KR102214786B1 - Concrete compaction device for underground structure and construction method of underground continuous wall using the same - Google Patents

Abstract

The present invention relates to a concrete compaction device for closely compacting concrete of an underground structure such as an underground continuous wall and a construction method for an underground continuous wall using the same, wherein the concrete compaction device comprises: a support frame having a receiving space; a vibration beam installed to be vibrated on the support frame; a vibration motor installed on the vibration beam; and a vibration rod mounted on the vibration beam to transmit vibration of the vibration beam to an object to be vibrated.

Description

Concrete compaction device for underground structures and construction method of underground continuous wall using the same {CONCRETE COMPACTION DEVICE FOR UNDERGROUND STRUCTURE AND CONSTRUCTION METHOD OF UNDERGROUND CONTINUOUS WALL USING THE SAME}

The present invention is a device for compacting concrete so that a high-quality underground structure can be built by promoting tight filling of concrete when constructing an underground structure of a reinforced concrete structure in the ground, such as a slurry wall, and an underground continuous wall construction using the same. It's about how.

If the ground is to be excavated to build an underground building in the ground, an earthen wall is installed to prevent the collapse of the excavation surface and to prevent groundwater from flowing into the working space.

Various construction methods can be applied according to the working environment or conditions, such as ground conditions and the scale of the underground building, for the construction of such earthing walls. Among them, the underground continuous wall construction method, also called the slurry wall construction method or the D-wall construction method. The wall constructed by the structure has very high water-repellency and rigidity and can be used as a permanent wall of this structure, so it is particularly widely used in large-scale construction in urban areas or large depth constructions where a lot of groundwater flows out.

The construction of such an underground continuous wall is performed by excavating the ground to form a trench of a certain width, inserting a reinforcing bar mesh into the trench, and then pouring concrete using a tremi pipe.

Since the wall constructed in this way has to function as an outer wall of an underground building even after the temporary function as an earthen barrier wall is completed, the amount of reinforcing bars to be buried in the trench increases considerably, and the rebar spacing of the rebar network becomes very dense, and in the case of a deep wall The degree of compactness becomes greater.

In such a case that the reinforcing bar network must be designed very densely, the aggregate may not be evenly and tightly filled in the space inside and outside the reinforcing bar when concrete is poured, and this leads to voids that cause leakage inside the wall.

Therefore, in order for the underground continuous wall to have a perfect order structure, sufficient compaction for the concrete poured into the trench is required, but the depth at which the concrete is poured is very deep and there is no externally exposed part except for the upper part. As a result, it is not possible to prevent the occurrence of leakage defects, as the lower part is not particularly determined.

In order to solve this problem, a device for compacting concrete while moving inside a reinforcing bar network so as to be located on top of the concrete to be poured has been proposed as Registration No. 10-1718234.

The compaction device of Registered Patent Publication No. 10-1718234 includes: a vibration means 13 positioned on the upper side of the concrete to be poured as shown in FIG. 1 (a); A vibration connecting member 14 having one end connected to one side of the vibration means 13 and extending in the transverse direction; A mounting grip member (14a) provided at the other end of the vibrating connection member (14) and in contact with one side of the poured reinforcing bar network; A position adjusting means (14b) provided between the excitation connecting member (14) and the excitation means (13) to adjust the position of the excitation connecting member; At least one vibrator (1) provided on the lower surface of the vibrating means (13) and immersed in concrete to be poured to vibrate; And a position moving means provided between the vibrating means and the vibrator to move the vibrator along a lower surface of the vibrating means.

The compaction device is, as shown in Figure 1 (b), by contacting the mounting grip member (14a) to the main reinforcing bar 41 of the reinforcing bar 41 and the reinforcing bar formed by the circular band reinforcement 42 Vibration is transmitted to the reinforcing bar, and this compaction device can be moved to the top of the poured concrete using a position moving means controlled by a control unit.

However, since the compaction device has a circular cross section and a space is formed therein, it can only be applied to a reinforcing bar network that can be moved upwards, and can only be moved upward, so that the width is narrow and the length is long. It is not possible to apply itself to structures such as reinforcing bars in underground continuous walls where shear reinforcing bars are to be laid.

In addition, since the compaction device must be accurately moved according to the height at which the concrete is placed, the operator's skill is required to operate the compaction device, and maintenance such as the compaction device is buried in concrete is not easy in case of inexperienced operation.

KR 10-1718234 B1

The present invention has been devised to solve the above problems of the prior art, and can be applied universally regardless of the shape and scale of the reinforcing bar network, and can be easily used by unskilled persons, and is easy to maintain. Its purpose is to provide a concrete compaction device for an underground structure and a method of constructing an underground continuous wall using the same.

According to the most preferred embodiment of the present invention for solving the above problems, a support frame provided with an accommodation space, a vibration beam installed to enable vibration in the support frame, a vibration motor installed in the vibration beam, A concrete compaction device for an underground structure, characterized in that comprising a vibration rod mounted on the vibration beam and transmitting the vibration of the vibration beam to an object to be vibrated, is provided.

In this case, an elastic support may be installed in the receiving space to cause the vibration beam to vibrate while being supported by the elastic support, and a height adjustment means may be installed under the elastic support to adjust the height of the vibration beam.

In addition, while the support frame is composed of a floor plate and a wall plate installed on both sides of the floor plate to form the accommodation space, a working opening may be provided on the wall plate to operate the height adjusting means.

In addition, according to another embodiment of the present invention, a method of constructing an underground continuous wall using the above-described concrete compaction device, comprising: a) installing a guide wall; b) forming a trench in the ground; c) installing the concrete compaction device on both sides of the trench; d) inserting a reinforcing bar mesh having an upper hook in the trench; e) fixing the hook to the vibration rod of the concrete compactor; f) pouring concrete into the trench while vibrating the reinforcing bar using a concrete compactor; g) removing the concrete compaction device; a method for constructing an underground continuous wall, characterized in that consisting of.

The concrete compaction device according to the present invention and the construction method therefor use the reinforcing bar network itself buried inside the underground continuous wall as a means for compaction, so that a high-quality basement where the concrete is tightly filled by making even compaction over the entire pouring range. Allows a continuous wall to be built.

In addition, since the concrete compaction device according to the present invention allows compaction to be performed only by the operation of the vibration motor in the state of being fixedly installed outside the trench, it can be easily operated by the unskilled person, and the assembly and disassembly of the support frame, the vibration beam and the vibration rod are simple. Therefore, maintenance such as replacement of parts is easy.

In addition, since the concrete compaction device according to the present invention also functions to support the reinforcing bar net inserted therein until the concrete poured in the trench is cured, the effect of reducing the process by omitting the separate support installation process for supporting the reinforcing bar net. Represents.

1 is a perspective view of a concrete compaction device according to the prior art.
Figure 2 is a state diagram of a concrete compaction device is installed according to an embodiment of the present invention.
3 is a perspective view and a cross-sectional view of the main body of the concrete compaction device of the present invention.
4 is an exploded perspective view of the main body as viewed from above.
5 is an exploded perspective view of the main body as viewed from below.
6 to 12 are cross-sectional views of each step of the method for constructing an underground continuous wall according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in the case of obscuring or obscuring the technical idea of the present invention due to a detailed description of a known configuration in the description of the present invention, a description of the known configuration will be omitted.

Figure 2 is a perspective view showing the overall state of the installation of the concrete compaction device 10 for an underground structure according to an embodiment of the present invention, Figure 3 is related to the main body of the concrete compaction device 10, (a) is a perspective view thereof And (b) is a cross-sectional view of the AA part, and FIGS. 4 and 5 are each showing a state viewed from the top and bottom by disassembling the main body of the concrete compactor 10.

Concrete compaction device 10 of the present invention, as shown in the above drawings, the concrete compaction device 10, a main body consisting of a support frame 100, a vibration beam 200, and a vibration motor (M) and , It consists of a vibration rod 400 installed in the main body to deliver vibration to the to-be-vibrated body so that the poured concrete (C) is compacted.

As shown in FIG. 2, the support frame 100 supports the concrete compaction device 10 to be stably installed on the ground or the support floor, and to smoothly vibrate the vibration beam 200. do.

The support frame 100 includes a floor plate 110 placed on a ground or a support floor, and a wall plate 120 vertically installed on both sides of the floor plate 110, respectively.

The wall plate 120 may be configured as a vertical plate, but preferably, a vertical web 121 and an upper horizontal flange 122 and a lower horizontal flange 123 bent outwardly at the upper and lower ends of the vertical web 121 It is made to have the shape of a ``c'' cross section. In this case, the lower horizontal flange 123 facilitates the installation of the wall plate 120 with respect to the bottom plate 110, and the upper horizontal flange 122 facilitates the installation of the guide body 130 to be described later, and the wall plate (120) By increasing its torsional stiffness and flexural stiffness, the support frame 100 is prevented from being deformed by the working load, and durability is increased. A reinforcing plate 124 is installed between the upper horizontal flange 122 and the lower horizontal flange 123 to prevent deformation such as local buckling in the vertical web 121.

It is preferable that the support frame 100 has an integral structure as a whole by installing the connection plate 125 between the wall plates 120 on both sides.

The support frame 100 is provided with a receiving space S by the bottom plate 110 and the wall plates 120 on both sides, and the vibration beam 200 is provided by installing an elastic support 300 in the receiving space S. It can have a structure supported by the elastic support 300.

The elastic support 300 includes an elastic member 310 installed in close contact with the lower surface of the vibration beam 200 and a support plate 320 for fixing and supporting the lower portion of the elastic member 310.

The elastic member 310 induces the vibration of the vibration beam 200 to be smoothly performed by an elastic force, and for example, a coil spring may be used.

Upper fixing protrusions 211 and lower fixing protrusions 321 are provided on the lower surface of the vibration beam 200 and the upper surface of the support plate 320 so that the upper and lower ends of the elastic member 310 can be fixed.

In addition, a pair of diaphragms 210 are further installed on both sides of the outer side of the upper fixing protrusion 211 in the longitudinal direction on the lower surface of the vibration beam 200.

The diaphragm 210 serves as a housing for the elastic support 300 while having a structure of a square tube for accommodating the elastic support 300 therein together with the guide plate 131 to be described later. The elastic member 310 whose upper and lower ends are fixed by the upper and lower fixing protrusions 211 and 321 in the structure of the square tube body does not cause a problem such as deviating from its position during the process of vibrating the vibration beam 200.

The support plate 320 supports the elastic member 310 so that the elastic member 310 is compressed to an appropriate degree and supports the vibration beam 200. Accordingly, the position of the vibration beam 200 is set according to the height adjustment of the support plate 320.

Accordingly, a height adjustment means 330 may be further installed under the support plate 320 so that the support plate 320 is fixed to adjust the height at which the elastic member 310 is supported.

The height adjustment means 330 adjusts the height of the support beam so that the vibration rod 400 can be easily and accurately fixed and installed. This will be described again in connection with the underground continuous wall construction method to be described later.

The height adjustment means 330 is sufficient as long as it can freely move the support plate 320 up and down, and there is, for example, a hydraulic jack or a screw jack that can be manually operated.

The wall plate 120 of the support frame 100 may be provided with a working opening 121a. The work opening 121a facilitates the operation and management of the height adjustment means 330, such as manually proceeding the operation of the screw jack.

A vibration motor (M) is installed in the vibration beam (200), and the vibration beam (200) transmits vibration generated by the vibration motor (M) to the object to be vibrated through the vibration rod (400). The vibration beam 200 is installed on the support frame 100 while being supported by the elastic support 300 as described above so that vibration can be efficiently performed.

A guide body 130 may be further installed on the support frame 100. The guide body 130 guides the vibration beam 200, which is vibrated by the operation of the vibration motor M, to move up and down to prevent the vibration beam 200 from being separated from the support frame 100.

The guide body 130 is composed of a guide plate 131 and a fixing plate 132 formed at right angles thereto. When the fixing plate 132 is fixed to the upper horizontal flange 122 of the wall plate 120, the guide body As 130 is installed on the support frame 100, the guide plate 131 is installed in a shape extending upward from the vertical web 121.

In addition, in relation to the installation position of the guide plate 131 in the longitudinal direction of the support frame 100, when the vibration beam 200 is installed on the support frame 100, the diaphragm 210 installed in the vibration beam 200 is vertically The guide plate 131 must be installed at the position where it moves. Thereby, both ends of the diaphragm 210 move up and down along the surface of the guide plate 131 so that the vibration beam 200 does not incline back and forth so that the vibration beam 200 can vibrate efficiently, and As described above, the guide plate 131 has the structure of a rectangular tubular body accommodating the elastic support 300 together with the diaphragm 210 to prevent separation of the elastic member 310.

The vibration rod 400 that transmits the vibration of the vibration beam 200 to the object to be vibrated is installed in a structure mounted on the vibration beam 200.

At this time, it is necessary to minimize the loss of vibration energy that may occur during the process of transmitting the vibration of the vibration beam 200 to the vibration rod 400. This is the same in the process of transmitting the vibration from the vibration rod 400 to the object to be vibrated.

To this end, the vibration rod 400 may be fixed to the vibration beam 200 by welding, but the removal of the concrete compaction device 10 may be a bit cumbersome. Therefore, by installing the mounting plate 220 provided with the mounting groove 221 on the upper surface of the vibration beam 200, and mounting the vibration rod 400 on the mounting piece 220, the vibration rod 400 is 200) can be prevented from sliding.

This point is also applied between the vibration rod 400 and the object to be vibrated as it is. That is, it is possible to integrate the vibration rod 400 and the object to be vibrated through welding, and install a mounting roller 410 provided with a mounting groove 411 on the outer periphery so that separation between them can be easily performed in the future. The to-be-vibrated body may be mounted on the roller 410. The mounting roller 410 prevents the vibration rod 400 from being separated from the mounting groove 411 even if the vibration rod 400 rotates itself during the vibration process.

Reference numeral '230' is a traction ring for lifting the vibration beam 200.

6 to 12 illustrate each process of constructing an underground continuous wall using the concrete compaction device 10 described so far. The construction method of the underground continuous wall by this is a) the guide wall (20) installation step, b) the trench (30) formation step, c) the concrete compaction device (10) installation step, d) the reinforcing bar net (40) insertion step, e ) The connection step of the reinforcing bar network 40 to the concrete compactor 10, f) the concrete (C) pouring and compacting step, g) the concrete (C) removing the compaction device, and each of these steps is more specific. Explained as follows.

a) guide wall 20 installation step (Fig. 6);

In order to build the underground continuous wall, guide walls 20 are installed around both sides of the trench 30 to be formed through the following steps.

The guide wall 20 protects the ground around the trench 30 so that the trench 30 does not collapse due to the impact of the excavator during the excavation process, and serves as a support for the tremi pipe 50 to be installed in the future, and is made of reinforced concrete or steel frame. Build with

b) forming a trench 30 (Fig. 7);

The trench 30 is formed in the ground by performing excavation by attaching a trench 30 cutter to the excavation equipment.

The excavation proceeds while injecting a stabilizing liquid 31 such as bentonite into the interior so that the empty wall does not collapse, and the stabilizing liquid 31 must always be kept higher than the groundwater level during the working process.

c) concrete compaction device 10 installation step (FIG. 8);

The concrete compaction device 10 of the present invention is installed for compaction of concrete (C) to be poured in the future.

First, a pair of main bodies of the concrete compactor 10 are positioned long in the longitudinal direction of the trench 30 so as to face each other on both sides of the ground on which the trench 30 is formed.

Next, in the next step, the height of the vibration beam 200 in consideration of the height at which the hook 41 installed on the top of the reinforcing bar 40 is positioned for lifting of the reinforcing bar 40 to be inserted into the trench 30 Adjust. For example, it is preferable to sufficiently lower the height of the vibration beam 200 to facilitate the operation of inserting the vibration rod 400 mounted on the vibration beam 200 into the inside of the hook 41, and at this time, the height adjustment means 330 It can be used efficiently.

d) reinforcing bar network 40 insertion step (Fig. 9);

When the installation work on the main body of the concrete compaction device 10 excluding the vibration rod 400 is completed, the reinforcing bar network 40 manufactured in advance is inserted into the trench 30.

Of course, prior to this, it is necessary to remove the slime mixed in the stabilizer 31 through a desanding operation so that the quality of the concrete (C) of the constructed underground continuous wall does not deteriorate.

The hook 41 installed on the upper part of the reinforcing bar 40 serves as a lifting ring, facilitating the operation of inserting the reinforcing bar 40 into the trench 30, and concrete poured into the trench 30 in the future. In addition to supporting the reinforcing bar network 40 embedded therein until (C) is hardened, it functions as a medium for transmitting vibrations by the concrete compaction device 10 to the entire reinforcing bar network 40.

e) Step of connecting the reinforcing bar network 40 to the concrete compaction device 10 (FIG. 10);

When the reinforcing bar 40 is inserted into the trench 30, the vibrating bar 400 is inserted into the hook 41 installed on the reinforcing bar 40, and both ends of the vibrating bar 400 are vibrating beams. It is mounted on the top of (200).

When the vibration rod 400 is placed in the correct position of the vibration beam 200, the lower surface of the hook 41 is in close contact with the upper surface of the vibration rod 400 by adjusting the vibration beam 200 upward using a height adjusting device. do. Thereby, the reinforcing bar 40 has a state suspended by the vibration bar 400. The vibration rod 400 installed in this way is maintained until the concrete (C) poured into the trench 30 is cured and supports the reinforcing bar network 40.

Next, between the vibration beam 200 and the vibration rod 400 and between the vibration rod 400 and the hook so that the vibration generated by the operation of the concrete compactor 10 can be efficiently transmitted to the reinforcing bar network 40 (41) Fix the gap.

Various means, such as welding or clamping, can be used for fixing them, but it should not interfere with future separation work. As described above, when the vibration beam 200 is provided with a mounting plate 220 having a mounting groove 221, and the vibration rod 400 is also provided with a mounting roller 410 having a mounting groove 411 In a state where the hook 41 is inserted into the mounting groove 411 of the mounting roller 410, both ends of the vibration rod 400 are mounted in the mounting groove 221 of the mounting piece 220 installed on the vibration beam 200. By inserting it in, it is possible to omit a separate operation such as welding.

f) concrete (C) pouring and compacting step (Fig. 11);

When the installation of the reinforcing bar network 40 to the inside of the trench 30 is completed, and the connection work of the reinforcing bar network 40 to the concrete compaction device 10 is completed, the tremi pipe 50 is placed inside the trench 30. Install and use it to pour concrete (C).

The pouring of the concrete (C) is performed while the tremi tube (50) is pulled out, and at this time, the vibration motor (M) is operated to generate the vibration in the vibration beam 200 of the concrete compactor (10), and the vibration rod (400). ) And through the hook 41, the entire reinforcing bar network 40 is vibrated. Accordingly, the concrete (C) compaction for the entire interior of the trench 30 is simultaneously performed, and even if the reinforcing bar network 40 is formed very densely, tight concrete (C) filling can be achieved.

When the pouring of the concrete (C) is completed and the compaction is made sufficiently, the operation of the concrete compaction device (10) is stopped, and the concrete (C) in a state in which the reinforcing bar network (40) is supported by the vibration bar (400). ) To be cured.

g) step of removing the concrete compactor 10 (FIG. 12);

When the predetermined strength set in the concrete (C) is expressed, the hook 41 is cut from the reinforcing bar network 40 and the concrete compactor 10 is removed.

The construction of the underground continuous wall is completed by repeating each of the above processes.

In the above, the present invention has been described in detail with reference to specific embodiments, but the embodiments are only examples for making the present invention easier to understand, so those of ordinary skill in the art will have the scope of the technical idea of the present invention. It is obvious that it will be possible to implement this in various ways. Therefore, such modified examples will be said to belong to the scope of the present invention as described in the claims.

10; Concrete compactor 20; Guide wall
30; Trench 40; Rebar mesh
41; Hook 50; Tremi Hall
100; Support frame 110; Bottom plate
120; Wall plate 121; Vertical web
121a; Work opening 122; Upper horizontal flange
123; Lower horizontal flange 124; Reinforcement plate
125; Connecting plate 130; Guide body
131; Guide plate 132; Fixed plate
200; Vibration beam 210; Diaphragm
211; Upper fixing protrusion 220; Deferment
221,411; Mounting groove 230; Tow hook
300; Elastic support 310; Elastic member
320; Support plate 321; Lower fixing protrusion
330; Height adjustment means 400; Vibration rod
410; Mounting roller M; Vibration motor
S; Accommodation space C; concrete

Claims (10)

As a device to compact the poured concrete when constructing a reinforced concrete structure in the ground,
A support frame 100 provided with an accommodation space S, a vibration beam 200 installed to enable vibration in the support frame 100, and a vibration motor M installed in the vibration beam 200 , Consisting of a vibration rod 400 that is mounted on the vibration beam 200 and transmits the vibration of the vibration beam 200 to the body to be vibrated,
The support frame 100 is made of a bottom plate 110 and a wall plate 120 installed on both sides of the bottom plate 110 to form an accommodation space (S),
Concrete compaction device for an underground structure, characterized in that the wall plate 120 is provided with a working opening (121a). The method of claim 1,
An elastic support 300 is installed in the receiving space S, and the vibration beam 200 is supported by the elastic support 300. The method of claim 2,
The elastic support 300 is an underground structure comprising an elastic member 310 installed in close contact with the lower surface of the vibration beam 200 and a support plate 320 fixedly supporting the lower portion of the elastic member 310 Concrete compactor. The method of claim 3,
A concrete compaction device for an underground structure, characterized in that a height adjustment means 330 for adjusting a fixed position of the support plate 320 is installed under the support plate 320. The method of claim 3,
An upper fixing protrusion 211 is provided on the lower surface of the vibration beam 200, and a lower fixing protrusion 321 is provided on the upper surface of the support plate 320, so that the upper and lower ends of the elastic member 310 are upper fixing protrusions 211 ) And a concrete compaction device for an underground structure, characterized in that the position is fixed by the lower fixing protrusion 321. delete The method of claim 1,
Concrete compaction device for an underground structure, characterized in that the guide body 130 for guiding the vertical movement of the vibration beam 200 is installed on the wall plate 120. The method of claim 1,
Concrete compaction device for an underground structure, characterized in that a mounting piece 220 provided with a mounting groove 221 is installed on the upper surface of the vibration beam 200 to prevent sliding of the vibration rod 400. The method of claim 1,
A concrete compaction device for an underground structure, characterized in that the vibration rod 400 is provided with a mounting roller 410 provided with a mounting groove 411 at the outer periphery to fix the position of the vibrating object. As a method of constructing an underground continuous wall by using the concrete compaction device for an underground structure according to any one of claims 1 to 5 and 7 to 9,
a) installing the guide wall 20;
b) forming a trench 30 in the ground;
c) installing the concrete compaction device 10 on both sides of the trench 30;
d) inserting a reinforcing bar mesh 40 having a hook 41 thereon in the trench 30;
e) fixing the hook 41 to the vibration rod 400 of the concrete compactor 10;
f) pouring concrete (C) into the trench (30) while vibrating the reinforcing bar network (40) using the concrete compaction device (10);
g) Step of removing the concrete compaction device 10; Construction method of the underground continuous wall, characterized in that consisting of

Images