JPH0768697B2 - Construction method of the retaining wall - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to water supply and sewer piping construction,
The present invention relates to a method of building a retaining wall in the ground in a foundation work of a building, that is, a method of constructing a retaining wall.

[0002]

2. Description of the Related Art Conventionally, an earth retaining wall is built in the ground by a drilling process of drilling holes of a predetermined depth in the ground, and a H-steel main pile is driven into each hole after the drilling process. After the stakeout step, an excavation step of excavating a large hole (a hole through which a worker can enter and work) on one side between the main piles after the stakeout step, and a predetermined shape between the main piles after the excavation step. A plate assembling step of incorporating the horizontal sheet piles one by one to form a retaining wall, and an embedding step of refilling the soil in the gap (excess area) formed between the back surface of the retaining wall and the ground after this assembling step. Has been done.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The above-mentioned conventional method of constructing a retaining wall includes a plate assembling step of forming a retaining wall by incorporating horizontal sheet piles of a predetermined shape between the main piles, and a rear surface of the retaining wall. Since the earth filling process to refill the soil in the gap (excess area) formed between the ground is performed manually by the operator,
Not only there is a problem that the work efficiency is poor, but depending on the soil quality of the ground, the ground collapses during the plate assembly process, which hinders the work. There is a problem that the ground adjacent to the ground goes down and the neighboring house and the fence are affected. The present invention has been made to deal with the above-mentioned problems, and the purpose thereof is to make it possible to efficiently build a retaining wall in the ground on any ground and to have a small effect on the adjacent land, adjacent house, or fence. To provide a construction method.

[0004]

[Means for Solving the Problems] The above-mentioned objects include a drilling step of drilling holes of a predetermined depth at a predetermined interval in the ground, and a pile driving step of driving a H-steel parent pile into each hole after the drilling step. After the pile driving step, the ground between the main piles is sequentially excavated from the upper side to the lower side, and when excavating to a predetermined depth, the excavating blade is retracted to one side, and the main pile is piled according to the excavation during the excavating step. A plate insertion step of inserting and assembling a soil retaining plate having a predetermined width and a predetermined length in the back so that an injection pipe is vertically movable, and an excavating step and a blade removing step of extracting the excavating blade after the plate inserting step. The filling step of filling the filler such as mortar paste into the gap formed between the back surface of the soil retaining plate and the ground through the injection pipe while raising the injection pipe at the same time as or after the blade cutting step Construction of earth retaining wall It is achieved by the law.

[0005]

In the method of constructing the retaining wall according to the present invention, the excavation of the ground between the main piles, which has been driven into the ground at a predetermined interval in the previous step, and the assembling of the retaining plate between the main piles are the excavation step. Since it can be done at the same time with the plate insertion step, the soil retaining plate can be efficiently built on any ground. In addition, at the same time as or after the step of removing the excavating blade, there is a filling step of lifting the injection pipe and filling the gap formed between the back surface of the soil retention plate and the ground with the injection pipe through the injection pipe. , It is not necessary to refill the gap (excess area) with soil, improving work efficiency and
The filling material that fills the excess moat can accurately fill the excess moat, and can reduce the effect on adjacent land, adjacent houses, and walls.

[0006]

An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show that H-shaped steel main piles D and D are driven into the ground G at a predetermined interval L through a drilling step and a pile driving step after the drilling step according to the present invention. In the drilling process, a well-known auger type excavator (not shown) is used to drill holes G1 of predetermined depth in the ground G at predetermined intervals. An H-shaped steel parent pile D is driven into each hole G1 by using a machine (not shown).

Further, FIGS. 3 and 4 show a method of constructing a retaining wall according to the present invention, in which the soil is injected into the back portion with a predetermined width and a predetermined length between the main piles D and D through an excavating step, a board inserting step and a blade removing step. Pipe E
3 shows a state in which an earth retaining plate W, which is attached so as to be movable up and down, is assembled. As shown in FIGS. 3 and 5, the earth retaining plate W is connected to a large number of lateral sheet piles W1 and these are connected to one sheet. It is composed of a band iron W2 as a plate, a number of fixing screws W3, a reinforcing metal member W4 fixed to the lower side of the horizontal sheet pile at the lower end, and a pair of locking metal members W5 fixed to the band plate W4.

However, the excavating process, the plate inserting process and the blade removing process are shown in FIGS.
In the excavation process, the ground G between the main piles D and D is used for the excavation chain 14 and the excavation blade 1 of the soil retaining device 10.
4a1, 14a2, 14a3 and the rotary cutter 15 are sequentially excavated downward from above and when excavated to a predetermined depth, the lower end of the excavation chain 14 and the excavating blade 14a1, 1
The 4a2, 14a3 and the rotary cutter 15 are arranged to be retracted to one side (lower side in FIG. 4). In addition, in the plate insertion step that is performed at the same time as this excavation step, the earth retaining device 10
The earth retaining plate W which is erected upright along the holder 16 and whose upper end is clamped by the clamp 18 is inserted and assembled between the main piles D and D in accordance with the excavation, and finally the earth retaining plate W is pressed and driven. Fifty
The required amount is driven into the ground G.
In addition, in the cutting process after the excavation process and the plate insertion process, the excavation blade 1
4a1, 14a2, 14a3 and the rotary cutter 15 are adapted to be extracted upward together with the movable support column 12 and the like.

After the state shown in FIGS. 3 and 4, the filling step of the method for constructing the earth retaining wall according to the present invention is carried out. In the filling step, the filling pipe E is lifted while the filling is performed. A filler J such as mortar paste is filled into a gap F formed between the back surface of the soil retaining plate W and the ground G through the pipe E using a known injection machine (not shown). The filling material J is also filled in the gap K formed between the rear surface of the soil retaining plate W and the parent pile D. Further, in the above-described embodiment, the filling process is performed after the blade removing process, but the excavating blades 14a1 and 14a are
It is also possible to raise the injection pipe E together with 2, 14a3, the rotary cutter 15 and the movable support 12 so that the filling step is performed simultaneously with the blade removing step.

The earth retaining device 10 shown in FIG. 6 is assembled to a heavy machine A with a caterpillar so that it can be laid down and conveyed as shown by a phantom line, and a frame A1 of the heavy machine A is installed.
The main pillar 11 assembled to the
Swing arm 13, excavation chain 14, rotary cutter 15,
It is composed of a holder 16, an engaging member 17, a clamp 18, and the like. A pair of left and right outriggers B (one of which is not shown) is attached to the rear portion of the frame A1 of the heavy equipment A.

The main pillar 11 is mounted on the frame A1 of the heavy machine A so as to be capable of undulating and tilting in the left-right direction (vertical direction in the plane of FIG. 6) and rotatable in the direction of the arrow S, and has a lower end. The outrigger B is attached to the ground G so that the outrigger B is installed substantially perpendicularly to the ground G, and the heavy machine A can convey the ground in the illustrated state. Further, a pair of left and right guide rails 11a are attached to the front surface of the main pillar 11 as shown in detail in FIG.
As shown by 3, a pair of left and right guide arms 11b are attached.

The tilting of the main pillar 11 in the left-right direction is performed by the hydraulic cylinder C1 shown in FIGS. 6 and 7 through the bracket assembly 70 and the holder assembly 80 assembled to the main pillar 11, and the arrow S. 6 and 7, the hydraulic cylinder C2 shown in FIGS. 6 and 7 is rotated through a bracket 11c fixed to the main column 11, and the undulation is performed by a pair of left and right hydraulic cylinders shown in FIGS. C
3 is configured to be performed via a holder assembly 90 mounted on the main pillar 11, and the operation of each hydraulic cylinder can be controlled in the operation room of the heavy equipment A.

The bracket assembly 70, as shown in FIGS. 7, 8 and 9, is a pair of pins 71 rotatably assembled to the frame A1 of the heavy machine A via the bracket A2 (see FIG. 6). And pin 8 of the holder assembly 80
1, a sleeve 72 that is rotatably assembled, a pair of bosses 73 that rotatably supports the base of the hydraulic cylinder C1 for tilting left and right, and a plate 74 that connects these.

As shown in FIGS. 7, 8 and 10, the holder assembly 80 includes the above-mentioned pin 81 and a separable half-divided cylindrical body which rotatably supports the main column 11 integrally with the pin 81. 82, a pair of bosses 83 that rotatably support the tip end portion of the hydraulic cylinder C1 for tilting left and right, and a pin 85 and a holder 85 that can be attached and detached integrally with the boss 83. It is constituted by a plate 84 which is swingably supported by a pin attached to the two hydraulic cylinders C1 and C2 and is arranged substantially horizontally.

As shown in FIG. 11, the holder assembly 90 includes a separable half cylinder 91 for rotatably supporting the main column 11, a plate 92 fixed to the cylinder 91, and a shaft fixed to the plate 92. It is composed of 93 and a lever 94 that is swingably assembled to the hydraulic cylinder C3 and that is connected to each hydraulic cylinder C3 at each tip. The plate 92 has five drums for guiding wires 21 and 25 described later. Roller 95
Are rotatably assembled.

The movable support column 12, as shown in FIG.
The guides 12a provided on the rear surface of the upper part are attached to the guide rails 11a of the main post 11 and the pair of left and right guide rails 12b provided on the rear face excluding the upper part so as to be vertically movable to the guide arms 11b of the main post 11. In the operation room of the heavy equipment A, it can be moved up and down by a strut drive device 20 that can be controlled.

The strut driving device 20 includes the pulling wire 2
1, a winch 22 for rewinding and rewinding this, a pulling down wire 23, and a winch 2 for rewinding and rewinding this
4 and a winch 24 with a wire 2
The movable support column 12 can be moved downward by winding 3 and rewinding the wire 21 by the winch 22, and is movable by winding the wire 21 by the winch 22 and rewinding the wire 23 by the winch 24. Stanchion 12
Can be moved up.

The pulling wire 21 is fixed to the upper part of the main pillar 11 at one end, and the pulley P1 is attached to the upper end of the movable pillar 12 and the pulleys P2 and P3 are attached to the upper end of the main pillar 11 and the main pillar 11. Is wound around the winch 22 via a drum-shaped roller 95 (see FIG. 11) of a holder assembly 90 that supports the intermediate portion of the movable column 12 and the pull-down wire 23 is fixed to the lower end of the main column 11 at one end. Pulleys P4 and P5 (see FIG. 12) mounted on the upper part of the column, a pulley P6 mounted on the lower end of the main column 11 and a pulley P mounted on the intermediate part of the main column 11.
It is wound around the winch 24 through 7.

A wire 25 for hoisting the soil retaining plate W is arranged in parallel to the pulling wire 21, and the wire 25 is arranged in parallel with the pulleys P8 and P3 assembled on the upper end of the main pillar 11. It is adapted to be wound around a winch (not shown) arranged in parallel with the winch 22 via a pulley (not shown) arranged in the above and a drum-shaped roller 95 (see FIG. 11) of the holder assembly 90.

As shown in detail in FIG. 13, the swing arm 13 is swingably attached to the lower end of the movable column 12 via a support shaft 13a, and is controlled in the operation room of the heavy equipment A. A possible arm driving device 30 moves and holds it in a vertical position shown by an imaginary line or a forward swinging position shown by a solid line. The arm drive device 30 is a hydraulic cylinder rotatably connected to the movable column 12 at one end and rotatably connected to the swing arm 13 at the other end.

As shown in FIG. 6 and FIG. 14, the excavation chain 14 is an excavation means for excavating the ground and carrying out soil to make a hole, and three types of excavating blades 14a1 for reducing excavation resistance. 14a2 and 14a3 are sequentially attached to the outer circumference, and the movable support column 12 and the swing arm 13 are provided.
Are mounted along the front and rear of the movable strut 12, and are mounted on the drive sprocket 14b mounted on the upper part of the movable column 12 and the driven sprocket 14c mounted on the tip of the swing arm 13, and in the operation room of the heavy equipment A. Controllable chain drive 4
When the drive sprocket 14b is rotated counterclockwise in FIG. 6 by 0, the drive sprocket 14b is transferred in the arrow direction in FIG. The chain drive device 40 includes a hydraulic rotary motor 41 and a drive chain 42 that transmits the rotation of the hydraulic rotary motor 41 to the drive sprocket 14b. The excavation chain 14 has a guide plate 12c fixed to the front surface of the movable column 12 and a guide block 12d attached to the front surface of the lower end of the movable column 12, the portion being transferred downward.
And the guide block 1 fixed to the front surface of the swing arm 13.
It is held by a guide 3b.

As shown in FIG. 15, the rotary cutter 15 includes a boss member 15a having a predetermined width and six blades 15b fixed on the boss member 15a and having a predetermined diameter (the number can be changed as appropriate).
The driven sprocket 14c is rotatably attached to the tip of the swing arm 13 by being integrally rotatably attached to both left and right sides of a rotary shaft 15c which rotatably supports the driven sprocket 14c at the center. It is designed to rotate with the transfer. The blades 15b are arranged so as to be displaced in the axial direction and are arranged at equal intervals in the rotation direction to reduce the excavation resistance.

As shown in FIGS. 6, 13 and 16, the holder 16 comprises a pair of left and right pipes 16a, a connecting plate 16b for connecting them, and a head member 16c fixed to the upper ends of both pipes 16a. Head member 16c
It can be moved up and down on the front surface of the movable column 12 by being assembled to the guide rail 11a of the main column 11 at the rear end and to the guide tube 12e attached to the lower part of the movable column 12 at the bottom of both pipes 16a. And a pressure drive device 50 that can be controlled in the operation room of the heavy equipment A.
It is designed to be moved up and down by. The pressure drive device 50 is a hydraulic cylinder rotatably connected to the movable column 12 at the upper end and rotatably connected to the upper end of the holder 16 at the lower end.

As shown in FIGS. 6 and 13, the engaging member 17 is a plate attached to the lower end of the holder 16, and is a locking metal fitting W provided on the earth retaining plate W having a predetermined width and a predetermined length.
5 is detachably engaged upward. On the other hand, the clamp 18 is attached to the upper end of the holder 16 as shown in FIGS.
The upper part of the above is detachably clamped, and is composed of a pair of left and right cam plates 18a and a pair of left and right hydraulic cylinders 18b that rotationally drive these, and each hydraulic cylinder 18b can be controlled in the operation room of the heavy equipment A. Has become.

In the earth retaining device 10 constructed as described above, the earth G where the earth retaining plate W is applied to the main pillar 11 with the movable support column 12 and the holder 16 preliminarily lifted, that is, FIG.
And, as shown in FIG. 2, the hydraulic cylinders C1, C2 are transferred by the heavy equipment A to the ground G in which the main piles D, D have been driven in advance.
C3 and each outrigger B are operated to install them substantially vertically, and then the earth retaining plate W is fixedly held in the holder 16 by using the wire 25 and the lifting engagement member 17 and the clamp 18. Then, the excavation chain 14 is transferred by the chain drive device 40 and the rotary cutter 15 is rotated while the swing arm 13 is moved and held in the forward swing position to move the movable column 12 along the main column 11 by the column drive device 20. When the movable pillar 12 is moved downward, the excavation blades 14a1, 14a2, 14a3 of the excavation chain 14 and the rotary cutter 15 move the movable pillar 12, and the ground G between the main piles D, that is, the movable pillar 12 and the engaging member 17, The ground G corresponding to the holder 16, the earth retaining plate W, and the like is sequentially dug up, and the earth retaining plate W fixedly held in the holder 16 by the engaging member 17 and the clamp 18 is sequentially embedded in the ground together with the holder 16 and is a main pile. It is inserted and assembled between D and D.

While the earth retaining plate W is buried in the ground in a predetermined amount, the swing arm 13 is swingably held by the arm drive device 30 in the vertical position (rear position), and the tip of the swing arm 13 and the rotary cutter are held. When the pressing drive device 50 pushes the holder 16 downward while the excavation chain 14 along the tip of the rocking arm 15 and the swing arm 13 is retracted from below the soil retaining plate W to the rear, the engaging member 17 and the clamp 18 At holder 1
The lower end of the soil retaining plate W fixedly held at 6 is pushed into the undigged ground by a desired amount. After that, the clamp 18 is released and the movable column 12 is moved to the column driving device 2
If it is moved upward by 0, the excavation blades 14a1 and 14a of the excavation chain 14 in a state where the soil retaining plate W is built in the ground G.
2, 14a3 and the rotary cutter 15 are lifted to the ground together with the movable column 12, the holder 16, the engaging member 17, the clamp 18, and the like. Injection pipe E at this time or thereafter
When the filler J such as mortar paste is filled through the same injection pipe E while lifting the wire using the wire 25, the filler J forms a gap F between the back surface of the soil retaining plate W and the ground G.
Then, it flows into the gap K between the rear surface of the soil retaining plate W and the parent pile D, and the gaps F and K are accurately filled with the filler J.

In the above embodiment, the earth retaining plate W is composed of the transverse sheet pile W1, the band iron W2, the fixing screw W3, the reinforcing metal fitting W4 and the locking metal fitting W5.
As for, an iron plate of a predetermined size or a veneer plate (for example, width 900 mm, plate thickness 12 mm to 15 mm, length 1800 mm) is stuck together (this is width 900 mm, plate thickness 12 mm to 1
5mm, length 900mm, 4 pieces, width 900mm, plate thickness 12mm ~ 15m
m, 450 mm long two pieces in a zigzag manner in the length direction to form a 900 mm wide, 24 mm to 30 mm thick, 2250 mm long) or full-sized veneer (eg,
Width 900 mm, thickness 12 mm to 15 mm, length 1800 mm) 3 pieces and half size plywood (for example, width 450 mm, thickness 12 mm
〜15mm, length 1800mm) Two pieces of full size veneer boards are arranged side by side and connected by connecting metal fittings, and a half size veneer board is arranged side by side with the full size veneer board as the center and connected respectively. It is possible to adopt a structure in which the reinforcing metal fittings W4 and the locking metal fittings W5 of the above-mentioned embodiment are attached to the bonded ones which are connected by the metal fittings.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing a state after a drilling step and a pile driving step of a method of constructing a retaining wall according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a vertical cross-sectional front view showing a state after a blade removing step of the method for constructing a retaining wall according to the present invention.

FIG. 4 is a plan view of the same.

FIG. 5 is a vertical sectional side view of the soil retaining plate shown in FIG.

FIG. 6 is an excavation process of a retaining wall construction method according to the present invention;
It is a side view which shows one Example of the earth retaining construction apparatus used for a board insertion process and a blade extraction process.

FIG. 7 is a view showing a mechanism for tilting the main pillar of the soil retaining device in the left-right direction and a mechanism for rotating the main pillar.

FIG. 8 is a diagram showing a mechanism for undulating a main pillar of the earth retaining device and a mechanism for tilting the main pillar in the left-right direction.

9 is a view showing the bracket assembly shown in FIGS. 7 and 8. FIG.

10 is a view showing the holder assembly shown in FIGS. 7 and 8. FIG.

11 is a view showing the holder assembly shown in FIG. 6. FIG.

FIG. 12 is a diagram schematically showing an internal structure of an upper part of a movable column.

[FIG. 13] The movable column, swing arm, excavation chain, rotary cutter, holder, engagement member, clamp, and
It is a figure which shows the relationship of an earth retaining plate.

FIG. 14 is a view showing a part of an excavation chain having three types of excavation blades attached thereto.

FIG. 15 is a diagram showing a relationship among a swing arm, an excavation chain, a rotary cutter, and the like.

16 is a diagram showing the relationship among the main columns, movable columns, holders, clamps, retaining plates, etc. shown in FIG.

[Explanation of symbols]

10 ... Soil retaining device, 11 ... Main column, 12 ... Movable column, 1
3 ... Swing arm, 14 ... Excavation chain, 14a1, 14
a2, 14a3 ... Excavating blade, 15 ... Rotating cutter (rotating excavating blade), 16 ... Holder, 17 ... Engaging member, 18 ... Clamp, 20 ... Strut driving device, 30 ... Arm driving device, 40
… Chain drive, 50… Pressure drive, D… Parent pile,
E ... injection pipe, F ... gap, J ... filler, W ... earth retaining plate,
G ... Ground, G1 ... Hole.

Claims (1)

[Claims] 1. A drilling step of drilling holes of a predetermined depth at a predetermined interval in the ground, a pile driving step of driving a H-steel parent pile into each hole after the drilling step, and a space between parent piles after the pile driving step. The excavation step of retreating the excavation blade to one side when excavating the ground sequentially from the upper side to the lower side and excavating to a predetermined depth, and the back part with a predetermined width and a predetermined length between the parent piles during the excavation step. Into the plate inserting step of inserting and assembling the soil retaining plate in which the injection pipe is vertically movable, and the excavating step and the blade extracting step of extracting the excavating blade after the plate inserting step, simultaneously with or after this blade removing step. A method for constructing a soil retaining wall, which comprises a filling step of filling a filler such as mortar paste into a gap formed between the back surface of the soil retaining plate and the ground through the inlet pipe while lifting the inlet pipe.