CN103088830A - Construction method for composite outer wall structure of ultra-deep basement - Google Patents
Construction method for composite outer wall structure of ultra-deep basement Download PDFInfo
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- CN103088830A CN103088830A CN2013100401464A CN201310040146A CN103088830A CN 103088830 A CN103088830 A CN 103088830A CN 2013100401464 A CN2013100401464 A CN 2013100401464A CN 201310040146 A CN201310040146 A CN 201310040146A CN 103088830 A CN103088830 A CN 103088830A
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Abstract
A construction method for a composite outer wall structure of an ultra-deep basement relates to the technical field of building construction and comprises the steps of arrangement of piles and top beams, foundation pit earth excavation, foundation pit protection, waterproofing joint construction, waterproofing construction and basement outer wall construction. During the foundation pit soil excavation, a transverse waist beam is arranged, and the transverse waist beam is fixedly connected with the piles arranged. In the process of the foundation pit earth excavation, concrete is sprayed on an inner surface of a foundation pit between the arranged piles at any times. After the foundation pit earth excavation is finished, construction of a water-proof layer and a protection layer is performed on an inner surface of the foundation pit protection structure. When the outer wall of the basement is constructed, outer wall steel bars of the basement are bond on the outer surface of the protection layer, and an outer wall inner template of the basement is arranged on the outer sides of the steel bars. Furthermore, concrete is poured between the outer surface of the protection layer and the outer wall inner template of the basement, and after maintenance, the outer wall inner template of the basement is disassembled. The construction method for the composite outer wall structure of the ultra-deep basement reduces construction amount and saves construction cost. A wall body of the basement is tightly combined with the inner surface of a support structure of the foundation pit.
Description
Technical field
The present invention relates to technical field of building construction, disclose a kind of job practices of super dark basement composite external wall structure.
Background technology
When super dark (being often referred to: more than 12m) outer wall of basement " pile wall interaction " is constructed; usually first build basement space enclosing structure and water-stop curtain; then build brick wall by laying bricks or stones outside the basement space enclosing structure; and fill out concrete between space enclosing structure and brick wall; do waterproofing course and fish tail and waterproof layer cut up with a hay cutter the powder cement mortar outside brick wall after; finish after fish tail and waterproof layer the vertical inside wall formwork of assembling reinforcement again, placing of concrete forms basement wall.
In addition, before the construction outer wall waterproof, need to first build brick wall by laying bricks or stones, spent human and material resources are larger.Therefore, existing super dark outer wall of basement construction cost cost is high, also has great potential safety hazard.
Summary of the invention
The object of the invention is to provide the job practices of a kind of convenient construction, safety is good, cost is low super dark basement composite external wall structure.
The present invention includes and arrange pile, Guan Liang, pit earthwork excavation, pattern foundation pit supporting structure, waterproofing node construction, waterproof construction and outer wall of basement construction sequence, it is characterized in that when pit earthwork excavates, horizontal waist rail is set, is fixedly connected with between each pile of described waist rail and arrangement; In the pit earthwork digging process, at any time the foundation ditch inner surface between the pile of arranging is implemented sprayed mortar; After the pit earthwork excavation finishes, then the foundation pit supporting construction inner surface is carried out waterproofing course and topping construction; When described outer wall of basement construction; at the external surface colligation outer wall of basement reinforcing bar of topping, set up the outer wall of basement inner formword in the reinforcing bar outside, then between the external surface of topping and outer wall of basement inner formword concreting; after maintenance, remove the outer wall of basement inner formword.
The present invention is by above job practices; formation has necessarily the flexible water basic unit from the sealing of waterproof ability; when building basement wall; direct external surface assembling reinforcement at topping; then the opposite side in assembling reinforcement arranges the wall internal mould plate, then between the wall internal mould plate of topping placing of concrete, after maintenance; remove inside wall formwork, form basement wall.
Adopt the present invention to need not to set up and remove the outer wall template operation, reduced construction volume, saved construction cost, the basement wall and the foundation pit supporting construction inner surface that form are combined closely, and have reduced between foundation pit supporting construction inner surface and basement waterproofing base course wall interval to recharge concrete working procedure.
In addition, the present invention accomplishes outside arch camber with soil between pile before implementing sprayed mortar, and the rise of described arch camber is 100mm ~ 15mm.Between stake, sprayed mortar arranges the protection of inter-pile soil, has utilized well the arch Force principle herein, to improve the intensity of foundation ditch.
For super dark underground foundation ditch, usually adopt highly larger pile, topple in order to prevent pile, between ground, anchor pole is being set outside each pile and pit earthwork, the waist rail position employing 20mm bar dowel of horizontally set is fixed at steel mesh reinforcement cross intersection point place and girder steel spot welding, steel mesh reinforcement should wrap up the channel-section steel waist rail comprehensively, and be connected with Tu Bi position steel mesh reinforcement, angle local enhancement pile body and the native wall angle position increase gauze wire cloth that should adopt steel mesh reinforcement to be 45 ° between waist rail up and down and pile body angle position and waist rail and native wall carry out the part reinforcement, prevent cracking.
Description of drawings
The composite exterior wall structural plan schematic diagram of Fig. 1 for being shaped.
Fig. 2 is that the A-A of Fig. 1 is to sectional drawing.
The specific embodiment
As shown in Figure 1, 2, construction sequence of the present invention is as follows:
1, preparation of construction: technology is prepared, material is prepared.
2, measurement and positioning: emit axis by construction drawing, emit each position and the stake footpath of campshed, dig before stake and should draw heart control point to surrounding by engineering axis (center line), with firmly timber (portal frame) demarcation.
3, campshed construction: press drawing and code requirement, adopt each pile 1 of common process construction campshed.
4, Guan Liang construction: press drawing and code requirement, adopt common process construction stake apical cap beam.
5, pit earthwork excavation: the staged and layered piecemeal is cut the earth, the first intermediate and then both sides, and with digging with support, completion in limited time.During soil excavation, should note to collide the pile of having constructed in foundation ditch, for soil between pile, should use little digging machine to draw and dig, the whole cleaning of soil is stacked to open area, then carry out secondary entrucking transhipment.
Every layer of excavation of foundation pit is complete, and soil 2 between pile 1 is accomplished the outside arch camber that rise H is 100mm ~ 15mm, sprays immediately first floor concrete 3.Adopt dampen shotcreting method, bury at the hole wall winning post of controlling concrete thickness underground before construction, and the thickness of the good sprayed mortar of mark.During sprayed mortar, can according to hole wall soil moisture in layer and shoveling speed, add the accelerating admixture of 3% left and right.Before sprayed mortar, with first clearing up domatic loosened soil, loose ground, the spraying operation segmentation is carried out, and in same segmentation, injection order from bottom to top.After sprayed mortar final set 2h, namely answer wet curing, curing time is preferably 3～7h.
Just pneumatically placed concrete should carry out after the side slope correction as early as possible, to stablize the foundation ditch wall, prevents that soil layer from occurring lax or peeling off.Lay after the spray of steel mesh reinforcement place, sprayed mortar for the second time should not less than 20mm, after the steel mesh reinforcement laying is complete, then be carried out in the gap between reinforcing bar and concrete.The thickness of first sprayed mortar is not less than 40mm, and jet thickness is preferably 50～70mm for the second time.
7 constructions of pile anchor cable: according to position, domatic measuring hole, fixedly rig is installed, the anchor hole drilling construction, boring aperture, hole depth must not require less than design load.For guaranteeing the anchor hole diameter, the actual bit diameter that uses of requirement must not be less than the design aperture.For guaranteeing hole depth, require actual drilling depth greater than more than projected depth 0.2m.After anchor hole bores and makes end, oblique rollering steel twisted wire between the ground of each pile and the pit earthwork outside, and employing hole-bottom slurry-injection method filling concrete mortar in the gap between each pile and corresponding anchor pole, grouting pressure generally is not less than 0.6～0.8MPa, mortar injection must be full closely knit, and no longer exhaust and aperture slurries overflow the standard that underflow finishes as slip casting with the ground tackle steam vent.Slip casting for the first time is complete, and after the cement mortar solidification shrinkage, slurry should be mended in the aperture, until till filling with.Anchor pier sphenoid and bearing plate are made simultaneously, adopt the C35 concrete integrated poured.Anchor pier concrete face is vertical with anchor pole.
Dig out pile master muscle or squeeze into expansion bolt, weld pad plate in the above, and on backing plate the weld groove steel, the connection between two channel-section steels of up and down is welded to connect by backing plate, the channel-section steel spreading of same position adopts welding, the above adds backing plate again and welds.Ground tackle pins anchor pole, and pressure is delivered to remake on the channel-section steel waist rail to use by backing plate and forms support system on soldier pile.
With φ 6.5@200 reinforcing bar binding net sheets, to be quincunx colligation with tied silk firm for the overlapped points of reinforcing bar in length and breadth.The sub-iron of fourth that is welded into φ 8 reinforcing bars at each cross intersection point place of net sheet.Hammer into one by one in native wall.Steel plate fastens with nailing and pile body every 500mm along stake is high after the arch springing place is with 5mm.Pile body and native wall angle position increase gauze wire cloth carry out the part and strengthen, and prevent cracking.
The waist rail position employing 20mm bar dowel of horizontally set is fixed at steel mesh reinforcement cross intersection point place and girder steel spot welding, steel mesh reinforcement should wrap up the channel-section steel waist rail comprehensively, and be connected with Tu Bi position steel mesh reinforcement, should adopt steel mesh reinforcement to be 45° angle degree local enhancement between waist rail up and down and pile body angle position and waist rail and native wall.
Steel mesh reinforcement is used cushion block and is propped up pad, guarantees protective layer thickness.
Waterproofing node construction: sprayed mortar simultaneously, should in time be processed for anchor cable end points, steel waist rail position for the second time, uses the concrete with the same strength grade of sprayed mortar.The anchor cable end points should be made the pier stake, and peripheral circular arc, waterproofing course should carry out the part and strengthen at this position.Arc chord angle should be made in waist rail and pile body angle and waist rail and Tu Bi intersection area, and arc chord angle also all should be made in all the other negative and positive angular positions, is beneficial to waterproof construction, and waterproof construction can be selected suitable construction technology according to waterproofing materials.
6, after the pit earthwork excavation finishes, then the foundation ditch inner surface is carried out waterproofing course 4 processing and topping 5 processing.
7, in the external surface assembling reinforcement of topping, then the opposite side in assembling reinforcement arranges the wall internal mould plate, and then casting cement mortar between the wall internal mould plate of topping, after maintenance, remove inside wall formwork, makes main wall body 6.
Claims (3)
1. the job practices of super dark basement composite external wall structure, comprise and arrange pile, Guan Liang, pit earthwork excavation, pattern foundation pit supporting structure, waterproofing node construction, waterproof construction and outer wall of basement construction sequence, it is characterized in that when pit earthwork excavates, horizontal waist rail is set, is fixedly connected with between each pile of described waist rail and arrangement; In the pit earthwork digging process, at any time the foundation ditch inner surface between the pile of arranging is implemented sprayed mortar; After the pit earthwork excavation finishes, then the foundation pit supporting construction inner surface is carried out waterproofing course and topping construction; When described outer wall of basement construction; at the external surface colligation outer wall of basement reinforcing bar of topping, set up the outer wall of basement inner formword in the reinforcing bar outside, then between the external surface of topping and outer wall of basement inner formword concreting; after maintenance, remove the outer wall of basement inner formword.
2. the job practices of super dark basement composite external wall structure according to claim 1, is characterized in that before implementing sprayed mortar, soil between pile being accomplished outside arch camber, and the rise of described arch camber is 100mm ~ 15mm.
3. the job practices of described super dark basement composite external wall structure according to claim 1 and 2, it is characterized in that between ground, anchor pole being set outside each pile and pit earthwork, the waist rail position employing 20mm bar dowel of horizontally set is fixed at steel mesh reinforcement cross intersection point place and girder steel spot welding, steel mesh reinforcement should wrap up the channel-section steel waist rail comprehensively, and be connected with Tu Bi position steel mesh reinforcement, angle local enhancement pile body and the native wall angle position increase gauze wire cloth that should adopt steel mesh reinforcement to be 45 ° between waist rail up and down and pile body angle position and waist rail and native wall carry out the part reinforcement, prevent cracking.
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| CN2013100401464A CN103088830A (en) | 2013-02-01 | 2013-02-01 | Construction method for composite outer wall structure of ultra-deep basement |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103981896A (en) * | 2014-04-11 | 2014-08-13 | 中建四局第六建筑工程有限公司 | Seamless connecting construction method for basement outer wall and fender piles |
| CN104196036A (en) * | 2014-09-01 | 2014-12-10 | 中建一局集团第三建筑有限公司 | Foundation pit supporting structure and method based on old basement exterior wall structure |
| CN104895327A (en) * | 2015-06-17 | 2015-09-09 | 青岛海川建设集团有限公司 | High-rise building basement concrete self-waterproofing construction process |
| CN106759843A (en) * | 2016-12-27 | 2017-05-31 | 宁波二十冶建设有限公司 | A kind of outer wall of basement waterproof construction and its construction method |
| CN106930271A (en) * | 2017-04-17 | 2017-07-07 | 西北综合勘察设计研究院 | It is a kind of to excavate the continuous side wall supporting and retaining system protective construction in underground and its construction method without fertile groove |
| CN110080242A (en) * | 2019-04-24 | 2019-08-02 | 广州市城市规划勘测设计研究院 | The construction method of basement pile wall interaction structural system |
| CN111550037A (en) * | 2020-05-29 | 2020-08-18 | 青岛东建建设有限公司 | Building outer wall construction method for foundation pit in narrow site |
| CN112962667A (en) * | 2021-02-08 | 2021-06-15 | 中国建筑第八工程局有限公司 | Outer wall structure of sinking yard and construction method thereof |
| CN113565102A (en) * | 2021-07-07 | 2021-10-29 | 深圳市中地建设工程有限公司 | Construction method for connecting concrete-saving waist beam with support pile |
| CN114934517A (en) * | 2022-05-18 | 2022-08-23 | 中建八局第一建设有限公司 | Foundation pit special-shaped continuous waist beam and construction method thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103981896A (en) * | 2014-04-11 | 2014-08-13 | 中建四局第六建筑工程有限公司 | Seamless connecting construction method for basement outer wall and fender piles |
| CN103981896B (en) * | 2014-04-11 | 2016-01-20 | 中建四局第六建筑工程有限公司 | The seamless link construction method of a kind of outer wall of basement and fender post |
| CN104196036A (en) * | 2014-09-01 | 2014-12-10 | 中建一局集团第三建筑有限公司 | Foundation pit supporting structure and method based on old basement exterior wall structure |
| CN104196036B (en) * | 2014-09-01 | 2016-04-13 | 中建一局集团第三建筑有限公司 | Based on foundation pit supporting construction and the supporting method of old outer wall of basement structure |
| CN104895327A (en) * | 2015-06-17 | 2015-09-09 | 青岛海川建设集团有限公司 | High-rise building basement concrete self-waterproofing construction process |
| CN106759843A (en) * | 2016-12-27 | 2017-05-31 | 宁波二十冶建设有限公司 | A kind of outer wall of basement waterproof construction and its construction method |
| CN106930271A (en) * | 2017-04-17 | 2017-07-07 | 西北综合勘察设计研究院 | It is a kind of to excavate the continuous side wall supporting and retaining system protective construction in underground and its construction method without fertile groove |
| CN110080242A (en) * | 2019-04-24 | 2019-08-02 | 广州市城市规划勘测设计研究院 | The construction method of basement pile wall interaction structural system |
| CN111550037A (en) * | 2020-05-29 | 2020-08-18 | 青岛东建建设有限公司 | Building outer wall construction method for foundation pit in narrow site |
| CN112962667A (en) * | 2021-02-08 | 2021-06-15 | 中国建筑第八工程局有限公司 | Outer wall structure of sinking yard and construction method thereof |
| CN112962667B (en) * | 2021-02-08 | 2022-08-30 | 中国建筑第八工程局有限公司 | Outer wall structure of sinking yard and construction method thereof |
| CN113565102A (en) * | 2021-07-07 | 2021-10-29 | 深圳市中地建设工程有限公司 | Construction method for connecting concrete-saving waist beam with support pile |
| CN113565102B (en) * | 2021-07-07 | 2022-07-29 | 深圳市中地建设工程有限公司 | Construction method for connecting waist beam and support pile for saving concrete |
| CN114934517A (en) * | 2022-05-18 | 2022-08-23 | 中建八局第一建设有限公司 | Foundation pit special-shaped continuous waist beam and construction method thereof |
| CN114934517B (en) * | 2022-05-18 | 2023-07-25 | 中建八局第一建设有限公司 | Special-shaped continuous waist beam for foundation pit and construction method thereof |
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Application publication date: 20130508 |