CN102733399A - Method for removing internal support concrete by static expansion - Google Patents

Method for removing internal support concrete by static expansion Download PDF

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Publication number
CN102733399A
CN102733399A CN2012102291680A CN201210229168A CN102733399A CN 102733399 A CN102733399 A CN 102733399A CN 2012102291680 A CN2012102291680 A CN 2012102291680A CN 201210229168 A CN201210229168 A CN 201210229168A CN 102733399 A CN102733399 A CN 102733399A
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CN
China
Prior art keywords
concrete
support
boring
expanding agent
static
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
CN2012102291680A
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Chinese (zh)
Inventor
刘秋生
石伟国
高原
乐雨
邵正俊
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
Original Assignee
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 CN2012102291680A priority Critical patent/CN102733399A/en
Publication of CN102733399A publication Critical patent/CN102733399A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a method for removing internal support concrete by static expansion, and relates to a technology for removing concrete members. The method comprises the following steps of: firstly, drilling holes on a concrete structure uniformly, then filling a mixture formed by an expanding agent and clean water into all the drilled holes, and after concrete is expanded, carrying out removal. The method has the advantages of small damage displacement to a supporting system, low noise and pollution and the like. Main materials in construction adopt the static expanding agent, the volume of the expanding agent is expanded, the expanding force is slowly and quietly transferred to the concrete support to achieve the purpose of crushing the concrete, the damage to surrounding structures is small, and the operational safety is high; and the expanding agent used by the technology is a nonflammable and nonexplosible safety product, and is free from special requirements on transportation, storage and construction, and the input removing cost for protection in a transportation process is greatly reduced.

Description

In removing, supports static expanding concrete method
Technical field
The present invention relates to the demolition technique of concrete component, support concrete technical field in particularly removing.
Background technology
Current urbanization development speed is very fast, and compact district, urban skyscraper basement is widely used again, and its excavation of foundation pit degree of depth is dark.Be to guarantee the safety of structure of engineering construction safety property and surrounding building in the deep foundation ditch, pattern foundation pit supporting structure generally adopts the inner supporting structure of stability under loading to constitute the support system of deep big foundation pit, the dismounting of difficult point for supporting that interior support construction is maximum.At present; The internal common gunpowder demolition blasting of supporting removal; Energy abrupt release during the gunpowder demolition blasting, the slungshot of generation is more to be constituted potential safety hazard, noise considerable influence resident daily life, vibration amplitude to peripheral constructor and causes the foundation pit deformation unstability more easily.
In sum, adopt the technology dismounting inner supporting structure of gunpowder demolition blasting can not guarantee that the supporting of deep foundation ditch is stable, cause great foundation ditch cave-in accident easily.
Summary of the invention
For addressing the above problem, patent of the present invention provides a kind of safe, low noise static expanding to remove the interior concrete method that supports.
Technical scheme of the present invention is: first evenly boring on concrete structure, will mix the mixture that forms with clean water by expansion agent then and be poured into and respectively hole, treat that concrete expands after, remove again.
With expansion agent with pour in the boring after clean water mixes; Utilize its hydration that hole wall is produced expansion force; Continue hole wall is produced the powerful expansion force up to 40~100 MPa, and concrete stretching resistance has only about 3~10 MPa, thereby can be easily that concrete is broken.
Advantage such as the present invention has that destroy displacement to support system is little, noise and pollution are low.The construction main material adopts the static expanding agent; Expansion agent volume expansion, expansion force are passed to concrete at leisure, quietly and are supported the static method for dismounting that reaches the broken purpose of concrete, destroy little to peripheral structure; Processing safety is high; And the expansion agent that should technology uses is a kind of nonflammable, inexplosive safety product, to transportation, store, the no specific (special) requirements of construction, reducing protection in the transportation widely, to drop into the dismounting cost low.In addition, this construction technology is simple to operate, does not need special training, and recruitment is both economical.
Beat on main muscle when preventing to hole, before boring, the concrete cover that will support concrete surface is earlier played cutter and is fallen, and exposes main muscle, when boring, avoids main muscle.
In time take dustproof blocking after the boring at boring surface.Can prevent that being blocked eyelet by foreign material causes secondary cleaning, additive decrementation manual work and duration.
Before the said mixture of perfusion, clear up, in case foreign material get in the hole when removing the interim dustproof shelter in each boring supporting concrete surface.
The specific embodiment
Operating process is:
1, set up and tear support open and return back to top and use scaffold: construct for ease and guarantee constructor's safety, in dismounting, all should set up scaffold before the brace summer, support body is 1.5m along the brace summer spacing, little cross bar spacing 3.0m.For preventing that floor slab structure from being damaged by falling object, before tearing support open, extend out below with interior brace summer projection in the zone of 1m and completely spread one deck steel basketry sheet.
2, manual work divests brace summer concrete surface protecting layer: the concrete cover that will support concrete surface with pneumatic pick is played cutter and is fallen, and exposes main muscle, provides convenience for avoiding reinforcing bar boring.
3, boring: (1) data of holes drilled, boring distribute and will confirm according to the actual conditions of the object of fragmentation, and take into full account arrangement of reinforcement situation in the beam, and general bore diameter is that 32mm, drilling depth are 100mm at the bottom of beam.Spacing is undertaken by the optimal spacing of test back comparative analysis, generally arranges density: 200*200mm dot matrix layout, but in order to guarantee that the concrete support post does not receive the influence of expansion agent expansion force, near holing in the support post 500mm scope.(2) drilling operation: adopt air compressor machine and rig concrete structures to be holed according to the data of holes drilled that designs.
4, pore-forming protection: hole drill well afterwards must be taked the temporary protection shutoff immediately, causes secondary cleaning, additive decrementation manual work and duration in case blocked eyelet by foreign material.
5, cleaning surface layer: must clear up the surface before the expansion agent in that brace summer is irritated, in case foreign material get into when removing the hole temporary protection.
6, inject mixture: inject by expansion agent and cleaning to each boring and mix the mixture of forming; In container, inject this expansion agent, add the water of expansion agent weight 20~30% simultaneously, mechanical agitation is even; The mixture after being mixed slurry must be poured in the boring in 3~10 minutes; The consumption in every meter hole is no less than 1.3kg, fills closely knitly, does not fill in mouth.
7, brace summer receives to ftracture behind the expansion force: the expansion agent perfusion is solidified after 8~12 hours and is begun to produce volume expansion; For high temperature season; Expansion agent solidifies 4~8h and just can reach volume expansion and destroy concrete structure, then the brace summer concrete loose broken purpose that reaches that becomes.
8, concrete surface is watered water treatment: concrete surface is watered before the artificial dismantling concrete structure, soak inside concrete, so that reach the effect that reduces dust pollution during dismantling concrete.
9, manual work divests the both sides concrete cover and exposes reinforcing bar: brace summer rebar surface concrete is all divested, expose stirrup and main muscle.
10, sever reinforcing bar: brace summer stirrup and the main muscle burning that will expose concrete surface with autogenous cutting machine are cut the back disconnection.
11, overall pulling down brace summer: after reinforcing bar cuts off, carry out the concrete overall pulling down of brace summer.
12, concrete disintegrating slag cleaning: remove the concrete disintegrating slag that produces and adopt self-tipping type bunker car to be transported in the suspension bucket through tower crane entrucking outward transport.

Claims (4)

1. support concrete method in static expanding is removed, it is characterized in that: evenly boring on concrete structure earlier, will mix the mixture that forms with clean water by expansion agent then and be poured into and respectively hole, treat that concrete expands after, remove again.
2. support concrete method in removing according to the said static expanding of claim 1, it is characterized in that: before boring, will support the positive concrete cover of concrete earlier and play cutter and fall, and expose main muscle, and when holing, avoid main muscle.
3. support concrete method in removing according to the said static expanding of claim 1, it is characterized in that: in time take dustproof blocking after the boring at boring surface.
4. support concrete method in removing according to the said static expanding of claim 1, it is characterized in that: before the said mixture of perfusion, clear up supporting concrete surface.
CN2012102291680A 2012-07-04 2012-07-04 Method for removing internal support concrete by static expansion Pending CN102733399A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012102291680A CN102733399A (en) 2012-07-04 2012-07-04 Method for removing internal support concrete by static expansion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012102291680A CN102733399A (en) 2012-07-04 2012-07-04 Method for removing internal support concrete by static expansion

Publications (1)

Publication Number Publication Date
CN102733399A true CN102733399A (en) 2012-10-17

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CN (1) CN102733399A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103967010A (en) * 2014-05-14 2014-08-06 中铁西北科学研究院有限公司深圳南方分院 Method for safely detaching anchor sealing concrete
CN105736000A (en) * 2016-03-08 2016-07-06 北京住总集团有限责任公司 Construction method for detaching shield forming tunnel zero ring duct pieces through static blasting
CN106679519A (en) * 2016-12-23 2017-05-17 中建八局第二建设有限公司 Static blasting demolition method for interior reinforced concrete supports
CN106869139A (en) * 2017-04-01 2017-06-20 杭州江润科技有限公司 A kind of reinforced concrete inner support ecology Demolition Construction method
CN110000172A (en) * 2019-03-02 2019-07-12 泉州市龙行贸易有限公司 A kind of construction equipment cleaning care device using expansion removal concrete block

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1050424A (en) * 1989-09-21 1991-04-03 杨森 Method for softening and breaking concrete
CN1097725A (en) * 1993-07-22 1995-01-25 地质矿产部山东省中心实验室 Mineral expanding agent
JPH11336338A (en) * 1998-05-28 1999-12-07 Kumagai Gumi Co Ltd Reinforced concrete structure demolishing method
CN102127975A (en) * 2011-04-14 2011-07-20 葛培中 Concrete beforehand pore-forming static breaking technology

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Publication number Priority date Publication date Assignee Title
CN1050424A (en) * 1989-09-21 1991-04-03 杨森 Method for softening and breaking concrete
CN1097725A (en) * 1993-07-22 1995-01-25 地质矿产部山东省中心实验室 Mineral expanding agent
JPH11336338A (en) * 1998-05-28 1999-12-07 Kumagai Gumi Co Ltd Reinforced concrete structure demolishing method
CN102127975A (en) * 2011-04-14 2011-07-20 葛培中 Concrete beforehand pore-forming static breaking technology

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杨国铭: "浅谈基坑围护中水平支撑梁系统的爆破拆除施工", 《中国高新技术企业》 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103967010A (en) * 2014-05-14 2014-08-06 中铁西北科学研究院有限公司深圳南方分院 Method for safely detaching anchor sealing concrete
CN103967010B (en) * 2014-05-14 2016-08-31 中铁西北科学研究院有限公司深圳南方分院 A kind of safe method for dismounting of sealing off and covering anchorage concrete
CN105736000A (en) * 2016-03-08 2016-07-06 北京住总集团有限责任公司 Construction method for detaching shield forming tunnel zero ring duct pieces through static blasting
CN105736000B (en) * 2016-03-08 2018-12-21 北京住总集团有限责任公司 The construction method of shield molding tunnel nullring section of jurisdiction is removed in a kind of static blasting
CN106679519A (en) * 2016-12-23 2017-05-17 中建八局第二建设有限公司 Static blasting demolition method for interior reinforced concrete supports
CN106869139A (en) * 2017-04-01 2017-06-20 杭州江润科技有限公司 A kind of reinforced concrete inner support ecology Demolition Construction method
CN110000172A (en) * 2019-03-02 2019-07-12 泉州市龙行贸易有限公司 A kind of construction equipment cleaning care device using expansion removal concrete block

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Application publication date: 20121017

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