CN114808774A - Method for dismantling upper-span bridge body - Google Patents
Method for dismantling upper-span bridge body Download PDFInfo
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- CN114808774A CN114808774A CN202210583014.5A CN202210583014A CN114808774A CN 114808774 A CN114808774 A CN 114808774A CN 202210583014 A CN202210583014 A CN 202210583014A CN 114808774 A CN114808774 A CN 114808774A
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000010276 construction Methods 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000005520 cutting process Methods 0.000 claims abstract description 30
- 238000005553 drilling Methods 0.000 claims abstract description 26
- 230000001681 protective effect Effects 0.000 claims abstract description 7
- 239000011150 reinforced concrete Substances 0.000 claims description 10
- 239000004567 concrete Substances 0.000 claims description 8
- 239000010426 asphalt Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000004904 shortening Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 239000000498 cooling water Substances 0.000 description 5
- 239000011083 cement mortar Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 244000025254 Cannabis sativa Species 0.000 description 2
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 2
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- 238000012790 confirmation Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000011487 hemp Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
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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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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Abstract
The invention discloses a method for dismantling a beam body of an overpass bridge, which creatively adopts a water mill drill as a cutting tool for separating the beam body according to the special working condition of the bridge, combines the drilling characteristics of the water mill drill and the bridge structure, and pertinently selects the drilling diameter and the drilling depth of the water mill drill, and can carry out construction under the condition of ensuring the construction safety, namely, a protective shed frame does not need to be erected, and the window period of the operation of downward threading does not need to be waited, thereby shortening the dismantling construction period of the bridge, reducing the dismantling cost, and being suitable for dismantling the beam body of a box type bridge under the special working condition.
Description
Technical Field
The invention relates to the field of building construction, in particular to the field of bridge dismantling construction, and particularly relates to a dismantling method of an upper-span bridge body.
Background
With the economic development, the promotion of urbanization and the improvement of the living standard of people in China and regions, many box girder bridges cannot meet the current traffic demand due to capital and planning during construction, so in order to meet the demand of local economic development and improve the trip quality of local residents, the bridges are usually required to be dismantled and rebuilt.
The box girder type overpass bridge is a very conventional bridge type, and is also a type of bridge frequently encountered in the bridge dismantling process in cities. The method is characterized in that the box girder type overpass bridge is dismantled under two working conditions of stopping operation of a lower crossing traffic line and keeping operation of the lower crossing traffic line according to objective traffic demands. Under the working condition that the lower cross traffic line stops operating, the dismantling limiting condition is small, the dismantling difficulty is small, and the purpose of quick and safe dismantling can be achieved by the conventional bridge dismantling method. The dismantling method is more complex under the working condition that the lower cross traffic line keeps operating; for such bridges, most of the existing conventional dismantling methods need to firstly erect a protective shed frame and then adopt a mechanical cutting or manual method to dismantle the existing beam body, and although the dismantling process is relatively complex, the aim of quick and safe dismantling can be basically achieved. However, under the working conditions that the protective shed frame cannot be erected or is very difficult to erect due to the factors such as insufficient height or electric wires, the conventional dismantling method cannot well achieve the purpose of quick and safe dismantling, and the dismantling construction of the bridge is usually carried out at skylight points, so that the defects of long construction time, high safety risk, large influence caused by the operation of a lower cross traffic line, uncontrollable construction period and the like exist, and the dismantling and rebuilding of the bridge are seriously influenced.
Disclosure of Invention
The invention aims to overcome the defects of long construction time, high safety risk, large influence caused by operation of a lower traffic line and uncontrollable construction period of a cross-line bridge under the condition of special working conditions (a protective shed frame cannot be erected and the lower traffic line needs to be kept in operation) for dismantling a bridge in the conventional bridge dismantling method.
In order to achieve the purpose, the invention provides a method for dismantling an overpass bridge body, which comprises the following steps:
(1) dismantling and cleaning auxiliary structures on the bridge floor; dismantling the pavement structure;
(2) confirming the hinge joint positions at two ends of the beam body, longitudinally connecting and marking the hinge joints at two ends of the same beam body, and positioning to obtain a hinge joint cutting line;
(3) confirming the thickness H of the beam surface pavement layer 1 Thickness H of reinforced concrete layer between beam bodies 2 Width L and height H of hinge joint 3 ；
(4) According to the width L and the height H of the hinge joint 3 Thickness H of reinforced concrete layer between beam bodies 2 And the thickness H of the beam surface pavement layer 1 Confirming the drilling diameter d and the drilling depth h of the water grinding drill; meanwhile, under the conditions that threading operation is not influenced and safety is guaranteed, at least one drain hole is formed in each bridge hinge joint cutting line;
(5) taking the drainage hole as a starting point, adopting a water mill drill to continuously drill and core according to the confirmed diameter and depth of the drilled hole in the direction that the center of the drilled hole is overlapped with the hinge joint cutting line, and enabling adjacent drilled holes to be tangent or partially overlapped until the drainage hole of the hinge joint cutting line is cut;
(6) and after removing the residual concrete between the hinge joints at the beam ends, separating the beam body, and hoisting to move to finish the dismantling of the beam body.
The invention relates to a method for dismantling a beam body of an up-span bridge, which creatively adopts a water mill drill as a cutting tool for beam body separation according to the special working condition of the bridge, combines the drilling characteristics of the water mill drill and the bridge structure, and pertinently selects the drilling diameter and the drilling depth of the water mill drill, and can carry out construction under the condition of ensuring the construction safety, namely, a protective shed frame does not need to be erected, and the window period of lower threading operation does not need to be waited, thereby shortening the dismantling construction period of the bridge, reducing the dismantling cost and being suitable for dismantling the beam body of a box type bridge under the special working condition.
Before the step (1), finding completion data of a bridge to be dismantled, knowing the structural form of the beam body, excavating backfill soil behind the bridge abutments at two ends to the elevation position of the bottom surface of the beam, chiseling the back wall of the bridge abutment, leaking the end part of the hollow beam body, and checking whether the length and the section size of the beam body are consistent with the completion data; the actual condition of the bridge to be dismantled is confirmed through checking the construction data and the size of the beam body, preparation work is made for the dismantling of the bridge, and the method has a positive effect on ensuring the smooth and safe dismantling of the bridge.
In the step (1), the auxiliary structure includes, but is not limited to, one or more of a guardrail, a street lamp, an anti-throwing net, a sidewalk and a curb; demolish the auxiliary structure earlier, can avoid demolising the in-process, drop of auxiliary structure reduces the potential safety hazard, simultaneously, demolish the construction earlier stage more convenient, safety.
In the step (1), the pavement structure is one or more of an asphalt pavement or a concrete pavement, a bridge deck cast-in-place leveling layer and a bridge deck pavement layer which are paved on the beam deck pavement layer; after the pavement structure is removed, the bridge deck pavement layer can be exposed to prepare for the water mill drilling and hole array cutting; meanwhile, the weight of the single beam can be reduced, and the load during hoisting and moving can be reduced.
In the step (3), the thickness of the beam surface pavement layer and the width and the height of the hinge joint can be obtained according to a bridge completion map, and a small-range test is carried out to confirm the thickness and the width and the height of the hinge joint.
In the step (4), the diameter of the drill hole of the water mill drill is smaller than the width of the hinge joint and larger than half of the width of the hinge joint, namely L/2 is larger than or equal to d and smaller than L; the drilling depth is less than the sum of the thickness of the beam surface pavement layer and the height of the hinge joint and greater than the sum of the thickness of the beam surface pavement layer and the thickness of the reinforced concrete layer between the beam bodies, namely H 1 +H 2 ≤h＜H 1 +H 3 (ii) a The optimized drilling diameter and depth have no influence on the beam body structure, and no reinforced concrete connection between the beam bodies can be guaranteed, so that the beam bodies in the later period can be separated and hoisted conveniently, the hinge joint cannot be drilled, and the drilling slag falls off to cause influence on the operation of a downward-passing line.
In the step (4), the arrangement of the drain holes is adjusted according to the actual situation of the place where the bridge is located, and the drain holes can be drain holes formed by drilling through the hinge joints by using a water mill core, or drainage ditches arranged along the hinge joints; the drain hole is arranged on the basis that cooling water of the water grinding drill can be drained in time, and threading operation and safety are not affected.
Wherein, in the step (5), before drilling by using the water mill drill, a reaction frame for water mill drill construction is erected; the reaction frame can ensure the stability of the water mill drill in the construction process and the smooth and straight drilling direction.
Wherein, in the step (5), preferably, the partial overlapping means that the cutting lines overlap 0.5-3cm between the adjacent drill holes; the preferred overlap reduces the number of holes drilled and cuts the row of perforations in a shorter time.
In the step (6), the separating of the beam bodies means that a jack with the weight larger than that of the beam is used for pre-jacking at a position, 10cm away from the beam end, of one end of the beam body by using a skylight point of the lower threading, the jacking beam is upwards displaced by about 5cm relative to the adjacent beam bodies, and the adjacent beam bodies are determined to be in a separated state.
Compared with the prior art, the invention has the beneficial effects that:
the method for dismantling the box-type bridge adopts the water mill drill as a cutting tool for separating the beam body, and during the cutting process, the hinge joint cannot be cut through, and building slag cannot fall onto a lower threading line, so that construction can be carried out under the conditions that a protective shed frame does not need to be erected, and the operation of lower threading is not influenced, the dismantling period of the bridge is shortened, the dismantling cost of the bridge is reduced, waste is reduced, and the method is suitable for dismantling the beam body of the box-type bridge under the special working condition.
Description of the drawings:
FIG. 1 is a construction flow chart in example 1 of the present invention;
FIG. 2 is a schematic size diagram of a bridge structure according to embodiment 1 of the present invention;
FIG. 3 is a photograph of a preparation for construction in example 1 of the present invention;
FIG. 4 is a photograph showing the demolition of the bridge deck according to embodiment 1 of the present invention
FIG. 5 is a photograph showing the construction of the positioning hinge joint cutting line in embodiment 1 of the present invention
FIG. 6 is a photograph of a construction for confirming the size of a drilled hole in example 1 of the present invention
FIG. 7 is a photograph showing the construction of a drainage hole in example 1 of the present invention
FIG. 8 is a photograph of the hinge joint cutting construction of embodiment 1 of the present invention
FIG. 9 is a photograph of the beam separation and hoisting construction in example 1 of the present invention
Reference numerals: 1-reinforced concrete layer between the beam bodies; 2-a beam surface pavement layer; 3-a beam body; 4-hinge joint bottom seam; 5-hinge joint.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
Example (b):
the demolition method is adopted to demolish the Wanjia yard overpass (1-20 m) at 7 standard sections K420+375 of the second line station front engineering from the Yuhua railway Fuling to the Meijiang section, and the specific construction steps are as follows:
(1) construction preparation: confirming the relative position relationship between the existing railway equipment and other structures and the overpass bridge; the rated voltage of the existing line contact network line is 25kV, the distance between the contact network and the beam bottom is about 1.8m, and the distance between the carrier cable and the beam bottom is about 1 m; before construction, searching for completion data of an existing highway bridge, knowing the structural form of a beam body, excavating backfill behind abutments at two ends to a beam bottom surface elevation position by using an excavator, then chiseling off a back wall of the abutment by using a hydraulic crushing head, leaking the end part of a hollow plate beam, measuring the length of the beam body, and performing demolition construction after the cross-sectional dimension of the beam body is matched with the completion data. The water source and the power supply are switched on, and materials and machines used for construction are transported to the right place to achieve the condition of starting the construction;
(2) dismantling the bridge deck: firstly, removing guardrails, street lamps, anti-throwing nets, sidewalks and kerbs on a road surface; then, a small-sized hydraulic crushing head is used for crushing the asphalt pavement, and then manual cleaning is carried out, mainly aiming at reducing the weight of the single beam and reducing the load during hoisting; simultaneously exposing a bridge deck pavement layer to prepare for the water mill drilling and hole-arranging cutting;
(3) positioning a hinge seam cutting line: after chiseling off both ends of the beam body, determining the position of the hinge joint at both ends, longitudinally connecting the hinge joints at both ends of the beam with a straight line, drawing a hinge joint cutting line on the bridge floor by using red paint, and positioning a water-outlet abrasive drilling drainage hole cutting line;
(4) confirming the size of the bridge structure; the method comprises the steps of displaying the thickness H1=10cm of reinforced concrete of a beam surface pavement layer according to an old bridge completion drawing, manually chiseling concrete in a cutting range by using a pneumatic pick after cutting a cube which is 30cm long, 30cm wide and 10cm thick on the bridge surface pavement layer by taking a hinge cutting line as a central line by using a small-sized disc cutting machine (the diameter is 20 cm), and confirming that the width L of a hinge is about 11cm according to the site by searching for an interface formed by different pouring time of the hinge and the pavement layer concrete and the beam body; according to the dimension of the beam part checked on site, the width of a hinge joint at two ends of the beam body within the range of 1.1m is only 1-2cm, cement mortar is adopted for filling, completion data shows that the height H3 of the hinge joint is 830mm, and the thickness H2 of a reinforced concrete layer between the beam bodies is 780 mm;
(5) confirming the size of the drilled hole: according to the on-site confirmation that the width L of the hinge joint is about 11cm, coring is carried out by adopting a water mill drill with the diameter phi of 100mm, and the beam body structure is basically not influenced; the method comprises the following steps that (1) a water mill drill hole needs to be cut off connecting steel bars in a pavement layer and a hinge joint, so that the drilling depth h of the water mill drill hole needs to reach 850-930 mm, only cement mortar with the thickness of 120mm at the bottom of a beam is reserved, and no reinforced concrete connection exists between beam bodies;
arranging a drain hole: according to on-site investigation, the clear distance between the cross-line highway bridge and the top surface of the existing railway line is about 6.2m, the distance between the bottom of the bridge and the contact network line is about 1.8m, a large amount of cooling water is used in the process of water mill drilling and hole-discharging cutting, in order to ensure that the discharge of the cooling water does not influence the operation of the railway line, a core is drilled by using a water mill at the position (about 1.5m away from the end of the beam) corresponding to a railway ditch before construction, a beam body is drilled through, and a drain hole is arranged, so that the cooling water enters the existing ditch to be discharged, and the discharge of the cooling water is ensured not to influence the normal operation of the railway line;
(6) drilling and cutting: a reaction frame for the water mill drill construction is erected by using a steel pipe frame, so that the stability and the straight drilling direction in the water mill drill construction process are ensured. The reaction frame is a cuboid which is assembled by 10 steel pipe frames through fasteners, the length of the cuboid is 5-6 m, the width of the cuboid is 1m, the reaction frame is fixed on a beam body through expansion bolts and steel wires at the bottom in the water mill drilling construction, a wood plate with the thickness of 3cm is bound on the top of the reaction frame through steel bars and used as a top plate, and the wood plate is tightly propped against the top in the water mill drilling construction; and then core taking holes are arranged according to the length of the bridge, the centers of the core taking holes are overlapped with the cutting lines, the adjacent core taking holes are overlapped by about 2-3 cm, and the process from the drainage hole at one end of the beam to the drainage hole at the other end is finished. Dividing the water mill drill row hole into 4 operation sections according to the length of the reaction frame, and moving the reaction frame to the next operation section after each section of core taking within the length range of the reaction frame is completed until the hinge joint cutting work between the beams is completed;
(7) separating and hoisting the beam body: according to the completion data of the old bridge and the on-site checking condition, the hinge joint distance of the two ends of the beam in the range of 1.1m is only 1-2cm, and if the concrete of a part of the beam body is cut by adopting a water mill drill row hole, the beam body is damaged, so that great hidden danger exists. The hinge joint at the end part of the beam is filled with cement mortar after field confirmation, the strength is lower, an electric hammer can be matched with a long drill rod to remove the cement mortar, the drill rod is automatically processed by adopting reinforcing steel bars, and the length of the drill rod is about 1.3 m. Before removing the hinge joint at the beam end, chiseling off the beam surface pavement concrete in the range by using a small circular saw (with the radius of 10 cm) and an air pick in a matching manner; and pre-jacking one end of the beam body at a position which is 10cm away from the beam end by using a jack which is heavier than the beam at the skylight point, and jacking the beam to move upwards about 5cm relative to the adjacent beam body to determine that the adjacent beam bodies are in a separated state. The roof beam is heavy about 45.5t in this engineering, adopts thrust 50t jack to jack in advance every well roof beam in proper order from the outside to inboard at bridge downstream side roof beam body center line position, ensures that every roof beam body all is in the separation state, guarantees to hang and moves process safety smoothly. According to the calculation of completion data, the designed weight of the beam is about 45.5t, the weight of an anti-collision wall of the side beam is about 25.5t, the heaviest side beam is about 71t, a crane is erected on an Xiushan end bridge abutment according to the field condition, the operating radius of the crane is 17m, the length of a main arm is 31.2m, a 400t crane is selected, the rated lifting capacity is 69t, and 9 beams are lifted to a specified position from the side far away from a new bridge one by one within a skylight point (180 minutes). Because the existing beam has no lifting hook, the beam is lifted by adopting a pocket bottom type beam bundling method, and the lifting point of the beam body is displayed to be positioned at a position about 1.5m away from the beam end according to the reference drawing, so that the water drain hole can be used as a beam body lifting hole, and the water mill can play a role in limiting the steel wire rope when the sunken part of the core hole is drilled by the water mill and moved. In order to conveniently bind the beam body, one end of the steel wire rope is firmly bound by a hemp rope, the other end of the steel wire rope falls to the bottom of the bridge from the drilled hole, the other hemp rope is pulled out from the other hole of the beam and is firmly fastened at the edge of the plate by a shackle, and the steel wire rope at the other end of the beam body is bound by the steel wire rope at the other end of the beam body in the same method. The hoisting method comprises the steps of rotating a hoisting arm of a crane above a hoisted beam, hooking hoisting hooks on hoisting points at two ends of a beam plate respectively, slowly lifting the hoisting hooks, stopping hoisting the hoisting hooks after a steel wire rope is tightened, checking the center of the hoisting hooks and the conditions of the hoisting points, and slowly hoisting again after no fault exists. And after the beam is lifted to a proper height, the beam is rotated to a specified position, and after the beam is lifted, the beam is chiseled by a hydraulic crushing head and transported to a specified waste soil yard.
Claims (6)
1. A method for dismantling an upper-span bridge body is a box-type bridge which cannot be erected for a protective shed frame and needs to be operated by passing through a traffic line at the lower part, and is characterized by comprising the following steps of:
(1) dismantling and cleaning auxiliary structures on the bridge floor; dismantling the pavement structure;
(2) confirming the hinge joint positions at two ends of the beam body, longitudinally connecting and marking the hinge joints at two ends of the same beam body, and positioning to obtain a hinge joint cutting line;
(3) confirming the thickness H of the beam surface pavement layer 1 Thickness H of reinforced concrete layer between beam bodies 2 Width L and height H of hinge joint 3 ；
(4) According to the width L and the height H of the hinge joint 3 Thickness H of reinforced concrete layer between beam bodies 2 And the thickness H of the beam surface pavement layer 1 Confirming the drilling diameter d and the drilling depth h of the water grinding drill; meanwhile, under the conditions of not influencing threading operation and ensuring safety, at least one drain hole is arranged on each bridge hinge joint cutting line;
(5) taking the drainage hole as a starting point, adopting a water mill drill to continuously drill and core according to the confirmed diameter and depth of the drilled hole in the direction that the center of the drilled hole is overlapped with the hinge joint cutting line, and enabling adjacent drilled holes to be tangent or partially overlapped until the drainage hole of the hinge joint cutting line is cut;
(6) and after removing the residual concrete between the hinge joints at the beam ends, separating the beam body, and hoisting to move to finish the dismantling of the beam body.
2. The demolition method according to claim 1 wherein in step (1) the auxiliary structure comprises but is not limited to one or more of a guardrail, a street light, an anti-drop net, a sidewalk, a kerb.
3. The demolition method according to claim 1 wherein in step (1) the pavement structure is one or more of an asphalt or concrete pavement laid on the beam pavement, a bridge deck cast-in-place leveling layer, and a bridge deck pavement layer.
4. The demolition method according to claim 1 wherein in step (4) L/2 ≦ d < L; h 1 +H 2 ≤h＜H 1 +H 3 。
5. The demolition method according to claim 1 wherein step (5) further comprises setting up a reaction frame for the water mill construction before drilling with the water mill drill.
6. The demolition method according to claim 1, characterised in that in step (5) the partial overlap is an overlap of the cutting lines between adjacent boreholes of 0.5-3 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210583014.5A CN114808774B (en) | 2022-05-26 | Method for dismantling upper span bridge girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210583014.5A CN114808774B (en) | 2022-05-26 | Method for dismantling upper span bridge girder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114808774A true CN114808774A (en) | 2022-07-29 |
| CN114808774B CN114808774B (en) | 2024-06-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116657511A (en) * | 2023-04-28 | 2023-08-29 | 北京城建华晟交通建设有限公司 | Method for rapidly dismantling reinforced concrete continuous beam bridge crossing expressway during temporary traffic interruption |
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| JP2005240488A (en) * | 2004-02-27 | 2005-09-08 | Kuraimu:Kk | Demolishing method of precast concrete bridge |
| CN209703267U (en) * | 2019-02-22 | 2019-11-29 | 刘佳佳 | A kind of bridge construction ruggedized construction |
| CN110792044A (en) * | 2019-08-22 | 2020-02-14 | 中铁十二局集团有限公司 | Construction method for quickly dismantling overpass |
| CN113931091A (en) * | 2021-12-08 | 2022-01-14 | 中铁十局集团第一工程有限公司 | Construction method for dismantling wide-width continuous beam of business line of overpass railway |
| CN114032794A (en) * | 2021-11-24 | 2022-02-11 | 中天交通建设投资集团有限公司 | Integral demolition construction process for large-span truss concrete bridge |
| CN216238161U (en) * | 2021-11-22 | 2022-04-08 | 中铁一局集团桥梁工程有限公司 | Box girder water escape hole installation device |
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005240488A (en) * | 2004-02-27 | 2005-09-08 | Kuraimu:Kk | Demolishing method of precast concrete bridge |
| CN209703267U (en) * | 2019-02-22 | 2019-11-29 | 刘佳佳 | A kind of bridge construction ruggedized construction |
| CN110792044A (en) * | 2019-08-22 | 2020-02-14 | 中铁十二局集团有限公司 | Construction method for quickly dismantling overpass |
| CN216238161U (en) * | 2021-11-22 | 2022-04-08 | 中铁一局集团桥梁工程有限公司 | Box girder water escape hole installation device |
| CN114032794A (en) * | 2021-11-24 | 2022-02-11 | 中天交通建设投资集团有限公司 | Integral demolition construction process for large-span truss concrete bridge |
| CN113931091A (en) * | 2021-12-08 | 2022-01-14 | 中铁十局集团第一工程有限公司 | Construction method for dismantling wide-width continuous beam of business line of overpass railway |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116657511A (en) * | 2023-04-28 | 2023-08-29 | 北京城建华晟交通建设有限公司 | Method for rapidly dismantling reinforced concrete continuous beam bridge crossing expressway during temporary traffic interruption |
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