JP2630359B2 - Underground diaphragm wall construction method - 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 constructing an underground continuous wall such as a retaining wall of an underground structure.

[0002]

2. Description of the Related Art Conventionally, as an underground continuous wall construction method,
As shown in FIG. 9, the ground 10 is filled with muddy water 17.
A female joint 18 extending in the longitudinal direction of the flange is fixed to one end of each flange of the H-shaped steel, and the other end of each flange of the H-shaped steel is fixed to one end of each flange of the H-shaped steel. A steel sheet pile 20 with a joint, and a plurality of steel sheet piles 20 with a joint.
Is built in the muddy water in the slot 11 with the male joint 19 inserted into the female joint 18, and the male joint 19 extending vertically is fixed to both sides of the partition plate 21 in the width direction, A protection / reaction member 22 is formed, and each male joint 19 of the protection / reaction member 22 is inserted into each female joint 18 of a steel sheet pile 20 with a joint at the end, and the partition plate 21 and the slot 1 are formed.
1 between the end portion and a granular filler 23 such as gravel,
In addition, a partition member 24 is interposed between each female joint 18 and both side walls of the slot 11. Next, as shown in FIG. 10, muddy water between the jointed steel sheet pile 20 and both side walls of the slot 11 is solidified to form a solidified material layer 25, and then between the adjacent jointed steel sheet pile 20. A method of filling concrete with concrete 26 is known.

[0003]

In the case of the above-mentioned conventional underground continuous wall construction method, a muddy solidifying material is poured into muddy water 17 between the jointed steel sheet pile 20 and both side walls of the slot 11 to solidify the solidified material. After forming the layer 25, the steel sheet pile 2 with the joint which is further adjacent
Since the concrete wall is built by filling concrete during 0, the solidification material needs to be injected several times, the construction is complicated, and it takes time for each solidification, and the construction efficiency is poor. There's a problem.

[0004]

SUMMARY OF THE INVENTION In order to advantageously solve the above-mentioned problems, a method for constructing an underground continuous wall according to the present invention comprises the steps of:
A steel sheet pile 4 with a male joint is formed by fixing the ends of a large number of steel male joint members 3 to the widthwise end of the flange 2 of the H-section steel 1 at intervals in the longitudinal direction of the flange. Shaped steel 5
A steel female joint member 8 made of a tubular body having a slit 7 is provided integrally with the steel sheet pile 9 with a female joint at a widthwise end of the flange 6 in a state arranged so as to extend in the longitudinal direction of the flange. A plurality of steel sheet piles 4 with male joints and steel sheet piles 9 with female joints are built in slots 11 provided in the ground 10 with the male joint members 3 inserted into the female joint members 8, A time-hardening material 13 is simultaneously injected and filled from the tremy tube 12 inserted between the adjacent steel sheet piles, between the adjacent steel sheet piles, in the female joint member 8 and between the steel sheet pile and the slot 11.

[0005]

1 to 7 show an embodiment of the present invention, in which a plurality of male male joint members having a T-shaped cross section are provided at both ends in the width direction of each flange 2 of an H-section steel 1. FIG. 3 is fixed by welding at predetermined intervals in the longitudinal direction of the flange to form a steel sheet pile 4 with a male joint. In addition, both ends of the H-shaped steel 5 in the width direction of each flange 6 are formed. The slit 7 in the steel female joint member 8 having a partially cut circular cross section having a slit 7 extending in the pipe axis direction.
And the female joint member 8 is fixed to the flange 6 by welding to form a steel sheet pile 9 with a female joint.
Is configured.

When the underground continuous wall is constructed using the steel sheet pile 4 with the male joint and the steel sheet pile 9 with the female joint, FIG.
As shown in FIG. 2 and FIG. 2, a large number of steel sheet piles 4 with male joints and steel sheet piles 9 with female joints are alternately arranged in series in slots 11 provided in the ground 10. The flange 15 and the base end portion of the web 14 are inserted and inserted into the female joint member 8.

Next, a partition plate 16 is interposed between the steel sheet pile and both side walls of the slot 11, and the adjacent steel sheet pile 4 with a male joint is provided.
When the tremee pipe 12 is inserted between the steel sheet pile 9 with the female joint and a time-hardenable material 13 such as concrete is injected from the tremy pipe 12, the time-hardenable material 13 is inserted between the adjacent steel sheet piles 4 and 9. At the same time as the time-hardening material 13 is filled with the male joint member 3 inserted into the adjacent female joint member 8 at the tip end portion of the web 14 fixed at a predetermined interval in the vertical direction. Between the steel sheet piles 4, 9 and the slots 11 from the slits opened at a predetermined interval between them.
And the female joint member 8 is simultaneously and sufficiently filled with the time-curable material 13 from the open slit. After filling, the tremie tube 12 is withdrawn.

Next, the partition plate 16 is removed and relocated, and the tremy tube 12 is inserted into another position.
3 are filled simultaneously between the adjacent steel sheet piles 4 and 9, between the steel sheet piles 4 and 9 and both side walls of the slot 11, and in the female joint member 8. By repeating the same steps, the time-hardening material 13 was sufficiently filled between the adjacent steel sheet piles 4 and 9 and between the steel sheet piles 4 and 9 and both side walls of the slot 11. A strong underground diaphragm wall is built. Especially,
Since the large portion of the slit of the female joint member 8 is left open, the time-curable material 13 is extremely well filled, and a joint structure with high structural reliability can be obtained.

When the present invention is carried out, as shown in FIG. 8, one end of each of the flanges 2 of the H-section steel 1 in the width direction is provided with a plurality of T-shaped cross sections of the steel male joint member 3 made of steel. A female female joint member 8 made of a tubular body having a slit 7 fixed to the distal end portion at a predetermined interval in the longitudinal direction of the flange and having a slit 7 at the other end in the width direction of each flange 2 of the H-shaped steel 1. May be used in a state where the sheet piles are fixed so as to extend in the longitudinal direction of the flange. The male joint may have an arbitrary cross section.

The predetermined interval at which the male male joint member 3 having a T-shaped cross section is fixed to each flange 2 is determined as long as the strength of the male joint as a joint is not impaired.
As an example, FIGS. 1 and 8 show about four times the width of the web 14 in the steel male joint member 3 having a T-shaped cross section.

[0011]

According to the present invention, the ends of a large number of male male joint members 3 are fixed to the widthwise ends of the flanges 2 of the H-section steel 1 at predetermined intervals in the longitudinal direction of the flanges. A steel female sheet member 4 comprising a tubular body having a slit 7 is arranged at the widthwise end of the flange 6 of the H-section steel 5 so as to extend in the longitudinal direction of the flange. A steel sheet pile 9 with a female joint is formed integrally in this state, and a number of steel sheet piles 4 with a male joint and the steel sheet pile 9 with a female joint are inserted into a slot 11 provided in the ground 10 by a female joint member. 8
In the state where the male joint member 3 is inserted therein, the aging hardening material 13 is inserted from the tremy tube 12 inserted between the adjacent steel sheet piles, between the adjacent steel sheet piles, in the female joint member 8 and with the steel sheet pile. Since it is simultaneously injected and filled into the slot 11, it is only necessary to inject the time-hardening material 13 from the tremy tube 12 inserted between the steel sheet pile 4 with the male joint and the steel sheet pile 9 with the female joint. The time-hardenable material 13 can be simultaneously and efficiently filled completely between the steel sheet piles 4, 9 and between the steel sheet piles 4, 9 and both side walls of the slot 11.

In the female joint member 8, which is insufficient in the prior art, a time-curable material 13 is formed through an open slit between the female joint members 3 fixed at a predetermined interval. Can be sufficiently filled, and an extremely reliable joint structure without joint play can be obtained.
Furthermore, since the ends of the steel male joint member 3 are fixed at predetermined intervals as compared with the male joint that is continuous in the longitudinal direction of the flange in the prior art, the amount of steel material used can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional plan view showing a method of constructing an underground continuous wall according to an embodiment of the present invention, passing through positions between male joint members.

FIG. 2 is a cross-sectional plan view showing a method of constructing an underground continuous wall according to an embodiment of the present invention, which passes through a male joint member.

FIG. 3 is a perspective view showing a steel sheet pile with a male joint used in the embodiment of the present invention.

FIG. 4 is a cross-sectional plan view of a portion between the male joint members showing the steel sheet pile with a male joint used in the embodiment of the present invention.

FIG. 5 is a cross-sectional plan view of a male joint member showing a steel sheet pile with a male joint used in an embodiment of the present invention.

FIG. 6 is a perspective view showing a steel sheet pile with a female joint used in the embodiment of the present invention.

7 is a cross-sectional plan view of the steel sheet pile with the female joint shown in FIG. 6;

FIG. 8 is a perspective view showing a steel sheet pile with a male joint member and a female joint member that can be used in carrying out the present invention.

FIG. 9 is a cross-sectional plan view showing a state in which a steel sheet pile with a joint is built in the muddy water of a slot in a conventional underground continuous wall construction method.

FIG. 10 is a cross-sectional plan view showing a state in which muddy water between a slot and a steel sheet pile with a joint is solidified and concrete is filled in the steel sheet pile with a joint in a conventional method for constructing an underground continuous wall.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 H-section steel 2 Flange 3 Male joint member 4 Steel sheet pile with male joint 5 H-section steel 6 Flange 7 Slit 8 Female joint member 9 Steel sheet pile with female joint 10 Ground 11 Slot hole 12 Tremy tube 13 Temporary hardening material 14 Web 15 Flange 16 Partition plate

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor: Hiroshi Miki 2-3-6, Otemachi, Chiyoda-ku, Tokyo Inside Nippon Steel Corporation (72) Inventor: Hiroshi Furube 2-5-2, Kitaaoyama, Minato-ku, Tokyo No. 8 Intra-company group (72) Inventor Toshio Watanabe 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (56) References JP-A-3-151415 (JP, A) JP-A-2 -200302 (JP, A) JP-A-51-22215 (JP, A) JP-A-2-15635 (JP, U)

Claims (1)

(57) [Claims] 1. A steel sheet pile 4 with male joints, wherein the ends of a large number of steel male joint members 3 are fixed to the widthwise ends of the flanges 2 of the H-section steel 1 at intervals in the longitudinal direction of the flanges. And a steel female joint member 8 formed of a tubular body having a slit 7 at the width direction end of the flange 6 of the H-shaped steel 5,
A steel sheet pile 9 with a female joint is integrally provided in a state where the steel sheet pile 9 is arranged so as to extend in the longitudinal direction of the flange, and a large number of steel sheet piles 4 with a male joint and female joints are provided in a slot 11 provided in the ground 10. The steel sheet pile 9 is erected with the male joint member 3 inserted into the female joint member 8, and the time-hardenable material 13 is inserted from the tremy tube 12 inserted between the adjacent steel sheet piles, between the adjacent steel sheet piles. A method of simultaneously injecting and filling the inside of the female joint member 8 and between the steel sheet pile and the slot 11.