JPH05311653A - Tension reinforcing body constructing device - Google Patents

Abstract

PURPOSE:To safely reinforce the ground with a large-diameter tension reinforcing body. CONSTITUTION:A tension reinforcing body constructing device is constituted of a mobile bogie 1, an excavating/stirring device mounted on the bogie 1, and a core material 3 having a screw 31 at the tip, and the excavating/stirring device is constituted of a hollow rotary shaft 63 through which the core material 3 and cement milk can pass and excavating blades 62 and stirring blades provided on the periphery of the rotary shaft 63. A tip hole having the diameter larger than the diameter of the shaft of the core material 3 is opened at the tip of the hollow rotary shaft 63. The core material 3 is penetrated into the tip hole, and the screw 31 portion at the tip of the core material 3 is exposed to the outside from the tip of the rotary shaft 63.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for constructing a tensile reinforcement for reinforcing the ground immediately after cutting or general ground.

[0002]

2. Description of the Related Art Various devices have been developed for constructing a reinforcing body for preventing collapse of a slope that has just been cut or for reinforcing general ground.

[0003]

However, the conventional techniques have the following problems, for example, when the construction is carried out in the immediate vicinity of the railway being used. <B> With the conventional device, it is difficult to perform the reinforcement work without affecting the surrounding ground. <B> Especially if it is a device that improves the soil with a large diameter,
It is dangerous because it may cause the surrounding sediment to collapse. <C> If it is a device that improves soil with a small diameter, the risk will be less, but the construction will take time and time. <D> There are few devices that can be installed on narrow sites or sites with limited height, such as construction in cities.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to improve the above points, and provides a tension reinforcing body construction apparatus capable of safely reinforcing the ground by using a large diameter tension reinforcing body. The purpose is to do.

[0005]

[Means for Solving the Problems] That is, the present invention comprises a movable carriage, an excavation stirring device mounted on the carriage, and a core material provided with a screw at a tip thereof. It consists of a hollow rotating shaft that allows passage of the core material and cement milk, an excavation blade and a stirring blade provided around the rotating shaft, and the diameter of the hollow rotating shaft tip is larger than the diameter of the core material shaft. The apparatus for constructing a tensile reinforcement body is configured by opening the tip hole of the above, and penetrating the core material through the tip hole to expose the screw portion at the tip of the core material to the outside from the tip of the rotating shaft.

[0006]

Therefore, the present invention is <a> a tensile reinforcement construction device that can be constructed without a collapse of the surrounding ground because the excavated soil and cement milk are stirred and mixed in the ground while excavating the ground. <B> When constructing a tensile reinforcement column with a hollow rod for excavation and stirring, the core material can be inserted through the hollow of the rod into the ground at the tip of the tensile reinforcement column, and the core material can be placed at the center. It is a body construction device. <C> Since the periphery of the core material is hardly stirred, it is surrounded by the mortar discharged when the stirring hollow rod is pulled out.
It is a tension reinforcement body construction device capable of firmly adhering the core material and the surrounding improved earth and sand.

[0007]

Embodiment 1 An embodiment of the construction apparatus of the present invention will be described below with reference to the drawings. <A> Overall Configuration The construction apparatus of the present invention is composed of a movable carriage 1, a hollow rod 6 for excavation and stirring mounted on the carriage 1, and a core 3. The trolley 1 is a vehicle body that can be driven by ordinary crawler belts and tires, and a guide rail 4 whose angle can be adjusted is mounted on the upper portion thereof. The guide rail 4 is provided with a rotary drive device 5 movable on the rail.
A hollow rod 6 for excavating and stirring is attached to the.

<B> Excavation / Agitation Hollow Rod 6 The hollow rod 6 for excavation / agitation mounted on the carriage 1 is a device in which an excavation blade and an agitation blade are provided around the tip of the hollow rotating shaft 63. The rotating shaft 63 is formed by a hollow long pipe-shaped cylindrical body. Cement milk is supplied from the rear end of the rotary shaft 63 or the core material 3 is inserted through the cavity inside the rotary shaft 63. Therefore, a cement milk discharge port is formed around the tip of the hollow rod 6. Therefore, the cement milk supplied through the cavity of the rotary shaft 63 is supplied to the excavated soil through this discharge port. Further, a tip hole having a diameter larger than the diameter of the shaft of the core material 3 is opened at the tip of the hollow rotary shaft 63.

<C> Excavation blade, stirring blade The excavation blade 62 is fixed around the tip of the hollow rotary shaft 63. Therefore, the ground can be excavated as the rotary shaft 63 rotates. The tooth profile of the excavation blade 62 has a spiral shape and is divided into a plurality of parts. The excavation blade 62 not only excavates, but also functions to stir the excavated soil and the cement milk and to push back the mixture of the excavated soil and the cement milk when pulling out the excavation stirring rod 6. The stirring blade is fixed to the periphery of the hollow rotary shaft 63 at the rear part of the excavating blade 62 so that the soil and the cement milk can be stirred as the rotary shaft 63 rotates. This stirring blade is composed of a plurality of blades and has a spiral shape. The shape of this spiral serves to extrude the mixture like the excavation blade 62. The co-rotation preventing blade is arranged around the hollow rod 6 between the excavating blade 62 and the stirring blade.

<D> Core material 3 The core material 3 is a member arranged inside the hollow rotary shaft 63 during construction. As the core material 3, a reinforcing bar, FRP, carbon, steel pipe or the like is used. This core material 3 has a high tensile strength,
It is particularly desirable that the material can maintain its strength for a long time and is difficult to oxidize. A screw 31 is provided at the tip of the core material 3. The screw 31 is a spiral band-shaped body having a certain angle, and is formed at an angle that bites into the ground by applying a rotational force to the core material 3. On the other hand, as described above, at the tip of the hollow rotary shaft 63, a tip hole having a diameter larger than the diameter of the shaft of the core material 3 is opened. Therefore, the core material 3 is arranged so as to penetrate the tip hole. As a result, only the screw 31 portion at the tip of the core material 3 is exposed from the tip of the hollow rotary shaft 63 to the outside in a freely rotatable state.

[0011]

[Method of use] Next, a method of using the device of the present invention will be described. <a> Moving the device By moving the trolley 1, the trolley 1 approaches the position where the reinforcing body is constructed.

<B> Excavation stirring and discharging The rotary drive device 5 mounted on the carriage 1 is driven. Then, the rotary shaft 63 of the hollow rod 6 for excavation stirring rotates, and the rod 6 advances while excavating the ground. At this time, the cement milk is discharged from the discharge port near the tip of the rotary shaft 63. Since the rotary shaft 63 is rotating at the same time as the discharge, the excavated soil and this cement milk are stirred by the stirring blade. As a result, the reinforcing body 7 having a large diameter, which is made of earth and sand mixed mortar (soil mortar), is completed.

<C> Fixing of the core 3 When the excavation to the deepest part and the stirring are completed, the rotation of the rotary shaft 63 is stopped. Then, the core material 3 penetrating through the cavity of the rotating shaft 63 is rotated from the rear. Since the tip of the core material 3 penetrates the tip hole and the screw 31 part is exposed to the outside, the tip of the screw bites into the ground by the rotation of the core material 3. In this way, the tip of the core material 3 can be made to bite and fix in the ground which is not excavated and stirred.

<D> Extraction of Stirring Rod 6 Next, the rotating shaft 63 is rotated in the direction opposite to that at the time of excavation. Then, the stirring rod 6 is gradually retracted and can be pulled out to the outside with the core material 3 left. At this time, by appropriately adjusting the rotation speed in the opposite direction and the withdrawal speed, the rod 6 can be withdrawn while the soil of the improved reinforcement body 7 is compressed toward the tip. In this case, the tip of the core material 3 located at the center of the rotary shaft 63 is digging into the ground. Therefore, the rod 6 can be pulled out while being accurately positioned in the center, and the position of the core 3 is not deviated from the center of the reinforcing body 7.

<E> Discharge of mortar When the rod 6 is pulled out, the volume of the hollow rotary shaft 63 is insufficient for the earth and sand, and a cavity is created to loosen the surrounding earth and sand. Therefore, when pulling out the rod 6, the rotary shaft 63
Discharge mortar from near the tip of. This mortar will then make up for the lacking volume. Since the center portion of the discharged mortar is not stirred, the periphery of the core material 3 is surrounded by high-quality mortar in which the earth and sand are not mixed so much.

<F> Tensioning of the core material 3 When the rod 6 is pulled out, the tail end of the core material 3 whose periphery is reinforced is exposed outside the hole. The tail end is grasped and pulled by a jack, and a predetermined pulling force is applied to act as an anchor.

[0017]

Since the construction of the construction apparatus of the present invention is as described above, the following effects can be achieved. <A> By using the apparatus of the present invention, the reinforcement 7 can be manufactured and the ground can be improved at the same time. Therefore, it is possible to improve a wide range of ground in a short time without requiring two steps unlike the conventional case. <B> The diameter of the conventional anchor is small. Therefore, the frictional resistance of the surroundings could not be increased. However, the use of the device of the present invention makes it possible to construct a reinforcing body 7 having a large diameter and therefore a large frictional resistance in the surroundings, which is extremely economical. <C> It is possible to construct an improved earth and sand body having a larger diameter than the conventional anchor in the ground. Therefore, it is possible to improve the earth and sand in a wide area by a work that is more efficient than the conventional device that frequently moves the construction position and constructs a large number of anchors. <D> Work can be performed without bringing out the soil to be improved at all. Therefore, railways, roads,
Even when working near a building, there is no danger of sinking the surrounding ground and the work can be performed safely. <C> The improved reinforcing body 7 can be configured as a central reinforcing body 7 of mortar having a high concentration in the central portion and a mixture of earth and sand and cement milk in the periphery. Therefore, the reliable and high-quality reinforcement 7 can be built in the ground. <D> When the hollow rod 6 is retracted, the tip of the core material 3 is digging into the ground, so that the core material 3 can be placed at an accurate position. Therefore, the core material 3 is always located at the center of the improved earth and sand, and even when tension is applied, the pulling force can be reliably transmitted to the ground to obtain high strength. <E> When the excavation stirring rod 6 is pulled out, by appropriately adjusting the rotation speed in the opposite direction and the pulling speed, the rod 6 is compressed in a state in which the soil of the improved reinforcement body 7 is compressed toward the tip. Can be pulled out. Therefore, even if the soil is pulled out, the earth and sand are not loosened, and are compressed and compacted on the contrary, so that a strong reinforcing body 7 can be formed.

[Brief description of drawings]

FIG. 1 is an explanatory view of an apparatus for constructing a tensile reinforcement body of the present invention.

FIG. 2 is an explanatory diagram of its usage state.

FIG. 3 is an explanatory diagram of its usage state

FIG. 4 is an explanatory diagram of a tip hole and a core material.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yukihiko Tamura 2-22-15-106 Katsuradai, Midori-ku, Yokohama-shi, Kanagawa (72) Inventor Fukuda Kosei 2-4-1 Akasaka, Minato-ku, Tokyo Tenox Co., Ltd. (72) Inventor Shigeru Yoshida 2-4-1, Akasaka, Minato-ku, Tokyo Inside Tenox Co., Ltd. (72) Inventor Shuji Kagami 2-4-1-1, Akasaka, Minato-ku, Tokyo Inside Tenox, Inc.

Claims (5)

[Claims] 1. A movable trolley, an digging and stirring device mounted on the trolley, and a core material provided with a screw at a tip thereof. The digging and stirring device can pass the core material and cement milk inside. A hollow rotary shaft, and an excavating blade and a stirring blade provided around the rotary shaft. A tip hole with a diameter larger than the diameter of the core material shaft is opened at the tip of the hollow rotary shaft. The tension reinforcement construction device is configured by penetrating the core into the core and exposing the screw part at the tip of the core to the outside from the tip of the rotating shaft. 2. The tension reinforcing body construction apparatus according to claim 1, wherein the core material that penetrates the distal end hole of the rotary hollow shaft is made of a steel rod material. 3. The tension reinforcing body construction apparatus according to claim 1, wherein the core material that penetrates the tip hole of the rotary hollow shaft is made of fiber reinforced plastic. 4. The tension reinforcing body construction apparatus according to claim 1, wherein the core material that penetrates the tip hole of the rotary hollow shaft is made of carbon fiber. 5. The tension reinforcing body construction apparatus according to claim 1, wherein the core material that penetrates the distal end hole of the rotary hollow shaft is made of a steel pipe.