JPH0514224U - Steel plate concrete composite sheet pile - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose of the present invention is to obtain a sheet pile that has a low rusting rate for steel sheet piles, does not require a supporting member such as a tie rod, and has excellent water-stopping performance at the joint portion. . [Structure] A plurality of steel sheet piles 2, 2 ...
2a ... Are fitted and connected, and reinforcing bars 4, 4 ... Are arranged on the uneven portion of one side surface thereof, and concrete 5 is placed therein to be integrated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a steel sheet concrete composite sheet pile in which concrete is cast and integrated into a steel sheet pile.

[0002]

[Prior Art]

 Conventionally, the sheet pile method is generally used in the fields of port construction, river construction, earth retaining construction or foundation construction. As a material used in this method, steel sheet piles or concrete sheet piles are usually used.

[0003]

[Problems to be solved by the device]

 Rust occurs in the above-mentioned conventional steel sheet piles. In particular, the rusting rate is large on the ground surface and the water surface, so that the service life becomes short. Furthermore, it may be deformed by the earth pressure on the back side, so that it becomes necessary to support the opposite side with a tie rod.

Further, when the concrete sheet pile is used, it does not rust like the steel sheet pile, but since the water-stopping performance of the joint is extremely poor, the cost for preventing water-stopping is extremely high. There were defects such as Therefore, there will be technical problems that need to be solved in order to obtain a sheet pile that has a low rusting rate, does not require a supporting member such as a tie rod, and has excellent water stopping performance of the joint portion. The present invention aims to solve the problems.

[0005]

[Means for Solving the Problems]

 This invention has been proposed in order to achieve the above-mentioned object.A plurality of steel sheet piles are connected to each other through a joint portion, and a reinforcing bar is further provided on one side surface of the connected steel sheet piles. The steel sheet concrete composite sheet pile, which is characterized by being placed and poured into concrete, and the concrete that can be placed on one side of the steel sheet pile described above, has a wide bottom taper. It is intended to provide a steel sheet-concrete composite sheet pile characterized by being formed into a shape.

[0006]

[Action]

 The steel plate-concrete composite sheet pile of the present invention is formed by connecting a plurality of steel sheet piles through a joint, arranging a reinforcing bar on one side of the connected steel sheet piles, and placing concrete there to integrate them. Since the steel sheet pile is covered with concrete on the front side, it is not exposed to the air and is therefore unlikely to get rusted, and the earth pressure from the ground side is the same as the steel sheet pile. Even if it hits the concrete composite sheet pile, it is sufficiently supported by the concrete placed on the opposite side, and the steel concrete composite sheet pile is unlikely to be deformed. In particular, when the invention according to claim 2 in which the lower part of the concrete is widened and formed in a taper shape, the above-mentioned action is further promoted.

Further, compared to the conventional sheet pile, the number of joint portions is smaller, and since the construction is performed by connecting the joint portions at both ends of the steel sheet pile, the water stop processing is easy and the water stop performance is high. Becomes

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a partially cutaway oblique view of the whole, FIG. 2 is a cross-sectional plan view of FIG. 1, and FIGS. 3 and 4 are partially cutaway vertical sectional views for explaining the mutual relationship between a steel sheet pile and concrete. .. In the figure, 2 is a steel sheet pile. A plurality of the steel sheet piles 2 are fitted and connected to each other via the joint portion 2a at the edge thereof, and form a set. For example, the one shown in FIG. 2 has one steel sheet pile 2 in the center, and steel sheet piles 2 and 2 for each one are connected to the left and right sides thereof, respectively. That is, the joint portions 2a, 2a at both ends of the central steel sheet pile 2 and the respective joint portions 2a, 2a of the left and right steel sheet piles 2, 2 are fitted and coupled to each other, and the central steel sheet The recesses 2b of the sheet pile 2 are arranged on the side opposite to the natural ground 1, and the respective convex portions 2c, 2c of the steel sheet piles 2, 2 connected to the left and right are arranged on the side opposite to the natural ground 1.

Further, the dowels 3, 3, 3, 3 are welded to the front surface of the concave portion 2b of the steel sheet pile 2 in the central portion or the convex portions 2c, 2c of the left and right steel sheet piles 2, 2, and , Reinforcing bars 4, 4 ... are arranged on the uneven portion formed by the connection of the three steel sheet piles 2, 2, 2 and concrete 5 is cast on the entire uneven portion to make the steel. It is integrated with the sheet piles 2, 2, 2. Further, since the joint portions 2a, 2a at the respective end portions of the left and right steel sheet piles 2, 2 are coupled with the joint portions 2a, 2a of the steel sheet piles 2, 2 to be connected next, the concrete 5 The concrete 5 is provided with semicircular vertical grooves 5a, 5a for injecting grout material on both sides thereof. Thus, when one set of composite sheet piles W is completed, and when the set sheet pile is cast on the spot, another set of composite sheet piles W, W is joined to both sides of this. At this time, the semi-circular flutes 5a, 5a become circular flutes by overlapping with the semi-circular flutes 5a, 5a of the other pair of composite sheet piles W, W facing each other. The grout material is injected here to stop the joint water.

Further, as shown in FIGS. 3 and 4, the concrete 5 can be cast while covering the upper surface of the steel sheet pile 2 to make a decorative finish on the surface. Furthermore, in the composite sheet pile W shown in FIG. 4, the width M of the lower portion of the concrete 5 is larger than the width N of the upper portion thereof, and the surface T thereof is formed in a tapered shape. As described above, in the above-mentioned one embodiment, a plurality of steel sheet piles 2, 2 ... Is set as one set, and the dowel bars 3, 3 ... Are fixed to the back surface thereof by means of welding or the like. Since 4 ... are reinforced and concrete 5 is cast to be integrated with the steel sheet pile, the entire surface of the steel sheet piles 2, 2 ... Is buried in the concrete and therefore rusted. This will reduce the number. In particular, the device according to claim 2 does not need to be supported by a tie rod or the like, is a so-called self-supporting type, and can be joined by using the joint portions 2a, 2a ... Of the steel sheet piles 2, 2 ,. In addition, the water stopping effect is also great. Further, the steel sheet-concrete composite sheet pile W of the present invention is placed so that the steel sheet pile sides 2, 2 ... Are arranged on the ground 1 side. Thus, in the above-mentioned embodiment, the concrete 5 is cast over the entire length of the front face of the steel sheet piles 2, 2 ... Integrally, but the concrete 5 is not necessarily cast over the entire length. It is not necessary to extend the area, and the concrete 5 may be placed over the entire length up to the amount used by the moment of the root portion to form a composite.

The present invention can be modified in various ways without departing from the spirit of the invention, and it goes without saying that the invention extends to the modified version.

[0012]

[Effect of the device]

 This invention is a precast steel plate-concrete composite sheet pile in which a plurality of steel sheet piles are assembled and concrete is placed on the front surface of the steel sheet piles as described in detail in the above-mentioned embodiment. Since it is buried on the ground side, its surface is not exposed to the air, and therefore the rust rate is low. In addition, water resistance is improved because there are few joints. In particular, the device according to claim 2 is self-supporting and can withstand the back pressure from the ground side sufficiently, and has little deformation due to the back pressure. It is a device to play.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a pair of composite sheet piles of the present invention.

2 is a cross-sectional plan view of FIG.

FIG. 3 is a partially cutaway vertical side view showing a mutual relationship between a steel sheet pile and concrete.

FIG. 4 is a partially cutaway vertical side view of another embodiment showing the mutual relationship between a steel sheet pile and concrete.

[Explanation of symbols]

 1 Ground 2 Steel sheet pile 2a Joint part 3 Gibel reinforcement 4 Reinforcement 5 Concrete

Claims (2)

[Scope of utility model registration request] 1. A plurality of steel sheet piles are connected to each other through a joint portion, and a reinforcing bar is disposed on one side surface of the connected steel sheet piles, and concrete is poured and integrated. Steel sheet concrete composite sheet pile characterized by. 2. The steel sheet-concrete composite sheet pile according to claim 1, wherein the concrete to be cast on one side surface of the steel sheet pile is formed in a tapered shape with a wide lower portion.