CN212896448U - Scour prevention is bridge pile foundation structure under water - Google Patents
Scour prevention is bridge pile foundation structure under water Download PDFInfo
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- CN212896448U CN212896448U CN202020546479.XU CN202020546479U CN212896448U CN 212896448 U CN212896448 U CN 212896448U CN 202020546479 U CN202020546479 U CN 202020546479U CN 212896448 U CN212896448 U CN 212896448U
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Abstract
The utility model discloses a scour prevention is bridge pile foundation structure under water, through the original permanent steel of bridge pile foundation structure upper portion concrete outside design under water protects a section of thick bamboo, the steel protects a section of thick bamboo and stretches into 1m below the maximum washout line of riverbed from the pile foundation top, and a steel protects a parcel pile foundation concrete, resists the river and erodees. Set up the stress steel reinforcement skeleton of connecting reinforcement with the pile foundation and weld an organic whole with a steel casing, the stake hole takes shape the back, and a steel casing and steel reinforcement cage are installed together, then the pouring pile foundation concrete, form the bridge pile foundation structure under water of a scour prevention. The utility model discloses simple structure, construction convenience, safe and reliable, economy and environmental protection benefit are showing, can be in bridge pile foundation structure technical field extensive popularization and application under water.
Description
Technical Field
The utility model relates to a scour prevention bridge pile foundation structure under water belongs to the technical field of bridge pile foundation structure.
Background
With the high-speed development of highway and railway construction in China, the coverage area of a road network is gradually promoted to a remote mountain area, the topography and the topography of the mountain area are complex, the proportion of bridges and tunnels is high, the bridge is mostly positioned in rivers, deep ditches and canyon areas, and the condition that the bridge pile foundations are positioned under water is common and more. Under the conditions of shallow water depth, gentle water flow, short pile position distance from the bank side and the like, the pile foundation is mainly constructed by an island-building cofferdam method, and the underwater pile foundations meeting the conditions are large in quantity and proportion. The size and the length of stake footpath are generally confirmed according to load size and geological conditions to the bridge pile foundation, mainly bear the load effect together at pile foundation inside configuration atress owner muscle and spiral stirrup and concrete, interconnect between the reinforcing bar forms a framework of steel reinforcement, atress owner muscle has certain distance apart from pile foundation concrete surface, this part concrete is as the protective layer of main muscle, do not let the reinforcing bar receive the corruption in the use, guarantee the bearing capacity of reinforcing bar, guarantee the safety of bridge pile foundation structure, guarantee the safety of bridge structure. During construction of the underwater pile foundation island-building cofferdam, the main process is that firstly, a lofting and aligning position is measured, then, the island-building cofferdam is built to create an underwater pile foundation construction platform, holes are drilled according to the pile top elevation, a reinforcement cage is installed, and underwater concrete is poured.
The existing pile foundation design generally determines the elevation of the pile top according to factors such as a mapped topographic map, water level elevation and construction during mapping, and determines the size and the length of the pile diameter according to the load size, geological conditions and the like. From the aspects of the bearing capacity of the pile foundation, the strength of the pile foundation and the like, the underwater pile foundation can meet the requirements under the combination of the standard and specified load effect.
Bridge pile foundation is when the design, mainly bears the load effect together at pile foundation internal configuration atress owner muscle and spiral stirrup and concrete, interconnect between the reinforcing bar forms a framework of steel reinforcement, atress owner muscle has certain distance apart from pile foundation concrete surface, this part concrete is as the protective layer of owner muscle, guarantees that the reinforcing bar does not receive the corruption in the use, guarantees the bearing capacity of reinforcing bar, guarantees the safety of bridge pile foundation structure, guarantees bridge structures's safety. After the built bridge is used for a certain time, the phenomena of pile foundation leakage and pile foundation concrete peeling pile foundation stressed reinforcing steel bar leakage are common in the underwater bridge pile foundation structure, the reinforcing steel bar leakage is corroded, the bearing capacity is reduced, the safety of the bridge structure is influenced, and huge potential safety hazards are formed for vehicles and pedestrians.
Mountain area deep valley river department topography and landform are complicated, and topographic structure is undulant great, and is less in the dry season water yield, but in rainy season the torrential rain comes temporarily, and rivers suddenly, rivers torrential rush, and the riverbed is washed easily and is cut down, leads to the pile foundation under water to leak outward. When underwater concrete is poured, the concrete is adhered to soil and stones in the surrounding earth-rock cofferdam to a certain extent, after the construction is completed and the earth-rock cofferdam is used for a certain time, the earth-rock cofferdam is cut down by water flow scouring, pile foundation concrete is easy to peel off when the water flow scouring cofferdam is used, stressed steel bars of a pile foundation leak outwards, the bearing capacity of the pile foundation is reduced if the consequence is light, and the whole bridge is collapsed if the consequence is heavy. Meanwhile, the appearance of the pile foundation is also influenced by leakage and leakage of the stressed main ribs.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the bridge pile foundation under water under the rivers washout condition, the pile foundation leaks outward and pile foundation atress reinforcing bar leaks outward, and pile foundation bearing capacity reduces, produces great potential safety hazard to bridge overall structure, influences the life scheduling problem of bridge structures, provides a scour protection bridge pile foundation structure under water to overcome prior art's not enough, guarantee the safe use of bridge.
The utility model discloses a realize like this:
the utility model discloses a pile foundation concrete is wrapped up in to the steel protects a section of thick bamboo from pile foundation top 1m under the biggest scour line of riverbed is stretched into in original bridge pile foundation structure upper portion concrete outside design permanent steel under water, steel and protect a section of thick bamboo, resists river and erode. Set up the stress steel reinforcement skeleton of connecting reinforcement with the pile foundation and weld an organic whole with a steel casing, the stake hole takes shape the back, and a steel casing and steel reinforcement cage are installed together, then the pouring pile foundation concrete, form the bridge pile foundation structure under water of a scour prevention.
The stressed steel bar framework comprises stressed main bars, stiffening hoops and spiral hoops; the stressed main reinforcement and the spiral stirrup are welded into a whole, the stiffening hoops and the stressed main reinforcement are welded into an integrated reinforcement framework in the inner side, the connecting reinforcement is welded on the spiral stirrup when the reinforcement framework is manufactured, and the outer-pasting steel casing is welded on the connecting reinforcement to form reliable connection. The pile foundation concrete adopts the traditional underwater concrete material, and the externally-adhered steel pile casing adopts the traditional anti-corrosion steel; and pouring the pile foundation concrete after the steel reinforcement framework and the externally-adhered steel pile casing are installed. The number and size of the connecting steel bars need to be ensured to bear the gravity of the externally attached steel casing.
Compared with the prior art, the utility model: the existing part of the underwater pile foundations of the bridge can generate diseases such as pile foundation leakage, pile foundation reinforcement leakage and the like under river flushing, the attractiveness of the bridge is influenced, and meanwhile, the safety of the bridge in the operation period is also influenced. After the pile foundation produced the reinforcing bar disease that leaks under the water of bridge, current solution mainly adopts various ways to consolidate, if remove the rust to the reinforcing bar, then plant the muscle on the pile foundation and fill concrete etc. again, later stage reinforcement has certain damage to the main structure, and the construction is troublesome, and the cost is higher, and later stage use still can continue to appear toward the washing away of pile foundation lower part, produces new disease. And the utility model discloses a pile foundation concrete is wrapped up in to the steel protects a section of thick bamboo in original bridge pile foundation structure upper portion concrete outside design permanent under water, and the river erodees is resisted to the steel. The steel reinforcement framework of the stressed steel bar and the steel casing are welded into a whole by the connecting steel bar, so that the underwater bridge pile foundation structure with the scour prevention is formed. The defects of pile leakage, stress reinforcement leakage and the like generated by an underwater bridge pile foundation structure are avoided, the attractiveness of the service life is guaranteed, the safety of the bridge structure in the operation period is guaranteed, the construction difficulty is low, and the manufacturing cost is low. Compared with the technology of repairing after the diseases appear, the hidden danger of the diseases is eliminated in the bridge design stage, the repeated construction after the diseases appear is avoided, the resources are saved, the investment is reduced, the construction of an environment-friendly bridge is facilitated, and the economic and social benefits are higher.
The utility model discloses simple structure, construction convenience, safe and reliable, economy and environmental protection benefit are showing, can be in bridge pile foundation structure technical field extensive popularization and application under water.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic cross-sectional view taken along line I-I of FIG. 1;
the labels in the figures are: 1-bearing platform, 2-pile foundation top, 3-earth-rock cofferdam top, 4-external steel casing, 5-connecting steel bar, 6-riverbed maximum flushing line, 7-pile foundation concrete boundary, 8-pile foundation concrete, 9-pile foundation bottom, 10-stressed main rib, 11-stiffening hoop and 12-spiral hoop.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may 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. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model discloses an implement like this:
as shown in fig. 1-2, the utility model discloses an scour prevention is bridge pile foundation structure under water, including pile foundation concrete 8, the hoop 11 of putting more energy into, spiral stirrup 12, connecting reinforcement 5, paste the steel outward and protect a section of thick bamboo 4, atress owner muscle 10. The stressed main reinforcement 10 and the spiral stirrup 12 are welded into a whole, the stiffening hoops 11 and the stressed main reinforcement 10 are welded into an integrated reinforcement framework inside, the connecting reinforcement 5 is welded on the spiral stirrup 12 when the reinforcement framework is manufactured, and the outer steel protection cylinder 4 is welded on the connecting reinforcement 5 to form reliable connection. And after the pile hole is finished, the steel reinforcement framework and the externally attached steel casing 4 are installed, and the pile foundation concrete 8 is poured.
By adopting the technical scheme, the defects of pile leakage, stress reinforcement leakage and the like generated in the operation period of the underwater bridge pile foundation structure are avoided, the attractiveness in the service life is ensured, the safety of the bridge structure in the operation period is also ensured, the construction difficulty is smaller, and the manufacturing cost is lower. Compared with the technology of repairing after the diseases appear, the hidden danger of the diseases is eliminated in the bridge design stage, the repeated construction after the diseases appear is avoided, the resources are saved, the investment is reduced, the construction of an environment-friendly bridge is facilitated, and the economic and social benefits are higher.
The construction method of the present invention is described below with reference to fig. 1:
as shown in the attached figure 1, the utility model is implemented mainly according to the following steps:
1) and preparing, measuring and lofting on site, and determining the position.
2) And cofferdam and island building are carried out, the elevation of the construction platform is determined, and the construction platform is filled to the top 3 of the earth-rock cofferdam.
3) And (5) re-measuring the position of the pile foundation, positioning the pile driver in place and constructing a pile hole.
4) And manufacturing a stressed main reinforcement 10, a stiffening hoop 11 and a spiral stirrup 12, and welding the stressed main reinforcement, the stiffening hoop and the spiral stirrup together to form the steel reinforcement framework.
5) And manufacturing connecting steel bars 5 and an outer steel casing 4, welding the connecting steel bars and the steel reinforcement framework together, installing the outer steel casing 4 in place in a pile foundation hole site, and extending the length of the outer steel casing 4 to 1m below the maximum flushing line 6 of the riverbed.
6) And pouring pile foundation concrete 8.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (4)
1. The utility model provides an scour prevention bridge pile foundation structure under water which characterized in that: a permanent outer steel pile casing (4) is arranged on the outer side of concrete at the upper part of an underwater bridge pile foundation structure, the outer steel pile casing (4) extends into the position 1m below the maximum flushing line (6) of a riverbed from the top (2) of the pile foundation, and the outer steel pile casing (4) wraps the pile foundation concrete (8) to resist river flushing.
2. The erosion-resistant underwater bridge pile foundation structure of claim 1, wherein: still include connecting reinforcement (5), this connecting reinforcement (5) protects a section of thick bamboo (4) welded connection as an organic whole with the outer steel of pasting with the atress steel skeleton of pile foundation.
3. The erosion-resistant underwater bridge pile foundation structure of claim 2, wherein: the pile foundation concrete (8) is poured by adopting an underwater concrete material; the external steel protective cylinder (4) is made of anti-corrosion steel.
4. The erosion-resistant underwater bridge pile foundation structure of claim 2, wherein: the stressed steel bar framework comprises stressed main bars (10), stiffening hoops (11) and spiral hoops (12); stress main muscle (10) with spiral stirrup (12) weld into whole, put more energy into hoop (11) with stress main muscle (10) weld into an organic whole reinforcing bar skeleton in the inboard, welding when making reinforcing bar skeleton connecting reinforcement (5) on spiral stirrup (12), paste steel outward and protect a section of thick bamboo (4) welding and form reliable connection on connecting reinforcement (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020546479.XU CN212896448U (en) | 2020-04-14 | 2020-04-14 | Scour prevention is bridge pile foundation structure under water |
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| CN202020546479.XU CN212896448U (en) | 2020-04-14 | 2020-04-14 | Scour prevention is bridge pile foundation structure under water |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113235635A (en) * | 2021-04-20 | 2021-08-10 | 东南大学 | Scour prevention pile foundation structure under water |
| CN115075236A (en) * | 2022-08-05 | 2022-09-20 | 四川省交通建设集团股份有限公司 | Special-shaped underwater section bridge pile foundation reinforcing structure and measuring construction method |
| CN115506338A (en) * | 2022-09-07 | 2022-12-23 | 苏州交通工程集团有限公司 | Construction process of bridge underwater cast-in-place bored pile |
-
2020
- 2020-04-14 CN CN202020546479.XU patent/CN212896448U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113235635A (en) * | 2021-04-20 | 2021-08-10 | 东南大学 | Scour prevention pile foundation structure under water |
| CN115075236A (en) * | 2022-08-05 | 2022-09-20 | 四川省交通建设集团股份有限公司 | Special-shaped underwater section bridge pile foundation reinforcing structure and measuring construction method |
| CN115506338A (en) * | 2022-09-07 | 2022-12-23 | 苏州交通工程集团有限公司 | Construction process of bridge underwater cast-in-place bored pile |
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