CN107201726A - The all welded steel structured bridge of section assembling eliminates the construction method of residual stress - Google Patents
The all welded steel structured bridge of section assembling eliminates the construction method of residual stress Download PDFInfo
- Publication number
- CN107201726A CN107201726A CN201710427878.7A CN201710427878A CN107201726A CN 107201726 A CN107201726 A CN 107201726A CN 201710427878 A CN201710427878 A CN 201710427878A CN 107201726 A CN107201726 A CN 107201726A
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- section
- cable
- hoist cable
- truss
- interim
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/10—Cantilevered erection
Abstract
The invention discloses the construction method that a kind of all welded steel structured bridge of section assembling eliminates residual stress, belong to construction method field.This method comprises the following steps：It is provided for hanging the weight cable of interim hoist cable on the Sarasota of bridge both sides；Using hoist cable is played, the lifting of each section truss section is in place successively, its bolt is anchored and welded after per in place one section truss section, then it is fixed in by an interim hoist cable on weight cable, cancel the hoist cable that rises on the truss section, and adjust the cable force that hangs of all mounted interim hoist cables and be each equal to its lower fixed truss section gravity of itself；After main span is closed up, all interim hoist cables are removed, subsequent construction is carried out.The present invention, which is set, can constrain the compatibility of deformation control of truss section after the interim hoist cable, joggle truss is not subjected to the weight of section below, therefore splicing welding joint no longer stress, the welding residual stress that can be produced with successive elimination external load, it is to avoid the fatigue rupture of steel construction.
Description
Technical field
The invention belongs to construction method field, and in particular to a kind of all welded steel structured bridge of section assembling eliminates residual stress
Construction method.
Background technology
Large-span steel trussed bridge is big due to across footpath, and the weight of truss in itself is very big, it is necessary to carry out at the scene multiple
Weld assembling construction in section.The free cantilever erection construction of such current bridge generally by section truss of first constructing bear after construct section
Weight, knotted rope is set again when jib-length is larger, cantilever segment is held.But the construction method can cause the fatigue life of bridge
It is affected, the current problem not yet draws attention.
It is main in terms of the type selecting of material, preprocessing in fatigue rupture for preventing steel construction, current construction method
It is adjusted.For example postwelding is heat-treated at the appointed time, eliminates residual stress；Or leveling eliminates stress before steel blanking,
Leveling eliminates stress again after blanking, part internal stress is fully discharged.
But, applicant is had found under study for action, for large-span steel trussed bridge, and above-mentioned processing still can not
The fatigue rupture of steel construction is avoided completely, and its basic reason is that after the completion of this kind of construction method is welded in section, welding point will
The load of section below is constantly born, is not eliminated because section weld has welding residual stress, by influence fatigue
Life-span.
For example, the steel truss arch bridge of certain domestic rice of main span more than 300, main span arch rib is installed using " cable hoisting, cantilever are spelled
Connect " construction method, as shown in Figure 1.Section splicing welding joint starts to bear the vertical of lower section load generation after the cooling period quickly
Pressure that power and moment of flexure and knotted rope are produced etc..Because welding residual stress is not completely eliminated yet, to the steel under dynamic loading
Structural fatigue intensity can produce adverse effect.So, how effectively to eliminate the welding residual stress of all welded steel structured trussed bridge
Influence the fatigue life for raising bridge most important.
The content of the invention
It is an object of the invention in current large-span steel bridge installation process, and a kind of section assembling is provided welded entirely
Steel structure bridge eliminates the construction method of residual stress.
Concrete technical scheme of the present invention is as follows：
The all welded steel structured bridge of section assembling eliminates the construction method of residual stress, comprises the following steps：
S1：Truss section can be constrained by being provided for hanging the weight cable of interim hoist cable on the Sarasota of bridge both sides
Compatibility of deformation is controlled；
S2：The first truss section is lifted by crane in place using hoist cable is played, and to being welded after section bolt anchoring；
One end of first interim hoist cable is fixed on weight cable, the other end is fixed on the first truss section；Cancel hoist cable, and
Adjust the first interim hoist cable hangs cable force equal to the first truss section gravity of itself；
S2：The second truss section is lifted by crane in place using hoist cable is played, and to being welded after section bolt anchoring；
One end of second interim hoist cable is fixed on weight cable, the other end is fixed on the second truss section；Cancel hoist cable, and
Adjust the first interim hoist cable, the cable force that hangs of the second interim hoist cable is respectively equal to the first truss section, the second truss section itself
Gravity；
S3：Remaining truss section is lifted by crane in place successively using hoist cable is played, it faced after saving truss section per in place one
When bolt anchoring and weld, be then fixed on weight cable, cancelled on the truss section by an interim hoist cable
Hoist cable is played, and adjusts the cable force that hangs of all mounted interim hoist cables and is each equal to its lower fixed truss section weight of itself
Power；
S4：After main span is closed up, all interim hoist cables are removed, subsequent construction is carried out.
Cancel knotted rope in this method, truss section is fixed using interim hoist cable form, for bearing the vertical of each section
Power, while the compatibility of deformation control of truss section can be constrained for fixing each interim hoist cable by adding a weight cable.When
After often the welding of section truss section is finished, the total weight of its own is supported by interim hoist cable so that the truss section itself
Weight will not be transferred to welding position, so that the residual stress of welding position can be progressively released.Comparatively speaking, Fig. 1
It is middle to apply the form of pulling force using the inclination knotted rope being fixed on Sarasota, welding position can be caused while by truss section certainly
The inclination pulling force effect that body vertical gravity, moment of flexure and knotted rope are produced so that welding position is chronically at load state, remnants should
Power can not be discharged completely.As can be seen here, the present invention is by the improvement on construction, is residual during welding for steel structure
The release of residue stress provides advantage, can necessarily improve its fatigue life.
Preferably, each truss section is from both sides toward the two-way erection of span centre during construction, in Middle span closing.
Preferably, because the load born on weight cable is very big, described weight cable is provided at both ends with rear anchor.
Preferably, described interim hoist cable uses steel wire rope or high-tensile steel wires, and do preservative treatment.
Preferably, described weight cable uses steel wire rope, steel strand wires or high-tensile steel wires, and do preservative treatment.
Preferably, one end of described interim hoist cable is stretching end, for adjusting Suo Li.
The present invention in terms of existing technologies, has the advantages that：
The present invention is directed to all welded steel structured trussed bridge, it is proposed that one kind eliminates full weldering section assembling steel structure truss arch bridge
The construction method of welding residual stress influence.In work progress, truss section is lifted by crane in place with hoist cable is played, bolt anchoring
Welded afterwards, then the interim hoist cable being fixed on weight cable, bear the weight of truss completely by interim hoist cable.Set
The compatibility of deformation control of truss section can be constrained after the interim hoist cable, joggle truss is not subjected to the weight of section below,
Therefore splicing welding joint no longer stress, the welding residual stress that can be produced with successive elimination external load, it is to avoid the fatigue rupture of steel construction.
Brief description of the drawings
Fig. 1 is the lifting facade arrangement schematic diagram constructed using knotted rope mode；
Fig. 2 lifting construction sequential schematics of the present invention, wherein a)~e) it is followed successively by construction procedure；
Fig. 3 present invention lifting facade arrangement schematic diagrames；
Fig. 4 present invention lifting horizontal layout schematic diagrames.
Embodiment
The present invention is further elaborated and illustrated with reference to the accompanying drawings and detailed description.Each in the present invention is implemented
The technical characteristic of mode can carry out respective combination on the premise of not colliding with each other.
(only illustrated as shown in Figure 1 in the present embodiment by taking the left part of bridge as an example, right part is similar), in rope
Weight cable is set on tower, and for fixing interim hoist cable, then with rising, hoist cable is assembled successively in order (section and to be hung by truss section
Rope numbering is respectively 1#~n# from main pier to span centre direction), after bolt anchoring, welding, interim hoist cable is installed, cancels lifting
Section, which has been completed, before rope, and adjustment hangs cable force.
The construction procedure that all welded steel structured bridge of section assembling eliminates residual stress is as follows：
(1) Sarasota is set up in bridge both sides, plays hoist cable and 1# truss section is lifted by crane in place, welded after bolt anchoring
Connect.Then one end of the interim hoist cables of 1# is fixed on weight cable, the other end is fixed on 1# truss section, has cancelled hoist cable
The other end of the interim hoist cable of simultaneous tension, adjustment 1# hangs the weight that cable force is equal to 1# sections, such as Fig. 2 .a temporarily) shown in.Hang
Rope vertical hanging and extended line need guiding through the center of gravity of the truss section, truss section is not produced rotation under by suspension status and incline
To reducing the moment of flexure stress of welding position, follow-up remaining interim hoist cable way identical with use as far as possible.
In the present embodiment, the construction technology of weight cable：(1) material can use steel wire rope, high-tensile steel wires etc., and anti-corrosion
Processing.(2) weight cable is arranged on Sarasota, and cable two ends are anchored on interim anchorage.
In the present embodiment, the construction technology of hoist cable：(1) material can use steel wire rope, high-tensile steel wires, steel strand wires etc., and
Preservative treatment.(2) hoist cable one end is fixed on cable, and the other end is fixed on truss, and one end of hoist cable is stretching end, for adjusting
Whole Suo Li.
(2) play hoist cable and 2# truss section is lifted by crane in place, welded after bolt anchoring, then as before
The interim hoist cables of 2# are installed.Hoist cable is cancelled, will change original 1# due to increasing the interim hoist cables of 2# on weight cable and hang temporarily
The Suo Li of rope, so when need simultaneously adjust 1#, 2# hang cable force temporarily, make 1#, 2# hang temporarily cable force be respectively equal to 1#,
The weight of 2# sections, such as Fig. 2 .b) shown in.
(3) play hoist cable and 3# truss section is lifted by crane in place, welded after bolt anchoring, then as before
Install the interim hoist cables of 3#, has cancelled hoist cable, at the same adjustment 1#, 2#, 3# hang cable force temporarily, make every group of Suo Li be respectively equal to 1#,
The weight of 2#, 3# section, such as Fig. 2 .c) shown in.
Each truss section is installed successively in the above described manner, during construction each truss section from both sides toward the two-way erection of span centre,
Middle span closing, successively, such as Fig. 2 .d)~Fig. 2 .f) shown in ...
(n) truss section in both sides is respectively mounted finish after, play hoist cable and in place, interim spiral shell lifted by crane in final section n# truss section
Welded after bolt anchoring, then the interim hoist cables of n# are installed, cancelled hoist cable, while adjusting 1~n# hangs cable force temporarily, made every
Group Suo Li is respectively equal to the weight of 1~n# sections.
Finally, 1~n# hoist cables are removed after main span is closed up, continue it is follow-up mat formation to wait construct.Final integral installation schematic diagram is such as
Shown in Fig. 3 and 4, thus, each section truss section carries its own weight, adjacent truss section by corresponding interim hoist cable
Between welding position be not stressed or Moment, residual stress is gradually discharged, and does not result in fatigue rupture.
Embodiment described above is a kind of preferably scheme of the present invention, and so it is not intended to limiting the invention.Have
The those of ordinary skill for closing technical field, without departing from the spirit and scope of the present invention, can also make various changes
Change and modification.Therefore the technical scheme that all modes for taking equivalent substitution or equivalent transformation are obtained, all falls within the guarantor of the present invention
In the range of shield.
Claims (6)
1. a kind of all welded steel structured bridge of section assembling eliminates the construction method of residual stress, it is characterised in that including following step
Suddenly：
S1：It is provided for hanging the weight cable of interim hoist cable on the Sarasota of bridge both sides；
S2：The first truss section is lifted by crane in place using hoist cable is played, and to being welded after section bolt anchoring；By
One end of one interim hoist cable is fixed on weight cable, and the other end is fixed on the first truss section；Hoist cable is cancelled, and has adjusted
The cable force that hangs of first interim hoist cable is equal to the first truss section gravity of itself；
S2：The second truss section is lifted by crane in place using hoist cable is played, and to being welded after section bolt anchoring；By
One end of two interim hoist cables is fixed on weight cable, and the other end is fixed on the second truss section；Hoist cable is cancelled, and has adjusted
First interim hoist cable, the cable force that hangs of the second interim hoist cable are respectively equal to the first truss section, the second truss section weight of itself
Power；
S3：Remaining truss section is lifted by crane in place successively using hoist cable is played, saved per in place one behind truss section to its interim spiral shell
Bolt is anchored and welded, and is then fixed in by an interim hoist cable on weight cable, is cancelled the lifting on the truss section
Rope, and adjust the truss section gravity of itself that cable force is each equal to its lower fixation that hangs of all mounted interim hoist cables；
S4：After main span is closed up, all interim hoist cables are removed, subsequent construction is carried out.
2. all welded steel structured bridge of section assembling as claimed in claim 1 eliminates the construction method of residual stress, its feature exists
In each truss section is from both sides toward the two-way erection of span centre during construction, in Middle span closing.
3. all welded steel structured bridge of section assembling as claimed in claim 1 eliminates the construction method of residual stress, its feature exists
In described weight cable is provided at both ends with rear anchor.
4. all welded steel structured bridge of section assembling as claimed in claim 1 eliminates the construction method of residual stress, its feature exists
In described interim hoist cable uses steel wire rope or high-tensile steel wires, and does preservative treatment.
5. all welded steel structured bridge of section assembling as claimed in claim 1 eliminates the construction method of residual stress, its feature exists
In described weight cable uses steel wire rope, steel strand wires or high-tensile steel wires, and does preservative treatment.
6. all welded steel structured bridge of section assembling as claimed in claim 1 eliminates the construction method of residual stress, its feature exists
In one end of described interim hoist cable is stretching end, for adjusting Suo Li.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710427878.7A CN107201726B (en) | 2017-06-08 | 2017-06-08 | The all welded steel structured bridge of section assembling eliminates the construction method of residual stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710427878.7A CN107201726B (en) | 2017-06-08 | 2017-06-08 | The all welded steel structured bridge of section assembling eliminates the construction method of residual stress |
Publications (2)
| Publication Number | Publication Date |
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| CN107201726A true CN107201726A (en) | 2017-09-26 |
| CN107201726B CN107201726B (en) | 2018-12-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109972845A (en) * | 2019-04-11 | 2019-07-05 | 中国十九冶集团有限公司 | The installation method of steel roof truss |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000110117A (en) * | 1998-08-06 | 2000-04-18 | Kobe Steel Ltd | Floor slab and construction method therefor |
| CN1804216A (en) * | 2006-01-20 | 2006-07-19 | 中铁三局集团有限公司 | Short-sleeper long-lump integrated ballast bed seamless track construction method |
| CN101235624A (en) * | 2008-01-24 | 2008-08-06 | 中铁工程设计咨询集团有限公司 | Construction method for steel structure arch rib of arch-type bridge |
| CN102936962A (en) * | 2012-11-20 | 2013-02-20 | 永升建设集团有限公司 | Construction method of slanting cantilever steel structure supported by temporary steel frame |
| CN104612058A (en) * | 2014-12-26 | 2015-05-13 | 中铁大桥勘测设计院集团有限公司 | Construction method of flexible arch bridge with rigid beams |
| CN105735129A (en) * | 2016-02-26 | 2016-07-06 | 江苏中铁山桥重工有限公司 | Full-welding truss section modularized splicing method |
-
2017
- 2017-06-08 CN CN201710427878.7A patent/CN107201726B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000110117A (en) * | 1998-08-06 | 2000-04-18 | Kobe Steel Ltd | Floor slab and construction method therefor |
| CN1804216A (en) * | 2006-01-20 | 2006-07-19 | 中铁三局集团有限公司 | Short-sleeper long-lump integrated ballast bed seamless track construction method |
| CN101235624A (en) * | 2008-01-24 | 2008-08-06 | 中铁工程设计咨询集团有限公司 | Construction method for steel structure arch rib of arch-type bridge |
| CN102936962A (en) * | 2012-11-20 | 2013-02-20 | 永升建设集团有限公司 | Construction method of slanting cantilever steel structure supported by temporary steel frame |
| CN104612058A (en) * | 2014-12-26 | 2015-05-13 | 中铁大桥勘测设计院集团有限公司 | Construction method of flexible arch bridge with rigid beams |
| CN105735129A (en) * | 2016-02-26 | 2016-07-06 | 江苏中铁山桥重工有限公司 | Full-welding truss section modularized splicing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109972845A (en) * | 2019-04-11 | 2019-07-05 | 中国十九冶集团有限公司 | The installation method of steel roof truss |
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| Publication number | Publication date |
|---|---|
| CN107201726B (en) | 2018-12-04 |
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Effective date of registration: 20190822 Address after: 315 000 No. 72 Songzhaoqiao Road, Ningbo City, Zhejiang Province Co-patentee after: Tibet Ganoderma Lucidum Construction Consulting Group Co., Ltd. Patentee after: NINGBO COMMUNICATIONS PLANNING INSTITUTE CO., LTD. Address before: 315 000 No. 72 Songzhaoqiao Road, Ningbo City, Zhejiang Province Patentee before: NINGBO COMMUNICATIONS PLANNING INSTITUTE CO., LTD. |
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