JP2959502B2 - Method of constructing perforated pipeline for CC box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to an electric wire joint groove for accommodating electric wires such as electric power, communication and optical fibers, and is used as a C.C.C.C. The present invention relates to a method for constructing a perforated conduit for a BOX.

[0002]

2. Description of the Related Art At present, as a configuration of a commonly used underground C.C.BOX (wire common groove), a PVC pipe is mainly used. However, it is necessary to lay concrete for reinforcing pipes at crossings of roads and on sidewalks where vehicles enter parking lots and the like in order to cope with load conditions. At this time, the amount of concrete used is generally small, but this work takes days to assemble or dismantle the temporary frame, cure concrete for casting, etc. Often occurs.

[0003] Further, since this kind of construction work is often performed mainly at night, for example, a concrete mixer truck has to wait for a long time at a site, so that it is not profitable as a trader, and the point of supply of concrete and materials. The unit price is high and there are many problems.

[0004] In view of the above situation, the development of perforated pipelines using raw materials other than vinyl chloride, such as porcelain pipes and concrete pipelines, has been promoted. Conditions are strict, such as the need for airtightness for waterproofing, a reduction in the coefficient of friction in the conduit for drawing in wires, and an improvement in workability for shortening the construction period, and the development of products that meet these requirements has been delayed.

[0005]

For example, in the construction of a conventional concrete perforated pipe, a perforated pipe is suspended one by one into a buried trench excavated at a work site, and then sequentially carried out. The assembling method is adopted, which is a troublesome work. Particularly, in urban areas, etc., since the transport of the perforated pipe structure is mainly carried out at night, only a short working time of about 3 to 4 hours can be taken, and severe working conditions such as in a narrow work space of the site. It is actually a very difficult technique to increase the assembly accuracy below, and it was impossible to significantly reduce the working time.

In view of the above-mentioned circumstances, the present invention lifts and installs a plurality of concrete perforated pipes which have been assembled in advance at a predetermined buried place in a factory or on site using a dedicated hanging jig. By doing so, it is an object of the present invention to provide a method for constructing a C, C, and BOX porous channel that solves the above-mentioned problems.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a concrete, precast, C, C, and BOX perforated conduit used for the construction of an underground buried electric wire joint trench, by digging a predetermined width and grading the ground. , laying precast steel foundation plate over the rolling pressure basal crushed stone, on the base mat, and necessary number sequence
A set of perforated pipe blocks, which are assembled as a single unit with a dedicated lifting jig for several perforated pipe blocks in advance, are lifted with heavy equipment and installed as many as required.After several blocks are installed, PC steel materials are inserted at once and tightened. The above-mentioned hanging jig dedicated to several blocks is removed and a predetermined backfill is performed.

Further, a concrete precast C / C / BO used for the construction of an electric wire joint trench to be buried underground.
In the perforated pipeline for X, excavation of a predetermined width was performed, and a precast foundation slab was laid on the ground crushed and compacted foundation crushed stone,
On the base plate, end plates are arranged at both ends of a group of perforated tube blocks which are preliminarily tightened by inserting a PC steel material into perforated tube blocks arranged in a required number. A block-specific hanging jig is mounted and integrated with a heavy machine to lift and install, and then the several blocks-specific hanging jig is removed and a predetermined backfill is performed.

In this way, when the buried trench excavated at a predetermined buried site is leveled, and the precast foundation slab is laid on the crushed foundation crushed stone, and then divided into several lots for construction, The required number of perforated pipe blocks are arranged in the inside, a hanging jig dedicated to several blocks is placed on the upper surface, and each perforated pipe block is assembled and assembled integrally with mounting bolts and the like. Jig,
It is lifted all at once with heavy equipment and carried into the buried trench, where it is installed on the base slab. After the installation of the predetermined number of perforated pipe blocks is completed, the PC steel material is inserted into the perforated pipe blocks, and they are collectively tightened, and finally the grooves are backfilled, so that a perforated pipe channel can be constructed within a limited working time on site.

[0010] Further, in the construction of a short conduit in which the installation of a plurality of perforated pipe blocks is completed in one lot, the work of integrating the plurality of perforated pipe blocks is carried out in advance using a PC steel material in a factory. Is what you do. That is, a PC steel material is inserted into the sheath holes of the required number of perforated tube blocks, and a predetermined tie is made to assemble to form a perforated tube block group. Further, end plates are disposed at both ends, and a hanging jig dedicated to several blocks is placed on the upper surface of the perforated tube block group to be integrated. After being transported to the site, it is lifted all at once with a heavy machine and carried into the buried groove, where it is installed on the base slab. For this reason, the construction of the perforated pipeline completed within a limited working time can be simplified, and the quality control and the like can be facilitated because the PC steel material is bonded to the plurality of perforated pipe blocks in the factory.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following is a description of an apparatus for directly implementing the method for constructing a C / C / BOX porous pipe of the present invention with reference to the drawings.

FIGS. 1 to 6 show six cable insertion holes and two cable insertion holes.
An embodiment is shown in which a plurality of concrete perforated pipe blocks provided with a sheath hole are directly assembled with a hanging jig dedicated to several blocks. Reference numeral 1 denotes a longitudinal direction in which the cable insertion holes 2 are disposed at six positions in two vertical stages, and the cable insertion holes 2
A concrete C / C / BOX perforated tube block which is a prismatic underground structure having PC steel insertion sheath holes 3 disposed on the left and right portions at the upper and lower middle positions of the perforated tube block 1. In addition, hanging holes 4 are provided at least at two places in front and back of the upper surface 1a.
And connection keys 5a, 5b of male and female fitting for bonding positioning are attached to both connection end surfaces 1b, 1b. 6
Is a hanging jig dedicated to several blocks formed from an angle or the like having a length of a perforated tube block group 1 '(for example, five in FIG. 1) arranged in a required number. The perforated pipe block 1 is provided on the left and right horizontal suspension sides 6a.
A plurality of stop holes 7 corresponding to the respective suspension holes 4 are formed, and the suspension shafts 8 are horizontally disposed at appropriate positions of the suspension beam 6b folded at right angles.

Here, the construction of a perforated concrete conduit is carried out at an intersection of a road or a sidewalk at a location where a vehicle enters, or at a load larger than the ground (for example, T-load).
(Equivalent to 25 loads).

For example, when constructing a perforated pipeline in the ground at an intersection A of a road as shown in FIG. 6, a plurality of concrete perforated pipe blocks 1 corresponding to the width of the road are buried to form the perforated pipeline. I do. In this case, first, a buried trench 9 having a predetermined length, width, and depth is excavated in advance, and then the bottom of the trench is subjected to leveling such as unevenness adjustment, and the basic crushed stone 10 is spread to a constant thickness and appropriately laid. Then, after forming a sand layer 11 on the upper surface, a precast base plate 12 is laid.

Here, a number of concrete perforated pipe block groups 1 'corresponding to the length to be buried are lifted at once and installed.

In this case, when the lifting operation of the perforated tube block group 1 'cannot be completed in one lot construction due to the site conditions and the construction length, it is performed by dividing into several lots. In this divisional construction mode, for example, as shown in FIG. 1, an appropriate number (five in the figure) of perforated pipe blocks 1 are arranged in a factory, and a predetermined length (block The number of hanging jigs 6 dedicated to several blocks are placed, and the stop holes 7 arranged on the hanging sides 6 a on both sides of the hanging jig 6 dedicated to several blocks are aligned with the hanging holes 4 of each porous tube block 1. Then, the mounting bolts 13 are screwed into the places, and each perforated pipe block 1 is directly assembled (directly attached) to the hanging jig 6 dedicated to several blocks. In this manner, the perforated pipe block group 1 'integrated with the hanging jig 6 dedicated to several blocks in the factory is transported on-site while being mounted on a truck bed or the like in this state (if necessary, the perforated pipe The assembly of the block 1 and the hanging jig 6 dedicated to several blocks may be assembled on site.)

Thereafter, the perforated pipe block group 1 'integrated by the hanging jig 6 dedicated to several blocks is lifted by a heavy machine (not shown) such as a crane provided separately. At this time, the suspension wire 15 guided from the support beam 14 connected to the heavy equipment is balanced and hanged on the appropriate number of the horizontal suspension shafts 8 arranged above the suspension jig 6 dedicated for several blocks. It is lowered (however, the factory is assembled until the support beam 14 is arranged).

Here, the heavy equipment is appropriately operated to support the support beam 14.
Is lifted and moved to a position above the embedding groove 9, and is lowered just above the installation base plate 12 to seat the porous tube block group 1 ′. Next, if the hanging jig 6 dedicated to several blocks integrally assembled with the perforated tube block group 1 'is removed by performing the reverse operation, the perforated tube block group 1' is installed on the base plate 12, and the perforated tube passage 16 is constructed. You.

If the installation work of the perforated pipe line 16 does not reach the desired length in one lot application, the lifting work of the perforated pipe block group 1 'of a predetermined unit may be repeated as described above. For example, the explanatory view shown in FIG. 11 is an example in which the lifting of the perforated pipe block group 1 'is repeated twice to construct a perforated pipe channel.

If the situation at the work site permits, the number of perforated pipe blocks 1 is set to the maximum that can be placed on the truck bed (for example, in the embodiment shown in FIG. 12, ten perforated pipe blocks 1 are assembled). In this case, the length of the hanging jig 6 dedicated to several blocks is also a large type formed of a long steel material corresponding to a predetermined number of perforated pipe blocks 1. The tube block 1 is assembled into a perforated tube block group 1 '. In this mode, a large heavy machine is used for lifting.

After the installation of the predetermined number of perforated pipe blocks 1 on the base plate 12 is completed, the corrosion-resistant PC steel material 17 is inserted into the sheath hole 3 of the perforated pipe block 1 to be communicated with the known means. If it is fastened, the perforated conduit 16 is formed, and a predetermined backfill of the buried groove 9 may be performed last.

FIG. 13 shows another embodiment in which the installation of the perforated pipe block group is completed in one lot.

In this case, the assembling mode completes the fastening of the PC steel 17 in the factory. That is, first, the PC steel material 17 is inserted into the sheath holes 3 of the plurality of the perforated tube blocks 1.
Is inserted and fastened by known means to form the assembled porous tube block group 1 'in advance. Further, the end plate 18 is arranged at both ends of the perforated tube block group 1 'so as to close the end plate,
A bolt 24 is screwed into an appropriate position of the end plate 18 so that the adjacent perforated
Fix to tube block 1 . Thereafter, several block-specific hanging jigs 6 of a predetermined length are attached to the center of the upper surface of the perforated tube block group 1 'with the mounting bolts 13 in the same manner as described above to be integrated. The end plate 18 is also provided with a cable insertion hole 2 ′, and is in communication with the cable insertion hole 2 of the perforated tube block 1. In the figure, reference numeral 25 denotes a connection sleeve.

Next, the perforated pipe block group 1 'with the integrated end plate 18 assembled at the factory is shipped, and the perforated pipe block group 1' is loaded from the truck bed at the burial site in the same manner as described above. Is appropriately lifted by a heavy machine, carried into the buried groove 9 and installed on the base plate 12. After the installation is completed, the hanging jig 6 dedicated to several blocks is removed, and then a predetermined embedding work is performed.

In this embodiment, a plurality of perforated tube blocks 1
In the factory, the PC steel 17 is inserted in the factory to perform predetermined fastening, so that airtightness and the like are reliably maintained, quality control is easy, and the tightening work of the PC steel at the site is omitted. This in turn leads to simplification of construction.

In another embodiment shown in FIGS. 7 and 8,
This is a mode in which a special instruction is given to apply a slip preventing means when several perforated pipes are stacked. In this case,
The periphery of several perforated pipes 16 stacked on the left and right is fixed to the base plate 12 with a support frame member 19 having a predetermined width and used as a slip stopper 21 (note that the slip stopper is not used in normal construction).

Here, similarly to the above, a perforated tube block group 1 'which is stacked on the base plate 12 through a predetermined installation process.
A frame-shaped support frame member 19 that surrounds the outer periphery of the several upper and lower perforated pipelines 16 is partially orthogonally framed and fixed to the base plate 12. The configuration of the support frame member 19 is, for example, that the angled material is cut into appropriate lengths and stacked,
Are welded sequentially so as to conform to the outer peripheral shape a of the above to form an integrated product. In order to fix the support frame member 19, if the fixing bolts 20 inserted into the mounting pieces 19a provided at both lower ends are screwed into the base plate 12 and stopped, several perforated pipelines 16 are so-called frame-tightened. It is fixed to the base plate 12 and does not move even when subjected to vibration such as an earthquake.

FIGS. 9 and 10 show another embodiment of the slip preventing means. In this case, the structure of the slip prevention means is a mode using a stainless steel belt 22 having a predetermined width. A flexible stainless steel belt 22 having a predetermined length is wound around the perimeter of the perforated pipe line 16 composed of the perforated pipe block group 1 'stacked on the base plate 12 in the same manner as described above, and is fixed to both end mounting pieces 22a of the belt 22. Fixing bolt 23 for angle 23
At 0, it is fixed to the base plate 12. Since the belt itself is flexible in this belt-type slip-preventing means 21 ', the band can be freely tightened irrespective of the stacking shape, and does not require frame processing such as cutting and welding of steel material as in the above embodiment. , Simple use.

Thereafter, the predetermined buried groove 9 may be back-filled with the slip preventing means provided.

[0030]

As described above, in the method for constructing a perforated pipe for C / C / BOX according to the present invention, a buried groove for a perforated pipe block is excavated, and a precast base plate is laid on a ground crushed and compacted foundation crushed stone. Then, a required number of perforated pipe blocks are assembled into a factory with a dedicated hanging jig for several blocks in advance, and the integrated perforated pipe block group is transported to the site, and the dedicated hanging jig for several blocks is lifted by a heavy machine and loaded onto the base plate. To install it all at once,
Unlike the conventional construction method in which the perforated tube blocks are lifted one by one and installed on the foundation plate, remarkable reduction in working time is achieved. At this time, since the plurality of perforated pipe blocks are individually mounted on the hanging jigs dedicated to several blocks, the cable insertion holes, the sheath holes, etc. do not shift, and after the installation of the predetermined length, all the blocks are collectively finally finished. Tightening but easy work such as insertion and tightening of PC steel material can obtain a reliable perforated conduit. In addition, since the perforated tube block group is unitized in a factory assembly using hanging jigs dedicated to several blocks, it is possible to ensure quality control and facilitate shipping and transportation. Of course, when the installation work is not completed in one lot construction, it is sufficient to repeat the divisional construction, and it will be a one-size-fits-all method that will eliminate the complexity of on-site work. A predetermined accuracy can be ensured without any work.

When the installation work is completed in one lot, a perforated pipe block group of a required length is provided in the factory by a PC.
Pre-assembled with steel materials, end plates are arranged on both sides of the perforated tube block group, and several blocks dedicated hanging jigs are attached to this, so the work of bonding PC steel materials on site is wiped out and airtightness is further improved Thus, a predetermined accuracy can be easily secured.

Further, if this construction method is adopted, the work time is short, so that the lining and the construction period can be shortened on the same day, and the construction cost can be greatly reduced. Needless to say, since the positioning tube shear key is used for joining the perforated pipe blocks and the PC steel material is used for the bonding, it is possible to obtain the effect of sufficiently maintaining the strength against land subsidence and earthquake.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of an apparatus for implementing a method of constructing a porous pipeline for CC BOX of the present invention.

FIG. 2 is a front view of a C / C / BOX porous tube.

FIG. 3 is a plan view of the perforated tube.

FIG. 4 is a perspective view of a hanging jig dedicated to several blocks.

FIG. 5 is a front view in which a hanging jig dedicated to several blocks is attached to a perforated tube block.

FIG. 6 is an explanatory diagram of embedding a perforated pipe block group on a road at an intersection.

Fig. 7 Laying foundation crushed stone, sand layer and foundation slab in buried trench,
FIG. 5 is an explanatory view in which a plurality of perforated pipes are installed thereon and fixed by means of a stopper for a support frame member.

FIG. 8 is a side view of the main part.

FIG. 9 is an explanatory view showing another embodiment in which a perforated pipe installed on a basic crushed stone is fixed by a belt-shaped slip preventing means.

FIG. 10 is a side view of the main part.

FIG. 11 is an explanatory view of assembling five perforated tube blocks with a single hanging jig dedicated to several blocks and repeating the lifting operation.

FIG. 12 is an explanatory view in which ten porous tube blocks are assembled and lifted by a single hanging jig dedicated to several blocks.

FIG. 13 shows another embodiment which is completed by one lot construction,
In the factory, a plurality of perforated pipe blocks are tied with PC steel ,
It is explanatory drawing which assembles the lifting jig only for several blocks to the thing which has the end plate arrange | positioned at both ends, and lifts.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 perforated pipe block 1 ′ perforated pipe block group 4 hanging hole 6 several-block hanging jig 7 stop hole 9 buried groove 10 basic crushed stone 11 sand layer 12 precast base plate 16 perforated pipe line 18 end plate

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Keiichi Kobayashi 4 at 13-13 Arakicho, Shinjuku-ku, Tokyo Inside the Concrete Industry Co., Ltd. (72) Inventor Jiro Kondo 4th residence at 13-13 Arakicho, Shinjuku-ku, Tokyo Within Ken Concrete Industry Co., Ltd. (72) Inventor Toshiyuki Yanaka 13-4 Arakicho, Shinjuku-ku, Tokyo Inside Sumitomo Concrete Industry Co., Ltd. (72) Motoyuki Koga 1-10-6 Takaban, Meguro-ku, Tokyo No. Hako Co., Ltd. (56) References JP-A-8-165670 (JP, A) JP-A-56-85032 (JP, A) JP-A-7-229311 (JP, A) Utility model registration 2516441 (JP, A) Y2) (58) Fields surveyed (Int. Cl. ⁶ , DB name) F16L 1/024-1/038 H02G 1/06 311

Claims (2)

(57) [Claims] 1. A concrete precast C / C / BOX perforated conduit used for the construction of an underground buried electric wire joint trench, excavating to a predetermined width, leveling, and compacting a foundation crushed stone. laying precast steel foundation plate above onto the base mat, a porous tube block group composed as assembled integrally with previously few blocks only hanging jig porous tube blocks necessary number sequence, installation requires the number of threads in lifting heavy equipment And
A method of constructing a C / C / BOX perforated conduit, wherein after several blocks have been constructed, a PC steel material is inserted at once and tightened, and then the hanging jig dedicated to the several blocks is removed and backfilled. 2. A concrete precast C / C / BOX perforated conduit used for the construction of an underground buried electric wire joint trench, digging of a predetermined width, leveling, and compaction of a foundation crushed stone. laying precast steel foundation plate above onto the base mat, previously the perforated pipe blocks necessary number sequence P
End plates are arranged at both ends of the group of perforated pipe blocks that are inserted and tightened by the C steel material, and several blocks of dedicated hanging jigs are integrally attached to the perforated pipe block group, which are lifted and installed by a heavy machine, C. C. B. Next, the hanging jig dedicated to the several blocks is removed and a predetermined back filling is performed.
A method for constructing a porous conduit for OX.