JPS60175628A - Burying method for pipe - Google Patents

Abstract

PURPOSE:To prevent exposure of soil and sinking of buried earth due to pulling- off of a sheet pile, by a method wherein a ground between driven sheet piles is excavated, an earth scraping-off tool adapted to the inner surface of the sheet pile is fitted in the inner surface of the sheet pile, and an excavated groove is back-filled. CONSTITUTION:Sheet piles 2 are driven on both sides of a position where a pipe 5 is intended to be buried, earth between the sheet piles 2 is excavated to form an excavated groove, and before or after the piston 5 is installed, scraping-off members 7 are attached to the lower ends of the two sheet piles 2. The scraping-off members 7 is provided at one side edge 8 of a beltform plate body with a projection 9, conforming to the shape of the inner surface of the sheet pile 2, and the excavated groove is back-filled with earth 11. When the sheet pile 2 is pull off, earth adhered to a recessed part 10 in the inner surface of the sheet pile 2 is scraped off. This reduces earth, adhered to the recessed part in the sheet pile and pulled off togetherwith the sheet pile, and permits decrease of sinking of a line.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a method for burying a pipe.

(Prior art) Generally, when excavating a trench in the ground to bury a pipe in maintenance construction work, in order to prevent the earth and sand from collapsing, sheet piles are inserted between the pre-set planned pipe site and driven on both sides. A burial trench is formed by excavating between the sheet piles, a pipe is installed in this trench, and the burial work is completed by backfilling with earth and sand. by the way.

The sheet piles used for this burial work are those in which a band-shaped plate body is formed with an end face fλ shape and a recessed portion is formed along the longitudinal direction from the viewpoint of strength, workability, etc.

However, when the sheet piles formed in this way are driven into both sides of the pipeline, backfilled with earth and sand, and then pulled out, the soil is still attached to the recesses of the sheet piles, and as a result, a gap is created where the sheet piles are pulled out. Sediment from the bottom of the pipe and around the pipe flows into this gap.

There is a risk of subsidence of the pipe or abnormal flattening of the pipe.

(Objective of the Invention) The object of the present invention is to reduce the gap left after the sheet pile has been pulled out, thereby eliminating the possibility of subsidence of the pipe or abnormal flattening of the pipe.

(Structure of the Invention) This invention involves driving sheet piles on both sides of the position where the pipe is to be buried, excavating the soil between the sheet piles to form an excavated groove, and installing the pipe in the excavated groove and backfilling. Afterwards, in the burying of the pipe from which the sheet pile is pulled out, a scraping tool is formed whose side edge fits the inner surface of the sheet pile, and when backfilling the excavated trench, the scraping tool is placed at the bottom of the excavated trench.

This is a method for embedding a pipe, which is characterized by embedding the pipe so that the side edge matches the inner surface of the sheet pile.

(Example) An example of the present invention will be explained based on the drawings according to the construction procedure. Figures 1 to 4 show a series of construction procedures, and Figure 1 shows the A state in which sheet pile 2 has been driven is shown. FIG. 2 shows a state in which the earth and sand between the sheet piles 2 are excavated to form a burial trench 3. At this time, the lower end 4 of the sheet pile 2 is still driven into the soil, and the sheet pile 2
is held so that it does not fall. FIG. 3 shows the pipe 5 installed in the buried trench 3, either before or after installing the pipe 5.

At the bottom in buried i41!3. A scraping member 7 is installed in the corner 6 under the rain. The scraping member 7 is as shown in FIG.
A convex portion 9 that matches the inner surface shape of the sheet pile 2 is formed on one side edge 8 of the band-shaped plate body, and as shown in FIG. 6, this convex portion 9
Align it with the recess 10 of the sheet pile 2.

The scraping member is installed with one side edge 8 on which the convex part 9 is formed inclined slightly toward the opposite direction. Figure 4 shows the pipe 5 and the scraping member 7.
It shows the state of backfilling with earth and sand 11 after installing the
After backfilling like this.

Pull out sheet pile 2. The state when pulling out the sheet pile 2 is shown in the seventh figure.
To explain with a diagram, a scraping member 7 is installed in contact with the sheet pile 2, and since the scraping member 7 is held down by backfilling earth and sand 11, when the sheet pile 2 is pulled upward, the inner surface of the sheet pile 2 is removed. The soil adhering to the recessed portion 10 is scraped off by the convex portion 9 of the scraping member 7, and there is no fear that it will be pulled out together with the sheet pile 2.

(Effects of the Invention) As explained above, this invention drives sheet piles on both sides of the position where the pipe is to be buried, excavates the soil between the sheet piles to form an excavated groove, and installs the pipe within the excavated groove. After backfilling, when burying the pipe to pull out the sheet pile, a scraping tool is formed whose side edge fits the inner surface of the sheet pile, and when backfilling an excavated trench, the scraping tool is placed at the bottom of the excavated trench along the side edge. This is a method of embedding pipes that fit into the inner surface of the sheet pile.

Less earth and sand adheres to the recesses of the sheet piles and is pulled out along with the sheet piles, and the voids left behind by the sheet piles become extremely small, eliminating the risk of subsidence of the pipes and abnormal flattening of the pipes.

[Brief explanation of drawings]

1 to 4 are cross-sectional views showing the procedure for burying a pipe, FIG. 5 is a perspective view of a scraping member, and FIG. 6 is a perspective view showing a state in which the scraping member and the sheet pile are in contact. FIG. 7 is a sectional view showing the installed state of the scraping member. 1... Pipeline planned site 2... Sheet pile 3... Buried trench 5... Pipe 7... Scraping member 9... Protrusion 10... Concave Applicant Representative of Sekisui Chemical Co., Ltd. Person: Fujinuma, profiteer Figure 1 Figure 2 Figure 31 Figure 4

Claims (1)

[Claims] 1) Driving sheet piles on both sides of the location where the pipe is to be buried. In the construction of burying a pipe by excavating the soil between the sheet piles to form an excavated groove, installing a pipe in the excavated groove and backfilling the excavated groove, and then pulling out the sheet pile, a scraper whose side edge conforms to the inner surface of the sheet pile is used. A method for burying a pipe, characterized in that when forming a scraping tool and backfilling an excavated trench, the scraping tool is embedded in the bottom of the excavated trench so that the side edge matches the inner surface of the sheet pile.