JPH0654009B2 - Movable beam device - Google Patents

Description

[Detailed Description of the Invention] << Industrial field of application >> The present invention relates to a crossbeam used for root cutting and earth retaining work.

《Prior art》 In general, the conventional truss-type earth retaining method excavates to a certain depth, then raises the mountain retaining wall to the first step, and while supporting it with the cutting beam, sequentially digs down to the planned deepest portion and subordinates. The second and third steps are raised, and the excavation is promoted while supporting the mountain retaining wall with a cutting beam or the like.

After that, angry from the deepest part, hit concrete for the inner wall to the bottom of the cutting beam, and when this reaches the required strength, remove the cutting beam etc. of that part and splice the concrete directly above to develop strength. If you do, remove the beams and other parts of this part. The underground work was completed by repeating this work in sequence upward.

The beam used in such a construction method uses an H-shaped steel to press the upholstery, so a jack that expands and contracts is provided in the middle of the beam, and by extending this jack, the H-shaped steel moves toward both ends. It stretched and the abdomen urged against the retaining wall.

<< Problems to be solved by the invention >> The cutting beam cannot be removed until the concrete cast for the inner wall reaches the required strength, and when the upper inner wall is angry, the cutting beam becomes angry. However, it is necessary to remove the crossbeams once because it will be a hindrance, and it is undeniable that the construction period will become longer due to the complexity of different industries.

Due to safety issues, in general, the excavation work and underground construction work are suspended before the removal of beams and the like, and this has had a large impact on the construction period.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a movable cutting beam device that can quickly and easily carry out work for removing cutting beams and the like.

<< Means for Solving the Problems >> In order to achieve the above object, the movable beam cutting apparatus of the present invention includes a column having a vertically movable table and a roller on the table via rollers such as wheels and wheels. It is composed of beams and the like which are supported so as to be able to extend and contract in the axial direction.

<< Operation >> Since the cutting beam can be expanded and contracted in the axial direction on the table through the rolling wheels, and the table can be moved up and down, the cutting beam can be moved in the vertical direction and the axial direction.

Therefore, the earth retaining wall can be pressed or urged, and the erection depth of the girder can be easily changed.

«Examples» Hereinafter, preferred examples of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an outline of an intermediate part of the movable beam strut apparatus. This device is provided with several beams in the height direction depending on the depth of excavation in the soil.

In the configuration of the embodiment, the four corners of the substantially square table 1 are supported by the columns 2, and the roller 3 is placed on the table 1.
A cross beam 5 having a telescopic jack 4 is provided midway through the.

In order to move the table 1 up and down, pulleys may be arranged at the upper and lower ends of the column 2, a wire rope may be hung around this, and this wire rope may be hoisted and lowered by a motor winch installed on the ground, or the column A rack gear may be attached to the table, and a pinion gear that interlocks with the output shaft of a motor provided on the table may be engaged with the rack gear, and the table 1 may be vertically moved by the motor.

The roller 3 is rotatably supported on the table 1, and a guide rib is formed on the outer peripheral surface thereof. The rib 5 guides the beam 5 in the axial direction and is supported so as to be movable in the axial direction.

That is, by supporting the cutting beam 5 with the roller 3,
The cross beam 5 is set free in the axial direction. Therefore, when the expansion / contraction jack 4 such as a giraffe jack is expanded / contracted, the girder 5 can freely expand / contract.

Two cut beams 5 are installed in parallel on the table 1, and an agitating member 6 is provided between the end faces in the axial direction.

As shown in FIG. 2, when the jack 4 is extended with respect to the earth retaining wall 7, the girder 5 extends so as to slide on the roller 3 as it is, and the abdomen 6 presses the earth retaining wall 7 and the earth pressure. To counter. The length of the girder 5 is adjusted by the stroke of the jack 4.

<< Effects >> As described in detail above, according to the movable truss device of the present invention, since it is a truss that can be expanded and contracted in the axial direction, it is easy to press or release such as waving, and However, since the table supporting the beams and the like is provided on the column so that it can move up and down, the work of clearing the beams and the like can be performed simply and quickly by the expansion and contraction control of the beams and the up and down movement of the table. . Therefore, it can be used as a cutting beam when digging into the soil, and as a reshuffling beam when constructing an inner wall, which is effective in shortening the construction period and reducing labor.

Further, by continuously operating the vertical movement of the table, the beam and the like can be finely adjusted at the optimum depth position, so that a high-quality underground structure can be constructed.

Further, when it is not easy to replace the cut beams, it is convenient to install floor concrete or steel beams. Although there was a disadvantage that the member cross-section and the like became large, the present invention has the effect of being able to eliminate this point as well, since fine and continuous movement is possible in the present invention.

[Brief description of drawings]

FIG. 1 is a partial perspective view for explaining a cutting beam device according to the present invention, and FIG. 2 is a side view for showing the movement of the cutting beam. 1 ... Table, 2 ... Posts 3 ... Rollers, 4 ... Expansion jacks 5 ... Girders, 6 ... Riseing 7 ... Soil retaining walls

Claims (1)

[Claims] 1. A column comprising a vertically movable table, a cutting beam supported on the table via rollers such as rollers and wheels so as to be capable of expanding and contracting in the axial direction, and a plenum. Characteristic movable beam device.