JP4908342B2 - Auxiliary raising material for shaft construction member and raising method - Google Patents

Description

  The present invention relates to an auxiliary material for raising a construction member such as an intermediate shaft of a shield tunnel and a method for raising it.

As a construction method for constructing urban tunnels, a shield construction method is used.
For example, in the middle shaft of a tunnel, the shaft peripheral wall is first grooved, the shaft construction member that becomes the core material is built in it, concrete and mortar are filled and solidified, and then the shaft peripheral wall is constructed. An intermediate shaft is constructed by excavating the interior, but before the interior is excavated, the shield penetration part of the shaft peripheral wall may be cut and excavated by the shield machine.
When cutting and excavating the shield penetration part of the shaft peripheral wall before excavating the inside of the shaft, the peripheral wall of the shield penetration part has soil on both sides and the earth pressure is balanced, so that Earth pressure does not work. Therefore, the shaft construction member only has to bear the axial force and compressive force for self-supporting, and only the axial force and tensile force for standing up during construction, so the excavation member of the part to be cut by the shield machine is The thickness can be reduced.

Since the shaft construction member is usually a long member, it is often laid down sideways on a trailer bed during transportation or carrying in, and it is often placed on the site as a groove for a shaft wall. When erected inside, it is necessary to lift it up vertically.
At that time, since the shaft construction member is in a simple beam state with both ends supported and a bending moment acts, the excavation member part may be damaged at the minimum necessary cross-sectional dimension. It was necessary to make it thick.

  An object of the present invention is to provide a standing support member for a shaft construction member and a method for raising the shaft construction member in which no bending moment is generated when the shaft construction member having a drilling member is raised.

1st invention of this application made in order to achieve the said objective is a standing support material of the shaft construction member which consists of a core material and an excavation member, Comprising: The rectangular main-body part longer than the said shaft construction member, An auxiliary material for raising the shaft construction member, comprising support portions provided at both ends in the width direction of the main body portion, and a locking portion extending from the support portion and capable of detachably locking the core material. I will provide a.
According to a second invention of the present application, in the auxiliary material for raising a shaft of the first invention, the locking portion extends from both support portions so as to face each other. Providing uplifting auxiliary materials.
The third invention of the present application is characterized in that, in the upright auxiliary material for the shaft construction member of the first invention or the second invention, the locking portions are provided in the vicinity of the upper end and the lower end of the upright auxiliary material. The raising support material of a shaft construction member is provided.
4th invention of this application is the raising method of the shaft construction member which consists of a core material and an excavation member, Comprising: The standing support material which has the latching | locking part which can latch the said core material of the said shaft construction member In a horizontal posture, the shaft construction member is locked in a horizontal posture, and the shaft construction member is locked in a state where the shaft construction member is locked in a vertical posture, and the shaft construction member and the There is provided a method for raising a shaft construction member, wherein the shaft construction member is moved up and down to disengage the shaft construction member from the assistance material.

The present invention can obtain at least one of the following effects by means for solving the above-described problems.
<1> Since no bending moment is generated in the shaft construction member, the thickness of the excavation member can be reduced, and the manufacturing cost can be reduced.
<2> Since the same upright auxiliary material can be used for a plurality of types of shaft construction members, the construction cost can be reduced.
<3> Since the standing auxiliary material can be diverted, the construction cost can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(1) Outline of Erecting Auxiliary Material As shown in FIG. 1, the structure of the erecting auxiliary material 10 according to the present invention includes a main body 11, support portions 12 provided at both ends of the main body 11, and a support portion. And the locking portion 13.
Moreover, the shaft construction member 20 that is raised by the raising auxiliary material 10 of the present invention includes a core material 21 and a drilling member 22 as shown in FIG.

(2) Shaft construction member As shown in FIG. 2, the shaft construction member 20 to which the standing support material 10 of the present invention is applied has the excavation member 22 attached to the web 211 of the core material 21 made of H-shaped steel or the like. Is.
The excavation member 22 is a member that can be directly excavated by a shield machine, and is made of, for example, an FFU (registered trademark) member in which a hard urethane resin is reinforced with long glass fibers.
The excavation member 22 is fixed to the core member 21 with bolts 23 and nuts.

  As shown in FIG. 4, the shaft construction member 20 is fixed with the core material 21 at both ends of the excavation member 22 as shown in FIG. 2 so that the excavation member 22 is built over the planned penetration range 30 of the shield machine. In addition to the shaft construction member 20, the shaft construction member 20a in which only the upper end of the excavation member 22 is fixed to the core member 21 as shown in FIG. 3A, and only the lower end of the excavation member 22 as shown in FIG. The shaft construction member 20b fixed to the core material 21 is used in combination with a steel material 40 or the like that is a core material outside the excavation range.

(3) Uplifting auxiliary material The uplifting auxiliary material 10 is formed in a substantially U-shaped cross section by a main body 11 and support portions 12 provided at both ends in the width direction of the main body, and extends from the support portion 12. A locking portion 13 is provided.
The main body 11 of the upright auxiliary material 10 is a rectangular member longer than the vertical shaft construction member 20 that raises in order to stabilize the vertical construction member when standing up and prevent damage, such as steel or plastic. Made of hard material. The main body 11 may be provided with a hole or a ladder shape in order to prevent rainwater or soil from being stored or to reduce the weight.

The support portion 12 is provided at both ends in the width direction of the main body 11 over the length direction. Due to the main body 11 and the support portion 12, the raising auxiliary material 10 has a substantially U-shaped cross section in the width direction.
As shown in FIG. 5, the found height of the outer surface of the support portion 12 is made larger than the falling dimension of the flange 212 of the shaft construction member 20 from the web 211. In addition, the height of the inner surface of the support portion 12 that is found is the same as or larger than the dimension from the lower end of the excavation member 22 to the lower end of the web 211.
When the size is increased, a cushioning material 50 or the like is provided and held between the main body 11 and the excavation member 22.
Moreover, when making the found height of the inner surface of the support part 12 the same as the dimension from the lower end of the excavation member 22 to the lower end of the web 211, the main body 11 and the support part 12 are sectioned as shown in FIG. You may comprise in a substantially H shape.
Thus, the shaft construction member 20 is supported by the support portion 12 with the flange 212 floating from the ground, and the lower end of the excavation member 22 is stably supported by the main body 11.

The locking portions 13 are erected from the end portions of the support portions 12 so as to face each other in parallel with the length direction of the auxiliary material 10 that is raised. As shown in FIG. 7, the interval between the engaging portions 13 facing each other is narrower than the width of the web 211 of the core material 21 and wider than the width of the excavating member 22, so that the web 211 of the core material 21 is made wider. The excavation member 22 can be locked without contacting. At this time, the locking recess 121 having a width and a depth that allow the web 211 to be detachably fitted is formed.
In addition to standing upright near the upper end of the standing auxiliary material 10, the locking portion 13 stands upright against the lower end of the standing auxiliary material 10, or as shown in FIG. The auxiliary material 10 can be erected either near the upper end or at the lower end. At that time, the interval between the locking portion 13a near the upper end and the locking portion 13b at the lower end is formed to be substantially equal to the interval between the lower ends of the upper and lower webs 211a, 211b of the shaft construction member 20.

[Action]
Next, the standing up method using the standing up auxiliary material of a shaft construction member is demonstrated.

As shown in FIG. 9A, the shaft construction member 20 that has been horizontally carried into the site is lifted by a crane or the like (not shown).
The shaft construction member 20 can be easily lifted because the excavation member 22 is lightweight. However, since the excavation member 22 is vulnerable to bending and easily breaks, a plurality of shaft construction members 20 are provided in the longitudinal direction so that an excessive bending moment is not applied. The point is supported by the suspension wire 60 and carefully lifted carefully in a horizontal posture.

Next, as shown in FIG. 9B, the shaft construction member 20 is locked in a horizontal posture to the standing auxiliary material 10 that is horizontally lying so that the locking portion 13 is on the upper surface. Since it is locked to the raising auxiliary material 10 lying on the ground, it can be easily locked.
The both ends of the excavation member 22 are fixed to the core member 21 as shown in FIG. 2 by providing the latching portions 13 provided on the standing auxiliary material 10 at the lower end and the upper side in the longitudinal direction of the auxiliary material 10. The core materials 21 at the two upper and lower portions of the shaft construction member 20 can be simultaneously locked and suspended in a stable state.

Next, as shown in FIG. 9C, in a state where the shaft construction member 20 is locked, the shaft is lifted by the suspension wire 60 attached to the upper end of the auxiliary material 10 to be vertical.
Since the raising auxiliary material 10 is made of a hard material, even if only the upper end is lifted, it does not bend excessively. Moreover, since it is longer than the shaft construction member 20, the bending moment applied to the standing auxiliary material 10 does not act on the excavation member 22 of the shaft construction member 20. For this reason, the thickness of the excavation member 22 can be reduced, and the manufacturing cost can be reduced.

Finally, as shown in FIG. 9 (d), the vertical shaft construction member 20 is lifted so that the locked core material 21 is positioned higher than the locking portion 13, and is lifted and detached from the auxiliary material 10. Let
Since the shaft construction member 20 is merely raised and locked to the locking portion 13 of the auxiliary material 10 by raising the core material 21, the shaft construction member 20 is lifted to a position higher than the standing auxiliary material 10, By simply shifting the shaft construction member 20 up and down, it can be easily detached in a vertical state.

[Other Examples]
In the case of the shaft construction member 20a in which only the upper end of the excavation member 22 is fixed to the core member 21 as shown in FIG. 3A, the excavation member 22 is engaged only with the upper engagement portion 13 as shown in FIG. Raise it up in the state of fishing down.
Further, in the case of the shaft construction member 20b in which only the lower end of the excavation member 22 is fixed to the core member 21 as shown in FIG. 3B, only in the lower locking portion 13 as shown in FIG. 10B. The erection is performed in the state of being locked and placed.
Since the same upright auxiliary material 10 can be used for a plurality of types of shaft construction members, and since the fixing operation such as welding is not performed only by being engaged with the engaging portion 13, the upright auxiliary material 10 is It can be diverted any number of times, and construction costs can be reduced.

The perspective view of the raising support material of this invention Perspective view of shaft construction member (1) Perspective view of shaft construction member (2) Explanatory drawing of use condition of shaft construction member Side view of usage state of the raising support material of the present invention Side view of usage state of the raising support material of the present invention The perspective view of the use condition of the raising support material of this invention Explanatory drawing of use state of raising support material of the present invention Explanatory drawing of the raising method of this invention Explanatory drawing of the raising method concerning the other Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Standing support material 11 Main body 12 Support part 13 Locking part 131 Locking recessed part 20 Shaft construction member 21 Core material 211 Web 212 Flange 22 Drilling member 23 Bolt 30 Planned penetration range 40 Steel material 50 Buffer material 60 Hanging wire

Claims (4)

It is an auxiliary material for raising a shaft construction member composed of a core material and a drilling member,
A rectangular main body longer than the shaft construction member,
Support portions provided at both ends in the width direction of the main body,
An auxiliary material for raising the shaft construction member, comprising: a locking portion extending from the support portion and capable of detachably locking the core material. In the standing support material of the shaft construction member according to claim 1,
The locking portion extends from both support portions so as to face each other,
Auxiliary material for raising shaft construction members. In the standing support material of the shaft construction member of Claim 1 or Claim 2,
The locking part is provided near the upper end of the standing auxiliary material and at the lower end,
Auxiliary material for raising shaft construction members. A method for raising a shaft construction member comprising a core material and a drilling member,
The raising support member having a locking portion capable of locking the core member of the shaft construction member is set in a horizontal posture, and the shaft construction member is locked in a horizontal posture,
In a state where the shaft construction member is locked, the standing auxiliary material is in a vertical posture,
The shaft construction member and the upright auxiliary material are shifted up and down, and the vertical construction member is separated from the upright auxiliary material,
A method for raising a shaft construction member.

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