CN113863355B - Waterproof construction method for large-volume bearing platform in water - Google Patents
Waterproof construction method for large-volume bearing platform in water Download PDFInfo
- Publication number
- CN113863355B CN113863355B CN202111208108.6A CN202111208108A CN113863355B CN 113863355 B CN113863355 B CN 113863355B CN 202111208108 A CN202111208108 A CN 202111208108A CN 113863355 B CN113863355 B CN 113863355B
- Authority
- CN
- China
- Prior art keywords
- steel
- layer
- template
- bearing platform
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Foundations (AREA)
Abstract
The invention relates to the field of infrastructure, in particular to a waterproof construction method for a large-volume bearing platform in water. The method comprises the steps of measurement and paying-off, foundation pit excavation, substrate treatment, steel formwork processing, first-layer steel formwork installation, second-layer steel formwork installation, formwork dismantling and the like, wherein the steel formwork has reliable integrity and good waterproofness, is favorable for being assembled in blocks for repeated use, and can be used as a foundation or cushion cap construction formwork while being waterproof; as a temporary maintenance structure, the steel form can be used in a turnover way, and the engineering cost is low.
Description
Technical Field
The invention relates to the field of infrastructure, in particular to a waterproof construction method for a large-volume bearing platform in water.
Background
Building a cofferdam, utilizing the cofferdam to prevent water, and pumping water in the cofferdam to form a waterless operation surface.
The disadvantages are as follows: the filled earth-rock cofferdam or the built steel sheet pile is suitable for deep water, and some 'big and small materials' are used in shallow water environment. In a construction area, the foundation of a bearing platform is bare bedrock, and a steel sheet pile is difficult to erect; the inside clay core wall that sets up of earth rock cofferdam or adopt the slip casting curtain, easy seepage causes extravagantly, waterproof failure.
Some bridge engineering construction areas are often located at the coast or the edge of a river bank, are influenced by water level, and are restricted by the traditional construction mode. In low tide level or dry season, the bottom sealing embedded steel template is adopted to create a good construction platform and a protection structure for bearing platform construction, and the method is a practical method.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a waterproof construction method for a large-volume bearing platform in water. The method is a construction method of a large-volume bearing platform in water, which is located in a water area environment and has a water level elevation lower than the bottom elevation of the bearing platform in a low tide level or a dry period.
In order to achieve the purpose, the invention adopts the following technical scheme: a waterproof construction method for a large-volume bearing platform in water comprises the following steps:
(1) And (3) measurement and paying-off:
measuring and releasing a bearing platform side line and a foundation pit excavation side line in a low tide level or dry water period;
(2) Excavation of a foundation pit:
excavating a foundation pit according to the excavation sideline, and enabling the excavation elevation to be 70cm below the elevation of the bottom of the bearing platform;
(3) Substrate treatment:
in a low tide level or low water period, cleaning mud at the bottom of a foundation pit by using a mud pump, laying a layer of impermeable geotextile, then pouring a C20 concrete cushion layer with the thickness of 20cm, wherein the sizes of the impermeable geotextile and the cushion layer exceed the size of a bearing platform by 1m, and providing a working surface for the subsequent installation of a first layer of steel formwork;
(4) Processing a steel template:
processing into an upper section steel template and a lower section steel template according to the height of the bearing platform; the lower section of steel template is expected to be embedded with concrete 50cm and exposed for 1m, the upper section of steel template is the height of the residual bearing platform, and the thickness of the steel template panel is at least 6mm; when the steel template is processed, the steel plate seam is fully welded, so that water leakage is avoided. The steel templates are pre-assembled in a processing factory, so that the tight splicing of the templates is ensured;
(5) Installing a first layer of steel templates:
in order to ensure accurate positioning of the embedded steel templates, 16# I-beams are welded and fixed on two adjacent pile foundation steel casing, C28 steel bars are welded on the I-beams at equal intervals to serve as positioning piles, and the lengths of the steel bars are obtained by measuring coordinates; after the positioning pile is welded, hoisting a first section of steel template at a low tide level or in a dry season, and positioning each section of steel template by means of double control of a measuring sideline and the positioning pile;
customizing a water-swelling rubber strip according to the thickness of the template, erecting bolt holes on the rubber strip according to the bolt hole intervals, sticking the water-swelling rubber strip between every two adjacent template joints, and then screwing the bolts to fix the template; after the first layer of templates are completely assembled at the design position, pouring 50 cm-thick bottom sealing concrete, and embedding the first layer of templates into the concrete;
(6) Second layer steel form installation
The top surface of the first layer of steel formwork is provided with a water-swelling rubber strip, then the second layer of steel formwork is installed, after the second layer of steel formwork is installed, the 10# I-steel is used for supporting at an angle of 45 degrees in an inclined mode inside every 2 m/channel, water pressure when the high water level outside the formwork is balanced is used for dismantling internal support after the bearing platform steel reinforcement framework is installed.
(7) Form removal
After the construction of the bearing platform, the steel formwork on the upper layer is firstly dismantled, then the breaking hammer is adopted to break the bottom sealing concrete, and the steel formwork on the lower layer is dismantled.
Compared with the prior art, the invention has the beneficial effects that: the steel template has reliable integrity and good waterproofness, is favorable for being assembled in blocks for repeated use, can be waterproof and can be used as a foundation or bearing platform construction template. As a temporary maintenance structure, the steel form can be used in a turnover way, and the engineering cost is low.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.
FIG. 1 is a first schematic structural diagram of the present invention.
FIG. 2 is a second structural diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are provided only for illustrating the present invention and are not intended to limit the scope of the present invention.
526 national Daishan engineering control engineering-new Jiangnan bridge, the main bridge of the new Jiangnan bridge is provided with two dumbbell-shaped bearing platforms, and the foundation of the bearing platforms is a bored pile with the diameter of 1.8 m. The pile cap P23 is located at the edge of the coast and is affected by tide, and the elevation of the water level at the low tide level is-0.8 m and is lower than the elevation of the bottom of the pile cap by-0.43 m. The pre-buried steel template is adopted for water prevention during construction of the P23 bearing platform, and simultaneously, the pre-buried steel template is also used as a bearing platform template, so that the inside of the bearing platform is in an anhydrous state during construction, and the construction requirement is met.
A waterproof construction method for a large-volume bearing platform in water comprises the following steps:
(1) And (3) measurement and paying-off:
measuring and releasing a side line of a bearing platform and an excavation side line of the foundation pit at a low tide level or a dry period;
(2) Excavation of a foundation pit:
excavating a foundation pit according to the excavation sideline, and enabling the excavation elevation to be 70cm below the elevation of the bottom of the bearing platform;
(3) Substrate treatment:
in a low tide level or low water period, cleaning mud at the bottom of a foundation pit by using a mud pump, laying a layer of impermeable geotextile 1, then pouring a C20 concrete cushion layer 2 with the thickness of 20cm, wherein the sizes of the impermeable geotextile 1 and the cushion layer 2 exceed the size of a bearing platform by 1m, and providing a working surface for the subsequent installation of a first layer of steel templates;
(4) Processing a steel template:
processing into an upper steel template and a lower steel template according to the height of the bearing platform; the lower section of steel template 3 is expected to be embedded with 50cm of concrete and exposed for 1m, the upper section of steel template 4 is the height of the residual bearing platform, and the thickness of the steel template panel is at least 6mm; when the steel template is processed, the seam of the steel plate is fully welded, so that water leakage is avoided; the steel templates are pre-assembled in a processing plant, so that the tight splicing seams of the templates are ensured;
(5) Installing a first layer of steel templates:
in order to ensure accurate positioning of the embedded steel templates, 16# I-steel 5 is welded and fixed on two adjacent pile foundation steel casing, C28 steel bars are welded on the I-steel 5 at equal intervals to serve as positioning piles 6, and the length of the steel bars is calculated through measuring coordinates; after the positioning pile 6 is welded, hoisting a first section of steel template 3 at a low tide level or in a dry season, and positioning each section of steel template by means of double control of a measuring sideline and the positioning pile 6;
customizing a water-swelling rubber strip 7 according to the thickness of a template (the width of a back rib and the thickness of a panel), erecting bolt holes on the rubber strip according to the distance between the bolt holes, sticking the water-swelling rubber strip 7 between the joints of each section of template, and then screwing the bolts to fix the template; after all the first-layer templates 3 are assembled at the designed positions, pouring 50 cm-thick bottom sealing concrete 8, and burying the first-layer templates 3 in the concrete 8;
(6) Second layer steel form installation
Set up water-swelling rubber strip 7 at 3 top surfaces of first layer steel form, then install second layer steel form 4, after second layer steel form 4 installation, every 2 m/way, carry out slant 45 jiaos of support with 10# I-steel in inside, carry out slant 45 jiaos of 10# I-steel inside support 9 in every 2 m/way in inside promptly, water pressure when balancing the outside high water level of template, after cushion cap framework of steel reinforcement installation is accomplished, demolish inside support 9.
(7) Form removal
After the construction of the bearing platform, the steel formwork 4 of the second layer is dismantled, then the sealing concrete 8 is broken by a breaking hammer, and the steel formwork 3 of the first layer is dismantled.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (1)
1. A waterproof construction method for a large-volume bearing platform in water is characterized by comprising the following steps:
(1) And (3) measurement and paying-off:
measuring and releasing a side line of a bearing platform and an excavation side line of the foundation pit at a low tide level or a dry period;
(2) Excavation of a foundation pit:
excavating a foundation pit according to the excavation sideline, and excavating the elevation to be 70cm below the elevation of the bottom of the bearing platform;
(3) Substrate treatment:
in a low tide level or low water period, cleaning mud at the bottom of a foundation pit by using a mud pump, laying a layer of impermeable geotextile, then pouring a C20 concrete cushion layer with the thickness of 20cm, wherein the sizes of the impermeable geotextile and the cushion layer exceed the size of a bearing platform by 1m, and providing a working surface for the subsequent installation of a first layer of steel formwork;
(4) Processing a steel template:
processing into an upper section steel template and a lower section steel template according to the height of the bearing platform; the lower section of steel template is expected to be embedded with 50cm of concrete and exposed for 1m, the upper section of steel template is the height of the residual bearing platform, and the thickness of the steel template panel is at least 6mm; when the steel template is processed, the seam of the steel plate is fully welded, so that water leakage is avoided;
the steel templates are pre-assembled in a processing factory, so that the tight splicing of the templates is ensured;
(5) Installing a first layer of steel templates:
in order to ensure accurate positioning of the embedded steel templates, welding and fixing 16# I-steel on two adjacent pile foundation steel casing, welding C28 steel bars on the I-steel at equal intervals to serve as positioning piles, and calculating the length of the steel bars through measuring coordinates; after the positioning pile is welded, hoisting a first section of steel template at a low tide level or in a dry season, and positioning each section of steel template by means of double control of a measuring sideline and the positioning pile;
customizing a water-swelling rubber strip according to the thickness of the template, erecting bolt holes on the rubber strip according to the bolt hole intervals, sticking the water-swelling rubber strip between the abutted seams of each section of template, and then screwing the bolts to fix the template; after the first layer of templates are completely assembled at the design position, pouring 50 cm-thick bottom sealing concrete, and embedding the first layer of templates into the concrete;
(6) Second layer steel form installation
Arranging a water-swelling rubber strip on the top surface of the first layer of steel formwork, then installing a second layer of steel formwork, after the second layer of steel formwork is installed, carrying out oblique 45-degree angle support inside by using 10# I-steel every 2 m/channel, balancing the water pressure at the high water level outside the formwork, and after the bearing platform steel reinforcement framework is installed, removing the internal support;
(7) Form removal
After the construction of the bearing platform, the steel formwork on the upper layer is firstly dismantled, then the breaking hammer is adopted to break the bottom sealing concrete, and the steel formwork on the lower layer is dismantled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111208108.6A CN113863355B (en) | 2021-10-18 | 2021-10-18 | Waterproof construction method for large-volume bearing platform in water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111208108.6A CN113863355B (en) | 2021-10-18 | 2021-10-18 | Waterproof construction method for large-volume bearing platform in water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113863355A CN113863355A (en) | 2021-12-31 |
| CN113863355B true CN113863355B (en) | 2023-02-24 |
Family
ID=78999841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111208108.6A Active CN113863355B (en) | 2021-10-18 | 2021-10-18 | Waterproof construction method for large-volume bearing platform in water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113863355B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104631338A (en) * | 2015-02-16 | 2015-05-20 | 中交第二航务工程局有限公司 | Steel boxed cofferdam and positioning construction method |
| CN104805857A (en) * | 2015-05-06 | 2015-07-29 | 中铁十六局集团第三工程有限公司 | Detachable cyclic utilization bottomless steel jacket box and construction method thereof |
| CN105220703A (en) * | 2015-09-11 | 2016-01-06 | 安徽省公路桥梁工程有限公司 | A kind of sand flat enclosure-type deep water construction method under weighing apparatus method condition based on returning |
| CN107288156A (en) * | 2017-07-27 | 2017-10-24 | 平湖市开元混凝土有限公司 | A kind of construction method in the special-shaped pond in underground |
| CN210216493U (en) * | 2019-06-12 | 2020-03-31 | 中建二局第三建筑工程有限公司 | Drainage type tower crane foundation structure |
-
2021
- 2021-10-18 CN CN202111208108.6A patent/CN113863355B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104631338A (en) * | 2015-02-16 | 2015-05-20 | 中交第二航务工程局有限公司 | Steel boxed cofferdam and positioning construction method |
| CN104805857A (en) * | 2015-05-06 | 2015-07-29 | 中铁十六局集团第三工程有限公司 | Detachable cyclic utilization bottomless steel jacket box and construction method thereof |
| CN105220703A (en) * | 2015-09-11 | 2016-01-06 | 安徽省公路桥梁工程有限公司 | A kind of sand flat enclosure-type deep water construction method under weighing apparatus method condition based on returning |
| CN107288156A (en) * | 2017-07-27 | 2017-10-24 | 平湖市开元混凝土有限公司 | A kind of construction method in the special-shaped pond in underground |
| CN210216493U (en) * | 2019-06-12 | 2020-03-31 | 中建二局第三建筑工程有限公司 | Drainage type tower crane foundation structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113863355A (en) | 2021-12-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110485470B (en) | Rectangular working well with pre-arranged jacking pipe door opening and sliding type rear wall in water-rich stratum and construction method of rectangular working well | |
| CN102454167B (en) | The construction method of especially big & deep open caisson | |
| EP3118374A1 (en) | Hollow cylindrical pier for fixing offshore platform structure to bed and method of installing and constructing same | |
| CN111593728A (en) | Embedded rock-socketed pile 'pile-first method' interpolation type jacket foundation construction system | |
| CN102979069A (en) | Bored pile platform construction method on covering-free steep bare rock in deepwater and rapid stream | |
| CN101736744A (en) | Self-balancing sinking large-diameter tubular pile and construction method thereof | |
| US11840817B2 (en) | Method for constructing steel sheet pile cofferdam on deep sand gravel overburden layer | |
| CN102561371A (en) | Steel caisson enclosure structure at island-tunnel combination part | |
| CN110820765A (en) | Prefabricated enclosure structure for narrow deep foundation pit and construction method | |
| CN114411756A (en) | Construction method and construction device for water-rich sand layer subway station open excavation foundation pit without precipitation | |
| CN114033388B (en) | Shaft construction method for water-rich silty sand layer underground tunnel roof pipe | |
| CN111733853A (en) | Tongue-and-groove type prefabricated underground continuous wall structure | |
| CN110565686A (en) | Construction method for penetrating river channel under pipe gallery | |
| CN111794256A (en) | Construction method of underwater pile cap in river flood discharge area | |
| CN106988337A (en) | Reinforcing method for reducing uneven settlement of strip-shaped shallow foundation house | |
| CN113863355B (en) | Waterproof construction method for large-volume bearing platform in water | |
| CN215715333U (en) | Pre-buried device of flow plasticity geology bottom plate construction | |
| CN111980039B (en) | Construction method and structure of steel sheet pile cofferdam in tidal zone of sea area | |
| CN113202106B (en) | Deep foundation pit excavation method | |
| CN219547842U (en) | Steel sheet pile cofferdam structure | |
| CN103711136B (en) | The construction technology of bridge deep embeded type cushion cap curtain structure | |
| Dhar et al. | Construction of deep water pile and pile cap by using prefabricated steel coffer dam technique | |
| CN115467339B (en) | Construction method of river abutment foundation under condition of soft soil close to shallow tunnel coverage layer | |
| CN114809106B (en) | Construction method of combined protection structure of existing tunnel | |
| CN115404889B (en) | Urban municipal engineering open caisson construction device and construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |