KR100823348B1 - Installation method of a retaining wall - Google Patents

Abstract

A construction method of a steel-composite retaining wall is provided to shorten a period of construction and to improve economical efficiency by manufacturing a front panel installed to H-beams in advance, and to reduce earth pressure added on a retaining wall and to improve durability of a retaining wall by forming a front panel with plural concrete panels. A construction method of a steel-composite retaining wall comprises the steps of: forming a concrete foundation(10) by placing concrete on the ground along an installation line of a retaining wall at the front of an excavation surface; installing plural posts(20) composed of plural H-beams on the concrete foundation at regular intervals; installing a front panel(30) composed of plural concrete panels at the front of the posts to support earth pressure occurring on a banking layer and to prevent the breaking of a banking layer; installing a form around the post and placing concrete to surround two sides and the rear side of the posts; placing filling aggregate having a diameter of below 25mm in the concrete placed and hardened around the posts; and filling up the space among the posts, the filling aggregate and the excavation surface with soil.

Description

Installation method Of A Retaining Wall

The present invention relates to a method for constructing a composite retaining wall, and more particularly, to a method for constructing a composite retaining wall which can shorten the construction period of the retaining wall and secure economical efficiency by improving workability in the field.

In general, the retaining wall is a structure formed to prevent the soil from being collapsed by its own weight or by natural conditions such as rainwater.

Most of the retaining wall structures are constructed by placing concrete foundations on the concrete foundations and placing H beams on the foundations of concrete, and then placing concrete in the formwork after installing the formwork to install the front panel around the H beams. It is adopted.

However, in the conventional method as described above, since the concrete is poured directly at the work site where the retaining wall structure is to be installed in order to make the front panel, the work time is increased so that the construction period is extended and the work cost is increased accordingly. Holding it. In more detail, there is a problem in that the construction period is long because all work is stopped until concrete is mixed by manufacturing concrete at the work site to make the front panel and then placing concrete in the formwork to harden the poured concrete.

The present invention has been made to solve the above problems of the prior art, the front panel to be installed in the H-beams in advance in the production site other than the work site to shorten the construction period and thereby improve the economical The purpose is to provide a composite retaining wall construction method.

In addition, the front panel is composed of a plurality of concrete panels assembled, thereby providing a rigid composite retaining wall construction method that can weaken the earth pressure applied to the retaining wall by leaking water into the gap between the assembled concrete panels. have.

Steel composite wall construction method according to the present invention for solving the above problems is the step of forming a concrete foundation for placing concrete on the ground along the retaining wall installation line in front of the excavation surface, and a plurality of H beams in the concrete foundation And a step for installing a support stand for arranging a plurality of support posts which are assembled in a predetermined direction, and a front panel installation step for installing a front panel, in which a plurality of pre-fabricated concrete panels are assembled up, down, left and right, on the front of the support post; And a holding concrete placing step of placing concrete around the holding stand so as to surround both sides and the back of the holding stand, and a filling aggregate filling step for filling the filling aggregate between the holding concrete, and between the holding stand and the filling aggregate and the gulto-myeon. It consists of a fill layer forming step to fill the soil.

In addition, the concrete panel has a rectangular parallelepiped body portion, an upward protrusion projecting to a predetermined height from the front upper end of the body portion, a downward protrusion projecting to a predetermined height from the rear lower end of the main body portion, the predetermined at the front left end of the body portion It consists of a left-projection projecting in height and a right-projection projecting from the rear right end of the body portion to a predetermined height, the downward projection of the concrete panel disposed on the upper side is seated on the upper end of the body portion of the concrete panel disposed on the lower side, left The right projecting part of the concrete panel arranged in the contact with the left end of the main body of the concrete panel arranged on the right. At this time, the concrete panel disposed in the odd-numbered layer from the bottom of the concrete panel is the center of the body portion is coupled to the strut, the concrete panel disposed in the even layer is coupled to both ends of the body portion.

The steel composite retaining wall construction method according to the present invention configured as described above does not have to wait for concrete panels to be hardened by placing them in the field because the concrete panels constituting the front panel are manufactured in advance at the place other than the work site. There is an advantage that the construction period is shortened and thus the cost for retaining wall construction is reduced.

In addition, since a plurality of concrete panels are assembled to make the front panel, water leaks between the assembled concrete panels, thereby reducing the earth pressure applied to the retaining wall, thereby improving the durability of the retaining wall.

In addition, a plurality of concretes are formed in such a manner that the downward protrusions of the concrete panels are seated on the upper end of the main body part of the concrete panels arranged on the lower side, and the right protrusions of the concrete panels arranged on the left side are in close contact with the left end of the main body parts of the concrete panels arranged on the right side. Since the panel is assembled, there is an advantage that can improve the robustness of the front panel.

Hereinafter, with reference to the accompanying drawings an embodiment of a rigid synthetic retaining wall construction method according to the present invention will be described in detail.

1 is a flow chart of a method for constructing a composite retaining wall according to the present invention.

2 is a rear view of the steel composite retaining wall installed by the construction method according to the present invention, FIG. 3 is a sectional view taken along the line A-A of FIG. 2, and FIG. 4 is a sectional view taken along the line A'-A 'of FIG.

In addition, Figure 5 is an exploded perspective view showing a model of the strut used in the method for constructing a composite retaining wall according to the present invention.

In addition, Figure 6a is a perspective view showing a front view of the concrete panel used for the odd layer in the method of constructing the composite retaining wall according to the present invention, Figure 6b is a concrete used for the odd layer in the method of constructing a composite retaining wall according to the present invention This is a perspective view of the panel from the back.

In addition, Figure 7a is a perspective view showing the front of the concrete panel used in the even layer in the method of constructing the composite retaining wall according to the present invention, Figure 7b is the concrete used in the even layer in the method of constructing the composite retaining wall according to the present invention This is a perspective view of the panel from the back.

Steel composite wall construction method according to the present invention is the concrete foundation portion forming step (S100) for placing concrete on the ground along the retaining wall installation line in front of the excavation surface, a plurality of H beams 21 on the concrete foundation portion 10 The holding unit installation step (S200) for arranging a plurality of holding units 20, which are assembled in the vertical direction, at predetermined intervals, and the front panel 30 in which the plurality of concrete panels 31 prepared in advance are assembled up, down, left and right. Front panel installation step (S300) for installing the front of the support stand (20) and the concrete holding step for placing concrete around the support stand 20 so as to surround both sides and the back of the support stand (20) Filling aggregate filling step (S500) and filling the filling aggregate 50 between the holding concrete 40 (S400) and fill the soil between the holding stand 20 and the filling aggregate 50 and the pit soil surface It is composed of a layer forming step (S600).

The bottom portion of the support base 20 is buried in a predetermined portion to the concrete foundation portion 10 made in the concrete foundation portion forming step (S100) to be fixed. At this time, since the holding post 20 is formed by assembling the plurality of H beams 21 in the vertical direction, the H beam 21 of the H beam 21 disposed at the lower end of the H beam 21 constituting the holding post 20 is formed. The lower predetermined portion is to be buried in the concrete foundation (10). In other words, when placing concrete to make the concrete foundation 10 at the site where the retaining wall is to be installed, the lower portion of the H beam 21 disposed at the lowermost side of the support base 20 is the concrete foundation. It is to harden the concrete foundation 10 while buried in the concrete to make (10).

The holding stage installation step (S200) is a process of assembling a plurality of H-beams 21 on the upper side of the H-beams 21 hardened like concrete by being buried in the lower portion of the concrete base 10. That is, it is a process of installing the support base 20 which is a plurality of H beam assemblies at predetermined intervals of the concrete foundation part 10.

At this time, the support base 20 is composed of a plurality of H beams 21 having different sizes, a horizontal flange coupling panel 22 and a coupling flange coupling panel 23 for coupling the H beam 21.

The H beam 21 has a connecting flange 21-1 in the center, a first horizontal flange 21-2 extending from both ends of the connecting flange 21-1, and the connecting flange 21. It consists of the 2nd horizontal flange 21-3 extended to both sides at the rear end of -1).

The connection flange 21-1 is a connection flange coupling panel at a lower portion of the connection flange of the H beam disposed on the upper side of the plurality of H beams 21 assembled up and down and the upper portion of the connection flange of the H beam disposed on the lower portion ( 23) are bolted to be disposed on both sides with respect to the connection flange.

The second horizontal flange 21-3 is a lower portion of the second horizontal flange of the H beam disposed above and a second horizontal flange upper portion of the H beam disposed below the plurality of H beams 21 assembled up and down. Horizontal flange coupling panel 22 is arranged on both sides with respect to the second horizontal flange is bolted. As a result, the plurality of H beams 21 are firmly fixed in the vertical direction.

In addition, a plurality of fastening holes 21-3a are formed in the second horizontal flange 21-3 of the H beam 21, wherein the fastening holes 21-3a have an elliptical shape whose vertical direction is longer than the horizontal direction. Takes shape. As described above, the reason for forming the fastening hole 21-3a in the shape of a long oval in the vertical direction will be described later. This is because the protruded upward protrusions 31-2 and the downward protrusions 31-3 are formed. That is, in order to install another concrete panel on the upper part of the concrete panel arranged in the lower part, the concrete panel disposed in the lower part is connected to the fastening hole 21-3a formed in the second horizontal flange 21-3 of the H beam 21. The bolts are coupled, and the anchor bolts 31-1a of the concrete panels to be disposed thereon are inserted into the fastening holes 21-3a of the second horizontal flange 21-3, and then the upper concrete panels 31 are lowered. This is because the down projections 31-3 of the upper concrete panel may be seated on the top of the main body part 31-1 of the lower concrete panel without being disturbed by the upward projections 31-2 of the lower concrete panel. .

The front panel installation step (S300) is to secure the front panel 30 to the holding table 20 to support the earth pressure generated from the fill layer 60 to be made later, the fill layer 60 is collapsed It is a process to prevent it.

The front panel 30 is composed of a plurality of concrete panels 31 having the same size is assembled up, down, left and right, the fastening hole of the second horizontal flange (21-3) on the back of the concrete panel 31 An anchor bolt 31-1a fitted to 21-3a) is formed to protrude. When the anchor bolt 31-1a is fitted into the fastening hole 21-3a of the second horizontal flange 21-3, the end portion of the anchor bolt 31-1a passing through the fastening hole 21-3a is inserted into the fastening hole 21-3a. The front panel 30 is fixed to the strut 20 by spirally coupling the anchor nut 31-1c.

In more detail, the concrete panel 31 of the front panel 30 has a rectangular parallelepiped main body portion 31-1 having the anchor bolt 31-1a on its rear surface, and the main body portion 31-. 1) an upwardly protruding portion 31-2 protruding at a predetermined height from the front upper end, a downwardly protruding portion 31-3 protruding at a predetermined height from the rear lower end of the main body portion 31-1, and the main body portion ( And a leftward projection portion 31-4 protruding at a predetermined height from the front left end of 31-1) and a rightward projection portion 31-5 protruding at a predetermined height from the rear right end of the main body portion 31-1.

When assembling the concrete panel 31 configured as described above up, down, left, and right to make the front panel 30, the downward projections 31-3 of the concrete panel 31 disposed on the upper side are disposed on the lower side of the concrete panel 31. The right side projecting part 31-5 of the concrete panel 31 disposed on the left side is mounted on the upper end of the main body part 31-1 of the main body part 31-1, and the main body part 31-1 of the concrete panel 31 disposed on the right side thereof. Make sure that it is in close contact with the left end.

However, when the concrete panel 31 is disposed as described above, the concrete panel 31 is disposed on the downward projections 31-3 and the lower side of the concrete panel 31 disposed above by the external force during or after the assembly of the concrete panel 31. Since the friction between the upper end of the main body part 31-1 of the disposed concrete panel 31 may damage the concrete panel 31, the downward projection 31-3 of the concrete panel 31 disposed above and A packing 32 made of a rubber material is installed between the main body parts 31-1 of the concrete panel 31 disposed below.

The packing 32 has a rectangular parallelepiped body 32-1, a plurality of upper protrusions 32-2 protruding from an upper surface of the body 32-1, and a lower surface of the body 32-1. It is composed of one or more lower projections (32-3) formed to protrude on.

Since the packing 32 is configured as described above, a plurality of fitting holes 31-3a are formed at the bottom of the downward protrusion 31-3 of the concrete panel 31 so that the upper protrusion 32-2 may be fitted. At least one insertion hole 31-1b is formed on an upper surface of the main body part 31-1 of the concrete panel 31 so that the lower protrusion 32-3 may be fitted therein.

On the other hand, the concrete panel 31 is disposed in the odd numbered layer starting from the bottom of the concrete panel 31, a plurality of anchor bolts (31-1a) are formed in the center of the body portion 31-1, the anchor bolt An anchor nut 31-1c is fitted to the end of the anchor bolt 31-1a through which the 31-1a is fitted into the fastening hole 21-3a of the H beam 21 and passed through the fastening hole 21-3a. Is spirally coupled.

In addition, in the concrete panel 31 disposed on the even layer, a plurality of anchor bolts 31-1a are formed at both ends of the main body part 31-1, and the anchor bolts 31-1a form the H beam 21. The anchor nut 31-1c is helically coupled to the end of the anchor bolt 31-1a that is fitted into the fastening hole 21-3a and passes through the fastening hole 21-3a.

Therefore, the front panel 30 has a form in which one concrete panel disposed on the lower side contacts the two concrete panels disposed on the upper side in the vertical direction. This further improves the assembly robustness of the concrete panel 31.

The holding concrete pouring step (S400) is to install the formwork around the support stand 20 and to pour concrete in the formwork to combine the concrete and the support stand 20, in which the concrete casting range to the periphery of the support stand Only limited so that a predetermined space is formed between the concrete to be poured on the adjacent strut 20.

The filling aggregate filling step (S500) is a process of filling and compacting the filling aggregate 50 having a diameter of 25 mm or less between the holding concrete 40 placed and hardened around the holding stand 20, and the filling layer (after being made). 60) it is a process to let the water flowing out from the well. Therefore, water introduced from the fill layer 60 seeps into the filling aggregate 50, and the water soaked out flows into the gap between the concrete panels 31 assembled up, down, left and right, and from the fill layer 60. The earth pressure applied to the front panel 30 is prevented from increasing.

The fill layer forming step (S600) is a process of filling and sanding the soil in the space formed between the back and the filling aggregate 50 and the pit soil surface of the holding concrete (40) is poured around the support stand (20) .

1 is a flow chart of a method of constructing a composite retaining wall according to the present invention.

Figure 2 is a rear view of the steel composite retaining wall installed by the construction method according to the present invention.

3 is a cross-sectional view taken along the line A-A of FIG.

4 is a sectional view taken along line A′-A ′ of FIG. 2.

Figure 5 is an exploded perspective view showing a model of the struts used in the steel composite retaining wall construction method according to the present invention.

Figure 6a is a perspective view showing a front view of the concrete panel used in the odd layer in the method of constructing a composite retaining wall according to the present invention.

Figure 6b is a perspective view showing the appearance of the concrete panel used in the odd layer in the reinforced composite retaining wall construction method according to the present invention.

Figure 7a is a perspective view showing a front view of the concrete panel used in the even layer in the method of constructing a composite retaining wall according to the present invention.

Figure 7b is a perspective view showing the appearance of the concrete panel used in the even layer in the composite composite retaining wall construction method according to the present invention.

<Explanation of symbols on main parts of the drawings>

10: concrete foundation 20: props

21: H beam 21-1: connection flange

21-2: first horizontal flange 21-3: second horizontal flange

21-3a: Fastening hole 22: Horizontal flange coupling panel

23: connecting flange coupling panel 30: front panel

31: concrete panel 31-1: main body

31-1a: Anchor bolt 31-1b: Insertion hole

31-1c: anchor nut 31-2: upward projection

31-3: downward projection 31-3a: fitting hole

31-4: leftward protrusion 31-5: rightward protrusion

32: packing 32-1: body

32-2: Upper projection 32-3: Lower projection

40: holding concrete 50: filled aggregate

60: fill layer

Claims (7)

A concrete foundation forming step (S100) of placing concrete on the ground along the retaining wall installation line in front of the oyster surface; A support stand installation step (S200) of arranging a plurality of support posts 20 formed by assembling the plurality of H beams 21 in the vertical direction on the concrete foundation part 10 at predetermined intervals; A front panel installation step (S300) for installing the front panel 30, which is made of a plurality of pre-fabricated concrete panels 31, assembled in up, down, left and right, on the front surface of the support base 20; A holding concrete placing step (S400) for placing concrete around the holding stand 20 so as to surround both sides and the rear surface of the holding stand 20; Filling aggregate filling step (S500) to fill the filling aggregate 50 between the holding concrete 40; The construction of the composite retaining wall, characterized in that consisting of; holding step (20) and filling aggregate 50 and the fill layer forming step (S600) filling the soil between the oyster surface. The method according to claim 1, The holding table 20 includes a plurality of first and second horizontal flanges 21-2 and 21-3 formed at the front and rear ends of the connection flange 21-1 at the center and the connection flange 21-1. An H beam 21; A horizontal flange coupling panel 22 coupled to the first horizontal flange 21-2 or the second horizontal flange 21-3 of the adjacent upper and lower H beams among the plurality of H beams 21; And a connecting flange coupling panel (23) coupled to the connecting flanges (21-1) of adjacent upper and lower H beams among the plurality of H beams (21). The method according to claim 2, A plurality of fastening holes 21-3a are formed in the second horizontal flange 21-3 of the H beam 21, An anchor bolt 31-1a fitted into the fastening hole 21-3a of the second horizontal flange 21-3 protrudes from the rear surface of the concrete panel 31 of the front panel 30 to protrude the anchor bolt 31. -1a) Method for constructing a composite retaining wall, characterized in that the front panel 30 is fixed to the strut 20 by an anchor nut (31-1c) is coupled to the spiral. The method according to claim 3, The concrete panel 31 has a rectangular parallelepiped body portion 31-1 provided with the anchor bolt 31-1a and an upward protrusion portion projecting at a predetermined height from a front upper end of the body portion 31-1 ( 31-2), a downwardly protruding portion 31-3 protruding at a predetermined height from the rear lower end of the main body portion 31-1, and a leftward direction protruding at a predetermined height from the front left end of the main body portion 31-1. And a protrusion 31-4 and a rightward protrusion 31-5 which protrudes at a predetermined height from the rear right end of the main body 31-1. The downward projection 31-3 of the concrete panel 31 disposed on the upper side is seated on the upper end of the main body part 31-1 of the concrete panel 31 disposed on the lower side, and the concrete panel 31 of the concrete panel 31 disposed on the left side thereof. A method for constructing a composite synthetic retaining wall, wherein the right-facing protrusion 31-5 is in close contact with the left end of the main body 31-1 of the concrete panel 31 disposed on the right side. The method according to claim 4, In the concrete panel 31 disposed on the odd numbered layer from the lowermost side of the concrete panel 31, an anchor bolt 31-1a is formed at the center of the main body part 31-1 to fasten the hole of the H beam 21. An anchor bolt 31-1a is formed at both ends of the main body part 31-1 so that the concrete panel 31 coupled to the second layer 21-21a and the even layer is formed in the fastening hole of the H beam 21. 21-3a) method for constructing a composite retaining wall. The method according to claim 4, The front panel 30 is a rubber material packing provided between the downward protrusion 31-3 of the concrete panel 31 disposed above and the main body 31-1 of the concrete panel 31 disposed below. Steel composite retaining wall construction method characterized in that it further comprises (32). The method according to claim 6, The concrete panel 31 has a plurality of fitting holes 31-3a formed on the bottom surface of the downward protrusion 31-3 and at least one insertion hole 31-1b formed on the upper surface of the main body 31-1. The packing 32 is formed with upper and lower projections (32-2, 32-3) to be fitted to the fitting hole (31-3a) and the insertion hole (31-1b), the concrete disposed on the upper side The main body portion of the concrete panel 31 in which the upper protrusion 32-2 of the packing 32 is fitted into the fitting hole 31-3a formed in the downwardly protruding portion 31-3 of the panel 31 and is disposed below. A method for constructing a composite retaining wall, characterized in that the lower projection (32-3) is inserted into the insertion hole (31-1b) formed in the 31-1.

Images