CN113463647A - Construction method for steel sheet pile support serving as foundation pit top water interception and safety protection measures - Google Patents
Construction method for steel sheet pile support serving as foundation pit top water interception and safety protection measures Download PDFInfo
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- CN113463647A CN113463647A CN202110654981.1A CN202110654981A CN113463647A CN 113463647 A CN113463647 A CN 113463647A CN 202110654981 A CN202110654981 A CN 202110654981A CN 113463647 A CN113463647 A CN 113463647A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 104
- 239000010959 steel Substances 0.000 title claims abstract description 104
- 238000010276 construction Methods 0.000 title claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 238000009412 basement excavation Methods 0.000 claims description 8
- 239000002689 soil Substances 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 238000010009 beating Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 10
- 238000009434 installation Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/02—Making or lining canals
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D11/00—Methods or apparatus specially adapted for both placing and removing sheet pile bulkheads, piles, or mould-pipes
-
- 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
- E02D17/06—Foundation trenches ditches or narrow shafts
- E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
-
- 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
- E02D19/06—Restraining of underground water
- E02D19/08—Restraining of underground water by employing open ditches arranged below the level of the water
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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
-
- 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
- E02D5/16—Auxiliary devices rigidly or detachably arranged on sheet piles for facilitating assembly
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/18—Placing by vibrating
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention relates to a construction method for a steel sheet pile support serving as a foundation pit top water interception and safety protection measure, which comprises the following steps of: measuring and lofting; drawing a steel sheet pile control line; inserting and driving steel sheet piles to a set elevation; setting up enclosing purlins and supports; excavating earth; dismantling the supports, the enclosing purlins and the steel sheet piles; the invention discloses a treatment method of a steel sheet pile pulling-out part, which overturns the traditional steel sheet pile construction method, and tries to arrange the pile top of the steel sheet pile at a position 1.20m away from the ground for the first time, and an inner support is arranged at a position 0.70m away from the ground, so that the structure and personnel safety of a support structure under stress are realized, the steel sheet pile is adopted for intercepting water at the top of a foundation pit, a larger operation space is created for an earth-moving machine, and the protection of the adjacent edge of the foundation pit is better realized.
Description
Technical Field
The invention relates to the field of concrete foundation construction, in particular to a construction method for a steel sheet pile support serving as a foundation pit top water interception and safety protection measure.
Background
At present, when foundation pit operation is carried out in the southern coastal region in the flood season, the problems that the operation space around the foundation pit is limited and a catchwater ditch cannot be excavated are often encountered; particularly, when the project construction period is short, the foundation pit excavation earthwork is poor in soil quality and abundant in underground water, the process connection rhythm is required to be fast, and excessive drainage measures cannot be taken; in order to save the steel sheet pile leasing cost, the steel sheet pile needs to be used reversely, the existing steel sheet pile supporting mode cannot stop water at the top of the foundation pit, the operation space of the excavating machinery is limited, and the condition that the stress of the supporting structure is still safe when the condition occurs cannot be guaranteed.
In summary, the existing steel sheet pile supporting method obviously still has defects, and further improvement is urgently needed.
Disclosure of Invention
In order to overcome the technical defects and shortcomings, the invention provides a construction method for supporting a steel sheet pile and serving as a water-stopping and safety protection measure at the top of a foundation pit, which not only enables the stress of a steel sheet pile supporting structure to be safer, but also can stop water at the top of the foundation pit and create a larger operation space for an earth-moving machine.
In order to achieve the purpose, the invention provides a construction method for a steel sheet pile support to be used as a water interception and safety protection measure at the top of a foundation pit, which comprises the following steps:
(I) measurement lofting
Reserving an operation surface with the width of 1.0m on each side according to the design, and measuring and placing by using a total station to determine a position line of the steel sheet pile;
(II) pulling steel sheet pile control line
According to the measured position line of the steel sheet pile, a steel sheet pile control line is pulled;
(III) inserting and driving the steel sheet pile to a set elevation
Adopting a digging machine and a vibration hammer for beating;
(IV) setting purlin and support
Welding brackets on the steel sheet piles according to the designed number, arranging the enclosing purlins on the brackets, and arranging the supports on the enclosing purlins;
(V) earth excavation
After the enclosing purlin and the support are set, excavating to a height of 20cm from the substrate by using an excavator;
(VI) dismantling the support, purlin and steel sheet pile
After the ditch concrete is poured, after the concrete is cured to meet the strength, backfilling a foundation pit, and removing a steel sheet pile;
(VII) treatment of steel sheet pile pulling-out part
And backfilling the pulled part of the steel sheet pile by adopting medium coarse sand, and backfilling a gap between the steel sheet pile and the ditch by using plain soil after the ditch template and the ditch construction scaffold are removed.
Preferably, the steel sheet pile top is arranged at a position 1.20m away from the ground.
Preferably, the support mounting is provided at a position of 0.70m from the ground.
Preferably, in the second step, the steel sheet pile control line is formed by pulling and tightening a nylon rope.
Preferably, in the third step, when the steel sheet pile is inserted and driven, driving is performed sequentially from one end to the other end, so as to ensure that the locking notch of the steel sheet pile is closed.
Preferably, in step four, the enclosing purlins are arranged between the brackets and the supports and the enclosing purlins are welded tightly.
Preferably, in the fifth step, after excavating to the elevation 20cm away from the base by using an excavator, manually excavating to the designed elevation of the bottom of the foundation pit.
Preferably, in the seventh step, the gap between the steel sheet pile and the water channel is backfilled with plain soil, and the excavator vibration hammer is adopted for layering, leveling and compacting.
The embodiment of the invention has the following effects:
the steel sheet pile top is arranged at a position 1.20m away from the ground, the inner support is arranged at a position 0.70m away from the ground, the purposes that the supporting structure is still safe in stress and water is blocked at the top of the foundation pit are achieved, a larger operation space is created for the earth moving machinery, the conditions that the supporting structure is arranged in an advanced mode and then the excavation is carried out are met, and the foundation pit edge protection is achieved to a certain extent.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic plan view showing an installation structure of a steel sheet pile, a purlin and a steel sheet pile, which are used for supporting and enclosing the steel sheet pile and serving as a construction method for water interception at the top of a foundation pit and a safety protection measure in the embodiment of the invention;
fig. 2 shows a three-dimensional schematic view of a mounting structure of a steel sheet pile, an enclosing purlin and a steel sheet pile in a construction method in which a steel sheet pile support is used as a foundation pit top water interception and safety protection measure according to the embodiment of the invention;
fig. 3 shows a construction effect diagram of an installation structure of a steel sheet pile, a surrounding purlin and a steel sheet pile in a construction method in which a steel sheet pile support is used as a foundation pit top water interception and safety protection measure, according to an embodiment of the invention.
Reference numerals: support 01, enclose purlin 02, steel sheet pile 03, bracket 04, foundation ditch 05, construction road 06.
Detailed description of the preferred embodiments 004
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, and that all other embodiments that would be apparent to one skilled in the art without the benefit of this disclosure are intended to be included within the scope of the present invention.
In some of the flows described in the description and claims of the invention and in the above figures, a number of operations are included that occur in a particular order, but it should be clearly understood that these operations may be performed out of order or in parallel as they occur herein. Additionally, the flows may include more or fewer operations and the operations may be performed out of order or in parallel as they appear herein.
The terms "comprises," "comprising," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or modules is not necessarily limited to those steps or modules explicitly listed, but may include other steps or modules not expressly listed or inherent to such process, method, article, or apparatus.
As can be understood by those skilled in the art, when the foundation pit works in the flood season of the southern coastal region, the intercepting ditch can not be excavated due to the limited working space around the foundation pit; especially, when project construction period is short, foundation pit excavation earthwork soil quality is poor, underground water is abundant, process connection needs to be accelerated especially, and excessive drainage measures are difficult to take; meanwhile, in order to save the steel sheet pile leasing cost, the steel sheet pile needs to be used reversely, and a simple and quick installation mode needs to be adopted in a supporting mode.
In order to solve the above problems, the present invention provides a construction method for a steel sheet pile support to be used as a water-stopping and safety protection measure for the top of a foundation pit, which is described with reference to one embodiment, and the construction method includes the following steps:
(I) measurement lofting
Reserving an operation surface with the width of 1.0m on each side according to the design, and measuring and placing by using a total station to determine a position line of the steel sheet pile;
(II) pulling steel sheet pile control line
According to the measured position line of the steel sheet pile, a steel sheet pile control line is pulled;
(III) inserting and driving the steel sheet pile to a set elevation
Adopting a digging machine and a vibration hammer for beating; as can be understood by those skilled in the art, the conditions of underground pipelines and underground structures need to be found out before the construction, so as to avoid damage; before piling, the steel sheet piles are checked one by one, the steel sheet piles which are rusted and seriously deformed at the connecting locking notch are removed, and unqualified steel sheet piles can be used after being repaired; before piling, coating grease in the fore shaft of the sheet pile to facilitate driving and pulling out; and measuring and monitoring the inclination of each pile at any time in the inserting and driving process to be not more than 0.3%, and pulling and re-driving when the inclination is too large and cannot be adjusted by a pulling and aligning method.
(IV) setting purlin and support
Welding brackets according to the design quantity on the steel sheet piles, arranging the enclosing purlin on the brackets, and arranging the support on the enclosing purlin. As shown in fig. 1 to 3, respectively, a plan view of an installation structure, a three-dimensional view of the installation structure, and a construction effect view of the installation structure of a steel sheet pile, a surrounding purlin, and a supporting and surrounding purlin of a construction method in which a steel sheet pile support is also used as a water interception and safety protection measure at the top of a foundation pit are disclosed in the embodiments of the present invention.
(V) earth excavation
After the enclosing purlin and the support are set, excavating to a height of 20cm from the substrate by using an excavator;
(VI) dismantling the support, purlin and steel sheet pile
After the ditch concrete is poured, after the concrete is cured to meet the strength, backfilling a foundation pit, and removing a steel sheet pile;
(VII) treatment of steel sheet pile pulling-out part
And backfilling the pulled part of the steel sheet pile by adopting medium coarse sand, and backfilling a gap between the steel sheet pile and the ditch by using plain soil after the ditch template and the ditch construction scaffold are removed. When coarse sand backfilled in the adoption, the principle of removing vibration by utilizing the steel sheet pile is utilized to vibrate the sand layer compactly, and the mode of water injection is adopted simultaneously to ensure the wetting of sand so as to take the condition that no water is accumulated on the surface of the sand as the standard.
The steel sheet pile support is also used as a construction method for water interception and safety protection measures of the top of the foundation pit, wherein the pile top of the steel sheet pile is arranged at a position 1.20m away from the ground.
The steel sheet pile support is also used as a construction method for water interception and safety protection measures of the top of the foundation pit, wherein the support is arranged at a position 0.70m away from the ground.
As can be understood by those skilled in the art, in order to realize stress safety, the construction of the conventional steel sheet pile adopts the support of 1.0m below the ground level, and the support is arranged at the horizontal position of 1.50m below the ground.
The steel sheet pile support is also used as a construction method for water interception and safety protection measures of the top of the foundation pit, wherein in the second step, the steel sheet pile control line is formed by pulling and tightening nylon ropes.
The construction method of the steel sheet pile support which is used as the water interception and safety protection measure at the top of the foundation pit is adopted, wherein in the third step, when the steel sheet pile is inserted and beaten, the steel sheet pile is beaten from one end to the other end in sequence, so that the locking notch of the steel sheet pile is ensured to be closed.
The steel sheet pile support is also used as a construction method for water interception and safety protection measures at the top of the foundation pit, wherein in the fourth step, the enclosing purlins are arranged between the brackets, and the supports and the enclosing purlins are welded tightly.
And in the fifth step, after excavating to a height mark of 20cm away from the base by using an excavator, manually excavating to the designed height mark of the bottom of the foundation pit.
The construction method can realize the internal support of the steel sheet pile and the excavation of the foundation pit, and can perform better protection effect on the adjacent edge of the foundation pit.
And in the seventh step, a gap between the steel sheet pile and the water channel is backfilled with plain soil, and a vibration hammer of an excavator is adopted for layering, leveling and compacting. The construction method of the invention adopts the steel sheet pile to cut off water at the top of the foundation pit, can create larger operation space for the earth-moving machinery,
in conclusion, the invention discloses a construction method for supporting a steel sheet pile and serving as a water-stopping and safety protection measure at the top of a foundation pit, which improves the stress safety of a supporting structure, achieves the purpose of water stopping at the top of the foundation pit, is simple and quick in installation mode, and creates a larger operation space for an earth-moving machine.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A construction method for a steel sheet pile support to serve as a foundation pit top water interception and safety protection measure is characterized by comprising the following steps:
(I) measurement lofting
Reserving an operation surface with the width of 1.0m on each side according to the design, and measuring and placing by using a total station to determine a position line of the steel sheet pile;
(II) pulling steel sheet pile control line
According to the measured position line of the steel sheet pile, a steel sheet pile control line is pulled;
(III) inserting and driving the steel sheet pile to a set elevation
Adopting a digging machine and a vibration hammer for beating;
(IV) setting purlin and support
Welding brackets on the steel sheet piles according to the designed number, arranging the enclosing purlins on the brackets, and arranging the supports on the enclosing purlins;
(V) earth excavation
After the enclosing purlin and the support are set, excavating to a height of 20cm from the substrate by using an excavator;
(VI) dismantling the support, purlin and steel sheet pile
After the ditch concrete is poured, after the concrete is cured to meet the strength, backfilling a foundation pit, and removing a steel sheet pile;
(VII) treatment of steel sheet pile pulling-out part
And backfilling the pulled part of the steel sheet pile by adopting medium coarse sand, and backfilling a gap between the steel sheet pile and the ditch by using plain soil after the ditch template and the ditch construction scaffold are removed.
2. The construction method of the steel sheet pile support serving as a water interception and safety protection measure of the top of the foundation pit according to claim 1, wherein the pile top of the steel sheet pile is arranged at a position 1.20m away from the ground.
3. The construction method of the steel sheet pile support serving as a water interception and safety protection measure at the top of the foundation pit according to claim 1, wherein the support is installed at a position 0.70m away from the ground.
4. The construction method of the steel sheet pile support serving as the foundation pit top water interception and safety protection measure according to claim 1, wherein in the second step, the steel sheet pile control line is formed by pulling and tightening a nylon rope.
5. The construction method of claim 1, wherein in step three, when inserting and driving the steel sheet pile, the steel sheet pile is driven sequentially from one end to the other end to ensure the closure of the locking notch of the steel sheet pile.
6. The construction method of the steel sheet pile support serving as the foundation pit top water interception and safety protection measure according to claim 1, wherein in the fourth step, the enclosing purlins are arranged between the brackets, and the supports and the enclosing purlins are welded tightly.
7. The construction method of claim 1, wherein in the fifth step, after excavating to a height of 20cm from the base by using an excavator, the steel sheet pile support is manually excavated to the designed height of the base.
8. The construction method of claim 1, wherein in step seven, the gap between the steel sheet pile and the canal is backfilled with plain soil, and the excavation machine is adopted to strike, level and compact the steel sheet pile by layers by a vibratory hammer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110654981.1A CN113463647A (en) | 2021-06-11 | 2021-06-11 | Construction method for steel sheet pile support serving as foundation pit top water interception and safety protection measures |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110654981.1A CN113463647A (en) | 2021-06-11 | 2021-06-11 | Construction method for steel sheet pile support serving as foundation pit top water interception and safety protection measures |
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| Publication Number | Publication Date |
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| CN113463647A true CN113463647A (en) | 2021-10-01 |
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| CN202110654981.1A Pending CN113463647A (en) | 2021-06-11 | 2021-06-11 | Construction method for steel sheet pile support serving as foundation pit top water interception and safety protection measures |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115450238A (en) * | 2022-10-12 | 2022-12-09 | 中建八局西北建设有限公司 | Steel sheet pile easy to pull out and construction method thereof |
-
2021
- 2021-06-11 CN CN202110654981.1A patent/CN113463647A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115450238A (en) * | 2022-10-12 | 2022-12-09 | 中建八局西北建设有限公司 | Steel sheet pile easy to pull out and construction method thereof |
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