CN103104102A - Construction method for underground storey-addition reconstruction - Google Patents
Construction method for underground storey-addition reconstruction Download PDFInfo
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- CN103104102A CN103104102A CN2013100369261A CN201310036926A CN103104102A CN 103104102 A CN103104102 A CN 103104102A CN 2013100369261 A CN2013100369261 A CN 2013100369261A CN 201310036926 A CN201310036926 A CN 201310036926A CN 103104102 A CN103104102 A CN 103104102A
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Abstract
The invention discloses a construction method for underground storey-addition reconstruction. The construction method for underground storey-addition reconstruction is used for stretching a base board and a structure column of existing buildings downward and includes the following steps: (1) enabling plural holes to be formed in the base board, (2) constructing a root pile to the holes, (3) constructing plural bonded rebars around the structure column, (4) pouring a concrete bearing platform on the base board, (5) smashing and removing the base board and excavating earthwork on the lower portion of the base board to a designed base, (6) casting a concrete foundation on the basement, and further casting a concrete column to connect with the structure column, and (7) removing the bearing platform and the part of the root pile which is exposed from the concrete foundation, and completing construction. The root pile is utilized as the base board of the existing building and as temporary support for the structure column. In the process of earthwork downward excavation and stability of the existing building is guaranteed. The problem that the structure column stretches downward can be well solved, and the purposes that bottom layer is heightened and underground storey-addition is reconstructed are achieved. The construction method for underground storey-addition reconstruction is wide in promotion prospects.
Description
Technical field
The present invention refers in particular to a kind of underground layer rebuilding construction method that increase of utilizing root pile to support conversion about a kind of underground layer rebuilding construction method that increase.
Background technology
City of the world's Experience in Development shows, the rational exploitation and utilization urban underground space is the important channel of Resources for construction economy type, Environment-friendly city, is the Important Action of realizing urban sustainable development.Given this, for the exploitation of urban underground space, want to seek a kind of job practices, can reach the existing building pillar to downward-extension, reach that bottom increases and basement increases the purpose of layer transformation.
Summary of the invention
Because the problems referred to above, the invention provides a kind of underground layer rebuilding construction method that increase, be used for the base plate of existing building and structural column comprising the following steps to downward-extension:
(1) offer plurality of holes along all symmetries of described structural column one on described base plate, and extend downward in the bottom earthwork of described base plate;
(2) root pile is passed described construction of bottom plates in described hole;
(3) mutually intersect along the complex root bar planting of radially constructing described one week of structural column, and with described bar planting and the main muscle of exposing of described root pile;
(4) build a concrete bearing platform on described base plate, the main muscle of exposing of described root pile and described bar planting all are anchored in described cushion cap;
(5) after described root pile and described cushion cap all reach design strength, pound except described base plate, and the bottom earthwork of excavating described base plate is to designing substrate;
(6) build a concrete foundation in described substrate, and further build a concrete column on described concrete foundation until be connected with described structural column;
(7) after described concrete foundation and described concrete column reach design strength, remove the part that described cushion cap and described root pile expose described concrete foundation, complete construction.
Further, in step (2), also comprise step:
(21) put into a reinforcing cage in described hole;
(22) concreting in described hole, form described root pile.
Further, in step (2), when the retaining wall in described hole can not meet the demands, also comprise step:
(21) put into a steel sleeve in described hole;
(22) put into a reinforcing cage in described steel sleeve;
(23) concreting in described steel sleeve along with the increase of concreting height, is extracted described steel sleeve successively, forms described root pile.
Further, the pile body diameter of described root pile is not less than 150mm, the long 30m that is no more than of stake, and concrete strength of pile is not less than C20, and reinforcing cage master muscle is no less than 3.
Further, the main muscle of exposing of described root pile is bent, be beneficial to anchoring.
Further, also comprise afterwards step in step (3): lay one deck separation layer on described base plate.
Further, in step (5), stage excavation is carried out in the bottom earthwork of described base plate, one section of every excavation adds strengthening support according to root pile space stiffness needs and reinforces between two relative described root piles.
Further, described strengthening support comprises a supporting rod and two steel pipes, and described two steel pipes adopt being nested in respectively on two relative described root piles by welding after minute cutting, and described supporting rod is connected with described two steel-pipe weldings.
Further, described supporting rod is type steel support, and described steel duct adopts the high-strength grout perfusion closely knit.
Further, in step (6), the reinforcing bar of described concrete foundation first is installed, and the reinforcing cage master muscle of described concrete column and the muscle of being advocated of described structural column are adopted mechanical connection or be welded to connect, build again described concrete foundation, the reinforcing cage of described concrete column is anchored in described concrete foundation, builds again described concrete column at last until be connected with described structural column.
A kind of underground layer rebuilding construction method that increase of the present invention, utilize root pile as the base plate of existing building and the temporary supporting of structural column, in the process of downward earth excavation, guarantee the stable of existing building, after the base plate of existing building and structural column are completed to downward-extension, remove again root pile, namely complete construction.Pass through this method, can better solve the frame construction post to the problem of downward-extension, reach that bottom increases and basement increases the purpose of layer transformation, at the rational exploitation and utilization urban underground space, in the process of Resources for construction economy type, Environment-friendly city, has wide promotion prospect.
Description of drawings
Fig. 1 is the underground layer flow chart of rebuilding construction method that increase of the present invention.
Fig. 2 is the underground layer schematic diagram of the front existing construction foundation of rebuilding construction method construction that increase of the present invention.
Fig. 3 is the underground layer schematic diagram of rebuilding construction method root pile construction that increase of the present invention.
Fig. 4 is the local enlarged diagram of root pile in Fig. 3.
Fig. 5 is the underground schematic diagram that increases after layer rebuilding construction method cushion cap built of the present invention.
Fig. 6 is that the underground layer rebuilding construction method that increase of the present invention pounded except the schematic diagram after base plate and earth excavation.
Fig. 7 is underground schematic diagram after increasing layer rebuilding construction method concrete foundation and concrete column and building of the present invention.
Fig. 8 is the underground schematic diagram that increases after layer rebuilding construction method cushion cap and root pile are removed of the present invention.
The specific embodiment
Before construction, at first the foundation of existing building is identified, take dewatering measure according to the groundwater table situation, by the unit with corresponding qualification and experienced professional and technical personnel's complete design drawing, be responsible for construction by the unit with corresponding qualification and experienced professional and technical personnel according to identifying achievement.
Cooperation referring to shown in Figure 1, is a kind of underground layer flow chart of rebuilding construction method that increase of the present invention, comprises the following steps:
S1, symmetry is offered plurality of holes on base plate 10.
Cooperation is referring to shown in Figure 2, the existing building basis comprises base plate 10 and structural column 11, cooperation is adopted rig pore-forming symmetry to offer plurality of holes 13 along described 11 1 weeks of structural column on described base plate 10, and is extended downward in the bottom earthwork 14 of described base plate 10 referring to shown in Figure 3.
S2 constructs a root pile 20 in described hole 13.
Cooperation is referring to shown in Figure 3, and when the retaining wall in described hole 13 can meet the demands, this step comprised step:
(21) put into a reinforcing cage in described hole;
(22) concreting in described hole, form described root pile.
Cooperation is referring to Fig. 3 and shown in Figure 4, and when the retaining wall in described hole 13 can not meet the demands, this step comprised step:
(21) put into a steel sleeve 21 in described hole 13;
(22) put into a reinforcing cage 22 in described steel sleeve 21, and the main muscle 220 of exposing of described reinforcing cage 20 is bent, be beneficial to anchoring;
(23) concreting in described steel sleeve 21 along with the increase of concreting height, is extracted steel sleeve 21 successively, forms described root pile 20.
Cooperation is referring to Fig. 4, shown in Figure 5, described root pile 20 comprises pile concrete 23 and reinforcing cage 22, described root pile 20 adopts clear water or natural mud off to construct in the bottom of described base plate 10 earthwork 14, and steel sleeve 21 is set when retaining wall can not meet the demands.The pile body diameter of described root pile 20 is not less than 150mm, the long 30m that is no more than of stake, and pile concrete 23 intensity are not less than C20, and the main muscle of reinforcing cage 22 is no less than 3, and the reinforcing cage external diameter is less than design stake footpath 40 ~ 60mm.Pile concrete 23 to described root pile 20 is taked quarantine measures with the contact site of described base plate 10.Further, the vertical bearing capacity of single pile of described root pile 20 determines by the single pile load test, simultaneously the restriction of the foundation deformation condition of considering existing building of determining to take an examination of the vertical bearing capacity of single pile of described root pile 20 and the requirement of strength of pile shaft material.
S3 is in a plurality of bar plantings of described structural column 11 1 week construction.
Again coordinate referring to shown in Figure 3, at the described base plate of distance 10 end face 100mm places, along a plurality of bar plantings 12 of radially constructing described 11 1 weeks of structural column, and the main muscle 220 of described bar planting 12 and exposing of described root pile 20 is intersected mutually, the requirement of bar planting 12 and bar gauge, model meet relevant criterion and designing requirement.
S4 builds a concrete bearing platform on described base plate 10.
Again coordinate referring to shown in Figure 5, do paving one deck separation layer 15 on described base plate 10, this separation layer 15 can adopt malthoid.Then build on described base plate 10 a concrete bearing platform 30(or rectangle lift beam or " ten " word intersect lift beam), described root pile 20 expose main muscle 220 and described bar planting 12 all is anchored in described cushion cap 30.
Wherein, described cushion cap 30 is centered by described structural column 11, bar planting 12 by described structural column 11 borders closely connects with described structural column 11, described cushion cap 30 closely connects with described root pile 20 by the main muscle 220 of exposing of described root pile 20, and described cushion cap 30 is isolated with described base plate 10 by described separation layer 15.
S5 is pounded except described base plate 10 and the bottom earthwork 14 of excavating described base plate 10 to the design substrate.
Cooperation is referring to shown in Figure 6, after described root pile 20 and described cushion cap 30 all reach design strength, pound except described base plate 10, and the bottom earthwork 14 of excavating described base plate 10 is to design substrate 15.
Wherein, in the shoveling process, stage excavation is carried out in the bottom earthwork 14 of described base plate 10, one section of every excavation all adds a strengthening support 40 and reinforces between adjacent two described root piles 20.Described strengthening support 40 comprises a supporting rod 41 and two steel pipes 42, described supporting rod 41 can be type steel support, described two steel pipes 42 adopt being nested in respectively on adjacent two described root piles 20 by welding after minute cutting, the internal diameter of described steel pipe 42 surpasses more than the diameter 50mm of described root pile 20, described supporting rod 41 is welded to connect with described two steel pipes 42, and described steel pipe 42 is inner adopts the high-strength grout perfusion closely knit.
S6 builds a concrete foundation in described substrate 15, and further builds a concrete column and be connected with described structural column 11.
Cooperation is built a concrete foundation 50 referring to shown in Figure 7 in described substrate 15, and further builds a concrete column 51 on described concrete foundation 50 until be connected with described structural column 11.In construction, described concrete foundation 50 and described concrete column 51 are constructed according to design drawing, the reinforcing bar of described concrete foundation 50 first is installed, and the reinforcing cage master muscle of described concrete column 51 and the muscle of being advocated of described structural column 11 are adopted mechanical connection or be welded to connect, build again described concrete foundation 50, the reinforcing cage of described concrete column 51 is anchored in described concrete foundation 50, builds again at last described concrete column 51 until be connected with described structural column 11.
S7 removes the part that described cushion cap 30 and root pile 20 expose described concrete foundation 50, completes construction.
Cooperation is referring to shown in Figure 8, after described concrete foundation 50 and described concrete column 51 reach design strength, removes the part that described cushion cap 30 and described root pile 20 expose described concrete foundation 50, completes construction.
the above is only preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet be not to limit the present invention, any those skilled in the art, in the scope that does not break away from technical solution of the present invention, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, any simple modification that foundation technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. underground layer rebuilding construction method that increase is used for the base plate of existing building and structural column it is characterized in that comprising the following steps to downward-extension:
(1) offer plurality of holes along all symmetries of described structural column one on described base plate, and extend downward in the bottom earthwork of described base plate;
(2) root pile is passed described construction of bottom plates in described hole;
(3) mutually intersect along the complex root bar planting of radially constructing described one week of structural column, and with described bar planting and the main muscle of exposing of described root pile;
(4) build a concrete bearing platform on described base plate, the main muscle of exposing of described root pile and described bar planting all are anchored in described cushion cap;
(5) after described root pile and described cushion cap all reach design strength, pound except described base plate, and the bottom earthwork of excavating described base plate is to designing substrate;
(6) build a concrete foundation in described substrate, and further build a concrete column on described concrete foundation until be connected with described structural column;
(7) after described concrete foundation and described concrete column reach design strength, remove the part that described cushion cap and described root pile expose described concrete foundation, complete construction.
2. a kind of underground layer rebuilding construction method that increase as claimed in claim 1, is characterized in that, in step (2), also comprises step:
(21) put into a reinforcing cage in described hole;
(22) concreting in described hole, form described root pile.
3. a kind of underground layer rebuilding construction method that increase as claimed in claim 1, is characterized in that, in step (2), also comprises step:
(21) put into a steel sleeve in described hole;
(22) put into a reinforcing cage in described steel sleeve;
(23) concreting in described steel sleeve along with the increase of concreting height, is extracted described steel sleeve successively, forms described root pile.
4. a kind of underground layer rebuilding construction method that increase as claimed in claim 2, is characterized in that the pile body diameter of described root pile is not less than 150mm, the long 30m that is no more than of stake, and concrete strength of pile is not less than C20, and reinforcing cage master muscle is no less than 3.
5. a kind of underground layer rebuilding construction method that increase as claimed in claim 1, is characterized in that the main muscle of exposing of described root pile is bent, and is beneficial to anchoring.
6. a kind of underground layer rebuilding construction method that increase as claimed in claim 1, is characterized in that, also comprises afterwards step in step (3): lay one deck separation layer on described base plate.
7. a kind of underground layer rebuilding construction method that increase as claimed in claim 1, it is characterized in that, in step (5), stage excavation is carried out in the bottom earthwork of described base plate, one section of every excavation adds strengthening support according to root pile space stiffness needs and reinforces between two relative described root piles.
8. a kind of underground layer rebuilding construction method that increase as claimed in claim 6, it is characterized in that described strengthening support comprises a supporting rod and two steel pipes, described two steel pipes adopt being nested in respectively on two relative described root piles by welding after minute cutting, and described supporting rod is connected with described two steel-pipe weldings.
9. a kind of underground layer rebuilding construction method that increase as claimed in claim 7, is characterized in that described supporting rod is type steel support, and described steel duct adopts the high-strength grout perfusion closely knit.
10. a kind of underground layer rebuilding construction method that increase as claimed in claim 1, it is characterized in that, in step (6), the reinforcing bar of described concrete foundation first is installed, and the reinforcing cage master muscle of described concrete column and the muscle of being advocated of described structural column are adopted mechanical connection or be welded to connect, build again described concrete foundation, the reinforcing cage of described concrete column is anchored in described concrete foundation, build again described concrete column at last until be connected with described structural column.
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| CN201310036926.1A CN103104102B (en) | 2013-01-31 | 2013-01-31 | Construction method for underground storey-addition reconstruction |
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| CN201310036926.1A CN103104102B (en) | 2013-01-31 | 2013-01-31 | Construction method for underground storey-addition reconstruction |
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| CN103104102B CN103104102B (en) | 2015-07-01 |
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Cited By (7)
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| CN107654082A (en) * | 2016-07-25 | 2018-02-02 | Ext株式会社 | Using basic building block it is vertical under to enlarging technique |
| CN109339088A (en) * | 2018-10-08 | 2019-02-15 | 贺州通号装配式建筑有限公司 | A kind of low-rise building |
| CN109356396A (en) * | 2018-10-18 | 2019-02-19 | 上海电气电站环保工程有限公司 | A kind of ruggedized construction and its construction method of steel structure column |
| CN109898882A (en) * | 2019-03-28 | 2019-06-18 | 上海勘察设计研究院(集团)有限公司 | A kind of anchor jacked pile combination underpinning structure and its method for existing building underground increasing layer |
| CN110499928A (en) * | 2019-07-25 | 2019-11-26 | 广东庆余堂建筑科技有限公司 | The construction method and basement of existing building basement raising chamber height |
| CN110565981A (en) * | 2019-09-11 | 2019-12-13 | 上海建工一建集团有限公司 | storey-adding method and structure for underground space of existing building |
| CN110886507A (en) * | 2019-12-11 | 2020-03-17 | 北京中岩智泊科技有限公司 | Method for adding floor and expanding under existing building |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107654082A (en) * | 2016-07-25 | 2018-02-02 | Ext株式会社 | Using basic building block it is vertical under to enlarging technique |
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| CN110565981A (en) * | 2019-09-11 | 2019-12-13 | 上海建工一建集团有限公司 | storey-adding method and structure for underground space of existing building |
| CN110886507A (en) * | 2019-12-11 | 2020-03-17 | 北京中岩智泊科技有限公司 | Method for adding floor and expanding under existing building |
| CN110886507B (en) * | 2019-12-11 | 2024-02-13 | 北京中岩智泊科技有限公司 | Method for increasing storey and expanding under existing building |
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| CN103104102B (en) | 2015-07-01 |
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