JP2000045675A - Service pipe laying method and device used in such method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a time for drilling and refilling a paved road during installation of a service pipe, shorten a time for occupying the road, and prevent the settlement of the paved road after refilling. SOLUTION: A paved road surface is cut by a circular cutter and withdrawn and a circular casing is sunk therein to form a circular pit. A sectionally crescent reaction plate 82 is installed in the pit to propel a curved pipe to a destination with a curve propelling machine, where a service pipe is installed. The casing is withdrawn and refilling soil is compacted while mixing solidifying material therein to recover pavement. In a refilling process, drilled soil is returned into the pit and the drilled soil and the solidifying material are mixed in the pit and rolled to prevent the settlement of a road surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a gas pipe, a water pipe,
The present invention relates to a construction in which branch pipes are laid from underground pipes under roads such as sewage pipes and electricity and telephones, and these underground pipes are drawn into a building along a road.

[0002]

2. Description of the Related Art Conventionally, in order to branch a service pipe or a service line from an underground pipe buried under a road, a pavement road surface is cut into a square with a rotary cutter and then exfoliated. The earth had to be excavated, excavated, laid and excavated to an underground burial, and the road had to be excavated transversely to the drop-in point for piping.

[0003] A construction method in which a polyethylene pipe is propelled by a curved propulsion machine without digging a road in a transverse direction, and the polyethylene pipe is propelled from a buried position of a buried pipe under a road to a target location (Patent No. 19).
89217: Japanese Patent Publication No. 7-13433). However, even with this method, the pits to be built for propulsion are square, and the pits are not cut and removed quickly during paving, which occupies the road for a long period of time and hinders road traffic. was there.

[0004]

In the conventional pit excavation method, cutting of the pavement road surface, excavation of earth and sand, and earth retaining are required, so that it takes two to three days to complete the construction. Restrictions on the period was relatively long, preventing smooth traffic.

Accordingly, an object of the present invention is to overcome this drawback, complete the cutting and digging of a pavement surface in a short time, and shorten the time required for opening road traffic. Furthermore, it is necessary to reduce the time required for pit construction by simultaneously performing earth retaining and excavation, complete excavation in a short time, shorten the occupation period of the road, and also ensure that the subsidence of the pavement will not occur even after backfilling. Target.

[0006]

Means for Solving the Problems The pavement road surface is cut in a circular shape and removed, a circular pit is constructed, and a pipe is protruded and buried from the pit in a curved shape by a curved propulsion machine, thereby cutting and removing the pavement road surface. To reduce the time required. When excavating and removing the earth and sand under the pavement slab, the excavator is equipped with rollers to perform excavation and casing installation at the same time.Furthermore, after the installation of the drop pipe or drop line is completed, the casing is removed and backfilling and pavement are performed. The road was restored in a short time. A protection ring for protecting the edge of the circular hole formed on the pavement surface is provided to protect the edge of the pavement plate so that the pavement surface is not adversely affected. In the backfilling process, the excavated soil was returned into the hole, and the excavated soil and the consolidated material were mixed in the hole and rolled to prevent road surface settlement after restoration.

[0007]

FIG. 1 is a conceptual diagram of the present invention.
The road surface of the paved road is cut into a circle, and a curved propulsion device is installed in a circular pit 100 provided by removing the road slab, and a curved pipe is pushed out by a jack while controlling the direction. The curved tube is
Hole 10 in a curved shape passing under gutter 102 and fence 103
Form 1 and make it appear on the ground where the drop pipe is installed. Since the curved hole 101 is formed, necessary pipes are drawn into the hole so that it can be connected to a water supply, a gas pipe, or a telephone line or a power line.

FIGS. 2 to 4 are a front view, a plan view, and a side view of an example of a curved propulsion device used in the present invention. The basic structure is conventionally known. The construction procedure will be described by taking as an example a case where a service pipe is installed in a house as a branch pipe of a water pipe.

[0009] As shown in FIG.
To cut the pavement road surface 1 (A). Drill a hole in the center of the pavement slab 11 cut by the circular cutter 2, insert a lifting tool having a diameter-enlarging member at the tip into the pavement slab 11, expand the diameter-enlarging member and bite into the pavement slab, Lift up with a crane and remove (B).

In the hole formed by removing the pavement road slab 11, a protection ring 3 provided with a flange 32 at the upper edge of the ring 31 shown in FIG. 6 is installed, and the edge of the pavement road surface 1 is cut off during work. (C).

Then, initial excavation is performed by the screw auger 4. In the initial excavation, excavate and excavate the roadbed and subgrade,
This is performed to a depth where the casing 5 can be installed (D).

The casing 5 comprises a lower casing 51 and an upper casing 52 as shown in FIG. 7, and is connected by a projection 61 and a joint plate 62 having a joint hole as shown in FIG.
The required length can be obtained. A flange 53 is provided on the upper edge of the upper casing 52 together with a reinforcing rib, and a roller is provided on the flange surface. Screw auger 4
In this case, the inside of the casing is excavated while the pressure ring 42 presses the casing via the roller, and the casing 5 is sunk.

When it reaches a certain depth, the lower casing 5
1 and the upper casing 52 is connected, excavation is continued, and the casing 5 is further laid (E). When excavating to the vicinity of the buried water pipe, stop the machine digging and excavate while checking the water pipe manually.

After the sinking of the casing is completed, a reaction force plate 82 having a crescent cross section and a curve propulsion device 81 are installed in the casing (F). The curved propulsion device includes a known propulsion head, a bendable bending pipe, and a propulsion jack. The position and direction of the propulsion head are monitored. It is possible to advance the propulsion head in a curved shape by controlling the propulsion head, and to direct the propulsion head to the ground at a target location.

A propulsion head is pushed out from a lower side of the casing 5 or an opening provided in the casing 5 together with a curved pipe with a jack, and the direction of the propulsion head is controlled to propell the vehicle to a target position. The propulsion is completed when the propulsion head reaches the target position and appears on the ground. The propulsion head is removed from the bend pipe, and the buried pipe is connected to the bend pipe.
The bent pipe is pulled back to the 0 side, and the pipe is set in the curved hole 101.

Various pipes are prepared in accordance with the pipes to be buried. In the case of a single pipe such as a water pipe, the cross section is circular. However, as shown in FIG. Use a cross section that is divided into multiple sections.

At the completion of the service pipe work, the curvilinear propulsion device 81 is lifted from the pit 100, and the excavated earth and sand is buried in the casing 5. After backfilling by about half, a cement-based consolidation material is put into the hole, and stirred and mixed with the backfilled soil by the stirring tool 7 (G). The stirrer 7 has a plurality of arms attached radially downward from the central axis, and a stirring blade is provided at the tip of the arm. When the backfill soil and the consolidation material are sufficiently mixed, the backfill soil is compacted. Backfill and compaction are 3 when the excavation depth is about 1.2m.
Divide about once.

The casing 5 is pulled up and removed, the protective ring 3 is removed, and the remaining backfill is performed. After the roadbed is formed, paving is performed with quick-setting concrete and traffic is released after curing.

[0019]

According to the present invention, the pavement is cut and removed with a circular cutter,
By constructing a circular pit, work can be performed efficiently, the construction period is shortened, and traffic is less affected. By using a composite pipe having a plurality of cross-sections, the necessary construction can be completed at once without repeating excavation for each construction.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of curve propulsion.

FIG. 2 is a front view of the curved propulsion device.

FIG. 3 is a plan view of the curved propulsion device.

FIG. 4 is a side view of the curved propulsion device.

FIG. 5 is a process chart of a circular pit construction.

FIG. 6 is a perspective view of a protection ring.

FIG. 7 is an explanatory view of a casing.

FIG. 8 is a perspective view of a joint portion of a casing.

FIG. 9 is a sectional view of a pipe having a partition.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pavement road surface 11 ... Pavement road slab 2 ... Circular cutter 4 ... Screw auger 5 ... Casing 7 ... Stirrer 81 ... Curve propulsion machine 82 ... Reaction plate

Claims (9)

[Claims] A pavement road is cut and removed in a circular shape, a circular pit is constructed, and a buried pipe is provided from the pit with a curved buried hole by a curved propulsion machine. 2. A method according to claim 1, wherein a circular casing is sunk to form a circular pit. 3. The method according to claim 2, wherein the casing is installed after the ground is initially excavated. 4. A method according to claim 2, wherein the casing is excavated while applying pressure to the casing by an excavator via a roller. 5. A method according to any one of claims 2 to 4, wherein a protection ring is provided in a circular hole on a pavement road surface to protect an edge of the pavement plate. 6. A drop-in pipe laying method according to claim 2, wherein a plurality of casings are connected. 7. The drop-in pipe laying method according to claim 1, wherein the drop-in pipe to be provided has a cross section divided into a plurality of sections. 8. A method according to claim 1, wherein the excavated soil is returned into the pit, and the excavated soil and the consolidated material are mixed in the pit. 9. A crescent-shaped propulsion reaction plate having a cross section.