JP4023532B2 - Underground continuous wall and its construction method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides, for example, an underground continuous wall, a construction method thereof, and a method for constructing an underground structure, which are provided to block vibration from a subway or a road adjacent to the underground structure. Related to excavators.
[0002]
[Prior art]
Conventionally, when constructing underground structures that do not like ambient noise, such as acoustic halls and opera houses, a high-performance anti-vibration structure that blocks vibration from adjacent subways and motorways is required. Become. For example, as shown in FIGS. 12 (A) and 12 (B), the anti-vibration structure has a mountain retaining wall 22 in the vicinity of a subway box culvert 21 or a road / railway. Later, a vibration isolating material 24 such as a vibration isolating rubber is fixed to the retaining wall 22 at a desired location, and then a concrete concrete frame 23 is constructed. Thus, there is known a configuration in which the vibration isolator 24 is disposed between the outer peripheral wall 23a of the concrete concrete frame 23 and the retaining wall 22 (Japanese Patent Laid-Open No. Hei 8-41869).
[0003]
[Problems to be solved by the invention]
However, in the above-mentioned vibration-proof structure, the excavation depth is deepened and the vibration-proofing material is performed after the construction of the retaining wall, so that the construction period becomes long and the cost increases. Furthermore, since a high-performance anti-vibration structure is required, there is a problem that workability becomes difficult. The underground continuous wall, the construction method thereof, and the excavator according to the present invention have been proposed to solve such problems.
[0004]
[Means for Solving the Problems]
The gist for solving the above-mentioned problem of the underground continuous wall according to the present invention is that the vibration isolation means provided on the underground continuous wall and also used for external waterproofing is a vibration isolation wall and a vibration isolation wall for a gap. The anti-vibration wall is composed of a metal casing and an anti-vibration rubber adhered to the casing, and the metal casing is erected in a vertical direction and has a pair of web surfaces facing each other. An H-shaped steel and a frame horizontally mounted between flanges on one side of the pair of H-shaped steels. The anti-vibration rubber is attached to the frame side, and the cutting provided in the lateral direction of the pair of H-shaped steels. An H-shaped steel adjacent to the hole has an L-shaped positioning frame fixed to the H-shaped steel web in the vertical direction over substantially the entire length, and the L-shaped positioning frame and the flange on one side of the H-shaped steel. The L-shaped positioning is used as a guide portion for embedding the anti-vibration wall for the gap. Gap between the other side of the flange of the frame and the H-section steel has a guide portion for an excavator, the gap for anti-isolating wall becomes attached to the frame by stacking a plurality of vibration-proof rubber, the gap The anti-vibration means is attached to the guide portion for embedding the anti-vibration wall for the gap in the H-shaped steel on one side of the anti-vibration wall so that the end of the anti-vibration wall protrudes laterally. The gap anti-vibration wall is buried between the guide portions for the gap anti-vibration wall of the H-shaped steel web facing each other between the anti-vibration walls adjacent to each other with a gap in the ground drilling hole. The vibration isolating means is continuously embedded in the lateral direction in the hole excavated in the ground .
[0007]
The gist for solving the above-mentioned problem of the construction method of the underground continuous wall according to the present invention is that the vibration isolating means used for both the underground continuous wall and the outer waterproofing is the anti-vibration wall and the anti-vibration wall for the gap. The vibration-proof wall is composed of a metal case and a vibration- proof rubber adhered to the case, and the metal case is erected in the vertical direction so that the web surface is opposed to the case. A pair of H-shaped steels and a frame that is horizontally mounted between flanges on one side of the pair of H-shaped steels, and the anti-vibration rubber is attached to the frame side, and the horizontal direction of the pair of H-shaped steels. An L-shaped positioning frame is fixed to the H-shaped steel adjacent to the drilled hole on the H-shaped steel web over the entire length in the vertical direction, and the L-shaped positioning frame and the H-shaped steel The gap between the flange on one side serves as a guide portion for embedding the vibration isolating wall for the gap, and the L-shaped Gap between the other side of the flange-decided Me frame and the H-section steel has a guide portion for an excavator, the gap for anti-isolating wall becomes attached to the frame by stacking a plurality of vibration-proof rubber, The gap anti-vibration wall is attached to the guide part for embedding the anti-vibration wall for the gap in one H-shaped steel of the anti-vibration wall so that the end of the anti-vibration wall protrudes laterally. A vibration means is constructed, the ground is excavated by an excavator, the vibration isolation wall is embedded in the excavated hole, and then guided by a guide portion that is a guide means for the excavator in an adjacent portion of the hole The excavator continuously excavates the ground without overlapping the hole, and the vibration isolating means is embedded in the anti-vibration wall previously embedded in the hole drilled in the adjacent portion. The end of the anti-vibration wall for the gap in the anti-vibration means is fitted to the guide part While the guide Te laterally is embedded by continuous, then a gap in the next vibration isolation means in the guide portion of the gap for the anti-isolating wall drilling and the buried anti-vibration unit of the ground continuous by the excavator It is to construct an underground continuous wall that is also used for external waterproofing by repeatedly embedding an anti-vibration means that is fitted in an end portion of the anti-vibration wall and is continuous in the lateral direction .
[0010]
According to the underground continuous wall and the construction method thereof according to the present invention, the vibration isolation means is embedded in the underground continuous wall, so that vibrations from the subway, roads and railways around the building are effectively cut off. The In addition, even when the excavation depth is deep, the underground continuous anti-vibration wall is arranged outside the retaining wall, blocking vibration at a position close to the vibration source, and the anti-vibration effect by the anti-vibration means is demonstrated with high performance .
[0011]
Moreover, since the said vibration isolating means is continuously provided in the horizontal direction orthogonal to a perpendicular direction, it will play the role of external waterproofing of an underground structure. Furthermore, since the vibration isolating means is provided with guide means for excavators that excavate the ground of the adjacent portion, it is possible to save the trouble of moving the excavator every other place as in the prior art. In addition, the excavator can be positioned easily while being guided. Further, since the vibration isolating means is provided with guide means for the vibration isolating means to be embedded in the adjacent hole, the embedding work of the vibration isolating means becomes efficient.
[0013]
In the construction method of the underground continuous wall according to the present invention, before the retaining wall is constructed, or along with the construction of the continuous wall that is the retaining wall, the anti-vibration means is continuously embedded in the adjacent portion and the vibration isolating means is embedded. Since the wall is constructed, the construction method according to the present invention requires less labor and shortens the construction period than the conventional method in which the anti-vibration means is provided inside the retaining wall after the construction of the retaining wall. Furthermore, the movement time of the wall excavator is shortened, so that no labor is required.
[0014]
In addition, since the continuous wall is constructed by burying 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 constructed inside the mountain retaining wall. Effective area can be expanded and land can be used effectively.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Next, the underground continuous wall, its construction method, and the excavator according to the present invention will be described with reference to the drawings. In order to facilitate understanding of the invention, portions corresponding to the conventional example are denoted by the same reference numerals as those of the conventional example.
[0017]
The underground continuous wall 1 of the present invention is constructed to block vibration from a subway, a road and a railroad around an underground structure, and the structure is an excavator as shown in FIG. The soil cement 3 of the drilling hole 2 excavated in the ground by A is constructed by embedding a vibration isolation wall 4 and a gap vibration isolation wall 4a as vibration isolation means.
[0018]
In addition, as shown in FIG. 2, since the depth of the subway 21 is deep, when the excavation depth has to be deepened in order to construct a vibration isolation wall in the adjacent area, the vibration isolation means is replaced with the soil cement 3. The buried underground vibration isolating wall 1a is constructed, and the retaining wall 22 is constructed inside thereof. The underground continuous vibration isolating wall 1a and the retaining wall 22 form the underground continuous wall 1, and further The main housing 23 is constructed on the inner side.
[0019]
The anti-vibration wall 4 and the anti-vibration wall 4a for the gap, which are the anti-vibration means, are configured by laminating a plurality of anti-vibration rubbers. Therefore, the continuous wall in which the anti-vibration wall 4 is embedded is continuous in the horizontal direction orthogonal to the vertical direction (hereinafter simply referred to as the horizontal direction), so the underground continuous wall 1 shown in FIG. 1 or the ground shown in FIG. The middle continuous vibration-proof wall 1a serves as a vibration-proof wall for the main housing 23 and also serves as an underground continuous outer waterproof wall as an external waterproof.
[0020]
The construction method of the underground continuous wall 1 will be described. First, a vibration isolating means is formed before ground excavation. As shown in FIGS. 3 to 5, the anti-vibration wall 4 is vertically disposed between a pair of H-shaped steel 5 standing in the vertical direction and having the web surface 5 a opposed thereto, and a flange 5 b of the H-shaped steel 5. A rectangular frame is formed by a steel frame 6 and a vibration-proof rubber attachment plate 6a (see FIG. 5) that are horizontally mounted by welding at appropriate intervals.
[0021]
A laminate of a plurality of (four in the illustrated example) anti-vibration rubbers 7 on the frame 6 side is sandwiched by a steel frame 8 and fixed by bolts 9a and nuts 9b. Let On the outside of the web surface 5a, an L-shaped positioning frame 10 is welded and fixed over the entire length in the vertical direction. As shown in FIG. 3A, the anti-vibration wall 4a for the gap is provided to make the anti-vibration wall 4 continuous in the lateral direction. The gap anti-vibration wall 4a is formed by laminating a plurality of anti-vibration rubbers 7, sandwiched between frames 6 and 8, and attached with bolts 9a and nuts 9b. An anti-vibration means is constructed by fitting the end portion of the guide portion for embedding the anti-vibration wall for the gap in one of the H-shaped steels 5 so as to protrude laterally.
[0022]
As shown in FIG. 3A, the positioning frame 10 is provided on the web surface of the right H-shaped steel 5 in order to receive the vibration isolation wall 4a for the adjacent portion, and at the same time, the adjacent portion. The gap anti-vibration wall 4a becomes a guide portion 10a which is a guide means at the time of the work of being buried in the vertical direction. The positioning frame 10 also forms a guide portion 10b which is a guide means for an excavator described later.
[0023]
The anti-vibration wall 4 shown in FIG. 3B is not provided with the anti-vibration wall 4a for the gap, and this is embedded in the hole first drilled by excavation work. This is because there is no drilling hole in the left side adjacent portion.
[0024]
Further, in the case where the casing has to be formed to be several tens of meters long in the vertical direction, in order to connect, as shown in FIGS. 4 and 6, the connecting plate 11 having a bolt hole 11a drilled is used. Successful connection with bolts and nuts.
[0025]
Furthermore, as shown in FIG. 4, in the lower part (the lower end part when standing upright in the vertical direction) of the casing, in order to reduce the resistance force when immersing into the soil cement 3, it is a spire-like metal A leading member 12 is provided. In order to protect the lower portion, a U-shaped frame made of hard metal may be used instead of the leading member 12 having a spire shape.
[0026]
Next, as shown in FIG. 7, the excavator A used in the present invention is a triple drilling machine including a three-axis auger that is driven to rotate simultaneously. In this excavator A, as shown in FIGS. 7 and 8, a side cutter 13 is provided in the middle of the three-axis auger so as to eliminate the presence of the remaining soil portion 14 that becomes the excavated residual soil. Is provided with a guided portion 15 projecting in the lateral direction.
[0027]
As shown in FIGS. 8 to 9, the guided portion 15 is loosely fitted to guide portions 10 a and 10 b formed by the positioning frame 10 on the web surface 5 a of the H-shaped steel 5 in the vibration isolation wall 4. The soil cement 3 that is guided in the direction and is semi-solidified or solidified is excavated.
[0028]
Such excavator A is prepared and the ground is excavated. As shown in FIG. 1, in STEP 1, the head portion at the tip is positioned with a marking or the like provided on a guide ruler with a normal triple drilling machine not provided with the guided portion 15, and the triple auger is rotated. Drive to drill holes in the ground.
[0029]
The excavated hole is filled with soil cement 3 by mixing the cement milk and soil with a cement-based suspension (cement milk) discharged and injected from the tip of the auger (head portion). . Before the soil cement 3 is solidified, an anti-vibration wall 4 prepared in advance is embedded.
[0030]
The anti-vibration wall 4 has no gap anti-vibration wall 4a as shown in FIG. In order to embed the anti-vibration wall 4 in the drilling hole 2 in the STEP 1, the tower in the excavator is used to lift the anti-vibration wall substantially vertically, with the anti-vibration rubber 7 facing outward and the leading member 12 facing down, At first, it penetrates with its own weight, and then it is pushed in with monken etc. and buried. When the excavation depth is deep, as shown in FIGS. 10 (A) and 10 (B), the vibration isolation wall 4 is embedded while appropriately connecting with the connecting plate 11 with bolts and nuts.
[0031]
Then, after the soil cement 3 is semi-solidified or solidified in the drilling hole 2 in STEP 1, the adjacent portion is continuously excavated in STEP 2 with the right direction as the drilling direction in FIG. 1. The soil cement 3 in STEP 1 and the soil cement 3 in STEP 2 in the adjacent portion are good as long as they are not turbid.
[0032]
From this STEP2, 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 isolating wall 4 which has been embedded in STEP 1, and the triple auger is driven to rotate. Start drilling. The guided portion 15 guided in the vertical direction along the guide portions 10a and 10b of the vibration proof wall 4 cuts the semi-solidified or solidified soil cement 3 and drills a hole in the ground of the adjacent portion.
[0033]
Then, before the soil cement 3 of the hole 2 in the STEP 2 is solidified, the anti-vibration wall 4 having the anti-vibration wall 4a for the gap shown in FIG. To be buried. At this time, the left end portion of the vibration isolating rubber 7 of the gap vibration isolating wall 4a is fitted to the guide portion 10a so as to be guided in the vertical direction. Thus, the anti-vibration wall 4 is smoothly penetrated into the soil cement 3 and embedded by the guide portions 10a and 10b formed by providing the positioning frame 10.
[0034]
In this way, as shown in FIG. 1, the excavator A having the guided portion 15 drills in the drilling direction and embeds the vibration isolation wall 4. As shown in FIG. 11 (A), the work can be continuously performed along the drilling direction without substantially overlapping the adjacent portion. Therefore, a total of nine holes are made when excavated three times.
[0035]
On the other hand, as shown in FIG. 11B, in the drilling work by the conventional excavator, the third excavation is performed across the first and second times, so that a total of seven holes are formed. By repeating the drilling operation, the difference in the traveling speed is further increased. As described above, in the present invention, the progress in the drilling direction is faster than the progress speed of the conventional drilling work, and the construction period is shortened.
[0036]
Thus, the excavation of the ground and the embedding of the anti-vibration wall 4 are repeated, and the anti-vibration wall 4 is embedded, as shown in FIG. 1, from the underground continuous wall 1 or the underground continuous anti-vibration wall 1a and the retaining wall 22. The underground continuous wall 1 shown in FIG. 2 is constructed. The underground continuous wall 1 can eliminate the influence of vibration from a subway or the like close to the underground structure to be constructed by the vibration isolation means including the vibration isolation wall 4.
[0037]
In addition, in the underground continuous wall 1 shown in FIG. 1, when the anti-vibration effect is fully expected, the gap anti-vibration wall 4a may be omitted. In this case, since the vibration-proof wall 4 is not continuous, it cannot be used as an external waterproof.
[0038]
【The invention's effect】
As described above, in the underground continuous wall according to the present invention, the anti-vibration means provided on the underground continuous wall and also used for external waterproofing is the anti- vibration wall and the anti-vibration wall for the gap. The wall is made of a metal casing and a vibration- proof rubber adhered to the casing, and the metal casing is a pair of H-shaped steels that are erected in the vertical direction and whose web surfaces face each other. And a frame that is horizontally mounted between the flanges on one side of the pair of H-shaped steels, and the anti-vibration rubber is adhered to the frame side, and adjacent to the drilling holes provided in the lateral direction of the pair of H-shaped steels. to the adjacent side of the H-shaped steel, the positioning frame L-shaped in the web of the H-section steel is secured over substantially the entire length in the vertical direction, the gap between one side flange of the L-shaped positioning frame and the H-section steel Becomes a guide part for embedding the vibration isolating wall for the gap, and the L-shaped positioning frame Gap between the other side of the flange of the H-section steel has a guide portion for an excavator, the gap for anti-isolating wall becomes attached to the frame by stacking a plurality of vibration-proof rubber, the gap for anti The vibration isolating means is constituted by attaching a vibration wall to the guide portion for embedding the vibration isolating wall for the gap in one of the H-shaped steels of the vibration isolating wall and projecting the end portion in a lateral direction. The gap anti-vibration wall is embedded between the gap anti-vibration wall guide portions of the H-shaped steel web facing each other between the adjacent anti-vibration walls with a gap in the ground hole. Since the vibration means is continuously embedded in the hole excavated in the ground in the horizontal direction and the vibration isolation wall is placed close to the vibration source such as a subway, the effect of vibration from the vibration source is effective. Can be suppressed. Furthermore, the anti-vibration wall is embedded in the continuous wall or is constructed outside the mountain retaining wall, and the effective area of the land can be expanded and the land can be effectively used. is there.
[0039]
The anti-vibration means is provided continuously in the transverse direction perpendicular to the vertical direction and is also used for external waterproofing, so that it is possible to greatly reduce the trouble of constructing the external waterproofing of underground structures and reduce costs. It will be.
[0040]
The anti-vibration means comprises a metal case and a vibration-proof material adhered to the case, and a guide unit for an excavator for excavating the ground of an adjacent portion is provided in a part of the case. As a result, the excavator can continuously excavate the adjacent ground, and an excellent effect is obtained that the drilling progress is increased and the construction period is shortened.
[0041]
The anti-vibration means comprises a metal case and an anti-vibration material attached to the case, and a guide means for the anti-vibration means embedded in a hole in an adjacent portion in a part of the case. Since it is provided, there is an excellent effect that the work of embedding the vibration isolating means in the drilling hole can be performed smoothly.
[0042]
The frame of the vibration isolating means is composed of a pair of H-shaped steels standing in the vertical direction and having the web surfaces facing each other, and a frame horizontally mounted between the flanges of the H-shaped steels. Of these, the H-shaped steel on the adjacent portion side is provided with a guide portion for an excavator or a guide portion for vibration isolation means, so that a housing can be easily created using the H-shaped steel .
[0043]
According to the construction method of the underground continuous wall of the present invention, the vibration isolating means used for both the underground continuous wall and the outer waterproofing is composed of the vibration isolating wall and the anti-vibration wall for the gap. and manufacturing rail body consists of a vibration-proof rubber adhered to the該框body, the metal frame body has a pair of H-shaped steel with a web surface facing erected vertically, the pair An adjacent frame side adjacent to a drilling hole provided in a lateral direction of the pair of H-shaped steels, wherein the anti-vibration rubber is attached to the frame side, and the frame is placed between flanges on one side of the H-shaped steel. In the H-shaped steel, an L-shaped positioning frame is fixed to the H-shaped steel web in the vertical direction over substantially the entire length, and the gap between the L-shaped positioning frame and the flange on one side of the H-shaped steel prevents gaps. It becomes a guide part for embedding the vibration wall, and the other side of the L-shaped positioning frame and the H-shaped steel Gap between the flange has a guide portion for an excavator, the gap for anti-isolating wall becomes attached to the frame by stacking a plurality of vibration-proof rubber, the is the gap for anti-isolating wall proof isolating wall The anti-vibration means is constructed by fitting the end part of the guide part for embedding the anti-vibration wall for the gap in one of the H-shaped steels so as to project laterally, and the ground is removed by an excavator. Excavating, burying the anti-vibration wall in the excavated hole, and then being guided by a guide portion that is a guide means for an excavator in an adjacent portion of the hole without overlapping the hole with the excavator The ground is excavated continuously , the vibration isolating means is inserted into the hole drilled in the adjacent portion, and the gap anti-vibration means in the anti-vibration means is provided in the guide portion of the anti-vibration wall in the anti-vibration wall previously embedded. continuous of laterally while guiding by fitted the ends of the isolating wall It was buried Te,
After that, the excavator continuously excavates the ground and inserts the end portion of the gap anti-vibration wall in the next anti-vibration means into the guide portion of the gap anti-vibration wall of the embedded anti-vibration means. It is a construction method that builds a continuous underground wall that is also used for waterproofing by repeating the installation of vibration isolation means that are continuously connected to each other, so the construction period for providing vibration isolation means and the work period for drilling work are significantly shortened compared to the conventional method. This is an excellent effect.
[0044]
Further, a guide means for the excavator is provided at one end side of the vibration isolating means, and the adjacent portion is excavated while keeping the guided portion of the excavator along the guide means, and further, one end side of the vibration isolating means. Is provided with a guide means for the vibration isolating means of the adjacent part, and the vibration isolating means of the adjacent part is embedded in the drilling hole while the guided part of the vibration isolating means of the adjacent part is placed along the guide means. Efficiency is improved and construction period is shortened.
[0045]
Furthermore, since the guide means for the excavator and the anti-vibration wall for the gap provided in the frame of the anti-vibration means are provided on the side, the adjacent ground can be continuously connected without overlapping in the drilling direction. As well as being able to excavate, it is possible to smoothly penetrate the anti-vibration wall for the gap, and it is possible to construct a continuous anti-vibration wall and an outer waterproof wall, so that the vibration is cut off with high performance and the underground water underground This prevents the penetration into the structure and has an excellent effect that the construction period of the continuous wall can be shortened.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a construction method of an underground continuous wall according to the present invention.
FIG. 2 is a cross-sectional view of the continuous wall in the case of the underground continuous wall according to the present invention, comprising an outer underground continuous anti-vibration wall and an inner mountain retaining wall.
FIGS. 3A and 3B are plan views (A) and (B) of an anti-vibration wall in the underground continuous wall according to the present invention. FIGS.
FIG. 4 is a side view of the vibration isolating wall in the underground continuous wall according to the present invention.
5 is an enlarged side view of a portion B in FIG.
FIG. 6 is a front view (A) of a connecting plate and a plan view (B) in use.
FIG. 7 is a front view of an excavator A according to the present invention.
FIG. 8 is an explanatory diagram of a method for constructing an underground continuous wall according to the present invention.
FIG. 9 is an enlarged explanatory diagram of a C part in FIG. 8;
FIGS. 10A and 10B are explanatory views (A) and (B) for explaining the underground continuous wall construction method according to the present invention.
FIGS. 11A and 11B are explanatory views (A) and (B) for explaining a drilling method according to the present invention and a conventional drilling method.
FIGS. 12A and 12B are cross-sectional views (A) and (B) showing the structure of the underground continuous wall according to the conventional example.
[Explanation of symbols]
1 underground continuous wall, 1a underground continuous anti-vibration wall,
2 drilling holes, 3 soil cement,
4 Anti-vibration wall, 4a Anti-vibration wall for gap,
5 H steel, 5a web surface,
5b, 5c flange, 6 frame,
6a Anti-vibration rubber attachment plate, 7 Anti-vibration rubber,
8 frames, 9a, bolts,
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 A concrete concrete frame.

Claims (2)

The anti-vibration means that is provided on the underground continuous wall and is also used for external waterproofing is the anti-vibration wall and the anti-vibration wall for the gap, and the anti- vibration wall is attached to the metal case and the case. Made of anti-vibration rubber ,
The metal casing is composed of a pair of H-shaped steels standing in the vertical direction and having web surfaces facing each other, and a frame horizontally placed between flanges on one side of the pair of H-shaped steels,
The anti-vibration rubber is attached to the frame side,
Of the pair of H-shaped steels, the L-shaped positioning frame is fixed to the H-shaped steel adjacent to the drilling hole provided in the lateral direction on the H-shaped steel web in the vertical direction over substantially the entire length,
The gap between the L-shaped positioning frame and the flange on one side of the H-shaped steel serves as a guide portion for embedding a vibration isolation wall for the gap, and the L-shaped positioning frame and the flange on the other side of the H-shaped steel The gap is a guide part for the excavator,
The gap anti-vibration wall is formed by laminating a plurality of anti-vibration rubbers and attached to a frame, and the gap anti-vibration wall is used for embedding the gap anti-vibration wall in one H-shaped steel of the anti-vibration wall. The anti-vibration means is constructed by fitting the end of the guide portion so as to protrude laterally,
An anti-vibration means for the gap is embedded between the guide portions for the anti-vibration wall of the H-shaped steel web facing each other between the anti-vibration walls adjacent to each other with a gap in the ground hole. Is embedded continuously in the hole excavated in the ground in the lateral direction,
Underground continuous wall characterized by. The anti-vibration means used for both the underground continuous wall and the outer waterproofing is the anti-vibration wall and the anti-vibration wall for the gap, and the anti- vibration wall is attached to the metal case and the case. and consists of a rubber cushion, the metal frame body is laterally placed on the web surface erected in a vertical direction and a pair of H-shaped steel was opposed, between one side of the flanges of the pair of H-type steel The anti-vibration rubber is affixed to the frame side, and the H-shaped steel on the adjacent portion side adjacent to the drilling hole provided in the lateral direction of the pair of H-shaped steels is attached to the H-shaped steel web. An L-shaped positioning frame is fixed over the entire length in the vertical direction, and a gap between the L-shaped positioning frame and the flange on one side of the H-shaped steel serves as a guide portion for embedding the vibration isolating wall for the gap. , The gap between the L-shaped positioning frame and the flange on the other side of the H-shaped steel Has become a de part,
The gap anti-vibration wall is formed by laminating a plurality of anti-vibration rubbers and attached to a frame, and the gap anti-vibration wall is used for embedding the gap anti-vibration wall in one H-shaped steel of the anti-vibration wall. The anti-vibration means is constructed by fitting the end of the guide portion so as to protrude laterally,
Excavating the ground with an excavator, burying the anti-vibration wall in the excavated hole,
Then, excavating the ground continuously without overlapping the hole with the excavator while being guided by a guide portion that is a guide means for excavator in the adjacent portion of the hole,
The anti-vibration means is fitted in the hole cut in the adjacent portion, and the end portion of the anti-vibration wall for the gap in the anti-vibration means is fitted in the guide portion of the anti-vibration wall for the gap in the anti-vibration wall previously embedded. And let it be embedded in the horizontal direction while being guided,
After that, the excavator continuously excavates the ground and inserts the end portion of the gap anti-vibration wall in the next anti-vibration means into the guide portion of the gap anti-vibration wall of the embedded anti-vibration means. Constructing a continuous underground wall that is also used for waterproofing by repeatedly burying the vibration isolation means
The construction method of the underground continuous wall characterized by this.

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