CN110029674A - A kind of bracing demolition and basement construction method for deep basal pit - Google Patents

A kind of bracing demolition and basement construction method for deep basal pit Download PDF

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Publication number
CN110029674A
CN110029674A CN201910311462.8A CN201910311462A CN110029674A CN 110029674 A CN110029674 A CN 110029674A CN 201910311462 A CN201910311462 A CN 201910311462A CN 110029674 A CN110029674 A CN 110029674A
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CN
China
Prior art keywords
support
basement
steel
minus
negative
Prior art date
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.)
Pending
Application number
CN201910311462.8A
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Chinese (zh)
Inventor
缪昌华
吴碧桥
钱龙
顾信玮
刘成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIANGSU HUAJIAN CONSTRUCTION CO Ltd
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JIANGSU HUAJIAN CONSTRUCTION CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JIANGSU HUAJIAN CONSTRUCTION CO Ltd filed Critical JIANGSU HUAJIAN CONSTRUCTION CO Ltd
Priority to CN201910311462.8A priority Critical patent/CN110029674A/en
Publication of CN110029674A publication Critical patent/CN110029674A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits

Abstract

The invention discloses a kind of bracing demolition for deep basal pit and basement construction methods, its method are as follows: the engineering pile of deep basal pit is laid with completes first, pour negative Tipple Bottom plate, top plate and exterior wall, it pours short support supporting outrigger between exterior wall and support pile at minus three layers afterwards and forms support replacement, and mountain flour slag is backfilled between short support and negative Tipple Bottom plate, then remove second support.After removing second support, negative two-layer structure is poured, and carries out support replacement and the backfill of mountain flour slag, finally removes first of support, the top plate of bracing demolition after-pouring negative one layer finally backfills mountain flour slag between negative one layer exterior wall and support pile, completes basement construction.Bracing demolition also needs to carry out the support protection of the car ramp between floor.The present invention may also be ensured that unstability will not occur for outer wall of basement when annular brace is removed, guarantee outer wall of basement lateral pressure will not because of inner support system dismounting and increase, ensure that structure safety and external wall waterproof requirement.

Description

A kind of bracing demolition and basement construction method for deep basal pit
Technical field
The present invention relates to foundation pit construction field, more particularly a kind of bracing demolition and basement for deep basal pit is applied Work method.
Background technique
As the land resource of down town is more nervous, the number of plies of skyscraper is higher and higher, and the basement number of plies is also got over Come more, following foundation pit is deeper and deeper.The foundation pit periphery pipeline comparatively dense of range in business district, have electric power, telecommunications, to The pipelines such as water, combustion gas, rainwater, sewage, part pipeline is closer apart from foundation pit side, and foundation pit can only be used without more slope positions Vertical supporting, therefore the requirement for Foundation Pit Support Design and construction will be very strict, it is interior that foundation pit mainly uses support pile to add Support supporting scheme, some projects use annular brace, the safe support replacement of safe inner support and remove and will apply as deep pit monitor The emphasis factors of work.
Summary of the invention
The main purpose of the present invention is to provide a kind of bracing demolition for deep basal pit and basement construction methods, can Effectively to solve the problems in background technique.
To achieve the above object, a kind of bracing demolition and basement construction method for deep basal pit, including following step It is rapid:
Step 1: finish in foundation pit construction, basement engineering pile driving construction after the completion of, first by negative Tipple Bottom plate, minus three layers of exterior wall and Minus three layers of top plate pouring construction is completed, and then pours short support supporting beam between minus three layers of exterior wall and the support pile of deep basal pit surrounding Support replacement is formed, and carries out the backfill of mountain flour slag between support replacement and negative Tipple Bottom plate;
Step 2: after completing step 1, first removing foundation pit annular internal brace and the short support in four sides, then removes second support;
Step 3: after second supporting removal, first completing minus two layers of exterior wall, minus two layers of top plate and negative one layer external wall construction, Then short support supporting outrigger is poured between exterior wall and support pile at minus two layers and forms support replacement, and is changed in minus two layers of support replacement with minus three layers Between support backfill mountain flour slag, finally remove first support, remove complete after-pouring negative one layer top plate, and negative one layer exterior wall with Mountain flour slag is backfilled between support pile;
The dismounting of Brace in Deep Footing Groove also needs to carry out the support protection of basement car ramp, method are as follows: in car ramp Top is using Two bors d's oeuveres 18# I-steel to support, the end of the 18# I-steel and the pre-buried steel plate of car ramp two sides concrete walls It is welded and fixed, the 18# I-steel is equipped with scaffold support.
As a preferred technical solution of the present invention, the short support in four sides uses special-purpose rope saw cut side with annular internal brace Method is removed.
As a preferred technical solution of the present invention, the center line of the support replacement and the mid-depth line one of floor roof It causes.
As a preferred technical solution of the present invention, the support replacement is poured using C20 plain concrete.
As a preferred technical solution of the present invention, the support replacement needs to set up support frame under lower support replacement after the completion of pouring Body.
As a preferred technical solution of the present invention, two 18# I-steel are by being welded into Two bors d's oeuveres 18# I-shaped Steel.
As a preferred technical solution of the present invention, the lateral steel-pipe welding of the 18# I-steel and scaffold is fixed, The vertical steel pipe of the scaffold transverse direction steel pipe and scaffold is connected by fastener.
The prior art is compared, the present invention provides have it is following the utility model has the advantages that
The innovative point of the patent of invention is sufficiently to carry out support replacement with the short support between outer wall of basement and support pile, it is ensured that Unstability will not occur for outer wall of basement when annular brace is removed;The support system set up at car ramp using I-steel and steel pipe Ensure that outer wall of basement lateral pressure will not because of inner support system dismounting and increase, while also ensure structure safety, have Conducive to outside pressure transmitting, guarantees structure safety and external wall waterproof requirement, is socketed and be welded and fixed with steel pipe between per pass section steel beam, Ensure that all fashioned iron form an integrated support system, steel pipe and I-steel belong to the common circulation material in scene, set up and tear open Except process is convenient.The patent of invention is applicable to the dismounting of the deep basal pit multiple tracks inner support of business district.
Detailed description of the invention
Fig. 1 is foundation pit surrounding support pile scheme of installation of the present invention;
Fig. 2 is second supporting removal flow diagram of the present invention;
Fig. 3 is first of supporting removal flow diagram of the invention;
Fig. 4 is Two bors d's oeuveres 18# I-steel connection schematic diagram of the present invention;
In figure: 1. support piles, the short support in 2. 4 sides, 3. annular internal braces, 4. horizontal angle braces, 5. engineering piles, 6. first of support, 7. the Two supports, 8. negative Tipple Bottom plates, 9. minus three layers of exterior wall, 10. minus three layers of top plate, 11. support replacements, 12. mountain flour slag slags, 13. minus two Layer exterior wall, 14. minus two layers of top plate, 15. negative one layer exterior wall, 16. negative one layer top plate, 17. car ramps, 18.18# I-steel.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right The present invention is further elaborated, it should be understood that and the specific embodiments described herein are merely illustrative of the present invention, and It is not used in the restriction present invention.
Schematic diagram disclosed by the invention is as shown in Figs 1-4, a kind of bracing demolition and basement construction for deep basal pit Method, suitable for the Demolition Construction of the annular brace with twice or more in deep basal pit, the innermost layer of deep basal pit shown in Fig. 1 Outer layer equipped with protection support pile 1, support pile 1 is equipped with annular internal brace 3, and four sides are equipped between the support pile 4 and annular internal brace 3 Angle brace, the corner of the annular internal brace 3 are additionally provided with horizontal angle brace 4.
A kind of bracing demolition and basement construction method for deep basal pit, comprising the following steps:
1) it finishes in foundation pit construction, after the completion of basement engineering stake 5 is constructed, first by negative Tipple Bottom plate 8, minus three layers of top plate 10 and negative Three layers of 9 pouring construction of exterior wall are completed, and then pour short support supporting beam between minus three layers of exterior wall 9 and deep basal pit surrounding support pile 1 Support replacement 11 is formed, and carries out the backfill of mountain flour slag 12 between support replacement 11 and negative Tipple Bottom plate 8;In support replacement 11 after short support beam support replacement 11 Supporting frame is set up under beam, then removes second support 7.
2) before removing second and supporting 7 beams, the short support in four sides for being used to protect 2 is removed with annular internal brace 3, when dismounting, The short support 2 in four sides is first removed, then removes annular internal brace 3, finally removes four horizontal angle braces 4, makes concrete inner support and annular water Flat inner support beam is detached from, and the short support 2 in four sides of symmetrical cutting, balance release stress, by the short support 2 in four sides and annular are synchronized since two sides After inner support 3 is removed, second support 7 is removed.
3) after the completion of second support 7 is removed, first of support 6 is removed, before removing first of support 6, first by minus two Layer top plate 14, minus two layers of exterior wall 13, the construction of negative one layer exterior wall 15 are completed, are then poured between negative second floor exterior wall 13 and support pile 1 It builds short support supporting outrigger and forms support replacement 11, and backfill mountain flour slag 12 between minus two layers of support replacement 11 and minus three layers of support replacement 11, finally First of support 6 is removed again, and first of support 6, which is removed, completes after-pouring negative one layer top plate 16, and in negative one layer exterior wall 15 and branch Mountain flour slag 12 is backfilled between fender pile 1.
Can be laid between basement floor car ramp 17 connection pass through, but car ramp 17 due to its ramp portion top without Structural beam slab makes the external wall at this position after the foundation pit outside pressure at this position is transmitted by the support replacement 11 on the outside of outer wall of basement Be formed as cantilever design, and make external wall crack due to lateral pressure is excessive, or even will cause supporting construction and be affected safely.? After backfilling mountain flour slag 12 between each layer exterior wall and support pile 1, support protection, method are as follows: automobile slope are done at car ramp 17 The top in road 17 uses 18 pairs of Two bors d's oeuveres 18# I-steel supports, the end of the 18# I-steel 18 and 17 two sides concrete of car ramp The pre-buried steel plate of wall is welded and fixed, and 18 bottom surface of 18# I-steel is equipped with support frame member support, the 18# I-steel 18 and branch Lateral steel pipe on support part is welded and fixed in crux, supports the vertical steel on the lateral steel pipe and support frame member in frame member Pipe is connected by fastener, and it is whole to form a support.Simultaneously, it is laid with the construction that supporting frame also facilitates upper layer car ramp 17 It pours.
Preferably, the support replacement 11 is poured using C20 plain concrete, and the center line of support replacement 11 and corresponding floor Top plate thickness center line is consistent.
Preferably, the 18# I-steel 18 is by being welded into Two bors d's oeuveres 18# I-steel 18.
Preferably, the short support 2 in four side is removed with annular internal brace 3 using special-purpose rope saw cutting process.Interior branch after cutting Support beam is hoisted to the lorry on foundation pit side by tower crane, and the inner support beam of local handling inconvenience can pass through forklift transport to tower crane Range is lifted, then is hoisted to the lorry on foundation pit side by tower crane, finally concentrates and is transported to outside the venue.The branch big for partial volume After the completion of supportting beam cutting, is transported along traffic route to truck crane hoisting port using fork truck, transported by crane handling entrucking.
If deep basal pit has the support of third road, dismounting sequence is still up successively removed together from bottom, is first done before removing The short support support replacement 11 of good this layer of top plate.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its Equivalent thereof.

Claims (7)

1. a kind of bracing demolition and basement construction method for deep basal pit, comprising the following steps:
Step 1: finish in foundation pit construction, basement engineering stake (5) construction after the completion of, first by negative Tipple Bottom plate (8), three layers minus Exterior wall (9) and minus three layers of top plate (10) pouring construction are completed, then minus three layers of exterior wall and the support pile (1) of deep basal pit surrounding it Between pour short support supporting beam and form support replacement (11), and carry out time of mountain flour slag (12) between support replacement (11) and negative Tipple Bottom plate (8) It fills out;
Step 2: after completing step 1, first removing foundation pit annular internal brace (3) and the short support (2) in four sides, then removes second support (7);
Step 3:, first will be outside minus two layers of exterior wall (13), minus two layers of top plate (14) and negative one layer after second supports (7) to remove Wall (15) construction is completed, and short support supporting outrigger is then poured between minus two layers of exterior wall (13) and support pile (1) and forms support replacement (11), mountain flour slag (12) and between minus two layers of support replacement (11) and minus three layers of support replacement (11) are backfilled, finally remove first of support (6), it removes and completes after-pouring negative one layer top plate (16), and backfill mountain flour slag between negative one layer exterior wall (15) and support pile (1) (12);
The dismounting of Brace in Deep Footing Groove also needs to carry out the support protection of basement car ramp (17), method are as follows: on automobile slope The top in road (17) is using Two bors d's oeuveres 18# I-steel (18) to support, the end of the 18# I-steel (18) and car ramp (17) two Concrete walls pre-buried steel plate in side is welded and fixed, and the 18# I-steel (18) is equipped with scaffold support.
2. a kind of bracing demolition and basement construction method, feature for deep basal pit according to claim 1 exists In: the short support (2) in four sides and annular internal brace (3) are using the dismounting of special-purpose rope saw cutting process.
3. a kind of bracing demolition and basement construction method, feature for deep basal pit according to claim 1 exists In: the center line of the support replacement (11) is consistent with the mid-depth line of floor roof.
4. a kind of bracing demolition and basement construction method, feature for deep basal pit according to claim 1 exists In: the support replacement (11) is poured using C20 plain concrete.
5. a kind of bracing demolition and basement construction method, feature for deep basal pit according to claim 1 exists In: the support replacement (11) pours to need to set up supporting frame under lower support replacement (11) after the completion.
6. a kind of bracing demolition and basement construction method, feature for deep basal pit according to claim 1 exists In: two 18# I-steel (18) are by being welded into Two bors d's oeuveres 18# I-steel (18).
7. a kind of bracing demolition and basement construction method, feature for deep basal pit according to claim 1 exists In: the 18# I-steel (18) and the lateral steel-pipe welding of scaffold are fixed, the scaffold transverse direction steel pipe and scaffold it is perpendicular It is connected to steel pipe by fastener.
CN201910311462.8A 2019-04-18 2019-04-18 A kind of bracing demolition and basement construction method for deep basal pit Pending CN110029674A (en)

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Application Number Priority Date Filing Date Title
CN201910311462.8A CN110029674A (en) 2019-04-18 2019-04-18 A kind of bracing demolition and basement construction method for deep basal pit

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08284437A (en) * 1995-04-19 1996-10-29 Toda Constr Co Ltd Method for demolishing land slide protection wall
CN101718094A (en) * 2009-11-10 2010-06-02 朱奎 Construction method for retaining and protecting foundation pit of building with basemen
CN201746839U (en) * 2010-06-13 2011-02-16 中建三局建设工程股份有限公司 Low-environment-disturbance device for removing supports from foundation pit
CN201809774U (en) * 2010-09-16 2011-04-27 中建三局建设工程股份有限公司 Foundation ditch support replacement and inner support removal construction structure
CN102828520A (en) * 2012-09-11 2012-12-19 中煤科工集团武汉设计研究院中汉岩土工程分公司 Ring-shaped inner supporting structure used in deep peat soil deep foundation pit
CN208168426U (en) * 2018-05-11 2018-11-30 深圳市中邦(集团)建设总承包有限公司 A kind of basement ramp position inner support section steel beam reinforcement system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08284437A (en) * 1995-04-19 1996-10-29 Toda Constr Co Ltd Method for demolishing land slide protection wall
CN101718094A (en) * 2009-11-10 2010-06-02 朱奎 Construction method for retaining and protecting foundation pit of building with basemen
CN201746839U (en) * 2010-06-13 2011-02-16 中建三局建设工程股份有限公司 Low-environment-disturbance device for removing supports from foundation pit
CN201809774U (en) * 2010-09-16 2011-04-27 中建三局建设工程股份有限公司 Foundation ditch support replacement and inner support removal construction structure
CN102828520A (en) * 2012-09-11 2012-12-19 中煤科工集团武汉设计研究院中汉岩土工程分公司 Ring-shaped inner supporting structure used in deep peat soil deep foundation pit
CN208168426U (en) * 2018-05-11 2018-11-30 深圳市中邦(集团)建设总承包有限公司 A kind of basement ramp position inner support section steel beam reinforcement system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
应惠清等: "《土工工程施工 下 第3版》", 31 May 2018 *

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