JPS639611Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a joint structure for concrete sheet piles that requires watertightness.

When constructing a wall by pouring concrete sheet piles while joining them together, it is necessary to keep the joints at the joining surfaces of the concrete sheet piles watertight, but various sheet pile joint structures have been conventionally provided for this purpose. ing.

1 to 3 show conventional joint structures. FIG. 1 shows longitudinal protrusions 2 and grooves 3 formed in opposing positions on the joining end surfaces of sheet piles 1 and 1', and hole-like voids 4 formed when the sheet piles 1 and 1' are joined together.
The grout solution is injected into the grout and allowed to harden.

In Figure 2, watertight metal fittings 6, 6' with their tips bent into a U shape are attached to the central part or both side edges of the joint end surfaces of sheet piles 1, 1'.
6' are connected to each other.

Moreover, the one shown in FIG. 3 has a structure in which a rubber rod 9 is interposed between the convex strip 7 and the groove 8 of the sheet piles 1, 1'.

However, in the case of the method in which the grout liquid is injected into the hole-like spaces 4 shown in FIG. It had the disadvantage that it was almost impossible to install it underwater. In addition, the watertight metal fittings 6, 6' shown in FIG.
In those using watertight metal fittings 6, 6', it is difficult to uniformly join the watertight fittings 6, 6' to each other in the direction of the joint, which causes problems in ensuring watertightness, and also has the disadvantage that durability is impaired due to rust, etc. Ta.

Furthermore, in the case where rubber rods are interposed as shown in Fig. 3, the fixation of the rubber rods 9 to the concrete sheet piles 1 and 1' is poor, and the sheet piles 1 and 1' in particular are driven into the ground with considerable impact force. Rubber stick 9 when driving
This had the disadvantage that the watertightness could not be maintained because the material separated from the sheet piles 1 and 1'.

In view of the above-mentioned shortcomings of the conventional joint structure, the purpose of this invention is to provide a watertight joint structure that is excellent in workability and watertightness, and can securely anchor concrete sheet piles to each other. The concrete sheet pile is formed by forming a longitudinally continuous protrusion on one joint end face and a groove that can freely engage with the protrusion on the other joint end face, and using a joint member. In a watertight joint structure of concrete sheet piles in which a plurality of concrete sheet piles are interposed and connected, the base part is made of a hard synthetic resin and the elastic joint part is made of an elastic synthetic resin that is integral with the base part, and the base part is connected to the elastic joint part. burying the base portion of the joint member continuously formed along the entire length in the convex strip;
A pair of guide members having buried reinforcing bars embedded inside the concrete sheet pile and located on both sides of the protruding strip part and protruding laterally from the one joint end surface, one of the guide members A plurality of concrete sheet piles are arranged in series by forming a bent portion at the tip and engaging the bent portion with a guide groove formed only on one side of the adjacent concrete sheet pile.

An embodiment of the present invention will be described below with reference to FIGS. 4 to 7.

In the figure, 10 is a concrete sheet pile, and one joint end surface 11a of the concrete sheet pile 10 is formed with a continuous convex strip 12 along its longitudinal direction.

The protrusions 12 are formed in different steps, with the lower part 12a being higher and the upper part 12b being lower from the center part.

Reference numeral 13 denotes a joint member, and the joint member 13 includes an elastic joint part 14 made of elastic synthetic resin and formed into a substantially cylindrical shape, and a hard synthetic resin integrally molded with the elastic joint part 14, as shown in FIG. It is formed from the base part 15 of.

The base portion 15 includes a substrate 16 formed continuously along the elastic joint portion 14 and embedded pieces 16a and 16b formed continuously along the substrate 16 and projected from the substrate 16.

When forming the concrete sheet pile 10, the joint member 13 formed in this way is embedded with the embedded pieces 16a, 16b of the base portion 15 within the upper side portion 12b of the convex strip portion 12 over the entire length, and the upper side portion 12b is It is fixed to the top of the.

In this case, the lower end portion 14a of the elastic joint portion 14 is buried within the lower portion 12a of the protruding strip portion 12.

A guide member 17 is embedded in a part of the lower part 12a of the concrete sheet pile 10.

As shown in FIG. 5, the guide member 17 is formed into a substantially U-shape by a top plate portion 18a and both side plate portions 18b and 18c bent from both sides of the top plate portion 18a. , 18c, buried reinforcing bars 19 are provided to protrude further rearward.

Furthermore, guide plates 20a and 20b that protrude further forward from the front plate part 18a are fixed to the outer wall surfaces of the side plate parts 18b and 18c, respectively.

The tip of one guide plate 20a is bent toward the other guide plate 20b to form a bent portion 20c.

The guide member 17 formed in this manner is exposed with its top plate portion 18a exposed to the joint end surface 11a of the concrete sheet pile 10, and its side plate portions 18b and 18c exposed to the side surfaces of the concrete sheet pile 10, and the buried reinforcing bars 19 are exposed. Concrete sheet pile 10
By embedding it inside the concrete sheet pile 10, the concrete sheet pile 10 is located on the lower side portion 12a side.

The bent portion 20 of the guide plate 20a is located only on one side of the concrete sheet pile 10 near the convex strip 12.
A guide groove 21 that can freely engage with the convex strip 12 is formed along the longitudinal direction of the concrete sheet pile 10, and a groove 22 that can freely engage with the convex strip 12 is formed on the other joint end surface 11b of the concrete sheet pile 10. .

The upper end 22a of the groove 22 is formed into a deep groove shape so that the protruding strip 12 can easily fit therein, and the lower end of the concrete sheet pile 10 is cut out diagonally to make it suitable for driving.

When constructing a wall using the concrete sheet piles 10 having the above-described configuration, the first stage concrete sheet piles 10 are fixed as shown in FIG.
The concave grooves 22 of the next concrete sheet pile 10' are made to correspond to the convex portions 12 of the first concrete sheet pile 10, and the guide grooves 21 are engaged with the bent portions 20c of the guide plates 20a of the first concrete sheet pile 10. In this state, concrete sheet pile 10' is driven into the ground.

Guide plates 20a and 20b are brought into sliding contact with both the front and back walls of the concrete sheet pile 10', and the bent portion 20c is engaged with the guide groove 21, so that the concrete sheet pile 10' can be driven accurately along the concrete sheet pile 10. It will be done.

Therefore, the joint member 13 fixed to the top of the convex strip 12 is reliably compressed over its entire length within the groove 22, and both concrete sheet piles 10, 10'
A continuous watertight joint structure will be formed between them.

In this way, the concrete sheet piles 10,
By driving concrete sheet piles 10, 10'... into the ground, a watertight joint structure is constructed by the joint members 13 between each concrete sheet pile 10, 10'....

As is clear from the above description, the watertight joint structure according to the present invention fixes the base part of the elastic joint member along the joint end surface of concrete sheet piles along the entire length, and extends the guide plate laterally from the joint end surface. It is constructed by joining each concrete sheet pile while protruding and engaging a bent part formed at the tip of one guide plate with a guide groove formed only on one side of the opposing concrete sheet pile. Therefore, the diameter of the joint member is uniformly reduced over its entire length between each joint end face, and it is firmly crimped to the adjacent concrete sheet pile, resulting in concrete with extremely excellent watertightness, adhesion, and workability. This provided a watertight joint structure for sheet piles.

[Brief explanation of the drawing]

Figures 1 to 3 are abbreviated cross-sectional views showing conventional watertight joint structures of concrete sheet piles, and Figures 4a and 4b each show an example of concrete sheet piles for configuring the watertight joint structure of the present invention. A perspective view showing,
Fig. 5 is a perspective view of a guide member fixed to a concrete sheet pile, Fig. 6 is a partially cutaway perspective view showing an embodiment of the watertight joint structure of the present invention, and Fig. 7 is a partially omitted joint member. FIG. 10, 10'... Concrete sheet pile, 11a,
11b...Joining end surface, 12...Convex strip, 12a...
... lower side part, 12b ... upper side part, 13 ... joint member, 14 ... elastic joint part, 15 ... base part, 20
a, 20b...Guide plate, 20C...Bending portion, 2
1... Guide groove, 22... Concave groove.

Claims (1)

[Scope of utility model registration request] Concrete sheet piles are formed with longitudinally continuous protrusions on one joint end surface and grooves that can freely engage with the protrusions on the other joint end surface, with joint members interposed. In a watertight joint structure of multiple concrete sheet piles connected in a row, the base part is made of a hard synthetic resin and the elastic joint part is made of an elastic synthetic resin that is integral with the base part. burying the base portion of the joint member formed continuously in the convex portion over the entire length;
A pair of guide members having buried reinforcing bars embedded inside the concrete sheet pile and located on both sides of the protruding strip part and protruding laterally from the one joint end surface, one of the guide members A concrete sheet pile characterized in that a plurality of concrete sheet piles are connected in series, with a bent part formed at the tip, and the bent part engaged with a guide groove formed only on one side of the adjacent concrete sheet pile. Watertight joint structure.