JPS6062396A - Drilling and sheeting apparatus in embedding accelerating pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Application The present invention is used for construction of underground sewer pipes, other underground piping, etc., and for pipe propulsion work using the shield method.

Technical Background of the Invention Buried pipe propulsion work involves inserting a unit length of pipe horizontally through a manhole-like vertical hole, pushing the rear end of the pipe forward with a jack, and adding pipes one after another.

Conventional technology By the way, conventional equipment for carrying out such pipe propulsion work is
It is common that a blade is fitted at the tip of the pipe, and a gate is also provided to stop the flow of earth and sand into the pipe in the event of collapse of the earth and sand during excavation of the pipe. Once the inflow of sediment is stopped, the collapsed sediment is solidified by chemical injection,
After confirming that the other mountain was independent, the gate was opened and tube propulsion was resumed. Therefore, when the soil condition is poor, the above work must be repeated many times, resulting in a loss of work time.
The liquid costs were high, making construction costs and schedules unreasonable.

Purpose of the Invention The present invention addresses these conventional drawbacks, and its purpose is to eliminate unstable excavation by using a gate that is capable of excavating and propelling the earth while excavating. If the earth and sand collapses during excavation, the earth and sand can be consolidated by closing the gate and advancing the cutting edge against the -W direction. Another purpose is to provide a device that can excavate while adjusting the tightness of the gate depending on the condition of the ground.

Another purpose is to easily and inexpensively provide loading dt, which allows the gate to be closed quickly without removing dirt or other debris that may become an obstacle when closing the gate in the event of a landslide. It is in.

Accordingly, in the second aspect of the present invention, the cutting tip body is separably fitted to the tip of the tube, and a cutting tip pushing jack is interposed between the two to push the cutting tip body against the tube. The cutter main body is provided with a gate that opens and closes the inside of the cutter and is capable of excavating earth and sand, and a jack for opening and closing the gate is attached to a support frame fixed to the cutter main body.

The removable blade body 2 fitted into the tip of the embodiment tube 1 is as follows:
It has a cutting edge 4'B2b having a triangularly pointed cutting edge 2a, a fitting front part 2o and a cutting edge holder 2d that fit on the outer periphery of the tip of the tube l so as to be slidable in the axial direction. Become. The blade propelling jack 3 is interposed between the pedestal 2d and the tube tip 1a.

Several jacks 3 are installed at equal intervals all around the circumference or at required intervals of 1 inch.

The gate 4 uses a cutting edge type clamshell that opens and closes in a circular arc movement from side to side with a pivot shaft 5 as a fulcrum. This gate 4 is V! as shown in FIG. It is provided in the inside of the blade mouth 2e at the tip of the body, and when opened from side to side, the inside of the blade mouth 2C becomes rJfJ, and when it is closed, the arc-shaped bulge V is fully closed.

6 is the gate IJII that opens and closes the left and right gates at the same time.
It is a closing jack and is provided separately for left and right 11W. The support frame 7 of this jack 6 is formed into a U-shape and is fixed to the holder 2d of the blade body 2 in the same body.

In the illustrated example, a square body a is used as the eight bodies 1 to be buried and promoted, but the present invention can also be applied to a circular tube.1. In addition, as shown in the fa1-2 diagrams, the left and right gates 4 are
It can also be provided in stages.

In the figure, reference numeral 8 denotes a brass member that supports the blade tip propulsion jack 3.

When the working ground is stable, the gate 4 is opened and the tube body 1 is pushed away from the rear end and propelled through the gate.

If the earth and sand collapses during excavation or if the ground is unstable, the gate 4 is temporarily closed, and then the cutting edge propulsion jack 3 is operated to push the cutting edge body 2 forward. Then, the cutting mouth main body 2 moves away from the tube body IK, thereby consolidating the earth and sand in front of the gate.

When the soft earth and sand are consolidated, the ground becomes stable, so next open the gate 4 and push the pipe body 1 and the cutting head body 2 forward to excavate while adjusting the degree of gate engagement depending on the state of the ground. go.

Effects of the Invention This invention has the configuration described above, and since the cutting head body fitted at the tip of the tube body can be propelled by the cutting edge propelling jack, the gate can be closed and the cutting edge can be moved forward. If pushed to the top, unstable ground or collapsed soil can be pressed and compacted by injecting chemicals as in the past, and manual excavation can be omitted, significantly increasing work efficiency. The difficult excavation propulsion work can be easily, quickly and reliably carried out. In addition to the function of retaining earth and sand, gates cut into the earth and perform excavation functions, so when closing the gate to retain earth in the event of a landslide, it is necessary to remove items such as earth and sand that may become an obstacle when closing the gate. This has excellent practical effects, such as the gate can be quickly closed without requiring any additional work, the loss of manpower and work time can be greatly reduced, and there is no worry of unreasonable construction costs and processes.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show one embodiment of the present invention, and FIG. 1 is a front view as seen from the blade mouth side, FIG. 2 is a vertical side view, and FIG. 3 is a cross-sectional plan view. . 1...Pipe body 2...Blade main body 3...Blade propelling jack 4...Gate 6...Gate opening/closing jack 7...Support warehouse applicant Sato Kogyo Co., Ltd.

Claims (1)

[Claims] A cutting head main body is separably fitted to the tip of the tube body, and a cutting edge propelling jack for pushing the cutting edge body against the tube body is interposed between the two. An excavation and earth retention device for a buried propulsion pipe, characterized in that a gate is provided which can be opened and closed and earth and sand can be excavated, and a jack for opening and closing the gate is attached to a support frame fixed to the side of the cutting mouth body.