CN101560770B - Novel deep building foundation pit supporting system - Google Patents

Novel deep building foundation pit supporting system Download PDF

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Publication number
CN101560770B
CN101560770B CN200810027548XA CN200810027548A CN101560770B CN 101560770 B CN101560770 B CN 101560770B CN 200810027548X A CN200810027548X A CN 200810027548XA CN 200810027548 A CN200810027548 A CN 200810027548A CN 101560770 B CN101560770 B CN 101560770B
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CN
China
Prior art keywords
campshed
foundation pit
line
water
piles
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN200810027548XA
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Chinese (zh)
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CN101560770A (en
Inventor
李奇逊
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Guangdong Sitong Group Co Ltd
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Guangdong Sitong Group Co Ltd
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Priority to CN200810027548XA priority Critical patent/CN101560770B/en
Publication of CN101560770A publication Critical patent/CN101560770A/en
Application granted granted Critical
Publication of CN101560770B publication Critical patent/CN101560770B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The invention discloses a deep building foundation pit supporting system which comprises front-line piles, a water-retaining curtain, a top beam, rear-line piles, an anchor rope and sand pulp, the front-line piles are positioned at the side of a building foundation pit, the water-retaining curtain is tightly abutted against the inner sides of the front-line pile, the rear-line piles are positioned in soil body at the inner side of the water-retaining curtain, the tops of the front-line piles and the rear-line piles are provided with the top beam integrally poured by reinforced concrete, wherein the top beam is provided with a protruding part towards the inner side at the top of the rear-line piles and is provided with the vertical anchor rope in the soil body at the inner side of the rear-line piles, the lower end of the anchor rope vertically extends into rock body and the sand pulp is poured into the rock body for concretion, and the upper end of the anchor rope is tightened with and is concreted with the protruding part of the top beam. Because the vertical anchor rope is arranged in the soil body at the inner side of the rear-line piles and the drilling in the soil body is fast and good, the invention greatly improves the speed, increases the construction efficiency, saves the time, reduces the loss of a drill bit, lowers the construction cost, and achieves better profit.

Description

A kind of deep building foundation pit supporting system
Technical field
The present invention relates to the building foundation technical field, particularly adopt the deep foundation pit of construction support technology of the vertical anchor cable of double-row pile.
Background technology
Along with the development of urban construction, highrise building increases gradually, and the city building is intensive day by day.Because the requirement of the function of use and the exploitation underground space, highrise building generally all design the basement of the big planar dimension and the degree of depth.The exploitation of the underground space relates to the safety of deep building foundation pit, and this is particularly important to the building dense area that is located on the soft foundation.
In weak soil bed thickness, area that groundwater table is high, the foundation ditch neighboring buildings is intensive, contiguous urban road, wagon flow, visitors flowrate are big, and under the condition of city planting ductwork complexity, stability of slope when how to guarantee excavation of foundation pit, surrounding enviroment safety, normal live and work order are unaffected, are the great technical barriers that engineering construction stands in the breach.How to protect surrounding enviroment and excavation safety because of ground system a surname, the preferred pattern foundation pit supporting structure scheme in the ground of suiting measures to differing conditions in terms of time directly relate to, be the cardinal task of engineering construction.
Foundation ditch has multiple support system, and definite principle is under the prerequisite that guarantees foundation ditch safety and surrounding enviroment safety, considers preferred from combined factors such as duration, expenses.
The support system that the deep building foundation pit in weak soil high water level area adopts usually has: pile-anchor system, campshed inner supporting body are and the diaphragm wall system, and take measures such as precipitation or water-stop curtain according to groundwater condition.Pile-anchor system is subjected to the restriction of building line and adjacent building underground structure.For excavation plane big deep building foundation pit, campshed inner supporting body system need be provided with baroque inner supporting body system, carries out because of interior support must intersect with excavation, and is not only long in time limit, expense is high, and the earth moving face is also had certain influence; Diaphragm wall also exist need be provided with interior support, long in time limit, expense is high, influence the problem of excavated surface.
Past attempts has the minority engineering to adopt double castinplace pile to add the support system of water-stop curtain, double bored pile is by 2.0m or bigger array pitch design, the stake top is provided with Guan Liang (Guan Liang longitudinally and between two campsheds is provided with), press portal-rigid frames and consider, other establishes cement earth pile (deep-mixed pile or churning, pendulum spray stake) and does water-stop curtain.Because of the support retaining height generally about 6.5m, computation schema is with actual that situation is set is variant, so all in various degree certain errors of existence of the engineering that adopts this support system, effect is not ideal enough, therefore this support system is not applied.
The paper " intensive building area weak soil deep foundation pit support design and construction " that " Building technology exploitation " the 30th the 3rd phase of rolling up of publishing in March, 2003 was once published the Li Qixun of our company etc. has disclosed " the vertical cable bolting of cantilevered double-row pile one prestressing force " technology, it adopts double bored pile, and campshed adds the vertical anchor cable of prestressing force in the back.It must pass through at this by anchor cable by the subdrilling through hole, and then carry out next step perfusion mortar on the campshed of back.Because the back campshed is a cast-in-place concrete pile, boring is thereon wasted time and energy, and tool loss is big especially, brings very inconvenience to construction.
Summary of the invention
The present invention is a kind of deep building foundation pit supporting system, and technical problem to be solved is to avoid holing on campshed behind the concrete spouting, improves efficiency of construction, saves time, reduces the loss of drill bit, reduces construction cost.
Technical scheme of the present invention is: a kind of deep building foundation pit supporting system, comprise preceding campshed, water-stop curtain, Guan Liang, back campshed, anchor cable, mortar, preceding campshed is positioned at the building foundation pit side, water-stop curtain is near the inboard of preceding campshed, back campshed is arranged in the soil body of water-stop curtain inboard, at preceding campshed, back campshed top is provided with steel concrete builds all-in-one-piece Guan Liang, wherein: described Guan Liang is provided with projection to the inside at campshed top, back, in the soil body of campshed inboard, back, be provided with vertical anchor cable, this anchor cable lower end vertically stretch in the rock mass and perfusion mortar fixed, the upper end also is consolidated with hat beam projection tensioning.
Because the present invention is provided with vertical anchor cable in the soil body of campshed inboard, back, in the soil body boring faster and better, improved speed greatly, improved efficiency of construction, saved the time, reduced the loss of drill bit, reduced construction cost, obtain good benefit.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing:
Fig. 1 is the horizontal layout schematic diagram that the present invention forms;
Fig. 2 is the A-A sectional view on Fig. 1.
The specific embodiment
Among the figure, preceding campshed 4, water-stop curtain 5, hat beam 6, back campshed 7, anchor cable 8, mortar 9, preceding campshed 4 is positioned at building foundation pit 3 sides, water-stop curtain 5 is near the inboard of preceding campshed 4, back campshed 7 is arranged in the soil body 2 of water-stop curtain 5 inboards, at preceding campshed 4, back campshed 7 tops are provided with steel concrete and build all-in-one-piece hat beam 6, wherein: described hat beam 6 is provided with projection 61 to the inside at campshed 7 tops, back, in the soil body 2 of campshed 7 inboards, back, be provided with vertical anchor cable 8, these anchor cable 8 lower ends vertically stretch in the rock mass 1 and perfusion mortar 9 fixed, the upper end also is consolidated with hat beam 6 projections, 61 tensionings.
Like this, during construction, make preformed hole 62 at projection 61 places of hat beam 6 earlier, in the soil body 2, vertically hole to rock mass 1 facing to this preformed hole 62, then anchor cable 8 lower ends are seen through projection 61 place's preformed holes 62 of hat beam 6, vertically stretch into hole in, perfusion mortar 9, treat mortar 9 with anchor cable 8 and rock mass 1 fixed after, with projection 61 tensionings of anchor cable 8 upper ends and hat beam 6 and fixed.

Claims (1)

1. deep building foundation pit supporting system, comprise preceding campshed, water-stop curtain, Guan Liang, back campshed, anchor cable, mortar, preceding campshed is positioned at the building foundation pit side, water-stop curtain is near the inboard of preceding campshed, back campshed is arranged in the soil body of water-stop curtain inboard, at preceding campshed, back campshed top is provided with steel concrete builds all-in-one-piece Guan Liang, it is characterized in that: described Guan Liang is provided with projection to the inside at campshed top, back, in the soil body of campshed inboard, back, be provided with vertical anchor cable, this anchor cable lower end vertically stretch in the rock mass and perfusion mortar fixed, the upper end also is consolidated with hat beam projection tensioning.
CN200810027548XA 2008-04-15 2008-04-15 Novel deep building foundation pit supporting system Expired - Fee Related CN101560770B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200810027548XA CN101560770B (en) 2008-04-15 2008-04-15 Novel deep building foundation pit supporting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200810027548XA CN101560770B (en) 2008-04-15 2008-04-15 Novel deep building foundation pit supporting system

Publications (2)

Publication Number Publication Date
CN101560770A CN101560770A (en) 2009-10-21
CN101560770B true CN101560770B (en) 2011-05-25

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Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101775807B (en) * 2010-03-03 2011-09-21 天津二十冶建设有限公司 Structure for supporting deep foundation pit of soft soil foundation
CN102605792B (en) * 2012-03-16 2014-04-02 浙江理工大学 Multi-row mini-pile enclosing structure for blocking soil and construction process
CN102644286B (en) * 2012-04-10 2015-06-24 广东天竟建设有限公司 Deep foundation pit supporting structure
CN104060614B (en) * 2013-03-20 2016-03-30 中国二十冶集团有限公司 A kind of soldier pile construction method of first building Guan Liang
CN103195069B (en) * 2013-04-01 2016-01-20 北京工业大学 Pre-stress type double-row pile strong constraint method for supporting deep foundation pit
CN103306289B (en) * 2013-06-28 2015-04-22 中国三冶集团有限公司 Foundation pit piled anchor dado concrete anchor cable top beam structure and construction method thereof
CN103469803A (en) * 2013-09-30 2013-12-25 中国建筑股份有限公司 Pile beam vertical anchor support system used for supporting foundation pit and construction method of pile beam vertical anchor support system
CN103543025A (en) * 2013-10-21 2014-01-29 广东省六建集团有限公司 Method for testing tall concrete formwork supporting system
CN103590408B (en) * 2013-11-25 2016-06-15 中国建筑股份有限公司 The perpendicular anchor support system of a kind of double-row pile beam and constructional method thereof
CN104846832A (en) * 2015-06-03 2015-08-19 中船第九设计研究院工程有限公司 Construction method of circular deep foundation pit enclosure of discrete pile support
CN106320345A (en) * 2015-06-30 2017-01-11 上海勘测设计研究院有限公司 Foundation pit support structure
CN109162284A (en) * 2018-10-31 2019-01-08 中国十九冶集团有限公司 A kind of seashore beach ground underground structure deep foundation pit support and its construction method
CN110512620A (en) * 2019-07-30 2019-11-29 中铁大桥局集团有限公司 Embankment slope excavating area protection structure and construction method

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CN1277293A (en) * 2000-07-07 2000-12-20 蔡昌斌 Support structure and construction process of foundation pit
CN2457209Y (en) * 2001-01-09 2001-10-31 李象范 Prestress anchor rod compensation gravity type building enclosure
CN1338543A (en) * 2001-09-29 2002-03-06 梁炯均 Anchor-tube guniting support of frame and its construction method
JP2007247308A (en) * 2006-03-17 2007-09-27 Takenaka Komuten Co Ltd Pulling-out bearing strength reinforcing for pile group comprised of inclined piles and structure constructed according to the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1277293A (en) * 2000-07-07 2000-12-20 蔡昌斌 Support structure and construction process of foundation pit
CN2457209Y (en) * 2001-01-09 2001-10-31 李象范 Prestress anchor rod compensation gravity type building enclosure
CN1338543A (en) * 2001-09-29 2002-03-06 梁炯均 Anchor-tube guniting support of frame and its construction method
JP2007247308A (en) * 2006-03-17 2007-09-27 Takenaka Komuten Co Ltd Pulling-out bearing strength reinforcing for pile group comprised of inclined piles and structure constructed according to the same

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