CN204456058U - A kind of constructing structure reducing building base subsidence speed - Google Patents

A kind of constructing structure reducing building base subsidence speed Download PDF

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Publication number
CN204456058U
CN204456058U CN201520073307.4U CN201520073307U CN204456058U CN 204456058 U CN204456058 U CN 204456058U CN 201520073307 U CN201520073307 U CN 201520073307U CN 204456058 U CN204456058 U CN 204456058U
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China
Prior art keywords
pile
steel pipe
miniature steel
floor
building
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李洪波
刘富均
刘黎明
万加勤
王丽斌
丁雷
柳文涛
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Wuhan Surveying Geotechnical Research Institute Co Ltd of MCC
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Wuhan Surveying Geotechnical Research Institute Co Ltd of MCC
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Abstract

The utility model provides a kind of constructing structure reducing building base subsidence speed, comprise building floor, floor settling zone is formed at the edge on building floor, it is characterized in that: below the settling zone of floor, be laid with miniature steel pipe pile and high-pressure rotary jet grouting pile, building floor bottoms fills expansive concrete layer, reinforcing bar is equipped with in expansive concrete layer, the miniature steel pipe pile pile body extended to below expansive concrete layer is Guamishi pile body, the high-pressure rotary jet grouting pile pile body extended to below expansive concrete layer is cement soil pile, the middle part of miniature steel pipe pile and high-pressure rotary jet grouting pile is provided with the cement injection pipe extending building floor surface, technique effect of the present utility model: the utility model constructing structure easy construction, structure is simple, reduce building base subsidence speed, control differential settlement, to guarantee the safe and reliable of foundation structure.

Description

A kind of constructing structure reducing building base subsidence speed
Technical field
The utility model relates to construction foundation working field, specifically a kind of constructing structure reducing building base subsidence speed.
Background technology
Along with the fast development of building trade, underground space development is the important way of current city three-dimensional development, in recent decades, although China's Urban Underground Space Excavation building size and strength increases large, but the planning of the underground space, management and the construction of legal rules are seriously delayed, relatively complete and underground space land value system assessment technology technique study that is science rarely has finding, has become the important bottleneck of restriction urban underground space Sustainable Development and Utilization and scientific management.Chinese scholars is by studying and testing discovery, and building base subsidence analysis theories and practice remain a large amount of problem.The larger difference of theory calculate and practice result, crosses large-scale empirical coefficient etc., all makes building base subsidence calculate the difficult problem becoming building foundation theoretical research.
The sedimentation of building foundation can affect the safety of building structure, the constructing structure that can reduce building base subsidence speed also occurred on the market, but existing constructing structure constructional difficulties, and complex structure, the effect reducing building base subsidence speed is remarkable not.
Utility model content
The utility model provides a kind of constructing structure reducing building base subsidence speed according to the deficiencies in the prior art, and structure is simple, easy construction, ensure that structural safety, reaches the effect reducing building base subsidence speed.
The technical solution of the utility model: a kind of constructing structure reducing building base subsidence speed, comprise building floor, floor settling zone is formed at the edge on building floor, it is characterized in that: below the settling zone of floor, be laid with miniature steel pipe pile and high-pressure rotary jet grouting pile, building floor bottoms fills expansive concrete layer, reinforcing bar is equipped with in expansive concrete layer, the miniature steel pipe pile pile body extended to below expansive concrete layer is Guamishi pile body, the high-pressure rotary jet grouting pile pile body extended to below expansive concrete layer is cement soil pile, the middle part of miniature steel pipe pile and high-pressure rotary jet grouting pile is provided with the cement injection pipe extending building floor surface.
The periphery of described miniature steel pipe pile pile body is provided with miniature steel pipe, and miniature steel pipe is connected by outer hoop joint between any two.
The spacing of described miniature steel pipe pile and high-pressure rotary jet grouting pile is 2.5m ~ 3.8m.
The stake footpath of described high-pressure rotary jet grouting pile is 600mm, and stake is long is 30m; The stake footpath of miniature steel pipe pile is 220mm, and stake is long is 17.5 ~ 21.5m.
The diameter of described miniature steel pipe is 194mm, and wall thickness is 5mm, the long 3m of miniature steel tube coupling.
Technique effect of the present utility model: structure is simple, easy construction, ensure that structural safety, high-pressure rotary jet grouting pile is reinforced and plastic, softly in geotechnical foundation is moulded farinose argillic horizon and mud; Weak argillic horizon in miniature steel pipe pile reinforced geotechnical foundation, makes consolidated subsoil and raft plate resistance to plucking, reduces relative settlement process, finally reach and reduce building base subsidence speed, control differential settlement, to guarantee the safe and reliable of foundation structure.
Accompanying drawing explanation
Fig. 1 is the utility model flooring structure schematic diagram;
Fig. 2 is the utility model overall structure schematic diagram;
Fig. 3 is the utility model pile body structure schematic diagram;
Fig. 4 is the utility model miniature steel pipe connection diagram.
Number in the figure represents respectively: 1-building floor, 2-settling zone, 3-miniature steel pipe pile, 4-high-pressure rotary jet grouting pile, 5-reinforcing bar, 6-expansive concrete layer, 7-Guamishi pile body, 8-cement soil pile, 9-miniature steel pipe, 10-outer hoop joint, 11-cement injection pipe.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further illustrated:
As shown in Figures 1 to 4, a kind of constructing structure reducing building base subsidence speed, comprise building floor 1, floor settling zone 2 is formed at the edge on building floor 1, it is characterized in that: below floor settling zone 2, be laid with miniature steel pipe pile 3 and high-pressure rotary jet grouting pile 4, building fills expansive concrete layer 6 bottom floor 1, reinforcing bar 5 is equipped with in expansive concrete layer 6, miniature steel pipe pile 3 pile body extended to below expansive concrete layer 6 is Guamishi pile body 7, high-pressure rotary jet grouting pile 4 pile body extended to below expansive concrete layer 6 is cement soil pile 8, the middle part of miniature steel pipe pile 3 and high-pressure rotary jet grouting pile 4 is provided with the cement injection pipe 11 extending building surface, floor 1.
The periphery of described miniature steel pipe pile 3 pile body is provided with miniature steel pipe 9, and miniature steel pipe 9 is connected by outer hoop joint 10 between any two.
The spacing of described miniature steel pipe pile 3 and high-pressure rotary jet grouting pile 4 is 2.5m ~ 3.8m.
The stake footpath of described high-pressure rotary jet grouting pile 4 is 600mm, and stake is long is 30m; The stake footpath of miniature steel pipe pile 3 is 220mm, and stake is long is 17.5 ~ 21.5m.
The diameter of described miniature steel pipe 9 is 194mm, and wall thickness is 5mm, the long 3m of miniature steel tube coupling.
After the uneven sedimentation of building foundation, first lay in the stake position of the building enterprising horizontal high voltage rotary churning pile in floor and miniature steel pipe pile.High-pressure rotary jet grouting pile: hand excavation builds floor, after removing concrete and reinforcing bar, adopt diamond drilling perforate, aperture 220mm, high pressure jet grouting adopts churning single tube technique, and P.O42.5 ordinary portland cement makes curing compound, cement mixed ratio 15%-30%, grouting pressure is not less than 22Mpa, water/binder ratio 0.75.Close layer of sand 1.5m during stake end enters, stopping grey absolute altitude is at the bottom of floor.Construction end started closed pile crown after 7 days, removed laitance and remnants, repair welding floor reinforcing rib, reserved high-pressure slip-casting pipe, and the tamping of pouring C40 expansive concrete is to plate top.Concrete curing laggard horizontal high voltage slip casting in 20 days, water/binder ratio 0.9, object prevents pile body from shrinking, and slows down floor sedimentation.
Miniature steel pipe pile: adopt diamond drilling perforate, aperture 220mm, dark 17.5 ~ 21.5m, put into the steel pipe of diameter 194mm, wall thickness 5mm after pore-forming, the long 3m of steel pipe joint, adopt outer hoop welding, built-in Grouting Pipe, synchronously installs.After steel pipe is laid, injected clear water from Grouting Pipe, mud in discharge pipe, the artificial Guamishi that drops into is to the mouth of pipe, then grouting methol is to the mouth of pipe, and water/binder ratio is 0.6.Slip casting started closed pile crown after 7 days, removed laitance and remnants, repair welding floor reinforcing rib, and the tamping of pouring C40 expansive concrete is to plate top.
Embodiment: Wang Jiadun park, Wuhan project is positioned at northwest corner, king family pier CBD business district, primarily of 5 artificial mountain peaks and A, B two and half buried underground building composition, geology is mainly: silt clay layer, farinose argillic horizon are thicker, soil layer big rise and fall, bearing capacity is poor, has considerable influence to foundation settlement.Wherein B underground building structure is reinforced concrete structure, long 114m, wide 72 meters, high 12 meters, building top height to earth up 5 meters.This building foundation treating method adopts the mode of sand-gravel pile+sand-gravel cushion+piling prepressing.After building up (ater-casting is not sealed), east and west is obvious to settlement difference, affects structural safety B, and principal character is that foundation settlement speed is large, and foundation settlement region is uneven.Select to adopt the utility model emphasis to solve the excessive problem of this building settlement speed.The utility model, to ground local directed complete set, can improve foundation settlement; Construction cost is controlled, less expensive material benefit, and overall duration impact is little; Select scientific and reasonable process means, ensure reliability, meet interests in many ways; Feasibility, economy, reliability are better.
A kind of constructing structure reducing building base subsidence speed of the present utility model, structure is simple, easy construction, ensure that structural safety, and high-pressure rotary jet grouting pile is reinforced and plastic, softly in geotechnical foundation moulded farinose argillic horizon and mud; Weak argillic horizon in miniature steel pipe pile reinforced geotechnical foundation, makes consolidated subsoil and raft plate resistance to plucking, reduces relative settlement process, finally reach and reduce building base subsidence speed, control differential settlement, to guarantee the safe and reliable of foundation structure.

Claims (5)

1. one kind is reduced the constructing structure of building base subsidence speed, comprise building floor (1), floor settling zone (2) is formed at the edge of building floor (1), it is characterized in that: be laid with miniature steel pipe pile (3) and high-pressure rotary jet grouting pile (4) in floor settling zone (2) below, expansive concrete layer (6) is filled in building floor (1) bottom, reinforcing bar (5) is equipped with in expansive concrete layer (6), the pile body that miniature steel pipe pile (3) extends to expansive concrete layer (6) below is Guamishi pile body (7), the pile body that high-pressure rotary jet grouting pile (4) extends to expansive concrete layer (6) below is cement soil pile (8), the middle part of miniature steel pipe pile (3) and high-pressure rotary jet grouting pile (4) is provided with the cement injection pipe (11) extending building floor (1) surface.
2. a kind of constructing structure reducing building base subsidence speed according to claim 1, it is characterized in that: the periphery of described miniature steel pipe pile (3) pile body is provided with miniature steel pipe (9), miniature steel pipe (9) is connected by outer hoop joint (10) between any two.
3. a kind of constructing structure reducing building base subsidence speed according to claim 1, is characterized in that: the spacing of described miniature steel pipe pile (3) and high-pressure rotary jet grouting pile (4) is 2.5m ~ 3.8m.
4. a kind of constructing structure reducing building base subsidence speed according to claim 1, is characterized in that: the stake footpath of described high-pressure rotary jet grouting pile (4) is 600mm, and stake is long is 30m; The stake footpath of miniature steel pipe pile (3) is 220mm, and stake is long is 17.5 ~ 21.5m.
5. a kind of constructing structure reducing building base subsidence speed according to claim 2, is characterized in that: the diameter of described miniature steel pipe (9) is 194mm, and wall thickness is 5mm, the long 3m of miniature steel tube coupling.
CN201520073307.4U 2015-02-03 2015-02-03 A kind of constructing structure reducing building base subsidence speed Active CN204456058U (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106049410A (en) * 2016-06-16 2016-10-26 苏州杰姆斯特机械有限公司 Underground soil layer reinforcing method of building construction
CN111576466A (en) * 2020-05-26 2020-08-25 山东泉顺达装配式建筑有限公司 Pile beam foundation structure and construction method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106049410A (en) * 2016-06-16 2016-10-26 苏州杰姆斯特机械有限公司 Underground soil layer reinforcing method of building construction
CN111576466A (en) * 2020-05-26 2020-08-25 山东泉顺达装配式建筑有限公司 Pile beam foundation structure and construction method

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