JPH0762347B2 - Construction method and equipment for core pile press-fitting column piles such as earth retaining piles and support piles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing core material press-fitted column piles such as earth retaining piles and support piles, and an apparatus therefor.

[0002]

2. Description of the Related Art When drilling for long earth retaining or placing foundation piles under conditions where the head is extremely restricted, such as in a tunnel or under a guard, at least the connection joint is fitted from the effective head. Twice the length, the height to the holding bottom of the additional screw or rod (hereinafter collectively referred to as the excavating member, referred to as the additional rod), and the length of the additional rod excluding the height of the excavation mechanism. There is no choice but to construct while connecting.

[0003]

Therefore, according to the conventional technique, it is necessary to carry out the construction while connecting the short connecting rods in accordance with the above-mentioned conditions, so that the frequency of the connecting is increased, and this connecting is increased. The time required is 5 to 7 times the time required for actual drilling, and it is also necessary to construct earth retaining piles or build H-shaped steel as the core material. Due to the fact that the main body is equipped with a core material installation device, there is a problem that it is not possible to move to the next process until the H-shaped steel installation is completed. There were various problems such as a longer construction period. In view of this, the present invention is
The drilling machine and the core material builder are installed side by side as independent structures, and the deduction length can be shortened to the limit by the cooperation of both, and the number of times of connecting rods can be greatly reduced. A soil retaining pile that can improve work efficiency and shorten the construction period, and press the core material into the soil cement or mortar column in the drilled hole to check the bearing capacity,
The purpose of the present invention is to provide a method for constructing a core pile press-fitted column pile such as a support pile and an apparatus therefor.

[0004]

In order to solve the problems of the above-mentioned conventional techniques, the present invention provides an underground construction for constructing an underground structure in an area where existing structures are present and where there is no head limitation. , A drilling machine and a core material builder which are connected so that the distance between them can be adjusted are installed in parallel, and drilling is performed by a drilling rod connected to a vertically moving drilling mechanism of this drilling machine, and the drilling mechanism reaches the bottom end. When only the excavation mechanism is hoisted, the excavation mechanism is turned and the additional rod placed on the stock part on the side of the drilling machine is added between the excavation mechanism and the drilling rod that has entered the ground to continue drilling. After excavating to a predetermined depth by the above procedure, the drill rods are sequentially withdrawn in the reverse order of the above procedure and returned to the stock section.Then, the core material builder is moved to the drilling position and the core material is drilled while adding the core material. Soil cement in the hole or A method of constructing a core material press-fitted column pile, such as earth retaining piles, support piles, etc., characterized in that the core material is pressed into the rutar column at a predetermined pressure and the bearing capacity is confirmed, and a punching machine and a core material builder. Are installed side-by-side and connected so that the spacing can be adjusted, and the excavation mechanism is vertically movable along the vertical frame of the drilling machine, and the excavation mechanism is swingably supported to support the core material of the core material builder. A holding head is provided so that it can be swung and moved in the front-rear direction, and a stocking part for the extended rod is provided between the boring machine and the core material builder to excavate the ground and build the core material in parallel. It is an apparatus for constructing core material press-fitted column piles, such as earth retaining piles and support piles, which are characterized in that they can be carried out.

[0005]

[Operation] A punching machine and a core material building machine are installed in parallel, and the distance between the cores is set according to the arrangement pitch of the earth retaining piles, and the drilling by the drilling machine and the core material building into the drilling are performed simultaneously. Do
The core material is press-fitted into the soil cement or the mortar column in the drilled hole, and the supporting force can be confirmed by the pressure.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 shows the front of one embodiment of the present invention, and FIG. 2 shows the same plane.

A core material press-fitting column pile construction apparatus 1 according to the present invention comprises a punching machine 2 and a core material building machine 3, both of which are lower carts. Wheels 6 and 7 rotatably supported by 4,5 are engaged with rails 8 and 8 installed on the fixed side such as on the ground and movably placed in the same direction. As shown in FIG. The rod 9a of the connecting distance adjusting cylinder 9 mounted on the pier is connected to the trolley 5 of the core material builder 3, and the operation of the cylinder 9 causes the distance between the trolleys 4 and 5 to be the center of the piercing machine 2 and the builder. The distance between the center and the built-in center of No. 3 can be adjusted within the range of 1.2 to 3.2 m.

In the boring machine 2, a plurality of revolving frames 11, 11 ... Having a substantially U-shaped plan shape are provided in front of a tower 10 erected on a carriage 4 so as to be revolvable in a horizontal plane by a vertical shaft 12. The vertical frames 13, 13 are supported and fixed to the swivel frames 11, 11. The swivel frames 11, 11, ... Swing the swivel cylinder 14 connected to the bogie 4 at a predetermined angle to the core material builder 3 side in the horizontal plane by the expansion and contraction operation (FIG. 5). .

The left and right frames 13, 13 of the above frame
An excavation mechanism 15 is provided between them so as to be vertically movable.
The excavation mechanism 15 includes a hydraulic motor 17 in a case 16.
And a speed reducer 18 for reducing the rotation of the hydraulic motor 17.
And a connecting portion 20 for connecting the rod 19 to the output shaft of the speed reducer 18, and the guide rollers 21 and 21 axially supported by the side surface of the case 16 engage with the side surfaces of the frames 13 and 13 to move up and down. The movement is being guided.

The vertical movement mechanism of the excavation mechanism 15 is composed of lifting cylinders 22, 22 in the illustrated embodiment. That is, as shown in FIGS. 1 and 3, the left and right frames 13, 1
3, the lifting cylinders 22, 22 are fixedly installed with the rods 22a, 22a facing downward.
The sprockets 23, 23 are axially attached to the tip of a, and the connecting block 2 is provided immediately below the sprockets 23, 23.
Sprockets 24, 24 are axially mounted via 2b, 22b, and one end 25a is fastened to the upper part of the frames 13, 13 and chains 25, 25 are sprockets 23 for rods 22a, 22a of the lifting cylinders 22, 22. The other end 25b is fixed to the upper part of the case 16 of the excavation mechanism 15 via sprocket 26, 26 wound around 23 and pivotally mounted on the upper parts of the frames 13, 13. In addition, the chain 27, 2 whose one end 27a is fixed to the lower part of the frame 13, 13
7 is wound around the lower sprockets 28, 28 of the connecting block 22b via the aforementioned sprockets 24, 24,
The other end 27b is fixed to the lower part of the case 16 of the excavation mechanism 15. Therefore, the rods 22a and 22a expand and contract during the operation of the lifting cylinders 22 and 22, so that the excavation mechanism 15 moves up and down over a stroke twice that of the rods 22a and 22a.

Jacks 29, 30 and 31 that extend upward and downward are provided at the left and right lower ends of the frames 13 and 13 and the upper end of the tower 10, respectively.

A connecting rod 19 is added to the excavation mechanism 15.
A chuck mechanism 32 is provided for bringing the to the drilling position. The chuck mechanism 32 is composed of a pair of upper and lower parts, and an arm 34 having a base portion pivotally supported by a shaft 33 in a horizontal plane on a frame 13 adjacent to the core material builder 3 side and a tip end of the arm 34. The holding claw 36 provided on the connected four-joint link 35 and the four-joint link 35
1 and the swivel cylinder 37 that connects the arm 34, and the holding claw 36 is opened by the shortening operation of the swivel cylinder 37 and is closed by the extending operation.

The turning motion of the turning frames 11, 11, ...
And the gripping pawl 36 by the combined swivel movement of the arm 34.
The additional rod 1 that is stocked in the stock portion 19a in parallel with the location where the is located (in the embodiment, the core material builder 3 side)
It is configured so that 9, 19, ... Can be sequentially clamped. The arm 34 is manually rotated, but it may be operated by a cylinder. In the figure, 38 is a hydraulic unit and 39 is an operation panel.

The core material builder 3 has rails 40, 40 arranged on the carriage 5 at right angles to the rails 8, 8 and the rails 40, 40 have shafts on both sides of an auxiliary carriage 41. The supported wheels 42, 42 are mounted so as to be engaged with each other so as to be movable in the front-rear direction, and a tower 43 is erected on the auxiliary carriage 41. The auxiliary carriage 41 is adapted to be finely adjusted and moved by the operation of a position adjusting cylinder 44 installed in the carriage 5 as shown in FIG.

On the front surface of the tower 43, the bases of the upper and lower revolving arms 45, 45 are rotatably supported by a vertical shaft 46 in a horizontal plane, and are connected between the revolving arms 45, 45 and the tower 43. The swiveling cylinder 47 is expanded and contracted to swivel.

A vertical frame 48 is pivotally supported on a shaft 52 at the tips of the swivel arms 45, 45.
8, a core material holding head 49 is provided to be movable up and down.
The core material holding head 49 has a suspending portion 50 which is connected to a hole formed in an end portion of a core material such as H-shaped steel by a pin or the like to suspend the suspension material, and a mounting portion 51 of the suspending portion 50. The lower surface of is the core member pressing surface 51a.

In the illustrated embodiment, the vertical drive mechanism for the core material holding head 49 is composed of lifting cylinders 53, 53, similar to the excavation mechanism 15. That is, with the heads 53a, 53a on the left and right of the frame 48 as the upper side, the lifting cylinder 5
3, 53 are fixedly mounted, sprockets 54, 54 are axially attached to the tips of the rods 53a, 53a, and sprockets 55, 55 are axially attached at positions directly above the sprockets 54, 54 via a connecting block 53b. Cage, one end 56
chain 56, 56 in which a is fixed to the upper part of the frame 48
Is wound around the sprockets 55, 55, and the frame 4
The other end 56b is fixed to the upper part of the core material holding head 49 via the sprocket 57, 57 on the upper part of FIG. In addition, one end 58a is attached to the lower portion of the frame 48 to the chain 5.
8, 58 are rods 53a, 5 of the lifting cylinders 53, 53
The other end 58b is fixed to the lower part of the core material holding head 49 via the sprockets 59, 59 at the lower part of the connecting block 53b. Therefore, when the elevating cylinders 53, 53 are operated, the rods 53a, 53a expand and contract, so that the core material holding head 49 moves up and down over a stroke twice that of the rods 53a, 53a.

A swivel cylinder 60 is connected between the swivel arm 45 and a side portion of the frame 48, and a lower portion of the frame 48 is mounted on an upper surface of the carriage 5 on an arc-shaped rail 61 centered on the shaft 46. The wheels 62 are in contact with each other via the wheels 62 to support the load of the frame 48 and the core material holding head 49. Therefore, when the swing cylinder 47 is expanded and contracted, the frame 48 is swung around the shaft 46, and when the swivel cylinder 60 is expanded and contracted, the frame 48 swings around the shaft 52.

Jacks 63, 64, 65 are provided at the upper end of the tower 43 and the upper and lower ends of the frame 48 so as to expand and contract upward and downward. Reference numeral 66 in the figure denotes a hydraulic unit.

The swivel device 67 is located above the case 16 of the excavation mechanism 15 and in front of the axes of the sprockets 26, 26 above the frames 13, 13, and
The swivel device 67 is configured so that the swivel device 67 can take the most raised position when the vehicle 5 is raised.

FIG. 8 is a side view exemplifying the extension rod 19. A fitting portion 68 for connection is provided at one end, and an insertion portion 69 fitted into the fitting portion 68 is provided at the other end. As shown in FIG. 9, it has a hexagonal shape, and grooves 71, 71 for inserting and retaining the connecting pins 70, 70 on both sides of the insertion portion 69.
Is provided in the fitting portion 68, and the pin insertion portion 7 is provided in the fitting portion 68.
2, 72 are provided.

Next, the construction sequence will be described with reference to the above embodiment. The punching machine 1 is moved to a predetermined position, and the jacks 29, 30, 31 are stretched and fixed at that position, and the drilling rod connected to the connecting portion 20 of the excavation mechanism 15 is used for punching. This perforation is performed by driving the hydraulic motor 17 to rotate the connecting portion 20 via the speed reducer 18.

When the rods 22a, 22a of the elevating cylinders 22, 22 are contracted by the digging load, the connecting block 22 is moved.
Since the sprockets 24, 24 are pulled up via the b, 22b, the chain 27 is pulled and the other end 27 of the chain 27 is pulled.
It is added by pulling down the excavation mechanism 15 to which b is connected.

When the excavation mechanism 15 reaches the lowermost end, the connecting pin connecting the rod 19 and the connecting portion 20 is pulled out, and only the excavation mechanism 15 is moved to the rod 22 of the lifting cylinders 22, 22.
jack 2 after being lifted by the extension operation of a and 22a
9 and 30 and 31 are contracted, and the revolving cylinder 14 of FIG. 2 is operated to revolve the revolving frames 11, 11 ... (FIG. 5). Then, the arm 34 is swung to add the holding claw 36 to the stock portion 19a of the rod 19, and the one adding rod 19 is held between the holding claws 36. When the cylinder 37 is extended in this way, the clamping claw 36 is closed and the upper and lower portions of the connecting rod 19 are clamped. In this state, the upper end of the replenishing rod 19 is positioned directly below the connecting portion 20 of the excavation mechanism 15, and the connecting pin is hit to connect. After that, the excavation mechanism 15 is hoisted up to the empty head limit and swiveled, and after centering, it is connected to the rod already buried in the ground to continue drilling again. Then, the above procedure is repeated until the desired depth is reached. When the drilling for the soil retaining pile is completed in this way, the rods are sequentially pulled out and removed by the procedure reverse to the above-described drilling.

After the drawing is completed, the jack 29 of the punching machine 2,
30 and 31 are loosened, the connecting distance adjusting cylinder 9 is operated, and the bogie 4 is moved to the next punching position by using the core material builder 3 having the jacks 63, 64 and 65 stretched in advance as a reaction force. Tension and fix the jacks 29, 30, 31. At the same time, the jacks 63, 6 of the core material builder 3
4 and 65 are loosened, the cylinder 9 is operated in the reverse direction, and the core material builder 3 is retracted.

Thereafter, the punching machine 2 starts the next punching in the same manner as described above, and at the same time, the core material building machine 3 builds the core material. The construction of this core material is first done by jacks 64,6.
5 is loosened and the swiveling cylinders 47 and 60 are operated to swivel the frame 48 and the core holding head 49 as shown in FIG. Then, the elevating cylinder 53 is operated to lower the core material holding head 49 to the lowermost end, and the lifting portion 50 is held.
After connecting the core material to the core material, the elevating cylinder 53 is operated in the opposite direction to raise the core material holding head 49 and lift the core material while lifting it.

After that, the turning cylinder 47 is operated and the operation shown in FIG.
Then, the position adjusting cylinder 44 is operated to move the auxiliary carriage 41 in the front-rear direction to align the core material installation position. Then, the upper and lower jacks 64 and 65 of the frame 48 are stretched to fix the frame 48, and the core material is built in the kneading of mortar and soil or the mortar alone. In this installation, the elevating cylinder 53 is actuated to push it in by the pressing surface 51 a of the core material holding head 49. In this way, by the above-mentioned procedure, the core material is built up by welding or bolting until it reaches a predetermined length.

[0028]

As described above, according to the present invention,
Since the drilling and the core material building are performed in parallel, the waiting time for drilling or building is not required, and the construction efficiency of the soil retaining pile can be significantly improved. Since the punching machine and the core material builder are separate and independent, the width of the truck can be narrowed. Since only the excavation mechanism part of the drilling machine is turned,
It is possible to hold the replenishment rod by holding a stock section on the side of the bogie or on the side of the core material builder, rather than on the upper surface of the bogie, which makes it longer than the height of the bogie. The rod can be used. Since the excavation mechanism and the rod are connected at a position where the excavation mechanism of the drilling machine is turned, it is possible to use a rod having a fitting length of the connecting portion of the rod which is longer than that of the conventional machine. Since a long rod can be used as described above (specifically, a rod having a length of about 50 cm can be used), a telescopic rod can be used, and its effect is doubled. That is, if the empty head is 4 m and the construction depth is 12 m, the effective empty head is 3.7 m due to the relationship between the Tenba support and the floor pavement, so it is 1.6.
Since only rods of m can be used, and therefore 7 additional steps are required, the telescopic rod cannot be used from the viewpoint of strength, but according to the present invention, it is possible to use an ordinary rod 5 times. The expansion rod only needs to be extended three times, which greatly reduces the work time, which is 1.4 to 2.
It will be 3 times faster. Due to the synergistic effect of each of the above effects, it is possible to shorten the working time including the work for each core material press-fitted column pile to 1/3 to 1/4 of the conventional time.

[Brief description of drawings]

FIG. 1 is a front view of an apparatus for carrying out a method for constructing a core material press-fitted column pile according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side view of the punching machine.

FIG. 4 is a side view of the core material builder.

FIG. 5 is a plan view showing a turning state of the excavation mechanism.

FIG. 6 is a plan view showing how the core holding head is swung when the core is suspended.

FIG. 7 is a plan view showing an alignment situation when the core material is installed.

FIG. 8 is a side view of the rod.

9 is an enlarged view of the right end surface of FIG.

FIG. 10 is an enlarged view of the left end portion of FIG.

[Explanation of symbols]

 1 Core material press-fitting column pile construction device 2 Drilling machine 3 Core material building machine 4 Truck 5 Truck 8 Rail 9 Connection distance adjusting cylinder 10 Tower 11 Swiveling frame 13 Frame 14 Swinging cylinder 15 Excavation mechanism 17 Hydraulic motor 18 Speed reducer 19 Addition Rod 20 Connection 22 Lifting Cylinder 23 Sprocket 24 Sprocket 25 Chain 26 Sprocket 27 Chain 28 Sprocket 32 Chuck mechanism 34 Arm 36 Clamping claw 37 Swivel cylinder 41 Auxiliary bogie 43 Tower 44 Position adjustment cylinder 45 Swivel arm 47 Swivel cylinder 48 Frame 49 Core material Holding head 50 Suspended part 51a Core material pressing surface 53 Lifting cylinder 54 Sprocket 54 Sprocket 55 Sprocket 56 Chain 57 Sprocket 58 Chain 59 Sprocket 60 Times the cylinder 61 rail 67 swivel device 68 engaging portion 69 the insertion portion 70 connecting pins

Claims (2)

[Claims] 1. In an underground construction for constructing an underground structure in an underground space where an existing building exists where there is a head limitation, a drilling machine and a core material builder which are connected to each other with adjustable intervals are installed in parallel. , The drilling rod connected to the excavating mechanism of the drilling machine is used for drilling, and when the drilling mechanism reaches the bottom end, only the drilling mechanism is lifted and then the drilling mechanism is swung to stock the side stock of the drilling machine. A drilling rod is added in the reverse procedure after the drilling rod is continuously drilled by joining the drilling rod placed in the section between the excavation mechanism and the drilling rod that has entered the ground. Sequentially pulling out and returning to the stock part, then moving the core material builder to the drilling position and pressing the core material into the soil cement or mortar column in the drilled holes while adding the core material, and Check bearing capacity Earth retaining pile characterized the door, the support piles and the like, construction methods of the core material pressed column pile. 2. A drilling machine and a core material builder are installed side by side and are connected to each other so that the distance between the drilling machine and the core material builder can be adjusted. The core material holding head of the core material installation machine is swingable and movable in the front-back direction, and the stock part of the additional rod is installed between the punching machine and the core material installation machine. A construction device for a core pile press-fitted column pile, such as earth retaining piles and support piles, characterized in that the ground excavation and the core construction can be performed in parallel.