CN107217680A - The method for reducing the device and construction of steel suspended box cofferdam bottoming concrete thickness - Google Patents
The method for reducing the device and construction of steel suspended box cofferdam bottoming concrete thickness Download PDFInfo
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- CN107217680A CN107217680A CN201710344064.7A CN201710344064A CN107217680A CN 107217680 A CN107217680 A CN 107217680A CN 201710344064 A CN201710344064 A CN 201710344064A CN 107217680 A CN107217680 A CN 107217680A
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- steel
- collet
- box cofferdam
- suspended box
- sleeve
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention discloses a kind of device for reducing steel suspended box cofferdam bottoming concrete thickness, including steel suspended box cofferdam, steel pile casting, in addition to：Sleeve, it is the hollow circular cylinder coaxial with the steel suspended box cofferdam bottom outlet, and its outer wall is welded in the bottom outlet inwall of the steel suspended box cofferdam, and the sleeve upper and lower ends protrude from the bottom plate of the steel suspended box cofferdam, and the sleeve diameter is more than the external diameter of steel pile casting；Collet, it is loop configuration, and internal diameter is arranged to make the collet be fitted in the steel pile casting outer wall and can slide up and down, and external diameter is set greater than the external diameter of the sleeve；Steel wire rope is hung, its lower end hangs the collet；The invention also discloses the method constructed using this device.The present invention is effectively reduced the thickness of bottom concrete, at the same it is simple in construction, it is easy to operate.
Description
Technical field
The present invention relates to a kind of construction technology of steel suspended box cofferdam bottom concrete.It is more particularly related to one
The method for planting the device and construction that reduce steel suspended box cofferdam bottoming concrete thickness.
Background technology
Steel suspended box cofferdam is mainly used in river, river, lake, the construction of marine high-rise pile cap, and its major function is exactly to prevent water from entering
Enter cushion cap operation area, a kind of dry operating environment is provided for bearing platform construction.Its main construction techniques is：1st, steel lifted trunk decentralization in place,
Positioning；2nd, bottom concrete under water is poured；3rd, draw water；4th, bearing platform construction.The function of bottom concrete mainly has at 2 points：1st, keep off
Water, prevents water from pouring in cushion cap operation area below bottom plate；2nd, platform is provided for bearing platform construction, head difference is produced after carrying is drawn water
Raw uplift pressure and load when pouring cushion cap.
To realize both functions, bottom concrete must have certain thickness, could provide enough rigidity and
Bond stress (cohesive force between bottom concrete and steel pile casting).And in Practical Project, calculate past during bottoming concrete thickness
Past to be controlled by bond stress, the rigidity of concrete has certain rich degree, gives wasting sensation of constructing.
To solve the above problems, using while bottoming concrete thickness is reduced, increasing a kind of device and being held for raising
Power is wrapped up in, it is met construction requirement.
The content of the invention
It is an object of the invention to solve at least the above, and provide the advantage that at least will be described later.
It is a still further object of the present invention to provide a kind of device for being effectively reduced steel suspended box cofferdam bottoming concrete thickness
And the method constructed using this device, this device can improve the cohesive force of bottom concrete by increasing contact area,
So as to reduce the thickness for pouring bottom concrete.
In order to realize that reducing steel suspended box cofferdam back cover there is provided one kind according to object of the present invention and further advantage mixes
The device of solidifying soil thickness, including：Steel suspended box cofferdam, steel pile casting, it is characterised in that also include：Sleeve, it is and the steel lifted trunk
The coaxial hollow circular cylinder of cofferdam bottom outlet, its outer wall is welded in the bottom outlet inwall of the steel suspended box cofferdam, and above and below the sleeve
Two ends protrude from the bottom plate of the steel suspended box cofferdam, and the sleeve diameter is more than the external diameter of steel pile casting；Collet, it is ring junction
Structure, internal diameter is arranged to make the collet be fitted in the steel pile casting outer wall and can slide up and down, and external diameter is set greater than described
The external diameter of sleeve；Steel wire rope is hung, its lower end hangs the collet.
Preferably, the upper end of the sleeve is higher than the steel suspended box cofferdam plate upper surface 0.3m~0.7m, the set
The bottom of cylinder is less than the steel suspended box cofferdam plate upper surface 1.0m~1.5m, the internal diameter of the sleeve and the steel pile casting external diameter
Between distance be 0.15m~0.35m.
Preferably, in addition to：End wall bracket, the end wall bracket is fixedly connected with the sleeve and the steel suspended box cofferdam bottom
Plate, and uniform ring sets a circle on the upper surface of the steel suspended box cofferdam bottom plate and lower surface.
Preferably, the collet lower surface uniform ring sets polylith gusset, and the gusset is by the cuboid plate on top with
The right-angled trapezium plate in portion is integrally formed, and the lower surface of the collet, and gusset are fixed in the upper end of the cuboid plate on the top
Distance inside and outside the cuboid plate on top between two ends is identical with the width of collet, the lower end of the cuboid plate on the top with it is described
The long base end of the right-angled trapezium plate of bottom coincide, and the right-angled trapezium plate of the bottom oblique waist edge towards the outer of the collet
Side；Wherein, 0.3m is smaller than between adjacent two pieces of gussets, the suspension centre spacing of the hanging steel wire rope lower end is no more than
1.5m。
Preferably, the collet is additionally provided with drum steel, and the top and bottom of the drum steel are and the collet
The lower surface centre position of the collet is fixed in concentric loop configuration, the upper end of the drum steel；Wherein described hanging
The suspension centre spacing of steel wire rope lower end is no more than 3m.
Preferably, the collet upper surface is additionally provided with downward the first annular groove, and first groove is lucky
The bottom of the sleeve can be engaged；The sleeve bottom end lateral wall is additionally provided with upward the second annular groove, described second
Groove can engage the outer wall of first groove just.
Preferably, first groove and second groove are that magnetic patch is constituted, and both magnetic on the contrary, so that
First groove attracts each other with second groove.
Preferably, the collet upper surface is additionally provided with the sealing rod of flexibility.
Present invention also offers a kind of side constructed using the device for reducing steel suspended box cofferdam bottoming concrete thickness
Method, it is characterised in that comprise the following steps：
Step 1) decentralization steel pile casting is to the position of setting, the construction drill stake in steel pile casting, until all drilled pile constructions
Finish；
Step 2) gusset or drum steel are welded in collet lower surface, and the bottom for hanging steel wire rope is fixed on collet,
Then outer wall of the collet along steel pile casting is hung with hanging steel wire rope and slides into lower section from the upper end of steel pile casting, the upper end of steel wire rope is hung
It is disposed through the otic placode hole of steel pile casting upper end outer wall and hangs on steel pile casting；Before bottom concrete is poured, when hanging
After the upper end of extension steel wire rope applies vertical pretightning force and fixed, when pouring bottom concrete, the collet can be with the set
Cylinder is seamless applying；
Step 3) the assembled steel suspended box cofferdam of steel pile casting is relied on, in steel suspended box cofferdam bottom outlet inwall welded sleeve, and hung in steel
Cofferdam plate upper surface welds end wall bracket with lower surface；
Step 4) after total is assembled, welding finishes, using lowering device by steel suspended box cofferdam transfer in place, positioning；
Step 5) pour before bottom concrete, in steel pile casting top opening lifting hanging steel wire rope, until to be adjacent to sleeve right for collet
Steel wire rope is hung in locking afterwards；
Step 6) underwater casting steel suspended box cofferdam bottom concrete, make it with steel suspended box cofferdam, steel pile casting, sleeve and
Collet combines integral；
Step 7) after bottom concrete intensity reaches design requirement, drawn water in steel suspended box cofferdam, cut bottom concrete
The hanging steel wire rope and steel pile casting on top, and carry out bearing platform construction.
Preferably, the step 2) also include：The first groove is welded in collet upper surface；The step 3) also include：
Under a bushing the second groove is welded on the lateral wall of end；The step 5) also include：In steel pile casting top opening lifting hanging steel wire rope,
The bottom of first groove catch sleeve, the second groove engages the outer wall of the first groove.
The present invention at least includes following beneficial effect：
1. the apparatus structure of the present invention is simple, strong operability.
2. the sleeve of the present invention adds the contact area between steel pile casting and bottom concrete, so as to effectively increase envelope
Bond stress between base concrete and steel pile casting, construction cost is reduced by reducing the thickness of bottom concrete.
3. the sleeve of the present invention has been welded on before water is entered on the bottom outlet inwall of steel suspended box cofferdam, directly lower water can be applied
Work, nor need to be improved steel pile casting.
4. the collet of the present invention tenses the vertical pretightning force of offer so as to seal up the bottom of sleeve by hanging steel wire rope, prevent
The only seepage of bottom concrete, it is not necessary to which the gap between the bottom outlet and steel pile casting of guard seal steel suspended box cofferdam is set again, and
And be strained and fixed by hanging steel wire rope, it is simple and convenient.
5. the collet lower surface of the present invention is fixed with gusset or drum steel, the rigidity of collet can be increased, mixed with adapting to back cover
The load of solidifying soil zone adapts to construct in the case of inclement condition.
6. the setting of the first groove and the second groove of the present invention can further strengthen collet and directly be sealed with sleeve, if
It is that magnetic patch is constituted to be set to, and both magnetic is on the contrary, energy better seal, simultaneously as magnetic conversely attracts each other, there is one
Fixed upward attraction, the vertical pretightning force that hanging steel wire rope needs to apply can be also reduced to a certain extent.
7. the collet upper surface of the present invention is additionally provided with the sealing rod of flexibility, it can further strengthen sealing, because sealedly
Quality is directly connected to the success or failure of quality and whole scheme that bottom concrete is poured.
Further advantage, target and the feature of the present invention embodies part by following explanation, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Brief description of the drawings
Fig. 1 is front view of the invention；
Fig. 2 is top view of the invention.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to specification text
Word can be implemented according to this.
It should be noted that in the description of the invention, term " transverse direction ", " longitudinal direction ", " on ", " under ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " is based on accompanying drawing institutes
The orientation or position relationship shown, is for only for ease of the description present invention and simplifies description, is not instruction or implies signified dress
Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the limit of the present invention
System.
As depicted in figs. 1 and 2, the invention provides a kind of device for reducing steel suspended box cofferdam bottoming concrete thickness, bag
Include：Steel suspended box cofferdam 5, steel pile casting 1, it is characterised in that also include：Sleeve 3, it is coaxial with the bottom outlet of steel suspended box cofferdam 5
Hollow circular cylinder, its outer wall is welded in the bottom outlet inwall of the steel suspended box cofferdam 5, and the upper and lower ends of the sleeve 3 are protruded
In the bottom plate of the steel suspended box cofferdam 5, the internal diameter of sleeve 3 is more than the external diameter of steel pile casting 1；Collet 6, it is loop configuration, interior
Footpath is arranged to make the collet 6 be fitted in the outer wall of steel pile casting 1 and can slide up and down, and external diameter is set greater than the sleeve
3 external diameter；Steel wire rope 2 is hung, its lower end hangs the collet 6.In this technical scheme, sleeve is directly welded at steel lifted trunk
On the bottom outlet inwall in cofferdam, the unit area cohesive force between bottom concrete and steel pile casting is a definite value, Wo Menyao in fact
Increase this total cohesive force, this contact area can only be increased, because casing diameter is fixed, we can only increase
Contact height between bottom concrete and steel pile casting, the lower end of sleeve protrudes from the bottom outlet certain altitude of steel suspended box cofferdam, from
And the sleeve of lower end can increase the contact area of bottom concrete, so as to improve the cohesive force of bottom concrete, reduce back cover and mix
The thickness of soil is coagulated, but the bottom concrete of this substrate there must be certain thickness, bottom concrete is except above saying
This cohesive force is outer (preventing cofferdam from drawing water overall to floating when constructing), and bottom concrete plate must also have certain rigidity, not so
Because the pressure that head is produced can cause concrete disintegrating when drawing water, water can enter inside cofferdam, this cofferdam function
Just fail, therefore the sleeve of upper end is too high without setting；Collet is tensed so as to seal the bottom of casing by hanging steel wire rope
Portion, prevents the seepage of bottom concrete, the outer wall of the internal diameter laminating steel pile casting of collet, and can be slided up and down along outer wall, both can be suitable
Profit decentralization collet can prevent the seepage of bottom concrete between collet and steel pile casting again.
In another technical scheme, the upper end of the sleeve 3 higher than the plate upper surface 0.3m of steel suspended box cofferdam 5~
0.7m, the bottom of the sleeve 3 is less than the plate upper surface 1.0m of the steel suspended box cofferdam 5~1.5m, the internal diameter of the sleeve 3 with
Distance between the external diameter of steel pile casting 1 is 0.15m~0.35m.In this technical scheme, the present invention is applied suitable for high-rise pile cap
Work, that is, cushion cap are suspended in water, below mud face of not entering, secondly, and present this cushion cap is general to be less than 10m from the water surface；By
Experiment is proved, rationally sets the altitude range of sleeve effectively can be reduced to bottoming concrete thickness from general 2m-2.5m
The 1m-1.5m of the present invention；The steel pile casting position that the present invention is provided all is theoretical position, and steel pile casting may be beaten during practice of construction
It is askew, it is different with origin-location, so sleeve must be larger than steel pile casting, to adapt to this off normal, while sleeve is protected with steel
Bottom concrete in cylinder must have certain thickness, if thickness is too thin, the bond effect of bottom concrete is undesirable, also
Do not reach the effect of increase bottom concrete cohesive force, the effect for effectively reducing bottoming concrete thickness is not reached finally yet.
In another technical scheme, in addition to：End wall bracket 4, the end wall bracket 4 is fixedly connected with the sleeve 3 and the steel
The bottom plate of suspension box-cofferdam 5, and uniform ring sets a circle on the upper surface of the bottom plate of steel suspended box cofferdam 5 and lower surface.In this skill
In art scheme, the effect of sleeve is exactly to increase the contact height of bottom concrete and casing face, improves the bonding of bottom concrete
Power, steel suspended box cofferdam is transferred in place from platform, to enter water, is had the effect such as current and wave, can be allowed steel suspended box cofferdam in this mistake
Vacillated now to the left, now to the right in journey, shock is had between steel pile casting and sleeve, if do not supported, this block steel plate of sleeve is easily deformed even
Destruction, while can also increase the coupling stiffness of sleeve and steel suspended box cofferdam bottom plate, it is ensured that sleeve is not destroyed in work progress.
In another technical scheme, the lower surface uniform ring of collet 6 sets polylith gusset, and the gusset is by the rectangular of top
The right-angled trapezium plate of body plate and bottom is integrally formed, and the following table of the collet 6 is fixed in the upper end of the cuboid plate on the top
Distance inside and outside face, and the cuboid plate on gusset top between two ends is identical with the width of collet 6, the cuboid plate on the top
The long base end of the right-angled trapezium plate of lower end and the bottom coincide, and the right-angled trapezium plate of the bottom oblique waist edge towards institute
State the outside of collet 6；Wherein, being smaller than between 0.3m, the suspension centre of the lower end of hanging steel wire rope 2 between adjacent two pieces of gussets
Away from no more than 1.5m.In this technical scheme, the rigidity of collet is also crucial, if rigidity is not enough possible to that envelope can not be supported
The load that base concrete is brought, is also just unable to reach sealed effect, therefore is provided with polylith gusset in collet lower surface, to add
The rigidity of strong collet, it is better than the effect that the simple thickness for increasing collet reaches, while can also save material, cost is reduced,
The inclined-plane of gusset is arranged on the outside of collet, there is certain angle of inclination, can reduce impulsive force of the water to collet, the technical program
The thickness of middle collet and gusset is the distance between 20mm, and the cuboid plate left and right ends on gusset top and the width phase of collet
Together, the spacing of hanging steel wire rope design of lifting points is also to be determined according to the gusset of collet bottom setting.
In another technical scheme, the collet 6 is additionally provided with drum steel, the top and bottom of the drum steel be with
The centre position of the lower surface of the collet 6 is fixed in the concentric loop configuration of the collet 6, the upper end of the drum steel；
The suspension centre spacing of wherein described hanging steel wire rope 2 lower end is no more than 3m.In this technical scheme, the thickness of the collet is
20mm, the shaped steel of model work 14 of the drum steel, it is welded in the centre position of collet lower surface, hanging steel wire rope lower end
Suspension centre spacing is also to be determined according to the drum steel of collet lower surface setting.
In another technical scheme, the upper surface of collet 6 is additionally provided with downward the first annular groove, described first
Groove can engage the bottom of the sleeve 3 just；It is recessed that the Basolateral wall of sleeve 3 is additionally provided with upward annular second
Groove, second groove can engage the outer wall of first groove just, and first groove and second groove are magnetic
Block is constituted, and both magnetic is on the contrary, so that first groove attracts each other with second groove.In this technical scheme
In, the setting of groove can further strengthen collet and directly be sealed with sleeve；It is set to be that magnetic patch is constituted, and both magnetic
On the contrary, energy better seal, simultaneously as magnetic conversely attracts each other, there is certain upward attraction, also can be to a certain degree
It is upper to reduce the upward pretightning force that hanging steel wire rope needs to apply.
In another technical scheme, the upper surface of collet 6 is additionally provided with the sealing rod of flexibility.In this technical scheme
In, the flexible sealed effect of sealing rod is set more preferably, because sealedly quality is directly connected to the matter that bottom concrete is poured
The success or failure of amount and whole scheme.
Present invention also offers a kind of side constructed using the device for reducing steel suspended box cofferdam bottoming concrete thickness
Method, it is characterised in that comprise the following steps：
Step 1) decentralization steel pile casting is to the position of setting, the construction drill stake in steel pile casting, until all drilled pile constructions
Finish；
Step 2) gusset or drum steel are welded in collet lower surface, and the bottom for hanging steel wire rope is fixed on collet,
Then outer wall of the collet along steel pile casting is hung with hanging steel wire rope and slides into lower section from the upper end of steel pile casting, the upper end of steel wire rope is hung
It is disposed through the otic placode hole of steel pile casting upper end outer wall and hangs on steel pile casting；Before bottom concrete is poured, when hanging
After the upper end of extension steel wire rope applies vertical pretightning force and fixed, when pouring bottom concrete, the collet can be with the set
Cylinder is seamless applying；
Step 3) the assembled steel suspended box cofferdam of steel pile casting is relied on, in steel suspended box cofferdam bottom outlet inwall welded sleeve, and hung in steel
Cofferdam plate upper surface welds end wall bracket with lower surface；
Step 4) after total is assembled, welding finishes, using lowering device by steel suspended box cofferdam transfer in place, positioning；
Step 5) pour before bottom concrete, in steel pile casting top opening lifting hanging steel wire rope, until to be adjacent to sleeve right for collet
Steel wire rope is hung in locking afterwards；
Step 6) underwater casting steel suspended box cofferdam bottom concrete, make it with steel suspended box cofferdam, steel pile casting, sleeve and
Collet combines integral；
Step 7) after bottom concrete intensity reaches design requirement, drawn water in steel suspended box cofferdam, cut bottom concrete
The hanging steel wire rope and steel pile casting on top, and carry out bearing platform construction.
In another technical scheme, the step 2) also include：The first groove is welded in collet upper surface；The step 3)
Also include：Under a bushing the second groove is welded on the lateral wall of end；The step 5) also include：In steel pile casting top opening lifting hanging steel
During cord, the bottom of the first groove catch sleeve, the second groove engages the outer wall of the first groove.
Although embodiment of the present invention is disclosed as above, it is not restricted in specification and embodiment listed
With it can be applied to various suitable the field of the invention completely, can be easily for those skilled in the art
Other modification is realized, therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not limited
In specific details and shown here as the legend with description.
Claims (10)
1. a kind of device for reducing steel suspended box cofferdam bottoming concrete thickness, including：Steel suspended box cofferdam, steel pile casting, its feature exist
In, in addition to：
Sleeve, it is the hollow circular cylinder coaxial with the steel suspended box cofferdam bottom outlet, and its outer wall is welded in the steel suspended box cofferdam
Bottom outlet inwall, and the sleeve upper and lower ends protrude from the bottom plate of the steel suspended box cofferdam, and the sleeve diameter is more than institute
State the external diameter of steel pile casting；
Collet, it is loop configuration, and internal diameter is arranged to make the collet be fitted in the steel pile casting outer wall and can slide up and down,
External diameter is set greater than the external diameter of the sleeve；
Steel wire rope is hung, its lower end hangs the collet.
2. the device of steel suspended box cofferdam bottoming concrete thickness is reduced as claimed in claim 1, it is characterised in that the sleeve
Upper end be higher than the steel suspended box cofferdam plate upper surface 0.3m~0.7m, the bottom of the sleeve is less than the steel suspended box cofferdam
Plate upper surface 1.0m~1.5m, the distance between the internal diameter of the sleeve and the steel pile casting external diameter is 0.15m~0.35m.
3. the device of steel suspended box cofferdam bottoming concrete thickness is reduced as claimed in claim 1, it is characterised in that also included：
End wall bracket, the end wall bracket is fixedly connected with the sleeve and the steel suspended box cofferdam bottom plate, and around the steel suspended box cofferdam bottom plate
Upper surface and lower surface on uniform ring set a circle.
4. the device of steel suspended box cofferdam bottoming concrete thickness is reduced as claimed in claim 1, it is characterised in that the collet
Lower surface uniform ring sets polylith gusset, and the gusset is integrally formed by the cuboid plate on top and the right-angled trapezium plate of bottom, institute
The lower surface of the collet is fixed in the upper end for stating the cuboid plate on top, and inside and outside the cuboid plate on gusset top between two ends
Distance is identical with the width of collet, the lower end of the cuboid plate on the top and the long base end of the right-angled trapezium plate of the bottom
Coincide, and the right-angled trapezium plate of the bottom oblique waist edge towards the outside of the collet；Wherein, between adjacent two pieces of gussets
0.3m is smaller than, the suspension centre spacing of the hanging steel wire rope lower end is no more than 1.5m.
5. the device of steel suspended box cofferdam bottoming concrete thickness is reduced as claimed in claim 1, it is characterised in that the collet
Drum steel is additionally provided with, the top and bottom of the drum steel are and the concentric loop configuration of the collet, the drum
The lower surface centre position of the collet is fixed in the upper end of steel；Wherein, the suspension centre spacing of the hanging steel wire rope lower end does not surpass
Cross 3m.
6. the device of steel suspended box cofferdam bottoming concrete thickness is reduced as claimed in claim 1, it is characterised in that
The collet upper surface is additionally provided with downward the first annular groove, and first groove can engage the sleeve just
Bottom；
The sleeve bottom end lateral wall is additionally provided with upward the second annular groove, and second groove can engage described just
The outer wall of first groove.
7. the device of steel suspended box cofferdam bottoming concrete thickness is reduced as claimed in claim 6, it is characterised in that described first
Groove and second groove are that magnetic patch is constituted, and both magnetic is on the contrary, so that first groove and described second recessed
Groove attracts each other.
8. the device of steel suspended box cofferdam bottoming concrete thickness is reduced as claimed in claim 1, it is characterised in that the collet
Upper surface is additionally provided with the sealing rod of flexibility.
9. a kind of method constructed using the device for reducing steel suspended box cofferdam bottoming concrete thickness, it is characterised in that bag
Include following steps：
Step 1) decentralization steel pile casting is to the position of setting, the construction drill stake in steel pile casting, until all drilled pile constructions are finished；
Step 2) gusset or drum steel are welded in collet lower surface, and the bottom for hanging steel wire rope is fixed on collet, then
Outer wall of the collet along steel pile casting is hung with hanging steel wire rope and slides into lower section from the upper end of steel pile casting, the upper end of hanging steel wire rope is passed through
It is arranged at the otic placode hole of steel pile casting upper end outer wall and hangs on steel pile casting；Before bottom concrete is poured, when hanging steel
After the upper end of cord applies vertical pretightning force and fixed, when pouring bottom concrete, the collet can with the sleeve without
Seam laminating；
Step 3) the assembled steel suspended box cofferdam of steel pile casting is relied on, in steel suspended box cofferdam bottom outlet inwall welded sleeve, and enclosed in steel lifted trunk
Weir plate upper surface welds end wall bracket with lower surface；
Step 4) after total is assembled, welding finishes, using lowering device by steel suspended box cofferdam transfer in place, positioning；
Step 5) pour before bottom concrete, in steel pile casting top opening lifting hanging steel wire rope, until collet and sleeve are seamless applying
Then steel wire rope is hung in locking；
Step 6) underwater casting steel suspended box cofferdam bottom concrete, make itself and steel suspended box cofferdam, steel pile casting, sleeve and collet
With reference to integral；
Step 7) after bottom concrete intensity reaches design requirement, drawn water in steel suspended box cofferdam, cutting bottom concrete top
Hanging steel wire rope and steel pile casting, and carry out bearing platform construction.
10. the method that the device according to claim 9 for reducing steel suspended box cofferdam bottoming concrete thickness is constructed, its
It is characterised by,
The step 2) also include：The first groove is welded in collet upper surface；
The step 3) also include：Under a bushing the second groove is welded on the lateral wall of end；
The step 5) also include：In steel pile casting top opening lifting hanging steel wire rope, the bottom of the first groove catch sleeve, second
Groove engages the outer wall of the first groove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710344064.7A CN107217680B (en) | 2017-05-16 | 2017-05-16 | Device for reducing thickness of bottom sealing concrete of steel suspension box cofferdam and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710344064.7A CN107217680B (en) | 2017-05-16 | 2017-05-16 | Device for reducing thickness of bottom sealing concrete of steel suspension box cofferdam and construction method |
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| CN107217680B CN107217680B (en) | 2022-05-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107604933A (en) * | 2017-10-31 | 2018-01-19 | 中铁十六局集团第三工程有限公司 | One kind reclines formula steel boxed cofferdam |
| CN107905112A (en) * | 2017-11-30 | 2018-04-13 | 中铁大桥局集团第二工程有限公司 | A kind of not contour steel suspended box cofferdam base arrangement |
| CN115821954A (en) * | 2022-12-08 | 2023-03-21 | 保利长大工程有限公司 | Steel suspension box and positioning construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107905112A (en) * | 2017-11-30 | 2018-04-13 | 中铁大桥局集团第二工程有限公司 | A kind of not contour steel suspended box cofferdam base arrangement |
| CN107905112B (en) * | 2017-11-30 | 2024-03-01 | 中铁大桥局集团第二工程有限公司 | Unequal-height steel hanging box cofferdam bottom plate structure |
| CN115821954A (en) * | 2022-12-08 | 2023-03-21 | 保利长大工程有限公司 | Steel suspension box and positioning construction method thereof |
| CN115821954B (en) * | 2022-12-08 | 2023-10-20 | 保利长大工程有限公司 | Steel hanging box and positioning construction method thereof |
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| CN107217680B (en) | 2022-05-24 |
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