CN214784071U - Locking steel pipe pile cofferdam - Google Patents
Locking steel pipe pile cofferdam Download PDFInfo
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- CN214784071U CN214784071U CN202120667134.4U CN202120667134U CN214784071U CN 214784071 U CN214784071 U CN 214784071U CN 202120667134 U CN202120667134 U CN 202120667134U CN 214784071 U CN214784071 U CN 214784071U
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Abstract
The utility model relates to a fore shaft steel-pipe pile cofferdam, include: the cofferdam comprises a back cover, a steel pipe pile arranged on the side edge of the back cover in a surrounding mode, and a counterweight module vertically arranged on the back cover and in the cofferdam, wherein a positioning framework clamped with the counterweight module is arranged on the back cover, and the counterweight modules are symmetrically distributed in the cofferdam. The counterweight module is installed and disassembled by adopting hoisting equipment, so that equipment adopted in the construction process of the counterweight of the cofferdam is reduced, the hoisting operation is simpler, the disassembled counterweight module can be recycled, the utilization rate of the counterweight module is improved, the counterweight module can be poured by adopting redundant materials on the construction site, and the manufacturing cost is reduced. After the cofferdam steel-pipe pile is dismantled, because other materials are not filled in the cofferdam steel-pipe pile, the steps of removing the steel-pipe pile are reduced, and the steel-pipe pile can also be circulated, so that the utilization rate of the steel-pipe pile is improved. The counterweight modules are symmetrically distributed, so that the cofferdam back cover is uniformly stressed and is not easy to crack.
Description
Technical Field
The utility model relates to a bridge construction technical field, concretely relates to fore shaft steel-pipe pile cofferdam.
Background
In the construction of wading bridges, cofferdams are often adopted as water enclosing structures for underwater bearing platforms and pier bodies. The currently common cofferdam forms include: the steel sheet pile cofferdam, the steel pipe pile cofferdam and the steel box cofferdam, the overall rigidity of the steel pipe pile cofferdam is between the steel sheet pile cofferdam and the steel box cofferdam, meanwhile, the requirement on construction hoisting equipment is relatively low, the construction process is simple, and the deep water bearing platform and pier body construction is widely used. Because the whole buoyancy of cofferdam is big in the deep water, the total dead weight of fore shaft steel-pipe pile cofferdam steel construction plus back cover concrete is less than the buoyancy that whole cofferdam received, leads to the easy problem that whole come-up appears in the cofferdam. To overcome this problem, it is common to increase the thickness of the closed-end concrete or to inject plain concrete into the steel pipe pile. The thickness of the bottom sealing concrete is increased, the investment of underwater concrete is increased, the thickness of the riverbed surface cleaning is increased, and the construction cost is greatly increased. Plain concrete is injected into the steel pipe pile, the weight of the steel pipe pile is increased, the steel pipe pile is difficult to pull out, lifting equipment and pile vibrating equipment are needed to pull out the steel pipe pile, the concrete in the steel pipe pile is difficult to remove, and the turnover performance of the steel pipe pile cofferdam is reduced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the technical problems, particularly, the thickness of the bottom sealing concrete is increased, so that the surface cleaning thickness of the riverbed is increased; the technical scheme is that plain concrete is injected into the steel pipe pile to cause difficulty in removing the steel pipe pile and reduce the turnover of the steel pipe pile cofferdam, and the following technical scheme is specially provided:
the application embodiment provides a fore shaft steel-pipe pile cofferdam includes: the cofferdam comprises a back cover, a steel pipe pile arranged on the side edge of the back cover in a surrounding mode, and a counterweight module vertically arranged on the back cover and in the cofferdam, wherein a positioning framework clamped with the counterweight module is arranged on the back cover, and the counterweight modules are symmetrically distributed in the cofferdam.
Optionally, the positioning framework is made of channel steel, grooves of the channel steel are arranged oppositely, the counterweight module is a concrete precast block, and the side face of the concrete precast block is clamped in the grooves of the channel steel.
Optionally, one end of the channel steel is embedded in the back cover.
Optionally, an inner support is further included, the weight module being disposed on either side of the inner support.
Optionally, the weight module further comprises a plurality of inner supports, each inner support having one weight module disposed on either side thereof.
Optionally, the largest side of the concrete precast block is parallel to the largest side of the inner support.
Optionally, a plurality of the weight modules are symmetrically distributed in the cofferdam.
Optionally, the cofferdam is square, and counterweight modules with the same weight and quantity are distributed on opposite corners of the cofferdam.
Optionally, the weight module is in the form of a weight.
Optionally, a lifting lug or a lifting ring is arranged at the top of the counterweight module.
Compared with the prior art, the utility model, following beneficial effect has:
according to the fore shaft steel pipe pile cofferdam provided by the embodiment of the application, the counterweight module is installed between the two positioning frameworks by hoisting equipment, the equipment adopted in the construction process of counterweight of the cofferdam is reduced, and the hoisting operation is simpler. After the cofferdam is used, the counterweight module can be detached in a hoisting mode, the detaching method is simple, the detached counterweight module can be recycled, the utilization rate of the counterweight module is improved, the counterweight module can be poured by using redundant materials on a construction site, and the manufacturing cost is reduced. After the cofferdam steel-pipe pile is dismantled, because other materials are not filled in the cofferdam steel-pipe pile, the steps of removing the steel-pipe pile are reduced, and the steel-pipe pile can also be circulated, so that the utilization rate of the steel-pipe pile is improved. The counterweight modules are symmetrically distributed, so that the cofferdam back cover is uniformly stressed and is not easy to crack.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic flow chart of the construction method of the fore shaft steel pipe pile cofferdam of the utility model;
FIG. 2 is a schematic structural view of the fore-and-aft steel pipe pile cofferdam of the present invention;
fig. 3 is the structural schematic diagram of the counterweight module in the fore shaft steel-pipe pile cofferdam of the utility model, which is installed on the back cover concrete.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, but do not preclude the presence or addition of one or more other features, integers, steps, operations, and/or groups thereof.
It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The fore shaft steel-pipe pile cofferdam that this application embodiment provided, as shown in fig. 1, includes: s110, S120, S130, S140.
S110: and pouring back cover concrete at the bottom of the steel pipe pile cofferdam.
S120: and vertically embedding the end part of the positioning framework in the bottom sealing concrete.
S130: and after the bottom sealing concrete is solidified, pumping water in the cofferdam to a preset water head difference.
S140: and installing the counterweight module into the positioning framework through hoisting equipment, and pumping water in the cofferdam to the top surface of the bottom sealing concrete.
Optionally, before installing the counterweight module into the positioning framework by the hoisting device, the method includes:
and (4) pouring a counterweight module by adopting concrete.
In the embodiment provided by the application, as shown in fig. 2 and 3, a cofferdam of a steel pipe pile 2 and a bottom sealing concrete 1 are adopted to form a water enclosing structure. After the steel pipe piles 2 are inserted and driven to form the cofferdam structure, bottom sealing concrete 1 is poured at the bottom of the cofferdam of the steel pipe piles 2 to form the cofferdam structure for enclosing water. After the bottom sealing concrete 1 is poured, one end of a positioning framework 5 is vertically embedded in the bottom sealing concrete 1, and the inserted and driven cofferdam of the steel pipe pile 2 is arranged on the side edge of the bottom sealing concrete 1 in an enclosing mode. The vertical setting of location skeleton 5 is in cofferdam structure, and the one end of location skeleton 5 is pre-buried in back cover concrete 1 for guarantee the stability of location skeleton 5 on back cover concrete 1. After the bottom sealing concrete 1 is solidified, pumping the water of the cofferdam to a preset water head difference, namely, sinking to the buoyancy balance point of the self weight of the cofferdam and the water borne by the cofferdam under the self gravity of the cofferdam. And hoisting the counterweight module 3 into the positioning framework 5, and pumping water in the cofferdam to the top surface of the bottom sealing concrete 1. And a counterweight module is arranged in the cofferdam, so that the cofferdam can not float upwards after water in the cofferdam is pumped out, and the water in the cofferdam is stabilized.
In the embodiment that this application provided, as shown in fig. 2 and fig. 3, location skeleton 5 adopts two channel-section steels that the recess is relative to make, and then makes whole counter weight module 3 can establish between two channel-section steels through the mode card of hoist and mount, and can not take place to empty. Wherein, the longer side of counter weight module 3 is blocked in the recess of channel-section steel. Further, in cofferdam work progress, still be provided with interior support 4, in order to further guarantee counter weight module 3's stability, reduce the shared position of counter weight module 3 simultaneously, support 4 arbitrary side in each and set up a counter weight module 3, counter weight module 3 is prefabricated for the concrete, when the installation, counter weight module 3's the biggest side is parallel with interior support 4, and then can reduce the shared space of counter weight module in the cofferdam, avoid occupying other structure construction required spaces in cofferdam.
In the embodiment that this application provided, the counter weight module adopts lifting device to hoist and mount to installing between two location skeletons, and is corresponding, is provided with rings or the lug that makes things convenient for hoist and mount at the top of counter weight module, has reduced the equipment that adopts in the cofferdam counter weight work progress, and the hoist and mount operation is simpler. After the cofferdam is used, the counterweight module can be detached in a hoisting mode, the detaching method is simple, the detached counterweight module can be recycled, the utilization rate of the counterweight module is improved, the counterweight module can be poured by using redundant materials on a construction site, and the manufacturing cost is reduced. After the cofferdam steel-pipe pile is dismantled, because other materials are not filled in the cofferdam steel-pipe pile, the steps of removing the steel-pipe pile are reduced, and the steel-pipe pile can also be circulated, so that the utilization rate of the steel-pipe pile is improved.
Optionally, before pouring the back cover concrete at the bottom of the steel-pipe pile cofferdam, the method includes:
and determining the preset water head difference of the balance between the self weight of the steel pipe pile cofferdam and the buoyancy according to the self weight of the steel pipe pile cofferdam and the buoyancy borne by the cofferdam.
In the embodiment provided by the application, when cofferdam design is carried out, the balance point of the gravity of the cofferdam and the buoyancy of the cofferdam equal is determined under different stages and different water head differences through anti-floating calculation, namely the preset water head difference of the gravity of the cofferdam and the buoyancy of the cofferdam equal. In the embodiment provided by the application, the cofferdam gravity at least comprises the steel pipe pile cofferdam and the back cover concrete. After the preset water head difference is determined, the counterweight module is convenient to install, namely after the bottom sealing concrete is solidified, the cofferdam is pumped to a position corresponding to the position of the bottom sealing concrete, so that the water head difference of the cofferdam is equal to the preset water head difference, and then the counterweight module is hoisted into the positioning framework in a hoisting mode, and the installation of the cofferdam anti-floating structure is realized.
Optionally, before pouring the back cover concrete at the bottom of the steel-pipe pile cofferdam, the method further includes:
when no water exists in the cofferdam, determining the difference value between the self weight and the buoyancy of the cofferdam;
and determining the total weight of the counterweight module of the steel pipe pile cofferdam according to the difference.
In the embodiment provided by the application, before cofferdam construction is carried out, in the design process of the cofferdam, according to the known size and material of the steel pipe pile and the structural size of the bottom-sealing concrete, the gravity of the cofferdam can be determined, and when the cofferdam is empty of water, the buoyancy of the cofferdam at the installation position can be determined, and further the counterweight which needs to be added in the cofferdam can be determined according to the buoyancy of the cofferdam and the dead weight of the cofferdam. The total weight of the counterweight module is equivalently determined, so that after the cofferdam is installed, the condition of floating cannot occur at the installation position when water in the cofferdam is pumped to the top surface of the bottom sealing concrete by adding the counterweight module, and the stability of the cofferdam in water is ensured. Illustratively, when the self weight of the cofferdam is M, and the buoyancy force applied to the cofferdam at the installation position is F, the gravity G of the counterweight module can be obtained by F-M, and then the weight M of the counterweight module is obtained by G/G, wherein the weight is the total weight of all counterweight modules in the cofferdam. In order to ensure the overall anti-floating stability of the cofferdam, the number and the installation position of the counterweight modules are required to be determined.
Optionally, determining the total weight and size of the counterweight module of the steel pipe pile cofferdam according to the difference, including:
determining the number of the counterweight modules in the cofferdam and the sub-total amount of each counterweight module according to the total weight;
the size of each weight module is determined based on the number and fractional amount of the weight modules.
When cofferdam installation aquatic, in order to guarantee the stability of cofferdam, the gravity that needs the weight protection counter weight module to apply for the cofferdam is comparatively balanced at back cover concrete top surface, avoids one side atress too big, and one side atress undersize prevents that the local region counter weight of cofferdam is not enough and the come-up. Thus, after determining the total weight of the weight modules, it is also necessary to determine the fractional amount and placement position of each weight module within the cofferdam. Specifically, based on the number of weight modules to be set, the total weight of the weight modules is divided by the number, so that the total amount of the weight modules is obtained, and then the size of each weight module is determined according to the total amount of the weight modules. The size of each counterweight module is determined according to the spatial position of the counterweight module in the cofferdam, so that each counterweight module can be installed in a sufficient space, and meanwhile, the counterweight module is required to be ensured to have certain thickness, so that the counterweight module is not easy to crack due to collision in the cofferdam construction process. Preferably, the thickness of the weight module is consistent with the width of the channel steel so that the weight module can be installed into the positioning framework.
Optionally, after determining the size of each weight module according to the number and the sub-total amount of the weight modules, the method includes:
and determining the arrangement position of each counterweight module in the cofferdam.
Optionally, after determining the number of the weight modules in the cofferdam and the total amount of the weight modules in the cofferdam according to the total weight, the method includes:
and arranging counterweight modules with the same weight at symmetrical positions in the cofferdam.
Optionally, counterweight modules with the same weight are symmetrically arranged in the cofferdam, and the counterweight modules comprise:
when the cofferdam is rectangular, the counterweight modules with the same weight are symmetrically arranged on the opposite corners of the cofferdam.
When the setting position of the counterweight module is determined, the relative position weight of the counterweight module in the cofferdam needs to be ensured to be equal, so that the situation that the inside of the cofferdam cannot be stressed in a balanced manner is ensured, the local floating is not easy to occur, and the condition that the plugging concrete cracks is avoided. Therefore, the same weight and number of counterweight modules are arranged in corresponding positions in the cofferdam, wherein each counterweight module is equal. When the number of the counterweight modules is not equal, the weights of the counterweight modules at the opposite positions are equal. As shown in fig. 2, when the cofferdam of the steel pipe pile 1 is rectangular, the inner supports 4 are arranged on opposite corners of the cofferdam, the counterweight modules 3 with the same weight are arranged at symmetrical positions on the opposite corners of the cofferdam, namely opposite vertex angles, the counterweight modules with the same weight are arranged, and one counterweight module is arranged on any side of each inner support, so as to ensure that the gravity borne by the symmetrical positions of the cofferdam is the same, and meanwhile, a new space is divided inside the cofferdam for installing the counterweight modules.
Preferably, the counterweight module of this application still includes standard module and adjusting module, and the size and the weight of standard module are all unanimous, and adjusting module's weight ratio standard module is littleer, and the size can be unanimous with standard module or not can be inconsistent, and in order to improve the construction convenience, the thickness of standard module and adjusting module is unanimous. The total weight of the cofferdam can be counterbalanced with the buoyancy by the adjusting module. Preferably, the counter weight module can also be the weight form, and then be convenient for counter weight to the cofferdam for the cofferdam counter weight is more accurate, and then the cofferdam total weight can just counterbalance with buoyancy (like the gravity and the buoyancy of cofferdam total weight are equal), makes the structure that the cofferdam construction obtained coincide with the design, and the structure atress is stable. Through the mode, the bearing weight of the position where the counterweight module is arranged in the cofferdam can not be overlarge, and further the cracking of the bottom sealing concrete is avoided.
Optionally, after determining the setting position of each weight module in the cofferdam, the method includes:
and determining the pre-buried position of the positioning framework in the bottom sealing concrete according to the setting position.
Optionally, the tip of vertical pre-buried location skeleton in the back cover concrete includes:
and embedding the end part of the positioning framework at the embedded position in the bottom sealing concrete.
After each counter weight module set up to confirm, as shown in fig. 3, when pouring back cover concrete 1, at the vertical pre-buried two channel-section steels in corresponding counter weight module 3 both sides, form location skeleton 5, the channel-section steel recess sets up relatively, the position that the channel-section steel set up makes the channel-section steel recess end laminate mutually with counter weight module 3 side, perhaps counter weight module 3 side is less than 1/2 recessed degree of depth with the distance at the bottom of the recess, so that counter weight module can block stably in location skeleton 5, and the hoist and mount in-process of being convenient for can not blocked. Each counterweight module is provided with a certain framework 5, and each framework 5 consists of two channel steels with opposite grooves. The tip of location skeleton 5 is pre-buried in the back cover concrete for location skeleton 5 has bigger area of contact with the side of counter weight module 3, guarantees the stability of counter weight module in the work progress.
In conclusion, the fore shaft steel-pipe pile cofferdam that this application provided includes following beneficial effect:
according to the fore shaft steel pipe pile cofferdam provided by the embodiment of the application, the counterweight module is installed between the two positioning frameworks by hoisting equipment, the equipment adopted in the construction process of counterweight of the cofferdam is reduced, and the hoisting operation is simpler. After the cofferdam is used, the counterweight module can be detached in a hoisting mode, the detaching method is simple, the detached counterweight module can be recycled, the utilization rate of the counterweight module is improved, the counterweight module can be poured by using redundant materials on a construction site, and the manufacturing cost is reduced. After the cofferdam steel-pipe pile is dismantled, because other materials are not filled in the cofferdam steel-pipe pile, the steps of removing the steel-pipe pile are reduced, and the steel-pipe pile can also be circulated, so that the utilization rate of the steel-pipe pile is improved. The counterweight modules are symmetrically distributed, so that the cofferdam back cover is uniformly stressed and is not easy to crack.
The above are only some embodiments of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The utility model provides a fore shaft steel-pipe pile cofferdam which characterized in that includes: the cofferdam comprises a back cover, a steel pipe pile arranged on the side edge of the back cover in a surrounding mode, and a plurality of counterweight modules vertically arranged on the back cover and in the cofferdam, wherein a positioning framework clamped with the counterweight modules is arranged on the back cover, and the counterweight modules are symmetrically distributed in the cofferdam.
2. The fore shaft steel pipe pile cofferdam of claim 1, wherein the positioning framework is made of channel steel, grooves of the channel steel are oppositely arranged, the counterweight module is a concrete precast block, and the side surface of the concrete precast block is clamped in the groove of the channel steel.
3. The fore shaft steel pipe pile cofferdam of claim 2, wherein one end of the channel steel is pre-buried in the back cover.
4. The fore shaft steel pipe pile cofferdam of claim 2, further comprising an inner support, wherein the counterweight module is disposed on either side of the inner support.
5. The fore shaft steel pipe pile cofferdam of claim 4, further comprising a plurality of said inner supports, each of said inner supports having one said counterweight module disposed on either side thereof.
6. The fore shaft steel pipe pile cofferdam of claim 4, wherein the largest side of the concrete precast block is parallel to the largest side of the inner support.
7. The fore shaft steel pipe pile cofferdam of claim 6, wherein the cofferdam is square, and counterweight modules with the same weight and quantity are distributed on opposite corners of the cofferdam.
8. The fore shaft steel pipe pile cofferdam of claim 1, wherein the weight module is in the form of a weight.
9. The fore shaft steel pipe pile cofferdam of claim 1, wherein a lifting lug or a lifting ring is arranged on the top of the counterweight module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120667134.4U CN214784071U (en) | 2021-03-31 | 2021-03-31 | Locking steel pipe pile cofferdam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120667134.4U CN214784071U (en) | 2021-03-31 | 2021-03-31 | Locking steel pipe pile cofferdam |
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| CN214784071U true CN214784071U (en) | 2021-11-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113186958A (en) * | 2021-03-31 | 2021-07-30 | 中交路桥华南工程有限公司 | Locking steel pipe pile cofferdam |
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2021
- 2021-03-31 CN CN202120667134.4U patent/CN214784071U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113186958A (en) * | 2021-03-31 | 2021-07-30 | 中交路桥华南工程有限公司 | Locking steel pipe pile cofferdam |
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