CN109056530A - A kind of king-post base configuration being suitable for bridge tower on steep side slope - Google Patents
A kind of king-post base configuration being suitable for bridge tower on steep side slope Download PDFInfo
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- CN109056530A CN109056530A CN201811118501.4A CN201811118501A CN109056530A CN 109056530 A CN109056530 A CN 109056530A CN 201811118501 A CN201811118501 A CN 201811118501A CN 109056530 A CN109056530 A CN 109056530A
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- Prior art keywords
- king
- post
- bridge tower
- side slope
- steep side
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of king-post base configurations for being suitable for bridge tower on steep side slope, and including the single-pile foundation being connected to below left king-post and right king-post, each single-pile foundation is reinforced concrete structure.The bridge tower king-post basis that the present invention designs, it is very suitable for steep side slope bridge tower, it uses only column single pile to replace a clump of piles, and cancel cushion cap construction, king-post base profile size is reduced, basic slope excavating planar dimension is reduced, considerably reduces native stone excavated volume, the excavation workload of steep side slope is also reduced, construction safety risk is reduced.
Description
Technical field
The present invention relates to technical field of bridge engineering, in particular to a kind of king-post basis for being suitable for bridge tower on steep side slope
Construction.
Background technique
Bridge tower is the important component of suspension bridge, and bridge tower is not only subjected to outside the active force of main push-towing rope transmitting, is also subjected to
The load actions such as itself dead load, wind load, temperature, earthquake.Bridge tower internal force is transferred to ground, such as Fig. 1 by the king-post basis of bridge tower
Shown, the king-post basis of mountain area bridge tower generally uses multi-column pier foundation, in order to the interior of king-post (including left king-post 1 and right king-post 2)
Power is uniformly transferred to each foundation pile 4, and setting cushion cap 3 is needed between king-post and foundation pile 4.
Need to guarantee certain stake spacing when king-post basis uses multi-column pier foundation, between foundation pile 4, " railway bridges and culverts ground and
Foundation design code " (TB10093-2017) regulation: the center of (digging) hole perfusion friction pile is bored away from no less than 2.5 times design stakes
Diameter bores the center of (digging) hole perfusion stanchion away from no less than 2 times design stake diameters.Construction of Pylon of Long Span Suspension Bridge stress is huge, 4 numbers of foundation pile
More, therefore, the planar dimension of cushion cap 3 is accordingly more much bigger than king-post size.For mountain area steep side slope, bridge tower king-post uses group
When pile foundation, 3 slope excavating planar dimension of cushion cap is huge, and native stone earthwork is huge, serious to former slope failure, also increases
Construction cost and security risk.
Summary of the invention
When it is an object of the invention to overcome the steep side slope in the presence of the prior art using multi-column pier foundation, there is native stone
Earthwork is huge, serious to former slope failure, the big deficiency of construction risk, provides and a kind of is suitable for bridge tower on steep side slope
King-post base configuration.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes:
A kind of king-post base configuration being suitable for bridge tower on steep side slope, including be connected under left king-post and right king-post
The single-pile foundation of side, each single-pile foundation is reinforced concrete structure.
The bridge tower king-post basis that the present invention designs, is very suitable for steep side slope bridge tower, only column single pile is used to replace group
Stake, and cancel cushion cap construction, king-post base profile size is reduced, basic slope excavating planar dimension is reduced, greatly subtracts
Native stone excavated volume is lacked, has also reduced slope excavating workload, reduce construction safety risk.
Preferably, it is separately connected the apical side height of two single-pile foundations below the left king-post and right king-post not
Together, and the size of two single-pile foundations and size are different.
Due to that can be separately designed according to the difference of the parameters such as height, the gradient of two sides side slope using single-pile foundation
The single-pile foundation of different sizes, different installation sites out, this flexible and changeable property of single-pile foundation, especially suitable for steep side slope
Bridge tower, further ensures the reliability on basis, and reduces slope excavating risk.
Preferably, the single-pile foundation includes the basic top entity section being connected with king-post, the base being connected with ground
Plinth bottom entity section and basis middle part hollow section positioned there between, basic internal are arranged hollow section, can reduce concrete
The amount of pouring, save construction cost.
Preferably, the single-pile foundation is rectangular section, and the length and/or width dimensions of the rectangular section are 14m-
20m.Different from the circular cross-section that multi-column pier foundation and single-pile foundation generally use, present invention employs rectangular section, not only section
Composite bending modulus is big, and facilitates excavation.Further, the sectional dimension of common single-pile foundation is within 4m, and the present invention is by rectangle
The sectional dimension in section is extended to 14m-20m, to significantly increase bearing capacity.Although the section of single-pile foundation of the invention
Size is larger, but the overall dimensions relative to multi-column pier foundation, and the size of single-pile foundation is still smaller, so as to greatly subtract
Lack native stone excavated volume, also reduces slope excavating risk.
The invention also discloses one kind to be suitable for bridge tower on steep side slope comprising left king-post and right king-post and any
A kind of king-post base configuration
Compared with prior art, beneficial effects of the present invention:
The bridge tower king-post basis for inventing design, is very suitable for steep side slope bridge tower, only column single pile is used to replace a clump of piles,
And cancel cushion cap construction, king-post base profile size is reduced, basic slope excavating planar dimension is reduced, considerably reduces
Native stone excavated volume, also reduces slope excavating workload, reduces construction safety risk.
Due to that can be separately designed according to the difference of the parameters such as height, the gradient of two sides side slope using single-pile foundation
The single-pile foundation of different sizes, different installation sites out, this flexible and changeable property of single-pile foundation, especially suitable for steep side slope
Bridge tower, further ensures the reliability on basis, and reduces slope excavating risk.
Present invention employs rectangular sections, and not only section composite bending modulus is big, and facilitate excavation.Further, the present invention will
The sectional dimension of rectangular section is extended to 14m-20m, to significantly increase bearing capacity.
Detailed description of the invention:
Fig. 1 is the schematic diagram that king-post uses multi-column pier foundation in the prior art.
It is marked in Fig. 1: the left king-post of 1-, the right king-post of 2-, 3- cushion cap, 4- foundation pile.
Fig. 2 is a kind of schematic diagram of king-post base configuration for being suitable for bridge tower on steep side slope of the present invention.
Fig. 3 is the left view of Fig. 2.
Fig. 4 is the right view of Fig. 2.
Fig. 5 is the structural schematic diagram of single-pile foundation of the present invention.
Fig. 6 is the cross-sectional view of A-A section in Fig. 5.
Fig. 7 is the cross-sectional view of B-B section in Fig. 5.
Fig. 8 is stress balance figure of the single-pile foundation of the present invention in vertical direction.
Fig. 9 is single-pile foundation of the present invention stress balance figure in the horizontal direction.
It is marked in Fig. 2-Fig. 9: the left king-post of 1-, the right king-post of 2-, 3- single-pile foundation, the basis 31- top entity section, the basis 32-
Middle part hollow section, 33- foundation bottom entity section.
Specific embodiment
Below with reference to test example and specific embodiment, the present invention is described in further detail.But this should not be understood
It is all that this is belonged to based on the technology that the content of present invention is realized for the scope of the above subject matter of the present invention is limited to the following embodiments
The range of invention.
As shown in figs 2-4, a kind of king-post base configuration being suitable for bridge tower on steep side slope, including respectively in left king-post
1 and right king-post 2 below an only column single-pile foundation 3 being arranged, the single-pile foundation 3 is reinforced concrete structure.
The single-pile foundation 3 is rectangular section, and the length and/or width of the rectangular section are 14m-20m.And in order to suitable
The size of the natural parameters such as the gradient for answering two sides massif different, two single-pile foundations 3 in left and right can be different, and apical side height and bottom surface are high
Degree can also be different, and H is the difference in height of the apical side height of the two in figure.
As shown in Figure 5-Figure 7, the single-pile foundation 3 includes the basic top entity section 31 being connected with king-post, with ground
The foundation bottom entity section 33 being connected and basis middle part hollow section 32 positioned there between.
As shown in figure 8, the vertical internal force balance in king-post basis meets following formula:
N+G=∑ σ+∑ τ
Wherein, N is the vertical internal force on the basis of king-post acts on, the self weight based on G, and ∑ σ is that branch is resisted in basic bottom
The resultant force of load σ, the resultant force of the resistance frictional resistance τ of four side grounds based on ∑ τ.
As shown in figure 9, laterally or longitudinally Bending Moment balance meets following formula on king-post basis:
M=Mq
Wherein, M is that the moment of flexure of the moment of flexure and shearing generation on king-post exposure basis is total, MqFor the lateral resistance q of ground
The resist torque of generation.
Above embodiments are only to illustrate the present invention and not limit the technical scheme described by the invention, although this explanation
The present invention has been described in detail referring to above-mentioned each embodiment for book, but the present invention is not limited to above-mentioned specific implementation
Mode, therefore any couple of present invention modifies or equivalent replacement；And the technical side of all spirit and scope for not departing from invention
Case and its improvement, are intended to be within the scope of the claims of the invention.
Claims (7)
1. a kind of king-post base configuration for being suitable for bridge tower on steep side slope, which is characterized in that including being connected to left king-post
(1) single-pile foundation (3) and below right king-post (2), each single-pile foundation (3) is reinforced concrete structure.
2. a kind of king-post base configuration for being suitable for bridge tower on steep side slope according to claim 1, which is characterized in that point
It is different with the apical side height of two single-pile foundations (3) below right king-post (2) that the left king-post (1) is not connected.
3. a kind of king-post base configuration for being suitable for bridge tower on steep side slope according to claim 1, which is characterized in that point
The left king-post (1) is not connected and the size of two single-pile foundations (3) below right king-post (2) is different with size.
4. a kind of king-post base configuration for being suitable for bridge tower on steep side slope according to claim 1, which is characterized in that every
A single-pile foundation (3) includes the basic top entity section (31) being connected with king-post, the basic bottom being connected with ground
Portion's entity section (33) and basis middle part hollow section (32) positioned there between.
5. a kind of king-post base configuration for being suitable for bridge tower on steep side slope according to claim 1, which is characterized in that every
A single-pile foundation (3) is rectangular section.
6. a kind of king-post base configuration for being suitable for bridge tower on steep side slope according to claim 5, which is characterized in that institute
The length and/or width dimensions for stating rectangular section are 14m-20m.
7. one kind is suitable for bridge tower on steep side slope, which is characterized in that including left king-post (1) and right king-post (2), and it is such as above-mentioned
A kind of any king-post base configuration of claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811118501.4A CN109056530A (en) | 2018-09-25 | 2018-09-25 | A kind of king-post base configuration being suitable for bridge tower on steep side slope |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811118501.4A CN109056530A (en) | 2018-09-25 | 2018-09-25 | A kind of king-post base configuration being suitable for bridge tower on steep side slope |
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| CN109056530A true CN109056530A (en) | 2018-12-21 |
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| CN201811118501.4A Pending CN109056530A (en) | 2018-09-25 | 2018-09-25 | A kind of king-post base configuration being suitable for bridge tower on steep side slope |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113356054A (en) * | 2021-06-26 | 2021-09-07 | 山东省公路桥梁建设有限公司 | Cable tower and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113356054A (en) * | 2021-06-26 | 2021-09-07 | 山东省公路桥梁建设有限公司 | Cable tower and construction method thereof |
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