KR101641293B1

KR101641293B1 - Double line retaining wall self-reliance composite wall construction method for reinforcement pile wall

Info

Publication number: KR101641293B1
Application number: KR1020150092420A
Authority: KR
Inventors: 김효숙; 김인철
Original assignee: (주)대안소일텍
Priority date: 2015-06-29
Filing date: 2015-06-29
Publication date: 2016-07-20

Abstract

The present invention is characterized in that two rows of main heating walls are formed on a soft ground having a deep depth of support layer such as coastal dredging landfill and the like and a middle reinforcing partition wall is formed between these main heating walls to form a synthetic soilless wall, The present invention provides a method for constructing a two-row self-supporting double walled retaining wall which is integrated with a support beam and bracing at the top to support the earth pressure.
According to a preferred embodiment of the present invention, (a) a plurality of SCWs (Soil), in which an H file is composed of a core material after the base line CL is centered at the back and the excavation surface, Cement Wall) or CIP (Cast In Place Pile); (b) a plurality of SCW (Soil Cement Wall) or CIP (Cast In Place Pile), each of which consists of an H-pile core material so as to be parallel to the excavation surface at a predetermined distance from the first rear heat transfer wall, Constructing a second electrothermal heating wall formed so as to be adjacent to each other; (c) jet grouting at regular intervals in a direction orthogonal to the main heat direction between the first and second electrothermal heating walls parallel to each other, or by forming a main heating wall with non-surrounding cement to construct an intermediate reinforcing partition ; (d) installing a wrist bracket at an upper end of the H file, respectively, mounting the wrist strap to the wrist bracket, and then joining the support beams to each other between the wrist straps; And (e) excavating the excavation surface to a trench construction plan.

Description

TECHNICAL FIELD [0001] The present invention relates to a double wall retaining wall self-reliance composite wall construction method for reinforcement pile wall,

The present invention relates to a method for constructing a two-row self-sustaining composite wall with a two-row heat-retaining structure, and more particularly, to a method for forming two rows of main heat walls on a soft ground having a deep depth and a high earth pressure, The present invention relates to a method of constructing a self-sustaining double walled double-walled self-sustaining composite wall for supporting the earth pressure by integrally forming a composite soilless wall with a non-surrounding type intermediate reinforcing partition wall and a supporting beam and bracing at the top.

When the underground excavation works on the soft ground such as the coast dredged landfill, the depth of the support layer is deep and the earth pressure is large, so there is a considerable difficulty in selecting a suitable earth retaining method.

In general, the sheet pile or SCW (Soil Cement Wall) retaining wall is supported by earth anchor or supported by strut support. In order to stabilize the lower penetration part, It is usual to improve the ground by grouting on the back of the wall. However, it is difficult to obtain satisfactory settlement force when the back ground is soft ground, and it is difficult to secure the bearing capacity of the middle pile when the length of the ground support by strut is long. It was difficult to construct the structure, and there was a problem in applicability.

As a background of the present invention, Patent No. 0966573 entitled " Two-row Thumb Pile Retaining Method Using Strut "(Patent Document 1) is known. In the above background art, as shown in FIG. 4, a "first row of thumb thumb piles " is formed along a boundary line of an excavation region and a first row of thumb thumb piles, Wherein the first heat thumb pile and the second heat thumb pile are connected to each other by a connecting member so as to integrally act as a first heat thumb pile and a second heat thumb pile, The method comprising the steps of: forming a retaining structure by providing a retaining member between piles to form a retaining structure; and forming a strut on a corner of the retaining structure, wherein the forming of the retaining structure comprises: Wherein the step of forming the inclined surface further comprises the step of forming an inclined surface in which the first row of thumb thumb piles and the second row of thumb thumb piles are excavated so as to form an inclined surface facing inward, A second heat retaining structure for excavating the area between the second row thumb piles and the excavation area to a first design depth and installing a second heat retaining member between the second heat thumb piles to form a second heat retaining structure, A structure is formed in which a region between the first heat thumb pile and the second heat thumb pile is inclined inward to a second design depth forming a stable slope, And a step of excavating up to the secondary design depth (H2). &Quot; The present invention proposes a two-row thumb pile retention method using a strut. "

However, in the background art, it is difficult to obtain satisfactory fixing force when the back ground is formed of two rows and struts are used, and when the back ground is soft, it is difficult to secure satisfactory fixing force. There was a difficult problem.

Patent No. 0966573 entitled "Two-row Thumb Pile Retaining Method Using Strut"

Accordingly, the present invention forms two rows of main heat walls on a soft ground having a deep depth of support layer such as a coastal dredged landfill and the like, and forms an intermediate reinforcing partition wall between the main heat walls to form a synthetic soilless wall The present invention is directed to a method of constructing a self-supporting double-walled self-sustaining double-walled composite wall, which is integrated with a support beam and bracing at the top to support the earth pressure.

According to a preferred embodiment of the present invention,

(a) a plurality of SCW (Soil Cement Wall) or CIP (Cast In Place) structures in which the H file is formed by core material after the base line (CL) A first rear heat transfer wall connected to the first heat transfer wall by piles;

(b) a plurality of SCW (Soil Cement Wall) or CIP (Cast In Place Pile), each of which consists of an H-pile core material so as to be parallel to the excavation surface at a predetermined distance from the first rear heat transfer wall, Installing a second heat transfer heat generating wall formed to be adjacent to the first heat transfer heat generating wall;

(c) jet grouting at regular intervals in a direction orthogonal to the main heat direction between the first and second electrothermal heating walls parallel to each other, or by forming a main heating wall with non-surrounding cement to construct an intermediate reinforcing partition ;

(d) installing a wrist bracket at an upper end of the H file, respectively, mounting the wrist strap to the wrist bracket, and then joining the support beams to each other between the wrist straps; And

(e) excavating the excavation surface to a digging plan height.

Further, in the step (d)

The reinforcement bracing is positioned between neighboring support beams, and the ends and the intersections of the reinforcement bracing are bolted together to be connected to the neighboring support beams in an X shape.

Further, in the step (d)

And the reinforcing bracing is connected to the neighboring support beams so that the reinforcement bracing is connected to the neighboring support beams in a rhombic manner.

Further, in the step (e)

Further comprising a step of forming a main heating wall by jet grouting in a direction orthogonal to the second electrothermal heat generating wall in addition to the second electrothermal heat generating wall in addition to the surface to be erected after excavation to further construct the passive earth pressure portion reinforcing partition .

According to the method for constructing the self-sustaining composite wall with two columns heat-retaining walls of the present invention, the first and second heat-transfer columns are formed by SCW (Soil Cement Wall) or CIP (Cast In Place Pile) Wall is installed and a middle reinforced partition wall is installed by jet grouting or SCW method in the middle, and the upper part of the first rear heat main wall and the second electric heat main wall are supported by a supporting beam and a reinforcing bracing It is possible to secure the structural safety by connecting to integrate them to resist the earth pressure, and it is not necessary to install the strut and earth anchor during the construction, and the air is shortened.

In addition, when there is a limitation on the installation widths of the first and second heat-transfer main heat-generating walls, a passive earth pressure portion reinforcing partition wall may be additionally provided to secure an increase in the manual earth pressure.

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.
FIG. 1A is a perspective view of a heat-strengthened two-seater self-supporting two-leg wall constructed according to the present invention. FIG.
FIG. 1B is a plan view of FIG. 1A. FIG.
2 to 6 are flowcharts showing a construction process according to a method of constructing a two-row self-standing double walled reinforced synthetic wall according to the present invention,
2 is a construction diagram of the first rear heat transfer wall,
3 is a construction diagram of the second rear heat transfer wall,
FIG. 4A is a construction state in which a reinforcing partition is provided between the first rear heat fixing wall and the second rear heating main wall,
FIG. 4B is a plan view of FIG. 4A,
5A is an installation state diagram of a wale band, a support beam, and a bracing for an integrated behavior of the main heat wall,
FIG. 5B is a plan view of FIG. 5A,
FIG. 5C is a perspective view of FIG. 5A,
Figure 5d is a top plan view of another form of bracing,
6 is a state in which a passive earth pressure portion reinforcing partition is additionally installed.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.

As shown in FIG. 1A and FIG. 1B, the two-row soil-retaining self-standing composite wall 1 according to the present invention is reinforced by a so-called SCW (Soil Cement Wall) or CIP (Cast In Place Pile) The first and second electrothermal heating walls 10 and 20 are provided between the first and second electrothermal heating walls 10 and 20 at regular intervals The intermediate reinforcing partition wall 30 is provided by jet grouting or SCW method and is constructed with one composite wall. The upper ends of the first and second electrothermal secondary heat generating walls 10 and 20 are connected to each other by the supporting beams 15 and the reinforcing bracings 40 or 40 so as to resist the earth pressure, . When there is a restriction on the installation width of the first rear heat exchange wall 10 and the second heat transfer heat introduction wall 20, the passive earth pressure portion reinforcing partition wall 50 connected to the second heat transfer heat generating wall 20 is installed, The present invention has the effect of securing an increase

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the following examples.

FIGS. 2 to 5 are flowcharts showing the construction method of the heat-strengthened two-row earth retaining self-standing synthetic wall according to the present invention in the order of construction.

First, as shown in FIG. 2, the first rear heat transfer wall 10 is constructed.

This designation is made with the base line CL as the center and the excavation surface as the center of the base line CL at which the two-row earth retaining wall 1 is to be installed and a plurality of SCW (Soil Cement Wall) or CIP Cast In Place Pile) and are connected to each other.

The first rear heat transfer wall 10 is formed of a core material at regular intervals in the wall longitudinal direction. The core material can be various kinds such as H-shaped steel, steel pipe, sheet pile, and special shaped steel pipe, but it is preferable to use H-shaped steel having large moment of inertia.

S.C.W (Soil Cement Wall) is a method to be used in order to form secondary wall and soil wall in clay soil and sandy soil by using Soil Cement continuous wall method. The Soil Cement Method is a method in which the EARTH AUGER MACHINE is drilled with WING BIT to treat the soil in situ as aggregate and the cement solution with W / C ratio exceeding 100% The wall is formed by mixing and mixing with the gypsum at the present position, and a continuous wall is formed by lapping a part of the end to form an exponential wall. In addition, a core material (stress material) is inserted into the wall of the wall to form a wall.

The CIP (Cast In Place Pile) is a type of drilling punch with a predetermined drilling diameter, followed by inserting H-piles and reinforcing bars, and pouring concrete to form a toe wall.

Then, the second electrothermal heating wall 20 is constructed as shown in FIG.

The main heat wall 20 includes a plurality of SCW (Soil Cement Wall) or CIP (CIS) walls 21, which are spaced from the excavation surface by a predetermined distance from the first rear heat insulating wall 10, Cast In Place Pile). The second heat transfer heat generating wall 20 is installed so as to be parallel to the first heat transfer heat generating wall 10.

Next, as shown in FIGS. 4A and 4B, jet grouting is performed at regular intervals between the first and second heat transfer heat generating walls 10 and 20 parallel to each other, or a main heat wall is formed with the non-surrounding cement SCW The intermediate reinforcing partition 30 is constructed.

At this time, the intermediate reinforcing partition 30 is formed in a direction orthogonal to the main heat direction of the first rear heat generating wall 10 and the second heat transfer heat generating wall 20.

Jet Grouting (Jet Grouting) is a method to improve soft ground. It is a method to improve ground on soft ground by injecting ultra high-pressure jet on soft ground. It is used to cut and agitate ground using ultra high pressure JET Fill the gap with grout material and consolidate it.

The noiseless soil cement (SCW) omits the construction of the core material in the SCW method described above.

Then, as shown in Fig. 5, construction is carried out to connect the upper ends of the two-row earth retaining wall self-standing synthesis wall 1. [ 5A to 5C, wale brackets 13 and 23 are installed at the upper end of the H files 11 and 21 and wale straps 14 and 24 are mounted on the wale brackets 13 and 23, And then the supporting beams 15 are bonded between the wales 14 and 24 on both sides.

At this time, a backfill material 26 is provided between the wales 14 and 24 and the H files 11 and 21.

Meanwhile, in this step, a step of reinforcing the twist through the reinforcing bracing 40 may be further performed. This can be done in two forms.

In the first embodiment, as shown in FIGS. 5B and 5C, the reinforcing brace 40 is installed in an X-shape. This is accomplished by placing the reinforcing bracing 40 between the adjacent support beams 15 and 15 and then connecting the ends and intersections of the reinforcing bracing 40 to the adjacent support beams 15 and 15 by bolting .

In the second embodiment, as shown in FIG. 5D, the reinforcement bracings 40 are connected in a rhombic shape. This reinforcing bracing 40 is installed by bonding one end to the adjacent supporting beam 15 and the other end to the wales 14 and 24.

When the reinforcing bracings 40 are arranged in the X-shape or the rhombic shape, not only the distortion received by the support beams 15 is distributed through the reinforcing bracing 40 but also the reinforcing bracing 40 is prevented from being twisted It is possible to more effectively prevent the twisting of the two-row earth retaining walls 1 and the behavior of the integrated wall.

Then, as shown in Fig. 6, the excavation surface is excavated to the trench digging plan height.

At the time of excavation, the earth pressure increases according to the depth of excavation, but the passive earth pressure is applied by the already installed intermediate reinforcing partition 30, so that excavation to a relatively deep depth becomes possible.

According to the present method, since the intermediate reinforcing partition 30 is provided, it is not necessary to provide the earth anchor and the strut bracket during the construction, and the air can be shortened.

Meanwhile, in this method, after the excavation, the passive earth pressure portion reinforcing partition 50 can be additionally installed as shown in FIGS.

The passive earth pressure part reinforcing partition wall 50 is connected to the second heat transfer heat generating wall 20 in addition to the surface to be ground after excavation to form a main heat wall by jet grouting. At this time, the passive earth pressure portion reinforcing partition 50 is disposed in a direction orthogonal to the second electrothermal heat generating wall 20.

This is the case where there is a limitation on the width of the two-row retaining wall, and the passive earth pressure portion reinforcing partition 50 is constructed to increase the passive earth pressure.

The method of constructing the heat-strengthened two-row earth retaining self-standing composite wall according to the present invention as described above is performed by supporting the earth pressure only by the first rear heat incoming wall 10, the second heat transfer heat introducing wall 20 and the intermediate reinforcing partition 30 It is possible to construct the self-supporting synthetic wall without using the brace and the earth anchor, which is very effective in securing economy and shortening the air.

In addition, a bracing structure for preventing warpage and acting as an integral part is provided on the upper part of the retaining wall, thereby securing the work stability and ensuring the workability and quality of the construction work.

In addition, when there is a limitation on the width of the two-row retaining wall, the passive earth pressure reinforcing partition 50 is installed, thereby increasing the manual earth pressure.

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: first post heat preheating wall
13,23: Wrist bracket
14,24: Wale
15: Support beam
20: second heat-induced heat-generating wall
30: intermediate reinforcing partition
40: reinforcement bracing
50: Passive earth pressure part reinforcing partition

Claims

(a) a plurality of SCW (Soil Cement Wall) or CIP (CIP) structures in which the H file 11 is formed as a core material after the base line CL is centered at the base and the base line Cast In Place Pile) to form a first rear heat transfer wall (10);
(b) a plurality of SCW (Soil Cement Wall) or CIP (Cast) walls each having an H file 21 formed of a core material so as to be spaced apart from and parallel to the excavation surface by a predetermined distance from the excavation surface, The second heat transfer heat generating walls 20 are formed to be in contact with each other.
(c) jet grouting at regular intervals in a direction orthogonal to the main heat direction between the first and second heat-transfer main heat-generating walls 10 and 20 parallel to each other, or by forming a main heat- Constructing the partition (30);
(d) Wale brackets 13 and 23 are installed at the upper end of the H files 11 and 21, respectively. After the wale straps 14 and 24 are mounted on the wale brackets 13 and 23, (14) and (24), respectively; And
(e) The excavation surface is connected to the second electrothermal heating main wall 20 in addition to the surface to be quarried after the excavation to the earthquake disposal plan height, and the main heating wall by jet grouting in the direction orthogonal to the second electrothermal secondary heating wall 20 And further constructing the passive earth pressure portion reinforcing partition wall 50. The method of claim 1,

The method according to claim 1,
In the step (d)
After the reinforcing bracing 40 is positioned between the adjacent supporting beams 15 and 15, the ends and intersections of the reinforcing bracing 40 are bolted together to form X-shaped connections to the adjacent supporting beams 15 and 15 Wherein the reinforcing member is installed on the inner wall of the reinforcing member.

The method according to claim 1,
In the step (d)
The reinforcement bracing 40 is joined to the adjacent support beams 15 and 15 at one end and to the wales 14 and 24 at the other end so that the reinforcement bracing 40 is connected to the adjacent support beams 15 and 15 in a diamond- Wherein the reinforced composite wall is formed of a heat-resistant synthetic resin.

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