KR102009077B1 - Earth retaining wall construction method using castinplace concrete pile of impermeable peristyle type - Google Patents

Abstract

The present invention provides a construction method of the earth wall using the order-type column-type cast-in-placement piles to ensure the order is completed by placing the hollows for the order in the primary site piles, including the hollows for the secondary site piles to provide.
According to a preferred embodiment of the present invention, a method of constructing a retaining wall using an ordered column-type cast-in-placement pile includes: (a) incorporating a primary casing having a predetermined diameter at a predetermined interval in the ground on which the retaining wall is to be constructed; Constructing a primary drilling hole; (b) lifting a rebar net or H beam to which a pair of superimposed boundary guide members are attached, respectively, and introducing the reinforcing bar into the primary drilling hole; (c) placing concrete in the primary perforation hole to form a hollow portion for the non-pouring concrete on the outside of the guide member for overlapping boundary, and then drawing the primary casing; (d) constructing secondary drilling holes by incorporating secondary casings having the same diameter so as to allow the hollow portions for order formed by the overlapping boundary guide members existing between neighboring primary drilling holes to overlap; Wow; (e) lifting the reinforcing bar or H beam which is not provided with the guide member for overlapping boundary, and introducing the reinforcing hole into the secondary drilling hole; (f) after pouring concrete into the secondary perforation hole including the hollow portion for drawing, drawing a secondary casing; characterized in that the construction including.

Description

Earth retaining wall construction method using castinplace concrete pile of impermeable peristyle type}

The present invention relates to a construction method of the retaining wall, in particular, after placing the hollow portion for the primary site piles and the secondary site piles including the hollow portion for the degree of order to complete the order by placing concrete It relates to a construction method of the retaining wall using the pouring pile.

As the construction method for the construction of the underground structure, it is a temporary structure installed to prevent the collapse of the excavation surface or the inflow of soil by resisting earth pressure and water pressure as a means of securing the working space for the installation of underground structures, and the site conditions and surroundings (land conditions, groundwater level distribution, underground) Considering buried items, adjacent facilities, etc.), select and apply a method that can satisfy stability, constructability, and economic feasibility.

As the clam wall, construction methods such as thumb pile + earth plate, sheet pile wall, cast-in-place concrete pile (C.I.P) casting type wall, soil cement wall (S.C.W), and underground continuous wall (Slurry Wall) are known.

The CIP method is a method of inserting H-pile and reinforcing bars and placing concrete walls to form a retaining wall after individual drilling with a predetermined diameter by using T4 equipment, and minimizing damage to adjacent structures as a rigid wall. On the other hand, there is a weak point in economics because the vertical depth is poor, the joints between the balls and the joints are weak at deep depths, and a separate order method for the order must be applied. For example, the advanced process using double pipe rods is combined to form an induction space in the target ground by the post process to improve the ground by using the chemical liquid or the chemical and ultra fine cement mixture with gel time close to purity. The order method is added separately. Therefore, there is a need for a solution that can solve these disadvantages of the C.I.P process.

As a background technology of the present invention, Korean Patent Registration No. 10-0927186 has been proposed, 'a continuous wall construction method for the wall and the order'. This is to install the casing guide after drilling the ground in order to drill the pile hole in the ground where the pile will be located, insert the casing into the casing guide and drill it to a certain depth using this casing, After discharging, maintaining the linear shape while injecting the pre-fabricated pile inside the casing, drawing the casing, and drilling the pile between the pile and the pile to form a connection hole, and then injecting the ready-mixed concrete or mortar into the connecting hole. It is characterized by building one continuous wall structure by connecting the liver and dismantling the casing guide. However, this background art requires the post-processing work of drilling the connection hole after constructing the pile linear work and placing mortar on it.

As another technology that is the background of the present invention, Korean Patent Registration No. 10-1590032 has been proposed, 'stage heating wall using underground embedded pile and structure construction method using the same'. This allows the construction of walls while connecting piles in the longitudinal direction using piles, but the formation of bending reinforcement parts on piles for effective earth pressure support, and the construction of various structures using pile walls using such piles. However, the background art is a connection bracket including an X-shaped fabricated to form a closed space in contact with the landfill pile on the surface of the trench after the partial destruction of the ground; And the construction of a pile connecting material including a grouting material which is injected into the closed space and a grouting material for integrating the connecting bracket, the underground buying file and the underground buying file, increases the number of components for the order and increases the number of works. .

As a background technology of the present invention, Korean Patent Registration No. 10-0752397 has been proposed, 'underground order wall construction method and auxiliary casing used therein'. The auxiliary casing installation step of installing a plurality of auxiliary casings formed on both sides of the groove portion for coupling with the main casing on the ground, the auxiliary casing is installed at intervals between the plurality of auxiliary casing to be installed; A main casing installing step of drilling a ground between the plurality of auxiliary casings installed by the auxiliary casing installing step to install a plurality of the main casings; A step of installing a back muscle in the plurality of auxiliary casings and the main casing; A concrete placing step of placing concrete in the plurality of auxiliary casings and the main casing; A casing removing step of removing the auxiliary casing and the main casing before curing of the concrete poured by the concrete pouring step; We present the method of construction of underground containment wall. However, this background art has a groove formed in the auxiliary casing, so that it is difficult to intrude rotation into the ground. To solve this problem, the main casing is temporarily installed in the ground to be drilled, and then the auxiliary casing is inserted into the main casing. Again, cumbersome work is needed to remove the main casing. In addition, there is a need for an additional work process of installing a spacer to position the auxiliary casing in the center of the main casing, which increases the construction man-hour.

Korea Patent Registration No. 10-0927186 Korean Patent Registration No. 10-1590032 Korea Patent Registration No. 10-0752397

The present invention provides a construction method of the earth wall using the order-type column-type cast-in-placement piles to ensure the order is completed by placing the hollows for the order in the primary site piles, including the hollows for the secondary site piles The purpose is to provide.

According to a preferred embodiment of the present invention, a method of constructing a retaining wall using an ordered column-type cast-in-placement pile includes: (a) incorporating a primary casing having a predetermined diameter at a predetermined interval in the ground on which the retaining wall is to be constructed; Constructing a primary drilling hole; (b) lifting a rebar net or H beam to which a pair of superimposed boundary guide members are attached, respectively, and introducing the reinforcing bar into the primary drilling hole; (c) placing concrete in the primary perforation hole to form a hollow portion for the non-pouring concrete on the outside of the guide member for overlapping boundary, and then drawing the primary casing; (d) constructing secondary drilling holes by incorporating secondary casings having the same diameter so as to allow the hollow portions for order formed by the overlapping boundary guide members existing between neighboring primary drilling holes to overlap; Wow; (e) lifting the reinforcing bar or H beam which is not provided with the guide member for overlapping boundary, and introducing the reinforcing hole into the secondary drilling hole; (f) after pouring concrete into the secondary perforation hole including the hollow portion for drawing, drawing a secondary casing; characterized in that the construction including.

In addition, in the step (b), the guide member for overlapping boundary is characterized in that it has an arc-shaped cross section having a radius corresponding to the diameter in the longitudinal direction.

In addition, in the step (b), the guide member for overlapping boundary is characterized in that connected to the rebar network or H beam via a spacer.

In addition, in step (a), a guide beam unit is used to adjust the incidence perpendicularity of the primary casing, wherein the guide beam unit has a distance H corresponding to a diameter and a pair of horizontal H arranged horizontally next to each other. Beams; Vertical H beams which are bonded at regular intervals on a lower surface of each of the pair of horizontal H beams with a distance corresponding to a diameter in a longitudinal direction; And a guide diaphragm disposed in a vertical direction at regular intervals between the pair of horizontal H beams to be joined to the vertical H beams to form a rectangular area circumscribed in diameter.

According to the construction method of the retaining wall using the order-type column-type cast-in-placement pile of the present invention, after applying the overlapping guide member to the primary field piles, the hollow portion for the order is placed, and then the secondary field piles include the hollow portion for the secondary field piles. By allowing concrete to be poured, not only the order is assured, but also unlike the prior art, there is no need to have a separate order step. In addition, the gap between the primary pile and the secondary pile is narrowed to have a denser arrangement, thereby increasing the rigidity of the retaining wall. In addition, since the rigidity of the retaining wall is increased, it is possible to reduce the amount of rebar in the rebar network. In addition, the casing excavation equipment used for the primary pile and the secondary pile can be used in the same way, thereby simplifying the construction.

The following drawings, which are attached in this specification, illustrate the preferred embodiments of the present invention, and together with the detailed description thereof, serve to further understand the technical spirit of the present invention. It should not be construed as limited.
(A) and (b) of FIG. 1A are a perspective view and a plan view in a state where a superimposed boundary guide member is installed in a rebar network used in the present method.
1B is a perspective view of one form of a general rebar network;
Figure 2 (a), (b) is a perspective view and a plan view in a state where the guide member for overlapping boundary is installed on the H beam used in the present method.
3 to 8 is a sequential construction state diagram according to the present method.
9 and 10 are construction state diagrams of various embodiments according to the present method.
11A and 11B are a state diagram and a plan view of a guide beam unit applied to the present method.

In the following the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the embodiments presented are exemplary for a clear understanding of the present invention is not limited thereto.

Primary Drill hole  Construction

First, as shown in FIG. 3, a primary casing 101 having a predetermined diameter D is inserted into the ground 10 on which the earth wall is to be constructed, and then drilled with a well-known drilling equipment. The drilling hole 11 is constructed. The drilling rig can be an auger, for example.

Overlap boundary Guide member  Having Rebar  install

Next, as shown in FIG. 2, the reinforcing bar network 20 to which the pair of overlap boundary guide members 30 are attached is lifted and introduced into the primary drilling hole 11.

At this time, the overlapping guide member 30 preferably has an arc-shaped cross section having a radius R corresponding to the diameter D * 1/2 in the longitudinal direction thereof. At this time, the guide member 30 for overlapping boundary is connected to the rebar network 20 via the spacer 32. The guide member 30 for overlapping boundary may be a synthetic resin or a steel sheet, but is not limited thereto. The spacer 32 is installed at regular intervals in the longitudinal direction in the rebar network 20 to connect the guide member 30 for overlapping boundary to the rebar network 20, but is not limited to a specific shape or material.

The reinforcing bar 20 is manufactured including the main reinforcing bars and the strip reinforcing bars, and the main reinforcing bars may be arranged in a square as shown in FIG. 4, but may be arranged in a circular shape.

At this time, instead of the reinforcing bar 20, as shown in FIG. 2, the H-beam 21 to which the guide member 30 for overlapping is attached may be used. At this time, the H beam 21 is preferably installed in the axial direction in consideration of the back pressure received by the earth wall as shown in FIG. In this case, the guide member 30 for overlapping boundary is connected to the H beam 21 through the spacer 32.

Order Hollow part  Formation and primary Casing Drawing

Next, the concrete 100 is poured into the primary drilling hole 11 as shown in FIG. At this time, the poured concrete 100 is synthesized with the reinforcing bar 20 and the outer hollow portion 15 for forming the concrete is not formed on the outside of the guide member 30 for overlapping boundary.

Thereafter, before the poured concrete 100 is cured, the primary casing 101 is drawn and drawn out of the ground 10.

In this way, the reinforcing bar 20 having the overlapping guide member 30 attached to the overlapping boundary in one row is synthesized with the concrete 100 so that the primary pile P1 having the hollow portion 15 for the order is fixed in one row. Constructed at intervals.

Order Hollow section Overlapped  Secondary Drill hole  Construction

Next, as shown in FIG. 6, the secondary casing 102 having the same diameter D is inserted between the adjacent primary drilling holes 11 and 11, and the second drilling hole is drilled with a known drilling equipment. Construct (12).

At this time, the secondary drilling hole 12 is drilled so that the order hollow portion 15 formed by the overlapping guide member 30 existing between the neighboring primary drilling holes 11 and 11 overlaps. Therefore, the center of the secondary boring hole 12 is located closer to the center of the primary boring hole 11 by the maximum width of the hollow portion 15 for the order, so that the primary boring hole 11 and the secondary boring hole ( 12) the center of the liver is reduced more than when not having the hollow portion 15 for the order to achieve a dense arrangement.

Normally Rebar  Or H beam installation

Next, as shown in FIG. 1B, the reinforcing bar 20 without the overlapping guide member 30 installed is lifted and drawn into the secondary boring hole 12.

At this time, the H beam 21 may be used as shown in FIG. 9 in relation to the rebar network 20, or the rebar network 20 and the H beam 21 may be alternately installed.

Order Hollow part  Order construction

Subsequently, after pouring concrete 100 into the secondary drilling hole 12 including the hollow portion 15 for the order as shown in FIG. 8, the secondary casing 102 is pulled out to form the secondary pile P2. Construct

At this time, the concrete 100 is poured into the hollow portion 15 for the order, so that the construction of the earthquake wall made of the order between the first and second piles P1 and P2 is completed.

In this construction method constructed as described above, the gap between the primary pile P1 and the secondary pile P2 is narrowed to have a denser arrangement, thereby increasing the rigidity of the retaining wall. In addition, since the rigidity of the retaining wall is increased, it is possible to reduce the amount of rebar in the rebar network. In addition, by overlapping the hollow portion 15 for the order, the concrete is poured, so that the order is assured and there is no need to have a separate order step. In addition, since the casing excavation equipment used for the primary pile (P1) and the secondary pile (P2) can be used in the same way, the construction is simplified.

On the other hand, the guide beam unit 200 may be used to adjust the indentation perpendicularity of the primary casing 101 as shown in Figure 11 in the primary drilling hole construction step of the present method.

The guide beam unit 200 has a pair of horizontal H beams 201 and 201 and a pair of horizontal H beams 201 and 201 arranged horizontally in parallel with each other with a separation distance L corresponding to the diameter D, respectively. Vertically disposed at regular intervals between the vertical H beam 202 and the pair of horizontal H beams 201 and 201 which are bonded at regular intervals with a separation distance corresponding to the diameter D in the longitudinal direction. It is manufactured by including a guide diaphragm 203 bonded to the H beams 201 and 201 to form a rectangular region circumscribed to the diameter D. At this time, the vertical H-beam 202 preferably has a length sufficient to be buried in the ground to a depth of 1.5m or more to ensure the verticality.

Accordingly, when the primary casing 101 is moved in and out, the periphery of the rectangular area formed by the pair of horizontal H beams 201 and 201 and the guide diaphragm 203 is circumscribed to the outer circumferential surface of the primary casing 101 so that the primary casing At the time of approaching the 101, the verticality can be accurately adjusted.

So far, the present invention has been described in detail with reference to the presented embodiments, but those skilled in the art may make various modifications and modifications without departing from the technical spirit of the present invention with reference to the presented embodiments. will be. The invention is not limited by the invention as such variations and modifications but only by the claims appended hereto.

11: 1st drilling hole
12: secondary drilling hole
20: rebar
30: overlapping guide member
32: spacer
101: primary casing
102: secondary casing
200: guide beam unit

Claims (4)

(a) The primary casing (101) having a predetermined diameter (D) at a predetermined interval (P) in the ground (10) where the earth wall is to be built in and drills to construct the primary drilling hole (11) Steps;
(b) A pair of synthetic resin guides 30 having an arc-shaped cross-section overlaps the reinforcing bar 20 or the H beam 21 attached to each other via a spacer 32 to form a primary hole. 11) introducing into;
(c) After the concrete is poured into the primary drilling hole 11 to form the hollow portion 15 for the non-concrete order on the outside of the guide member 30 for overlapping boundary, the primary casing 101 is opened. Drawing;
(d) the secondary having the same diameter (D) so that the order hollow portion 15 formed by the overlap boundary guide member 30 existing between the adjacent primary drilling holes 11 and 11 overlaps. Accessing the casing 102 and drilling to construct a secondary drilling hole 12;
(e) lifting the reinforcing bar 20 or H beam 21 in which the guide member 30 for overlapping boundary is not installed and drawing it into the secondary drilling hole 12;
(f) pouring concrete into the secondary drilling hole 12 including the hollow portion 15 for the order, and drawing the secondary casing 102; Construction method of retaining wall using thermal cast-in-placement pile. The method of claim 1,
In the step (b), the overlapping guide member 30 has a circular type cross section having an arc-shaped cross section having a radius (R) corresponding to the diameter (D) * 1/2 in the longitudinal direction Method of constructing the retaining wall using the cast-in-placement pile. delete The method of claim 1,
In the step (a) to use the guide beam unit 200 to adjust the vertical proximity of the primary casing 101,
The guide beam unit 200,
A pair of horizontal H beams 201 and 201 arranged horizontally parallel to each other with a separation distance corresponding to the diameter D;
Vertical H beams 202 joined to the lower surfaces of the pair of horizontal H beams 201 and 201 at regular intervals with a distance corresponding to the diameter D in the longitudinal direction;
A guide diaphragm 203 disposed in the vertical direction at regular intervals between the pair of horizontal H beams 201 and 201 and joined to the vertical H beams 201 and 201 to form a rectangular area circumscribed to the diameter D. Construction method of the retaining wall using the order-type column-type cast-in-placement pile, characterized in that produced.

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