JP2649686B2 - Honeycomb steel arrow wall - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention is used for large structural components such as structural foundations, retaining walls, seawalls and underground walls in the fields of civil engineering, architecture or marine structures. The present invention relates to a honeycomb steel arrow wall constructed in a honeycomb shape.

(Prior art) As is well known, JIS A5 has conventionally been used as a component member of this type of structural foundation, retaining wall, seawall or underground wall.
Various types of steel arrow walls specified in 528 are used in large quantities, and especially when used for large structures that require large load bearing capacity, steel sheet piles are connected to each other with reinforcing steel. A structure having a large section modulus is adopted. For example, JP-A-62-137311 discloses a steel sheet pile segment double wall structure in which steel sheet piles are interconnected by tie members. In addition, box-type steel sheet piles, round steel pipes and square steel pipes are disclosed. Are connected to each other to form a well-shaped wall.

In general, steel sheet piles are easy to set up, a wall of any length can be constructed by joint engagement, etc., and a steel sheet pile with an appropriate structure can be selected according to the required pressure strength Therefore, the degree of freedom of design is large, and from such advantages, steel arrow walls having various forms have been invented and put into practical use as constituent members for large structures.

(Problems to be solved by the invention) In recent years, in the fields of civil engineering, architecture, and port buildings,
The components themselves are becoming increasingly large, and the expectations for steel sheet piles with respect to the strength against vertical loads and horizontal loads are extremely high.In addition, constructions with good workability and short construction work time are required. Now required.

However, in the construction of the well-known steel arrow walls, there is a problem that the work time is long and the cost is high, such as installation of reinforcing steel materials and a large number of guides at the time of installation, and In the steel arrow wall,
Since it depends only on the lateral pressure resistance of the surrounding soil, relatively large root penetration is required, and there is also a problem that especially in the case of soft ground, it is necessary to construct a very deep one.

On the other hand, even if the caisson structure is against a large steel arrowhead, it will not be able to take root deeply and it will be heavy, so it will be necessary to improve the ground on soft ground, resulting in higher costs, etc. Issues.

As described above, at present, there is no steel arrow wall structure suitable for the case where the required strength is large and the tolerance for bending, compression and displacement is small.

Accordingly, the object of the present invention is to take into account the above-mentioned conventional circumstances, to withstand large vertical loads and horizontal loads, to have high rigidity and pressure resistance, and to have remarkable large resistance to bending and compression, suitable for large structures. Further, it is an object of the present invention to provide a honeycomb steel arrowhead having excellent workability.

(Means for Solving the Problems) The present invention provides a plurality of square steel pipe sheet piles having a hollow hexagonal cross section and having equal length twin-fitting joints projecting radially from a required ridge at the center of the shaft. Honeycomb steel sheet walls formed in a honeycomb shape by sequentially connecting the isometric double-fitting joints respectively corresponding to the individual square steel sheet piles as a single piece in a two-dimensional diagonal direction corresponding to the radial direction. It is.

Here, a square steel pipe sheet pile having equal length twin-fitting joints at all ridges and a square steel pipe sheet pile having equal length double-fitting joints at two or more ridges are used. Having an isometric twin fitting joint in a part of the upper half,
Using a joint with a jointless lower pile at the lower part of the body of the square steel sheet pile, connecting the hollow inside of the body of the square steel sheet pile or the hollow inside of the body of the square steel sheet pile including the jointless lower pile, and connecting the joint It is also possible to fill the interior of the cavity between the square steel sheet piles to be formed with concrete.

(Action) The honeycomb steel sheet wall of the present invention has a hollow hexagonal cross section, and uses a square steel sheet pile with an isometric double-fitting joint protruding radially from a required ridge at the center of the shaft. By sequentially connecting the long and twin mating joints in two-dimensional directions that are skewed vertically and horizontally, it is possible to easily construct a honeycomb-shaped steel arrow wall having a relatively thick overall wall thickness and high rigidity. obtain. In addition, when individual equal length double-fitting joints are connected as expected, a cavity that forms part of the honeycomb is formed between the square steel sheet piles, so that they are balanced and structurally stable. A honeycomb steel arrow wall can be constructed. Further, as the isometric twin fitting joint, a half-section member of a straight steel sheet pile can be used,
The honeycomb steel arrowhead is excellent in fitting and water tightness, and has high joint strength and high reliability.

And the structure which mutually connected the square steel pipe sheet pile provided with the equal length double fitting joint in the whole ridge corner part and two or more ridge corner parts can easily show the honeycomb-shaped form balanced in plane.

(Example) Hereinafter, with respect to an example of the honeycomb steel arrowhead according to the present invention,
This will be described in detail with reference to the accompanying drawings.

1 and 2 are a plan view and a perspective view schematically showing a schematic structure of a honeycomb steel sheet wall to which a first embodiment of the present invention is applied.

In the configurations shown in the drawings of these embodiments, the honeycomb steel arrowhead 1 has a hollow corner provided with isometric double-fitting joints extending in the radial direction at all ridges of a flat hexagon and at two to four or more ridges. It has steel pipe sheet piles 2, 3 and 4, and each of the square steel pipe sheet piles 2, 3 and 4 is two-dimensionally oriented (two-dimensionally inclined) by individual isometric double fitting joints at each corresponding position. In the row direction), the joints are sequentially connected and driven to the required depth, thereby constructing a planar honeycomb shape as a whole structure.

That is, the individual square steel pipe sheet piles 2, 3 and 4 each constitute one unit of a flat hexagonal honeycomb frame having a hollow cross section, and each of the square steel pipe sheet piles 2, 3 and 4
Isometric twin-fitting joints (see FIGS. 3 to
FIG. 6) constitutes a similar planar hexagonal honeycomb unit that is adjacent to each unit of each square steel sheet pile 2, 3, and 4 with its individual joint connection.

Therefore, the structure of the honeycomb steel sheet wall 1 constructed in this manner does not require a large-scale support frame or reinforcing steel material, and is completely different from the conventional case.
And 4 are simply installed while being connected sequentially with their respective equal length twin-fitting joints, so that a large wall structure having the required dimensions and capable of withstanding a large load can be easily constructed in a relatively short construction period. It is. Also, as is well known, the honeycomb structure here is a wasteful mechanically superior structure to a planar structure and is extremely strong, so that it can withstand required vertical loads and horizontal loads. It has a very high proof strength and can sufficiently withstand an impact force such as an earthquake.

Next, FIG. 3 and FIG. 4 are plan views each schematically showing a detailed structure of each of the square steel pipe sheet piles 2 and 4.

That is, the square steel pipe sheet pile 2 is provided with equal length double-fitting joints 5a to 5f that protrude radially from all corners, and the square steel pipe sheet pile 4 is adjacent to each other.
Equal length twin-fitting joints 5g to 5j which similarly protrude in the radial direction with respect to the corners of the places are provided. Here, the former square steel pipe sheet pile 2 is mainly accommodated inside the wall structure, and the latter is Square steel sheet piles 4 correspond mainly to the sides of the wall structure. In this case, detailed description of the remaining square steel sheet piles 3 is omitted in this case, but they mainly correspond to corner portions of the wall structure.

In the first embodiment, each of the square steel pipe sheet piles 2 and 4
Isometric twin-fitting joints 5a to 5j, which are provided to protrude in the radial direction at the ridge corners, are generic names for joint members in a broad sense in which male and female are formed in the same form, for example, a half-section member of a straight steel sheet pile. Is preferably used. The double-fitting joints 5a to 5j of this configuration are very easy to connect with each other, are suitable for casting, and are excellent in watertightness, and have high tensile strength as a full-strength joint. It functions extremely effectively to maintain the mechanical strength of the arrow wall 1. On the other hand, as a joint member, for the purpose of forming or constructing the steel arrow wall 1 here in a honeycomb shape, it is desirable that any of the length dimensions is equal to each other. In this case, the above functions are combined. A long and twin fitting joint member is used.

Next, with respect to the square steel pipe sheet pile 2, details of the point that the isometric double fitting joints 5a to 5f protrude in the radial direction from the ridge corners will be described with reference to FIG.

In FIG. 5, an isometric twin fit along a vertical plane 7a to 7c encompassing the axial center O of a square steel pipe sheet pile main body (hereinafter, simply referred to as a main body) 2a having a hexagonal cross section (hereinafter also simply referred to as a main body) and each of the ridges 6a to 6f. The joints 5a to 5f are extended. In the present invention and the first embodiment, this aspect is referred to as an isometric double-fitting joint protruding radially from the corner.

And, as described above, since the isometric double-fitting joints 5a to 5f have the same protruding lengths and are along the vertical surfaces 7a to 7c, the honeycomb-like construction is easy as described above, At the same time, it is possible to exhibit a balanced strength against vertical loads and horizontal loads acting on the wall structure. That is, since the twist and the distortion hardly occur, it is possible to configure the honeycomb wall 1 having high mechanical reliability.

This is exactly the same for the square steel pipe sheet piles 3 and 4 which are mainly applied to the outer peripheral portion when the honeycomb steel sheet wall 1 is formed. For example, as shown in FIG. In the case of the steel pipe sheet pile 4, the isometric double-fitting joints 5g to 5j along the vertical planes 7d to 7f passing through the axial center O of the main body 4a.
Has been extended.

Next, as a reference example to be compared with the first embodiment, a case where the invention is applied to a square steel sheet pile having a hollow rectangular cross section is shown in FIGS. 7 to 9, FIG. 10, and FIG.

In the configurations of these reference examples, each square steel pipe sheet pile main body 8 to 10 having a square shape corresponds to each of the square steel pipe sheet piles 2 and 4 having a regular hexagonal shape in the first embodiment. From each of the corners 11a to 11i of each of the main bodies 8a, 9a, 10a, isometric double-fitting joints 12a to 12
i is protruding.

Steel arrowhead using these square steel pipe sheet pile bodies 8 to 10
In FIG. 13, since each of the main bodies 8a to 10a has a square cross-sectional shape, it is advantageous in terms of the manufacturing cost as compared with the square steel pipe sheet piles 2 and 4 when viewed as an individual unit. When comparing the honeycomb steel wall 1 in the first embodiment with the steel wall 13 in the reference example, it is sufficiently excellent from a mechanical standpoint that the first embodiment has a correct honeycomb shape. It is clear that

Next, FIG. 12 is a perspective view schematically showing a schematic structure of a honeycomb steel sheet wall to which a second embodiment of the present invention is applied.

The second embodiment is a honeycomb steel sheet wall 17 using hexagonal steel pipe sheet piles 14 to 16 in which the equal length twin-fitting joints 5k are provided only in the upper half or a part of the upper half of the main body. It is a structure of. That is, the structure of the nekham steel arrowhead 17 enables economical implementation when constructing a large depth. Similarly, as a reference example, FIG. 13 also shows each square steel pipe sheet pile 18 having a square shape in which the isometric double-fitting joint 51 is provided in the upper half or a part of the upper half of the main body as described above. 20 to 20 are used to illustrate the configuration of the honeycomb steel arrow wall 21.

FIGS. 14 and 15 show a case where the jointless lower pile 22 is provided below the square steel pipe sheet piles 23 to 25 in the case of the reference example configuration of FIG. This structure is constructed on the wall 26, and this structure is sufficiently applicable to the first and second embodiments. In addition to being excellent in economy, it is possible to reduce the embedding. It is a stool.

FIGS. 16 and 17 show a square steel pipe having a female pipe female joint 27 having a slit in a part of the joint, corresponding to the configuration of the reference example shown in FIGS. 10 and 11. This shows a steel sheet wall 29 by a sheet pile 28, and this configuration is similarly applicable to the first and second embodiments as well, and in this case, errors caused in construction are effectively reduced. There is an advantage that can be absorbed.

On the other hand, in each of the first and second embodiments,
For the hollow inside of the main body of each square steel sheet pile, the hollow inside of the main body of square steel pipe sheet pile including the jointless lower pile, and the inside of the cavity between the square steel sheet piles formed by the mutual connection of equal length double fitting joints In other words, since each can be easily filled with concrete, an extremely strong structural wall, that is, a hybrid honeycomb steel arrow wall can be formed.

Furthermore, since the honeycomb steel arrow wall according to each of the examples has a large degree of freedom in design, such as when forming a seawall, the wall surface of the honeycomb steel arrow wall may be formed into a mosaic-like unevenness,
In addition, it is possible to exhibit a function not seen in the conventional steel arrowhead of the same type, such as forming the top end in a stepped shape or reducing the reflected wave or obtaining a hydrophilic effect.

(Effects of the Invention) As described above in detail in each embodiment, according to the honeycomb steel sheet wall of the present invention, the cross section is a hollow hexagonal shape, and the axial length of the isometric length protrudes radially from the required ridge angle portion. Since the square steel pipe sheet pile provided with the double fittings is used, it is easy to sequentially connect the joints in two-dimensional directions obliquely in the vertical and horizontal directions, and the overall honeycomb wall has a correspondingly large wall thickness and extremely high rigidity. It becomes possible to construct a steel arrow wall having a shape configuration in a short construction period. In addition, a hexagonal hollow square steel pipe can be used as the square steel sheet pile, and in a state in which the individual equal-length double-fitting joints are connected as expected, one honeycomb is inserted between the square steel sheet piles. Since the cavity forming the part is formed, a balanced and structurally stable honeycomb steel arrow wall can be easily constructed. Furthermore, a half-section member of a straight steel sheet pile can be used as the isometric double-fitting joint. In this case, the fitting strength and watertightness are excellent, and the joint strength is remarkably high, very strong and extremely reliable. It is possible to form a highly honeycomb steel arrow wall.

And in the composition which mutually connected the square steel pipe sheet pile provided with the equal length twin fitting joint in all the ridge corners and two or more ridges,
Honeycomb steel arrow walls with few structural weaknesses can easily exhibit a honeycomb-like form balanced in a plane, and have no useless joint projections inside and outside (ends). Is obtained.

Further, since the isometric double fitting joint can be formed so as to protrude only in the upper half portion or a part of the upper half portion of the square steel sheet pile, there is an advantage that the expected function can be exhibited by economical design.

In addition, the configuration in which the jointless lower pile is connected to the lower part of the main body of the square steel pipe sheet pile enables construction that is economically appropriate even when a large depth is required.

Furthermore, with respect to the hollow interior of the main body of the square steel sheet pile, or the hollow interior of the main body of the square steel sheet pile including the jointless lower pile, and the inside of the cavity between the square steel sheet piles formed by coupling,
Since the concrete can be easily filled, it is possible to construct a very strong honeycomb steel arrow wall as a result with high rigidity.

[Brief description of the drawings]

FIGS. 1 and 2 are a plan view and a perspective view schematically showing a schematic structure of a honeycomb steel sheet wall to which a first embodiment of the present invention is applied, and FIGS. It is a plan view schematically showing the detailed structure of the square steel sheet pile,
FIG. 5 and FIG. 6 are plan explanatory views showing the details of the point at which the isometric double-fitting joints are projected in the radial direction from the respective corners of the square steel pipe sheet pile. 7 to 9 are plan views schematically showing the configuration of a square steel sheet pile having a hollow square cross section as a reference example to be compared with the first embodiment of the present invention. And FIG. 11 are a plan view and a perspective view schematically showing a schematic structure of a honeycomb steel sheet wall using a square steel pipe sheet pile as a reference example of the above. FIG. 12 is a perspective view schematically showing a schematic structure of a honeycomb steel arrowhead to which the second embodiment of the present invention is applied, and FIG.
It is a perspective view which shows typically the honeycomb steel sheet wall which used the square square steel pipe sheet pile as a reference example with respect to a 2nd embodiment same as the above. FIG. 14 and FIG. 15 are a plan view and a perspective view schematically showing a honeycomb steel sheet wall made of a square square steel sheet pile with the jointless lower pile joined in the reference example configuration of FIG. FIGS. 16 and 17 are schematic views of a steel sheet wall made of a square-shaped square pipe sheet pile having a female pipe female joint having a slit in a part of the joint in the reference example configuration of FIGS. 10 and 11. It is the top view and perspective view shown. 1,17 ... Honeycomb steel sheet pile, 2-4,14-16 ... Square steel sheet pile, 2a, 4a ... Square steel sheet pile body, 5a-5k ...... Equal length twin fitting joint, 6a-6f ... ... River, 7a-7f ... Vertical.

Claims (5)

(57) [Claims] 1. A plurality of square steel pipe sheet piles having a hollow hexagonal cross section and having equal length twin-fitting joints projecting radially from a required ridge at the center of the shaft are provided. A honeycomb steel sheet wall, wherein isometric double-fitting joints respectively corresponding to the square steel sheet piles are sequentially connected in a two-dimensional diagonal direction corresponding to a radial direction to form a honeycomb shape. 2. A combined use of a square steel sheet pile having an equal length double-fitting joint at the entire ridge and a square steel pipe sheet pile having an equal length double-fitting at two or more ridges. The honeycomb steel arrowhead according to claim (1), characterized in that: 3. The method according to claim 1, wherein each of the square steel sheet piles is provided with an isometric double-fitting joint in an upper half portion or a part of the upper half portion of the main body. Honeycomb steel arrow wall as described. 4. The square steel pipe sheet pile provided with each of the equal length twin-fitting joints is formed by joining a jointless lower pile at a lower portion. Honeycomb steel arrow walls described in Crab. 5. The hollow interior of each square steel sheet pile or the hollow interior of a square steel sheet pile including each joint-less lower pile, and the space between the square steel sheet piles formed by the mutual connection of equal length twin-fitting joints. The honeycomb steel arrow wall according to any one of claims (1) to (4), wherein concrete is filled into the cavity.