JP2004190266A - Construction method of grade separated crossing road and connection method of foundation structure of viaduct and pier used for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To construct a grade separated crossing road in an extremely short period of time and solve the construction site securing problem. <P>SOLUTION: A foundation structure for supporting piers is constructed between the installation sections of a viaduct. Two bridge girders are assembled on the ground at a site adjacent to both ends of the installation sections in parallel with the above works and the piers are assembled with the piers and further, the soil between filling sections connecting to both ends of the installation sections is improved. Subsequently, the two bridge girders together with the piers are transferred to the installation sites by a transportation truck. The bridge girders are arranged above the foundation structure previously constructed and then, the bridge girders are lowered to a specified level together with the piers. In this condition, the piers are temporarily fixed to the foundation structure. Next, a bank is constructed between the filling sections and foundation concrete to fix the piers to the foundation structure is placed and cured. Next, the mutually opposite ends of the two bridge girders are connected together to form the whole bridge girder. Finally, pavement is spread on the bridge face on the bridge girder and the filling to form a viaduct and a slope of filling. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method of constructing a three-dimensional intersection having a viaduct and an embankment slope, and a method of joining a bridge pier with a foundation structure of the viaduct that can be used in the method.
[0002]
[Prior art]
In recent years, traffic congestion in cities has been intensifying, and as one measure for resolving this, it is necessary to improve and maintain intersections from flat to overpasses.
[0003]
By the way, in the conventional method of constructing an overpass at the time of the above-mentioned improvement work, first, in general, a plurality of footing-structured basic structures in which a steel anchor frame is surrounded by concrete are formed along an elevated bridge erection section. The bridge piers are erected on the foundations of the bridge, and then the bridge girders are sequentially bridged on those piers to assemble the entire bridge girder. Then, the bridge surface and the embankment on the bridge girder are paved to form a viaduct and an embankment slope (for example, see Non-Patent Documents 1 and 2).
[0004]
[Non-patent document 1]
Civil engineering construction management checkpoint "Foundation II", Sankaido Co., Ltd., first edition issued on August 25, 2000 [Non-Patent Document 2]
Civil Engineering Handbook, edited by the Japan Society of Civil Engineers, Gihodo Publishing Co., Ltd., published the fourth edition on November 18, 1989.
[Problems to be solved by the invention]
However, in the above-mentioned conventional construction method, since the bridge girder is erected after the concrete work such as the construction of the foundation structure of the time-consuming footing structure is performed, the construction period is inevitably extended for one to two years. In the meantime, it is necessary to place a large crane on the road parallel to the viaduct erection section to carry out erection work for bridge girder, etc., which requires traffic regulation and widespread traffic closure, thus creating new traffic congestion. Therefore, there is a problem that it is difficult to obtain the understanding of the surrounding residents, etc. in combination with the problem of noise during construction. Furthermore, in urban areas, there is a problem that it is difficult to secure construction sites for pre-assembly of piers and bridge girders.
[0006]
[Means for Solving the Problems and Their Functions and Effects]
SUMMARY OF THE INVENTION An object of the present invention is to provide a method of constructing a three-dimensional intersection that advantageously solves the above-mentioned problems, and a method of joining a viaduct foundation and a pier that can be used in the method. The construction method of the intersection, when constructing a three-dimensional intersection with a viaduct and an embankment slope, in the erection section of the viaduct, construct a foundation structure to support a pier, in parallel with this, At a location adjacent to both ends of the erection section in both directions of the road extending direction, two bridge girders obtained by dividing the entire bridge girder into two in the road extending direction are respectively ground-assembled, and piers are attached to those bridge girders. The ground improvement of the embankment section connected to both ends of the bridge, and then move the two bridge girders together with the piers to the erection site with a transport trolley, and place the piers above the foundation structure previously constructed. Lowering the bridge girder to a predetermined height together with the pier, temporarily fixing the pier to the foundation structure in that state, and then applying embankment to the embankment section and fixing the pier to the foundation structure. After curing, the opposite ends of the two bridge girders are connected to each other to form the entire bridge girder, and finally, the bridge surface on the bridge girder and the embankment are paved to form the bridge girder. It is characterized by forming a viaduct and the embankment ramp.
[0007]
According to the construction method of the present invention, the foundation structure for supporting the bridge pier in the erection section of the viaduct, and the two bridge girders are grounded at locations adjacent to both ends of the erection section in both directions of the road extending direction. The construction period is shortened by assembling the superstructure to attach the piers to those bridge girders and the ground improvement of the embankment section connected to both ends of the erection section in parallel, shortening the construction period. Together with the pier, place the pier above the previously constructed foundation structure, lower the bridge girder together with the pier to a predetermined height, temporarily fix the pier to the foundation structure, and then fill the embankment section Construction work and the placement and curing of the foundation concrete to fix the piers to the foundation structure are performed in parallel, shortening the construction period. Te resulting performed in a short period, it is possible to obtain an understanding of such residents around relatively easily.
[0008]
Moreover, according to the construction method of the present invention, two bridge girders obtained by dividing the entire bridge girder into two in the road extending direction are respectively assembled at the locations adjacent to both ends of the erection section in both directions of the road extending direction, and the respective parts are assembled on the ground. Assembling the piers to the bridge girders, and then moving the two bridge girders together with the piers to the erection site by transport trolleys sequentially or simultaneously, so that traffic control can be minimized by occupying only the land inside the road. In addition, new traffic congestion can be alleviated, and the problem of securing a construction site can be solved.
[0009]
Note that, in the method of constructing an overpass of the present invention, the foundation structure may be constructed by a well construction method, and if the foundation structure is constructed by a construction method, a cylindrical block is pressed into the ground. Since the foundation structure can be formed with extremely low noise, and a large-scale concrete construction such as a time-consuming footing construction is not performed, the construction period of the foundation structure and, consequently, the entire overpass can be shortened.
[0010]
In addition, the method for joining the viaduct foundation structure and the pier of the present invention which can be used in the above construction method is a method for joining the viaduct foundation structure and the pier by the well tube method of press-fitting a cylindrical block into the ground. While constructing the structure, planting a plurality of steel rods in the foundation structure, then inserting the steel pier into the central hole of the foundation structure, temporarily placing the pier, and then A plurality of steel rods respectively inserted into the flange portions provided on the pier are joined to a plurality of steel rods planted in the foundation structure, or the plurality of steel rods planted in the foundation structure are connected to the pier. The flanges provided in each are inserted, and the height and inclination of the pier are corrected while applying axial force to the inserted steel rods with a jack, and then the axial force of the inserted steel rods is maintained. Let the pier stand alone, then It is characterized in that curing by Da設 mortar or concrete between the pier and the substructure.
[0011]
According to such a joining method, since large-scale concrete work such as time-consuming footing construction is not performed, the construction period of the foundation structure and, eventually, the viaduct can be shortened, and the bridge pier of the viaduct can be accurately and shortly attached to the foundation structure. Can be joined in time.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail by way of examples with reference to the drawings. 1 (a) to 1 (d) are explanatory views showing a schematic procedure of an embodiment of a method of constructing a grade separation road according to the present invention. FIG. 1 (a) is a plan view, and FIG. 4) to 4 (d) are side views. FIGS. 2A and 2B are a plan view and a side view, respectively, showing a three-dimensional intersection constructed by the construction method of the above embodiment.
[0013]
As shown in FIG. 2, the method of constructing a three-dimensional intersection according to this embodiment is a two-lane central lane sandwiching a center line of a road CW1 extending in the left-right direction among two roads CW1 and CW2 intersecting each other. In order to construct a three-dimensional intersection OW having a viaduct EB and an embankment slope FR, first, as shown in FIGS. 1 (a) and 1 (b), a central two-lane In the erection section BZ, six PC wells WP1 to WP6 as a foundation structure (substructure) for supporting the piers P1 to P4 and the bridge girder fulcrums A1 and A2 are constructed. The central two lanes plus one lane on either side of the location adjacent to both ends in the road extending direction (left-right direction in the figure) are defined as the night restricted range NZ, and the entire bridge girder HBB in the night restricted range NZ in the road extending direction. Divided into two The two bridge girders BB are respectively assembled on the ground, and two piers P1, P2 and P3, P4 as shown in FIG. 1 (c) are attached to the lower surface of the two bridge girders BB, respectively, to form an upper structure (superstructure). Assemble halfway, and at the same time, improve the ground of the embankment section RZ connected to both ends of the erection section BZ.
[0014]
Here, when the PC wells WP1 to WP6 are constructed, the PC well method is used as shown in FIGS. 3 and 4A and 4B. That is, as shown in FIG. 3, for example, the PC well press-fitting device WI, the power generator, the grout mixer, the grout pump, the hydraulic pump unit, and the slash tank are installed at six locations in the erection section BZ, respectively. , A dump truck DT and a crawler crane CC, and a digging facility and a temporary storage area for a PC well are set. As shown in FIG. 4, a hydraulically operated PC well press-fitting device WI serves as a cylindrical block. For example, unit PC wells having a diameter of 3 m are successively added, and at the same time, tension is applied to the internal PC steel rods and pressed into the ground to a depth of, for example, about 20 m to 40 m, and the soil in the central hole of the PC well is crawled. It is dug out by a hammer grab HG that is raised and lowered by a crane CC and carried out by a dump truck DT. Then, concrete is poured into the bottom of the central hole of each PC well thus formed to form a bottom plate.
[0015]
Here, when assembling the two bridge girders BB, respectively, and assembling the piers P1, P2 and P3, P4 two by two on the lower surface of the two bridge girders BB, for example, as a representative, the bridge girder BB on the left side of FIG. As shown in FIGS. 5 to 7, the truck crane and the vent method are used. That is, first, as shown in FIGS. 5A to 5C, a large hydraulic crane HC is used to move the trailer TR from the trailer TR onto vents B1 to B3 erected on the ground in a place adjacent to the embankment section RZ in the erection section BZ. The suspended steel bridge girder material BM is placed thereon, and the steel bridge girder materials BM are assembled together. Then, as shown in FIG. 6A, the steel bridge girder material BM is similarly extended up to the vent B4 erected on the ground. As shown in FIG. 6 (b), the steel pier P1 is assembled on the lower surface of the steel bridge girder BM at the position of the vent B4, and further, as shown in FIG. In the same manner as above, the steel bridge girder material BM is assembled on the upright vents B5 to B7. As shown in FIG. 7B, the steel bridge pier P2 is attached to the lower surface of the steel bridge girder material BM at the position of the vent B6. By assembling, adjacent to the embankment section RZ Slide into the earth assembled the bridge girder BB toward the intersection side bridged on the vent from the department side. Also, the bridge girder BB on the right side in FIG. 1 is erected on the vent and assembled on the ground. After the bridge girder BB is assembled on the ground, the bridge girder is installed up to the ground cover (road shoulder) and the railing (guard wall).
[0016]
When the six PC wells WP1 to WP6 as the substructure described above have been completed, a dolly (crawler type trailer) DR as a transport vehicle equipped with a height adjustment jack (deck lift) and a vent is then connected to the bridge girder BB. 1C, as shown in FIG. 1 (c), the two bridge girders BB are respectively lifted by the dolly DR together with the piers P1 to P4 and moved to the erection place, and the substructure as the previously constructed substructure is constructed. The piers P1 to P4 are arranged above the four PC wells WP2, WP3, WP4, and WP5 near the intersection among the six PC wells WP1 to WP6, and the bridge girder BB is fixed together with the piers P1 to P4. Lower to height.
[0017]
In this embodiment, this movement is performed on one side of each of the two bridge girders BB. For example, when the left bridge girder BB is moved in FIG. 1, first, as shown in FIG. The dolly DR is moved under the bridge girder BB, and then the height adjusting jack (deck lift) is operated to lift the bridge girder BB together with the two piers P1 and P2. Then, as shown in FIG. After moving or removing the vents along the travel path of the dolly DR in the sideways direction of the road and covering the upper ends of the PC wells WP1 to WP3 with steel plates, all the dolly DR are simultaneously driven toward the intersection to run the bridge girder BB. It is moved to the erection site together with the piers P1 and P2, and then the steel plate covering the PC wells WP1 to WP3 is removed and a fulcrum A1 is set on the PC well WP1. After that, as shown in FIGS. 9A and 9B, the deck lift is lowered to lower the bridge girder BB by, for example, about 2 m as a whole, and as shown in FIG. 9A, the lower ends of the piers P1 and P2. The parts are respectively inserted into the central holes of the PC wells WP2, WP3, and temporarily fixed to the PC wells WP2, WP3 by a method described later. Similarly, the bridge girder BB on the right side of FIG. 1 is similarly moved to the erection place and lowered, and the lower ends of the piers P3 and P4 are inserted into the center holes of the PC wells WP4 and WP5, respectively. Temporarily fix to WP5. FIG. 9C shows an abutment at the end of the embankment ramp FR formed in a step described later.
[0018]
After the temporary fixing, embankment and abutment are constructed in the embankment section RZ, and foundation concrete for fixing the four piers P1 to P4 to the four PC wells WP2 to WP5 is cast and cured. FIGS. 10A and 10B show an embodiment of the joining method of the present invention for joining the lower end of the pier inserted into the central hole of the PC well to the PC well by the above-mentioned temporary fixing and subsequent fixing. In the joining method of this embodiment, as shown in FIG. 10 (a), grout is inserted into the PC wells WP2 to WP5 before the piers P1 to P4 are inserted into the central holes of the PC wells WP2 to WP5. A coupler (female screw member) CR is screwed into each of upper ends of the plurality of steel rods SR planted near the ground surface, and then steel is inserted into the central holes of the PC wells WP2 to WP5. And the lower ends of the piers P1 to P4 are temporarily placed on a temporary support surface FS made of concrete in the central hole thereof via a height adjusting liner (steel plate) HL.
[0019]
Next, a plurality of steel rods SR different from those previously inserted through the flange portions FL provided around the piers P1 to P4, respectively, are screwed into the couplers CR in order to couple the steel rods SR to the previous steel rods. The nuts NT are screwed onto the latter steel rods SR, and the heights of the piers P1 to P4 are increased while giving an axial force to the steel rods SR with jacks JK, as shown by the broken lines in FIG. After correcting the inclination, the bridge piers P1 to P4 become independent by inserting a spacer SP of an appropriate length between the nut NT and the flange portion FL to maintain the axial force of the steel rods SR. The piers P1 to P4 are temporarily fixed to the PC wells WP2 to WP5.
[0020]
Next, as shown in FIG. 10B, the filling mortar MT is cast between the inner wall surfaces and the temporary supporting surfaces FS of the PC wells WP2 to WP5 and the piers P1 to P4 to cure, and the filling concrete is filled. The lower ends of the piers P1 to P4 are firmly fixed to the PC wells WP2 to WP5 by placing and curing the CT inside the piers P1 to P4.
[0021]
After the two bridge girders BB are positioned and fixed as described above, as shown in FIGS. 1D and 8C, the opposing ends of the two bridge girders BB are adjusted and then connected to each other. Then, the entire bridge girder HBB is formed, and finally, the bridge surface on the bridge girder HBB and the embankment constructed on the embankment section RZ are paved to form the viaduct EB and the embankment ramp FR.
[0022]
According to the method of constructing an overpass in the above embodiment, the PC wells P2 to P5 for supporting the piers P1 to P4 in the erection section BZ of the viaduct EB, and the road extending to both ends of the erection section BZ. At the same time, the two bridge girders BB are ground-assembled at locations adjacent in both directions, and the upper structure for assembling the piers P1 to P4 to the bridge girders BB and the ground improvement of the embankment section RZ connected to both ends of the erection section BZ are performed in parallel. To shorten the construction period, and furthermore, move the two bridge girders BB together with the piers P1 to P4 to the erection section BZ, and place the piers P1 to P4 above the PC wells P2 to P5 previously constructed. After the arrangement, the bridge girder BB is lowered to a predetermined height together with the piers P1 to P4, and the pier BB is temporarily fixed to the PC wells P2 to P5. ＰP4 is fixed to the PC wells P2 to P5 in parallel with the placement and curing of the foundation concrete, so that the construction period is shortened. It is possible to relatively easily obtain the understanding of the surrounding residents and the like.
[0023]
Moreover, according to the construction method of the above embodiment, two bridge girders BB obtained by dividing the entire bridge girder HBB into two in the road extending direction are respectively assembled at locations adjacent to both ends of the erection section BZ in both directions of the road extending direction. At the same time, the piers P1 to P4 are assembled to the bridge girders BB, and then the two bridge girders BB are moved together with the piers P1 to P4 to the erection site by the dolly DR, respectively, sequentially or simultaneously. Occupancy can minimize traffic restrictions, reduce new traffic congestion, and solve the problem of securing construction sites.
[0024]
Further, according to the method of constructing a three-dimensional intersection in the above embodiment, since the foundation structure is constructed by the PC well method, the cylindrical PC wells WP1 to WP6 are pressed into the ground, so that the foundation structure can be formed with relatively low noise. Since large-scale concrete work such as a footing construction that takes time can be formed without performing a large-scale concrete work, the work period of the basic structure and, consequently, the entire grade-crossing can be shortened.
[0025]
According to the method of joining the viaduct foundation structure and the pier of the above-described embodiment, the foundation structure is formed by the PC wells WP1 to WP6 without performing large-scale concrete work such as time-consuming footing construction. Since the construction period of the viaduct EB can be shortened and the steel bridge is temporarily fixed, the bridge piers P1 to P4 of the viaduct EB can be accurately and quickly joined to the PC wells P2 to P5 as the foundation structure. .
[0026]
As described above, the present invention has been described based on the illustrated example. However, the present invention is not limited to the above example. For example, in the above-described embodiment, two bridge girders BB are sequentially moved to the erection place. Alternatively, the two bridge girders BB may be moved to the erection place at the same time, or the whole may be moved from one direction if the circumstances of the dolly allow. Further, the two bridge girders BB in the method of constructing an overpass according to the present invention may not be divided into two parts at the center of the entire bridge girder HBB, but may be divided into unequal or three or more divided parts. Further, the foundation structure in the method of constructing a grade separation according to the present invention may not be a PC well, and in that case, the pier does not have to be inserted into the hole of the foundation structure.
[0027]
On the other hand, in the method of joining the viaduct foundation structure and the bridge pier according to the present invention, the coupler may be screwed into a PC steel rod planted in the PC well. May be constructed.
[Brief description of the drawings]
1 (a) to 1 (d) are explanatory views showing a schematic procedure of an embodiment of a method for constructing an overpass according to the present invention.
FIGS. 2 (a) and 2 (b) are a plan view and a side view showing a three-dimensional intersection constructed by the construction method of the embodiment.
FIG. 3 is a plan view illustrating facilities of a well pipe method performed by the construction method of the embodiment.
FIGS. 4 (a) and (b) are a plan view and a side view showing an implementation state of the well pipe method.
FIGS. 5A, 5B, and 5C are side views showing the first stage of ground assembly of a bridge girder performed by the construction method of the above embodiment, and a sectional view taken along line AA of FIG. It is BB sectional drawing.
FIGS. 6 (a) and 6 (b) are a side view showing a next stage of the ground assembling of the bridge girder performed by the construction method of the embodiment, and a cross-sectional view taken along the line CC of FIG. 6 (a).
FIGS. 7 (a) and 7 (b) are a side view showing the final stage of assembling the bridge girder by the construction method of the above embodiment, and a cross-sectional view taken along line DD of FIG. 7 (a).
8A, 8B, and 8C are side views showing an initial state of movement of a bridge girder performed by the construction method of the above embodiment, and plan views showing a state after movement of the bridge girder; It is a side view which shows the state after the descent of the subsequent bridge girder.
FIGS. 9A, 9B, and 9C are side views showing a state after the bridge girder is lowered after the bridge girder is moved by the construction method of the above embodiment, and a cross-sectional view near the pier; It is sectional drawing near the edge part of a bridge girder.
FIGS. 10 (a) and (b) are explanatory views showing one embodiment of a method for joining a viaduct foundation structure and a bridge pier according to the present invention, which is performed by the construction method of the above embodiment.
[Explanation of symbols]
A1, A2 Support points B1 to B7 Vent BB Bridge girder BM Bridge girder material BZ Construction section CC Crawler crane CR Coupler CT Filled concrete CW1, CW2 Road DR Dolly DT Dump truck EB Viaduct FL Flange FR Embankment ramp FS Temporary support surface HBB Bridge girder HC Hydraulic crane HG Hammer grab HL Liner JK Jack MT Filling mortar NT Nut NZ Night regulation section OW Overpass P1-P4 Pier RZ Embankment section SP Spacer SR Steel rod TR Trailer WI PC well press-in device WP1-WP6 PC well

Claims (3)

When constructing a three-dimensional intersection with a viaduct and embankment ramp,
In the erection section of the viaduct, construct a foundation structure to support the pier,
In parallel with this, two bridge girders obtained by dividing the entire bridge girder into two in the road extending direction are assembled at the places adjacent to both ends of the erection section in both directions of the road extending direction, and piers are attached to the bridge girders. Assembling, along with the ground improvement of the embankment section connected to both ends of the erection section,
Next, each of the two bridge girders is moved to the erection place with a transport trolley together with the pier, and the pier is arranged above the previously constructed foundation structure, and then the bridge girder is lowered to a predetermined height together with the pier. In that state, the pier is temporarily fixed to the foundation structure,
Next, while embankment is being constructed in the embankment section, curing is performed by placing foundation concrete for fixing the pier to the foundation structure,
Then, the opposite ends of the two bridge girders are connected to each other to form the entire bridge girder,
Finally, a pavement is applied to the bridge surface on the bridge girder and the embankment to form the viaduct and the embankment slope, and a method of constructing a three-dimensional intersection is provided. The method according to claim 1, wherein the foundation structure is constructed by a well pipe method. When joining the viaduct foundation and the pier,
Along with constructing the above-mentioned foundation structure by means of a well cylinder method of pressing a cylindrical block into the ground, planting a plurality of steel rods in the foundation structure,
Next, the steel pier is inserted into the central hole of the foundation structure, and the pier is temporarily placed,
Next, a plurality of steel rods respectively inserted into the flange portions provided on the pier are connected to upper ends of the plurality of steel rods planted in the foundation structure located near the ground surface, or are planted in the foundation structure. A plurality of steel rods were inserted through the flange portions provided on the piers, and the height and inclination of the piers were corrected while applying axial force to the inserted steel rods with jacks, and then they were inserted. Self-supporting the pier by maintaining the axial force of the steel bar,
Then, a mortar or concrete is poured between the foundation and the pier to cure the foundation, and the vial is joined to the pier.

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