KR102420947B1 - Retaining wall construction method using gravity block - Google Patents

Abstract

The present invention relates to a retaining wall construction method using a gravity block. More specifically, the present invention relates to a retaining wall construction method, which can stably build a retaining wall by withstanding soil pressure by filling stones and soil into front and back fill parts of the gravity block and improve construction speed by using larger gravity blocks than the existing blocks. The retaining wall construction method comprises: a foundation concrete forming step of forming foundation concrete by pouring concrete with a thickness of 20 cm and forming a front part to be 1 to 3 cm higher than a back part; a gravity block installation step of installing a gravity block on the upper surface of the base concrete, wherein the gravity block which is an L-shaped block includes a front part having a front filling part formed on the rear surface of a front reinforcement plate to penetrate the inside, a rear part having a rear filling part formed integrally on the rear surface of the front part to be lower than the front part and to penetrate the inside, a plurality of drainage holes formed in the bottom surface of the front part, and a wire coupling groove and a drain pipe insertion groove formed in the upper surface of the rear part; a wire and drain pipe installation step of installing the gravity block on the upper surface of the base concrete, coupling a wire to the wire coupling groove formed in the upper surface of the rear part, and installing a drain pipe in the drain pipe insertion groove; and a filling part filling and compacting step of installing the plurality of gravity blocks on the upper surface of the base concrete, filling stones in an inner space of the front filling part, filling soil in an inner space of the rear filling part, performing compacting work using a compactor, filling backfill soil in a rear empty space of the gravity blocks to the height of the front part to cover the upper surface of the rear part, and performing compacting work using the compactor.

Description

Retaining wall construction method using gravity block

The present invention relates to a method of constructing a retaining wall using a gravity block, and more particularly, it can withstand earth pressure by its own weight by filling the front filling part and the rear filling part with rubble and soil. It is possible to maintain the bearing capacity more stably, to improve the construction speed by using a larger block than the existing block-type retaining wall, and to build a retaining wall stably by using the self-weight of the backfilling soil.

In general, an integrated construction method in which concrete is poured on-site as a retaining wall to prevent soil loss or collapse on slopes of roads, incisions, and riversides is the dominant method.

However, in recent years, for reasons such as cumbersome work process and economic feasibility, a reinforcement made of steel or synthetic fiber with high tensile force is connected to a front plate made of a concrete block or panel, and the extended part of the reinforcement is buried in the soil compaction layer to self-weight. However, the so-called reinforced soil retaining wall, which creates a reinforced soil with increased adhesion by restraining the movement of soil particles due to external forces to the lateral displacement by the frictional force between the reinforcement and soil particles, is becoming more and more common.

The conventional prefabricated reinforced earth retaining wall construction block includes a front surface forming the surface of the retaining wall and a rear surface in contact with the reinforcing soil body, and left and right side surfaces where at least part of the adjacent blocks are in contact with each other, and reinforcing materials or reinforcing materials, as shown in the accompanying drawings It includes an upper surface on which a reinforcement insertion groove into which an anchor for connection is inserted is formed in the front-rear direction, and a lower surface corresponding to the upper surface, and on the left and right sides of the upper and lower surfaces, connecting pins for fastening the connecting pins between the upper and lower blocks. In the block for the construction of a retaining wall in which the insertion hole is formed vertically through;

On the inside of the block, a through hole 60 is formed through from the upper surface 40 to the lower surface 50, and the through hole 60 is a connection inserted into the connection pin insertion hole (h) of the upper block when the blocks are stacked. It is formed at a position where the pin is hooked, and a reinforcement insertion groove 44 through which the front end of the reinforcement material is directly caught is opened to the rear side of the through hole 60, and the partition wall 62 between the both through holes 60. Reinforcing material insertion grooves 44 through which the middle portion of the reinforcing material is inserted are formed in the front in the left and right directions so that one reinforcing material is connected to the rear through the reinforcing material insertion grooves 44 on both sides.

Since the block as described above is installed in the embankment and fixed using a reinforcing material, there is a disadvantage in that there is no choice but to install soil or crushed stone behind the block.

The block has a problem in that it cannot be used in the cut part as well as the rock is laid in the fill part and cannot be used. In addition, in order to connect a plurality of blocks with reinforcement, a large number of people must be mobilized to work, so there is a problem in that a lot of work time and money are spent.

Korean Patent Laid-Open Patent No. 10-2017-0040061 "Fixing Structure of Reinforced Earth Retaining Wall Using Front Block"

The present invention has been developed to solve the above problems, and its purpose is to fill rubble and soil inside the front and rear filling parts of the gravity block and form a retaining wall by its own weight. It is to provide a retaining wall construction method using a gravity-type block that can suppress the activity of the block and can be formed twice as large as the conventional block to improve construction efficiency and shorten construction.

In order to achieve the above object, the present invention provides a base concrete forming step of pouring concrete to a thickness of 20 cm and forming the base concrete so that the front part is formed 1-3 cm higher than the rear part;

It is an L-shaped block and consists of a front part having a front filling part penetrating the inside on the back side of the front reinforcement plate, and a rear part having a rear filling part penetrating inside and lower than the front part while integrally formed on the rear surface of the front part. , Gravity-type block installation step of forming a plurality of drain holes on the bottom surface of the front part, and installing a gravity-type block having a wire fastening groove and a drain pipe insertion groove formed on the upper surface of the rear part on the upper surface of the base concrete;

A wire and drain pipe installation step of installing a gravity block on the upper surface of the base concrete, fastening the wire to the wire fastening groove formed on the upper surface of the rear part, and installing a drain pipe in the drain pipe insertion groove;

After installing a plurality of the gravity-type blocks on the upper surface of the foundation concrete, the interior space of the front filling part is filled with rubble, and after filling the internal space of the rear filling part with soil, compaction is performed using a compactor, and the rear empty space of the gravity-type block is filled back. It consists of a filling and compaction step in which the soil is covered with the upper surface of the rear part and filled to the height of the front part, and then compacted using a compactor to match the height of the front part.

The present invention as described above has various effects as follows.

First, since debris and soil are filled inside the front and rear filling parts of the gravity block and the retaining wall is formed by the weight of the soil, it has the effect of suppressing the outflow of soil and the activity of the slope on the back side of the retaining wall.

Second, it has the effect of improving construction efficiency and shortening construction by forming about twice as large as the conventional block.

Third, by installing drainage holes for groundwater treatment on the back side of the gravity-type block, it is possible to reduce the increase in back earth pressure due to groundwater compared to the existing block-type retaining wall.

1 is a perspective view showing the configuration of a conventional block;
2 is a perspective view showing the configuration of the present invention;
3 is a bottom perspective view showing the configuration of the present invention;
4 is a cross-sectional view showing the configuration of the present invention;
5 to 6 are side views showing another configuration of the present invention;
7 to 9 are views showing the state of use of the present invention;

Hereinafter, specific details for preferred implementation of the present invention will be described in detail with reference to the accompanying drawings.

The present invention can withstand the earth pressure by its own weight by filling the front filling part and the rear filling part of the gravity type block with rubble and soil, and by installing a wire and a drain pipe on the bottom surface to maintain a more stable bearing capacity of the gravity type block, and larger than the existing block A method of constructing a retaining wall using a gravitational block that can be used to improve the construction speed by using a scale-type gravity block and to build a retaining wall stably using the self-weight of the backfilling soil is provided.

The present invention includes a foundation concrete formation step, a gravitational block installation step, a wire and drain pipe installation step, backfilling and compaction step.

In the present invention as described above, after performing the survey to install the retaining wall, the excavation is carried out to the base concrete floor, and then the compaction operation is performed to secure the bearing capacity of the ground.

If it is difficult to secure the bearing capacity of the ground, the foundation concrete is formed after securing the bearing capacity of the ground by applying the ground improvement method.

The foundation concrete formation step is,

After compacting the ground at the tip of the cut part, concrete is poured to a thickness of 20 cm, and at the same time, the base concrete 160 is formed so that the front part is formed 1-3 cm higher than the rear part.

Since the foundation concrete 160 has a 1 to 3% slope on the front part of the retaining wall formed after laminating the gravity block 100, it is possible to secure structural stability and visual stability.

The gravitational block installation step,

The gravitational block 100 is installed to be connected to each other in the longitudinal direction on the upper surface of the foundation concrete 160, and the shape is an L-shaped block passing through the inside as shown in FIGS. 2 to 4 of the accompanying drawings. The front part 110 in which the filling part 111 is formed, and the rear part 120 in which the rear filling part 121 penetrating the inside is formed integrally with the rear surface of the front part 110 and is lower than the front part 110 in height. ) is made of

A reinforcing plate 130 having a larger area than the front part 110 is integrally formed on the front surface of the front part 110 .

And a drain groove 113 is formed on the bottom surface of the front part 110 in the horizontal and vertical directions, and a wire fastening groove 122 is formed in the center of the upper surface of the rear part 120 in the vertical direction, and is symmetrical with each other in the vertical direction. A drain pipe insertion groove 123 is formed.

The gravity block 100 is a structure that utilizes the backfilling material filled in the front and rear filling parts 111 and 121 as the weight of the retaining wall.

In addition, the present invention forms a coupling groove 115 on the upper surface of the front part 111 of the gravity block 100 and a coupling protrusion 116 on the bottom surface as shown in FIGS. 5 and 6 of the accompanying drawings, and a gravity block ( When constructing 110), the bottom surface coupling protrusion 116 of the two-stage gravity block 100 is coupled to the upper surface coupling groove 115 of the single-stage gravity block 100 and fastened.

As described above, since the first-stage gravity block 100 and the two-stage gravity block 100 are combined with the coupling protrusion 116 and the coupling groove 115, the retaining wall can be constructed more firmly and safely.

The wire and drain pipe installation step,

A crane is taken and lifted to the drain groove 113 formed on the bottom surface of the front part of the gravity block 100 and installed on the upper surface of the foundation concrete 140 .

Then, as shown in FIG. 7 of the accompanying drawings, the wire 140 is wound and fastened in the wire fastening groove 122 formed on the upper surface of the rear part 120, and the end is fixed to the end of the cut part to fix the gravity block 100. will support Then, the drain pipe 150 is inserted and installed in the drain pipe insertion groove 123 .

The drain pipe 150 serves to discharge the water accumulated inside the rear filling part 121 to the outside.

The backfilling and compacting step is,

After connecting and installing a plurality of the gravitational block 100 on the upper surface of the foundation concrete 160, as shown in FIG. The soil and soil are filled, and the soil 170 is filled in the inner space of the rear filling part 121 .

Then, the backfilling soil is filled on the upper surface of the rear part 120 and stacked up to the height of the front part 110 , and then the compaction operation is performed using a compactor after matching the height with the front part 110 .

And after filling the backfilling soil in the empty space behind the gravity block 100, compaction is performed using a compactor to finish.

At this time, the wire 140 installed on the upper surface of the rear part of the gravity-type block 100 firmly supports the gravity-type block 100 to prevent the phenomenon of being drawn to the front, and the drain pipe 150 is the rear filling part 121 of Discharge the water accumulated in the internal space to the outside.

The present invention as described above fills the gravitational block 100 and the front and rear filling parts 111 and 121 of the block 100 with rubble 160 and soil 170 and forms a retaining wall by its own weight, It suppresses the outflow of soil from the back of the retaining wall and the activity of the slope.

After installing the single-stage gravity block 100 as described above, as shown in the attached drawing FIG. 9 , the two-stage gravity block 100 is placed on the upper surface of the first-stage gravity block 100, and the wire and drain pipe installation steps and backfilling And while performing the compaction step, the gravity block 100 is stacked up to the required height to complete the retaining wall.

100: gravity block 110: front part
111: front filling part 120: rear part
121: rear filling part 130: reinforcing plate
140: wire 150: drain pipe
160: rubble 170: soil

Claims (2)

A foundation concrete forming step of pouring concrete to a thickness of 20 cm and forming the foundation concrete so that the front part is formed 1-3 cm higher than the rear part;
It is an L-shaped block and consists of a front part having a front filling part penetrating the inside on the back side of the front reinforcement plate, and a rear part having a rear filling part penetrating inside and lower than the front part while integrally formed on the rear surface of the front part. , Gravity-type block installation step of forming a plurality of drain holes on the bottom surface of the front part, and installing a gravity-type block having a wire fastening groove and a drain pipe insertion groove formed on the upper surface of the rear part on the upper surface of the base concrete;
A wire and drain pipe installation step of installing a gravity block on the upper surface of the base concrete, fastening the wire to the wire fastening groove formed on the upper surface of the rear part, and installing a drain pipe in the drain pipe insertion groove;
After installing a plurality of the gravity-type blocks on the upper surface of the foundation concrete, the interior space of the front filling part is filled with rubble, and after filling the internal space of the rear filling part with soil, compaction is performed using a compactor, and the rear empty space of the gravity-type block is filled back. A method of constructing a retaining wall using a gravity-type block consisting of the filling and compaction steps of filling the upper surface of the rear part with soil and filling it to the height of the front part, and then compacting it using a compactor.
According to claim 1,
Retaining wall construction method using a gravity block, characterized in that a coupling groove and a coupling protrusion are formed on the upper surface of the front part of the gravity block, and the bottom coupling protrusion of the two-stage gravity block is coupled to the upper surface coupling groove of the single-stage gravity block .

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