CN110565673A - reinforced concrete bottom sealing structure of bearing platform in flood beach area and construction method thereof - Google Patents
reinforced concrete bottom sealing structure of bearing platform in flood beach area and construction method thereof Download PDFInfo
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- CN110565673A CN110565673A CN201910707559.0A CN201910707559A CN110565673A CN 110565673 A CN110565673 A CN 110565673A CN 201910707559 A CN201910707559 A CN 201910707559A CN 110565673 A CN110565673 A CN 110565673A
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- 238000007789 sealing Methods 0.000 title claims abstract description 79
- 238000010276 construction Methods 0.000 title claims abstract description 51
- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 29
- 239000004567 concrete Substances 0.000 claims abstract description 100
- 238000004140 cleaning Methods 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 111
- 239000010959 steel Substances 0.000 claims description 111
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000000758 substrate Substances 0.000 claims description 15
- 239000004575 stone Substances 0.000 claims description 14
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 10
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 3
- 241000446313 Lamella Species 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 9
- 239000010802 sludge Substances 0.000 description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013468 resource allocation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Foundations (AREA)
Abstract
the invention provides a reinforced concrete bottom sealing structure of a bearing platform in a flood plain area and a construction method thereof. Compared with the traditional plain concrete, the method can greatly reduce the thickness of the bottom sealing concrete, thereby reducing the volume of the bottom sealing concrete and the volume of the foundation cleaning.
Description
Technical Field
The invention relates to the field of bridge bearing platform construction, in particular to a reinforced concrete bottom sealing structure of a bearing platform in a flood plain area and a construction method thereof.
background
The traditional plain concrete back cover mainly resists the water pressure formed by the difference of the water heads inside and outside the steel cofferdam by the self weight of the concrete and the bond stress between the concrete and the steel cofferdam and the steel pile casing. The cofferdam is made to form a closed environment inside, so that water is prevented from permeating into the cofferdam from the bottom of the cofferdam, and a construction platform is provided for the construction of the bearing platform.
The traditional plain bottom-sealing concrete has the following defects:
1. the process is complicated, the construction difficulty is high, and the construction period is long;
2. The water head difference (the internal and external water pressure is unbalanced) exists inside and outside the steel cofferdam, the deformation and even collapse accidents of the cofferdam are easy to happen, and the safety coefficient is low;
3, complicated working procedures and working conditions increase the labor and material investment for calculating the stress of the steel cofferdam and observing the cofferdam;
4. The thickness that plain back cover concrete of tradition set up is often great, and consequently clear base square sum back cover concrete square sum in the cofferdam is also great, greatly increased constructor input, construction cost is high.
disclosure of Invention
the invention aims to provide a reinforced concrete bottom sealing structure of a bearing platform in a flood plain area and a construction method thereof aiming at the defects of the construction method.
therefore, the technical scheme adopted by the invention is as follows:
the mud flat district cushion cap reinforced concrete back cover structure includes:
a steel sheet pile cofferdam;
the bridge pile foundations are arranged at the bottom of the steel sheet pile cofferdam at intervals;
the inner support is arranged at the upper part of the steel sheet pile cofferdam in an upper and lower layer, and the end part of the inner support is fixed on the inner wall of the steel sheet pile cofferdam;
The stone sheets are laid on the steel sheet pile cofferdam base;
The bottom sealing concrete is arranged on the top surface of the flat stone;
And the bearing platform is arranged on the top surface of the bottom sealing concrete.
furthermore, the water in the bottom sealing concrete is tiled with bottom sealing concrete steel bars.
Preferably, the bottom-sealed concrete reinforcing steel bars are welded with the steel casing.
further, the inner support is composed of a plurality of steel pipes which are arranged in parallel or in a crossed mode.
furthermore, the two ends of the inner support are fixed on the inner wall of the steel sheet pile cofferdam through section steel and are reinforced through triangular stiffening plates.
Further, this back cover structure still includes the escape canal, the escape canal is located between inboard and the back cover concrete of steel sheet pile cofferdam.
The construction method of the reinforced concrete bottom sealing structure of the bearing platform in the flood beach area comprises the following steps:
s1, clearing the foundation in the steel sheet pile cofferdam, and excavating the sludge in the steel sheet pile cofferdam;
s2, after the foundation cleaning of the steel sheet pile cofferdam is finished, performing substrate treatment to enable the steel sheet pile cofferdam substrate to have certain bearing capacity;
S3, laying a sealing concrete steel bar after the substrate treatment is finished;
s4, pouring bottom sealing concrete upstream along the downstream, and vibrating while pouring;
and S5, removing pile heads of the bridge pile foundation with equal strength of the bottom sealing concrete, and then, starting to carry out bearing platform construction.
Further, in the step S1, the long-arm excavator and the manual work are adopted for cleaning the foundation in the steel sheet pile cofferdam.
Further, the steel sheet pile cofferdam foundation treatment in step S2 is performed by throwing and filling rubbles, and after the foundation treatment is completed, the bearing capacity of the foundation treatment needs to meet the load of the bottom sealing concrete reinforcement construction.
further, the construction method of the reinforced concrete bottom sealing structure of the bearing platform in the flood plain area comprises the following steps:
s1, after the construction of the bridge pile foundation is completed, constructing a steel sheet pile cofferdam;
S2, pumping water in the steel sheet pile cofferdam and installing an inner support;
after the inner support is installed in the S3, the steel sheet pile cofferdam base is processed by using the flakelets, so that the steel sheet pile cofferdam base has certain bearing capacity;
s4, laying bottom-sealed concrete steel bars on the top surface of the flaky stone in the step S3, and welding the bottom-sealed concrete steel bars and the steel casing;
s5, pouring bottom sealing concrete upstream along the downstream, and vibrating while pouring;
and S6, removing pile heads of the bridge pile foundation by using the sealing bottom concrete with equal strength, and then starting to carry out bearing platform construction.
The invention has the following beneficial effects:
1. the operation is simple: the reinforced concrete back cover changes the back cover concrete from the underwater concrete into the conventional concrete, thereby reducing the construction difficulty.
2. the construction quality is controllable: the bottom sealing concrete adopts a conventional concrete pouring process, the whole process from reinforcing steel bar installation to concrete pouring is visual and controllable, and compared with the underwater concrete bottom sealing, the bottom sealing concrete can visually reflect the construction quality of the reinforcing steel bars and the concrete pouring quality.
3. The economic efficiency is as follows: the thickness of the bottom sealing concrete is reduced after the reinforcing steel bars are added, the foundation clearing amount of the foundation is reduced, and the thickness of the bottom sealing concrete is also reduced; meanwhile, a long-arm digging machine and a manual-matching foundation cleaning mode are adopted, and a high-pressure water gun is matched with a slurry pump to clean the foundation compared with water storage, so that reasonable resource allocation is realized, resource investment is reduced, the construction period is shortened, and the construction progress is accelerated.
4. the application range is wide: the method for performing the steel cofferdam bottom sealing by adopting the reinforced concrete has the characteristics of simplicity in operation, controllable quality, high safety, remarkable economic benefit and the like, is suitable for the steel cofferdam bottom sealing construction at the shoal, and is worthy of large-scale popularization.
drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a general elevation view of a reinforced concrete back cover of a cushion cap in a flood plain;
Fig. 2 is a layout diagram of local reinforcing steel bars of reinforced concrete back cover of a cushion cap in a flood plain area.
in the figure: 1. a bridge pile foundation; 2. a steel sheet pile cofferdam; 3. supporting in a cofferdam; 4. a stone slab; 5. sealing bottom concrete; 6. a bearing platform; 7. sealing the bottom concrete steel bar; 8. pile foundation steel casing.
Detailed Description
the following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
in the present invention, the upper, lower, left and right in the drawings are regarded as the upper, lower, left and right of the assembled stiff skeleton described in the present specification.
the exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, 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. Further, it will be 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 relevant art and will not be interpreted in an idealized or overly formal sense.
The technical solution in the implementation of the present invention will be clearly and completely described below.
implementation mode one
The foundation pit bottom sealing structure of the cushion cap steel cofferdam in the flood plain area, as shown in fig. 1 and 2, comprises:
A steel sheet pile cofferdam 2;
the bridge pile foundations 1 are arranged in a plurality of numbers, and the bridge pile foundations 1 are arranged at the bottom of the steel sheet pile cofferdam 2 at intervals;
The inner support 3 is divided into an upper layer and a lower layer which are arranged at the upper part of the steel sheet pile cofferdam 2, and the end part of the inner support 3 is fixed on the inner wall of the steel sheet pile cofferdam 2;
The stone 4 is laid on the base of the steel sheet pile cofferdam 2;
the bottom sealing concrete 5 is arranged on the top surface of the sheet stone 4;
and the bearing platform 6 is arranged on the top surface of the bottom sealing concrete 5.
the embodiment further provides a construction method of the reinforced concrete bottom sealing structure of the bearing platform in the flood plain area, which comprises the following steps:
S1, clearing the foundation in the steel sheet pile cofferdam 2, and excavating sludge in the steel sheet pile cofferdam 2;
s2, after the foundation cleaning of the steel sheet pile cofferdam 2 is finished, performing substrate treatment to enable the substrate of the steel sheet pile cofferdam 2 to have certain bearing capacity;
S3, after the substrate treatment is finished, laying the bottom sealing concrete steel bars 7;
S4, pouring the bottom sealing concrete 5 upstream along the downstream, and vibrating while pouring;
And S5, removing pile heads of the bridge pile foundation 1 with equal strength of the bottom sealing concrete 5, and then starting to construct the bearing platform 6.
The main stress system in the construction process of the bearing platform back cover and the bearing platform is vertical force balance, an underwater concrete back cover form is adopted in the conventional wading bearing platform construction, the water pressure before the concrete is poured and the gravity after the concrete is poured are balanced by utilizing the bond stress between the back cover concrete and the steel casing, a water head difference (unbalanced internal and external water pressure) exists inside and outside the steel cofferdam, the deformation and even collapse accidents of the cofferdam are easy to happen, and the safety coefficient is low; and the thickness that plain back cover concrete set up of tradition is often great, therefore clear base square volume in the cofferdam and back cover concrete square volume also are great, greatly increased constructor input, construction cost is high. In order to overcome the problem, the invention provides a reinforced concrete back cover construction method suitable for bridge bearing platform construction in an overband area. The foundation cleaning of the bearing platform and the bottom sealing concrete construction are in a waterless operation environment. Compared with the traditional plain concrete, the thickness of the back cover concrete can be greatly reduced, so that the volume of the back cover concrete and the volume of the clean foundation are reduced.
second embodiment
the second embodiment of the present invention relates to a foundation pit bottom sealing structure of a steel cofferdam for a cushion cap in a flood plain area, as shown in fig. 1 and 2, including: the steel sheet pile cofferdam comprises a steel sheet pile cofferdam 2, an inner support 3, a stone slab 4, bottom sealing concrete 5 and a bearing platform 6; a plurality of bridge pile foundations 1 are arranged at the bottom of the steel sheet pile cofferdam 2 at intervals; an inner support 3 is arranged at the upper part of the steel sheet pile cofferdam 2, the inner support 3 is arranged at the upper layer and the lower layer, and the end part of the inner support 3 is fixed on the inner wall of the steel sheet pile cofferdam 2; the sheet stones 4 are laid on the base of the steel sheet pile cofferdam 2; the bottom sealing concrete 5 is arranged on the top surface of the sheet stone 4; the bearing platform 6 is arranged on the top surface of the bottom sealing concrete 5. The bearing platform adopts reinforced concrete back cover can reduce the steel sheet pile cofferdam and beat and establish the degree of depth, reduces the steel sheet pile and beats and establish the degree of difficulty.
Further, the steel protects a section of thick bamboo 8 as the auxiliary measure in 1 work progress of bridge pile foundation, and isolated protects a section of thick bamboo outside soil body, guarantees pile foundation reinforced concrete structure quality.
Further, the inner support 3 is composed of a plurality of steel pipes which are arranged in parallel or in a crossed mode. Furthermore, two ends of the inner support 3 are fixed on the inner wall of the steel sheet pile cofferdam 2 through section steel and are reinforced through triangular stiffening plates.
further, this back cover structure still includes escape canal 9, escape canal 9 is located between steel sheet pile cofferdam 2 inboard and back cover concrete 5.
furthermore, the bottom sealing concrete 5 is provided with bottom sealing concrete reinforcing steel bars 7 in a water flat laying manner, tensile property of the reinforcing steel bars is utilized to resist water buoyancy and tensile force caused by bearing platform construction load, and bearing capacity of the bottom sealing concrete is enhanced, so that thickness of the bottom sealing concrete can be reduced, and engineering quantity of the bottom sealing concrete is saved.
third embodiment
The third embodiment of the invention relates to a construction method of a reinforced concrete bottom sealing structure of a bearing platform in a flood plain area, which comprises the following steps:
S1, clearing the foundation in the steel sheet pile cofferdam 2, and excavating the sludge in the steel sheet pile cofferdam 2, further, clearing the foundation in the steel sheet pile cofferdam 2 by adopting a long-arm excavator and manual cooperation mode, and cleaning the sludge to be below the bottom elevation of the bottom sealing concrete;
s2, after the foundation cleaning of the steel sheet pile cofferdam 2 is finished, performing substrate treatment to enable the substrate of the steel sheet pile cofferdam 2 to have certain bearing capacity; because the bearing platform is positioned in the flood beach area, the difference of water heads at the inner side and the outer side of the steel cofferdam is smaller, even the local water level is below the ground, and the stratum where the bottom sealing concrete is positioned is a watertight layer, therefore, the bottom sealing concrete mainly bears the load in the construction process of the bearing platform and the self weight of the concrete of the bearing platform, during the construction, the bearing capacity of the base is enhanced by adopting a mode of throwing and filling the rubble 4, and after the base is treated, the bearing capacity of the base needs to meet the load when the steel bar 7 of the bottom sealing concrete is constructed (the bearing capacity of the base is not less than 100KPa, namely the standard that no obvious sinking of an adult standing on;
S3, after the substrate is processed, arranging the bottom sealing concrete steel bars 7, and enhancing the tensile capacity of the bottom sealing concrete by using the steel bars, thereby enhancing the bearing capacity of the bottom sealing concrete; furthermore, the bottom sealing concrete steel bars are welded with the pile foundation steel casing, so that the pile foundation steel casing and the bottom sealing concrete can form an effective bearing whole;
S4, pouring the bottom sealing concrete 5 upstream along the downstream, wherein the thickness of the bottom sealing concrete is reduced after the reinforcing steel bars are added, so that the pouring is carried out by pushing the whole section, and the pouring is finished at one time and is vibrated to be compact; meanwhile, in order to ensure uniform concrete pouring, the concrete is poured in a multi-point distribution mode of a pump truck, and the performance of the bottom sealing concrete is required to meet the slump of 160-200 mm;
and S5, removing pile heads of the bridge pile foundation 1 with equal strength of the bottom sealing concrete 5, and then starting to construct the bearing platform 6.
During construction, the foundation cleaning depth is small, the long-arm digging machine is used for cleaning the foundation, and the pile casing and the cofferdam periphery are manually matched to clean sludge. And after the foundation is cleaned, the rubbles are thrown and filled, then the reinforcing steel bars are laid, and the bottom sealing concrete is poured, wherein the whole process takes 5 days. Compared with water storage, a high-pressure water gun is adopted to cooperate with a mud pump to clean the foundation and seal the bottom, the foundation cleaning amount is saved by about 20 days, the foundation cleaning amount is reduced by about 1000 sides, the bottom sealing concrete is saved by about 1000 sides, the direct economic investment is reduced by about 35 ten thousand yuan, the precious time is won for the construction of the bearing platform, and the construction of the bearing platform in flood season is avoided.
Embodiment IV
the fourth embodiment of the invention relates to a construction method of a reinforced concrete bottom sealing structure of a bearing platform in a flood plain area, which comprises the following steps:
S1, firstly, constructing the steel casing 8, then drilling the bridge pile foundation 1, and putting down the reinforcement cage to pour concrete, so as to complete the construction of the bridge pile foundation 1; after the construction of the bridge pile foundation 1 is finished, a steel sheet pile cofferdam 2 is arranged;
s2, pumping water in the steel sheet pile cofferdam 2 and installing the inner support 3;
after the support 3 is installed in the S3, the steel sheet pile cofferdam 2 substrate is processed by the lamellas 4, so that the steel sheet pile cofferdam 2 substrate has a certain bearing capacity;
S4, laying bottom-sealed concrete steel bars 7 on the top surface of the flaky stone 4 in the step S3, and welding the bottom-sealed concrete steel bars 7 and the steel casing 8;
S5, pouring the bottom sealing concrete 5 upstream along the downstream, and vibrating while pouring;
And S6, removing the pile head of the bridge pile foundation 1 by using the bottom sealing concrete 5 with equal strength, and then starting to construct the bearing platform 6.
According to the invention, the reinforced concrete is adopted for carrying out the bottom sealing of the steel cofferdam in the flood beach area, the tensile property of the steel bars is fully utilized, the tensile capacity of the concrete is increased, the thickness of the bottom sealing concrete can be reduced, the amount of the foundation clearing of the cofferdam is reduced, the construction period is shortened, and the construction period is saved.
Parts of the above embodiments that are not specifically described are well known components and conventional structures or conventional means in the art and will not be described in detail herein.
While embodiments of the invention have been shown and described; those of ordinary skill in the art will understand that: numerous changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention; the scope of the invention is defined by the claims and their equivalents.
Claims (10)
1. the mud flat district cushion cap reinforced concrete back cover structure, its characterized in that includes:
a steel sheet pile cofferdam (2);
The bridge pile foundations (1) are arranged in a plurality of numbers, and the bridge pile foundations (1) are arranged at the bottom of the steel sheet pile cofferdam (2) at intervals;
the inner support (3) is divided into an upper layer and a lower layer which are arranged at the upper part of the steel sheet pile cofferdam (2), and the end part of the inner support (3) is fixed on the inner wall of the steel sheet pile cofferdam (2);
the stone sheets (4) are laid on the base of the steel sheet pile cofferdam (2);
the back cover concrete (5), the back cover concrete (5) is arranged on the top surface of the flat stone (4);
and the bearing platform (6) is arranged on the top surface of the bottom sealing concrete (5).
2. The flood plain area cushion cap reinforced concrete substructure of claim 1, wherein: and the bottom sealing concrete (5) is horizontally paved with bottom sealing concrete reinforcing steel bars (7).
3. The flood plain area cushion cap reinforced concrete substructure of claim 2, wherein: the bottom sealing concrete steel bars (7) are connected with the steel casing (8) in a welding mode.
4. the flood plain area cushion cap reinforced concrete substructure of claim 1, wherein: the inner support (3) is composed of a plurality of steel pipes which are arranged in parallel or in a crossed mode.
5. the flood plain area cushion cap reinforced concrete substructure of claim 1, wherein: and the two ends of the inner support (3) are fixed on the inner wall of the steel sheet pile cofferdam (2) through section steel and are reinforced through triangular stiffening plates.
6. The flood plain area cushion cap reinforced concrete substructure of claim 1, wherein: the structure further comprises a drainage ditch (9), wherein the drainage ditch (9) is arranged between the inner side of the steel sheet pile cofferdam (2) and the bottom sealing concrete (5).
7. The construction method of the reinforced concrete bottom sealing structure of the bearing platform in the flood beach area is characterized by comprising the following steps:
s1, clearing the foundation in the steel sheet pile cofferdam (2), and excavating silt in the steel sheet pile cofferdam (2);
S2, after the foundation cleaning of the steel sheet pile cofferdam (2) is finished, performing substrate treatment to enable the substrate of the steel sheet pile cofferdam (2) to have certain bearing capacity;
s3 laying a bottom sealing concrete steel bar (7) after the substrate treatment is finished;
s4 pouring the bottom sealing concrete (5) along the downstream and upstream, and vibrating while pouring;
S5 the pile head of the bridge pile foundation (1) is chiseled off with equal strength of the bottom sealing concrete (5), and then the construction of the bearing platform (6) can be started.
8. The construction method of the reinforced concrete substructure of the flood beach area of claim 7, wherein: and in the step S1, the foundation cleaning in the steel sheet pile cofferdam (2) adopts a long-arm digging machine and manual matching mode.
9. The construction method of the reinforced concrete substructure of the flood beach area of claim 7, wherein: in the step S2, the steel sheet pile cofferdam (2) is processed by throwing and filling the rubble stones (4), and after the processing of the substrate is finished, the bearing capacity of the steel sheet pile cofferdam needs to meet the load of the bottom-sealing concrete steel bars (7) during construction.
10. The construction method of the reinforced concrete substructure of the flood beach area of claim 7, comprising the steps of:
s1, after the construction of the bridge pile foundation (1) is completed, driving a steel sheet pile cofferdam (2);
S2, pumping water in the steel sheet pile cofferdam (2) and installing an inner support (3);
after the inner support (3) is installed in the S3, the base of the steel plate pile cofferdam (2) is processed by the lamellas (4), so that the base of the steel plate pile cofferdam (2) has a certain bearing capacity;
s4, laying bottom-sealed concrete steel bars (7) on the top surface of the flaky stone (4) in the step S3, and connecting the bottom-sealed concrete steel bars (7) with the steel casing (8) in a welding mode;
s5 pouring the bottom sealing concrete (5) along the downstream and upstream, and vibrating while pouring;
and S6, the bottom sealing concrete (5) has equal strength, the pile head of the bridge pile foundation (1) is chiseled off, and then the construction of the bearing platform (6) can be started.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910707559.0A CN110565673A (en) | 2019-08-01 | 2019-08-01 | reinforced concrete bottom sealing structure of bearing platform in flood beach area and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910707559.0A CN110565673A (en) | 2019-08-01 | 2019-08-01 | reinforced concrete bottom sealing structure of bearing platform in flood beach area and construction method thereof |
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| Publication Number | Publication Date |
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| CN110565673A true CN110565673A (en) | 2019-12-13 |
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| CN201910707559.0A Pending CN110565673A (en) | 2019-08-01 | 2019-08-01 | reinforced concrete bottom sealing structure of bearing platform in flood beach area and construction method thereof |
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| CN103397648A (en) * | 2013-08-12 | 2013-11-20 | 中铁二局股份有限公司 | Cofferdam reinforced concrete secondary bottom-sealing construction method of steel pouring jacket with bottom |
| CN105544575A (en) * | 2015-12-17 | 2016-05-04 | 中交二航局第四工程有限公司 | Underwater bottom sealing concrete construction method using steel truss for reinforcement |
| CN205875194U (en) * | 2016-07-01 | 2017-01-11 | 中铁大桥勘测设计院集团有限公司 | Pouring jacket cofferdam bearing platform structure |
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| CN106958254A (en) * | 2017-05-08 | 2017-07-18 | 中铁七局集团第四工程有限公司 | Latch steel pipe and reinforced concrete combination pile cofferdam and its construction method |
| CN210766842U (en) * | 2019-08-01 | 2020-06-16 | 中交二公局第二工程有限公司 | Reinforced concrete bottom sealing structure for bearing platform of flood plain area |
-
2019
- 2019-08-01 CN CN201910707559.0A patent/CN110565673A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103397648A (en) * | 2013-08-12 | 2013-11-20 | 中铁二局股份有限公司 | Cofferdam reinforced concrete secondary bottom-sealing construction method of steel pouring jacket with bottom |
| CN105544575A (en) * | 2015-12-17 | 2016-05-04 | 中交二航局第四工程有限公司 | Underwater bottom sealing concrete construction method using steel truss for reinforcement |
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| Title |
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