CN210049263U - Steel shell open caisson with blade foot filled with UHPC material - Google Patents
Steel shell open caisson with blade foot filled with UHPC material Download PDFInfo
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- CN210049263U CN210049263U CN201920270385.1U CN201920270385U CN210049263U CN 210049263 U CN210049263 U CN 210049263U CN 201920270385 U CN201920270385 U CN 201920270385U CN 210049263 U CN210049263 U CN 210049263U
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- open caisson
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Abstract
The utility model discloses a steel-shelled open caisson of UHPC material is filled to sword foot, it includes the steel-shelled open caisson body, the bottom terminal surface of steel-shelled open caisson body is provided with the sword foot that is used for with excavation basis direct contact, the inside cavity of open caisson body is provided with the partition wall of equipartition, the inside packing of cavity that sword foot and partition wall constitute has UHPC material obturator. The steel-shell open caisson has excellent mechanical performance of the whole structure in the sinking construction, the open caisson cutting edge is not easy to crack and deform, and the open caisson has strong shock resistance. And the blade foot of the steel shell open caisson meets the engineering requirements of convenience in processing and manufacturing, convenience in installation, rapidness in construction and the like.
Description
Technical Field
The utility model relates to an open caisson foundation field among the civil engineering, more specifically say the utility model relates to a steel-shelled open caisson of UHPC material is filled to sword foot.
Background
In the field of bridge construction, open caisson is adopted as a bridge foundation, and is more and more applied, particularly, for an ultra-large span bridge across rivers or sea, the open caisson foundation becomes the first choice of a main pier or an anchorage foundation due to the stability of the open caisson foundation, excellent bearing capacity and strong applicability to complex geological conditions.
The open caisson is easy to cause local scouring of the river bed under the action of water flow during the positioning, landing and sinking processes, and the condition of uneven support is easy to occur when the bottom opening of the open caisson is contacted with the surface of the river bed during the landing and sinking processes due to the large plane size of the open caisson; in addition, due to the influence of geological conditions at the pier position, the open caisson often has to adopt a method of taking out soil and sinking because of the difficulty in sinking, so that the support of the blade foot or the middle partition wall part is easy to be disengaged, and the blade foot cracking or the structural deformation of the open caisson in the construction process can be easily caused by all the above adverse factors. The ultra-high performance concrete (UHPC) is a novel cement-based material with high strength, high toughness and excellent durability, various mechanical property indexes of the UHPC material are between those of concrete and steel, and the UHPC material is applied to the open caisson, so that the safety problems of structural cracking and the like of the blade foot part due to insufficient tensile capacity of the concrete in the open caisson construction process can be solved.
With the increasing requirements of engineering on open caisson construction in a complex stratum environment, higher requirements are put forward on indexes such as durability and mechanical property of the open caisson. For this reason, it is necessary to upgrade the conventional concrete filled open caisson.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high-efficient device of fetching earth of atmospheric pressure caisson excavation, this steel-shelled open caisson overall structure mechanical properties is good in the construction of sinking, the difficult fracture deformation of open caisson sword foot, open caisson shock resistance is strong. And the blade foot of the steel shell open caisson meets the engineering requirements of convenience in processing and manufacturing, convenience in installation, rapidness in construction and the like.
In order to realize the technical characteristics, the purpose of the utility model is realized as follows: a steel shell open caisson with cutting edges filled with UHPC materials comprises a steel shell open caisson body, wherein the cutting edges which are in direct contact with an excavation foundation are arranged on the bottom end face of the steel shell open caisson body, partition walls are uniformly distributed in the inner cavity of the open caisson body, and a UHPC material filling body is filled in a cavity formed by the cutting edges and the partition walls.
The steel shell open caisson body is welded and spliced into a box body structure by adopting steel plate materials.
The bottom of the cutting edge is provided with a horizontal cutting edge tread, the outer side of the cutting edge is vertically parallel to a well wall, the inner side of the cutting edge is an inclined plane, and a UHPC material filling body is filled in an inclined plane cavity.
The bottom of the partition wall is filled with a filler of UHPC material, and the filling height of the partition wall is kept flush with the filling height inside the blade leg.
The UHPC material filler is prepared from cement, fly ash, silica fume, graded quartz fine sand, quartz powder, a high-efficiency water reducing agent and steel fibers.
The thickness of the steel plate of the steel shell open caisson body is 8-30 mm.
The horizontal edge foot tread width of the edge foot is 15-40 mm.
The inclination angle of the inner side of the blade foot is 45-60 degrees.
The grain diameter of the aggregate adopted by the UHPC material filling body is less than 600 mu m.
The utility model discloses there is following beneficial effect:
1. the utility model discloses a steel-shelled open caisson of UHPC material is filled to the sword foot, and traditional open caisson sword foot is compared to the steel-shelled open caisson sword foot of filling the UHPC material, and its structural strength and structural rigidity are showing the reinforcing, and then have ensured the security of steel-shelled open caisson body overall structure in the work progress that sinks.
2. The utility model discloses can improve the tensile ability of steel-shell open caisson body by a wide margin, the bearing capacity of reinforcing steel-shell open caisson sword foot provides the guarantee for the open caisson construction of sinking under complicated geological conditions.
3. The blade foot of the steel shell open caisson is convenient to process and manufacture, and can be used for quickly filling UHPC material on the top of the steel shell open caisson for quick construction.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a three-dimensional cross-sectional view of the blade foot and the partition wedge of the caisson of the present invention.
Fig. 2 is a plan view of the edge foot and the partition wedge of the sinking well of the present invention.
Fig. 3 is a three-dimensional section view of the middle steel-shell open caisson of the utility model.
Fig. 4 is the three-dimensional structure diagram of the middle steel-shell open caisson of the utility model.
In the figure: the open caisson comprises a steel shell open caisson body 1, a blade leg 2, a partition wall 3 and a UHPC material filling body 4.
Detailed Description
The following describes embodiments of the present invention with reference to the accompanying drawings.
Example 1:
referring to fig. 1-4, the steel-shell open caisson with the blade legs filled with the UHPC material comprises a steel-shell open caisson body 1, wherein the blade legs 2 which are directly contacted with an excavated foundation are arranged on the bottom end face of the steel-shell open caisson body 1, partition walls 3 which are uniformly distributed are arranged in an internal cavity of the open caisson body 1, and a UHpc material filling body 4 is filled in a cavity formed by the blade legs 2 and the partition walls 3. The UHPC material filling body 4 is filled at the blade foot 2 part of the steel shell open caisson adopting the structure, so that the structural strength of the open caisson is greatly improved, and the safety of the whole structure of the steel shell open caisson in the sinking construction process is ensured.
Further, the steel-shell open caisson body 1 is welded and spliced into a box structure by adopting a steel plate material. The steel plate material is welded to ensure the overall structural strength.
Further, a horizontal cutting edge tread is arranged at the bottom of the cutting edge 2, the outer side of the cutting edge 2 is vertically parallel to a well wall, the inner side of the cutting edge 2 is an inclined plane, and a UHPC material filling body 4 is filled in an inclined plane cavity.
Further, the bottom of the partition wall 3 is filled with a filler 4 of UHPC material, and the filling height of the partition wall is kept flush with the filling height inside the blade leg 2.
Further, the UHPC material filling body 4 is prepared by cement, fly ash, silica fume, graded quartz fine sand, quartz powder, a high-efficiency water reducing agent and steel fiber.
Further, the thickness of the steel plate of the steel shell open caisson body 1 is 8-30 mm.
Furthermore, the width of the horizontal blade foot tread of the blade foot 2 is 15-40 mm.
Further, the inclination angle of the inner side of the blade leg 2 is 45-60 degrees. Through adopting foretell inclination structure to guarantee that steel-shelled open caisson body 1 can be quick sinks, has improved its installation effectiveness.
Further, the filler 4 of UHPC material has aggregate with particle size less than 600 μm. The UHPC material filling body 4 with the structure greatly improves the tensile capacity of the steel shell open caisson body 1, enhances the bearing performance of the steel shell open caisson cutting edge, and provides guarantee for the open caisson sinking construction under complex geological conditions.
Example 2:
the construction method of the steel shell open caisson with the blade foot filled with the UHPC material is characterized by comprising the following steps:
the method comprises the following steps: installing the first section of the steel shell open caisson body 1;
step two: after the first section of the steel shell open caisson body 1 is transported to a construction station in a floating mode, mooring and positioning are carried out on the first section of the steel shell open caisson body;
step three: pouring a UHPC material filling body 4 with a certain height in the blade leg 2 and the partition wall 3;
step four: and (4) constructing according to the common construction sequence of sinking of the open caisson until all the steel shell open caisson bodies 1 are installed.
The above-mentioned embodiments are provided for explaining the present invention, and not for limiting the present invention, and any modifications and changes made to the present invention are within the spirit of the present invention and the scope of the claims and fall within the scope of the present invention.
Claims (8)
1. A steel shell open caisson with a cutting edge filled with UHPC material is characterized in that: the open caisson comprises a steel shell open caisson body (1), wherein the bottom end face of the steel shell open caisson body (1) is provided with cutting edges (2) which are used for directly contacting with an excavation foundation, the inner cavity of the open caisson body (1) is provided with uniformly distributed partition walls (3), and a UHPC material filling body (4) is filled in a cavity formed by the cutting edges (2) and the partition walls (3).
2. A steel-shelled caisson with its cutting edges filled with UHPC material according to claim 1, characterised in that: the steel shell open caisson body (1) is welded and spliced into a box body structure by adopting steel plate materials.
3. A steel-shelled caisson with its cutting edges filled with UHPC material according to claim 1, characterised in that: the bottom of the cutting edge (2) is provided with a horizontal cutting edge tread, the outer side of the cutting edge (2) is vertically parallel to a well wall, the inner side of the cutting edge (2) is an inclined plane, and a UHPC material filling body (4) is filled in an inclined plane cavity.
4. A steel-shelled caisson with its cutting edges filled with UHPC material according to claim 1, characterised in that: the bottom of the partition wall (3) is filled with a UHPC material filling body (4), and the filling height of the UHPC material filling body is kept flush with the filling height inside the blade leg (2).
5. A steel-shelled caisson with its cutting edges filled with UHPC material according to claim 1, characterised in that: the thickness of the steel plate of the steel shell open caisson body (1) is 8-30 mm.
6. A steel-shelled caisson with its cutting edges filled with UHPC material according to claim 1, characterised in that: the width of the horizontal blade foot tread of the blade foot (2) is 15-40 mm.
7. A steel-shelled caisson with its cutting edges filled with UHPC material according to claim 1, characterised in that: the inclination angle of the inner side of the blade foot (2) is 45-60 degrees.
8. A steel-shelled caisson with its cutting edges filled with UHPC material according to claim 1, characterised in that: the aggregate used by the UHPC material filling body (4) has the grain diameter less than 600 mu m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920270385.1U CN210049263U (en) | 2019-03-04 | 2019-03-04 | Steel shell open caisson with blade foot filled with UHPC material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920270385.1U CN210049263U (en) | 2019-03-04 | 2019-03-04 | Steel shell open caisson with blade foot filled with UHPC material |
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| CN210049263U true CN210049263U (en) | 2020-02-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109853602A (en) * | 2019-03-04 | 2019-06-07 | 中交第二航务工程局有限公司 | A kind of steel caisson and construction method of blade foot filling UHPC material |
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2019
- 2019-03-04 CN CN201920270385.1U patent/CN210049263U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109853602A (en) * | 2019-03-04 | 2019-06-07 | 中交第二航务工程局有限公司 | A kind of steel caisson and construction method of blade foot filling UHPC material |
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