JPH0663226B2 - Pile wall having waterproofing member and waterproof structure, and method for implementing the pile wall - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a pile wall having a water blocking structure, a water blocking member used for this pile wall, and a construction method for making the pile wall a water blocking structure. .

(Prior Art) Pile walls constructed of steel sheet piles are used for revetment, earth retaining, etc., but it is required to ensure water stoppage. In order to stop this water, it is effective to perform some treatment on the joint portion of the pile where water leakage occurs, and devices and inventions focusing on this point have been conventionally made.

Among them, Japanese Utility Model Publication No. 64-432 proposes a device in which a water-swelling sealing material is fixed along a joint portion of a pile by a support plate, and the water swelling is caused at the joint portion on the excavation side of the pile row. A watertight sealing material is applied to stop water leaking to the excavation side.

JP-A-56-12424 and JP-A-1-28012
The inventions described in Japanese Patent No. 1 and Japanese Patent Publication No. 1-280122 seal a joint portion of a pile with a waterproof material, and a steel material that covers the joint portion of the pile is attached to the pile to provide a waterproof material in the steel material. Or the joint portion of the pile is formed so as to have a special shape having a space, and the water blocking material is injected into the space portion.

(Problem to be Solved by the Invention) However, the former conventional technique is such that when the water swellable sealing material is provided on the excavation side of the pile row, earth pressure or water pressure on the opposite side to the excavation side acts from the gap of the joint part, The degree of adhesion of the sealing material with respect to the part decreases, or the sealing material separates from the joint part. Therefore, there is a fatal problem that the water blocking effect is lost.

On the other hand, in the latter conventional technology, it is necessary to attach steel material to the pile so as to fill the waterproof material, and to form the joint part of the pile into a special shape, so work for this is required and The pile cannot be used for any purpose other than the above, and there is no diversion.

In addition, when filling the waterproof material, it is necessary to discharge the steel material and the inside of the joint with high-pressure water, which not only reduces workability but also may not reliably discharge the earth. The effect is partially reduced. Further, when a steel material is attached, the resistance at the time of driving the pile increases, which may cause the pile to fall forward.

The present invention has been made in view of these problems of the prior art, and a pile that can be easily constructed without changing the original shape of the pile with a structure having a sufficient waterproofing force. Intended to provide a wall. Another object of the present invention is to provide a water blocking member used for construction of this pile wall and a method of constructing a pile wall using this water blocking member.

(Means for Solving the Problem) A water blocking member according to the present invention includes a leading tip formed into a shape that can be fitted into a joint portion of a pile, and a water blocking material connected to the leading tip. , Characterized in that the leading tip is pushed into the joint of the existing pile in the connected state of the water blocking material, and the pile wall according to the present invention is a leading tip formed in a shape that can be fitted in the joint portion of the pile. , A ground having a water blocking material connected to the leading tip, and a pile provided with a water blocking member for pushing the leading tip into the joint of the existing pile in a connected state of the water blocking material, and the ground on the opposite side to the excavating side On the outside of the pile column joint,
It is characterized by having a water blocking structure provided with a water blocking material along the longitudinal direction of the joint portion, further, the method of constructing a pile wall according to the present invention is a lead formed into a shape that can be fitted in the joint portion of the pile. Insert the tip into the joint part of the existing pile, then fit the joint part of the next pile into the joint part of the existing pile, push the leading chip into the joint part of the existing pile by this next pile driving, and move it. Following the movement, a water blocking material along the joint is applied to the outside of the joint.

(Operation) In the pile wall with the above configuration, since the waterproof material is provided on the ground side opposite to the excavation side, when the earth pressure or water pressure of the ground acts, the waterproof material comes into close contact with the joint part of the pile and Grows larger.

Further, when the leading tip is pushed into the joint portion of the existing pile, the water blocking member configured as described above acts to dispose the water blocking material along the joint portion while discharging the soil in the joint portion.

Furthermore, the method of constructing the pile wall with the above-mentioned configuration is such that the leading tip is pushed into the joint portion of the existing pile along with the press-fitting or placing of the next pile, and the waterproofing material is attached to the joint portion following this pushing movement. Since it is applied along the line, it is possible to construct a pile wall with a waterproofing force applied to the pile without requiring a design change of the pile.

(Embodiment) FIG. 1 shows a first embodiment of the water blocking member 1, which has a leading tip 2 and a water blocking member 3. Upper part 2a of the leading tip 2
Is molded to the same shape and size as the inner surface of the joint part of the pile,
It is fitted and pushed into the joint part of the pile. Further, the lower portion 2b of the leading tip 2 has a pointed shape by forming a taper surface inclined in one direction. Thus the lower part 2b
Since the pegs are formed into a pointed shape, the sand in the joint portion of the pile is discharged, the resistance of the joint portion is reduced, and the pushing movement in the joint portion is facilitated.

The water blocking material 3 is connected to one side of the leading tip 2. FIG. 2 shows an example of this water blocking material 3, which is constructed by inserting a core material such as a wire or rope into the water swellable sealing material 5. The water-swellable sealing material 5 has a property of absorbing water and swelling, and exhibits a water-stopping effect by this swelling. The water blocking material 3 is connected to the leading tip 2 and moves along the joint portion following the pushing movement of the leading tip 2 in the joint portion of the pile.

As shown in FIG. 1, the connection of the water blocking material 3 in this embodiment is provided with a connection pipe 6 extending upward on one side of the upper part of the leading tip 2 and the water blocking material 3 is inserted into the connection pipe 6. ,
It is done by caulking. The water blocking material 3 is not limited to the water swelling sealing material as long as it can be deformed by the action of earth pressure or water pressure from the ground, and may be an elastic body such as rubber.

Further, the water-stopping material in the present invention is not limited to the one having the water-stopping ability by itself as described above.
As shown in the figure, it includes an injection pipe 8 for injecting grout agent into the ground along the joint portion, and in the case of the injection pipe 8, it can be connected by welding with the leading tip 2.

The water blocking material 3 is connected to the leading tip 2 so as to be located outside the joint portion of the pile. FIG. 3 shows the connection position of the water blocking material 3 to the leading tip 2, and the joint portion (grip) 10 g of the existing pile 10 and the joint portion (grip) of the next pile 11 are shown.
It is connected so as to be outside the fitting position with 11g.

Next, a method of constructing a pile wall according to this embodiment will be described.

First, a pile such as a steel sheet pile is driven into the ground to form the existing pile 10. As shown in FIG. 3, the leading tip 2 is fitted in the joint portion 10g of the existing pile 10. In this case, since the leading tip 2 has a shape that fits into the joint portion 10g of the existing pile 10, it can be easily fitted.

Next, the joint portion 1 of the existing pile 10 is connected to the joint portion 10g of the existing pile 10.
1 g is fitted and the next pile 11 is driven. As a result, the next pile 11 enters the ground in a state where the joint portions 10g and 11g are connected to each other, but the leading tip 2 is inserted into the joint portion 10g of the existing pile 10.
, The leading tip 2 gradually pushes into the joint 10g and moves, as shown in FIG. By this pushing movement, the leading tip 2 discharges the earth and sand in the joint portion 10g, so that the resistance acting on the joint portion 11g of the next pile 11 is reduced, and the next pile 11 smoothly enters the ground.

When the driving of the next pile 11 is completed, the leading tip 2
Reaches the lower end of the joint portion 10g of the existing pile 10. Since the water blocking material 3 is connected to the leading tip 2, when the leading tip 2 is pushed in, the water blocking material 3 is attached to the joint portions 10g, 1g.
It is applied simultaneously to the outside of 1 g.

In such a pile wall construction method, since the waterproofing material 3 can be applied to the joint portion of the pile at the same time when the next pile 11 is driven, high-pressure water jetting for soil removal of the joint portion is unnecessary, The construction period can be shortened and the water blocking material can be surely applied. Further, since the conventional pile can be used as it is without attaching a steel material to the joint portion of the pile or forming the joint portion of the pile into a special shape, the pile can be reused.

Figures 5 and 6 show the first of the pile walls where this construction was performed.
An example is shown, and the water blocking material 3 is the joint portion 10 of the pile rows 10 and 11.
It is provided in the longitudinal direction along the outside of g and 11g. In these figures, A is the excavation side to be excavated after the pile wall construction, B is the ground side opposite to the excavation side, and the waterproofing material 3
Is located at the joint portion on the ground side B. Therefore, when pressure P such as earth pressure or water pressure acts, the water blocking material 3 comes into close contact with the joint portion from the outside, exerts a large water blocking force, and becomes a reliable water blocking structure.

Further, since the pressure P is applied in the direction in which the water blocking material 3 comes into close contact with the joint portion, the water blocking material 3 does not separate from the joint portion, and reliable water stopping can be performed over time. In this case, it is not necessary to apply the water blocking material 3 over the entire length of the pile because the water blocking material 3 is intended to prevent water leakage from the ground side B to the excavation side A.

FIG. 7 shows a second embodiment of the water blocking member 1, and a cover plate 7 made of hard plastic or steel is provided outside the water blocking member 3. The cover plate 7 is a waterproof material 3
Is attached to the leading tip 2 so as to cover the outer surface of the leading tip 2 and follows the pushing movement of the leading tip 2 in the joint portion 10g to enter the ground together with the water blocking material 3.

Since the cover plate 7 covers the outer surface of the water blocking material 3, it prevents water leakage, and when pressure P such as earth pressure or water pressure acts, the water blocking material 3 is pressed toward the joint portion to prevent the water blocking material 3 from leaking. Since the close contact with the joint is promoted, the water can be stopped more reliably. In particular, when a water-swellable sealing material is used as the water blocking material 3, the swelling direction is regulated and the sealing material acts so as to swell toward the joint portion, so that the water blocking force of the sealing material is increased. be able to.

In the third embodiment of the water blocking member shown in FIG. 8, the water blocking material connecting fitting 21 is directly attached to the lower side of the next pile 11 in advance. At the time of construction, the water blocking material 3 may be attached to the water blocking material connecting fitting 21 and the next pile 11 may be driven as it is.

FIG. 9 shows a second embodiment of the method for constructing a pile wall, in which an injection pipe 8 is used as a water blocking material. The injection pipe 8 is formed with a large number of small holes and is connected to the leading tip 2 by welding or the like. The injection pipe 8 follows the pushing movement of the leading tip 2 in the joint portion 10a of the existing pile 10 and advances into the ground along the joint portion of the pile rows 10 and 11.

Then, with this progress, the grout agent 9 is injected at high pressure,
The grout agent 9 is injected through the small holes of the injection pipe 8. In this construction, since the grout agent 9 is injected into the ground along the joint portion of the pile row at the same time as the leading tip 2 is pushed in, a pile wall having a water blocking structure can be constructed quickly and easily.

FIG. 10 shows a third embodiment of the method of constructing a pile wall. In this embodiment as well, the injection pipe 8 is used as the water blocking material, but the contact plate 13 is attached near the lower end of the joint portion of the existing pile 10. The contact plate 13 is used to stop the inflow of the injecting pipe 8 when the injecting pipe 8 contacts. Therefore,
The injection pipe 8 follows the pushing movement of the leading tip 2 and enters the ground, but stops when it reaches the contact plate 13. Then, when the next pile 11 is further driven in this state, the injection pipe 8 and the leading tip 2 are separated.

After this separation, if the grout agent is injected under high pressure while pulling up the injection pipe 8, only the grout agent remains in the ground to stop the water. In this construction, the plate 1
By attaching 3 to an arbitrary height position, the depth of the grout agent can be adjusted.

(Effect of the invention) In the pile wall of the present invention, since the waterproofing material is provided along the pile joint portion on the ground side opposite to the excavation side, the waterproofing material adheres firmly to the pile joint portion due to earth pressure or water pressure. It can stop water. Further, according to the water blocking member of the present invention, the construction of the water blocking material along the joint portion of the pile can be easily performed. Furthermore, according to the construction method of the present invention, it is possible to construct a pile wall having a water blocking effect in a short period of time without requiring a design change of the pile.

[Brief description of drawings]

The drawings show embodiments of the present invention. FIG. 1 is an enlarged perspective view showing a first embodiment of a water blocking member, FIG. 2 is an enlarged sectional view showing an example of a water blocking member, and FIG. An enlarged plan view showing the first embodiment of the construction method, FIG. 4 is a perspective view thereof, FIGS. 5 and 6 are plan views and side views showing the first embodiment of the pile wall, and FIG. 7 is a water stoppage. 8 is an enlarged plan view showing the second embodiment of the member
FIG. 9 is a side view showing a third embodiment of the water blocking member, FIG. 9 is a perspective view showing a second embodiment of the construction method, and FIG. 10 is a perspective view showing a third embodiment of the construction method. DESCRIPTION OF SYMBOLS 1 ... Member for water stop, 2 ... Leading tip 3 ... Water stop material, 4 ... Core material 5 ... Water swelling sealing material, 6 ... Connection pipe 7 ... Cover plate, 8 ... Injection pipe 10 ... Existing pile, 10g, 11g … Joint section 11… Subsequent pile A… Excavation side, B… Ground side

Claims (3)

[Claims] 1. A leading tip formed in a shape that can be fitted into a joint portion of a pile, and a water blocking material connected to the leading tip, wherein the leading tip of the existing pile is connected to the water blocking material. A water blocking member that is pushed into the joint. 2. A pile constructed by the pile provided with the water blocking member according to claim 1, and on the outside of the joint of the pile row on the ground opposite to the excavation side,
A pile wall having a waterproof structure provided with a waterproof material along the longitudinal direction of a joint portion. 3. A leading tip formed into a shape that can be fitted into a joint portion of a pile is fitted into a joint portion of an existing pile, and then a joint portion of a subsequent pile is fitted into a joint portion of an existing pile, and the next installation is performed. A method of constructing a water-stop structure pile wall in which a leading tip is pushed into a joint portion of an existing pile by moving a pile and moved, and a water-stopping material along the joint portion is provided outside the joint portion in accordance with the pushing movement.