JP6179020B2 - Housing separation method - Google Patents

Description

The present invention relates to a housing separation in which a pipe material is used when a boundary between the first housing portion and the second housing portion is cut and separated in a housing portion in which the first housing portion and the second housing portion are integrally formed. Regarding the method .

For example, in the case of a reinforced concrete frame part, when the boundary between the first frame part and the second frame part is cut and separated, conventionally, using a rock drill or the like, the first frame part and the second frame part The concrete at the boundary was crushed and separated by gas cutting of rebar as necessary.
However, in the conventional method using a rock drill or the like, there is a problem of pollution due to noise or dust. In recent years, a wire saw has been used, and the wire saw wire is connected to the boundary between the first and second housing parts. There has been proposed a method in which a loop is wound around the outer periphery and a wire saw is driven to cut and separate (there are no appropriate patent documents or the like).

However, in the method using a wire saw, it is necessary to wrap around the outer periphery of the housing part to be cut of the wire of the wire saw, that is, the outer periphery of the boundary between the first housing part and the second housing part.
However, as a practical problem, there are many other objects such as walls on the outer periphery of the boundary between the first housing part and the second housing part. In this case, a wire is inserted into the wall using a drill or the like. An operation for drilling a common hole is required. Furthermore, when the body part to be cut is in the basement, the back side of the base body part is often the ground, and it is very easy to wrap the wire around the outer periphery of the base part to be cut in a loop shape It will be a difficult task.

The present invention pays attention to such problems, and its purpose is to cut the housing part when it is necessary to cut the housing part even if the body part to be cut is an underground body part. An object of the present invention is to provide a housing separation method capable of easily and quickly winding a wire saw wire in a loop shape around the outer periphery of a portion.

A feature of the present invention is that , in a housing part in which a first housing part and a second housing part are integrally formed, a pipe material through which a wire for a wire saw can be inserted, the first housing part and the second housing part, The wire saw using the pipe material installed by a method in which the wire insertion end of the pipe material is located on the cutting work space side by the wire saw in a state along the boundary outer periphery of the pipe A housing separating method for cutting the housing portion with
The frame part is an underground beam that is installed in the course of the reverse driving method, and the first frame part is a temporary underground beam that protrudes toward the retaining wall from the second frame part that is a permanent underground beam. The boundary between the first housing part and the second housing part in which the pipe material is installed is set to be flush with the outer peripheral surface of the main underground structure, and the wire saw is placed in the cutting work space. In addition, the wire is inserted through the pipe material, and the casing is cut using the wire.

  According to the above characteristic configuration, the pipe material through which the wire for the wire saw can be freely inserted is in a state along the outer peripheral portion of the cutting portion of the housing portion, that is, at the boundary outer peripheral portion between the first housing portion and the second housing portion. Since the pipe insertion end of the pipe material is located on the side of the cutting work space with the wire saw, the casing part to be cut is even in the basement. Even if it is a section, by inserting the wire for the wire saw from the cutting work space side through the wire insertion end of the pipe material, along the boundary outer peripheral portion of the first and second housing portions that are the cutting locations Wire for wire saw can be easily and quickly wound in a loop.

In addition , by installing a wire saw in the cutting work space, inserting the wire saw wire into the pipe material installed by the above installation method, and cutting using the wire, it is installed in the implementation process of the reverse hammering method The temporary underground beam that protrudes from the permanent underground beam to the retaining wall side, that is, it is necessary to prevent the retaining wall from collapsing during the reverse driving method. In order to avoid an unexpected load from the earth retaining wall, a temporary underground beam that needs to be finally cut and separated can be easily cut together with the pipe material.
And since the pipe material through which the wire is inserted is installed at the boundary set to be flush with the outer peripheral surface of the permanent underground structure, when the temporary underground beam is cut, the cut surface is the permanent underground structure. It becomes flush with the outer peripheral surface. Therefore, for example, when a part of the temporary underground beam is cut in a state of protruding from the outer peripheral surface of the permanent underground structure, an unexpected load is concentrated on the permanent underground structure through the protruding portion. Acting on is avoided.

  A further characteristic configuration of the frame separating method according to the present invention is that the cutting work space is set on an underground beam located at the uppermost stage among the underground beams to be cut.

  According to the above characteristic configuration, since the cutting work space is set on the underground beam located at the top of the underground beams to be cut, in a state where the wire saw wire is inserted through the pipe material, A wire is wound in a loop shape along the outer periphery of a plurality of underground beams positioned in the vertical direction, and as a result, the plurality of temporary underground beams can be cut at a time.

Longitudinal front view showing the outline of the main part of the underground structure II-II arrow view in FIG. Longitudinal side view schematically showing the main part of another embodiment Cross-sectional plan view showing outline of main part of another embodiment Longitudinal front view schematically showing the main part of another embodiment Longitudinal front view schematically showing the main part of another embodiment

The embodiments of the present invention will be described with reference to the drawings.
The present invention is, for example, as shown in FIG. 1, leaving the existing wall 1 is part of an existing underground structures as earth retaining walls, new underground construction (the設地under construction on the inside of the existing wall 1 This will be done when building 2).
When a new underground structure 2 is newly built while leaving the existing wall 1, although not shown, the existing wall 1 is left as a retaining wall and the existing underground structure is demolished to prevent the existing wall 1 from collapsing. Therefore, soil etc. are thrown into the inside of the existing wall 1 and backfilled, for example, a structural pillar made of a shaped steel is placed, and the underground structure 2 is constructed by the reverse driving method.

In the reverse driving method, first, the upper portion of the backfilled soil is removed to expose the space portion of the first basement floor B1 and the upper space portion of the second basement floor B2, and the structure pillar (not shown) is exposed. Reinforcing bars around it, placing reinforcing bars for underground beams and placing concrete, and the frame part located between the pillar 3a of the B1 part of the first basement B1, the first basement B1 and the second basement B2 As an underground beam 4 is constructed.
The underground beam 4 as the frame part is constructed integrally with the temporary underground beam 4a as the first frame part and the permanent underground beam 4b as the second frame part. It is cut and separated from the main underground beam 4b and, if necessary, disassembled as described later.

That is, in the reverse driving method, after building the first basement B1 part of the underground structure 2, the soil of the second basement B2 part is removed and the second basement B2 part of the basement structure 2 is constructed. It will be repeated sequentially.
Meanwhile, in order to prevent the existing wall 1 from collapsing, it is indispensable to provide the temporary underground beam 4 a between the main underground beam 4 b and the existing wall 1. However, if left as it is, an unexpected load will act on the newly installed underground structure 2 from the existing wall 1 to the permanent underground beam 4b via the temporary underground beam 4a. It is necessary to cut and separate the temporary underground beam 4a and the main underground beam 4b.

Therefore, as shown in FIG. 1, a CD tube (synthetic resin flexible wire tube), a metal tube, or the like through which a wire W (see FIG. 2) for a wire saw (not shown) can be inserted in preparation for cutting at a later date. The pipe material 5 is previously installed at the cutting location.
Specifically, after removing the soil in the B2 part of the second basement, a formwork for the reinforcing wall 6 is assembled, and concrete is placed between the formwork and the existing wall 1 to construct the reinforcing wall 6 To do. Also for this reinforcing wall 6, in order to avoid an unexpected load from the existing wall 1, an insulating polystyrene foam, for example, a styrofoam (on the inner surface of the second floor B <b> 2), is provided on the surface of the constructed reinforcing wall 6. An insulating sheet 7 made of Dow Chemical Co., Ltd.) is attached, and the reinforcing wall 6 to which the insulating sheet 7 is attached is a part of the formwork, and the pillar 3b and the side wall (not shown) of the B2 portion of the basement 2nd floor. Build up.

Before or during the construction of the reinforcing wall 6, the pipe material is brought into a state along the outer periphery of the boundary between the temporary underground beam 4 a as the first frame part and the permanent underground beam 4 b as the second frame part, which are cut portions. 5 is installed.
The pipe material 5 has both end openings 5a, that is, both end openings 5a serving as insertion ends of the wires W of the wire saw, on the side of the cutting work space 8 where the wire saw is installed to perform the cutting operation, FIG. In the case of the embodiment shown, it is installed in a state located on the first basement B1 side.
For example, as shown in FIG. 2 (a), when the reinforcing wall 6 is constructed so as to be flush with the upper surface of the temporary underground beam 4a, both end openings 5a of the pipe material 5 are separated from the reinforcing wall 6. It is installed in a U shape so as to protrude into the upper cutting work space 8. In addition, as shown in FIG. 2B, when the reinforcing wall 6 is flush with the lower surface of the temporary underground beam 4a, the both-end opening 5a of the pipe material 5 is cut upward from the reinforcing wall 6. It is installed in a substantially straight line so as to protrude into the space 8.

In order to carry out the case separation method of cutting the underground beam 4 which is an example of the case portion with the wire saw using the pipe material 5 thus installed, a wire saw ( (Not shown), wire W of the wire saw is inserted from one end of the both ends opening 5a of the pipe material 5 to the other and wound around the outer periphery of the underground beam 4 in a loop shape, and the wire W is used to wire The underground beam 4 is cut together with the pipe material 5 by a saw.
In that case, the pipe material 5 is formed along the outer periphery of the boundary between the temporary underground beam 4a that is the first frame part and the permanent underground beam 4b that is the second frame part, and the columns 3a and 3b and the permanent underground beam. Since it is installed so as to be flush with the outer peripheral surface of the permanent underground structure 2 constituted by 4b and the like, the cut surface by the wire saw is flush with the outer peripheral surface of the permanent underground structure 2.

Further, by using the pipe member 5 described above by cutting the underground beams 4 which is an example of a skeleton portion by a wire saw, to dismantle part of the underground beams 4 cut, like the skeleton separation method described above, A wire saw is installed in the cutting work space 8 on the first basement floor B1, and the wire W of the wire saw is inserted from one end to the other end of the both ends 5a of the pipe material 5, and the wire W is used for the underground beam. 4 is cut.
Also in this case, as in the case of the case separation method, the underground beam 4 which is the frame part is arranged along the boundary between the temporary underground beam 4a and the permanent underground beam 4b. Cut to be flush. However, in this way, rather than as it left the temporary underground beams 4a cut, for example, either completely removed or made to be finely ground as part of the reinforcing wall 6.
Thus, in this method, underground beams 4 is a skeleton unit is equivalent to a beam in existing buildings to dismantle part, temporary underground beam 4a is first Mukuro body, and demolition subject of the skeleton portion 4 In addition, the main underground beam 4b, which is the second frame part, becomes the remaining beam to be left in the frame part 4.

[Another embodiment]
(1) In the previous embodiment, the example in which the existing wall 1 which is a part of the existing underground structure is used as the retaining wall has been shown, but the method of the present invention is a case where a retaining wall is newly constructed. It is also applicable to.
Moreover, in the skeleton separation method, in one underground beams 4, the pipe 5 is placed in the boundary peripheral portion of the temporary underground beam 4a and the設地under the beam 4b is a cut portion, using a wire W of the wire saw In this example, the underground beam 4 is cut. For example, as shown in FIG. 3, the pipe material 5 is installed in a U shape over the plurality of underground beams 4, and the underground beam 4 positioned at the uppermost stage is It is also possible to set a cutting work space 8 above and to separate the plurality of underground beams 4 along the boundary between the temporary underground beam 4a and the permanent underground beam 4b.

(2) In the previous embodiment, an example in which the method of the present invention is applied to the underground beam 4 of the underground structure 2 has been shown, but it can also be applied to a structure newly built on the ground. For example, as shown in FIGS. 4 and 5, when a ground structure 9 including a reinforced concrete column 12, a floor slab 10 and a reinforced concrete wall 11 is constructed, it can be cut or disassembled in the future. It is also possible to install the pipe material 5 in advance at the cut portion of the floor slab 10 or the wall 11 having the property.
In the case of this another embodiment, since there is a space behind the floor slab 10 and the wall 11, a pair of pipe members 5 are installed in a state of penetrating the floor slab 10 and the wall 11. And when the necessity of cutting or dismantling arises, a wire saw is installed in the cutting work space 8, and in the pipe material 5 installed one by one, the wire W is inserted from the opening 5a of one pipe material 5, and the back side Through the space, the wire slab 10 and the wall 11 are cut by pulling the wire W from the opening 5a of the other pipe material 5.
Therefore, in this other embodiment, the ground structure 9 corresponds to the housing part, the floor slab 10 and the wall 11 correspond to the first housing part, and the pillar 12 corresponds to the second housing part.

Further, as shown in FIG. 6, in the wall 11 and the beam 13 of the structure to be built underground, in preparation for future cutting or dismantling, the back side of some of the walls 11 and some of the beams 13 is provided at the time of the construction. It is also possible to install the pipe material 5 while passing through the ground, and to install both end openings 5a of the pipe material 5 on the cutting work space 8 side. Moreover, although not shown in figure, also about the pressure | voltage resistant board located below, the pipe material 5 can also be installed in the state which passes in the ground of the back side like the wall 11 and the beam 13.
In this embodiment, the structure constructed in the basement corresponds to the housing part, a part of the walls 11 and part of the beams 13 correspond to the first housing part, and the remaining walls 11 and the beams 13 correspond to the second housing part. Will do.

DESCRIPTION OF SYMBOLS 1 Earth retaining wall 2 Main underground structure 4 Underground beam as frame part or beam in existing structure 4a Temporary underground beam or demolition beam as first frame part 4b Main underground beam or remaining beam as second frame part DESCRIPTION OF SYMBOLS 5 Pipe material 5a End part for wire insertion of pipe material 8 Cutting work space 9 Ground structure as a frame part 10 Floor slab as a first frame part 11 Wall as a first frame part 12 Column as a second frame part 13 Beam as the first housing part W Wire for wire saw

Claims (2)

In the case part in which the first case part and the second case part are integrally formed, a pipe material through which a wire for a wire saw can be inserted is provided along the boundary outer peripheral part between the first case part and the second case part. The wire using the pipe material installed by the installation method of the pipe material for separating the casing installed in a state and in a state where the wire insertion end of the pipe material is located on the cutting work space side by the wire saw A method of separating a casing by cutting the casing with a saw,
The frame part is an underground beam that is installed in the course of the reverse driving method, and the first frame part is a temporary underground beam that protrudes toward the retaining wall from the second frame part that is a permanent underground beam. The boundary between the first housing part and the second housing part in which the pipe material is installed is set to be flush with the outer peripheral surface of the main underground structure, and the wire saw is placed in the cutting work space. A housing separating method in which the wire is inserted through the pipe material and the housing portion is cut using the wire. 2. The housing separating method according to claim 1 , wherein the cutting work space is set on an underground beam located at an uppermost stage among the underground beams to be cut.

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