KR20060010372A - The wall panel construction method of having used a cast in place underground wall panel coupling device and this - Google Patents

Abstract

It is an object of the present invention to provide a site-pouring underground wall panel connecting device and a method of constructing a wall panel using the same to ensure mechanical continuity and stress transfer between two adjacent panels of reinforced concrete walls formed in the ground.

Field casting underground wall panel connection apparatus according to the present invention for achieving the above object is an inner casing made of a pipe shape of one side blocked; A piston inserted into the inner casing and in close contact with the piston to reciprocate from side to side; Extrusion movement means for compressing and moving the piston on one side; A steel bar formed integrally with one side of the piston and installed along a longitudinal direction of the inner casing; A first fixing plate integrally connected to the other side of the steel bar; An outer casing having a pipe shape to be fitted to an outer circumferential surface of the inner casing; A second fixing plate attached to the outside of the outer casing in a plate shape; A first grout hose and a second grout hose fixedly installed through the second fixing plate; It is connected to the first grout hose and the second grout hose, characterized in that consisting of a supply pipe for supplying the non-shrink mortar.

In addition, the wall panel construction method using the site-pouring underground wall panel connection apparatus according to the present invention for achieving the above object comprises the steps of excavating the ground to a certain depth and width to form a trench; Installing a sheet pile having a predetermined size at one end of the trench; Fixing the site-pouring underground wall panel connection device at a predetermined position in the rebar network; Entering the reinforcing bar network to a predetermined depth in the trench; The site placing underground wall panel connection device is first filled with non-contraction mortar and grouted to maintain a constant pressure until the tip of the site placing underground wall panel connection device contacts the seat pile. Adhering the tip of the connection device to the sheet pile; Forming a panel by pouring concrete into the reinforcing steel bar; Excavating adjacent ground of the panel to a predetermined depth and width to form a trench; Removing the sheet file; Injecting a rebar network into the trench; Performing a grouting process by filling the non-shrink mortar with the second-place underground wall panel connecting device in a second manner, and extruding the steel rod and the first fixing plate of the site-placing underground wall panel connecting device; It is characterized by constructing the continuous continuous wall by continuously connecting the panels in the ground by sequentially repeating the step of forming the panels by curing the concrete in the reinforcing steel network.

On-site placing underground wall panel connection device and wall panel construction method using the same

Description

The wall panel construction method of having used a cast in place underground wall panel coupling device and this}             

1 is a view illustrating a state of use of a site-pouring underground wall panel connection device according to the related art.

Illustrated section,

2a to 2f is a process diagram showing a state of constructing a wall panel using the site-pouring underground wall panel connection apparatus according to the prior art,

Figure 3a to 3c is a cross-sectional view showing a step-by-step use state of the site-pouring underground wall panel connection apparatus according to the present invention,

Figures 4a to 4f is a cast-in-place underground wall panel connection apparatus according to the present invention

Process drawing which shows the state of constructing wall panel using

Figure 5a is a cross-sectional view showing a site cast underground wall panel connection device using a hydraulic jack,

Figure 5b is a cross-sectional view showing a site cast underground wall panel connection device using a spring.

Explanation of symbols on the main parts of the drawing

1: piston stopper 2: ram cylinder

3: lampstone 4: tie bar

5: 1st fixed plate 6: 2nd fixed plate

7: supply pipe 10: inner casing

12: protrusion 14: piston stopper

16: space 20: piston

30: steel rod 42: first fixed plate

44: second fixing plate 46: rubber plate

50: outer casing 60: grout hose

62: first grout hose 64: second grout hose

70: supply pipe 72: first supply pipe

74: second supply pipe 80: spring

90: hydraulic jack A: panel connection device

B: Panel connection device M: Non-shrink mortar

P: Panel R: Rebar mesh

S: Sheet pile T: Trench

The present invention relates to a site-pouring underground wall panel connection device and a method of constructing a wall panel using the same, and in particular, the site-pouring underground wall which ensures mechanical continuity and stress transfer between two adjacent panels of reinforced concrete walls formed in the ground. It relates to a panel connection device and a wall panel construction method using the same.

In general, the SLURRY WALL method excavates trenches to a desired depth while supplying a stabilizer to a trench of a predetermined width to prevent collapse of the excavation surface and groundwater penetration, and then forms reinforced concrete panels in the ground. It is a method of forming a continuous wall by connecting panels.

In the underground continuous wall method using the conventional underground wall panel, as shown in FIGS. 1 and 2A to 2F, first, the ground is excavated to a predetermined depth and width to form a trench T, and the trench ( After installing the sheet pile S having a predetermined size at one end in T), the panel connecting device A is installed in the rebar network R.

Here, as shown in Figure 1, the panel connection device (A) is made of a cylindrical shape while being inserted into the ram cylinder (2) and the ram cylinder (2) in which the piston stopper (1) is formed at one end of the inner close contact A ramp piston 3 which reciprocates from side to side; A tie bar 4 formed integrally with one side of the ram piston 3 and installed along a longitudinal direction of the ram cylinder 2; A first fixing plate 5 connected to one side of the tie bar 4; A second fixing plate 6 attached to the outside of the ram cylinder 2; It consists of a supply pipe 7 which supplies mortar in the ram cylinder 2.

Subsequently, after reinforcing the reinforcing bar network R provided with the panel connection device A as described above into the trench T, the panel connecting device A is brought into close contact with the sheet pile S, and then the reinforcing bar network is installed. After pouring concrete in (R) to form a panel (P), excavating the adjacent ground of the panel (P) to form a trench (T), and then removing the sheet pile (S), the trench (T) ) Into the reinforcing bar (R), and then filling the mortar in the panel connection device (A), the reinforcing bar (inside) in the adjacent trench (T) in the concrete panel (P) on which the tie bar (4) R) It is a method of constructing the continuous wall by forming a panel (P) by pouring concrete into the adjacent trench (T) inside.

Here, after the panel connection device is fixedly installed in the rebar network (R), the tie bar (4) is in close contact with the sheet pile (S), in this state the rebar network (R) in which the panel connection device (A) is located. After the concrete is poured into the panel P to form, after forming the adjacent trenches T of the panel P, the sheet pile S must be removed.

However, the surface of the sheet pile (S) is impossible because the head portion of the tie bar (4) is poured into the concrete, the extrusion of the tie bar (4) to the outside, lack of continuity between structural panels There is.

Accordingly, the present invention has been made to solve the above problems, to facilitate the removal of the sheet pile during the construction of the continuous wall of the ground and to ensure the mechanical continuity and stress transfer between the panels formed in the ground The purpose of the present invention is to provide a site-installed underground wall panel connecting device and a wall panel construction method using the same.                         

Field casting underground wall panel connection apparatus according to the present invention for achieving the above object is an inner casing made of a pipe shape of one side blocked; A piston inserted into the inner casing and in close contact with the piston to reciprocate from side to side; Extrusion movement means for compressing and moving the piston on one side; A steel bar formed integrally with one side of the piston and installed along a longitudinal direction of the inner casing; A first fixing plate integrally connected to the other side of the steel bar; An outer casing having a pipe shape to be fitted to an outer circumferential surface of the inner casing; A second fixing plate attached to the outside of the outer casing in a plate shape; A first grout hose and a second grout hose fixedly installed through the second fixing plate; It is connected to the first grout hose and the second grout hose, characterized in that consisting of a supply pipe for supplying the non-shrink mortar.

In addition, the wall panel construction method using the site-pouring underground wall panel connection apparatus according to the present invention for achieving the above object comprises the steps of excavating the ground to a certain depth and width to form a trench; Installing a sheet pile having a predetermined size at one end of the trench; Fixing the site-pouring underground wall panel connection device at a predetermined position in the rebar network; Entering the reinforcing bar network to a predetermined depth in the trench; The site-placement underground wall panel connection device is initially filled with non-shrink mortar and grouted to maintain a constant pressure until the tip of the site-placement underground wall panel connection device contacts the seat pile. Adhering the tip of the connection device to the sheet pile; Forming a panel by pouring concrete into the reinforcing steel bar; Excavating adjacent ground of the panel to a predetermined depth and width to form a trench; Removing the sheet file; Injecting a rebar network into the trench; Performing a grouting process by filling the non-shrink mortar with the second-place underground wall panel connecting device in a second manner; It is characterized by constructing the continuous continuous wall by continuously connecting the panels in the ground by sequentially repeating the step of forming the panels by curing the concrete in the reinforcing steel network.

Hereinafter, with reference to the accompanying cross-sectional view of the present invention will be described in detail.

Figure 3a to 3c is a cross-sectional view showing a step-by-step use state of the site-pouring underground wall panel connection device according to the present invention, Figures 4a to 4f is a wall panel using the site-pouring underground wall panel connection device (B) according to the present invention It is a process chart which shows the state to construct.

As shown in these figures, the site-pouring underground wall panel connection device (B) according to the present invention includes an inner casing (10) formed of a pipe shape with one side blocked; A piston 20 inserted into the inner casing 10 and being in close contact with each other to reciprocate from side to side; Extrusion movement means for compressing and moving the piston 20 from one side;

A steel bar 30 formed integrally with one side of the piston 20 and installed along a longitudinal direction of the inner casing 10; A first fixing plate 42 integrally connected to the other side of the steel bar 30;

An outer casing 50 having a pipe shape to be fitted to an outer circumferential surface of the inner casing 10; A second fixing plate 44 attached to the outside of the outer casing 50 in a plate shape; A first grout hose 62 and a second grout hose 64 fixedly installed to penetrate through the second fixing plate 44;

It is connected to the first grout hose 62 and the second grout hose 64 is composed of a supply pipe 70 for supplying the non-condensation mortar (M).

Here, the extrusion movement means is composed of any one of the spring 80, hydraulic jack 90, non-contraction mortar (M).

In addition, the inner casing 10 is formed with a plurality of protrusions 12 at regular intervals along the longitudinal direction of the outer circumferential surface thereof, the piston stopper 14 to limit the movement of the piston 20 in one side end thereof. ) Is formed, and a space portion 16 having a predetermined size is formed in an intimate portion with the piston 20.

In addition, the steel bar 30 is installed in the inner casing 10 in a shape in which a portion fixed to the piston 20 is reduced compared to the diameter of the piston 20.

In addition, the first fixing plate 42 is integrally coupled with the steel bar 30, one side portion is coupled to the steel bar 30 is formed in the same diameter as the steel bar 30, the other side is a structure formed in a large diameter The rubber plate 46 is integrally attached to one side.

On the other hand, the first grout hose 62 is connected to the outer casing 50 through the second fixing plate 44, injecting the non-contraction mortar (M) into the first grout hose 62 to the outer casing ( 50) and the second grout hose 64 is connected to the inner casing 10 by passing through the second fixing plate 44, passing through the outer casing 50, and the second grout. It is configured to fill the inner casing 10 by injecting the non-contraction mortar M into the hose 64.

In addition, the supply pipe 70 is composed of one large diameter pipe, the first supply pipe 72 and the second supply pipe 74 made of a small diameter is inserted into the large diameter of the supply pipe 70, the second The first grout hose 62 and the second grout hose 64 are connected to the first supply pipe 72 and the second supply pipe 74, respectively, and the first grout hose 62 is connected to the first supply pipe 72. Is connected to the second supply pipe 74, the second grout hose 64 is connected, through the first supply pipe 72 and the second supply pipe 74 to inject the non-condensation mortar (M) to the inner casing ( 10) and the outer casing 50 is filled.

That is, the site-pouring underground wall panel connection device (B) according to the present invention is largely the inner casing 10, the piston 20, the steel bar 30, the first, second fixing plate (42, 44), the outer casing (50) , The first and second grout hoses (62, 64), the supply pipe 70 and the extrusion movement means (80, 90, M) is composed of the organic combination.

Hereinafter, the site-pouring underground wall panel connection device (B) according to the present invention having the configuration as described above will be described in detail by dividing each component.

The inner casing 10 is made of a general pipe as a main member, the upper and lower ends and the outer peripheral surface and the lower end of the inner peripheral surface of the pipe is processed in accordance with the technical idea of the present invention,

The outer circumferential surface of the inner casing 10 has a plurality of structures formed at regular intervals along the longitudinal direction of the outer circumferential surface along the longitudinal direction of the outer circumferential surface such that the projections 12 are formed to face each other from approximately one third point to the end of the entire casing. This is to increase the adhesion stress when placing concrete.

Particularly, in the present invention, the protrusion 12 is formed on the outer circumferential surface of the inner casing 10 at regular intervals. However, by forming and attaching threads, unevenness, and other wires to the outer circumferential surface of the inner casing 10, the adhesion stress is increased. It should be noted that it is possible to increase, and it is clear that the protrusion 12 is not limited to any particular shape.

In addition, the piston stopper 14 is formed at left and right ends of the inner casing 10.

This is to properly limit the amount of movement of the piston 20 when the piston 20 moves to the left and right of the inner casing 10.

In addition, a space 16 is formed in a portion where one side of the inner casing 10 and one side of the piston 20 contact each other, that is, a portion in which the piston stopper 14 is formed, due to the reduction of the inner diameter. 16) is to facilitate the injection of the non-contraction mortar (M).

On the other hand, the piston 20 is inserted into the inner casing 10, and reciprocating from side to side while being in close contact with the inner casing 10, of the non-shrink mortar (M) injected into the inner casing (10) It moves to the outside of the inner casing 10 by the injection pressure.

In particular, it is noted that the piston 20 uses a plunger-shaped ram piston, which is the piston 20 of the hydraulic drive.

In addition, the steel bar 30, but using a concrete reinforcing steel bar (rebar) used in the construction site, it turns out that can be used as a deformed reinforcing bar or a release PC steel bar as needed.

The steel rods 30 are formed to have an uneven surface formed on the surface thereof, so as to increase the adhesion stress when the concrete is poured, similar to the protrusion 12 of the inner casing 10.

In addition, the first and second fixing plates 42 and 44 are respectively installed at one end of the steel bar 30 and the outer end of the outer casing 50, respectively.

The first fixing plate 42 extends from the steel bar 30 so as to be integrally coupled with the steel bar 30, and one side is formed in the same diameter, and the other side portion is formed in a large diameter plate shape.

That is, the first fixing plate 42 is integrally formed with the steel bar 30, but one side of the first fixing plate 42 is formed with the same diameter as the steel bar 30 so as to smoothly move inside the inner casing 10. , The other side is formed of a large diameter plate-shaped body to block the outer end of the inner casing (10).

In particular, the large-diameter plate-shaped body of the first fixing plate 42 injects the non-contraction mortar (M) in the inner casing 10, the steel bar 30 is moved by the injection pressure of the non-contraction mortar (M), The large-diameter plate-like body formed integrally with the end of the steel bar 30 by the movement of the steel bar 30 is ultimately in close contact with the sheet pile (S) to be described later.

This is to improve the ground pressure between the first fixing plate 42 and the sheet pile (S).

In addition, the rubber plate 46 is attached to the first fixing plate 42 so as to facilitate separation of the first fixing plate 42 and the sheet pile S on the outside of the large-diameter plate-shaped body.

 In addition, the second fixing plate 44 is integrally connected to the outer end of the outer casing 50 to properly block the movement of the inner casing 10 inserted into the outer casing 50.

Here, the first and second fixing plates 42 and 44 may more preferably use anchor plates in which steel plates or section steels are inserted into the bottom of bolts.

  On the other hand, the outer casing 50 is made of the same material as the inner casing 10, since the inner casing 10 is inserted into the outer casing 50, the inner diameter of the outer casing 50 is the inner casing 10 The inner casing 10 is made to be larger than the outer diameter of the inner casing 10 so that the inner casing 10 is in close contact with the inside of the outer casing 50, and the length of the inner casing 10 is about one third of the total length of the inner casing 10. The inner casing 10 is easily supported when moving by the non-shrink mortar (M).

In addition, since the first and second grout hoses 62 and 64 and the supply pipe 70 are used in the construction site as equipment for injecting and transporting the non-shrink mortar M, further description thereof will be omitted.

On the other hand, the non-shrink mortar (M) of the extrusion movement means is a mortar (M) with a small volume change due to bleeding sedimentation or dry shrinkage.

Particularly, it is preferable to use a mixture of an adhesive injection material of aluminum hydroxide of the cross-linked precipitate formed by adding basic alumina sulfate (aluminum sulfate) to cement to the above-mentioned anhydrous mortar (M).

Here, anhydrous mortar (M) is a cement suspension containing about 200 to 500 kg of cement per cubic meter of grout in a gap or cavity, and a basic solution of basic alumina sulfate, and the basicity of alumina sulfate is 2 or more, ( Cement weight / 100) + (basicity of alumina weight in alumina sulfate / √alumina alumina sulfate) is mixed and injected so as to satisfy a condition of 1.33 or more, thereby producing aluminum hydroxide sol.

In this way, the non-condensation mortar (M) is made of cement as the main material, and by adding basic alumina sulfate, it is possible to add this basic alumina sulfate in the desired amount. There is an advantage that can prevent the separation of the material, has the adhesiveness to maintain the fluidity and filling properties, and also has less bleeding, and can exhibit sufficient strength without losing the curing ability.

In addition, using the hydraulic jack 90 used in the general construction site of the extrusion movement means, using the hydraulic jack body and the hydraulic pump separated, by using the force of the hydraulic piston 20 in the outer casing (50) This is to move the piston 20 to the other side by applying hydraulic pressure in a state where it is installed at one side, and then closely fill the moved space with the non-contraction mortar (M).

And, the spring 80 performs a function corresponding to the primary non-shrink mortar (M) injection in the outer casing 50, in particular using an air spring 80 using the compressibility of the air.

That is, the spring 80 is inflated by the spring 80 after the inflation of the spring 80 using an appropriate compression force, and the inside of the outer casing 50 where the spring 80 is located and moved by the spring 80 This is to close the non-condensation mortar (M) in the casing 10 at once.

 Hereinafter, the wall panel construction using the site-pouring underground wall panel connection device (B) according to the present invention having the configuration as described above will be described.

Wall panel construction method using the site-pouring underground wall panel connection device (B) according to the present invention comprises the steps of excavating the ground to a certain depth and width to form a trench (T); Installing a sheet pile (S) having a predetermined size at one end in the trench (T); Fixedly installing the site-pouring underground wall panel connecting device (B) at a predetermined position in the rebar network (R); Entering the reinforcing bar (R) to a predetermined depth in the trench (T); The site-pouring underground wall panel connecting device (B) is first filled with non-contraction mortar (M) and grouted, so that the tip of the site-placing underground wall panel connecting device (B) contacts the sheet pile (S). Contacting the tip of the site-pouring underground wall panel connection device (B) to the seat pile (S) while maintaining a constant pressure until the sheet; Forming a panel (P) by pouring concrete into the reinforcing bar (R); Excavating adjacent ground of the panel (P) to a predetermined depth and width to form a trench (T); Removing the sheet pile (S); Injecting a reinforcing bar (R) into the trench (T); The on-site underground wall panel connection device (B) was charged with secondary shrinkage mortar (M) in a second manner to grout, and thus, the steel rods 30 and the first fixing plate 42 of the site- place underground wall panel connection device (B). Extrusion conveying; In the reinforcing bar (R) by placing concrete curing the step of forming a panel (P) sequentially repeated to connect the panel (P) continuously in the ground to construct the underground continuous wall.

Hereinafter, the wall panel construction method to be constructed through the above steps and steps will be described in detail for each step.

Trench (T) forming step is to form a trench (T) for installing the panel (P) by excavating the ground to a certain depth and width.

Sheet pile (S) installation step is a step of installing a sheet pile (S) having a predetermined size separately produced at one end in the trench (T).

The built-in site-installed underground wall panel connecting device (B) is a step of fixing the site-installed underground wall panel connecting device (B) as described above in the center of the separately manufactured rebar network (R).

Reinforcing bar (R) step is a step of entering the reinforcing bar (R) to the fixed depth in the trench (T) is fixed in the cast-in-place underground wall panel connection device (B) in the step.

The primary non-condensation mortar (M) filling step and the sheet pile (S) contact step is to grout by filling the non-condensation mortar (M) to the site-installed underground wall panel connection device (B), steel bar (30) Step of adhering the tip of the site-pouring underground wall panel connection device (B) in close contact with the sheet pile (S).

That is, when the non-contraction mortar (M) is injected through the first supply pipe 72 of the site-pouring underground wall panel connection device (B), the non-contraction mortar which is an extrusion movement means through the first grout hose 62 ( M) is conveyed into the outer casing 50, and is primarily filled completely in the outer casing 50 by the non-condensation mortar (M) transferred in this way, while the non-condensation mortar (M) injection pressure By the inner casing 10 is moved to one side end in the outer casing (50).

Subsequently, the tip of the site-placement underground wall panel connection device B is maintained while maintaining a constant pressure of the non-contraction mortar M until the tip of the site-injection underground wall panel connection device B contacts the sheet pile S. This step is to be in close contact with the sheet pile (S).

Subsequently, in the forming of the panel P, concrete is poured into the reinforcing bar network R in which the site-pouring underground wall panel connecting device B is located to form a panel P, which is an underground structure.

Subsequently, in the trench T forming step, the adjacent ground of the panel P is excavated with a constant depth and width in the same manner as the trench T to form the trench T.

The sheet pile S may be removed by removing the sheet pile S since it is no longer necessary to be in the ground when the panel P and the trench T are formed.

Reinforcement net (R) step is to reinforce the reinforcing net (R) to the depth of the reinforcing net (R) to the trench (T) in the same way as the reinforcing bar (R) It is a step to enter.

The secondary non-condensation mortar (M) filling step is to grout by filling the non-condensation mortar (M) into the site-pouring underground wall panel connection device (B) in a second step to connect the tip of the site-building underground wall panel connection device (B). It is a step of extrusion transport.

That is, when the non-contraction mortar (M) is injected through the second supply pipe 74 of the site-pouring underground wall panel connection device (B), the non-contraction mortar (M) through the second grout hose 64 is inside The non-condensation mortar (M) is injected into the casing 10 while the non-condensation mortar (M) is filled into the inner casing 10 by the non-contraction mortar (M). By pushing the piston 20 to one side will be sent out.

At this time, the piston 20 is gradually moved by the continuous non-shrink mortar (M) injection in the inner casing 10, and ultimately the piston 20 to the portion where the piston stopper 14 in the inner casing 10 is formed At the same time, the piston stopper 14 no longer moves the piston 20, and the inner casing 10 is completely sealed by the non-shrink mortar (M).

In addition, the piston 20 exposed to a certain portion as described above is inserted into a predetermined portion into the reinforcing bar network (R), and thus inserted sited underground wall panel connecting device (B) in the reinforcing bar network (R) Fix it firmly.

Finally, the step of forming the panel (P) includes placing the concrete in the reinforcing bar (R), including an on-site placing underground wall panel connection device (B), one side of which is embedded in the panel (P) and fixed in the reinforcing bar (R). By curing, the panel P is formed, and at the same time, the underground continuous wall to which the panel P and the panel P are connected is formed.

That is, the site-pouring underground wall panel connecting device (B) according to the present invention is to cast concrete through the panel (P) and the panel (P) in the middle of the site-pouring underground wall panel connecting device (B) to connect to each other. It is.

By repeating the above-described series of steps sequentially, it will be apparent that the underground continuous wall having a constant width can be constructed by continuously connecting the panels P in the ground.

In the above described the construction of the wall panel (P) using the site-pouring underground wall panel connection device (B) using the non-shrink mortar (M) as a crimping means, in the following method using the hydraulic jack 90 and the spring 80 Explain about.

Here, the extrusion movement means, that is, the means for extruding the tip of the site-installed underground wall panel connection device (B) by installing a hydraulic jack 90 or a spring 80 in place of the non-shrink mortar (M), such a hydraulic jack ( It will be appreciated that not only the inner casing 10 may be moved to the outside of the outer casing 50 by using the spring 80 or the spring 80 but also the steel rod 30 may be extruded smoothly.

That is, the spring 80 located in the outer side of the piston 20 and the outer casing 50 is a spring compressed by adjusting one end of the site-installed underground wall panel connection device (B) fixedly fixed in the reinforcing bar (R) The 80 is expanded to a predetermined length to expand the inside of the outer casing 50 to this expansion force.

In addition, when the spring 80 is inflated and the non-shrink mortar (M) is injected into the outer casing 50 through the supply pipe 70, the non-shrink mortar (M) through the first grout hose 62. ) Is transferred into the outer casing 50, and the inner casing 50 is completely filled by the non-condensation mortar (M) transferred as described above, and thus the non-condensation mortar (M) injection pressure As a result, the inner casing 10 is moved to one side end in the outer casing 50.

In addition, the spring 80 located outside the piston 20 and in the outer casing 50 is a spring compressed by adjusting one end of the site-installed underground wall panel connection device (B) fixedly fixed in the reinforcing bar (R) The 80 is expanded to a predetermined length to expand the inside of the outer casing 50 to this expansion force, and then the interior is cast and cured with non-contraction mortar (M).

That is, after filling the inside of the outer casing 50 using the spring 80 as described above primarily with the non-shrink mortar (M), and then in close contact with the sheet pile (S), the second non-shrink mortar (M) again ) To compress and move the steel bar (30) connected to the piston (20).

Subsequently, the steel bar 30 partially exposed to the outside is inserted into a predetermined portion into the reinforcing bar (R), and the inserted sited underground wall panel connection device (B) firmly inserted into the reinforcing bar (R). Fix it.

On the other hand, the hydraulic jack 90 of the compression movement means using the hydraulic jack 90 located in the outer casing 50 and the outer side of the piston 20, first, the first non-shrinkage inside the outer casing 50 After filling with mortar (M), the site-pouring underground wall panel connecting device (B) is in close contact with the surface of the seat pile (S), and then again hydraulically applied to the hydraulic jack 90 to the site-pouring underground wall panel connecting device After the steel bar 30 of (B) is inserted into a predetermined portion into the rebar network R, the non-condensation mortar M is secondly filled in the inner casing 10.

 That is, the hydraulic jack 90 and the spring 80 as described above is in the inner casing (1) by the restoring force of the hydraulic pressure or the spring 80 in the state located in the outer casing 50 and one side of the inner casing (10). It is to be understood that it is a mechanism for pressing and moving 10).

Therefore, the present invention refers to the non-shrink mortar (M), the hydraulic jack 90, the spring 80, etc. as an extrusion movement means representatively, but it turns out that other extrusion movement means can also be used appropriately, It is to be noted that the right of invention affects.

As described above, the site-pouring underground wall panel connection device and the wall panel construction method using the same according to the present invention facilitate the mechanical continuity and stress transfer between two adjacent panels of reinforced concrete walls formed in the ground in a reliable state. There is an advantage to construct underground continuous wall

Claims (15)

An inner casing 10 formed of a pipe shape of which one side is blocked; A piston 20 inserted into the inner casing 10 and being in close contact with each other to reciprocate from side to side; Extrusion movement means for compressing and moving the piston 20 from one side; The piston 20 and one side is integrally formed, the steel bar 30 is installed along the longitudinal direction of the inner casing (10); A first fixing plate 42 integrally connected to the other side of the steel bar 30; An outer casing 50 having a pipe shape to be fitted to an outer circumferential surface of the inner casing 10; A second fixing plate 44 attached to the outside of the outer casing 50 in a plate shape; A first grout hose 62 and a second grout hose 64 fixedly installed to penetrate through the second fixing plate 44; On-site placing underground wall panel connection device, characterized in that consisting of a supply pipe 70 is connected to the first grout hose 62 and the second grout hose (64) to supply the non-contraction mortar (M). The method of claim 1, Wherein the extrusion movement means hydraulic jack 90, spring 80, non-shrink mortar (M) of the site cast underground wall panel connection device, characterized in that consisting of any one. The method of claim 1, The inner casing (10) is a site-pouring underground wall panel connection device, characterized in that a plurality of protrusions (12) are formed at regular intervals along the longitudinal direction of the outer peripheral surface thereof. The method of claim 1, On-site placing underground wall panel connecting device, characterized in that the piston stopper (14) is formed to limit the movement of the piston (20) inside one side end of the inner casing (10). The method of claim 1, On-site casing 10 wall panel connecting device, characterized in that the space portion 16 of a predetermined size is formed in close contact with the piston (20). The method of claim 1, Wherein the steel bar 30 is a site-installed underground wall panel connection device, characterized in that the part fixed to the piston 20 is installed in the inner casing (10) in a reduced shape compared to the diameter of the piston (20). The method of claim 1, The first fixing plate 42 is integrally coupled with the steel bar 30, one side portion is combined with the steel bar 30 is formed in the same diameter as the steel bar 30, the other side is characterized in that formed in a large diameter In-Place Underground Wall Panel Connection. The method according to claim 1 or 7, On-site placing underground wall panel connecting device, characterized in that the rubber plate 46 is integrally attached to the first fixing plate (42). The method of claim 1, The first grout hose 62 penetrates through the second fixing plate 44 and is connected to the outer casing 50. The first grout hose 62 injects the non-contraction mortar M into the first grout hose 62 to form the outer casing 50. Field placing underground wall panel connection device, characterized in that configured to charge the inside. The method of claim 1, The second grout hose 64 passes through the second fixing plate 44, passes through the outer casing 50, and is connected to the inner casing 10. The non-condensation mortar (M) is connected to the second grout hose 64. Injecting underground wall panel connection device, characterized in that configured to fill the inner casing (10) by injecting. The method of claim 1, The supply pipe 70 is made of a single large diameter pipe, the first supply pipe 72 and the second supply pipe 74 made of a small diameter inserted into the large diameter of the large diameter pipe is installed on site Wall panel connection. The method of claim 11, The first grout hose 62 and the second grout hose 64 are connected to the first supply pipe 72 and the second supply pipe 74, respectively, and the first grout hose 62 is connected to the first supply pipe 72. Is connected, and a second grout hose 64 is connected to the second supply pipe 74 to inject the non-contraction mortar M through the first supply pipe 72 and the second supply pipe 74. An on-site placing underground wall panel connecting device, characterized in that configured to charge the casing (10) and the outer casing (50). Excavating the ground to a constant depth and width to form a trench (T); Installing a sheet pile (S) having a predetermined size at one end in the trench (T); Fixedly installing the site-pouring underground wall panel connecting device (B) at a predetermined position in the rebar network (R); Entering the reinforcing bar (R) to a predetermined depth in the trench (T); The site-pouring underground wall panel connecting device (B) is first filled with non-contraction mortar (M) and grouted, so that the tip of the site-placing underground wall panel connecting device (B) contacts the sheet pile (S). Contacting the tip of the site-pouring underground wall panel connection device (B) to the seat pile (S) while maintaining a constant pressure until the sheet; Forming a panel (P) by pouring concrete into the reinforcing bar (R); Excavating adjacent ground of the panel (P) to a predetermined depth and width to form a trench (T); Removing the sheet pile (S); Injecting a reinforcing bar (R) into the trench (T); The on-site underground wall panel connection device (B) was charged with secondary shrinkage mortar (M) in a second manner to grout, and thus, the steel rods 30 and the first fixing plate 42 of the site- place underground wall panel connection device (B). Extrusion conveying; On-site casting is characterized by constructing underground continuous walls by continuously connecting the panels P in the ground by sequentially repeating the step of curing concrete in the rebar network R to form the panel P. Wall panel construction method using underground wall panel connection device. The method of claim 13, The panel connection device (B) An inner casing 10 formed of a pipe shape of which one side is blocked; A piston 20 inserted into the inner casing 10 and being in close contact with each other to reciprocate from side to side; An extrusion movement means made of any one of a hydraulic jack (90), a spring (80), and a non-shrink mortar (M) to squeeze and move the piston 20 from one side; A steel bar 30 formed integrally with one side of the piston 20 and installed along a longitudinal direction of the inner casing 10; A first fixing plate 42 integrally connected to the other side of the steel bar 30; An outer casing 50 having a pipe shape to be fitted to an outer circumferential surface of the inner casing 10; A second fixing plate 44 attached to the outside of the outer casing 50 in a plate shape; A first grout hose 62 and a second grout hose 64 fixedly installed to penetrate through the second fixing plate 44; On-site placing underground wall panel connection device, characterized in that consisting of a supply pipe 70 is connected to the first grout hose 62 and the second grout hose (64) to supply the non-contraction mortar (M). The method of claim 14, The non-condensation mortar (M) is a cast-in-place underground wall panel connecting device, characterized in that the cement suspension containing cement and the basic alumina sulfate solution mixed and injected as a main material to produce aluminum hydroxide sol.

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