KR102027480B1 - Construction method for the rahmen bridge using facing of geosynthetics reinforced soil retaining wall - Google Patents

Abstract

The present invention provides a construction method for a Rahmen bridge using a front wall of a reinforced soil retaining wall, which comprises the following steps of: constructing a base portion in a lower portion of a front side of each of reinforced soil planned on both sides; constructing a plan reinforced soil body on a rear surface of the constructed base portion; forming an abutment at an upper side of the base portion; and constructing a bridge in the shape of connecting upper portions of the abutment at both sides. The step of forming the abutment more comprises the following steps of: installing a base rebar to form an upper abutment of the plan reinforced soil body and the base portion, and connecting the plan reinforced soil body to the installed base rebar using a connection rebar; and installing an L-shaped upper bending beam portion at an upper side of the abutment.

Description

Construction method for the rahmen bridge using facing of geosynthetics reinforced soil retaining wall}

The present invention relates to a bridge installation method, and more particularly to a ramen bridge construction method.

1 is a view schematically showing a load and a bending moment applied to a conventional bridge. As shown in Fig. 1, the upper and lower structures of the basic bridge are connected to the steel sections, thereby increasing the rigidity of the entire structure and at the same time reducing the magnitude of the bending moment occurring in the ground, and acting on the lower ends of the shifts. The bending moment is greatly increased. Therefore, disadvantages arise such that the thickness of the alternation becomes thick and the size of the alternating lower foundation increases.

2 is a view schematically showing a construction procedure of a conventional ramen bridge. Conventional ramen bridges are made of solid support over weathered rock. Thus, if bedrock does not emerge early, it supports the shift foundation with piles.

In addition, such a ramen bridge is constructed in the order of establishing the foundation and the shift, and tightening the upper sleeve (or the girder) and the shift. After this ramen bridge is built, the back is filled with backfilling soil. By the way, as shown in Fig. 3 (c), the horizontal earth pressure caused by the weight of the earth body of the backfilling soil is additionally acted on the shift, the size of the shift and the basis of the shift is increased.

3 and 4 illustrate a method of joining a beam installed on an alternating upper portion of an H-beam shape and a sleeve beam forming a girder in a conventional composite ramen bridge.

As shown in FIGS. 3 and 4, the beams 11 and 12 are coupled in vertical contact with each other using a joint board 13, in which case there is a tendency to be weak in the stress applied to the front end of the coupling.

In order to compensate for this, a technique of the same method as shown in FIG. 5 is also proposed, but even in this case, it may bring strong structural durability to the vertical load, but is vulnerable to the horizontal shear stress that crosses the sleeve longitudinal direction.

On the other hand, the method of alternately utilizing the front wall of the conventional reinforcement soil retaining wall in order to reduce the horizontal earth pressure applied to the back ground sewage alternately, as shown in Figure 6, the risk of collapse of the front wall block or panel itself over time Therefore, a problem arises that the alteration also can be broken eventually due to the deformation.

Accordingly, there is a need for a method of installing a ramen bridge that is stable and economical in construction.

Accordingly, there is a need for a bridge installation method capable of stable and economical construction.

KR 10-2002-0015141 A

The present invention has been made to solve the above-mentioned problems and drawbacks, the present invention provides a method for constructing a ramen bridge that can significantly improve the safety of the entire bridge by minimizing the side load and moment applied to the bridge The purpose is.

In addition, it is an object of the present invention to provide a ramen bridge construction method is made so that the coupling degree of the assembly portion is improved when the alternating installation and beam installation.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the present invention comprises the steps of building a base in the lower front side of each of the reinforcement soil is planned to both sides; Constructing a plan reinforcement body on the constructed base portion back; Forming an alternating portion above the base portion; And constructing a bridge in a form of connecting the upper sides of the shifts, and the forming of the shifts includes installing the foundation reinforcement to form the constructed plan reinforced body and the upper portion of the foundation. Connecting the installed basic reinforcement to the plan reinforced body using a connecting reinforcing bar; It provides a ramen bridge construction method using the front wall of the retaining soil retaining wall further comprising the step of installing a "b" shaped upper bending beam portion on the upper side of the shift.

Here, the planed reinforcement body, the step of crushing the base plate, the step of installing the main reinforcement material on the chopped base plate, the step of installing the support frame to the upper portion of the main reinforcement material, and install the auxiliary reinforcement material to the upper portion of the support frame And installing the crushed stone to the upper portion of the installed auxiliary stiffener, and then rotating the shear of the auxiliary stiffener to cover the outside of the installed crushed stone in close contact, but not being in close contact with the crushed stone in the rotated auxiliary stiffener. Allowing the portion to lie on the upper side of the support frame along the longitudinal direction toward the rear side of the support frame; and maintaining the front end of the main reinforcement to keep the crushed stone in close contact with the front of the support frame. The outer reinforcement of the crushed stone with the auxiliary reinforcement to be in close contact, the portion of the main reinforcement that is not in close contact with the crushed stone Positioning the main reinforcement and the auxiliary reinforcement to be in close contact with the support frame in the longitudinal direction toward the rear side of the support frame in the longitudinal direction toward the rear side of the support frame; Comprising the step of completing the unit reinforcement body comprising the step of laying the backfill soil to the rear side where the crushed stone is installed while maintaining the state in which the crushed stone is in close contact with the front of the support frame, the completed unit It can be achieved by constructing the reinforcement soil in multiple layers up to the planned height.

In addition, the shift is installed so that the partial shift portion and the beam portion are alternately arranged and at the same time the partial shift portion is arranged at the top, and the upper bent beam portion is installed above the partial shift portion disposed at the uppermost portion, and both shift upper portions The sleeve beam unit is installed in the form of connecting the upper bent beam portion installed in the, the upper bent beam portion is provided with a connection horizontal beam and a connection vertical beam, the connection vertical beam protrudes to one side of the connection horizontal beam a predetermined length The sleeve beam portion includes a central horizontal beam and a central vertical beam, the central vertical beams are formed in recessed shapes so as to correspond to the protruding length of the connection horizontal beam on both sides, and the upper bent beam portion and the sleeve When the beam unit is connected along the longitudinal direction, the connecting vertical beam is inserted into the pair of central horizontal beams, thereby providing the center vertical beams. And it may be formed of a made up coupling type.

In addition, a joint board may be further provided to couple the upper bent beam part and the sleeve beam part while the upper bent beam part and the sleeve beam part are connected to each other.

The ramen bridge construction method of the present invention configured as described above has the following effects.

Ramen bridge according to an embodiment of the present invention, after applying the planed reinforcement to the alternating side, by building a shift in the form of connecting to the planed reinforcement body to minimize the side load and moment to be applied to the overall shift and only vertical load to the shift This ensures a significant improvement in the structural stability of the entire bridge.

In addition, the present invention by applying the partial shift portion and the beam portion continuously applied to the upper base of the alternating lower portion, but the basic configuration of the base portion and the beam portion or partial alternating portion is separated, thereby reducing the eccentric moment of the base portion significantly The width can be reduced considerably.

In addition, the present invention is to be made in the form of the upper girder beam portion and the sleeve beam portion is connected to the girder portion forming the bridge, the vertical bending portion of the upper bent beam portion and the sleeve beam portion is arranged to be secured structural safety at the connecting portion of both members It will be possible to increase the ease of installation work.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a view schematically showing a load and a moment applied to a conventional bridge;
2 is a view schematically showing a state in which a conventional ramen bridge is constructed and side loads applied to the alternating bridges;
3 and 4 schematically show the connection of the upper beams forming a girder according to the prior art;
5 is a view showing a connection according to another form of the upper beams forming a girder according to the prior art;
6 is a photograph showing the collapse of the retaining wall;
7 to 9 are diagrams showing a state to build a plan reinforced soil by stacking the unit reinforced soil after building the foundation;
10 is a view schematically showing how to build a unit reinforced soil;
11 and 12 are views schematically showing a process in which the shift is formed above the base portion;
13 and 14 are views sequentially showing a state in which a girder portion is formed connecting the alternating upper sides of the constructed;
15 is an exploded perspective view schematically showing how the upper bent beam portion and the sleeve beam portion are connected;
16 is a side view showing a state in which the joint board is applied after the upper bent beam portion and the sleeve beam portion is connected;
17 is a side view showing another form in which the upper bent beam portion and the sleeve beam portion are connected; And
18 is a perspective view schematically showing a bridge to which three shifts are applied.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of this embodiment, the same name and the same reference numerals are used for the same configuration and additional description thereof will be omitted.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of this embodiment, the same name and the same reference numerals are used for the same configuration and additional description thereof will be omitted.

7 to 9 are diagrams showing a state of constructing the reinforced structure by stacking the unit reinforcement body after building the foundation, Figure 10 is a view showing a state of constructing the unit reinforcement body.

First, as shown in FIG. 7, the foundation 120 is formed in the lower part of the terrain to the front side of each of the shifts and the plan reinforcement bodies to be built on both sides.

The foundation 120 is preferably built in a state buried in the terrain. In addition, the base 120 may be made of concrete and a precast method may be applied.

 Next, after arranging the periphery of the terrain to build the ramen bridge to the rear side of each of the two sides of the base 120, the step of constructing the plan reinforced soil 112 in a predetermined spaced position on both sides of the arranged terrain.

The planned reinforcement body 112 is constructed in a manner that the unit reinforcement body 110 is laminated in a multi-layer up to the planned height, the unit reinforcement body 110 is a crushed stone 106 and the crushed stone 106 Support frame made of steel supporting the front end of the auxiliary reinforcing material 105 and the auxiliary reinforcing material 105 in a wrapped state and the auxiliary reinforcing material 105 to maintain a constant state of wrapping the crushed stone 106 ( 103, backfilling soil 107 which is installed in the support frame 103 and filled in the rear of the support frame 103, the crushed stone 106, and the crushed stone 106, and the support frame 103. The secondary reinforcing material 105 and the crushed stone 106 may be composed of a reticulated main reinforcement 101 installed on the ground at the same time.

Here, the crushed stone 106 serves to effectively compact the front portion of the unit reinforcement body 110 and to minimize the compression deformation of the constructed reinforcement structure body 112.

The main reinforcing material 101 is made of geotextiles, and the auxiliary reinforcing material 105 is made of planar geotextiles composed of lattice denser than the main reinforcing material 101 as a plane.

In addition, the auxiliary reinforcing material 105 is tightly wrapped around the crushed stone 106, it is preferable to apply a geogrid (geogrid) having a compact lattice structure to prevent the outflow of the crushed stone 106.

Here, even if the auxiliary reinforcing material 105 is ductile, the strain rate is large, and thus the main reinforcing material 101 does not maintain sufficient rigidity, since the outer main reinforcing material 101 has sufficient rigidity, sufficient resistance to friction can be ensured, thereby supporting the support frame 103. Between the auxiliary reinforcement 105 is not opened, and thus construction of the normal unit reinforcement body 110 is possible without the phenomenon that the crushed stone 106 is lost or the backfilling soil 107 is collapsed during construction.

In addition, the support frame 103 is a horizontal mesh form in which the reinforcing bars 121 are crossed in the longitudinal and horizontal directions, and the front end is bent upward. The front end of the support frame 103 supports the crushed stone 106 is not recessed forward and at the same time to set the standard so that the front surface of the completed unit reinforced soil 110 can maintain a constant vertical smoothness.

On the other hand, the main reinforcing material 101, auxiliary reinforcing material 105 and the support frame 103 is preferably fixed to the support pin 104 to prevent flow in the installation process of the crushed stone 106.

11 and 12 are diagrams schematically illustrating a process of forming an alternating portion above the base portion.

As shown in the drawing, after the planned reinforcement soil is constructed, the step of forming the shift 130 above the foundation 120 is performed.

The shift 130 may be a form in which the concrete retaining wall is constructed as a whole by applying the reinforcement to the reinforcing bars and building the formwork, or one beam is installed in the vertical direction, but in the present embodiment As shown, the partial shift portion 132 made of a precast method or in-site casting method and the steel material and the H-beam beam portion 134 is alternately arranged along the up and down height direction in which the alternating construction to the planned height It is done in a continuous application way.

At this time, the partial shift portion 132 is formed at the top end.

In addition, the partial shift portion 132 is arranged such that the upper bending beam portion 140 having a “a” shape at the top end is formed to face each other in a protruding direction.

In this case, an installation plate 137 parallel to an upper surface of the partial shift unit 132 is provided below the upper bending beam unit 140, and the installation plate 137 is bolted to the partial shift unit 132. Can be combined.

On the other hand, although not shown in detail, the base reinforcement is applied to the partial shift portion 132 and the beam 134 outside to a certain height and the formwork is applied to the outside of the base reinforcement so that concrete is poured into the form as described below can do.

In this case, the base reinforcement or beam portion 134 and the support frame 103 of the planned reinforced earth body 112 is connected to each other by using a connecting reinforcement 138 having a separate stiffness by welding or the like. It is preferable to form a plan reinforced reinforcement body 112 and the shift 130 is integrated, and both ends of the connecting reinforcement 138 may form a welded joint to the support frame 103 or the basic reinforcement. have.

Finally, after the formwork is applied to the outer side of the reinforcing bar, concrete is poured in the form of covering the exterior of the partial shift unit 132 and the beam unit 134 at the same time to form a final shift 130.

13 and 14 are views sequentially showing a state in which the girder 188 is formed to connect the constructed upper sides alternately.

As shown, the process of installing the sleeve beam portion 150 in a form in which one side and the other side is connected to the upper bent beam portion 140 provided on the upper sides of the partial shift portion 132.

In addition, the reinforcement concrete portion 187 that is bent in a form corresponding to the shape of the upper bending beam portion 140 may be applied to both lower upper bending beam portions 140.

Meanwhile, as shown in FIGS. 15 and 16 illustrating a coupling relationship between the upper bent beam part 140 and the sleeve beam part 150, the upper bent beam part 140 has a pair of horizontally bent portions on the upper part. It comprises a connection horizontal beam 141 and a connection vertical beam 143 is installed to traverse the center portion of the connection horizontal beam 141 vertically, the connection vertical beam 143 is a predetermined length (L) of the connection It is made to protrude to one side of the horizontal beam (141).

In addition, the sleeve beam unit 150 also includes a pair of central horizontal beams 151 and a central vertical beam 153, wherein the central vertical beams 153 protrude lengths of the connection horizontal beams 141 to both sides. It is made of a form drawn in each so as to correspond to (L).

Accordingly, the connection vertical beam 143 is inserted into the center horizontal beam 151 of the sleeve beam part 150 when the upper bent beam part 140 and the sleeve beam part 150 are connected in the longitudinal direction, and the connection vertical beam is vertically connected. The beam 143 and the central vertical beam 153 are made to be in the form of a matched mesh.

Here, when the height of the connection vertical beam 143 is H, it is preferable to make H / 2 smaller than L, that is, H / 2 <L state.

In addition, as shown in FIG. 16, in the state where the upper bent beam part 140 and the sleeve beam part 150 are engaged with each other, a joint board 160 and a connection part of the connection vertical beam 143 and the center vertical beam 153 are provided. It is preferable to firmly couple both members using the coupling bolt 162.

The combination of the upper bending beam portion 140 and the sleeve beam portion 150 having the connection vertical beam 143 protruding and the center vertical beam 153 protruded in this way is the connection of the vertical vertical beam 143 and the center vertical beam introduced. By using 153, the primary fixing operation of both members can be easily performed, and structurally more firmly coupled can be achieved.

As another embodiment, as shown in FIG. 17, the junction portion of the connection vertical beam 143 and the center vertical beam 153 may be formed in a two-fold bent shape in a zigzag form from the upper side to the lower side.

In this case, as well as the primary fixing operation of the two members (140, 150) is easily made, it is possible to achieve a more structurally secure coupling state.

Referring back to FIGS. 13 and 14, after coupling the upper bent beam part 140 and the sleeve beam part 150 and the coupling and installation of the upper bent beam part 140 and the sleeve beam part 150 are completed, the coupling is performed. After reinforcing the basic reinforcing bar 173 toward the upper bent beam part 140 and the sleeve beam part 150, the mortar or concrete, etc. in a form to cover the surrounding topography and the upper bent beam part 140 and the sleeve beam part 150. The final girder 188 construction is completed by constructing the alternating upper filling unit 180.

On the other hand, such a ramen bridge, as shown in Figure 18, three or more shifts 130 to be applied, the shift may be applied in the form of connecting the upper portion of the adjacent shift (130).

In this case, the upper portion of the upper portion of the bent beam portion 240, which is bent and divided into two sides, may be applied.

As described above, a preferred embodiment according to the present invention has been described, and the fact that the present invention can be embodied in other specific forms in addition to the above-described embodiments without departing from the spirit or scope thereof has ordinary skill in the art. It is obvious to them. Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive, and thus, the present invention is not limited to the above description and may be modified within the scope of the appended claims and their equivalents.

112: planned reinforced soil 110: unit reinforced soil
120: base 130: shift
132: partial shift unit 134: beam unit
140: upper bending beam portion 141: connecting horizontal beam
143: connection vertical beam 150: sleeve beam portion
151: center horizontal beam 153: center vertical beam

Claims (4)

Constructing a foundation in the lower portion of the front side of each of the reinforcement soils planned for both sides; Constructing a plan reinforcement body on the constructed base portion back; Forming an alternating portion above the base portion; And constructing a bridge in a form of connecting the upper sides of the alternate parts.
The forming of the shift may include installing a foundation reinforcement and connecting the installed foundation reinforcement with a connection reinforcement body to form the constructed reinforced structure and the upper portion of the foundation; And installing a "b" shaped upper bent beam part on the upper side of the shift.
The planned reinforcement body, the step of crushing the base plate, the step of installing the main reinforcement material on the chopped base plate, the step of installing the support frame to the top of the main reinforcement material, the step of installing the auxiliary reinforcement to the top of the support frame And, after installing the crushed stone to the upper portion of the installed auxiliary reinforcement and the front end of the auxiliary reinforcement is rotated to wrap in close contact with the outside of the installed crushed stone, the portion of the auxiliary reinforcement is not in close contact with the crushed stone Placing the upper portion of the support frame along the longitudinal direction toward the rear side of the support frame; and maintaining the front end of the main reinforcement to keep the crushed stone in close contact with the front of the support frame; The outer portion of the crushed stone to be in close contact with, and the portion of the main reinforcing material that is not in close contact with the crushed stone is Placing an upper portion of the support frame along the longitudinal direction toward the rear side of the support frame, and fixing the main reinforcement and the auxiliary reinforcement installed on the support frame to be closely adhered along the longitudinal direction toward the rear side of the support frame; Comprising the step of completing the unit reinforcement body comprising the step of laying the backfilling soil to the rear side where the crushed stone is installed while maintaining the state in which the crushed stone is in close contact with the front of the support frame, the completed unit reinforcement body It is made by building a multi-layer up to the planned height,
The shift is provided so that the partial shift portion and the beam portion are alternately arranged and at the same time the partial shift portion is arranged at the top.
The upper bending beam part is installed above the partial shift part disposed at the top end,
On the lower side of the upper bending beam part is provided an installation plate parallel to the upper surface of the partial shift portion through the bolt coupling,
The sleeve beam portion is installed in the form of connecting the upper bent beam portion installed on both sides of the shift,
The upper bending beam part includes a connection horizontal beam and a connection vertical beam, wherein the connection vertical beam is formed to protrude to one side of the connection horizontal beam by a predetermined length.
The sleeve beam portion includes a center horizontal beam and a center vertical beam, and the center vertical beams are formed in recessed shapes so as to correspond to the protruding lengths of the connection horizontal beams on both sides thereof, and the upper bent beam portion and the sleeve beam portion in the longitudinal direction. The connecting vertical beam is inserted into the pair of central horizontal beams and connected to the central vertical beams while connecting the vertical vertical beams. The length of the connecting vertical beams protruding toward one side of the connecting horizontal beams is L. When the length between the connecting horizontal beam is H, H / 2 <L to achieve a state,
A joint board is further provided to couple the upper bending beam part and the sleeve beam part in a state in which the upper bending beam part and the sleeve beam part are connected. The joint board is connected to the connection horizontal beam in a state in which the connection horizontal beam and the central horizontal beam are connected. And a joint board coupled to the central horizontal beam at the same time, and a joint board coupled to the joint vertical beam and the central vertical beam at the same time in which the connection vertical beam and the central vertical beam are connected.
The reinforcement concrete portion bent in a shape corresponding to the shape of the upper bent beam portion is applied in close contact with the lower sides of the upper bent beam portion to support an end of the sleeve beam portion.
Ramen bridge construction method using front wall of reinforced earth retaining wall. delete delete delete

Images