JP4055844B2 - Watertight structure of concrete sheet pile - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water-tight structure of a concrete sheet pile that secures the water-tightness of a joint surface between adjacent concrete sheet piles when a plurality of concrete sheet piles widely used for a revetment, a sedimentation wall, and the like are installed in series.
[0002]
[Prior art]
Conventionally, there are several types of concrete sheet piles. For example, a type referred to as a flat shape, a groove shape, or a corrugated shape is well known due to its cross-sectional shape. Concrete sheet piles are widely used in various construction work as building materials for building riverside and bay bank revetments, earth retaining walls, as well as islands and water barriers.
[0003]
In order to drive such a concrete sheet pile into the ground, a frame F for positioning the concrete sheet pile 1 is first set up at the construction site, as illustrated in FIG. On the other hand, a vibro hammer H is attached to the upper end of the concrete sheet pile 1 and the vibro hammer H is suspended by a crane or the like, so that the concrete sheet pile 1 is in an upright posture. In this state, the concrete sheet pile 1 is dropped between the frames F, and the lower end of the concrete sheet pile 1 is pushed to the ground. Further, when ultrasonic vibration is applied to the concrete sheet pile 1 by the vibro hammer H, the concrete sheet pile 1 gradually sinks into the ground.
[0004]
The construction state of the concrete sheet pile 1 installed in the above procedure is shown in FIG. The figure shows a state in which two concrete sheet piles 1 are installed side by side as a horizontal section. Specifically, a joint joint material J is provided on the joint surface 10 of the concrete sheet pile 1. The joint joint material J is formed by extrusion of synthetic resin. The longitudinal direction of the joint joint material J coincides with the longitudinal direction (up and down in FIG. 5) of the concrete sheet pile 1. As shown in FIG. 6, the joint joint material J is engaged with each other to ensure watertightness between the adjacent concrete sheet piles 1.
[0005]
[Problems to be solved by the invention]
However, the concrete sheet pile 1 is originally driven straight into the ground in an upright position from the vertical direction. However, when the ground is soft or the like, the posture of the concrete sheet pile 1 is not stabilized in the process of driving, A gap between adjacent concrete sheet piles 1 may be greatly opened. Alternatively, the joint joint material J may be rubbed vigorously and the joint joint material J may be melted. In such a case, there arises a problem that the above water-tight effect cannot be sufficiently achieved.
[0006]
Then, the objective of this invention is providing the watertight structure of the concrete sheet pile which can hold | maintain the watertight effect between the concrete sheet piles adjacent to each other reliably.
[0007]
[Means for Solving the Problems]
The present invention relates to a watertight structure of joint surfaces between adjacent concrete sheet piles, each of which is formed by immersing into the joint surfaces of the concrete sheet piles, and has a curvature centered on the inside of the joint surface. a groove having a Jo inner surface, provided to protrude on the bonding surface of the concrete sheet pile together, the convex have a curved outer surface, the length protruding from the bonding surface, which is shorter than the maximum depth of the groove And a highly elastic sealing material provided on the outer surface of the ridge, and the inner surface of the groove and the ridge in a state in which the ridge is inserted into each groove of the concrete sheet piles. The high elastic sealing material is interposed in a gap between the outer surface of the first and second outer surfaces.
[0008]
Further, the present invention relates to a watertight structure of joint surfaces between adjacent concrete sheet piles, each formed by immersing into the joint surfaces of the concrete sheet piles, and defining a center of curvature inside the joint surface. A groove portion having a curved inner surface, a protrusion provided on the joint surface between the concrete sheet piles, and a ridge having a curved outer surface, and a highly elastic sealing material provided on the inner surface of the groove portion, The highly elastic sealing material is interposed in a gap between the inner surface of the groove and the outer surface of the ridge in a state where the ridge is inserted into the groove of each of the concrete sheet piles. .
[0009]
Furthermore, in the watertight structure of the concrete sheet pile according to the present invention, the groove and the ridge are made of a hard resin, and the high elastic sealing material is made of a high elastic soft resin. Furthermore, the watertight structure of the concrete sheet pile according to the present invention is such that a cavity filled with the concrete constituting the concrete sheet pile is formed inside the ridge.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
A watertight structure of a concrete sheet pile according to an embodiment of the present invention will be described with reference to FIGS. In the following, the same components as those in the conventional technology are denoted by the same reference numerals and the illustration thereof is omitted.
[0011]
As shown in FIG. 1, the joint joint material 2 of the concrete sheet pile 1 includes a groove portion 3 having a curved or substantially arc-shaped section, and a ridge 4 having a curved or substantially arc-shaped section and capable of being fitted into the groove portion 3. The high elastic sealing material 5 protruding from the outer surface of the ridge 4, the plurality of anchors 6 embedded in the joint surface 10 of the concrete sheet pile 1, and the contact surface 7 along the joint surface 10 are provided.
[0012]
In the drawing, two joint joint materials 2 that are paired in the same shape and opposite direction are shown, but these two joint joint materials 2 are obtained by inverting substantially the same members. That is, if one joint joint material 2 shown in a perspective view in FIG. 2 (a) is replaced so that the both ends in the longitudinal direction indicated by the arrow Y are opposite with the up-and-down direction thereof as the hook, This is equivalent to the other joint joint material 2 shown in FIG.
[0013]
The longitudinal direction indicated by the arrow Y coincides with the longitudinal direction of the concrete sheet pile 1 shown in FIG. That is, if the longitudinal direction of the concrete sheet pile 1 pointed by the arrow Y substantially coincides with the vertical direction at the time of construction, for example, the cross sections of the joint joint material 2 shown in FIG. 1 and FIG. It is the shape in the cut | interruption which crossed the joint joint material 2 in the horizontal direction, respectively.
[0014]
Although the manufacturing method of the joint joint material 2 is not limited, It is desirable to manufacture the joint joint material 2 as a sash bar obtained by extrusion molding of a synthetic resin or a metal. In this case, a material for the joint joint material 2 is preferably a material that hardly causes so-called galling or biting and hardly causes cracks. More preferably, vinyl chloride is applied. In particular, it is desirable that the grooves 3 and the ridges 4 are made of hard vinyl chloride, and the high elastic sealing material 5 is made of high elastic soft vinyl chloride.
[0015]
As shown in FIG. 1, with the joint surfaces 10 of the adjacent concrete sheet piles 1 facing each other, the groove portion 3 of one joint joint material 2 corresponds to the ridge 4 of the other joint joint material 2. Has been placed. The center of curvature O of the groove 3 is located inward of the joint surface 10. As is apparent from the drawing, this inward refers to a position that enters the interior of the concrete sheet pile 1 rather than the joint surface 10. Since the protrusion 4 protrudes from the joint surface 10 and the concrete constituting the concrete sheet pile 1 is filled in the cavity inside, the protrusion 4 has high rigidity.
[0016]
The groove opening of the groove portion 3 of one joint joint material 2 is open toward the convex strip 4 of the other joint joint material 2, but the side portion of the convex strip 4 projects closer to the groove portion 3. This is because, as shown in FIG. 3, the groove 3 and the protrusion 4 are separated from each other in a state in which the protrusion 4 of the other joint joint material 2 is once inserted into the groove 3 of the joint joint material 2. This is to regulate the above.
[0017]
That is, in the state shown in FIG. 3, the side surfaces of the ridges 4 of both joint joint materials 2 bite each other, and these ridges 4 are made of hard vinyl chloride and inside thereof. As described above, since the concrete constituting the concrete sheet pile 1 is filled, it hardly deforms elastically. For this reason, once the protrusions 4 are inserted into the respective groove portions 3 of both joint joint materials 2, they are not easily detached.
[0018]
The highly elastic sealing material 5 is a hollow tube having a substantially circular cross section formed integrally with the joint joint material 2, and the longitudinal direction thereof is along the longitudinal direction of the ridges 4. When the protrusion 4 of the other joint joint material 2 is fitted into the groove portion 3 of one joint joint material 2, the highly elastic sealing material 5 is pressed against the inner surface of the groove portion 3 and crushed. The highly elastic sealing material 5 crushed between the groove 3 and the ridge 4 is placed in a gap between the tip of the ridge 4 formed slightly flat and the inner surface of the groove 3. In this state, since the high elastic sealing materials 5 of the joint joint materials 2 are in close contact with the inner surfaces of the groove portions 3, the joint surfaces 10 between the adjacent concrete sheet piles 1 are brought together by these two close contact portions. Can be reliably achieved.
[0019]
In addition to the fact that the groove 3 and the ridge 4 have a substantially arcuate cross-sectional shape, and a slight gap is provided between the groove 3 and the ridge 4, the arrow R in FIG. As pointed out above, even if the groove 3 of the other joint joint material 2 rotates around the ridge 4 of one joint joint material 2, the highly elastic sealing material 5 is inscribed in the groove 3 and the groove 3 Can slide along the inner surface.
[0020]
Therefore, for example, when the concrete sheet piles 1 are driven into the ground, the adjacent concrete sheet piles 1 are relatively displaced in the direction indicated by the arrow R, that is, the adjacent concrete sheet piles 1 are inclined to each other. Since the highly elastic sealing material 5 is not separated from the groove portion 3, the watertightness of the joint surface 10 between the adjacent concrete sheet piles 1 can be reliably maintained.
[0021]
Further, even when the joint surfaces 10 between the adjacent concrete sheet piles 1 are slightly too close, since the highly elastic sealing material 5 is interposed between the groove 3 and the ridge 4, the groove 3 and the ridge 4 are directly connected. Will not be rubbed hard. Even if these joining surfaces 10 come into contact with each other with a stronger force, the length of the protrusion 4 protruding from the contact surface 7 along the joining surface 10 is set to be slightly shorter than the maximum depth of the groove 3. Therefore, the contact surfaces 7 of the joint joint materials 2 are in contact with each other, and the high-elastic seal material 5 is not strongly pressed against the groove portion 3 beyond this. For this reason, the watertightness of the joint surface 10 between the adjacent concrete sheet piles 1 can be stably achieved.
[0022]
As shown in FIG. 4 (a), a plurality of high elastic sealing materials 5 may be formed on the convex stripes 4. Alternatively, as shown in FIG. The elastic sealing material 5 may be formed on the inner surface of the groove 3.
[0023]
The watertight structure of the concrete sheet pile according to this embodiment illustrated above should not be construed as substantially limiting the technical idea of the present invention. The present invention can be carried out without departing from the gist of the present invention, with appropriate improvements, changes or additions based on the ingenuity and ingenuity of those skilled in the art.
[0024]
【The invention's effect】
According to the watertight structure of the concrete sheet pile according to the present invention, when the convex line of the other joint joint material is inserted into the groove part of one joint joint material, the highly elastic sealing material is pressed against the inner surface of the groove part and crushed. Since the crushed highly elastic sealing material is in close contact with the inner surface of the groove portion, it is possible to reliably achieve water-tightness at the joint surface between adjacent concrete sheet piles.
[0025]
In addition, since the cross-sectional shape of each of the groove portion and the ridge is curved, even if the groove portion of the other joint joint material rotates around the ridge of one joint joint material, the highly elastic sealing material is It can slide along the inner surface of the groove portion while inscribed in the groove portion. Therefore, for example, when the concrete sheet pile is driven into the ground, even if the adjacent concrete sheet piles are relatively inclined, the highly elastic sealing material does not leave the groove portion, so that the water tightness of the joint surface between the adjacent concrete sheet piles is ensured. Can be retained.
[0026]
Therefore, even if the joint joint material of the concrete sheet pile buried in the ground cannot be directly visually inspected by the installer, water or the like does not pass between the adjacent concrete sheet piles, Construction reliability can be improved.
[0027]
In addition, even when the joint surfaces of adjacent concrete sheet piles are too close, the highly elastic sealing material is interposed between the groove and the ridge, so that the groove and the ridge are not directly rubbed strongly. . Therefore, there is no fear that the joint joint material is thermally melted as in the prior art, thereby preventing the problem that the watertightness of the joint surface between the adjacent concrete sheet piles is impaired.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a joint joint material provided on a joint surface of a concrete sheet pile according to an embodiment of the present invention.
FIG. 2 is a perspective view of a joint joint material according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view showing a watertight structure of a concrete sheet pile according to an embodiment of the present invention.
FIG. 4 is a cross-sectional view of a modification of the joint joint material provided on the joint surface of the concrete sheet pile according to the embodiment of the present invention.
FIG. 5 is a perspective view showing a construction situation of a conventional concrete sheet pile.
FIG. 6 is a cross-sectional view showing a conventional watertight structure between concrete sheet piles.
[Explanation of symbols]
1: Concrete sheet pile 2: Joint joint material 3: Groove part 4: Projection 5: High elastic sealing material 6: Anchor 10: Joining end face

Claims (4)

It is a watertight structure of the joint surface between adjacent concrete sheet piles,
A groove portion having a curved inner surface formed by immersing each in the joint surface between the concrete sheet piles, and defining a center of curvature inside the joint surface;
Protrudes respectively to the bonding surface of the concrete sheet pile together, have a curved outer surface, a ridge lengths projecting from said joint plane, which is shorter than the maximum depth of the groove,
A highly elastic sealing material provided on the outer surface of the ridge,
The highly elastic sealing material is interposed in a gap between the inner surface of the groove and the outer surface of the ridge in a state where the ridge is inserted into the groove of each of the concrete sheet piles. Watertight structure of concrete sheet pile. It is a watertight structure of the joint surface between adjacent concrete sheet piles,
A groove portion having a curved inner surface formed by immersing each in the joint surface between the concrete sheet piles, and defining a center of curvature inside the joint surface;
Protruding strips provided on the joint surfaces of the concrete sheet piles, each having a curved outer surface,
A highly elastic sealing material provided on the inner surface of the groove,
The highly elastic sealing material is interposed in a gap between the inner surface of the groove and the outer surface of the ridge in a state where the ridge is inserted into the groove of each of the concrete sheet piles. Watertight structure of concrete sheet pile.   The watertight structure of a concrete sheet pile according to claim 1 or 2, wherein the groove and the ridge are made of a hard resin, and the high elastic sealing material is made of a high elastic soft resin. Wherein the inner ridge, watertight concrete sheet pile according to any one of claims 1-3 which forms a cavity for filling the concrete constituting the concrete sheet pile.

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