JP2839985B2 - Reverse construction method for structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
That is, the present invention relates to a reverse construction method for sequentially constructing structures from the ground level to the underground.

[0002]

2. Description of the Related Art As shown in FIG. 6, a vertical strut 12 is constructed by erection of a vertical pillar 12 from the ground into a hole 10 excavated in advance.
In this construction method, the underground structure is constructed sequentially from the ground level using this straight pillar. The vertical load of the structure is borne by the straight pillar, and the earth pressure from the outside is built. Pause with structures. According to the reverse construction method, the construction work on the ground can be performed in parallel with the construction work underground, so that the construction period can be shortened.

[0003]

On the other hand, since the underground work is an operation below the constructed structure, the transportation of the equipment is limited to only the openings provided intentionally. As a result, in particular, both vertical and horizontal movements when carrying long and heavy materials require more time and effort than normal underground construction.

In order to increase the efficiency of the reverse hitting method, it is necessary to reduce the size and weight of the material to be carried in. One solution is to lengthen the beam portion 16 to be attached to the vertical column 12. However, the beam portion 16 is limited by the diameter of the pile 14, that is, the diameter of the hole 10, and is limited in lengthening.

An object of the present invention is to provide a method of reversely hitting a structure capable of reducing the size and weight of materials to be carried underground.

[0006]

Means for Solving the Problems, Functions and Effects The present invention is a reverse strike method for sequentially constructing structures from the ground level to the underground. In this construction method, a beam material to be a beam on the basement floor is temporarily attached to a timber pillar so that the beam material faces up and down, and this timber beam is erected in a hole provided in the ground and fixed.
Thereafter, the method includes exposing the beam material by root cutting, releasing the temporary attachment of the beam material, and then permanently attaching the beam material to a predetermined position of the straight pillar.

[0007] A beam material to be a beam is temporarily attached to a straight pillar so that the beam material is directed vertically, and the beam material is built together with the straight pillar into a hole. Root the ground that should be the basement floor,
When the beam material is exposed, the temporary attachment of the beam material is released, and the beam material is permanently attached to a predetermined position of the straight pillar in a predetermined direction.

In a state in which the beam is temporarily attached to the vertical pillar so that the beam is oriented in the vertical direction, even if the entire beam is large enough to be inserted into a hole provided in the ground, the beam is not Since the length, that is, the length in the vertical direction when erected, can be arbitrarily determined irrespective of the diameter of the hole, the beam member can be formed to be long. As a result, after that, it becomes unnecessary to carry in the material, or even if necessary, it is sufficient to carry in a small and lightweight material, and the work efficiency of the underground construction can be improved.

In order to carry small and light materials,
The loading opening may be small. This facilitates the subsequent refilling operation. In addition, since there is no carry-in of long or heavy materials, work safety can be improved, and the construction period can be shortened.

When the height of the underground floor is larger than half the distance between the timber pillars arranged next to each other, the beam members that are horizontally attached to the timber pillars arranged next to each other are It is preferable that these beams have a length that results in a beam having a predetermined length by abutting each other.

A beam having a predetermined length can be obtained by abutting beam members horizontally attached to the straight pillars arranged next to each other, so that materials for the beams are substantially unnecessary. . According to this aspect, the work efficiency of underground construction can be further improved.

When the height of the basement is smaller than half of the distance between the timber pillars arranged next to each other, the beam members which are horizontally attached to the timber pillars arranged next to each other are It is possible to arrange another beam member between these beam members to form a beam having a predetermined length.

[0013] It is necessary to carry in another beam material, but since the other beam material can be formed small and lightweight, the carrying-in work is easy.

[0014] It is preferable that a lower end of the beam is temporarily attached to the straight pillar via a hinge at a beam level on a basement floor. In this case, the upper end of the beam material is temporarily attached by hooking a hook on a straight pillar or tying it with a wire or a rope.

When the temporary attachment is released and the beam material is permanently attached to the straight pillar, the beam material is simply rotated about the hinge to complete the preparation for the permanent attachment of the beam material. Efficiency can be improved.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The reverse construction method of a structure is a method of sequentially constructing a structure from the ground level to the underground. As shown in FIG. The beam member 20 is temporarily attached to the vertical column 22 so that the beam member 20 faces in the vertical direction. Here, the expression that the beam 20 is oriented in the vertical direction means that the beam 20
This means that the length direction is vertical and slightly oblique.

The beam member 20 is made of steel frame or precast concrete, and as will be described later, when the pillar 22 is fixed to a pile, the pillar 22 is at the beam level of each floor underground.
At or near this position. In the temporary attachment,
As shown in the drawing, the lower end of the beam 20 is attached to the vertical column 22 with a hinge 24, and the upper end of the beam 20 is
In addition to the temporary fastening by hooking on the truss pillar 22 by the method 6, a temporary fastening with a bolt and a nut, a binding with a wire or a rope, or an appropriate combination of these can be selected.

If the beam 20 is temporarily attached to a position at a beam level on each basement floor by using the hinge 24, the temporary attachment is released and the beam 20 is attached to the straight pillar 22 as described later. At the time of actual attachment, the beam material 20 is simply rotated in a horizontal state around the hinge 24, and preparation for actual attachment of the beam material 20 is completed.

When the hinge 24 is used for temporary attachment, a plurality of beam members 20 are separated from each other by 90 ° in plan view at a position at the beam level of each floor, depending on the position occupied by the trussed pillars 22 in the structure. At three places, or 90 degrees apart
Or 4 places 90 ° apart or 2 180 ° apart
Temporarily attach to the framed pillar 22 at the location.

The straight pillar 22 is formed of a steel frame having a circular, square, or other known cross-sectional shape. At a factory or on site, a timber pillar 22 temporarily attached with a beam 20 necessary for a predetermined number of floors is built into a hole 28 that has been previously excavated (FIG. 1), and concrete 30 is placed at the bottom of the hole 28. The pile is formed by casting, and the timber pillar 22 is fixed at a predetermined level (FIG. 2). Then, the hole 28
Backfill. This is to prevent the earth and sand around the hole 28 from collapsing, and to prevent the structural pillar 22 from being deviated from the normal position.

After fixing the trussed pillar 22, as shown in FIG. 3, the beam 20 is exposed by excavating until reaching a predetermined depth D from the ground surface G, and the temporary attachment of the beam 20 is released. afterwards,
The beam member 20 is set to a horizontal position, and is permanently attached to a predetermined position of the vertical column 22. The actual attachment is performed by welding, bolting, riveting, or the like.

A predetermined number of straight pillars 22 are erected at predetermined locations by the above-described procedure, roots are cut off from the ground surface, and beams 20 are permanently attached. Then, as shown in FIG. The beam members 20 fixed to the pillars 22 are respectively butted, and the beam members 20 are firmly joined to each other by passing the joint plate 32 therebetween.
Get.

As shown in FIG. 5A, the height H of the basement is
When the distance L between the straight pillars 22 arranged next to each other is greater than half, the beam members 20 which are respectively horizontally attached to the straight pillars 22 arranged next to each other, are formed by combining these beam members 20. By abutting each other, it can be formed to have a length that becomes a beam 34 of a predetermined length.

When the height H of the basement is smaller than half the distance L between the vertical columns 22 arranged next to each other as shown in FIG. The beam members 20 ′ that are fixed to the pillars 22 horizontally are respectively composed of these beam members 2.
0 ', another beam member 36 is arranged to provide a beam 38 of a predetermined length.
It can be formed to have the following length. In this case, the beam 36 is carried in from the ground.

[Brief description of the drawings]

FIG. 1 is a side view showing a method of reverse striking a structure according to the present invention, showing a state where a straight pillar is erected in a hole.

FIG. 2 is a side view showing a method of reversely hitting a structure according to the present invention, and shows a state in which a straight pillar is fixed to a hole.

FIG. 3 is a side view showing a method of reversely hitting a structure according to the present invention, showing a state where roots are cut off.

FIG. 4 is a side view showing a method of reversely hitting a structure according to the present invention, and shows a state in which a beam material permanently attached to each of the straight pillars arranged next to each other is formed into a beam.

FIG. 5 is a side view showing a method of reversely hitting a structure according to the present invention, showing a relationship between beam members which are permanently attached to each of the straight pillars arranged adjacent to each other.

FIG. 6 is a side view showing a conventional method of reverse striking a structure.

[Explanation of symbols]

 Reference Signs List 20 beam material 22 trussed pillar 24 hinge 28 hole 30 pile 34 beam

Claims (4)

(57) [Claims] 1. A reverse striking method for sequentially constructing a structure from the ground level to the underground, wherein a beam material to be a beam on an underground floor is temporarily formed into a straight pillar so that the beam material is directed vertically. The pillars are erected and fixed in the holes provided in the ground, and then the roots are cut off to expose the beams, and the beams are released from temporary attachment. A method of reverse striking a structure, including permanent attachment to a predetermined position of a pillar. 2. The underground floor height is greater than half of the distance between the timber pillars arranged next to each other, and the beam members are horizontally attached to the timber pillars arranged next to each other. The method of claim 1, wherein the beam has a length that becomes a beam having a predetermined length by abutting the beams on each other. 3. The underground floor height is smaller than half of the distance between the timber pillars arranged next to each other, and the beam members are horizontally attached to the timber pillars arranged next to each other. The method of claim 1, wherein another beam is disposed between the beams, and the beam has a length that becomes a beam having a predetermined length. 4. The method according to claim 1, wherein the lower end of the beam is temporarily attached to the straight pillar via a hinge at a beam level on the basement floor.