JPH05306513A - Connection of civil construction sheet - Google Patents

Abstract

PURPOSE:To raise the efficiency of construction work and secure the tensile strength of the connections by a method in which pipes with slits are successively inserted into the peripheral side of sheets for civil construction work, placed on soft ground. CONSTITUTION:A sheet 1 for civil construction work, which is formed by sewing a given size of the sheet whose perpheral side is folded into a cylindrical form with a rope inserted, is carried to construction site and placed on soft ground. The cylindrical parts of the adjacent sheets 1 are butted to each other and steel pipes 3 with slits are inserted successively into the corners of the sheets 1. Sand is placed on the sheets 1 to a given level to form a drain layer. The efficiency of operation can thus be raised and stable banking against the slide breakage and unequal subsidence of connections of the sheets can be constructed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for connecting civil engineering sheets, which is used when constructing an embankment on soft ground.

[0002]

2. Description of the Related Art At present, when constructing an embankment on a soft ground such as a swamp, a civil engineering sheet such as a woven fabric having water permeability and high tensile strength is laid on the soft ground and the embankment is constructed on it. There is a way. This is a method of preventing uneven settlement of the embankment and sliding failure by the tensile force of the civil engineering sheet.

[0003] In this method, a civil engineering sheet must be laid on the entire surface of the soft ground, and it is common to connect the civil engineering sheets in advance by a sewing process or the like in a factory, but still the same as the soft ground. It is impossible to sew a product having an area from the viewpoint of transportation, and it is necessary to connect civil engineering sheets at the construction site. The conventional method for connecting a civil engineering sheet at a construction site is 5 to 2 at the periphery of the civil engineering sheet.
It is common to attach eyelet metal fittings at intervals of about 0 cm and connect them one by one with a rope.

[0004]

However, this method is
It takes a lot of work because ropes are used to connect each eyelet metal fitting at a time on a soft ground where workability is poor. Furthermore, since the eyelet metal fittings are spaced apart, after laying and connecting the civil engineering sheet, when the earth and sand are sprinkled onto the civil engineering sheet, the tensile force generated in the civil engineering sheet due to the weight of the earth and sand and the construction heavy equipment, There was a problem that it concentrated on the eyelet metal fittings and was destroyed from the vicinity of the eyelet metal fittings. Therefore, it is an object of the present invention to obtain a method for connecting civil engineering work sheets that has good workability at a construction site and has sufficient tensile strength at a connection portion.

[0005]

[Means for Solving the Problems] First, a rope-inserting cylinder is provided at the peripheral edge of a civil engineering sheet that has been sewn in the factory, or a rope is attached by sewing, bonding, or the like. To do. This civil engineering sheet will be brought to the construction site and laid on soft ground. Next, prepare pipes with slits in succession, put adjacent civil engineering sheets together, and put the slitted pipes in the corners of the civil engineering sheet so that the ropes around each other are inside the pipes. Insert in sequence.

[0006]

[Advantage] According to this method, it is a simple work of inserting pipes with slits into the peripheral edge of the civil engineering sheet, so that the workability is good and the civil engineering sheets are continuously connected. As a result, sufficient tensile strength of the connecting portion can be obtained.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a connecting portion of the civil engineering sheet of this embodiment. A civil engineering sheet 1 having a tensile strength of 100 kg or more per width of 5 cm is sewn into a predetermined size at a factory, and the peripheral portion thereof is folded back into a tubular shape having a width of about 5 cm. Sew 4 with the polypropylene rope 2 having a diameter of about 6 mm inserted therein.

Next, the civil engineering sheet 1 is carried into a construction site and laid on soft ground having an N value of 4 or less. And
The outer diameter is 2 with the slit 5 of about 3 mm.
Prepare a steel pipe 3 with a wall thickness of about 2.3 mm and a thickness of about 2.3 mm, and install the adjacent civil engineering sheet 1
The steel pipes 3 are sequentially inserted from the corners of the civil engineering sheet 1 so that the ropes 2 attached to each other at their peripheral portions are inside the steel pipe 3.

When the steel pipes 3 having the slits 5 are inserted into all the places to be connected with the civil engineering sheet 1 and the connection is completed, sand is used as a drainage layer on the civil engineering sheet 1 with a thickness of 30 cm. Unwind and build a bank of a certain height on it.

In this embodiment, polyester fibers are used as the material for the civil engineering sheet, but the present invention is not limited to this, and other materials such as polyethylene fibers, polypropylene fibers, nylon fibers may be used. Further, the civil engineering sheet includes, in addition to ordinary woven fabric, a mesh-shaped woven or knitted fabric which is sewn with a resin.

Further, the material of the rope attached to the peripheral portion of the civil engineering sheet may be other material such as polyethylene, polyester and nylon, and the diameter of the rope is larger than the width of the slit of the pipe and is half the inner diameter of the pipe. Must be: As a method of attaching the rope, here, the peripheral edge of the civil engineering sheet was folded back into a tubular shape, and the rope was sewn with the rope inserted therein.
Alternatively, as shown in FIG. 4, the rope may be directly sewn, adhered or welded to the peripheral portion of the civil engineering sheet.

The pipe with slits may be made of plastic such as vinyl chloride pipe, polyethylene pipe, etc. in addition to steel pipe, and the diameter thereof is about 20 to 200 mm and the wall thickness is required to be 1 mm or more.
Considering workability on site, the length is preferably about 0.3 to 4 meters.

[0013]

EFFECT OF THE INVENTION According to the method for connecting civil engineering sheets of the present invention, a pipe having a slit is inserted as compared with the conventional method for connecting civil engineering sheets on a place with poor workability on soft ground. Since it is just done, the workability has become very good.

Further, since the civil engineering work sheets are continuously connected, the tensile strength of the connecting portion becomes close to the strength of the ground of the civil engineering work sheet, and when the earth and sand are spread on the civil engineering work sheet, The embankment was able to be constructed without breaking the connecting part.

In addition, since the pipe with slits used for connection has bending strength, the bending strength of the pipe is added to the tensile strength of the civil engineering sheet, and it is more stable against uneven settlement and slip failure. I was able to get the embankment.

[Brief description of drawings]

FIG. 1 is a perspective view of a civil engineering seat connection portion of the present embodiment.

FIG. 2 is a cross-sectional view of a civil engineering sheet connection portion of the present embodiment.

FIG. 3 is a cross-sectional view of a civil engineering seat connection portion of another embodiment.

FIG. 4 is a cross-sectional view of a civil engineering seat connection portion of another embodiment.

[Explanation of symbols]

 1 Civil engineering sheet 2 Rope 3 Pipe 4 Sewing 5 Slit 6 Adhesive

Claims (2)

[Claims] 1. A civil engineering sheet is provided with a tubular portion into which a rope is inserted, the tubular portions of adjacent civil engineering sheets are brought into contact with each other, and a pipe having continuous slits is provided in the tubular portion. A method for connecting civil engineering sheets, characterized in that the sheet is inserted so that it is inside the pipe. 2. A rope is attached to the peripheral portion of the civil engineering sheet, the ropes of adjacent civil engineering sheets are butted together, and a pipe with continuous slits is placed so that the rope is inside the pipe. A method for connecting civil engineering sheets characterized by being inserted.