CN103132531A - Foundation pit supporting system construction method - Google Patents

Foundation pit supporting system construction method Download PDF

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Publication number
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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CN
China
Prior art keywords
steel sheet
construction
sheet pile
steel
anchor
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Pending
Application number
CN2013100634144A
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Chinese (zh)
Inventor
骆长文
骆英
文华忠
刘栩
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.)
SICHUAN CHANGYUAN BUILDING ENGINEERING Co Ltd
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SICHUAN CHANGYUAN BUILDING ENGINEERING 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 SICHUAN CHANGYUAN BUILDING ENGINEERING Co Ltd filed Critical SICHUAN CHANGYUAN BUILDING ENGINEERING Co Ltd
Priority to CN2013100634144A priority Critical patent/CN103132531A/en
Publication of CN103132531A publication Critical patent/CN103132531A/en
Pending legal-status Critical Current

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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

The foundation pit supporting system job practices
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.
CN2013100634144A 2013-02-28 2013-02-28 Foundation pit supporting system construction method Pending CN103132531A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
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

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JP2009084919A (en) * 2007-10-01 2009-04-23 Kajima Corp Ground excavating 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
CN102493459A (en) * 2011-11-24 2012-06-13 天津二十冶建设有限公司 Building isolation support construction method for constructing deep foundation in narrow environment
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN102493459A (en) * 2011-11-24 2012-06-13 天津二十冶建设有限公司 Building isolation support construction method for constructing deep foundation in narrow environment
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 (5)

* Cited by examiner, † Cited by third party
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

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Application publication date: 20130605

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