JP2519545B2 - Construction method of artificial ground on the water - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for constructing a floating artificial ground for constructing a building on water such as a lake, a river, and a flood control pond.

“Conventional Technology” Conventionally, for example, in the case of artificial ground above water in lakes, rivers, flood control ponds, etc., as shown in FIG. A footing 3 is provided on each of the two pile heads, the lower end of each pedestal 4 is connected to each footing 3, and the beam 5 is connected between the upper ends of each pedestal 4.

[Problems to be Solved by the Invention] By the way, as in the above-mentioned conventional floating artificial ground, a foundation pile is placed in the bottom of the sea, a footing is provided at the pile head of the foundation pile, and a pedestal is connected to the footing. In such a construction method, it is necessary to temporarily cut off the required water area during the construction period. Therefore, there is a problem that the flow of water and the water storage function are obstructed, and the construction period becomes long.

"Means for Solving the Problem" The present invention is intended to solve the problems of the conventional method for constructing the above-mentioned water-based artificial ground, and the first gist thereof is to provide a required number of steel pipes. The piles are driven into the bottom of the sea with their upper ends protruding above the water surface, and consist of short pedestals and upper and lower seat plates whose center points match the center points of the upper and lower end surfaces of these short pedestals. Align the center point of the lower seat plate of each required number of joining units with the target casting center point of each steel pipe pile, and fix the lower seat plate of each joining unit to the upper end of each steel pipe pile. It is a method of constructing an artificial ground on the water in which beam members are connected between them.

The second gist of the present invention is that the required number of steel pipe piles are driven into the bottom of the water with their upper ends protruding from the water surface, and the intermediate short pedestal and this intermediate short pedestal are used. The lower end of the intermediate short pedestal in the required number of each joining unit consisting of the upper seat plate with the center point matched to the center point of the upper end surface of the column,
Fixed to the upper end of each steel pipe pile, fixed to the upper surface of the upper seat plate in each joint unit, the lower end of the upper short pedestal, with its center point aligned with the target casting center point of each steel pipe pile, It is a method of constructing an artificial ground on the water in which beam members are connected between the upper ends of the upper short pedestals.

[Operation] As in the first aspect of the present invention, the required number of steel pipe piles are driven into the bottom of the sea with their upper ends protruding from the water surface, and the short pedestals and the upper and lower sides of these short pedestals are placed. Align the center point of the lower seat plate in the required number of each joining unit consisting of the upper and lower seat plates with the center point matching the center point of the end face to the target driving center point of each steel pile and Since the lower seat plate is fixed to the upper end of each steel pipe pile and the beam material is connected between each joining unit to construct an artificial ground on the water, most of each steel pipe pile can also be used as a pedestal, and each steel pipe By aligning the axis of the short pedestal in each joint unit with the target placement center point of the pile, the placement error of each steel pipe pile can be absorbed, and therefore the beam material as factory-processed Can be easily connected between joining units,
It is possible to safely transmit the stress of the upper structure to each steel pipe pile through the lower seat plate of each joining unit, and it is advantageous in terms of construction period and cost, such as water flow and water storage function. It does not interfere.

Further, as in the second aspect of the present invention, the required number of steel pipe piles are driven into the water bottom ground with their upper ends projecting from the water surface, and the intermediate short studs and the intermediate short studs The lower end of the intermediate short pedestal in the required number of each joining unit consisting of the upper seat plate whose center point coincides with the center point of the upper end surface is fixed to the upper end of each steel pipe pile, and the upper seat of each joining unit is fixed. On the upper surface of the plate, the lower end of the upper short pedestal is fixed by matching the center points with the target driving center points of each steel pipe pile,
Since a beam material is connected between the upper ends of the upper short pedestals to construct an artificial ground on the water, each steel pipe pile and each joint unit can be used almost as a pedestal, and moreover, it can be used as the target placement center point of each steel pipe pile. , By aligning the axis of each upper short pedestal, it is possible to absorb the placement error of each steel pipe pile, and therefore the beam material that has been factory processed can be easily installed between the upper ends of each upper short pedestal. It can be connected, and the stress of the upper structure can be safely transmitted to each steel pipe pile through the upper seat plate and the intermediate short pedestal in each joint unit, as well as in terms of construction period and cost. It is relatively advantageous and does not impede the flow of water or the water storage function.

[Example] Next, an example of a method of constructing a water-based artificial ground according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a basic first embodiment of the method of the present invention. For example, a required number of steel pipe piles 11 are provided on a subsoil 1 in a required water area such as a lake, a river or a flood regulating pond. The steel pipe piles are installed by projecting the upper end of
Beam material 12 is connected between the upper ends of 11 to build an artificial ground on the water,
An arbitrary building 13 is built on this beam 12.

Now, an explanation will be given of the placement error of each of the steel pipe piles 11 here.

Generally, the driving error of the steel pipe piles 11 is about 50 to 100 mm, and the beam is provided between the upper ends of the steel pipe piles 11 whose upper ends are projected from the water surface, as in the basic first embodiment of the method of the present invention. In the above-ground artificial ground where the members 12 are connected to each other, as shown in FIG. 2, the cores of the steel pipe piles 11 do not coincide with each other. Of the steel pipe piles 11 and the beam members.
Since there is no method other than on-site welding as a means for connecting with 12, it is extremely disadvantageous in terms of construction period and cost.

Therefore, in the second embodiment of the method of the present invention, it is possible to absorb the driving error of each steel pipe pile 11 so that each beam member 12 that has been factory processed can be installed. As a connecting means for the erection of the twelve, for example, a method other than in-situ welding such as rivet connection and bolt connection can be adopted.

That is, in the second embodiment of the method of the present invention, as shown in FIGS. 3 to 5, the required number of steel pipe piles 11 is provided as in FIG.
Are placed with their upper ends protruding from the water surface, and from the short pedestal 14a and the upper and lower seat plates 14b, 14c whose center points match the center points of the upper and lower end surfaces of this short pedestal 14a. By matching the center point of the lower seat plate 14c in each required number of joining units 14 with the target casting center point of each steel pipe pile 11, each joining unit 14
The lower seat plate 14c is fixed to the upper end of each steel pipe pile 11 and a beam member is connected between the joint units 14 to construct a floating artificial ground.

Further, FIG. 6 shows a third embodiment of the method of the present invention for achieving the same purpose as the second embodiment, and in the same manner as FIG. 1, a required number of steel pipe piles 11 are provided. The upper end plate of the intermediate short pedestal 15a and the upper seat plate 15b whose center point is aligned with the center point of the upper end surface of the intermediate short pedestal 15a are required. Number of each splicing unit 15
The lower end of the intermediate short pedestal 15a in each is fixed to the upper end of each steel pipe pile 11, and the upper seat plate in each joint unit 15 is fixed.
On the upper surface of 15b, the lower end of the upper short pedestal 16 is fixed so that its center point matches the target casting center point of each steel pipe pile 11, and the beam 12 is placed between the upper ends of the upper short pedestals 16. It is connected to build an artificial ground on the water.

As shown in FIG. 7, ribs are provided between the intermediate short pedestal 15a and the lower surface of the upper seat plate 15b and between the upper pedestal 15b and the upper short pedestal 16 of each joint unit 15, respectively. By providing the plate 17, the plate thickness of the upper seat plate 15b can be reduced.

This means that by similarly providing a rib plate between the steel pipe pile 11 and the lower seat plate 14c of the joining unit 14 in the second embodiment (Fig. 3), the lower seat plate 14
The thickness of c can be reduced.

Further, when the placing error of each steel pipe pile 11 is too large to be absorbed by the joining unit 14 or the joining unit 15 as described above, as a back anchor installed as a fixed fixed point as shown in FIGS. 8 and 9. From steel pipe pile 11,
Via the chain block 18 and the float type hydraulic jack 19,
A reaction force is sequentially applied to each steel pipe pile 11 placed,
The driving error of each steel pipe pile 11 is forcibly corrected.

In addition, in FIG. 8 and FIG. 9, 20 is a wagon of a pile driving device.

"Effects of the Invention" As in the first aspect of the present invention, the required number of steel pipe piles are driven into the water bottom ground with their upper ends protruding from the water surface, and the short pedestal and this short pedestal Align the center points of the lower seat plates of the required number of joint units consisting of the upper and lower seat plates with the center points matching the center points of the upper and lower end faces of the steel pipe piles to the target casting center points, Since the lower seat plate in the joining unit is fixed to the upper end of each steel pipe pile and the beam material is connected between each joining unit to construct the floating artificial ground, most of each steel pipe pile can also be used as a pillar, respectively. Moreover, by aligning the axis of the short pedestal in each joining unit with the target casting center point of each steel pipe pile, the casting error of each steel pipe pile can be absorbed, and therefore the beam material as it is factory processed. Can be easily connected between each splicing unit, The stress of the structure can be safely transmitted to each steel pipe pile through the lower seat plate of each joining unit, and it is advantageous in terms of construction period and cost, and impedes water flow, water storage function, etc. There is nothing to do.

Further, as in the second aspect of the present invention, the required number of steel pipe piles are driven into the water bottom ground with their upper ends projecting from the water surface, and the intermediate short pillars and the intermediate short pillars are The lower end of the intermediate short pedestal in the required number of each joining unit consisting of the upper seat plate whose center point coincides with the center point of the upper end surface is fixed to the upper end of each steel pipe pile, and the upper seat of each joining unit is fixed. On the upper surface of the plate, the lower end of the upper short pedestal is fixed by matching the center points with the target driving center points of each steel pipe pile,
Since a beam material is connected between the upper ends of the upper short pedestals to construct an artificial ground on the water, each steel pipe pile and each joint unit can be used almost as a pedestal, and moreover, it can be used as the target placement center point of each steel pipe pile. , By aligning the axis of each upper short pedestal, it is possible to absorb the placement error of each steel pipe pile, and therefore the beam material that has been factory processed can be easily installed between the upper ends of each upper short pedestal. It can be connected, and the stress of the upper structure can be safely transmitted to each steel pipe pile through the upper seat plate and the intermediate short pedestal in each joint unit, and also in terms of construction period and cost. It is relatively advantageous and does not impede the flow of water or the water storage function.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing a basic first embodiment of the method of the present invention, FIG. 2 is a plan explanatory view showing a situation of a placement error of a steel pipe pile, and FIG. 3 is a second explanatory view of the method of the present invention. FIG. 4 is a sectional view taken along the line AA of FIG. 3, FIG. 5 is a sectional view taken along the line BB of FIG. 3, and FIG. FIG. 7 is a front view of a main part showing an embodiment, FIG. 7 is a front view of a main part showing a modification of the third embodiment, and FIG. 8 is a plan view showing a means for forcibly correcting the driving error of a steel pipe pile. FIG. 9 is a front explanatory view of the above, and FIG. 10 is a schematic explanatory view showing a conventional example. 1 ... water bottom ground, 11 ... steel pipe pile 12 ... beam material, 13 ... building 14 ... joint unit, 14a ... short pedestal 14b ... upper seat plate, 14c ... lower seat plate 15 ... joint unit, 15a ... intermediate part short leg Pillar 15b… Upper seat plate, 16… Upper short pedestal 17… Rib plate, 18… Chain block 19… Float type hydraulic jack 20… Pile driver wagon

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ryoji Takabe 2-3-2 Uchisaiwaicho, Chiyoda-ku, Tokyo Kawasaki Steel Co., Ltd. Tokyo headquarters (72) Inventor Kazuyoshi Fujisawa 2-3-2 Uchisaiwaicho, Chiyoda-ku, Tokyo No. Kawasaki Steel Co., Ltd. Tokyo head office (56) Reference JP-A-50-30334 (JP, A) JP-A-60-80617 (JP, A)

Claims (2)

(57) [Claims] 1. A required number of steel pipe piles are mounted on a subseabed ground with their upper ends projecting above the water surface, and the center points of the short pedestals are aligned with the center points of the upper and lower end surfaces of the short pedestals. Match the center point of the lower seat plate in the required number of joint units consisting of the upper and lower seat plates to the target driving center point of each steel pipe pile,
A method of constructing a floating artificial ground, characterized in that a lower seat plate in each joining unit is fixed to an upper end of each steel pipe pile, and a beam member is connected between the joining units. 2. A required number of steel pipe piles are driven into the water bottom ground with their upper ends projecting above the water surface to form intermediate short pedestals.
The lower end of the intermediate short pedestal in each required number of joining units consisting of the upper seat plate whose center point coincides with the central point of the upper end surface of this intermediate short pedestal is fixed to the upper end of each steel pipe pile. , On the upper surface of the upper seat plate in each joining unit, fix the lower end of the upper short pedestal with its center point aligned with the target casting center point of each steel pile, and between the upper ends of each upper short pedestal. A method for constructing an artificial surface on the water, characterized by connecting beams.