KR101847462B1 - Self-retaining wall and its construction method - Google Patents

Abstract

The present invention provides a self-retaining wall structure capable of easily constructing a section with a narrow land border line; and a construction method thereof. According to the present invention, the self-retaining wall structure comprises: a vertical member including beams or channels vertically installed at constant intervals; a tensile material obliquely installed from a top part of the vertical member, and including any one or composite among a steel wire, a steel rod, a precast concrete (PC) steel wire, a soft PC steel wire, a PC steel rod, and a steel pipe, wherein a lower part is surrounded by a grouting material; a block to interconnect a top of the vertically material and a top of the tensile material; a sleeve embedded in the block; a plate installed on an upper part of the block; and a connection material including a protection cap installed on the plate. Moreover, the method comprises: (S I) a step of using a striker to strike and install the vertical material on the ground; (S II) a step of forming a block base; (S III) a step of forming a drilling hole; (S IV) a step of inserting and installing the tensile material in the drilling hole; and (S V) a step of forming the block; (S VI) a step of exposing the tensile material to an upper part of the block and, at the same time, installing the plate, and installing the protection cap on the upper part of the plate.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-

The present invention relates to a self-supporting type earth retaining structure and a method of constructing the self supporting type earth retaining structure, and more particularly, to a self-supporting type triangular retaining structure applicable to a narrow section of a downtown area and a construction method thereof.

The retaining structure method is a temporary structure to prevent the surrounding soil or groundwater from entering the excavation ground in the excavation when making the foundation, pile foundation, and underground structure.

It is used temporarily in construction. It is used temporarily to construct the main structure. It has been neglected in the past. In recent years, the construction has become bigger and complicated, and the cost, construction amount, It has become very important because it has grown.

The retaining wall construction method consists of a retaining wall supporting the surrounding soil and a supporting material supporting the retaining wall, and can be classified into various types depending on the type of the retaining wall and the supporting material.

Typical retention methods include H beam and ash plate method, sheet pile method, co-extrusion type retaining method, and slurry wall method.

H beam and ash plate method is a method of installing H-beams at regular intervals and simultaneously installing earth plates by sandwiching soil plate between H beams. By supporting strut braces or anchors to support the earth retaining walls, construction is relatively simple and economical And the air is short but the water repellency is low, grouting reinforcement is required, and a countermeasure against the heaving phenomenon is required.

The sheet pile method is a method of forming a retaining wall by connecting steel sheet piles continuously. This method is suitable for soft ground because of its high water permeability.

The main thermal type earth retaining method is a method in which continuous casting of cast concrete piles is carried out to form an earth retaining wall by reinforcement of reinforcing bars and H beams in the pile.

The low noise method has a drawback in that it has excellent water repellency, high rigidity of the wall and low surrounding settlement, but the air is relatively long and the construction cost is increased.

In the main thermal cladding method, CIP method is used to excavate the ground with a boring machine, fill the prefabricated reinforcing bars and coarse aggregate in the hole, inject the mortar, and mix the soil in the excavation hole with the cement paste. There is a sole cement method in which a press is applied.

The slurry wall method uses a stabilizer to prevent the collapse of the ground during excavation of the ground, excavates it, puts a reinforcing net in it, and installs a concrete piling wall continuously by pouring concrete into it. This method is suitable for downtown construction considering safety of construction, pollution problem, influence of neighboring buildings.

Due to the nearby structures (roads, buildings, etc.) at the excavation of the downtown area, the excavation method has to apply the limited construction method. In the representative downtown excavation method, the H beam is used as the main material to type at the planned location, It is generally used.

At this time, as a method for forming a wall between the H beams, a wood plate (H beam and soil plate method) or a cast-in-place pile, that is, soil cement and a cast concrete piling method,

In case of using cast-in-place pile, concrete is placed on the top of it and the H beam and the upper part of the cast-in-place pile are integrated to fix the upper part.

In the conventional case, the cap beam was used only to suppress the horizontal line of the H beam and to suppress the displacement of the concrete pile on the spot.

In other words, it could not be used as a wale to support the wall during excavation.

Therefore, in order to excavate it, it is necessary to separately install the first-stage wale band near the lower part thereof, and thus there is a problem that the construction is uneconomical.

Particularly, all of the above-mentioned methods have a problem in that it is not possible to actually apply the earth pressure in the section where the site boundary line of the urban area is narrow.

Registration No. 10-1241566 (Registered on March 3, 2013)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a self-supporting type cladding structure and a self-supporting type cladding structure for realizing a triangular- The purpose of the construction method is to provide.

In order to accomplish the above object, the self-supporting type earth retaining structure according to the present invention comprises a vertical member having a plurality of vertically arranged beams and a light weight channel at regular intervals; A tensile material disposed at an angle from the upper end of the vertical member at an angle and made of any one or a combination of a steel wire, a steel bar, a PC steel wire, a PC steel wire, a PC steel bar and a steel pipe and surrounded by a grout; A block having a predetermined shape and a material and interconnecting the upper end of the vertical member and the upper end of the tension member; A sleeve embedded in the block; A plate disposed on top of the block; And a protective cap made of a protective cap disposed on the plate,
The steel pipe is made of a pore tube, the pore is filled with the grout material, and the pore is discharged to the outside so that the periphery of the pore tube is surrounded by the grout material. In the predetermined position of the pillar, And a reinforcing plate in which both ends of the horizontal member are recessed and formed with a constant curvature,
Said block comprising 25 to 30 parts by weight of methyl methacrylate; 25 to 30 parts by weight of polypropylene glycol acrylate; 5 to 10 parts by weight of butyl acrylate; 4-5 parts by weight of polyoxypropylene glycerol triether; 0.1 to 1 part by weight of lithium silicate; 1 to 2 parts by weight of a surfactant; 1 to 2 parts by weight of a polycarboxylic acid-based fluidizing agent; And 30 to 38 parts by weight of water,
The titanium dioxide composition was coated on the surface of the resin block composition with 0.57 mol / l TiO 2 sol prepared from Ti [OCH (CH 3) 2] 4 and (CH 3) 2 CHOH, C 8 H 2 O 4 Si 0.34mol / ℓ of SiO2 sol prepared from (CH3) 2CHOH, 0.5mol / ℓ of ZnO sol prepared from Zn (C2H3O2) 2, and Silver were prepared and mixed with TiO2 sol, SiO2 sol and ZnO sol Treated aqueous solution or powder.

In order to accomplish the above object, there is provided a self-supporting type earth retaining structure construction method comprising: a vertical member having a plurality of vertically arranged beams or light channels at regular intervals; A tensile material disposed at an angle from the upper end of the vertical member at an angle and made of any one or a combination of a steel wire, a steel bar, a PC steel wire, a PC steel wire, a PC steel bar and a steel pipe and surrounded by a grout; A block having a predetermined shape and a material and interconnecting the upper end of the vertical member and the upper end of the tension member; A sleeve embedded in the block; A plate disposed on top of the block; And a protective cap made of a protective cap disposed on the plate,
The steel pipe is made of a pore tube, the pore is filled with the grout material, and the pore is discharged to the outside so that the periphery of the pore tube is surrounded by the grout material. In the predetermined position of the pillar, And a reinforcing plate in which both ends of the horizontal member are recessed and formed with a constant curvature,
Said block comprising 25 to 30 parts by weight of methyl methacrylate; 25 to 30 parts by weight of polypropylene glycol acrylate; 5 to 10 parts by weight of butyl acrylate; 4-5 parts by weight of polyoxypropylene glycerol triether; 0.1 to 1 part by weight of lithium silicate; 1 to 2 parts by weight of a surfactant; 1 to 2 parts by weight of a polycarboxylic acid-based fluidizing agent; And 30 to 38 parts by weight of water,
The titanium dioxide composition was coated on the surface of the resin block composition with 0.57 mol / l TiO 2 sol prepared from Ti [OCH (CH 3) 2] 4 and (CH 3) 2 CHOH, C 8 H 2 O 4 Si 0.34mol / ℓ of SiO2 sol prepared from (CH3) 2CHOH, 0.5mol / ℓ of ZnO sol prepared from Zn (C2H3O2) 2, and Silver were prepared and mixed with TiO2 sol, SiO2 sol and ZnO sol A method of constructing a self-supporting earth retaining structure made of a treated aqueous solution or powder,
Step (S Ⅰ) of installing a hull using a hinge;
(SII) excavating the upper end of the vertical member including the vertical member to a predetermined depth and width to form a block foundation;
Piercing the lower foundation of the block foundation at a predetermined diameter and depth to form a perforation hole (SIII);
Inserting a tensile material into the perforation hole (SIV);
(S V) forming a block by inserting a sleeve at the top of the tensile material and providing a mold around the mold, and curing and curing the block composition;
Exposing the tensile material to an upper portion of the block, providing a plate, and installing a protective cap on the plate (S VI).

As described above, the self-supporting earth retaining structure according to the present invention and the method of constructing the same according to the present invention are structured with the most structurally stable triangular shape as a whole, so that the structure can be easily constructed regardless of the earth pressure, There is an advantage in construction.

1 is a view showing an example of a self-supporting type earth retaining structure according to the present invention,
Fig. 2 is a detailed view showing an enlarged view of a portion A in Fig. 1,
3 is a process diagram showing a construction process of a self-supporting type earth retaining structure according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an exemplary view showing a self-supporting type earth retaining structure according to the present invention, and FIG. 2 is an enlarged view showing a portion A in FIG.

As shown in these drawings, the self-supporting earth retaining structure according to the present invention includes a vertical member 100 having a plurality of vertically arranged beams or light channels at regular intervals; A tensile material 200 surrounded by a grout material and a lower portion formed of a steel material, a steel bar, a PC steel wire, a PC steel wire, a PC steel bar, and a steel pipe, ; A block 310 connecting the upper end of the vertical member 100 and the upper end of the tension member 200 and having a predetermined shape and material; A sleeve 320 built into the block 310; A plate 330 disposed on top of the block 310; And a connection member 300 composed of a protection cap 340 disposed on the plate 330.

That is, the self-supporting type earth retaining structure according to the present invention is a structure in which the vertical member 100, the tension member 200, the connecting member 300, and the horizontal member 400 are organically coupled.

Here, the vertical member 100 is composed of a beam or a lightweight channel, and a plurality of vertical members are arranged at regular intervals.

Particularly, it is preferable to use the H beam, which is a structural steel, which is commonly used in the construction site, but it is possible to use a channel in a structure where the earth pressure is less structurally.

The vertical member 100 can be vertically lowered when the lower portion of the vertical member 100 is a hard ground. However, in the case of the soft ground, there is a risk of sinking the vertical member 100, The lower plate 500 can be installed in a manner that the tip cross-sectional area is enlarged at the tip.

The lower plate 500 may be a separate structure for facilitating the drawing of the vertical member 100.

The tensile material 200 can be basically made of a non-prestressing tensile material 200 such as a steel wire, a steel bar or a steel pipe, and it is also possible to use a PC steel wire, a PC steel wire, and a PC steel bar capable of being prestressed later .

And a PC steel bar or the like, or a combination of the above steel wires, a steel bar, a PC steel bar, a PC steel bar, or a PC steel bar according to the site conditions, and is configured to be surrounded by the grout material at a lower portion thereof, .

The steel pipe is made of a pore tube, and the grout material is filled in the pore tube and discharged to the outside so that the periphery of the pore tube is surrounded by the grout material and is inclined at a predetermined angle from the upper end of the vertical material do.

On the other hand, the lower portion of the PC tensile material 200 is coated with a grout material so as to serve as a fixed stage when prestressing.

The connection member 300 may include a block 310 having a predetermined shape and material; A sleeve 320 built into the block 310; A plate 330 disposed on top of the block 310; And a protective cap 340 disposed on the plate 330.

Here, the block 310 may be a resin block made of a concrete block composition or a resin composition made of cement, sand and gravel, and if necessary, 10 parts by weight of a resin block composition described below may be mixed with 100 parts by weight of the concrete block composition It should be noted that

Particularly, when a resin block is used in place of the concrete block, the resin block contains 25 to 30 parts by weight of methyl methacrylate; 25 to 30 parts by weight of polypropylene glycol acrylate; 5 to 10 parts by weight of butyl acrylate; 4-5 parts by weight of polyoxypropylene glycerol triether; 0.1 to 1 part by weight of lithium silicate; 1 to 2 parts by weight of a surfactant; 1 to 2 parts by weight of a polycarboxylic acid-based fluidizing agent; And 30 to 38 parts by weight of water.

That is, the resin block is composed of methyl methacrylate, polypropylene glycol acrylate, butyl acrylate, polyoxypropylene glycerol triether, lithium silicate, surfactant, polycarboxylic acid-based fluidizing agent and water 30 to 38.

Here, the methyl methacrylate is used for improving flexibility and viscoelasticity, and its content is preferably 25 to 30 parts by weight.

Particularly, when the content of methyl methacrylate is more than 30 parts by weight, the softness and viscoelasticity are improved but the viscosity is lowered to lower the workability and price competitiveness. If the content of methyl methacrylate is less than 25 parts by weight, The improvement effect may be weak.

The polypropylene glycol acrylate is a kind of organic solvent, and it is preferable to use 25 to 30 parts by weight in order to sufficiently improve the polymerizability of the monomer part and lower the content of the solvent.

The reason for limiting the content of butyl acrylate to 5 to 10 parts by weight is to secure a stable tensile strength of concrete. In the case of conventional concrete, after 28 days of aging after concrete pouring, the strength is 18 MPa, It can be seen that the concrete made of the water-soluble resin of the present invention is significantly higher at 46.08 MPa for one day, 52.14 MPa for 2 days, and 57.88 MPa for 3 days.

On the other hand, the polyoxypropylene glycerol triether has a strong dispersing and emulsifying power and is excellent in interfacial adsorption, so that the polyurethane raw material can be easily mixed.

The amount of the polyoxypropylene glycerol triether is preferably 4 to 5 parts by weight, and when the polyoxypropylene glycerol triether is less than 4 parts by weight, the viscosity of the polyoxypropylene glycerol triether is low and mixing in the water-soluble resin may be difficult. When the content of the flour is greater than 5%, a large amount of bubbles in the water-soluble resin may occur.

In addition, the lithium silicate may penetrate the concrete block and react with calcium hydroxide to form an insoluble calcium silicate hydrate.

Lithium silicate makes the structure of the concrete block more rigid and has the effect of improving the durability of the concrete block.

The amount of the lithium silicate is preferably 0.1 to 1 part by weight.

On the other hand, the reason for limiting the content of the surfactant to 1 to 2 parts by weight is to promote curing of the concrete block.

Here, the above surfactant is ethoxylated nonylphenyl.

In addition, the polycarbonate-based fluidizing agent provides fluidity more than 120 minutes, high strength, high flowability concrete, solution of slump flow loss, maintenance of concrete viscous slump, freely adjustable, high water- Excellent workability and bleeding suppression effect in use of mesh cloth and bottom angel, good workability and stable freezing and thawing resistance, and 1 ~ 2 weight as eco-friendly material It is preferable to make the portion.

Particularly, it is preferable to use polyethylene glycol sulfonic acid ether or polyethylene glycol methacrylic acid as the polycarboxylic acid-based fluidizing agent.

The polycarboxylic acid-based fluidizing agent is used for high-density concrete, self-charging type concrete, large high-rise structure, and 60 n / mm 2 high strength high dynamic concrete.

On the other hand, the water used for the resin block is preferably clean water and is preferably 30 to 38 parts by weight.

The surface of the resin block as described above may be coated with a titanium dioxide composition having a self-cleaning function.

Here, the titanium dioxide composition is composed of 0.57 mol / l TiO 2 sol prepared from Ti [OCH (CH 3) 2] 4 and (CH 3) 2 CHOH, 0.44 mol SiO 2 sol prepared from C 8 H 2 O 4 Si and (CH 3) 2 CHOH / ℓ, ZnO sol prepared from Zn (C 2 H 3 O 2) 2 and silver were prepared and treated with TiO 2 sol, SiO 2 sol, ZnO sol and Silver in weight ratio of aqueous solution or powder. under,

It is composed of 100 parts by weight of TiO2 sol, 80 parts by weight of SiO2 sol, 18 parts by weight of ZnO sol and 2 parts by weight of silver, as an aqueous solution or powder.

The above titanium dioxide composition solves the problems of prevention of deterioration of the concrete block and the problems of film strength, durability, transmittance of visible light, deterioration of photocatalytic activity, sufficient photochemical reaction in a small amount of ultraviolet energy, The deodorizing effect, the antifouling effect and the sterilizing effect can be manifested by the decomposition of the microorganism and the microbial sterilization mechanism.

A horizontal member 400 horizontally interconnecting a predetermined position of the tension member 200 at a predetermined position of the vertical member 100 is disposed and the horizontal member 400 is a plate or bar member.

In particular, the horizontal member 400 may be formed of a reinforcing plate or a claw-like reinforcing plate formed with both ends thereof being curved with a predetermined curvature.

One end of the horizontal member 400 is welded and fixed to the vertical member 100, and the other end is installed to surround the outer peripheral surface of the tension member 200.

The self-supporting type earth retaining structure according to the present invention having the above-described structure can be constructed in a triangular shape having the most structurally stable cross-sectional shape, so that the structure can be easily constructed regardless of the earth pressure, have.

Hereinafter, the construction of the self-supporting type earth retaining structure according to the present invention will be described.

3 is a process diagram showing a construction process of the self-supporting type earth retaining structure according to the present invention.

As shown in this drawing, the method of constructing a self-supporting type earth retaining structure according to the present invention comprises a step (S I) of installing a vertical member (100) on a ground using a hover; (SII) excavating the vicinity of the upper end of the vertical member (100) including the vertical member (100) to a predetermined depth and width to form a block foundation; Piercing the lower foundation of the block foundation at a predetermined diameter and depth to form a perforation hole (SIII); Inserting a tensile material (200) into the perforation hole (S IV); (S V) forming a block 310 by inserting a sleeve 320 at the upper end of the tensile material 200 and forming a mold around the mold 320, and placing and curing the block composition; Exposing the tensile material 200 to the upper part of the block 310 and installing the plate 330 and installing the protection cap 340 on the plate 330. [

Also, after the vertical member 100 is mounted on the ground according to the site conditions, the vertical member 100 may be vertically perforated from the vertical member 100 before the block foundation is formed to fill the ground with the grout material, .

The reason for doing this is to counter the vertical component applied to the vertical member 100.

In addition, a step (S VII) of horizontally installing the horizontal member 400 at a predetermined height from the predetermined position of the vertical member 100 to the tensile member 200 embedded in the ground is added according to the site conditions.

That is, in the method of constructing the self-supporting retaining structure according to the present invention, the vertical member 100 is installed on the ground using a propeller and the upper end of the vertical member 100 including the vertical member 100 is excavated with a predetermined depth and width And a tensile material (200) is inserted into the perforation hole. The tensile material (200) is inserted into the perforation hole. The tensile material (200) The block 310 is formed by inserting and molding the block composition and exposing the tensile material 200 to the upper portion of the block 310 while simultaneously pressing the plate 330 And a protective cap 340 is installed on the upper portion of the plate 330. The horizontal member 400 is horizontally moved from a predetermined position of the vertical member 100 to a tensile material 200 buried in the ground, Install every height Self-supporting type earth retaining structure.

The construction method of the self-supporting type earth retaining structure according to the present invention having the steps as described above can be realized by constructing the entire cross-sectional shape as the most structurally stable triangle shape, thereby easily constructing the structure regardless of the earth pressure, can do.

The preferred embodiments described in the specification of the present invention are intended to be illustrative, not limiting, and the scope of the present invention is indicated by the appended claims, and all modifications that come within the meaning of the claims are included in the present invention. .

100: vertical member 200: tensile member
300: connector 310: block
320: Sleeve 330: Plate
340: protective cap 400: horizontal material
500: Lower plate

Claims (4)

A vertical member made of a beam or a lightweight channel, the vertical members being arranged at regular intervals and vertically arranged; A tensile material disposed at an angle from the upper end of the vertical member at an angle and made of any one or a combination of a steel wire, a steel bar, a PC steel wire, a PC steel wire, a PC steel bar and a steel pipe and surrounded by a grout; A block having a predetermined shape and a material and interconnecting the upper end of the vertical member and the upper end of the tension member; A sleeve embedded in the block; A plate disposed on top of the block; And a protection cap disposed on the plate, wherein the steel pipe is formed of a pore, the grout material is filled in the pore, and the periphery of the pore is surrounded by the grout material, A horizontal member arranged horizontally to a predetermined position of the tension member at a predetermined position of the vertical member is disposed and a reinforcing plate in which both ends of the horizontal member are formed with a constant curvature and the block is made of 25 to 30 parts by weight of methyl methacrylate ; 25 to 30 parts by weight of polypropylene glycol acrylate; 5 to 10 parts by weight of butyl acrylate; 4-5 parts by weight of polyoxypropylene glycerol triether; 0.1 to 1 part by weight of lithium silicate; 1 to 2 parts by weight of a surfactant; 1 to 2 parts by weight of a polycarboxylic acid-based fluidizing agent; (CH3) 2] 4 and (CH3) 2, wherein the titanium dioxide composition is coated on the surface of the resin block composition with a titanium dioxide composition having a self- 0.50 mol / l of TiO2 sol prepared from 2-CHOH, 0.44 mol / l of SiO2 sol prepared with (C8H20O4Si) and (CH3) 2CHOH, 0.5 mol / l of ZnO sol prepared from Zn (C2H3O2) 2, Wherein the solution is in the form of an aqueous solution or powder in which TiO2 sol, SiO2 sol, ZnO sol and Silver are treated in combination. delete delete A vertical member made of a beam or a lightweight channel, the vertical members being arranged at regular intervals and vertically arranged; A tensile material disposed at an angle from the upper end of the vertical member at an angle and made of any one or a combination of a steel wire, a steel bar, a PC steel wire, a PC steel wire, a PC steel bar and a steel pipe and surrounded by a grout; A block having a predetermined shape and a material and interconnecting the upper end of the vertical member and the upper end of the tension member; A sleeve embedded in the block; A plate disposed on top of the block; And a protection cap disposed on the plate, wherein the steel pipe is formed of a pore, the grout material is filled in the pore, and the periphery of the pore is surrounded by the grout material, A horizontal member arranged horizontally to a predetermined position of the tension member at a predetermined position of the vertical member is disposed and a reinforcing plate in which both ends of the horizontal member are formed with a constant curvature and the block is made of 25 to 30 parts by weight of methyl methacrylate ; 25 to 30 parts by weight of polypropylene glycol acrylate; 5 to 10 parts by weight of butyl acrylate; 4-5 parts by weight of polyoxypropylene glycerol triether; 0.1 to 1 part by weight of lithium silicate; 1 to 2 parts by weight of a surfactant; 1 to 2 parts by weight of a polycarboxylic acid-based fluidizing agent; (CH3) 2] 4 and (CH3) 2, wherein the titanium dioxide composition is coated on the surface of the resin block composition with a titanium dioxide composition having a self- 0.50 mol / l of TiO2 sol prepared from 2-CHOH, 0.44 mol / l of SiO2 sol prepared with (C8H20O4Si) and (CH3) 2CHOH, 0.5 mol / l of ZnO sol prepared from Zn (C2H3O2) 2, A method of constructing a self - supporting type earth retaining structure composed of TiO2 sol, SiO2 sol, ZnO sol and Silver combined with an aqueous solution or a powder state, comprising the steps of installing a vertical material on the ground using a propeller (S Ⅰ); (SII) excavating the upper end of the vertical member including the vertical member to a predetermined depth and width to form a block foundation; Piercing the lower foundation of the block foundation at a predetermined diameter and depth to form a perforation hole (SIII); Inserting a tensile material into the perforation hole (SIV); (S V) forming a block by inserting a sleeve at the top of the tensile material and providing a mold around the mold, and curing and curing the block composition; Exposing a tensile material to an upper portion of the block and installing a plate, and installing a protective cap on the plate (S VI).

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