CN210439154U - Anchoring structure for increasing bond strength of steel casing and steel casing box bottom sealing concrete - Google Patents
Anchoring structure for increasing bond strength of steel casing and steel casing box bottom sealing concrete Download PDFInfo
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- CN210439154U CN210439154U CN201920929461.5U CN201920929461U CN210439154U CN 210439154 U CN210439154 U CN 210439154U CN 201920929461 U CN201920929461 U CN 201920929461U CN 210439154 U CN210439154 U CN 210439154U
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Abstract
The utility model provides an anchor structure for increasing steel protects a section of thick bamboo and steel bushing box back cover concrete bond stress, protect a section of thick bamboo including a plurality of underwater pile foundation steels, the steel bushing box is the steel bushing box that has a bottom, hangs on the steel protects a section of thick bamboo, and steel bushing box bottom has been pour back cover concrete, evenly welds many anchor muscle parallel with steel protection section of thick bamboo axle center on every steel protects a section of thick bamboo outer wall, and the lower extreme of every anchor muscle is equipped with to the crooked crotch in the steel protection section of thick bamboo outside and pours in back cover concrete. The utility model discloses the cost that has been extremely low has improved the adhesion force between back cover concrete and the steel casing by a wide margin, has increased the one deck safety guarantee on the basis of theoretical safe value, can ensure construction safety.
Description
Technical Field
The utility model relates to a bridge aquatic cushion cap construction technical field, concretely relates to when adopting end steel jacket case to carry out aquatic cushion cap construction for increase the structure of bond stress between steel casing and the steel jacket case back cover concrete.
Background
The construction of the underwater bearing platform of the bridge usually adopts a steel sleeve box as a temporary water retaining structure, and the construction environment with deeper water level and thicker riverbed covering layer is generally designed into a high pile bearing platform and adopts the construction of the steel sleeve box with a bottom. When water in the steel sleeve box is drained, the bottom sealing concrete with the bottom steel sleeve box bears upward buoyancy, and after the first-layer bearing platform is poured, the downward vertical load of the bearing platform is borne. The bottom sealing concrete mainly depends on the bond stress between the steel casing and the bottom sealing concrete to bear the buoyancy and the bearing platform load, and the bond stress mainly depends on the thickness of the bottom sealing concrete, namely the bonding length of the bottom sealing concrete and the steel casing. During design, the thickness of the bottom sealing concrete is determined by an empirical calculation method according to the self weight of the bottom sealing concrete, the weight of the steel casing, the buoyancy of water, the weight of a bearing platform and the like, but a certain error always exists between a calculation result and a specific construction condition, and the buoyancy is not determined due to the fact that the water level changes irregularly during construction, so that the grip between the bottom sealing concrete and the steel casing is increased as much as possible on the premise that the thickness of the bottom sealing concrete is constant, the structural safety factor and the operation safety environment of operators are improved to the greatest extent, and the method has important significance.
Disclosure of Invention
An object of the utility model is to provide an anchor structure of a steel protects a section of thick bamboo and steel bushing box back cover concrete under the certain prerequisite of back cover concrete thickness, increases the bond stress between a steel protects a section of thick bamboo and the back cover concrete, ensures construction safety.
The technical scheme of the utility model as follows:
the utility model provides an anchor structure for increasing steel protects a section of thick bamboo and steel bushing box back cover concrete bond stress, includes a plurality of underwater pile foundation steel and protects a section of thick bamboo, the steel bushing box is with end steel pouring jacket, and the steel bushing box suspends in midair on the steel protects a section of thick bamboo, and steel bushing box bottom has pour one deck back cover concrete, its characterized in that: and a plurality of anchoring ribs parallel to the axis of the steel pile casing are uniformly welded on the outer wall of each steel pile casing, and the lower end of each anchoring rib is provided with a hook bent towards the outer side of the steel pile casing and poured in bottom sealing concrete.
The utility model discloses can be extremely low cost, increase substantially the bond stress between steel protects a section of thick bamboo and the back cover concrete, set up behind the anchor muscle back cover concrete and steel and protect the cohesive force between the section of thick bamboo and improve 3 times when not establishing, increased one deck safety guarantee again on the basis of theoretical safe value, make constructor's operation environment in the steel bushing incasement have very big safety guarantee.
Drawings
Fig. 1 is a schematic elevation structure of the present invention;
fig. 2 is a schematic plan view of the present invention.
Detailed Description
As shown in fig. 1 and 2, the utility model discloses a section of thick bamboo 1 is protected to a plurality of underwater pile foundation steel, and after the pile foundation construction was accomplished, lower steel pouring jacket 2 and carry out the cushion cap construction. The steel pouring jacket 2 is a steel pouring jacket with a bottom, the top of the steel pouring jacket is suspended on the steel casing 1 through a suspension rod, and a layer of bottom sealing concrete 3 is poured at the bottom of the steel pouring jacket 2; a plurality of anchoring ribs 4 parallel to the axis of the steel casing are uniformly welded on the outer wall of each steel casing 1, and the lower end of each anchoring rib 4 is provided with a hook 5 bending towards the outer side of the steel casing and poured in the bottom sealing concrete 3.
The utility model discloses during the concrete implementation, anchor muscle 4 can adopt phi 32 reinforcing bar, evenly welds 13 on every steel protects a section of thick bamboo, according to experimental data, can make the bonding force ratio between the back cover concrete and the steel protect a section of thick bamboo not establish the anchor muscle and increase 3 times.
The utility model discloses during the concrete implementation, before back cover concrete placement, earlier carry out the temporary fixation with steel casing spot welding on the anchor muscle about 50cm above the normal water level to guarantee anchor muscle length, make its lower extreme crotch part be located back cover concrete design position. And after the bottom sealing concrete is poured and the strength reaches 90%, pumping water in the steel sleeve box, and continuously welding the anchoring ribs on the upper part of the top of the bottom sealing concrete and the two sides of the steel casing in a full welding mode.
Claims (2)
1. The utility model provides an anchor structure for increasing steel protects a section of thick bamboo and steel bushing box back cover concrete bond stress, includes a plurality of underwater pile foundation steel and protects a section of thick bamboo, the steel bushing box is with end steel pouring jacket, and the steel bushing box suspends in midair on the steel protects a section of thick bamboo, and steel bushing box bottom has pour one deck back cover concrete, its characterized in that: and a plurality of anchoring ribs parallel to the axis of the steel pile casing are uniformly welded on the outer wall of each steel pile casing, and the lower end of each anchoring rib is provided with a hook bent towards the outer side of the steel pile casing and poured in bottom sealing concrete.
2. The anchoring structure for increasing the bond strength of the steel casing and the steel casing bottom-sealing concrete according to claim 1, wherein: and 13 anchoring ribs are welded on each steel casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920929461.5U CN210439154U (en) | 2019-06-19 | 2019-06-19 | Anchoring structure for increasing bond strength of steel casing and steel casing box bottom sealing concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920929461.5U CN210439154U (en) | 2019-06-19 | 2019-06-19 | Anchoring structure for increasing bond strength of steel casing and steel casing box bottom sealing concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210439154U true CN210439154U (en) | 2020-05-01 |
Family
ID=70403480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920929461.5U Active CN210439154U (en) | 2019-06-19 | 2019-06-19 | Anchoring structure for increasing bond strength of steel casing and steel casing box bottom sealing concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210439154U (en) |
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2019
- 2019-06-19 CN CN201920929461.5U patent/CN210439154U/en active Active
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