CN106869129A - A kind of mud replaces the construction method of open caisson - Google Patents
A kind of mud replaces the construction method of open caisson Download PDFInfo
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- CN106869129A CN106869129A CN201710256826.8A CN201710256826A CN106869129A CN 106869129 A CN106869129 A CN 106869129A CN 201710256826 A CN201710256826 A CN 201710256826A CN 106869129 A CN106869129 A CN 106869129A
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- well
- prefabricated
- slurry
- shaft bottom
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- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Underground Or Underwater Handling Of Building Materials (AREA)
Abstract
The invention discloses the construction method that a kind of mud replaces open caisson, comprise the following steps：A, well body segmentation are prefabricated；B, the pit for placing prefabricated well section is opened up on well location ground, and prefabricated well section is placed in pit；Injection bentonite slurry in C, past well；D, blown using air compressor and stir shaft bottom bentonite slurry, the soil body in well is mixed into slurry with bentonite slurry, so that prefabricated well section is constantly settled；E, the mixed slurry in shaft bottom is pumped to outside silt separation equipment, and by separation after low particle diameter slurry be back in well；Prefabricated well section, and repeat step C to E are stacked in F, prefabricated well section in step D, so as to increase well section；G, after well body sinks down into predetermined elevation, in shaft bottom, some square piles are set；H, shaft bottom pouring concrete back cover, complete construction.Construction method of the invention is simple, and technical requirements are low, and easily realizes.
Description
【Technical field】
The present invention relates to the construction method that a kind of mud replaces open caisson, belong to the realm of building construction.
【Background technology】
Frequently encounter the region of unfavorable geology and building dense in sewage conduct construction, in order to reduce to existing road and
The influence of surrounding building typically uses non-excavating construction, but the construction of its inspection shaft or technique structures is unavoidable to periphery
Produce influence, constructional difficulties.
The construction method of inspection shaft or structures under unfavorable geological condition have supporting excavation, supporting it is inverse do, supporting open caisson,
Band water open caisson etc., method for protecting support is using steel sheet pile, cement mixing pile or high-pressure rotary jet grouting pile etc..Steel sheet pile supporting has violent shake
Dynamic, cement mixing pile or high-pressure rotary jet grouting pile are difficult to shape in drift sand geology slip casting, and number of dropouts is big, and water-stagnating effect is bad.Even if adopting
With band water open caisson, when being cut the earth in well, can also make well external and internal pressure uneven, cause the outer soil erosion of well.These forms of construction work
On be all difficult to avoid that disturbance to surrounding soil, sinking of ground even house crack is produced, so as to cause claim, and at some
The limited place in space is difficult to supporting construction by existing method.
The shortcoming of prior art is summarized as follows：
1st, construct complicated, technical requirements are high, it is difficult to realize；
2nd, supporting grouting amount is big, and construction cost is high；
3rd, space requirement needed for constructing is high；
4th, in band water fetching water, because the density of water is less than mud or soil body density, band water open caisson is inside and outside still to deposit pressure
Power is poor, and sand running-down is had outside well；
5th, it is big to surrounding soil disturbance, secondary disaster is also easy to produce, cause surface subsidence, neighbouring house crack；
6th, execution conditions are poor, big to surrounding environment influence；
7th, machine is hooked low with water excavation and construction efficiency, greatly, effective progress is slow for overall construction work amount；
8th, well body and soil contact resistance are uneven, easy run-off the straight.
The present invention is namely based on problem above generation.
【The content of the invention】
The purpose of the present invention is directed to the deficiencies in the prior art, proposes that a kind of mud replaces the construction method of open caisson, solves
Unfavorable geology and the well body construction problem in building dense region, reduces cost improve efficiency, reduce secondary disaster.
In order to solve the above technical problems, the present invention provides following technical scheme：A kind of mud replaces the construction method of open caisson,
It is characterised in that it includes following steps：
A, well body segmentation are prefabricated；
B, the pit for placing prefabricated well section is opened up on well location ground, and prefabricated well section is placed in pit；
Injection bentonite slurry in C, past well；
D, blown using air compressor and stir shaft bottom bentonite slurry, the soil body in well is mixed into slurry with bentonite slurry, from
And prefabricated well section is constantly settled；
E, the mixed slurry in shaft bottom is pumped to outside silt separation equipment, and by separation after low particle diameter slurry be back to well
It is interior；
Prefabricated well section, and repeat step C to E are stacked in F, prefabricated well section in step D, so as to increase well section；
G, after well body sinks down into predetermined elevation, in shaft bottom, some square piles are set；
H, shaft bottom pouring concrete back cover, complete construction.
A kind of mud as described above replaces the construction method of open caisson, it is characterised in that in step C to E, keeps in well
Liquid level maintains an equal level with the outer ground of well.
A kind of mud as described above replaces the construction method of open caisson, it is characterised in that in step D, using air pressure
Contracting machine is blown by hard air hose and stirs shaft bottom bentonite slurry.
A kind of mud as described above replaces the construction method of open caisson, it is characterised in that in step E, by being arranged on
Mud pumping in well is starched to outside silt particle separation equipment.
Compared with prior art, a kind of mud of the invention replaces the construction method of open caisson, has the advantages that：
1st, construction method of the invention is simple, and technical requirements are low, and easily realizes.
2nd, bentonite slurry density of the invention and soil body density are close, make well internal and external pressure balance, on outside without influence,
Secondary disaster will not be produced, ground does not settle, and house does not ftracture；It is with low cost, it is not necessary to supporting, it is not necessary to earth excavation.
3rd, bentonite slurry plays lubrication, easily sinks, periphery uniform force, is difficult to incline, and make sand suspend
Wherein, it is easy to suction,
4th, the dry body refuse outward transport after the present invention is by separation, environmental condition is good, pollution-free, influences small to surrounding enviroment.
5th, efficiency of construction of the present invention is high, and outward transport body refuse amount is small, and progress is fast.
【Brief description of the drawings】
Specific embodiment of the invention is described in further detail below in conjunction with the accompanying drawings, wherein：
Fig. 1 is construction drawing of the invention.
Fig. 2 is the caisson structure figure that present invention construction is completed；
Brief description of the drawings：1st, prefabricated well section；2nd, air compressor；3rd, outside silt separation equipment；4th, slush pump；5th, pit；
6th, square pile；7th, bentonite slurry；8th, the soil body.
【Specific embodiment】
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described.
As depicted in figs. 1 and 2, a kind of mud replaces the construction method of open caisson, comprises the following steps：
A, well body segmentation are prefabricated；
It is well body is integral prefabricated or be segmented prefabricated according to well body depth and perforate needs；Open caisson of the invention can be used for
Inspection shaft, switching well, received well, active well of sewage conduct non-excavating construction etc. are done, so will be in the reinforcing bar colligation of well body
When reserved hole position, open caisson construction is easy in concrete prefabricated hole of not boxing out when pouring；After the completion of open caisson construction, situation can be starched in band
Lower no-dig technique gets through perforate after preformed hole, or clean plasm.
B, opened up for placing the pit 5 of prefabricated well section 1 on well location ground, and prefabricated well section 1 is placed in pit 5；
Injection bentonite slurry 7 in C, past well；Bentonite slurry density is approached with soil body density, puts down well external and internal pressure
Weighing apparatus, makes well internal and external pressure balance, on outside without influence, will not produce secondary disaster, and ground does not settle.
D, blown using air compressor 2 and stir shaft bottom bentonite slurry 7, the soil body 8 in well is mixed into bentonite slurry 7
Slurry, so that prefabricated well section 1 is constantly settled；Construction is simple, and technical requirements are low.
E, the mixed slurry in shaft bottom is pumped to outside silt separation equipment 3, and by separation after low particle diameter slurry be back to
In well；In addition by separation after big particle diameter sand packing outward transport, on surrounding enviroment influence it is small.
Prefabricated well section, and repeat step C to E are stacked in F, the prefabricated well section 1 in step E, so as to increase well section；
G, after well body sinks down into predetermined elevation, in shaft bottom, some square piles 6 are set；
H, shaft bottom pouring concrete back cover, complete construction.
Finally well entoplasm is evacuated, mud can be used for the construction of next well.
As depicted in figs. 1 and 2, in the present embodiment, in step C to E, liquid level in well is kept to maintain an equal level with the outer ground of well,
Make well internal and external pressure balance, on outside without influence, secondary disaster will not be produced, ground does not settle.
As depicted in figs. 1 and 2, in the present embodiment, in step D, blown by hard air hose using air compressor 2
Stir shaft bottom bentonite slurry.
As depicted in figs. 1 and 2, in the present embodiment, in step E, slurry is aspirated extremely by the slush pump 4 being arranged in well
Outside silt separation equipment 3.
As depicted in figs. 1 and 2, in the present embodiment, in step G, square pile 6 is arranged in shaft bottom；Square pile specification and arrangement
It is not especially limited herein.
Claims (4)
1. a kind of mud replaces the construction method of open caisson, it is characterised in that comprise the following steps：
A, well body segmentation are prefabricated；
B, the pit (5) for placing prefabricated well section (1) is opened up on well location ground, and prefabricated well section (1) is placed on pit (5)
It is interior；
Injection bentonite slurry (7) in C, past well；
D, blown using air compressor (2) and stir shaft bottom bentonite slurry (7), the soil body in well (8) is mixed with bentonite slurry (7)
Into slurry, so that prefabricated well section (1) is constantly settled；
E, the mixed slurry in shaft bottom is pumped to outside silt separation equipment (3), and by separation after low particle diameter slurry be back to well
It is interior；
Prefabricated well section, and repeat step C to E are stacked in F, prefabricated well section (1) in step D, so as to increase well section；
G, after well body sinks down into predetermined elevation, in shaft bottom, some square piles (6) are set；
H, shaft bottom pouring concrete back cover, complete construction.
2. a kind of mud according to claim 1 replaces the construction method of open caisson, it is characterised in that in step C to E,
Liquid level in well is kept to maintain an equal level with the outer ground of well.
3. a kind of mud according to claim 1 replaces the construction method of open caisson, it is characterised in that in step D, utilizes
Air compressor (2) is blown by hard air hose and stirs shaft bottom bentonite slurry.
4. a kind of mud according to claim 1 replaces the construction method of open caisson, it is characterised in that in step E, pass through
Slush pump (4) suction being arranged in well is starched to outside silt particle separation equipment (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710256826.8A CN106869129A (en) | 2017-04-19 | 2017-04-19 | A kind of mud replaces the construction method of open caisson |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710256826.8A CN106869129A (en) | 2017-04-19 | 2017-04-19 | A kind of mud replaces the construction method of open caisson |
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| Publication Number | Publication Date |
|---|---|
| CN106869129A true CN106869129A (en) | 2017-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710256826.8A Pending CN106869129A (en) | 2017-04-19 | 2017-04-19 | A kind of mud replaces the construction method of open caisson |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108425362A (en) * | 2018-02-01 | 2018-08-21 | 中建三局集团有限公司 | A kind of earthwork transportation system and construction method for base pit engineering |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3595905B2 (en) * | 2002-03-04 | 2004-12-02 | 大成建設株式会社 | Underwater sand covering device and sand covering method |
| CN104975612A (en) * | 2015-06-23 | 2015-10-14 | 连卫东 | Novel water open caisson construction technology |
| CN106480897A (en) * | 2015-08-31 | 2017-03-08 | 陈飞 | Large-scale well-sinking sinking construction method |
-
2017
- 2017-04-19 CN CN201710256826.8A patent/CN106869129A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3595905B2 (en) * | 2002-03-04 | 2004-12-02 | 大成建設株式会社 | Underwater sand covering device and sand covering method |
| CN104975612A (en) * | 2015-06-23 | 2015-10-14 | 连卫东 | Novel water open caisson construction technology |
| CN106480897A (en) * | 2015-08-31 | 2017-03-08 | 陈飞 | Large-scale well-sinking sinking construction method |
Non-Patent Citations (1)
| Title |
|---|
| 筑龙网组编: "《隧道与地下工程施工技术案例精选》", 30 April 2009, 中国电力出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108425362A (en) * | 2018-02-01 | 2018-08-21 | 中建三局集团有限公司 | A kind of earthwork transportation system and construction method for base pit engineering |
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| CB03 | Change of inventor or designer information |
Inventor after: Guo Kun Inventor after: Li Qijun Inventor after: Chen Bin Inventor after: Zhang Wei Inventor after: Yang Wei Inventor before: Guo Kun Inventor before: Li Qijun Inventor before: Chen Bin Inventor before: Zhang Wei Inventor before: Yang Wei |
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Application publication date: 20170620 |
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