JPS6051210A - Construction of breakwater - Google Patents

Abstract

PURPOSE:To increase the stress resistance of a breakwater as well as the cost of construction by a method in which support piles are erected at given intervals, concrete piles are connectedly fixed between the adjacent support piles, and a wave-dissipating concrete is fixed to the upper ends of the support piles. CONSTITUTION:Both ends of a RC concrete panel 12 are penetrated between guide plates 6 for adjacent steel tubular support piles 2, nuts 10 are loosened, and the folded portion 6a is turned inwards by force of a spring 9 to hold the panel 12. Steel plate, etc., is welded to the lower end of the plate 6 for sealing, and cement mortar 5 is packed between the plates 6 to integrate the panel 12 with the support piles 2. Tide embankment concrete 3 is fixed to the upper ends of the support piles 2 and reinforcing piles 4 to complete a breakwater.

Description

[Detailed description of the invention] The present invention relates to a method for constructing a breakwater in a harbor or the like.

Conventionally, this type of breakwater has been constructed by erecting support piles (b) at predetermined intervals on the seabed (a), as shown in Figure 1 (a), and installing breakwater concrete bodies (C) at the upper ends of these support piles (b). ), and a construction method in which a panel (d) of reinforced concrete (RC) or prestressed concrete (PC) is suspended and fixed from the bottom surface of the concrete body (C),
Alternatively, the construction method is the same as the one described above until the concrete body (c) is fixed, and then the steel sheet pile (e) is moved from the seabed (a) to the concrete instead of the RC or PC panel (d), as shown in Figure 1 (b). However, in the breakwater obtained by the former construction method, the RC or PC panel (d) becomes a cantilever beam and has the disadvantage of being weak in terms of stress. The breakwater constructed using the latter method used steel sheet piles (e), which had the disadvantage of increasing construction costs.

The present invention aims to eliminate these drawbacks and provide a method for constructing a breakwater that is strong in terms of stress and can be obtained at low cost. Support piles were erected at every JJ interval, concrete panels were connected and fixed between adjacent support piles, and wave-break concrete bodies were fixed to the upper ends of these support piles.

An embodiment of the construction method of the present invention will be described with reference to FIGS. 2 to 9.

As shown in the second figure, copper flexible guide plates (6) (6) each having a J-shaped tip folded inward are placed on both sides or one side of the steel pipe support pile (2) in advance. and weld.

Note that ribs (7) (7) are welded in advance to the outer surfaces of these kite brakes (6) (6) at appropriate intervals. In addition, the guide plate (6) (6) open support pile (
2) A large number of dowel reinforcements (8) are welded to the side surface at appropriate intervals. Further, a spring (9) is fitted between the folded part (6a) and the intermediate part (6b) of each guide plate (6), and a bolt (1 piece) is screwed into the nut (10) of the intermediate part (6b). ) is rotatably tied to the folded portion (6a).

Thereafter, the supporting piles (2) and the m-tube reinforcing piles (4) are driven into the seabed (1) at predetermined intervals and fixed as shown in the third diagram.

In addition, in each guide play 1 (6) Pol) (11)
Turn the fold 1 (6a) against the spring (9) to bring the fold 1 (6a) closer to the middle part (6b) by a distance t as shown by the dotted line in FIG. ) and widen the gap between them.

Next, guide play 1-(
6) Insert the springs (9) (9) (9) + 7) between (6) and (6) (6) as shown in Figs. '/l! The turning parts (6a) (6a) are pushed inward by the turning parts (6a) (6a), and the concrete panel (6a) is
12) Pinch both ends of. This causes the panel (12
) and guide play 1- (6) (6) and (6) (6)
and is secretly watching over her. After cutting, weld a steel plate, etc. to the lower end of the guide plate (6) and seal it.
) (6) Fill the space with mortar (5) to integrate the concrete panel (11) and the support pile (2). Finally, the breakwater concrete body (3) is fixed to the two ends of the supporting piles (2) and the reinforcing piles (4) to complete the breakwater as shown in FIGS. 7 to 9. Here) As mentioned in 0.
By loosening or cutting the bolts (10), a seal is created between the concrete panel (12) and the guide plates (6) (6), making construction easier during underwater work. Since there is a margin of t, it is possible to absorb the rotation of the support pile (2) when fixing the support pile (2) and the manufacturing error of the concrete panel (12).

In addition, if the external force due to waves is small, dowel bars (7), mortar (5), etc. are omitted, and double-sided id plates (6) (6) are used.
) The concrete panel (12) may be fixed by simply tightening the bolts (9) (9). Also, support piles (2)...(2) and panels (12)...(12)
It may be constructed so that the water reaches the seabed (1).

In this way, according to the present invention, the concrete panels are connected and fixed between the support piles, so the stress is much stronger compared to the conventional method of simply hanging and fixing the concrete panels, and the construction cost is reduced because steel sheet piles are not required. In addition, by making the concrete panels larger and stronger, fewer steel pipe piles need to be driven. The prefabricated structure enables rapid construction, and is useful for diagonal pile type breakwaters, especially curtain wall type breakwaters, as well as wall structures such as self-supporting steel pipe pile type breakwaters, earth retaining revetments, and boat quays. Applicable nT
It has a certain effect.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a breakwater constructed using the conventional construction method; Figure 2 is a sectional diagram of support piles used in the construction method of the present invention; Figures 3 and 5;
Figure 7 and Figure 7 are cross-sectional views of a breakwater constructed using the construction method, Figure 4 is an enlarged cross-sectional view of the kite plates on the support piles, and Figure 6 is the concrete plates installed on the support piles. FIG. 8 is a sectional view taken along the line 1--2 in FIG. 7, and FIG. 9 is a sectional view taken along the line IX-IXX in FIG. 7. (1)...Sea floor (2)...Support pile (3)...Breakproof concrete I/body (12)...Concrete panel patent applicant Tamazuki: Kenichimei Co., Ltd.

Claims (2)

[Claims] (1) Support piles are erected at predetermined intervals on the bottom of the ocean, etc., concrete panels are connected and fixed between adjacent support piles, and breakwater concrete bodies are fixed to the two ends of these support piles. A method of constructing a breakwater consisting of: (2) On the support pile, a pair of guide plates each having a substantially J-shaped folded tip are welded to the side surface of the support pile at the base so that the folded surfaces of the tips face each other, and 2. The method of constructing a breakwater according to claim 1, wherein the concrete panels are connected and fixed between the support piles by fitting and fixing side ends of the concrete panels between opposing folded surfaces.