JPS6015782Y2 - Connection structure in culvert drainage block - Google Patents

Description

[Detailed explanation of the invention] This invention relates to the connection structure in the underdrain drainage block.
To make it extremely easy to connect blocks at the connection part of underdrain drainage, and to obtain something that has reliable connection and is easy to adopt in underdrain drainage construction.

In general, moisture in the soil is essential for crop growth, but in low-swamp fields with high groundwater levels or fields with heavy, dense soil and poor permeability, excessive soil moisture due to heavy or long rains can cause crops to grow. Many problems arise, including poor growth, poor germination, and the occurrence of diseases.

For this reason, it is necessary to construct underdrainage to ensure proper soil drainage.

Traditionally, culverts were constructed by burying knotted bamboo tubes, cypress, etc. in trenches dug in the ground to improve soil drainage, but bamboo tubes and cypress are simply inconvenient to handle. However, it has the disadvantage that it is susceptible to corrosion due to the action of bacteria in the soil.

For this reason, metal pipes, clay pipes, etc. are buried in place of bamboo tubes and bamboo pipes, or structures are constructed with stones, bricks, concrete, etc., but these are expensive and the inflow of water is limited from the ends of the pipes. Therefore, it was unsuitable for use as an underdrain to improve drainage of large areas of soil such as agricultural land.

Therefore, in recent years, underdrain drainage blocks made of hard synthetic resin foam have been used with good results as they are easy to construct, practical, lightweight, and have excellent corrosion resistance and elasticity. In particular, this invention attempts to provide a connection structure that allows the connection of the above-mentioned jacks to be made simply, quickly, and reliably at the connection part of the underdrain drainage.

That is, its structure is a joint between two underdrain drainage blocks made of a synthetic resin hard foam having drainage grooves in the longitudinal direction, and is wound so as to span the outside of both underdrain drainage blocks at this joint. The connection cover made of a narrow strip-shaped sheet is provided with an adhesive part at one end, the joint part is attached to the underdrain drainage block, and the other end is overlapped with the above-mentioned one end part and joined with appropriate fixing means. This is a characteristic feature.

Next, embodiments of this invention will be illustrated below with reference to the drawings.

Reference numeral 10 denotes a connection cover, which is made of a belt-shaped sheet that can be wrapped around the underdrain drainage blocks 1, 1' made of a hard foam such as expanded polystyrene, and is particularly suitable for underdrains having drainage grooves 2, 2 in the longitudinal direction. It is preferable to use a transparent sheet made of synthetic resin, which is long enough to be locally wound so as to span the outside of the joint between the drainage blocks 1, 1, and which allows the connection of the underdrain drainage blocks to be seen through.

11.11' is the connection cover 10 made of a band-shaped sheet.
At both ends, it is possible to overlap the tiles when winding.

12 is an adhesive part provided at one end 11 of both ends 11 and 11', and is for directly adhering to the underdrain drainage blocks 1 and 1', and the adhesive is applied directly to the connection cover 10. In addition to the double-sided adhesive tape, it is preferable to attach a double-sided adhesive tape and have a peelable piece 13 on the adhesive surface.

Furthermore, the other end 11' is overlapped with the one end 11 and joined by a fixing means as described later.

That is, as a specific example of the fixing means, in the case of FIGS. 1 to 3, an adhesive part 12' is also provided on the other end 11' of the connection cover 10 on the side facing the one end 11, After winding, the ends 11, 11' can be joined together.

In this case, the adhesive portion 12' is preferably a double-sided adhesive tape having a peelable piece 13', similar to the adhesive portion 12 described above.

Further, as shown in FIG. 4, both adhesive parts 12 and 12' are provided on the front and back sides of one end 11 of the connection cover 10, and as shown in FIGS.
An implementation substantially similar to the embodiment of FIG. 8 may also be implemented.

In either case, the adhesive part such as double-sided adhesive tape does not have to be in the form of a single piece that spans both of the underdrain drainage blocks 1.1' to be connected, but can be divided into a plurality of pieces.

Next, 20 in FIG. 5 indicates both ends 11 and 11 of the connection cover 10.
' shows a separate stop member of the means for fixing the
It is used so that it can be penetrated from the outside of both ends 11, 11' of the overlapped covers and pierced into the underdrain drainage block 1゜1', and the underdrain drainage block 1, 1' to be connected.
It has a sharp tip 21 so that it can be easily pierced, and in particular, it has a protrusion 22 that is difficult to remove once it is pierced, a zigzag-shaped uneven part 23, etc. The ones illustrated in FIGS. 6 to 8, which have shapes similar to those shown in FIGS. 6 to 8, are suitable.

Of these, two of the blocks shown in Figs. 6 and 7 are used, while the block shown in Fig. 8 straddles both of the underdrain drainage blocks 1, 1' and is used by piercing as shown in Fig. 9.

In addition, underdrain drainage blocks 1, 1' made of hard foam
As long as the shape is possible, various implementations are possible.

Furthermore, the fixing means in the case of FIG.
．． 30' (commonly known as a magic fastener), one engagement tool 30' is provided on the opposite surface side of one end 11 of the connection cover 10, and the other engagement tool 30 is provided on the other end 11'.
The entangling needle 31 and the entangling tape 31' are provided on the opposite sides of the tape 31' so that they can be held together, and the two end portions 11 and 11' can be overlapped and joined.

Note that the adhesive portion 12 or the engagement tools 30, 30' are attached to both ends 11.
, 11', it is also possible to use the stopper member 20 in combination for the purpose of further strengthening the joint.

(not shown).

A preferable example of the underdrain drainage blocks 1, 1' connected and used in the connection cover 10 is shown in FIGS. 11 to 14.
As shown in the figure, drain grooves 2, 2 are formed in the longitudinal direction on both sides bordering on the central vertical wall 5, and left and right fitting portions 7av7b are formed at both ends. In 7a and 7b, the concave part a and the convex part A are formed to be opposite to each other, and the left and right fitting parts at one end are, for example, the respective fitting parts 7a and 7b on the front side, and the left and right fitting parts at the other end corresponding to the rear side. The fitting parts 7a and 7b are also formed so that the concave part and the convex part are opposite to each other, so that the underdrain drainage blocks can be joined to each other at the ends, and also between the plurality of rows of drain grooves 2. Boundary part 3, 3
Communication grooves 4, 4 are formed in the blocks, which are conveniently cut and used, and the blocks can be easily and reliably joined without being successively connected.

In order to connect the underdrain drainage blocks 1, 1 with the connection cover 10 according to this invention described above, the fitting parts 7a, 7 at the ends are
The connection cover 10 is joined to the connection point of the underdrain drainage blocks 1 and 1' which are connected to each other by the adhesive part 12 at one end 11 of the connection cover 10, and the other end 11' is pulled around and wound.
The winding state can be set by overlapping the other end 11' with the one end 11 and fixing the joint using a fixing means. In particular, the underdrain drainage blocks 1, 1' can be set by the initial adhesive part 12 before winding. There is no slippage during winding and it is easy to wind when connected to the connecting cover 10 after the both ends 11 and 11' are fixed.
The wound state can be maintained stably and reliably in a state where the underdrain drainage blocks 1, 1' are prevented from moving laterally and slipping from the connection points or rotating in the wound state.

The underdrain drainage blocks 1, 1' connected by the connection cover 10 as described above are used at the construction site with a filter 70 made of plastic net etc. wrapped around the entire body, and an example of normal construction will be given below. 25-30 cm wide and 80-1 cm deep in farmland with too much moisture (former rice paddies, etc.)
Dig a groove 80 and install an underdrain drainage block 1 at the bottom.
, 1' are lined up, and 5 to 10C7 are arranged around the block.
A hydrophobic material 90 made of foamed resin or the like is filled to a thickness of 71 mm.

After this, by backfilling the field ±100 mm to about 50 to 7 pupil of the upper part of the groove 80, culvert drainage is completed (see Fig. 15).

As described above, the connection structure according to this invention is simple because it involves joining one end directly to the underdrain drainage block, winding the connection cover, and overlapping both ends of the connection cover to secure the connection. This work will ensure that the connection of the underdrain block is maintained.

In particular, the connection structure devised by this invention is a local one by winding a narrow strip sheet that spans both joints of the underdrain drainage blocks, so it is possible to shield the longitudinal drainage grooves in the underdrain drainage blocks. In addition, even if a piercing-type stopper is used as a means of fixing the connection cover, piercing the underdrain drainage block with hard foam is difficult to remove and is stable. There are also advantages such as:

Therefore, by adopting the connection structure of this invention, it is possible to quickly and reliably connect the underdrain drainage blocks to each other during underdrain drainage construction, and the reinforcing effect at the connected part is also increased, which has an excellent practical effect in the valley part. I can demonstrate it.

[Brief explanation of the drawing]

The figures illustrate an embodiment of this invention, and FIG. 1 is a perspective view of the connection cover, FIG. 2 is a perspective view showing the connection cover when it is wound, FIG. 3 is a sectional view of the connection part, 4 is a cross-sectional view of a modified example, FIG. 5 is a cross-sectional view showing an embodiment using the stop member, FIGS. 6 to 8 are perspective views of the stop member, and FIG. 9 is a cross-sectional view of the stop member shown in FIG. FIG. 10 is a cross-sectional view of the connection part when used, FIG. 10 is a cross-sectional view showing an embodiment using an engagement tool, and FIG.
The figure is a perspective view illustrating the connected underdrain drainage blocks, and Figures 12 to 14 are the previous nn line, ■-■ line, and IV
15 is a cross-sectional view taken along line -IV, and is a cross-sectional view at the time of underdrain drainage construction. 10...Connection cover 11.11'...
・Both ends of the connection cover, 12, 12'...adhesive part, 20...stopping member, 21...sharp tip, 22...protrusion, 23... Zigzag uneven portion, 30, 30'... Engagement tool, 31
......Tangled needle, 31'...Tangled tape,
1,1'......Underdrain drainage block.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A joint between two underdrain drainage blocks made of synthetic resin rigid foam having drainage grooves in the longitudinal direction, such that the joint extends over the outside of both underdrain drainage blocks. The connection cover made of a rolled narrow strip sheet has an adhesive part at one end and is connected to the underdrain drainage block.
Furthermore, the connection structure for an underdrain drainage block is characterized in that the other end is overlapped with the one end and joined by an appropriate fixing means. 2. The connection in the underdrain drainage block according to claim 1 of the above-mentioned utility model registration claim, wherein the means for overlapping and fixing the other end of the connection cover on one end is an adhesive part provided on one of the opposing surfaces of both ends. structure. 3. The above-mentioned request for registration of a utility model in which the means for overlapping and fixing the other end of the connecting cover over one end consists of a stopper that can penetrate from the outside of both ends of the overlapping cover and pierce into the underdrain drainage block. The connection structure in the underdrain drainage block according to item 1. 4. Claim 1 of the above-mentioned utility model registration claim in which the means for superimposing and fixing the other end of the connection cover on one end is a retainer made of a combination of an entanglement needle on one side and an entanglement tape on the other side. Connection structure in the described underdrain drainage block. 5. The connection structure in the underdrain drainage block according to claim 1 of the above-mentioned utility model registration claim, wherein the band-shaped sheet cover is made of a transparent sheet of synthetic resin. 6. The connection structure in the underdrain drainage block according to claim 1 or 2 of the above-mentioned utility model registration claim, which uses double-sided adhesive tape as the adhesive part. 7. The connection structure in the underdrain drainage block according to claim 3 of the above-mentioned utility model registration, in which the pierceable stopper member has a sharp tip. 8. The connection structure in the culvert drainage block as set forth in claim 3 of the above-mentioned utility model registration, wherein the pierceable stopper member has a barbed peg-like shape that is difficult to remove once it is pierced.