The method of reconstruction of the old bridge
The invention relates to the field of bridge construction. The method of reconstruction of the old bridge includes the construction of a new wider bridge along the longitudinal axis of the old bridge without destroying the latter with a gap relative to it and transfer the movement to the new bridge. What's new is thatduring the reconstruction of the old bridge, having historical or memorial value, the new bridge erected with a gap, at least on the deflection of the superstructure of the new bridge, but not less than 0.7 m longer than the old bridge, with full unloading of the old bridge, with the support of the new bridge erected outside the old bridge or between the retaining walls of the supports of the old bridge, and the superstructure of the new bridge perform braced, or guyed, or hanging, or arched. The technical result of the invention consists in the construction of the new bridge in place of the old, have historic value of the bridge without destroying the latter, the use of the existing direction of the street or road right-of-way, reducing labor and materialsfrom. 4 Il.The invention relates to a bridge and can be used in the reconstruction of existing streets or roads in a whole is on demolition (destruction).Known methods of reconstruction of old, including the memorial of historical value bridge in Moscow. For example, “...when the expansion of the river Yauza and the device through passages along its embankments,...” among the reconstructed bridges, two were saved semicircular vaults: Palace (1781) and zolotorogskii (1865). Reconstruction of the Palace bridge was the widening of the roadway from 15.5 to 23.5 m m by the device consoles. Survived also by five arches 8,5 m brick Zolotorojski bridge had three spans by 12.8 meters conversion... except rehabilitation of the old brickwork drainage, river... made two flights (instead of one), and riverside travel has built a new, but not next to the third, and beyond shore abutment. This was achieved straightening passage, savings on disassembly of the abutment and the preservation of the historic bridge (C. M. nadiin. The architecture of the bridges. Moscow, Stroyizdat. Popular science library student. 1989, pages 49-50).The disadvantages of the known methods is the inability of their application for remoteipheader (especially the old, with the subsidence of the foundations of bridges, because they are based on the introduction of elements of “broadening” in the old, but shramet subjected to forced demolition, disassembly, leading to the loss of the historical (memorial) of the monument, which, as a rule, he is.The closest to the essence and the achieved technical result is a method of reconstruction of the old bridge, which includes the construction of a new wider bridge along the longitudinal axis of the old bridge without destroying the latter with a gap relative to him and translation movements on the new bridge (see, for example, SU 1551767, 23.03.1990, E 01 D 21/00).The disadvantages of analogue (prototype) are nerushimosti problems of preservation of the old, remoteipheader bridge, with historic (memorial) value, the loss of the monument's history, causing aesthetic damage to the city or the surrounding landscape, as the old bridge is served by the new constructions of the type “opaque” sarcophagus becomes unavailable for viewing.The technical result is the construction of a new bridge in place of the old, historic (memorial) the value of the bridge without destroying the (forced disassembly) last, using the existing direction of the street or right-of-way of the road, the reduction of budgetary funds, time and effort to dismantle the old bridge and the development of new trails, preservation of the monument Isho business.This technical result is achieved due to the fact, in the way of reconstruction of the old bridge, which includes the construction of a new wider bridge along the longitudinal axis of the old bridge without destroying the latter with a gap relative to it and transfer the movement to the new bridge, according to the invention during the reconstruction of the old bridge, having historical or memorial value, the new bridge erected with a gap, at least on the deflection of the superstructure of the new bridge, but not less than 0.7 m longer than the old bridge, with full unloading old bridge, with the support of the new bridge erected outside the old bridge or between the retaining walls of the supports of the old bridge, and the superstructure of the new bridge perform braced, or guyed, or hanging, or arched.The application of the proposed method of reconstruction of the old bridge allows you to save the direction of the street or right-of-way of existing roads, construction of a new bridge in the same place, keep the old one and cut the budget on clearing space for new construction, including the use of the old bridge as scaffolding, to prevent aesthetic damage to the city or the surrounding landscape, to preserve the historical monument, the soda is but the implementation of the proposed method on the example of the small bridge, length up to 25 meters of the Facade.In Fig.2 is a cross-section 1-1 in Fig.1;In Fig.3 - implementation of the proposed method on the example of a large, longer than 25 m bridge. The facade.In Fig.4 a cross-section 1-1 in Fig.3.In both examples, the old bridge, which has one or several, mostly, vaulted spans 1, stone or clinker masonry Cabinet or retaining walls 2, 3 cones, approach embankments, a new bridge, consisting of foundations (piles) 4, with the nozzles 5, constructed outside of the path of the old bridge in the plan, and the superstructure, for example, beam 6 or 7 hanging design must have at least one flight that is equal to or greater than the length of the old bridge, to exclude not only support, but the touch of the latter, in this dimension of Gnnew increases against the Gwiththe old bridge at the required value.The method of reconstruction of the old bridge as follows.The choice of design of the new bridge should be preceded by a thorough examination of the old bridge 1. The construction of a new wider bridge perform on the longitudinal axis of the old bridge 1 without destroying the latter with a gap relative to it. Translate the movement to the new bridge. When reconstruction for the full design, single-span 4, 5, 6, with a gap, at least on the deflection of the superstructure of the new bridge, but not less than 0.7 m longer than the old bridge 1, with full unloading old bridge 1. While the superstructure of the new bridge perform beam 6, or suspension, or a suspension of 7, or arched. Supports 4 new bridge submersible drilling method, erected outside the old bridge 1 or between the retaining walls 2 poles 4 old bridge 1. The nozzles 5 are elongated, consoles, speakers dimensions of an old bridge 2 to the desired value. The erection of the girders of the superstructure 6 is mobile cranes, usually from the ground, scaffolding or embankment approaches 3, and if not possible, give preference to monolithic structures or light modular metal products, for example, hanging 7 system. All other work - her mound approaches 3, the device of the roadway and road bridge fencing is manufactured in the usual manner, on the basis of the target technology. Provide wastewater beyond the old 1 bridge.The application of the proposed method will allow you to build a new bridge and to prevent the forced destruction (demolition) old bridge 1, 2, will retain the acceptance of buildings 4, 5, 6 and 7 in General, to avoid additional costs for demolition of the old bridge 1 and 2 and use the direction of the street or right-of-way of existing roads.
ClaimsThe method of reconstruction of the old bridge, which includes the construction of a new wider bridge along the longitudinal axis of the old bridge without destroying the latter with a gap relative to it and transfer the movement to the new bridge, characterized in that theduring the reconstruction of the old bridge, having historical or memorial value, the new bridge erected with a gap, at least on the deflection of the superstructure of the new bridge, but not less than 0.7 m longer than the old bridge, with full unloading of the old bridge, with the support of the new bridge erected outside the old bridge or between the retaining walls of the supports of the old bridge, and the superstructure of the new bridge perform braced, or guyed, or hanging, or arched.
FIELD: bridge building, particularly for building motorway bridges and pedestrian overpasses, mainly of wood and metal.
SUBSTANCE: span structure has wooden deck having thickness changeable along span length. The greatest thickness is in span center part and the lesser one is at span edges. Deck forms extensions inclined to transversal deck axis and transversal pre-tensioned reinforcement located inside deck, supporting subdiagonals located under deck and arranged coaxial to longitudinal deck edges. Rigid inclined transversal tie system formed at each deck end part consists of upper and lower belts, struts and post. Upper belt of each tie system rests upon corresponding inclined deck extension, lower belt thereof is pivotally connected to subdiagonals by ends thereof. Post extends in tie system plane along line laying in vertical longitudinal axial deck plane and rigidly secured to tie system belts by ends thereof. Struts are connected by their ends to lower belt and to lower post end and rigidly secured to corresponding end parts of upper belt by another ends thereof. Deck thickness in span is 1.6 - 1.9 deck thickness at deck ends.
EFFECT: increased load-bearing capacity of span structure, its flexural rigidity and torsional rigidity in transversal direction.
2 cl, 2 dwg
FIELD: building and reconstruction of artificial structures, particularly bridge and elevated road reinforcement.
SUBSTANCE: device includes a bundle of ropes, rope deflection means with posts and supports with anchoring rope clamps. Each rope deflector is provided with slide bearing made as bush connected with guiding post and with rope bundle.
EFFECT: improved operational reliability and reduced cost of bridge maintenance.
2 cl, 3 dwg
FIELD: building, particularly for bridge reconstruction along with reinforcing and widening thereof.
SUBSTANCE: reinforced concrete bridge comprises posts having support diaphragms and cross-bars having box-like cross-sections with longitudinal multi-strand prestressed reinforcement members secured by ends thereof to corresponding ends of cross-bars and supported by them through intermediate piers. Installed in cross-bar cavities near ends thereof between upper and lower shoulders of cross-bars is at least one additional wall extending along bridge axis. Longitudinal prestressed reinforcing members are secured to additional walls by their ends. Each additional wall is connected to upper and lower shoulders of cross-bar through prestressed members located near end surfaces thereof. Intermediate piers are arranged above support diaphragms of posts inside box-like cross-bar.
EFFECT: increased load-bearing capacity and traffic capacity, increased residual bridge life by depreciation and obsolescence criteria.
2 cl, 3 dwg
FIELD: bridge building.
SUBSTANCE: proposed method of replacement of bridge framework includes mounting of existing bridge framework to be demounted onto floating supports with subsequent disassembling of frame using at least one traveling load-lifting crane, loading of disassembled of framework on watercraft, carrying them to bank and mounting of new bridge framework. Novelty is that cross shifting of framework to be demounted is done, new bridge framework is mounted, two floating supports are brought under bridge framework to be demounted and as bridge framework members are being demounted, each floating support at side of demounted section after demounting of said section is moved along demountable bridge framework and is set behind second floating support. Demounting of sections of existing framework is done from top to bottom by cutting out linear members of upper belt, then posts, hangers, braces and then members of lower belt.
EFFECT: improved reliability, reduced expenses, labor input and time taken for replacement of bridge framework owing to demounting of bridge framework from one side with use of movable floating supports for resting of bridge framework to be demounted.
5cl, 6 dwg
FIELD: building, particularly bridges with reinforcement and widening.
SUBSTANCE: frame bridge comprises posts with support diaphragms and cross-bars of box-like cross-section having longitudinal pre-stressed reinforcement members connected to cross-bar ends by end parts thereof and supported by cross-bars by means of intermediate supports. Each intermediate support is formed of fixed panel-like part joined with outer face of cross-bar wall and with lower face of concreted console of roadway cross-bar part panel. Movable parts of intermediate supports are separate for each branch of longitudinal pre-stressed reinforcement member passing into curvilinear thick-walled tube reinforced with longitudinal rib to which upper end of pre-stressed drawbar is connected. Lower drawbar end is releasably attached to lower face of fixed panel-like part. Longitudinal reinforcement members are located under concreted consoles of roadway part panel and are inserted in channels made in bosses of concreted roadway part cross-bar panel console and secured to corresponding cross-bar ends by anchors and to intermediate supports.
EFFECT: increased load-bearing capacity and throughput; increased residual bridge life according to deterioration and ageing criteria.
FIELD: methods or apparatus for repairing or strengthening existing bridges.
SUBSTANCE: method involves fastening the first ends of main coal-plastic plates to beam ends; stressing the main coal-plastic plates by moving the second ends thereof towards beam center; gluing the stressed coal-plastic plates to above beam; gluing additional coal-plastic plate to the beam after stress application to beam center with the use of anchoring boxwoods, which are pulled one towards another, and after glue strength development up to design strength. Additional coal-plastic plate is arranged above main ones so that additional plate covers gap between main plates and ends of above plates at beam center. After hardening of glue located under additional plate anchoring boxwoods are released and demounted.
EFFECT: increased operational reliability and improved bridge appearance.
2 cl, 1 dwg
FIELD: building, particularly artificial structure construction and repair, namely reinforcement devices for composite bridge structures.
SUBSTANCE: device includes strand bundles, rests, anchoring members and fastening pins to connect the rests to beam. The device comprises additional rest having plate, which cooperates with end beam part and pre-stressed control rods fastened to plate and pins correspondingly.
EFFECT: increased load-bearing capacity and reliability of the bridge, reduced costs of bridge maintenance.
FIELD: bridge building, particularly bridge reconstruction.
SUBSTANCE: method according to the first embodiment involves erecting additional support members in proximal vicinity to existent bridge pier; demounting beam span structure during traffic interruption period; mounting new span structure supported by additional support members. The additional support members are made as posts constructed from both span structure sides out of the bounds of the existent bridge. After that composite or monolithic girth rail is erected on the post and cabinet-type blocks are installed upon the girth rail. Cabinet-type block wings abut the piers. Newly-built short span structures are mounted so that the span structures rest upon the girth rails. Method according to the second embodiment involves removing embankment ground outside bridge piers and erecting posts with composite or monolithic girth rails out of the width of the existent bridge; removing span structures; disassembling the existent piers and installing cabinet-type blocks on the girth rails; erecting new elongated span structures supported by girth rails of the posts. Method according to the third embodiment involves forming additional support members made as posts erected from span structure side out of the bounds of existent bridge; mounting composite or monolithic girth rail on each post; mounting new span structures having lengths equal to that of demounted ones and supported by the posts, wherein cantilevered parts of the span structures abut walls of existent piers by ends thereof.
EFFECT: increased technological effectiveness and reduced time of bridge reconstruction.
6 cl, 8 dwg
FIELD: bridge building, particularly to reconstruct and reinforce little bridges and pipes in active railroad and motor roads.
SUBSTANCE: method involves installing removable form inside bridge opening to create reinforcement structure having shape close to bridge opening shape and filling gaps between removable form and bridge pier with concrete mix and reinforcement to form new span structure. Foundation, namely concrete base is arranged, then space between existent piers and form is filled with concrete mix to create reinforcement structure having walls integrally connected with existent piers by tie members, for instance by anchoring rods. Air gap is created between existent span structure and top of new span structure to provide free deflection of existent span structure. After strength development in concrete mix old span structure is disassembled and new road pavement is formed so that the road pavement is supported by new span structure.
EFFECT: possibility of normal bridge usage during bridge reconstruction, reduced material consumption and provision of maximal throat area of bridge opening.
3 cl, 1 dwg, 1 ex
FIELD: construction, particularly artificial structure, preferably reinforced concrete bridge, repair.
SUBSTANCE: repair method involves connecting lower belts of adjacent beams with metal sheets; securing the metal sheets to the beams by means of bolts; installing covering plates in spaces between adjacent beams so that the covering plates may be connected with beam walls; laying new concrete panel on the structure; providing development of new panel concrete strength; releasing metal sheets from beams by unscrewing the bolts; removing the covering plates; forming new paving; applying load equal to 0.25-0.35 of temporary load to each beam; securing metal sheets to beams to provide design load withstanding. The load is symmetric with respect to transversal plane of metal sheet symmetry. The panel is formed of fiber reinforced concrete.
EFFECT: increased simplicity and decreased operational costs, as well as reduced concrete panel deformation.
3 cl, 5 dwg