JPH0327683B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a method for constructing a working floor by spanning a structural girder over the head of an existing pile and erecting a lining board on the girder. , relates to a pile driving method in which piles are driven sequentially forward.

[Prior Art] Such a pile driving method has been conventionally used, for example, for driving foundation piles for unloading piers.

By the way, the device that guides the piles during pile driving, that is, the leader, is usually fixed to the work floor, so each time the work floor is advanced up to the existing pile after driving the piles, it must be removed and placed on the work floor again. It had to be fixed in place, which caused problems in terms of speeding up construction and making it safer.

For example, Japanese Patent Publication No. 53-25401 discloses a method of driving piles by sequentially extending a template that guides the piles. However, in this known technique, since a cylindrical portion is provided on the template to guide the pile, only relatively thin piles can be applied.For this reason, a large number of piles must be driven for strength, and a large workbench cannot be used. It was not suitable for me.

Furthermore, in the construction method of Japanese Patent Publication No. 54-26803, a guide device for driving piles is attached to the existing piles and the piles are driven one after another, so it is troublesome to attach and detach the guide device.

[Problems to be Solved] Therefore, an object of the present invention is to provide a pile driving method that allows relatively large diameter piles to be driven quickly and safely, and thereby allows for the prompt construction of a loading pier, etc. .

[Means for Solving the Problems] According to the present invention, a structural girder is spanned over the head of an existing pile, a lining board is erected on the girder to construct a working floor, and the work floor is sequentially advanced. In the pile driving method of driving piles, it can be fixed on the girder with a fixing device,
A base that is movable along the girder material, a beam member that is located below the base and protrudes from the girder material via a connecting member to the base, and a scaffold that is movable along the beam member. and a guide device consisting of a guide stand that can be extended from the scaffolding, and the guide device is advanced by being guided by a girder material that spans the existing pile,
Fix the pile to the girder with the fixing means, drive the pile by holding the pile with the guide stand of the guide device, release the guide stand of the pile,
A working floor is formed by extending girders up to the driven piles, then the fixing device is released and the guide device is moved, and the same operation is performed thereafter to drive the piles one after another.

[Description of Effects of the Invention] Therefore, the guide device can be moved forward along the girder and fixed by releasing the fastening device, so that the forward movement and fixation can be easily performed.
Since the guide device is designed to hold the piles at a position lower than the work floor, the piles do not get in the way when moving forward, and the guide table is movable, allowing it to hold the piles to be driven in a suitable manner. is possible,
Suitable for relatively large diameter piles and can be easily positioned.

Therefore, it can greatly contribute to speeding up and safety of work.

[Examples] Examples of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, the heads of the existing piles 1, 1 that have been driven are trimmed, and girder members (H-shaped steel) 2, 2' for the head structure are placed over them. Next, the lining board 3 is placed over the girder members 2, 2', leaving the part where the pile guide device is installed, which is indicated as B, and the work floor A is constructed.
Build.

The guide device B has a thickness equal to the thickness of the lining plate 3 installed on the girder 2, and is fixed on the girder 2 by fixing devices C, C, forming a part of the work floor A. There is. The fixing devices C, C may be any known fixing devices, and in the illustrated example, by rotating the threaded rod, the nut screwed into the threaded rod moves and engages with the flange of the beam member 2. It is supposed to be fixed. This guide device B includes a base 4 that is movable in the longitudinal direction (arrow X, Y direction) of the work floor A along the girder 2, and a base 4 that is connected to the base 4 via connecting members 5, 5. A pair of beam members 6, 6 located below and protruding toward the X direction, scaffolding platforms 7a, 7b movable along the beam members 6, 6, and the scaffolding platform 7.
a, 7b, and are configured with guide stands 8a, 8b that can be folded (shown in the upper part of FIG. 1) and extended (shown in the lower part of FIG. 1).
A and 8b each have a semicircular recess 9 that holds the circumference of the pile 1' to be driven in an overhanging state.
a, 9b are formed.

Next, the pile driving procedure will be explained.

After the previous work is completed, fix the base 4 using fixing devices C and C.
is released from the girder 2, the guide device B is lifted by a crane (not shown), the base 4 is guided by the girder 2 that spans the existing piles 1, 1, the guide device B is advanced, and the girder 2 and operate the fixing devices C and C to fix it. At this time, the center lines of the recesses 9a and 9b for guiding the next pile 1' to be driven are aligned, and the base 4 is positioned on the girder 2. Next, the pins of the pin portion 10 are inserted according to the distance between the piles to fix the scaffolding platforms 7a and 7b, and the position of the distance between the piles is adjusted.

Next, the new pile 1' to be driven is lifted up by a crane and the pile 1' is erected.
b, and move the scaffolding platform 7b to the base 4 side (arrow Y
direction). Then, position the pile by placing the pile 1' from the scaffolding platform 7b into the semicircular recess 9a of the other scaffolding platform 7a, and move the scaffolding platform 7b along the arrow
direction and extend the guide platform 8b,
Hold the pile 1' in cooperation with a. In this state, the pile 1' is lowered to drive the pile. After driving one pile, use scaffolding platforms 7a, 7b and guide platforms 8a, 8b to erect the next pile, weld the lower pile and upper pile, and perform an X-ray inspection of the welded part. . Once the pile driving is completed, the scaffolding and guide tables are similarly used to perform head processing work such as aligning the pile heads, welding work for connecting the pile heads with the girder material 2a, etc.

Next, fold up the guide tables 8a and 8b and attach the pile 1'.
The guide device B is moved forward along the girder 2a and installed in the same manner as described above. Thereafter, similar operations are performed to drive piles and move forward, for example, to build a loading pier.

Although round piles are used in the examples, the present invention can be applied to piles with other cross-sectional shapes such as H-shaped piles, and can also be applied to pile driving not only for the construction of loading docks but also for other purposes. The invention can be practiced.

[Effects of the Invention] As described above, according to the present invention, the guide device is moved forward and fixed along the girder material spanning the existing pile,
Since the next pile to be driven is held by the guide stand, even if the guide stand of the guide device is below the girder, the existing pile will not get in the way of its advancement, and the pile will be held at a relatively low position. Easy to place and position. Therefore, the work of driving relatively large diameter piles can be done quickly and is extremely safe.

[Brief explanation of the drawing]

The drawings show a pile guiding device used to carry out the present invention, with FIG. 1 being a plan view and FIG. 2 being a side view. A...Working floor, B...Pile guide device, C...Fixing device, 1...Existing pile, 1'...Pile to be newly driven,
2, 2', 2a... Girder material, 3... Lining board, 4...
Base, 6... Beam member, 7a, 7b... Scaffolding stand, 8
a, 8b...Guide table, 9a, 9b...Semicircular recess.

Claims (1)

[Claims] 1 In the pile driving method, in which a structural girder is stretched over the head of an existing pile, a lining plate is erected on top of the girder, a working floor is built, and the piles are driven in sequence, the girder is a base that can be fixed to the top by a fixing device and is movable along the girder; a beam member that is located below the base and protrudes from the girder through a connecting member to the base; A guide device consisting of a scaffold that is movable along the beam member and a guide stand that can be extended from the scaffold is prepared, and the guide device is advanced by being guided by the girder material that spans the existing pile, and the fixing means Fix the pile to the girder material with A pile driving method characterized by releasing the device, moving the guide device, and performing the same operation thereafter to drive piles in sequence.