JPH11200361A - Core material for earth retaining and wall surface member for earth retaining - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a core material for earth retaining and a wall surface member for earth retaining to be high in rigidity and excellent in cutoff ability. SOLUTION: A core material for earth retaining comprises a core material body 1 using an H-shaped rigidity body; engaging means 2a and 2b arranged in the longitudinal direction of the side end part of at least one flange part 10 of the core material body 1; a core material body wherein the overhang length in the direction of width of the flange part 10 is increased to a value higher than that of the other flange part 11; and a core material for earth retaining having a core for earth retaining having an engaging means arranged in the longitudinal direction of the side end in a longitudinal direction of one flange part. The core body comprises a plane member provided at an end part with an engaging part engaged with the engaging means of the core material for earth retaining.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is used for general shore retaining work (for example, underground continuous wall method, H steel horizontal sheet pile method, etc.) which is performed to prevent surrounding collapse when excavating the soil in underground construction and the like. TECHNICAL FIELD The present invention relates to a core material and a wall member for ridges.

[0002]

2. Description of the Related Art In excavation work for underground construction in subway construction, joint ditch construction, and large-scale construction work, in recent years, especially in the case of soil column construction methods that do not allow water to flow out during excavation. The highly water-based mountain retaining method is widely used. In particular, in urban areas, it can be applied even in a narrow space, and the construction work using this method has come to be used frequently because of its advantages such as simplification of the work process and shortening of the construction period. In the drilling machine used in the above construction method, a plurality of screw-type notched teeth called so-called augers are provided in parallel, and drilling the ground by drilling the ground while rotating these augers, FIG. As shown in FIG.
Is formed in a gourd shape in which a plurality of circles are arranged and some of them are overlapped. Then, an H-section steel or the like is built into the drilled hole 100 as a core material of the continuous wall.

[0003]

When the H-section steel is built as the core material for the continuous wall, the rigidity of the steel material is excellent, so that a structurally strong continuous side wall can be formed. However, continuous wall forming members such as soil cement between adjacent H-beams lose the soil on the digging side due to digging, and are affected by surrounding earth pressure and impacts during digging, causing cracks, In some cases, the water stopping performance may be deteriorated. If, instead of soil cement, a plate material or the like is inserted between them, water stopping properties cannot be expected in the first place, and it will rot with the passage of time. Further, since the H-section steels are independently built one by one, even if the drilled holes are not continuous in the lower part, they may remain as they are and may not be in a parallel state. Further, even if the verticality of the drilling is poor, the H-shaped steel is built as it is because of the independent H-shaped steel. When excavation is advanced along one flange side of the H-section steel for construction of an underground space in a state where a large gap is opened between the adjacent H-section steels, a tip of a digging blade of an excavator or the like is used. However, there is a case where soil cement or the like is scraped off during that time, which is a problem in terms of water stoppage and the like. In order to solve this, by using steel sheet piles as the core material, between the adjacent steel sheet piles, by the engagement means provided at these end sides, by continuously engaging the core material itself, In some cases, water stoppage is ensured. However, since the steel sheet pile has low rigidity, there is a danger of breakage due to earth pressure and the like, and it can be applied only in extremely limited cases such as when the depth is shallow.

The present invention has been made in view of the above problems of the prior art, and has as its object to provide a ridge core material and a ridge wall member which have high rigidity and excellent water stopping properties.

[0005]

SUMMARY OF THE INVENTION Therefore, a core material for a retaining member according to the present invention comprises a core body using an H-shaped rigid body, and a longitudinally extending end portion of at least one flange of the core body. It is a basic feature that the engaging means is provided. As the H-shaped rigid body used for the core material main body, other rigid materials having the same shape such as H-shaped steel, for example, boron, titanium, etc. can be appropriately used. Materials can also be used. The engaging means may be made of any material as long as the core material bodies can be engaged in the longitudinal direction.
For example, a configuration such as a folded key portion formed at both ends of the steel sheet pile may be used. In addition, the configuration of the wall surface member for buckling according to claim 3 includes a core body using an H-shaped rigid body and a core material for bucking having an engagement means provided in a longitudinal direction of an end side of one flange portion thereof, A flat member having an engaging portion at an end portion for engaging the engaging means of the buckle core material, and particularly to facilitate transportation and placement of these core materials and members. That is, as will be described later, as the configuration of the core material for the buckle, if the width direction overhang length of the flange portion on the side where the engagement means is provided is longer than that of the other flange portion, a plurality of piles are stacked. When transporting or placing
The overhanging flanges hinder, making it difficult to transport or stack a large number of pieces.
Therefore, by using the configuration of the core material for flattening and the flat member as described above, before assembling, a large number of core material for flattening and the flat member can be stacked and transported and placed, respectively. become. Also, at the time of assembling, the engaging means of the core material for the buckle is engaged with the engaging portion of the flat member,
What is necessary is just to continue in a fixed direction. Incidentally, the length of the plane member is arbitrary.

[0006]

The hole is drilled while the adjacent core members are engaged with each other by the above-mentioned engaging means, or while the anchoring core material and the plane member are connected by engaging the engaging means with the engaging portion. By building it inside and forming a continuous wall, the horizontal continuity and verticality of the continuous wall itself become better than when an independent H-shaped steel was built, Excavation can be easily performed along the flange side engaged with the engagement means at the time of excavation work, or along the flange side and the plane side engaged with the engagement means at the engagement portion. Of course, there is no crack in the soil or the like, the water stopping property can be ensured, and since the core material main body is an H-shaped rigid body, it can sufficiently withstand the earth pressure.

As shown in FIG. 2, the adjacent hole is usually formed in a plane gourd shape in which a plurality of circles are arranged and some of them are overlapped with each other. If the engaging means is provided on both sides of the flange portion of the H-shaped rigid body, as shown in FIG. 4, the constricted portion of the gourd shape obstructs, and the core material body has a large structure. In fact, not all of these engaging means can be engaged. Therefore, if an engaging means is provided on one of the flange portions, and the widthwise extension length of the flange portion on the side where the engaging means is provided is made longer than that of the other flange portion, FIG. As shown in the above, only the constricted part protrudes between the flange parts without the engagement means,
The portion provided with the engagement means can be securely engaged without being disturbed by the constricted portion. Therefore, the core material itself can have a considerably large structure, and due to its rigidity, it can sufficiently withstand a large earth pressure.

[0008] Further, as described above, if the length of the flange portion on the side where the engaging means is provided is longer than that of the other flange portion, a plurality of the core members for the retaining member are provided. When transporting or placing
The overhanging flanges hinder, making it difficult to transport or stack a large number of pieces.
Therefore, by using the configuration of the core material for flattening and the flat member according to claim 3, before assembling, a large number of the core material for flattening and the flat member can be stacked and transported and placed, respectively. become.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the present invention will be described below. FIG. 1 shows a configuration of an embodiment having a configuration of a core material for a shoring according to the present invention. According to FIG.
This configuration has a core material main body 1 and engagement means 2 a and 2 b provided in the longitudinal direction of an end side of one flange portion 10 of the core material main body 1.

The core body 1 is made of H-shaped steel. Also, the widthwise extension lengths l1 and l2 of the flange portion 10 on the side where the engagement means 2a and 2b described later are provided.
Is longer than the lengths l3 and l4 of the other flange portion 11, and is slightly different in shape from a normal one.

As shown in the figure, the engaging means 2a and 2b are formed in a key-shaped structure having a U-shaped cross section, and the inner surfaces of the right and left engaging means 2a and 2b are released in opposite directions. It is in the state that was done.

Next, a description will be given of a procedure for embedding the above configuration in a hole drilled in the ground. As shown in FIG. 2, the hole 100 is usually formed in a plane gourd shape in which a plurality of circles are arranged and a part of them is overlapped (of course, the shape is not limited to this shape, but is like this shape). ), The interior of which is already filled with soil cement. The core material body 1 is sequentially inserted there. At this time, as shown in FIG. 3, the core material main body 1 is inserted while the one engaging means 2a of the core material main body 1 and the other engaging means 2b of the adjacent core material main body 1 are engaged with each other. Repeat as many times as necessary.

In the above configuration, the continuous core can be built in the hole while the adjacent cores are engaged with each other by the engagement means 2a and 2b, so that a continuous wall can be formed. At the same time, it can withstand large earth pressure. Further, since the widthwise extension lengths l1 and l2 of the flange portion 10 on the side where the engagement means 2a and 2b are provided are longer than the lengths l3 and l4 of the other flange portion 11, as shown in FIG. In the meantime, a gourd-shaped constricted portion of the drilled hole protrudes between the flange portions without the engaging means, and in the portion provided with the engaging means, without being disturbed by the constricted portion, It can be brought into a firmly engaged state. Therefore, the core material body 1
It is possible for itself to use a rather large structure and, due to its rigidity, to withstand even greater earth pressures.

In this configuration, a steel H-shaped rigid body is used, but the material is not particularly limited as long as it has appropriate rigidity. There is no particular limitation on the shape of the engagement means 2a and 2b, and it is more preferable that the engagement means 2a and 2b have a strong and watertight structure.

FIG. 5 and FIG. 6 show an embodiment of a wall member for buckling having a configuration of a core material for buckling and a flat member according to claim 3 of the present invention. According to these figures, a bucking core 12 having a core main body 1 made of H-section steel and engaging means 2a and 2b provided in a longitudinal direction of an end side of one flange portion 10; Engagement means 2a and 2b for core material 12
And a flat member 3 (having any length) having engagement portions 3a and 3b at its ends. The state shown in FIG. 5 is a state assembled during drilling.
Before assembling, they can be separated and transported and placed as shown in FIG. For this reason, it is possible to transport and place a large number of pieces.

[0016]

According to the construction of the present invention described in detail above, the adjacent core members are engaged with each other by the engaging means, and are built into the drilled hole, or the engaging means and the engaging portion are assembled. Since the continuous core can be formed by drilling the adjacent core material and the flat member into the drilled hole, the horizontal continuity of the continuous wall itself can be reduced compared to when an independent H-section steel is built. The verticality in the downward direction is improved, and the excavation can be easily performed along the flange side engaged by the engaging means during the excavation work for constructing the underground space. Of course, there is no crack in the soil or the like, the water stopping property can be ensured, and since the core material main body is an H-shaped rigid body, it can sufficiently withstand the earth pressure.
Further, if the widthwise extension length of the flange portion on the side where the engaging means is provided is longer than the widthwise extension length of the other flange portion, the constriction of the hole is formed between the flange portions without the engagement means. Part protrudes, in the part provided with the engagement means, without being disturbed by the constricted part,
It can be brought into a firmly engaged state.
For this reason, the core material itself can have a considerably large structure, and due to its rigidity, it can sufficiently withstand a large earth pressure. Further, as described in claim 3, by using the configuration of the buckle core material and the flat member, before assembly, a large number of buckle core materials and flat members can be stacked and transported and placed, respectively. become able to. In the description, the anchoring core material to be provided to the continuous wall is mainly described, but it is also possible to use the anchoring core material in the soil while directly engaging the engaging means, and the driving method is particularly limited. Not necessarily.

[Brief description of the drawings]

FIG. 1 shows a configuration of an embodiment having a configuration of a core material for a shoring according to the present invention.

FIG. 2 is an explanatory view showing a state of a hole formed in the ground in a plane gourd shape.

FIG. 3 is an explanatory diagram showing a state in which a configuration according to an embodiment of the present invention is erected for forming a continuous wall during drilling.

FIG. 4 is a perspective view showing a state in which a core material for a buckle having engagement means provided on both flange portions is embedded in a hole, the constricted portion of the hole overlaps with the engagement means, and the engagement is prevented. It is explanatory drawing which shows the state which becomes impossible.

FIG. 5 is an explanatory diagram showing a configuration according to an embodiment of claim 3, which is built for forming a continuous wall during drilling.

FIG. 6 is a plan view showing a state where the above configuration is separated.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Core material main body 2a, 2b Engagement means 3 Plane member 3a, 3b Engagement part 10, 11 Flange part 12 Core material for mountain retaining 100 Drilling

Claims (3)

[Claims] 1. A core for mountain stays, comprising: a core material main body using an H-shaped rigid body; and engaging means provided in a longitudinal direction of an end portion of at least one flange portion of the core material main body. Wood. 2. The buckling core material according to claim 1, wherein the engaging means is provided on one of the flange portions, and a width of the flange portion on the side where the engaging means is provided is extended in a width direction. 2. The retaining core material according to claim 1, wherein the other flange portion is longer than the other flange portion. 3. An anchoring core having a core body using an H-shaped rigid body and engaging means provided in a longitudinal direction of an end side of one of the flanges, and an engaging means of the anchoring core. And a flat member having an engaging portion at an end portion for engaging with the wall member.