JPH05156640A - Digging hole forming for constructing thin film wall - Google Patents

Abstract

PURPOSE:To obviate the need of connecting an excavator to an elevating device or to an auger driving device by an opertor's going up a leader at an elevated spot so as to perform digging work safely for that and to markedly improve the work efficiency by connecting both devices to each other on the ground. CONSTITUTION:An excavator 34 is previously laid down on the ground, an elevating device 14 elevated along a leader 13 is lowered near the ground, and in such a condition, the excavator 34 is connected to the elevating device 14 in such a manner as to freely rotate on the ground. In such a condition, the elevating device 14 is raised to erect the excavator 34 and erect the same upright along the leader 13. After that, in a position where the excavatar 34 is settled, the excavator 34 is connected to the elevating device 14 in such a manner as to be immobile, and in such a condition, digging work is continued.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention forms an excavation hole in the ground to form an underground wall body such as an earth retaining wall, a water blocking wall, or an outer peripheral wall of an underground structure such as water and sewer. On how to do.

[0002]

2. Description of the Related Art At present, it is generally cylindrical to excavate underground to construct underground wall bodies such as earth retaining walls, water stop walls, and outer peripheral walls of underground structures such as water and sewers. An excavation method for column wall construction is used in which piles are continuously formed.

According to this conventional excavating method, circular holes are excavated in the ground adjacent to each other by a so-called earth auger, and cylindrical cast-in-place piles are continuously formed on the excavated holes.

As described above, according to the conventional excavation method, since circular excavation holes are continuously formed in the ground in the lateral direction, the underground wall body to be driven into the excavation hole is naturally a columnar pile. It becomes continuous and becomes thick, and a so-called multi-axis type earth auger is used to form a circular excavation hole, so the device becomes large and a wide work site is required for excavation work. was there.

In the construction of the underground portion of the building in the urbanized dense area, the construction can be easily performed in a narrow site, and the width (wall thickness) of the underground wall body such as the retaining wall is made as thin as possible to make the land more Although it is requested to use it effectively, the conventional excavation method for column-row wall construction has a limit in reducing the width of the underground wall, and the equipment is large in size to increase the site area. There was a difficulty that I needed.

[0006]

As described above, in the conventional excavation method for forming column-row walls, there is a limit to the width reduction of the underground wall body formed by this method. Therefore, the present invention does not use the above-mentioned method, but enables the width of the underground wall to be remarkably reduced as compared with the conventional method, and the drilling hole formation for forming a thin-film wall body which enables safe and easy operation. The purpose is to propose a method.

[0007]

The present invention for attaining the above-mentioned object is, in the case of the present invention, provided with the reference numerals shown in the embodiments. And a pair of endless chain saws 4a and 4b suspended in parallel between the front and rear double panels 2 and 3 of the thin width frame body 1, The excavating rotors 9a and 9b provided at the tip of the frame body 1 and the pair of connecting portions 15 provided at the upper end of the thin frame body 1
The excavator body 3 having a front and rear width formed into a vertically long rectangular shape including a connecting bracket 15 having a and 15b and having a thin front and rear width.
4, the excavator body 34 is laid down on the ground in advance, and the elevating device 14 that moves up and down along the leader 13 is lowered near the ground. In this state, the connecting bracket 15 of the excavator body 34 is moved up and down. One of the pair of connecting portions 15a and 15b is connected to the device 14
The excavator body 34 is rotatably connected by this, and by raising the elevating device 14 in this state, the excavator body 34 is made to stand upright along with the leader 13, and then the upright excavator body 34 is lifted. Then, the excavation work is performed by sinking the excavation machine body 34, and the connecting bracket 15 of the excavation machine body 34 is attached to the lifting device 14 at the position where the excavation machine body 34 is in the middle of the subsidence or at the most submerged position.
The excavation machine body 34 is non-rotatably connected by the other connecting portion 15b, and the excavation work is continued in this state.

According to the second aspect, the pair of endless chains 4a, 4b and the pair of excavating rotors 9a, 9b.
By vertically rotating b and b independently of each other, verticality is maintained during the subsidence of the excavator body 34, and therefore, for forming a thin film wall body corresponding to the outer diameter of the excavator body 34 in the ground. The method comprises a method of forming an excavation hole P for forming a thin film wall body.

Further, in the third aspect, the excavator body 1
The method comprises a method for forming a drill hole for forming a thin film wall body, in which cement milk or muddy water is injected into the drill hole P at the time of sinking or pulling.

[0010]

According to the first aspect of the present invention, the excavator body 34 can be rotatably connected to the elevating device 14 by the connecting bracket 15 in a state where the excavator body 34 is laid down on the ground. 13 can be installed upright at a high place, and the excavator body 34 can be non-rotatably connected to the elevating device 14 during the initial formation of the excavation hole. The excavation work can be continued while being firmly supported by 14.

The endless chainsaws 4a and 4b
The endless chainsaws 4a and 4b are obtained by rotating the excavation rotors 9a and 9b to excavate the ground.
The excavator body 34 supporting the digging hole gradually sinks into the ground to form an excavation hole P having an inner diameter and a shape substantially corresponding to the outer diameter of the excavator body 34.

According to the second aspect of the present invention, if the excavation machine body 34 tends to shift to the left or right during the excavation and the verticality cannot be maintained, the endless chain saws provided in parallel with each other. The verticality of the excavation machine body 34 in the excavation direction can be maintained by independently adjusting the rotation directions of 4a and 4b to the clockwise direction or the counterclockwise direction, respectively.

According to the third aspect of the present invention, cement milk or muddy water is introduced into the excavation hole P while the excavation hole P is formed by the invention of the first aspect to prevent collapse of the excavation hole P. The work for forming cast-in-place piles can be performed quickly. By introducing cement milk or muddy water at the same time during the excavation, it is possible to exert a kind of lubricating action and contribute to speeding up the excavation work.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the entire usage state of an embodiment of the present invention, in which a crane vehicle 12 supports a leader 13 in an upright state, and an elevating device 14 is attached thereto. The excavator body 34 is connected to the elevating device 14 by the connecting bracket 15, and the elevating device 14 supports the excavator body 34 in an upright state along the leader 13, whereby excavation work is performed. The details will be described later.

As shown in FIGS. 2 and 3, the excavator body 34
The thin frame body 1 is composed of a vertically long rectangular front panel 2 and a rear panel 3, and a space holder 16 made of H-shaped steel or bolts is interposed between the panels 2 and 3. The panels 2 and 3 are integrally fixed to each other with a required space provided therebetween. Therefore, the excavator body 34 has a vertically long rectangular front shape and a thin front and rear width. Between the two panels 2 and 3 of the thin frame body 1, a pair of drive sprockets 5a and 5b are mounted on the upper side thereof in parallel with each other as shown in FIG. 2, and a pair of driven sprockets 6a are similarly mounted on the lower side thereof. ，
6b are installed side by side in parallel and both sprockets 5
a, 6a, 5b, 6b over the transmission chains 4a, 4
b is suspended, and the excavating blades 7 are attached to the transmission chains 4a, 4b at appropriate intervals to form endless chain saws 4a, 4b. As shown in FIG. 3, the drive sprockets 5a and 5b are provided with drive motors 17a and 17b, respectively.
The drive motors 17a and 17b independently rotate a and 5b, respectively.

Both panels 2 and 3 are divided into upper side panels 2a and 3a and lower side panels 2b and 3b, respectively, and as shown in FIG. Therefore, both upper and lower panels 2a, 3a and 2b,
3b is movable only up and down. The upper and lower panels 2a, 3a and 2b, 3b are connected by a pair of buffer connecting devices 10a, 10b. The buffer coupling devices 10a and 10b include a cylinder body 18a and a piston 18
b, a rod 18c, and a spring 18d that presses the piston 18b, the rod 18c is normally in an extended state.

A pair of cement milk or muddy water introducing pipes 11 is provided between the front and rear panels 2 and 3 from the upper portion to the lower end portion thereof, and as shown in FIG. 3, the upper opening 11a thereof is flexible for introducing. The lower end opening is connected to the pipe 19 and communicates downward between the pair of front and rear excavation rotors 9a and 9b.

An angle determining motor 20 is provided at the upper end of the thin width frame main body 1 to horizontally rotate the thin width frame main body 1 with its center as a fulcrum to set the horizontal angle of the thin width frame main body 1. At the same time, a connecting bracket 15 is attached to the upper portion thereof, and the bracket 15 is formed with a pair of connecting portions 15a and 15b formed of pin holes or the like. Further, a chuck device 21 is provided at the upper side edge of the thin frame body 1,
An engaging device 22 is provided on the side edge of the lower end of the thin frame body 1, and its role will be described later.

As shown in FIG. 3, a ridge portion 32 is provided over the entire length in the longitudinal direction of the rear central portion of the thin frame body 1,
As shown in FIG. 1, the ridge 32 is supported by a support arm 33 that can be divided into two and is provided on the crane vehicle 12 or the leader 13 to prevent the thin width frame body 1 from swinging when moving up and down.

FIG. 4 shows the driven sprockets 6a, 6b on the lower side of the thin frame body 1 and the transmission chain 4 suspended thereon.
FIG. 3 is a cross-sectional plan view of a and 4b and excavation rotors 9a and 9b, in which driven shafts 8 are formed on the driven sprockets 6a and 6b.
a and 8b are integrally provided so as to project in the front and rear, while the excavation rotor 9
The central portions of the a and 9b are cylindrical portions 23a and 23 having a square hole shape.
b and the metal bearings 24a and 24b on the outer peripheral side thereof are integrally projected, and the cylindrical portions 23a and 23b are fitted to the support shafts 8a and 8b, so that the driven sprockets 6a and 6b and the excavation rotors 9a and 9b are connected to each other. Is the metal bearings 24a, 24
b and the metal bearings 25a and 25b on the side of the thin width frame main body are supported by the thin width frame main body 1, and the retaining pins 26a and 26b are inserted over both of them, so that the excavation rotors 9a and 9b are driven by the driven sprockets 6a. , 6b rotate together. When the excavation rotors 9a and 9b are worn or replaced with those having different thicknesses, the retaining pin 2
Excavator rotors 9a, 9b by removing 6a, 26b
Can be easily replaced.

Further, as described above, the pair of left and right endless chainsaws 4a and 4b and the excavator rotor 9 are provided on the excavator body 34.
The purpose of providing a and 9b is not only for the purpose of simply increasing the excavation width, but also for maintaining the verticality of the excavator body 34 at the time of subsidence. That is, when the excavator body 34 is directly advanced in the sinking direction, the drive sprocket 5b and the excavation rotor 9b on the right side rotate clockwise, and the one on the left side rotates counterclockwise. Further, when the excavator body 34 becomes slightly displaced to the left during the excavation, it is sufficient to rotate both the left and right sides in the clockwise direction. Further, when the excavator body 34 is slightly displaced to the right during the subsidence, By rotating counterclockwise on both left and right sides, it is possible to excavate while assembling in a vertical state, and further, not only in the vertical state, but also in the required inclination direction depending on the work conditions at the site. It is possible.

The present invention is constituted as described above, and in order to use it, as shown in FIG. 1, the lifting bracket 14 for mounting the connecting bracket 15 of the thin frame body 1 in the lifting bracket 14 is attached to the reader 13. Connected to the transmission chain 4
a, 4b and the excavation rotors 9a, 9b are rotated to lower the elevating device 14 to excavate the soil mainly by the excavation blade 7 at the tip of the excavator body 34 and the excavation rotors 9a, 9b. The excavator body 34 sinks while forming the An excavation hole P corresponding to is formed. When the excavator body 34 is in the process of sinking, the excavating blade 7 and the excavating rotor 9 at the tip of the excavator body 34 are
When a and 9b collide with a hard object such as rock, the leader 13 is resisted against the resilience of the buffer connecting devices 10a and 10b.
The lower side panels 2b and 3b move upward with respect to the upper side panels 2a and 3a that are suspended by the digging blade 7 and the digging rotor 9.
"a" and "9b" escape from a hard material to prevent a sudden excavation action, thereby preventing damage to these excavation tools.

Next, while the excavator body 34 is being pulled out, cement milk or muddy water is introduced into the tip portion of the excavator body 34 from the cement milk or muddy water introduction pipe 11 to prevent collapse of the excavation hole P and the thin film thereafter. The wall can be formed quickly. The excavator body 34
By introducing the cement milk or the muddy water during the subsidence, the lubricating action in the excavation work at the tip portion of the excavator body 34 is also exerted, and the excavation work can be performed more smoothly.

Then, as shown in FIG. 5, a plurality of steel sheet piles S (see FIG. 9 for the cross-sectional structure thereof) are hung by a wire 30 extending from a sheave 29 (FIG. 1) at the upper end of the leader 13 via a lifting tool 28. The steel sheet pile S is lifted up, and the steel sheet pile S is placed along the side surface of the excavator body 34 as shown in FIG.
The engaging portion 31 (shown by a chain line in FIG. 8) at the lower end of the engaging portion 22 (FIG. 2) provided at the lower end of the thin frame body 1,
The upper end portion of the steel sheet pile S is chucked by the chuck device 21 (FIG. 2) provided on the upper end portion of the thin width frame body 1 to integrally lock the steel sheet pile S on the side surface of the excavator body 34, and in this state. Figure 7
The steel sheet pile S is formed by excavating the excavator body 34 in the ground as shown in FIG.
It will be simultaneously driven into the excavation work and the steel sheet pile S
It is possible to simultaneously perform the setting work of.

FIG. 8 shows a state in which a large number of steel sheet piles S are connected to each other in the excavation hole P, and cement milk is hardened integrally with the inner space and the periphery thereof to strengthen the thin film continuous wall body. T will be formed in the ground.

By the way, since the excavator body 34 is formed vertically long, when it is connected to the elevating device 14, it is lifted by the wire 30 extending from the sheave 29 of the crane vehicle 12, and held upright along the leader 13. It is extremely difficult to go. Even if the excavator body 34 is held upright along the leader 13, in order to connect the excavator body 34 to the elevating device 14, the worker must climb on the leader 13 and perform the connecting work at a high place. Of course, it is extremely dangerous.

In view of this point, the present invention is characterized in that the above-mentioned connecting work is easily performed on the ground.

An example of the lifting device 14 will be described with reference to FIG.
It is held by and can be moved up and down.
Drive sprocket 3 driven by hydraulic motor, etc.
7 and upper and lower guide rollers 38, 39 are provided along the entire length of the leader 13, and a rack chain 40 having both ends fixed to the leader 13 is driven by a sprocket 37 and upper and lower guide rollers 38, 39. By engaging with the drive sprocket 37 through the space between and, and driving the sprocket 37, the elevating device 14 is moved up and down. A connected bracket 41 is integrally provided on the lower side of the apparatus main body, and a pair of upper and lower connected holes 41a and 41b, such as attached holes, are provided in this.

On the other hand, the connecting bracket 15 of the excavator body 34
10 is adapted to fit into the connected bracket 41 as shown in FIG. 10, and the connecting portions 15a and 15b such as a pair of upper and lower mounting holes corresponding to the connected portions 41a and 41b of the bracket 41. Is provided.

As shown in FIG. 11, the method of using the excavator body 34 is set on the ground sideways, and the lifting device 14 is also lowered near the ground. In this state, the upper end portion of the excavator body 34 is properly adjusted. Then, the connecting bracket 15 is fitted to the connected bracket 41 of the elevating device 14 as shown in FIG. 10, and the former connecting portions 15a, 15 are connected.
Of the b, the upper connecting portion 15a and the latter connected portion 41
The connecting bracket 15 is rotatably connected to the connected bracket 41 by a through bolt and a nut or a connecting pin 42 which are fitted together with the upper connecting portion 41a of the a and 41b. This state is shown in Figure 9.
11 and the chain line of FIG. 11A.

By raising the elevating device 14 from this state, the excavator body 34 starts to stand up as shown in B to C of FIG. 11, and at the rising end of the elevating device 14, the excavator body 34 is moved to the leader as shown in FIG. It becomes upright along 13.

When the excavator body 34 is raised in this manner, the sheave 29 of the leader 13 is moved as shown in FIG.
It is preferable to hold the vicinity of the lower end of the excavator body 34 in a suspended state by a wire 30 extending from the.

Therefore, as shown in FIG. 1, the excavator body 34
Ascend as described above from an upright position along the leader 13.
The excavation work is performed by lowering the descending device 14 and driving the excavator body 34.
But the entire length of the excavator body 34 goes underground.
When settled, the upper end of the excavator body 34 is located near the ground.
As shown in FIG.
The connecting bracket 41b on the lower side of the connecting bracket 41 and the connecting bracket
The lower part of the ket 15 and the connecting part 15b are also passed through in the same manner.
And nuts or connecting pins 42
As a result, the lifting device 14 and the excavator body 34 naturally rotate.
It will be immovably and firmly connected, and in this state
Raise the lifting device 14 and pull out the excavator body 34,
And continue excavation work more stably
can do.

At first, the excavator body 34 is attached to the leader 13
When upright along with, the protrusion 32 provided on the rear side of the thin frame body 1 shown in FIG.
Needless to say, if the excavator body 34 is lifted up and down while being supported by No. 3, it will be more stable.

When the excavator body 34 is attached to the leader 13 so as to be able to move up and down in order to form the excavation hole P as described above, an operator climbs to a high place of the leader 13 and the excavator body 3 is mounted.
Since it is not necessary to attach 4 to the leader 13, cutting work can be performed safely and efficiently.

[0036]

According to the first aspect of the present invention, the excavator body is connected to an elevating device for elevating and lowering the leader with the excavator body lying down on the ground, and in this state, the excavator body is supported upright along the leader. Therefore, it is not necessary for the worker to climb the leader to connect the excavator machine with the lifting device or the auger drive device at a high place as in the conventional case, and the excavation work can be performed more safely and the ground excavation work can be performed. The work efficiency can be remarkably improved by connecting the two with.

According to the first aspect of the present invention, since the excavator body has a vertically long rectangular front shape and a thin front and rear width, it is possible to form a drill hole having a narrow front and rear width and a wide lateral width. Therefore, a thin film underground continuous wall can be formed by the excavation hole, and effective utilization of an expensive site can be achieved.

In the second aspect of the present invention, if the excavation machine body tends to shift in the excavating direction from side to side during the excavation and the verticality cannot be maintained, the endless chainsaws provided in parallel with each other can be used. By independently changing the rotation direction to the clockwise direction or the counterclockwise direction, the deviation can be easily corrected, and a drill hole with high verticality can be formed.

In the third aspect of the present invention, cement milk or muddy water is introduced into the drill hole during the formation of the drill hole to prevent the collapse of the drill hole, and at the same time, cast in place. The forming work of can be performed quickly. By introducing cement milk or muddy water at the same time during the excavation, it is possible to exert a kind of lubricating action and contribute to speeding up the excavation work.

[Brief description of drawings]

FIG. 1 is an overall view showing a usage state of an embodiment of the present invention.

FIG. 2 is a front view in half section of an embodiment of the present invention.

FIG. 3 is a side view of the same.

FIG. 4 is a cross-sectional plan view of the main part.

FIG. 5 shows a first usage sequence in the same usage state.

FIG. 6 shows a second usage sequence in the same usage state.

FIG. 7 shows a third use order in the same use state.

FIG. 8 is a plan view showing a formation state of the underground wall body.

FIG. 9 is a side view of the other main part.

10 is a sectional view taken along line AA of FIG.

FIG. 11 is an overall view showing the same usage state.

[Explanation of symbols]

 1 thin frame main body 2 panel 2a upper side panel 2b lower side panel 3 panel 3a upper side panel 3b lower side panel 4a endless chain saw 4b endless chain saw 5a drive sprocket 5b drive sprocket 6a driven sprocket 6b driven sprocket 7 excavating blade 8b support shaft 8a Support shaft 9a Excavation rotor 9b Excavation rotor 10a Buffer connection device 10b Buffer connection device 11 Cement milk or muddy water introduction pipe 13 Leader 14 Lifting device 15 Connection bracket 15a Connection part 15b Connection part 34 Excavator body

Claims (3)

[Claims] 1. A thin width frame main body in which vertically long rectangular panels are placed opposite to each other with a space provided in the front and back, and a pair of endless chain saws suspended in parallel between the front and rear double panels of the thin width frame main body. The front shape of the excavation rotor provided at the tip of the thin width frame body and the connecting bracket provided at the upper end of the thin width frame body and having a pair of connecting portions is formed into a vertically long rectangle, and the front and rear width is thin. Use the width of the excavator body, lay the excavator body on the ground in advance, and lower the elevating device that elevates and lowers along the leader close to the ground. The excavator body is rotatably connected by one of the pair of connecting portions, and the elevating device is raised in this state to erect the excavator body while standing upright along the leader. After that, the upright excavator body is sunk by the elevating device to perform excavation work. A method for forming an excavation hole for forming a thin film wall body, wherein an excavator body is connected so as not to be rotatable, and excavation work is continued in this state. 2. The verticality of the excavator body during subsidence to the ground is maintained by driving the pair of endless chains and the pair of excavator rotors independently of each other in forward and reverse directions, and thus the excavator body is submerged in the ground. Forming method for forming a thin-film wall body corresponding to the outer diameter of the thin-film wall body. 3. A drilling hole forming method for forming a thin film wall body, wherein cement milk or muddy water is injected into the drilling hole when the drilling machine body is submerged or pulled up.