JPH05509370A - Construction equipment and methods - Google Patents

Abstract

A bridge construction system includes a first independent longitudinal truss (40) positioned over a first bridge section (2), and a second independent longitudinal truss (40a) positioned over a second section (4). A gantry (50) is movably mounted on the trusses (40, 40a), the gantry (50) having a first leg (210) mounted to the first truss (40) and a second leg (200) mounted to the second truss (40a), the gantry (50) being drivable along the first and second trusses (40, 40a). A gantry drive (940) is provided for controllably driving the gantry (50) along the trusses (40, 40a). A transverse trolley (240) is movably mounted on the gantry (50), the trolley (240) being drivable along the gantry (50) in a direction generally transverse to the longitudinal trusses (40, 40a). The trolley (240) includes a winch (260) for lifting and carrying bridge components to be positioned along the bridge spans over which the longitudinal trusses (40, 40a) are mounted. The trolley (240) is selectively positionable over each of the bridge sections (2, 4).

Description

[Detailed description of the invention] The invention relates to the field of bridge construction, and more particularly to the field of bridge construction. type of bridge, especially one with a large number of cross-sections, in which continuous bridge segments are located Relates to construction that is fixed and attached to existing bridge components.

Background technology Precast segmental bridges are known and can be used to cross mountainous terrain or is commonly used around the world as a means of making roads across rivers and other natural barriers. used.

Such bridges are typically constructed according to the following sequence, which begins with a series of vertical bridges. Legs are formed along the horizontal stitches. Afterwards, the bridge section was made into a cantilevered structure. The precast segments are sequentially attached to the previously completed bridge component and then are added to each pier by post-tensioning the segments. . Cantilevered bridge sections ensure that the piers are not exposed to excessive bending loads. They are added to each pier in a symmetrical manner. Cantilever structure safety control is completed. When completed, the ends are post-tensioned together and connected without breaking. Form a bridge deck. Typically, between two such horizontal sets accommodates movement in two directions. It will be constructed in such a way that These spans generally run side by side, but they do not have to be parallel. They do not need to be the same height (horizontally or vertically).

The prior art employed in the construction of precast segmental bridges is one at a time. It relies on the use of a single piece of equipment capable of building two decks, one side of the bridge It starts at one end and ends at the other end. When building several decks, one device must be used repeatedly or two or more devices must be used simultaneously. I had to. Either option added significant time and expense to bridge construction. .

The most frequently used technology in the past was the launcher mounted on the top of a deck under construction. Including the use of launching girders. Such technology is available in Brazil, for example. (B ``azil'' glue used on Rio-Nite + oi bridges) where four (4) launching girders (two at each end of the bridge) are at the same height. was used simultaneously to construct two (2) parallel decks. Similarly, Chiffon'/ 1aduc)+), a single launching girder connects two parallel beams at different heights. It was used to build tsuki, and each tsuki was built independently one after the other.

Disclosure of invention It is an object of this invention that a minimum number of construction components are required and that the construction time is Precast segments, dramatically reduced for intersegmental bridges The purpose of this invention is to provide a construction system for constructing bridges of various shapes.

A further object of the invention is to provide a large number of span segments whose spans are not parallel to the height direction. The purpose of the present invention is to provide a construction system for simultaneously constructing several types of bridges.

A further object of the invention is to provide a large number of span segments in which the horizontal assemblies are not parallel to the horizontal direction. The purpose of the present invention is to provide a construction system for a T-shaped bridge.

A further object of the invention is to provide a plurality of span segment configurations with different heights between the horizontal assemblies. is to provide a construction system for bridges. − A further object of the invention is to provide a multi-span segment with varying lateral spacing between the spans. The purpose of the present invention is to provide a construction system for a T-shaped bridge.

The invention is therefore directed to a construction system for bridges with multiple span segments. It is carried out in a pair of independent trusses positioned above the outer cross section. can be done.

The truss is used to continuously lift bridge segments for connections between multiple transoms. Transverse gantry with trolley and winch system for transporting This is to give the crane a route. According to one aspect of this invention, the a first independent longitudinal truss positioned over a first horizontal interspace; a first independent longitudinal truss positioned over a second horizontal interposition; a second independent longitudinal truss positioned, a guide movably mounted on the truss; A gantry crane is provided, and the gantry crane is a first gantry crane attached to the first truss. and a second leg attached to the second truss, and further includes a guide along the truss. Gantry crane drive device, Gant, for controllably driving storage cranes A transverse trolley is provided that is movably mounted on the reclane, and the trolley is is driveable along the gantry crane in a generally transverse direction to the directional truss; The trolley has a bridge component to be positioned along at least one crosspiece. It includes a winch for lifting and transporting, and the trolley is selectively positioned on each side between the rows. The bridge structure can be installed in a bridge structure with longitudinal trusses placed along each of the horizontal sections. Supports may be provided for attachment to the components.

Brief description of the drawing Figure 1 is a side view of the construction system according to the invention, adjacent to the completed horizontal section. 2 illustrates positioning of the system for constructing a bridge component from a first pier;

FIG. 2 is a cross-sectional view taken along line 2-2 in FIG. 2 shows the construction equipment of FIG. 1 transporting bridge segments for connection; FIG.

FIG. 3 is a side view of the pendulum leg portion of the construction system of FIG. 1.

Figure 3a is a side view of an alternative pendulum leg section of the construction system of Figure 1;

Figure 3b is similar to Figure 1. FIG. 3 is a detailed side view of the pivot connections of the pendulum leg portion of the construction system;

4 is a side view of a side view of the fixed leg portion of the construction system of FIG. 1; FIG.

Figure 4a is a detailed side view of the pivot connections in the fixed leg section of the construction system of Figure 1; Ru.

Figure 4b shows details of the transverse trolley connection in the fixed leg section of the construction system of Figure 1. FIG.

5 is a detailed side view of a portion of the lifting trolley of the construction system of FIG. 1; FIG.

Figure 5a is a detailed front view of the lifting trolley portion of the construction system of Figure 1;

Figure 6 shows the longitudinal truss and associated roller support assembly of the construction system shown in Figure 1. FIG. 3 is a detailed view of the assembly.

7 is a detailed side view of the truss roller support assembly of the construction system of FIG. 1; FIG. .

FIG. 8 shows the truss roller support assembly of FIG. 7 taken along line 8--8 of FIG. FIG. 3 is a detailed cross-sectional view.

FIG. 9 shows the truss roller support assembly of FIG. 7 taken along line 9--9 of FIG. FIG. 3 is a detailed cross-sectional view.

10 shows the truss roller support assembly of FIG. 7 taken along line 10-10 of FIG. It is a detailed cross-sectional view of yellowtail.

Figure 11 shows a detailed view of the gantry crane roller support assembly of the construction system of Figure 1. FIG.

12 shows the gantry crane support of FIG. 11 taken along line 12-12 of FIG. FIG. 3 is a detailed cross-sectional view of the holding roller assembly.

13 shows the gantry crane support of FIG. 11 taken along line 13-13 of FIG. Detailed cross section of the roller assembly with remaining gaps left over from the final precast It will be filled with segment 18o. Similarly, a partially completed cantilever structure Structured bridge sections 22 and 24 extend from the other side of piers 14 and 16. Exists. Section 22 may further combine bridge section 22 with another bridge section or Includes segments 22a-22o for contact with existing roads.

Each section 18a-18o and 22a-220 is alternatively connected to the pier 14. attached to provide symmetrical section reinforcement and eliminate unnecessary bending loads on the piers 14. Avoid putting weight on it. Bridge sections extending from piers 16 are constructed in a similar manner. It will be installed. Each precast segment is pre-tensioned using well-known post-tensioning techniques. be attached to existing bridge components using techniques.

Precautions to be attached to bridge sections 18 and 20 and 22 and 24 The stacked segments are installed using the construction system 30 described herein. conveniently transported and positioned. The construction system 30 is generally one pair. longitudinal trusses 40 and 40a and a rolling gantry crane 50.

Longitudinal truss 40 is attached to end 10 of completed bridge section 2 using mounting supports 60 is supported at one end thereof adjacent to. Vertical truss 40 uses attachment support 70 and is supported on the pier 14 approximately in its middle span. Additional mounting support 80 and 90 may be provided when the partially completed bridge section 22 is constructed. . A similar mounting arrangement is provided for longitudinal truss 40a. rolling gantry crane 50 includes roller assemblies 100 and 100a, each of which is longitudinally oriented. It is rollably mounted on the top of trusses 40 and 40a. Gantry crane drive The moving device (to be described) moves the rolling gantry crane 50 vertically. Provides the motive force for driving along the trusses 40 and 40a. Precast The assembled bridge segments are then assembled into completed bridge ends 10 and 1, as shown in FIG. They are typically delivered to locations adjacent to 2, where they are mounted on rolling gantry cranes. 60 and partially completed bridge sections 18.20.22 and and 24 for installation. Longitudinal range of rolling gantry crane 50 are shown in phantom at both ends of trusses 40 and 40a.

Referring now to FIG. 2, longitudinal trusses 40 and 40a are connected to support assemblies 60 and 40a. and its adjacent inter-horizontal counterpart 60a, respectively. Support assembly 6 0 and 60a include corresponding transverse beam assemblies 110 and 110a.

Beam assemblies 110 and 110a are mounted on completed beam sections 2 and 4. including supported transverse steel beam sections 112 and 112a, respectively; Hydraulic jacks 11 mounted on the bottom of bridge sections 112 and 112a, respectively 4 and 116 and 114a and 116a. In addition, one or more Shims 118 and 118a may be used to adjust the height of the beam section. Ru. The transverse beam sections 112 and 112a have steel tie-downs (lie-do wn) using 120 and 122 and 120a and 122a respectively. and fixed to bridge sections 2 and 4. Transverse beam section 112.112 a respectively a pair of webs 124, 124a and upper and lower flanges 1 A conventional double I-beam structure with 26.126a and 128.128a Good too.

Support assemblies 60 and 60a support roller assemblies 130 and 13, respectively. Further includes 0a. The roller assembly 130 includes a pair of roller units 132 and and 134, while roller assembly 130a includes roller units 132a and 134. and 134a. Support assemblies 60 and 60a are connected to roller units 132. 134 and 132a.

134a, respectively, transverse to transverse beam sections 112 and 112a. Further includes jacks 136 and 136a for directional positioning. How to cross Directed jacks 136 and 136a are locked down 138 and 138a, respectively. upper flanges 126 of transverse beam sections 112 and 112a using and 126a. As shown virtually, roller unit 132 and 134 are laterally repositioned by activating hydraulic jack 136. It is possible to decide. The same is true except that a hydraulic jack 136a is used. This applies to controller units 132a and 134a. As discussed below, Such transverse positioning allows longitudinal trusses 4 to accommodate horizontal bridge span curvature. 0 and 40a.

Still referring to FIG. 2, the horizontal truss 40 is configured in a typical three-sided arrangement; As shown in more detail in FIG. 12, the lower and upper flanges 1 42 and 144, respectively, and a plurality of intermediate webs 146. 140 included. The upper flange 144 is connected to the gantry, as described further below. The crane 50 is provided with a roller bearing surface. One more pair of longitudinal trusses 40 including the lower tension flange. The first lower flange 150 is shown in more detail in FIG. As such, the upper flange 152, lower flange 154 and intermediate includes a web member 156. As discussed below, the lower flange 154 is longitudinally The truss 40 is provided with a lower bearing surface. The longitudinal truss 40 further includes a second lower flange section 160, which itself includes an upper flange 162, a lower flange section 160, and a lower flange section 160. Includes a flange 164 and an intermediate web member 166. Same as lower flange 154 Additionally, the flange 164 also provides a lower bearing surface for the horizontal truss 40.

The horizontal truss 40a has a similar structure and its arrangement and function are similar to that of the horizontal truss. Similar components 140a that are identical to corresponding components 140-160 of base 40 -166a included. The horizontal trusses 40 and 40a further include leg elements 1 70 and 180 and 170a and 180a, respectively.

With further reference to FIG. 2, the rolling gantry crane 50 includes a roller assembly 100. Rollable on top horizontal truss 40 and 4Oa (described in detail below) It is worn in Noh. Gantry crane 50 further includes fixed leg assembly 200 and It includes a pendulum leg assembly 210, both of which are connected to the roller assembly 1 by a ball joint connection. Combined with 00. The rolling gantry crane 50 further includes a transverse truss assembly. 220, which is generally fixedly connected to the fixed leg 200 at the blade end. and the other end is pivotally connected to the pendulum leg 210 via a ball joint connection. Continued. Rollably mounted on the transverse truss assembly 220 is a a lift trolley assembly 240, which includes a winch assembly 260, a lift trolley assembly 240; a spreader beam 280 for carrying the cast segments, and a transverse a roller assembly rollably mounted on the upper portion of truss assembly 220; 300. The lifting trolley assembly further runs in lane 310 and and lift trolley assembly 240 along its transverse drive path. includes a power drive (not shown) that provides motive force for the operation. lifting trolley assembly The extent of the position of the bridge 240 is shown in phantom at both ends of the truss assembly 220. It will be done.

3 and 3a, the pendulum leg assembly of the rolling gantry crane 50 will now be described. Buri 210 is shown in more detail.

As shown therein, the transverse truss assembly of the rolling gantry crane 50 220 has a pair of upper flanges 222 and 222b, respectively. Contains transverse trusses. Each of the flanges 222 and 222b has an upper and a lower The upper flange is attached to a lifting trolley. -240 provides an upper roller bearing surface for the roller assembly 300. crossing Each truss of directional truss assembly 220 further includes a pair of lower flanges 224. and 224b, each having respective upper and lower flanges and intermediate Has a web section. The upper and lower flanges 222 and 224, if and upper and lower flanges 222b and 224b, respectively, have a series of intermediate tips. They are joined by lath members 226 and 226b. Furthermore, the bottom flange 224 ．． Each of 224, 224a, and 224a is a stabilizing beam 2 extending in the vertical direction. 28.

Upper flange 22 of transverse truss assembly 220, as shown in FIG. 3b. 2.222b includes lower extensions 320.320b at each end thereof, and lugs 330. 330b is attached to it. Lugs 330.330b are ball joint connections 340 ．． 340b to the legs of pendulum leg assembly 210. In this way, the ball Joint 340 pivotally connects lug 330 to pendulum legs 350 and 360. Ru.

The locking member 510 can be pivoted to a position where the locking member 510 is The upper flange 126 of No. 2 is engaged.

The locking member is secured thereto by a pair of pin members 515, such as bolts, and and longitudinal support member 505 . in unlocked position , the launching frame assembly 450 supports unrestricted gantry crane movement. upwardly and away from the transverse support beam 112 to facilitate can be pivoted in any direction.

Referring now to FIG. 4, fixed leg assembly 200 of rolling gantry crane 50 is shown. Securing the rolling gantry crane transverse truss assembly 220 With the lower leg ends, upper flanges 222 and 222a each have shoulders 52 at their ends. 0 and 520b. Horizontal stabilizing members 522 and 524 are attached to shoulders 520 and 520b and fixed legs 550 and 570, respectively. fixed leg 550 is fixedly connected to shoulder 520 at one end and has a pair of guards at the other end. longitudinal stabilization beam 390 extending between entry crane roller assembly 100a It is pivotally connected to a. Pivotal support between fixed leg 550 and stabilizing beam 390a Standard attachment is provided by a ball-and-socket connection 560.

Shoulder 520b extending from transverse truss flange 222b is shown in more detail in FIG. As shown in FIG. connected to.

The fixed leg 570 connects to the longitudinal stabilizing beam 39 at its other end via a ball joint connection 560b. It is attached so as to be pivoted to 0a.

. As further shown in FIG. 4b, fixed leg 570 supports jack assembly 590. Lower flange member 224b of gantry crane flange assembly 220 via and stabilizing member 524, and is connected to the rolling gantry crane transverse truss assembly. Provides lateral position adjustment of fixed leg 570 relative to assembly 220. This connection is of the fixed leg assembly 220 due to the pivoting movement of the longitudinal truss 40a during launching. Accommodates twisting motion. In this way, during truss launching, the jack assembly 590 allows fixed leg 570 to pivot freely about pivot connection 580 be loosened to do so. The jack assembly 590 is a longitudinal truss launching system. It is closed again when the sequence is finished.

Referring now to FIGS. 5 and 5a, the lifting drawer assembly 240 is shown in FIG. Shown in detail. In this way, the winch assembly 260 is a power winch drive unit. 600 and a block and tackle system 610. blocks and tabs The buckle system includes upper and lower blocks 612 and 614, respectively.

Precast segments to be transported for installation on bridges under construction are , pivotally connected to the spreader beam 280 using a pair of link members 620 be done. The link 620 is pivoted to the top of the spreader via a pin connection 630. connected to.

Link member 620 has a ball and socket connection 640 on top of the precast segment. and associated mounting lugs 650.

As shown in Figure 5a, the spreader beam 280 is attached to the block and tackle system. The lower prong 614 of the system 610 is pivotally supported via a connecting link 660. connected to the sea urchin. Connecting links 660 are located at spreader beams 280 (not shown). b) pivoted to the spreader beam 280 via a pin connection 670 located in the slot; The beams are connected to provide transverse adjustment of the spreader beam. Link 660 is The lower block 614 of the lock and tackle system 610 has a is mounted via a bearing assembly 680 that allows rotation of link 660. Ru. This precast segment can be used to connect previously constructed bridges in multiple locations. May be manipulated for alignment and placement with components.

With further reference to FIGS. 5 and 5a, hydraulic planetary The winch drive wave ff1600, which may be a winch, drives the roller assembly 30 vertical direction attached to a pair of roller units 700 and 700b of 0, respectively. It is attached to a support beam 690 that extends to. Roller units 700 and 700b are Each includes a pair of support beams 710 and 7+-Ob, and a roller unit 700 is a pair of rollers 720 and 720 installed between roller unit support beams 710. and 730. Similarly, the roller unit 700b is a roller unit supporter. It includes a pair of rollers 720b and 730b mounted on beam 710b. roller unit 700 is a pair of transverse rollers that engage sides of transverse truss flange 222. 740 more. Similarly, roller unit 700b has transverse traction. It includes a pair of transverse rollers 740b that engage sides of the flange 222b.

Roller pairs 720 and 730 of roller unit 700 are transverse truss flanges. Engage the top of 222. Similarly, roller pairs 720b and 730b are Engage the top of truss flange 222b. The roller unit 700.700b is As shown in FIG. Powered for transverse movement along truss flange 222.222b . The movement of the lifting drawer assembly 240 is controlled by a human operator. instructions from the driver's cab 310.

6-10, details of the longitudinal truss support assembly 60 can be seen here. will be explained in. The following discussion regarding longitudinal truss 40 is directed separately. It is understood that the same applies to the longitudinal truss 40a, except that This is because each component of each assembly is virtually identical. child Referring now to FIG. 6, the lower flanges 150 and 160 of the longitudinal truss 40 are Vertical movement on roller units 132 and 134 of truss support assembly 60 It is mounted so that it can roll.

Referring now to FIG. 7, the roller unit] 32 and the lower truss flange 15 0 is shown in a detailed side view, showing the roller unit 134 and the lower truss flange 1 It is understood that the 60 components are the same. Laura Uni.

132 has a longitudinal row of transversely extending pin rollers 810 mounted thereon. a central roller assembly 800 having a central roller assembly 800 having a central roller assembly 800; The pin roller 810 is Provides vertical support to the lower roller bearing surface 154 of the flange 150, which It is supported directly on that basis.

Referring now to FIG. 9, rollers 810 are sequentially supported on a steel support member 814. It will be observed that it floats on the underlying roller 812. support Member 814 is mounted on neoprene pad 816 and provides impact relief to longitudinal truss 40. Give support medium. The roller unit 132 is attached to the upper flange of the transverse beam 112. Thin sheets of polytetrafluoroethylene (TFE) material arranged over 126 817 and a thin sheet of stainless steel 818. Further observations will be made. This means that the roller unit 132 allows for easy transverse repositioning on 2.

The roller unit 132 further includes two pairs of guide rollers 820 (see FIG. 1-0). ). The guide roller 820 guides the top of the lower flange 154 of the truss flange 150. The truss 40 is securely engaged, and the truss 40 is reliably restrained from lifting forces, so that the truss 40 The support assembly 60 is in contact with the support assembly 60 at all appropriate times. Regarding this point, Referring now to FIGS. 7 and 10, the roller unit 160 is mounted on the transverse beam 1 a pair of pivotable locking axes that engage the lower surfaces of the twelve upper flanges 126; 840 and is positively locked in place on the transverse support beam 112. In other words, it will be observed. The locking arm 840 is the roller unit 13 2 through a pin connection 860. The locking arm 840 is located in one of the locking openings 880 in the controller unit 132. Locking pin 870 secures in locked and unlocked positions may be done. As shown in FIGS. 7 and 8, the roller unit 132 is Opposed pairs of traverses that securely engage the sides of the lower flange 154 of the flange 150 Further includes a directional roller 890 to positively restrain truss 40 from transverse movement. Ru.

11-15, gantry crane roller assembly 100 is shown here. It will be explained here. In this regard, the rollers associated with the longitudinal truss 40 It is understood that only units can be referenced, because vertical This is because the roller units associated with the lath 40a have substantially the same structure. B unit 1-OO is the upper bearing surface of the upper longitudinal truss flange 140. 144, including opposing pairs of rollers 900 that positively and rollably engage 144. B The controller unit 100 connects the upper and lower flanges of the longitudinal truss flanges 1-40. further including a pair of lower tension wheels disposed between 144 and 142, respectively. . The tension wheels 910 are separated from the roller unit 100 or the horizontal truss flange 140. prevent separation. The roller unit 100 is located at the top of the horizontal truss flange 140. further including an opposing pair of guide wheels 920 engaging sides of flange 144; This laterally restrains the rolling 100 thereon. Horizontal truss flange 140 The upper flange 144 further has a longitudinally extending rack 930 mounted thereon. Ru.

As shown in FIG. 3, the longitudinal stabilizing member 390 has a rack 930 and a A moving drive device 940 having a pinion gear 960 that is closely meshed and engaged is installed. Ru. The moving drive device 940 is a roller unit 100, thus a rolling gantry crane. 40 is powered for longitudinal movement along the longitudinal truss. Figure 11, fig. 13 and 15, the pivoting leg 350 and its associated ball joint Hand connection 400 is similar to launching leg 460 and its associated ball and socket connection 480. The roller unit 100 is attached to the roller unit 100. FIG. 14 shows the pivot to longitudinal stabilizing member 390. A pivoting connection 400 of supporting leg 360 is shown.

Referring now to Figures 16a-16e, the operation of the construction system described above is illustrated. and launching will now be described, while the following of the longitudinal truss 40 It will be appreciated that the discussion also applies to longitudinal truss 40a.

C. The truss 40 allows three support assemblies 60, 70 and 80 to roll thereon. Installed. The truss 40 initially includes two transverse truss support assemblies 60 and It is listed in 70. The aft support assembly 60 is attached to a previously constructed bridge section or is attached to the existing road and the intermediary support assembly 70 is attached to the bridge piece to be built. It is attached to the pier of the corbel structure. If the pier segment is cast in place , the support assembly 70 rests directly on the pier segment itself.

If the pier segment is a precast unit, the support assembly 70 rests on a temporary frame (not shown). Support assemblies 60 and 70 The committee long positioned the longitudinal truss 40 on top of the bridge deck, so the truss was does not interfere with the placement of each segment. As previously shown, support assembly 60 and and 70 ensure between concrete deck and longitudinal truss 40 for compression. provides a vertical connection and directs bearing and tension through 0-L media. Next an intermediary support assembly 70 on the pier on which the cantilever structure of the bridge is to be constructed; also includes a locking system (not shown), and the truss against longitudinal and horizontal forces. Provides longitudinal stability of 40. The locking system has section lengths of beams 150 and 1. a restraining pin or other extending through the lower flanges 156 and 166 of 56; may include a device for suppressing. Support assemblies 60 and 70 support longitudinal truss 40 and 40a, further providing a transverse positioning of the cross-curve and the cross-cross curvature. Accommodates possible variations in distance.

During bridge construction, the precast bridge segments were pre-finished cantilevered structures. , where they are lifted onto a rolling gantry crane 50. can be picked up by the trolley 240. On water or on the ground where horizontal gaps extend It was also possible to pick up bridge segments from other locations.

Rolling Gantry Crane 50 Cantilevered Precast Segments Under Construction Deliver to the end of the strut structure, where the segment is positioned on the structure and post-textured. is applied.

Starting from the pier 14, the segments are arranged to extend symmetrically therefrom. Ru. A number of paired segments, as shown in Figures 1.6b through 16e, After the ment is in place, the forward support assembly 8o is attached to the front end of the truss 4o. This effectively reduces the length of the cantilevered structure of the truss and Tricrane 5o will continue to rely on the stay cable (stay cabfe) as before. Enables you to carry segments to the end of a concrete deck cantilevered structure without do.

Launching each truss is done in two (2) steps. First, the rear span After 18 is closed and the continuous post tension reinforcement is stressed, the support Assembly 8O is attached to the end of the cantilever structure as shown in Figure 16e. . A rolling gun that provides a longitudinal force that moves the truss 40 through its own kinematics. The tri-crane 5o is tethered onto a central support assembly 70 and serves as a fixed drive point. act. Support member 60 is loosened from the bridge deck. The longitudinal truss 40 is vertically until its front end reaches pier rAJ as shown in Figure 16f. will be moved. The second longitudinal truss 40a is then moved in the same manner.

Following the first launching step, the support assembly 70 is attached to the cantilever structure 22. is moved to the end of the For the temporary support rTJ, see Figure 16g, then support it on the pier 7o. Behind the retainer assembly 60 is tied to the bridge deck. Support assembly 8o is pier rA Moved and installed by J. The support assembly 6° then has a cantilever structure 2 2 and attached, while the support assembly 7o is similar to the temporary support T. Then, it is separated from the bridge deck, as shown in Figure 16h. rolling gantry crane The horn 50 is then moved and connected to the support assembly 80 at the pier rAJ. Ru.

As shown in Figure Z6i, the longitudinal truss 4o has its center of approximation starting from the new Support assembly 8o on the pier rAJ where construction of the new bridge cantilever structure is to begin It is launched forward again until it reaches . The second longitudinal truss 40a is It is moved in the same way. The support assembly 7o is then moved onto the pier rAJ and Once installed, the support assembly 80 is released therefrom and temporarily supported under the truss 40. removed from Other launching sequences are also possible following this teaching. there were.

Now, referring to Figure 1.7-19b, we will explain the run condition where the horizontal writing space has horizontal curvature. The procedure for checking is shown. When the horizontal assembly has horizontal curvature, the truss 40 and and 40a are repositioned laterally during launching to follow the bridge centerline. There must be. This is the support assembly separate from the rolling gantry crane 50. It is carried out on li. In this way, the support assembly to which the gantry crane legs are fixed In this case, the truss rotates only once relative to the gantry crane.

This geometry change changes the pendulum leg assembly 210 to the transverse truss assembly 2. Accommodated by ball joint connection to 20, pin joint and movement adjustment fixed leg imparting relative torsion between assembly 200 and transverse truss assembly 220; I can do it.

Starting from the position shown in Figures 17a1, 17b and 17c, the longitudinal truss 4 0 and 40a during the first launching phase. The truss will be launched in sequence to the truss positions shown in . On that point, the rolling gantry The lanes are positioned with the support assembly 60 and the bracket trusses 40 and 40a are The retainer assembly 70 holds the next cantilever bridge section in the intermediate span. Its forward end by means of a support assembly 8o on the pier rAJ that will be erected. additionally supported by the Department. In this regard, trusses 40 and 40a are shown in FIGS. Position 1. shown in Figure 18c. occupies The truss 40 is then constructed as shown in FIGS. 18b and 18b. The support assembly 60 is rotated to position 2 shown at 18c. Vertical direction The rotation of the directional truss is related to the pendulum leg assembly 210 of the rolling gantry crane 50. This is achieved by first rotating the associated truss. The second truss rotates The jack on the fixed leg assembly 200 of the rolling gantry crane 50 Key assembly 590 is loosened. The second truss is then rotated. That and that 570 of the fixed leg assembly pivots about its connection 580. In this regard , the rolling gantry crane transverse truss assembly 220 is the source of the longitudinal truss. further oriented approximately perpendicular to the orientation of. Transverse truss assembly 220 the longitudinal truss to reorient it vertically with respect to the newly rotated longitudinal truss. Pendulum leg assembly 210 or fixed leg assembly 2 further from the forward end of 00 is transverse to opposing gantry crane leg assemblies with respect to the longitudinal truss ends. is moved vertically forward until it is adjacent to the direction. Stage 2 launching is shown in Figure 19a. 1 Longitudinal trusses 40 and 40a in position 1 shown in Figure 19b and Figure 3.90 bring about. At that point, the rolling gantry crane 50 is placed on the next succeeding pier "A". A support assembly 70 has been positioned. The longitudinal truss is then shown in Figure 19. b and rotated around that point to position 2 shown in Figure 19c.

Other truss rotational sequences also would have been possible according to the teachings herein.

The construction system described above undergoes a number of geometric deformations between horizontal assemblies. It should be noted that it is easy to accommodate. In this way, the bridge deck is different. The length of the pendulum leg assembly 210 may vary when the height direction is Keeping the gantry crane 50 horizontal or within a preferred transverse tilt range, it For example, it may be within a range of about +/-5'' from the horizontal. Extensions may be added to the pendulum leg as the height direction changes with respect to others. bridge When is not parallel to the horizontal, the pendulum leg is twisted with respect to the transverse truss assembly; Accommodates horizontal changes in horizontal spacing distance. Additionally, pendulum leg assembly 210 The pivoting connection between the pendulum leg assembly 220 and the transverse truss assembly 220 While allowing the assembly to pivot, the transverse truss assembly allows the user to remain transversely oriented. The horizontal writing space is flat in the height direction. If not, the gantry crane movement drive 940 moves each gantry crane leg. A digital processing unit (not shown) evaluates and compares the relative movement of the In order to control the flow of hydraulic fluid in each of its monitors through the control of Therefore, it is synchronized. Synchronization means that the vertical loads and longitudinal slopes of the two longitudinal trusses are Prevents one from moving faster than the other in different places. Longitudinal truss is non-height Or else the gantry crane truss is endowed to be parallel to the direction? The torsional support between the transverse truss assembly and the pendulum leg assembly also This can be alleviated by using similar connections.

Suitably, a construction system for producing precast segmental fishing bridges is shown. has been explained and explained. The foregoing description and accompanying illustrations are intended to be illustrative only. and the scope of the invention is defined solely by the appended claims and their equivalents. It is not intended to be limiting. Various modifications to the preferred embodiment and Modifications will be apparent to those skilled in the art. Such changes and modifications shall be subject to this publication. may be done without departing from the spirit and scope of the present invention. Therefore, all that Such changes and modifications are intended to be covered by the appended claims and their equivalents. is intended.

FIG.3 Special table Hei 5-509370 (12) FIG. 10 Flea and boat worker mutual master ten thousand summary The bridge construction system includes a first independent bridge section (2) positioned above the first bridge section (2). longitudinal truss (40) positioned above the second section (4). a second independent longitudinal truss (40a). Gantry crane (50) The gantry crane (50) is movably mounted on the truss (40, 40a). The first leg (210) attached to the first truss (40) and the second truss (40a) ), and the gantry crane (50) has a second leg (200) attached to the first and the second truss (40, 40a). gantry clay The gantry crane (940) drives the gantry crane (5) along the truss (40, 40a). 0) is provided for controllably driving. The transverse trolley (240) The trolley (240) is movably mounted on the entry crane (50), and the trolley (240) is generally transverse to the truss (40, 40a) to the gantry crane (50). can be driven along. The trolley (240) has longitudinal trusses (40, 40a) Lifting the bridge component to be positioned along the cross-section installed above; Includes a winch (260) for carrying. The trolley (240”) is installed in the bridge section ( 2, 4) can be selectively positioned above each of the above.

international search report , N+ PCT/US 91105318 International Search Report

Claims (1)

[Claims] 1. A bridge construction system comprising: a first independent longitudinal truss positioned above a first bridge span; a second independent longitudinal truss positioned above a second bridge span; , a gantry crane movably mounted on the truss, the gantry crane having a first leg mounted on the first truss and a gantry crane mounted on the second truss. and a gantry crane drive for controllably driving the gantry crane along the truss, the gantry crane being driveable along the first and second trusses; and a transverse trolley movably mounted on the gantry crane, the trolley being generally transverse to the traverse truss. The trolley can be driven along the gantry crane in a cutting direction, and the trolley is Hoisting for lifting and transporting bridge components to be positioned along the bridge span the trolley being selectively positionable above each of the bridge spans to attach the longitudinal truss to a bridge component disposed along the bridge span; and a connecting means for connecting the gantry crane to the vertical truss. a first compensating means for adapting said gantry crane to changes in the longitudinal spacing; and a second compensating means for adapting said gantry crane to changes in the slope of the longitudinal truss; Variations in horizontal spacing of trusses a third compensation means for adapting said gantry crane to a bridge construction system. 2. The Tachibana construction system of claim 1, further comprising means for selectively launching the longitudinal truss along a continuous portion of the bridge span. 3. The launching means longitudinally secures the gantry crane to the longitudinal truss attachment means and uses the gantry crane drive means to vertically move the truss. 3. The bridge construction system of claim 2, including means for driving in the direction. 4. 2. The bridge construction system of claim 1, wherein said longitudinal truss attachment means includes means for adjusting a longitudinal portion of said truss. 5. 5. The bridge construction system of claim 4, wherein said longitudinal truss mounting means includes roller means for supporting said longitudinal truss for rolling longitudinal movement. 6. The first leg of the gantry crane is fixedly attached to the gantry crane. The bridge construction system of claim 1, wherein the second leg of the gantry crane is pivotally mounted to the gantry crane. 7. A second leg of the gantry crane is connected to the gantry crane and the second longitudinal leg. The bridge construction according to claim 6, which is extendable to adjust the distance between the bridge construction and the truss. installation system. 8. The legs of the gantry crane are rotatably engaged with the longitudinal truss. The bridge construction system according to claim 2, comprising: a. 9. The legs of the gantry crane are mounted to pivot to the legs of the gantry crane. further comprising a launching frame attached to the truss, the launching frame having the longitudinal truss attachment means for longitudinally restraining the gantry crane during truss advancement. 9. The bridge construction system of claim 8, wherein the bridge construction system is engageable with a step. 10. 2. The bridge of claim 1, wherein said gantry crane drive means includes control means for selectively driving legs of said gantry crane in response to changes in slope difference between said first and second longitudinal trusses. construction system. 11. A construction system for assembling a multi-span bridge, the system comprising: longitudinal support means disposed spanwise above a pair of bridge spans having a completed portion and an unfinished portion; the means includes first and second longitudinal trusses, mounting means for mounting said traverse support means to a completed bridge section; and a bridge component movably mounted on said longitudinal support means. is transported in the span direction. a means for transporting a bridge component for installation, the transport means including means for lifting and longitudinally positioning the bridge component for attachment to the completed bridge section along the pair of bridge spans; , the wheel transport means comprises a first compensation means for adapting the transport means to changes in the vertical spacing of the longitudinal trusses, and a slope of the longitudinal trusses. second compensation means for adapting said transport means to changes in the alignment and said means for adapting said transport means to changes in the horizontal spacing of the longitudinal trusses; and a third compensation means for compensation. 12. 12. The bridge construction system of claim 11, wherein the first and second longitudinal trusses include upper and lower roller rails extending above the pair of bridge spans. 13. 12. The bridge construction system of claim 11, wherein the mounting means includes means for transversely positioning the longitudinal support means. 14. 12. The bridge construction system of claim 11, wherein said mounting means includes roller means for rollably supporting said longitudinal support means. 15. 12. The bridge construction system of claim 11, wherein the transport means includes means for rollably mounting the wheel transport means to the longitudinal support means. 16. The transport means drives the wheel transport means in the span direction above the longitudinal support means. 12. The bridge construction system of claim 11, comprising drive means for moving. 17. 17. The bridge construction system according to claim 16, wherein the drive means includes a differential means for differentially driving the transportation means depending on the height difference between the bridge spans. ! 8. 12. The bridge construction system of claim 11, wherein the vehicle includes an adjustable support frame structure. 19. The first compensation means also compensate for changes in the vertical spacing of the longitudinal trusses. 12. The bridge construction system of claim 11, including extendable means for maintaining said vehicle in constant engagement with said longitudinal support means. 20. Said second compensating means maintains the front despite changes in the slope of the longitudinal truss. a first pivotable joint for engaging said longitudinal support means to support said vehicle; 12. The bridge construction system of claim 11, including manual means. 21. Said third compensation means also compensate for changes in the horizontal spacing of the longitudinal trusses. 12. A bridge construction system as claimed in claim 11, including second pivotable coupling means for engaging and maintaining said vehicle without changing said vehicle. 22. a multi-span precast segmental bridge having at least two decks formed by joining a plurality of piers and a series of precast segments across the spans extending between successive piers; A method for constructing a first completed section of a bridge or roadway at one end of a first bridge span, the method comprising: one truss end and the next adjacent bridge at the other end of the first bridge span. placing a first longitudinal truss above the first bridge span to be mounted on the legs; a step to the end of the second completed section of the bridge or roadway at one end of the second bridge span; one truss end and the next adjacent bridge at the other end of the second bridge span. a step for placing a second longitudinal truss above the second bridge span to be mounted on the legs; rollingly mounting a rolling gantry crane on the first and second longitudinal trusses, the rolling gantry crane extending transversely between the longitudinal trusses and having a rolling gantry crane extending transversely between the longitudinal trusses; A transversely movable lifting trolley attached to The rolling gantry crane has a vertical spacing of the longitudinal truss. a first compensation measure for adapting the rolling gantry crane to changes in steps, and second compensation means for adapting said rolling gantry crane to changes in the slope of the longitudinal trusses, and changes in the horizontal spacing of the vertebral trusses. controllably driving the rolling gantry crane and the lifting trolley to adapt the rolling gantry crane to Grasp the recast bridge segment from the source region and place it on the first and second piers. and for sequential placement and installation on bridge components previously installed therein. The method further comprising the step of conveying a recorded bridge segment. 23. 5. The bridge segment is placed successively on a side of the pier facing the first and second bridge spans and on an opposite side of the pier facing the next successive bridge span. The method described in 22. 24. After completion of the first and second bridge spans and one-half of the next successive bridge span, the longitudinal truss is launched to extend above the next successive bridge span; 24. The method according to claim 23. 25. the longitudinal truss is supported at a first end thereof above the first and second piers, and the second end thereof extends from the first and second piers to the next successive bridge span; first launched to be supported upwardly, and then said second end of said longitudinal truss extends midway between a bridge span extending beyond said next successive pier; launching the longitudinal truss in a two-step sequence in which the longitudinal truss is launched such that the first end of the directional truss extends above an end of a completed portion of the Tachibana span; 25. The method according to claim 24. 26. Bridge components are added from said first and second piers to the next consecutive bridge span. 24. The method of claim 23, wherein a temporary support is placed under the longitudinal truss when the longitudinal truss is installed. 27. A bridge construction system comprising: a first longitudinal truss positioned above a first bridge span; and a second longitudinal truss positioned above a second bridge span; The longitudinal truss includes upper and lower roller bearing surfaces, and the system further includes a plurality of truss support assemblies attached to the completed bridge span section, the truss support assemblies secured to the completed bridge span section. crossing direction the longitudinal support beam; and a pair of roller assemblies mounted on the transverse support beam for rollably supporting the longitudinal truss above the bridge span; The stem further includes a gantry crane movably mounted on the truss, the gantry crane having a pair of transverse trusses extending between the longitudinal trusses, the transverse truss having an upper roller thereon. having a bearing surface; The entry crane can roll on the upper roller bearing surface of the transverse truss. further comprising a lifting trolley mounted on the bridge segment; the gantry crane includes a winch and a spreader beam attached to the winch for picking up and positioning the bridge members above a selected one of the bridge spans; a pivotable leg assembly rollably mounted on an upper bearing surface, the pivotable leg assembly being joined to the transverse truss by a ball joint connection, the system further comprising: mounted on the legs and along the longitudinal truss Bridge construction, further including a gantry crane drive for transporting the recrane longitudinally. installation system. 28. The legs of the gantry crane are connectable to the truss support assembly. a supporting frame is pivotally mounted thereon to connect the guide to the support assembly. a gantry crane is fixedly connected, and the longitudinal truss is driven by the gantry crane drive for launching the bridge construction system along the bridge span. 28. The bridge construction system of claim 27, wherein the bridge construction system allows 29. The gantry crane leg assembly is connected to the upper bearing of the longitudinal truss. 28. The bridge construction system of claim 27, wherein the bridge construction system is joined by a ball joint connection to a roller assembly that is rollably mounted on a sliding surface. 30. 30. The bridge construction system of claim 29, wherein the roller assembly includes upper and lower rollers for rollably restraining the gantry crane against vertical movement. 31. 28. The bridge construction system of claim 27, wherein the upper bearing surface of the longitudinal truss includes a longitudinally extending rack, and the gantry crane drive includes a pinion rollably engaging the rack. 32. 28. The bridge construction system of claim 27, wherein the truss support roller assembly includes a plurality of truss support rollers providing vertical support for the longitudinal truss. Mu. 33. The longitudinal truss includes upper and lower flanges, and the truss support rod 33. The bridge construction system of claim 32, wherein the roller assembly further includes a roller extending between the upper and lower longitudinal truss flanges to restrain the longitudinal truss against elevational displacement. 34. 34. The truss support roller assembly further includes a lateral roller that rollably engages a side surface of the lower longitudinal truss flange to restrain the longitudinal truss against transverse displacement. bridge construction system. 35. 28. The bridge construction system of claim 27, wherein the truss support assembly includes a transverse jack attached to the truss support roller assembly for transverse displacement of the longitudinal truss. 36. 28. The bridge construction system of claim 27, wherein the lifting trolley includes a pair of roller assemblies rollably mounted on an upper roller bearing surface of the transverse truss. 37. The lifting trolley is connected to the gantry crane, the trolley and the lift trolley. 38. The bridge construction system of claim 37, including an operator cab for controlling the inch interlock. 38. 28. The pivotable legs of the gantry crane are extendable. Bridge construction system. 39. 28. The bridge construction system of claim 27, wherein the fixed leg assembly includes a pair of upright supports, one of the supports having a pivot connection therein to accommodate torsion of the gantry frame.