KR20210121711A - Blocks for soil retaining wall and it's method of construction - Google Patents

Abstract

The present invention relates to blocks for constructing a retaining wall, which quickly and firmly constructs a retaining wall during excavation construction for a building, and a method for constructing a retaining wall by using the same. The blocks comprising: a basic block (10) having a front surface (11) exposed to the front, a rear surface (12) contacting backfill soil, upper and lower surfaces (13, 14) having a planar shape and having through-holes (H) formed vertically therein, and left and right side surfaces (15, 16) laterally symmetrical, and having engaging parts (C) protruding in contact with the rear surface (12); and an auxiliary block (20) having the same height as the basic block (10), having engaging parts (C') formed on the front of left and right side surfaces (25, 26) to be held on the engaging parts (C) formed on the left and right side surfaces (15, 16) of the basic block (10), and having anchor parts (A) formed on the rear of the left and right side surfaces (25, 26) to serve as an anchor by being embedded in the backfill soil.

Description

A block for retaining wall construction and a retaining wall construction method using the block {Blocks for soil retaining wall and it's method of construction}

The present invention relates to a retaining wall construction block for quickly and firmly constructing a retaining wall in a gravitational manner during building excavation construction, and a retaining wall construction method using the block.

In general, the retaining wall is excavated at the site where the building will be built, and a wall is built on the inner side of the excavated area to prevent the soil from collapsing due to earth pressure. buried in the soil as it is.

These retaining methods are diverse by structure into H pile walls, sheet pile walls, soil cement walls, on-site concrete cast walls, on-site concrete continuous walls, etc. It is classified into SPS (Strut as Permanent System) and the like.

On the other hand, in the above-mentioned known retaining method, a considerable amount of time was taken for civil works, and construction costs increased due to the large amount of equipment and manpower being input for the aforementioned retaining construction in the overall construction work, and large equipment was input during the construction process. As a result, there were problems such as causing considerable noise pollution and traffic disturbances.

Korea Registered Utility Model No. 20-0392543 (Registered on Aug. 3, 2005) Korean Patent Registration No. 10-2071225 (Registered on Jan. 22, 2020) Korean Patent Publication No. 10-2010-0068597 (published on June 24, 2010) Korean Patent No. 10-1058520 (Registered on August 16, 2011) Korea Patent No. 10-1843023 (Registered on March 22, 2018)

The present invention has been devised to solve the above problems, and an object of the present invention is to shorten the construction time of retaining wall at the excavation site for construction work, and minimize the input of manpower and equipment required for retaining wall construction. It is to provide a new type of retaining wall construction method that can reduce construction costs as well as minimize the occurrence of pollution such as noise, and blocks for retaining wall construction required for this construction method.

In order to achieve the above object, the present invention is produced in a factory and transported to the site so that it can be built by gravity, the front exposed to the front, the back surface in contact with the backfill soil, and the flat surface, and the upper and lower through holes are formed · A basic block having a lower surface and left and right symmetrical shapes and having left and right sides in contact with the rear surface and protruding locking jaws; An anchor that is made at the same height as the basic block and is buried in the backfill soil that is formed in front of the left and right sides so that the stopping jaws formed on the left and right sides of the basic block are caught, and is backfilled at the rear of the left and right sides. It provides a block for retaining wall construction consisting of an auxiliary block formed with an additional.

Preferably, the basic block and the auxiliary block are formed of high-strength concrete and formed to a maximum size that can be transported by a large truck.

The present invention is also a method of constructing a retaining wall using the above-described block, the digging step; piling step for strengthening the ground; foundation concrete pouring step; vertical reinforcement phase; constructing a basic block and an auxiliary block on the periphery of the basic concrete, and constructing the basic block and the auxiliary block by inserting vertical reinforcing bars into the vertical through-holes; Filling and compacting the backfill soil; It provides a retaining wall construction method using a retaining wall construction block comprising a.

According to an embodiment of the present invention, it is possible to quickly build a retaining wall by gravity by producing a large block of gravity construction type in a factory and then transporting it to the excavation site, thereby greatly shortening the construction period and minimizing the manpower and equipment input. Thus, construction costs can be reduced, and the possibility of civil complaints can be eliminated by minimizing noise and traffic disturbances on site. It can minimize the impact on the ground of surrounding buildings, so there are useful effects such as preventing collapse accidents.

1 is a perspective view of a retaining wall construction block according to the present invention;
Figure 2 is a plan view of the retaining wall construction block shown in Figure 1,
3 is a plan view showing a state in which the retaining wall is built in a rectangular shape;
4 is a construction flow chart of the retaining wall of the present invention;
5 is a cross-sectional view showing a digging step;
Figure 6 is a cross-sectional view showing the step of driving a pile for ground reinforcement,
7 is a cross-sectional view showing the steps of pouring foundation concrete and vertical reinforcement,
8 is a construction state diagram of the retaining wall;
9 is a cross-sectional view showing the construction completion state of the retaining wall.

Hereinafter, preferred embodiments that do not limit the present invention will be described in detail with reference to the accompanying drawings.

1 and 3, there is shown a retaining wall construction block according to an embodiment of the present invention, which is made of a front surface 11 exposed to the front, a rear surface 12 in contact with the backfill soil g, and a planar surface. The upper and lower surfaces 13 and 14 are formed with through-holes H, and the left and right sides 15 and 16 are formed in a symmetrical form and are in contact with the rear surface 12 and have a locking jaw (C) protrude. A basic block 10 having a; It is made at the same height as the basic block 10 and is formed in the left and right side surfaces 25 and 26 in front of the locking jaws C formed on the left and right side surfaces 15 and 16 of the basic block 10 to be caught. ') is formed and the left and right side surfaces 25 and 26 are buried in the backfill soil to be backfilled and the auxiliary block 20 is formed with an anchor part (A) serving as an anchor; it is composed of

In the drawings, reference numerals 21 and 22 denote the front and rear surfaces, and 23 and 24 denote the upper and lower surfaces, and the auxiliary block 20 also has through-holes (H') formed in the upper and lower sides so that the weight of the block can be reduced.

In this embodiment, the basic block 10 and the auxiliary block 20 are the largest size that can be transported by a large truck, for example, the left and right length of the basic block 10 is 5 to 11 m, the front and rear width is 2-3 m, The upper and lower heights can be produced in a standard of 1.5 to 2 m, and the material is molded with high-strength concrete with a compressive strength exceeding 40 MPa compared to general concrete.

In addition, in this embodiment, the through-holes (H, H') are formed to reduce the weight of the blocks (10, 20) and to prevent sliding between the upper and lower blocks, the through-holes (H, H') The size of the block (10, 20), which is built up and down by inserting vertical reinforcing bars (V) up and down, is manufactured to have an inner diameter of 30 to 50 cm so that it can maintain a stable construction state despite the earth pressure For this purpose, it is desirable to ensure that the solid interlocking state can be maintained by sufficiently filling and hardening the concrete inside the through-holes (H, H') into which the vertical reinforcing bars (V) are inserted.

In particular, according to the present embodiment, the through-holes (H, H') are formed very adjacent to each other vertically and horizontally, and since the material is made of high-strength concrete, the actual thickness of the concrete is about 5 to 10 cm. However, since it is light in weight, the burden of material usage and logistics costs can be reduced, and even in the case of on-site lifting construction, it is possible to construct with only a small and medium-sized crane with a lifting capacity of several tens of tons without using a very large crane. It can prevent traffic jams caused by input.

As shown in Figure 3, the block according to this embodiment is a basic block 10 formed in a generally straight shape, and an auxiliary block 20 formed in an I-shape are interlocked left and right to each other and can be built continuously in a straight line. , At this time, the auxiliary block 20 serves as an anchor grid used as a reinforcing material in the reinforcing soil retaining wall by the rear anchor portion (A) being buried in the backfill soil (g).

In addition, at the position where it is bent at a right angle, the uneven interlocking jaws C formed on the left and right side surfaces 15 and 16 of the basic block 10 made of a straight line engage with each other, thereby maintaining a stable interlocking state.

On the other hand, in the case of a retaining wall that is not at right angles, using the above-described auxiliary block 20, the locking jaws C formed on the left and right sides of the basic block 10 in the concave recesses formed on the left and right sides of the auxiliary block 20 ) to form a bent obtuse angle state, and then connect them so that they are interlocked.

Hereinafter, a process of constructing a retaining wall using the above-described basic block 10 and auxiliary block 20 will be described.

4 is a flowchart showing the steps of constructing a retaining wall with the blocks of the present invention, and FIGS. 5 to 9 schematically show these steps, which are made wider than the site where the building will be built using an excavator or the like. destroying (S10; see FIG. 5);

The step of driving the pile (P) to strengthen the excavated ground (G) (S20; see Fig. 6) and;

and pouring the foundation concrete (F) on the reinforced ground (G) (S30; see FIG. 7);

Building a vertical reinforcing bar (V) on the foundation concrete (F) (S40; see Fig. 7) and;

The basic block 10 and the auxiliary block 20 are built on the outside of the base concrete F so that the vertical reinforcing bar V is inserted into the through-holes penetrating up and down in the basic block 10 and the auxiliary block 20. and constructing it (S50; see FIG. 8);

The step of filling and compacting the backfill soil (g) (S60; see FIG. 8); and repeating the above-described steps (S50, S60) to build the blocks 10 and 20 up to the ground (S70; see FIG. 9).

Since the specific method of each of the above-described steps (S10 to S40) is apparent to those skilled in the art to which the present invention pertains, a detailed description or illustration thereof will be omitted.

In the step (S50), it is preferable to make solid interlocking between the upper and lower blocks by filling and curing the cocrete inside the through-hole into which the vertical reinforcing bar is inserted, as described above, and the vertical reinforcing bar is installed along the building height of the block. Just connect them vertically.

In the drawing, reference numeral B denotes a building that entered the excavated site after completing the above-described steps, and symbol S denotes the excavated cut slope.

As described above, the block for retaining wall construction according to this embodiment and the retaining wall construction method using this block use a crane while disembarking by transporting the block produced in advance in the factory to a large truck after constructing a trench, pile and concrete foundation at the site. By constructing the retaining wall by gravity, it is possible to construct a retaining wall with a strong structure in a very short period of time, and it is possible to minimize the input of equipment and manpower required for the construction of the retaining wall. Of course, since there are a number of through-holes at the top and bottom, it is possible to make it large and lightweight, and since the upper and lower blocks are firmly connected by vertical reinforcing bars, it is possible to prevent sliding due to earth pressure, and it is possible to prevent sliding due to earth pressure. A new retaining wall construction method suitable for the site can be suggested.

10: basic block
11: front
12: rear
13: top
14 : if
15: left side
16: right side
20: auxiliary block
21: front
22: rear
23: top
24 : if
25: left side
26: right side
A: anchor part
B: building
C, C' : jamming jaw
F : foundation concrete
G: ground
g : backfill soil
H, H' : Through hole
P: file
S: slope
V : vertical rebar

Claims (4)

The front surface 11 exposed forward, the rear surface 12 in contact with the backfill soil, and the upper and lower surfaces 13 and 14 with through-holes (H) formed on the top and bottom, and the rear surface in a symmetrical form A basic block 10 having left and right side surfaces 15 and 16 in which the locking jaws C protrude in contact with (12);
It is made at the same height as the basic block 10 and is formed in the left and right sides 25 and 26 in front of the locking jaws C formed on the left and right side surfaces 15 and 16 of the basic block 10 to be caught. ') is formed and the left and right side surfaces 25 and 26 are buried in the backfill soil to be backfilled, and the auxiliary block 20 is formed with an anchor part (A) serving as an anchor; dragon block.
The method according to claim 1,
The basic block 10 and the auxiliary block 20 is a retaining wall construction block, characterized in that formed of high-strength concrete.
The method according to claim 1,
The basic block 10 and the auxiliary block 20 is a retaining wall construction block, characterized in that it is molded to a maximum size that can be transported by a large truck.
A method of constructing a retaining wall using the block according to any one of claims 1 to 3,
The step of digging wider than the place where the building will be built (S10) and;
The step of driving the pile (P) to strengthen the excavated ground (G) (S20 and;
Pouring the foundation concrete (F) on the reinforced ground (G) (S30 and;
Building a vertical reinforcing bar (V) on the foundation concrete (F) (S40) and;
The basic block 10 and the auxiliary block 20 are built on the outer side of the base concrete F, but the vertical reinforcing bar V is inserted into the through-holes penetrating up and down in the basic block 10 and the auxiliary block 20. and constructing it (S50);
Filling and compacting the backfill soil (g) (S60) and;
repeating the steps (S50, S60) to build the blocks (10, 20) up to the ground (S70); A retaining wall construction method using a retaining wall construction block, characterized in that it comprises a.

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