KR20060116933A - A construction method of concrete retaining wall using anchor - Google Patents

Abstract

A sheeting method for a self-supporting cutoff wall using an anchor body is provided to improve bearing strength of a cutoff wall by installing an anchor body in a steel pipe pile, to function as a support beam for the ground by reinforcing the inside of a cutoff wall using an anchor body and to improve airtightness by injecting PE(polyethylene) for reinforcement to the outside of a cutoff wall and preventing the inflow of soil or underground water. A sheeting method for a self-supporting cutoff wall using an anchor body comprises the steps of perforating the ground, inserting a steel pipe for forming a cutoff wall on the perforated ground, inserting an anchor body attached with a steel wire into the steel pipe and forming an anchorage by grouting on the fixed anchor length of the anchor body, applying tensile force to the steel wire to give stiffness to the anchor body and installing a load cell on the upper part, and then measuring displacement of load, forming a cutoff wall by grouting the inside of the steel pipe and placing cap concrete on the head of the anchor body, attaching anchor bodies to the inside of the cutoff wall continuously using a connecting socket and excavating the ground, and injecting PE(polyethylene) to the outside of the cutoff wall.

Description

A construction method of concrete retaining wall using anchor

1 is a flow chart showing the construction of the self-supporting order wall using the anchor body of the present invention.

Figure 2a is a side view showing the perforation of the ground for the anchor body insertion.

Figure 2b is one side view showing a steel pipe for the earth inserted into the perforated ball.

Figure 2c is one side view showing the formation of the fixture by grouting after inserting the anchor body into the steel pipe.

Figure 2d is a side view showing a load meter installed on the top of the anchor body.

Figure 2e is a side view showing the implementation of grouting in the steel pipe.

Figure 2f is a side view showing the cap concrete to the anchor head.

Figure 2g is a side view showing the excavation of the ground for building construction, after the order wall is formed.

Figure 2h is one side view showing the attachment of the anchor body inside the undulating order wall.

3 is a perspective view showing a connecting socket for connecting crossed anchors;

4 is a plan view illustrating attachment of the anchor wall support body.

Figure 5 is a plan view showing the injection of the reinforcing PE to prevent the ingress of foreign matter on the outer side of the order wall.

Figure 6 is a plan view showing the installation of the support using a steel bar and steel wire to strengthen the bearing capacity of the order wall.

<Explanation of symbols for the main parts of the drawings>

10. Order wall installation step 20. Order wall reinforcement step 30. PE injection for reinforcement

40. Order wall 41. Anchor body 41a. Steel wire

42. Socket 43. Steel pipe 44. Fusing unit

45. Cap concrete 46. Steel bar 47. Load gauge

50. Connecting socket 51. Steel wire insertion hole 52. Outside

53. Inner Case 54. PE (Polyethylene) 55. Steel Bar

56. Liner

The present invention relates to a construction method for the ground piles and the soil barrier at various construction sites, and more specifically, to improve the bearing capacity of the barrier wall using an anchor body provided separately, and to reinforce the inner side of the barrier wall to be applied from the outside The present invention relates to a self-supporting order wall retaining method using an anchor body to prevent earth pressure.

In order to efficiently use the limited land for the construction of buildings, most of the construction work is carried out by digging the building.In the process of excavating underground, the construction is possible without damaging existing facilities such as adjacent buildings or roads. As for the barrier wall, it is installed.

The method for installing the barrier wall for earthquake is being applied to a variety of methods, such as the method of hitting the H pile at a predetermined interval, the method of sandwiching the earth plate between the H pile, Soil cement construction method, cast-in-place concrete pile The method, and the Soil Nailing method are used.

However, the earthen block method has a disadvantage in that the separation distance from the adjacent land boundary should be secured at least 700 mm since the hole hole specification is at least Φ350 mm or more when H-pile drilling, CIP drilling, and SCW drilling are performed. Site border invasion is frequent in the area, the equipment size is not easy to work in a narrow space, as well as the impact on the surrounding structure is large, the noise and vibration is very large, there is a problem of high complaints.

Particularly, in the case of earth wall construction, the backfilling of the earth wall causes the settlement phenomenon due to the relaxation of the surrounding ground, which has a disadvantage that the influence on the surrounding structure is very large. In addition, in case of CIP method, there is no fear of sinking, but the construction period is delayed because the double hole can not be constructed continuously, and the construction cost is increased by more than 300% of the earth wall construction, and the occurrence of civil complaints is high due to noise vibration during drilling. However, due to poor connectivity between the pillars, the degree of water quality is lowered, and there is a problem of needing a separate method of leaking due to the high possibility of soil loss. In addition, the SCW method has the advantage that continuous construction is possible, but the noise and vibration caused by the large size of the equipment is very large, causing civil complaints, and the construction cost is also increased by more than 300% of the earth wall construction. Since weathering soil should be included more than 50%, it has the disadvantage that the limitation of site ground condition is very severe during construction.

The present invention improves the bearing capacity of the anchor wall by installing the anchor body in the steel pipe pile that is placed on the construction site, and reinforces the inner side of the barrier wall with the anchor body provided with the anchor wall separately when the ground is piled up, so that It serves to reinforce and order the ground due to the outflow of granules between the steel pipe and the steel pipe.

In the order wall using the anchor body, after the ground drilling, the steel pipe is inserted, and after the anchor body with the steel wire is inserted, concrete is placed on the anchor body to form a fixture, to give rigidity to the steel wire, and to the upper end of the steel wire The load gauge is installed, the crowding is carried out inside the steel pipe, and the order wall mounting step 10 of placing cap concrete on the head of the anchor body is attached, and the anchor body is attached to the inside of the installed order wall, After attaching the fixing connecting socket 50 at the intersection, the rigidity is given to the steel wire, and the steel wire intersected in the connecting socket is fixed, and the steel bar 55 is driven outside the order wall to connect with the steel pipe (P). Regarding the order wall reinforcing step 20 and the self-supporting order wall mudstone method using an anchor body to form the order wall by injecting the reinforcement PE 60 into the outer side of the order wall

Hereinafter, with reference to the accompanying drawings, the "self-supporting order wall retaining method using an anchor body" according to the present invention will be described in detail as follows.

1 is a flow chart illustrating the construction of the self-supporting order wall retaining method using the anchor body made of the present invention, to improve the bearing capacity of the order wall installation step (10) and the earth pressure of the installed order wall in the construction site Reinforcement wall reinforcing step 20 using the anchor body is made of a reinforcement PE reinforcement step 20, and a reinforcement PE (polyethylene) injection (30) for preventing the gap between the steel pipe and the steel pipe forming the order wall.

First, the ground is drilled to install the order wall 40, the steel pipe P is formed for forming the order wall 40 in the perforated ground, and the anchor body 41 is inserted into the steel pipe 43, followed by grouting. After the fixing body 44 'is formed, and rigidity is given to the upper portion thereof, a load gauge 47 is installed, grouting is performed in the ball to fill the inside of the ball, and the head is finished with cap concrete 45.

When the order wall 40 is formed, the anchor body 41 is attached to the inside of the order wall 40, the anchor body 41 is fixed by the fixing socket 42, and then the anchor body 41 is tensioned to provide rigidity. After the provision, the anchor body 41 is fixed to complete the installation, and PE (polyethylene) 54 is injected into the outer side of the order wall 40 formed of the steel pipe 42 to prevent inflow of granules from the outside.

Figure 2a is a side view showing the perforation of the ground for the insertion of the anchor body, to drill the ground at regular intervals to the burial plan line to insert the steel pipe 43 forming the order wall 40.

FIG. 2B is a side view illustrating the insertion of the retaining steel pipe 43 into the perforated hole.

FIG. 2C is a view illustrating the fixing body 44 'as a grout after inserting the anchor body 41 into the steel pipe 43, and grouting is performed only on the fixing unit 44 of the anchor body.

The fixing unit 44 'is formed in the lower portion of the steel pipe 43 by grouting applied to the fixing unit 44, thereby improving the independence of the steel pipe 43 pipe.

When curing of the grouting performed on the fixing unit 44 is completed, a tensile force is applied to the steel wire in order to give rigidity to the anchor body 41, and then a load cell 47 is installed on the upper portion to increase the displacement of the load. Measure

The load gauge 47 measures the load on the steel wire 41a through pre-stress and checks whether it is functioning as a rigid wall so that the information construction can be performed.

FIG. 2E is a side view showing grouting in the steel pipe to grind the steel pipe 43 in an empty space to form the order wall 40.

After the grouting is completed in the order wall 40, the cap concrete 45 is applied to the head of the anchor body 41 to complete the construction of the order wall.

Figure 2g is a side view showing the excavation of the ground for building construction, after the order wall 40 is formed.

Figure 2h is a side view showing the attachment of the anchor body 41 to the inside of the ordered wall, the anchor 41 is attached to the inner wall is installed in the vertical direction and the horizontal direction.

The anchor body 41 has a fixing portion 44 is formed at the end, it is connected by a steel wire (41a), each anchor body 41 is connected to the anchor body 41 by using a connecting socket (50) Give it.

3 is a perspective view illustrating a connecting socket 50 connecting the crossed anchor bodies 41. The steel wires of the anchor bodies 41 attached to the inside of the order wall 40 in the up, down, left, and right directions have a tensile force in each direction. After attaching, fix the steel wires by using welding or fixing wires to prevent them from being twisted together.

Therefore, in order to connect the steel wires of the anchor body 41 attached to the upper, lower, left and right, the connection socket 50 has steel wire insertion holes 51 formed at the upper, lower, left and right sides, and the order wall 40 It is separated into an outer case 52 and an inner case 53 attached to the outer case 52, first attaching the outer case 52 to the point where the anchor body 41 intersects the order wall 10 by welding, After the rigidity is given to the steel wires 41a inserted into the left and right sides, it is prevented from being twisted or welded with each other to fix each anchor body.

After twisting or welding the steel wire of the anchor body 41, the inner case 53 is attached to complete the attachment of the connecting socket 50.

4 is a plan view showing the attachment of the anchor wall support body 41, the anchor body 41 formed in a predetermined size is attached to the ground using the connecting socket 50, while performing the ground excavation work.

The anchor 41 formed inside the order wall increases the independence of the order wall and the shear resistance due to the lateral pressure.

Figure 5 is a plan view showing the injection of the reinforcement PE (60) to prevent the infiltration of foreign matter to the outside of the order wall, the outside of the order wall, i.e. the inflow of soil or groundwater into the pit site by the gap of the steel pipe pipe is not made. Reinforcement PE is injected to prevent filling the gap of steel pipe and improve airtightness.

FIG. 6 is a steel wire 41a which is inserted into and installed in the driven steel bar 55 and the steel pipe 43 after driving the steel bar 55 outside the impingement wall 40 to increase the resistance to the lateral pressure of the formed order wall. To the steel wire 56 to increase the resistance of the steel pipe 43 against the earth pressure applied from the outside of the order wall to further improve the safety of the order wall.

Improving the independence of the order wall 10 by the anchor body to be inserted and fixed in the steel pipe pipe forming the order wall 40 as described above, and the anchor body 41 attached to the inner surface of the steel pipe pipe to be excavated, Self-supporting order wall cladding method using anchor body to improve shear force against lateral pressure.

The present invention improves the bearing capacity of the wall by using the anchor body provided separately for the order and soil barrier in the ground construction site, and reinforces the anchor wall to prevent the earth pressure applied from the outside by reinforcing the inner side of the wall By the anchor wall method, anchor body is installed in the steel pipe pile that is placed on the construction site to improve the bearing capacity of the barrier wall, and by reinforcing the inner side of the barrier wall with the anchor body equipped with the barrier wall when ground excavation, It acts as a support, and has the effect of reinforcing and ordering the ground due to the outflow of the granules between the steel pipe and the steel pipe, which is the order wall, and removing the belt for the brace.

Claims (2)

In the order wall using the anchor body, After the ground drilling, the steel pipe 43 is inserted, and after the anchor body 41 with the steel wire 41a is inserted, concrete is poured into the anchor body 41 to form a fixing body 44 ', and the steel wire ( The rigid body 41 is provided to 41a), and a load gauge 47 is provided at the upper end of the steel wire 41a, and the crowding is performed inside the steel pipe 43, and then the anchor body 41 provided as the load gauge 47 is provided. An order wall installation step (10) of pouring cap concrete (45) on the head; After the anchor body 41 is attached to the inside of the installed order wall 40, and the fixing connecting socket 50 is attached where the steel wire 41a of the anchor body 41 crosses, the rigid wire 41a is rigid. By giving a, after fixing the steel wire (41a) intersected in the connection socket 50, the order wall reinforcement step 20 for driving the steel bar 55 on the outer wall 40 and connecting with the steel pipe (P); A self-supporting barrier wall construction method using an anchor body to form a barrier wall 40 by injecting a reinforcement PE (60) to the outer side of the barrier wall. According to claim 1, wherein the connection socket 50 has one side open to the box of the rectangular shape, the insertion hole 51 into which the steel wire of the anchor body 41 is inserted in the side, the upper, lower, left, right Self-contained water barrier wall construction method using an anchor body consisting of the outer case 52 and the inner case 53 is formed to form the order wall.

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