CN109944267A - Driving into type bridge deepwater open caisson and bridge foundation and construction method - Google Patents
Driving into type bridge deepwater open caisson and bridge foundation and construction method Download PDFInfo
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- CN109944267A CN109944267A CN201910211398.6A CN201910211398A CN109944267A CN 109944267 A CN109944267 A CN 109944267A CN 201910211398 A CN201910211398 A CN 201910211398A CN 109944267 A CN109944267 A CN 109944267A
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Abstract
The invention discloses a kind of driving into type bridge deepwater open caissons, it is related to bridge foundation construction technical field, including the cylindric borehole wall, its top preset has one for casting concrete and forms the cap region of cushion cap, the borehole wall includes multiple annular borehole wall units, and multiple borehole wall units stack gradually and are connected from bottom to top；Blade foot is set to the bottom end of the borehole wall；Compartment, it is set in the borehole wall, the top of compartment is contained in cap region, a back cover region for being used for casting concrete is formed between bottom end and blade foot, and compartment includes multiple protrusions, one end of multiple protrusions is connected with each other, and the other end is connected with the inner wall of the borehole wall, and multiple protrusions are arranged along the circumferencial direction interval of the borehole wall.Driving into type bridge deepwater open caisson of the invention squeeze into part be single-wall structure, with soil contact area it is small, and be full steel structure the advantages of, using driving into type scheme, it can effectively prevent the construction risk during conventional well sinking, and speed of application is fast, save the construction period.
Description
Technical field
The present invention relates to bridge foundation construction technical fields, and in particular to a kind of driving into type bridge deepwater open caisson and bridge base
Plinth and construction method.
Background technique
In recent years with the high speed development of China's infrastructure, large quantities of crossing-fiver bridges over strait come into being, and bridge base
Plinth due to the other factors such as geology, the hydrology of bridge location influence, the substructure construction of bridge is complex, due to traditional
Drilled pile construction drilling hole amount is more, and construction period is longer, at present the substructure of the general construction bridges by the way of steel open caisson,
Traditional steel open caisson construction, can be effective generally using mud, sinking, the construction of the live process progress steel open caisson for connecing high complexity is inhaled
Prevent the construction risk during conventional well sinking, and conventional open caisson construction is long in time limit, field operation amount is big, cause manpower,
The huge waste of wealth.
Summary of the invention
In view of the deficiencies in the prior art, the purpose of the present invention is to provide a kind of driving into type bridge deepwater open caisson and
Bridge foundation and construction method facilitate the construction risk during conventional well sinking, construction week using driving into type form of construction work
Phase is short, saves engineering resource.
To achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of driving into type bridge deepwater open caisson, comprising:
The cylindric borehole wall, top preset have one for casting concrete and form the cap region of cushion cap, the well
Wall includes multiple annular borehole wall units, and multiple borehole wall units stack gradually and are connected from bottom to top；
Blade foot is set to the bottom end of the borehole wall；
Compartment is set in the borehole wall, and the top of the compartment is contained in the cap region, bottom end and the sword
A back cover region for being used for casting concrete is formed between foot, and the compartment includes multiple protrusions, multiple protrusions
One end be connected with each other, the other end is connected with the inner wall of the borehole wall, and multiple protrusions are along the circumference side of the borehole wall
It is arranged to interval.
Based on the above technical solution, which further includes cylindric internal partition wall, the internal partition wall and the borehole wall
It is adapted, and the internal partition wall is fixed on the inner wall of the borehole wall.
Based on the above technical solution, the internal partition wall includes multiple annular internal partition wall units, the internal partition wall list
Member stacks gradually and is connected from bottom to top.
Based on the above technical solution, one end of multiple protrusions is interconnected to form a channel.
Based on the above technical solution, the compartment includes four protrusions, and the cross section of the compartment is ten
Font.
Based on the above technical solution, the compartment includes multiple cross compartment units, multiple compartments
Unit stacks gradually and is connected from bottom to top.
Based on the above technical solution, the center of the compartment unit offers through-hole, and all through-holes mutually interconnect
It is logical.
Based on the above technical solution, in the cap region through there is a reinforcing bar, the reinforcing bar by connecting plate with
The outer wall of the borehole wall is connected.
The present invention also provides a kind of bridge foundations, comprising:
Driving into type bridge deepwater open caisson as described in claim 1；
First back cover structure is filled in the back cover region；
Second back cover structure is set to the top of the first back cover structure, and the bottom of the compartment is located at described the
In two back cover structures；
Cushion cap is set in the cap region, between the bottom of the cushion cap and the top of the second back cover structure
An accommodating space is formed, is filled with sand in the accommodating space.
The present invention also provides a kind of construction methods of bridge foundation described above, comprising the following steps:
The borehole wall is squeezed into Cement Deep, and is handled suction mud is carried out in the borehole wall；
It pours the first back cover structure and fixes the blade foot；
Water in the borehole wall is emptied；
The compartment is installed, and pours the second back cover structure；
Sand is filled into the accommodating space；
Pour the cushion cap.
Compared with the prior art, the advantages of the present invention are as follows:
(1) part of squeezing into of driving into type bridge deepwater open caisson of the invention is single-wall structure, small with the contact area of soil, and
The advantages of for full steel structure, can effectively reduce the construction risk of conventional well sinking using driving into type scheme, and easy for construction fast
It is prompt.
(2) compartment of the invention is arranged in the pit shaft of open caisson, and main function is to increase open caisson in sinking watching
Rigidity, meanwhile, and entire open caisson is separated into multiple construction wellholes, makes to cut the earth and sink can more balancedly carry out, also just
Correction when open caisson deflection enables open caisson of the invention to effectively reduce the construction risk of conventional well sinking, realizes efficient
Rapid construction.
(3) open caisson construction of the invention uses driving into type form of construction work, avoids traditional steel open caisson suck sediment subsidence and connects height
The uppity weakness of working procedure, short construction period of the present invention, working security greatly improves, steel open caisson again can dual-purpose do
Cofferdam structure, the construction for pier stud.Open caisson stress of the invention is reliable, it is easy for construction, save the duration, be easy to operate, stablize,
Efficiently, remarkable in economical benefits.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of driving into type bridge deepwater open caisson in the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of borehole wall unit in the embodiment of the present invention；
Fig. 3 is the top view of Fig. 1；
Fig. 4 is the structural schematic diagram of interval of embodiment of the present invention shipping bill member；
Fig. 5 is the top partial enlarged view on Bridge of embodiment of the present invention basis；
Fig. 6 is the lower part partial enlarged view on Bridge of embodiment of the present invention basis.
In figure: the 1- borehole wall, 10- borehole wall unit, 11- accommodating space, 2- cushion cap, the cap region 3-, 30- reinforcing bar, 31- connection
Plate, 4- blade foot, 5- compartment, 50- protrusion, the channel 51-, 52- compartment unit, 53- through-hole, 6- back cover region, 7- internal partition wall,
70- internal partition wall unit, 8- the first back cover structure, 9- the second back cover structure.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and embodiments.
Shown in Figure 1, the embodiment of the present invention provides a kind of driving into type bridge deepwater open caisson, including the cylindric borehole wall 1,
Blade foot 4 and compartment 5, the borehole wall 1 are the outer walls of open caisson, are the major parts of open caisson, it should have enough intensity, to bear open caisson
The load acted in sinking watching and when use；It also requires have enough weight simultaneously, makes open caisson can be smoothly under Gravitative Loads
Sink.Traditional steel open caisson planar dimension is larger, and mostly rectangular configuration, centre setting multiple tracks partition wall, and the borehole wall is double-walled knot
Structure can not be constructed using mode is squeezed into, and the borehole wall 1 of open caisson of the invention is cylindric and is single-wall structure, the contact surface with soil
Product it is small, and be full steel structure the advantages of, can bear enough weight, completely can use driving into type construction, convenient and quick construction.
The top preset of the borehole wall 1 has one for casting concrete and forms the cap region 3 of cushion cap 2, and cap region 3 is the well of open caisson
It pushes up, forms cushion cap 2 in 3 pouring reinforcement concrete of cap region in work progress, can be built after cushion cap 2 reaches design strength
Pier.The borehole wall 1 includes multiple annular borehole wall units 10, and multiple borehole wall units 10 stack gradually and are connected from bottom to top, and the borehole wall 1 is in work
Factory is divided into annular borehole wall unit 10 and is manufactured, and the size of the borehole wall 1 is designed according to the actual demand of site operation, then by well
Wall unit 10 is transported to construction site, facilitates transport and the on-site consolidation of the borehole wall 1, brings great convenience for construction；Blade foot 4
Set on the bottom end of the borehole wall 1,1 lower end of the borehole wall is generally all made into " blade foot " of blade-like, and function is to reduce penetration resistance；Compartment 5
In the borehole wall 1, the top of compartment 5 is contained in cap region 3, forms one between bottom end and blade foot 4 and is used for casting concrete
Back cover region 6, can be in back cover area after technical checking and to shaft bottom cleaning leveling when well sinking to designed elevation
6 casting concrete of domain carries out back cover, to prevent in Groundwater infiltration well.And compartment 5 includes multiple protrusions 50, multiple protrusions
50 one end is connected with each other, and the other end is connected with the inner wall of the borehole wall 1, and multiple protrusions 50 are along the circumferencial direction interval of the borehole wall 1
Setting.The protrusion 50 of compartment 5 is distributed in the inner circle circumferential direction of the borehole wall 1, can the comprehensive change for preventing the borehole wall 1 during squeezing into
Shape influences construction quality.Traditional steel open caisson generally uses one section borehole wall unit 10 of tripping in, then carries out washing mud processing, then again
One section borehole wall unit 10 of tripping in carries out connecing height, is carrying out suction mud after connecing height, connect height and inhale mud easilying lead to sink at stake bottom
It is well inclined and be not easy to adjust, open caisson of the invention first by multiple borehole wall units 10 connect it is high form the borehole wall 1, then the borehole wall 1 is driven into
Stake bottom carries out inhaling mud processing, then by the fixed blade foot 4 of 6 casting concrete of back cover region, then tripping in compartment 5, the setting of compartment 5 exist
In the pit shaft of open caisson, main function be increase rigidity of the open caisson in sinking watching, meanwhile, and entire open caisson is separated into more
A construction wellhole makes to cut the earth and sinks can more balancedly carry out, is also convenient for correction when open caisson deflection, so that of the invention is heavy
Well can prevent the inclination during open caisson construction well, realize efficient rapid construction.
Shown in Figure 1, further, which further includes cylindric internal partition wall 7, and internal partition wall 7 is adapted with the borehole wall 1,
And internal partition wall 7 is fixed on the inner wall of the borehole wall 1.Ribs is connected on the borehole wall 1, internal partition wall 7 is used to support ribs, further
Prevent the deformation in open caisson driven pile.
Shown in Figure 2, further, internal partition wall 7 includes multiple annular internal partition wall units 70, and internal partition wall unit 70 is certainly
It stacks gradually and is connected on down.According to the size of actual construction Demand Design internal partition wall 7, internal partition wall unit 70 and borehole wall list
For the quantity of member 10 without equal, the design of internal partition wall unit 70 also for convenient transportation and plays omnidirectional support ribs
Effect.
Shown in Figure 3, optionally, one end of multiple protrusions 50 is interconnected to form a channel 51.I.e. compartment 5 is interior
Portion is hollow shape, can mitigate the weight of compartment 5 in this way, facilitates lifting.
Shown in Figure 4, optionally, compartment 5 includes four protrusions 50, and the cross section of compartment 5 is cross.Cross
The compartment 5 of type can mitigate the weight of compartment 5 significantly, and can prevent the deformation of the surrounding of the borehole wall 1.
It is shown in Figure 4, it is preferred that compartment 5 includes multiple cross compartment units 52, and multiple compartment units 52 are under
It stacks gradually and is connected on and.Compartment 5 is first to be fabricated to cross compartment unit 52 during factory manufacturing, then according to scene
The actual demand of construction transports a certain amount of compartment unit 52 to scene, is to divide multiple compartment units 52 in tripping in compartment 5
Section tripping in, multiple compartment units 52 are being stacked gradually from bottom to top and are being connected to form compartment 5.
It is shown in Figure 4, it is preferred that the center of compartment unit 52 offers through-hole 53, and all through-holes 53 are interconnected.
52 center of compartment unit during factory manufacturing offers through-hole 53, will be fashionable under the segmentation of multiple compartment units 52, by through-hole 53
It is aligned with protrusion 50, all through-holes 53 are interconnected and form channel 51, can mitigate the weight of compartment 5, Er Qiefang significantly
Just the lifting of compartment 5.
Shown in Figure 5, further, through there is reinforcing bar 30 in cap region 3, reinforcing bar 30 passes through connecting plate 31 and the borehole wall
1 outer wall is connected.Cap region 3 is the Jing Ding of open caisson, forms cushion cap in 3 pouring reinforcement concrete of cap region in work progress
2, pier can be built after cushion cap 2 reaches design strength.
Armored concrete can reinforce the load-carrying ability of cushion cap 2, can carry the weight of bridge pier.
Shown in referring to figs. 5 and 6, the embodiment of the present invention also provides a kind of bridge foundation, including above-mentioned driving into type bridge
Deep water open caisson, the first back cover structure 8, the second back cover structure 9 and cushion cap 2, the first back cover structure 8 are concrete, are filled in envelope
In bottom region 6 that blade foot 4 is fixed to open caisson progress back cover, the second back cover structure 9 is concrete, is set to the first back cover structure 8
Top, and the bottom of compartment 5 is located in the second back cover structure 9, and it is heavy that the progress back cover of compartment 5 is fixed on by the second back cover structure 9
In well shaft, cushion cap 2 is set in cap region 3, and in cap region, 3 pouring reinforcement concrete forms cushion cap 2, the bottom of cushion cap 2
It forms an accommodating space 11 between the top of the second back cover structure 9, is filled with sand in accommodating space 11, sand is by compartment 5 and well
Filling in cylinder, entire open caisson is waterproof and the load that is able to bear is big, and the stake of bridge is formed after cushion cap 2 reaches design strength
Basis builds bridge pier in pile foundation.
The embodiment of the present invention also provides a kind of construction method of above-mentioned bridge foundation, comprising the following steps:
Multiple borehole wall units 10 are stacked gradually connected from bottom to top, and forms the borehole wall 1；
The borehole wall 1 is squeezed into Cement Deep, and is handled suction mud is carried out in the borehole wall 1；
The first back cover structure 8 is poured in back cover region 6 and fixes blade foot 4, and back cover is carried out to open caisson；
Water in the borehole wall 1 is emptied；
Compartment 5 is installed, and pours the second back cover structure 9 and compartment 5 is subjected to back cover；
Sand is filled into accommodating space 11；
In cap region, 3 pouring reinforcement concrete forms cushion cap 2.
Wherein compartment 5 installation specifically includes the following steps:
The bottom of compartment unit 52 will be made to be held in the top of the first back cover structure 7 in 52 tripping in the borehole wall of a section compartment unit
End, and four protrusions 50 of compartment unit 52 are connected with the inner wall of the borehole wall 1；
52 bottom of compartment unit is poured the second back cover structure 8 to fix the bottom of compartment unit 52；
Successively transfer remaining compartment unit 52, and by four protrusions 50 of all compartment units 52 and the borehole wall 1
Inner wall is connected, and all compartment units 52 are laminated from bottom to top and are aligned connected.
Using driving into type form of construction work of the invention, avoids traditional steel open caisson suck sediment subsidence and connect high working procedure not
Manageable weakness, short construction period of the present invention, working security greatly improve, steel open caisson again can dual-purpose do cofferdam structure, use
In the construction of pier stud.Open caisson stress of the invention is reliable, it is easy for construction, save the duration, be easy to operate, stablize, efficiently, economy effect
It is beneficial significant.
The construction method of driving into type of the invention is that the prior art is impracticable, the reason is that existing steel open caisson planar dimension
It is larger, and mostly rectangular configuration, centre setting multiple tracks partition wall, and siding is double-walled construction, if using scheme is squeezed into, mainly
For the control of four aspect reasons: end resistance, side friction and squeezing into construction machinery, caisson structure is specific to influence are as follows:
End resistance factor: traditional steel open caisson end resistance forced area greatly increases compared with this patent, and with squeezing into depth
The increase of degree, native foundation bearing capacity increase with depth and are become larger.So end resistance is very big when big open caisson is squeezed into.
Collateral resistance factor: multiple tracks partition wall is set, and siding is double-walled construction, using driving into type among traditional steel open caisson
When scheme, contact area of the open caisson side compared with this patent with soil is greatly increased, and soil is very big to the collateral resistance of caisson structure.
Squeeze into construction machinery factor: since open caisson end resistance and collateral resistance are larger, existing construction machinery is unable to satisfy substantially
The ability squeezed into.
Caisson structure factor: caisson structure is mostly used the mode that steel open caisson is combined with concrete open caisson, and mostly coxopodite steel is heavy
Concrete open caisson is used above in well, if concrete stress is totally unfavorable using driving into type scheme, is unable to satisfy substantially very big
The effect of hammer force.
Based on the above reasons, existing open caisson is substantially infeasible using scheme is squeezed into.
And the part of squeezing into of open caisson of the invention is single-wall structure, it is small with the contact area of soil, and be the excellent of full steel structure
Point can effectively reduce the construction risk of conventional well sinking, and convenient and quick construction using driving into type scheme.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as protection of the invention
Within the scope of.The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (10)
1. a kind of driving into type bridge deepwater open caisson characterized by comprising
The cylindric borehole wall (1), top preset have one for casting concrete and form the cap region (3) of cushion cap (2), institute
Stating the borehole wall (1) includes multiple annular borehole wall units (10), and multiple borehole wall units (10) stack gradually and are connected from bottom to top；
Blade foot (4) is set to the bottom end of the borehole wall (1)；
Compartment (5) is set in the borehole wall (1), and the top of the compartment (5) is contained in the cap region (3), bottom end
A back cover region (6) for being used for casting concrete is formed between the blade foot (4), and the compartment (5) includes multiple protrusions
The one end in portion (50), multiple protrusions (50) is connected with each other, and the other end is connected with the inner wall of the borehole wall (1), multiple
The protrusion (50) is arranged along the circumferencial direction interval of the borehole wall (1).
2. driving into type bridge deepwater open caisson as described in claim 1, which is characterized in that the open caisson further includes cylindric internal partition wall
(7), the internal partition wall (7) is adapted with the borehole wall (1), and the internal partition wall (7) is fixed on the inner wall of the borehole wall (1)
On.
3. driving into type bridge deepwater open caisson as claimed in claim 2, which is characterized in that the internal partition wall (7) includes multiple rings
Shape internal partition wall unit (70), the internal partition wall unit (70) stack gradually and are connected from bottom to top.
4. driving into type bridge deepwater open caisson as described in claim 1, which is characterized in that one end of multiple protrusions (50)
It is interconnected to form a channel (51).
5. driving into type bridge deepwater open caisson as described in claim 1, which is characterized in that the compartment (5) includes four protrusions
Portion (50), and the cross section of the compartment (5) is cross.
6. driving into type bridge deepwater open caisson as claimed in claim 5, which is characterized in that the compartment (5) includes multiple crosses
The compartment unit (52) of type, multiple compartment units (52) stack gradually and are connected from bottom to top.
7. driving into type bridge deepwater open caisson as claimed in claim 6, which is characterized in that open at the center of the compartment unit (52)
Equipped with through-hole (53), all through-holes (53) are interconnected.
8. driving into type bridge deepwater open caisson as described in claim 1, which is characterized in that running through in the cap region (3) has
Reinforcing bar (30), the reinforcing bar (30) are connected by connecting plate (31) with the outer wall of the borehole wall (1).
9. a kind of bridge foundation characterized by comprising
Driving into type bridge deepwater open caisson as described in claim 1；
First back cover structure (8) is filled in the back cover region (6)；
Second back cover structure (9) is set to the top of the first back cover structure (8), and the bottom of the compartment (5) is located at institute
It states in the second back cover structure (9)；
Cushion cap (2) is set in the cap region (3), the bottom of the cushion cap (2) and the second back cover structure (9)
It is formed between top an accommodating space (11), sand is filled in the accommodating space (11).
10. a kind of construction method of bridge foundation as claimed in claim 9, which comprises the following steps:
The borehole wall (1) is squeezed into Cement Deep, and is handled suction mud is carried out in the borehole wall (1)；
It pours the first back cover structure (8) and fixes the blade foot (4)；
Water in the borehole wall (1) is emptied；
The compartment (5) are installed, and pour the second back cover structure (9)；
Sand is filled into the accommodating space (11)；
Pour the cushion cap (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910211398.6A CN109944267A (en) | 2019-03-20 | 2019-03-20 | Driving into type bridge deepwater open caisson and bridge foundation and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910211398.6A CN109944267A (en) | 2019-03-20 | 2019-03-20 | Driving into type bridge deepwater open caisson and bridge foundation and construction method |
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| CN109944267A true CN109944267A (en) | 2019-06-28 |
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| CN201910211398.6A Pending CN109944267A (en) | 2019-03-20 | 2019-03-20 | Driving into type bridge deepwater open caisson and bridge foundation and construction method |
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| CN114016535A (en) * | 2021-11-15 | 2022-02-08 | 武汉理工大学 | Construction method of bridge foundation and deep water prefabricated structure |
| CN114108469A (en) * | 2021-10-26 | 2022-03-01 | 山东高速工程建设集团有限公司 | Reverse construction method rapid construction method for large-span prestressed cast-in-place bridge |
| CN114855853A (en) * | 2022-05-19 | 2022-08-05 | 中铁十五局集团有限公司 | Bottom sealing construction method in sinking well |
| CN115162395A (en) * | 2022-07-04 | 2022-10-11 | 中铁大桥勘测设计院集团有限公司 | Shell-core separation type composite open caisson foundation and construction method |
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| CN115162395B (en) * | 2022-07-04 | 2024-04-09 | 中铁大桥勘测设计院集团有限公司 | Construction method of shell-core separation type composite open caisson foundation |
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Application publication date: 20190628 |