JPH0351875B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a bottom-expanding drilling device used in a construction method in which a hollow pipe such as a hump pipe or a long well pipe is buried underground and a vertical shaft is excavated. be.

(Purpose of the invention) To form a vertical shaft such as a well or an underground entry pile by stacking, connecting and integrating hollow pipes such as hump pipes and long well pipes buried underground. However, the object of the present invention is to provide an excavation device that can perform construction from the uppermost pipe to the tip underground pipe in a short time without tilting while burying a humid pipe or the like.

(Prior art) As an example of a generally widely known and used method for burying hollow pipes such as humid pipes, sheet piles are placed on the outside of the hollow pipes to be buried in a state larger than the outside diameter. etc. are driven deep into the ground, and the slime such as earth, gravel, etc. inside the sheet pile is scraped up and carried to the surface, leveling the inside of the shaft.
Hollow tubes were stacked one on top of the other to form wells and other shafts, but the construction was extremely large-scale.

In addition, we have improved the above-mentioned construction method and created a new construction method, in which the applicant of the present application applied for an earlier application, in which a Huyum pipe is placed on the ground surface at a preset excavation position, and the soil, gravel, etc. inside and at the bottom of the pipe are excavated. In order to bury the first hume pipe, a heavy object is placed on top of the pipe and heavy pressure is applied to bury it, and then the next hume pipe is joined on top of it and connected one after another. The above operations were repeated many times to form the originally intended vertical shaft.

(Problems to be Solved) The present invention solves the problem that in the above-mentioned conventional technology, when excavating and burying humid pipes etc. in multiple layers, although the work is carried out based on careful calculations, Unforeseen circumstances such as unexpected changes in the strata occur, and as a result, the Huyum Canal tilts, and the slope must be corrected. Therefore, heavy objects are placed at the top of the Huyum Canal, which is sloping and high. The structure was placed on a large machine and its weight was used to correct the inclination, which was a dangerous and troublesome task, requiring a large machine, resulting in a drastic drop in work efficiency and the construction work taking a long time.

In addition, in this type of shaft excavation method, it is necessary to carry out slime such as earth, sand, gravel, etc. after excavation to a certain extent. This method is carried out by inserting the drilling equipment into the shaft again and repeating the excavation, and the drilling equipment is inserted and removed many times, and when it is inserted and removed, the tip of the drilling blade damages the inner wall of the Huyume pipe. The problem was that it got stuck in the uneven parts and could not be inserted and pulled out smoothly.

In addition, there were problems such as changes in the geological formations, the appearance of large-diameter boulders, etc., which could cause the direction of excavation to deviate from the excavation position of the shaft or cause it to meander.

(Means for solving the problem) In view of the above-mentioned problem, a cylindrical guide part is formed along the inner diameter of the Huum tube to be buried in the second rotating shaft extending from the tip of the rotating shaft of the earth drill machine, and A plurality of locking plates are fixedly attached to each plate, and a widening blade is pivotally attached to each of the locking plates, and a Japanese drum-shaped slide ring is provided at the outer end of a digging blade formed on the widening blade.

(Structure of the Invention) The structure of the present invention is to excavate the inside of a hollow pipe such as a hume pipe to a predetermined depth using an earth drill machine, and expand the outer area of the hume pipe to gradually sink the pipe. This is a device for excavating earth drills, in which a detachable second rotor 2 is extended to the tip of the rotary shaft 1 of an earth drill machine, and a diameter slightly smaller than the inner diameter of the hump pipe A is installed at the upper part of the second rotary shaft 2. A cylindrical guide portion 3 having an outer diameter that can be slid up and down inside the tube is provided, and both upper and lower ends of the guide portion 3 form tapered portions 4 that are inclined inward, and the second rotation One side of a plurality of locking plates 5 is fixed to the periphery of the lower end of the shaft 2 and arranged radially and at equal intervals, and the base ends of the enlarged bottom wings 6 are placed at appropriate positions on each of the locking plates 5. 7 is rotatably pivoted, a digging blade 8 is formed at the other end of the expanded bottom blade 6, and a Japanese drum-shaped door wheel-shaped slide ring 9 is provided at the outer end of the digging blade 8. A hanging fitting 1 is attached to the second rotating shaft 2 on the upper part of the plate 5.
0 is provided, and the suspension fitting 10 and the expanded bottom wing 6 are connected by a coil spring 11.

(Example) Next, the present invention will be described based on drawings of examples.

FIG. 1 is a schematic vertical cross-sectional view showing the bottom-expanding excavation device of the present invention inserted into the pipe of a Huum pipe, and FIG. 2 is a schematic vertical cross-sectional view in the excavating state.

FIG. 3 is a sectional view of a slide ring provided at the outer end of the excavator blade.

FIG. 4 is a developed view of the slide ring with respect to the Hume tube and the tip tube.

The bottom-expanding excavation device for the method of burying hume pipes etc. one after another according to the present invention has a second rotary shaft 2 which is detachably attached to the tip of the rotary shaft 1 of an earth drill machine (not shown), 2. A cylindrical guide part 3 is provided above the rotating shaft 2, and has an outer diameter that is slightly smaller than the inner diameter of the hume pipe A and can be slid up and down inside the pipe. The tapered portions 4 inclined in the direction are formed respectively, and the second
One side of a plurality of locking plates 5 is fixed to the periphery of the lower end of the rotating shaft 2 and arranged radially, and the base end portion 7 of the expansion wing 6 is rotated to an appropriate position on each of the locking plates 5. A digging blade 8 is formed at the other end of the expanded bottom wing 6, and a Japanese drum-shaped door wheel is attached to the outer end of the digging blade 8 and rotates up and down on the inner circumferential wall surface of the humid tube. A slide ring 9 is provided, a hanging metal fitting 10 is provided on the second rotating shaft 2 at the upper part of the locking plate 5, and the hanging metal fitting 10 and the enlarged bottom wing 6 are connected by a coil spring 11.

The guide portion 3 and the second rotating shaft 2 of the device of the present invention are configured such that a plurality of columns are provided protruding from the second rotating shaft 2 and are fixed to the inner circumference of the cylindrical guide portion 3 by welding or the like, or The guide portion 3 and the second rotating shaft 2 are rotatable and fixed in the vertical direction with stoppers, etc., and the tapered portions 4 formed at both the upper and lower ends are designed to facilitate vertical sliding within the hume pipe. The outer diameter of the guide part 3 is made slightly smaller than the inner diameter of the hume pipe A, so that it can be accurately positioned in the excavation direction of the shaft while sliding on the inner wall of the integrated hume pipe A. It controls the

One end of a plurality of locking plates 5 is fixed to the lower end of the second rotating shaft 2 and arranged radially and at equal intervals, and a wing-shaped wide-bottom wing 6 is provided approximately at the center of the upper side of each locking plate 5.
A hole for a pivot is bored for pivotally mounting the wing, a hole similar to the pivot hole is drilled in the base end 7 of the enlarged bottom wing 6, and a pin 12 is inserted through the hole for pivoting. A digging blade 8 for excavating earth and sand, etc. is formed at the other end of the bottom expansion blade 6, and the outer peripheral end of the digging blade 8 is provided with the inner wall of the humid pipe A and the uneven portion of the connecting portion of the device. A door wheel-shaped slide ring 9 is provided at the end of the excavator blade in order to smoothly rotate it when inserting and removing the cutting blade, and then a crossbar-shaped hanging metal fitting 1 is attached to the second rotating shaft 2 at the upper part of the locking plate 5.
A coil spring 11 having appropriate elasticity and tension is attached to the other end of the coil spring 11. The elasticity of the coil spring 11 is used to control the opening/closing angle of the expanded bottom wing 6 rotatably attached to the locking plate 5.

Next, the opening angle restraining pin 13 is removably inserted into the outer upper part of the locking plate 5 fixed radially to the second rotating shaft 2 to restrict the opening angle of the enlarged bottom wings 7, and the restraining pin 13 is in the insertion position. The opening angle is adjusted by moving the blades slightly up and down, and the opening and closing angles are freely controlled by moving the blades upward when the blades are open and downward when the blades are closed.

(Function) In the vertical shaft excavation method using the bottom-expanding excavation device of the present invention, first, a tip pipe with a vertical angle-shaped bottom of a humu pipe is placed on the ground surface B at the planned excavation position, and The stratum is gradually excavated with an earth drill machine until a predetermined depth is reached, and then the outer peripheral area of the tip tube is excavated to expand the bottom, and the excavation is performed in an open state as shown in Fig. 2. When pulling out excavated earth, gravel, etc. to carry out, or reinserting, the slide ring is repeatedly inserted and removed as it rotates on the inner wall of the hume pipe in a closed state as shown in Figure 1. The guide part slides on the inner wall of the pipe to align the excavation direction with the burying direction of the Huyum pipe, and the Huyum pipe automatically descends gradually due to its own weight and is buried until it reaches a predetermined depth. Construction is carried out by repeatedly performing the above-mentioned work.

(Effects of the Invention) As explained above, this device does not use any other power source, and the guide part is attached to the second rotating shaft that extends from the rotating shaft of an earth drilling machine that is commonly used for underground excavation. Because of this, there is no distortion or inclination of the buried hume pipe, and because a slide ring is provided at the end of the excavation wing, smooth insertion and removal can be performed. By using the feathers to expand the stratum around the bottom of the tip hume tube to be buried, the hume tube can be gradually lowered and buried to a predetermined depth. The excavation work of the pit can be completed accurately and in a short time from the top pipe to the tip pipe, and the mechanism of this device is extremely simple, eliminating any mechanical troubles. It is extremely easy to handle, and even unskilled workers can perform the specified burial work by simply continuing the excavation method with the earth drill machine in use, and can be provided at a low price. It is a device.

[Brief explanation of drawings]

FIG. 1 is a schematic vertical cross-sectional view showing the bottom-expanding excavation device of the present invention inserted into a Huum pipe. FIG. 2 is a schematic vertical cross-sectional view in the excavated state. FIG. 3 is a sectional view of the slide ring. Fourth
The figure shows the development of the slide ring (expanded bottom wing) into the tip of the Huium's canal. A... Huyum tube, B... Earth surface. DESCRIPTION OF SYMBOLS 1... Rotating shaft of earth drill machine, 2... Second rotating shaft, 3... Guide part, 4... Taper part, 5... Locking plate, 6...
... Expanding wing, 7... Base end, 8... Excavation blade, 9...
Slide ring, 10...hanging metal fitting, 11...coil spring, 12...pivot pin, 13...angle restraining pin.

Claims (1)

[Scope of Claims] 1. A device used in a construction method in which preliminary excavation is performed using an earth drill machine, and Huyum pipes, etc. are successively connected, fixed, stacked, and buried underground, the tip of the rotating shaft of the earth drill machine A cylindrical guide having an outer diameter slightly smaller than the inner diameter of the hume tube and capable of sliding up and down inside the tube is provided above the second rotation shaft, and has an outer diameter slightly smaller than the inner diameter of the hume tube. The upper and lower ends of the guide part each form a tapered part that slopes inward, and one side of a plurality of locking plates is fixed to the periphery of the lower end of the second rotating shaft so that the guide part extends radially and They are arranged at equal intervals, and the proximal ends of the enlarged bottom wings are rotatably pivoted to appropriate positions of the respective locking plates, and the other ends of the enlarged bottom wings are formed with digging blades. The outer end of the tube is provided with a sliding ring shaped like a door wheel, a hanging metal fitting is provided on the second rotating shaft of the upper part of the locking plate, and the hanging metal fitting and the enlarged bottom wing are connected by a coil spring. Bottom-expanding excavation equipment for underground construction methods such as