KR100912574B1 - Retaining wall system using strut assembly and excavating method using the same - Google Patents

Abstract

A retaining wall system using a prefabricated strut assembly and an excavation method using the system are provided to carry out excavation continuously and rapidly as the struts bear the soil pressure while supporting the load of concrete slab. A retaining wall system using a prefabricated strut assembly is as follows. A retaining wall is constructed on the ground boundary face. H-posts(30) are driven into the excavation site bordered by the retaining wall. Excavation for building of ground slab is carried out. A wale is applied to the exposed retaining wall and a bracket(40) is installed on each flange of the H-posts. Double vertical struts(210a,210b) are set up to be supported by the bracket, with each post interposed. Double horizontal outside struts(220a,220b) are set up between the double vertical struts. Double horizontal inside struts(230a,230b) are set up between the double vertical struts. A ground slab is constructed. Excavation for building of underground slab is carried out. Construction of underground slab is repeated until the designed basement.

Description

Retaining Wall System using strut assembly and Excavating Method using the same}

The present invention relates to an earthquake system, and more particularly, to an earthquake system that can easily disassemble and assemble, as well as structural aspects, such as an air shortening, construction cost reduction, etc. in terms of construction, and a method of digging using the same. will be.

The earthquake construction is constructed for the purpose of resisting the side pressure such as earth pressure and water pressure during the digging work and for the purpose of settlement of the surrounding ground and the protection of adjacent structures. It consists of a wall of mud walls directly contacting the soil and supporting ground. Thumb wall (H-pile) + earth plate, CIP (Cast-in Pile), SCW (Soil Cement Wall), and underground continuous wall are used for the wall, and Jibo is a self-supporting, strut according to its supporting structure. ), Ground anchors, and top-down structures.

The strut temporary facility, which serves as a support for earth pressure resistance, should be demolished when constructing underground structures, causing sudden stress imbalances on the wall of the earth during dismantling, as well as the risks that occur during installation and dismantling, as well as shortening the construction period and cost Improvements are needed in many ways, including the loss of savings opportunities. Top-down method is the method of constructing slab and beam of the main body of the structure and using excavation to proceed with excavation.The underground continuous wall method is a method in which the slab and beam directly bear the side pressure such as earth pressure and water pressure applied to the wall of the earth. Construct the permanent reinforced concrete wall by using the advantages of the building, construct the permanent column and foundation with the cast-in-placement pile, construct the ground floor slab to support the wall, and then excavate the ground floor slab. Construction is completed by going down from the ground to the basement in the order of construction and excavation. The reverse drilling method is suitable for the case where the working space is required due to the narrow ground area in case of deep excavation depth, irregular structure and large excavation area. However, there is a disadvantage that the working environment at the time of underground construction is poor and the cross section of the slab is likely to increase.

In this respect, various construction methods have been developed to improve the conventional soil barrier construction method to induce rationalization such as reduction of construction cost and construction cost in terms of construction as well as structural aspects. Among them, the SPS and BRD methods are as follows. .

The SPS (Strut as Permanent System) method is an alternative to the underground earthen construction support method. The steel pillars and beams for underground permanent structures are pre-installed according to the progress of the excavation work, and used as the earthwork supporters during the excavation work. It is a construction method used as a structure. In this method, the permanent beam member during underground construction must resist the lateral force due to earth pressure, so in some cases, it is necessary to increase the cross-sectional size of the H-shaped steel beam member. In addition, the permanent beam member alone is not enough to secure the planar stiffness and deformation control effect of each layer portion, additional temporary bracing members, such as horizontal bracing occurs, which also has the disadvantage that causes the increase in steel stocks. In addition, after the installation of the ground floor steel beams (brass beams) and slab concrete casting, the dig proceeds, and when the ground level of the first floor comes out, the steel beams are made by actual measurement.

BRD (Bracket R / C Downward) method minimizes formwork by using wide girder and deck slab and installs bracket and girder formwork support frame so that construction can be carried out without drift. It is a construction method that improves workability and economic efficiency by reusing. The girder formwork girder in this construction simply supports the girder formwork, and the earth pressure must be supported by the wide girder, so that the dig cannot proceed until the wide girder concrete is cured.

An object of the present invention is to provide an earthquake system that can induce rationalization such as air shortening, construction cost reduction, etc. in terms of construction as well as structural aspects by improving the conventional earthquake construction method, and an explosive method using the same.

According to a preferred embodiment of the present invention, in a retaining system comprising a retaining wall, an H-shaped support for supporting the retaining wall, and an H-shaped column installed at a trench site partitioned by the retaining wall and to which each support is connected. Brackets are fixed to the flanges of the H-shaped pillars, and the H-shaped braces are respectively supported by the brackets, and are spaced apart from each other with the pillars interposed therebetween, and a double longitudinal direction in which a joint is located on the bracket. And a double transverse outer reinforcement beam which is joined to the outside of each double longitudinal reinforcement so as to be orthogonal to the double longitudinal reinforcements, and spaced apart from each other with the pillar interposed therebetween, and the double transverse outer reinforcement beams. Double transverse medial splices joined to the inner side between the double longitudinal braces so that they are on the same line each To include, and is the double longitudinal and double beotimbo prevent lateral outer botim viewing lateral buckling are spaced apart from each other is installed provided with a retaining system, it characterized in that each connection is connected to the beam.

At this time, the joining of the double longitudinal braces, the double transverse outer braces and the double lateral inner braces, insert the 'c' section between the flange of each of the double longitudinal bracing and the 'c' section steel Bond an end plate to the ends of each of the double transverse outer braces and the double transverse inner braces, and cover the upper surface of the joint of the double longitudinal braces and the double transverse outer braces and the double transverse inner braces. They are bolted together, It is characterized by the above-mentioned.

In addition, joining of the pillar and the bracket is made by joining an end plate to an end of the bracket formed of H-shaped steel and contacting the flange of the pillar and bolting the end plate to the flange of the pillar. A stiffener is connected between the flange of the pillar to be joined and the flange of the bracket on which the double longitudinal support is mounted.

In addition, the joint of the double longitudinal brace is located on the bracket, characterized in that the end plate is bonded to each end of the double longitudinal brace to be bonded to each other and the cover plate on the upper surface and then bolted to each other .

According to another suitable embodiment of the present invention, the first step of constructing the earth wall on the ground boundary, the second step of injecting the H-shaped columns into the trench site partitioned by the earth wall, and the excavation for constructing the ground layer slab The third step is to install a bracket on each flange of the H-shaped pillars to the exposed earth wall and to install a double longitudinal braces so that each pillar is supported by the bracket, the double longitudinal direction A fourth step of installing double lateral outer braces between the double longitudinal braces and spaced apart from each other with the columns intersected so as to be perpendicular to the braces, and installing a double lateral inner brace between each double longitudinal braces And the fifth step of constructing the ground floor slab, and the excavation for constructing the basement slab, and proceeding with the third and fourth steps. Dig the method comprising repeating the steps for construction of the basement slab to design the basement is provided.

According to the present invention, since the reinforcement serves to support the earth pressure while supporting the floor slab concrete placing load, when the ground floor slab concrete is cured, the reinforcement descends to the bottom and the supporter descends to support the earth pressure while supporting the first-floor concrete load. The excavation is continuously carried out quickly and continuously, and thus the construction can be performed at a much faster speed than the existing support method.

 In addition, in the present invention, since only the outermost double longitudinal brace and the double transverse outer brace, that is, the outermost double longitudinal brace and the double transverse outer brace in contact with the retaining wall, have to be measured and manufactured, the steel production time is shortened. The manufacturing process can minimize the problem of delaying the subsequent process.

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

FIG. 1 is a plan view briefly showing the earth screen system according to the present invention as a whole, and FIG. 2 is an enlarged view of portion “A” of FIG. 1.

As shown in the figure, the retaining system according to the present invention shortens the construction period and improves workability by supporting the load until the slab concrete hardens the slab concrete, and at the same time, improves workability. It is a construction method of assembling Roman.

Soil system according to the present invention is installed on the digging site partitioned by the soil wall (10), the H-shaped braces (20) for supporting the soil wall (10), and the soil wall (10) and each braces (20) In the retaining system including the H-shaped pillars 30 connected to each other, a bracket 40 is fixed to each flange of the H-shaped pillars 30.

The bracket 40 is preferably made of steel having an H-shaped cross section and bolted to both flanges 31 of the column 30 to facilitate disassembly and assembly.

And the H-shaped braces 20 are composed of a pair, that is, two longitudinal longitudinal braces (210a) (210b) consisting of a pair of two, and are arranged to be orthogonal to this, each two two lateral outward consisting of a pair It consists of braces 220a and 220b and double transverse inner braces 230a and 230b.

In this case, the double longitudinal supports 210a, 210b are respectively supported by the brackets 30 and spaced apart from each other with the pillars 30 interposed therebetween, and the joints thereof are positioned on the brackets 30. It is preferable to be joined.

And double transverse outer braces (220a) (220b) are bonded to the outside of each double longitudinal braces (210a) (210b) to be orthogonal to the double longitudinal braces (210a) (210b), respectively, and the pillar (30) Spaced apart from each other, and the double transverse inner beams 230a and 230b are disposed on the same line as the double transverse outer beams 220a and 220b, respectively. The inner side is joined between 210a and 210b.

Meanwhile, the double longitudinal support beams 210a and 210b and the double transverse outer support beams 220a and 220b installed to be spaced apart from each other are connected to the connection beams 240 to prevent lateral buckling, respectively.

When the earthwork system according to the present invention constituted as described above is made to break, it is possible to solve the problem of air delay, which has been a problem in the conventional brace soil construction method. That is, in the case of the conventional reinforcement earth construction method, air is delayed because the slab concrete proceeds to dig after completely curing. However, in the case of the present invention, since the brace supports the slab concrete placing load and at the same time supports the earth pressure, after the ground layer slab concrete is cured, the brace is lowered and the brace is supported to support the earth pressure while supporting the ground concrete floor load. Since the machine continues to go fast, it is possible to proceed with construction much faster than the conventional prop retaining method.

In addition, in the case of the conventional reinforcement earth retaining method, after the ground layer steel frame installation and slab casting is completed, the destruction proceeds, and when the ground level of the first floor comes out, the air is delayed because the steel frame is produced by actual measurement. And double transverse outer braces, that is, the outermost double longitudinal brace and the double lateral outer brace that are in contact with the wall of the earth just need to be manufactured and manufactured so that the steel manufacturing time is shortened and the subsequent process is delayed due to the steel production. Can be.

Figure 3 is a plan view showing the junction ("B" portion of Figure 2) of the double longitudinal braces, the double transverse outer braces and the double transverse inner brace in accordance with the present invention.

Referring to FIG. 3, the joining of the double longitudinal braces 210a and 210b and the double lateral outer braces 220a and 220b and the double lateral inner braces 230a and 230b may include: Insert the 'c' section 250 between the flanges of each of the double longitudinal braces 210a and 210b and contact each of the double transverse lateral supports 220a and 220b in contact with the 'c' section 250 and the The end plates 260 are bonded to the ends of each double transverse inner brace 230a and 230b, and then the double longitudinal braces 210a and 210b and the double transverse outer braces 220a and 220b and the double transverse After the cover plate 270 is attached to the upper surface of the junction portion of the direction inner braces 230a and 230b, they are bolted to each other.

4 is a cross-sectional view showing the joint portion ("C" portion of Figure 2) of the pillar and the bracket.

Referring to FIG. 4, the joint of the pillar 30 and the bracket 40 includes an end plate 42 formed at the end of the bracket 40 made of H-shaped steel and in contact with the flange 31 of the pillar 30. And the end plates 42 are bolted to each other to the flange 31 of the pillar 30, wherein the brackets 40 are joined between the flanges 31 of the pillar 30 to which the bracket 40 is joined and in the double longitudinal direction. A stiffener 280 is joined between the flanges 41 of the bracket 40 on which the braces 210a and 210b are placed.

 FIG. 5 is a cross-sectional view of a joint ("D" portion in FIG. 2) of a double longitudinal brace positioned on the bracket.

Referring to FIG. 5, the joints of the double longitudinal braces 210a and 210b positioned on the bracket 40 are respectively end plates at the ends of the double longitudinal braces 210a and 210b joined to each other. 211) and the cover plate 212 is placed on the upper surface and bolted to each other.

The brace according to the present invention, which is joined and joined as described above, supports the earth pressure while supporting the slab concrete placing load, and the construction precision can be standardized and the assembly time is shortened by adjusting the length and connected by bolts without welding. It is increased and workability is excellent.

Next, a method of proceeding the excavation construction using the earthquake system according to the present invention will be described with reference to the drawings.

6a to 6f schematically show the construction of the trench using a clogging system according to the present invention in the construction order.

First, construct the earth wall (10) on the land boundary (see Figure 6a). As the wall of the wall, it is constructed with the main column wall, for example, the soil cement wall (S.C.W.), the cast-in-place concrete pile wall (C.I.P.), or the underground continuous wall (step 1).

Next, the H-type pillars 30 are inserted into the trench site partitioned by the wall of the earth 10 (see FIG. 6B). The pillar 30 is not only a part to which the support for supporting the retaining wall is connected, but also serves as a pillar that is a building structural member that shears based on the axial force of the upper layer after completion of the underground construction. Therefore, it is possible to secure accurate verticality without moving or deformation during drilling and intrusion for pillar penetration (second step).

Next, proceed to the excavation to build a ground-layer slab, and the bracket 40 is installed on each flange of the H-shaped pillars 30 by placing the strip 50 on the exposed soil wall (see Fig. 6c). At this time, after installing the strip and the first floor of the steel frame in consideration of the movement of the excavation equipment, the excavation level is selected after excavation. The bracket is made of steel having an H-shaped cross section and bolted to each flange of the column (third step).

Next, double longitudinal braces 210a and 210b are installed to be supported by the bracket 40 with each pillar 30 therebetween, and each pillar is orthogonal to the double longitudinal braces 210a and 210b. Spaced apart from each other with the 30 interposed therebetween between the double longitudinal braces 210a and 210b and between the double transverse braces 220a and 220b and between each of the double longitudinal braces 210a and 210b. Double transverse inner braces 230a and 230b are installed in the chamber (see FIG. 6D). At this time, the joints of the double longitudinal braces 210a and 210b are positioned on the bracket 40. Meanwhile, a screw jack (not shown) is connected to the ends of the outermost double longitudinal braces and the double transverse outer braces so as to be in close contact with the strip (fourth step).

Next, a synthetic deck (not shown) is installed on top of the support beams 210a and 210b (220a and 220b) and 230a and 230b, and after reinforcing reinforcing bars, the concrete is poured to construct the ground layer slab 60 (see FIG. Step 5) (see FIG. 6E).

Finally, after the ground layer slab is hardened, the process of constructing the basement slab is carried out, and after the third and fourth steps, the construction of the basement slab is repeated to the design basement layer (see FIG. 6F).

As described above, in the present invention, the double longitudinal braces, the double transverse braces and the double lateral inner braces are arranged in a grid to support the slab concrete placing load and simultaneously support the earth pressure, so that after the ground layer slab concrete is cured, When the brace is lowered and the brace is lowered to support the earth pressure while supporting the concrete load on the ground floor, it is possible to proceed with the construction at a much faster speed than the conventional brace trowel method because the trench continues continuously.

The present invention has been described above in detail by using an embodiment. The presented embodiments are exemplary and can be made by those skilled in the art to various modifications and modifications to the disclosed embodiments without departing from the spirit of the present invention. The scope of the invention is not limited by these modifications and variations, but only by the claims appended below.

1 is a plan view briefly showing an earth screen system according to the present invention.

FIG. 2 is an enlarged view of portion “A” of FIG. 1.

Figure 3 is a plan view showing the junction ("B" portion of Figure 2) of the double longitudinal braces, the double transverse outer braces and the double transverse inner brace in accordance with the present invention.

4 is a cross-sectional view showing the joint portion ("C" portion of Figure 2) of the pillar and the bracket.

FIG. 5 is a cross-sectional view of a joint ("D" portion in FIG. 2) of a double longitudinal brace positioned on the bracket.

6a to 6f schematically show the construction of the trench using a clogging system according to the present invention in the construction order.

<Description of Symbols for Major Parts of Drawings>

10: retaining wall

20: brace

30: pillar

40: bracket

210a, 210b: Double longitudinal brace

220a, 220b: Double transverse outer brace

230a, 230b: Double transverse inner brace

Claims (5)

In the retaining system comprising a retaining wall, H-shaped braces for supporting the retaining wall, and H-shaped pillars installed at the trench site partitioned by the retaining wall and connected to each brace, Brackets are fixed to each flange of the H-shaped pillars, The H-shaped braces, Double longitudinal braces each supported by the brackets and spaced apart from each other with the pillars interposed therebetween and orthogonal to the double longitudinal braces, wherein the double longitudinal braces are respectively orthogonal to the double longitudinal braces. Double transverse outer beams bonded to the outside and spaced apart from each other with the pillars interposed therebetween, and a double transverse direction bonded to the inner side between the double longitudinal braces so as to be on the same line as the double transverse outer beams. Including medial beams, The double longitudinal brace and the double transverse outer brace is installed spaced apart from each other, characterized in that the soil barrier system, characterized in that connected by connecting beams to prevent lateral buckling. The method of claim 1, Bonding of the double longitudinal braces, the double transverse outer braces and the double transverse inner braces, Inserting a 'c' section steel between the flanges of each of the double longitudinal supports, and joining an end plate to an end of each of the double transverse outer braces and the respective double transverse inner braces in contact with the 'c' beams; A trowel system comprising a cover plate attached to an upper surface of a joint of a directional brace, a double transverse outer brace and a double transverse inner brace, and then bolting them together. The method of claim 1, Bonding of the pillar and the bracket, The bracket is composed of H-shaped steel and the end plate is joined to the end of the flange of the pillar and the end plate is bolted to each other to the flange of the pillar, In this case, the stiffener is characterized in that the stiffener is bonded between the flange of the pillar to which the bracket is bonded and the flange of the bracket on which the double longitudinal support is mounted. The method of claim 1, The joint of the double longitudinal braces located on the bracket, An earth plate system, characterized in that the end plate is bonded to each end of the double longitudinal brace to be bonded to each other and the cover plate on the upper surface and then bolted to each other. The first step of constructing a wall of earth on the boundary of the earth; A second step of injecting the H-shaped pillars into the trench site partitioned by the earthen wall; A third step of proceeding with the excavation to build the ground floor slab, and attaching the bracket to the exposed soil wall and installing the brackets on each flange of the H-shaped pillars; Double longitudinal braces are installed so as to be supported by the brackets with each pillar therebetween, and double transverse outer braces between the double longitudinal braces, spaced apart from each other with each pole therebetween so as to be orthogonal to the double longitudinal braces. A fourth step of installing a double transverse inner brace between each double longitudinal brace; The fifth step of constructing the ground floor slab, The process of excavation for constructing a basement slab, and after the third and fourth steps, the step of constructing the basement slab is repeated to the design basement.

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