JPH10148080A - Force-feeding of casing in shaft construction without discharging soil and device for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To force-feed a casing without excavating and discharging soil, by rotating the casing in which a tubular body or a screw rod is provided along the inner wall face and jetting a pressurized fluid from the tubular body and rotating the screw to form a low density zone of soil at the inner wall face of the casing. SOLUTION: A cylindrical casing C made of steel or the like is the front head casing for the construction of a shaft. An excavating cutter C2 is fitted to the lower edge C1 and a tubular body 1 is detachably provided vertically to reach almost the lower edge C1 at the inner wall face C3. The front head casing C is set to a shaft-construction machine and rotated to settle the casing by the force-feeding action while excavating the ground by the excavating cutter C2. Compressed air, pressurized water, or mud slurry according to a soil quality, is jetted from a plurality of ejection holes 1C formed on the tubular body, from a pressurized fluid supplying device through a swivel 3 or the tubular body 1, while excavating the ground. The front head easing C is pressed in the ground while forming a low density zone G2 over the whole peripheral part near the inner wall of the casing C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for press-fitting a casing, which is a shaft material, to a starting shaft, a reaching shaft, or a small shaft such as a manhole in a propulsion method for laying sewerage or the like without digging. It concerns the device.

[0002]

2. Description of the Related Art After a cylindrical steel casing is press-fitted while being rocked by a jack while being swung in a circular arc, the earth and sand in the casing pit is discharged by a general-purpose excavator, and the subsequent casings are joined and connected. The rocking press-in operation is repeated to build a shaft.

[0003]

The shaft construction means for press-fitting a casing as in the prior art described above is characterized in that, at the time of press-fitting, the earth and sand corresponding to the thickness of the casing is pressed into the soil while being pushed laterally. Since the surrounding area of the casing is compacted and the press-in resistance gradually increases and eventually becomes impossible, press-fitting is performed by excavating and discharging the earth and sand in the casing pit during the press-fitting of the casing, and then press-fitting the casing again. ing. However, the technique involves repetition of press-in operation and excavation and discharge operation, which not only complicates the operation, but also equips not only the shaft construction machine but also the excavation and unloading machine for earth and sand, resulting in poor workability.

An object of the present invention is to provide means for press-fitting a casing without earth removal without intervening excavation work during press-fitting of the casing.

[0005]

In order to achieve the above object, a non-discharged press-fitting means for a casing in constructing a shaft is a means for rotating and press-fitting a casing in which a pipe or a screw rod or a paddle rod is vertically provided along an inner wall surface. While rotating with a shaft construction machine equipped with, a pressurized fluid is ejected from an ejection hole on the pipe body, and is rotated on a screw rod and a paddle rod. It is pressed into the soil while forming a density band.

[0006]

According to the present invention, in the process of press-fitting the casing into the soil by the shaft construction machine, the pipe means is blown out with pressurized air, pressure water, pressurized muddy water, and the screw and paddle rod means are agitated by stirring. Loosen the earth and sand around the entire circumference near the inner wall, in other words, the earth and sand form a coarse density zone where the density is coarser than that of the central part, so that the resistance at the time of press-fitting the casing is reduced, and thus the casing is moved to the planned depth It is possible to press-in without excavating soil, and excavation and excavation of earth and sand can be performed after removing the shaft construction machine, so workability is also good.

[0007]

1 is a simplified diagram showing an example of a shaft construction machine, FIG.
FIG. 7 to FIG. 7 show an embodiment of a non-discharged press-fitting device for a casing in the construction of a shaft, FIG. 2 is a vertical sectional side view of the first embodiment, FIG. 3 is a partial plan view, FIG. FIG. 6 is a vertical sectional side view of the second embodiment, FIG. 6 is a vertical sectional side view of the third embodiment, and FIG. 7 is a partial plan view.

In FIG. 1, reference numeral A denotes an example of a shaft construction machine for constructing a shaft with a cylindrical casing made of steel or reinforced concrete. The shaft construction machine A is provided on a base frame 101 and directly above the base frame. The base frame 101 and the lift frame 102 are provided with through holes 103 and 104 at the same central position.
The lifting frame 102 is provided with an external gear 106 having an insertion hole 105 through which the casing C is inserted in the through hole 104 so as to communicate with a hydraulic motor 108 via a transmission gear 107. A chuck mechanism 109 for gripping is provided, and the lifting jack 1 is directed downward.
10 and fix the end of the rod 111 to the base frame 1
Reference numeral C2 denotes a digging blade fixed to the lower end edge of the leading casing C.

Thus, the shaft construction machine A is disposed on a desired shaft construction ground, and the chuck mechanism 1 of the lifting frame 102
09 through the through-hole 105 of the external gear 106 and the through-hole 103 of the base frame 101, the top casing C is inserted and gripped by the chuck mechanism 109, and then transmitted by the hydraulic motor 108 to the transmission gear 107 and the external gear 1.
By lowering the elevating frame 102 with the lifting jack 110 while rotating the leading casing C through the head 06, the leading casing C is rotationally press-fitted and settled while excavating with the excavating blade C2 fixed to the lower end edge. A vertical shaft is constructed by sequentially connecting the succeeding casing C 'to the upper edge of the leading casing C.

The present invention relates to a means for press-fitting the casing C without discharging soil when the casing C is rotationally press-fitted by the shaft construction machine A as described above.

FIG. 2 to FIG. 4 show the first embodiment.
Indicates a cylindrical casing made of steel or reinforced concrete, and the casing C shown in the figure is a leading casing in the construction of a shaft, in which a digging blade C2 is fixed to a lower edge C1, and a substantially lower portion is provided on an inner wall surface C3. The pipe 1 reaching the edge C1 is vertically installed so as to be detachable, a plurality of ejection holes 1C are formed in the pipe 1 over the entire length of the lower end face 1a and the peripheral side face 1b, and the joining means 2 is provided at the upper end. The connecting means 2 is connected to a base pipe 4 provided with a swivel 3, and is connected to a pressure fluid supply device such as air or water or muddy water through the swivel 3.
The subsequent casing C ′ to be joined to the top casing C at the time of the shaft construction does not include the excavation blade C2 at the lower edge C1,
In addition, the joining means 2 is provided by opening the lower end surface 1a of the tubular body 1.

In addition, the ejection hole 1C formed in the pipe 1
Is preferably opened in the direction opposite to the rotation direction of the casing C when the shaft is constructed.
Indicates a coarse density band.

In this embodiment, the top casing C is set on the shaft construction machine A and rotated, so that the soil is gradually sunk by the press-fitting action while excavating the soil with the excavation blade C2. At the same time, pressure air or pressure water or muddy water is ejected from the ejection port 1C through the swivel 3 and the pipe 1 from the pressure fluid supply device, and muddy water is ejected depending on the soil quality. After the front casing C is pressed into the soil to some extent while being formed, the base pipe 4 connected to the pipe 1 is removed, and the subsequent casing C 'is joined to the upper edge of the top casing C, and the pipe 1 The pipe 1 disposed in the subsequent casing C 'is connected to the connecting means 2, and the base pipe 4 is connected and connected thereto again to reach the planned depth while repeating the same operation as described above. Press the casings C and C 'up to The casing C after the press-fitting completion, C'
The earth and sand G inside is excavated by a general-purpose excavator and the like, and the pipe 1 is removed to construct a shaft.

FIG. 5 shows a second embodiment, in which a shaft 5 extending substantially along the inner wall surface C3 of the casing C to the lower edge C1 is rotatably and detachably mounted vertically, and is supported on the upper edge C4. A plate 6 is provided, and a downward motor 7 is provided, and the upper end of the shaft 5 is connected to each other by a joining means 2 provided on a motor shaft 7 a of the motor 7. It is set up,
Instead of the screw 5a, a paddle rod formed by projecting a plurality of rod rods may be used.

In this embodiment, a casing C is rotationally pressed into the soil by a shaft construction machine A, and a shaft 5 is driven by a motor 7.
Is rotated to agitate the underground soil G with the screw 5a over the entire circumference near the inner wall surface C3 of the casing C, and the coarse density zone G2
The following operation is the same as in the above embodiment.

FIGS. 6 and 7 show a third embodiment.
A shaft 5 extending substantially to the lower edge C1 along the inner wall surface C3 of the casing C is vertically installed so as to be rotatable and detachable, and the joining means 2 is provided at the upper end of the shaft 5 to fasten the gear 8. An internal gear 9 having a long tooth width is provided on the outer periphery of the casing C by connecting the gear shaft 8a and fixing the casing C by means such as fixing the casing C to an elevating frame of the shaft construction machine A. A plurality of rods 5b are provided on the peripheral side of the shaft 5 so as to form a so-called paddle rod.

In this embodiment, the gear 8 connected to the fixed internal gear 9 is rotated (rotated) with the rotation (revolution) when the casing C is rotationally pressed into the soil by the shaft construction machine A,
While rotating the shaft 5 and the bar 5b connected to the gear 8,
When the gear 8 descends with the casing C engaged with the internal gear 9 as the press-fitting of the casing C proceeds, the casing C
The underground earth and sand G is stirred by the rod (paddle rod) 5b over the entire circumference near the inner wall surface C3 to form a coarse density zone G2, and the following operation is the same as in the previous embodiment.

According to each of the above embodiments, in the process of press-fitting the casing into the soil by the shaft construction machine, the pipe means is provided with compressed air, pressure water, pressure muddy jets, screws and paddle rod means. By agitation, the earth and sand are loosened around the entire circumference of the inner wall of the casing, in other words, the earth and sand form a coarse density zone where the density is coarsened as compared with the central portion, so that the resistance at the time of press-fitting the casing is reduced, Therefore, it is possible to press-fit the casing to the planned depth without discharging the soil, and the excavation and discharge of the earth and sand can be performed after removing the shaft construction machine, so that the workability is good.

[Brief description of the drawings]

FIG. 1 is a simplified diagram of a shaft construction machine

FIG. 2 is a longitudinal sectional side view of the first embodiment.

FIG. 3 is a partial plan view of FIG. 2;

FIG. 4 is an overall simplified diagram.

FIG. 5 is a longitudinal sectional side view of the second embodiment.

FIG. 6 is a longitudinal side view of the third embodiment.

FIG. 7 is a partial plan view of FIG. 6;

[Explanation of symbols]

 A Vertical shaft construction machine C Casing C2 Drilling blade C3 Inner wall surface 1 Pipe 1C Spray hole 2 Joining means 3 Swivel 4 Base pipe 5 Shaft 5a Screw 5b Bar 7 Motor 8 Gear 9 Internal gear G Earth and sand G1 Coarse density zone

 ──────────────────────────────────────────────────続 き Continuation of the front page (71) Applicant 000177416 Sanwa Kikai Co., Ltd. 2-4-9, Nihonbashi Kayabacho, Chuo-ku, Tokyo (72) Inventor Kenichi Aoki 3-3-1-9 Kanda, Chiyoda-ku, Tokyo Shares (72) Inventor Tatsumi Ochiai 3-19-7 Aoi, Higashi-ku, Nagoya-shi, Aichi Prefecture Inside Yahagi Construction Industry Co., Ltd. (72) Inventor Toshio Miyachi 1-8-16 Matsusakae-cho, Kariya-shi, Aichi Pref. Co., Ltd. (72) Inventor Kenichi Hamaguchi 1-258-2, Nara, Nara Pref.Hamaguchi Gumi Co., Ltd. (72) Inventor Mitsutoshi Torikai 1293, Atocho, Hanamigawa-ku, Chiba-shi

Claims (3)

[Claims] 1. A pipe or a casing in which a screw rod or a paddle rod is vertically installed along an inner wall surface is rotated by a shaft construction machine provided with a rotating and press-fitting means. Method for ejecting a casing in a vertical shaft construction in which the fluid is ejected, and the screw rod and the paddle rod are rotated and pressed into the soil while forming a coarse density zone of earth and sand around the entire inner wall surface of the casing. . 2. A vertically detachable pipe is vertically installed along an inner wall surface of a casing to be rotationally press-fitted when a shaft is constructed, and a plurality of jets for jetting a plurality of pressurized fluids are provided on the lower end face and the entire peripheral side face of the pipe. A non-discharged press-fitting device for casing in a shaft construction with holes. 3. A shaft, in which a rotary stirring means such as a screw rod or a paddle rod which is rotated by a rotating means such as a motor is vertically installed along an inner wall surface of a casing which is rotationally press-fitted during construction of the shaft. Non-discharge press-fitting device for casing in construction.