KR20170035321A - Retaining wall construction method and retaining wall structure by the method - Google Patents

Abstract

The present invention relates to a method of constructing a retaining structure and a retaining structure for preventing the ground from collapsing during the excavation of a ground, and it is possible to easily apply it regardless of the structure of the ground constructed by the retention wall, Can be constructed.
A method of constructing an earth retaining structure according to the present invention comprises the steps of: a) advancing a primary turf; b) laying the primary reinforcing bars on the first ter- minal surface and installing the formwork; c) pouring and curing concrete in a space formed in step b) to complete a primary eutectic closure, and pouring concrete so that the lower end of a part of the primary reinforcing bars is not buried in the concrete; d) advancing the secondary turf; e) installing a secondary reinforcement on the second ter- minal surface, wherein in step c), connecting the vertical reinforcement of the first vertical reinforcement and the second vertical reinforcement which are not buried in the concrete, and installing the formwork; f) pouring and curing the concrete in a space formed by the step e) to complete a secondary earth retaining structure; placing a concrete so that a lower end portion of some of the secondary reinforcing bars is not buried in the concrete; And g) repeating steps d) through f).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retouched wall construction method and a retouched wall structure,

The present invention relates to a method of constructing a retaining structure and a retaining structure for preventing the ground from collapsing during a ground excavation, and more particularly, to a method of constructing a retractable multi-stage retaining structure capable of easily constructing without expensive equipment, ≪ / RTI >

When constructing a structure such as a building, the ground is excavated to form a foundation or an underground space of the structure. If there is no other structure around the structure to be constructed, it is possible to excavate the ground with the inclination of the safety angle. However, if there are other structures in the surrounding area, such as building the structure in the urban area, I do earthwork to do.

Typically, there is a retaining structure composed of an I-shaped steel pile inserted into the ground at intervals and a soil plate sandwiched between the I-shaped steel pile. Although the retaining wall is widely used, it needs to be separately worked in order to have a water-based property.

Another type of retaining structure is a retaining structure by CIP method or slurry wall construction method. Such retaining structure is excellent in water repellency, but it takes a lot of cost for construction and it is burdened to operate large equipment.

Also, when the lower part of the ground where the earth retaining walls are formed is formed of a rock, excavation work is not easy and the construction of the earth retaining wall becomes troublesome.

KR 10-1349299 B1 KR 10-0849226 B1

It is an object of the present invention to solve the problems of the prior art as described above, and it is an object of the present invention to provide a method of constructing a top-down multi-stage retaining structure that can be easily applied irrespective of the structure of an earth- And an object of the present invention is to provide a method for constructing the earth retaining structure and a retaining structure constructed thereby.

According to a preferred embodiment of the present invention, there is provided a method of constructing a retaining structure along a perimeter of a site, the method comprising the steps of: a) advancing a primary turf; b) laying the primary reinforcing bars on the first ter- minal surface and installing the formwork; c) pouring and curing concrete in a space formed in step b) to complete a primary eutectic closure, and pouring concrete so that the lower end of a part of the primary reinforcing bars is not buried in the concrete; d) advancing the secondary turf; e) installing a secondary reinforcement on the second ter- minal surface, wherein in step c), connecting the vertical reinforcement of the first vertical reinforcement and the second vertical reinforcement which are not buried in the concrete, and installing the formwork; f) pouring and curing the concrete in a space formed by the step e) to complete a secondary earth retaining structure; placing a concrete so that a lower end portion of some of the secondary reinforcing bars is not buried in the concrete; And g) repeating the steps d) to f). The method of constructing a top-down multi-stage earth retaining structure according to claim 1,

According to another embodiment of the present invention, a step of installing a wale beam of a reinforced concrete trough for stabilizing the ground surface is further performed before the step a) is further performed.

According to another embodiment of the present invention, in the step (f), the concrete is poured so that the upper end of some of the secondary reinforcing bars is not embedded in the concrete.

According to another embodiment of the present invention, in the steps b) and e), a process of installing a drain pipe on the ground surface of the terraces is performed together.

According to still another embodiment of the present invention, the steps d) to f) are performed on the periphery of the site after the steps a) to c) A top-down multi-stage earth retaining method is provided. In this case, before the step (a), the step of approximating the I-shaped section file I to the section boundary around the site may be further performed.

According to another embodiment of the present invention, there is provided an earth retaining structure constructed through the above construction method.

Since the earth retaining method according to the present invention progresses gradually from the upper part, it does not require large equipment and is economical. Since it proceeds while confirming the structure of the ground directly, it can immediately respond to the ground situation, It is possible to construct the earth retaining structure.

The retaining structure made by the above-mentioned construction method is constructed by dividing into plural stages on the height, but since the vertical reinforcing bars are continuously joined and integrated, they exhibit stable performance.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view showing a sequential construction method of a retaining structure according to the present invention; FIG.
2 is a sectional view of the earth retaining structure constructed by the construction method.
3 is an example of a case in which a retaining wall is installed in contact with the earth retaining structure.
Figs. 4 and 5 are explanatory diagrams for a case where construction is performed separately for each section on the periphery of the site during the earth retaining construction.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

The present invention relates to a method of constructing a retaining wall along a perimeter of a construction site and a retaining structure constructed by the method. In the past, the construction of the retaining wall has been carried out all over the entire depth of the planned earth retaining wall. It is possible to apply easily without any large equipment because the earthworks is constructed with many stages while proceeding deeply by the treading. The work is proceeded while confirming the structure of the ground directly, so that it can be applied regardless of the ground structure.

FIG. 1 shows a sequential construction method of the earth retaining structure according to the present invention, and FIG. 2 shows the earth retaining structure constructed by the construction method.

(C) a first concrete pouring / curing step, (d) a second concrete pouring step, (d) a second concrete pouring step, (C) installation and curing step, and (g) repeating steps (d) to (f) of the second concrete (C) .

Hereinafter, the method of constructing the earth retaining structure will be described step by step.

a) the step of advancing the primary turf (Fig. 1 (a));

Dismantle near the ground surface. Depending on the soil depth of the first tear-off, the depth should be 1 ~ 2m so that the ground is not collapsed without additional supporting means.

Before step a), installing a wreck beam B of a reinforced concrete trough to stabilize the ground surface may be further performed.

As shown in FIG. 2, the wristband beam B includes a reinforcing bar assembly including a plurality of horizontal reinforcing bars H disposed at intervals in a quadrangle and a stay S surrounding the horizontal reinforcing bars H, It is composed of concrete that is poured and cured so that the reinforcing steel assembly is buried, and it is constructed on the rim of the place where the primary terraces are made.

Since the wristband beam B can harden the non-dense ground surface compared to the lower ground, the first grounding work can be performed stably and the trenching can be performed to a deeper place.

Since the wristband beam B only serves to stabilize the ground surface, it is constructed to have a height of about 0.5 to 0.6 m.

As a means for stabilizing the ground surface, there may be a slab-shaped concrete plate D in addition to the wristband beam B. In FIG. 1, a concrete plate D may be applied.

b) installing the formwork F after the primary reinforcing bar R1 is laid on the primary surface of the first wave (Fig. 1 (b));

A reinforcing bar for forming a reinforced concrete reinforced concrete reinforced concrete reinforced concrete structure is disposed in contact with a primary terrace formed by proceeding to step a), and a mold F is installed.

The reinforcement of the primary reinforcing bar (R1) proceeds in the form of a horizontal lattice in the form of a horizontal reinforcing bar and a vertical reinforcing bar as in the case of forming a general reinforcing concrete reinforcing wall. And such a planar lattice-like assembly U allows multiple layers to be located on the thickness of the planned earth retaining clay. In FIG. 1 (b), it can be seen that the assembly U in the form of a planar grid is located in two layers.

The vertical reinforcing bars (vR1) can be inserted into the ground so that the reinforced primary reinforcing bars (R1) contribute to maintaining the fixed state without moving.

The mold F is prevented from collapsing due to a concrete installation pressure or the like when a pair of strands or a gravel occurring at the time of the first stage erection is caught.

When the step of installing the wristband beam B is further performed before the step a), connecting the reinforcing bars of the wristband beam B and the primary reinforcing bars R 1 to each other is performed by a side surface .

and c) placing concrete c in a space in the mold F formed through the step b) to complete the primary sheeting 1a, wherein a part of the vertical reinforcing bars vR1, (C) of FIG. 1 so that the lower end of the concrete C is not buried in the concrete C;

The uppermost part of the earth retaining film is formed by pouring and curing the concrete (C) in contact with the primary air surface in the form F.

The lower end of the vertical reinforcement vR1 among the primary reinforcement rods R1 should be left unfilled in the concrete C when the concrete C is inserted so as to be joined to the secondary reinforcement rods R2, If the lower end of the vertical reinforcing steel vR1 is inserted into the ground, the lower end of the first vertical reinforcing steel vR1 is not buried in the concrete C naturally without any additional operation.

After curing of the concrete (C), it is of course necessary to dismantle the form (F).

d) a step of advancing the secondary wave (Fig. 1 (d));

A second wave is formed at a height just below the primary earth retaining la made in the step c).

The lower end of the vertical reinforcing steel vR1, which is inserted into the ground by the progress of the second tearing, is not exposed in the concrete C, but is exposed to the outside.

Since the ground surface of the primary wave is already stabilized, it does not collapse in the course of the second wave breaking.

e) placing a secondary reinforcing bar (R2) on the secondary terrace surface, wherein in the step c), a portion of the vertical reinforcing bars (vR1) and the secondary reinforcing bars (R2) (vR2) and installing the form F (Fig. 1 (e));

(R2) to form the upper part of the retaining car, but it is separated by joining the first vertical reinforcement (vR1) and the second secondary vertical reinforcement (vR2) in which the lower end is not embedded in the concrete (C) So that the primary sheeting 1a and the vehicle upper portion can be integrated.

So that only a part of the upper portion of the primary retaining wall 1a and the upper portion of the car may overlap with each other so that the concrete C can be easily poured in a subsequent step. That is, as shown in FIG. 1 (e), the reinforcing bars located inside (the direction opposite to the primary terrace surface) of the primary vertical reinforcing bars vR1 and the outside of the secondary vertical reinforcing bars vR2 (F), the upper part of the space inside the form F is opened, so that it can be used as a concrete pouring place.

Also in this step, the lower end of the secondary vertical reinforcement vR2 may be inserted into the ground like the step b), and the form F may be supported by the gravel or the like.

f) Completing the secondary earth retaining wall 1b by pouring and curing the concrete C in the space in the form F formed through the step e), wherein a part of the vertical reinforcing bar vR2 Placing the concrete C so that the lower end portion is not buried in the concrete C (Fig. 1 (f));

The concrete (C) is placed and cured in contact with the surface of the secondary terrace in the form (F), thereby forming the secondary sheathing (1b), which is the secondary part of the sheeting.

As described above, since the part of the primary vertical reinforcement vR1 and the part of the secondary vertical reinforcement vR2 are connected to each other, the primary sheath 1a and the secondary sheath 1b can be integrated, A part of the car vertical reinforcement vR2 can be integrated with the upper portion of the retaining wall formed by the subsequent step since the lower end portion is not buried in the concrete C.

g) repeating steps d) through f);

Repeat the digging, reinforcement, formwork, concrete pouring, and curing until the planned depth of debris is complete.

When repeating the above steps d) to f), 'primary' and 'secondary' should be understood to mean relative positions in the depth direction.

Since the retaining method according to the present invention progresses gradually from the upper part, it does not require large equipment such as auger to perforate the ground at a time up to the depth of the planned retaining wall, As shown in FIG.

The retaining structure 1 made by such a construction method can stably support the excavation surface since the vertical reinforcing bars are continuously joined and integrated.

After the step g), a step of constructing a permanent structure such as a building in a space in the soil retaining structure 1 proceeds. When the permanent structure is adjacent to the site boundary, the outer wall of the permanent structure and the retaining structure 1 are joined together, and when the permanent structure is separated from the site boundary, the retaining structure 1 is faced to the retaining structure 1, (R) can be constructed. When the retaining wall R is constructed, it is possible to easily construct the retaining structure 1 while using less reinforcing bars or the like as compared with a general retaining wall because the retaining structure 1 can support the earth pressure.

In the step f), the concrete may be laid so that the upper end of some of the vertical reinforcing bars vR2 of the secondary reinforcing bars R2 is not embedded in the concrete C.

The upper end of the vertical reinforcing steel (vR2) exposed to the outside of the concrete (C) can be connected to the outer wall reinforcing bars of the present structure when the construction of the retaining structure is completed and can contribute to forming a more rigid structural body.

In the steps b) and e), the process of installing the drain pipe P on the ground surface may be performed together.

The drain pipe (P) is installed to be inclined downward from the inside of the ter- minal space (opposite to the ter- vaser surface) so that groundwater or the like can be discharged to the inside of the ter- minator space, Thereby preventing this dirtiness.

The drain pipe (P) can also be installed at the height of the welt beam (B).

In the method of applying the earth retaining structure according to the present invention, after the first earth retaining operation is performed on the entire circumference of the site, the second earth retaining operation may be performed on the whole circumference of the site, but as shown in FIG. 4, Step (d) to (f) (secondary earth works) may be performed on the perimeter of the site after the step (primary earth moving operation) is divided into sections on the periphery of the site.

Here, 'to divide by section' on the circumference of the site should not be understood to distinguish the circumference of the site with a specific standard, but to be understood as meaning to divide the site part by part convenient for the work.

Thus, it is preferable to apply the first and second retaining works to the sections where the earthwork is divided at the periphery of the site and the construction site is wide so that it is difficult to construct the earth retaining walls at the same depth at one time. The length of the work area that runs at one time on the same depth is about 3 ~ 5m depending on the soil.

The temporary soil (e) is stacked in front of the section where the work is first performed on the same depth, so that the work portion of the soil retaining structure is not unstable during the work such as the trenching of the next section.

In addition, the construction joint (j) generated by progressing the construction for each work section on the same depth is prevented from continuing up and down, thereby achieving structural stability of the earth retaining structure 1.

Even when the work is progressed for each work section on the same depth, the wristband beam B need not be formed to have a large height, so it can be constructed all over the site.

In the case where the 1st and 2nd earthwork operations are divided into sections on the periphery of the site, the step of approximating the I-shaped section file I to the section boundary around the site may be further performed before the step a). Fig. 5 is an explanatory diagram related to this.

In order to stabilize the ter- pic plane, it is necessary to further proceed to both sides of the section, even if the length of the section that runs at one time is 3 ~ 5m. If the I-section steel file (I) The I-beam file can support the gypsum of the section adjacent to the work section, so there is no need to make additional taps to stabilize the surface.

In addition to supporting the soil, the I-beam I can improve the vertical stiffness of the earth retaining structure constructed by the construction method of the present invention, so that the retaining structure can have a more stable structure. Can play a role.

The penetration of the I-beam steel pile I is made to the entire depth of the retaining wall to improve the integrity of the primary retaining wall 1a and the secondary retaining wall 2b.

The sections around the site identified by the I-beam file (I) can be obtained by welding the horizontal bars to the web of the I-beam file (I) or by punching holes in the web of the I-beam file to join the horizontal bars of adjacent sections And can be integrated with each other.

If the soil to which the earthmoving method is applied is made of sand or clay or the groundwater level is high, a supplementary method may be applied if necessary.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. And thus fall within the scope of the present invention.

1: retaining structure 1a: primary retaining structure
1b: Second retaining wall
B: Welt beam C: Concrete
F: Form I: I-beam file
P: Drain pipe R1: Primary reinforcement
R2: secondary rebar vR1: primary vertical rebar
vR2: Second vertical reinforcement

Claims (7)

In a method of constructing a retaining wall along a perimeter of a site,
a) advancing the primary tide;
b) disposing a primary reinforcing bar (R1) on the primary surface and installing a mold (F);
and c) placing concrete c in a space in the mold F formed through the step b) to complete the primary sheeting 1a, wherein a part of the vertical reinforcing bars vR1, (C) so as not to be buried in the concrete (C);
d) advancing the secondary turf;
e) placing a secondary reinforcing bar (R2) on the secondary terrace surface, wherein in the step c), a portion of the vertical reinforcing bars (vR1) and the secondary reinforcing bars (R2) (vR2) and installing a mold (F);
f) Completing the secondary earth retaining wall 1b by pouring and curing the concrete C in the space in the form F formed through the step e), wherein a part of the vertical reinforcing bar vR2 Placing the concrete (C) so that the lower end portion is not buried in the concrete (C); And
g) repeating steps d) through f). < Desc / Clms Page number 13 >
The method according to claim 1,
Wherein the step of installing a wale beam (B) of a reinforced concrete trough for stabilizing the surface of the earth is performed before the step (a).
The method according to claim 1,
Wherein the concrete C is installed so that the upper end of the vertical reinforcement vR2 of the secondary reinforcing bars R2 is not embedded in the concrete C in the step f).
The method according to claim 1,
Wherein the step (b) and the step (e) further comprise the step of installing a drain pipe (P) on the ground surface of the terraces.
The method according to claim 1,
Wherein the steps a) to c) are divided into sections on the periphery of the site, and then the steps d) to f) are divided into sections on the periphery of the site.
6. The method of claim 5,
The method of claim 1, wherein the step (a) further comprises the step of moving the I-beam (I) along the boundary of the site.
A soil-retaining structure constructed through the method of any one of claims 1 to 6.

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