JPH05321223A - Provisionally installed landing bridge and its method of construction - Google Patents

Abstract

PURPOSE:To construct a provisional landing bridge by simple works which ensures a little noise and vibration. CONSTITUTION:Each base 1 where props 2 are coupled by a lower girder 3, is fabricated in advance at a factory. An adjusting means for discontinuity of the ground is fixed to the bottom of each prop 2 of this base 1, and a plurality of such bases 1 are installed at the site for construction of the works, and the lower girders 3 of different bases 1 are coupled together by upper girders 9, and thereover a covering plate 10 is laid. Because the adjusting means adjusts the discontinuity of the ground at the time the bases 1 are installed, stable operations can be done without requiring to drive the props into the ground. Therefore, execution of works can be made with low noise and less generation of vibrations and also the works are simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism and a construction method for a temporary jetty installed in a river, the sea or the like.

[0002]

2. Description of the Related Art Temporary piers are temporarily constructed for the purpose of approaching work machines, transporting materials, or securing a work place when constructing structures such as rivers, seas, and lakes. FIG. 12 shows a conventional structure of this temporary pier. A horizontal connecting member 91 for connecting the pillars 90 standing upright on the bottom of the water by a method such as vibration or driving, and the pillars 90 to each other, and between the horizontal connecting members 91. And a brace member 92 that is stretched over the. Support 9
A lower girder material 93 such as H steel is bridged between the upper end portions of 0, and an upper girder material 94 orthogonal to the same girder material 93 is attached to the upper part of the lower girder material 93. A lining plate 95 is laid. The construction of such a temporary pier is supported by the support 90
Is struck into the ground at the bottom of the water by vibration, setting, etc., the columns 90 are connected by the horizontal connecting members 91, then fixed by the brace members 92, and the lower girder material 93 and the upper girder material 94 are attached in this order. This is done by laying a lining plate 95 on top.

[0003]

In the conventional temporary pier, noise and vibration are generated at the time of construction, and the horizontal connecting member 91,
It takes a lot of time and labor to connect the respective members such as the brace member 92 and the lower girder member 93. In addition, during the construction, unevenness of the top height of the columns 90 and unevenness in the span direction and the girder direction are likely to occur, and work for correcting them is also required. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a temporary pier and a construction method thereof, which is easy to construct, and which is less likely to cause irregularities and can be assembled and assembled in a short time.

[0004]

In order to achieve the above object, in the temporary pier of the present invention, a plurality of bases having girder members fixed to the upper ends of columns are installed on the ground, and the girder members are covered on the upper surface. A work plate is provided, and a screw is attached to the lower end of the column. Further, in the present invention, it is possible to adopt a configuration including a jetting unit that jets jet water from the lower end of the support column toward the ground. The construction method of the temporary pier of the present invention is
After hoisting a plurality of bases with a crane etc. and arranging them in a predetermined place in sequence, install them while maintaining a predetermined interval while adjusting the ground with screws at the bottom of the support or jetting jet water,
After that, an upper girder material is bridged between the lower girder materials of the base, and then a lining plate is laid on the upper girder material.

[0005]

[Operation] With the above configuration, by installing the base on the construction site, the ground is scraped by the rotation of the screw configured at the lower end of the support, and the ground is adjusted to the ground at the bottom of the water to adjust the unevenness of the ground. You can Because of this, vibration,
It can be installed easily and quickly without performing work such as casting. Further, the jetting means jets the jet water to adjust the base.

[0006]

1 to 3 show a first embodiment of a temporary pier according to the present invention, in which a pair of left and right support columns 2 in which steel materials are assembled in a triangular shape and a straddle-like structure are attached to the upper ends of the support columns 2. The base 1 is composed of the lower girder material 3 made of H steel. In FIG. 2, reference numeral 4 is a connecting member that connects the lower portions of the columns 2. A support plate 5 is attached to the lower end of the column 2, and a screw 6 as an adjusting means is rotatably attached to the support plate 5. The screw 6 has its shaft 6
It is attached to the bracket 7 of the support plate 5 so that a is in the horizontal direction, so that it can rotate in the horizontal plane. Such a base 1 is preassembled in a factory and then transported to a construction site.

Next, a method of constructing the temporary jetty of this embodiment will be described. After transporting the base 1 to the construction site, lift it with a crane or the like and install it at a predetermined place. At the time of this installation, the screw 6 is rotated by a driving device to scrape the ground surface, and the weight of the base 1 digs into the ground at the bottom of the water to adjust the ground. For this reason, a stable installation state is achieved, and it is not necessary to drive the support pillar 2 into the ground. After installing a plurality of bases 1 at predetermined intervals in this way, the upper girder material 9 is bridged between the lower girder materials 3 at the upper ends of the adjacent bases 1.
After that, by laying the lining plate 10 on the upper girder material 9, the state shown in FIG. 3 is obtained, and the construction is completed. Therefore, it is not necessary to drive the pillars that cause noise and vibration, so that the construction can be performed in a low noise environment. Moreover, since the construction is completed only by installing the base 1 and attaching the upper girder material 9 and the lining plate 10, the work is simplified and can be easily constructed in a short period of time. Moreover, when the base 1 is installed, unevenness in the height direction is unlikely to occur because the ground 6 is adjusted by the screw 6, and furthermore, the position adjustment of the base 1 is easy, so that the girder direction and the span direction can be adjusted. Accurate construction is possible without causing misalignment.

4 and 5 show other examples of the base 1, respectively. In FIG. 4, the support columns 2 are assembled in a gate shape, and in FIG. 5, the support columns 2 assembled in a gate shape are connected by a brace member 11. ing. Further, in FIG. 5, the upper girder member 9 is attached in the direction orthogonal to the lower girder member 3 to form the base 1. Even in each of these bases, the provision of the screw 6 at the lower end of the support column 2 allows the adjustment of the groundwork, so that the temporary pier can be constructed easily and reliably.

6 and 7 show a second embodiment of the temporary jetty of the present invention, in which a plurality of injection holes 12 are formed in the longitudinal direction. Further, a water pipe (not shown) connected to the injection hole 12
Is provided, and this water pipe is connected to an injection source such as a pump (both not shown) via a hose. The injection hole 12, the water pipe, and the injection source constitute an injection unit that injects jet water. This injection means
As described above, the base 1 is installed on the site, and the jet water 13 is jetted from the jet holes 12 into the ground. Since the jet water 13 can surely adjust the unevenness of the base, there is an advantage that a stable installation can be performed.

FIG. 8 shows a third embodiment of the temporary pier of the present invention, which has a triangular upper member 21 and an upper member 21.
The column 2 is composed of the lower member 22 into which the lower part of the above is slidably inserted, and the lower girder member 3 is attached to the upper end of the upper member 21. As a result, the height of the column 2 can be adjusted. Also, the left and right lower members 2
If 2 is configured to be able to expand and contract independently, horizontal adjustment on each sloping ground of each base can be easily performed. 9 and 1
Reference numeral 0 indicates another example of this height adjusting mechanism, in which a vertical member 23 is vertically provided on the upper part of the support column 2, a slider 24 is slidably inserted into the vertical member 23, and a slider 24 is attached to the upper end portion of the slider 24. The beam member 3 is attached. The vertical movement of the upper member 21 and the slider 24 may be performed by operating a fluid pressure cylinder provided inside each, or may be lifted by a crane or the like to adjust the height, and after adjustment, these are bolted, Secure with pins. By making the strut 2 expandable and contractable in this manner, the heights of the bases are made uniform even when the bases are installed on an inclined water bottom, and the height and level of the lining plate can be easily adjusted. You can

FIG. 11 shows another example in which the height is adjusted on the girder side. An adjusting girder member 25 is provided on the upper part of the lower girder member 3 bridged between the columns 2. This adjustment girder material 25 is a jack 2
Both ends of the adjustment girder member 3 are supported by the lower girder member 3 via 6, and the height of the adjusting girder member 25 is adjusted by driving the jacks 26 to extend and contract. Therefore, when the base 1 is installed, even if the heights are not uniform, the adjustment girder member 25
It can be easily adjusted by adjusting the height of the pier, and a temporary pier with a uniform height can be constructed.

[0012]

According to the present invention, since the ground is adjusted by a screw or jet injection by installing a base on which a girder material and columns are assembled, a temporary pier which can be stably installed by a simple operation. Therefore, it is possible to suppress the generation of noise and vibration even during the construction.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a first embodiment of the present invention.

FIG. 2 is a side view of the base of the first embodiment.

FIG. 3 is a side view showing a construction state of the first embodiment.

FIG. 4 is a side view of another example of the base.

FIG. 5 is a side view of another example of the base.

FIG. 6 is a partially cutaway side view of the second embodiment.

FIG. 7 is a partially cutaway side view of the second embodiment.

FIG. 8 is a partially cutaway side view of the third embodiment.

FIG. 9 is a partially cutaway side view of another example of the height adjusting mechanism.

FIG. 10 is a partially cutaway front view of another example of the height adjusting mechanism.

FIG. 11 is an explanatory view of another example of the height adjusting mechanism.

FIG. 12 is a perspective view of a conventional temporary pier.

[Explanation of symbols]

 1 Base 2 Support 3 Lower girder 6 Screw 9 Lower girder 10 Lining plate 13 Jet water

Claims (4)

[Claims] 1. A plurality of bases having girder members fixed to the upper ends of the columns are installed on the ground, a lining plate is provided on the upper surface of the girders, and ground unevenness adjusting means is provided at the lower ends of the columns. Temporary pier with attached. 2. The temporary pier according to claim 1, wherein the ground unevenness adjusting means is a screw that bites into the ground while rotating. 3. The temporary pier according to claim 1, wherein the ground unevenness adjusting means is a jetting means for jetting jet water toward the ground. 4. A plurality of bases are hoisted by a crane or the like and sequentially arranged at predetermined places, and then the grounds are adjusted by adjusting means at the lower ends of the columns while being installed at predetermined intervals. A method for constructing a temporary pier, in which an upper girder material is bridged between girder materials and then a lining plate is laid on the upper girder material.