CN103132531A - Foundation pit supporting system construction method - Google Patents
Foundation pit supporting system construction method Download PDFInfo
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- CN103132531A CN103132531A CN2013100634144A CN201310063414A CN103132531A CN 103132531 A CN103132531 A CN 103132531A CN 2013100634144 A CN2013100634144 A CN 2013100634144A CN 201310063414 A CN201310063414 A CN 201310063414A CN 103132531 A CN103132531 A CN 103132531A
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Abstract
The invention discloses a foundation pit supporting system construction method. The method includes the steps: firstly, driving steel sheet piles in a soil layer in design depth around a predetermined excavation foundation pit; secondly, after steel sheet pile construction is finished, welding steel top beams below tops of the steel sheet piles by means of full welding; and thirdly, after steel top beam construction is finished, performing earth excavation in a layered manner according to designed excavation depth, and when excavating to the designed depth, performing anchor cable construction. Anchor cable construction includes the steps: (a) performing anchor cable drilling, anchor rod mounting and grouting construction on the side wall of the foundation pit at intervals according to the designed length of anchor cables; (b) connecting wales with the steel sheet piles in a welded manner, if gaps are reserved between the wales and the steel sheet piles, using wedge steel pads to firmly pad the gaps, and then compactly connecting the wales, the wedge steel pads and the steel sheet piles; and (c) when strength of anchor rods is larger than 15MPa, tensioning the anchor rods, and locking the anchor cables. By the method, construction period is shortened effectively.
Description
Technical field
The present invention relates to building foundation pit supporting Construction Technology field, particularly a kind of foundation pit supporting system job practices.
Background technology
Along with the fast development of urban construction, a large amount of base pit engineerings has appearred.Base pit engineering has following characteristics: the emerging in large numbers of highrise building, and foundation depth is more and more darker; The foundation ditch area is increasing, and inner support arranges difficulty and increases; Oneself building, city planting ductwork and underground utilities are often arranged around foundation ditch, foundation pit deformation is had higher requirements; Deep foundation pit construction is long in time limit, narrow space, and the foundation pit construction difficulty is large.Common deep foundation pit supporting structure type has: deep-mixed pile supporting, campshed supporting, diaphragm wall supporting, soil-nail wall support, bored pile add soil anchor etc.Existing common supporting method must be after support engineering be completed, and can carry out the follow-up work such as ground works and carry out, so long construction period; Because the supporting method such as deep-mixed pile, bored pile mostly are greatly concrete structure, the construction circulation material has high input again, and the support system that forms is permanent, not recyclablely again utilize, so the engineering construction cost is higher.
Summary of the invention
For the problems referred to above, the invention discloses a kind of foundation pit supporting system job practices, the method has effectively shortened the duration and has saved cost.In order to reach above-mentioned technique effect, the present invention adopts following technical scheme: a kind of foundation pit supporting system job practices, it is characterized in that, and said method comprising the steps of:
One, the foundation ditch surrounding of predetermined excavation according to designing requirement by beating or during the method for vibropiling squeezes into the soil layer of projected depth with steel sheet pile;
Two, steel sheet pile construction complete after, return 0.15m-0.2m and adopt full weld weldable steel Guan Liang under steel sheet pile top;
Three, after completing, steel Guan Liang construction carries out soil excavation according to the cutting depth layering of design, when digging to projected depth, carry out anchor cable construction, the step of described anchor cable construction is: (a) in the length of foundation pit side-wall according to anchorage cable design, spacing is carried out boring, anchor bar body installation, the grouting construction of anchor cable; (b) be welded to connect adopting between waist rail and steel sheet pile, if between steel sheet pile and waist rail, the gap is arranged, adopt wedge shape steel pad pad firm between the gap, then closely knit with connecting between waist rail, wedge shape steel pad and steel sheet pile, guarantee that steel sheet pile integral body is stressed; (c) during greater than 15MPa, anchor bar body is carried out stretch-draw when anchor bar body intensity, the locking anchor cable.
the invention has the beneficial effects as follows: the organic combination by steel sheet pile and anchor cable reaches the functional effect that bored pile adds soil bolt, easy construction, workable, technique is simple, and in the steel sheet pile Bracing Process, ground works can coordinate support engineering to construct simultaneously, and compare with traditional perfusion lagging pile, steel sheet pile adds the input that the cable bolting system can effectively reduce circulation material, and steel sheet pile can reach recycling by pulling out steel after pit backfill is complete, effectively reduce engineering cost, anchor cable construction intersects with soil excavation and carries out, can form continuous productive process, effective reduction of erection time.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is elaborated.
Foundation pit supporting system job practices of the present invention, it comprises the following steps: one, the foundation ditch surrounding of predetermined excavation according to designing requirement by beating or during the method for vibropiling squeezes into the soil layer of projected depth with steel sheet pile; Two, steel sheet pile construction complete after, return 0.15m-0.2m and adopt full weld weldable steel Guan Liang under steel sheet pile top; Three, after completing, steel Guan Liang construction carries out soil excavation according to the cutting depth layering of design, when digging to projected depth, carry out anchor cable construction, the step of described anchor cable construction is: (a) in the length of foundation pit side-wall according to anchorage cable design, spacing is carried out boring, anchor bar body installation, the grouting construction of anchor cable; (b) be welded to connect adopting between waist rail and steel sheet pile, if between steel sheet pile and waist rail, the gap is arranged, adopt wedge shape steel pad pad firm between the gap, then closely knit with connecting between waist rail, wedge shape steel pad and steel sheet pile, guarantee that steel sheet pile integral body is stressed; (c) during greater than 15MPa, anchor bar body is carried out stretch-draw when anchor bar body intensity, the locking anchor cable.
Embodiment 1
At first, the deep foundation ditch surrounding of predetermined excavation according to designing requirement by beating or during the method for vibropiling squeezes into the soil layer of projected depth with steel sheet pile; Secondly, after steel sheet pile construction is complete, returns 0.15m and adopt full weld weldable steel Guan Liang under steel sheet pile pushes up; At last, after completing, steel Guan Liang construction carries out soil excavation according to the cutting depth layering of design, when digging to projected depth, carry out anchor cable construction, the step of described anchor cable construction is: (a) in the length of deep-foundation side wall according to anchorage cable design, spacing is carried out boring, anchor bar body installation, the grouting construction of anchor cable; (b) be welded to connect adopting between waist rail and steel sheet pile, if between steel sheet pile and waist rail, the gap is arranged, adopt wedge shape steel pad pad firm between the gap, then closely knit with connecting between waist rail, wedge shape steel pad and steel sheet pile, guarantee that steel sheet pile integral body is stressed; (c) during greater than 15MPa, anchor bar body is carried out stretch-draw when anchor bar body intensity, the locking anchor cable.
This method anchor cable construction intersects with soil excavation and carries out, and forms continuous productive process, compares 15 days effective reductions of erection time with conventional method, and steel sheet pile is extracted and reused.
Embodiment 2
At first, the deep foundation ditch surrounding of predetermined excavation according to designing requirement by beating or during the method for vibropiling squeezes into the soil layer of projected depth with steel sheet pile; Secondly, after steel sheet pile construction is complete, returns 0.2m and adopt full weld weldable steel Guan Liang under steel sheet pile pushes up; At last, after completing, steel Guan Liang construction carries out soil excavation according to the cutting depth layering of design, when digging to projected depth, carry out anchor cable construction, the step of described anchor cable construction is: (a) in the length of deep-foundation side wall according to anchorage cable design, spacing is carried out boring, anchor bar body installation, the grouting construction of anchor cable; (b) be welded to connect adopting between waist rail and steel sheet pile, if between steel sheet pile and waist rail, the gap is arranged, adopt wedge shape steel pad pad firm between the gap, then closely knit with connecting between waist rail, wedge shape steel pad and steel sheet pile, guarantee that steel sheet pile integral body is stressed; (c) during greater than 15MPa, anchor bar body is carried out stretch-draw when anchor bar body intensity, the locking anchor cable.
This method anchor cable construction intersects with soil excavation and carries out, and forms continuous productive process, compares 15 days effective reductions of erection time with conventional method, and steel sheet pile is extracted and reused.
Embodiment 3
At first, the deep foundation ditch surrounding of predetermined excavation according to designing requirement by beating or during the method for vibropiling squeezes into the soil layer of projected depth with steel sheet pile; Secondly, after steel sheet pile construction is complete, returns 0.18m and adopt full weld weldable steel Guan Liang under steel sheet pile pushes up; At last, after completing, steel Guan Liang construction carries out soil excavation according to the cutting depth layering of design, when digging to projected depth, carry out anchor cable construction, the step of described anchor cable construction is: (a) in the length of deep-foundation side wall according to anchorage cable design, spacing is carried out boring, anchor bar body installation, the grouting construction of anchor cable; (b) be welded to connect adopting between waist rail and steel sheet pile, if between steel sheet pile and waist rail, the gap is arranged, adopt wedge shape steel pad pad firm between the gap, then closely knit with connecting between waist rail, wedge shape steel pad and steel sheet pile, guarantee that steel sheet pile integral body is stressed; (c) during greater than 15MPa, anchor bar body is carried out stretch-draw when anchor bar body intensity, the locking anchor cable.
This method anchor cable construction intersects with soil excavation and carries out, and forms continuous productive process, compares 12 days effective reductions of erection time with conventional method, and steel sheet pile is extracted and reused.
Claims (1)
1. the foundation pit supporting system job practices, is characterized in that, said method comprising the steps of:
One, the foundation ditch surrounding of predetermined excavation according to designing requirement by beating or during the method for vibropiling squeezes into the soil layer of projected depth with steel sheet pile;
Two, steel sheet pile construction complete after, return 0.15m-0.2m and adopt full weld weldable steel Guan Liang under steel sheet pile top;
Three, after completing, steel Guan Liang construction carries out soil excavation according to the cutting depth layering of design, when digging to projected depth, carry out anchor cable construction, the step of described anchor cable construction is: (a) in the length of foundation pit side-wall according to anchorage cable design, spacing is carried out boring, anchor bar body installation, the grouting construction of anchor cable; (b) be welded to connect adopting between waist rail and steel sheet pile, if between steel sheet pile and waist rail, the gap is arranged, adopt wedge shape steel pad pad firm between the gap, then closely knit with connecting between waist rail, wedge shape steel pad and steel sheet pile, guarantee that steel sheet pile integral body is stressed; (c) during greater than 15MPa, anchor bar body is carried out stretch-draw when anchor bar body intensity, the locking anchor cable.
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| CN2013100634144A CN103132531A (en) | 2013-02-28 | 2013-02-28 | Foundation pit supporting system construction method |
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| CN2013100634144A CN103132531A (en) | 2013-02-28 | 2013-02-28 | Foundation pit supporting system construction method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452120A (en) * | 2013-08-26 | 2013-12-18 | 中冶集团武汉勘察研究院有限公司 | Pile top crown beam structure of high-strength prestress pipe pile for supporting foundation pit and construction method thereof |
| CN104863613A (en) * | 2015-03-04 | 2015-08-26 | 中铁隧道勘测设计院有限公司 | High-side-wall anchored primary support structure for rock strata underground excavation underground structure, and construction method of high-side-wall anchored primary support structure |
| CN111535335A (en) * | 2020-05-27 | 2020-08-14 | 平煤神马建工集团有限公司 | Railway near-edge deep foundation pit supporting method |
| CN111851522A (en) * | 2020-08-05 | 2020-10-30 | 谢珏庭 | Stable sedimentation method for foundation pit construction |
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| CN101906780A (en) * | 2010-07-12 | 2010-12-08 | 中铁四局集团第五工程有限公司 | Method for protecting and reinforcing anchor rope of steel pipe pile |
| CN202090352U (en) * | 2011-05-26 | 2011-12-28 | 昆明二建建设（集团）有限公司 | Deep foundation pit bracing system with steel pipe piles-self-drilling type pre-stress anchor rods |
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| CN102817364A (en) * | 2012-08-22 | 2012-12-12 | 中国建筑第六工程局有限公司 | Construction method for deep foundation pit steel sheet pile and anchor rope timbering system |
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- 2013-02-28 CN CN2013100634144A patent/CN103132531A/en active Pending
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| JP2009084919A (en) * | 2007-10-01 | 2009-04-23 | Kajima Corp | Ground excavating method |
| CN101225661A (en) * | 2008-02-02 | 2008-07-23 | 浙江环宇建设集团有限公司 | Pile-anchor foundation ditch supporting construction method |
| CN101906780A (en) * | 2010-07-12 | 2010-12-08 | 中铁四局集团第五工程有限公司 | Method for protecting and reinforcing anchor rope of steel pipe pile |
| CN202090352U (en) * | 2011-05-26 | 2011-12-28 | 昆明二建建设（集团）有限公司 | Deep foundation pit bracing system with steel pipe piles-self-drilling type pre-stress anchor rods |
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| CN102817364A (en) * | 2012-08-22 | 2012-12-12 | 中国建筑第六工程局有限公司 | Construction method for deep foundation pit steel sheet pile and anchor rope timbering system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452120A (en) * | 2013-08-26 | 2013-12-18 | 中冶集团武汉勘察研究院有限公司 | Pile top crown beam structure of high-strength prestress pipe pile for supporting foundation pit and construction method thereof |
| CN103452120B (en) * | 2013-08-26 | 2015-12-23 | 中冶集团武汉勘察研究院有限公司 | A kind of stake apical cap girder construction of the high-strength Prestressed Pipe Pile for pattern foundation pit supporting structure and construction method thereof |
| CN104863613A (en) * | 2015-03-04 | 2015-08-26 | 中铁隧道勘测设计院有限公司 | High-side-wall anchored primary support structure for rock strata underground excavation underground structure, and construction method of high-side-wall anchored primary support structure |
| CN111535335A (en) * | 2020-05-27 | 2020-08-14 | 平煤神马建工集团有限公司 | Railway near-edge deep foundation pit supporting method |
| CN111851522A (en) * | 2020-08-05 | 2020-10-30 | 谢珏庭 | Stable sedimentation method for foundation pit construction |
| CN111851522B (en) * | 2020-08-05 | 2021-10-01 | 上海九丞岩土科技有限公司 | Stable sedimentation method for foundation pit construction |
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Application publication date: 20130605 |