CN109440796A - Suitable for the inverted T shaped precast caisson of deep water drift net area or shallow overburden basis and its construction method - Google Patents
Suitable for the inverted T shaped precast caisson of deep water drift net area or shallow overburden basis and its construction method Download PDFInfo
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- CN109440796A CN109440796A CN201811456538.8A CN201811456538A CN109440796A CN 109440796 A CN109440796 A CN 109440796A CN 201811456538 A CN201811456538 A CN 201811456538A CN 109440796 A CN109440796 A CN 109440796A
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- partition wall
- cabinet
- cylinder
- inverted
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D23/00—Caissons; Construction or placing of caissons
- E02D23/02—Caissons able to be floated on water and to be lowered into water in situ
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D23/00—Caissons; Construction or placing of caissons
- E02D23/08—Lowering or sinking caissons
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Revetment (AREA)
Abstract
The invention discloses the inverted T shaped precast caisson bases for being suitable for deep water drift net area or shallow overburden, including cabinet, the first partition wall, cylinder, cover board and cushion cap, the outer edge of the cross section of the cabinet is that a rectangle rounded corner is formed, and cabinet is internally provided with two the second partition walls；The first partition wall described in a row is respectively set between every second partition wall and the inner wall of the cabinet；The outer edge of the cross section of the cylinder is formed for the strip hole that both ends are circular arc, or is formed for a rectangle rounded corner；The cover board is accepted on the top of the cylinder, and the cover board accepts the cushion cap.The present invention uses inverted T shaped caisset form, water flow adaptability is good, the flow force and wave force that structure is born are small, steel open caisson, concrete open caisson or steel reinforced concrete combination open caisson can be used in caisson foundation, and caisson lower layer uses larger-size body structure, and vertically and horizontally the first partition wall is set, caisson antidumping and stability against slope are good, and base stress is small.
Description
Technical field
The invention belongs to bridge fields, more particularly, to precast caisson basis and its construction method.
Background technique
With the rapid development of the national economy, transport development demand surges, is building both at home and abroad and preparing to build big
Type bridge is more and more, and with the appearance of bridge spanning the sea, span of bridge is increasing.These length, big bridge majority are built in
On the anxious big rivers of the depth of water, the stream or sea of bad environments often encounters the difficulties such as the deeper depth of water, naked petrographic province and shallow overburden area
Topic, is highly detrimental to bridge construction, and the difficulty that basis is built is also bigger.The construction cost of bridge substructure typically constitutes from bed rearrangement bridge
The investment of beam 30% is an important factor for influencing bridge economic.
Currently used base form mainly has pile foundation and well foundation, and there are following on bridge deepwater foundation is applied
Problem:
1) naked petrographic province pile foundation scheme, drilling platform setting is difficult, water flow bad adaptability, flow force that structure is born and
Wave force is big.
2) well foundation structure size is big, bears biggish flow force and wave force, and working procedure is more, and complex process is made
Valence is high.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides be suitable for deep water drift net area or shallow covering
The inverted T shaped precast caisson basis of layer and its construction method, can not only meet bridge foundation structure stress, economy and implementable
Property is also superior to currently used base form.
To achieve the above object, according to one aspect of the present invention, it provides suitable for deep water drift net area or shallow overburden
Inverted T shaped precast caisson basis, which is characterized in that including cabinet, the first partition wall, cylinder, cover board and cushion cap, wherein
The cabinet, the first partition wall and cylinder are vertically arranged；
The outer edge of the cross section of the cabinet is that a rectangle rounded corner is formed, and cabinet is internally provided with two
Second partition wall, the length direction of every second partition wall cross section is consistent with the length direction of the cabinet cross section, and
And the both ends of every second partition wall are abutted with the inner wall of the cabinet；
First partition wall is provided with two rows, and is respectively set between every second partition wall and the inner wall of the cabinet
The both ends of first partition wall described in one row, each first partition wall are contacted with the inner wall of cabinet and second partition wall respectively, and
And each first partition wall is each perpendicular to the second partition wall setting；
The cylinder is hollow, and the outer edge of the cross section of the cylinder is formed for the strip hole that both ends are circular arc, or
It is formed for a rectangle rounded corner, and the vertical consistency of the longitudinal direction of the cylinder cross section and the cabinet cross section, it is described
Cylinder is seated on two second partition walls of the cabinet, is accepted jointly by two second partition walls；
The cross-sectional area of the cabinet is greater than the cross-sectional area of the cylinder, and the cabinet and the cylinder
Vertical centerline is collinear；
The cover board is accepted on the top of the cylinder, and the cover board accepts the cushion cap.
Preferably, the joint of each first partition wall and the cabinet carries out chamfering setting.
Preferably, the contact position of each first partition wall and second partition wall carries out chamfering setting.
Preferably, the thickness of second partition wall is identical as the thickness of the cylinder, and the inner wall of the cylinder
Straight portion is aligned with the side of second partition wall.
Preferably, the joint of second partition wall and the cabinet carries out chamfering setting.
Preferably, the top of the inboard wall of cylinder is formed with step by the thinning mode of wall thickness, with described for accepting
Cover board.
Other side according to the invention additionally provides the T for being suitable for deep water drift net area or shallow overburden
The construction method on type precast caisson basis, which comprises the following steps:
1) underwater demolition construction is carried out to the basis instrument area of naked petrographic province or shallow overburden, and substrate is carried out using dredger
Cleaning and leveling；
2) cylinder, cabinet, the first partition wall and the second partition wall are carried out entirety to be manufactured, then transportation by driving to bridge location；
3) it is positioned using station keeping ship or anchoring pile anchorage positioning system, inverted T-shaped precast caisson basis is then filled the water into lower calmness
Bed；
4) prefabricated cover board, and the also concrete perfusion between the first partition wall are set on inverted T-shaped precast caisson basis top；
5) concrete perfusion forms cushion cap on the cover board.
Preferably, after forming cushion cap, then to being protected around the foundation pit on precast caisson basis, to protect described prefabricated sink
Box foundation.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect:
1) present invention uses up-small and down-big inverted T-type structure form, and water flow adaptability is good, flow force that structure is born and
Wave force is small, and lower part uses larger-size body structure, and is provided with the partition wall of vertical and horizontal, precast caisson basis
Antidumping and stability against slope it is good, base stress is small.
2) top cylinder of the invention can be determined according to superstructure bridge pier and bridge tower form, using the rectangle with rounded corner
Or nose circle shape, it is adaptable to upper structure type.
3) top of the invention is provided with entity section suspended deck structure, and superstructure load is transferred to precast caisson basis,
And it can be used as the operation platform of superstructure.
4) local scouring depth of the invention is small, can be reduced basic scale, reduces construction investment, and speed of application is fast,
Construction risk is low.
Detailed description of the invention
Fig. 1 is the elevation in the present invention；
Fig. 2 is the cross-sectional view of middle column body of the present invention；
Fig. 3 is the side view in the present invention；
Fig. 4 is schematic top plan view of the invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
As shown in Figure 1 to 4, suitable for the inverted T shaped precast caisson of deep water drift net area or shallow overburden basis, precast caisson
Steel open caisson, concrete open caisson or steel reinforced concrete combination open caisson can be used in basis comprising cabinet 1, the first partition wall 2, cylinder 3,4 and of cover board
Cushion cap 5, wherein
The cabinet 1, the first partition wall 2 and cylinder 3 are vertically arranged；
The outer edge of the cross section of the cabinet 1 is that a rectangle rounded corner is formed, and cabinet 1 is internally provided with two
The second partition wall of item 6, length direction one of the length direction of every 6 cross section of the second partition wall with 1 cross section of cabinet
It causes, and the both ends of every second partition wall 6 are abutted with the inner wall of the cabinet 1；
First partition wall 2 is provided with two rows, and between every second partition wall 6 and the inner wall of the cabinet 1 respectively
First partition wall 2 described in one row is set, the both ends of each first partition wall 2 respectively with the inner wall of cabinet 1 and second partition wall 6
Contact, and each first partition wall 2 is each perpendicular to second partition wall 6 and is arranged；
The cylinder 3 is hollow, and the outer edge of the cross section of the cylinder 3 is formed for the strip hole that both ends are circular arc, or
Person is formed for a rectangle rounded corner, and the vertical consistency of the longitudinal direction of 3 cross section of the cylinder and 1 cross section of cabinet,
The cylinder 3 is seated on two second partition walls 6 of the cabinet 1, is accepted jointly by two second partition walls 6；
The cross-sectional area of the cabinet 1 is greater than the cross-sectional area of the cylinder 3, so that the precast caisson base
Plinth is integrally in inverted T shaped, and the vertical centerline of the cabinet 1 and the cylinder 3 is collinear
The cover board 4 is accepted on the top of the cylinder 3, and the cover board 4 accepts the cushion cap 5.
Further, the joint of each first partition wall 2 and the cabinet 1 carries out chamfering setting, prevents cusp stress
It concentrates.
Further, the contact position of each first partition wall 2 and second partition wall 6 carries out chamfering setting.
Further, the thickness of second partition wall 6 is identical as the thickness of the cylinder 3, and the inner wall of the cylinder 3
Straight portion be aligned with the side of second partition wall 6, the better support cylinder 3 of the second partition wall 6 can be allowed in this way, cylinder 3
It is less likely to occur to misplace, and manufactures also more convenient.
Further, the joint of second partition wall 6 and the cabinet 1 carries out chamfering setting, can prevent cusp in this way
Stress is concentrated.
Further, the top of 3 inner wall of cylinder is formed with step by the thinning mode of wall thickness, with described for accepting
Cover board 4.
Other side according to the invention additionally provides the T for being suitable for deep water drift net area or shallow overburden
The construction method on type precast caisson basis, which comprises the following steps:
1) underwater demolition construction is carried out to the basis instrument area of naked petrographic province or shallow overburden, and substrate is carried out using dredger
Cleaning and leveling；
2) cylinder 3, cabinet 1, the first partition wall 2 and the second partition wall 6 are carried out entirety to be manufactured, then transportation by driving to bridge location；
3) it is positioned using station keeping ship or anchoring pile anchorage positioning system, inverted T-shaped precast caisson basis is then filled the water into lower calmness
Bed；
4) prefabricated cover board 4, and the also concrete perfusion between the first partition wall 2 are set on inverted T-shaped precast caisson basis top；
5) concrete perfusion forms cushion cap 5 on cover board 4.
Further, it after forming cushion cap 5, then protects metalling is backfilled around the foundation pit on precast caisson basis, to protect
Protect the precast caisson basis.
The present invention uses up-small and down-big inverted T-type structure form, and water flow adaptability is good, the flow force and wave that structure is born
Unrestrained power is small, and cylinder 3 uses round end type section form, and uses up-small and down-big inverted T-shaped form, reduces blocking of the top to water flow
Effect, and lower part uses larger-size 1 structure of cabinet, and is provided with the partition wall of vertical and horizontal, and partition wall mainly reduces case
Body 1 and the vertical and horizontal effective span of cylinder 3, so that structure stress and local stability are improved, precast caisson basis
Antidumping and stability against slope are good, and base stress is small.
Top cylinder 3 of the invention can be determined according to superstructure bridge pier and bridge tower form, use the square with rounded corner
Shape or nose circle shape, it is adaptable to upper structure type, because the generally rectangular cross-section section form of superstructure or distal end shape are cut
Face form can effectively carry out top and the bottom structure drop-over using the rectangle with rounded corner or the basic section form of nose circle shape.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (8)
1. being suitable for the inverted T shaped precast caisson basis of deep water drift net area or shallow overburden, which is characterized in that including cabinet, first
Partition wall, cylinder, cover board and cushion cap, wherein
The cabinet, the first partition wall and cylinder are vertically arranged；
The outer edge of the cross section of the cabinet is that a rectangle rounded corner is formed, and cabinet is internally provided with two second
Partition wall, the length direction of every second partition wall cross section is consistent with the length direction of the cabinet cross section, and every
The both ends of the second partition wall of item are abutted with the inner wall of the cabinet；
First partition wall is provided with two rows, and a row is respectively set between every second partition wall and the inner wall of the cabinet
The both ends of first partition wall, each first partition wall are contacted with the inner wall of cabinet and second partition wall respectively, and every
A first partition wall is each perpendicular to the second partition wall setting；
The cylinder is hollow, and the outer edge of the cross section of the cylinder is formed for the strip hole that both ends are circular arc, or is one
Rectangle rounded corner is formed, and the vertical consistency of the longitudinal direction of the cylinder cross section and the cabinet cross section, the cylinder
It is seated on two second partition walls of the cabinet, is accepted jointly by two second partition walls；
The cross-sectional area of the cabinet is greater than the cross-sectional area of the cylinder, and the cabinet and the cylinder is vertical
Center line is collinear；
The cover board is accepted on the top of the cylinder, and the cover board accepts the cushion cap.
2. according to claim 1 suitable for the inverted T shaped precast caisson of deep water drift net area or shallow overburden basis, feature
It is, the joint of each first partition wall and the cabinet carries out chamfering setting.
3. according to claim 1 suitable for the inverted T shaped precast caisson of deep water drift net area or shallow overburden basis, feature
It is, the contact position of each first partition wall and second partition wall carries out chamfering setting.
4. according to claim 1 suitable for the inverted T shaped precast caisson of deep water drift net area or shallow overburden basis, feature
Be, the thickness of second partition wall is identical as the thickness of the cylinder, and the straight portion of the inner wall of the cylinder with
The side of second partition wall is aligned.
5. according to claim 1 suitable for the inverted T shaped precast caisson of deep water drift net area or shallow overburden basis, feature
It is, the joint of second partition wall and the cabinet carries out chamfering setting.
6. according to claim 1 suitable for the inverted T shaped precast caisson of deep water drift net area or shallow overburden basis, feature
It is, the top of the inboard wall of cylinder is formed with step by the thinning mode of wall thickness, for accepting the cover board.
7. being suitable for the inverted T shaped prefabricated heavy of deep water drift net area or shallow overburden in claim 1~6 described in any claim
The construction method of box foundation, which comprises the following steps:
1) underwater demolition construction is carried out to the basis instrument area of naked petrographic province or shallow overburden, and substrate cleaning is carried out using dredger
And leveling；
2) cylinder, cabinet, the first partition wall and the second partition wall are carried out entirety to be manufactured, then transportation by driving to bridge location；
3) it is positioned using station keeping ship or anchoring pile anchorage positioning system, inverted T-shaped precast caisson basis is then filled the water into sinking implantation；
4) prefabricated cover board, and the also concrete perfusion between the first partition wall are set on inverted T-shaped precast caisson basis top；
5) concrete perfusion forms cushion cap on the cover board.
8. the construction method as claimed in claim 7 suitable for deep water drift net area or the inverted T shaped precast caisson basis of shallow overburden,
It is characterized in that, after forming cushion cap, then to being protected around the foundation pit on precast caisson basis, to protect the precast caisson base
Plinth.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811456538.8A CN109440796A (en) | 2018-11-30 | 2018-11-30 | Suitable for the inverted T shaped precast caisson of deep water drift net area or shallow overburden basis and its construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811456538.8A CN109440796A (en) | 2018-11-30 | 2018-11-30 | Suitable for the inverted T shaped precast caisson of deep water drift net area or shallow overburden basis and its construction method |
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| CN109440796A true CN109440796A (en) | 2019-03-08 |
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| CN201811456538.8A Pending CN109440796A (en) | 2018-11-30 | 2018-11-30 | Suitable for the inverted T shaped precast caisson of deep water drift net area or shallow overburden basis and its construction method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111691447A (en) * | 2020-05-27 | 2020-09-22 | 武汉建策工程咨询有限公司 | Slow sinking type caisson construction method for reducing load of immersed tube tunnel tube top |
| CN111859486A (en) * | 2020-07-24 | 2020-10-30 | 中船第九设计研究院工程有限公司 | Analysis method for digital-analog calculation of stability of leveling machine |
| CN112878357A (en) * | 2021-02-20 | 2021-06-01 | 中交第二航务工程局有限公司 | Super-hectometer deepwater sea-crossing bridge caisson foundation structure and construction method |
| CN114016535A (en) * | 2021-11-15 | 2022-02-08 | 武汉理工大学 | Construction method of bridge foundation and deep water prefabricated structure |
| CN118880921A (en) * | 2024-09-30 | 2024-11-01 | 泰州名匠工程项目管理有限公司 | A self-balancing, self-circulating sinking structure and method for caisson |
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| CN118880921A (en) * | 2024-09-30 | 2024-11-01 | 泰州名匠工程项目管理有限公司 | A self-balancing, self-circulating sinking structure and method for caisson |
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