JPS583911Y2 - Connecting box conduit block - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a connecting box conduit block.

BACKGROUND ART Conventionally, in constructing sewers and other passageways, a method of connecting concrete culvert blocks with both ends open has been widely used.

As is known in the art, this block has through-holes at the four corners through which tightening materials such as steel rods and PC strand wires are inserted, and recesses are formed on the inner surfaces of the four corners, and the tightening materials are inserted into these recesses. It is designed to be tightly connected and connected to each block.

However, when constructing a box conduit using the conventional connecting box conduit block having the above structure, when tightening the tightening material in the recessed part inside the concave conduit blocks, there is no outside light inside. The work had to be done in a dark place because the light could not be accessed, and it was not easy to tighten the above-mentioned tightening materials, so the work had to be carried out using separate lighting equipment.

In addition, since the tightening work of the above-mentioned tightening materials needs to be carried out at the four corners of the box conduit block, it is necessary to tighten the tightening materials at the four corners of the box conduit block.
The work had to be done in an upward position, which made it extremely difficult to perform, especially the work of filling mortar etc. after tightening the fastening material, resulting in extremely poor workability and a significant drop in work efficiency.

In view of this, the present invention has been developed to provide a connecting box that facilitates the work of tightening the fastening materials in the box conduit blocks that are laid continuously and the work of filling mortar etc. into the recesses, thereby improving work efficiency. It was created for the purpose of providing drainage blocks.

In order to achieve the above object, in the present invention, a concrete box conduit block that is open at both front and rear ends has through-holes for inserting the tightening material that open at the front and rear end surfaces at the four corners, and recesses for tightening the tightening material on the inner surfaces of the four corners. A box conduit block having a section, characterized in that the upper recessed part is provided with a through hole opening to the outside of the box conduit block, and the lower recessed part is provided with a continuous drainage hole. The through holes provide daylight to the interior of the continuous construction, and at the same time, they also function as a passage for filling grout, such as mortar, after tightening the binding material, and the drainage holes at the bottom allow the interior to be drained. This purpose was achieved by making it possible to drain accumulated water.

The present invention will be explained below with reference to embodiments shown in the drawings.

The basic structure of the box conduit block 1 is a hollow prismatic concrete block with both ends open, similar to known ones, and its four corners 2, 2, . . . are padded on the inner surface. The inner surfaces 2a of the diagonal corners are formed to be parallel,
The corner portions 2, 2, . . . are provided with through holes 3, 3, .

In addition, the inner surfaces 2a, 2 of the four corner portions 2, 2...
a... has concave portions 4, 4, 5 in the center in the front and back direction.
．． 5 is formed, and the through holes 3, 3, . Expose the end 6a of the tightening material 6, such as a steel rod or PC strand wire, to be inserted into the . This makes it possible to tighten the tightening members 6, 6 and bring the joint surfaces of each box conduit block 1 into close contact.

In the present invention, as shown in FIGS. 1 and 2,
The inner bottoms of the recesses 4, 4 located on the upper side are provided with through holes 9, 9 that open to the upper surface of the Suzaka 1a, and the inner bottoms of the recesses 5, 5 located on the lower side are provided with a bottom plate. A drainage hole 10.10 is drilled through the lower surface of 1b.

The through holes 9, 9 are preferably opened in the upper surface of the suzaka 1a, but may be opened in the side plates 1c, lc.

Next, a construction method for constructing a continuous box ditch using the box ditch block 1 will be explained.As an example is shown in FIG.
A number of ordinary box ditch blocks 1', 1', .・・・・・・
Insert the tightening material 6゜6 into the through-hole 3, 3... for the insertion of the tightening material.
. . . and expose their ends 5 a , 5 a in the recesses 4 , 4 , 5.5 of the box conduit block 1 , and insert washers 7 , 7 into these ends 6 a , 6 a Natsuto intervenes 8,8
By screwing them together and tightening them, the tightening members 6, 6 are tensioned, and the joint surfaces of each box conduit block 1, 1', . . . are crimped to form a watertight connection.

In this case, a packing made of an elastic material may be interposed between the joint surfaces, or adjacent box conduit blocks may be fitted with projections and recesses to ensure water tightness.

Further, the tightening means is not limited to the nuts 8, 8, but as shown in FIG.
Fit the grip 11.11 through the grip 11.
．． 11 may be used to fasten the tightening member 6.6.

Next, the recesses 4, 4, 5.5 are filled with grout such as mortar, and the through-holes 3.3 for each tightening material insertion are made from inside the box conduit block 1 to the recesses 5.5 located on the lower side. Insert the tip of the mortar injection pipe 12.
Insert the mortar injection pipes 12.12 through the through holes 9, 9 opened on the Suzaka 1a of injection.

In this case, a fitting groove 13.13 for holding the mortar injection pipe 12.12 is provided on the inner side of the through holes 9, 9.
If this is formed, the pipes 12 and 12 can be held stably.

When performing the above-mentioned operations, external light enters into the box conduit block 1 through the through holes 9, 9 opened in the Suzaka 1a.
Work can be carried out in a bright environment without the need for special lighting equipment.

After the injection of mortar into the through holes 3, 3 is completed,
Each concave portion 4, 4, 5.5 is filled with mortar to fill the end portions 5a, 5a of the tightening members 6, 6 and the nuts 8, 8 or grips 11, 11, etc. that tighten them. At this time, the lower concave portions 5, 5 can be easily filled in a bright environment due to the sunlight coming through the through holes 9.9, and the upper concave portions 4, 4 can be filled with mortar as shown in FIG. By applying the formwork 14 to the opening surfaces of the concave portions 4, 4 and filling the through holes 9, 9 with mortar as shown in FIG. It is possible to reliably fill mortar without having to carry out any process.

Note that since the lower concave portions 5, 5 are connected to the drainage holes 10, 10, water does not accumulate therein and impede filling with mortar.

As explained above, in the present invention, among the recesses formed on the inner surface of the four corners of the box conduit block, a through hole that opens to the outside of the box conduit block is formed in the recess located at the upper side, so that the conduit block is continuous. During various operations such as fastening fasteners in a box conduit block that has been laid or filling grout into the through-holes for inserting the fasteners, special lighting equipment is required as outside light is brought in through the through-holes. There is no need to separately introduce the system, and therefore the work can be easily performed.

Furthermore, when filling the recess with mortar, etc., it can be done from outside the box culvert block through the through hole, which eliminates the hassle of filling in an unnatural position inside the box culvert block. , work efficiency can be greatly improved.

[Brief explanation of drawings]

Fig. 1 is an external perspective view showing an embodiment of a box conduit block according to the present invention, Fig. 2 is a sectional view thereof, Fig. 3 is a side view showing an example of the connection configuration of the box conduit block, and Fig. 4 is the same. FIG. 5 is an enlarged cross-sectional view of the tightening part of the tightening material, FIG. 5 is a view corresponding to FIG. 4 showing the tightening means at the same place, and FIG. 6 is a partial cross-sectional view showing the state when the upper recess is filled with grout. . 1...Box ditch block, 2...Corner, 3
...Through hole for inserting tightening material, 4, 5... Recessed portion, 6...Tightening material, 7... Washer, 8
...Natsuto, 9...Through hole, 10...
...Drain hole, 11...Grip, 12...
...Mortar injection pipe.

Claims (1)

[Scope of utility model registration request] Through-holes for inserting the tightening material that penetrate in the front and rear direction are bored in the four corners of a concrete box conduit block that is open at both front and rear ends, and recesses for tightening the tightening material are formed on the inner surfaces of the four corners, and the recesses are filled with the A connection in which a through hole for the insertion of a tightening material is opened, a through hole that opens to the outside of the box conduit block is provided in communication with the recessed part on the upper side, and a drainage hole is provided in communication with the recessed part on the lower side. Utility box ditch block.