JP2003247244A - Underground diaphragm wall, its construction method, and excavator - Google Patents

Abstract

(57) [Summary] The present invention relates to an underground continuous wall, for example, when constructing an underground structure, it is an object to block vibration from a subway or a road adjacent to the underground structure. is there. SOLUTION: This is an underground continuous wall 1 in which an anti-vibration means 4 is embedded inside an underground continuous wall.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous underground wall and its construction, which are provided to block vibrations from a subway or a road adjacent to an underground structure, for example, when the underground structure is constructed. The present invention relates to a method and an excavator used for the method.

[0002]

2. Description of the Related Art Conventionally, when constructing an underground structure such as an acoustic hall or an opera house that is averse to ambient noise, a high-performance anti-vibration system that blocks vibrations from adjacent subways and motorways. Swing structure is required. The anti-vibration structure is, for example,
As shown in FIGS. 12 (A) and 12 (B), a mountain retaining wall 22 is constructed in the vicinity of a box culvert 21 of a subway or a road / railway. The anti-vibration material 24 such as the above is fixed to the mountain retaining wall 22, and then the permanently constructed concrete frame 23 is constructed. Thus, there is known a structure in which the vibration-proof material 24 is arranged between the outer peripheral wall 23a of the concrete skeleton 23 and the mountain retaining wall 22 (Japanese Patent Laid-Open No. 8-41869).
issue).

[0003]

However, in the above-mentioned vibration-proof structure, since the excavation depth is deep and the vibration-proof material is used after the mountain retaining wall is constructed, the construction period becomes long and the cost also increases. . Furthermore, since a high-performance anti-vibration structure is required, there is a problem that workability becomes difficult. The underground continuous wall, the method for constructing the same, and the excavator according to the present invention have been proposed to solve such problems.

[0004]

The gist of the above-mentioned problems of the underground continuous wall according to the present invention is that the vibration isolating means is embedded inside the underground continuous wall.

Further, the underground continuous wall is composed of an outside underground continuous vibration isolating wall and an inside underground retaining wall, and the underground continuous vibration isolating wall is embedded with vibration isolating means.

The vibration isolating means is continuously provided in a lateral direction orthogonal to the vertical direction and is also used for external waterproofing. Further, the vibration isolating means comprises a metal frame and A vibration damping material adhered to the frame, guide means for an excavator for excavating the ground in the adjacent portion is provided in a part of the frame, and the vibration damping means is made of metal. A frame, and a vibration-proof material attached to the frame, and a guide means for vibration-proof means embedded in a hole in an adjacent portion is provided in a part of the frame, The frame of the vibrating means is composed of a pair of H-shaped steels standing upright in the vertical direction and having web surfaces facing each other, and a frame horizontally spanned between the flanges of the H-shaped steels. The H-section steel on the adjacent portion side is provided with a guide portion for an excavator or a guide portion for vibration damping means,
In the frame of the vibration isolating means, a leading member for reducing the immersion resistance is provided at the lower end in the vertical direction.

The gist of the method for constructing a continuous underground wall according to the present invention is to provide an anti-vibration material composed of an elongated rectangular metal frame and a vibration-proof material attached to the frame. Shaking means is formed, the ground is excavated by an excavator, the vibration isolating means is buried in the excavated hole, and then the excavator excavates the ground at the adjacent portion, and a hole is drilled at this adjacent portion. This is to construct by repeatedly embedding the vibration damping means in the hole and continuously drilling holes in the adjacent portions to embed the vibration damping means.

Guide means for the excavator is provided on one end side of the vibration isolating means, and the adjacent portion is excavated while the guided portion of the excavator is guided along the guide means. One end of the vibration isolating means Guide means for the vibration isolating means of the adjacent portion is provided on the side, and the vibration isolating means of the adjacent portion is buried in the drilled hole while the guided portion of the vibration isolating means of the adjacent portion is placed along the guide means. It includes.

The gist of the excavator according to the present invention is that, in the excavator, a guided means, which is guided by guide means for the excavator provided on the frame of the vibration isolating means, is provided laterally. Is.

According to the underground continuous wall and the method for constructing the same according to the present invention, since the vibration isolating means is buried inside the underground continuous wall, vibration from the subway, road or rail around the building is effective. To be shut off. Further, even when the excavation depth is deep, the underground continuous vibration isolation wall is arranged outside the mountain retaining wall to block vibration at a position close to the vibration source, and the vibration isolation effect by the vibration isolation means is exerted at high performance. .

Further, since the vibration isolator is continuously provided in the lateral direction orthogonal to the vertical direction, it serves to waterproof the underground structure. Further, since the vibration isolating means is provided with the guide means for the excavator that excavates the ground in the adjacent portion, it is possible to save the work of moving the excavator every other one and constructing the adjacent portion, as in the conventional case. The excavator can be continuously drilled, and the positioning of the excavator is facilitated by being guided. Further, since the vibration isolating means is provided with the guide means for the vibration isolating means which is buried in the drilled hole in the adjacent portion, the work of burying the vibration isolating means becomes efficient.

In the frame of the vibration isolating means, since the leading member for reducing the immersion resistance is provided at the lower end in the vertical direction, the immersion resistance when embedding the vibration isolating means in the soil cement of the drilled hole. Is reduced, and it becomes easier to penetrate the anti-vibration means.

In the method for constructing an underground continuous wall according to the present invention,
Before constructing the retaining wall, or with the construction of a continuous wall that is a retaining wall, we will construct a damping wall by continuously cutting and embedding vibration damping means in the adjacent part, so after constructing the retaining wall. The construction method of the present invention requires less labor and shortens the construction period than the conventional method in which the vibration isolating means is provided inside. Further, the moving time of the wall excavator is shortened, which saves labor.

Further, since the continuous wall is constructed by embedding the vibration isolating wall outside the mountain retaining wall or embedded in the mountain retaining wall, compared to the conventional example in which the vibration isolating means is installed inside the mountain retaining wall. The effective area of the structure is expanded, and the land can be effectively used.

According to the excavator according to the present invention, the excavation work can be performed by being guided by the vibration isolating means embedded in the soil cement of the drilling hole, and the work efficiency in the drilling work is improved,
The straightness in the vertical direction is maintained with high accuracy.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a continuous underground wall, a method for constructing the same, and an excavator according to the present invention will be described with reference to the drawings. To facilitate understanding of the invention, portions corresponding to those of the conventional example will be described with the same reference numerals as those of the conventional example.

The underground continuous wall 1 of the present invention is constructed in order to isolate vibrations from subways, roads and railways around the underground structure, and its structure is as shown in FIG. , The soil cement 3 of the drilled hole 2 excavated in the ground by the excavator A, the vibration-proof wall 4 as the vibration-proof means and the vibration-proof wall 4 for the gap.
It is constructed by embedding a.

Further, as shown in FIG. 2, since the depth of the subway 21 is deep, if it is necessary to deepen the excavation depth in order to build a vibration isolating wall on the adjoining ground, the vibration isolating means is installed in the soil. The underground continuous vibration isolating wall 1a embedded in the cement 3 is constructed, and the earth retaining wall 22 is constructed inside thereof, and the underground continuous antivibration wall 1a and the earth retaining wall 22 form the underground underground continuous wall 1. Further, the main frame 23 is built inside the main body.

The vibration-proof wall 4 and the gap vibration-proof wall 4a, which are the vibration-proof means, are formed by laminating a plurality of vibration-proof rubbers. Therefore, the continuous wall in which the anti-vibration wall 4 is embedded is continuous in the lateral direction orthogonal to the vertical direction (hereinafter, simply referred to as the lateral direction). Therefore, the underground continuous wall 1 shown in FIG. 1 or the ground shown in FIG. The middle continuous vibration isolating wall 1a serves as a vibration isolating wall for the main body 23 and also serves as an underground continuous outer waterproof wall for external waterproofing.

A method of constructing such a continuous underground wall 1 will be described. First, the vibration isolator is formed before the ground excavation.
As shown in FIGS. 3 to 5, the vibration-proof wall 4 is a pair of H-shaped steels 5 in which the web surfaces 5a are arranged upright in the vertical direction so as to face each other.
And a steel frame 6 and a vibration-proof rubber splicing plate 6a (see FIG. 5) which are horizontally mounted by welding at appropriate intervals in the vertical direction between the flanges 5b of the H-shaped steel 5 to form a rectangular frame. Is formed.

A plurality of (four in the illustrated embodiment) laminated anti-vibration rubbers 7 are laminated on the side of the frame 6 and are narrowed by a steel frame 8 and fixed by bolts 9a and nuts 9b. And stick it. As shown in FIG. 3A, the gap vibration isolating wall 4a is provided for laterally continuing the vibration isolating wall. An L-shaped positioning frame 10 is welded and fixed to the outside of the web surface 5a in the vertical direction over substantially the entire length.

The positioning frame 10 is shown in FIG.
As shown in FIG. 5, the reason why the web surface of the H-shaped steel 5 on the right side is provided is to receive the vibration isolating wall 4a for the gap in the adjacent portion, and at the same time, the vibration isolating wall 4a for the gap in the adjacent portion is arranged in the vertical direction. Guide part 10 which is a guide means at the time of burying work
a. The positioning frame 10 also forms a guide portion 10b which is guide means for an excavator described later.

The vibration isolating wall 4 shown in FIG. 3 (B) does not have the gap vibration isolating wall 4a, which is buried in the hole drilled first in the excavation work. This is because there is no drilling in the adjacent part on the left side.

If the frame body needs to be formed long in the vertical direction by several tens of meters, as shown in FIGS. 4 and 6, a connecting plate having bolt holes 11a is formed for connecting the frame body. With 11, bolts and nuts are connected successfully.

Furthermore, as shown in FIG. 4, the lower part of the frame (the lower end part when standing upright in the vertical direction) is steeple-shaped in order to reduce the resistance force when it is immersed in the soil cement 3. A metallic leading member 12 is provided. In order to protect the lower portion, the leading member 12 does not have to be in the shape of a spire, and a U-shaped frame body made of hard metal may be used.

Next, as shown in FIG. 7, the excavator A used in the present invention is a triple drilling machine equipped with a triaxial auger that is driven to rotate simultaneously. In this excavator A, as shown in FIGS. 7 and 8, the side cutter 13 for eliminating the presence of the residual soil portion 14 which is the excavated residual soil in the middle of the triaxial auger.
Further, a guided portion 15 which is laterally projected is provided on one side of the cutter 13.

The guided portion 15 is, as shown in FIGS. 8 to 9, a web surface 5a of the H-shaped steel 5 on the vibration-proof wall 4.
Further, the soil cement 3 is loosely fitted in the guide portions 10a and 10b formed by the positioning frame 10 and guided vertically, and the semi-solidified or solidified soil cement 3 is excavated.

Such an excavator A is prepared to excavate the ground. As shown in FIG. 1, in STEP 1,
An ordinary three-drilling machine without the guided portion 15 is used to position the head portion at the tip by marking or the like provided on the guide ruler, and rotationally drive the three augers to punch holes in the ground.

Cement-based suspension (cement milk) discharged and injected from the auger tip (head) mixes the cement milk and soil in the excavated hole to form soil cement 3. Fill up. An anti-vibration wall 4 that has been created in advance before the soil cement 3 is solidified.
To bury.

The vibration isolating wall 4 does not have the gap isolating wall 4a shown in FIG. 3 (B). The STEP
In order to embed the anti-vibration wall 4 in the drilled hole 2 in 1, the hoist in the excavator is used to lift the crane approximately vertically,
The vibration-proof rubber 7 is directed to the outside, the leading member 12 is placed downward, and the vibration-proof rubber 7 is first pierced by its own weight and then pushed in with a Monken or the like to be embedded. When the excavation depth is deep, Fig. 10
As shown in (A) and (B), the vibration isolating wall 4 is embedded while the connecting plate 11 is appropriately connected with bolts and nuts.

After the soil cement 3 is semi-solidified or solidified in the drilling hole 2 in STEP 1, adjacent portions are continuously drilled in STEP 2 with the right direction in FIG. 1 as the drilling direction. . It is good if the soil cement 3 in STEP 1 and the soil cement 3 in STEP 2 in the adjacent portion do not become turbid.

From STEP 2, the excavator A of the present invention having the guided portion 15 is used. That is, as shown in FIGS. 8 to 9, the guided portion 15 is positioned so as to be along the guide portions 10a and 10b of the vibration-proof wall 4 which has been completely embedded in STEP 1, and the triple auger is rotationally driven. Start drilling. The semi-solidified or solidified soil cement 3 is scraped by the guided portion 15 which is vertically guided along the guide portions 10a and 10b of the vibration-proof wall 4, and a hole is punched in the adjacent ground.

Then, before the soil cement 3 of the drilled hole 2 in STEP 2 is solidified, as shown in FIG.
The anti-vibration wall 4 having the anti-vibration wall 4a for the gap is embedded in the drilled hole 2 by its own weight or a Monken. At this time, the left end portion of the antivibration rubber 7 of the gap antivibration wall 4a is attached to the guide portion 1
It is fitted to 0a so that it can be guided in the vertical direction.
In this way, the vibration isolating wall 4 is smoothly penetrated and embedded in the soil cement 3 by the guide portions 10a and 10b formed by providing the positioning frame 10.

As shown in FIG. 1, the excavator A having the guided portion 15 pierces in the drilling direction to bury the vibration-proof wall 4 as described above. As for the ground drilling work, as shown in FIG. 11A, the drilling work can be carried out continuously in the adjacent portion along the drilling direction. Therefore, a total of 9 holes are created by excavating 3 times.

On the other hand, as shown in FIG. 11 (B), in the drilling work by the conventional excavator, the third excavation is performed over the first and second excavations, so that a total of seven holes are drilled. You can By repeating the drilling work, the difference in the progressing speed is further widened. As described above, in the present invention, the progress in the drilling direction is faster than the speed of the conventional drilling work, and the construction period is shortened.

Thus, excavation of the ground and burying of the vibration isolating wall 4 are repeated to embed the vibration isolating wall 4 as shown in FIG. 1, or the underground continuous vibration isolating wall 1a and the earth retaining wall. Two
2 is for constructing the underground continuous wall 1 shown in FIG. With this underground continuous wall 1, the effect of vibration from a subway or the like close to the underground structure to be constructed can be eliminated by the vibration isolating means including the vibration isolating wall 4.

In the underground continuous wall 1 shown in FIG. 1,
When the anti-vibration effect is fully expected, the anti-vibration wall 4
You may construct by omitting a. In this case, since the anti-vibration wall 4 is not continuous, it cannot be used as an outer waterproof.

[0038]

As described above, in the underground continuous wall according to the present invention, the vibration isolating means is embedded inside the underground continuous wall, or the outside underground continuous vibration isolating wall is provided. It consists of an inner mountain retaining wall, and since the underground continuous vibration isolating wall has a vibration isolating means embedded therein, at the same time as constructing the underground continuous retaining wall or before constructing the inner mountain retaining wall, Since the anti-vibration wall can be constructed by using the anti-vibration wall, the construction time required for anti-vibration work can be dramatically shortened. Also,
Since the anti-vibration wall is arranged close to a vibration source such as a subway, it is possible to effectively suppress the influence of vibration from the vibration source. Furthermore, the anti-vibration wall will be embedded in the continuous wall or will be constructed outside the retaining wall, which will have an excellent effect that the effective area of the land will be expanded and the land can be effectively utilized. is there.

Since the vibration isolating means is continuously provided in the lateral direction orthogonal to the vertical direction and is also used for external waterproofing, it is possible to greatly save the labor for constructing the external waterproofing of the underground structure. The cost will be reduced.

The vibration isolator comprises a metal frame and a vibration isolator attached to the frame, and is a guide means for an excavator for excavating the ground adjacent to a part of the frame. Since the excavator is provided, the excavator can continuously excavate the adjacent ground, which has an excellent effect that the drilling progress is increased and the construction period is shortened.

The vibration isolator comprises a metal frame and a vibration isolator adhered to the frame, and is for a vibration isolator which is embedded in a hole in an adjacent portion in a part of the frame. Since the guide means is provided, there is an excellent effect that the work of burying the vibration isolation means in the drilled hole can be smoothly performed.

The frame of the vibration isolating means is composed of a pair of H-shaped steels standing upright in the vertical direction and having web surfaces opposed to each other, and a frame horizontally mounted between the flanges of the H-shaped steels. Among the H-section steels, the H-section steel on the adjacent side is provided with a guide section for an excavator or a guide section for anti-vibration means, so a frame can be easily created using the H-section steel. it can. Further, in the frame of the vibration isolator, since the leading member for reducing the immersion resistance is provided at the lower end portion in the vertical direction, it is possible to achieve an excellent effect that the penetration work of the vibration isolator becomes easy. is there.

The method for constructing an underground continuous wall of the present invention comprises forming a vibration-proof means comprising a slender rectangular metal frame and a vibration-proof material attached to the frame, and using an excavator to dig the ground. Drilled
By embedding the vibration isolation means in the excavated hole, then excavating the ground with an excavator in the adjacent portion, and repeatedly embedding the vibration isolation means in the hole drilled in the adjacent portion,
Since this is a construction method in which holes are continuously drilled in adjacent areas and vibration-damping means is embedded, it is possible to achieve an excellent effect that the construction period of the vibration-damping means and the drilling work period are both significantly shortened. It plays.

Further, guide means for the excavator is provided on one end side of the vibration isolator, and the adjacent portion is excavated while the guided portion of the excavator is guided along the guide means. A guide means for the vibration isolating means of the adjacent portion is provided on one end side of the same, and the vibration isolating means of the adjacent portion is buried in the drilled hole along the guided portion of the vibration isolating means of the adjacent portion. Therefore, the work efficiency is improved and the construction period is shortened.

In the excavator according to the present invention, the guided means, which is guided by the guide means for the excavator provided on the frame of the vibration-proof means, is provided on the side, so that it is continuous in the drilling direction. It is possible to excavate the adjacent ground and smoothly penetrate the gap anti-vibration wall,
It is possible to construct a continuous anti-vibration wall and an outer waterproof wall, to effectively block vibrations, prevent permeation of groundwater into underground structures, and shorten the construction period of continuous walls. It is effective.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a method for constructing an underground continuous wall according to the present invention.

FIG. 2 is a cross-sectional view of the underground continuous wall according to the present invention in the case where it is composed of an outside underground continuous vibration isolation wall and an inside earth retaining wall.

FIG. 3 is a plan view (A) and (B) of the anti-vibration wall in the underground continuous wall according to the present invention.

FIG. 4 is a side view of the anti-vibration wall in the underground continuous wall according to the present invention.

5 is an enlarged side view of portion B in FIG.

FIG. 6 is a front view (A) of the connecting plate and a plan view (B) of a use state.

FIG. 7 is a front view of an excavator A according to the present invention.

FIG. 8 is an explanatory view of a method of constructing an underground continuous wall according to the present invention.

FIG. 9 is an enlarged explanatory diagram of a C portion in FIG.

FIG. 10 is explanatory diagrams (A) and (B) for explaining a method of constructing an underground continuous wall according to the present invention.

FIG. 11 is explanatory diagrams (A) and (B) for explaining a drilling method according to the present invention and a drilling method according to a conventional example.

FIG. 12 is sectional views (A) and (B) showing a structure of an underground continuous wall according to a conventional example.

[Explanation of symbols]

1 underground continuous wall, 1a underground continuous vibration isolation wall, 2 drilling holes, 3 soil cement, 4 vibration isolation wall, 4a gap isolation wall, 5 H type steel, 5a web surface, 5b, 5c flange, 6 frame, 6a anti-vibration rubber splicing plate, 7 anti-vibration rubber, 8 frame, 9a, bolt, 9b nut, 10 positioning frame, 10a guide part, 10b guide part, 11 connecting plate, 11a bolt hole, 12 leading member, 13 side cutter , 14 Remaining soil part, 15 Guided part, 21 Subway, 22 Mountain retaining wall, 23 Permanent concrete frame.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kenji Kimura             1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd.             Ceremony Company Tokyo Branch (72) Inventor Fukuda Taiiku             1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd.             Ceremony Company Tokyo Branch (72) Inventor Tomoyuki Umeda             1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd.             Ceremony Company Tokyo Branch (72) Inventor Masahiro Matsui             1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd.             Ceremony Company Tokyo Branch (72) Inventor Masato Yabe             1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd.             Ceremony Company Tokyo Branch (72) Inventor Takao Nakajima             1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd.             Ceremony Company Tokyo Branch (72) Inventor Takashi Suzuki             1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd.             Ceremony Company Tokyo Branch (72) Inventor Tatsuro Shiobara             2-3-2 Nishi Gotanda, Shinagawa-ku, Tokyo Stock             Inside the ceremony company Azusa design (72) Inventor Yukio Kumagai             2-3-2 Nishi Gotanda, Shinagawa-ku, Tokyo Stock             Inside the ceremony company Azusa design (72) Inventor Ikuko Rokube             2-3-2 Nishi Gotanda, Shinagawa-ku, Tokyo Stock             Inside the ceremony company Azusa design (72) Inventor Shoichi Kashino             2-3-2 Nishi Gotanda, Shinagawa-ku, Tokyo Stock             Inside the ceremony company Azusa design F-term (reference) 2D047 AB08                 2D049 EA02 EA08 GB06 GC11 GD03                       GD09 GE03 GE10

Claims (11)

[Claims] 1. An underground continuous wall, characterized in that a vibration isolator is embedded inside the underground continuous wall. 2. The underground continuous wall comprises an outside underground continuous vibration isolating wall and an inside mountain retaining wall, and the underground continuous vibration isolating wall is embedded with vibration isolating means. A continuous underground wall. 3. The anti-vibration means is continuously provided in a lateral direction orthogonal to the vertical direction and is also used for external waterproofing, according to claim 1 or claim 2. Underground continuous wall. 4. A guide for an excavator, wherein the vibration-proof means comprises a metal frame and a vibration-proof material attached to the frame, and excavates the ground adjacent to a part of the frame. Means are provided, The underground continuous wall in any one of Claim 1, 2 or Claim 3 characterized by the above-mentioned. 5. A vibration isolating means comprising a metal frame and a vibration isolating material adhered to the frame, wherein the vibration isolating means is embedded in a hole in an adjacent part of a part of the frame. The guide means according to claim 1 is provided, The underground continuous wall according to any one of claims 1 to 4. 6. The frame of the vibration-proof means is composed of a pair of H-shaped steels standing upright in a vertical direction and having web surfaces facing each other, and a frame horizontally stretched between flanges of the H-shaped steels. A pair of H
The H-section steel on the adjacent portion side of the section steel is provided with a guide section for an excavator or a guide section for a vibration isolator, and the underground continuation according to claim 4 or claim 5, wall. 7. The underground structure according to claim 4, wherein in the frame of the vibration isolator, a leading member for reducing immersion resistance is provided at the lower end in the vertical direction. Continuous wall. 8. A vibration isolating means comprising a slender rectangular metal frame and a vibration isolating material attached to the frame is formed, the ground is excavated by an excavator, and the excavated hole is placed in the excavated hole. After embedding the vibration isolator, excavating the ground with an excavator in the adjacent portion, and embedding the vibration isolator in the hole drilled in the adjacent portion is repeated, and the adjacent portion is continuously excavated. A method of constructing a continuous underground wall, characterized by: constructing by piercing and burying vibration damping means. 9. An excavator guide means is provided on one end side of the anti-vibration means, and the adjacent portion is excavated while the guided portion of the excavator is placed along the guide means. Item 9. A method for constructing an underground continuous wall according to Item 8. 10. An anti-vibration means guide means for an adjacent portion is provided on one end side of the anti-vibration means, and the adjoining portion of the anti-vibration means is guided along the guided portion of the adjacent anti-vibration means. 10. The method for constructing a continuous underground wall according to claim 8 or 9, wherein the shaking means is embedded in the drilled hole. 11. An excavator, characterized in that a guided means is provided on the side, which is guided by guide means for the excavator provided on the frame of the vibration isolating means.