KR100767628B1 - construction machine forming wall in underground - Google Patents

Abstract

The present invention relates to an underground wall construction apparatus for constructing a continuous wall in the ground by discharging by mixing with solidified materials, such as soil cement, bentonite, and the like in the earth and sand generated by excavating the vertical tunnel on the ground and excavating the ground in the lateral direction again. The device is arranged to move up and down vertically to the mast of the self-propelled crane, the lower end of the connection tube is connected to the mounting panel is installed infinitely attached to the outer periphery of the infinite number of cutter bits, mixing bars, etc. The excavation assembly that can excavate the ground by the rotational drive of the chain and pour the walls continuously while moving in the lateral direction, and is disposed on the lowermost side between the pair of mounting panels to excavate the vertical tunnel on the ground. 2 rows of said endless chains between a pair of 2 sets of hydrolic mill and the said mounting panel A driven sprocket and a drive sprocket disposed twos 1 pair 2 to be circular driving, and be installed on the inner side of the mounting panel to the configuration with the guard to the supported so as to circulate the endless chain running is not shaken to the left or right.

Underground continuous wall, continuous earth wall, underground excavation wall forming,

Description

Construction machine forming wall in underground

BRIEF DESCRIPTION OF THE DRAWINGS The figure which shows the example of this apparatus mounted on the normal self-propelled crane.

2 is an exploded perspective view showing the main configuration of the present invention.

Figure 3 is an assembled bottom view of the device of the present invention.

Figure 4 is an assembled front view of the device of the present invention.

5 is a schematic view for explaining the underground excavation situation according to the present invention.

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

2: self-propelled crane 4: mast

6: connecting body 8: excavating assembly

10: mounting panel 12: hydroric mill

14: driven sprocket 16: driven sprocket

18: Infinite Chain 20: Bit

22: mixing bar 24: fluid supply line

26, 30: hydraulic motors 28, 32: output shaft

34: bushing 36: guard

280, 320: bushing seat 282: wheel attachment surface

322: sprocket attachment surface

Japanese Patent Laid-Open No. 5-280043, Japanese Patent Laid-Open No. 11-71751, Japanese Laid-Open Patent 2001-323456, Korean Laid-open Patent No. 10-2006-0001953,

The present invention relates to an underground wall construction apparatus capable of collectively constructing a continuous wall in the ground of the point where it is necessary to plan the ground reinforcement by constructing a continuous wall in the ground in the foundation stage of civil engineering or building construction.

In case of constructing continuous wall in the ground, in general, through the process of rotating the rod with the screw or wing plate upright in the vertical direction, through the process of injecting and drawing the ground, stirring the mixing material and soil of the original ground In the underground, a columnar or overlapping columnar wall is constructed. However, this method has a problem in that it is formed by the ground improvement body which differs according to the depth of the ground according to the characteristics of the strata, and the columnar-shaped wall remains a fragile part in which the overlapping part cannot endure the earth pressure.

There is also known a quadrilateral jet method in which the solidified material is rocked from side to side while high-pressure spraying with a spray nozzle attached to a tip of a special shape to cause the solidified material to form a predetermined wall surface. According to the characteristics of the ground is formed by different ground improver, and the thickness of the wall surface formed through the process of excavation-high pressure spray-stirring is not constant, there is a problem that does not endure soil pressure well.

As another example, if the ground is excavated to a certain depth and constructed by constructing concrete formwork, or advanced while digging vertically into the ground with an auger drill, the next work tank is to cast concrete into the excavated hole so that the wall The method of making it form is also performed. However, this method is inevitable that seams are created because the walls constructed in the ground are not continuously formed, and water leaks through these seams, which causes the ground to become weak, and the process is complicated and the air is long. It can not be called.

In order to solve the above-mentioned problems, a method and an apparatus for continuously forming walls in the ground have been recently developed and implemented in various structures.

For example, Japanese Unexamined Patent Publication No. 5-280043 frequently has a guide post vertically disposed at the end of a boom installed in a vehicle, and an infinite chain which is cyclically driven between a driving sprocket and an idle sprocket at the upper and lower ends of the guide post. This infinite chain discloses a ground continuous wall excavation device having a number of cutter bits and bits on its outer periphery.

The disclosed apparatus is to excavate the ground first, and then move laterally to mix the solidified material in the excavated soil to be constructed as a wall, so that the construction of the continuous wall can be constructed in the ground.

However, since the disclosed excavation device is a structure that excavates the ground and the ground with one line, which is an infinite body, the solidified material and the soil do not mix well, and there is a problem in the rigidity of the wall constructed in the ground.

In addition, since the endless chain is a structure that combines vertical tunnel excavation and lateral movement in one row, the endless chain receives a lot of load from the ground during excavation and has a disadvantage of slow construction progress.

In addition, Japanese Patent Application Laid-Open No. 11-71751 discloses a method of entering a stirrer which is operated by a crane in an excavation ball, and mixing the stirrer while injecting the soil cement into the excavation ball to build a soil cement wall in the ground. However, this method does not have the function of quickly constructing a continuous wall in the ground because it is installed by putting a stirrer in the previously excavated hole, and because the stirrer cannot move sideways of the ground.

Japanese Patent Laid-Open No. 2001-323456 also discloses an apparatus capable of constructing a continuous wall in the ground.

The disclosed device is a frame attached to the lower end of the stretchable post, and a plurality of sets of endless chains having numerous excavation stirring blades are arranged side by side, and a fluid discharge port is provided inside the frame.

However, the excavation device of such a configuration is also a device for constructing walls in the ground while excavating the ground vertically and moving in the lateral direction depending on one endless chain. Due to the configuration that serves as a large load on the excavation, there is a disadvantage that slow construction progress accordingly.

Excavation stirring device disclosed in Republic of Korea Patent Publication No. 10-2006-0001953, two infinite chains are arranged in pairs, and the endless chains are rotated in a direction facing each other, so that the excavated soil is infinite While circulating and discharged through the chain is mixed with the solidified material supplied through the solidified fuel injection device provided between the both endless chains is configured to make a continuous wall in the ground.

This device is superior in the surface excavation effect compared to the one-line endless chain configuration described above. However, even when two lines of endless chains face each other, it is not possible to smooth the excavation of the tunnel in the vertical direction. Therefore, the problem of the large load on the ground and slow progress of construction is not solved.

The present invention is to excavate the vertical tunnel on the ground and move sideways again to mix the solidified materials such as soil cement, bentonite, etc. in the excavated soil to build a continuous wall in the ground, it is possible to quickly excavate the vertical tunnel The aim is to significantly improve the speed of the construction process by providing the construction of underground wall construction.

The present invention for realizing the above object is to arrange the connecting tube to move up and down vertically to the mast of the self-propelled crane, the lower end of the connecting tube is mounted on the outer periphery of the endless chain is attached to the infinite number of cutter bits, mixing bars, etc. In the underground wall construction device consisting of an excavation assembly that can be connected to excavation of the ground by the rotational drive of the endless chain and to move the wall in the lateral direction continuously, facing the bottom between the pair of mounting panels And a pair of two sets of hydraulic mills arranged to dig a vertical tunnel on the ground, and a pair of sets of driven sprockets and driving sprockets arranged in a pair of pairs so that the endless chain can be circulated in two rows between the mounting panels, and the mounting panel. Is installed inside of the endless chain to run circularly without swinging from side to side It becomes the structure with the guard supporting.

In addition, in the above-described configuration, the apparatus of the present invention may be set so that the replacement intervals of the hydrostatic mills arranged in the two pairs in the mounting panel are narrower than the replacement intervals of the endless chains arranged in the two pairs.

In addition, in the above-described configuration, the apparatus of the present invention is such that the rotational speed relationship of the infinite chain disposed in the pair of the inside of the mounting panel is set so that the infinite chain ahead of the traveling direction rotates faster than the infinite chain behind the traveling direction. It is good.

Hereinafter, the present invention will be described in detail with reference to preferred embodiments according to the accompanying drawings.

The apparatus according to the present invention is an excavation assembly (8) attached to the lower end of the connecting pipe (6) which is arranged to be able to lift and move vertically in parallel to the mast (4) of the self-propelled crane (2) as shown in FIG. It is composed.

The self-propelled crane 2 may be any one that can be moved by the power of its own engine in the same way as a normal crane, and the connecting pipe 6 uses a structure that can be connected in series to the excavation depth.

The excavation assembly 8 constitutes the substance of the apparatus according to the present invention, and a pair of mounting panels 10 are disposed to face each other with a stud tube 9 to which the stud bolts are inserted and connected as shown in FIG. 2. It remains fixed.

Between these pairs of mounting panels 10, a pair of pairs of hydraulic mills 12 are arranged on the lowermost side, and in the adjacent positions, the driven sprockets 14 and the driving sprockets 16 face each other in pairs. It is installed and is made to circulate through the endless chain 18 extended to the outer periphery.

On the outer circumference of the endless chain 18, a bit 20 for underground excavation and a mixing bar 22 for mixing the excavated soil with solid materials are attached to the outer periphery of the infinite chain 18, and the hydraulic mill 12 and the driving sprocket ( A fluid supply line 24 for supplying hydraulic pressure as power to 16 is laid on the inner side of one mounting panel 10.

The fluid supply line 24 may be isolated and protected by a cover so as not to interfere with the soil.

The hydraulic mill 12 is driven by a hydraulic motor 26 located therein.

The output shaft 28 of the hydraulic motor 26 has a shape with a bushing seat 280 of slightly larger diameter and a wheel attachment surface 282 having an outer diameter corresponding to the central through hole of the hydraulic mill 12. .

Similarly, the drive sprocket 16 is also driven to rotate by the force of the hydraulic motor 30 accommodated therein, and the output shaft 32 of the hydraulic motor 30 is also the hydraulic pressure of the hydraulic mill 12 described above. Similarly to the motor 26, the bushing seat 320 and the sprocket attachment surface 322 having an outer diameter corresponding to the central through hole of the drive sprocket 16 are formed.

Needless to say, the hydraulic pressure supplied through the fluid supply line 24 is provided to the hydraulic motors 26 and 30 to be a power for driving them to rotate.

In the present invention, the hydraulic mill 12, the driven sprocket 14, and the drive sprocket 16 are arranged coaxially in a pair, and the bushing 34 is interposed therebetween so that the bushing seat 280 ( 320 is rotatably supported, respectively.

Between the pair of endless chains 18 arranged oppositely, the lower end portion of the connecting tube 6 is positioned to inject the solidified material as in the conventional apparatus.

FIG. 3 shows an example in which the hydraulic mill 12 is arranged in pairs of two via a bushing 34.

The bushing 34 is supported by the bushing seat 280 of the hydraulic motor 26 installed inside the hydraulic mill 12 located at both sides in a free contact state. Does not cause disability

In addition, since the hydrodynamic mill 12 is fixedly supported by the wheel attachment surface 282 formed on the output shaft 28 of the hydraulic motor 26, the hydrodynamic mill 12 is driven to rotate regardless of the bushing 34.

Such a rotation drive mechanism is similarly applied to the drive sprocket 16 arranged in pairs of two.

4 is a front view of the excavation assembly 8 described above. In the present invention, the convex spacing W2 between the endless chains 18 arranged in two rows of the central axial convex spacing W1 of the hydraulic mill 12. By setting it narrower, the influence of the load applied to the endless chain 16 is reduced.

In addition, the hydroelectric mill 12 disposed at a narrow replacement interval W1 is dug into a wide range when excavating a vertical tunnel from the ground, so that the infinite chain 18 can easily enter the ground.

In addition, the guard 36 may be disposed on the circulation path of the endless chain 18 arranged in two rows side by side. The guard 36 serves to support and guide the endless chain 18 so that it does not swing from side to side during the circular drive.

It is a schematic diagram explaining the example which builds a wall, excavating underground with the apparatus of this invention of the structure mentioned above.

The device of the present invention is responsible for the excavation of the vertical tunnel to the ground while the two pairs of the hydraulic mill 12 located at the lowermost side of the excavation assembly 8 are driven to rotate outwardly from each other. Infinite chains 18 arranged in groups are in charge of the lateral excavation of the ground, while the drive sprocket 16 is rotationally driven inward to each other.

The reason why the rotational directions of the hydrostatic mill 12 and the endless chain 18 are set in the opposite direction is that the soil excavated by the hydroelectric mill 12 enters between both endless chains 18, and thus, the lateral direction of the ground. This is to prevent entanglement of the construction of underground walls by entanglement with soil derived from excavation.

The lowermost hydroelectric mill 12, unlike the endless chain 18 when digging a vertical tunnel in the target strata, easily penetrates the gravel layer, which is difficult to penetrate, and can excavate deeply to the rigid strata to support the bottom of the continuous wall. It is easy to socket-in to.

Further, since the excavation is performed in a wider range than the array widths of both endless chains 18, the cutter bit of the endless chains 18 does not come into contact with the strata in the vertical direction.

Of both infinite chains 18, the infinite chain 18 placed in the forward direction indicated by the arrow A in the drawing excavates the original soil, and agitates between the upper and lower layers, and the resulting soil is a homogeneous mixture. In addition, the endless chain 18 disposed in the rear of the advancing direction evenly mixes the solidified material injected through the continuous pipe 6 to the excavated and stirred raw soil soil to form a homogeneous wall in which the entire layers are evenly mixed. To be.

On the other hand, the rotational speed relationship between the two endless chain 18 is preferably set to rotate at twice the speed of the endless chain 18 placed in the forward direction of the infinite chain 18 placed behind it, so When placed, the soil of the original ground scraping off the ground wall can be sufficiently mixed with the solidified material in the inside of the mounting panel 10.

In more detail, in the present invention, when the excavation assembly 8 is excavated while moving in the lateral direction of the ground, the soil of the original ground is agitated immediately by the front endless chain 18 in the advancing direction, and Some enter the interior of the mounting panel 10 by the endless chain 18, and some enter through the gap between the endless chain 18.

Soil entering into the mounting panel 10 is discharged to the rear of the advancing direction while being mixed with the solidified material, thereby forming a continuous wall in the ground.

In the present invention, as the solidifying material, quicklime, soil cement, bentonite, and the like may be used. In the case of underground continuous walls requiring strength, cement is used and bentonite is used as the main solidifying material in the case of the order.

According to the device of the present invention, it is possible to construct a continuous wall of a constant thickness in the ground, and to form a homogeneous mixture of the layers of the ground layer by stirring up and down along the vertical direction, strata with different physical and mechanical properties. In terrains with a rigid support layer, the bottom of the continuous wall can be constructed close to the support layer so that the load on the top can be transferred to the support layer.

In addition, if it is necessary to prevent the flow of the ground layer by groundwater, leachate, etc., such as in the case of a sand layer or a landfill, it can function as a barrier wall to a solid layer with a low permeability coefficient. Construction is also possible.

The present invention, which can be particularly suitably used, can be applied to temporary earth wall structures in parallel with H-beam pouring, is applicable to lattice construction for ground improvement of soft ground, and can be applied to existing river banks. Wall formation, and protection wall placement through the construction of leachate barrier walls in waste treatment plants, and the construction of continuous sloped walls to cut slopes in soft ground.

The scope of application of the present invention is ground continuous wall by soil cement, ground improvement by grid-like soil cement wall, stabilization of excavation wall, excavation slope, and the like. Specific embodiments include earth temporary facilities, ground improvement of soft ground, waste It may be arranged as a leachate barrier wall of a landfill, an impermeable barrier wall placed in a soft ground, an excavated slope wall of a soft ground, an impermeable barrier wall of a conventional dyke, and the like.

Claims (3)

The connecting tube is arranged to move up and down vertically to the mast of the self-propelled crane, and the lower end of the connecting tube is connected to a mounting panel having a pair of endless chains with a plurality of cutter bits and mixing bars attached to the outer periphery thereof. In the underground wall construction device consisting of an excavation assembly for excavating the ground by the rotational drive of the excavation and pouring the wall continuously while moving in the lateral direction, Hydroelectric mills arranged in pairs and two pairs to be disposed on the lowermost side between the mounting panel and to excavate a vertical tunnel on the ground; A pair of two driven sprockets and a drive sprocket for supporting the endless chain in two rows in a circumferential manner between the mounting panels; And a guard provided to the inside of the mounting panel and configured to support the endless chain to circulate without moving from side to side. 2. The underground wall according to claim 1, wherein an opposing interval in the direction of the central axis of the hydroelectric mill arranged in the pair of opposing pairs in the mounting panel is smaller than an opposing chain of the endless chain arranged in parallel in two rows. Construction device. 2. The underground wall construction apparatus according to claim 1, wherein the infinite chain disposed in two rows in parallel to the inside of the mounting panel is configured such that the infinite chain in front of the traveling direction is driven to rotate faster than the infinite chain behind the traveling direction.

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