CN209584855U - Bridge major diameter precast concrete tubular column basis - Google Patents
Bridge major diameter precast concrete tubular column basis Download PDFInfo
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- CN209584855U CN209584855U CN201920038998.2U CN201920038998U CN209584855U CN 209584855 U CN209584855 U CN 209584855U CN 201920038998 U CN201920038998 U CN 201920038998U CN 209584855 U CN209584855 U CN 209584855U
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Abstract
The utility model discloses bridge major diameter precast concrete tubular column bases, it include: tubular column main body, it includes sequentially connected tubing string bottom section, more standard tubing string section and tubing string top section from bottom to up, the tubular column main body is the tube-in-tube structure of inner hollow and is vertically positioned in soil layer that the tubular column main body bottom is sealed by bottom concrete；Linkage section is located on soil layer and is solid construction, and the linkage section lower end connecting tube capital section, upper end are directly connected to pier stud.Cushion cap is not needed after the completion of the construction of the utility model tube caisson foudations, reduces cost, shortens the construction period, prefabrication and assembly construction degree is high, is with a wide range of applications.
Description
Technical field
The utility model relates to bridge foundation construction technical field of structures.More specifically, the utility model relates to be used for
Land bridge major diameter precast concrete tubular column basis.
Background technique
With China's rapid economic development, Urban Transportation demand is increased rapidly, and municipal bridge is due to can be significantly
Traffic ability is improved, urban congestion is alleviated, using more extensively in urban construction.The substructure of municipal bridge generallys use
The structure type of " cast-in-situ bored pile+cushion cap+pier stud ", bored concrete pile has mechanization of operation, easy for construction；Steel reinforcement cage and concrete
Can concentrated processing, dispatching, operation is convenient；The advantages that speed of application is fast, technical maturity, work progress is safe and reliable, at present in bridge
Beam is widely used in basis.
Currently, there are mainly two types of the common construction technologies of bored concrete pile.First method is mud off method, is set by drilling machine
Standby (impact drill, abrasion drill, churning driven etc.) pore-forming concrete perfusion and pile on the spot.It is protected for the hole that prevents from collapsing with mud when drilling
Wall.It is recycled by mud and excludes boring mud soil bits, borehole cleaning is after reaching projected depth with round bottom sediment.Its work progress includes smooth
Place, slurrying, embedded casing, rigging up and position, drilling and forming hole, borehole cleaning and inspection hole, installation steel reinforcement cage, pour it is underwater
Concrete.Large diameter bored pile is mostly used this construction technology in the heavy constructions such as skyscraper and bridge at present, and stake diameter is more
In 2.5m or less.Second method is full-sleeve construction method, is mainly characterized by using full-sleeve retaining wall, work progress is not necessarily to mud
Slurry and borehole cleaning, reduce the frictional resistance between steel sleeve and soil layer using the shake of agitating device, are pressed into when shaking, utilize simultaneously
Punching grab bucket, which is excavated, takes soil.General work progress is: smooth location, rigging up, set pipe construction, drilling and forming hole, installation steel reinforcement cage,
Casting concrete, checks pile quality at drawing casing.
But the structure type of Urban Bridge substructure " cast-in-situ bored pile+cushion cap+pier stud ", stratum deformation adaptability
Difference, appearance effects are serious after roadbed subsidence, passage space under the big influence bridge of suspended deck structure size, and basis is existed using bored concrete pile
The problems such as structure construction consumption of materials is big, and speed of fulfiling hole is slow, and the construction period is long, and construction quality control is difficult；Cast-in-situ bored pile
There is also certain defect, construction slurry and boring mud vegetation soil, surface water and groundwaters to surrounding to cause seriously for construction technology
It pollutes, there are larger construction noise in construction, underwater concreting quality is difficult to ensure, prefabrication and assembly construction degree is low etc..
Utility model content
One purpose of the utility model is to provide bridge major diameter precast concrete tubular column basis, passes through prefabricated major diameter
Tubing string, scene cooperate small-sized strand suction dredging plant to complete the fabricated construction of bridge foundation, are not required to after construction using static pressure method
Cushion cap is wanted, cost is reduced, shortens the construction period, prefabrication and assembly construction degree is high, is with a wide range of applications.
In order to realize these purposes and other advantages according to the present utility model, bridge major diameter precast concrete is provided
Tube caisson foudations, comprising: tubular column main body comprising sequentially connected tubing string bottom section, more standard tubing string section and tubing string from bottom to up
Section is pushed up, the tubular column main body is the tube-in-tube structure of inner hollow and is vertically positioned in soil layer that the tubular column main body bottom passes through envelope
Base concrete sealing；Linkage section is located on soil layer and is solid construction, the linkage section lower end connecting tube capital section, upper end
It is directly connected to pier stud.
Preferably, the diameter of the tubular column main body is 2~4m, and wall thickness is 25~35cm, the bottom concrete height
For 2~5m.
Preferably, tubing string bottom section inside is provided with the blade foot with blade foot tyre tread, the blade foot outer cladding blade foot steel
Plate.
Preferably, the connection between the tubing string bottom section, more standard tubing string section and tubing string top section is using welding, flange
It is bolted or mechanical splice connects.
Preferably, the tubular column main body is concrete structure and the double-deck stiffener is arranged in inside concrete.
The utility model is include at least the following beneficial effects:
(1) major diameter precast concrete pipe column structure is directly connect with pier stud using no cushion cap form, is become to stratum settlement
Shape is adaptable, and passage space is big under bridge；
(2) precast concrete tubular column basis diameter is big, increase side frictional resistance forced area, can give full play to side friction and
End resistance promotes basic vertical bearing capacity load, while increasing the stability of tube caisson foudations；
(3) large diameter pipe column foundation arranges double steel bar, improves concrete strength, horizontal bearing capacity is big, and anti-bending strength is strong；
(4) tubing string use prefabrication, tubing string quality is secure, and after foundation construction during on-site construction without maintenance when
Between, the completion time of project can be shortened, prefabrication and assembly construction degree is high；
(5) precast concrete tubular column uses hollow thin-wall structure, saves steel and cement, and cost is lower, economic benefit and
Social benefit is obvious, is with a wide range of applications.
The further advantage, target and feature of the utility model will be partially reflected by the following instructions, and part will also pass through
Research and practice to the utility model and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model tube caisson foudations.
Description of symbols:
1, tubing string bottom section, 2, standard pipe shell of column, 3, tubing string top section, 4, blade foot steel plate, 5, bottom concrete, 6, linkage section,
7, pier stud, 8, bent cap, 9, horizon d, 10, sandy soils, 11, Soft Soil Layer.
Specific embodiment
The following describes the utility model in further detail with reference to the accompanying drawings, to enable those skilled in the art referring to explanation
Book text can be implemented accordingly.
It should be noted that experimental method described in following embodiments is unless otherwise specified conventional method, institute
Reagent and material are stated, unless otherwise specified, is commercially obtained；In the description of the present invention, term " transverse direction ",
The instruction such as " longitudinal direction ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside"
Orientation or positional relationship be to be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the utility model and letter
Change description, be not the device of indication or suggestion meaning or element must have a particular orientation, constructed with specific orientation and
Operation, therefore should not be understood as limiting the present invention.
As shown in Figure 1, the utility model provides a kind of bridge major diameter precast concrete tubular column basis, comprising: tubing string sheet
Body comprising sequentially connected tubing string bottom section 1, more standard tubing string section 2 and tubing string top section 3 from bottom to up, the tubular column main body
For inner hollow tube-in-tube structure and be vertically positioned in soil layer, the tubular column main body bottom is sealed by bottom concrete 5；Connection
Section 6 is located on soil layer and is solid construction, and 6 lower end connecting tube capital of the linkage section section 3, upper end are directly connected to pier stud 7.
In the above-mentioned technical solutions, existing tube caisson foudations are grouped piles cap structure, and more concrete cast-in-situ bored concrete piles need
Pier stud 7 is connected by cushion cap, pier stud 7 reconnects bent cap 8, and in addition existing cast-in-situ concrete poured column diameter is generally in 2.5m
Hereinafter, being unable to reach the performance for needing to carry in certain constructions, therefore grouped piles cap structure needs cushion cap as connection.And this
Utility model passes through the structure type of major diameter precast concrete tubular column, and tubular column main body is divided into multi-segmental, tubing string bottom section 1, more piece
Standard pipe shell of column 2 and tubing string top 3 prefabricated in advance, assembled in situ of section, can not only reach fabricated construction, improve the effect of site operation
Rate, moreover it is possible to which realization is directly connected to pier stud 7, using no cushion cap form, expands the passage space under bridge floor, in addition tubular column main body uses
Steel and cement consumption are greatly saved in hollow thin-wall structure, and cost reduces, and economic benefit is obvious.Linkage section 6 is solid cast-in-place
Concrete structure, using UHPC structure, for connecting the pier stud 7 of tubular column main body and top.
In another technical solution, the diameter of the tubular column main body is 2~4m, and wall thickness is 25~35cm, the back cover
5 height of concrete is 2~5m.According to requirement for bearing capacity come the diameter and wall thickness of reasonable set tubular column main body, according further to specific
Soil property situation reasonable arrangement bottom concrete 5 height.
In another technical solution, section 1 inside in the tubing string bottom is provided with the blade foot with blade foot tyre tread, outside the blade foot
Coat blade foot steel plate 4.Blade foot is arranged in tubing string bottom section 1, and it is blade foot tyre tread that blade foot, which divides into horizontal support surface, and the above are swords for blade foot tyre tread
Foot inclined-plane is each provided at prefabricated 1 inside of tubing string bottom section, while reinforcing blade foot using blade foot steel plate 4 to prevent blade foot thread damages.
Connection in another technical solution, between the tubing string bottom section 1, more standard tubing string section 2 and tubing string top section 3
Using welding, flange bolt connection or mechanical splice connection.The connection structure of use must guarantee pile quality, it is ensured that structure is whole
Property and shear behavior etc. meet design requirement.In addition mechanical splice can be engaging type connector, Snap-in joint, grout sleeve
Connector, nipple, I-shaped type joint etc..
In another technical solution, the tubular column main body is concrete structure and the double-deck reinforcement steel of inside concrete setting
Muscle.Tubular column main body two stage cultivation in prefabricated processing factory is prefabricated, and each segment inside concrete is respectively provided with double steel bar, improves mixed
Solidifying soil intensity, the horizontal bearing capacity and bending strength of tubing string segment.
The utility model also provides a kind of construction method on bridge major diameter precast concrete tubular column basis, including walks as follows
It is rapid:
S1: using non-drainage subsidence technique combination static pressure method sinking tubing string bottom section 1；Tubing string bottom section 1 uses non-drainage subsidence
Technique mainly passes through load static pressure in soft layer, and cooperation twists suction dredging plant, it is ensured that tubing string bottom 1 sinking watching of section is steady,
It is balanced；It is dredged adjustment when tubing string sinking watching glances off by twisting suction equipment；Water level in digging process tubing string is controlled, is kept
Inside and outside water level meets design requirement；When section 1 sinking in tubular pole bottom is obstructed, reinforces management of dredging in stake according to the actual situation, adjust simultaneously
Water-head inside and outside whole stake, after tubular pole bottom section 1 sinks to specified absolute altitude, removal static pressure load；Before step S1, first needs are applied
The tubular column main body of work carries out merogenesis, then in precast plant to the tubing string bottom section 1, more standard tubing string section 2 and tubing string top section 3 of merogenesis
It carries out prefabricated, finally transports to construction site；
S2: first segment standard pipe shell of column 2 is connect with tubing string bottom section 1, equally uses non-drainage subsidence technique combination static pressure
Method sinking first segment standard pipe shell of column 2；When tubing string bottom section 1 sinks to design height, on-site hoisting first segment standard pipe shell of column 2,
Structure connection is carried out with tubing string bottom section 1；After the completion of tubing string segment connects height, continue to load static pressure on first segment standard pipe shell of column 2；
S3: the quasi- tubing string section 2 of the second feast-brand mark is successively connected on first segment standard pipe shell of column 2 and uses non-drainage subsidence technique
In conjunction with the static pressure method sinking quasi- tubing string section 2 of the second feast-brand mark, the quasi- tubing string section 2 of third feast-brand mark is connected simultaneously in the quasi- tubing string section 2 of the second feast-brand mark
Using the quasi- tubing string section 2...... of non-drainage subsidence technique combination static pressure method sinking third feast-brand mark in the quasi- tubing string section 2 of N-1 feast-brand mark
Connect the quasi- tubing string section 2 of N feast-brand mark and using the non-drainage subsidence technique combination static pressure method sinking quasi- tubing string section 2 of N feast-brand mark；
S4: under quasi- 2 upper connector capital of the tubing string section section 3 of N feast-brand mark and using non-drainage subsidence technique combination static pressure method
Immersed tube capital section 3；More standard tubing string section 2, the connection of tubing string top section 3 are consistent with 1 sinking of section of tubing string bottom with subsidence process, mainly
Using suction dredging plant is twisted, the local sand for excavating tube caisson foudations leading portion reduces tubing string sinking side friction and end resistance, leads to
Tubing string self weight and static pressure load are crossed to ensure the steady sinking of tubing string segment, sandy soils 10 and Soft Soil Layer 11 as shown in Figure 1；Pipe
After column bottom section 1 enters lithosphere, in horizon d 9 as shown in Figure 1, injection auxiliary is carried out using weight and is sunk, it is ensured that meets design
Absolute altitude and pile penetration requirement；To prevent from being destroyed at the top of tubing string by hammering, dedicated UHPC sections of the connection on tubing string top, after the completion of tubular pole
It removes；
S5: at tubing string bottom, section 1 carries out the construction of bottom concrete 5；After tubing string bottom absolute altitude meets design requirement, tubing string is removed
The strand suction device at bottom；Concreting conduit is installed, tube caisson foudations bottom concrete 5 is poured, improves the end resistance of tube caisson foudations
Power.
S6: construction linkage section 6 installs end template in tubing string top section 3 and binds 6 reinforcing bar of linkage section, then installation connection
6 templates of section, are finally attached 6 cast-in-place construction of section；Pass through the bed die under the linkage section 6 of pre-embedded bolt installation foundation and pier stud 7
The reinforcing bar of linkage section 6 in tubing string top section 3 is arranged according to design requirement and is formed, bind linkage section without recycling by plate, end template
6 reinforcing bar；6 template of linkage section is installed, the concrete of 7 linkage section 6 of tubular column main body and pier stud is poured；Tubular column main body and pier stud 7 connect
After the completion of connecing the construction of section 6, construct into bridge pier column 7 and bent cap 8.
In conjunction with the municipal viaduct foundation design condition in Wuhan, the tube caisson foudations and cast-in-plase pile of the utility model reach
The overall performances such as bearing capacity it is the same when, concrete amount comparison is as shown in the table:
Under the conditions of general geology, the globalities such as bearing capacity that the tube caisson foudations and cast-in-plase pile of the utility model reach
When can be the same, single earthwork be caused to increase although the prefabricated tube caisson foudations of the utility model are relatively large in diameter, site operation
Without carrying out, basis is poured and maintenance construction, construction efficiency are substantially improved.
It is not only in the description and the implementation although the embodiments of the present invention have been disclosed as above
Listed utilization, it can be applied to various fields suitable for the present invention completely, for those skilled in the art,
Other modifications may be easily implemented, therefore without departing from the general concept defined in the claims and the equivalent scope, this reality
It is not limited to specific details and legend shown and described herein with novel.
Claims (5)
1. bridge major diameter precast concrete tubular column basis characterized by comprising
Tubular column main body comprising sequentially connected tubing string bottom section, more standard tubing string section and tubing string top section from bottom to up, the pipe
Column ontology is the tube-in-tube structure of inner hollow and is vertically positioned in soil layer that the tubular column main body bottom is close by bottom concrete
Envelope；
Linkage section is located on soil layer and is solid construction, and the linkage section lower end connecting tube capital section, upper end are directly connected to pier
Column.
2. bridge major diameter precast concrete tubular column basis as described in claim 1, which is characterized in that the tubular column main body
Diameter is 2~4m, and wall thickness is 25~35cm, and the bottom concrete height is 2~5m.
3. bridge major diameter precast concrete tubular column basis as described in claim 1, which is characterized in that in the tubing string bottom section
Side is provided with the blade foot with blade foot tyre tread, the blade foot outer cladding blade foot steel plate.
4. bridge major diameter precast concrete tubular column basis as described in claim 1, which is characterized in that the tubing string bottom section,
Connection between more standard tubing string section and tubing string top section is using welding, flange bolt connection or mechanical splice connection.
5. bridge major diameter precast concrete tubular column as described in claim 1 basis, which is characterized in that the tubular column main body is
The double-deck stiffener is arranged in concrete structure and inside concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920038998.2U CN209584855U (en) | 2019-01-10 | 2019-01-10 | Bridge major diameter precast concrete tubular column basis |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920038998.2U CN209584855U (en) | 2019-01-10 | 2019-01-10 | Bridge major diameter precast concrete tubular column basis |
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| CN209584855U true CN209584855U (en) | 2019-11-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989346A (en) * | 2019-01-10 | 2019-07-09 | 中交第二航务工程局有限公司 | Bridge major diameter precast concrete tubular column basis and its construction method |
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2019
- 2019-01-10 CN CN201920038998.2U patent/CN209584855U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989346A (en) * | 2019-01-10 | 2019-07-09 | 中交第二航务工程局有限公司 | Bridge major diameter precast concrete tubular column basis and its construction method |
| CN109989346B (en) * | 2019-01-10 | 2023-11-10 | 中交第二航务工程局有限公司 | Bridge large-diameter precast concrete tubular column foundation and construction method thereof |
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