CN103469724A - Steel bridge with controllably-deposited foundation system and construction method thereof - Google Patents
Steel bridge with controllably-deposited foundation system and construction method thereof Download PDFInfo
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- CN103469724A CN103469724A CN201210188610XA CN201210188610A CN103469724A CN 103469724 A CN103469724 A CN 103469724A CN 201210188610X A CN201210188610X A CN 201210188610XA CN 201210188610 A CN201210188610 A CN 201210188610A CN 103469724 A CN103469724 A CN 103469724A
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Abstract
The invention relates to a steel bridge with a controllably-deposited foundation system and a construction method thereof. The steel bridge with the controllably-deposited foundation system is provided with an M-shaped steel bridge pier, an anti-seismic foundation arranged at the bottom of the M-shaped steel bridge pier, an A-shaped steel bracket mounted on the M-shaped steel bridge pier, an H-shaped steel bridge panel, a concrete panel and a rail supporting platform; the concrete panel comprises a plurality of transverse steel bars, a plurality of w-shaped steel vertical steel bars, a steel bar net, a plurality of rail supporting platform steel bars and a concrete layer; lubricating oil is spread in a gap between a steel support and an outer sleeve, so that the connection of a back overlapped steel connecting bridge and the rapid hoisting of a large-span steel connecting bridge in a narrow space is realized.
Description
Technical field
The present invention relates to a kind of steel structure bridge and integral construction hoisting technology thereof, particularly a kind of steel structure bridge and job practices thereof of the foundational system with controlled sedimentation.
Background technology
Setting up of steel crossover generally all constructed with main building simultaneously or at the beginning of the main building design, planning just arranged, and exist after main building completes in Practical Project, in use or the later stage requirement of engineering with original building, be connected, now, the not reserved associated components be connected with the steel crossover on original building, with the difficult point place that being connected of existing building has just become to set up the steel crossover, connect the improper force mode that is subject to that can change existing building, cause structural safety hidden danger, the impact of steel crossover on existing building taken in method of attachment provided by the present invention after can effectively reducing, and play effective vibration isolation effect.Simultaneously general steel crossover is white heavy all larger, and its installation can adopt the methods such as Integral lifting, the loose spelling in high-altitude, segmentation lifting.The loose normal use of spelling long construction period, affecting original building in high-altitude; Segmental hoisting need to arrange two of higher bracing frames, and on-the-spot place must meet Standing position of a crane.For large span, the narrower steel crossover in white heavy larger construction plant, the present invention adopts at the ground integral assembling, and directly lifting can be shortened the engineering time, and does not affect the normal use of original building.
Summary of the invention
The steel structure bridge and the job practices thereof that the purpose of this invention is to provide a kind of foundational system with controlled sedimentation, take the technical problem that the steel crossover connects after solving; And solution realizes the problem of large-span steel connecting bridge fast hoisting at narrow space.For achieving the above object, the present invention adopts following technical scheme: a kind of steel structure bridge of the foundational system with controlled sedimentation comprises:
M shaped steel structure bridge pier;
Be arranged on the earthquake proof foundation of M shaped steel structure bridge pier bottom, described earthquake proof foundation comprises that described antidetonation abutment is comprised of E shaped steel structure soldier piles, K-type steel structure taper pile, T-steel pile cover basis, support beam, expansion bridge deck, steel concrete flexible damping wall, aseismatic joint, box-shaped retaining wall and expansion polystyrene plate; Bridge floor slab on the bridge span structure of bridge extends on abutment to form and enlarges bridge deck, and directly and the road slab formation road and bridge joint close that joins, jointless between abutment and bridge span structure; Soldier piles and taper pile support the pile cover basis of abutment, on the pile cover basis, direction across bridge is fixedly installed support beam, multiple tracks steel concrete flexible damping wall and box-shaped retaining wall successively, wherein, be provided with the abutment bearing between support beam and bridge span structure, between steel concrete flexible damping wall top and expansion bridge deck, just tie, fill expansion polystyrene plate between steel concrete flexible damping wall, between last one steel concrete flexible damping wall and box-shaped retaining wall, formed aseismatic joint;
The foundational system of one controlled sedimentation also is set between described earthquake proof foundation and M shaped steel structure bridge pier, comprises top board, described top board has the utricule that a deformably resilient material is made, and on described utricule, is connected with water pipe, and described water pipe is provided with valve; Be provided with pressure sensor and displacement transducer in described utricule, described pressure sensor is connected with control system with described displacement transducer, and described valve is controlled by control system;
Be arranged on the A shaped steel structure support of M shaped steel structure bridge pier;
H shaped steel bridge deck, extend longitudinally, H shaped steel bridge deck two ends be fixedly installed on respectively on M shaped steel structure bridge pier;
Concrete slab; And track, being arranged on described concrete slab, and being connected with described track reinforcing bar, described concrete slab is arranged between described steel bridge deck and described track;
Described concrete slab comprises: longitudinally be welded on described steel bridge deck, each F shape steel plate plate is longitudinally with a plurality of through holes, many transverse reinforcements;
Many w shaped steel longitudinal reinforcements, longitudinally be arranged on described these transverse reinforcements, vertical with described these transverse reinforcements;
Steel mesh reinforcement, be connected together and formed by many steel bar weldings, has net structure, and be connected with the drainage parts; Contactless between reinforcing bar, transverse reinforcement and longitudinal reinforcement;
Many track reinforcing bars, with described steel mesh reinforcement, weld together, and layer of concrete, moulding by casting is on described steel bridge deck, described steel mesh reinforcement and described these track reinforcing bars are arranged in the top of described layer of concrete, and transverse reinforcement and longitudinal reinforcement are arranged in the bottom of described layer of concrete;
Scribble lubrication oil in gap between steel support and outer sleeve.
Preferred version, described steel structure bridge, wherein, the distance that each through hole on each F shape steel plate plate is asked equates.
Preferred version, described steel structure bridge, wherein, described longitudinal reinforcement is arranged on described transverse reinforcement with the lateral separation of being scheduled to.
Preferred version, described steel structure bridge, wherein, described concrete slab is formed by Multi-section concrete panel connection segment, and the section length of described concrete slab is 18～30m.
Preferred version, described steel structure bridge, wherein, the gap between described concrete slab segmentation is sealed by a plurality of elastic sealing elements.
Preferred version, described steel structure bridge, wherein, described elastic sealing element is rubber pange filleting plate.
Preferred version, described steel structure bridge, wherein, described elastic sealing element is polysiloxane-based elastic sealant or gravity flow flat pattern bicomponent elastic fluid sealant.
Preferred version, described steel structure bridge, wherein, the length of described punched steel plate is identical with the length of described concrete slab segmentation.
A kind of steel structure method for bridge construction of the foundational system with controlled sedimentation, it is characterized in that: step is as follows:
Step 1, according to lifting weight and hoisting depth, select the model of crawler crane and mobile crane;
Step 2, erect-position position and lifting requirements according to crawler crane and mobile crane, to the walking road surface of crawler crane and mobile crane and the stand place mat thick sand of 100MM at least, to the erect-position position of crawler crane and mobile crane and the walking road surface checking of bearing capacity of crawler crane and mobile crane, guarantee can not damage original building simultaneously;
Step 3, according to the angle of weight, suspension centre quantity and the boom of steel crossover, select wire rope and otic placode, and check its safety;
Step 4, used crane that M shaped steel structure bridge pier is arranged on earthquake proof foundation, and use fastening devices that M shaped steel structure bridge pier and earthquake proof foundation are fixed up, and cat ladder is set up in the inner binding of the steel crossover that setup and use has welded in splicing between the two;
Step 5, according to the hoisting point position of calculative determination, at steel crossover design hoisting point position place welding otic placode, be connected by snap ring wire rope with otic placode;
Step 6, the steel crossover horizontal projection of take is installed control line as the steel crossover, and on ground, whole unwrapping wire, make the installation control line; And in original building, ground, new building, observation point is set;
Step 7, the steel crossover is had bad luck: crawler crane, before entering the main hoisting position, first lifts with mobile crane, the steel crossover is moved to installation site, until, after the distance of 12 meters of the centres of gyration of the center to center distance crawler crane of steel crossover, the steel crossover lands, crawler crane enters the main hoisting position, prepares lifting;
Step 8, the examination of steel crossover is hung; Crawler crane hoists suspension hook to steel crossover lowest part apart from ground 50 millimeters, stops lifting; Check the stress deformation of otic placode, lifting arm, check ground cracking and the situation of sinking under the crawler crane crawler belt; Guarantee that lifting arm is without falling object; Firmly knock wire rope with pipe, guarantee that each wire rope is stressed substantially even;
Step 9, formally lift the steel crossover; Check completely, suspension hook to the steel crossover lowest part that continues to hoist surpasses the basis, installation site, then by the rope of sauntering by the rotation of steel crossover, make the oblique space of asking into original building and new building that turns of steel crossover;
Step 10, winch to steel crossover revolution directly over the basis, installation site, and the suspension hook that slowly falls is upper to basis, and the centering orientation, look for verticality; By steel crossover installation in position;
Step 11, by extracing suspension hook and wire rope at the inner cat ladder of steel crossover in advance, and the site clearing instrument.A kind of large-span steel connecting bridge, for by upper chord, middle chord member, lower chord, the steel truss that steel column and connecting rod form, described connecting rod comprises horizontal brace rod and oblique connecting rod, it is characterized in that: steel crossover one end is connected by high-strength bolt with new building, the other end is connected with original building, two reinforced columns are installed in the original building both sides, between two reinforced columns of the bottom surface of steel crossover design and installation position, new girder steel is arranged, new girder steel is connected with the lower chord of steel crossover, lower chord is H shaped steel, the bottom flange of H shaped steel is connected with lead core rubber support by high-strength bolt, lead core rubber support is welded on new girder steel, on new girder steel, the adjacent two layers of floor position of original building respectively has a steel to support, central authorities' socket damper that steel supports, steel supports an end and is connected by the horizontal pin node with reinforced column, the other end is connected by the horizontal pin node with middle chord member or upper chord.
Described damper is lead damper, it is comprised of lead for retractable pencil, outer sleeve and end plate, end plate and steel supporting welding, the length of outer sleeve is greater than the length of lead for retractable pencil, the internal diameter of outer sleeve is greater than the external diameter that steel supports, and outer sleeve is enclosed within steel and supports outside, its middle-end and steel supporting welding, the other end supports and is not connected with steel, between steel support and outer sleeve, in gap, scribbles lubrication oil.
A kind of integral hoisting method step of large-span steel connecting bridge is as follows:
Step 1, according to lifting weight and hoisting depth, select the model of crawler crane and mobile crane.
Step 2, erect-position position and lifting requirements according to crawler crane and mobile crane, to the walking road surface of crawler crane and mobile crane and the stand place mat thick sand of 50mm at least, the walking road surface checking of bearing capacity simultaneously the erect-position position of crawler crane and mobile crane and crawler crane and car hung, guarantee can not damage original building.Step 3, according to the angle of weight, suspension centre quantity and the boom of steel crossover, select wire rope and otic placode, and check its safety.
Step 4, cat ladder is set up in the inner binding of the steel crossover welded in splicing.
Step 5, according to the hoisting point position of calculative determination, at steel crossover design hoisting point position place welding otic placode, be connected by snap ring wire rope with otic placode.
Step 6, the steel crossover horizontal projection of take is installed control line as the steel crossover, and on ground, whole unwrapping wire, make the installation control line; And in original building, ground, new building, observation point is set.
Step 7, the steel crossover is had bad luck: crawler crane, before entering the main hoisting position, first lifts with mobile crane, the steel crossover is moved to installation site, until, after the distance of 12 meters of the centres of gyration of the center to center distance crawler crane of steel crossover, the steel crossover lands, crawler crane enters the main hoisting position, prepares lifting.
Step 8, the examination of steel crossover is hung; Crawler crane hoists suspension hook to steel crossover lowest part apart from ground 50 millimeters, stops lifting; Check the stress deformation of otic placode, lifting arm, check ground cracking and the situation of sinking under the crawler crane crawler belt; Guarantee on lifting arm without falling object; Firmly knock wire rope with pipe, guarantee that each wire rope is stressed substantially even.Step 9, formally lift the steel crossover; Check completely, suspension hook to the steel crossover lowest part that continues to hoist surpasses the basis, installation site, then by the rope of sauntering by the rotation of steel crossover, make the oblique space of asking into original building and new building that turns of steel crossover.
Step 10, then winch to the revolution of steel crossover directly over the basis, installation site, and the suspension hook that slowly falls is upper to basis, and the centering orientation, look for verticality; By steel crossover installation in position.
Step 11, by extracing suspension hook and wire rope at the inner cat ladder of steel crossover in advance, and the site clearing instrument.
Otic placode described in step 3 is oblique otic placode and straight otic placode.
Described crawler crane is the 1r1400/2 crawler crane, and mobile crane is the 130t mobile crane.
Compared with prior art the present invention has following characteristics and beneficial effect:
At first, by the setting of shock isolating pedestal, realized setting up large-span steel connecting bridge between the original building of not reserving installation site and new building, taken the impact of steel crossover on existing building after can effectively reducing, and play effective vibration isolation effect; Secondly, the integral hoisting method of the steel crossover that the present invention mentions, by crawler crane and mobile crane, lift, realized magnanimous steel crossover integral hoisting, the difficulties such as construction plant restriction, underground structure complex limitation, integral hoisting space structures narrow limits in place have been overcome, can shorten the engineering time, and not affect the normal use of original building.The present invention has overcome conventional steel crossover and the force mode that is subject to that may change existing building being connected of main building, causes the shortcoming of structural safety hidden danger and the installation of steel crossover and adopts the loose normal use of spelling long construction period, affecting original building in high-altitude; Adopt segmental hoisting that two of higher bracing frames need to be set, and on-the-spot place must meet the shortcomings such as Standing position of a crane, solved and reduced the impact of setting up after the steel crossover existing building, and play effective vibration isolation effect, simultaneously by Integral Lifting Technology, overcome construction plant restriction, underground structure complex limitation, integral hoisting sky in place and asked the difficulties such as structure narrow limits.
The present invention can be widely used in setting up the construction of steel crossover between existing building and new building.
The specific embodiment
The steel structure bridge of the foundational system with controlled sedimentation of the present invention comprises: M shaped steel structure bridge pier; Be arranged on the earthquake proof foundation of M shaped steel structure bridge pier bottom, described earthquake proof foundation comprises that described antidetonation abutment is comprised of E shaped steel structure soldier piles, K-type steel structure taper pile, T-steel pile cover basis, support beam, expansion bridge deck, steel concrete flexible damping wall, aseismatic joint, box-shaped retaining wall and expansion polystyrene plate; Bridge floor slab on the bridge span structure of bridge extends on abutment to form and enlarges bridge deck, and directly and the road slab formation road and bridge joint close that joins, jointless between abutment and bridge span structure; Soldier piles and taper pile support the pile cover basis of abutment, on the pile cover basis, direction across bridge is fixedly installed support beam, multiple tracks steel concrete flexible damping wall and box-shaped retaining wall successively, wherein, be provided with the abutment bearing between support beam and bridge span structure, between steel concrete flexible damping wall top and expansion bridge deck, just tie, fill expansion polystyrene plate between steel concrete flexible damping wall, between last one steel concrete flexible damping wall and box-shaped retaining wall, formed aseismatic joint; The foundational system of one controlled sedimentation also is set between described earthquake proof foundation and M shaped steel structure bridge pier, comprises top board, described top board has the utricule that a deformably resilient material is made, and on described utricule, is connected with water pipe, and described water pipe is provided with valve; Be provided with pressure sensor and displacement transducer in described utricule, described pressure sensor is connected with control system with described displacement transducer, and described valve is controlled by control system; Be arranged on the A shaped steel structure support of M shaped steel structure bridge pier; H shaped steel bridge deck, extend longitudinally, H shaped steel bridge deck two ends be fixedly installed on respectively on M shaped steel structure bridge pier; Concrete slab; And track, being arranged on described concrete slab, and being connected with described track reinforcing bar, described concrete slab is arranged between described steel bridge deck and described track; Described concrete slab comprises: longitudinally be welded on described steel bridge deck, each F shape steel plate plate is longitudinally with a plurality of through holes, many transverse reinforcements; Many w shaped steel longitudinal reinforcements, longitudinally be arranged on described these transverse reinforcements, vertical with described these transverse reinforcements; Steel mesh reinforcement, be connected together and formed by many steel bar weldings, has net structure, and be connected with the drainage parts; Contactless between reinforcing bar, transverse reinforcement and longitudinal reinforcement; Many track reinforcing bars, with described steel mesh reinforcement, weld together, and layer of concrete, moulding by casting is on described steel bridge deck, described steel mesh reinforcement and described these track reinforcing bars are arranged in the top of described layer of concrete, and transverse reinforcement and longitudinal reinforcement are arranged in the bottom of described layer of concrete; Scribble lubrication oil in gap between steel support and outer sleeve.
Preferred version, described steel structure bridge, wherein, the distance that each through hole on each F shape steel plate plate is asked equates.
Preferred version, described steel structure bridge, wherein, described longitudinal reinforcement is arranged on described transverse reinforcement with the lateral separation of being scheduled to.
Preferred version, described steel structure bridge, wherein, described concrete slab is formed by Multi-section concrete panel connection segment, and the section length of described concrete slab is 18～30m.
Preferred version, described steel structure bridge, wherein, the gap between described concrete slab segmentation is sealed by a plurality of elastic sealing elements.
Preferred version, described steel structure bridge, wherein, described elastic sealing element is rubber pange filleting plate.
Preferred version, described steel structure bridge, wherein, described elastic sealing element is polysiloxane-based elastic sealant or gravity flow flat pattern bicomponent elastic fluid sealant.
Preferred version, described steel structure bridge, wherein, the length of described punched steel plate is identical with the length of described concrete slab segmentation.
A kind of steel structure method for bridge construction of the foundational system with controlled sedimentation, it is characterized in that: step is as follows:
Step 1, according to lifting weight and hoisting depth, select the model of crawler crane and mobile crane;
Step 2, erect-position position and lifting requirements according to crawler crane and mobile crane, to the walking road surface of crawler crane and mobile crane and the stand place mat thick sand of 100MM at least, to the erect-position position of crawler crane and mobile crane and the walking road surface checking of bearing capacity of crawler crane and mobile crane, guarantee can not damage original building simultaneously;
Step 3, according to the angle of weight, suspension centre quantity and the boom of steel crossover, select wire rope and otic placode, and check its safety;
Step 4, used crane that M shaped steel structure bridge pier is arranged on earthquake proof foundation, and use fastening devices that M shaped steel structure bridge pier and earthquake proof foundation are fixed up, and cat ladder is set up in the inner binding of the steel crossover that setup and use has welded in splicing between the two;
Step 5, according to the hoisting point position of calculative determination, at steel crossover design hoisting point position place welding otic placode, be connected by snap ring wire rope with otic placode;
Step 6, the steel crossover horizontal projection of take is installed control line as the steel crossover, and on ground, whole unwrapping wire, make the installation control line; And in original building, ground, new building, observation point is set;
Step 7, the steel crossover is had bad luck: crawler crane, before entering the main hoisting position, first lifts with mobile crane, the steel crossover is moved to installation site, until, after the distance of 12 meters of the centres of gyration of the center to center distance crawler crane of steel crossover, the steel crossover lands, crawler crane enters the main hoisting position, prepares lifting;
Step 8, the examination of steel crossover is hung; Crawler crane hoists suspension hook to steel crossover lowest part apart from ground 50 millimeters, stops lifting; Check the stress deformation of otic placode, lifting arm, check ground cracking and the situation of sinking under the crawler crane crawler belt; Guarantee that lifting arm is without falling object; Firmly knock wire rope with pipe, guarantee that each wire rope is stressed substantially even;
Step 9, formally lift the steel crossover; Check completely, suspension hook to the steel crossover lowest part that continues to hoist surpasses the basis, installation site, then by the rope of sauntering by the rotation of steel crossover, make the oblique space of asking into original building and new building that turns of steel crossover;
Step 10, winch to steel crossover revolution directly over the basis, installation site, and the suspension hook that slowly falls is upper to basis, and the centering orientation, look for verticality; By steel crossover installation in position;
Step 11, by extracing suspension hook and wire rope at the inner cat ladder of steel crossover in advance, and the site clearing instrument.
Embodiment, described large-span steel connecting bridge, for by upper chord, middle chord member, lower chord, the steel truss that steel column and connecting rod form, described connecting rod comprises level connection joint and oblique connecting rod, steel crossover one end is connected by high-strength bolt with new building, the other end is connected with original building, two reinforced columns 9 are installed in the original building both sides, between two reinforced columns of the bottom surface of steel crossover design and installation position, new girder steel is arranged, new girder steel is connected with the lower chord 3 of steel crossover, lower chord 3 is H shaped steel, the bottom flange of H shaped steel is connected with lead core rubber support 7 by high-strength bolt 6, lead core rubber support 7 is welded on new girder steel, on new girder steel, the adjacent two layers of floor position of original building respectively has a steel to support, central authorities' socket damper that steel supports, steel supports an end and is connected by the horizontal pin node with reinforced column 9, the other end is connected by the horizontal pin node with middle chord member 2 or upper chord 1.Described damper is lead damper, it is comprised of lead for retractable pencil, outer sleeve and end plate, end plate and steel supporting welding, the length of outer sleeve is greater than the length of lead for retractable pencil, the internal diameter of outer sleeve is greater than the external diameter that steel supports, and outer sleeve is enclosed within steel and supports above, wherein an end and steel supporting welding, the other end supports and is not connected with steel, between steel support and outer sleeve, in gap, scribbles lubrication oil.The integral hoisting method of described large-span steel connecting bridge, its step is as follows:
Step 1, according to lifting weight and hoisting depth, select the model of crawler crane and mobile crane.
The about 122t of steel crossover lifting own wt, floor support plate 3.1t, chord member peg 0.15t, the Curtainwall connector 37t that needs welding, impost except crossover own wt 3.1+0.15+3.7--6.95 (t) following table member is altogether installed after the crossover lifting: steel crossover lifting gross weight=122+6.95--2.15:126.8 (t) considers hoist cable suspender etc., crossover lifting gross weight is calculated with 130t, crossover installation site 40.88m, and the ground relative elevation is less than a 2m.By a 2m, consider, hoisting depth is 43m.Main hoisting crawler crane machinery is selected 1r 1400/2 crawler crane, and mobile jib selects 63m long, during radius of gyration 10m, and biggest lifting capacity 175t, maximum lifting height 59m; During radius of gyration 12m, biggest lifting capacity 139t, maximum lifting height 57m; Therefore, the 1r1400/2 crawler crane meets the lifting needs of steel crossover.
Step 2, erect-position position and lifting requirements according to crawler crane and mobile crane, to the walking road surface of crawler crane and mobile crane and the stand place mat thick sand of 50mm at least, to the erect-position position of crawler crane and mobile crane and the walking road surface checking of bearing capacity of crawler crane and mobile crane, guarantee can not damage original building simultaneously.
Through the site investigation investigation to the lifting place, near 12m place, the second stage of M axis left side, there is a white runway to lead directly to basement, under white runway, be a L-type basement independently, white runway is the thick situ Concrete Slabs of 300ram, and basement retaining wall is the thick reinforced concrete wall of 500mm.There is no the potential safety hazards such as pipe trench, aqueduct in crane bearing stratum scope, high altitude environment clear around crane lifting, can be lifted.
When lifting operation, every crawler belt underlay Wu Kuai road case substrate of crane, road case substrate size is 2.3m * 5m, under crawler belt, foundation bearing capacity calculates: crane adds counterweight gross weight 380t, the heavy 130t of equipment, gross weight is about 510t.I0 piece case substrate size: the wide 2.3m of long 5mX.Gross area 115m2.During the operation of 1r1400/2 crawler belt, to ground pressure, according to Liebherr's work plan software demonstration, lifting is during overline bridge, lift heavy 130t, and principal arm and crawler belt are 45.During angle, the maximum bearing pressure of this axle is 161t,
Step 3, according to the angle of weight, suspension centre quantity and the boom of steel crossover, select wire rope and otic placode, and check its safety.
Select wire rope: shown in result of calculation, structural stress is 38MPa to the maximum; Vertical displacement is 9.2mm to the maximum; Horizontal direction length travel accumulative total is 0.99mm to the maximum, and three numerical value all do not impact installing.The lifting rope is selected 6 * 37 wire rope, and in restrict long 12m, diameter, 52mm (double joint), nominal tensile strength are 1700N/mm2.
Lifting gross weight: 130t
4 colligations, every some hoist cable load-bearing: 130 ÷ 4 ÷ sin60=37.53 (t)
Because hoist cable adopts two, and every is all taked double joint, every load-bearing: 37.53 ÷ 2=18.77 (t)
52mm wire rope pulling force allowable in 6 * 37+1-1700:
Rupture pull force summation * nonuniformity coefficient ÷ safety factor=170.5 * 0.82 ÷ 7=19.98 (t)
1998>18.88 thus 6 * 37+1-1700 in the 52mm wire rope can meet lifting requirements.
Select otic placode: press the heavy 130t calculating in vain of steel crossover, adopt 4 colligations, select S-BX55 type snap ring, snap ring lateral pin diameter is 70mm, and the otic placode bore diameter goes out 80mm, and otic placode is selected the thick Q3458 steel plate of 30mm, and design yield strength is 325N/mm2, with
90% is taken as 325x0.9=292.5 (N/ram2)
The snap ring lateral pin contacts with otic placode by 1/3 lateral pin diameter and gets, and contact area is:
The stressed 38t that presses of 70 ÷ 3 * 30=700 (mm2) single-points calculates, the contact area desired value:
380000 ÷ 292.5=1299.15 (mm2) so lug plate holes need reinforcing ring thickness:
(1299.15-700) ÷ (70 ÷ 3)=25.7 (film) are according to above-mentioned calculating, and reinforcing ring is determined the two-sided reinforcement of the employing thick Q3458 steel plate of 12mm.
Hanger hole and otic placode border width, with shear force calculation, design shearing allowable and calculate with 175N/mm2, and this width is: 350000 ÷ 2 ÷ 175 ÷ 30=33.33 (film)
According to the size of selected snap ring and lifting wire rope, lug plate holes and otic placode border width permissible value are 200mm, and therefore selecting this width is 100mm, and the reinforcing ring width is 80mm.
Step 4, cat ladder is set up in the inner binding of the steel crossover welded in splicing.
Step 5, according to the hoisting point position of calculative determination, at steel crossover design hoisting point position place welding otic placode, be connected by snap ring wire rope with otic placode.
Step 6, the steel crossover horizontal projection of take is installed control line as the steel crossover, and on ground, whole unwrapping wire, make the installation control line; And in original building, ground, new building, observation point is set.
Step 7, the steel crossover is had bad luck: crawler crane, before entering the main hoisting position, first lifts with mobile crane, the steel crossover is moved to installation site, until, after the distance of 12 meters of the centres of gyration of the center to center distance crawler crane of steel crossover, the steel crossover lands, crawler crane enters the main hoisting position, prepares lifting.
Step 8, the examination of steel crossover is hung; Crawler crane hoists suspension hook to steel crossover lowest part apart from ground 50 millimeters, stops lifting; Check the stress deformation of otic placode, lifting arm, check ground cracking and the situation of sinking under the crawler crane crawler belt; Guarantee on lifting arm without falling object; Firmly knock wire rope with pipe, guarantee that each wire rope is stressed substantially even.
Step 9, formally lift the steel crossover; Check completely, suspension hook to the steel crossover lowest part that continues to hoist surpasses the basis, installation site, then by the rope of sauntering by the rotation of steel crossover, make the oblique space of asking into original building and new building that turns of steel crossover.
Step 10, winch to steel crossover revolution directly over the basis, installation site, and the suspension hook that slowly falls is upper to basis, and the centering orientation, look for verticality; By steel crossover installation in position.
Step 11, by extracing suspension hook and wire rope at the inner cat ladder of steel crossover in advance, and the site clearing instrument.Otic placode described in step 3 is oblique otic placode and straight otic placode.
Described crawler crane is the 1r1400/2 crawler crane, and mobile crane is the 130t mobile crane.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection of claims of the present invention.
Claims (10)
1. the structure of the steel with the foundational system of a controlled sedimentation bridge, is characterized in that, comprising:
M shaped steel structure bridge pier;
Be arranged on the earthquake proof foundation of M shaped steel structure bridge pier bottom, described earthquake proof foundation comprises that described antidetonation abutment is comprised of E shaped steel structure soldier piles, K-type steel structure taper pile, T-steel pile cover basis, support beam, expansion bridge deck, steel concrete flexible damping wall, aseismatic joint, box-shaped retaining wall and expansion polystyrene plate; Bridge floor slab on the bridge span structure of bridge extends on abutment to form and enlarges bridge deck, and directly and the road slab formation road and bridge joint close that joins, jointless between abutment and bridge span structure; Soldier piles and taper pile support the pile cover basis of abutment, on the pile cover basis, direction across bridge is fixedly installed support beam, multiple tracks steel concrete flexible damping wall and box-shaped retaining wall successively, wherein, be provided with the abutment bearing between support beam and bridge span structure, between steel concrete flexible damping wall top and expansion bridge deck, just tie, fill expansion polystyrene plate between steel concrete flexible damping wall, between last one steel concrete flexible damping wall and box-shaped retaining wall, formed aseismatic joint;
The foundational system of one controlled sedimentation also is set between described earthquake proof foundation and M shaped steel structure bridge pier, comprises top board, described top board has the utricule that a deformably resilient material is made, and on described utricule, is connected with water pipe, and described water pipe is provided with valve; Be provided with pressure sensor and displacement transducer in described utricule, described pressure sensor is connected with control system with described displacement transducer, and described valve is controlled by control system;
Be arranged on the A shaped steel structure support of M shaped steel structure bridge pier;
H shaped steel bridge deck, extend longitudinally, H shaped steel bridge deck two ends be fixedly installed on respectively on M shaped steel structure bridge pier;
Concrete slab; And track, being arranged on described concrete slab, and being connected with described track reinforcing bar, described concrete slab is arranged between described steel bridge deck and described track;
Described concrete slab comprises: longitudinally be welded on described steel bridge deck, respectively wear the F shape steel plate longitudinally with a plurality of through holes, many transverse reinforcements;
Many w shaped steel longitudinal reinforcements, longitudinally be arranged on described these transverse reinforcements, vertical with described these transverse reinforcements;
Steel mesh reinforcement, be connected together and formed by many steel bar weldings, has net structure, and be connected with the drainage parts; Contactless between reinforcing bar, transverse reinforcement and longitudinal reinforcement;
Many track reinforcing bars, with described steel mesh reinforcement, weld together, and layer of concrete, moulding by casting is on described steel bridge deck, described steel mesh reinforcement and described these track reinforcing bars are arranged in the top of described layer of concrete, and transverse reinforcement and longitudinal reinforcement are arranged in the bottom of described layer of concrete;
Scribble lubrication oil in gap between steel support and outer sleeve.
2. steel structure bridge as claimed in claim 1, wherein, the distance that each through hole on each F shape steel plate plate is asked equates.
3. steel structure bridge as claimed in claim 1, wherein, described longitudinal reinforcement is arranged on described transverse reinforcement with the lateral separation of being scheduled to.
4. steel structure bridge as claimed in claim 1, wherein, described concrete slab is formed by Multi-section concrete panel connection segment, and the section length of described concrete slab is 18～30m.
5. steel structure bridge as claimed in claim 4, wherein, the gap between described concrete slab segmentation is sealed by a plurality of elastic sealing elements.
6. steel structure bridge as claimed in claim 5, wherein, described elastic sealing element is rubber pange filleting plate.
7. steel structure bridge as claimed in claim 5, wherein, described elastic sealing element is polysiloxane-based elastic sealant or gravity flow flat pattern bicomponent elastic fluid sealant.
8. steel structure bridge as claimed in claim 4, wherein, the length of described punched steel plate is identical with the length of described concrete slab segmentation.
9. steel structure bridge as claimed in claim 1 wherein, arranges road surface low-noise micro-surfacing functional layer on concrete slab; Road surface low-noise micro-surfacing functional layer comprise road surface low-noise micro-surfacing functional layer that making thickness is 1～5MM be by gathering materials 50%, rubber powder 1～8%, the cation-modified mulseal 5～11% of SBR, cement 1～8%, auxiliary agent 0.9～1.8%, water 1～5%, polythene PE: 20-70%, polyester PES:0.9-10%, polypropylene PP15-60%, polyvinylchloride: 20-50%, chlorinated polypropylene PP-C:5-10%, rubber: 3-5%, pitch 1-6%, cellulose: the raw material of 1-4.5 auxiliary agent 0.1-0.5% weight portion proportioning forms.
10. the steel structure method for bridge construction of a kind of foundational system with controlled sedimentation as claimed in claim 1, it is characterized in that: step is as follows:
Step 1, according to lifting weight and hoisting depth, select the model of crawler crane and mobile crane;
Step 2, erect-position position and lifting requirements according to crawler crane and mobile crane, to the walking road surface of crawler crane and mobile crane and the stand place mat thick sand of 100MM at least, to the erect-position position of crawler crane and mobile crane and the walking road surface checking of bearing capacity of crawler crane and mobile crane, guarantee can not damage original building simultaneously;
Step 3, according to the angle of weight, suspension centre quantity and the boom of steel crossover, select wire rope and otic placode, and check its safety;
Step 4, used crane that M shaped steel structure bridge pier is arranged on earthquake proof foundation, and use fastening devices that M shaped steel structure bridge pier and earthquake proof foundation are fixed up, and cat ladder is set up in the inner binding of the steel crossover that setup and use has welded in splicing between the two;
Step 5, according to the hoisting point position of calculative determination, at steel crossover design hoisting point position place welding otic placode, be connected by snap ring wire rope with otic placode;
Step 6, the steel crossover horizontal projection of take is installed control line as the steel crossover, and on ground, whole unwrapping wire, make the installation control line; And in original building, ground, new building, observation point is set;
Step 7, the steel crossover is had bad luck: crawler crane, before entering the main hoisting position, first lifts with mobile crane, the steel crossover is moved to installation site, until, after the distance of 12 meters of the centres of gyration of the center to center distance crawler crane of steel crossover, the steel crossover lands, crawler crane enters the main hoisting position, prepares lifting;
Step 8, the examination of steel crossover is hung; Crawler crane hoists suspension hook to steel crossover lowest part apart from ground 50 millimeters, stops lifting; Check the stress deformation of otic placode, lifting arm, check ground cracking and the situation of sinking under the crawler crane crawler belt; Guarantee that lifting arm is without falling object; Firmly knock wire rope with pipe, guarantee that each wire rope is stressed substantially even;
Step 9, formally lift the steel crossover; Check completely, suspension hook to the steel crossover lowest part that continues to hoist surpasses the basis, installation site, then by the rope of sauntering by the rotation of steel crossover, make the oblique space of asking into original building and new building that turns of steel crossover;
Step 10, winch to steel crossover revolution directly over the basis, installation site, and the suspension hook that slowly falls is upper to basis, and the centering orientation, look for verticality; By steel crossover installation in position;
Step 11, by extracing suspension hook and wire rope at the inner cat ladder of steel crossover in advance;
Step 12; After the concrete slab of whole bridge installs, lay road surface low-noise micro-surfacing functional layer on whole concrete slab, 48 little rear site clearing instruments after low-noise micro-surfacing functional layer.
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