KR102182692B1 - Plastic soil retaining wall and prefabricated soil retaining wall assembly comprising the same - Google Patents

Abstract

The present invention relates to a plastic earth plate and a prefabricated earth plate assembly including the same, and more particularly, to a plastic-based earth plate having a customized structure of a groundwater outlet passage and a stepped fitting, and a prefabricated earth plate assembly including the same.
According to the present invention, 1) minimization of consumption of natural resources due to the use of waste plastics; 2) Improvement of durability and conversion of earth plate by using plastic material; 3) The collapse of the soil surface according to the construction of the soil buried fixing device and the groundwater outflow passage, preventing the soil leakage and reducing the deformation of the earth plate due to the reduction of water pressure; 4) The effect of improving the workability and securing integrity of the earth plate can be achieved by using a step-style customized structure and connecting steel pipe.

Description

Plastic earth plate and prefabricated earth plate assembly including the same {PLASTIC SOIL RETAINING WALL AND PREFABRICATED SOIL RETAINING WALL ASSEMBLY COMPRISING THE SAME}

The present invention relates to a plastic earth plate and a prefabricated earth plate assembly including the same, and more particularly, to a plastic-based earth plate having a customized structure of a groundwater outlet passage and a stepped fitting, and a prefabricated earth plate assembly including the same.

The earth plate is to prevent the slope from collapsing or the soil from flowing out by assembling a plate-shaped earth plate by inserting a steel beam at regular intervals during the construction of the foundation work of the building or the cutting section and the underground construction work. In the conventional earth plate construction, a type of inserting a wooden earth plate or a C-type steel earth plate into the grooves on both sides of the H-beam (thumb pile) was mainly used.

As the wooden earth plate is in contact with soil and groundwater for a long period of time, it has problems of expansion and contraction due to moisture absorption and corrosion and decay due to harmful microorganisms and pests in the surrounding environment. Accordingly, during long-term use, it may lead to loss of the earth plate and collapse of the soil surface due to a decrease in durability. In addition, since there is no outlet passage for groundwater contained in the soil surface, large deformation and destruction of the earth plate may occur due to an increase in earth pressure during rain, and this may cause severe discharge of the soil. The conventional wooden earth plate has to be subjected to surface coating treatment once or twice a year for reuse, so its conversion property is low, and unnecessary maintenance cost and manpower are consumed. Also, since wood is used as the main material, the negative impact of the environment due to the consumption of natural resources is great.

In the case of a steel earth plate, the allowable stress and bending stiffness are high in terms of material, and it is more usable than a wooden earth plate because there is no fear of decay, but the efficiency of cross-section exclusive use is lowered by bending the steel plate to form a C-shaped cross section. In particular, the problem of corrosion due to moisture contact and the outflow of soil and groundwater between the earth plates have been raised. The high weight of the member makes precise construction difficult and is a major cause of the increase in construction cost.

Korean Patent Registration No. 10-0755294 discloses an earth plate equipped with drainage and water drainage functions, but a separate complex device must be installed on the earth plate for the drainage function, and to install the device, Since the insertion hole is formed in the center of the earth plate, there is a disadvantage in that it may lower the bending stiffness of the earth plate.

Korean Patent Registration No. 10-1313747 provides a plastic earth plate having a structure that can be interlocked with each other, but the earth plate does not contain a structure for draining groundwater, so the deformation of plastic due to earth pressure over time. The downside is that problems can arise.

Accordingly, the present invention has been conceived to solve the above problems, and it is intended to provide a technology for manufacturing an earth plate with improved durability and improved groundwater outflow and reduced durability of a wooden earth plate by using plastic as a main material, and improved ease of construction and flexibility. To this end, we provide the earth plate thickness design technology to secure the flexural stiffness by using connecting steel pipes and step-type custom structures to secure the integrity between the groundwater outlet passage and the soil buried fixing device and the earth plate.

In order to solve the above problems, the present invention provides a plastic earth plate having a stepped protrusion at the upper end of the front part and a stepped depression at the lower end of the front part, and a drain hole penetrating up and down and a connecting protrusion formed at the upper part.

In addition, the present invention provides a plastic earth plate, characterized in that the earth plate is further formed with a connecting steel pipe insertion hole passing through the top and bottom.

In addition, the present invention provides a wooden earth plate having the same height and a plastic earth plate, characterized in that it satisfies the following Equation 3:

[Equation 3]

및

는 각각 동일한 높이의 목재 및 플라스틱 토류판의 두께이며,

및

은 각각 동일한 높이의 목재 및 플라스틱 토류판의 탄성계수이다.)(In the above formula,

And

Is the thickness of the wood and plastic earth plates of the same height, respectively,

And

Is the modulus of elasticity of wood and plastic earth plates of equal height, respectively.)

In the present invention, the "thickness of the earth plate" means the length from the rear part to the front part of the earth plate.

In addition, in the present invention, based on the longitudinal section cut in the direction horizontal to the ground, the earth plate is an H-beam insertion part having a certain width b1, an inclined part whose width is constantly increased in the direction of the front part of the earth plate, and a constant It is a structure including a central portion having a width (b3),

It is a symmetrical shape based on the center of the earth plate,

The length (L) of the earth plate excluding the left and right H-beam inserts, half the length of the center (x), the width of the H-beam insert (b1), and the width of the center (b3) satisfy Equation 4 below. It provides a plastic earth plate, characterized in that:

[Equation 4]

In addition, the present invention provides a plastic earth plate, characterized in that the earth plate is further formed with a connection groove that can be fitted with the connection protrusion and is further formed with a soil buried fixing device that is attached to the upper part of the earth plate.

In addition, the present invention provides a plastic earth plate, characterized in that the soil buried fixing device protrudes from 5 to 30 mm to the rear portion of the earth plate after being attached to the upper part of the earth plate.

In addition, the present invention is a stepped structure that is installed between H-beams at regular intervals, and has a stepped protrusion at the top of the front part and a stepped depression at the bottom of the front part, and a drain hole and a connecting steel pipe insertion hole penetrating the top and bottom and a connection protrusion Formed plastic earth plate; A soil buried fixing device having a connection groove that can be fitted with the connection protrusion of the earth plate, and having a drain groove and a connection steel pipe insertion groove having the same shape as the drain hole and the connection steel pipe insertion hole of the earth plate; And a connecting steel pipe inserted through the connecting steel pipe insertion hole of the earth plate and the connecting steel pipe insertion groove of the soil buried fixing device.

According to the present invention, 1) minimization of consumption of natural resources due to the use of waste plastics; 2) Improvement of durability and conversion of earth plate by using plastic material; 3) The collapse of the soil surface according to the construction of the soil buried fixing device and the groundwater outflow passage, prevention of soil leakage and reduction of the deformation of the earth plate due to water pressure reduction; 4) The effect of improving the workability and securing integrity of the earth plate can be achieved by using a step-style customized structure and connecting steel pipe.

1 is a perspective view of a plastic earth plate according to an embodiment of the present invention,
2 is a perspective view (a) and a plan view (b) of a plastic earth plate according to an embodiment of the present invention,
3 is a perspective view (a: separate type, b: integrated type) of the soil buried fixing device 170 according to an embodiment of the present invention,
4 is a plan view showing the coupling relationship between the earth plate 100 and the soil buried fixing device 170 according to an embodiment of the present invention,
5 is a perspective view of the earth plate assembly 1000 according to an embodiment of the present invention,
6 is a cross-sectional view taken along line II′ of FIG. 5;
7 is a cross-sectional view taken along line II-II' of FIG. 5;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, when it is determined that a detailed description of a related known technology may obscure the subject matter of the present invention, a detailed description thereof will be omitted. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are assigned to similar parts throughout the specification, and detailed configuration directions will be described with reference to the drawings. In addition, throughout the specification, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless otherwise stated.

In order to solve the above-described problems presented by the conventional wooden earth plate, the present inventor developed the earth plate having a groundwater outlet passage and a step-type customized structure while using plastic as a main material, and the present invention was focused on the fact that it is possible to provide a very simple and robust earth plate assembly with an assembly type. Was completed.

Accordingly, as a first aspect, the present invention discloses a plastic earth plate having a stepped protrusion at the top of the front portion and a stepped depression at the bottom of the front portion, and a drain hole penetrating up and down and a connecting protrusion at the top. Further, the present invention discloses a prefabricated earth plate assembly including the earth plate as a second aspect. Hereinafter, the plastic earth plate according to the present invention will be described in detail by way of examples.

1 is a perspective view of a plastic earth plate according to an embodiment of the present invention.

Referring to FIG. 1, the plastic earth plate 100 according to the first aspect of the present invention has a stepped protrusion 110 having a constant height at the top of the front portion and a stepped depression 120 having a predetermined depth at the bottom of the front portion. , Includes a structure in which a connection protrusion 130 and a drain hole 140 penetrating the upper and lower portions of the earth plate are formed at the top.

In the present invention, the front portion is a portion exposed to the outside when the earth plate is installed, and means a surface opposite to the rear portion in contact with the soil surface.

The stepped protrusion 110 and the stepped recess 120 have a structure protruding or recessed at the top or bottom of the front portion of the earth plate. The height ℓ1 of the stepped protrusion 110 may be equal to a sum of the depth ℓ2 of the stepped depression 120 and the height ℓ3 of the connection protrusion 130. That is, the relationship of ℓ1 = ℓ2 + ℓ3 can be established. In addition, the width ℓ4 of the upper surface of the earth plate excluding the stepped protrusion 110 may be equal to or greater than the width ℓ5 of the lower surface of the earth plate excluding the stepped depression 120. That is, a relationship of ℓ4 ≥ℓ5 can be established. Preferably, ℓ4 may be equal to ℓ5. When the earth plate 100 is stacked to form the earth plate assembly, the stepped protrusions 110 of the lower earth plate are in close contact with the stepped depressions 120 of the upper earth plate, thereby providing a solid coupling force and preventing the outflow of soil from the outside. I can.

The connection protrusion 130 has a structure formed by protruding regularly at regular intervals on the upper surface of the earth plate 100 except for the stepped protrusion 110. The shape of the connection protrusion 130 is not particularly limited, and may be a cylinder, a square pillar, a pentagonal pillar, or the like. The height ℓ3 of the connection protrusion 130 may have a constant relationship with the height ℓ1 of the stepped protrusion 110 and the depth ℓ2 of the stepped depression 120. That is, the height can be set so that the relationship of ℓ1 = ℓ2 + ℓ3 is established. Accordingly, when the earth plate 100 is stacked to form the earth plate assembly, the lower surface of the upper earth plate may be supported by the connection protrusion 130 of the lower earth plate. The connection protrusion 130 may be formed in a regular arrangement while maintaining a constant distance from the front and rear to the left and right on the upper surface of the earth plate 100. Preferably, when defining a set of 4 to 8 connecting protrusions 130 formed in a regular arrangement while maintaining a constant distance in the front and rear, the connecting protrusion 130 of the set is on the upper surface of the earth plate 100 2-5 sets can be formed at regular intervals.

The drain hole 140 is formed through the top and bottom of the earth plate 100, and serves as a passage through which groundwater can be discharged. The shape of the drain hole 140 is not particularly limited, and its size is also not particularly limited. In consideration of the characteristics of the ground and the degree of outflow of groundwater, a person of ordinary skill in the art may appropriately adjust the shape and size of the drain hole 140. The number of the drainage holes 140 is not particularly limited, but if the number is too small, the outflow of groundwater may not be sufficient, so that the function may not be properly exhibited. If the number is too large, the earth plate 100 There is a risk of soil collapse due to the decrease in flexural stiffness. A person skilled in the art may properly adjust the number of formations of the drainage holes 140 in consideration of the amount of soil, the degree of outflow of groundwater, and the characteristics of the ground. Preferably, the diameter of the drain hole is preferably 25 to 75 mm in consideration of the diameter of the earth plate connecting steel pipe, and the spacing between the centers of the drain holes is preferably made to match the spacing between the centers of the connection protrusion.

Meanwhile, the earth plate 100 may further include a connecting steel pipe insertion hole 150 penetrating the top and bottom. The connecting steel pipe insertion hole 150 becomes a passage for a connecting steel pipe that is inserted through the earth plate 100 from the uppermost end to the lowermost end after the earth plate 100 is stacked to form the earth plate assembly. The shape and size of the connecting steel pipe insertion hole 150 may be appropriately adjusted according to the shape and size of the connecting steel pipe to be inserted. Preferably, the number of the connecting steel pipe insertion holes 150 may be formed equal to the number of drain holes 140. In addition, the forming position of the connecting steel pipe insertion hole 150 may be formed adjacent to the drain hole 140, and may be formed integrally with the drain hole 140 if the connecting steel pipe can be fixed. .

As described above, in the present invention, a structure of the connection protrusion 130, the drain hole 140, and the connection steel pipe insertion hole 150 may be formed on the upper surface of the earth plate 100 except for the stepped protrusion 110. , The arrangement form thereof is not particularly limited. Preferably, a drain hole 140 and/or a connecting steel pipe insertion hole 150 may be formed in the center between the connection protrusions 130 regularly formed at regular intervals between the front and rear, left and right.

In the present invention, the earth plate 100 may satisfy the relationship of the following equations 1 to 3 with a wooden earth plate having the same height in order to have a flexural rigidity equal to or higher than that of an existing earth plate made of wood as a main material:

[Equation 1]

[Equation 2]

[Equation 3]

및

는 각각 동일한 높이의 목재 및 플라스틱 토류판의 두께, h는 토류판의 높이,

및

은 각각 동일한 높이의 목재 및 플라스틱 토류판의 탄성계수이다.)(In the above formula,

And

Is the thickness of the wooden and plastic earth plates of the same height respectively, h is the height of the earth plates,

And

Is the modulus of elasticity of wood and plastic earth plates of equal height, respectively.)

2 is a perspective view and a plan view of a plastic earth plate according to another embodiment of the present invention.

Referring to FIG. 2, the earth plate 100 according to the present invention has an H-beam insert 160 having a certain width b1, based on a longitudinal section cut in a direction horizontal to the ground, and a front direction of the earth plate. It is a structure including an inclined portion 161 having a constant width and a central portion 163 having a constant width (b3),

It is a symmetrical shape based on the center of the earth plate,

The length (L) of the earth plate excluding the left and right H-beam inserts, half the length of the center (x), the width of the H-beam insert (b1), and the width of the center (b3) satisfy Equation 4 below. It can be characterized by:

[Equation 4]

When the cross section of the earth plate has the shape as described above, it is possible to improve the bending resistance of the earth plate against earth pressure by increasing the second moment of the cross section of the cross section of the earth plate.

Figure 3 is a perspective view of the soil buried fixing device 170 according to an embodiment of the present invention, Figure 4 is a coupling relationship between the earth plate 100 and the soil buried fixing device 170 according to an embodiment of the present invention It is a plan view showing.

First, referring to FIG. 3, the soil buried fixing device 170 has a structure in which a connection groove 171, a drain groove 172, and a connection steel pipe insertion groove 173 are formed.

The connection groove 171 may have the same shape, the same size, and the same positional arrangement as the connection protrusion 130 formed on the upper surface of the earth plate 100, so that the connection protrusion 130 may be fitted. In addition, the drainage groove 172 and the connection steel pipe insertion groove 173 may also be formed in the same shape at the same position as the drainage hole 140 and the connection steel pipe insertion hole 150 vertically penetrating the earth plate 100. have.

Next, referring to FIGS. 1 and 3, the thickness (ℓ6) of the soil buried fixing device 170 is formed to be thinner than the height (ℓ3) of the connection protrusion 130 formed on the upper surface of the earth plate 100. Can be. Preferably, it may be 5mm ≤ L3-ℓ6 ≤ 30mm, and most preferably 10mm ≤ L3-ℓ6 ≤ 20mm.

The width ℓ7 of the soil buried fixing device 170 may be formed to be longer than the width ℓ4 of the upper surface excluding the stepped protrusion 110 of the earth plate 100. Preferably, it may be 50mm ≤ℓ7-ℓ4 ≤ 300mm, and most preferably, it may be 100mm ≤ℓ7-ℓ4 ≤ 200mm.

Next, referring to FIGS. 3 and 4, the length (ℓ8) of the earth and sand buried fixing device 170 is the length (L) excluding the portion inserted into the H-beam from the length (L) of the earth plate 100 ) Can be equal to or shorter. In particular, the soil buried fixing device 170 may be integrally manufactured and integrally combined with the connection protrusion 130 formed on the upper surface of the earth plate 100, or a plurality of soil buried fixing devices 170 of a certain length Separately, each may be individually coupled to the connection protrusion 130 of the upper surface of the earth plate 100.

The soil buried fixing device 170 may be manufactured using materials such as plastic, wood, and iron, and preferably, plastic or iron.

The earth and sand buried fixing device 170 coupled to the earth plate 100 serves to reduce the bending deformation of the earth plate 100 due to earth pressure and water pressure by acting as a fixing hardware for the earth plate 100 and the earth and sand surface. Through this, the thickness of the plastic earth plate 100 can be reduced. In particular, in order to reduce the bending deformation of the earth plate 100, it is preferable that the soil surface buried fixing device 170 is integrally manufactured and combined with the connection protrusion 130 formed on the upper surface of the earth plate 100.

An embodiment showing the coupling relationship between the connection protrusion 130 formed on the upper surface of the earth plate 100 and the soil buried fixing device 170 is shown in FIG. 4.

The present invention is a second aspect, which is installed between H-beams at regular intervals, and shows a stepped structure in which a calculation-type protrusion is formed at the top of the front part and a calculation-type depression part is formed at the bottom of the front part. A plastic earth plate having a connection protrusion formed thereon; A soil buried fixing device having a connection groove that can be fitted with the connection protrusion of the earth plate, and having a drain groove and a connection steel pipe insertion groove having the same shape as the drain hole and the connection steel pipe insertion hole of the earth plate; And a connecting steel pipe inserted through the connecting steel pipe insertion hole of the earth plate and the connecting steel pipe insertion groove of the soil buried fixing device. Hereinafter, the earth plate assembly according to the present invention will be described in detail by way of examples.

5 is a perspective view of the earth plate assembly 1000 according to an embodiment of the present invention.

5, the above-described earth plate 100 is laminated between H-beams 200 installed at regular intervals. The earth plate 100 positioned at the top of the earth plate assembly 1000 may be applied with the earth plate 100 of the above-described form, and the upper stepped protrusion 110 and the connection protrusion 130 of the earth plate 100 are omitted. A type of earth plate may be used.

After stacking all the earth plates 100 between the H-beams 100, the connecting steel pipe 300 is inserted through the connecting steel pipe insertion hole 150 formed on the upper surface of the earth plate 100 to complete the earth plate assembly. I can.

The connecting steel pipe 300 not only complements the bending stiffness by securing the integrity between the stacked and installed earth plates 100, but also serves to prevent the stress concentration phenomenon of the earth plate 100 due to a partial increase in earth pressure on the soil surface. I can.

6 is a cross-sectional view taken along line I-I' of FIG. 5, and FIG. 7 is a cross-sectional view taken along line II-II' of FIG. 5.

First, referring to FIG. 6, the stepped protrusion 110 formed at the top of the front part of the lower earth plate is in close contact with the stepped depression 120 formed at the lower part of the front part of the upper earth plate, so that the upper and lower earth plates can be firmly supported with each other. have. In addition, by the connection protrusion 130 formed on the upper surface of the lower earth plate, a certain gap is formed between the upper earth plate and the lower earth plate, so that groundwater can be smoothly discharged through the drain hole 140.

Next, referring to FIGS. 6 and 7, the connection steel pipe insertion hole 150 formed through the earth plate and the connection steel pipe 300 inserted through the connection steel pipe 300 increase the integrity of the upper plate and the lower plate of the stacked earth plate, and thus the earth plate assembly It is possible to improve the bending stiffness and the like. In addition, groundwater may be smoothly discharged through the drain hole 100 formed through the earth plate 100.

In the above, preferred embodiments of the present invention have been described in detail with reference to the drawings. The description of the present invention is for illustrative purposes only, and a person of ordinary skill in the art to which the present invention pertains will be able to understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning, scope, and equivalent concepts of the claims should be interpreted as being included in the scope of the present invention. do.

1000: earth plate assembly
100: earth plate 110: stepped protrusion
120: stepped depression 130: connection protrusion
140: drain hole 150: connecting steel pipe insertion hole
160: H-beam insertion portion 161: inclined portion
162: central 170: soil buried fixing device
171: connection groove 172: drain groove
173: connecting steel pipe insertion groove 200: H-beam
300: connecting steel pipe
ℓ1: Height of stepped protrusion ℓ2: Depth of stepped depression
ℓ3: Height of connection protrusion ℓ4: Width of upper surface of earth plate excluding stepped protrusion
ℓ5: Width of the lower surface of the earth plate excluding stepped depressions
ℓ6: thickness of soil buried fixing device
ℓ7: Width of soil buried fixing device
ℓ8: Length of soil buried fixing device
b1: Width of H-beam insert
b3: width of the center of the trapezoidal earth plate
x: half the length of the center of the earth plate
L: Length of earth plate excluding H-beam insert

Claims (7)

A plastic earth plate having a stepped protrusion at the top of the front part and a stepped depression at the bottom of the front part, and a drain hole penetrating the top and bottom and a connecting protrusion at the top,
The plastic earth plate has a flexural stiffness equal to or higher than that of any wooden earth plate, and the thickness (

) Is calculated according to Equation 3 below:
[Equation 3]

In the above formula,

Is the thickness of the plastic earth plate,

Is the thickness of the arbitrary wooden earth plate assuming the same height as the plastic earth plate,

Is the elastic modulus of the plastic earth plate,

Is the modulus of elasticity of the arbitrary wood earth plate. The method of claim 1,
The plastic earth plate is a plastic earth plate, characterized in that further formed with a connecting steel pipe insertion hole passing through the top and bottom. delete The method of claim 1,
The plastic earth plate has an H-beam insertion part having a certain width b1, an inclined part whose width increases in the direction of the front part of the plastic earth plate, and a certain width b3 based on the longitudinal section cut in the direction horizontal to the ground. It is a structure including a central part with ),
It is a symmetrical shape based on the center of the plastic earth plate,
The length (L) of the plastic earth plate excluding the left and right H-beam inserts, half the length of the center (x), the width of the H-beam insert (b1), and the width of the center (b3) satisfy Equation 4 below. Plastic earth plate, characterized in that:
[Equation 4]

The method according to any one of claims 1, 2 and 4,
The plastic earth plate, wherein a connection groove that can be fitted with the connection protrusion is formed, and a soil buried fixing device is further formed on the plastic earth plate. The method of claim 5,
Wherein the soil buried fixing device is a plastic earth plate, characterized in that the 5 ~ 30mm protruding to the rear portion of the plastic earth plate after being bound to the upper part of the plastic earth plate. A plastic earth plate that is installed between H-beams at regular intervals, has a stepped protrusion at the top of the front part and a stepped depression at the bottom of the front part, and has a drain hole and a connecting steel pipe insertion hole passing through the top and bottom, and a connection protrusion formed at the top;
A soil buried fixing device having a connection groove that can be fitted with the connection protrusion of the plastic earth plate, and having a drain groove and a connection steel pipe insertion groove having the same shape as the drain hole and the connection steel pipe insertion hole of the plastic earth plate; And
A prefabricated plastic earth plate assembly comprising a connecting steel pipe insertion hole of the plastic earth plate and a connection steel pipe inserted through the connection steel pipe insertion groove of the soil buried fixing device,
The plastic earth plate has a flexural stiffness equal to or higher than that of any wooden earth plate, and the thickness (

A prefabricated plastic earth plate assembly, characterized in that) is calculated according to Equation 3:
[Equation 3]

In the above formula,

Is the thickness of the plastic earth plate,

Is the thickness of the arbitrary wooden earth plate assuming the same height as the plastic earth plate,

Is the elastic modulus of the plastic earth plate,

Is the modulus of elasticity of the arbitrary wood earth plate.

Images