JPH0522630U - Drop core hanging device - Google Patents

Abstract

(57) [Abstract] [Purpose] It is mainly used in the pillar-line type underground continuous wall construction method using soil cement piles and is used when building core materials such as H-section steel that reinforces the continuous walls, and the accurate top of the core material is used. To provide a hanging device for a dropped core member that can be positioned and can easily maintain the core member at a predetermined position. In a hanging device of a dropped core member, a lower end screw groove 2 to be screwed into a nut 13 fixed to a core member 12 is provided at a lower end of a hanging rod 1, and an upper screw groove reaching an upper end is provided above. 3 is provided, and the height adjusting fitting 4 is screwed into the upper spiral groove 3
A horizontal support surface 6 is formed on the lower side, a horizontal rotation handle 7 is projectingly provided on the side portion, and a hanging plate 8 having a hanging through hole 9 is formed on the upper end of the hanging rod 1. Is fixed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates mainly to a hanging device for a drop core material used when building an H-shaped steel or the like, which is a core material for reinforcing a continuous wall, in a column-column type underground continuous wall construction method using soil cement piles. .

[0002]

[Prior Art]

 In the column-type underground continuous wall construction method using soil cement piles, in order to reinforce the column-row wall body, a core material such as H-section steel is pillared while the soil cement agitated and kneaded by an excavation stirrer is uncured. A method is used in which the soil cement is hardened integrally with the core material by dropping it into the row wall body and inserting it. In order to drop and insert the core material into the soil cement in this reinforcing means, a through hole is conventionally provided at the upper end of the core material, and a sling wire is inserted through this through hole, and the sling wire is attached to the crane. The core material is hung on a hook and hung to suspend it at a predetermined position on the column wall, and the crane hook is lowered to drop the core material into the soil cement by the weight of the core material and insert it. Another method is to insert a vibrator between the core and the hook of the crane, and use the dead weight of the core and the vibration of the vibrator to drop the core into the soil cement and insert it. ing.

In the case of carrying out the work by these methods, after dropping the core material into the soil cement and inserting it, the crane and the vibrator are to be removed from the core material for the next work, but the uncured material is uncured. The core material inserted in the soil cement will continue to sink due to its own weight if it does not have any means for holding its position, so it will have a predetermined height that matches the design of the underground wall. It becomes impossible to maintain the core material. In order to prevent the sinking of the core after removing the crane in this way, the top of the core is positioned while the conventional crane is installed, and in order to secure that position, the through hole provided at the upper end of the core has a number line. A means such as tying this through a temporary member arranged above the core material is adopted. However, in the position securing means as described above, many parts rely on manual work, and since the position is adjusted by a crane, it is necessary to accurately position the top of the core material or to set the core at a predetermined position. It is extremely difficult to maintain the timber, and in general, the top of the core is buried in the soil cement when it is dropped into place, so it cannot be seen from the outside, and the dropped core It was not possible to confirm in what direction the material was positioned in the plane.

[0004]

[Problems to be solved by the device]

 Therefore, the problem to be solved by the present invention is that the top of the core material can be accurately positioned and the core material can be easily maintained at a predetermined position, and the whole core material is embedded in the soil cement. It is an object of the present invention to provide a hanging device for a dropped core material, which can confirm the planar orientation of the dropped core material even afterwards.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the drop core hanging device of the present invention is provided with a lower end thread groove to be screwed into a nut fixed to the upper end of the core material at the lower end, and reaches the upper end above. A hanging rod provided with an upper screw groove, and a vertical hole in which an inner screw groove is provided in the vertical direction of the central portion, and an upper screw groove of the hanging rod is screwed into the inner screw groove, and a lower hole is formed. Is provided with a horizontal support surface, and a side portion is provided with a height adjusting fitting on which a horizontal rotating handle is projected, and a hanging through hole which is fixed to the upper end of the upper screw groove of the hanging rod. The main feature is that it consists of a hanging plate.

[0006]

【Example】

 The detailed features of the present invention will be described with reference to the embodiments illustrated in the accompanying drawings. 1 and 2 show the use of the dropping core material suspending device according to the present invention in the uncured soil cement 11 in which the excavation stirrer is provided with the excavation hole 10 in the ground and mixed and stirred therein. A core member 12 such as an H-shaped steel is shown in a state that it has already been dropped and inserted. First, in this state, the hanging device of the drop core material according to the present invention will be described. Reference numeral 1 is a hanging rod in the device of the present invention, and a lower end screw groove 2 is formed at its lower end. There is. The lower end screw groove 2 can be screwed into a nut 13 fixed by welding or the like to an upper end portion of a core material 12 such as H-shaped steel. In FIG. 1, the lower end screw groove is shown for convenience of illustration. 2 is described on the nut 13, but when the lower end screw groove 2 is actually screwed into the nut 13, the lower end screw groove 2 is rotated by the end of the screw groove abutting against the nut 13. The lower end thread 2 cannot be seen on the nut 13 from the outside because it is screwed in until it is no longer present. The reference numeral 14 in the core 12 indicates a slinging hole for directly suspending the core 12 with a crane, and the reference numeral 15 indicates when removing the crane which directly suspends the core 12. The through hole for a temporary receiving for inserting a temporary receiving rod is shown.

An upper screw groove 3 reaching the upper end is formed above the hanging rod 1 in the device of the present invention, and an inner screw of a vertical hole 5 vertically provided in the central portion of the height adjusting metal fitting 4 is formed. The height adjusting fitting 4 is attached to the suspension rod 1 in a state where the groove is screwed into the upper spiral groove 3. A horizontal support surface 6 is formed below the height adjustment fitting 4. The support surface 6 of the height adjusting metal fitting 4 is a U-shaped receiver in a plan view which is bridged between the guide members 16 and 16 installed so as to be arranged in parallel on both sides of the row of the drill holes 10. The suspension rod 1 is arranged on the base member 17 so as to pass through the inner space formed by the U-shape of the pedestal member 17, and is rotatably mounted. Note that reference numeral 18 indicates a pillow material on which the guide members 16 and 16 are placed. On the side of the height adjusting fitting 4 in the device of the present invention, a horizontal rotating handle 7 is provided in a protruding manner. If the handle 7 for horizontal rotation is a handle bar in which a male screw hole provided at one end is screwed into a female screw hole formed on the side surface of the height adjustment fitting 4, the handle bar can be attached and separated. If the handle bar has one end welded to the side surface of the height adjustment fitting 4, it is possible to provide a simple and inexpensive structure.

A suspension plate 8 is fixed by welding or the like to the upper end of the upper screw groove 3 of the suspension rod 1 in the device of the present invention. The hanging plate 8 has a through hole 9 for hanging for hanging by a crane, and is usually used for slinging. A method of using the drop core hanging device according to the present invention having the above structure will be described below. First, the uncured soil cement 11 in the drilled hole 10 is positioned to determine the position where the core material 12 is dropped. Usually, a built-in ruler (shown in the figure) is provided with a cutout portion in the partial or full cross-sectional shape of the core material 12 so that a part or the whole cross-section of the core material 12 can pass through without moving and rotating in the front-rear direction. No.) is attached to a predetermined position of the guide member 16 for positioning. Next, after suspending the core material 12 by a crane using the slinging hole 14 of the core material 12, the core material 12 is moved forward and backward and left and right without rotating the hollowed part of the built-in ruler. It is lowered so as to pass through, and the dropping of the core material 12 into the soil cement 11 is started.

A pair of temporary cradle members (not shown) that are parallel to each other between the guide members 16 and 16 when the top of the core member 12 approaches the upper surfaces of the guide members 16 and 16 as the dropping proceeds. Are installed so as to sandwich the core material 12, and a temporary receiving rod is inserted into the temporary receiving through hole 15 of the core material 12 so that both ends thereof are placed on the pair of temporary receiving base members. When the core 12 is lowered and the load of the core 12 is supported by the temporary receiving rod, the sling of the crane is removed from the slinging hole 14 of the core 12. At this stage, the drop core hanging device according to the present invention is attached to the core 12 by screwing the lower end screw groove 2 of the hanging rod 1 onto the nut 13 which is welded and fixed to the upper end of the core 12 in advance. . This screwing is performed by screwing until the last part of the lower groove 2 abuts on the nut 13 and cannot rotate. Next, the device of the present invention in which the core material 12 is attached to the crane is slightly lifted by using the through hole 9 for hanging of the hanging plate 8 according to the device of the present invention, and the temporary receiving rod and the pair of temporary receiving base members are lifted. After removing the pedestal, the pedestal member 17 having a U-shape in a plan view is passed over the guide members 16 and 16, and the suspension rod 1 passes through the inner space formed by the U-shape of the pedestal member 17. Place and place as you would.

The distance from the top surface of the core material 12 to the support surface 6 of the height adjusting fitting 4 is set in advance so that the core material 12 is located at a predetermined position corresponding to the design of the underground wall. The height of the height adjustment metal fitting 4 is set when the support surface 6 of the height adjustment metal fitting 4 comes close to the pedestal member 17 since the adjustment metal fitting 4 is rotated and set approximately. It is rotated by the horizontal rotation handle 7 to make a fine adjustment to set the final height position of the core material 12. After that, the support surface 6 of the height adjustment metal fitting 4 contacts the pedestal member 17. Continue dropping further until it is placed. After the dropping, the hardening of the soil cement progresses, and when the core material 12 does not further settle, the suspension rod 1 is rotated with respect to the nut 13 of the core material 12 in the direction opposite to the screwing direction to suspend the suspension rod. 1 is removed from the nut 13, and the whole device of the present invention is hoisted and collected.

[0011]

[Effect of the device]

 The present invention has the following effects. A. According to the present invention, the distance from the top surface of the core material 12 to the support surface 6 of the height adjusting metal fitting 4 can be accurately determined by adjusting the height adjusting metal fitting 4, so that the core material on the underground wall It is possible to accurately set the position of the top surface of 12 and the height position of the core material 12 on the underground wall without any troublesome work. B. According to the present invention, the position of the dropped core material 12 can be sufficiently maintained through the hanging rod 1 and the height adjusting metal fitting 4, so that the core material 12 exists in the uncured soil cement 11. Nevertheless, there is no risk of an unexpected situation in which the core material 12 sinks from the initial position.

C. According to the present invention, the device of the present invention is installed when the top of the core material 12 is exposed to the ground surface during the dropping operation, and at that time, the lower end screw groove 2 of the suspension rod 1 is attached to the core material 12. It is screwed into the nut 13 fixed to the shaft until it cannot be rotated, and then the dropping operation is continued. Therefore, when the screwing is completed, the positional relationship between the cross-sectional direction of the core 12 and the direction of the hanging plate 8 is determined. If checked, even if the top of the core material 12 is buried in the soil cement 11 after the dropping operation proceeds, the direction of the cross-sectional shape of the core material 12 can be confirmed by observing the direction of the hanging plate 8. Because it is possible, it is useful for improving the construction accuracy. D. The drop core suspension device according to the present invention has a simple structure and can be manufactured at a low cost, so that an increase in construction cost can be prevented.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of a drop core suspension device according to the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

[Explanation of symbols]

1 Hanging Rod 2 Lower End Threaded Groove 3 Upper Threaded Groove 4 Height Adjusting Metal Fitting 5 Vertical Hole 6 Supporting Surface 7 Horizontal Rotating Handle 8 Hanging Plate 9 Hanging Through Hole

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[Procedure amendment]

[Submission date] September 24, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

Claims (3)

[Scope of utility model registration request] 1. A suspension rod having a lower end threaded groove at its lower end to be screwed into a nut fixed to the upper end of the core material, and an upper threaded groove at its upper end to reach the upper end, and a vertical direction of a central portion. A vertical hole in which an inner thread is formed, and an upper thread of the suspension rod is screwed into the inner thread, and a horizontal support surface is formed on the lower side and horizontal rotation is provided on the side. A hanging core member comprising: a height adjusting metal fitting provided with a protruding handle; and a hanging plate fixed to an upper end of an upper screw groove of the hanging rod and provided with a hanging through hole. apparatus. 2. The handle for horizontal rotation is a handle bar in which a male screw portion provided at one end is screwed into a female screw hole formed on the side surface of the height adjusting metal fitting. The hanging device for the drop core material described. 3. The hanging device for a dropped core member according to claim 1, wherein the horizontal rotating handle is a handle bar having one end welded to a side surface of the height adjusting metal fitting.