CN107938678A - A kind of subway foundation pit underwater excavation method - Google Patents
A kind of subway foundation pit underwater excavation method Download PDFInfo
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- CN107938678A CN107938678A CN201710928276.XA CN201710928276A CN107938678A CN 107938678 A CN107938678 A CN 107938678A CN 201710928276 A CN201710928276 A CN 201710928276A CN 107938678 A CN107938678 A CN 107938678A
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- foundation pit
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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
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
This application involves a kind of subway foundation pit underwater excavation method, it comprises the following steps, and more than (1) water level line excavates；(2) drainage below water level line excavates；(3) underwater excavation mobile platform is built, carries out underwater excavation；(4) underwater casting platform is built, carries out concrete sealing bottom.A kind of subway station foundation ditch excavation method described herein; Deep Foundation Pit of Metro Stations underwater excavation and underwater concrete back cover technique are not only with the obvious advantage in terms of duration and cost saving; and can effectively protect the groundwater resources of preciousness and ensure the normal life of nearby residents, realize environmental protection and security requirement.
Description
Technical field
This application involves a kind of subway foundation pit underwater excavation method.
Background technology
In the prior art, foundation pit is the soil excavated in basic engineering position by substrate absolute altitude and basic plane size
Hole.Excavation plan with reference to live nearby buildings situation, should be determined, and perform waterproof row according to geology hydrological data before excavation
Water conservancy project is made.Excavate not deep person and can use the method for putting side slope, make Stability of Earth Slopes, its gradient size is determined by related construction regulation.Open
The relatively deep and neighbouring person that has building is dug, can use foundation pit walls method for protecting support, gunite concrete wall protecting method, Large Foundation Pit even use
The methods of diaphram wall and chain colonnade formula cast-in-situ bored pile, protection outside soil layer collapse into；No influencer is nearby built, can
With well-point method lowering of watertable, using slope open cut；Natural cold air freezing process excavation etc. can be used in cold district.
The content of the invention
The technical problems to be solved by the invention are to overcome the deficiencies of the prior art and provide a kind of subway foundation pit underwater excavation
Method.
To solve above technical problem, the present invention adopts the following technical scheme that：
A kind of subway station foundation ditch excavation method, it comprises the following steps, and more than (1) water level line excavates；(2) below water level line
Drainage excavate；(3) underwater excavation mobile platform is built, carries out underwater excavation；(4) underwater casting platform is built, carries out coagulation
Grave bottom.
Preferably, step (1) specifically, foundation pit enclosure structure diaphram wall and divide Cang Qiang construction complete, carry out foundation pit
Water level line above earth excavation, is excavated to level of ground water line position.
Preferably, step (2) is specifically, set interim catch pit in foundation pit, and catchment bright row, and excavator coordinates gravity type to grab
Bucket vertically transports the soil body after drainage.
Preferably, for step (3) specifically, after the completion of foundation pit drainage excavates, water level recharge is high-order to phreatic line table
When putting, underwater excavation mobile platform is built, carries out underwater excavation, and foundation pit is cleared up.
Preferably, include in the foundation pit cleaning of step (3) to waist rail, the concrete support lower part soil body and shearing groove cleaning,
Later stage is cleared up by diver's cooperative mechanical.
Preferably, the foundation pit in step (3) is cleared up specifically, when under excavating to waist rail hypomere waterline, stops excavating, by
Diver supports the downside soil body using High Pressure Gun cleaning waist rail and plate, and cooperation is grabbed except cleaning thing, when transverse plane on excavation to shearing groove
When, stop excavating, grabbed by diver using the remaining soil body of High Pressure Gun cleaning waist rail and plate support downside, cooperation except cleaning thing.
Preferably, further included in the foundation pit cleaning of step (3), building enclosure wall in the range of underwater concreting,
Cobble and satholith at inner corner trim are rushed, inhaled under water by diver, are cleared up with excavation progress, water under diver's dressing, operation
Air compressor carries out inner corner trim processing, and cobble and residue water suction are standby to be removed in grab bucket operation into storehouse, by diving under water after removing
The lower water of member use steel brush operation, and the formula of arranging brushes the viscous thing for clearing up building enclosure wall, and the inspection after being brushed, Yi Houzai
Rinsed with giant, it is ensured that wall cleans in place, does not stay attachment.
Preferably, further included in the foundation pit cleaning of step (3), when excavating under shearing groove, stop excavating, by diver
Lower water, cleaning shearing groove, and check the cleaning effect of shearing groove.
Preferably, diver is to shearing the cleaning of groove specifically, water, hand strap drill rod are dived to shearing groove portion under diver's dressing
Position.Diver, which feels, determines mouth under shearing groove, and drill rod is cocked upwards from the insertion of lower mouth, filling foam is damaged and takes off
Open.Then prized with hand or drill rod, untill foam is cleaned out.After shearing groove foam cleans out, diver slips into water
Under, cement mortar is removed with underwater air pressure gun the cleaning effect for totally, feeling and checking shearing groove.After, contact water surface work
Platform personnel, floating water outlet.
Preferably, further included in the foundation pit cleaning of step (3), cleaning leveling, cleaning ground-connecting-wall side are carried out to bottom of foundation ditch
Wall, after completing above-mentioned underwater operation, diver only starches horizontal plane following wall cleaning situation, wall iron sheet cutting situation, cuts
Cleaning situation carries out underwater self-test in power groove notch, self-test and after confirming that above-mentioned operation meets the requirements, diver coordinate under water into
The cleaning leveling of row bottom of foundation ditch.Before foundation pit back cover, due to grabbing bucket, when capturing bottom of foundation ditch, caused male and fomale(M＆F) must be by diving
Water person implements screed operation under water, after leveling, after the silt that base plane produces is native, including cleaning is rinsed below wall horizontal plane
Sediment, it is clean to pull out suction with Special diving slush pump.
Due to the use of above technical scheme, the present invention has the following advantages that compared with prior art：
A kind of subway station foundation ditch excavation method described herein, Deep Foundation Pit of Metro Stations underwater excavation and underwater concrete
Back cover technique is not only with the obvious advantage in terms of duration and cost saving, and can effectively protect the groundwater resources of preciousness and guarantee
The normal life of nearby residents, realizes environmental protection and security requirement.
Embodiment
The present invention is described in further details below in conjunction with specific embodiment.It is to be understood that these embodiments are to be used to say
The bright basic principles, principal features and advantages of the present invention, and the present invention limits from the scope of following embodiments.Adopted in embodiment
Implementation condition can do further adjustment according to specific requirement, and the implementation condition being not specified is usually the bar in normal experiment
Part.
A kind of subway station foundation ditch excavation method, it comprises the following steps, and more than (1) water level line excavates；Foundation pit enclosure structure
Diaphram wall and divide Cang Qiang construction complete, carry out Water Level in Foundation Pit line above earth excavation, be excavated to level of ground water line position.
(2) drainage below water level line excavates；Interim catch pit is set in foundation pit, and catchment bright row, and excavator coordinates gravity type grab bucket will
The soil body after drainage vertically transports.(3) underwater excavation mobile platform is built, carries out underwater excavation；Completed when foundation pit drainage excavates
Afterwards, during high to the phreatic line table position of water level recharge, underwater excavation mobile platform is built, carries out underwater excavation, and to foundation pit
Cleared up.(4) underwater casting platform is built, carries out concrete sealing bottom.
Include in the foundation pit cleaning of step (3) to waist rail, the concrete support lower part soil body and shearing groove cleaning, the later stage is by diving
Water person's cooperative mechanical is cleared up.When under excavating to waist rail hypomere waterline, stop excavating, cleared up by diver using High Pressure Gun
Waist rail and the plate support downside soil body, cooperation are grabbed except cleaning thing, when excavating to transverse plane on shearing groove, stop excavating, by diver
The remaining soil body of waist rail and plate support downside is cleared up using High Pressure Gun, cooperation is grabbed except cleaning thing.Enclosing in the range of underwater concreting
Cobble and satholith at protection structure wall, inner corner trim are rushed, inhaled under water by diver, are cleared up with excavation progress, diver
Water is loaded, operation air compressor carries out inner corner trim processing, and cobble and residue water suction are standby to be removed in grab bucket operation into storehouse,
Steel brush operation is used by water under diver after removing, the formula of arranging brushes the viscous thing of cleaning building enclosure wall, and after being brushed
Inspection, rinsed again with giant later, it is ensured that wall clean in place, do not stay attachment.
When excavating under shearing groove, stop excavating, by water under diver, cleaning shearing groove, and check the clear of shearing groove
Manage effect.Diver is to shearing the cleaning of groove specifically, water, hand strap drill rod are dived to shearing groove location under diver's dressing.Diving
Member, which feels, determines mouth under shearing groove, and drill rod is cocked upwards from the insertion of lower mouth, filling foam is damaged and disengages.Then use
Hand or drill rod prize, untill foam is cleaned out.After shearing groove foam cleans out, diver dives beneath the water, with underwater
Air pressure gun removes cement mortar the cleaning effect for totally, feeling and checking shearing groove.After, water surface workbench personnel are contacted,
Floating water outlet.
When cleaning leveling is carried out to bottom of foundation ditch, ground-connecting-wall side wall is cleared up, after completing above-mentioned underwater operation, diver is to water
The following wall of plane clears up situation, wall and only starches iron sheet cutting situation, shears the underwater self-test of cleaning situation progress in groove notch, from
After examining and confirming that above-mentioned operation meets the requirements, diver coordinates under water carries out bottom of foundation ditch cleaning leveling.Before foundation pit back cover, due to
Grab bucket caused male and fomale(M＆F) when capturing bottom of foundation ditch must implement screed operation under water by diver, and after leveling, bottom is put down
The silt soil that face produces, including the sediment after cleaning flushing below wall horizontal plane, it is dry to pull out suction with Special diving slush pump
Only.
A kind of subway station foundation ditch excavation method described herein, Deep Foundation Pit of Metro Stations underwater excavation and underwater concrete
Back cover technique is not only with the obvious advantage in terms of duration and cost saving, and can effectively protect the groundwater resources of preciousness and guarantee
The normal life of nearby residents, realizes environmental protection and security requirement.
The present invention is described in detail above, the explanation of embodiment be only intended to help the method for understanding the present invention and
Its core concept, its object is to allow the personage for being familiar with this field technology to understand present disclosure and implement according to this, and
It cannot be limited the scope of the invention with this.Any equivalent change or modification in accordance with the spirit of the invention, should all contain
Cover within protection scope of the present invention.
Claims (10)
- A kind of 1. subway foundation pit underwater excavation method, it is characterised in that：It comprises the following steps,(1) more than water level line excavate；(2) drainage below water level line excavates；(3) underwater excavation mobile platform is built, carries out water Lower excavation；(4) underwater casting platform is built, carries out concrete sealing bottom.
- A kind of 2. subway foundation pit underwater excavation method according to claim 1, it is characterised in that：Step (1) is specifically, base Pit enclosure structure diaphram wall and divide Cang Qiang construction complete, carry out Water Level in Foundation Pit line above earth excavation, be excavated to underground water Bit line position.
- A kind of 3. subway foundation pit underwater excavation method according to claim 1, it is characterised in that：Step (2) is specifically, base Interim catch pit is set in hole, and catchment bright row, and excavator coordinates gravity type grab bucket vertically to transport the soil body after drainage.
- A kind of 4. subway foundation pit underwater excavation method according to claim 1, it is characterised in that：Step (3) is specifically, work as After the completion of foundation pit drainage excavates, during high to the phreatic line table position of water level recharge, underwater excavation mobile platform is built, carries out water Lower excavation, and foundation pit is cleared up.
- A kind of 5. subway foundation pit underwater excavation method according to claim 4, it is characterised in that：Foundation pit in step (3) Cleaning includes clearing up waist rail, the concrete support lower part soil body and shearing groove cleaning, later stage by diver's cooperative mechanical.
- A kind of 6. subway foundation pit underwater excavation method according to claim 5, it is characterised in that：Foundation pit in step (3) Cleaning stops excavating specifically, when under excavating to waist rail hypomere waterline, and High Pressure Gun cleaning waist rail and plate support are used by diver The downside soil body, cooperation are grabbed except cleaning thing, when excavating to transverse plane on shearing groove, stop excavating, High Pressure Gun is used by diver The remaining soil body of waist rail and plate support downside is cleared up, cooperation is grabbed except cleaning thing.
- A kind of 7. subway foundation pit underwater excavation method according to claim 6, it is characterised in that：Foundation pit in step (3) Cleaning further includes, and the cobble at building enclosure wall, inner corner trim and satholith in the range of underwater concreting are by diver's water Undershoot, suction, are cleared up with excavation progress, water under diver's dressing, and operation air compressor carries out inner corner trim processing, cobble and residual Thing water suction is stayed into storehouse, it is standby to be removed in grab bucket operation, steel brush operation is used by water under diver after removing, the formula of arranging brushes clearly The viscous thing of building enclosure wall, and the inspection after being brushed are managed, is rinsed again with giant later, it is ensured that wall cleaning is arrived Position, does not stay attachment.
- A kind of 8. subway foundation pit underwater excavation method according to claim 6, it is characterised in that：Foundation pit in step (3) Cleaning further includes, and when excavating under shearing groove, stops excavating, and by water under diver, cleaning shearing groove, and checks shearing groove Cleaning effect.
- A kind of 9. subway foundation pit underwater excavation method according to claim 6, it is characterised in that：Diver is to shearing groove Cleaning is specifically, water, hand strap drill rod are dived to shearing groove location under diver's dressing.Diver, which feels, determines mouth under shearing groove, Drill rod is cocked upwards from the insertion of lower mouth, filling foam is damaged and disengages.Then prized with hand or drill rod, until foam is clear Untill reason is clean.After shearing groove foam cleans out, diver dives beneath the water, and cement mortar is removed clean, spy with underwater air pressure gun Touch and check the cleaning effect of shearing groove.After, contact water surface workbench personnel, floating water outlet.
- A kind of 10. subway foundation pit underwater excavation method according to claim 6, it is characterised in that：Foundation pit in step (3) Cleaning further includes, and cleaning leveling is carried out to bottom of foundation ditch, clears up ground-connecting-wall side wall, after completing above-mentioned underwater operation, diver couple The following wall of horizontal plane clears up situation, wall and only starches iron sheet cutting situation, shears the underwater self-test of cleaning situation progress in groove notch, Self-test and after confirming that above-mentioned operation meets the requirements, diver coordinates under water carries out bottom of foundation ditch cleaning leveling.Before foundation pit back cover, by Caused male and fomale(M＆F) must implement screed operation under water by diver when grab bucket is capturing bottom of foundation ditch, after leveling, bottom The silt soil that plane produces, including the sediment after cleaning flushing below wall horizontal plane, suction is pulled out with Special diving slush pump Totally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710928276.XA CN107938678A (en) | 2017-10-09 | 2017-10-09 | A kind of subway foundation pit underwater excavation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710928276.XA CN107938678A (en) | 2017-10-09 | 2017-10-09 | A kind of subway foundation pit underwater excavation method |
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| CN107938678A true CN107938678A (en) | 2018-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710928276.XA Pending CN107938678A (en) | 2017-10-09 | 2017-10-09 | A kind of subway foundation pit underwater excavation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029686A (en) * | 2019-04-01 | 2019-07-19 | 广州地铁设计研究院股份有限公司 | A kind of station construction method of underground station and processing water gushing in pit |
| CN115198758A (en) * | 2022-07-05 | 2022-10-18 | 中铁四局集团有限公司 | Novel method for sealing bottom of foundation pit underwater concrete |
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| CN101139838A (en) * | 2007-10-15 | 2008-03-12 | 上海市隧道工程轨道交通设计研究院 | Construction method for high artesian area ultra-deep foundation pit |
| CN103225306A (en) * | 2013-03-26 | 2013-07-31 | 西安建筑科技大学 | Method of preventing foundation pit leakage during excavation of foundation pit close to water source |
| CN107119691A (en) * | 2017-06-22 | 2017-09-01 | 中交二航局第四工程有限公司 | One kind is applied to the square deep basal pit of the high pressure-bearing of rich water sand gravel layer and its excavation method |
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2017
- 2017-10-09 CN CN201710928276.XA patent/CN107938678A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101139838A (en) * | 2007-10-15 | 2008-03-12 | 上海市隧道工程轨道交通设计研究院 | Construction method for high artesian area ultra-deep foundation pit |
| CN103225306A (en) * | 2013-03-26 | 2013-07-31 | 西安建筑科技大学 | Method of preventing foundation pit leakage during excavation of foundation pit close to water source |
| CN107119691A (en) * | 2017-06-22 | 2017-09-01 | 中交二航局第四工程有限公司 | One kind is applied to the square deep basal pit of the high pressure-bearing of rich water sand gravel layer and its excavation method |
Non-Patent Citations (2)
| Title |
|---|
| 刘仁松: "《建筑工程施工工艺》", 30 September 2002, 重庆大学出版社 * |
| 龚晓南等: "《地基处理理论与实践新进展：第八届全国地基处理学术讨论会论文集》", 31 October 2004, 合肥工业大学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029686A (en) * | 2019-04-01 | 2019-07-19 | 广州地铁设计研究院股份有限公司 | A kind of station construction method of underground station and processing water gushing in pit |
| CN115198758A (en) * | 2022-07-05 | 2022-10-18 | 中铁四局集团有限公司 | Novel method for sealing bottom of foundation pit underwater concrete |
| CN115198758B (en) * | 2022-07-05 | 2023-05-30 | 中铁四局集团有限公司 | Underwater concrete bottom sealing method for foundation pit |
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Application publication date: 20180420 |