JPH0645936B2 - Underwater sheet pile driving method - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention is particularly suitable for driving a steel sheet pile with a predetermined depth in water slightly above the bottom surface of the water as a top end position for stopping, particularly when driving a steel sheet pile. The present invention relates to an underwater sheet pile driving method that is effectively used when the sheet pile length to be driven is shorter than the water depth.

[Prior art]

Conventionally, when a steel sheet pile is driven into the bottom of the water and it is stopped when the top of the top of the water is a little out of the bottom of the water, and when the sheet pile is shorter than the water depth, the submersible soil dive into the water while It was necessary to match the section of the existing sheet pile that was driven in with the section of the sheet pile to be driven, and to install the underwater conducting material consisting of a frame material so that each sheet pile to be driven was arranged in a straight line. .

However, in the above-mentioned case, there is a problem in that the construction for combining the sections of each sheet pile is all performed underwater, and furthermore, the construction is a diver construction, which is extremely dangerous.

In addition, because of the above-mentioned underwater construction, it is impossible to control the normal and inclination of the sheet pile. Furthermore, when driving the sheet pile, the vibro hammer cannot be put into the water, so the sheet pile head. I will drive into the department via Yatco,
The diver also supported the Yatco on the head of the sheet pile, and there was a problem that the work was dangerous and inefficient.

[Object of the Invention]

The present invention has been made to solve the above-mentioned conventional problems, and even if the sheet pile that is driven to a predetermined depth in the water above the water bottom is shorter than the predetermined water depth, the work by the diver construction is greatly reduced. It is an object of the present invention to provide an underwater sheet pile driving method capable of reducing and performing safe and efficient work.

[Outline of Invention]

In order to achieve the above-mentioned object, the sheet pile driving method of the present invention, the top end of the guide sheet pile that matches the section of the existing sheet pile that has been previously driven to a predetermined depth in the water from the bottom of the water, quay superstructure, etc. After welding to the conducting material on the water supported by the guide sheet pile, the guide sheet pile and one or two driving sheet piles and the sections of the sheet piles to be left are assembled so that the sheet piles for the driving sheet pile are assembled. With the yatco that holds the top end and the sections for the guide sheet pile and the remaining sheet pile to be combined, only the sheet pile for driving is driven to the specified depth via the yatco with a vibro hammer etc. A new sheet pile is fitted to the section, and the next yatco that holds the top of the remaining sheet pile and the previous yatco and the new sheet pile section are assembled together, and the next yatco is inserted. Characterized by repeating the process of driving the sheet pile supported by the next Yatco as a sheet pile for driving with a vibrohammer while leaving the remaining sheet pile while alternately using the previous Yatco and the next Yatco. There is.

By repeating the above steps, when the sheet piles are continuously driven, the sheet piles on the water surface allow the sheet piles to be efficiently and accurately installed. That is, the essential configuration of the present invention is to drive a sheet pile for driving through a yatco, a sheet pile for next driving is driven through another yatco along the yatco, and this is sequentially repeated in water. It is in the sheet pile driving method.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.
-FIG. 1 to FIG. 1-J are explanatory side views showing a series of steps in one embodiment to which the underwater sheet pile driving method of the present invention is applied, and FIG. 2 is a yatco shown in FIG. 1-B. FIG. 3 is an enlarged plan sectional view taken along line AA of FIG. 2, FIG. 4 is an enlarged plan sectional view taken along line BB of FIG. 2, and FIG. FIG. 6 is an enlarged plan view of the conductive material on the water used in FIG. 6, and FIG. 6 is a side sectional view of FIG.

First, in FIG. 1-A, the work of combining the section of the existing sheet pile 2 that has been previously driven to a predetermined depth H in the water slightly higher than the water bottom surface 1 and the section at the lower end of the guide sheet pile 3 is dived. Performed by a mentor

Here, the sheet pile 4 to be subsequently driven is shorter than a predetermined depth H in water, the guide sheet pile 3 is installed in the existing sheet pile 2, and its top end is shown in FIGS. As shown in FIG. 6, the welding material is added to the length of the conductive material 5 provided above the conductive material 5 by welding W.

Next, the top end of the guide sheet pile 3 is attached by welding to the end portion between the two guide members 6 provided on the water-based conducting member 5 in FIG.

As shown in FIG. 6, the guide member 5 is composed of a support member 9 projecting above the water surface via a support member 8 on the quay superstructure 7 and the guide member 6 described above. A normal line, and B is a sheet pile normal, and the guide sheet pile 3 and the sheet pile 4 for subsequent driving are aligned in a straight line along the sheet pile normal line B at the center of the two guide members 6. It will be located as shown in Fig. 5.

Next, in the section of this guide sheet pile 3, 2
The sheet pile 4 and the remaining pile sheet 4A sections are combined together and fixed to the guide member 5. However, in this embodiment, since there are two sheet piles 4 for driving, these two sheet piles are used. Four
Shall be welded.

Here, the remaining sheet pile 4A of the third sheet is suspended by a crane via the wire 10.

Next, in FIG. 1-B, the top ends of the two sheet piles 4 for driving are held by the hydraulic chuck 12 of the yatco 11A shown in FIG. 2, FIG. 3, and FIG. The sheet pile 4 and the yatco 11A, the guide sheet pile 3 and the remaining sheet pile 4A.
1-C and 1-C with each section of FIG.
As shown in FIG. D, only the hammering sheet pile 4 is driven to a predetermined depth indicated by H by the vibro hammer 13 through the cots 11A.

Next, leaving the above yatco 11A as it is, the remaining sheet pile 4A is newly welded to the sheet pile 4B as shown in FIG. 1-E, and the sections are fixed to the conductor 5 in a built-in state, The last sheet pile 4C is hung with a crane via the wire 10.

Further, in FIG. 1-F, the two sheet piles 4A and 4B are used as a driving sheet pile, and the next yatco 11B and the driving sheet piles 4A and 4B that hold the top end of the sheet pile 4B and the previous yatko sheet 11A. And after combining each section of the new sheet pile 4C,
As shown in FIG. 1-G, the vibrating hammer 13 is used to insert the sheet piles 4A and 4B for hammering through the yatco 11B to a predetermined depth H.
Drive up to.

Next, as shown in FIG. 1-H, the first yatco 11A is pulled out, the next yatco 11B is left as it is, and two new sheet piles 4D and 4E are installed on the remaining sheet pile 4C, and the previous yatco 11C is installed. It is confirmed whether or not 11A does not go down in the process of FIG. 1-G, and if it is good, the hydraulic chuck 12 is opened and the guide sheet pile 3 is driven in and cut by the diver at the upper welding W portion.

Further, as shown in FIGS. 1-I and 1-J, the sheet piles 4C and 4D for driving are held by the yatco 11A, and the sheet piles 4C and 4D for driving and the sheet pile 4E left behind.
And the sections with Yatco 11B are combined and driven by the upper vibro hammer 13.

Yatco 1 before the steps of FIGS. 1-E to 1-J
By continuously using 1A and the next yatco 11B alternately, the continuous sheet pile is driven.

The yatco 11A, 11B is a flange member in which a reinforcing plate 15 is attached to two sheet pile members 20 as shown in FIGS. 2, 3 and 4 and a hydraulic chuck 12 is firmly attached to the lower portion by a reinforcing member 16. It is attached to 17.

[Effects of the Invention] The sheet pile driving method of the present invention is, when the steel sheet pile is driven with the predetermined depth in the water slightly above the water bottom as the top end position for stopping, the sheet pile length to be driven is greater than the water depth. Is short,
Since the section of each sheet pile and the section of Yatco are built by the conducting material provided on the water, the work will be performed efficiently and accurately on the water, and the water between the existing sheet pile and the guide sheet pile will be used. Only section alignment work near the bottom and cutting work at a predetermined depth after hitting one sheet of guide sheet pile are diver construction and all others are above water construction, so the work safety can be improved. There is.

[Brief description of drawings]

FIGS. 1-A to 1-J are explanatory side views showing a series of steps in one embodiment to which the underwater sheet pile driving method of the present invention is applied, and FIG. 2 is FIG. 1-A. FIG. 3 is an enlarged side sectional view of the YATCO shown in FIG. 3, FIG. 3 is an enlarged plan sectional view taken along the line AA of FIG. 2, and FIG. 4 is an enlarged plan sectional view taken along the line BB of FIG.
The figure is an enlarged plan view of the conductive material on the water used in FIG. 1-A.
FIG. 6 is a side sectional view of FIG. 1 ... Water bottom surface, 2 ... Existing sheet pile, 3 ... Guide sheet pile, 4, 4
A, 4B, 4C, 4D, 4E ... sheet pile, 5 ... conductive material, 11
A, 11B ... Yatco, 13 ... Vibro hammer, H ...
Predetermined depth.

Claims (1)

[Claims] 1. The top end of a guide sheet pile fitted to a section of an existing sheet pile preliminarily driven to a predetermined depth above the bottom of the water is attached to a conducting material on the water supported from a quay superstructure or the like. After that, the guide sheet pile, one or more driving sheet piles, and the remaining sheet pile sections are assembled together, and a yatco that holds the top end of the sheet pile for driving, the guide sheet pile, and In the state where each section of the sheet pile to be left is combined, only the sheet pile for driving is driven to a predetermined depth with a vibro hammer etc. through the above-mentioned Yatco, a sheet pile is newly fitted to the section of the sheet pile left, and the above is left. With the next yatco holding the top of the sheet pile, the previous yatco, and each section of the new sheet pile, in the installed state, while leaving the new sheet pile through the next yatco, The lifting been vibro-hammer over implanted in such process the sheet piles as sheet pile for nailing, sheet pile driving tool construction method in water repeated while using the previous forceps and next the forceps alternately.