JP2989573B2 - Grouting method for concrete sheet pile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for grouting concrete sheet pile.

[0002]

2. Description of the Related Art Conventionally, for example, when revetment work is performed,
A number of concrete sheet piles are driven into the coastal soil with the end faces of adjacent sheet piles abutting each other.

[0003] At this time, a groove is formed in the longitudinal direction in the connection end face of the concrete sheet pile, and a grout injection space is formed by adjacent grooves, and grout is inserted into the grout injection space through a grout bag. By injecting, the watertightness of the joint is improved.

[0004]

However, in the above-mentioned concrete sheet pile, when the end faces of the adjacent sheet piles are surely in surface contact with each other, good watertightness can be maintained. If the end faces of adjacent sheet piles are not in surface contact with each other due to inclination during driving, etc., the grout bag is easily extruded by an external force such as seawater through a gap formed between the end faces, There was a problem that the watertightness of the joint could not be maintained.

[0005]

Therefore, according to the present invention, a fitting ridge is formed on one connection end face of the sheet pile main body in the longitudinal direction, and a fitting ridge is formed on the other connection end face in the longitudinal direction. Forming, adjacent sheet pile bodies can be connected by fitting the fitting ridge and the fitting concave ridge, and furthermore, forming a groove in the fitting ridge in the longitudinal direction, A grout-injection space can be formed by the groove portion and the fitting concave ridge portion of the adjacent sheet pile main body, and grout is injected into the grout-injection space as follows. To provide a method of grout injection into the grout.

A grout injection tube, which also functions as a grout bag insertion rod and has a plurality of injection holes formed in the peripheral wall at intervals in the longitudinal direction, is inserted into the grout bag.

[0007] A grout injection hose is inserted into the grout injection pipe so that it can be freely inserted and removed.

[0008] Grout is injected into the grout bag through an injection hole formed in the peripheral wall of the grout injection pipe through a grout injection hose.

The grout injection hose is pulled out of the grout injection tube while grout is being injected.

[0010] The present invention is also characterized in that the grout injection tube is embedded in grout in a grout bag.

[0011]

For example, when revetment work is performed, a large number of concrete sheet piles are fitted and abutted by fitting fitting ridges and fitting recesses formed on connection end faces of adjacent sheet piles. And drive each into the coastal soil.

A groove is formed in the fitting ridge formed on the sheet pile main body in the longitudinal direction, and the groove and the fitting recess form a gap between the grout injection chambers. By injecting grout into the space through the grout bag, it is possible to ensure good watertightness of the joint.

At this time, grout can be easily and reliably injected into the grout injection space by the following procedure.

A grout injection tube which also functions as a grout bag insertion rod and has a plurality of injection holes formed in the peripheral wall at intervals in the longitudinal direction is inserted into the grout bag.

A grout injection hose is inserted into the grout injection pipe so as to be freely inserted and removed.

The grout is injected into the grout bag through an injection hole formed in the peripheral wall of the grout injection pipe through a grout injection hose.

The grouting hose is pulled out of the grouting tube while grouting.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

A shown in FIG. 1 is a concrete sheet pile according to the present invention. The concrete sheet pile A is formed on a connection end face of one of the sheet pile main bodies 1 formed of concrete and having a substantially U-shaped cross section. A portion 1a is formed along the longitudinal direction from the upper end to the lower end of the sheet pile main body 1, and a concave ridge portion 1b for fitting is formed along the longitudinal direction from the upper end to the lower end of the sheet pile main body 1 at the other connection end face. The sheet pile main bodies 1 and 1 to be connected can be connected to each other by fitting the fitting ridge 1a and the fitting ridge 1b.

Further, a groove 1c is formed in the upper half of the fitting ridge 1a along the longitudinal direction of the fitting ridge 1a as shown in FIGS. A grout injection space 2 can be formed by 1c and the adjacent concave ridge 1b of the sheet pile main body 1.

The grout injection space 2 contains grout 3
Is injected through the grout bag 4, and the grout bag 4 is formed into a bottomed cylindrical shape with a high-strength synthetic fiber as shown in FIG. 5, and is inserted into the grout injection space 2, and High strength is provided to prevent breakage during grout injection, and the elongation is reduced while maintaining high strength using tetron yarn in the longitudinal direction, ensuring dimensionality,
Further, in the lateral direction, a special nylon yarn is used to increase the elongation, thereby improving the adhesion to the side wall and ensuring the water stopping effect.

Then, as shown in FIGS. 5 and 6, the grout bag 4 is inserted into the grout injection space 2 by a grout injection tube 7 made of vinyl chloride, which also functions as a grout bag insertion rod. A grout injection pipe 8 made of vinyl is inserted into the grout injection pipe 7 so that it can be freely inserted and removed, and the grout injection hose 8 is passed through the grout injection pipe 8 and a plurality of injection holes are formed in the peripheral wall of the grout injection pipe 7 at regular intervals in the longitudinal direction. Hole 9
The grout 3 is injected into the grout bag 4 more.

At this time, the grouting hose 8 is pulled out while grouting the grout 3 so that the difficulty of the pulling out work due to the solidification of the grout 3 with time can be eliminated. Then, the grout injection tube 7 is embedded in the grout in the grout bag.

In this way, the grout 3 is injected into the grout injection space 2 through the grout bag 4 to improve the watertightness of the joint formed between the joining end faces of the sheet pile bodies 1 and 1. Can be secured.

That is, since the grout injection space 2 is formed in the fitting ridge portion 1a fitted to the fitting concave portion 1b, the adjacent sheet pile main bodies 1, 1 are not surely in surface contact with each other. Even in this case, since the gap between the fitting portions formed by the fitting concave ridge portions 1b and the fitting convex ridge portions 1a is small, the grout bag 4 is not pushed out by an external action force such as seawater.
The watertightness of the joint formed by the sheet pile main bodies 1 and 1 can be ensured satisfactorily.

FIGS. 7 to 9 show a grout injection space forming structure according to another embodiment.
Are shown when two are formed and when three are formed.

The sheet pile main body 1 of the concrete sheet pile A
Is not limited to the shape described in the present embodiment, and the structure can be applied to a sheet pile made of prestressed concrete. For example, the present invention can be applied to a concrete sheet pile described in Japanese Patent Application No. 62-176444 filed earlier by the applicant.

[0028]

According to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, the grout bag is inserted into the grout injection space by the grout injection tube which also functions as a grout bag insertion rod, and the grout injection hose is inserted into the grout injection tube in the grout bag. Then, since grout is injected into the grout bag through the same grout injection hose, grout can be easily and reliably injected into the elongated grout injection space via the grout bag, Watertightness of joints can be secured well, and the seawall function can be maintained for a long time.

At this time, since the grout injection hose is pulled out from the grout injection pipe while injecting grout, it is possible to eliminate the difficulty of the drawing operation due to the solidification of the grout over time.

According to the second aspect of the present invention, since the grout injection tube is embedded in the grout in the grout bag, it is possible to save the trouble of pulling out the grout injection tube and perform the grout injection operation. It can be done simply and reliably.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a concrete sheet pile used in a grouting method according to the present invention.

FIG. 2 is a sectional view taken along line II of FIG. 1;

FIG. 3 is a sectional view taken along line II-II of FIG. 1;

FIG. 4 is an explanatory perspective view of a main part.

FIG. 5 is an explanatory view of a grouting operation into a grout bag.

FIG. 6 is an enlarged explanatory view of the main part.

FIG. 7 is a cross-sectional plan view of a concrete sheet pile as another embodiment.

FIG. 8 is a sectional plan view of a concrete sheet pile as another embodiment.

FIG. 9 is a sectional plan view of a concrete sheet pile as yet another embodiment.

[Explanation of symbols]

 A Concrete sheet pile 1 Sheet pile body 1a Convex ridge for fitting 1b Concave ridge for fitting 1c Groove

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-47820 (JP, A) JP-A-54-1909 (JP, A) Actually open Sho 55-40002 (JP, U) (58) Field (Int.Cl. ⁶ , DB name) E02D 5/02-5/20

Claims (2)

(57) [Claims] 1. A projecting ridge for fitting is formed in a longitudinal direction on one connecting end face of a sheet pile body, and a concave ridge for fitting is formed in a longitudinal direction on the other connecting end face so that adjacent sheet pile bodies can be connected to each other. By connecting the fitting ridge and the fitting concave ridge, connection is possible, and a groove is formed in the fitting ridge in the longitudinal direction so that the groove and the adjacent sheet pile main body are fitted. A grout injection method for a concrete sheet pile, characterized in that a grout injection space can be formed by the concave streak portion and grout is injected into the grout injection space as follows. In grout bag , as grout bag insertion stick
Function, and the injection hole is provided on the peripheral wall at intervals in the longitudinal direction.
Insert a plurality of grout injection tubes . grout
A grout injection hose is inserted into the injection tube so that it can be freely inserted and removed . Grout injection through grout injection hose
Grout is injected into the grout bag through an injection hole formed in the peripheral wall of the pipe . Grout injection hose, grout injection
Pull out the grouting tube while inserting . 2. The grout injection tube is connected to a grout bag inside a grout bag.
The method for injecting grout into a concrete sheet pile according to claim 1 , wherein the grout is embedded in a grout.