CN216194138U - Existing bridge pier stud construction system of rectifying - Google Patents
Existing bridge pier stud construction system of rectifying Download PDFInfo
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- CN216194138U CN216194138U CN202122682711.XU CN202122682711U CN216194138U CN 216194138 U CN216194138 U CN 216194138U CN 202122682711 U CN202122682711 U CN 202122682711U CN 216194138 U CN216194138 U CN 216194138U
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Abstract
The application discloses existing bridge pier stud construction system of rectifying relates to bridge engineering technical field. The construction system comprises a supporting mechanism, a first adjusting mechanism and a second adjusting mechanism; the supporting mechanisms are arranged on two sides of the pier stud; the bottom of the first adjusting mechanism is connected to the top of the supporting mechanism; the top of the first adjusting mechanism is connected with a cover beam; the second adjusting mechanism is arranged between the cover beam and the box beam. According to the embodiment of the utility model, the support mechanism is adopted to support the capping beam, the box girder above the capping beam and part of the pier column below the capping beam, the original part of the pier column and the original foundation can be chiseled off, so that the capping beam of the pier is suspended, and the first adjusting mechanism can adjust the vertical offset of the capping beam. The first adjusting mechanism and the second adjusting mechanism jointly act to adjust the horizontal offset of the cover beam. The technical problems that the whole pier needs to be replaced due to offset, the construction period is long and the construction cost is high are effectively solved, uninterrupted traffic is realized, the cost is low, and the pier offset damage is quickly eliminated.
Description
Technical Field
The application relates to the technical field of bridge engineering, in particular to an existing bridge pier stud deviation rectifying construction system.
Background
In actual engineering, the correction measures for pier column deviation are reinforcement treatment aiming at the problems that the strength of pier column concrete is low and local concrete has serious defects due to external load above the ground, and the existing method cannot effectively correct the deviation of the pier in the engineering that the pier foundation is subjected to external factors to cause the pier deviation. With the rapid increase of the number of bridges at home and abroad, the bridges are built in more complex geological environments.
In the project of bridge pier displacement caused by geological factors during bridge operation, the existing reinforcement treatment is to jack the bridge in a full-link manner and replace the whole bridge pier, so that the construction period is long, traffic needs to be interrupted during construction, and meanwhile, the project cost is high.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides an existing bridge pier stud construction system of rectifying, has solved among the prior art pier skew and has needed whole change, and the technical problem that the engineering period is long and the labour cost is high has realized uninterrupted traffic, low-cost, eliminate the harm of pier skew fast.
The embodiment of the utility model provides an existing bridge pier stud deviation rectifying construction system which comprises a supporting mechanism, a first adjusting mechanism and a second adjusting mechanism, wherein the first adjusting mechanism is arranged on the supporting mechanism; the supporting mechanisms are arranged on two sides of the pier stud, the bottoms of the supporting mechanisms are connected to a foundation, and the tops of the supporting mechanisms support the first adjusting mechanism; the bottom of the first adjusting mechanism is connected to the top of the supporting mechanism; the top of the first adjusting mechanism is connected with the cover beam and can adjust the vertical offset of the cover beam; the second adjusting mechanism is arranged between the cover beam and the box beam, is used for supporting the box beam and is used for adjusting the transverse deviation of the cover beam under the combined action of the first adjusting mechanism and the second adjusting mechanism.
In one possible implementation manner, the supporting mechanism comprises a short pile foundation, a steel pipe column, a cross beam and a longitudinal beam; the bottoms of the short pile foundations are connected with a foundation, the steel pipe columns are connected to the tops of the short pile foundations, and the lower ends of the steel pipe columns are embedded into the short pile foundations; the cross beam is connected to the top of the steel pipe column on the same side of the pier column; the longitudinal beams are connected to the tops of the cross beams, and the tops of the longitudinal beams are connected.
In one possible implementation, the support mechanism further comprises a cross brace and a diagonal brace; a plurality of cross braces are arranged in the vertical direction of the steel pipe column, and two ends of each cross brace are respectively connected to the steel pipe columns adjacent in the vertical direction; two ends of the inclined struts are respectively connected to the steel pipe columns which are adjacent in the vertical direction, and are connected with the adjacent cross struts.
In one possible implementation, the first adjustment mechanism includes a first horizontal jacking jack, a first vertical jacking jack, and a first slide plate; the first sliding plate is arranged between the cross beam and the longitudinal beam; the first horizontal pushing jack is arranged at the top of the cross beam and acts on the longitudinal beam; the first vertical pushing jacks are sequentially arranged at the tops of the longitudinal beams and act on the bottoms of the bent caps.
In one possible implementation, the second adjustment mechanism includes a second horizontal jacking jack, a second vertical jacking jack, and a second slide plate; the second sliding plate is arranged at the top of the cover beam; the second vertical pushing jack is arranged at the top of the second sliding plate and acts on the box girder; and the second horizontal pushing jack is arranged at the top of the second sliding plate and acts on the cushion stone between the cover beam and the box beam.
One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:
in the embodiment of the utility model, the supporting mechanisms are arranged on two sides of the pier stud and are used for supporting the capping beam, the box beam above the capping beam and part of the pier stud below the capping beam, so that the original residual pier stud and the foundation can be chiseled off, the capping beam of the pier is suspended and can move, and the vertical offset of the capping beam can be adjusted by the first adjusting mechanism between the supporting mechanism and the capping beam; the second adjusting mechanism between the cover beam and the box beam and the first adjusting mechanism between the supporting mechanism and the cover beam act together to adjust the horizontal deviation of the cover beam. The technical problems that the bridge pier is required to be integrally replaced due to offset, the construction period is long and the construction cost is high are effectively solved, uninterrupted traffic is realized, the cost is low, and the bridge pier offset damage is quickly eliminated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments of the present invention or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an existing bridge pier column deviation rectifying construction system according to an embodiment of the present application;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic structural diagram of a first adjustment mechanism provided in an embodiment of the present application;
FIG. 4 is a schematic structural diagram of a second adjustment mechanism provided in an embodiment of the present application;
fig. 5 is a schematic structural diagram of a new pile foundation and a new pile cap provided in an embodiment of the present application.
Reference numerals: 1-a support mechanism; 11-short pile foundation; 12-steel pipe column; 13-horizontal bracing; 14-inclined strut; 15-a cross beam; 16-a stringer; 2-a first adjustment mechanism; 21-a first horizontal jacking jack; 22-a first vertical jacking jack; 23-a first sled; 3-a second adjustment mechanism; 31-a second horizontal jacking jack; 32-a second vertical jacking jack; 33-a second sled; 34-a pad stone; 4-a box girder; 5-a capping beam; 6-pier stud; 7-new bearing platform; 8-new pile foundation.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
The embodiment provides an existing bridge pier column deviation rectifying construction system, please refer to fig. 1 to 5 in the drawings of the specification together.
Referring to fig. 1, an existing bridge pier column deviation rectifying construction system comprises a supporting mechanism 1, a first adjusting mechanism 2 and a second adjusting mechanism 3; the supporting mechanism 1 is arranged on two sides of the pier stud 6, the bottom of the supporting mechanism 1 is connected to a foundation, and the top of the supporting mechanism 1 supports the first adjusting mechanism 2; the bottom of the first adjusting mechanism 2 is connected to the top of the supporting mechanism 1; the top of the first adjusting mechanism 2 is connected with a bent cap 5, and the bent cap 5 can be adjusted to vertically deviate; the second adjusting mechanism 3 is arranged between the capping beam 5 and the box beam 4 for supporting the box beam 4 and co-acts with the first adjusting mechanism 2 for adjusting the lateral offset of the capping beam 5.
In the embodiment of the utility model, the supporting mechanisms 1 are arranged on two sides of the pier stud 6 and are used for supporting the coping 5, the box girder 4 above the coping 5 and the part of the pier stud 6 below the coping 5, so that the original rest of the pier stud 6 and the foundation can be chiseled off, the coping 5 of the pier can be suspended in the air and can move, and the first adjusting mechanism 2 between the supporting mechanism 1 and the coping 5 can adjust the vertical offset of the coping 5; the second adjusting mechanism 3 between the lid beam 5 and the box beam 4, in cooperation with the first adjusting mechanism 2 between the support mechanism 1 and the lid beam 5, enables the horizontal offset of the lid beam 5 to be adjusted. The technical problems that the bridge pier is required to be integrally replaced due to offset, the construction period is long and the construction cost is high are effectively solved, uninterrupted traffic is realized, the cost is low, and the bridge pier offset damage is quickly eliminated.
With continued reference to fig. 1, the support mechanism 1 includes a short pile foundation 11, a steel pipe column 12, a cross beam 15 and a longitudinal beam 16; the bottoms of the plurality of short pile foundations 11 are connected with a foundation, the steel pipe column 12 is connected to the top of the short pile foundations 11, and the lower end of the steel pipe column 12 is embedded into the short pile foundations 11; the cross beam 15 is connected to the top of the steel pipe column 12 positioned on the same side of the pier column 6; the longitudinal beams 16 are connected to the top of the cross beam 15, and the top of the plurality of longitudinal beams 16 are connected.
The cross beams 15 are arranged on two transversely adjacent steel pipe columns 12 on the same side of the pier column 6, namely, 4 cross beams 15 are arranged. The longitudinal beams 16 are arranged on two adjacent cross beams 15 on the same side, and 1 longitudinal beam 16 is arranged on the cross beam 15 on each side, namely 2 longitudinal beams 16 are arranged in total. The height of the steel pipe column 12 is based on that after the cross beam 15 and the longitudinal beam 16 are built, the distance between the longitudinal beam 16 and the bottom end of the cover beam 5 can enable the first vertical pushing jack 22 to be put in.
Referring to fig. 1 and 2, the support mechanism 1 further includes a cross brace 13 and an inclined brace 14; a plurality of cross braces 13 are arranged in the vertical direction of the steel pipe column 12, and two ends of each cross brace 13 are respectively connected to the steel pipe columns 12 adjacent in the vertical direction; both ends of the plurality of diagonal braces 14 are connected to the vertically adjacent steel pipe columns 12, respectively, and are connected to the adjacent wales 13.
The wales 13 and the diagonal wales 14 are for enhancing the stability of the supporting mechanism 1. The stull 13 is connected between adjacent steel-pipe column 12, including between the steel-pipe column 12 of homonymy and be located between the steel-pipe column 12 of pier stud 6 both sides, and the bracing 14 is connected between adjacent stull 13 from top to bottom, and two bracings 14 intercrossing constitute the triangular supports with the stull 13, strengthen the connection between the adjacent steel-pipe column 12, increase supporting mechanism 1's stability. The wales 13 and the diagonal braces 14 may be provided in plural sets in the vertical direction according to the height of the steel pipe column 12.
Referring to fig. 3, the first adjusting mechanism 2 comprises a first horizontal jacking jack 21, a first vertical jacking jack 22 and a first sliding plate 23; the first sliding plate 23 is arranged between the cross beam 15 and the longitudinal beam 16; the first horizontal pushing jack 21 is arranged at the top of the cross beam 15 and acts on the longitudinal beam 16; the first vertical jacking jacks 22 are sequentially arranged at the tops of the longitudinal beams 16 and act on the bottoms of the capping beams 5.
The first sliding plate 23 is a steel plate, the bottom of the first sliding plate 23 is fixedly connected with the cross beam 15, the top of the first sliding plate 23 is in contact with the longitudinal beam 16, and the first horizontal pushing jack 21 is fixed with the cross beam 15 and acts on the longitudinal beam 16, so that the longitudinal beam 16 can be pushed to move on the first sliding plate 23. The top parts of the two longitudinal beams 16 are connected, and the first vertical pushing jack 22 abuts against the longitudinal beams 16 and the capping beam 5, so that the longitudinal beams 16 can drive the first vertical pushing jack 22 and the capping beam 5 to move transversely under the action of the first horizontal pushing jack 21.
Referring to fig. 4, the second adjusting mechanism 3 includes a second horizontal pushing jack 31, a second vertical pushing jack 32, and a second sliding plate 33; the second sliding plate 33 is arranged on the top of the bent cap 5; the second vertical pushing jack 32 is arranged at the top of the second sliding plate 33 and acts on the box girder 4; the second horizontal jacking jack 31 is arranged on top of the second skid plate 33 and acts on a pad 34 located between the lid beam 5 and the box beam 4.
The second adjusting mechanism 3 functions in the same manner as the first adjusting mechanism 2. In general, the vertical offset of the capping beam 5 is adjusted only by the first vertical jacking jack 22 of the first adjusting mechanism 2. The second vertical pushing jack 32 is arranged between the cover beam 5 and the box beam 4, the second vertical pushing jack 32 pushes up the box beam 4 for replacing the support of the box beam 4, and when the second horizontal pushing jack 31 is beneficial to acting, the cover beam 5 can be moved more easily. The second horizontal pushing jack 31 is arranged above the second sliding plate 33 and acts on the cushion stone 34, and the reaction force of the cushion stone 34 drives the cover beam 5 to move transversely.
The construction method of the existing bridge pier stud deviation rectifying construction system comprises the following steps:
building a supporting mechanism 1: excavating a short pile foundation 11, inserting a steel pipe column 12 into the short pile foundation 11, pouring concrete into the steel pipe column 12, and welding a cross brace 13, an inclined brace 14, a cross beam 15 and a longitudinal beam 16 after the strength is met;
mounting the first adjusting mechanism 2: the bottom of the first sliding plate 23 is welded with the cross beam 15, and the two longitudinal beams 16 are placed on the first sliding plate 23;
the first vertical pushing jacks 22 are respectively arranged at two ends of the longitudinal beam 16 and upwards abut against the cover beam 5;
the first horizontal pushing jack 21 is arranged on the cross beam 15 and transversely acts on the longitudinal beam 16; mounting the second adjusting mechanism 3: the second sliding plate 33 is arranged on the top of the bent cap 5; the second vertical pushing jack 32 is connected to the second sliding plate 33 and abuts against the box girder 4 upwards; the second horizontal pushing jack 31 is arranged on the second sliding plate 33 and transversely acts on the pad stone 34;
and (3) removing part of the pier stud 6: chiseling off the pier stud 6 below the marked line and the original expanded foundation to enable the lower part of the pier stud 6 to be suspended and supported by the supporting mechanism 1;
vertical adjustment: starting the first vertical pushing jack 22 and correcting the vertical deviation of the bent cap 5;
transverse adjustment: starting the first horizontal pushing jack 21 and the second horizontal pushing jack 31, and correcting the transverse deviation of the bent cap 5;
and (3) pouring a new pile foundation 8 and a new bearing platform 7: and pouring a new pile foundation 8, pouring a new bearing platform 7 on the new pile foundation 8, and pouring the pier stud 6 on the new bearing platform 7 until the pier stud is connected with the rest pier studs 6.
The specific embodiment is as follows: the upper structure of a certain bridge at a high speed is a box girder 4 which is formed by simply supporting 2-joint 5-hole 20-meter prestressed concrete and then is continuous, the lower structure is a single-column pier 6, and the gravity type abutment and the pier foundation are all enlarged foundations.
The phenomenon of upward arching of the bridge deck is caused by geological related disasters caused by extreme weather. The left and right sides of the pier are totally 11 pier stud 6 upbows through field inspection, the maximum upbow is 309mm higher than the designed elevation, and meanwhile, part of the pier studs 6 have transverse deviation, and the maximum deviation is 88 mm. In combination with the above diseases, it is urgently needed to perform bridge deck linear recovery processing on the bridge.
The specific construction method comprises the following steps: and determining that the manhole digging hole phi 800 stub foundation 11 is 8 meters deep through the latest drilling data near the pier stud 6. Inserting a phi 400 steel pipe column 12 and pouring C40 concrete into the steel pipe column 12, only pouring a short pile foundation 11 part, backfilling the rest part with clay, installing the supporting mechanism 1 after the strength meets the requirement, and installing a horizontal cross brace 13 and a crossed inclined brace 14 by adopting 16a channel steel to ensure the stability of the supporting mechanism 1. And 3 pieces of 40b I-shaped steel are welded on the top of the steel pipe column 12 side by side to form the cross beam 15. The first sliding plate 23 is welded on the cross beam 15, and 4 pieces of side-by-side I-steel which prevent 63b are arranged on the first sliding plate 23 and are used as longitudinal beams 16. One side of the beam 15 is provided with a first horizontal jacking jack 21 of 150T. The first vertical jacking jack 22 of 150T is mounted on the stringer 16.
Two 150T second vertical pushing jacks 32 are arranged at the bottom of each box girder 4, and 150T second horizontal pushing jacks 31 are arranged beside the three box girders 4.
The first vertical jacking jack 22 applies pressure to pre-jack. The vertical pushing jacks are guaranteed to completely play a supporting role, and dial indicators are arranged beside the jacks to observe the displacement change of the bridge in time.
Finite element software is used for modeling calculation of a full bridge, a left-amplitude pier No. 8 is taken as an example, pier top counter force is 3146.4kN in a bridge forming state, pier top counter force after arching is 6680.8kN on the basis, after the left-amplitude pier No. 9 and 10 main beams are simultaneously jacked for 350mm, the maximum counter force of the pier No. 8 is reduced to 4150.4kN, the top cover beam 5 of the pier and 5 meters of the pier column 6 are considered, the dead weight of the top cover beam 5 and the rest part of the pier column 6 is (28.28+12.73) multiplied by 26 which is 1066.3kN, the total load counter force is 4150.4+1066.3 which is 5216.7kN and is smaller than the pre-pressing constant load 6000kN of a supporting system. Through calculation, the whole supporting system meets the stress requirement.
And (5) remaining the pier stud 6 which is 5m below the bent cap 5, sawing the rest pier studs 6 by using a rope saw, and manually chiseling the enlarged foundation. The first horizontal pushing jack 21 and the second horizontal pushing jack 31 are used for jacking the damaged bent cap 5 with the transverse deviation of the pier stud 6 exceeding 30mm, so that the superposition of the axis of the newly poured pier stud 6, the axis of the bent cap 5 and the axis of the main beam is ensured, and the generation of additional lateral overturning moment is avoided. Adjust pier straightness and vertical elevation that hangs down with vertical recovery system, use No. 8 piers on the left side as an example, the adjustment divides into the tertiary, the first order: the left side is adjusted down by 11.3mm, and the right side is adjusted down by 11.3 mm; and a second stage: the right side is adjusted down by 10 mm; the right side of the third stage was down-regulated by 8 mm.
After the offset disease is eliminated, a new pile foundation 8 is poured, the pile length is 15m, the pile spacing is 4m, and a new bearing platform 7 is poured, the height is 182.5m, the transverse width is 6.5m, and the longitudinal width is 2.5 m. And a new pier stud 6 is poured to be connected with the original pier stud 6. And transferring all the constant load of the original pier stud 6 to the pier stud 6 by the supporting mechanism 1, dismantling the supporting mechanism 1, and dismantling the first adjusting mechanism 2 and the second adjusting mechanism 3.
The embodiment can restrict traffic without interrupting the traffic in the construction process, thereby reducing the economic loss of the operation road.
The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure.
Claims (5)
1. An existing bridge pier stud deviation rectifying construction system is characterized by comprising a supporting mechanism (1), a first adjusting mechanism (2) and a second adjusting mechanism (3);
the supporting mechanism (1) is arranged on two sides of the pier stud (6), the bottom of the supporting mechanism (1) is connected to a foundation, and the top of the supporting mechanism (1) supports the first adjusting mechanism (2);
the bottom of the first adjusting mechanism (2) is connected to the top of the supporting mechanism (1); the top of the first adjusting mechanism (2) is connected with a cover beam (5) and can adjust the vertical offset of the cover beam (5);
the second adjusting mechanism (3) is arranged between the cover beam (5) and the box beam (4) and used for supporting the box beam (4) and coacting with the first adjusting mechanism (2) to adjust the transverse offset of the cover beam (5).
2. The existing bridge pier column deviation rectifying construction system according to claim 1, wherein the supporting mechanism (1) comprises a short pile foundation (11), a steel pipe column (12), a cross beam (15) and a longitudinal beam (16);
the bottoms of the short pile foundations (11) are connected with a foundation, the steel pipe columns (12) are connected to the tops of the short pile foundations (11), and the lower ends of the steel pipe columns (12) are embedded into the short pile foundations (11);
the cross beam (15) is connected to the top of the steel pipe column (12) on the same side of the pier column (6);
the longitudinal beams (16) are connected to the tops of the cross beams (15), and the tops of the longitudinal beams (16) are connected.
3. The existing bridge pier column deviation rectifying construction system according to claim 2, wherein the supporting mechanism (1) further comprises a cross brace (13) and an inclined brace (14);
a plurality of cross braces (13) are arranged in the vertical direction of the steel pipe column (12), and two ends of each cross brace (13) are respectively connected to the steel pipe column (12) adjacent to each other in the vertical direction;
two ends of the plurality of inclined struts (14) are respectively connected to the steel pipe columns (12) which are adjacent in the vertical direction and are connected with the transverse struts (13) which are adjacent.
4. The existing bridge pier column deviation rectifying construction system according to claim 2, wherein the first adjusting mechanism (2) comprises a first horizontal pushing jack (21), a first vertical pushing jack (22) and a first sliding plate (23);
the first sliding plate (23) is arranged between the cross beam (15) and the longitudinal beam (16);
the first horizontal pushing jack (21) is arranged at the top of the cross beam (15) and acts on the longitudinal beam (16);
the first vertical pushing jacks (22) are sequentially arranged at the tops of the longitudinal beams (16) and act on the bottoms of the cover beams (5).
5. The existing bridge pier column deviation rectifying construction system according to claim 1, wherein the second adjusting mechanism (3) comprises a second horizontal pushing jack (31), a second vertical pushing jack (32) and a second sliding plate (33);
the second sliding plate (33) is arranged on the top of the cover beam (5);
the second vertical pushing jack (32) is arranged at the top of the second sliding plate (33) and acts on the box girder (4);
the second horizontal pushing jack (31) is arranged at the top of the second sliding plate (33) and acts on a cushion stone (34) between the cover beam (5) and the box beam (4).
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| CN113832875A (en) * | 2021-11-04 | 2021-12-24 | 陕西省交通规划设计研究院有限公司 | Existing bridge pier column deviation rectifying construction system and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113832875A (en) * | 2021-11-04 | 2021-12-24 | 陕西省交通规划设计研究院有限公司 | Existing bridge pier column deviation rectifying construction system and construction method thereof |
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