JP4355240B2 - PC box girder extrusion construction method - Google Patents

PC box girder extrusion construction method Download PDF

Info

Publication number
JP4355240B2
JP4355240B2 JP2004077557A JP2004077557A JP4355240B2 JP 4355240 B2 JP4355240 B2 JP 4355240B2 JP 2004077557 A JP2004077557 A JP 2004077557A JP 2004077557 A JP2004077557 A JP 2004077557A JP 4355240 B2 JP4355240 B2 JP 4355240B2
Authority
JP
Japan
Prior art keywords
steel
box girder
construction
space
girder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2004077557A
Other languages
Japanese (ja)
Other versions
JP2005264533A (en
Inventor
政一 堀口
敦之 塚本
典雅 東田
康夫 猪熊
宏司 白谷
英彦 稲原
Original Assignee
中日本高速道路株式会社
大成建設株式会社
東日本高速道路株式会社
西日本高速道路株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中日本高速道路株式会社, 大成建設株式会社, 東日本高速道路株式会社, 西日本高速道路株式会社 filed Critical 中日本高速道路株式会社
Priority to JP2004077557A priority Critical patent/JP4355240B2/en
Publication of JP2005264533A publication Critical patent/JP2005264533A/en
Application granted granted Critical
Publication of JP4355240B2 publication Critical patent/JP4355240B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Description

  The present invention relates to an extrusion construction method for a PC box girder bridge.

  The extrusion erection method is a method of constructing a bridge by propelling precast members such as PC box girders sequentially from the rear of the abutment to form a bridge, and has advantages such as shortening the construction period and reducing the erection cost. is doing. Therefore, many developments, such as a PC box girder and its construction method, have been made so that the extrusion erection method can be performed more rationally. For example, Patent Document 1 describes an extrusion construction method for a composite PC bridge using a pre-tensioned precast prestressed concrete girder provided with a concrete flange and a corrugated steel web. Further, Patent Document 2 uses a so-called external cable system in which PC steel is placed outside the cross section of the PC box girder and tension is applied at the time of extrusion construction so that the PC steel material is not left in the cross section of the PC box girder. It describes the construction method of PC box girder.

  As described above, when the PC box girder bridge is extruded and installed, the PC steel material arranged in the bridge axis direction includes an inner steel material (cable or steel bar) embedded in the concrete member and an outer member arranged outside the member. There is a cable.

  The PC steel material during extrusion laying is generally arranged so as to cancel the tensile stress generated in the concrete member, so that the compressive stress of the upper and lower edges of the girder cross section due to pre-stress is approximately equal to the top and bottom of the cross section. Placed in.

On the other hand, the PC steel after service has a negative bending moment in which the stress on the upper slab side is tensioned near the intermediate fulcrum, and the stress on the lower slab side near the center of the span due to dead loads and live loads. Resist the positive bending moment that is tensile. Therefore, the desirable arrangement of the PC steel material after service is on the upper floor slab side near the intermediate fulcrum and on the lower floor slab side near the center of the span.
JP 2004-019126 A ([0008]-[0016], FIGS. 1 to 6) JP 2001-214414 A ([0009]-[0066], FIGS. 1-10)

  However, since the inner steel material arranged in the member of the PC box girder is complicated to release and remove the tension after completion of the extrusion construction, it is generally left in the member even after completion. Therefore, the inner steel material on the upper floor slab may generate tensile stress in the lower floor slab due to its prestressing force, and as a result, the tensile stress due to bending moment acting due to dead load, live load, etc. in the cross section near the center of the span. And the tensile stress due to the pre-stress force may overlap and adversely affect the PC box girder. Similarly, the inner steel material on the lower floor slab may adversely affect the PC box girder near the middle fulcrum, so new PC steel on the lower slab near the center of the span and on the upper slab near the middle fulcrum. Etc., and the construction is complicated, and the amount of steel is increased, which is uneconomical.

  In addition, when using an external cable, the combined external cable to be left after completion of extrusion laying is placed on the upper floor slab near the middle fulcrum and on the lower floor slab near the center of the span as described above. On the other hand, the cable is placed near the middle fulcrum on the lower floor slab and near the center between the upper slabs. In other words, the combined external cable and the temporary external cable are arranged so as to intersect between the intermediate fulcrum and the vicinity of the center of the span to cope with positive and negative bending moments during the extrusion installation. Therefore, there is a problem that the operation of arranging these cables at predetermined positions is complicated within the limited cross section of the PC box girder. In addition, the temporary outer cable is damaged due to wedges during extrusion construction, so there is a problem in quality for reuse, and after releasing the cable tension and winding it, it is moved again to the predetermined position. Since the work to carry is complicated, etc., it is disposed of after the extrusion. For this reason, expensive PC steel materials are discarded only by short-term use, which is uneconomical.

  Furthermore, since the PC box girder used for extrusion construction generally includes a member having a relatively large and thick cross section in which the cross girder and the main girder are integrally manufactured, the weight of the girder at the time of extrusion construction increases. For this reason, it is necessary to increase the PC steel material for coping with the bending moment due to the girder's own weight, and there is a problem that it may be uneconomical.

  An object of the present invention is to solve the above-mentioned problems, and an unnecessary cable is not left in the PC box girder cross section after completion, and the PC is disposed only after a short period of use. It is an object of the present invention to propose a PC box girder extrusion construction method with excellent workability and economy by reducing the steel material and reducing the weight of the PC box girder at the time of extrusion construction.

In order to solve the above-mentioned problem, the invention described in claim 1 is formed in a box shape having an inner space by a web member erected on the left and right sides and a flange member laterally provided on the upper and lower ends of the both web members. The box girder member includes an inner steel material disposed in a cross section of the box girder member, an upper erection outer steel material disposed in an upper portion of the inner space of the box girder member, and a lower erection member disposed in a lower portion of the inner space. A PC box girder construction process in which a tensile force is applied so that the upper and lower compressive stresses of the box girder members are substantially equal to each other by a steel material, and at least two are integrated into a PC box girder, and the PC box from behind the fulcrum A PC for building a bridge by bridging the PC box girder between the fulcrums at both ends by performing at least one time the PC box girder pushing process for extruding the PC box girder constructed by the girder construction process forward a box girder extruded construction method, the PC box girder Including an outer steel material rearrangement step performed after cross-linking and a cross beam portion placing step performed after the outer steel material rearrangement step, and in the outer steel material rearrangement step, tension is applied by the inner steel material. The upper erected outer steel material and the lower erected outer steel material are partially rearranged in the lower part of the inner space or the upper part of the inner space, respectively, and in the cross beam placing process, the fulcrum of the both ends and the fulcrum of the both ends It is characterized and Turkey to build a transverse girder to close a portion of the hollow portion in the intermediate fulcrum on the bridge which is supported by an intermediate support point disposed between.

  In this PC box girder extrusion construction method, since the horizontal girder portion is cast after the PC box girder is bridged, it is relatively light in the PC box girder extrusion process, and conventionally, a relatively heavy PC box girder is extruded and erected. In this case, it is possible to reduce the PC steel material required only to cope with the bending moment generated by the weight of the girder. In addition, the PC box girder has a continuous inner space without being blocked by the horizontal girder part when the PC box girder is constructed and when the PC box girder is pushed and installed. Therefore, it is possible to easily arrange, rearrange, or remove the outer steel material, which improves workability.

Moreover, invention of Claim 2 is the PC box girder extrusion construction method of Claim 1, Comprising: In the said outer-steel material rearrangement process, the bending moment that the said PC box girder becomes convex downward is provided. Change the position of the upper erected outer steel material to the lower part of the inner space at the position where it acts, and change the position of the lower erected outer steel material to the upper part of the inner space at the position where the bending moment acts so that the PC box girder protrudes upward It is characterized in that.

This PC box girder extrusion construction method is an effective PC in response to changes in each stress applied to the PC box girder during extrusion construction and after completion of extrusion construction by changing the arrangement of the predetermined outer steel material. Since it is possible to arrange steel materials, it is possible to reduce waste of resources and reduce material costs by reducing the amount of PC steel materials disposed of only by short-term use.
Here, the effective position means a position that can resist the bending moment acting on the PC box girder. For example, when the bending moment acts in a direction in which the bridge is convex downward, the lower side of the PC box girder PC steel material is placed on the side to develop a resistance moment that protrudes upward, and on the other hand, if the bending moment acts in the direction that the bridge protrudes upward, the PC steel material is placed on the upper side of the PC box girder. Thus, a resistance moment that protrudes downward is developed.

The invention described in claim 3 is the PC box girder extrusion construction method according to claim 1 or 2, wherein the upper construction outer steel material and the lower construction outer steel material are temporarily set during the extrusion construction. It is characterized by being fixed by a member.

Such a PC box girder extrusion construction method uses a place damaged by a wedge at the time of extrusion construction because the outer steel material is fixed at a position different from the fixing position of the outer steel material at the time of completion by using a temporary setting attachment member at the time of extrusion construction. The outer steel material can be rearranged and reused after the extrusion has been installed.
Here, if the outer steel material is covered with a protective material, it is preferable because rust prevention after completion of the extrusion can be achieved.

  The PC box girder extrusion method of the present invention makes it possible to construct a PC box girder bridge excellent in workability and economy.

  Preferred embodiments of the present invention will be described with reference to the drawings. In the description, the same reference numerals are used for the same elements, and duplicate descriptions are omitted.

  FIG. 1 is a side view showing an outline of a bridge 1 (PC box girder bridge) constructed by a PC box girder extrusion construction method of the present invention, and FIG. 2 is one span of a PC box girder 10 of the bridge 1 shown in FIG. These are side views, (a) shows when the extrusion is erected, and (b) shows after rearrangement of the outer steel material. Moreover, FIG. 3 has shown sectional drawing of the box girder member 20 which comprises the PC box girder 10 shown to Fig.2 (a), (a) is an AA cross section, (b) is a BB cross section, (C) has shown the CC cross section.

As shown in FIG. 1, in the present embodiment, the bridge 1 supported by an abutment (fulcrum) 2 constructed at both ends and two piers (intermediate fulcrum) 3 constructed between the two abutments 2. explain.
The bridge 1 is constructed by constructing three PC box girders 10 between three abutments between the abutment 2 and the pier 3 or both piers 3 and successively bridging them.

  FIG. 2 (a) is a diagram showing a PC box girder 10 that is bridged between the middle piers 3 and 3 among the three branches of the bridge 1 shown in FIG. There are two intermediate partition walls 26 at approximately equal intervals. Hereinafter, the upper part of both piers 3, 3 of the PC box girder 10 is referred to as a fulcrum box girder part 20a, and the part where the intermediate partition wall 26 is disposed is referred to as an intermediate partition part 20b.

  In the inner space of the PC box girder 10, the fulcrum box girder part 20a is arranged at the upper part and the intermediate partition wall part 20b is arranged at the lower part, and the combined outer steel material 41 bent linearly, An upper erected outer steel material 42 disposed at the upper part of the inner space through the extension and a lower erected outer steel material 43 disposed at the lower part of the inner space through the entire extension of the support are disposed. Further, in the member cross section of the PC box girder 10, an inner steel material (not shown) is disposed at a predetermined position.

  The PC box girder 10 according to the present embodiment includes a cross section of a general portion in which the inner space 24 shown in FIG. 3A is opened, and a cross girder portion in the inner space 24 above the pier 3 shown in FIG. Three different types of cross-sections are constructed in accordance with the position of the PC box girder 10, that is, the cross-section for constructing the intermediate partition wall 26 in the inner space 24 shown in FIG.

As shown in FIG. 3 (a), the PC box girder 10 includes an inner space from left and right web members 21, 21 and flange members 22, 23 provided horizontally at the upper and lower ends of the left and right web members 21, 21. A box girder member 20 which is a precast member formed in a box shape having 24 is integrated by tension of a plurality of inner steel materials and outer steel materials. The upper flange member 22 is longer than the lower flange member 23, and both ends thereof protrude from the left and right web members 21 and 21.
The upper flange member 22 of the box girder member 20 is provided with twelve insertion holes (hereinafter referred to as “upper inner steel material holes”) 31 for inserting the inner steel material, and the inner steel material is inserted into the lower flange member 23. Eight insertion holes (hereinafter referred to as “lower inner steel hole”) 32 are provided.

As shown in FIG. 3B, the fulcrum box girder 20a has a cross section of an upper horizontal wall 25a provided so as to seal the upper portion of the inner space 24 and two vertical walls standing below the upper horizontal wall 25a. The walls 25b and 25b are divided into three chambers, a central inspection path 24a and left and right cross beam spaces 24b and 24b.
At the bottoms of the left and right lateral girder spaces 24b, 24b, four concave and convex notches 33 for arranging the outer steel material are provided. In addition, upper and lower steel holes 34 for arranging outer steel members are divided into a lower step 34a and an upper step 34b, respectively, in four locations near the upper portions of the left and right cross beam spaces 24b and 24b of the upper horizontal wall 25a. .

As shown in FIGS. 2 (a) and 3 (c), the intermediate partition wall 26 is provided in the inner space 24 of the box girder member 20b, has a base portion 26a and a wall portion 26b, and the side cross section is inverted T. The character shape is shown.
Further, the intermediate partition wall 26 has a space 26c having a width of approximately 1/3 of the interval between the left and right web members 21 at the center, and has a notch 35 for arranging an outer steel material at the upper and lower corners of the space 26c. ing. Further, in the base portion 26a of the intermediate partition wall 26, lower outer steel material holes 36 are provided at predetermined intervals at three positions on the left and right.

Hereinafter, it describes about the work procedure of the PC box girder extrusion construction method concerning the present invention.
FIG. 4 is a flowchart showing the work procedure of the PC box girder extrusion construction method according to the present embodiment. The PC box girder construction step S1, the PC box girder extrusion step S2, the outer steel material rearrangement step S3, and the cross girder portion punching. And installation step S4.
FIG. 5 is a cross-sectional view showing the arrangement of the outer steel material when the PC box girder 20 is extruded and the arrangement of the outer steel material when completed, arranged side by side. FIG. B section, (b) shows the CC section of FIG.
Furthermore, FIG. 6 is a detailed view showing the wedge fixing position when the extrusion is installed and when it is completed.

[PC box girder construction process]
In the PC box girder construction step S <b> 1, a plurality of box girder members 20 which are precast members are integrated by arranging and tensioning a plurality of steel materials inside and outside the box girder member 20 to construct the PC box girder 10.
First, the inner steel material 40 is inserted into the upper inner steel material hole 31 and the lower inner steel material hole 32 through one branch of the PC box girder 10 (see the left cross section in FIG. 5A and the left cross section in FIG. 5B). Each outer steel material 41, 42, 43 is disposed in the notches 33, 35, the upper outer steel material hole 34, and the lower outer steel material hole 36, and tension is applied to all the steel materials, so that the number required for one support is obtained. The box girder member 20 is joined.
At this time, both ends of the PC box girder 10 between one branch are fulcrum box girder portions 20a.

  Here, at the time of erection of the PC box girder bridge, the both ends of the combined outer steel material 41, which are fixed through after completion, are inserted into the upper outer steel material hole 34 in the fulcrum box girder portion 20a and arranged in the horizontal girder 25. Fix using a pressure plate. And in the intermediate partition 20b, it inserts in the lower outer steel material hole 36 provided in the base 26a of the intermediate partition 26.

  Further, the upper and outer steel members 42 are disposed in the upper portion of the inner space 24 of the box girder member 20 through the entire length of one branch of the PC box girder 10. That is, the intermediate partition wall portion 20b is disposed in the notch 35 provided at the upper corner of the space 26c of the box girder member 20b, and the fulcrum box girder portion 20a is provided with the upper and outer steel material holes provided in the upper horizontal wall 25a. 34. The upper and outer steel members 42 are fixed by the temporary bracket 50 at the fulcrum box girder 20a.

  The lower outer steel material 43 is disposed in the lower portion of the inner space 24 of the box girder member 20 through the entire length of one branch of the PC box girder 10, opposite to the upper outer steel material 42. That is, the intermediate partition wall portion 20b is inserted into the lower outer steel hole 36 provided in the base portion 26a of the intermediate partition wall 26, and the fulcrum box girder portion 20a is provided at the bottom of the left and right transverse beam spaces 24b and 24b. Arranged in the notch 33. The lower outer steel material 43 is also fixed by the temporary bracket 50 at the fulcrum box girder 20a in the same manner as the upper outer steel material 42.

[PC box girder extrusion process]
In the PC box girder extrusion step S2, the PC box girder 10 is bridged between the fulcrums by extruding the integrally formed PC box girder 10 from the rear of the abutment in the PC box girder construction step S1.

  And PC box girder construction process S1 and PC box girder extrusion process S2 are repeated, and the bridge of a desired extension is bridged by continuing PC box girder 10 between three branches (refer to Drawing 1). Here, the PC box girder 10 is connected such that the adjacent PC box girders 10 and 10 have four notches 33a, 33b, 33c and 33d of the fulcrum box girder 20a and the lower and upper stages 34a and 34b of the upper outer steel hole 34. (See FIG. 3B), and the same fulcrum box girder 20a is used for integration.

[Outer steel material rearrangement process]
In the outer steel material rearrangement step S3, the upper and outer steel members disposed in the inner space 24 of each box girder member 20 are completed when the PC box girder 10 is completely cross-linked by the PC box girder construction step S1 and the PC box girder extrusion step S2. The tension of 42 and the lower outer steel material 43 is once released and rearranged.

  That is, in the fulcrum box girder part 20a, as shown in the left cross section of FIG. 5 (a), the lower outer steel material 43 disposed in the notch 33 at the bottom of the transverse girder spaces 24b, 24b at the time of extrusion erection, As shown in the right cross section of FIG. Further, in the intermediate partition wall portion 20b, as shown in the left cross section of FIG. 5B, the upper and outer steel members 42 arranged in the upper cutout 35 of the space 26c are shown in the right cross section of FIG. 5B. In this manner, the lower cutout 35 is moved.

  The rearrangement of the upper outer steel material 42 and the lower outer steel material 43 is performed so as to be an effective arrangement with respect to the bending moment acting after the bridge of the PC box girder 10, as shown in FIG. Similar to the combined outer steel material 41, the upper outer steel material 42 and the lower outer steel material 43 are arranged at the upper part in the fulcrum box girder part 20a and are arranged at the lower part in the intermediate partition wall part 20b.

  Here, each of the outer steel members 41, 42, 43 is removed from the temporary bracket 50 once the tension is released, and is cut at the cutting position A as shown in FIG. Without using the wedge fixing position X at the time of extrusion, the tension force P is applied with the new wedge-free position as a wedge fixing position Y at the time of completion.

[Horizontal girder placement process]
In the cross girder portion placing step S4, in the outer steel material rearrangement step S3, the upper outer steel material 42 and the lower outer steel material 43 are rearranged, and when tension is applied, as shown in the right cross section of FIG. 5 (a), Concrete is cast in the cross beam spaces 24b and 24b of the fulcrum box girder 20a to construct the middle wall 25c, and the cross girder 25 integrated with the upper horizontal wall 25a and the vertical wall 25b is constructed. Also in the intermediate partition wall portion 20b, as shown in FIG. 5B, a bottom concrete 26d is placed at the bottom portion of the space 26c so that the bottom portion of the space 26c has the same height as the base portion 26a of the intermediate partition wall 26. To. At this time, a preliminary steel material hole may be provided if necessary.

Next, the operation and effect of the PC box girder extrusion construction method of the present invention will be described.
In the present embodiment, by opening the cross beam spaces 24b, 24b of the fulcrum box girder portion 20a at the time of extrusion installation, the fulcrum box girder portion 20a can be reduced in weight, and the cross beam space 24b, Compared to the conventional construction method that is heavy because the cross beam portion 25 is constructed in 24b, it is possible to reduce the tension required for extrusion erection, so the amount of steel material of the inner steel material or outer steel material can be reduced. It becomes possible.

  In addition, the rearrangement of the lower outer steel material 43 disposed in the notch 33 is also completed by simply removing the lower outer steel material 43 from the notch 33 and inserting it into the upper outer steel material hole 34 and fixing it. It is possible to complete the work without requiring a troublesome work such as once removing the steel material and then winding it up and rearranging it.

  In addition, the rear outer steel material 42 is rearranged in the space 26c only by moving from the upper cutout 35 to the lower cutout 35 in the space 26c. There is no need for correction, and the rearrangement work of the upper and outer steel members 42 is easily completed.

  And if transfer of the outer steel material of the intermediate partition part 20b is completed, the shift | offset | difference of the transverse direction of the outer steel material arrange | positioned by the lower notch 35 will be suppressed by placing bottom concrete 26d in the space 26c. Is possible.

  Further, since the outer steel members 41, 42, and 43 are fixed using the temporary bracket 50 in the fulcrum box girder portion 20a, the outer steel members 41 are extended at positions longer than the outer steel members at the time of completion. , 42 and 43 are fixed after the extrusion has been installed, the temporary bracket 50 is removed and the fixing portion is not used. Therefore, the portion damaged by the wedge biting is not used, and the strength of the predetermined steel material is maintained. It can be reused as it is.

Moreover, about the arrangement | positioning in the fulcrum box girder part 20a of the lower outer steel material 43 extended from the adjacent PC box girder 10 and 10, it was set as the structure arrange | positioned alternately using the notch 33, The fulcrum box girder part 20a Therefore, no special reinforcement is required without generating a local tensile force.
Similarly, since the combined outer steel material 41 and the upper outer steel material 42 are arranged by using the upper and outer steel material holes 34 arranged so that the load is evenly applied to the cross beam portion 25, a local tensile force is generated. The structure which does not generate | occur | produce and does not require special reinforcement is attained.

  Therefore, by the PC box girder extrusion construction method of the present invention, the outer steel members 41, 42, 43 are arranged so that the upper and lower compressive stresses are equalized at the time of extrusion construction, and after the extrusion construction, the arrangement of the outer steel material is changed. In order to cope with bending moments due to dead loads and live loads, it is possible to reduce waste of expensive PC steel (outer steel materials) and to reduce the amount of steel materials and the number of work days through easy work. Costs required for the bridge construction can be greatly reduced.

As mentioned above, although the example of suitable embodiment was demonstrated about this invention, this invention is not limited to the said embodiment, A design change is possible suitably in the range which does not deviate from the meaning of this invention.
For example, in the above-described embodiment, the outer steel material is disposed only in the inner space of the PC box girder. However, if necessary, the outer steel material may be disposed above the PC box girder to apply tension. The arrangement of the outer steel material is appropriately set.

  Moreover, in the above-described embodiment, the box girder member in which the intermediate partition wall is preliminarily placed is used. However, the present invention is not limited to this. An intermediate partition may be formed.

Further, the number of inner steel materials, the number of outer steel materials, standards, etc. shall be appropriately set according to the scale and situation of the bridge, and it goes without saying that they are not limited to those described in the above embodiment. Absent.
Moreover, in the said embodiment, although the number of the upper and outer steel material holes provided in a fulcrum box girder part was made into 16 in total, it is not limited to this, The number shall be determined suitably. Similarly, the number of each notch, lower outer steel material hole, and inner steel material hole is not limited, and the number is appropriately determined.

In the above embodiment, the tension is applied by the inner steel material and the outer steel material disposed in the inner space. However, the present invention is not limited to this. For example, on the road surface above the PC box girder. The outer steel material may be disposed after the temporary bracket is fixed.
Further, in the above-described embodiment, when jointing adjacent PC box girders, the combined outer steel material and the upper outer steel material are used separately for the upper stage and the lower stage, but the structure may be arranged alternately. The arrangement is not limited as long as the compressive force is uniformly applied in the girder member surface and no bending moment is generated.

It is a side view which shows the outline of the PC box girder bridge constructed | assembled by the PC box girder extrusion construction method of this invention. It is a side view which shows one span of PC box girder of the bridge shown in FIG. 1, (a) is at the time of extrusion construction, (b) has shown after outer steel material rearrangement. Sectional drawing of the box girder member which comprises the PC box girder shown to Fig.2 (a) is shown, (a) is AA cross section, (b) is BB cross section, (c) is CC cross section. Is shown. It is a flowchart which shows the operation | movement procedure of PC box girder extrusion construction method. It is sectional drawing which showed the arrangement situation of the outer steel material at the time of extrusion construction of the PC box girder 20, and the arrangement situation of the outer steel material after the outer steel material rearrangement side by side, respectively, (a) is a BB cross section of FIG. (B) has shown the CC cross section of FIG. It is the detailed figure which showed the wedge fixing position at the time of extrusion erection and completion.

Explanation of symbols

1 Bridge 2 Abutment (fulcrum)
3 Pier (intermediate fulcrum)
DESCRIPTION OF SYMBOLS 10 PC box girder 20 Box girder member 21 Web member 22 Upper flange member 23 Lower flange member 24 Inner space 25 Horizontal girder part 26 Intermediate partition 40 Inner steel material 41 Combined outer steel material 42 Upper outer steel material 43 Lower outer steel material

Claims (3)

  1. A box girder member formed in a box shape having an inner space by a web member erected on the left and right and flange members horizontally disposed on the upper and lower ends of both web members is disposed in the member cross section of the box girder member. The upper and lower compressive stresses of the box girder member are made substantially equal by the inner steel material to be formed, the upper erected outer steel material disposed in the upper portion of the inner space of the box girder member, and the lower erected outer steel material disposed in the lower portion of the inner space. A PC box girder construction process in which at least two or more pieces are integrated into a PC box girder,
    A PC box girder pushing step of pushing the PC box girder constructed by the PC box girder construction step forward from a fulcrum;
    A PC box girder extrusion construction method in which the PC box girder is bridged between fulcrums at both ends by performing at least once to construct a bridge,
    Including an outer steel material rearrangement step performed after cross-linking of the PC box girders, and a cross beam portion placing step performed after the outer steel material rearrangement step,
    In the outer steel material rearrangement step, with the tension applied by the inner steel material, the upper erected outer steel material and the lower erected outer steel material are partially rearranged to the lower part of the inner space or the upper part of the inner space,
    In the cross beam placing process, a part of the inner space on the intermediate fulcrum of the bridge supported by the fulcrum of the both ends and the intermediate fulcrum arranged between the fulcrums of the both ends is closed. It characterized the Turkey to build a crossbeam portion, PC box girder extruded erection method.
  2. In the outer steel material rearrangement step, at a position where a bending moment is applied such that the PC box girder protrudes downward, the arrangement of the upper erected outer steel material is changed to the lower part of the inner space, and the PC box girder protrudes upward. 2. The PC box girder extrusion construction method according to claim 1, wherein an arrangement of the lower erection outer steel material is changed to an upper part of the inner space at a position where a bending moment acts .
  3. The PC box girder extrusion construction method according to claim 1 or 2, wherein the upper construction outer steel material and the lower construction outer steel material are fixed by a temporary setting attachment member during extrusion construction.
JP2004077557A 2004-03-18 2004-03-18 PC box girder extrusion construction method Expired - Fee Related JP4355240B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004077557A JP4355240B2 (en) 2004-03-18 2004-03-18 PC box girder extrusion construction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004077557A JP4355240B2 (en) 2004-03-18 2004-03-18 PC box girder extrusion construction method

Publications (2)

Publication Number Publication Date
JP2005264533A JP2005264533A (en) 2005-09-29
JP4355240B2 true JP4355240B2 (en) 2009-10-28

Family

ID=35089370

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004077557A Expired - Fee Related JP4355240B2 (en) 2004-03-18 2004-03-18 PC box girder extrusion construction method

Country Status (1)

Country Link
JP (1) JP4355240B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101967800A (en) * 2010-11-17 2011-02-09 中铁二十四局集团有限公司 Erecting, pushing and sliding method of steel box beam
CN105696470A (en) * 2016-01-18 2016-06-22 中国铁建大桥工程局集团有限公司 Synchronous quick steel box girder in-situ incremental launching and tower column construction method
CN106638319A (en) * 2016-12-05 2017-05-10 中铁五局集团贵州工程有限公司 Sleeve fastening device for finish-rolled threaded reinforcing bar anchorage device
CN106869033A (en) * 2017-03-09 2017-06-20 中铁十九局集团有限公司 The box girder pre-stressed pipeline pneumatic mortar packing control method of large-sized concrete

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100420793C (en) * 2006-06-28 2008-09-24 中铁大桥勘测设计院有限公司 Double breadth prestressed concrete seamless connection bridge
KR100943823B1 (en) 2009-10-09 2010-02-25 한우물중공업(주) Girder compounded with the concrete and steel
CN102477717B (en) * 2010-11-30 2016-03-09 上海市政工程设计研究总院 A kind of bridge pushing construction method
KR101245620B1 (en) * 2010-12-15 2013-03-20 진승영 Incremental launching method using temporary binder
CN102182147B (en) * 2011-03-31 2012-12-05 中铁港航局集团第二工程有限公司 Steel box girder erection method
KR101169012B1 (en) 2011-09-20 2012-07-26 우경기술주식회사 Psc box girder and it's construction method
CN102691268A (en) * 2012-06-12 2012-09-26 宁波二十冶建设有限公司 Stretching construction process of super-long prestressed tendon
CN102720143B (en) * 2012-06-30 2014-07-30 中铁二十三局集团有限公司 Guide beam and installation and disassembly method thereof
CN103233419B (en) * 2013-01-09 2015-09-30 重庆交通大学 A kind of prestress concrete variable cross-section box bridge and construction method thereof
CN103031804B (en) * 2013-01-09 2015-04-08 重庆交通大学 Slant leg rigid frame built-in prestressed concrete variable cross-section box girder bridge and construction method thereof
CN103821079B (en) * 2014-03-14 2016-08-24 湖南大学 A kind of combined box beam bridge spanning the sea and construction method thereof
CN103981812B (en) * 2014-05-29 2015-04-29 厦门中平公路勘察设计院有限公司 Beam-end prestress tension process and continuous box girder structure
CN104532745B (en) * 2014-12-11 2016-06-08 中建六局土木工程有限公司 Long span variable cross-section prestressing force beam bridge prestressing without bondn rod iron installation method
CN105568866B (en) * 2015-12-31 2017-06-23 中铁二十局集团第六工程有限公司 Across the large-span steel box beam push construction method of existing road
CN106758824B (en) * 2016-11-21 2018-08-07 武汉理工大学 Long span Curved Beam Bridge tension of prestressed tendon method
CN106758742B (en) * 2016-12-29 2019-08-23 中国一冶集团有限公司 A kind of curved variable cross-section fish-bellied type Steel Continuous Box beam and its construction method
CN107268418B (en) * 2017-05-23 2019-01-11 中建钢构有限公司 The steel box-girder and its poly-machine lifting crane installation method of bicycle expressway

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101967800A (en) * 2010-11-17 2011-02-09 中铁二十四局集团有限公司 Erecting, pushing and sliding method of steel box beam
CN101967800B (en) * 2010-11-17 2011-11-30 中铁二十四局集团有限公司 Erecting, pushing and sliding method of steel box beam
CN105696470A (en) * 2016-01-18 2016-06-22 中国铁建大桥工程局集团有限公司 Synchronous quick steel box girder in-situ incremental launching and tower column construction method
CN105696470B (en) * 2016-01-18 2017-05-17 中国铁建大桥工程局集团有限公司 Synchronous quick steel box girder in-situ incremental launching and tower column construction method
CN106638319A (en) * 2016-12-05 2017-05-10 中铁五局集团贵州工程有限公司 Sleeve fastening device for finish-rolled threaded reinforcing bar anchorage device
CN106869033A (en) * 2017-03-09 2017-06-20 中铁十九局集团有限公司 The box girder pre-stressed pipeline pneumatic mortar packing control method of large-sized concrete

Also Published As

Publication number Publication date
JP2005264533A (en) 2005-09-29

Similar Documents

Publication Publication Date Title
KR100423757B1 (en) Prestressed composite truss girder and construction method of the same
US6293063B2 (en) Cast-in-place hybrid building system
US7373683B2 (en) Construction method for prestressed concrete girder bridges
KR100536489B1 (en) Manufacturing method for prestressed steel composite girder and prestressed steel composite girder thereby
US9518401B2 (en) Open web composite shear connector construction
KR101144586B1 (en) Steel built-up beam having closed section for applying long span and reduction of height and concrete filled composite beam system using the same
KR100621539B1 (en) Method for connecting continuously P.S.C-Ibeam by steel bracket and its structure
KR100543969B1 (en) Composite rigid-frame bridge installing prestressed compound beam to the contral point of the slab of rigid-frame bridge and connecting the beam to the steel member installed in the upper of pole, and construction method thereof
KR100549649B1 (en) Precast Tall Pier for Bridge
JP5945418B2 (en) How to build a box girder bridge
KR100770574B1 (en) Rhamen bridge having prestressed steel-reinforced concrete composite girder and construction method there of
AU754130B1 (en) Building structural element
KR101178876B1 (en) Prestressed composit rahmen bridge construdtion method
KR101107300B1 (en) Steel plate shear wall
JP3701250B2 (en) Cable stayed bridge and its construction method
JP2004137686A (en) Composite panel structure, panel bridge structure and construction method for continuous composite girder bridge
KR100427405B1 (en) Pssc complex girder
KR20120016863A (en) Bridge construction method to adjust curvature for psc t-girder
JP3737475B2 (en) Box girder bridge structure and construction method
JP2006022595A (en) Main pilot girder, main girder structure for erection of box girder bridge and erection method of the box girder bridge
KR101208231B1 (en) Method for constructing continuous supporting structure of corrugated steel web PSC beam
KR100565864B1 (en) Construction method of concrete arch through bridge combined with prestressed concrete box girder
KR20090001261A (en) Prestressed concrete girder bridge having connecting structure using steel bar, and constructing method thereof
JP2005061127A (en) Concrete prefabricated frame structure
KR20050052040A (en) Composite girder for bridge and construction method

Legal Events

Date Code Title Description
A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20050523

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20070219

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20081218

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A711

Effective date: 20081226

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20081226

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20090217

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20090407

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20090721

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20090731

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120807

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120807

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150807

Year of fee payment: 6

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees