CN208965572U - A kind of super plane area portions prestressed concrete well foundation - Google Patents
A kind of super plane area portions prestressed concrete well foundation Download PDFInfo
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- CN208965572U CN208965572U CN201821658881.6U CN201821658881U CN208965572U CN 208965572 U CN208965572 U CN 208965572U CN 201821658881 U CN201821658881 U CN 201821658881U CN 208965572 U CN208965572 U CN 208965572U
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Abstract
The utility model discloses a kind of super plane area portions prestressed concrete well foundations, first section partially prestressed concrete open caisson section including lower part and disposed thereon connect high part prestressed concrete or ordinary reinforced concrete open caisson section, head section partially prestressed concrete open caisson section (1) uses partially prestressed concrete structures, being disposed with the middle part of prestressed strand, vertically and horizontally internal partition wall forms partial prestressing " cross " beam, the Jing Qiang for being somebody's turn to do " rood beam " and same arrangement prestress forms the partially prestressed concrete " beam lattice " that can effectively resist complicated force status, head saves well sinking to designated position, high subsequent each standard segment is connect again and successively sinks down into designated position, until completing to sink eventually.The utility model improves use " the big the bottom of a pan " and excavates caisson structure safety and anti-cracking performance in sinking, especially suitable for 4000-10000m2Large-scale rectangular, circle, ellipse, end circular open caisson basis.
Description
Technical field
The utility model relates to large bridge infrastructure technologies fields, more particularly to a kind of super plane area portions
Prestressed concrete well foundation.
Background technique
Common open caisson has the reinforced concrete open caisson etc. of steel open caisson, steel-shelled concrete, low grade in engineering at present, for
Large bridge well foundation, with the increase of the open caisson area of plane, the influence of foundation soil inhomogeneities is more significant under open caisson, applies
The problems such as stress is complicated during work, cracking dramatically increases.It excavates according to traditional " the big the bottom of a pan " in large-scale well-sinking basis
When, since its relative altitude is small and vertical bending stiffness is smaller (the huge planar dimension of large-scale well-sinking more exacerbates this effect),
Caisson structure partition wall lower concrete structure stress under Gravitative Loads is very big, it may occur that a wide range of cracking phenomena jeopardizes open caisson
The safety of structure simultaneously influences its durability.Therefore, how to 4000-10000m2Large-scale rectangular, circle, ellipse, end it is round
Well foundation excavates sinking well foundation in particular by " the big the bottom of a pan " and carries out crack-resisting design as urgent problem to be solved.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of super plane area portions prestressing force
Concrete open caisson basis, can improve 4000-10000m2Large-scale rectangular, circle, ellipse, end circular open caisson basis is using " big
Excavate caisson structure safety and anti-cracking performance in sinking in the bottom of a pan ".
The purpose of this utility model is achieved through the following technical solutions: a kind of super plane area portions are answered in advance
Power concrete open caisson basis, it includes the first section partially prestressed concrete open caisson section of lower part and disposed thereon to connect high part pre-
Prestressed concrete or ordinary reinforced concrete open caisson section, wherein head section partially prestressed concrete open caisson section is answered in advance using part
Power concrete structure, the structure is by being arranged in the Jing Qiang and internal partition wall group of the arranged crosswise in the middle part of open caisson in length and breadth of open caisson surrounding
At, wherein the Jing Qiang and internal partition wall are all made of C40-C60 high strength concrete and cooperate post-stressed system, well
It is provided with prestressed strand in wall and internal partition wall, being disposed with the middle part of prestressed strand, vertically and horizontally internal partition wall forms part and answers in advance
Power " cross " beam, the surrounding Jing Qiang for being somebody's turn to do " rood beam " and same arrangement prestress form the force status that can effectively resist complexity
Partially prestressed concrete " beam lattice ".
The bottom of the first section partially prestressed concrete open caisson section is provided with steel blade foot, head section partial prestressing coagulation
The middle and upper part of native open caisson section is provided with double flange construction.
The first section partially prestressed concrete open caisson section is in the support of four angle point of rectangular open caisson head section, circular open caisson head section
Under the operating condition that four-point supporting, end round or ellipse garden end support, the degree of prestressing of Jing Qiang is allowable tensile stress but does not open
It splits, corresponds to A class prestressed component, internal partition wall degree of prestressing is to allow to crack but fracture width does not transfinite, and corresponds to B class and answers in advance
Power component.
The prestressed concrete open caisson knot for connecing high part prestressed concrete or ordinary reinforced concrete open caisson section
Structure or reinforced concrete open caisson structure are made of the Jing Qiang and the internal partition wall being arranged in the middle part of open caisson for being arranged in open caisson surrounding, are connect
The Jing Qiang and internal partition wall of high part prestressed concrete or ordinary reinforced concrete open caisson section are mixed with head section partial prestressing respectively
The Jing Qiang of solidifying soil open caisson section and internal partition wall matching, wherein according to heavy in the Jing Qiang and internal partition wall of prestressed concrete caisson structure
Well construction needs to be arranged or be not provided with prestressed strand.
The Covered with Angles blade foot of the first section bottom partially prestressed concrete open caisson section surrounding Jing Qiang is inside monocline slope
Blade foot, the Covered with Angles blade foot of internal partition wall bottom are sloped sides blade foot, head section partially prestressed concrete open caisson section surrounding Jing Qiang
The reinforced concrete structure of the steel plate of outsourcing 1-3cm thickness, encased steel plate inside are adopted with the Covered with Angles blade foot of internal partition wall bottom
Welding regular reinforcement or overlap joint reinforce steel plate and are connected with inner concrete steel mesh.
The first section partially prestressed concrete open caisson section surrounding Jing Qiang middle and lower part disposed inboard double flange construction, head section
Double flange construction is arranged in partially prestressed concrete open caisson section internal partition wall middle and lower part two sides, and in the flange of double flange construction
It is inside disposed with stiffener and forms collar tie beam structure, the effect of double flange construction is the back cover coagulation of build-in open caisson after-pouring in place
Soil is allowed to effective connection with first section caisson structure, and promotes globality, bearing capacity and the cracking resistance of first section caisson structure.
The prestressed strand is arranged in the bottom of surrounding Jing Qiang and middle part internal partition wall wall, and disperses to be anchored in Jing Qiang
Wall end, the prestressed strand arranges in a manner of bending up upwards to the both ends of Jing Qiang, tensioning is carried out using post stretching,
Wherein, the tensioning at 35cm-200cm above the blade foot of the prestressed strand in first section partially prestressed concrete open caisson section, it is multiple rows of
2-4 beam is set in arrangement, an arrangement, and every beam includes 7-19 root nominal diameter 15.2mm prestress wire, the prestress wire
Tensile strength is 1720-1960MPa.
The thickness of the protective layer of arrangement prestress steel beam is not less than in the surrounding Jing Qiang and middle part internal partition wall wall
0.2m, while the prestressed strand curved start point distance end anchor solid point distance is not less than 2m, transfer angle is not more than 30 degree.
Described connecing has poured open caisson cover board in high part prestressed concrete or ordinary reinforced concrete open caisson section.
A kind of construction method of super plane area portions prestressed concrete well foundation, it is comprised the steps of:
S1, according to engineering demand design plane area be 4000-10000m2Large-scale gravity type well foundation size, really
Determine the quantity of open caisson vertically and horizontally partition wall；
S2, open caisson warehouse quantity is determined according to the quantity of vertically and horizontally partition wall, the relatively small individual well storehouse of the area of plane
Prestress wire arranges that the prestress wire in the relatively large twin-well storehouse of the area of plane uses " double ten using " cross " shape
Word " shape arrangement；
S3, first section partially prestressed concrete open caisson section is determined according to open caisson warehouse quantity and connects high part prestressing force and is mixed
The length of solidifying soil or ordinary reinforced concrete open caisson section；
S4, installation open caisson bracket, template, steel blade foot and prestressed plastic corrugated pipe, assembling reinforcement simultaneously pour open caisson just head
Partially prestressed concrete open caisson section concrete is saved, post stretching stretch-draw prestressing force steel feet line and anchor are used after the completion of concrete curing
Gu；
S5, each wellhole are excavated take soil simultaneously, shallow " the big the bottom of a pan " support conditions of the intermediate deep surrounding of formation, at the beginning of head saves open caisson section
Beginning sinks down into specified absolute altitude, be followed by high first standard segment to specified absolute altitude, recycled with this, it is heavy eventually to be finally reached open caisson,
Concrete sealing bottom fills and pours well lid.
The beneficial effects of the utility model are: 1, be suitable for the area of plane large-scale rectangular of 4000-10000m2, circle,
Ellipse, end circular open caisson basis, excavate the well foundation of sinking in particular by traditional " the big the bottom of a pan ".2, tradition is overcome
The shortcomings that " the big the bottom of a pan " method for sinking, can give full play to " the big the bottom of a pan " and excavate the advantage of sinking.Both can guarantee caisson structure by
Power safety, and can be sunk in whole subsidence process using " the big the bottom of a pan ", well sinking speed is accelerated, to reduce the duration and reduce
Construction whole cost.3, introducing portion prestress system enhances the globality and crack resistance of caisson structure, is conducive to open caisson knot
The safety of structure and durability.4, add prestress wire in borehole wall bottom section, can also resist the partial collapse of the substrate soil body,
The construction risks such as founding, so that large extra caisson be made safely and fast to sink down into designated position.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of the utility model sloped sides blade foot；
Fig. 3 is the structural schematic diagram of monocline slope blade foot on the inside of the utility model；
Fig. 4 is the utility model rectangle list " cross " prestressed strand plane of arrangement schematic diagram；
Fig. 5 is bis- " cross " the prestressed strand plane of arrangement schematic diagrames of the utility model rectangle；
Fig. 6 is oval single " cross " prestressed strand plane of arrangement schematic diagram of the utility model.
In figure, 1-first section partially prestressed concrete open caisson section, 2-connect high part prestressed concrete or regular reinforcement
Concrete open caisson section, 3-prestressed strands, 4-sloped sides blade foots, 5-inside monocline slope blade foots, 6- open caisson cover board, in 7-
Portion's concrete bar, 8- wall end.
Specific embodiment
Below in conjunction with drawings and examples, the technical solution of the utility model is clearly and completely described, is shown
So, the described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.It is practical new based on this
Embodiment in type, those skilled in the art's every other implementation obtained under the premise of not making the creative labor
Example, fall within the protection scope of the utility model.
As shown in Figure 1, a kind of super plane area portions prestressed concrete well foundation, it includes the first section portion of lower part
Point prestressed concrete open caisson section 1 and it is disposed thereon connect high part prestressed concrete or ordinary reinforced concrete open caisson section 2,
Wherein, first section partially prestressed concrete open caisson section 1 uses partially prestressed concrete structures, and the structure is by being arranged in open caisson four
The internal partition wall composition of the Jing Qiang in week and in length and breadth arranged crosswise in the middle part of open caisson, wherein the Jing Qiang and internal partition wall are all made of C40-
C60 high strength concrete cooperates post-stressed system, and open caisson is separated many storehouses by the internal partition wall of arranged crosswise in length and breadth
Room is reinforcement structure, effectively enhances the stability of open caisson, be provided with prestressed strand 3 in Jing Qiang and internal partition wall, is arranged
Having the middle part of prestressed strand, vertically and horizontally internal partition wall forms partial prestressing " cross " beam, should " rood beam " and same arrangement it is pre-
The surrounding Jing Qiang of stress forms the partially prestressed concrete " beam lattice " that can effectively resist complicated force status.
First section 1 middle and lower part surrounding Jing Qiang disposed inboard double flange of the partially prestressed concrete open caisson section construction, it is first
1 internal partition wall middle and lower part two sides of partially prestressed concrete open caisson section arrangement double flange construction is saved, and in double flange construction
It is disposed with stiffener in flange and forms collar tie beam structure, the effect of double flange construction is the back cover of build-in open caisson after-pouring in place
Concrete is allowed to effective connection with first section caisson structure, and promotes globality, bearing capacity and the cracking resistance of first section caisson structure
Performance.
The first section partially prestressed concrete open caisson section 1 is first in the support of four angle point of rectangular open caisson head section, circular open caisson
Save four-point supporting, the support of end round or ellipse garden end operating condition under, the degree of prestressing of Jing Qiang is allowable tensile stress but not
Cracking, corresponds to A class prestressed component, and internal partition wall degree of prestressing is to allow to crack but fracture width does not transfinite, and it is pre- to correspond to B class
Stress members.
The prestressed concrete open caisson knot for connecing high part prestressed concrete or ordinary reinforced concrete open caisson section 2
Structure or reinforced concrete open caisson structure are made of the Jing Qiang and the internal partition wall being arranged in the middle part of open caisson for being arranged in open caisson surrounding, are connect
The Jing Qiang and internal partition wall of high part prestressed concrete or ordinary reinforced concrete open caisson section 2 are mixed with head section partial prestressing respectively
The Jing Qiang of solidifying soil open caisson section and internal partition wall matching, wherein according to heavy in the Jing Qiang and internal partition wall of prestressed concrete caisson structure
Well construction needs to be arranged or be not provided with prestressed strand.
As shown in Figure 2 and Figure 3, the Covered with Angles sword of the first section bottom partially prestressed concrete open caisson section surrounding Jing Qiang
Foot is inside monocline slope blade foot 5, and the Covered with Angles blade foot of internal partition wall bottom is sloped sides blade foot 4, head section partial prestressing coagulation
The Covered with Angles blade foot of native open caisson section surrounding Jing Qiang and internal partition wall bottom adopts the armored concrete knot of the steel plate of outsourcing 1-3cm thickness
Structure, encased steel plate inside welding regular reinforcement or overlap joint reinforce steel plate and are connected with inner concrete steel mesh 7.
The prestressed strand 3 is arranged in the bottom of surrounding Jing Qiang and middle part internal partition wall wall, and disperses to be anchored in well
The wall end 8 of wall, the prestressed strand is arranged in a manner of bending up upwards to the both ends of Jing Qiang, is opened using post stretching
It draws, wherein the tensioning at 35cm-200cm above the blade foot of prestressed strand 3 in head section partially prestressed concrete open caisson section 1,
2-4 beam is set in arranged in rows, an arrangement, and every beam includes 7-19 root nominal diameter 15.2mm prestress wire, the prestress steel twist
The tensile strength of line is 1720-1960MPa.
The quantity that the prestress wire is specifically arranged should combine caisson structure feature, result of finite element and show
Condition of construction determines, specific prestress wire arrangement quantity should in conjunction with result of finite element, caisson structure feature and
Site operation situation determines.In addition, to resist the construction risks such as the partial collapse of the substrate soil body, founding, it can be along borehole wall bottom section
Appropriate increase, more arrangement prestress steel strand wires.
The thickness of the protective layer of arrangement prestress steel beam is not less than in the surrounding Jing Qiang and middle part internal partition wall wall
0.2m, while the prestressed strand curved start point distance end anchor solid point distance is not less than 2m, transfer angle is not more than 30 degree.
Preferably, described connect has poured open caisson in high part prestressed concrete or ordinary reinforced concrete open caisson section 2
Cover board 6.
Above-mentioned well foundation, it is 4000-10000m2 that the partially prestressed concrete caisson structure, which is suitable for the area of plane,
Large-scale rectangular, circle, ellipse, end circular open caisson basis, it is heavy in particular by the large size of traditional " the big the bottom of a pan " method for sinking
Well basis.The partially prestressed concrete caisson structure of the lower part cooperates post-tensioning using C40-C60 high strength concrete
Method prestress system is mainly arranged in the surrounding Jing Qiang of open caisson head section and the bottom of middle part internal partition wall, chooses arrangement prestress
Middle part internal partition wall forms " cross " beam, forms partial prestressing " beam lattice " with the surrounding Jing Qiang of same arrangement prestress, effectively supports
Drive complicated force status.Prestressed strand is arranged in the bottom in the middle part of surrounding Jing Qiang and middle part internal partition wall wall, and in wall
Both ends bend up dispersion upwards and are anchored in wall end.
Above-mentioned well foundation simultaneously, the partial prestressing system are mainly arranged in open caisson and just sink on segment, subsequent standards
Section decides whether arrangement prestress according to the loading characteristic of caisson structure when sinking and in conjunction with result of finite element.It is described pre- to answer
Power steel strand wires are arranged at open caisson partition wall bottom.The prestress wire is bent downwardly, and parabolically or batten is bent
Line is arranged and tensioning.
A kind of construction method of super plane area portions prestressed concrete well foundation, it is comprised the steps of:
S1, according to engineering demand design plane area be 4000-10000m2Large-scale gravity type well foundation size, really
Determine the quantity of open caisson vertically and horizontally partition wall；
S2, open caisson warehouse quantity is determined according to the quantity of vertically and horizontally partition wall, steel strand wires is chosen according to well storehouse reasonable quantity
Arrangement, H1-H3 is cross wall number in Fig. 4-6, and Z1-Z4 is vertical wall number.In outer partition wall and internal partition wall most intermediate one in length and breadth
The partition wall bottom arrangement prestress steel strand wires of column or two column (Z1 and K1), open caisson exterior wall arrangement prestress steel strand wires are round or ellipse
Circular open caisson is arranged using " cross " shape.The prestress wire in the relatively small individual well storehouse of the area of plane uses " cross " shape cloth
It sets, the prestress wire in the relatively large twin-well storehouse of the area of plane is arranged using " diesis " shape；As shown in figure 4, the structure
For rectangle list " cross " prestressed strand plane of arrangement schematic diagram, as shown in figure 5, the structure is bis- " cross " prestress steels of rectangle
Beam plane of arrangement schematic diagram, as shown in fig. 6, the structure is oval single " cross " prestressed strand plane of arrangement schematic diagram.
S3, first section partially prestressed concrete open caisson section is determined according to open caisson warehouse quantity and connects high part prestressing force and is mixed
The length of solidifying soil or ordinary reinforced concrete open caisson section；Steel strand wires arrangement chooses " cross " shape cloth according to well storehouse reasonable quantity
It sets, the arrangement that " diesis " shape arrangement setting " more crosses " shape is arranged, i.e., in outer partition wall and internal partition wall most intermediate one in length and breadth
The partition wall bottom arrangement prestress steel strand wires of column or two column, open caisson exterior wall arrangement prestress steel strand wires.Specific prestress steel twist
Line arranges that quantity should be determined in conjunction with result of finite element, caisson structure feature and site operation situation, meanwhile, it can be along borehole wall bottom
The more arrangement prestress steel strand wires in portion region, and then prestress hole is reserved using prestressing tendon plastic film capicitor in support concrete
Road, the beam number of the prestress wire according to needed for specific open caisson is configured when duct is reserved.When blade foot designs, above blade foot
Two rows of tenons are set, and blade foot lower end is steel construction；
S4, installation open caisson bracket, template, steel blade foot and prestressed plastic corrugated pipe, assembling reinforcement simultaneously pour open caisson just head
Partially prestressed concrete open caisson section concrete is saved, post stretching stretch-draw prestressing force steel feet line and anchor are used after the completion of concrete curing
Gu；
S5, each wellhole are excavated take soil simultaneously, shallow " the big the bottom of a pan " support conditions of the intermediate deep surrounding of formation, at the beginning of head saves open caisson section
Beginning sinks down into specified absolute altitude, be followed by high first standard segment to specified absolute altitude, recycled with this, it is heavy eventually to be finally reached open caisson,
Concrete sealing bottom fills and pours well lid.The open caisson pours connect high open caisson knot on it after head section well sinking is in place
Structure connects high open caisson section and does not arrange or arrange centainly according to the loading characteristic of caisson structure when sinking and in conjunction with result of finite element
Measure prestressed strand.
It is (just heavy that the partial prestressing system of the utility model is mainly arranged in first section partially prestressed concrete open caisson section 1
Segment) in, it connects high part prestressed concrete or ordinary reinforced concrete open caisson section 2 (standard segment) exists according to caisson structure
Loading characteristic combination result of finite element when " the big the bottom of a pan " sinks is not arranged or few arrangement prestress；The partial prestressing
System well sinking method as described in partition wall and the prestress steel of borehole wall bottom arrangement is using high segmented sinking method is repeatedly connect, i.e.,
First sink just heavy segment to designated position, then connects high subsequent each standard segment and successively sink down into designated position, until completing
It is heavy eventually.Vertical, horizontal of the prestress wire in open caisson partition wall bottom is arranged, the relatively small individual well of the area of plane
The prestress wire in storehouse arranges that the prestress wire in the relatively large twin-well storehouse of the area of plane is used using " cross " shape
" diesis " shape arrangement.
The structure of the utility model has excellent cracking resistance.The large-scale well-sinking basis can be in whole subsidence process
It is excavated using " the big the bottom of a pan ", construction can be facilitated and accelerates sinking and speed of application；Due to part prestress system in caisson structure
Presence, the safety of caisson structure can also be ensured；After introducing portion prestress system, open caisson in sinking watching, by
Power is more reasonable, significantly improves excavating anti-cracking performance uneven, under substrate soil body collapsing unusual service condition, trave plane can
To be designed bigger, facilitates construction, reduce cost.
The above is only the preferred embodiment of the utility model, it should be understood that the utility model is not limited to herein
Disclosed form, should not be regarded as an exclusion of other examples, and can be used for other combinations, modifications, and environments, and
Can be in contemplated scope described herein, modifications can be made through the above teachings or related fields of technology or knowledge.And this field
The modifications and changes that personnel are carried out do not depart from the spirit and scope of the utility model, then all should be in right appended by the utility model
It is required that protection scope in.
Claims (8)
1. a kind of super plane area portions prestressed concrete well foundation, which is characterized in that it includes the first section portion of lower part
Point prestressed concrete open caisson section (1) and disposed thereon connect high part prestressed concrete or ordinary reinforced concrete open caisson section
(2), wherein head section partially prestressed concrete open caisson section (1) uses partially prestressed concrete structures, and the structure is by being arranged in
The internal partition wall composition of the Jing Qiang of open caisson surrounding and in length and breadth arranged crosswise in the middle part of open caisson, wherein the Jing Qiang and internal partition wall are adopted
Cooperate post-stressed system with C40-C60 high strength concrete, is provided with prestressed strand in Jing Qiang and internal partition wall
(3), being disposed with the middle part of prestressed strand, vertically and horizontally internal partition wall forms partial prestressing " cross " beam, should be " rood beam " and same
The surrounding Jing Qiang of sample arrangement prestress forms the partially prestressed concrete " beam lattice " that can effectively resist complicated force status.
2. a kind of super plane area portions prestressed concrete well foundation according to claim 1, which is characterized in that
The bottom of first section partially prestressed concrete open caisson section (1) is provided with steel blade foot, and head section partially prestressed concrete is heavy
The middle and upper part of well section (1) is provided with double flange construction.
3. a kind of super plane area portions prestressed concrete well foundation according to claim 1, which is characterized in that
First section partially prestressed concrete open caisson section (1) is in the support of four angle point of rectangular open caisson head section, 4 points of circular open caisson head section
Under the operating condition that support, end round or ellipse garden end support, the degree of prestressing of Jing Qiang is allowable tensile stress but does not crack, right
It should be A class prestressed component, internal partition wall degree of prestressing is to allow to crack but fracture width does not transfinite, and corresponds to B class prestressing force structure
Part.
4. a kind of super plane area portions prestressed concrete well foundation according to claim 1, which is characterized in that
The prestressed concrete caisson structure for connecing high part prestressed concrete or ordinary reinforced concrete open caisson section (2) or
Reinforced concrete open caisson structure is made of the Jing Qiang and the internal partition wall being arranged in the middle part of open caisson for being arranged in open caisson surrounding, connects high part
The Jing Qiang and internal partition wall of prestressed concrete or ordinary reinforced concrete open caisson section (2) save partially prestressed concrete with head respectively
The Jing Qiang and internal partition wall of open caisson section are matched, wherein according to open caisson knot in the Jing Qiang and internal partition wall of prestressed concrete caisson structure
Structure needs to be arranged or be not provided with prestressed strand.
5. a kind of super plane area portions prestressed concrete well foundation according to claim 2, which is characterized in that
The Covered with Angles blade foot of the first section bottom partially prestressed concrete open caisson section surrounding Jing Qiang is inside monocline slope blade foot (5),
The Covered with Angles blade foot of internal partition wall bottom be sloped sides blade foot (4), head section partially prestressed concrete open caisson section surrounding Jing Qiang and
The Covered with Angles blade foot of internal partition wall bottom adopts the reinforced concrete structure of the steel plate of outsourcing 1-3cm thickness, weldering on the inside of the encased steel plate
It connects regular reinforcement or overlap joint reinforces steel plate and is connected with inner concrete steel mesh (7).
6. a kind of super plane area portions prestressed concrete well foundation according to claim 2, which is characterized in that
First section partially prestressed concrete open caisson section (1) middle and lower part surrounding Jing Qiang disposed inboard double flange construction, head section part
Double flange construction is arranged in prestressed concrete open caisson section (1) internal partition wall middle and lower part two sides, and in the flange of double flange construction
It is inside disposed with stiffener and forms collar tie beam structure, the effect of double flange construction is the back cover coagulation of build-in open caisson after-pouring in place
Soil is allowed to effective connection with first section caisson structure, and promotes globality, bearing capacity and the cracking resistance of first section caisson structure.
7. a kind of super plane area portions prestressed concrete well foundation according to claim 1 or 2, feature exist
In the prestressed strand (3) is arranged in the bottom of surrounding Jing Qiang and middle part internal partition wall wall, and disperses to be anchored in Jing Qiang's
Wall end (8), the prestressed strand is arranged in a manner of bending up upwards to the both ends of Jing Qiang, is opened using post stretching
It draws, wherein the prestressed strand (3) in head section partially prestressed concrete open caisson section (1) is above the blade foot at 35cm-200cm
2-4 beam is set in tensioning, arranged in rows, an arrangement, and every beam includes 7-19 root nominal diameter 15.2mm prestress wire, the prestressing force
The tensile strength of steel strand wires is 1720-1960MPa.
8. a kind of super plane area portions prestressed concrete well foundation according to claim 6, which is characterized in that
The thickness of the protective layer of arrangement prestress steel beam is not less than 0.2m in the surrounding Jing Qiang and middle part internal partition wall wall, simultaneously should
Prestressed strand curved start point distance end anchor solid point distance is not less than 2m, and transfer angle is not more than 30 degree.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109098201A (en) * | 2018-10-12 | 2018-12-28 | 西南交通大学 | A kind of super plane area portions prestressed concrete well foundation and its construction method |
| CN111074925A (en) * | 2020-01-21 | 2020-04-28 | 中建桥梁有限公司 | Construction method of suspension bridge gravity type anchorage porous annular foundation |
| CN113700614A (en) * | 2021-09-16 | 2021-11-26 | 华能(浙江)能源开发有限公司清洁能源分公司 | Gravity type foundation for offshore wind power |
| CN115012394A (en) * | 2022-06-15 | 2022-09-06 | 福州市规划设计研究院集团有限公司 | Prestressed steel plate concrete underground continuous wall and design and construction method thereof |
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2018
- 2018-10-12 CN CN201821658881.6U patent/CN208965572U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109098201A (en) * | 2018-10-12 | 2018-12-28 | 西南交通大学 | A kind of super plane area portions prestressed concrete well foundation and its construction method |
| CN111074925A (en) * | 2020-01-21 | 2020-04-28 | 中建桥梁有限公司 | Construction method of suspension bridge gravity type anchorage porous annular foundation |
| CN113700614A (en) * | 2021-09-16 | 2021-11-26 | 华能(浙江)能源开发有限公司清洁能源分公司 | Gravity type foundation for offshore wind power |
| CN115012394A (en) * | 2022-06-15 | 2022-09-06 | 福州市规划设计研究院集团有限公司 | Prestressed steel plate concrete underground continuous wall and design and construction method thereof |
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