CN113931228B - Material platform construction method for basement construction - Google Patents
Material platform construction method for basement construction Download PDFInfo
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- CN113931228B CN113931228B CN202111226943.2A CN202111226943A CN113931228B CN 113931228 B CN113931228 B CN 113931228B CN 202111226943 A CN202111226943 A CN 202111226943A CN 113931228 B CN113931228 B CN 113931228B
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- material platform
- foundation pit
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- steel sheet
- basement
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- 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
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- 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
- E02D17/18—Making embankments, e.g. dikes, dams
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- 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
- E02D17/20—Securing of slopes or inclines
- E02D17/207—Securing of slopes or inclines with means incorporating sheet piles or piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Environmental & Geological Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention provides a material platform construction method for basement construction, which comprises the following steps: step one, searching a position which has a larger distance from an outer wall and relatively convenient traffic or has a looser slope space at the edge of a position where basement deep foundation pit construction is performed in advance to serve as a construction site of a material platform, wherein the construction site of the material platform comprises a deep foundation pit and an open space adjacent to the deep foundation pit; step two, excavating a basement deep foundation pit, making a slope at the edge of the deep foundation pit, and enclosing a concrete support pile; thirdly, excavating a shallow foundation pit in the open ground outside the support pile in the construction site of the preselected material platform; fourthly, embedding steel sheet piles at the edge of the construction site of the material platform; fifthly, performing back pressure slope protection on the bottom of one side of the steel sheet pile in the deep foundation pit; and sixthly, carrying out layered backfilling in the deep foundation pit and the shallow foundation pit. The invention makes full use of the construction site, has scientific and reasonable construction steps and improves the construction efficiency.
Description
Technical Field
The invention belongs to the field of building construction, and particularly relates to a material platform construction method for basement construction.
Background
The foundation pit refers to a space below the ground excavated for the construction of a foundation and a basement of a building (including a structure), namely, a soil pit excavated at a design position of the foundation according to the elevation of the foundation and the plane size of the foundation. Before excavation, an excavation scheme is determined according to geological and hydrological data and the conditions of buildings nearby the site, and waterproof drainage work is well done. The person who is not excavated can use the method of putting side slope to make the earth slope stable, and the size of the slope is determined according to the relevant construction project. When a deeper foundation pit and a building adjacent to the deeper foundation pit are excavated, a foundation pit wall supporting method, a concrete-sprayed wall protecting method and a large foundation pit are used, and even an underground continuous wall and a columnar column type bored pile are used for interlocking, so that an outer soil layer is prevented from collapsing; for those who have no influence on nearby buildings, the underground water level can be reduced by a well point method, and slope releasing open cut is adopted; in cold regions, natural cold air freezing method can be adopted for excavation and the like.
Along with the continuous development of society, urban land is more and more nervous, in order to make full use of development land, often need carry out the excavation of basement foundation ditch in the construction, during the construction, because excavation has all been carried out to most space in the place, often can't reserve the place that processing material used, carry out material processing outside the construction place among the prior art usually, reuse tower crane mode of transporting by hand the good material of processing to the construction place in, this method conveying efficiency is low, consumes a large amount of manpower and materials, and is with high costs, and has the potential safety hazard.
Disclosure of Invention
The invention provides a material platform construction method for basement construction, which aims to solve the problems in the prior art.
The invention provides a material platform construction method for basement construction, which comprises the following steps:
step one, searching a position which has a large distance from an outer wall and relatively convenient traffic or has a loose slope space at the edge of a position where basement deep foundation pit construction is performed in advance to serve as a construction site of a material platform, wherein the construction site of the material platform comprises a deep foundation pit and an open space adjacent to the deep foundation pit;
step two, excavating a basement deep foundation pit, making a slope at the edge of the deep foundation pit, and enclosing a concrete support pile;
thirdly, excavating a shallow foundation pit in the open ground outside the support pile in the construction site of the preselected material platform;
embedding steel sheet piles at the edges of the construction site of the material platform, and fixedly mounting enclosing purlins at the tops of the steel sheet piles;
fifthly, performing back pressure slope protection on the bottom of one side of the steel sheet pile in the deep foundation pit;
step six, carrying out layered backfilling in the deep foundation pit and the shallow foundation pit;
step seven, pouring a concrete layer at the position of the filled material platform to form a bottom plate;
step eight, carrying out simulation checking calculation on the bearing condition of the material platform, and determining the bearing capacity of the material platform;
step nine, building a protection shed and a protection railing;
and step ten, after the construction of the basement is completed, removing the material platform, removing the steel sheet piles, and backfilling earthwork at the bottom of the material platform for a basement fertilizer groove area.
Further, in the fourth step, the type of the steel sheet pile is 40B; and the steel sheet piles positioned at the edge of the deep foundation pit are constructed in one-to-one mode, and the distance between the steel sheet piles is 400m.
Further, in the fourth step, the type of the steel sheet pile is 40B; and the distance between the steel plate piles at the edge of the shallow foundation pit is 4m.
Furthermore, in the fourth step, the length of the steel sheet pile embedded in the earth at the edge of the deep foundation pit accounts for two thirds of the whole length of the steel sheet pile.
Furthermore, in the fourth step, the horizontal supporting beam penetrates through the steel sheet piles, a brick layer is built between the steel sheet piles at the two ends of the horizontal supporting beam and used for filling the gaps between the steel sheet piles, I-shaped steel and tie bars are embedded in the brick layer, and the tie bars are welded on the I-shaped steel and used for improving the bearing capacity of the brick layer.
Furthermore, in the sixth step, the height of the upper surface of the backfilled earthwork higher than the top surface of the support pile is more than or equal to 1.5m.
Further, the brick layer height is 400mm about the horizontal supporting beam, just the brick layer is the shale brick layer.
Further, in the fifth step, the coefficient of the back-pressure slope protection slope is 1:2.
furthermore, in the third step, a waterproof curtain is arranged on one side of the supporting pile, which is positioned on the shallow foundation pit.
Further, the waterproof curtain is a single-row double-shaft cement soil mixing pile.
The invention has the advantages and positive effects that:
1. the material platform construction method for basement construction utilizes the open space between the edge of the basement foundation pit and the edge of the outer wall to serve as a site for processing materials, greatly improves the space utilization rate, can be directly used after the materials are processed on the material platform, does not need long-distance transportation, simplifies the construction steps, shortens the construction period, effectively improves the construction efficiency, saves the cost required by transportation, and reduces the potential safety hazard.
2. According to the material platform construction method for basement construction, the filling earthwork under the bottom plate of the material platform can be used as the backfill soil of the later-stage fertilizer groove area, so that the later-stage backfill engineering quantity is reduced, the construction steps are optimized, and the construction efficiency is further improved.
3. According to the material platform construction method for basement construction, the steel sheet piles are used for supporting, the construction process is simple and efficient, the basement foundation pit construction is completed, the steel sheet piles can be recycled after being dismantled, and the construction cost is further reduced.
4. The construction method fully utilizes the construction site, is not limited by narrow site space, has scientific and reasonable construction steps, effectively improves the construction efficiency, is simple and convenient, saves the cost and has low potential safety hazard.
Drawings
FIG. 1 is a schematic view of a basement construction site according to the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1 according to the present invention;
FIG. 3 is a cross-sectional view taken along line B of FIG. 2 in accordance with the present invention;
fig. 4 is a schematic structural view of the position where the horizontal support beam passes through the steel sheet pile according to the present invention.
In the figure, 1 is a deep foundation pit, 2 is a horizontal supporting beam, 3 is a supporting pile, 4 is a shallow foundation pit, 5 is a steel sheet pile, 6 is a water curtain, 7 is a bottom plate, and 8 is a brick layer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The invention provides a material platform construction method for basement construction, which comprises the following steps:
firstly, searching a space with larger distance from an outer wall and relatively convenient traffic or a position with loose slope space at the edge of a construction position of a deep foundation pit 1 of a pre-made basement as a construction site of a material platform, wherein the construction site of the material platform comprises the deep foundation pit 1 and an open space adjacent to the deep foundation pit 1;
step two, excavating the basement deep foundation pit 1, making a slope at the edge of the deep foundation pit 1, and enclosing a concrete support pile 3;
thirdly, excavating a shallow foundation pit 4 in the open ground outside the support pile 3 in the construction site of the preselected material platform;
embedding steel sheet piles 5 at the edges of the construction site of the material platform, fixedly mounting enclosing purlins at the tops of the steel sheet piles 5, and welding all the steel sheet piles 5 into a whole through the enclosing purlins;
fifthly, performing back pressure slope protection on the bottom of one side of the steel sheet pile 5 in the deep foundation pit 1;
step six, carrying out layered backfilling in the deep foundation pit 1 and the shallow foundation pit 4;
step seven, pouring a concrete layer at the position of the filled material platform to form a bottom plate 7;
step eight, carrying out simulation checking calculation on the bearing condition of the material platform, and determining the bearing capacity of the material platform;
step nine, erecting a protective shed and protective railings, and putting the material platform into use;
and step ten, after the construction of the basement is finished, dismantling the material platform, dismantling the steel sheet pile 5, and using the earthwork at the bottom of the material platform as the backfill of the basement fertilizer groove area.
In the fourth step, the type of the steel sheet pile 5 is 40B. And the steel sheet piles 5 positioned at the edge of the deep foundation pit 1 are constructed in one-to-one mode, and the distance between the steel sheet piles is 400m. And the distance between the steel sheet piles 5 positioned at the edge of the shallow foundation pit 4 is 4m.
In the fourth step, the length of the steel sheet piles 5 embedded in the earth at the edge of the deep foundation pit 1 accounts for two thirds of the whole length of the steel sheet piles 5, so that the steel sheet piles 5 are firm and are not easy to collapse.
As shown in fig. 4, in the fourth step, the horizontal supporting beam 2 penetrates through the steel sheet piles 5, a brick layer 8 is built between the steel sheet piles 5 at two ends of the horizontal supporting beam 2 and used for filling up the gaps between the steel sheet piles 5, i-shaped steel and tie bars are buried in the brick layer 8, and the tie bars are welded on the i-shaped steel and used for improving the bearing capacity of the brick layer 8. Further, the brick layer 8 height of horizontal supporting beam 2 upper and lower is 400mm, brick layer 8 is shale brick layer 8.
In the sixth step, the height of the upper surface of the backfilled earthwork higher than the top surface of the supporting pile 3 is more than or equal to 1.5m.
In the fifth step, the slope release coefficient of the back-pressure protection slope is 1.
And seventhly, pouring C20 concrete with the thickness of 200 mm.
And in the third step, a waterproof curtain 6 is arranged on one side of the support piles 3, which are positioned in the shallow foundation pit 4. Further, the waterproof curtain 6 is a single-row double-shaft cement soil mixing pile. And (5) lowering water in a pipe well in the foundation pit, and arranging an observation well outside the pit.
The material platform construction method utilizes the open space between the edge of the basement foundation pit and the edge of the outer wall to serve as a site for processing materials, greatly improves the space utilization rate, can be directly used after the materials are processed on the material platform, does not need long-distance transportation, simplifies the construction steps, shortens the construction period, effectively improves the construction efficiency, saves the cost required by transportation, and reduces the potential safety hazard.
In the material platform construction method, the filling earthwork under the bottom plate of the material platform can be used as the backfill soil of the later-stage fertilizer groove area, so that the later-stage backfill engineering quantity is reduced, the construction steps are optimized, and the construction efficiency is further improved.
In the material platform construction method, the steel sheet piles are used for supporting, the construction process is simple and efficient, the basement foundation pit construction is completed, the steel sheet piles can be recycled after being dismantled, and the construction cost is further reduced.
The construction method fully utilizes the construction site, is not limited by narrow site space, has scientific and reasonable construction steps, effectively improves the construction efficiency, is simple and convenient, saves the cost and has low potential safety hazard.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A material platform construction method for basement construction is characterized by comprising the following steps:
step one, a position which has a large distance from an outer wall and relatively convenient traffic or a position with a loose slope space is searched at the edge of a construction position of a deep foundation pit (1) of a pre-made basement to serve as a construction site of a material platform, wherein the construction site of the material platform comprises the deep foundation pit (1) and an open space adjacent to the deep foundation pit (1);
step two, excavating the basement deep foundation pit (1), making a slope at the edge of the deep foundation pit (1), and enclosing concrete support piles (3);
thirdly, excavating a shallow foundation pit (4) in the open ground outside the support pile (3) in the construction site of the preselected material platform;
fourthly, embedding a steel sheet pile (5) at the edge of the construction site of the material platform, and fixedly installing an enclosing purlin at the top of the steel sheet pile (5);
fifthly, performing back pressure slope protection on the bottom of one side of the steel sheet pile (5) in the deep foundation pit (1);
step six, carrying out layered backfilling in the deep foundation pit (1) and the shallow foundation pit (4);
step seven, pouring a concrete layer at the position of the filled material platform to form a bottom plate (7);
eighthly, carrying out simulation checking calculation on the bearing condition of the material platform, and determining the bearing capacity of the material platform;
step nine, building a protective shed and a protective handrail;
and step ten, after the construction of the basement is finished, removing the material platform, removing the steel sheet pile (5), and using earthwork at the bottom of the material platform as backfill of a basement fertilizer groove area.
2. The material platform construction method for basement construction according to claim 1, wherein in the fourth step, the steel sheet pile (5) is 40B; and the steel sheet piles (5) positioned at the edge of the deep foundation pit (1) are constructed in one-to-one mode, and the distance between the steel sheet piles is 400m.
3. The material platform construction method for basement construction according to claim 1, wherein in the fourth step, the steel sheet pile (5) is 40B; and the distance between the steel sheet piles (5) positioned at the edge of the shallow foundation pit (4) is 4m.
4. The material platform construction method for basement construction according to claim 1, wherein in the fourth step, the length of the steel sheet pile (5) at the edge of the deep foundation pit (1) buried in the earth is two thirds of the total length of the steel sheet pile (5).
5. The material platform construction method for basement construction according to claim 1, wherein in the fourth step, a horizontal support beam (2) penetrates through the steel sheet piles (5), a brick layer (8) is built between the steel sheet piles (5) at two ends of the horizontal support beam (2) and used for filling the gap between the steel sheet piles (5), I-shaped steel and tie bars are buried in the brick layer (8), and the tie bars are welded on the I-shaped steel and used for improving the bearing capacity of the brick layer (8).
6. The material platform construction method for basement construction according to claim 1, wherein in the sixth step, the height of the upper surface of the earth after backfilling higher than the top surface of the support pile (3) is more than or equal to 1.5m.
7. The material platform construction method for basement construction according to claim 5, characterized in that the height of the brick layer (8) above and below the horizontal supporting beam (2) is 400mm, and the brick layer (8) is shale brick layer (8).
8. The material platform construction method for basement construction according to claim 1, wherein in the fifth step, the coefficient of the back pressure slope protection slope release is 1:2.
9. the material platform construction method for basement construction according to claim 1, characterized in that in step three, a waterproof curtain (6) is arranged on one side of the supporting pile (3) of the shallow foundation pit (4).
10. The material platform construction method for basement construction according to claim 9, wherein the waterproof curtain (6) is a single row biaxial cement soil mixing pile.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111226943.2A CN113931228B (en) | 2021-10-21 | 2021-10-21 | Material platform construction method for basement construction |
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| CN202111226943.2A CN113931228B (en) | 2021-10-21 | 2021-10-21 | Material platform construction method for basement construction |
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| CN113931228A CN113931228A (en) | 2022-01-14 |
| CN113931228B true CN113931228B (en) | 2023-01-10 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207143966U (en) * | 2017-08-09 | 2018-03-27 | 中国建筑第八工程局有限公司 | The discharging platform on foundation ditch side |
| CN110886317A (en) * | 2019-12-10 | 2020-03-17 | 中国十七冶集团有限公司 | Foundation trench earthwork backfill construction method for steel sheet pile supporting structure of urban comprehensive pipe gallery |
| CN111395353A (en) * | 2019-12-07 | 2020-07-10 | 中冶天工集团有限公司 | Foundation pit supporting device and method based on combination of steel sheet piles and vertical inclined struts |
| CN111676972A (en) * | 2020-07-10 | 2020-09-18 | 赵琰 | Safe operation platform of construction usefulness on foundation ditch |
| WO2021000444A1 (en) * | 2019-07-01 | 2021-01-07 | 济南轨道交通集团有限公司 | Foundation reinforcement structure and method for hoisting heavy equipment close to unclosed building |
| CN112281857A (en) * | 2020-10-19 | 2021-01-29 | 中铁六局集团有限公司 | Deep foundation pit excavation construction method |
| CN113502824A (en) * | 2021-07-08 | 2021-10-15 | 中国建筑第八工程局有限公司 | Construction method for quickly unearthing annular road in deep foundation pit by combining trestle with construction method |
-
2021
- 2021-10-21 CN CN202111226943.2A patent/CN113931228B/en active Active
Patent Citations (7)
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|---|---|---|---|---|
| CN207143966U (en) * | 2017-08-09 | 2018-03-27 | 中国建筑第八工程局有限公司 | The discharging platform on foundation ditch side |
| WO2021000444A1 (en) * | 2019-07-01 | 2021-01-07 | 济南轨道交通集团有限公司 | Foundation reinforcement structure and method for hoisting heavy equipment close to unclosed building |
| CN111395353A (en) * | 2019-12-07 | 2020-07-10 | 中冶天工集团有限公司 | Foundation pit supporting device and method based on combination of steel sheet piles and vertical inclined struts |
| CN110886317A (en) * | 2019-12-10 | 2020-03-17 | 中国十七冶集团有限公司 | Foundation trench earthwork backfill construction method for steel sheet pile supporting structure of urban comprehensive pipe gallery |
| CN111676972A (en) * | 2020-07-10 | 2020-09-18 | 赵琰 | Safe operation platform of construction usefulness on foundation ditch |
| CN112281857A (en) * | 2020-10-19 | 2021-01-29 | 中铁六局集团有限公司 | Deep foundation pit excavation construction method |
| CN113502824A (en) * | 2021-07-08 | 2021-10-15 | 中国建筑第八工程局有限公司 | Construction method for quickly unearthing annular road in deep foundation pit by combining trestle with construction method |
Non-Patent Citations (1)
| Title |
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| 栈桥支撑体系在超大超深基坑中的应用;程知言等;《施工技术》;20090628;全文 * |
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