KR101916744B1 - Upper structure of bridge with improved stiffness, and Bridge construction method using it - Google Patents

Abstract

The present invention provides a superstructure and a method for constructing a bridge using the superstructure. The present invention is characterized in that a step is provided on one side part of an upper flange of ′I′-shaped molds (1110, 1120) located at both end units of an upper part of a lower structure (2000), and the upper flanges of the ′I′-shaped molds (1130, 1140, 1150) located on both side parts of the upper part of the lower structure (2000) are provided with the step on both side parts, so that a central part of the upper flange protrudes. By allowing slabs (1200) to be individually accommodated between the steps of the adjacent molds and flattened with the upper surface of the mold, sectional rigidity of the mold is improved, and the weight of the slab is reduced after the mold and the slab are combined.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bridge structure having improved stiffness and a method of constructing a bridge using the bridge structure,

The present invention comprises a mold, a slab formed on the upper surface of the mold, and a bottom plate for forming a slab between the mold and the mold, wherein the upper surface of the mold and the upper surface of the slab coincide with each other to reduce the weight of the slab, Which can improve the rigidity of a cross section, and a method of constructing a bridge using the bridge superstructure.

Construction of general bridges can be accomplished by laying a girder-like mold on a hypothetical alternation or pier and pouring concrete onto the mold. Such bridges consist of a substructure comprising an alternating or pier and a superstructure comprising a mold and a slab.

As shown in FIG. 1, a superstructure disclosed in Korean Patent Registration No. 10-1242062 includes a plurality of 'I' shaped concrete molds 10 spaced apart from each other, and a slab 11) is installed. Such a superstructure has a high mold height, and the weight of the slab is heavy, so that the rigidity of the mold 10 has to be increased.

’형상의 주형(31)이 설치되고 상호 이웃한 주형(31)들의 상부플랜지를 연결하는 슬래브(32)가 설치되며, 주형(31)의 상부플랜지 및 슬래브(32)의 상면에 슬래브(33)을 형성하기 위하여 콘크리트가 타설된다. 여기서 주형(31)의 상부플랜지 양측부에 상향 돌출된 돌출지지턱(31a) 사이에 콘크리트가 타설되어 슬래브(33)가 형성되므로, 상부플랜지 상면의 높이보다 슬래브(33)의 상면 높이가 높게 형성된다. 이러한 상부 구조물은 거푸집 설치 작업이 복잡하고, 타설 중 콘크리트 내부에 중공(中空)이 형성되는 문제점이 있다.In addition, as shown in FIG. 2, the upper structure disclosed in Korean Patent Registration No. 10-1256491 is formed on the lower structures 30 spaced apart from each other,

And a slab 33 is provided on the upper flange of the mold 31 and on the upper surface of the slab 32. The slab 32 is connected to the upper flange of the adjacent molds 31, The concrete is poured to form the concrete. Since the slab 33 is formed by placing the concrete between the protruding support protrusions 31a protruding upward from both sides of the upper flange of the mold 31, the height of the upper surface of the slab 33 is formed to be higher than the height of the upper flange do. Such a superstructure has a complicated work for installing a formwork, and a hollow is formed in the concrete during the casting.

Meanwhile, as shown in FIG. 3, in the conventional Korean Patent No. 10-1522007, the molds are arranged at regular intervals on the lower structure 40, and the outer molds 41 and the inner molds 42 are connected It is disclosed that the slab 43 is laid and the slab 43 and the mold are mutually coupled by the connecting member 44. [ However, since the coupling force between the slab 43 and the mold is weak, the slab 43 must be coupled to the mold using a separate connecting member 44, and the slab 43 is placed on the upper surface of the inner mold 42, The bending moment can be increased, and the slab 43 is integrally laid. Therefore, there are problems such as difficulty in formwork installation and difficulty in curing evenly.

Korean Registered Patent No. 10-1242062 (Announced on March 31, 2013) Korean Registered Patent No. 10-1256491 (Announcement of Mar. 19, 2013) Korean Registered Patent No. 10-1522007 (issued on May 21, 2015)

In order to solve the above problems, the present invention is characterized in that a step is provided at one side of the upper flange of the end mold located at both side ends of the upper part of the lower structure, and the upper flange of the middle mold positioned between the both end molds at the upper part of the lower structure, So that the other end portion or the central portion of the upper flange protrudes from the end mold and the central mold and the slabs are accommodated between the adjacent molds at the same time as the upper surface of the mold, It is an object of the present invention to provide an upper structure for improving the sectional rigidity of a mold and reducing the weight of a slab after a mold and a slab are combined, and a method of constructing a bridge using such an upper structure.

In order to achieve the above-mentioned object, the present invention provides a method of manufacturing a semiconductor device, End molds located at both ends of the upper portion of the substructure; A step formed on one side of the upper flange of the end mold; At least one middle mold positioned between the end molds; A step formed at both side portions of the upper flange of the at least one center mold; And a slab which is individually received between the step of the end mold and the step of the central mold, wherein the end mold and the center mold are 'I' -shaped or quadrangular, and each of the end molds And the upper surface of the upper flange and the upper surface of the slab, except for the step and central step formed at the upper flange of the end mold, are arranged on the same line , The side installation height (H) of the upper flange step of the end mold and the central mold and the installation surface installation depth (D) of the upper flange step should be (1) D ≥ 0.442H when H> D , And (2) when H < D, H? 0.439D.

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The present invention is characterized in that the seating surface of each of the upper flange ends of the end mold and the center mold has the same inclination angle as the slope of the upper surface of the slab.

An embodiment of the bridge construction method of the present invention relates to a method of constructing a bridge using the bridge superstructure according to the first or sixth aspect, wherein (a) an upper end mold and a middle mold (S 10); (b) installing (S 20) a slab between the edges of the upper flange of the adjacent end mold and the middle mold; (c) installing a package layer on the end mold, the middle mold, and the upper surface of the slab, and (S30) a step of installing the bridge using the improved bridge superstructure.

(S40) of installing a backup material in a gap between the end mold and the center mold and filling the mortar into the mortar groove when the end mold and the central mold are square in the step (b) .

As described above, according to the present invention, the slabs are disposed between the stepped edges formed at the upper edge of the mold, and the upper surface of the slab is identical to the upper surface of the mold, The weight of the slab after the synthesis is reduced, and the remaining portion except for the edge of the edge is protruded from the mold, so that the sectional rigidity of the mold can be improved.

The horizontal reinforcing bar and the vertical reinforcing bar formed at the step are advantageously combined strongly with the mold and the slab.

Further, the upper surface of the mold and the slab are located on the same line, that is, the shape of the mold is lowered, and the shape of the bridge can be increased.

1 shows a prior art 1
Fig. 2 is a cross-
FIG. 3 is a cross-
Fig. 4 is a cross-sectional view of a bridge having an upper structure of an " I "
5 is a cross-sectional view of the " I " shaped mold of the present invention
Fig. 6 is a perspective view of a vertical reinforcing bar installed in an " I "
Figure 7 is a cross-sectional view of a bridge having an upper structure of a rectangular mold of the present invention
8 is a cross-sectional view of a rectangular mold of the present invention
9 is a cross-sectional view of a bridge having an upper structure of a rectangular mold of another embodiment of the present invention
10 is a cross-sectional view of a bridge having an upper structure of a rectangular mold of another embodiment of the present invention
11 is a cross-sectional view of a rectangular mold of another embodiment of the present invention
12 is a process diagram of the bridge construction method of the present invention

The upper structure of the embodiment of the present invention is characterized in that the end molds 1110 and 1120 are 'I' -shaped with the seating faces 1114 and 1124 and the side faces 1113 and 1123 on one side of the upper flange, And protrusions other than the stepped portions 1111 and 1121 formed on one side of the upper flange are formed as upper surfaces 1112 and 1122. [

The center molds 1130, 1140 and 1150 are formed in an I-shape and have seating surfaces 1132, 1135, 1142, 1145, 1152 and 1155 and side surfaces 1133, 1136, 1143, 1146, 1153 and 1156 on both sides of the upper flange. 1137, 1144, 1147, 1154, and 1157 formed on both sides of the upper flange are formed on the upper surfaces 1131 and 1141 , 1151). That is, the center molds 1130, 1140, and 1150 are formed in the shape of "I", in which both side edges of the upper flange of the I-shaped mold are processed.

And the end molds and the central molds 1110, 1120, 1130, 1140, 1150 are spaced apart from each other to provide an interval L. [ By changing the shapes of the end molds and the central molds and arranging them mutually, stable installation and weight reduction can be achieved. Also, the end molds and central molds 1110, 1120, 1130, 1140, 1150 may be installed so that the upper flange is in close proximity or abutment, at least in one location.

At least one central mold positioned between the end molds 1110 and 1120 located at both ends of the upper part of the lower structure 2000 may be installed according to the construction conditions.

The top slopes of the slabs 1200 individually accommodated between the steps 1111, 1121, 1134, 1137, 1144, 1147, 1154, and 1157 provided in the end molds and the central molds 1110, 1120, 1130, 1140, 1121, 1134, 1137, 1144, 1147, 1147, 1147, 1146, and 1147 provided in the end molds and the central molds 1110, 1120, 1130, 1140, and 1150, 1124, 1132, 1135, 1142, 1145, 1152, 1155 and the upper surfaces 1112, 1122, 1131, 1141, 1151 of the slabs 1154, 1157 are formed to be equal to the inclination angles of the slopes of the upper surface of the slab .

Further, the upper structure 1000 may form a barrier wall 1300 and a package layer 1400, and a safety guide may be further installed on the barrier wall 1300.

1121, 1134, 1137, 1144, 1147, 1154, 1157 so that the synthesis of the end molds and the central molds 1110, 1120, 1130, 1140, 1150 and the slab 1200 can be made strong. 1125, 1132, 1132, 1135, 1142, 1145, 1152, 1155 protruding from the side surfaces 1113, 1123, 1133, 1136, 1143, 1146, 1153, And a reinforcing bar 3002 may be provided.

As shown in the following Table 1 and FIG. 6, the bridge superstructure of the PSC beam or PSC rammer girder can be combined with the mold with a slab end in the form of a crossbar between adjacent molds to improve the cross-sectional bending stiffness of the mold In order for the slab and the mold to integrate and behave, a sufficient composite resistance moment must be generated.

In order to sufficiently support the slab 1200 to be retrofitted, the installation depth D, which is the seating surface of the mold, the installation height H, which is the side surface of the mold, and the effective depths d1 and d2, ) And the like are described.

> Mu, 즉 슬래브와 주형의 합성 저항모멘트(

)가 하중에 의해 발생하는 모멘트(Mu)를 충족시킬 수 있고, H < D인 경우, H ≥ 0.439D이어야만

> Mu, 즉 슬래브와 주형의 합성 저항모멘트(

)가 하중에 의해 발생하는 모멘트(Mu)를 충족시킬 수 있는 것이다.In the above condition, if H> D, then D ≥ 0.442H

> Mu, ie, the composite resistance moment of the slab and the mold (

) Can satisfy the moment (Mu) generated by the load, and if H <D, H ≥ 0.439D

> Mu, ie, the composite resistance moment of the slab and the mold (

) Can satisfy the moment (Mu) generated by the load.

Therefore, the slabs are disposed between the stepped edges formed at the upper edges of the respective molds, so that the upper surface of the slab is integrated in the same manner as the upper surface of the mold, so that the work of arranging the slabs progresses according to the installation site, Since the weight of the slab is reduced and the remaining portion except the edge of the edge is protruded from the mold, the sectional rigidity of the mold is improved, and the combination of the horizontal mold and the vertical reinforcement formed at the lower molds, It is effective. In addition, the upper surface of the mold and the slab are located on the same line, that is, the shape of the mold is lowered and the shape of the bridge can be increased.

7-11, the end molds 2110 and 2120 are rectangular and have a seating surface 2114 and 2124 and a side surface 2113 and 2123 on one side of the upper flange, The protrusions 2111 and 2121 are formed and the protrusions except for the stepped portions 2111 and 2121 formed on one side of the upper flange form the upper faces 2112 and 2122. [

The central mold halves 2130, 2140 and 2150 are rectangular in shape and have stepped surfaces 2132, 2135, 2142, 2145, 2152 and 2155 and side surfaces 2133, 2136, 2143, 2146, 2153 and 2156 on both sides of the upper flange. 2141, 2137, 2144, 2147, 2154 and 2157 are formed on the upper flange and the projections excluding the stepped portions 2134, 2137, 2144, 2147, 2154 and 2157 formed on both sides of the upper flange are formed on the upper faces 2131, . In other words, the central molds 2130, 2140 and 2150 are formed in a 'convex' shape in which both sides of the upper flange of the rectangular mold are processed.

And the end molds and the central molds 2110, 2120, 2130, 2140, 2150 may be placed in contact with or close to each other. By changing the shapes of the end molds and the central molds and arranging them mutually, stable installation and weight reduction can be achieved. In addition, at least one central mold positioned between the end molds 2110 and 2120 located at both ends of the upper part of the lower structure 2000 may be installed according to the construction conditions.

The top slopes of the slabs 1200 individually accommodated between the steps 2111, 2121, 2134, 2137, 2144, 2147, 2154, and 2157 provided in the end molds and the central molds 2110, 2120, 2130, 2140, 2120, 2134, 2137, 2144, 2147, 2134, 2134, 2134, 2131, 2131, 2131, 2131, 2131, 2131, 2150, and 2150 provided on the end molds and the center molds 2110, 2124, 2132, 2135, 2142, 2145, 2152, 2155 and the upper surfaces 2112, 2122, 2131, 2141, 2151 of the slabs 2154, 2157 are formed to be equal to the inclination angles of the slopes of the upper surface of the slab .

The upper structure 1000 may form a barrier wall 1300 and a package layer 1400 and a safety guide 1310 may be further installed on the barrier wall 1300.

2121, 2134, 2137, 2144, 2147, 2154, 2157 so that the synthesis of the end molds and the central molds 2110, 2120, 2130, 2140, 2150 and the slab 1200 can be made strong. The vertical reinforcement 3001 protruding from the side surfaces 2113, 2123, 2133, 2136, 2143, 2146, 2153 and 2156 and the vertical And a reinforcing bar 3002 may be provided.

Conditions and effects such as the installation depth of the seating surface for synthesizing the slab and the mold of another embodiment of the present invention, the installation height of the side surface, and the position of the vertical reinforcement and the horizontal reinforcement are described in the above embodiment.

Mortar grooves M can also be formed in the upper edges of the end molds and the central molds 2110, 2120, 2130, 2140 and 2150 and the end molds and the central molds 2110, 2120, 2130, 2140 and 2150 The backup material M3 can be installed so that the mortar M2 is not leaked to the gap g when it is arranged to have a certain clearance g by the design tolerance.

A method of constructing a bridge using the superstructure of the present invention is directed to a method of constructing a bridge using the bridge superstructure according to any one of claims 1 and 6, comprising the steps of: (a) And a central mold (S 10); (b) installing (S 20) a slab between the edges of the upper flange of the adjacent end mold and the middle mold; (c) installing (S30) a packaging layer on the end molds, the middle molds and the slabs, and in the step (b), if the end molds and the central mold are square, And a step (S40) of installing a backup material in a gap between the central molds and filling the mortar with the mortar.

1110, 1120, 2110, 2120,: End mold
1120, 1130, 1140, 1150, 2120, 2130, 2140, 2150:
1111, 1121, 1134, 1137, 1144, 1147, 1154, 1157, 2111, 2121, 2134, 2137, 2144, 2147, 2154,
1112, 1122, 1131, 141, 1151, 2112, 2122, 2131, 2141, 2151:
1113, 1123, 1133, 1136, 1143, 1146, 1153, 1156, 2113, 2123, 2133, 2136, 2143, 2146, 2153,
1114, 1124, 1132, 1135, 1142, 1145, 1152, 1155, 2114, 2124, 2132, 2135, 2142, 2145, 2152,
1200: Slab 1400: Packing layer
2000: Substructure
3001: horizontal reinforcement 3002: vertical reinforcement
H: Installation height D: Installation depth
d1, d2: effective depth
g: niche M1: mortar groove
M2: Mortar M3: Backup material

Claims (8)

Substructure;
End molds located at both ends of the upper portion of the substructure;
A step formed on one side of the upper flange of the end mold;
At least one middle mold positioned between the end molds;
A step formed at both side portions of the upper flange of the at least one center mold; And
Wherein the end mold and the center mold are &lt; RTI ID = 0.0 &gt; I '&lt; / RTI & And a vertical reinforcing bar protruding from the seating face of each of the upper flange steps. The upper face of the upper flange and the upper face of the slab are located on the same line except for the step and central step formed on the upper flange of the end casting , The lateral mounting height (H) of the upper flange step of the end mold and the central mold and the mounting surface mounting depth (D) of the upper flange step
(1) When H> D, D ≥ 0.442H,
(2) when H &lt; D, H &gt; = 0.439D
Bridge structure with improved stiffness.
delete delete delete delete The method according to claim 1,
Wherein a seating face of each of the upper flange steps of the end mold and the central mold has the same inclination angle as the slope of the upper surface of the slab.
A method of constructing a bridge using the bridge superstructure of claim 1 or 6,
(a) placing an end mold and a middle mold on top of a substructure including alternating or piercing;
(b) installing a slab between the edge of the upper flange of the adjacent end mold and the middle mold;
(c) installing a package layer on the end mold, the middle mold, and the slab top surface.
8. The method of claim 7,
And a step of installing a backup material in a gap between the end mold and the center mold and filling the mortar in the mortar groove when the end mold and the center mold are square in the step (b). Construction method of bridges.

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