JPH052667Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is a continuous arc-shaped cell that is used as a foundation structure for seawalls, quays, breakwaters, cofferdams, or structures in water areas such as ports and rivers. It's about structures.

[Conventional technology]

Conventionally, as a cell structure, as shown in FIG. A circular cell-combined cell structure is known in which a space surrounded by an adjacent circular cell 11 and an arc portion 12 is filled with a filling material 3 such as sand.
Further, as shown in FIG. 18, arcuate portions 1 whose intermediate portions are curved so as to protrude outward are arranged continuously in the width direction of the arcuate portions to form an arcuate portion continuous wall 2. The joints of the respective arcuate parts 1 in the two rows of arcuate continuous walls 2 facing each other are continuous via the partition wall part 13, and the space surrounded by the arcuate part 1 and the partition wall part 13 is filled with sand or the like. Continuous arc cell structures filled with material 3 are also known.

The cell structure includes the shear resistance of the filling material 3 and the joint fitting part of the linear steel sheet pile 14 that constitutes the partition wall part (in the case of a circular cell, the part between the pair of arc parts is the partition part) 13. resists external forces through frictional resistance.

The frictional resistance of the joint fitting portion is due to the horizontal tensile force generated in the straight steel sheet piles 14 in the partition wall portion due to the pressure of the filled filling material 3. Therefore, the greater the tensile force acting on the linear steel sheet pile or the friction coefficient of the joint fitting portion, the greater the frictional resistance force at the partition wall portion.

However, in a normally used circular cell, the part corresponding to the partition wall is subject to the pressure of the filling material filled between the pair of arc parts, so the tension in the partition wall part that occurs in the case of a single circular cell is The force decreases, and as a result, the frictional resistance force at the joint fitting portion decreases, resulting in a decrease in the frictional resistance force at the partition wall portion.

Therefore, in order to fully exert the frictional resistance in the partition wall, the partition wall needs to be linear, and from this point of view, the continuous arc-shaped cell structure is the most ideal shape. I can say that there is.

[The problem that the idea aims to solve]

However, the partition wall in the conventional arc-shaped continuous cell structure is made of a straight steel sheet pile or a steel plate with fitting joints attached to both edges of the steel plate, so it is strong against tensile force. The bending rigidity is low, and therefore, the pressure of the filled filling material may cause excessive bending deformation in the partition wall, which may cause the partition wall to break. For this reason, a partition wall structure that is strong in both tensile force and bending force is desired.Also, in order to reduce the interval between continuous arc walls in a continuous arc cell structure, a partition wall structure with excellent shear resistance performance is required. It was wanted.

This device is strong against tensile force and bending force,
It is an object of the present invention to provide a continuous arc-shaped cell structure having a partition wall structure that also has excellent shear resistance performance.

[Means to solve the problem]

In order to achieve the above object, in the continuous arc-shaped cell structure of this invention, the arc-shaped parts 1 curved so that the middle part protrudes outward are arranged continuously in the width direction of the arc-shaped parts. , an arc-shaped continuous wall 2 is constructed, the joints of each arc-shaped part in two rows of arc-shaped continuous walls 2 facing each other at an interval are connected via a partition part, and are surrounded by the arc part and the partition part. In an arc-shaped continuous cell structure in which the space is filled with filling material 3 such as sand, fitting joints 4 are provided on both side edges.
A pair of flanges 5 equipped with
are connected through the intermediate composite sheet piles 7 and the end composite sheet piles 8, and a large number of intermediate composite sheet piles 7 and end composite sheet piles 8 are arranged in series, and adjacent composite sheet piles 7 and end composite sheet piles 8 are arranged in series. The fitting joints 4 of the sheet piles are engaged with each other to form the partition part 9, and the fitting joints 4 at both ends of the partition part 9 are engaged with the fitting joints 10 at the ends of the arcuate part 1.

[Function] Each fitting joint 4 in a large number of intermediate composite sheet piles 7 and end composite sheet piles 8, which have excellent bending resistance performance, are interlocked with each other to form the partition wall portion 9 in the arc-shaped continuous cell structure. Therefore, the partition wall portion 9 exhibits great strength against the bending force exerted by filling the filling material 3, and the filling material 3
When the filling is completed, a large horizontal tensile force acts on the partition wall 9, but in response to this tensile force,
A pair of flanges 5 in the composite sheet piles 7 and 8 provide resistance. In addition, since the partition wall portion 9 is linear, the filling of the filler material 3 does not cause a decrease in tension at the joint between the composite sheet piles in the partition wall portion 9, and furthermore, the shear resistance of the partition wall portion 9 is reduced. Since the distance between the continuous arcuate walls 2 can be increased, the interval between the continuous arcuate walls 2 can be narrowed.

〔Example〕

Next, this invention will be explained in detail using illustrated examples.

Figure 3 shows a first example of a steel intermediate composite sheet pile 7 that can be used to implement this invention, in which a pair of flanges 5 with fitting joints 4 on both side edges are spaced apart. A pair of webs 6 are arranged between each flange 5 at intervals in the flange width direction, and the web 6 and the flange 5
It is fixed by welding.

FIG. 4 shows an example of a steel end composite sheet pile 8 that can be used to implement this invention, in which one side of a pair of flanges 5 in the width direction is bent so as to widen from each other. However, the other configurations are the same as those of the intermediate composite sheet pile 7.

FIG. 5 shows a second example of a steel intermediate composite sheet pile 7 that can be used to implement this invention, in which a pair of flanges 5 are connected at the center in the width direction via a single web 6. However, the other configurations are the same as those of the intermediate composite sheet pile 7 of the first example.

1 and 2 show an arc-shaped continuous cell structure using the intermediate composite sheet pile 7 and the end composite sheet pile 8 of the first example, in which a large number of intermediate composite sheet piles 7 are used. The fitting joints 4 of adjacent intermediate composite sheet piles 7 are arranged in series, and the fitting joints 4 of adjacent intermediate composite sheet piles 7 are engaged with each other, and the end composite sheet piles 8 are fitted into the fitting joints 4 of the intermediate composite sheet piles 7 at both ends. Fitting 4
are engaged with each other, and a partition wall portion 9 is constituted by each intermediate composite sheet pile 7 and each end composite sheet pile 8.

A large number of partition walls 9 are arranged in parallel at intervals, and fitting joints are fixed by welding to both widthwise ends of a plane arc-shaped steel plate to form an arc-shaped part 1, or a large number of straight steel plates are formed. The sheet piles 15 are arranged in an arc shape, and the fitting joints of the adjacent linear steel sheet piles 15 are engaged with each other to form the arcuate portion 1, and the arcuate portion 1 is formed between the ends of the adjacent partition wall portions 9.
are arranged, and the fitting joints 10 at the ends in the width direction of the arcuate portions 1 are engaged with the fitting joints at the ends of the partitions in the end composite sheet piles 8, and each arcuate portion 1 The filling material 3 such as sand is curved so as to protrude outward, that is, to separate from between the adjacent partition walls 9, and the space surrounded by each arcuate part 1 and each partition wall 9 is filled with filling material 3 such as sand. Filled.

When implementing this invention, as shown in FIG.
A time-hardening filler 16 such as mortar or concrete is filled in all the box-shaped spaces surrounded by the above, and a time-hardening filler 16 such as mortar or the like is filled in the space at the interlocking part of the fitting joint of each composite sheet pile in the partition wall 9. It may also be filled with a synthetic filler. If you do this,
The shear resistance of the partition wall portion 9 can be significantly increased.

As shown in FIG. 7, the time-hardening filler 16 may be filled only in the space surrounded by the adjacent composite sheet piles 7 and 8 in the partition wall portion 9, and as shown in FIG. The reinforcing bars 17 for shear reinforcement and anti-slip are fixed to the webs 6 of the adjacent composite sheet piles 7 and 8 by welding, and the space surrounded by the adjacent composite sheet piles 7 and 8 is filled with a time-hardening filler 16. , the reinforcing bars 17 may be embedded in the time-hardening filler 16.

As shown in FIG. 9, a large number of stud dowels 18 are fixed inside the widthwise ends of the flanges 5 of the adjacent composite sheet piles 7 and 8 in the partition wall 9, and between the adjacent composite sheet piles 7 and 8. The stud dowel 18 may be embedded in the filled filler material 16 that hardens over time. Further, as shown in FIG. 10, a large number of stud dowels 18 are fixed to the outer surface of the web 6 of the adjacent composite sheet piles 7 and 8 in the partition wall portion 9, and a time-hardening filling is filled between the adjacent composite sheet piles 7 and 8. The stud dowel 18 may be embedded in the material 16. Further, as shown in FIG. 11, a large number of stud dowels 18 are fixed to the inner side of the widthwise end of each flange 5 of the adjacent composite sheet piles 7 and 8 in the partition wall portion 9 and to the outer surface of the web 6. ，
The stud dowel 18 may be embedded in a time-hardening filler 16 filled between the holes 8 and 8.

In the cases shown in FIGS. 8 to 11, the shear resistance of the partition wall 9 can be significantly increased by simple means.

In the case of FIG. 12, a reinforcing rib 19 with an L-shaped cross section extending in the vertical direction is fixed by welding to the inner intermediate portion of the flange 5 of each composite sheet pile 7, 8 in the partition wall portion 9.

13 to 16 show modified examples of the fitting joint. In the case of FIG. 13, the intermediate portion of the end plate 20 is fixed to both ends of the flange 5 in the width direction, and the flange 5 Side edges of an arcuate groove-shaped engagement plate 21 are fixed by welding to one side of the front surface and the other side of the back surface. In the case of Figure 14,
A tube body 22 is fixed by welding to one side of the flange 5 in the width direction, and a slitted tubular receiving fitting 23 having a partially cut-out circular cross section is fixed by welding to the other side of the flange 5.

In the case of FIG. 15, the middle part of the end plate 20 is fixed to one side in the width direction of the flange 5, and the receiving fitting 24 with an inwardly flanged grooved cross section is welded to the other side of the flange 5. It is fixed by. In the case of FIG. 16, a wedge-shaped insertion fitting 25 is fixed by welding to one side of the flange 5 in the width direction, and a wedge-shaped grooved receiving fitting 26 is fixed by welding to the other side of the flange 5. has been done.

[Effect of idea]

This idea is structured as described above, so
This produces the effects described below.

Each fitting joint 4 in a large number of intermediate composite sheet piles 7 and end composite sheet piles 8, which have excellent bending resistance performance, are interlocked with each other to form a partition wall portion 9 in the arc-shaped continuous cell structure. Therefore, the partition wall portion 9 exhibits great strength against the bending force exerted by filling the filling material 3.
When the filling is completed, a large horizontal tensile force acts on the partition wall 9, but in response to this tensile force,
Since the pair of flanges 5 in the composite sheet piles 7 and 8 provide resistance, the strength of the partition wall portion 9 against tensile force is high, and since the partition wall portion 9 is linear, the filling of the filling material 3 causes a Tension does not decrease at the joint between the composite sheet piles, and therefore a large frictional resistance can be exerted at the fitting joint meshing portion of the composite sheet piles 7 and 8 in the partition wall portion 9.

In addition, since the shear resistance of the partition walls 9 can be increased, the interval between the arc-shaped continuous walls 2 can be narrowed, and therefore the amount of filling material used can be reduced, and the ground improvement area at the bottom of the cell structure can be reduced. Since the construction cost can be reduced significantly, construction costs can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional plan view showing a continuous arc-shaped cell structure according to an embodiment of this invention, FIG. 2 is a cross-sectional plan view showing an enlarged part of FIG. 1, and FIG. FIG. 4 is a plan view showing an example of an end composite sheet pile that can be used when implementing this idea, and FIG. It is a top view which shows the 2nd example of the intermediate composite sheet pile which can be used when implementing an invention. FIG. 6 is a cross-sectional plan view showing a state in which all the spaces in the partition wall are filled with a time-hardening filler;
The figure is a cross-sectional plan view showing a state in which only the space between adjacent composite sheet piles in the partition wall is filled with a time-hardening filler, and Figure 8 shows reinforcing bars fixed to the ends of adjacent composite sheet piles and hardening over time. FIGS. 9 to 11 are cross-sectional plan views showing the state in which the filler is filled, and FIG. 1 is a cross-sectional plan view showing a state in which reinforcing ribs are attached to a composite sheet pile, and FIGS. 13 to 16 are plan views showing modified examples of the fitting joint. FIG. 17 is a cross-sectional plan view showing a conventional circular cell combination type cell structure, and FIG. 18 is a cross-sectional plan view showing a conventional arc-shaped continuous cell structure. In the figure, 1 is an arc-shaped part, 2 is an arc-shaped part continuous wall,
3 is the filling material, 4 is the fitting joint, 5 is the flange, 6
is a web, 7 is a composite sheet pile for the middle, 8 is a composite sheet pile for the end, 9 is a bulkhead, 10 is a fitting joint, 16 is a time-hardening filler, 17 is a reinforcing bar for shear reinforcement and slip prevention, 18 is a stud dowel It is.

Claims (1)

[Scope of utility model registration request] The arcuate portion 1 is curved so that the intermediate portion protrudes outward, and is arranged continuously in the width direction of the arcuate portion,
An arc-shaped continuous wall 2 is constructed, in which the joints of the respective arc-shaped parts in two rows of arc-shaped continuous walls 2 facing each other at an interval are connected via a partition part, and are surrounded by the arc part and the partition part. In an arc-shaped continuous cell structure in which the space is filled with a filling material 3 such as sand,
A pair of flanges 5 equipped with fitting joints 4 on both side edges are arranged parallel to each other at intervals, and each flange 5 is connected via a web 6 to form an intermediate composite sheet pile 7 and an end composite sheet pile. The sheet pile 8 is configured,
A large number of intermediate composite sheet piles 7 and end composite sheet piles 8 are arranged in series, and the fitting joints 4 of adjacent composite sheet piles are engaged with each other to form a partition wall 9. A continuous arc-shaped cell structure in which fitting joints 4 at both ends of the arc-shaped part 1 and fitting joints 10 at the ends of the arc-shaped part 1 are engaged with each other.