JP2000257006A - Artificial ground structure and its construction method - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an artificial ground structure that can simplify construction, shorten construction period, and suppress natural destruction as much as possible in an artificial ground structure for creating roads and parks on slopes. SOLUTION: After placing a foundation pile 4, a steel pipe member 9 and a steel beam member of a socket having a diameter greater than the foundation pile diameter and capable of absorbing a construction error of the foundation pile 4, and having a length greater than the foundation pile diameter. 5 is covered with the head member of the foundation pile 4 and the gap between the foundation pile 4 and the steel pipe 9 of the socket member 13 is filled with a filler such as concrete to form a beam between the foundation pile 4 and the beam. 5 is constructed, a floor slab 6 is fixed on a beam member, and an artificial ground is constructed on a slope or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial ground structure for constructing parks and station buildings in the field of civil engineering and construction on slopes of mountainous areas, and an artificial ground structure for elevated structures such as roads and railways, and a construction method. .

[0002]

2. Description of the Related Art Conventionally, when constructing artificial ground on a slope in a mountainous area or the like, there is a large construction error in a foundation pile cast on a slope. Reinforced concrete structures are often constructed by on-site construction in order to absorb construction errors in foundation piles at the joints with the sections.

However, in such reinforced concrete construction, it is difficult to transport construction materials and construction equipment, and at the time of construction, erection columns are erected between foundation piles or steel beams are installed between foundation piles. It is necessary to assemble a formwork for beams and floor slabs supported by columns and steel beams, and to assemble the rebar in this formwork, then cast concrete to build a reinforced concrete beam. Complicated, construction period is long, construction cost is high, construction conditions are poor, quality is difficult to secure, the weight of the upper structure is large, and high seismic performance is required for the foundation structure to secure the seismic design And was uneconomical.

In the construction of artificial ground on a slope, when the above-mentioned reinforced concrete structure is used, it is necessary to secure scaffolds and supports and secure a space for carrying a large amount of construction materials and construction equipment. In the case of constructing artificial ground by excavation, there is a problem that excavation of a slope causes great natural destruction in a mountainous area.

On the other hand, by using a lightweight steel beam member which can be manufactured in advance at a factory for the upper structure, the weight of the upper structure can be reduced, the specification of the foundation can be reduced, and the economic efficiency can be improved. In order to simplify the above, it has been difficult to construct the joints with the beam members manufactured in advance because the construction error of the foundation pile is large in the conventional bolt joining and welding joining. It is also possible to construct a beam member after measuring the dimensions after pile driving, but it takes a lot of time to construct and requires high precision control of construction precision and processing precision, and it is difficult to control construction.

A method for constructing a structure comprising a steel pipe pile and a steel girder and a measuring ruler used for the same have been proposed as an improvement of such an artificial ground (Japanese Patent Laid-Open No. 5-1409).
No. 56) discloses a method for quickly and reliably connecting a pile and a steel girder by using a steel pipe pile and a steel girder to absorb construction errors of the pile.

However, in this method, after the steel pipe pile is driven, the construction error of the steel pipe pile is measured, and a joining member composed of a steel girder and a connection member is manufactured so as to cancel the construction error of the steel pipe pile. It is necessary to weld to steel pipe piles, and it takes a lot of time to measure the construction error and manufacture the joint members.In addition, the connection between the joint members and the steel pipe piles requires on-site welding, which makes construction difficult and reduces construction costs. However, there is a problem that it is difficult to secure the quality in the field welding.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an improvement in terms of economy, construction period, elimination of labor for construction, high earthquake resistance, suppression of natural destruction, and high quality. In other words, in the construction of artificial ground or elevated structures using conventional reinforced concrete beams, complicated on-site work such as reinforcing bar assembly and formwork installation on slopes requires a lot of construction time and cost, and the weight of the upper structure is large. The installation of formwork and scaffolding for construction, the loading of high-weight and high-volume materials, and the securing of a storage place caused a great deal of natural destruction.

Such artificial ground is a heavy structure expected to exhibit its function for a long period of time, and is often used on mountain slopes where maintenance and management are extremely difficult. Therefore, when steel beams, floor slabs, or steel pipe piles are used for such artificial ground, inspection and maintenance are required in places where it is difficult to work on slopes, and maintenance costs are incurred. There was a problem.
According to the present invention, the joint member is installed at the pile head, and then the foundation pile and the beam are easily joined to greatly shorten the construction period.
It enables construction of artificial ground structures with low construction cost, high quality and no harm to nature. Further, by using a steel material having high durability, maintenance can be omitted as much as possible.

[0010]

According to a first aspect of the present invention, there is provided an artificial ground structure according to the first aspect of the present invention, wherein the lower structure is a foundation pile structure, and the upper structure is provided with beams or floor slabs. In the artificial ground structure for building railways, roads, parks and houses, having a diameter larger than the diameter of the foundation pile,
An upper structural member consisting of a socket member provided with a steel pipe having a length equal to or greater than the diameter of the pile and a vertical or horizontal steel beam member is provided so that the steel pipe of the socket member covers the pile head of the foundation pile. It is characterized in that the socket member is integrated with the foundation pile by filling concrete or mortar or the like into the gap between the steel pipe of the foundation pile and the socket member, and the joint between the foundation pile and the beam is constructed. According to a second aspect of the present invention, in the artificial ground structure according to the first aspect, a steel pipe pile is used as the foundation pile and is driven into a slope, and a construction error of the steel pipe pile occurs about 1/10 of its diameter. On the premise of this, a steel pipe having a diameter that is at least 20% larger than the diameter of the steel pipe pile is used as the socket member. According to a third aspect of the present invention, in the structure of the artificial ground according to the first or second aspect, any of the foundation pile, the socket member, the steel beam, and the floor slab is formed using a highly corrosion-resistant steel material. It is characterized by. Claim 4 of the present invention uses, as the corrosion-resistant steel material, a socket member, a steel beam or a slab, a weather-resistant steel material or a steel material whose surface is coated with metal, and a foundation pile is coated with polyethylene. It is characterized by being formed using a steel pipe coated in advance with anticorrosion and a steel pipe made of weather-resistant steel at a factory such as urethane coating and metal coating. According to a fifth aspect of the present invention, in the artificial ground structure according to any one of the first to fourth aspects, the socket member and the beam member are separately manufactured, and each socket member is installed on a pile head of a foundation pile. The upper structure is constructed by installing and connecting a beam member between the socket members.

[0011]

[Function] When a beam structure to be installed on the upper part is pre-fabricated after connecting the foundation pile and connected by the pile head, it is difficult to connect at the joint because the construction error of the foundation pile is large. It was necessary to absorb the construction error by using a reinforced concrete structure constructed on site after the foundation pile was put in place.
However, in the present invention, a smooth load transmission between a steel pipe having a diameter larger than that of the foundation pile and having a length equal to or greater than the diameter and a steel beam is possible so that construction errors of the foundation pile can be absorbed. An upper structural member consisting of a socket member having a flexible diaphragm and a steel beam member is installed such that the steel pipe of the socket member covers the pile head of the foundation pile, and concrete is placed in the gap between the steel pipe of the socket member and the foundation pile. The joint between the beam member and the foundation pile is constructed by filling with mortar or the like, and the load is transmitted. By using a steel pipe of the socket member having a diameter large enough to absorb the construction error of the pile steel pipe, the construction error of the foundation pile can be absorbed. By using the artificial ground structure of the present invention, even when a construction error occurs in a pile steel pipe, the pile can be constructed using a steel beam member manufactured in advance. In addition to being able to increase the efficiency, it is possible to significantly shorten the construction period, reduce construction costs and achieve high quality, and to construct an artificial ground structure without harming nature. In addition, by using a weather-resistant steel material or a steel pipe coated with anti-corrosion, it can be used without performing maintenance for a longer period than a normal maintenance period, and maintenance on steep slopes in mountainous areas can be greatly reduced.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An artificial ground structure such as an elevated structure according to the present invention has a joint portion between a steel pipe having a diameter larger than the diameter of a foundation pile and a beam so as to absorb a construction error of the foundation pile.
After installing the upper structure consisting of a socket member with a diaphragm etc. that can transmit appropriate load and a steel beam member so that the steel pipe covers the pile head of the foundation pile, the gap between the foundation pile and the steel pipe The joints are fixed by filling concrete, mortar, etc. into the joints, and a floor slab, etc. is installed on the upper part. As the weather-resistant steel material, a steel material containing Ni, Cr, Cu, etc. can be applied. As the rust preventive coating, coating with a plate of stainless steel, monel, titanium, or the like, or coating with plating or thermal spraying of zinc, aluminum, or the like is applied. can do.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1, 2 and 3, the artificial ground 1
Consists of one or more blocks 3 provided on the slope 2 and comprises a foundation pile 4, a steel beam 5, a floor slab 6, and the like. In each of Examples 1, 2 and 3 described later, the foundation pile 4
Is installed in the underground 7 on the slope 2 of the mountainous area, and shows the structure of one block 3 of the artificial ground 1 and a construction method thereof. However, in each embodiment, the arrangement of the blocks 3 of the artificial ground 1 and the arrangement of the foundation piles 4 and the steel beams 5 show examples of typical artificial ground, and the present invention is limited by this arrangement. Not something. Further, although each embodiment shows a case where a steel pipe pile is used as a foundation pile, the present invention is not limited to a steel pipe pile.

Embodiment 1 Embodiment 1 is shown in FIGS. 3 is a side view of one block 3 of the artificial ground 1 according to the first embodiment viewed from a direction perpendicular to the slope, FIG. 4 is a perspective view of a main part, and FIG. 5 is an exploded perspective view of a main part. 6 to 8 show the pile head 8 and the socket member 18, and FIGS. 9 and 10 show the artificial ground 1.
1 is a side sectional view of one block 3 viewed from a direction perpendicular to the slope and a direction of the slope. The foundation pile 4 made of the steel pipe pile of the first embodiment is a straight pile which is installed in two rows on the hill side and the valley side of the slope 2 so that the lower end is fixed to the underground 7 of the slope 2. Beam 5
Are arranged so as to connect the upper ends of adjacent piles with the pile head 8, and the floor slab 6 is installed above the steel beam 5.

To construct one block 3 of the artificial ground 1, after the foundation pile 4 has been driven, the pile head 8 is cut so that the position of the pile head 8 is at a predetermined height, and then the pile 3 is required to be overlapped with the socket steel pipe 9. A predetermined amount of the slip stopper 10 is installed on the outside of the pile steel pipe according to the above condition, and the concrete 11 is filled inside the foundation pile.

Next, after assembling the socket member 13 and the steel beam 5 comprising the diaphragm 12 for connecting the steel tube 9 of the socket and the steel beam 5 manufactured in the factory in advance, the steel tube 9 of the socket member 13 is assembled. , So as to cover the pile head 8 of the foundation pile 4. At this time, for the steel pipe 9 of the socket member 13, a steel pipe having a diameter sufficiently larger than the diameter of the foundation pile 4 and having a length equal to or larger than the diameter is used, and is a predetermined construction position.
The pile 4 is installed so as to absorb a construction error of the foundation pile 4 and to maintain a gap for covering the pile head 8 with a filler 14 such as concrete after covering the pile head 8.

After that, the steel pipe 9 of the socket member and the foundation pile 4
A filler 14 such as concrete is poured into the gap between the steel beams 5.
Is fixed. Cast-in-place concrete on steel beam 5,
A slab 6 made of precast concrete, a composite slab, a steel slab, or the like is installed, and a surface finishing material 15 such as surface concrete, asphalt, earth and sand, and the like, and an artificial ground structure is completed. In the illustrated example, the surface finishing material 15
A ground cover 19 and a balustrade 20 are provided on the sides of the.
Further, on the inner and outer surfaces of the foundation pile 4 and the inner surface of the steel pipe 9, an appropriate amount of a slip stopper 10 is attached or a steel pipe with a projection is used as necessary.

[Embodiment 2] Embodiment 2 is shown in FIGS. 11 and 12 show a perspective view of a main part and an exploded perspective view of a main part. 13 to 15 show the pile head 8 and the socket member 13, and FIGS. 16 and 17 are side sectional views and the slope side of one block 3 of the artificial ground 1 according to the second embodiment viewed from a direction perpendicular to the slope. FIG. The artificial ground construction method of the second embodiment is substantially the same as that of the first embodiment, except that the socket member 13 and the steel beam 5 are separately constructed. The foundation pile 4 made of the steel pipe pile of the embodiment 2 is composed of a foundation pile installed in two rows on the hill side and the valley side of the slope 2 so that the lower end is fixed to the underground 7 of the slope 2. Beam 5 is pile head 8
It is arranged to connect the upper ends of adjacent piles with
A floor slab 6 is installed above the steel beam 5.

In the second embodiment, as in the first embodiment, the construction of one block 3 of the artificial ground 1 is performed after the foundation pile 4 is driven and then cut so that the position of the pile head 8 is at a predetermined height. Then, a predetermined amount of a slip stopper 10 is installed outside the pile steel pipe as necessary at the overlapping portion of the socket with the steel pipe 9, and concrete 11 is filled inside the foundation pile 4.

Next, a socket member 13 consisting of a steel pipe 9 and a diaphragm 12 of a socket for transmitting a load between the foundation pile 4 and the beam portion and a beam connecting member 17 connected to the steel beam 5 by bolts 16 are previously prepared. Manufactured in a factory, the steel pipe 9 of the socket member 13 is installed on the entire pile head 8 so as to cover the pile head 8 of the foundation pile 5. At this time, a steel pipe having a sufficiently large diameter is used for the steel pipe 9 of the socket member 13, the steel pipe 9 is located at a predetermined construction position, and the pile head 9 is covered so that construction errors of the foundation pile 4 can be absorbed. After that, it is installed so that a gap that can be filled with the filler 14 such as concrete can be maintained.

Thereafter, a filler 14 such as concrete is poured into the gap between the steel pipe 9 of the socket member 13 and the foundation pile 4 to fix the socket member 13.

After fixing the socket member 13 to the pile head 8, the steel beam 5 is connected to the beam connecting member 17 by bolts (or welding) 16, and then cast-in-place concrete or precast on the steel beam 5. A floor slab 6 made of concrete, a composite slab, a steel slab, or the like is installed, and a surface finishing material 15 such as surface concrete, asphalt, earth and sand, and the like, and an artificial ground structure is completed. Further, on the inner and outer surfaces of the foundation pile 4 and the inner surface of the steel pipe 9, an appropriate amount of a slip stopper 10 is attached or a steel pipe with a projection is used as necessary.

Third Embodiment FIGS. 18 to 20 show a third embodiment. FIG. 18 is a side sectional view of the artificial ground, and FIG. 19 is a perspective view of a joint between the socket member 13 and the brace material 18.
FIG. 20 shows a perspective view of a mounting portion between the steel pipe pile and the brace material 18. The artificial ground structure of the third embodiment is almost the same as that of the second embodiment, except that the socket member 13 and the beam member 5 are installed.
The outer steel pipe 23 having the reinforcing ring 24 and the gusset plate 21 is attached to the steel pipe pile 4 via the filler 14, and the socket member 13 and the outer steel pipe 23 are connected with the brace material 18 via the upper and lower gusset plates 21. By
This is an example of increasing the strength and seismic resistance of the entire structure such as deformation and shaking of the artificial ground.

[0024]

According to the present invention, in an artificial ground structure for forming a road or a park on a slope, a socket member made of a steel pipe or the like and a filler such as concrete or mortar are interposed at a joint between a foundation pile and a steel beam. By using the new joining method, it is possible to absorb the construction error of the foundation pile at the site and join it, so it is possible to use a lightweight steel member manufactured in advance for the superstructure, and to improve the seismic resistance and the economic efficiency of the foundation pile In addition, simplification of construction, shortening of construction period, and natural destruction can be suppressed as much as possible by omitting scaffolding and support works.

[Brief description of the drawings]

FIG. 1 is a plan view of an artificial ground showing an embodiment of the present invention.

FIG. 2 is a side view of the artificial ground showing the embodiment of the present invention.

FIG. 3 is a side view of the artificial ground showing the embodiment of the present invention.

FIG. 4 is a partially broken perspective view of a part of the artificial ground showing the first embodiment of the present invention.

FIG. 5 is an exploded perspective view of the artificial ground showing the first embodiment of the present invention.

FIG. 6 is a perspective view of a pile head joint between a foundation pile and a steel beam member according to the first embodiment of the present invention.

FIG. 7 is a side sectional view of the socket member showing the first embodiment of the present invention.

8 (A), (B), and (C) show AA, B- in FIG.
The figure which follows the B, CC line.

FIG. 9 is a side sectional view of one block of the artificial ground according to the first embodiment of the present invention, viewed from a direction perpendicular to a slope.

FIG. 10 is a side sectional view of one block of the artificial ground according to the first embodiment of the present invention, as viewed from a slope direction.

FIG. 11 is a partially cutaway perspective view of a principal portion of an artificial ground according to a second embodiment of the present invention.

FIG. 12 is an exploded perspective view of a main part of an artificial ground according to a second embodiment of the present invention.

FIG. 13 is a perspective view of a pile head joint between a foundation pile and a steel beam member according to a second embodiment of the present invention.

FIG. 14 is a side sectional view of a socket member showing the second embodiment of the present invention.

15 (A), (B) and (C) are DD, FIG.
The figure which follows the EE and FF line.

FIG. 16 is a side sectional view of one block of the artificial ground according to the second embodiment of the present invention as viewed from a direction perpendicular to a slope.

FIG. 17 is a side sectional view of one block of the artificial ground according to the second embodiment of the present invention as viewed from a slope direction.

FIG. 18 is a side cross-sectional view of one block of an artificial ground according to a third embodiment of the present invention viewed from a direction perpendicular to a slope.

FIG. 19 is a perspective view of a joint between a brace member and a socket member, showing Embodiment 3 of the present invention.

FIG. 20 is a perspective view of a joint between a brace material and a steel pipe pile, showing a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Artificial ground structure 2 ... Slope 3 ... 1 block of artificial ground structure 4 ... Foundation pile 5 ... Steel beam 5a ... Beam flange 5b ... Beam web 6 ... Floor slab 7 ... Underground 8 ... Pile head 9 ... Socket Steel pipe 10 ... Preventing displacement 11 ... Filled concrete 12 ... Diaphragm 13 ... Socket member 14 ... Filling material 15 ... Surface finishing material 16 ... Bolt or welded joint 17 ... Beam connecting member 18 ... Brace 19 ... Gusset plate 22 ... Pin 23 ... Outer steel pipe 24 ... Reinforcing ring

Claims (5)

[Claims] 1. An artificial ground structure for constructing railways, roads, parks and houses by providing a lower structure as a foundation pile structure and providing beams and floor slabs in the upper structure to have a diameter larger than the diameter of the foundation pile. Then, a socket member having a steel pipe having a length equal to or larger than the diameter of the pile, and an upper structural member including a vertical or horizontal steel beam member, and the steel pipe of the socket member forms a pile head of a foundation pile. It is installed so as to cover, and the socket member and the foundation pile are integrated by filling concrete or mortar etc. into the gap between the steel pipe of the foundation pile and the socket member, and the joint between the foundation pile and the beam is constructed. Artificial ground structure. 2. The artificial ground structure according to claim 1, wherein a steel pipe pile is used as the foundation pile and is cast on a slope, and a construction error of the steel pipe pile occurs about 1/10 of its diameter. An artificial ground structure characterized by using a steel pipe having a diameter larger than a diameter of a steel pipe pile by 20% or more as a socket member. 3. The artificial ground structure according to claim 1, wherein the foundation pile, the socket member, the steel beam, and the floor slab are formed using a highly corrosion-resistant steel material. And the artificial ground structure. 4. As the steel material having high corrosion resistance, a weather-resistant steel material or a steel material whose surface is metal-coated is used for a socket member, a steel beam and a floor slab, and a polyethylene coating, a urethane coating is used for a foundation pile, The artificial ground structure according to claim 3, wherein the artificial ground structure is formed using a steel pipe that has been subjected to anticorrosion coating in a factory such as a metal coating and a steel pipe made of a weather-resistant steel material. 5. The artificial ground structure according to claim 1, wherein said socket member and said beam member are manufactured separately, and said socket member is installed on a pile head of a foundation pile. A method of constructing an artificial ground in which an upper structure is constructed by installing and connecting beam members between the members.