PC-assembled manhole, one disclosed in a patent document (Korean Utility Model Model No. 20-378412) is proposed.

9 and 10, the PC-assembled manhole 10 embedded in the basement is fixed to the lower casing 12-3 preformed with concrete or the like and onto the lower casing 12-3 concentrically. At least one intermediate casing (12-2), and the upper casing (12-1) which is mounted on the upper surface of the intermediate casing (12-2) concentrically and fixed to the upper surface and formed an entrance; (12-1), the intermediate casing 12-2 and the lower casing 12-3 are made by stacking and fixing concentrically.

The intermediate casing 12-2 is to adjust the height of the manhole, and if necessary, the height of the manhole can be adjusted by adding or subtracting the number of assemblies.

The upper casing 12-1 has a coupling protrusion 16 formed to protrude in the circumferential direction on the bottom of the side wall, and a nut member 15 made of metal is inserted into the bottom of the side wall on which the coupling protrusion 16 is formed. The nut member 15 is assembled to the upper casing 12-1 in advance by molding the upper casing 12-1 by placing the upper casing 12-1 in the mold in advance and molding the upper casing 12-1. It becomes. The upper surface is formed with an entrance and the manhole cover 11 is coupled.

The circumference of the entrance to which the manhole cover 11 is assembled is an annular flange portion 25 is embedded and fixed with a fixing bolt. The rebar bolt 14 is fastened to the nut member 15 so as to protrude downward from the bottom of the upper casing 12-1 by a predetermined length.

On the other hand, the intermediate casing (12-2) is formed on the upper surface of the annular groove 17 is engaged with the engaging projection 16 of the upper casing (12-1), the groove 17 is the upper casing ( Receiving groove 18 for inserting the reinforcing bolt 19 protruding from the bottom of 12-1) is formed to a certain depth, the bottom and the nut member and the reinforcing bolt 19, the same as the upper casing (12-1) ) Is fastened.

In addition, the lower casing 12-3 has an inlet 31 formed on a side wall thereof, and the branch pipe 30 is connected to the lower casing 12-3. The upper casing 12-3 has an intermediate casing 12-11 formed on an upper surface of the intermediate casing 12-2. A plurality of receiving grooves for inserting and fixing the recesses and the reinforcing bolts 19 for accommodating the engaging projections provided on the bottom of 2) are formed at a constant depth.

Referring to the process of assembling the PC prefabricated manhole configured as described above, the mortar (1) is applied to the recess provided on the base of the lower casing (12-3) and the upper surface of the side wall of the lower casing (12-3) After filling, the intermediate casing 12-2 is laminated so that the engaging projection provided on the bottom surface of the side wall of the intermediate casing 12-2 is inserted into the recess of the lower casing 12-3, and the intermediate casing 12-2. Is positioned exactly in concentric manner with the lower casing (12-3), and at the same time the reinforcing bolts 19 protruding from the bottom of the side wall of the intermediate casing (12-2) of the lower casing (12-3) The intermediate casing 12-2 and the lower casing 12-3 stacked on each other by being inserted into the receiving groove formed on the upper surface and fixed by mortar are firmly fixed to each other.

Subsequently, mortar is applied or filled to the groove provided on the upper sidewall of the intermediate casing 12-2, and then the upper casing 12-1 is placed thereon, and the engaging protrusion provided on the bottom surface of the upper casing 12-1. If the upper casing 12-1 is fitted to the upper groove of the intermediate casing 12-2, the upper casing 12-1 is disposed exactly and concentrically with respect to the intermediate casing 12-2 and the lower casing 12-3 below. At the same time, the bottom surface of the upper casing 12-1 and the upper surface of the intermediate casing 12-2 are bonded to each other by mortar, and the reinforcing bolt 14 is also firmly fixed by mortar in the receiving groove.

However, the pre-fabricated PC casing is prepared to have an error in manufacturing, in this case it is difficult to maintain the balance of the manhole because the alignment between the reinforcing bolt and the receiving groove is difficult.

In addition, since the casings are assembled by stacked self-weight, both tensile strength and compressive strength are insufficient, and thus the casing is susceptible to breakage due to buckling or shearing.

In addition, since the grooves 17 are in the shape of cavities that are engaged with each other, there is a hassle to be stacked after the mortar 1 is inserted and filled.

In addition, since the receiving groove 18 is in the shape of a vertical groove without taper, the gap between the reinforcing bolt 14 and the receiving groove 18 is wide, so that when the reinforcing bolt is displaced every time the casing is stacked, the groove is fine. It can be stacked zigzag.

In addition, since the gap in which the casing is stacked is sealed only by rubber, leakage of groundwater or sewage may occur when rubber is damaged depending on the external environment.

 The present invention has been made to solve the above-described problem, prefabricated PC pump station manhole that can realize the balance of the manhole and increase the mechanical strength (tensile and compressive strength) through the assembly and tension using rebar and steel wire and its The purpose is to provide a construction method.

The prefabricated PC pump station manhole of the present invention for achieving the above object is formed with a lower slab, a plurality of steel wires protruding upwards, the inlet and an outlet, the vertical sphere is mounted on the upper surface of the lower slab while being fitted into the steel wire and Manhole entrance is formed, characterized in that it comprises an upper slab mounted on the upper surface of the vertical sphere while being fitted to the steel wire, and a tension member for tensioning the steel wire protruding to the upper surface of the upper slab.

PC prefabricated pumping station manhole construction method according to another embodiment of the present invention comprises the steps of (a) basic construction; (b) mounting a lower slab with a plurality of steel wires projecting upward on the base; (c) mounting a vertical sphere on the upper surface of the lower slab while being fitted in the upwardly projecting steel wire; (d) mounting the upper slab on the upper surface of the vertical sphere while being fitted into the upwardly projecting steel wire; (e) tensioning and fixing the steel wire protruding from the upper surface of the upper slab.

According to this configuration and process, it is possible to realize the balance of the manhole and increase the mechanical strength (tensile and compressive strength) through the assembly and tension using the steel wire.

In the above configuration, the lower slab, the vertical sphere and the upper slab are polygonal; The inner edge of the vertical sphere is chamfered; When the steel wire is disposed at the corner of the chamfer, it is possible not only to reinforce the edge strength of the slab and the vertical sphere, but also to prevent the strength degradation due to the penetration hole for the insertion of the tensile steel wire.

In addition, when the asphalt waterproof sheet is attached to the boundary portion in which the lower slab, the vertical sphere, and the upper slab are mounted, double sealing can be performed together with sealing by rubber.

In addition, the vertical sphere is composed of the lower vertical sphere mounted on the lower slab, the upper vertical sphere on which the upper slab is mounted, the intermediate slab interposed between the lower vertical sphere and the upper vertical sphere; Reinforcing bolts protruding downward are installed on the lower surface of the vertical sphere and the lower surface of the upper slab, and the receiving groove is formed on the upper surface of the lower slab and the upper surface of the vertical sphere to accommodate the reinforcing bolts. Taper-shaped, the diameter of which decreases downwards; Recesses are formed on the lower surface of the reinforcing bolt and the upper surface of the receiving groove, respectively, to form upper and lower concave cavities; Preferably, the slabs and the vertical sphere are filled with reinforcing bars and mortar.

In addition, the vertical sphere is a lower vertical sphere to be mounted on the upper surface of the lower slab with the reinforcing bolt inserted, the intermediate slab mounted on the upper surface of the lower vertical sphere with the reinforcing bolt inserted, and the reinforcing bolt is inserted It consists of an upper vertical sphere mounted on the upper surface of the intermediate slab,

After the step (e), the step of inserting and filling the reinforcing bars and mortar on the upper surface of the upper slab, and preferably the step of attaching and finishing the gap between the slab and the vertical sphere with an asphalt waterproof sheet.

Best Mode for Carrying Out the Invention Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, where like reference numerals are used to designate like parts and a detailed description thereof will be omitted.

1 is a perspective view showing a prefabricated PC pump station manhole according to a preferred embodiment of the present invention, Figure 2 is a plan view of Figure 1, Figure 3 is a cross-sectional view taken along the line II-II of Figure 2, Figure 4 3 is an enlarged cross-sectional view of part B, FIG. 5 is an enlarged cross-sectional view of part C of FIG. 3, and FIG. 6 is a cross-sectional view taken along line III-III of FIG. 2.

As shown in Figs. 1 to 3, the prefabricated PC pump station manhole 100 of the present embodiment includes a manhole main body MB that forms an external appearance, a steel wire 170 provided in the manhole main body MB, and the steel wire. It is composed of a tension member 180 to tension.

The manhole main body MB is composed of a lower slab 110, a vertical sphere 150, and an upper slab 160.

The lower slab 110 is composed of a plate of polygonal shape (a quadrangular shape in this embodiment) which is mounted on a foundation.

The vertical sphere 150 is a vertical polygonal wall, and may be implemented as the lower vertical sphere 120 and the upper vertical sphere 140 as in the present embodiment according to the height of the manhole 100. In addition, the vertical sphere 150 may further include an intermediate slab 130 interposed between the lower vertical sphere 120 and the upper vertical sphere 140.

The lower vertical sphere 120 is mounted on the lower slab 110 while being fitted to the steel wire 170 as shown in FIGS. 7A and 7B. In the inner edge there is a chamfer (part connecting the ends extending a predetermined distance from the intersection of two straight lines) is formed a hole in which the steel wire 170 is fitted. Since the chamfer 121 is thicker than the edges of the four sides, it is possible to prevent the decrease in strength due to the formation of the insertion hole by inserting the steel wire 170. Moreover, the groove | channel in which the mortar 197 is inject | poured is formed around the chamfer part 121 as a boundary. Therefore, when the mortar 197 is injected, it may be prevented from flowing into the through hole having the steel wire 170. In addition, an inlet 31 to which the branch pipe 30 is connected is formed on one side wall of the lower vertical sphere 120.

The middle slab 130 is also mounted on the upper surface of the lower vertical sphere 120 while being fitted to the steel wire 170 as shown in FIGS. 7C and 7D. The middle slab 130 has the same structure as the lower slab 110, but pumps sewage or groundwater introduced into the lower vertical sphere 120, or sewage flowing through the manhole cover 11 and the entrance 13. It is preferable that a grating hole 131 is formed to filter out residues of the back.

Like the lower vertical sphere 120, the upper vertical sphere 140 is mounted on the upper surface of the middle slab 130 while being fitted to the steel wire 170, as shown in Figure 7e and 7f, the rest of the function and structure is the same. The upper vertical sphere 140 is formed with an outlet 33 and a ventilation opening (35).

Of course, it can be implemented by stacking a plurality of lower vertical spheres according to the height of the pump station manhole.

Finally, the upper slab 160 is mounted on the upper surface of the upper vertical sphere 140 while being fitted to the steel wire 170, as shown in Figure 7g.

As such, when lamination is completed while the lower slab 110, the vertical sphere 150, and the upper slab 160 are fitted to the steel wire 170, as shown in FIG. 6, the steel wire 170 as the tension member 180. Tension).

As shown in Figure 6, the tension member 180, the fixing cone 184 installed on the upper slab 160, and the upper slab 160 is stacked, the wedge for pulling and fixing the steel wire 170 with a tensioner It consists of 182.

That is, after tensioning the steel wire 170 exposed to the outside with a tensioner, the wedge 182 is driven into the hollow fixing cone 184. Then, when the tensioner is removed, the steel wire 170 is fixed by the wedge 182. Since the wedge 182 is driven between the fixing cone 184 and the steel wire 170 as two or three wedge pieces, the steel wire 170 is firmly held by a wedge function as the steel wire 170 contracts.

In this way, since the manhole main body MB is laminated and stretched together along the steel wire 170, even though each slab or vertical sphere has some manufacturing errors, the assembly balance is good, especially since the slab and the vertical sphere are simultaneously subjected to tension and compression. Or resistance to breakage due to shear.

In addition, in this embodiment, in order to prevent the gap to be mounted, the asphalt waterproof sheet 190 is attached. The asphalt waterproof sheet 190 may be attached not only to the outer wall but also to the inner wall. Therefore, by the construction of the asphalt waterproof sheet 190, it is possible to simply increase the sealing efficiency.

In addition, after the manhole main body MB is fixed in tension, a reinforcing bar 195 is inserted into the through hole (the lower slab has a groove formed in the center of four corners of the manhole main body MB) as shown in FIG. 7H and mortar 197. ) Is preferred (see FIG. 5).

On the other hand, the lower vertical sphere 120, the middle slab 130, the upper vertical sphere 140 and the upper slab 160, as shown in Figures 3 and 4, the concave groove 116 is formed upwards The groove 116 is provided with a nut member 15 and a reinforcing bolt 14.

On the other hand, the upper surface of the lower slab 110, the lower vertical sphere 120, the middle slab 130 and the upper vertical sphere 140 concave downward recessed groove 117 and the reinforcing bolt in a certain depth in the groove 117 The receiving groove 118 is formed.

Therefore, when the vertical sphere 150 is mounted on the lower slab 110, the reinforcing bolt 14 is accommodated in the receiving groove 118.

At this time, since the recess 116 and the recess 117 form a cavity S between the recessed upper and lower dies, the mortar 197 injected from above is easily introduced into the cavity S. Therefore, since it is not necessary to inject mortar every time as it is conventionally installed, the workability is improved.

In addition, the burseal 198, which is a viscous rubber index material, is provided at both sides along the edge of the manhole body MB to prevent the mortar 197 from escaping.

In addition, the receiving groove 118 has a taper (θ) shape in which the diameter thereof decreases downward as shown in FIG. 4. This tapered shape not only determines the position of the reinforcing bolts 14, but also prevents them from shifting from each other after stacking due to the small gap.

Hereinafter, the construction method of the above-mentioned prefabricated PC pump station manhole is demonstrated according to FIG.

First, the foundation work. In other words, foundation works such as digging of pumping station, rubble laying and compaction, rubble cleaning, leveling work. Mount the lower slab 110 on the finished foundation. After installing the steel wire 170 in advance to the lower slab 110 is preferably mounted.

The lower vertical sphere 120 is mounted on the upper surface of the lower slab 110 while being fitted to the steel wire 170 as shown in FIG. 7A. At this time, when the reinforcing bolt 14 is installed, the reinforcing bolt 14 is accommodated while being accommodated in the receiving groove 118.

After the lower vertical sphere 120 is mounted, a gap between the lower slab 110 and the lower vertical sphere 120 is attached to the asphalt waterproof sheet 190 as shown in FIG. 7B. Applying a primer before attaching can improve the adhesion of the sheet.

The middle slab 130 is also mounted on the upper surface of the lower vertical sphere 120 while being fitted to the steel wire 170, as shown in Figure 7c and 7d, other parts are the same as the lower vertical sphere 120.

Next, as shown in FIGS. 7E and 7F, the upper vertical sphere 140 fitted to the steel wire 170 is mounted on the upper surface of the intermediate slab 130. Asphalt waterproof sheet 190 using a wide sheet, it is preferable to attach to the upper gap and the lower gap of the middle slab 130 at the same time.

Then, as shown in FIG. 7g, after the upper slab 160 in which the hollow fixing cone 184 is installed is mounted on the upper vertical sphere 140, the drawn steel wire 170 is pulled by the tensioner and then the wedge 182. Drive it in. The steel wire 170 is then fixed in a tensioned state by the wedge 182. After the tension of the steel wire 170 is completed, the remaining steel wire is cut.

Next, as shown in FIG. 7H, the reinforcing bar 195 is inserted into the manhole body MB, and then mortar 197 is injected around the reinforcing bar 195. Due to the injection of the mortar 197, the mortar 197 is flow-injected into each of the upper and lower edges to be mounted, so the workability is good. It is preferable to use this mortar 197 as a high strength non-contraction grout material.

The asphalt waterproof sheet 190 may be attached every time the slab and the vertical sphere are laminated as described above, or may be attached after all of them are laminated.

As described above, although described with reference to a preferred embodiment of the present invention, the present invention can be variously modified or modified without departing from the spirit and scope of the present invention described in the claims Those skilled in the art will appreciate.

As apparent from the above description, the prefabricated PC pump station manhole of the present invention and its construction method have the following effects.

Since the manhole body is assembled and tensioned through steel wires, the assembly manholes are balanced by eliminating assembly inconsistencies and imbalances caused by manufacturing errors or changes, as well as increasing the mechanical strength (tensile and compressive strength). A large resistance can be given to breakage due to shearing, and durability can be remarkably improved.

In addition, since the steel wire is disposed at the chamfered corner portion, the strength of the manhole body due to the steel wire insertion hole does not decrease while reinforcing the weak edge portion.

Further, by attaching the asphalt waterproof sheet to the gap between the manhole bodies, the sealing efficiency can be doubled.

In addition, since the grooves surrounding the reinforcing bolts are formed with concave upper and lower cavities, the cavity is filled by mortar injection combined with reinforcing bars. Can be significantly improved.

In addition, by forming the receiving groove in which the reinforcing bolts are accommodated, not only plays a role of positioning the reinforcing bolts, but also significantly reduces the gap between the reinforcing bolts and the receiving grooves, thereby restraining the displacement by external force to maintain the stacked state. have.

Claims (6)

delete delete delete A lower slab in which a plurality of steel wires protrude upward; An inlet and an outlet formed therein, the vertical sphere being mounted on the upper surface of the lower slab while being fitted to the steel wire; An upper slab having a manhole entrance and fitted to the steel wire and mounted on an upper surface of the vertical sphere; It includes a tension member for tensioning the steel wire protruding to the upper surface of the upper slab, Reinforcing bolts protruding downward are installed on the lower surface of the vertical sphere and the lower surface of the upper slab, The upper surface of the lower slab and the upper surface of the vertical sphere is formed with a receiving groove for receiving the reinforcing bolt, The vertical sphere is composed of a lower vertical sphere mounted on the lower slab, an upper vertical sphere mounted on the upper slab, an intermediate slab interposed between the lower vertical sphere and the upper vertical sphere, The receiving groove has a tapered shape in which the diameter decreases downwards, Grooves are formed on the lower surface of the reinforcing bolt and the upper surface of the receiving groove, respectively, to form a vertically concave cavity. Prefabricated PC pumping manholes are characterized in that the slab and the vertical sphere is filled with reinforcing bars and mortar. delete delete

Images