KR101187170B1 - Application of under pinning method in remodeling - Google Patents

Abstract

PURPOSE: A vertical extension method of a building using an inclined column and an extended column as a rahmen frame is provided to stably transfer the axle force of an existing column to the ground through an inclined column and a micro pile. CONSTITUTION: A vertical extension method of a building using an inclined column and an extended column as a rahmen frame is as follows. The surroundings of an existing column(10) and an upper beam coupled to the existing column are reinforced. Multiple micro piles(30) are installed through an existing foundation or underground beam. Inclined columns(31) are installed to connect the existing column and the top ends of the micro piles to each other. The surroundings of the existing foundation are excavated. The top portion of the existing foundation is removed to form an extended column(20a). The existing column is extended by reinforcing the outer surface of the extended column using a steel plate(21a). A steel beam is installed on the extended column. The ground is excavated. Bracings are installed to connect the micro piles exposed to the excavated ground.

Description

Vertical Down Extension Method Using Ramen Frame with Inclined Columns and Extension Columns Transmitted to Micropiles {Application of Under pinning Method in Remodeling}

The present invention relates to a vertical downward extension construction method using a ramen frame and an inclined pillar to be transmitted to the micro pile as a ramen frame, and more particularly, to install a micro pile by drilling an existing foundation or underground beam, and to install a hypothetical slope pillar. By using existing foundations as extension pillars or extending existing pillars as ramen frames, the axial force of the existing pillars can be transmitted to the ground stably through slope pillars and micro piles. After completion of the construction of the inclined pillar and the micro pile installed as a hypothesis, vertical downward extension construction using the inclined column and the foundation extension pillar as a ramen frame that transfers the axial load to the micro pile to transfer the axial load along the new pillar to the new foundation. It is about a method.

In recent years, there has been an increase in the number of vertically expanding underground structures in the lower part of the apartment and the remodeling process. Most of the remodeling of existing buildings mainly consists of horizontal expansion by planar expansion and vertical expansion of 1 ~ 3 floors. Underground vertical extension is undertaken to change the use of the basement floor or to secure underground parking lots in the case of apartment houses. Downgrading the basement below the building is often difficult to plan due to the safety of the existing building. Therefore, when the basement is expanded below the existing building, the surrounding area is strengthened in advance so that the existing foundation is not damaged. And passive way to vomit only around the foundation was sometimes used.

Therefore, it is currently used only to dig deeper than the foundation, such as pipe feet or underground passages, and there are few examples of thorough excavation of the lower foundation.

As a background technology of the present invention, there is a patent registration No. 1092758, "basic structure using a micropile and truss, and its construction method in the vicinity of the surrounding structure" (Patent Document 1). In the background art, a plurality of micro piles (MP) installed in a line in the ground as shown in FIG. A base plate truss (BT) installed above the micropile (MP); A column steel frame (CH) installed vertically on the base plate truss (BT); And, pillar concrete (CC) and foundation plate concrete (BC), which are placed on each of the pillar steel frame (CH) and the base plate truss (BT), wherein the foundation plate truss (BT) is the pillar steel frame ( The present invention proposes a basic structure using a micropile and a truss, wherein the loads transmitted from CH) are uniformly distributed to each of the plurality of micropiles MP. However, the background art is to leave the existing wall (OW) and the existing foundation (OB) as it is, and to construct a separate stretched pillars, walls and foundation to be completely separated from the transmission of the existing wall (OW) and existing foundation (OB) load It is not a way to dig the entire lower part of the existing foundation in such a way that the existing wall (OW) is to be left to form a separate structure. Therefore, the whole of the existing building could not be excavated, and by installing a separate structure to separate the load of the existing building and the load of the new structure there was a problem that the construction is difficult and economical.

Patent Registration No. 1092758 "Basic structure using micropile and truss and its construction method in the vicinity of surrounding structure"

The present invention is to solve the above problems, the basic structure using a micropile and an inclined pillar to effectively transfer the upper load transmitted through the pillars, etc. in the state of preserving the existing building to a plurality of micropile of the lower part effectively It is easy to vertically expand the existing building by providing the basement.In case of vertically expanding the basement under the existing building, it is possible to make full use of the existing foundation, but to excavate the entire lower part of the foundation rather than the passive method of digging only around the foundation. It can secure structural safety and economy. The existing foundation can be used as an extension pillar of an existing column, or an existing pillar can be extended to continue from the existing column to a new foundation through a new column. To provide a vertical downward extension construction method using a ramen frame with a slope column and a base extension column that are used as a new slab on the upper part of the beam to effectively resist earth pressure and to improve the stability of the substructure. There is this.

The present invention comprises the steps of (a) reinforcing the existing column and the upper beam surrounding the existing column; (b) installing a plurality of micropiles through existing foundation or underground beams; (c) installing the inclined column 31 to connect the existing column 10 and the upper end of the micropile 30; (d) excavating around the existing foundation; (e) removing the existing foundation such that only the base of the pillar below the existing pillar is present to form an extension pillar; (f) extending the existing pillar by wrapping and reinforcing the outside of the existing extension pillar with an iron plate; (g) installing steel beams on the extended extension columns; (h) excavating the ground; (i) installing bracing to interconnect the exposed micropile by excavating the ground; (j) repeating the steps (h) and (i) to the bottom on which the foundation is to be installed to complete the installation of excavation and bracing of the ground: (k) installing a new foundation in the lower part of the excavated ground, Repeating the installation of slabs and pouring concrete to complete the basement frame; (l) bracing and micropile removing step; to provide a vertical downward extension construction method using the inclined pillar and the foundation extension pillar to be delivered to the micropile as a ramen frame.

In addition, the steps of (e) (f) (g) to completely remove the existing foundation (e '), to extend to the bottom of the existing column to combine the extension to the iron plate to extend, and to cast high-strength concrete extension pillar It can be constructed by expanding the existing column (f '), and by changing to the step (g') to install a steel beam on the extension column.

In addition, a reinforcing member connecting the inclined column to form a lattice shape around the existing pillar may be additionally installed at a portion where the micropile upper part and the inclined column meet, and the deck plate at the top of the beam in the step (g) of installing the steel beam It is to provide a vertical downward extension construction method using the inclined column and the foundation extension column as a ramen frame to deliver micro piles that can effectively resist soil pressure by installing concrete.

Vertical downward extension construction method using the inclined column and the foundation extension pillar as a ramen frame to deliver the micropile of the present invention effectively stores the upper load transmitted through the pillar in the state of preserving the existing building to the plurality of micropiles at the bottom. By providing a basic structure using micro piles and inclined pillars that are transmitted evenly, it is easy to vertically expand existing buildings.In the case of vertical extension of the basement under existing buildings, the existing foundations can be used as extension pillars or existing columns It utilizes as a ramen frame so that the axial force of the existing column can be transmitted to the ground stably through the sloped column and the micro pile. Excellent in structural safety and economy And it is.

In addition, the existing foundation can be used as an extension pillar of an existing pillar or an existing pillar can be extended to be continued from the existing pillar to a new foundation through a new pillar. It can be used as a new slab on the upper part of the new beam to effectively resist earth pressure and improve the stability of the substructure.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention, Shall not be construed as limiting.
1 is a construction sequence diagram of a first embodiment of a vertical downward extension construction method using the inclined column and the foundation extension pillar to be delivered to the micro pile as a ramen frame;
2 is a construction sequence diagram of a second embodiment of the vertically downwardly enlarged construction method using a ramen frame and an inclined pillar and a base extension pillar to be transmitted to a micropile;
3a is a plan view of an existing building,
3b is a plan view of a state reinforcing an existing building according to the present invention;
Figure 4 is a detailed view of the existing column reinforcement portion according to the present invention,
5 is a perspective view showing an embodiment of the reinforcement of the micropile using bracing according to the present invention;
6 is a view showing an embodiment of a method for constructing a basic structure using a micropile and truss in the vicinity of the conventional surrounding structure of the present invention.

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the embodiments presented are illustrative for clarity of understanding and the present invention is not limited thereto.

Vertical downward extension construction method using the inclined pillar and the foundation extension pillar to be delivered to the micropile of the present invention as a ramen frame, the existing foundation 20 is punched to install the micropile 30 and install the hypothetical inclination pillar 31. The axial force of the existing column 10 is transmitted to the ground 50 through the inclined column 31 and the micro pile 30. In addition, when the foundation (NB) and the lower pillar (NC) construction is completed, the inclined pillar 31 and the micro pile 30 installed as a temporary structure are removed, and the axial load is lowered along the newly pillar NC. To (NB).

Hereinafter, the vertical downward extension construction method using the inclined pillar and the foundation extension pillar to be delivered to the micropile of the present invention according to a preferred embodiment as a ramen frame will be described in detail as follows.

1 is a construction sequence diagram of a first embodiment of a vertical downward extension construction method using the inclined column and the foundation extension pillar to be delivered to the micro pile as a ramen frame.

As shown in Figure 1a, first reinforces around the existing column 10 and the upper existing beam 12 coupled with the existing column 10 (a).

The reinforcement is to reinforce the steel plate 11 to secure the stability and to facilitate the coupling of the inclined pillar used as a temporary material.

Chipping the outer surface around the upper column coupled to the existing column 10 and the existing column 10 (chipping) and then wrap the outer surface of the existing column 10 with the iron plate 11 is completed by grouting. When reinforcing the existing column 10, the portion in contact with the upper beam is also reinforced with an iron plate. This is to reinforce the existing column 10 and install the inclined column 31 to each micropile 30 at the upper end of the reinforced existing column 10 to transfer the load transferred to the existing column 10 to the micropile 30 To deliver evenly.

As shown in FIG. 1B (a), after the reinforcement of the existing column 10, a plurality of micropiles 30 are installed through the existing foundation 20 or the underground beam (b).

This is to transmit the axial force acting on the existing pillar 30 to the bottom of the micropile 30.

The installation of the micropile 30 is perforated downward to penetrate the existing foundation 20 or underground beam, which is first radially symmetrical around the existing column 10 in the existing foundation 20 or underground beam. Drilling is carried out to form a plurality of drilling holes.

Perforation is the place to determine the location where the micropile 30 is installed, and a plurality of micropiles 30 must be infiltrated. In order to evenly transfer the load transmitted through the existing column 10 to the micropile 30. Perforated through the existing foundation 20 symmetrically about the existing column (10). In this embodiment, two pairs in four directions are formed around the existing column 10 to form a flat octagon, and the widths of the two micro piles forming the pair are the same as the width of the beam 40 to be installed later. It can be configured, of course, can additionally install a micropile 30 symmetrically to the outside. The installation number and installation form of the micropile 30 should reflect the site situation and allowable bearing capacity, and can be configured according to various embodiments, but the load transmitted through the existing column 10 is equally distributed to the micropile 30. It must have a symmetrical form to convey.

After drilling is completed to the design depth, the SLIME is removed with water or air and washed out of the drilling. After the drilling operation is finished, the micropile 30 is inserted after the casing is inserted into the drilling.

After inserting the micropile 30 grouting is performed, grouting is performed from the bottom of the perforation. In grouting, continuous work must be carried out to achieve a dense and homogeneous grouting, and it is performed until it overflows in the upper part of the perforation.

After grouting, the tofu is cleaned and the fixing plate is installed on the upper end of the micropile 30 to complete the installation of the micropile 30.

Micro pile is applied as the basic construction method or the up-lift force aerospace method in a narrow or restricted area where the existing pile foundation method is difficult to apply. In the micro pile, epoxy coated spiral bars transfer loads, and after rod insertion, the rod is integrated with cement grout and the rod is connected using a fixing nut or coupler. In order to withstand the fixed and construction loads of the upper part during the excavation of the basement, the pile capacity of the micro pile is secured to 100 tf.The micro pile's spiral bar is 65 mm and the casing is 200 mm. It is desirable to incorporate the bottom of the micropile into weathered rock in order to minimize it.

The building structure requires the transfer of force through which the load acting on the superstructure is transferred to the foundation through the lowermost column, and the load acting on each layer is transmitted to the pillars of each floor through the small beam and the large beam through the slab and the lowest floor. Power is transmitted through the pillars through the foundation and into the ground. The present invention is a construction method of bearing strength to directly transfer the force to the ground, in order to vertically extend the jungjung acting on the upper portion using the micropile 30 instead of the existing foundation 20 as a medium to direct bedrock do. The micropile effectively transfers the celebrations on the upper part to the ground through steel rods and internal mortar.

As shown in Figure 1b (b), there is then installed an inclined column 31 to connect the existing column 10 and the upper end of the micropile 30 (c).

The inclined column 31 serves as an axial force transmission structure that transfers the axial force acting on the existing column 10 to the ground by connecting the steel plate bonded to the beam around the existing column 10 and the micropile 30.

A plurality of micropile 30 is installed through the existing foundation 20 in the ground of the lowest layer, the number and dimensions can be adjusted according to the allowable bearing capacity. The inclined column 31 is to receive the load transmitted from the upper portion at one place of the upper portion to effectively and evenly distribute the upper portion of each of the plurality of micropiles 30.

The inclined column 31 may use a rectangular steel bar, H-shaped steel, I-shaped steel, etc., and the connection with the existing column 10 and the upper end of the micropile 30 may use a conventional joining method such as welding or bolting. . When the inclined pillar 31 is installed as described above, the load of the existing building is transferred from the existing foundation 20 to the plurality of micropiles 30 installed separately through the inclined pillar 31 and transferred to the ground. Underground structure will be able to build.

In addition, when the new foundation (NB) and the new pillar (NC) after the completion of the construction of the inclined pillar 31 installed as a hypothesis, the congratulations will be transmitted to the base bearing strength along the new pillar (NC). In order to directly transfer the axial of the upper to the micro pile 30, the inclined column 31, which is a load path, is coupled to the upper structure of the existing pillar 10 as closely as possible.

As shown in Figure 1b (c), when the inclined column 31 is installed, the inclined column to form a lattice shape around the existing column 10 at the portion where the micropile 30 and the inclined column 31 meet. Reinforcing members 32 connecting the 31 can be further installed.

The reinforcing member 32 may use a rectangular steel bar, H-shaped steel, I-shaped steel, and the like, and the coupling with the inclined pillar 31 may use various conventional bonding methods such as welding or bolting using a joint plate.

As shown in Figure 1c, after the installation of the inclined column 31 in order to smoothly cut the existing foundation 20 to remove the bottom and ground beams in the center of the basement layer around the existing foundation 20 and about 500 ~ 1,000m Vomit (d).

As shown in FIG. 1C (b), only the base of the lower part of the existing foundation and the existing foundation 20 are all disposed so that only the lower base of the lower pillar of the existing pillar 10 is present to form the extension pillar 20a. Remove (e).

The cutting area of the existing foundation 20 is removed to maintain the same cross section as the existing pillar 10 so as to be an extension pillar extending the existing pillar 10.

As shown in Figure 1c (b), and then wrapped around the outer side of the extension pillar (20a) that is retained by the iron plate (21a) to reinforce (f).

The outer surface of the extension pillar 20a is reinforced with the iron plate 21a, and the gap between the extension pillar 20a and the iron plate 21a is filled with epoxy or the like. As such, the extension pillars 20a may be reinforced to facilitate coupling of the steel beams 40 for slab formation.

As shown in FIG. 1D (a), the steel beam 40 is then installed in the extended extension pillar 20a (g).

It is a ramen frame consisting of an extension pillar 20a and a steel beam 40 is formed to resist earth pressure, to ensure the stability of the frame, using an extension pillar 20a as an extension of the existing column 10 beam pillar frame This is to configure the system. Steel beam 40 is coupled to the web by using a joint plate 22 or the like on the iron plate 21a of the outer surface of the extension pillar (20a).

In the step (g) of installing the steel beam 40, the deck plate 41 is installed on the upper portion of the beam 40, and the step of pouring concrete 42 is added, so that it can be additionally resistant to earth pressure. For example, slabs may be cast for top-down applications.

Then, as shown in Figure 1d (b) and Figure 1d (c), to excavate the ground 50 to form an underground frame (h), and the ground is excavated to expose the micropile 30 The bracing 33 is installed to interconnect (i).

Figure 3a is a plan view of an existing building, Figure 3b is a plan view of the state reinforcing the existing building according to the present invention.

Then, as shown in Figure 1e, repeating the steps (h) and (i) to the bottom on which the foundation is to be installed to complete the pit soil and bracing installation of the ground (j) to the trench work for forming the underground frame To complete.

As shown in Figure 1f (a), after completing the excavation work as described above, the new foundation (NB) is installed in the lower part of the excavated ground, the new pillar (NC) and the slab is repeated to install the concrete (K) to complete the basement frame by pouring

The new foundation (NB) replaces the existing foundation 20. The new pillar NC is continuously connected to the existing pillar 10 so that the load transmitted to the existing pillar 10 is transferred to the new pillar NC and the new foundation ( NB).

As shown in Figure 1f (b), after completing the underground frame by installing the new pillar (NC) and the new foundation (NB) as described above to remove the bracing 33 and the micropile 30 to increase the vertical expansion Complete (l).

Base reinforcement at the lowest level and placing foundation to complete new foundation (NB). Afterwards, the remaining residual process is repeated with the existing structure by installing new pillars (NC), beams, slabs and placing concrete in the same way as the existing frame construction.

When the construction is completed, since the load transmitted to the existing column 10 is transferred to the new foundation (NB), the micropile 30 no longer serves as a load transfer from the existing column 10, and thus is removed. The repair is completed by repairing a peripheral opening section of the pycropile 30.

Figure 2 is a construction sequence diagram of a second embodiment of the vertical downward extension construction method using the inclined column and the foundation extension pillar to be delivered to the micro pile as a ramen frame.

Almost the same as the construction method of the first embodiment described above, in the first embodiment, only the extension pillar 20a is left on the existing foundation 20 (e), and the outside of the extension pillar 20a is plated 21a. The steel frame 40 was installed in the extension pillar 20a which was retained by reinforcing and reinforcing (f) and removing the existing foundation 20 (g), but the remaining steps were the same in the second embodiment, but the existing foundation ( 20) completely removed (e '), extending to the bottom of the existing pillar 10 to extend the existing plate with a steel plate (21b) to combine, and by pouring high-strength concrete to produce an extension column (20b) to the existing column ( 10) is expanded (f '), the difference in the step (g') of installing the steel beam 40 to the extension pillar (20b).

As shown in Figure 2a, first reinforces around the existing column 10 and the upper existing beam 12 coupled with the existing column 10 (a).

As shown in Figure 2b (a), after the reinforcement of the existing column 10 to install a plurality of micropiles 30 through the existing foundation 20 or underground beam (b).

As shown in Figure 2b (b), and then install the inclined column 31 to the upper end of the micropile 30 introduced from the existing column (10) (c).

As shown in Figure 2b (c), when the inclined column 31 is installed, the inclined column to form a lattice shape around the existing pillar 10 at the site where the micropile 30 and the inclined column 31 meet. Reinforcing members 32 connecting the 31 can be further installed.

As shown in Figure 2c, after the installation of the inclined column 31 in order to smoothly cut the existing foundation 20 to remove the bottom and underground beams in the center of the basement layer around the existing foundation 20 and about 500 ~ 1,000m Vomit (d).

As shown in Figure 2c (b), to remove all the existing foundation 20 under the existing column 10 (e ').

As shown in Figure 2c (b), after extending to the lower plate of the existing pillar 10 to extend the existing pole to the plate (21b), coupled to the high-strength concrete in the iron plate (21b) to extend the extension pillar (20b) ) To expand the existing column (10).

The iron plate 21b extends by connecting to the lower part of the iron plate 11 which reinforces the outside of the existing column 10. The extension of the iron plate 21b is to maintain the same cross-section as the existing column 10 to extend the existing column (10).

Thereafter, high-strength concrete is poured into the inside of the iron plate 21b to manufacture the extension pillar 20b. As described above, the extension pillar 20b is configured to extend the existing pillar 10 in the lower portion of the existing pillar 10 by the production of the extension pillar 20b.

In this way, it is possible to facilitate the coupling of the steel beams 40 for slab formation by reinforcing the pillar extension pillar 20b.

As shown in Figure 2d (a), the steel beam 40 is then installed in the extended extension column (20b) (g ').

In the step (g ') of installing the steel beam 40, the deck plate 41 is installed on the upper portion of the beam 40, and the step of placing the concrete 42 is added, so as to further resist the earth pressure It is also possible to pour a slab for top-down application.

Then, as shown in Figure 2d (b) and 2d (c), to excavate the ground (50) to form a basement frame in the lower (h), the ground is excavated to expose the micropile 30 The bracing 33 is installed to interconnect (i).

Then, as shown in Figure 2e, repeating the steps (h) and (i) to the bottom on which the foundation is to be installed to complete the pit excavation and bracing installation of the ground (j) to the trench work for forming the underground frame To complete.

As shown in Figure 2f (a), after completing the excavation work as described above, the new foundation (NB) is installed in the lower part of the excavated ground, the new pillar (NC) and the slab is repeated to install the concrete (K) to complete the basement frame by pouring

The new foundation (NB) replaces the existing foundation 20. The new pillar NC is continuously connected to the existing pillar 10 so that the load transmitted to the existing pillar 10 is transferred to the new pillar NC and the new foundation ( NB).

As shown in Figure 2f (b), after completing the underground frame by installing the new pillar (NC) and the new foundation (NB) as described above, the bracing 33 and the micropile 30 are removed to increase the vertical extension. Complete (l).

Figure 3a is a plan view of an existing building, Figure 3b is a plan view of the state reinforcing the existing building according to the present invention.

Existing beams and existing foundations 20 are removed from the top view of the existing FIG. 3a, and reinforcement in the state shown in FIG. 3b.

Figure 3b is a plan view of the state reinforcing the existing building according to the present invention, Figure 4 is a detailed view of the existing column reinforcement according to the present invention.

As shown in FIGS. 3B and 4, the thrust (horizontal force) that may be generated at the junction between the inclined column 31 and the micropile 30 is determined by the points of the inclined column 31 and the micropile 30. To connect the grid beam, that is, well sperm form to connect the inclined column 31 to increase the stability.

5 is a view showing an embodiment of the reinforcement of the micropile using bracing according to the present invention. As shown in FIG. 5, the ground 50 is excavated to form an underground framework at the bottom of the first and second embodiments (h), and the ground is excavated to interconnect the exposed micropiles 30. When the bracing 33 is installed (i), the bracing 33 is formed at the same distance from the center of the existing pillar 10 because the micropile 30 is radially formed around the existing pillar 10. The micropiles 30 are installed to interconnect with each other. The installation of the bracing 33 can be installed in diagonal lines and straight lines, and ensures stability of the installed micropile 30 by being symmetrical about the existing pillar 10 at the time of installation.

If the pit is made too deep for the basement extension, the length of the exposed micropile 30 becomes long, so that the structure may be unstable and there may be a risk of buckling. Bracing 33 is installed to connect. Since the micropile 30 is an elongated member and the gulting equipment may damage the temporary pillar, the brace 33 should be less than 1.5 m and the bracing 33 within the vertical interval of 1.0 m to prevent buckling. It is preferable to combine the micropile 30. In addition, in order to ensure the safety of the entire building and minimize local deformation during construction, it is desirable to separate the tools from deep to low, and to be constructed from the inside out.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. will be. The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

10: existing pillar
11, 21: iron plate
12: existing beam
20: Existing Foundation
20a, 20b: extension pillar
30: microfile
31: slope pillar
32: reinforcing member
33: bracing
40: steel beam
41: Deck Plate
42: concrete
50: ground
NC: New Column
NB: New Foundation

Claims (6)

(a) reinforcing the perimeter of the upper beam coupled with the existing column 10 and the existing column 10;
(b) installing a plurality of micropiles 30 through the existing foundation 20 or underground beams;
(c) installing the inclined column 31 to connect the existing column 10 and the upper end of the micropile 30;
(d) excavating around the existing foundation 20;
(e) removing the existing foundation 20 so that only the pillar foundation under the existing pillar 10 is present to form the extension pillar 20a;
(f) extending the existing pillars 10 by wrapping and reinforcing the outside of the extension pillars 20a with the iron plate 21a;
(g) installing the steel beams 40 on the extension pillars 20a;
(h) excavating the ground 50;
(i) installing the bracing 33 to pit the ground 50 to interconnect the exposed micropile 30;
(j) repeating the steps (h) and (i) to the bottom on which the foundation is to be installed to complete the installation of the soil pile and bracing:
(k) installing a new foundation (NB) in the lower part of the excavated ground, repeating the installation of the new columns (NC) and slabs, and pouring concrete to complete the underground frame;
(l) bracing (33) and the micropile (30) removing step; vertical downward extension construction method using the inclined column and the base extension pillar to be delivered to the micropile, characterized in that it comprises a ramen frame. The method of claim 1,
In the step (c) of installing the inclined column 31, a reinforcement for connecting the inclined column 31 to form a lattice shape around the existing column 10 at a portion where the upper portion of the micropile 30 and the inclined column 31 meet. Vertical downward extension construction method using the inclined pillar and the foundation extension pillar to be transmitted to the micropile, characterized in that the additional installation member 32 as a ramen frame. 3. The method according to claim 1 or 2,
In the step (g) of installing the steel beam 40, the deck plate 41 is installed on the upper portion of the beam 40, and the step of pouring concrete 42 is inclined to transfer to the micropile Vertical downward extension construction method using column and foundation extension column as ramen frame. (a) reinforcing the perimeter of the upper beam coupled with the existing column 10 and the existing column 10;
(b) installing a plurality of micropiles 30 through the existing foundation 20 or underground beams;
(c) installing the inclined column 31 to connect the existing column 10 and the upper end of the micropile 30;
(d) excavating around the existing foundation 20;
(e ') removing the existing foundation 20;
(f ') extends and combines with the iron plate 21b to extend the existing column to the lower part of the existing column 10, and casts high-strength concrete inside the iron plate 21b to produce the extension column 20b to produce the existing column 10 E);
(g) installing the steel beams 40 on the extension pillars 20b;
(h) excavating the ground 50;
(i) installing the bracing 33 to pit the ground 50 to interconnect the exposed micropile 30;
(j) repeating the steps (h) and (i) to the bottom on which the foundation is to be installed to complete the installation of the soil pile and bracing:
(k) installing a new foundation (NB) in the lower part of the excavated ground, repeating the installation of the new columns (NC) and slabs, and pouring concrete to complete the underground frame;
(l) bracing (33) and the micropile (30) removing step; vertical downward extension construction method using the inclined column and the base extension pillar to be delivered to the micropile, characterized in that it comprises a ramen frame. The method of claim 4, wherein
In the step (c) of installing the inclined column 31, a reinforcement for connecting the inclined column 31 to form a lattice shape around the existing column 10 at a portion where the upper portion of the micropile 30 and the inclined column 31 meet. Vertical downward extension construction method using the inclined pillar and the foundation extension pillar to be transmitted to the micropile, characterized in that the additional installation member 32 as a ramen frame. The method according to claim 4 or 5,
In the step (g) of installing the steel beam 40, the deck plate 41 is installed on the upper portion of the beam 40, and the step of pouring concrete 42 is inclined to transfer to the micropile Vertical downward extension construction method using column and foundation extension column as ramen frame.

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