JP2018178641A - Tide embankment panel, tide embankment and construction method of tide embankment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a construction period by making attachment of tide embankment panels to a foundation portion of a tide embankment efficient.SOLUTION: A tide embankment panels 20 comprises: a panel body 21 receiving waves; and a plurality of connection members 22 a part of which is buried in a lower part of the panel body 21 and the remainder of which is provided so as to downwardly protrude out of a lower end of the panel body 21. A through-hole 24 is formed, in the part where the connection members 22 of the panel body 21 are buried, which penetrates from one end to the other end in a width direction W of the panel body 21 and into which coupling members 23 coupling the adjacent connection members 22 are inserted.SELECTED DRAWING: Figure 1

Description

  The present invention is installed along a coastline, a seawall for preventing revetment of seawalls and inundation of seawater upon landslides caused by tsunamis and typhoons during earthquakes, seawalls used for the seawalls and seawalls It is about the bank construction method.

  In Japan, minimizing the damage caused by a large earthquake is a pressing issue. Also, in recent years, it has been pointed out that the typhoon has become more intense due to global warming, and the high wave damage caused by the typhoon is becoming more serious. Seawalls installed along the coast against these natural disasters are expected as a means to prevent coastal erosion and inundation of seawater inland.

  As a conventional seawall, Japanese Patent Application Laid-Open No. 2008-101501 is constructed by inserting a lower portion of a connected steel pipe into a hollow portion of a pile head, filling mortars inward and fixing them, and fixing the upper portion of the connected steel pipe in footing concrete. The embankment is disclosed. In addition, in Japanese Patent Application Laid-Open No. 2008-112501, a welded steel pipe is fixed to the head of a PHC pile, a column base of a steel column embedded in a footing is inserted into the welded steel pipe, and concrete is filled in the welded steel pipe. The embankment is disclosed.

Japanese Patent Laid-Open No. 2000-27197 Japanese Patent Application Publication No. 2007-100337

  The extension distance of the coastline of Japan surrounded by the ocean is huge, and the construction depends on the weather, so the construction and maintenance of the seawall requires a large cost and construction period, and the efficiency of the construction Has been called for. However, in the seawall of Patent Document 1, since the step of fixing the lower portion of the jointed steel pipe to the pile head and the step of fixing the upper portion of the jointed steel pipe to the footing are different steps, time for building the seawall And the construction period was prolonged. Also in the seawall of Patent Document 2, the step of fixing the joint steel pipe to the head of the PHC pile and the column base of the steel column embedded in the footing are inserted into the joint steel pipe to fill the joint steel pipe with concrete. And the construction period has been prolonged.

  A so-called precast panel type seawall is one of the seawalls that solves such problems. A precast panel type seawall is manufactured in advance by a factory etc. on a seawall panel in which a part of a connecting member such as H steel is embedded, and the connecting member protruding from the lower end of the seawall is a pile installed on the shoreline. It is built by fixing. The precast panel type seawall has excellent merits such as shortening of construction period and easy replacement of the seawall panel which has a problem at the time of maintenance.

  On the other hand, in the case of constructing a structure on a pile such as a steel pipe pile or a steel pipe sheet pile, it is necessary to carry out concrete placing processing (coping) in which the heads of adjacent piles are caught. Since coping may involve the work of setting up and dismantling the formwork, there was a problem that the construction period was prolonged.

  This invention is made in view of the said situation, and it aims at making efficient attachment of the seawall panel to a seawall foundation part, and shortening a construction period.

  The present invention for solving the above problems is a seawall panel used for a seawall, wherein a panel main body receiving a wave, a part thereof is embedded in the lower part of the panel main body, and the remaining part is from the lower end of the panel main body And a plurality of connecting members provided to project downward, in a portion of the panel body where the connecting member is embedded, from one end to the other end in the width direction of the panel body It is characterized in that a through hole is formed through which a connecting member for connecting the adjacent connecting members is inserted.

  The present invention according to another aspect is a seawall, and a plurality of the above seawall panels fixed to a base portion, and fixed on the base portion such that the end surfaces in the width direction are in contact with each other. A connecting member for connecting the adjacent connecting members of the seawall panel, wherein the connecting member is inserted into the through hole of the seawall panel so as to straddle the widthwise end face of the adjacent seawall panel And the connection member and the seawall panel are fixed.

  Moreover, the present invention according to another aspect is a method of constructing a seawall, wherein a base portion is installed, and when arranging a plurality of seawall panels according to claim 1 on the base portion, each other. The seawall panels are arranged so that the end face in the width direction is in contact, and the positions of the through holes of the adjacent seawall panels are aligned, and the base portion and the seawall panel are fixed. The seawall is connected by inserting a connecting member for connecting the adjacent connecting members into the through hole so as to straddle the end face in the width direction of the adjacent seawall panel and fixing the connecting member and the seawall panel. It is characterized by building.

  When the seawall panel according to the present invention is used, the adjacent seawall is fixed by fixing the connection member to the seawall panel while inserting the connection member so as to pass through the through holes of the adjacent seawall panel. Panels can be connected. That is, adjacent seawall panels can be connected without performing coping.

  ADVANTAGE OF THE INVENTION According to this invention, attachment of the seawall panel to a seawall foundation part can be made efficient, and a construction period can be shortened.

It is a front view showing a schematic structure of a seawall according to an embodiment of the present invention. It is AA sectional drawing in FIG. It is BB sectional drawing in FIG. It is a side view showing a connecting member concerning an embodiment of the present invention. It is a figure which shows an example of a connection member. It is a figure which shows an example of a base part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present specification and the drawings, elements having substantially the same functional configuration will be assigned the same reference numerals and redundant description will be omitted.

  As shown in FIGS. 1 to 3, the seawall 1 in the present embodiment includes a plurality of steel pipe sheet piles 2 as foundations installed along a shoreline and a plurality of end faces in the width direction W being in contact with each other. And the seawall panel 20 of the The "coastline" in the present specification also includes riverbanks into which seawater enters.

  The seawall panel 20 is a precast concrete in which a connection member 22 for connecting the steel pipe sheet pile 2 and the panel main body 21 is embedded in the lower part of the substantially rectangular parallelepiped panel main body 21. The longitudinal direction of the panel main body 21 is directed in the vertical direction, and the panel main body 21 has a concrete structure reinforced by providing one or both of a reinforcing bar and a steel material inside.

  A plurality of connection members 22 are provided along the width direction W of the panel main body 21. A portion of the connection members 22 is embedded in the lower portion of the panel main body 21, and the remaining portion protrudes downward from the lower end of the panel main body 21. . In the present embodiment, three connection members 22 are provided for one seawall panel 20. The connection members 22 are embedded in the panel main body 21 at regular intervals in accordance with the installation intervals of the steel pipe sheet piles 2. In the following description, a portion of the connection member 22 which protrudes downward from the lower end of the panel main body 21 is referred to as a “connection member projection 22 a”. In the present embodiment, H steel is used as the connection member 22, and the connection member 22 is disposed in such a direction that the flange surface is parallel to the wave receiving surface of the panel body 21. The connection member projection 22a of the connection member 22 is inserted into the hollow portion of the steel pipe sheet pile 2, and the gap between the connection member projection 22a and the inside of the steel pipe sheet 2 is filled with concrete 3, thereby making the steel pipe The sheet pile 2 and the seawall panel 20 are fixed. The connecting member 22 is not limited to H steel, and may be another columnar member such as a steel pipe or a flat plate, or a member having another shape. That is, the connection member 22 is not particularly limited as long as it is a member which can be embedded in the panel main body 21 so that a part thereof is present inside the panel main body 21 and the remaining part protrudes downward from the lower end of the panel main body 21.

  In the seawall panel 20 of the present embodiment, in the portion of the panel main body 21 in which the connection member 22 is embedded, the through holes 24 penetrating from one end to the other end in the width direction W of the panel main body 21 are formed. It is done. The through hole 24 also penetrates the connecting member 22 as shown in FIG. In addition, illustration of the below-mentioned connection member 23 is abbreviate | omitted in FIG. The method of forming the through holes 24 is not particularly limited. For example, in the step of manufacturing precast concrete consisting of the panel main body 21 and the connecting member 22, the side of the connecting member 22 (in the embodiment, the H steel web) is penetrated in advance. A hole 24a (FIG. 2) is formed, and a core is used so that a hollow portion 24b (FIG. 3) is formed at the same position as the position of the through hole 24 of the connection member 22 in concrete placement. And the through-hole 24 as the seawall panel 20 is formed of the hollow part 24b of the panel main body 21 and the through-hole 24a of the connection member 22 which were formed here. The positions of the through holes 24 with respect to the panel main body 21 are such that the through holes 24 of the adjacent seawall panels 20 are continuous through holes 24 formed in the plurality of seawall panels 20 respectively. Are formed at the same position.

  Columnar connection members 23 are inserted into the through holes 24 of the seawall panel 20. As shown in FIG. 4, in this embodiment, an assembled rebar in which a straight rebar and a rebar bent in a square shape are combined is used as the connecting member 23. The connecting member 23 is not limited to the assembled reinforcing bar, and may be, for example, another column-shaped member such as I-shaped steel or H-shaped steel as shown in FIG. 5 or a member of other shape. That is, the connecting member 23 is not particularly limited as long as it can be inserted into the through hole 24 of the seawall panel 20. The concrete 3 is filled in the inside of the through-hole 24 in which the connection member 23 was inserted, and, thereby, the connection member 23 and the seawall panel 20 are fixed.

  The seawall 1 of this embodiment is configured as described above. The construction method of this seawall 1 is as follows.

(Basic work)
First, a plurality of steel pipe sheet piles 2 are driven into the ground along the coastline as foundation work of the beach where the seawall 1 is installed. The method for driving the steel pipe sheet pile 2 into the ground is not particularly limited.

(Installation of seawall panel 20)
Next, the connection member protrusion 22a of the seawall panel 20 is inserted into the hollow portion of the steel pipe sheet pile 2, and the seawall panel 20 is placed on the steel pipe sheet 2 so that the width direction end faces of the seawall panel 20 contact each other. I will leave it. At this time, each seawall panel 20 is arrange | positioned so that the position of each through-hole 24 of the adjacent seawall panel 20 may align. Then, concrete 3 is filled in the gap between the connection member protrusion 22 a of the seawall panel 20 and the inner side of the steel pipe sheet pile 2, and the seawall panel 20 and the steel pipe sheet pile 2 are fixed.

(Connection of seawall panel 20)
Subsequently, the connecting member 23 is inserted so as to pass through each through hole 24 of the adjacent seawall panel 20. Thereafter, the inside of the through hole 24 is filled with concrete 3 to fix the connection member 23 and the seawall panel 20. At this time, since the connecting member 23 is fixed so as to straddle the adjacent seawall panel 20, the adjacent connecting members 22 are connected by the connecting member 23, and the adjacent seawall panel 20 is connected. It will be Thus, the seawall 1 is constructed.

  That is, in the seawall 1 of this embodiment, since the adjacent seawall panel 20 can be connected by the connection member 23 inserted in the through hole 24, the head of the steel pipe sheet pile 2 is constructed when constructing the seawall 1. It becomes unnecessary to carry out coping of the department. As a result, installation work and dismantling work of the formwork at the time of carrying out coping can be omitted, and it becomes possible to shorten the construction period required for construction of the seawall 1. Moreover, since the seawall 1 is a structure fixed across the seawall panel 20 which the connection member 23 adjoins, it has the intensity | strength which can endure the shaking of the earthquake which generate | occur | produces before a tsunami arrives. For this reason, it is hard to occur the fall of wave resistance with the destruction of the seawall at the time of an earthquake occurrence, and can show the wave resistance which the seawall 1 originally has with respect to the tsunami reached after the earthquake. Moreover, in the seawall 1 like this embodiment, since the seawall 1 can be constructed without providing a footing, it becomes possible to shorten a construction period significantly.

  In addition, the structure of the seawall 1 is not limited to what was demonstrated by this embodiment. For example, although the seawall 1 of the structure which connected the three seawall panels 20 by one connection member 23 was illustrated in this embodiment, the several seawall panels 20 of the seawall 1 further add the steel pipe sheet pile 2 one by one normally. Since it is constructed by being fixed on top, a plurality of connecting members 23 will also be used. In such a case, the connecting members 23 are sequentially inserted into the through holes 24 of the respective seawall panels 20, but at this time, the connecting members 23 straddle the end surface in the width direction of the adjacent seawall panels 20. If it is not inserted, the adjacent seawall panels 20 will not be connected at that point. Therefore, in order to connect the adjacent seawall panels 20, it is necessary for the connecting member 23 to have the through holes 24 inserted so as to straddle the width direction end face of the adjacent seawall panels 20.

  Further, in the present embodiment, although one through hole 24 is provided in the seawall panel 20, a plurality of through holes 24 may be provided. In this case, the connection of each seawall panel can be further strengthened by inserting and fixing the connecting member 23 in each through hole 24, and the wave resistance can be improved.

  Further, in the present embodiment, the concrete 3 is filled in the gap between the steel pipe sheet pile 2 and the connecting member protrusion 22a of the seawall panel 20 to fix the steel pipe sheet pile 2 and the seawall panel 20, but concrete Instead of 3, mortar may be used. Similarly, the space between the connecting member 23 and the through hole 24 may be filled with mortar to fix the connecting member 23 and the seawall panel 20.

  Moreover, the fixing method of the steel pipe sheet pile 2 and the seawall panel 20 is not specifically limited, As long as the seawall panel 20 can be fixed to the upper part of the steel pipe sheet pile 2, another fixing method may be used. Similarly, the method of fixing the connection member 23 inserted into the through hole 24 to the seawall panel 20 is not particularly limited, either, and the connection member 23 is inserted into the through hole 24 so as to straddle the width direction end face of the adjacent seawall panel 20 As long as the connection member 23 and the seawall panel 20 can be fixed in the inserted state, another fixing method may be used.

  Moreover, although it decided to use the steel pipe sheet pile 2 as a foundation part of the seawall 1 in this embodiment, the structure of a foundation part is not specifically limited, It is the steel pipe pile 2a installed with intervals as shown in FIG. The basic part may be configured.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this example. It is apparent that those skilled in the art can conceive of various changes or modifications within the scope of the technical idea described in the claims, and the technical scope of the present invention is also natural for them. It is understood to belong to

  The present invention is useful as a seawall installed along a shoreline. Moreover, since it is possible to function as a retaining wall, it can also be used as a retaining wall and a seawall.

DESCRIPTION OF SYMBOLS 1 seawall 2 steel pipe sheet pile 2a steel pipe pile 3 concrete 20 seawall wall panel 21 panel main body 22 connection member 22a connection member protrusion 23 connection member 24 through hole 24a through hole 24b of connection member cavity width W of panel body width direction

Claims (7)

A seawall panel used for seawalls,
Panel body to receive the waves,
A plurality of connecting members partially embedded in the lower portion of the panel body and provided such that the remaining portion protrudes downward from the lower end of the panel body,
In a portion of the panel body in which the connection member is embedded, a penetration is made from one end in the width direction of the panel body to the other end, and a penetration is inserted into which a connection member connecting adjacent connection members is inserted A seawall panel characterized in that a hole is formed. The base department,
A plurality of the seawalls according to claim 1, which are fixed on the base portion and arranged such that the width direction end faces are in contact with each other.
And a connecting member for connecting the adjacent connecting members of the seawall panel;
The connection member and the seawall panel are fixed in a state where the connection member is inserted into the through hole of the seawall panel so as to straddle the width direction end face of the adjacent seawall panel. A seawall that features.   The connection member and the seawall panel are fixed by inserting the connection member into the through hole and filling the inside of the through hole with concrete or mortar. Seawall described in 2.   The seawall according to claim 2 or 3, wherein the foundation portion is a plurality of steel pipe sheet piles driven into the ground. Set up the foundation,
When arranging a plurality of seawall panels according to claim 1 on the foundation portion, the end surfaces in the width direction are in contact with each other, and the positions of the through holes of the adjacent seawall panels are aligned Arrange each seawall panel to fix the foundation and the seawall panel,
The connection member connecting the adjacent connection members of the seawall panel is inserted into the through hole so as to straddle the width direction end face of the adjacent seawall panel, and the connection member and the seawall panel are fixed. A method of constructing a seawall, characterized in that the seawall is constructed.   The connection member and the seawall panel are fixed by inserting the connection member into the through hole and filling the inside of the through hole with concrete or mortar. How to build a seawall.   The said foundation part is several steel pipe sheet pile driven into the earth, The seawall construction method of Claim 5 or 6 characterized by the above-mentioned.

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