CN211690397U - Anti-floating single-wall steel hanging box - Google Patents
Anti-floating single-wall steel hanging box Download PDFInfo
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- CN211690397U CN211690397U CN201922198393.2U CN201922198393U CN211690397U CN 211690397 U CN211690397 U CN 211690397U CN 201922198393 U CN201922198393 U CN 201922198393U CN 211690397 U CN211690397 U CN 211690397U
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Abstract
The utility model relates to an anti-floating single-wall steel hanging box, which comprises a bottom plate, side plates, an inner support, a ring beam, a lowering system and a steel casing, wherein a bottom sealing concrete layer is poured on the bottom plate; the bottom plate comprises a bottom keel and a steel panel, the bottom keel is supported on a temporary support frame welded on the steel casing, the steel panel is laid and fixed on the bottom keel and is formed by welding a plurality of steel plates, and a casing hole is reserved in a position corresponding to the steel casing, so that the steel casing can penetrate through the steel panel; in the pile casing hole, an annular plate is laid in a gap between the steel pile casing and the steel panel to increase the contact area of the bottom sealing concrete layer, the steel pile casing and the steel panel; and the bottom plate is also provided with an anti-floating-sinking pull rod which is arranged around the steel casing and is connected with a bracket of a distribution beam preset on the steel casing. The utility model discloses a connection structure between protecting a section of thick bamboo to its bottom plate structure and bottom plate and steel optimizes, has improved the anti ability of floating and sinking of single wall steel hanging box.
Description
Technical Field
The utility model belongs to the technical field of single wall steel hangs case, the anti single wall steel that floats and sink that concretely relates to deep water cushion cap, pier stud construction were used hangs case.
Background
At present, a cofferdam is constructed in a water area according to the characteristics of hydrological data when a bridge lower structure is constructed. The waterproof structure layer is formed in the construction area of the structure, so that the normal operation of the construction process is ensured. In the current hot tide of large-scale and high-requirement bridge construction across sea, river and the like, when construction is carried out in a deep water environment, the prior art mature soil and wood cofferdams and the steel sheet pile cofferdams with requirements on water depth cannot meet the construction requirements, and steel hanging box cofferdams are mostly selected for construction under the working conditions, so that the construction method is particularly suitable for construction of structures such as deep-water high-height pile bearing platforms. And selecting a single-wall steel cofferdam or a double-wall steel cofferdam according to the height of the water level and the size of the construction load.
The common steel hanging box cofferdam has the following defects: the structure is complicated, required precision is high, can not dismantle and cause extravagant, fragile stake or hanging box, when meetting the tide fluctuation range and reaching, strong water current impact, hanging box easily because of not enough with the anchor power of stake, lead to sinking and the spud suffers destruction.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an anti single wall steel of floating and sinking hangs case optimizes through the connection structure who protects between a section of thick bamboo to its floor construction and bottom plate and steel, has improved the anti floating and sinking ability that single wall steel hung the case.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: an anti-floating single-wall steel hanging box comprises a bottom plate, side plates, an inner support, a ring beam, a lowering system and a steel casing, wherein a bottom sealing concrete layer is poured on the bottom plate; the bottom plate comprises a bottom keel and a steel panel, the bottom keel is supported on a temporary support frame welded on the steel casing, the steel panel is laid and fixed on the bottom keel and is formed by welding a plurality of steel plates, and a casing hole is reserved in a position corresponding to the steel casing, so that the steel casing can penetrate through the steel panel; in the pile casing hole, an annular plate is laid in a gap between the steel pile casing and the steel panel to increase the contact area of the bottom sealing concrete layer, the steel pile casing and the steel panel; and the bottom plate is also provided with an anti-floating-sinking pull rod which is arranged around the steel casing and is connected with a bracket of a distribution beam preset on the steel casing.
The bottom keel is of a grid structure formed by welding profile steels, stiffening ribs are welded between adjacent profile steels, the stiffening ribs on the periphery of the steel casing are arranged along the radial direction of the circumference of the steel casing, and the rest stiffening ribs are arranged along the transverse bridge direction.
The stiffening ribs are angle steels.
The annular plate is of an integral structure, or the annular plate is formed by overlapping a plurality of arc-shaped plates end to end.
And plugging materials are adopted between the annular plate and the steel casing and between the annular plate and the steel panel for plugging.
And a hanging point is reserved on the steel panel to connect the hanging rod.
The utility model has the advantages of following innovation point: in prior art, the reason that the steel hanging box appears floating and sinking easily is that the anchor power between steel hanging box and the pile foundation is not enough, consequently, the utility model discloses from the angle that improves the anchor power between steel hanging box and the pile foundation, carried out a series of improvements and ingenious design to relevant structure, thereby improved anchor power has overcome the impact of tide in-process tidal water to the steel hanging box, avoids sinking of steel hanging box, has also protected the pile foundation not destroyed.
The general diameter ratio of a protecting section of thick bamboo hole on the steel panel protects a diameter greatly to steel panel's installation, but steel protects a gap between section of thick bamboo and the protecting section of thick bamboo hole if not carry out the shutoff, when later stage back cover concrete placement, this gap department can leak the concrete, and gap department concrete can not pour the steel and protect a position moreover, makes steel panel and steel protect effective fixed connection between the section of thick bamboo. Therefore, in the prior art, the gap is generally blocked by the sand bag, but the surface of the blocked sand bag is uneven and easy to deform, and the firmness of the connection between the steel casing and the bottom plate through the concrete is affected. Therefore, the utility model discloses protect a gap between a hole and the steel casing at the steel panel and use the annular slab to block in addition, the annular slab is taken on the steel panel on the one hand like this, and the surface is comparatively level and smooth, does not have tall and big arch, has increased the area of contact that back cover concrete layer and steel casing and steel panel, has just also improved the firm degree of being connected between steel casing bottom and the bottom plate.
Except that the steel protects a bottom and links as an organic wholely through back cover concrete layer and steel face board, protects the anchor degree between a section of thick bamboo and the bottom plate for further strengthening the steel, the utility model discloses still set up anti superficial heavy pull rod on the bottom plate, anti superficial heavy pull rod lower extreme welding is on steel face board, and the upper end is passed through the pull rod and is connected with the bracket of predetermineeing on the steel protects a section of thick bamboo, and in addition, anti superficial heavy pull rod centers on the steel protects a setting, just so protects a fixed connection that the anchor point of a connection bottom plate that forms on upper portion at the steel, protects a fixed connection of upper portion realization and bottom plate at the steel.
The utility model discloses set up the stiffening rib on end fossil fragments, can improve end fossil fragments's support intensity and the ability of fighting the tide water impact to the stiffening rib protects a radial setting of section of thick bamboo around the steel along the steel, can improve the protective properties who protects a section of thick bamboo to the steel.
Drawings
Fig. 1 is an elevation view of the present invention in the direction of a transverse bridge;
FIG. 2 is a vertical view of the present invention in the direction of the bridge;
FIG. 3 is a layout view of the bottom plate of the present invention;
FIG. 4 is a schematic view of the arrangement of the surrounding structure of the steel casing according to the present invention;
the labels in the figure are: 1. the steel support comprises a bottom plate, 2, side plates, 3, a temporary bracket, 4, a steel casing, 5, an anti-floating and anti-sinking pull rod, 6, a Bailey beam group, 7, a suspension rod, 8, a distribution beam, 9, a bottom keel, 10, a steel panel, 11, a lower layer inner support, 12, an upper layer inner support, 13, an annular plate, 14, a stiffening rib, 15, a bottom die profile steel, 16 and a distribution beam bracket.
Detailed Description
The following detailed description of the present invention is provided with reference to the accompanying drawings and examples, but not to be construed as limiting the present invention in any way.
Referring to the attached drawings, the anti-floating and anti-sinking single-wall steel hanging box comprises a bottom plate 1, side plates 2, an inner support, ring beams, a lowering system, a distribution beam 8, a Bailey beam group 6 and a steel casing 4, wherein the bottom plate 1 comprises a bottom keel 9 and a steel panel 10, and the structure of the single-wall steel hanging box is explained in more detail from the assembly process of the single-wall steel hanging box.
Before the bottom keel 9 is constructed, the steel casing 4 is corrected, and the top surface of the steel casing 4 under the whole bearing platform is ensured to be at the same elevation.
On the elevation height of 1 assembling of steel hanging box bottom plate, protect a section of thick bamboo 4 at the steel and weld interim bracket 3 all around to add the bottom plate support shaped steel 15 that the welding level set up, interim bracket 3 and bottom plate support shaped steel 15 constitute the interim support frame that supports bottom plate 1 jointly, for convenient subsequent demolishs and retrieves, punch in advance at bottom die shaped steel 15 tip, when demolising, tie up wire rope on the hole that bottom plate supported shaped steel 15, can avoid interim support frame to fall into the aquatic.
And welding a distribution beam bracket 16 at the preset elevation of the steel casing 4, and stiffening the top suspension system of the steel casing, wherein the distribution beam bracket is welded with a stiffening plate used for stiffening.
The bottom keel 9 is formed by welding HM 340X 250 and HM 294X 200 section steels, and the HM 340X 250 section steels are used as main keels and are welded on the temporary support frame. The main keel is provided with a 5 cm-diameter hanging rod hole as a hanging point, the hanging rod hole corresponds to the hanging rod hole on the lower ring beam on the side plate 2, the position of the hanging hole is in accordance with the design during installation, and a section of phi 22 round steel pull rod with the length of 4m is pre-threaded on the hanging rod hole. After the bottom keel 9 is finished, angle steel with the angle of 75 multiplied by 50 multiplied by 6 is arranged in the cross bridge direction to serve as a stiffening rib 14, the distance between the stiffening ribs 14 is 350mm, wherein the stiffening rib 14 around the steel casing 4 is arranged perpendicular to the steel casing 14, namely the stiffening rib 14 is arranged along the radial direction of the steel casing 14 in the length direction.
A steel panel 10 with the thickness of 6mm is laid on the bottom keel 9, the steel panels 10 are spliced and welded with each other, the steel panel 10 is welded with the bottom keel 9, the steel panel 10 positioned at the position of the steel casing is a whole square steel plate, and a casing hole needs to be reserved in advance; the steel panel 10 should be welded to the bottom keel 9 with a sufficient length to ensure that the height of the weld is greater than 5 mm. The steel panel 10 is provided with a connection sleeve having a hanging hole as a hanging point for connecting with the hanging rod 7.
The distribution beam 8 adopts double-spliced HN 900X 300 section steel, and two distribution beams are arranged on the steel casing 4 on two sides of the transverse bridge of the bearing platform along the large and small mileage. The distribution beam 8 is fixedly connected with the steel casing 4 through the distribution beam bracket 16, and the distribution beam bracket and the distribution beam 8 can be connected in a welding mode.
The Bailey beam group 6 is a 4-12m standard Bailey beam, is arranged on the distribution beam 8, is totally provided with 8 groups along the bridge direction at an interval of 3m, and is firmly fixed with the distribution beam 8 by adopting a U-shaped clamp. The hanger rod 7 is made of phi 32 finish-rolled deformed steel bar, an anchoring shoulder pole beam is arranged on the distribution beam 8 and used for anchoring the hanger rod 7, and the whole steel hanging box system is hung by 80 finish-rolled deformed steel bars and is connected with a hanging hole of a connecting sleeve on the bottom plate 1.
The lowering system comprises a 30t penetrating jack, a phi 32 finish rolling deformed steel bar sling, a matched nut, a gasket, a reaction frame, a pad beam, a lifting point, a guide device and the like. This section is prior art and will not be described in great detail herein.
The side plates 2 are manufactured and installed in a steel template block mode, the side plates 2 are integrally divided into an upper layer and a lower layer, and the total height is 10 m. Wherein the height of the lower layer side plate is 4.8m, the height of the upper layer side plate is 5.2m, and the upper layer and the lower layer are connected by welding. The steel templates forming the side plates 2 are 8mm thick, transverse ribs and vertical ribs are arranged outside the steel templates, the vertical rib plates are 28b I-shaped steel, the transverse ribs are angle steel of 70 x 50 x 6, and the distance between the transverse ribs and the angle steel is 450 mm. The HM 588X 300 steel ring beams are arranged on the outer side of the 4.8m position of the lower layer side plate, the ring beams are provided with phi 23mm pull rod holes corresponding to the phi 23mm pull rod holes on the edge of the bottom keel 9, and after the side plate 2 is installed, phi 22 round steel is penetrated to be welded and connected with the corresponding round steel pull rod of the bottom plate.
When the side plates 2 are installed, the lower layer is installed firstly, the installation sequence is preferably that the side plates are installed from the angular point firstly, then the other sides of the angular points connected with the side plates are installed to form a stable structure, then the other angular points are symmetrically installed according to the same sequence, and then the steel templates connected with the side plates are installed.
Lower floor's curb plate can set up interim support to it when the installation to supplementary shaping prevents the steel form slope, and one end is fixed at the upper edge of steel form, and one end is fixed on bottom plate 1, and concrete quantity is according to 5m together. And after the hanging box is placed to the first preset height and the lower-layer inner support 11 is installed, the temporary support can be detached.
Two phi 20cm connecting devices are respectively arranged at the +0m elevation positions of the two ends of the lateral plate in the transverse bridge direction for adjusting the pressure difference between the seawater inside and outside the bottom sealing front suspension box.
Can carry out the installation of curb plate outer collar tie beam after the installation of lower floor curb plate is accomplished, the collar tie beam establishes two-layerly altogether, wherein the lower floor is located 4.8m more than the bottom plate 1, the upper strata is located 8.06m more than the bottom plate 1, straightway collar tie beam adopts H588 x 300 shaped steel, the circular arc section adopts 10mm steel sheet processing preparation, set up phi 23mm hole on the collar tie beam, correspond with bottom plate 1's davit hole, curb plate 2 accomplishes the installation back, wear phi 22 round steel and bottom plate 1 and correspond round steel pull rod welded connection.
After the installation of lower floor's curb plate finishes, can remove the interior support 11 of the interim bracket 3 in 1 below of bottom plate and the lower floor, the current ship of project utilization of demolishing of interim bracket 3 cuts off from 1 below of bottom plate, penetrates the preformed hole on the bottom plate support shaped steel 15 that links to each other with interim bracket 3 with wire rope in advance when cutting off, and is fixed firm on 1 upper portion of bottom plate, takes out from the preformed hole on 1 upper portion of bottom plate after interim bracket 3 cuts off. The first time of steel hanging box is transferred through jib 7 and leading sheave to utilization jack etc. and transfer highly for 3m, then support and upper curb plate in the installation. And after the upper layer side plate is installed, the upper layer side plate is placed to the designed elevation for the second time.
The inner supports are arranged in two layers, the inner support 11 in the lower layer is made of phi 426 multiplied by 10 steel pipes, the number of the inner supports is four, the inner support 12 in the upper layer is made of phi 500 multiplied by 10 steel pipes, the number of the inner supports in the upper layer is four, the upper support 11 in the upper layer and the lower support 12 in the lower layer are respectively the same as the level of an upper ring beam and the lower ring beam, the inner supports and the side plates 2 are connected in a welding mode, a 10mm steel plate is used as a stiffening plate at the welding position, and only.
In the pile casing hole, annular plate 13 has been laid to the gap between steel pile casing 4 and the steel face plate 10, annular plate 13 is overall structure, perhaps annular plate 13 is formed by polylith arc head and the tail overlap joint, and annular plate 13 supports on steel face plate 10, adopts cotton fibre or cloth shutoff between the circumference in annular plate 13 and the steel pile casing 4 and between the outer circumference of annular plate 13 and the steel face plate 10, then pours the back cover concrete.
The total thickness of the steel hanging box bottom sealing concrete is 2m, the concrete is sealed twice, the thickness of the bottom sealing is 1.8m when underwater concrete is used for sealing the bottom for the first time, the bottom sealing is dried and sealed after water pumping for the second time, the thickness of the bottom sealing is 0.2m, and the steel hanging box bottom sealing concrete is mainly used for leveling the bottom surface of a bearing platform.
After the pumping is finished and the bottom sealing concrete is checked to have no quality and potential safety hazards, the hoisting system is required to be dismantled, the suspender anchorage is gradually and slowly loosened during the dismantling, and the change condition of the hanging box is observed constantly. And after the hoisting system is dismantled, gradually dismantling the distribution beam 8 and the Bailey beam group 6, and cutting off the steel casing 4.
And after the construction of the bottom sealing concrete is finished, cutting off the redundant steel casing 4. After the steel casing 4 is cut off, the pile head is chiseled manually by matching with machinery, and the pile head is chiseled to be 20cm above the bottom surface of the bearing platform and the concrete is guaranteed to reach a fresh surface. And after the pile head is processed, cleaning and adjusting the pile head reinforcing steel bars.
Claims (6)
1. An anti-floating single-wall steel hanging box comprises a bottom plate (1), side plates (2), an inner support, a ring beam, a lowering system and a steel casing (4), wherein a bottom sealing concrete layer is poured on the bottom plate (1); the method is characterized in that: the bottom plate (1) comprises a bottom keel (9) and a steel panel (10), the bottom keel (9) is supported on a temporary support frame welded on the steel casing (4), the steel panel (10) is laid and fixed on the bottom keel (9), the steel panel (10) is formed by welding a plurality of steel plates in a splicing manner, and a casing hole is reserved in a position corresponding to the steel casing (4), so that the steel casing (4) can penetrate through the steel panel (10); in the pile casing hole, an annular plate (13) is laid in a gap between the steel pile casing (4) and the steel panel (10) so as to increase the contact area between the back cover concrete layer and the steel pile casing (4) and the steel panel (10); the bottom plate (1) is further provided with an anti-floating-sinking pull rod (5), and the anti-floating-sinking pull rod (5) is arranged around the steel casing (4) and connected with a distribution beam bracket (16) preset on the steel casing (4).
2. The anti-floating single-wall steel suspension box of claim 1, characterized in that: the bottom keel (9) is of a grid structure formed by welding profile steels, stiffening ribs (14) are welded between adjacent profile steels, the stiffening ribs (14) on the periphery of the steel casing (4) are arranged along the radial direction of the circumference of the steel casing (4), and the rest stiffening ribs (14) are arranged along the transverse bridge direction.
3. The anti-floating single-wall steel suspension box of claim 2, characterized in that: the stiffening ribs (14) are angle steels.
4. The anti-floating single-wall steel suspension box of claim 1, characterized in that: the annular plate (13) is of an integral structure, or the annular plate is formed by overlapping a plurality of arc-shaped plates end to end.
5. The anti-floating single-wall steel suspension box of claim 1, characterized in that: and plugging materials are adopted between the annular plate (13) and the steel casing (4) and between the annular plate (13) and the steel panel (10) for plugging.
6. The anti-floating single-wall steel suspension box of claim 1, characterized in that: and a hanging point is reserved on the steel panel (10) to connect the hanging rod (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922198393.2U CN211690397U (en) | 2019-12-10 | 2019-12-10 | Anti-floating single-wall steel hanging box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922198393.2U CN211690397U (en) | 2019-12-10 | 2019-12-10 | Anti-floating single-wall steel hanging box |
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| Publication Number | Publication Date |
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| CN211690397U true CN211690397U (en) | 2020-10-16 |
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| CN201922198393.2U Active CN211690397U (en) | 2019-12-10 | 2019-12-10 | Anti-floating single-wall steel hanging box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114319400A (en) * | 2022-02-17 | 2022-04-12 | 中交第三航务工程局有限公司 | Assembling and lowering process of steel cofferdam for underwater bearing platform construction |
-
2019
- 2019-12-10 CN CN201922198393.2U patent/CN211690397U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114319400A (en) * | 2022-02-17 | 2022-04-12 | 中交第三航务工程局有限公司 | Assembling and lowering process of steel cofferdam for underwater bearing platform construction |
| CN114319400B (en) * | 2022-02-17 | 2023-12-29 | 中交第三航务工程局有限公司 | Assembling and lowering process of steel cofferdam for underwater bearing platform construction |
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