JPH06248637A - Steel made continuous wall and construction thereof - Google Patents

Abstract

PURPOSE:To adopt a continuous underground wall in a narrow city and take a less construction space and reduce an amount of earth to be excavated at a time. CONSTITUTION:Joint-provided shape steel is inserted into a preceding shaft 2a and a succeeding shaft 2b and concrete 4 is filled up around the shape. Joints 3b are inserted into a middle shaft 2c bored in the portion of concrete between the joint-provided shapes 3a so that adjacent joint-provided shaped may be connected with each other, thereby filling up the middle shaft with a hardening grout material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a continuous steel wall and a method of constructing the same.

[0002]

2. Description of the Related Art In a conventional steel continuous wall, for example, as shown in FIG. 9, a substantially rectangular panel-shaped wall body in which a square steel material 10 and a linear steel sheet pile 11 are combined is inserted into an excavation groove 12.
Some are filled with concrete 4. As for the construction of the continuous wall, as shown in FIG. 10, after excavating the grooves of the plurality of guts 15 (excavation unit) with the bucket excavator 13, a steel panel is inserted and the space between the ground and the panel is filled with concrete 4. However, a large continuous wall is constructed underground.

[0003]

In the conventional continuous steel wall, when the groove is excavated, the mud 14 is used to avoid the collapse of the groove wall, and one gut is excavated by a large rotary bit type excavator or the like. To do. In general wall construction, the longer the excavation element length, the better the efficiency, so the element length is 6 to 8 m. When constructing a continuous wall in a traffic route such as a road / railway, it is conceivable to temporarily interrupt the work, for example, for 10 hours at night, or to perform the work. In this case, when setting up a large excavator as in the past and trying to excavate the element long groove, preparation, excavation work, steel panel insertion,
A series of concrete filling and removing cycles do not end in a unit time, and the number of setup changes increases and the efficiency drops significantly. Moreover, the muddy water is left in an unstable state. Also, as the amount of muddy water increases, the above-ground equipment such as muddy water tanks also becomes larger. INDUSTRIAL APPLICABILITY The present invention occupies a short time such as night without always interrupting traffic, can install small construction equipment in a short time, excavate and remove, and keep a safe state even when the work is left suspended It is an object of the present invention to provide an underground steel continuous wall that can be maintained and can reduce the amount of muddy water used by shortening the excavation unit, and a method of constructing the same.

[0004]

In order to achieve the above object, in the steel continuous wall of the first aspect of the present invention, a large number of preceding vertical holes 2a and backward vertical holes 2b which are bored in an overlapping manner are provided. The joint steel 3a is inserted and the concrete 4 is filled therein, and the joint material 3 is placed in the intermediate vertical hole 2c formed in the portion of the concrete 4 between the adjacent joint steels 3a.
b is inserted, is connected by the meshing of the shaped steel 3a with a joint and the joint material 3b, and is a continuous steel wall in which the hardenable grout material 5 is filled between the intermediate vertical hole 2c and the joint material 3b. Further, in the steel continuous wall building method of the second invention, a large number of preceding vertical holes 2a are bored at intervals on the planned line for continuous wall building, and the shaped steel with joint 3a is inserted into each preceding vertical hole 2a. , Concrete 4 is filled between the leading pit 2a and the shaped steel 3a with a joint, and the trailing pit 2 is placed between the adjacent leading pits 2a.
b are drilled so as to overlap each other, the shaped steel 3a with a joint is inserted into the trailing vertical hole 2b, and the concrete 4 is filled between the trailing vertical hole 2b and the shaped steel 3a with a joint. An intermediate vertical hole 2c is formed in the portion of the concrete 4 between the shaped steels 3a.
And insert the joint material 3b into the intermediate vertical hole 2c,
The step of connecting the adjacent joint-shaped shaped steels 3a by the engagement of the joint material 3b and filling the curable grout material 5 between the intermediate vertical hole 2c and the joint material 3b is repeated.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a steel continuous wall according to the present invention, in which a preceding vertical hole 2 formed by overlapping is provided.
a and the trailing vertical hole 2b, the shaped steel 3a with a joint is inserted and the concrete 4 is filled, and the shaped steel 3 with a joint is further provided.
Shaped steel with joints 3 adjacent to each other by a joint material 3b inserted into an intermediate vertical hole 2c formed in a concrete portion between a
a is connected by the engagement of the joint material 3b, and then the curable grout material 5 is filled. 2 and 3 show an example of the shaped steel 3a with a joint used in the present invention. The shaped steel 3a with a joint is formed by attaching a joint 3c with a slit in the axial direction to a shaped steel (for example, I-shaped steel or box steel) having a shape having a large joint second moment in the direction perpendicular to the continuous wall normal. is there. The joint is fixed by welding a L-shaped steel facing each other or a pipe with slits formed. 4 and 5 show the joint material 3b. As the joint material 3b,
I-shaped steel or straight sheet pile is used.

Next, a method of constructing a continuous steel wall will be described in the order of steps with reference to FIGS. First, as the first step, as shown in FIG.
As shown in Fig. 1, the preceding vertical holes (a-1) are provided at regular intervals on the planned continuous wall construction line 1a by reversing excavation or the like.
(A-2) and (a-3) are drilled and the preceding vertical hole (a-
2) Into (a-3), insert the shaped steel 3a with a joint in which the slit portion 3d of the joint 3c is sealed by the shielding plate 3e, and as shown in the preceding vertical hole (a-3), Concrete 4 is filled between the jointed shaped steel 3a.

Next, as a second step, the trailing vertical hole 2 is formed between the adjacent shaped steel bars 3a filled with the concrete 4.
b is bored so as to overlap the preceding vertical hole 2a (b-1), and thereafter, a shaped steel 3a with a joint, which seals a joint similar to the above, is inserted into the vertical vertical hole 2b, and the rear vertical hole 2b is inserted. And the concrete 4 between the joint and the shaped steel 3a with a joint (see (b-2)).

Next, as a third step, as shown in FIG.
The intermediate vertical hole 2c is drilled (c-1), (c-2) with an air hammer by a bit with a special guide in the portion of the concrete 4 between the adjacent shaped steel 3a with joints, and the intermediate vertical hole is formed. After the joint material 3b is inserted into 2c and the jointed shaped steel 3a and the joint material 3b are engaged (c-3), a hardening grout material such as mortar is provided between the intermediate vertical hole 2c and the joint material 3b. See 5 (c-4). The continuous wall may be provided not only in a linear shape but also in a curved shape.

[0009]

The shaped steel with joint 3a is inserted and the concrete 4 is filled into a large number of leading pits 2a and trailing pits 2b which are bored in an overlapping manner. The joint material 3b is inserted into the intermediate vertical hole 2c formed in the portion of the concrete 4 between 3a, the shaped steel 3a with a joint and the joint material 3b are connected by their meshing, and the intermediate vertical hole 2c and the joint. Since the hardened grout material 5 is filled between the hardened material and the material 3b to form the continuous steel wall, a strong continuous steel wall can be easily constructed. Further, in the method for constructing a continuous steel wall of the present invention, a large number of preceding vertical holes 2a are bored at intervals on the planned construction line of the continuous wall, and the shaped steel 3a with a joint is inserted into each preceding vertical hole 2a. Then, the concrete 4 is filled between the preceding vertical hole 2a and the shaped steel 3a with a joint, and the trailing vertical hole 2b is provided so as to overlap between the adjacent preceding vertical holes 2a. Insert the shaped steel 3a with a joint, fill the concrete 4 between the trailing vertical hole 2b and the shaped steel 3a with a joint, and form an intermediate vertical hole 2c in the portion of the concrete 4 between the adjacent shaped steels 3a with a joint. Perforate, then insert the joint material 3b into the intermediate vertical hole 2c,
Since the adjacent shaped steel 3a with a joint is connected by meshing with the joint material 3b, and the step of filling the curable grout material 5 between the intermediate vertical hole 2c and the joint material 3b is repeated,
According to the method for constructing a continuous steel wall of the present invention, the step of piercing the preceding vertical hole and the following vertical hole, the insertion of the shaped steel with a joint into each vertical hole, the drilling of the concrete-filled intermediate vertical hole, the joint Since it is possible to finish the work such as inserting materials one by one, it can be applied in the case of nighttime construction where the traffic is temporarily cut off without dedicating the construction space in the construction in a narrow city. it can. Further, since the vertical holes are finished one by one and constructed, the amount of muddy water used can be reduced. Moreover, since the amount of excavated soil to be excavated at one time is small, the effect of reducing the influence on the surrounding ground can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view showing a continuous steel wall according to an embodiment of the present invention.

FIG. 2 is a plan view showing an example of a shaped steel with a joint.

FIG. 3 is a plan view showing another example of shaped steel with a joint.

FIG. 4 is a plan view showing an example of a joint material.

FIG. 5 is a plan view showing another example of the joint material.

FIG. 6 is a cross-sectional plan view showing a state where a shaped steel with a joint is inserted into the preceding vertical hole and concrete is filled.

FIG. 7 is a cross-sectional plan view showing a state in which a trailing pit is provided between the leading pits, the concrete is filled therein, and the shaped steel with a joint is inserted.

FIG. 8 is a cross-sectional plan view showing a state where adjacent shaped steel with joints are connected by joint materials.

FIG. 9 is a cross-sectional plan view showing a conventional steel continuous wall.

FIG. 10 is a vertical cross-sectional side view showing a state in which a groove is excavated by a bucket excavator in the conventional construction of a continuous steel wall.

[Explanation of symbols]

 1 Steel continuous wall 2a Leading hole 2b Trailing hole 2c Intermediate hole 3a Shaped steel with joint 3b Joint material 3c Joint 3d Slit part 3e Shielding plate 4 Concrete 5 Hardenable grout material 10 Square steel material 11 Straight steel sheet pile 12 Drilling Groove 13 Bucket excavator 14 Mud

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshitaka Ono 5-9-1 Nishihashimoto, Sagamihara City, Kanagawa Pref., Nippon Steel Corporation Marine & Steel Division (72) Inventor Onno Nishi Nishishinjuku, Shinjuku-ku, Tokyo 1-13-12 In Teishi Ishii Kogyo Co., Ltd. (72) Inventor Yoshihiro Sari 1-13-12 Nishishinjuku, Shinjuku-ku, Tokyo In Teishi Ishizukai Kogyo Co., Ltd.

Claims (2)

[Claims] 1. Shaped steel with a joint 3a is inserted into a large number of leading pits 2a and trailing pits 2b, which are bored in an overlapping manner, and concrete 4 is filled therein. The joint material 3b is inserted into the intermediate vertical hole 2c formed in the portion of the concrete 4 between 3a, is connected by the meshing of the shaped steel 3a with the joint and the joint material 3b, and the intermediate vertical hole 2c and the joint material 3b. A continuous steel wall characterized by being filled with a hardenable grout material 5 between and. 2. A large number of preceding vertical holes 2a are bored at intervals on a continuous wall construction planned line, and a shaped steel 3a with a joint is inserted into each preceding vertical hole 2a to form a leading vertical hole 2a and a shaped steel with a joint. Concrete 4 is filled between 3a, and trailing pits 2b are bored so as to overlap between adjacent leading pits 2a, and the shaped steel 3a with a joint is inserted into the trailing pits 2b. Concrete 4 is filled between the hole 2b and the shaped steel 3a with a joint, and the intermediate vertical hole 2c is bored in the portion of the concrete 4 between the adjacent shaped steel 3a with a joint, and the joint material 3b is provided in the intermediate vertical hole 2c. And insert the adjacent shaped steel 3a with a joint into the joint material 3
b is connected by meshing, the intermediate vertical hole 2c and the joint material 3b
A method for constructing a continuous steel wall, which comprises repeating the step of filling the curable grout material 5 between them.