Title of Invention

" AN UNDERGROUND BEAM CONSTRUCTION FRAME"

Abstract An underground beam construction frame comprising two steel plates (2) with inverted square-C cross-sectional shapes laid out in parallel at a given distance therebetween; and square-shaped angles (3) which have holes (5) for coupling bolts (4) formed therein and are fitted into both end portions of said steel plates (2), thereby forming a frame body (7) inside which a reinforcing arrangement of reinforcement (8) is provided, characterized in that an intermediate portion (la) of said frame body (7) is bent, a joint plate (13) with fixed anchor bolts (12) is attached to an inner portion of said intermediate portion (la), a base plate (15) with an upright column provided on a top surface thereof is set on a top portion of said intermediate portion (la), and said base plate (15) and said joint plate (13) are secured to said frame body (7) with said anchor bolts (12). Fig. 1
Full Text The present invention relates to an underground beam construction frame.
The present invention relates to an underground beam construction frame and an underground beam constructing method using the same. DESCRIPTION OF THE RELATED ART
A conventional underground beam constructing method is carried out as follows. First, as shown in Fig. 7, excavation is performed to excavate an excavation portion 100. Next, as shown in Fig. 8, a rubble work is performed to lay and tamp rubble 101 or the like on the bottom of the excavation portion 100. Then, as shown in Fig. 9, concrete subslabbing and setting-out are carried out to lay a concrete subslab 102 thin and ink the position of an underground beam or the like.
Next, as shown in Fig. 10, a bar arrangement work is performed in which multiple reinforcing bars 103 are arranged at predetermined heights and widths. Reference numeral "104" indicates stands like concrete blocks on which the reinforcing bars 103 are laid.
Next, as shown in Fig. 11, a formwork is performed in which a form 105 comprised of plates is assembled in such a way as to surround the reinforcing bars. Then, ready-mixed, concrete is poured in the form 105, and after the ready-mixed concrete is hardened, the form 105 is disassembled, and backfilling is performed.
Because the conventional constructing method requires that the reinforcing bars and the frame should be built up manually at the site, however, the overall work needs considerable labor and time. Further, the conventional
form needs to be disassembled, so that the construction work should normally be stopped for a couple of days until the disposed ready-mixed concrete is hardened, resulting in a poor working capacity. The need to disassemble the form before backfilling takes an extra labor and time. All in all, the conventional constructing method reguires considerable labor and time, and suffers a poor working capacity. This leads to prolongation of the term of construction and cost increase.
SUMMARY OF THE INVENTION
Accordingly, it is an objective of the invention to provide an underground beam construction frame which contributes to making the term of construction of an underground beam significantly shorter and making the cost significantly lower than the prior art, and an underground beam constructing method which uses the underground beam construction frame.
According to the first aspect of the invention, there is provided an underground beam construction frame comprising two steel plates with inverted sguare-C cross-sectional shapes laid out in parallel at a given distance therebetween; and sguare-shaped angles which have through holes for coupling bolts formed therein and are fitted into both end portions of the steel plates, thereby forming a frame body inside which an adeguate of reinforcing bars is provided.
In the underground beam construction frame, an intermediate portion of the underground beam construction frame is bent, a joint plate with fixed anchor bolts is attached to an inner portion of the intermediate portion, a base plate with an upright column provided on a top surface thereof is set on a top portion of the intermediate portion,
and the base plate and the joint plate are secured to the frame body with the anchor bolts.
In the underground beam construction frame, an intermediate portion of the underground beam construction frame is bent, an upper support plate for a column is secured to a top portion of the intermediate portion, a lower support plate is secured to a bottom portion of the intermediate portion, and the column is secured to the upper support plate and the lower support plate so as to be secured to the frame body.
In the underground beam construction frame, an underground beam construction frame with an angle at one end removed is attached to an intermediate portion of the underground beam construction frame, a joint plate with fixed anchor bolts is attached to an inner portion of the intermediate portion, a base plate with an upright column provided on a top surface thereof is set on a top portion of the intermediate portion, and the base plate and the joint plate are secured to the frame body with the anchor bolts.
In the underground beam construction frame, an underground beam construction frame with an angle at one end removed is attached to an intermediate portion of the underground beam construction frame, an upper support plate for a column is secured to a top portion of the intermediate portion, a lower support plate is secured to a bottom portion of the intermediate portion, and the column is secured to the upper support plate and the lower support plate so as to be secured to the frame body.
According to the second aspect of the invention, there is provided an underground beam constructing method comprising the steps of preparing two steel plates with inverted square-C cross-sectional shapes; laying the steel
plates in parallel at a given distance therebetween; then fitting square-shaped angles which have through holes for coupling bolts formed therein into both end portions of the steel plates, thereby forming a frame body; providing an adequate arrangement of reinforcing bars inside the frame body; and then casting ready-mixed concrete in the frame body and hardening the ready-mixed concrete.
The underground beam construction frame and the underground beam constructing method according to the invention can eliminate a work of assembling reinforcing bars and a work of assembling and disassembling a form at the site, which are required in the conventional constructing method. Further, the underground beam construction frame is completed with ready-mixed concrete cast in the frame made by steel plates arranged at a predetermined distance. Therefore, the underground beam construction frame in the completed state can be used immediately as a permanent structure for an expressway, a pier or the like.
Backfilling can be executed immediately after or before ready-mixed concrete is cast in the form.
Therefore, the invention does not require considerable labor and time as in the prior art, and can significantly shorten the term of underground beam construction and reduce the cost of the construction. According to the modifications of the first aspect of the invention, in particular, the underground beam construction frame of the invention and the column can be secured quickly at the site.
The present invention relates to an underground beam
construction frame comprising: two steel plates with inverted square-
C cross-sectional shapes laid out in parallel at a given distance
therebetween; and square-shaped angles which have holes for
coupling bolts formed therein and are fitted into both end portions of
said steel plates, thereby forming a frame body inside which a
reinforcing arrangement of reinforcement is provided, characterized in
that an intermediate portion of said frame body is bent, a joint plate
with fixed anchor bolts is attached to an inner portion of said
intermediate portion, a base plate with an upright column provided on
a top surface thereof is set on a top portion of said intermediate
portion, and said base plate and said joint plate are secured to said
frame body with said anchor bolts.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Fig. 1 is a perspective view of an underground beam construction frame according to the invention;
Fig. 2 is an explanatory diagram of an undergroundbeam constructing method which uses the underground beam construction frame shown in Fig. 1;
Fig. 3 is a perspective view of an underground beam construction frame which is used at a portion of securing a column;
Fig. 4 is a perspective view of an underground beam construction frame which is used at a portion of securing a column;
Fig. 5 is an explanatory diagram of an underground beam construction frame which uses anchor bolts, and a structure of fixing a column;
Fig. 6 is an explanatory diagram of an underground beam construction frame which involves welding, and a structure of fixing a column;
Fig. 7 is an explanatory diagram of a conventional underground beam constructing method, showing an excavated portion;
Fig. 8 is an explanatory diagram of the conventional underground beam constructing method, showing a rubble work ;
Fig. 9 is an explanatory diagram of the conventional underground beam constructing method, showing a concrete subslab cast;
Fig. 10 is an explanatory diagram of the conventional underground beam constructing method, showing an arrangement of reinforcing bars made; and
Fig. 11 is an explanatory diagram of the conventional underground beam constructing method, showing a form assembled.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
According to the best mode of forming an underground beam construction frame of the invention, a pair of steel
plates with inverted square-C cross-sectional shapes are laid out at the same height in parallel at a given distance kept therebetween with their open sides facing each other, square-shaped angles, which have through holes for coupling bolts formed therein at required locations, are fitted into both lengthwise-directional end portions of the steel plates, thereby forming a frame body, and an adequate arrangement of reinforcing bars is provided inside the frame body.
According to the best mode of working out an underground beam constructing method of the invention, a pair of steel plates with inverted square-C cross-sectional shapes are prepared, and laid out at the same height in parallel at a given distance kept therebetween with their open sides facing each other, and square-shaped angles, which have through holes for coupling bolts formed therein at required locations, are fitted into both lengthwise-directional end portions of the steel plates, thereby forming a frame body, after which an adequate arrangement of reinforcing bars is provided inside the frame body, the frame body is placed on concrete, and then ready-mixed concrete is cast in the frame body for hardening.
Preferred embodiments of the invention will now be described referring to the accompanying drawings.
(First Embodiment)
Fig. 1 is a perspective view of an underground beam construction frame according to the invention, Fig. 2 is an explanatory diagram of an underground beam constructing method which uses the underground beam construction frame shown in Fig. 1, Fig. 3 is a perspective view of an underground beam construction frame which is used at a portion of securing a column, Fig. 4 is a perspective view
of an underground beam construction frame which is used at a portion of securing a column, Fig. 5 is an explanatory diagram of an underground beam construction frame which uses anchor bolts, and a structure of fixing a column, and Fig. 6 is an explanatory diagram of an underground beam construction frame which involves welding, and a structure of fixing a column.
In the diagrams, an underground beam construction frame 1 comprises a frame body 7 and a reinforcing arrangement 8, which will be discussed later. A pair of steel plates 2 have the same size and the same shape and have predetermined lengths. As each steel plate 2 has an upper end and a lower end bent in the same direction, its axial cross section has an inverted square-C shape. The steel plates 2 are laid out in parallel at a given distance L, with the open sides facing each other, so that the upper-ends of both steel plates 2 are in parallel to each other.
Square-shaped angles 3 are fitted in both lengthwise-directional end portions of the pair of the steel plates 2, and are welded. From the viewpoints of enhancing the overall strength and the fixed strength, the axial cross sections of the angles 3 have L shapes in the embodiment. Holes 5 for insertion of coupling bolts 4 to couple adjoining underground beam construction frames 1 together are provided in each angle 3 at required locations. Reference numeral "6" denotes locknuts which are screwed onto the associated coupling bolts 4.
The pair of steel plates 2 and the square-shaped angles 3 constitute the frame body 7. The height and width of the frame body 7 are adequately determined according to the underground beam to be constructed.
The reinforcing arrangement 8 is built by properly combining reinforcing bars 8a laid along the lengthwise

direction of the frame body 7, reinforcing bars 8b laid perpendicularly in orthogonal to the lengthwise direction of the frame body 7, and reinforcing bars 8c laid horizontally in orthogonal to the lengthwise direction of the frame body 7.
(Second Embodiment)
An underground beam constructing method using the underground beam construction frame 1 will be discussed below referring to Fig. 2.
The excavation work, the rubble work, concrete subslabbing and setting-out are carried out in the same way as done in the conventional construction. According to the present constructing method, the underground beam construction frame 1 manufactured in a factory beforehand is placed on a concrete subslab, then ready-mixed concrete (not shown) is cast in the frame body 7 and hardened.
This method can eliminate the work of building up reinforcing bars and a form at the site as done in the prior art, and can thus save unnecessary labor and time and increase the working capacity.
Because an underground beam is constructed with the underground beam construction frame 1 staying as it is, unlike in the prior art, the underground beam construction frame 1 need not be disassembled. It is unnecessary to wait for ready-mixed concrete to become hard unlike in the prior art, and backfilling can be done immediately after or before ready-mixed concrete is cast in the form.
These features can save labor and time needed, in disassembling a form, and can significantly shorten the term of underground beam construction and reduce the cost of the construction.
Reference numeral "9" denotes members which are used
at the time of placing the underground beam construction frame 1 on the concrete subslab. Each member 9 in use comprises a steel plate 10 having an L-shaped cross section and fixed to the lower portion of a side of the frame body 7, and a level adjusting bolt 11 fixed to the concrete subslab in the embodiment.
(Third Embodiment)
When an underground beam is constructed by using the underground beam construction frame according to the invention, the column is secured at the corner portions, a portion where beams cross, etc. In this case, it is desirable to use an underground beam construction frame discussed below, which can ensure faster securing.
Fig. 3 shows an underground beam construction frame 1 designed to secure the column at an intermediate portion la where the underground beam construction frame 1 is bent at right angles, and Fig. 4 shows an underground beam construction frame 1 designed to secure the column at an intermediate portion lb where beams cross.
In the case of Fig. 3 where the column is secured at the intermediate portion la, the underground beam construction frame 1 is designed to have an L-shaped top view. In the case of Fig. 4 where the column is secured at the intermediate portion lb at which beams cross, the underground beam construction frame 1 is designed to have a T-shaped top view, and with an angle at one end removed, one underground beam construction frame 2n is attached to the other underground beam construction frame.
As shown in Fig. 5, a joint plate 13 having fixed anchor bolts 12 is fixed to the top side of the frame body 7 at predetermined locations, and the anchor bolts 12 are inserted into anchor bolt insertion holes 16 provided in a
base plate 15 with an upright column 14 provided on the top surface thereof, and are secured there with nuts 17 screwed onto the anchor bolts 12.
In Fig. 4, reference numeral "7a" denotes bolt insertion holes provided in the frame body 7, and reference numeral "13a" denotes anchor bolt insertion holes provided in the joint plate 13. The anchor bolts 12, inserted in the associated anchor bolt insertion holes 13a, should be welded to the joint plate 13 in a factory beforehand. Reference numeral "13b" is a ready-mixed concrete deposition hole provided in the center portion of the joint plate 13.
As the other structure is the same as that of the underground beam construction frame 1, its detailed description is omitted, with same reference numerals given to those components which are the same as the corresponding components of the underground beam construction frame 1.
(Fourth Embodiment)
Referring to Fig. 6, a description will now be given of a case where a column is secured to the intermediate portion la shown in Fig. 3 or the intermediate portion lb shown in Fig. 4.
In the embodiment, an upper support plate 19 and a lower support plate 20 are secured to the lower end portion of a column 18 by welding, the column 18 is laid perpendicularly at a column fixing location of the frame body 7, and the two support plates 19 and 20 are welded and secured to the top portion and bottom portion of the frame body 7, respectively. A column body 18A is secured to the top portion of the column 18 by welding.
As the other structure is the same as that of the underground beam construction frame 1, its detailed
description is omitted, with same reference numerals given to those components which are the same as the corresponding components of the underground beam construction frame 1.





I CLAIM:
1. An underground beam construction frame comprising:
two steel plates (2) with inverted square-C cross-sectional shapes laid out in parallel at a given distance therebetween; and
square-shaped angles (3) which have holes (5) for coupling bolts (4) formed therein and are fitted into both end portions of said steel plates (2), thereby forming a frame body (7) inside which a reinforcing arrangement of reinforcement (8) is provided, characterized in that an intermediate portion (la) of said frame body (7) is bent, a joint plate (13) with fixed anchor bolts (12) is attached to an inner portion of said intermediate portion (la), a base plate (15) with an upright column provided on a top surface thereof is set on a top portion of said intermediate portion (la), and said base plate (15) and said joint plate (13) are secured to said frame body (7) with said anchor bolts (12).
2. The underground beam construction frame as claimed in claim
1, wherein an underground beam construction frame with an angle at
one end removed is attached to an intermediate portion of said
underground beam construction frame, a joint plate with fixed anchor
bolts is attached to an inner portion of said intermediate portion, a
base plate with an upright column provided on a top surface thereof is
set on a top portion of said intermediate portion, and said base plate
and said joint plate are secured to said frame body with said anchor
bolts.
3. The underground beam construction frame as claimed in claim
2, wherein said underground beam construction frame with an angle
at one end removed is attached to an intermediate portion of said underground beam construction frame, an upper support plate for a column is secured to a top portion of said intermediate portion, a lower support plate is secured to a bottom portion of said intermediate portion, and said column is secured to said upper support plate and said lower support plate so as to be secured to
said frame body.
4. An underground beam construction frame substantially as
hereinbefore described with reference to and as illustrated in the
accompanying drawings.


Documents:

2189-del-2004-abstract.pdf

2189-del-2004-claims.pdf

2189-del-2004-complete specification(granted).pdf

2189-DEL-2004-Correspondence Others-(22-03-2011).pdf

2189-DEL-2004-Correspondence-Others-(30-09-2009).pdf

2189-del-2004-correspondence-others.pdf

2189-del-2004-correspondence-po.pdf

2189-del-2004-drawings.pdf

2189-del-2004-form-1.pdf

2189-del-2004-form-13.pdf

2189-del-2004-form-18.pdf

2189-del-2004-form-2.pdf

2189-DEL-2004-Form-27-(22-03-2011).pdf

2189-DEL-2004-Form-3-(30-09-2009).pdf

2189-del-2004-form-3.pdf

2189-del-2004-form-5.pdf

2189-del-2004-gpa.pdf

2189-del-2004-petition-138.pdf

abstract.jpg


Patent Number 243239
Indian Patent Application Number 2189/DEL/2004
PG Journal Number 41/2010
Publication Date 08-Oct-2010
Grant Date 30-Sep-2010
Date of Filing 03-Nov-2004
Name of Patentee HIROSI OKADA
Applicant Address 917 SHIRAHATA,SAMMU CITY, CHIBA,PREF.,JAPAN
Inventors:
# Inventor's Name Inventor's Address
1 HIROSI OKADA 917 SHIRAHATA,SAMMU CITY, CHIBA,PREF.,JAPAN
PCT International Classification Number B65G 21/00
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 JP2004-2476 2004-01-07 Japan