KR20040064764A - Prefabricated retaining walls made of iron and the method for installing the same - Google Patents

Abstract

PURPOSE: A steel lagging assembly for retaining of earth and an installation method thereof are provided to prevent noise and vibration in mounting the earth-retaining structure by assembling steel lagging members after excavating, and to install the steel lagging assembly easily by obtaining the large working space without additional knee bracing or strut. CONSTITUTION: In an installation method of a temporary earth-retaining structure, the excavation region is formed with digging the foundation area and surroundings thereof. Plural steel lagging members(10) are combined horizontally in the excavation region to install a band-type steel lagging assembly(1). The depth of the excavation region is increased under the steel lagging assembly by digging earth inside the steel lagging assembly. The depth of the steel lagging assembly is increased by assembling plural steel lagging members with the lower part of the steel lagging assembly. The ground is stabilized with increasing the depth of the excavation region and the depth of the steel lagging assembly repeatedly.

Description

Prefabricated retaining walls made of iron and the method for installing the same}

The present invention relates to a prefabricated iron earth plate for the earthenware and a method for installing the same, and in particular, in the underground excavation work for the construction of foundations for bridges and various buildings, the earthenware is squeezed to a predetermined depth, and then the iron earth plate member is squeezed in the excavation space. The present invention relates to a prefabricated iron earth plate for a mud wall and a method for installing the mud wall, which allows the wall surface of an excavation space to be supported and to repeat the above-described process without generating a lot of noise and vibration.

When digging work for the foundation of bridges and other structures, the soil must be blocked to prevent the soil and rock from falling around the excavated excavation space. It can be divided into temporary soil barriers, which are installed only to prevent temporary collapse of soil walls at the time of excavation and then dismantled after construction.

Figures 1a to 1d is a description of the conventional construction of the temporary clogging method, of which Figures 1a and 1b relates to the construction of the temporary clogging pile using the H-beam pile and lumber earth plate, Figures 1c and 1d Relates to a sheet-pile process.

Referring to Figures 1a and 1b, conventional scaffolding pile pile method has a plurality of H-shaped steel piles (A1) in a square shape on the ground (G) to surround the area to build the concrete foundation (CN) and the working free space around it While driving the excavation work while inserting the wood earth plate (A2) laminated between the H-beam piles (A1) to support the earth wall or rock wall. Along with this, a band A3 is installed in the transverse direction in front of the H-beam piles A1, and a plurality of support beams A4 are installed between the wall and the wall so that the H-beam piles A1 can withstand the earth pressure. And the edge of the wall and the end of the braces (A4) to install a knee bracing (Knee bracing; A5).

1C and 1D, the conventional sheet pile method embeds a plurality of sheet piles B1 into the ground G and surrounds the ground to surround the area where the concrete foundation CN is to be constructed and the marginal area around it. Proceed to work. At this time, the annular ends of the adjacent sheet piles are engaged with the annular ends of the left and right sides of the sheet piles B1 so that there is no gap between the sheet piles, thereby obtaining a water blocking effect. In the case of the sheet pile method, the earth pressure is supported by installing the band B3 in the horizontal direction in front of the sheet piles B1 and by installing the nibracing B5.

As mentioned above, the temporary scaffold pile method and the sheet pile method require a lot of braces and nibracing to be installed in the excavation space to support the earth pressure applied to the H-beam pile and the sheet pile. CN) and the pillar (PL) has a disadvantage in that the work becomes inconvenient.

In addition, by vibrating hammer using a crane directly to the H-beam pile and seat pile (drive) to insert a lot of noise and vibration is generated. In recent years, when constructing new roads such as high-speed national highways, there are many cases of constructing them in the form of bridges.In particular, when farmhouses and barns are located near where the foundations of the bridges are to be built, due to the loud noises and vibrations generated during driving, There was a problem that the construction company had difficulty in preparing a compensation plan to resolve the complaints because damage to nearby farms.

The present invention is to install a temporary mud fence quietly without generating noise and vibration in order to solve the problem that the conventional mud temporary installation method caused a loud noise and vibration when the H-beam pile or sheet pile directly hits the ground It is an object of the present invention to provide a prefabricated iron earth plate and a method for installing the same.

In addition, the present invention is to support the earth pressure without installing such a bracing to solve the problem that the conventional earthquake provisional construction method to install a plurality of bracing and knee bracing in the excavation space to narrow the work space to support the earth pressure It is an object of the present invention to provide a prefabricated steel earth plate for earthing which can be widely secured and a method of installing the same.

1A and 1B are a perspective view and a plan view of a conventional temporary clogging apparatus using an H-beam pile and a laminar earth plate, and FIGS. 1C and 1D are a plan view and a cross-sectional view of the temporary blocking apparatus using a sheet pile.

Figure 2a is a perspective view of the iron earth plate member 10 constituting the prefabricated iron earth plate for earthenware according to the present invention, Figure 2b is a cross-sectional view taken along the line AA 'of Figure 2a.

3 and 4 are a perspective view and a plan view of a prefabricated iron earth plate for earthenware according to a first embodiment of the present invention.

5a to 5i sequentially show the installation method of the prefabricated iron earth plate for the earthenware according to the present invention.

Figure 6 is a cross-sectional view showing a combined state of the iron earth plate member 10 and the H-shaped steel 20 constituting the prefabricated iron earth plate for earthenware of the present invention.

7a and 7b are a perspective view and a cross-sectional view showing a coupling state of the H-beams 20 of FIG.

8 and 9 are a perspective view and a plan view of a prefabricated iron earth plate for earthenware according to a second embodiment of the present invention.

10 and 11 are a perspective view and a plan view of a prefabricated iron earth plate for earthenware according to a third embodiment of the present invention.

12A and 12B are a plan sectional view and a cross-sectional view showing the H-shaped steel 20 coupled to the outer wall of the prefabricated iron earth plate for earthenware according to the fourth embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

1: prefabricated steel plate 2: reinforcing strip

3: excavation space 10: steel earth plate member

11a: upper surface portion 11b: lower surface portion

11c: side portion 12: corrugated surface portion

13, 14, 23: Bolt hole 20: H-beam

21: web 22: flange

25: connecting plate 30: order sheet

In order to achieve the above objects, the installation method of the prefabricated earthenware earthenware plate provided by the present invention, the initial to form the excavation space (3) by digging out the earth and sand of the area where the foundation is to be built and the working free area around the predetermined depth Gulto stage; An initial steel earth plate assembly step of installing a strip-shaped prefabricated iron earth plate 1 by binding a plurality of iron earth plate members 10 in the excavation space 3 in a transverse direction; A subsequent excavation step of digging further soil in the inner space of the prefabricated iron earth plate 1 to extend the depth of the excavation space 3 below the prefabricated iron earth plate 1; And an additional step of expanding the iron earth plate to increase the depth of the prefabricated iron earth plate 1 by further binding the plurality of iron earth plate members 10 to the lower part of the prefabricated iron earth plate 1. It is characterized by repeating the subsequent step of excavation and the iron earth plate expansion step until reaching the ground.

In addition, the prefabricated iron earth plate for earthenware provided by the present invention to achieve the above objects are assembled in a tubular form by binding a plurality of iron earth plate member 10 in a stacking manner in the excavation space (3) formed to a predetermined depth. In one embodiment, each of the iron earth plate member 10 is a corrugated surface portion 12 provided between the upper surface portion 11a and the lower surface portion 11b and the upper surface portion 11a and the lower surface portion 11b disposed side by side to face each other. And two side portions 11c formed opposite to the left and right sides of the corrugated surface portion 12 and each of the upper and lower ends thereof meet with both ends of the upper surface portion 11a and the lower surface portion 11b. .

Hereinafter, with reference to the accompanying drawings will be described in detail the prefabricated iron earth plate for earthenware according to the present invention and its installation method.

Figure 2a is a perspective view of the iron earth plate member 10 constituting the prefabricated iron earth plate for earthenware according to the present invention, Figure 2b is a cross-sectional view taken along the line AA 'of Figure 2a.

The steel earth plate member 10 has a corrugated surface portion 12 and a corrugated surface portion 12 formed between the upper surface portion 11a and the lower surface portion 11b, the upper surface portion 11a and the lower surface portion 11b, which are disposed to face each other. It is comprised by the both side parts 11c formed in the left-right side of (). The iron earth plate member shown in FIG. 2A is straight, and an iron earth plate curved at a predetermined curvature is used for the bent portion of the temporary soil block. By forming two to three wrinkles on the corrugated surface portion 12 of the iron earth plate member 10, it has high strength against external compressive forces and bending moments so that it can withstand without breaking.

3 and 4 are a perspective view and a plan view of a prefabricated iron earth plate for earthenware according to a first embodiment of the present invention.

Prefabricated iron earth plate (1) for earth retaining according to the present invention is a shape surrounding the plurality of iron earth plate members 10 as if stacked with bricks. Referring to FIG. 3, the upper end of the iron earth plate 1 is covered with a reinforcing strip 2 so as to be capped, and the lower end of the iron earth plate 1 is filled with the reinforcing strip 2. In addition, in the middle of the iron earth plate 1, the reinforcing strip 2 is installed for each layer of the predetermined number of iron earth plate members, and the pressure of the surrounding soil is reduced as the depth goes down underground in the excavation space, that is, the depth of the excavation is deep. In order to have more bearing capacity, the reinforcing strip 2 is provided for each of the two layers of the steel earth plate members 10 so as to have more support force, and one layer at the bottom of the steel earth plate 1. A reinforcing strip 2 is provided for each of the iron earth plate members 10 of the steel.

In addition, each of the reinforcing strips 2 is configured by connecting the plurality of H-shaped steels 20 arranged in a line by the connecting plate 30.

In the present invention, the configuration of the reinforcing strip 2 using the H-shaped steel 20 has been described, but it is also possible to use a section steel (for example, L-shaped steel) having other cross sections.

As can be seen in Figure 4, the prefabricated iron earth plate for earthenware according to the first embodiment of the present invention is circular when viewed from above. In the case of installing the earthen board with the prefabricated iron earth plate as a circle, the earth pressure around the excavated wall surface is converted into the axial compression force on the iron earth plate, and each iron earth plate member is equally supported to avoid load concentration, which is the most advantageous to endure high earth pressure. It can be called a structure.

5a to 5i schematically show the installation method of the prefabricated iron earth plate for earthenware according to the present invention according to the process of trenching.

First, when the foundation work zone C, on which the bridge foundation for the bridge is to be built, is inclined more than a predetermined allowable slope, the flattening operation is first performed (see FIGS. 5A and 5B). Then, the excavation space 3 is formed by excavating the soil to the depth of the base construction zone (C) the sum of the height of one of the steel earth plate member and a slight clearance length (see Fig. 5c). Since the height of the conventional steel earth plate member 10 is approximately 50 cm (see FIG. 2A), taking into account a slight margin, an excavation space is formed at a depth of about 50 cm to 70 cm from the ground. Subsequently, in the excavation space 3, the plurality of iron earth plate members 10 are assembled in a transverse direction as a single band to form the iron earth plate 1. On the other hand, the upper end of the iron earth plate 1 is provided with a reinforcing strip 2, the reinforcing strip 2 is configured by binding a number of H-shaped steel 20 along its longitudinal direction (see Fig. 5d).

Next, proceed to further excavation work under the iron earth plate (1) and deepen the excavation space (3) (see Figure 5d). At this time, the depth of the excavation is excavated again as much as the height of one of the iron earth plate member, that is, about 50 cm from the depth of the first excavation. In this way, while expanding the depth of the excavation space (3) by the height of one of the iron earth plate gradually expands the prefabricated iron earth plate (1) downward, until the stable ground to install a concrete foundation comes out And the iron earth plate assembly operation (iron earth plate expansion operation) is repeated (see Figs. 5e to 5i).

At this time, the reinforcing strip 2 should be installed in the middle of the prefabricated steel earth plate 1, which closely adheres the web portion 21 of the H-shaped steel 20 to the bottom of the prefabricated steel earth plate 1. After fixing by bolt coupling is made by additionally bolted fixing the new iron earth plate member 10 on the bottom of the web portion 21 again. Fig. 5i shows the iron earth plate completed through the above process.

Figure 6 is a cross-sectional view showing a combined state of the iron earth plate member 10 and the H-shaped steel 20 constituting the prefabricated iron earth plate for earthenware of the present invention.

Referring to FIG. 6, the two layers of earthenware plate members 10 and 10 'are fixed up and down, and the lowered earthenware plate member 10' is located between the H-shaped steel 20 and the earthenware plate member 10 ". At this time, the order sheet 30 is formed on the contact surface of the iron earth plate members 10, 10 ', 10 "to prevent the groundwater from leaking out between the iron earth plate members 10, 10', 10". A predetermined bolt hole is formed in the order sheet 30 so that the upper and lower portions 11a and 11b of the order sheet 30 and the steel earth plate are provided with bolts 14a, nuts 14b, and the like. By the washer 14c.

7A and 7B are a perspective view and a cross-sectional view showing the coupling state of the H-shaped steels 20 of FIG. 4, wherein the strength of the iron earth plate against the earth pressure by surrounding two H-shaped steels 20 arranged in a longitudinal direction as one is combined. To enhance. That is, the bolt 23a passes through several bolt holes 23 formed at both ends of each flange portion 22 of the two H-shaped steels 20 and bolt holes formed in the connecting plate 25, and the nut ( The two H-beams are joined by fixing using 23b) and washer 23c.

FIG. 7B is a cross-sectional view of the iron earth plate member 10 and the H-shaped steel 20 taken along the line B-B 'of FIG. 7A, and connecting plate 25 to both flanges 22 of the H-shaped steel 20. FIG. And bolted together.

8 and 9 are a perspective view and a plan view of a prefabricated iron earth plate for earthenware according to a second embodiment of the present invention, except that the planar shape of the iron earth plate 1 is not circular in comparison with the first embodiment. That is, the prefabricated iron earth plate 1 shown in FIGS. 8 and 9 is a composite of flat portions a and a 'made of a straight iron earth plate and curved portions b and b' made of a curved iron earth plate. In addition, the H-shaped steel also uses a straight H-shaped steel for the flat portions (a, a '), and a curved H-shaped steel for the curved portions (b, b').

10 and 11 are a perspective view and a plan view of a prefabricated iron earth plate for earthenware according to a third embodiment of the present invention, the shape of the prefabricated iron earth plate 1 as a whole compared to the first and second embodiments of the present invention is generally square The only difference is that the four corners consist of arcs with a predetermined curvature. That is, the prefabricated iron earth plate 1 is composed of flat portions (c, c ', d, d') and curved portions (e) of the same size facing each other. The prefabricated steel earth plate 1 having such a structure only needs to adjust the width of the planar portions c, c ', d, and d' when the concrete foundation is to be made larger or smaller, and the curved portion e may be utilized as it is. Since the same material can be used as it is, the construction cost and construction period can be shortened.

12A and 12B are a plan sectional view and a cross-sectional view showing the H-shaped steel 20 coupled to the outer wall of the prefabricated iron earth plate for earthenware according to the fourth embodiment of the present invention. In this way, when the reinforcing strip 2 'is attached to the outer wall surface of the steel earth plate 1, since there is no protruding portion of the temporary earthenware device, it is possible to secure a wide working space and reduce the risk of safety accidents. There is an advantage.

As a preliminary work for installing the reinforcing strip 2 ', first, each nut 15b, 15b' is flanged to match the bolt holes drilled in the upper and lower portions of the flange 22 of the H beam 20. Install on the inner side of). Then, the H beam 20 is positioned between the lower end of the iron earth plate member 10 located at the bottom of the iron earth plate 1 and the ground layer G, and the corrugated plate of the iron earth plate member 10 at the bottom layer. The bolt 15a is inserted into the nut 15b through the bolt hole drilled at the lower end of the 12, and then the bolt 15a is tightened so that the steel earth plate member 10 and the H beam 20 are firmly coupled. At this time, since the nut 15b is welded to the inner surface of the flange 22 of the H beam 20, even if only the bolt 15a is turned, the fastening with the nut 15b can be completed.

Subsequently, a new iron earth plate member 10 'is attached to the lower end of the pre-installed iron earth plate member 10, and the bolt (through a bolt hole drilled in the upper end of the corrugated plate 12' of the iron earth plate member 10 '). 15a ') is inserted into the nut 15b', and then the bolt 15a 'is tightened to firmly couple the iron earth plate member 10' and the H beam 20.

In each embodiment according to the present invention by interlocking the order sheet 30 to the contact surface between the iron earth plate member and the iron earth plate member and the contact surface of the iron earth plate member and H-shaped steel to prevent leakage of water in the basement layer. The order sheet uses a sheet molded into a plate from a high density synthetic resin (mainly high density polyethylene or polyurethane) well known in the art.

In addition to the shape shown in the above embodiments, the temporary earthenware device of the present invention may be manufactured in various shapes, and in consideration of the state of the ground, the earthenware is rolled up to a depth corresponding to the height of several steel earth plate members at once, and the multiple earth iron plates It is also possible to combine these in succession. In other words, in the present specification, as an installation method of the prefabricated earthenware plate for earthenware, about 50 cm at one time was excavated and one layer of the earthenware was installed, and then the excavation step was carried out again. It is also possible to dig up to the depth corresponding to the height of the two or more layers of iron earth plate at one time in consideration of the situation of vacant chuck and to install two or more layers of iron earth plate members and reinforcing strips.

In addition, in the above embodiments, a reinforcing strip is installed for each of the two layers of the steel earth plate members until the steel earth plate members of about 10 layers are installed on the assumption that 5 m or less underground is generally composed of weathered rock. In order to withstand, each steel earth plate member was to have a reinforcing strip. However, since it is preferable to determine how much space to install the reinforcing stripe according to the geological situation of the site, the number and installation intervals of the reinforcing stripe is not limited to that shown in the embodiment and the accompanying drawings.

Prefabricated iron earth plate for earthenware according to the present invention and its installation method is to excavate only a predetermined depth in underground excavation work for the construction of foundations of bridges and various buildings, and then install the iron earth plate member in the excavation space By repeating this process a number of times, it is possible to install a temporary barrier without generating loud noise and vibration. Therefore, when the conventional earthenware pile pile method or the sheet pile method is implemented, problems caused by the noise and vibration caused damage to nearby farmhouses and barns, and thus, many difficulties in handling civil complaints can be solved.

In addition, according to the present invention prefabricated iron earth plate and its installation method according to the present invention, it is not necessary to install a separate brace and knee bracing to occupy a large space in the excavation space to support the temporary earthquake against earth pressure, so that the work space is widened There is an advantage that it is easy to carry out work.

Claims (14)

In the method of installing a temporary earthen fence to prevent the sedimentation of the edge of the excavated portion during the underground excavation work for the foundation of bridges and other buildings, An initial excavation step of excavating the excavation space (3) by digging out the earth and sand of the area where the foundation is to be constructed and the working free area around the predetermined depth; An initial steel earth plate assembly step of installing a strip-shaped prefabricated iron earth plate 1 by binding a plurality of iron earth plate members 10 in the excavation space 3 in a transverse direction; A subsequent excavation step of digging further soil in the inner space of the prefabricated iron earth plate 1 to extend the depth of the excavation space 3 below the prefabricated iron earth plate 1; And And sequentially binding a plurality of iron earth plate members 10 under the prefabricated iron earth plate 1 to increase the depth of the prefabricated iron earth plate 1; The method of installing a prefabricated iron clay plate, characterized in that it is carried out by repeating the subsequent excavation step and the iron earth plate expansion step until reaching a stable ground. The soil barrier as claimed in claim 1, further comprising a flattening step of flattening the ground surface prior to the initial excavation step when the ground surface of the place where the prefabricated iron earth plate 1 is to be installed has a slope of more than a predetermined allowable slope. Installation method of prefabricated steel earth plate. The method of claim 1, wherein a predetermined depth in the initial gulting step and the subsequent gulting step has a correlation with the height of the iron earth plate member (10). According to claim 1, After the iron earth plate assembly step, prefabricated iron earth plate for earthenware, characterized in that it further comprises the step of installing the initial reinforcement bands for installing the reinforcing bands (2) on the upper end of the pre-installed prefabricated iron earth plate (1). How to install [5] The method of claim 4, wherein the initial reinforcing strip installation step is to install a plurality of H-shaped steels 20 in series along the upper end of the prefabricated iron earth plate 1 in a row. . The method according to claim 1, further comprising a reinforcing strip mounting step for installing a reinforcing strip 2 at the lower end of the prefabricated iron earth plate 1 after the subsequent excavation step. In the iron earth plate expansion step, by further binding the plurality of iron earth plate member 10 to the lower portion of the reinforcing strip (2) to increase the depth of the prefabricated iron earth plate (1), the stable ground after the initial iron earth plate assembly step The method of installing the prefabricated iron earth plate for the mudstone, characterized in that to repeat the subsequent step of the gulchung step, the installation of the reinforcing strip and the iron earth plate expansion step. 7. The method of claim 6, wherein the reinforcing strip installation step is to install a plurality of H-shaped steel (20) in series in a row along the lower end of the prefabricated iron earth plate (1). The steel plate assembly step according to claim 1, further comprising a reinforcing band installation step of installing a reinforcing band 2 along the outer wall of the prefabricated iron earth plate 1 after the iron earth plate expansion step. Thereafter, the method of installing a prefabricated iron earth plate for earthenware, characterized in that to carry out the subsequent step of the excavation step, the iron earth plate expansion step and the reinforcing strip band installation step until it reaches a stable ground. The method of claim 8, wherein the reinforcing material strip mounting step is a plurality of along the boundary line between the lowermost steel earth plate member 10 and the upper steel earth plate member 10 formed on the outer wall surface of the prefabricated iron earth plate (1) The installation method of prefabricated steel earth plate for the earth retainer, characterized in that the H-shaped steel 20 in a row in series. In the prefabricated iron earth plate for earthquakes installed to prevent the sedimentation of the edge of the rupture part during the foundation construction of bridges and other buildings, The prefabricated iron earth plate (1) is a combination of a plurality of iron earth plate member 10 in the excavation space (3) formed in a predetermined depth in a racking manner to assemble in a tubular form, Each of the iron earth plate member 10 has an upper surface portion 11a and a lower surface portion 11b disposed side by side to face each other, a corrugated surface portion 12 provided between the upper surface portion 11a and the lower surface portion 11b, and the Prefabricated for mudstone, characterized in that it is formed opposite to the left and right sides of the pleated surface portion 12 and each of the upper and lower ends are composed of two side portions (11c) that meets both ends of the upper surface portion (11a) and lower surface portion (11b) Iron earth plate. The prefabricated iron earth plate according to claim 10, wherein the prefabricated iron earth plate (1) is provided with a reinforcing strip (2) at predetermined intervals in the height direction. 12. The reinforcing steel earth plate (1) according to claim 11, wherein the reinforcing steel earth plate (1) is provided with the reinforcing material strip (2) for each of the at least two layers of the steel earth plate members (10) above the predetermined depth. A prefabricated iron earth plate for earthenware, characterized in that the reinforcing strips (2) are provided for each of the earthenware earth plate members (10) of each layer. 12. The web of each H-shaped steel according to claim 11, wherein the reinforcing strip 2 has a plurality of H-shaped steels 20 continuously arranged along the circumference of the prefabricated iron earth plate 1 to form a strip. The part 21 is a prefabricated iron earth plate for earthenware, characterized in that it is fixed in close contact with the lower surface portion (11b) of the upper steel earth plate member and the upper surface portion (11a) of the lower iron earth plate member. 12. The flange portion 22 of claim 11, wherein the reinforcing strip 2 has a plurality of H-shaped steels 20 continuously arranged on the outer wall surface of the prefabricated iron earth plate 1 to form a strip. ) Is a prefabricated iron earth plate for earthenware, characterized in that the upper surface of the iron earth plate member of the iron plate member 12 and the lower surface of the iron earth plate member 12 of the steel plate.