JPS6217295A - Concrete flow-down member of liner plate for shaft and usagethereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a concrete falling member of a liner plate for a vertical shaft used in a deep foundation construction method and a method of using the same.

Conventional technology Conventionally, corrugated steel plates have been generally used as liner plates, and the construction of vertical shafts using these usually involves drilling a hole at the construction point, assembling the liner plate in a ring shape, and then excavating the floor. Liner plates are connected one after another in the horizontal direction and then in the vertical direction.

In addition, when using it as a foundation, the liner plate and the hole wall should be closely connected to the ground to prevent the lateral movement of the pile in the event of an earthquake and to obtain sufficient reaction force to maintain safety. The gap is filled with grout, etc.

Problems to be Solved by the Invention In this case, there was a problem in that there was no way to confirm whether the entire void was completely filled with grout, and it required two steps: filling with grout and filling the pile body with concrete.

In order to solve the above-mentioned drawbacks, we developed a liner plate with openings structured to allow concrete to flow out smoothly and prevent the intrusion of earth, sand, and stone blocks. The left and right and top and bottom end faces of the plate are sequentially tightened with bolts and extended downward, and concrete 14 is poured into the gap 12 between the hole wall 11 and the liner plate 2 through the opening 3 as shown in FIG. 14 flows down to the outside of the liner plate 2 relatively smoothly along the slope 4 and is easy to drive uniformly, but during the shaft excavation work, it comes into contact with the fragile sandy ground and some parts Reinforcement may be required.

In other words, excavating around weak ground loosens the ground and causes landslides, so it is necessary to pour concrete between the ground and the liner plate to stabilize the hole wall and prevent collapse.

Therefore, as shown in FIG. 1, the lower flange 2a of the liner plate 2 and the upper flange 15a of the bottom mounting member 15
When the concrete 14 is poured from the opening 3 of the liner plate 2, it flows smoothly to the outside of the liner plate 2 via the slope s4, and the concrete 14 filling the gap 12 is attached to the bottom. The concrete 14 is poured uniformly up to the outer edge of the member 15 and the sloped part 15d, and the weak ground 11a and the outer edge of the liner plate 2 are solidified with concrete 14 to form the weak ground t.
Local stabilization of the pore walls of 1a can be achieved.

In this case, a sheet or the like is laid inside the liner plate 2 assembled in a ring shape, and the required amount of concrete 14 is placed on the top surface, and the hole wall 11 and liner plate 2 are connected to each other in the opening 3 using scoff-style work. Concrete 14 was poured into the gap 12, resulting in poor work efficiency (and high construction costs).

Means for Solving the Problems In order to solve the above-mentioned drawbacks, the present invention provides a liner plate 2.
At both ends of the inner edge of the opening 3, the lower outlet 1b is made smaller than the upper inlet 1a to form an approximately L-shaped chute le, and locking pieces 1c are provided at both ends of the lower outlet 1b to lock the lower outlet 1b. Attach the piece 1c to the opening 3 of the liner plate 2, connect the transport pipe 1h of the concrete pump car and the shoe) 1e,
The bottom mounting member 15 is fastened to the lower surface of the liner plate 2 to close the space between the hole wall 11 and the liner plate 2, and the concrete 14 is evenly filled and cast along the outer edge of the liner plate 2, and the hardened progeny part is attached. A concrete falling member of a liner plate for a vertical shaft, in which the member 15 is removed and the work is repeated while sequentially excavating and sequentially tightening the left and right and upper and lower end faces of the liner plate with bolts, thereby efficiently progressing the concrete pouring work. and how to use it.

Embodiment 1 An example of carrying out the present invention will be described below with reference to the drawings. What is shown in FIGS. 1 and 2 is the liner plate used in the present invention. An appropriate number of openings 3 of the upper chord type are provided, and the opening g
An inclined portion 4 that bulges upward and inward is formed below the arc portion of B3.

Next, striped portions 5 are provided horizontally near both upper and lower ends of the plate 2 and at the center. That is, small stripes 5& are provided near both upper and lower ends of the plate 2, and large stripes 5b of a required size are provided in the center, and both upper and lower ends are bent horizontally to form upper and lower flanges 2a. An outer frame 8 made of a rectangular flat plate is welded and fixed to both left and right ends of the plate body 2, and a plate reinforcing plate 7 is welded and fixed to the inner edge of the plate body 2 at an appropriate position.

Subsequently, as shown in FIG. 2, a reinforcing material 6 is inserted and fixed by welding to a large striped portion 5b of a required size at the center of the plate 2 to form a liner plate 2.

The illustrated liner plate is assumed to be used in a circular shaft as shown in Figure 9, and is configured in an arc shape, but when used in a rectangular shaft, it is configured in a flat plate shape. Accordingly, various shapes as shown in FIGS. 3(A), (B), and (C) can also be used.

The bottom mounting member 15 used in the present invention is shown in FIG. and the upper flange 15bnIt
is bent downward at a right angle to an appropriate height, a vertical piece is provided to form a shoulder portion 15c, an inclined portion 15d protrudes forward from the shoulder portion 15c, and a Δ-shaped portion having bolt fastening holes 15b at both left and right ends. An outer frame 15e made of a flat plate is welded and fixed to form a bottom mounting member 15, and a U-shaped reinforcing member 15f made of a flat plate is welded and fixed to the inner edge of the bottom mounting member 15 at an appropriate position to form the bottom mounting member 15. It is something.

The bottom attachment member 15 used in the present invention is attached to the lower flange 2a of the liner plate 2, and is configured in an arc shape, assuming that it will be used in a circular shaft, as shown in FIG. However, when used in a rectangular oval shaft, it is configured in a shape that corresponds to the shaft liner plate.
) can also be used.

The concrete flowing member 1 of the present invention is shown in Fig. 1 and Fig. 4 (A).
・As shown in (B), from the upper inlet 1a to the lower outlet 1
Reduce b to form an approximately L-shaped shoe) 1e, and weld and fix a plurality of locking pieces 1c made of round steel or flat plates of the required size at appropriate positions on both semi-inner edges of the lower M outlet 1b. death,
The locking pieces 1c are attached and fastened to both ends of the inner edge opening 3 of the liner plate 2, and the concrete flowing down member l
Concrete pump truck transport pipe 1h is connected to the upper inlet 1a of
is inserted into the hole wall 11 and the gap 12 from a concrete pump truck (not shown) through the transport pipe 1h and shoe) 1e.
Then, the concrete 14 is fed down, and the openings 3 of the liner plate 2 are moved sequentially and appropriately to fill and cast the concrete uniformly, and after hardening, the above operation is repeated while excavating successively, thereby completing the concrete pouring work. This was designed to allow for efficient progress.

The protruding notched side plate 1d shown in FIG. 4(B) is a side plate for preventing bath from flowing out when the concrete 14 flows down, and the notched groove lf is a relief groove for abutment of the upper and lower flanges 2a of the liner plate 2.

In addition, if necessary, the lower N outlet 1b of the concrete flowing member 1 can be branched into two as shown in FIG. 5 to improve work efficiency.

Example (2) In Example (2), in order to further improve the function of the concrete flow member explained in Example (1), vibration was applied to the side plate of the concrete flow member, and vibration was applied to the side plate of the concrete flow member without adversely affecting the quality of the concrete ( , which improves the vibration properties of the lower outlet.

As shown in Fig. 6, side plate 1 of concrete flowing member 1
An insertion hole 1g for the vibrating piece 16 is carved at a required position below d, and the vibrating piece 16 is inserted and attached to the insertion hole 1g.

The rear part of the lower part of the concrete flowing member 1 is bulged out to increase the storage capacity of the concrete 14, and the protruding notched side plate 1d at the front part is intended to prevent the concrete 14 from wetting when flowing down, and the notched groove If is a liner plate. An example of relief grooves for the abutment of the upper and lower flanges 2a of 2 is shown, but if necessary, concrete shown in Figs. 4 (A) and (B) and Fig. 5>KL
In some cases, an insertion hole 1g for the vibrating piece 16 is cut at a required position below the lower member 1, and the vibrating piece 16 is inserted and attached to the insertion hole 1g.

Further, when the vibrating piece 16 is attached, it may be used by being attached and fixed using a fastening fitting such as a clamp, and the vibrating machine may be selected from electric, hydraulic, or pneumatic equipment.

Method of using the present invention The method of using the concrete (FFL) lower member 1 of the present invention is as follows.
As shown in the figure, the bottom mounting member 15 is fastened to the lower surface of the liner plate 2, and the hole wall 11 and the liner plate 2 are connected to each other.
A lower outlet 1b is made smaller than an upper outlet 1a in the inner edge opening 3M of the liner plate 2 which is closed between the outer walls.
A chute 1e having an approximately L-shaped portion is formed, and a lower outlet 1b is formed.
Locking pieces 1c made of round steel or flat plates of the required size at both ends
are fixed by welding, and the locking pieces 1c are inserted and attached to both ends of the opening 3 on the inner edge of the liner plate 2. At the same time, the transport pipe 1h of the concrete pump car is inserted and connected to the upper method inlet 1a, and the concrete pump car ( (not shown) transport pipe 1h
, the concrete 14 is poured into the hole wall 11 and the liner plate gap 12 through the chute le.

FIG. 1 is a diagram in which the bottom mounting member 15 is fastened to the bottom of the liner plate 2 installed along the fragile ground 11a of the hole wall 11, and the chute 1e is connected to the opening 3 via the engagement piece IC. This shows a state in which the inflow of earth and sand and stone blocks 13 into the inside of the plate 2 is prevented.

In other words, during pile hole excavation work, earth and sand and stone blocks 13 are removed from the hole wall 11.
Even if it collapses, it falls below the inclined plate 4 of the liner plate 2 as shown in the figure, and does not enter the inside of the liner plate 2.

Therefore, the danger of falling earth and sand and stone blocks is eliminated, and the work environment is not deteriorated, making it possible to improve work efficiency.

During concrete pouring, the concrete 14 flows down to the outside of the liner plate 2 relatively smoothly along the slope 4 through the transport pipe 1h and the shoe 1e, so that the gap 12 can be filled with the concrete 14.

In order to more uniformly place concrete, it is desirable to move the opening 3 of the concrete inlet as appropriate.

After curing, the chute 1et is removed, and then the bottom mounting member 1
5 is removed from the liner plate, the bottom surface of the liner plate is continuously dug, and the above operation is repeated one after another in the horizontal direction and then in the vertical direction.

In addition, if necessary, vibration can be applied to the side plates of the chute as described in Example (2) above to improve the sluggishness in the chute and improve work efficiency without adversely affecting the quality of the concrete. can.

As mentioned above, it has a particularly remarkable effect when it comes into contact with fragile sandy soil or talus ground during pile hole excavation work and aims to partially stabilize the hole wall.

Liner plates are buried in series at the required depth, and once construction is complete, concrete is poured into the liner plates and solidified to be used as piles.

Effects of the Invention When the present invention is used in the deep foundation construction method, the concrete falling member has a simple structure and is lightweight, the chute can be easily attached by inserting and fastening the engaging piece, and it can be used in areas with weak ground. In addition to reinforcing the
The gap between the hole and the hole wall is uniformly and reliably filled with concrete, and furthermore, it has remarkable effects such as significantly improving work efficiency.

[Brief explanation of the drawing]

FIG. 1 is an explanatory view of the operation of fastening the bottom mounting member to the liner belt used in the present invention and attaching the concrete falling member to the opening. FIG. 2 shows an example of a liner plate used in the present invention, and is a perspective view seen from the outside. FIGS. 3(A), CB), and <C> are sectional views showing modified examples of the liner plate used in the present invention. FIGS. 4(A) and CB) are perspective views showing concrete falling members used in the present invention. FIG. 5 is a perspective view showing a concrete lower member in which the outlet of the lower part 51 is bifurcated. FIG. 6 is a perspective view showing another embodiment in which a vibrating piece is attached to a concrete falling member. FIG. 7 is a perspective view showing a bottom mounting member used in the shaft liner plate of the present invention. FIGS. 8(A), 8(B), and 8(C) are side views showing modified examples of the bottom mounting member used in the present invention. FIG. 9 is an action explanatory diagram showing a method for stabilizing fragile ground using a shaft liner plate, a bottom mounting member, and a concrete (1) lower member. 1: Concrete bottom member, 1a: Upper inlet. 1b=lower outflow port・1c: locking plate, 1d: side plate・1e:
Chute, 1f: notched groove, 1g: insertion hole. 1h: Transport pipe 2 Ni liner 1 plate, 2a: Upper and lower flanges, 3
: opening part, 4: inclined part, 5: streak part, 5a: minor streak part, 5b: major streak part, 6: reinforcing material. 7: Plate body reinforcement plate, 8: Outer frame, 9: Bolt fastening hole. 10a: Bolt wlOb: Naft, 11: Hole wall. 11a: Weak ground, 12: Gap, 13: Stone block, 14: Concrete), 15: Bottom mounting member, 16: Vibration piece

Claims (3)

[Claims] (1) In a plate body of a liner plate for a shaft, which is assembled into a casing of an arbitrary cross-sectional shape by sequentially connecting the left and right and upper and lower end faces, an opening having an inclined part that connects the inside and outside and bulges downward, upward, and inward. At both ends of the inner edge,
The lower outlet is made smaller than the upper inlet to form an approximately L-shaped chute, and a locking piece is provided at the lower outlet, and the locking piece is removably attached to the opening of the liner plate, and the hole wall and liner A concrete flow member for a liner plate for a vertical shaft that flows concrete into the gap between the plates. (2) The concrete flowing down member of a liner plate for a vertical shaft according to claim 1, wherein the lower outlet of the chute is bifurcated. (3) While assembling a cylindrical casing with an arbitrary cross-sectional shape by sequentially connecting liner plates with openings facing downward from the inside to the outside inside the mine at the left and right sides as well as the top and bottom end surfaces, in the required position, Fasten the bottom mounting member to the bottom of the liner plate, attach the concrete flow member of the liner plate for shafts to the inner edge of the opening of the liner plate, and pour concrete into the gap between the hole wall of the weak ground and the liner plate. A method of using liner plates in deep foundation construction, which is characterized by pouring concrete into a casing and using it as a foundation pile.