JPH02296915A - Construction method for steel pipe pile head connection part - Google Patents

Abstract

PURPOSE:To easily and positively construct a steel pipe pile head connection part by loading positioning fitting members at lower side of hollow frames for constructing the pile head connection part to be mounted on rows of constructed steel pipe piles so that they can be moved, and fitting the fitting members into the upper ends of the respective steel pipe piles, thereafter locking the fitting members. CONSTITUTION:Plural positioning fitting members 17, 17 prearranged to be fitted into the upper ends of respective steel pipe piles 3... respectively are loaded at lower side of hollow frames 16, 16 for constructing a pile head connection part to be mounted on a constructed row 2 of steel pipe piles so that they can moved in the direction of length of the row 1 of the steel pipe piles. The respective positioning fitting members 17, 17 are fitted into the upper ends of the respective steel pipe plies 3..., and the fitting members 17, 17 are locked to the frames 16, 16 in that condition. Successively, concrete is placed into the frames 16, 16, or the frames remain hollow so as to obtain the pile head connection part. Thus, the need for concrete placing forms for constructing the pile head connection part is eliminated, and the pile head connection part can be positively and firmly connected to the row of piles without being affected by irregular intervals of the steel pipe piles 3.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for constructing a head joint in a row of steel pipe pile columns used for earth retaining walls, seawalls, etc.

(Conventional technology) At the upper end of a row of steel pipe pile columns used for earth retaining walls and bank protection, etc.
A continuous head joint is constructed in the direction of the column row, but conventionally, a concrete formwork for constructing the head joint is assembled on site at the top of the steel pipe pile column row, and reinforcement is placed and concrete is poured within the formwork. After curing the concrete, the formwork was dismantled and removed to construct the head joint.

(Problems to be Solved by the Invention) The conventional head joint construction method as described above has the drawback that it requires a great deal of effort and time to assemble and dismantle the concrete formwork on site.

(Means for Solving the Problems) In order to solve the conventional problems as described above, the present invention has the following features:
A plurality of positioning fitting members that are individually fitted into the upper ends of the steel pipe piles in the steel pipe pile column are installed on the lower side of the hollow frame for constructing the head connection part that rests on the constructed steel pipe pile column. It is mounted so as to be movable in the length direction, and each positioning fitting member is fitted into the upper ends of the plurality of steel pipe piles of the steel pipe pile column row,
Construction of the upper part of the row of steel pipe pile columns 1, characterized in that each positioning fitting member is fixed to the frame, and concrete is poured into the frame, or the frame is left hollow and used as a head connecting part. This project proposes a construction method.

(Example) An example of the present invention will be described below based on the attached illustrative drawings.

In FIGS. 1 and 2, 1 is a row of steel pipe pile columns for revetment, and 2 is a head connection part constructed at the upper end of the steel pipe pile column row L according to the construction method of the present invention.

As shown in FIG. 3, the steel pipe pile column row 1 is a steel pipe pile 3 that does not have a connecting member protruding along the axial direction on the outer peripheral surface.
are press-fitted while rotating at appropriate intervals, and between the adjacent steel pipe piles 3, there are both side edges 4a, 5a close to the outer peripheral surface of the painting pipe pile 3 on both sides of the closest position of the painting pipe pile 3. The pair of side plates 4 and 5 are constructed by press-fitting a junction 7, which is integrally connected by a connecting member 6 passing between the art tube piles 3, to a required depth.

The steel pipe pile 3 is installed at the first
As shown in the figure, rotational press-fitting is carried out from the riverbed 15 to the required depth DI, but when the total length becomes long, multiple unit-length steel pipe piles are sequentially connected by on-site welding or other methods and rotary press-fitted. .

The junction 7 is vertically press-fitted between the two steel pipe piles 3 that have already been rotationally press-fitted, using the side steel pipe piles 3 as a guide, but the main purpose is to obtain a water-stopping effect between the steel pipe piles 3. In some cases, it is press-fitted from the river bed 15 to a depth D2 that can provide the water-stopping effect. Of course, the upper end of the junction 7 is located at the upper end of the steel pipe pile 3 and the roadway level.

The cross-sectional shape of the junction 7 is not limited to that shown in FIG. In addition, although the steel pipe pile column row 1 composed of the steel pipe pile 3 and the junction 7 is illustrated as above, connecting members having a C-shaped or T-shaped cross section are fixed and protruded over the entire length of the steel pipe pile on both sides in the diametrical direction. It may also be a steel pipe pile pillar row formed by press-fitting only conventional general steel pipe sheet piles into a pillar row so that adjacent connecting members fit into each other.

A head connection part 2 is attached to the upper end of the steel pipe pile column row L constructed as described above.
As shown in FIGS. 4 to 6, the head joint 2 is constructed by attaching the steel pipe pile to the underside of the hollow frame 16 for constructing the head joint that rests on the steel pipe pile column row l. A plurality of pieces (three in the illustrated example) that are individually fitted into the upper ends of the steel pipe piles 3 in the column row 1.
It is constructed using a positioning fitting member 17 attached movably in the length direction of the column column.

That is, the hollow frame 16 for constructing the head connection part has an oblong box shape in which only the side plates 19 are stretched over a frame 18 made of angle material or the like, and the upper and lower sides and both lengthwise ends are open. Inward groove-shaped guide rails 20a and 20b are provided on both sides of the bottom, and the upper plate of the groove-shaped guide rails 20a and 20b is a cover plate 21a that covers both left and right sides of the upper end of the steel pipe pile column row l. , 21b. Further, each of the positioning fitting members 17 has a tapered fitting guide 23 protruding from the outside of the bottom of the bottomed cylindrical body 22 that fits into the steel pipe pile 3, and the hollow frame 16 for constructing the head connecting portion. 2 that fits into the groove-shaped guide rails 2Oa and 20b of
Two sliding bodies 24a and 24b are attached to the upper end of the bottomed cylindrical body 22 via connecting plates 25a and 25b, and these hollow frame 16 for constructing the head connection part and fitting member 17 for positioning are installed at the factory. The front part is manufactured and delivered to the site.

The hollow frame 16 in which each positioning fitting member 17 is set is suspended above the steel pipe pile column row 1 with each fitting member 17 positioned directly above each steel pipe pile 3, and each fitting member 17 is The member 17 is fitted into the upper end of the steel pipe pile 3. At this time, even if there are variations in the spacing between the steel pipe piles 3, each fitting member 17 is movable relative to the hollow frame 16 in the length direction (column row direction) of the guide rails 20'a, 20b. Coupled with the guiding action of the shape fitting guide 23, it is possible to fit each steel pipe pile 3 reliably and smoothly.

When the hollow frame 16 is placed on the upper end of the steel pipe pile column row l in this way, the left and right pair of connecting plates 25 of each fitting member 17 are
a, 25b are connected to cover plates (21a, 21b) on the side of the hollow frame 16 overlapping with bolts/nuts 26, and each fitting member 17 is fixed to the hollow frame 16. However, if the hollow frame 16 cannot be stabilized horizontally due to variations in the level of the upper ends of the steel pipe piles 3 and the upper ends of the junctions 7, the four corners of the hollow frame 16 may be fixed as shown in FIG. For example, the hollow frame 16 can be stably supported in a horizontal state by screwing and unscrewing the level adjustment bolts 27 screwed through both ends of the cover plates 21a and 21b. At this time, a mortar-filled portion 28 filled with soil and hardened inside the junction 7 serves as a surface that supports the hollow frame 16 via each level adjustment bolt 27.
Alternatively, a plate may be attached to the upper end of the junction 7, and the tip of the level adjustment bolt 27 may be received by the plate.

Furthermore, if necessary, in order to fix the hollow frame 16 and the steel pipe pile column row 1, each steel pipe pile 3 and each fitting member 17 fitted therein can be fixed to each other by, for example, an adhesive.

As described above, the hollow frames 16 are sequentially set on top of the steel pipe pile column row 1 so as to be continuous in the direction of the column row, and the ends of the adjacent hollow frames 16 are connected to each other at both ends of the hollow frame 16. They are connected by bolts and nuts using the plate 18a. Then, cover plates are attached to the free ends of the hollow frame 16 located at both ends of the head connecting part 2 to close them off. Thereafter, concrete is placed inside each hollow frame 16 and inside the bottomed cylindrical body 22 of each fitting member 17 to construct the head connecting portion 2. In this case, if necessary, it is possible to arrange reinforcement inside the hollow frame 16 to make it made of reinforced concrete, but this reinforcement work should be done when the hollow frame 16 is manufactured at the factory, and the arrangement at the construction site. Muscle work can also be eliminated. Of course, if the size of the head joint 2 is small, pouring concrete into the hollow frame 16 is omitted, and the upper opening of the hollow frame 16 is closed with a cover plate, leaving the head joint 2 hollow. Also good.

Additionally, as shown in Figures 1, 2, and 5, it is necessary to install a decorative panel 29 made of steel plate or concrete plate on the outside of the upper end of the steel pipe pile column row 1 that is exposed above the water surface. In this case, the upper end of the decorative panel 29 is connected to the hollow frame 16.
The decorative panels formed at the lower ends of both left and right sides can be attached to the portion 30 with bolts 31 or the like. Furthermore, as shown in FIGS. 5 and 6, for example, a decorative panel 32 covering the outside can be pasted on the hollow frame 16 itself, or as shown in FIGS. When using the connecting part 2 as a promenade, the handrail 33
In addition, it is also possible to install Efsteria such as fences and flower beds.

(Operations and Effects of the Invention) The construction method of the present invention can be implemented as described above, and according to the construction method of the present invention, a hollow frame for constructing a head connection part is placed on the constructed steel pipe pile column row. After each lower positioning fitting member is transferred so that it fits inside the upper end of the steel pipe pile, each of the fitting members and the hollow frame are fixed, and if necessary, concrete is poured into the hollow frame. This eliminates the need to assemble concrete formwork for constructing head connections on steel pipe pile column rows and to dismantle and remove formwork after concrete curing, reducing man-hours for manufacturing head connections on site. It can be significantly reduced.

Moreover, the hollow frame can be firmly connected to the steel pipe pile column row by the plurality of positioning fitting members, and since the positioning fitting members are movable in the direction of the column column, the steel pipe The hollow frame can be reliably connected to the steel pipe pile column without being affected by variations in the spacing between the steel pipe piles in the pile column.

[Brief explanation of drawings]

Figure 1 is a side view, Figure 2 is a vertical front view, Figure 3 is a cross-sectional plan view, Figure 4 is a side view explaining the construction method for the head joint, and Figure 5 is a side view.
The figure is a longitudinal front view explaining the details of the constructed head joint, and Figure 6 is a cross-sectional plan view of the same.
2... Head connection part, 3... Steel pipe pile, 7... Junction, 16... Hollow frame for constructing the head connection part, 17...
・Fitting member for positioning, 20a20b...Groove guide rail, 21a, 21b...Cover plate, 22・
...Bottomed cylindrical body, 23...Tapered fitting guide, 24
a, 24 b...Sliding body, 2932... Decorative panel.

Claims (1)

[Claims] A plurality of positioning fitting members that are individually fitted into the upper ends of the steel pipe piles in the steel pipe pile column are installed on the lower side of the hollow frame for constructing the head connection part that rests on the constructed steel pipe pile column. It is mounted so as to be movable in the length direction, and each positioning fitting member is fitted into the upper ends of the plurality of steel pipe piles of the steel pipe pile column row,
Each positioning fitting member is fixed to the frame, and concrete is poured into the frame, or the frame is left hollow to serve as the head connection. Construction method.