JP4601400B2 - Construction method and structure at the intersection of facilities - Google Patents

Description

  The present invention is a non-open-cut method in which a plurality of elements are arranged substantially perpendicular to the length direction in a construction in which another traffic facility or another facility is crossed with an existing traffic facility. The present invention relates to a construction method for a structure at an intersection between facilities that can be suitably used for the structure to be installed, and the structure.

In recent years, in urban areas and the like, there is an increasing number of cases where a structure in which a plurality of elements are juxtaposed in a direction substantially orthogonal to the length direction in the ground by the non-open cutting method at the intersection of transportation facilities. Yes. This is especially true when building new tracks and roads that cross the track or under the road, minimizing the impact on the existing track and road pavement, and the cross-section of the crossing structure is becoming larger. This corresponds to the fact that the extension has become longer, and cannot be handled by the digit format.
Specifically, by pulling a steel element having a substantially rectangular cross-section from one side and pulling it into the ground and fitting adjacent steel elements together with each other, by scraping the soil inside, Many methods for constructing a box-like or tunnel-like structure without cutting are employed (for example, Patent Documents 1 and 2).
In addition, the steel element used is painted with a rust preventive paint from the viewpoint of corrosion prevention.
JP 2000-220375 A JP 2000-120372 A

However, it is practically difficult to prevent corrosion over a long period of time by coating with a rust-proof paint, and the structure is maintained in strength by fitting the joints between steel elements. For this reason, the durability of the entire structure may be impaired by corrosion due to groundwater or rainwater, corrosion due to long-term passage, or the like.
Then, this invention aims at proposing the construction method of a structure which can be applied in the intersection of traffic facilities and the reinforce effect of the steel element of the said structure is remarkably high.
It can be applied not only to intersections between transportation facilities but also to intersections between transportation facilities and other facilities such as sewers and rainwater drainage channels. In that case, it is necessary to reduce the roughness coefficient in order to allow water to flow. However, it aims at proposing the method which can construct a high intensity | strength structure easily.

The present invention has been proposed in view of the above, and draws a steel element having a substantially rectangular cross section into the ground substantially perpendicular to the length direction of an existing facility, and connects adjacent steel elements with joints. A first step of constructing a box-shaped or tunnel-shaped structure by combining them so as to fit together, and a mounting rod projecting from the side surface portion of the steel element constituting the inner surface of the structure, A second step of fastening a high nut to the tip and fixing all the screw rods to the fastened nut, and a face wall plate in which a fixing metal fitting having an insertion hole is embedded in advance, and the structure with a predetermined distance A third step of inserting the tips of all the screw rods through the insertion holes of the face wall plate and fastening the nuts and fixing them, and repeating these operations to form a plurality of face wall plates in a single plane A fourth step to be disposed on the plurality and a plurality of disposed Relates wall plate and construction methods of the structure at the intersection of the facility each other which is characterized in that a fifth step of filling a filler between the structure comprising a plurality of steel elements.
In addition, as a steel element, generally three types of steel elements (reference | standard, a corner part, T-shaped part) with a rectangular cross section and a steel element (general part element) with a substantially U-shaped cross section are used. However, in the present specification, it is expressed as a substantially rectangular cross section and is not particularly distinguished.

In any one of the third to fifth steps of the above construction method, it is desirable to cut the tips of all the excess screw rods.
The face wall plate is selected from polymer-impregnated concrete, resin concrete, and fiber reinforced concrete, and the filler is preferably mortar or concrete.

  The present invention also proposes a structure to be constructed by the above construction method, in which a plurality of rectangular steel elements having a rectangular cross section are arranged side by side in a direction substantially orthogonal to the length direction of an existing facility. A mounting bracket is projected inside the box-shaped or tunnel-shaped structure constructed as described above, and all screw rods are extended to the mounting rod via a high nut, and a fixing bracket having an insertion hole therein is previously provided. By fixing the tip of all the screw rods to the fixing bracket, the face wall plate is disposed at a predetermined interval from the structure, and the plurality of face wall plates and the plurality of steel elements arranged It is characterized by being filled with a filler.

  The construction method of the structure at the intersection of the facilities of the present invention is not limited to traffic facilities such as existing roads and tracks, but also to new traffic facilities such as roads and tracks, or tunnels for sewers and rainwater drainage. In the construction for crossing these facilities, it can be suitably used for a structure in which a plurality of steel elements are arranged in the ground in a substantially orthogonal manner in the length direction by a non-open cutting method. And since the process of arrange | positioning filler layers, such as a face wall board and concrete, inside the inner surface of a structure is implemented by the combination of a simple operation | work, its practical value is very high.

In particular, if the tip of all excess screw rods is cut, the surface of the face wall plate, which is the inner wall surface of the structure to be constructed, will be flat, and water will flow into the interior like a sewer or rainwater drainage tunnel. It is suitable for a facility for flowing water, and the inner wall surface has a small resistance to water.
Further, when the face wall plate is made of polymer-impregnated concrete, resin concrete, or fiber reinforced concrete, it is extremely light and high in strength, so that the transfer work, the mounting work, and the entire construction are extremely easy.

  Furthermore, the structure constructed by the above construction method is a structure in which a filler layer such as a face wall plate and concrete is disposed inside the inner surface of the structure, and the steel element is protected against reinforcement and corrosion. It is a structure that is highly effective and highly durable.

First, the first to fifth steps constituting the construction method of the present invention will be described.
[First step]
The first step is combined so that the steel elements with a substantially rectangular cross section are drawn into the ground, and the adjacent steel elements are fitted to each other in the joint, approximately perpendicular to the length direction of the existing facility. This is a process for constructing a box-like or tunnel-like structure.
Existing facilities are transportation facilities such as train tracks and motorways. The above-mentioned structure is constructed in order to construct a new facility substantially orthogonal to the existing facility. The new facility is a transportation facility such as a train track (for example, a subway) or an automobile road. However, other facilities such as a sewer and a rainwater drainage channel may be used.
Moreover, this process is a method disclosed in Patent Documents 1 and 2 as described above, and by scraping the soil inside the structure in which a plurality of steel elements are combined, the side portions of the steel elements are removed. An inner space is formed while being exposed.

[Second step]
In the second step, a mounting rod is protruded from the side surface of the steel element constituting the inner surface of the structure, a high nut is fastened to the tip of the mounting rod, and all screw rods are attached to the fastened nut. It is the process of fixing.
The method of protruding the mounting rod from the side surface of the steel element is nothing but fixing the mounting bracket (stud) constituting the mounting rod to the side surface of the steel element, and the method and structure are particularly limited. However, for example, the mounting bracket may be integrally fixed at a predetermined position of the steel element in advance, but it is important that the steel element is not retracted. Usually, a method is adopted in which a mounting hole is previously provided at a predetermined position of the steel element, and the mounting bracket is fixed to the mounting hole by welding or the like after the steel element is drawn. Alternatively, an attachment hole may be provided after the steel element is retracted, or the attachment position may be specified, and the attachment bracket may be fixed to the attachment hole or the attachment position. A female screw groove may be provided on the inner peripheral edge of the mounting hole to mount the mounting bracket. For example, the mounting bracket may have a tapered head and is inserted from the inside of the steel element so that the head is fixed in a locking manner. A female screw groove (tapping) for connecting a high nut is provided at the tip of the mounting bracket (mounting rod).
Moreover, the operation | work which fastens a high nut to the front-end | tip of a mounting rod, and the operation | work which fixes all the screw rods to the fastened high nut can be implemented very easily, unless it explains in particular.

[Third step]
In the third step, a face wall plate in which a fixing metal fitting having an insertion hole is embedded in advance is disposed at a predetermined interval from the structure, and the tips of all the screw rods are inserted into the insertion holes of the face wall plate. This is a process of inserting and fixing the nuts.
The fixing bracket embedded in the face wall plate in advance is not particularly limited with respect to the configuration other than having an insertion hole through which the tip of all the screw rods can be inserted, and for example, a leg portion extending in the surface direction of the face wall plate. It may be formed, or a nut may be fixed to the edge of the insertion hole. Such a fixing metal fitting can be embedded in one piece by charging it into the mold when the face wall plate is formed or by embedding the cast concrete composition while it has fluidity. As the face wall plate itself, for example, a polymer-impregnated concrete (PIC) plate is preferably used. This PIC board is a thin concrete board reinforced with short fibers, impregnated with a polymer, and is filled with a polymer up to a minute gap. Therefore, it has high water tightness and high strength, and is excellent in freeze-thaw property, chemical resistance, wear resistance and the like. Resin concrete board also has the same performance as PIC board because it uses unsaturated polyester or epoxy resin. Further, a fiber reinforced concrete (FRC) plate reinforced with various short fibers, hard steel wires, glass fibers, carbon fibers, or the like may be used. The face wall plate is not limited to other shapes and material configurations, but when using a PIC plate, resin concrete plate, or FRC plate as described above, it is possible to reduce the thickness and weight, and it is particularly large. Even if it is arranged in a lower part where a large pressure acts, crushing hardly occurs, and the on-site delivery becomes extremely easy. Further, for example, a special mechanical device is not required, and it is possible to carry in and install by human power. Furthermore, the fact that no mechanical device or the like is required for carrying-in or installation work means that time constraints are reduced, and as a result, it contributes to shortening of the construction time.
In addition, the work of disposing the face wall plate at a predetermined interval from the structure, the work of inserting the tip of all the screw rods into the insertion hole of the face wall plate, and the work of fastening and fixing the nut are not particularly described. And can be implemented very easily.

[Fourth process]
A 4th process is a process of repeating those operation (2nd-3rd process), and arrange | positioning a some face wall board in one surface.
The inner surface of the structure is formed by a plurality of steel elements, but the inner wall surface of the structure is formed by disposing a plurality of face wall plates in the inner space.

[Fifth process]
The fifth step is a step of filling a filler between a plurality of disposed face wall plates and a structure made of a plurality of steel elements.
Various fillers such as mortar, concrete, or grout material can be used as the filler, and this filler is formed by the inner surface of the structure formed by a plurality of steel elements and a plurality of face wall plates. It fills between the inner wall surfaces of the structure to be made.

In any one of the third to fifth steps described above, it is desirable to cut the tips of all excess screw rods.
In other words, in the third step, if the nut is fastened, the operation of cutting the tip of all the excess screw rods is not particularly limited, for example, after filling the filler in the fifth step. Also good.

In the construction method of the present invention configured in each of the first to fifth steps, a filler layer such as a face wall plate and concrete is provided inside the inner surface of the structure formed by the steel elements. Each step can be implemented by a combination of simple operations.
Therefore, the construction method of the present invention is a construction method in which a traffic facility such as a new road or track, or another facility such as a sewer or rainwater drainage tunnel is crossed with a traffic facility such as an existing road or track. The non-cutting method can be suitably used for a structure in which a plurality of elements are arranged in the ground so as to be substantially orthogonal to the length direction.
Furthermore, the structure constructed by the above construction method is a highly durable structure that has a remarkably high protection effect against reinforcement and corrosion of steel elements.

Hereinafter, the present invention will be described in more detail based on embodiments of the drawings.
The illustrated embodiment shows an example of constructing a new drainage channel that traverses under the track of a train that is an existing facility.
As a first step, the steel element 1 having a substantially rectangular cross section is drawn into the ground and adjacent to the length direction (left and right direction in the drawing) of a train track (not shown) in a substantially orthogonal shape (front and back direction in the drawing). A box-shaped structure 1 ′ was constructed by combining the steel elements 1 and 1 so as to be fitted to each other in the joints. And by scraping out the soil inside structure 1 ', the side surface part of steel element 1 was exposed, and inner space was formed. Moreover, grout (not shown) was filled in the joint fitting portion that connects the steel elements 1 and 1. In addition, as the steel element 1, as described above, three types of steel elements having a rectangular cross section and a steel element having a substantially U-shaped cross section are used. .

  As a second step, as shown in FIG. 2, the mounting rod 2 is protruded from the side surface portion of the steel element 1 constituting the inner surface of the structure 1 ′, and the high nut 3 is fastened to the tip of the mounting rod 2. All screw rods 4 were fixed to the fastened high nut 3. Specifically, the mounting hole 11 was provided in a predetermined position of the steel element 1 in advance, and the mounting bracket 2 was fixed to the mounting hole 11 after the steel element 1 was retracted. A male screw groove was provided at the tip of the mounting bracket 2 (mounting rod).

As a third step, a face wall plate 6 in which a fixture 5 having an insertion hole 51 therein is embedded in advance is disposed at a predetermined interval from the structure 1 ′, and the tips of all the screw rods 4 are arranged. In this step, the nut 7 is fixed by being inserted through the insertion hole 51 of the face wall plate 6.
The fixing bracket 5 embedded in advance in the face wall plate 6 has an insertion hole 51 through which the tip of all the screw rods 4 can be inserted, and a leg portion 52 extending in the surface direction of the face wall plate 6 is formed. A nut 53 is fixed to the edge of 51. As the face wall plate 6 itself, a fiber reinforced concrete (FRC) plate reinforced with polypropylene (PP) short fibers (20 denier, 20 mm; mixing rate 0.8 vol%) was used. The concrete strength was 27 N / mm ² and the air volume was 4.5%.

  As a 4th process, the said 2nd-3rd process was repeated, the several face wall board 6 was arrange | positioned in one surface shape, and the inner wall surface of the structure was formed.

  As a fifth step, concrete was filled as a filler 8 between the plurality of face wall plates 6 and the structure 1 ′ composed of the plurality of steel elements 1. Further, the tip of the surplus all screw rod 4 was cut, and the grout 9 was filled so as to fill the tip of the all screw rod 4 and the nut 7.

The construction method of the present invention carried out in this way is a non-cutting method, and can be used for a structure in which a plurality of steel elements 1 are arranged in the ground substantially orthogonally to the length direction. The process of disposing the face wall plate 6 and the filler layer 8 such as concrete on the inner side of the side face is carried out by a combination of simple operations and has extremely high practical value.
Further, the inner wall surface of the constructed structure is substantially flat as shown in FIG. 3, and the inner wall surface has a small resistance to water, which is suitable as a facility for flowing water inside.
Further, the constructed structure is a structure in which the face wall plate 6 and the filler layer 8 are arranged inside the steel element 1, and the protection effect against the reinforcement and corrosion of the steel element 1 is extremely high and durable. It became a highly structural structure.

  Applicable to various transportations and facilities.

It is sectional drawing which shows a part of structure in the cross | intersection part of the facilities mutual of an Example. It is sectional drawing which expands and shows the A section of FIG. It is an arrow view in the B section of FIG.

Explanation of symbols

1 Steel element 1 'Structure 11 Mounting hole 2 Mounting rod (Mounting bracket)
3 High Nut 4 Fully Threaded Bar 5 Fixing Bracket 51 Insertion Hole 52 Leg 53 Nut 6 Face Wall Plate 7 Nut 8 Filler (Layer)
9 Grout

Claims (4)

  Combined so that steel elements with a substantially rectangular cross section are drawn into the ground, and adjacent steel elements are fitted together with joints, in a box or tunnel shape, approximately perpendicular to the length of the existing facility A first step of constructing the structure of the structure, and a mounting rod projecting from the side surface portion of the steel element constituting the inner surface of the structure, a high nut was fastened to the tip of the mounting rod, and fastened A second step of fixing the entire screw rod to the high nut, and a face wall plate in which a fixing metal fitting having an insertion hole is embedded in advance at a predetermined interval from the structure, and the entire screw rod A third step of inserting the tip of the plate into the insertion hole of the face wall plate and fastening and fixing the nut, and a fourth step of arranging a plurality of face wall plates in a single plane by repeating these operations Consists of multiple face wall plates and multiple steel elements Construction methods of the structure at the intersection of the facility each other which is characterized in that a fifth step of filling a filler between the structures.   The construction method for a structure at an intersection between facilities according to claim 1, wherein the tip ends of all excess screw rods are cut in any of the third to fifth steps.   The method for constructing a structure at an intersection of facilities according to claim 1 or 2, wherein the face wall plate is selected from polymer-impregnated concrete, resin concrete, and fiber reinforced concrete, and the filler is mortar or concrete.   A mounting rod is projected inside the box-shaped or tunnel-shaped structure constructed by arranging a plurality of substantially rectangular steel elements in a cross-section substantially perpendicular to the length direction of the existing facility, From the structure, fix the face wall plate that has all screw rods extended through the high nuts to the mounting rods, and has embedded the fixing metal fittings with the insertion holes in the interior in advance. Structures at intersections between facilities, in which face wall plates are arranged at regular intervals, and a filler is filled between the plurality of arranged face wall plates and a plurality of steel elements. .

Images