CN103669365A - External diagonal-pulling and internal diagonal-bracing herringbone foundation pit supporting pile and construction method thereof - Google Patents
External diagonal-pulling and internal diagonal-bracing herringbone foundation pit supporting pile and construction method thereof Download PDFInfo
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Abstract
Provided is an external diagonal-pulling and internal diagonal-bracing herringbone foundation pit supporting pile. The external diagonal-pulling and internal diagonal-bracing herringbone foundation pit supporting pile is characterized by being composed of an internal diagonal-bracing pile, an external diagonal-pulling pile and a top crown beam; the internal diagonal-bracing pile is a reinforced concrete pouring pile or a precast pile which inclines towards the wall of a foundation pit by 10-35 degrees, the diameter of the internal diagonal-bracing pile is 400-1000mm, the length of the internal diagonal-bracing pile is 10-35m, the external diagonal-pulling pile is a wire rope cemented soil rotary jet grouting anchor pile or a reinforced concrete pouring pile which inclines towards the interior of the foundation pit by 20-70 degrees, the diameter of the external diagonal-pulling pile is 200-900mm, the length of the external diagonal-pulling pile is 10-40m, and the internal diagonal-bracing pile and the external diagonal-pulling pile are connected through the top crown beam. Compared with the prior art, the external diagonal-pulling and internal diagonal-bracing herringbone foundation pit supporting pile has the advantages that the construction process is simple, the foundation pit support is stressed more reasonably, the manufacturing cost is lower, the safety degree of the foundation pit is high, no internal support exists in the foundation pit, soil can be largely excavated conveniently, and the pile can be used in soft soil areas of national eastern coastal cities and can also be used in national area with the good soil property.
Description
Technical field
The present invention relates to building foundation engineering field, relate in particular to the chevron shaped foundation pit supporting pile of a kind of outer oblique pull interior leg brace and construction method thereof.
Background technology
As everyone knows, China coast city belongs to soft foundation more, in 20 meters of near surfaces, is mud or mucky soil, in the 1-2 of excavation depth 5-10m layer Basement pit supporting, adopts bored pile to add inner support or diagonal brace as retaining piles more; Or inside and outside two arrange the stiff frame of straight stake along foundation ditch periphery, and though the former is safe and reliable, cost is high, soil excavation is very inconvenient with construction; The latter's cost is low, but foundation pit walls is large to hole intrinsic displacement, and foundation ditch degree of safety is lower.
Summary of the invention
The object of the present invention is to provide the chevron shaped foundation pit supporting pile of a kind of outer oblique pull interior leg brace and construction method thereof, in the pattern foundation pit supporting structure of the waterproof mud that can extensively distribute in China coast city, apply, have that construction technology is simple, pattern foundation pit supporting structure is stressed more rationally, cost is lower, in foundation ditch without inner support and diagonal brace, the hole wall supporting displacement that goes to zero, foundation ditch degree of safety is high, the advantages such as also convenient cubic metre of earth of employing heavy excavation, and basement construction is convenient.
The object of the invention is to be achieved through the following technical solutions: the chevron shaped foundation pit supporting pile of a kind of outer oblique pull interior leg brace, it is characterized in that, chevron shaped foundation pit supporting pile is comprised of interior leg brace stake and outer slope bolt piles and top crown beam, interior leg brace stake is to foundation pit walls inclination 10-35 degree, diameter 400-1000mm, the deposited reinforced concrete pile of the long 10-35m of stake or prefabricated stake, outer slope bolt piles is to the tilted 20-70 degree of foundation ditch, diameter 200-900mm, cable wire cement-soil jet-grouted anchor pile or the deposited reinforced concrete pile of the long 10-40m of stake, diagonal brace stake is connected with the very useful Guan Liang of slope bolt piles stake.Slope bolt piles and diagonal brace stake determine that according to engineering and geological condition stake end does not expand or establishes enlarged footing or rotary churning pile major part or pile bottom post grouting, when foundation depth is larger, establishes two rows slope bolt piles; Prefabricated stake described herein is preformed pile or prestressed pile, and deposited reinforced concrete pile is constructed by Spiral digging machine or immersed tube machine or multi-functional geological drilling rig, and jet-grouted anchor pile is by jet-grouted anchor pile drilling machine construction; Meet casing steel pipe under plastic flow mud, do not collapse and collapse in an assurance stake hole, not necking down.
The construction method of the chevron shaped foundation pit supporting pile of above-mentioned a kind of outer oblique pull interior leg brace, comprises following construction sequence successively:
(A) making of diagonal brace stake and steel concrete slope bolt piles construction:
1. pore-forming: Spiral digging machine or immersed tube (stake) machine or multi-functional geological drilling rig are positioned on stake position, by the Yu Zhuankong inclination angle, aperture of designing requirement, first immersed tube or pore-forming, meet casing steel pipe under plastic flow mud, a design stake end enlarged footing, construction to absolute altitude at the bottom of hole changes reaming bit reaming;
2. put reinforcing cage: in casing steel pipe or along chute, put into reinforcing cage, on reinforcing cage stirrup, be installed with for controlling the fine-stone concrete wheel shape cushion block of reinforcement cover, be designed with pile bottom post grouting, with two for the moment bore as the steel pipe of slip casting, replace two main muscle, and with assembling reinforcement cage after the cloth waste plug mouth of pipe;
3. fill with pile concrete: by existing underwater concrete perfusion rules concrete perfusion;
4. the reinforcing bar that anchors into Guan Liang is reserved on stake top;
5. as prefabricated stake for design, first prefabricated pile body is squeezed in soil by design angle by stake machine on stake position.
(B) making of cable wire cement-soil churning oblique pull anchoring pile construction:
1. jet-grouted anchor pile rig is positioned on the stake position on foundation ditch limit;
2. the three leaf drill bits (bore 15-18cm) by rig creep into projected depth to soil layer water filling;
3. exit drill bit, 2-3 root cable wire is fixed on cable wire dish, at the bottom of heading on cable wire center hole cable wire is delivered to hole by the drilling rod of rig, from aperture, send inward 3-8m simultaneously, with 20MPa high-pressure rotary-spray cement paste, spray limit, limit is entered, stake end gravel layer up and down twice churning form a stake major part; At the bottom of hole, exit the still spray while moving back;
4. the long anchor cable of the reserved 1.5-2m in aperture is made and later stage anchor cable traction stretch-draw as Guan Liang;
(C) make Guan Liang and stretch-draw cable wire: in all diagonal brace stakes and slope bolt piles, constructed, excavate out stake top and Guan Liang position, colligation hat beam steel and pouring hat beam concrete on stake top, wait being preced with beam concrete, reach after some strength, with Special jack stretch-draw cable wire, reach builder's tonnage, put cable wire positioning disk, the cable wire of the unnecessary length of oxyacetylene metal-cutting;
(D) beat the outer dewatering well of foundation ditch: the determining deviation along foundation ditch outside is beaten 300-800mm bore dewatering well, and its degree of depth surpasses the end, hole;
(E) the excavation of foundation pit earthwork, the thick pea gravel concreten of 100mm is sprayed on slope more than Guan Liang, assembling reinforcement net sheet anchor into pile body with dowel on diagonal brace stake inclined-plane, then spray the thick pea gravel concreten of 100mm.
The chevron shaped foundation pit supporting pile of a kind of outer oblique pull interior leg brace compared with prior art, there is following remarkable advantage: construction technology is simple, pattern foundation pit supporting structure is stressed more rationally, cost is lower, foundation ditch degree of safety is high, foundation ditch is interior without inner support, convenient cubic metre of earth heavy excavation, and basement construction advantage easily, can not only use in the soft clay area in Deposits in Eastern Coastal China city, Ye Neng China soil property preferably area is used.
Accompanying drawing explanation
Fig. 1 is that slope bolt piles of the present invention is the generalized section of cable wire cement-soil jet-grouted anchor pile.
Fig. 2 is that slope bolt piles of the present invention is the generalized section of deposited reinforced concrete pile.
In figure: 1. steel concrete perfusion diagonal brace stake, 2. reinforcing cage, 3. fine-stone concrete steel mesh reinforcement and pile body joint bar link, 4. cable traction positioning disk, 5. Guan Liang, 6.100 thick fine-stone concrete, 7. gutter, 8. dewatering well, 9. miscellaneous fill, 10. cable wire, 11. cable wire cement-soil churning slope bolt piles, 12. silt clay, 13. muds, 14. end churning major parts, 15. ovum gravel beds, 16. clays, 17. slope bolt piles inclination angles, 18. foundation pit walls plumb lines, 19. diagonal brace stake inclination angle, 20. stake end enlarged footing, 21. foundation ditch bottom surfaces, 22. rubble bed courses, 23.C10 concrete bed course, 24. basement bottom boards, 25. gutters, 26. underground indoor and outdoor walls, 27. steel concrete perfusion slope bolt piles.
The specific embodiment
An exemplary embodiments of the present invention, as Fig. 1,
(a) Spiral digging machine is positioned on the stake position of foundation ditch, by the Yu Zhuankong inclination angle, aperture (19) of designing requirement, first pore-forming, casing steel pipe under plastic flow mud, and at stake end enlarged footing (20); In casing steel pipe, put into reinforcing cage (2), on reinforcing cage (2) stirrup, be installed with for controlling the fine-stone concrete wheel shape cushion block of reinforcement cover, by underwater concrete perfusion rules concrete perfusion, the reserved reinforcing bar that anchors into Guan Liang in stake top;
(b) jet-grouted anchor pile rig is positioned on the stake position on foundation ditch limit, by the three leaf drill bits (bore 15-18cm) of rig to soil layer (9), (12), (13), (15) with design angle (17) water filling, creep into projected depth, exit drill bit, 2 cable wires (10) are fixed on cable wire dish, drilling rod by rig heads on cable wire center hole, at the bottom of cable wire (10) is delivered to hole, from aperture, send inward 6m simultaneously, with 20MPa high-pressure rotary-spray cement paste, spray limit, limit is entered, stake end gravel layer (15) up and down twice churning form a stake major part (14), at the bottom of hole, exit again, the still spray while moving back, the long cable wire (10) of the reserved 1.5-2m in aperture is made and later stage cable wire (10) traction stretch-draw as Guan Liang (5),
(c) at all diagonal brace stakes (1) and slope bolt piles (11), construct complete, excavate out stake top and Guan Liang (5) position, colligation Guan Liang (5) reinforcing bar and pouring Guan Liang (5) concrete on stake top, until Guan Liang (5) concrete, reach after some strength, with Special jack stretch-draw cable wire (10), reach builder's tonnage, put cable wire positioning disk (4), the cable wire of the unnecessary length of oxyacetylene metal-cutting (10);
(d) along a determining deviation in foundation ditch outside, beat 500mm bore dewatering well (8), its degree of depth surpasses hole end 4m;
(e) the excavation of foundation pit earthwork, the thick pea gravel concreten of 100mm (6) is sprayed on slope more than Guan Liang (5), assembling reinforcement net sheet anchor into pile body with dowel on diagonal brace stake (1) inclined-plane, spray again the thick pea gravel concreten of 100mm (3), excavation gutter (7), foundation ditch outside, pit earthwork digs to bottom surface (21), hole, spread successively rubble bed course (22), C10 concrete bed course (23), then water basement bottom board (24) and underground indoor and outdoor wall (26) and gutter (25).
Claims (2)
1. the chevron shaped foundation pit supporting pile of outer oblique pull interior leg brace, it is characterized in that, chevron shaped foundation pit supporting pile is comprised of interior leg brace stake and outer slope bolt piles and top crown beam, interior leg brace stake is to the deposited reinforced concrete pile of foundation pit walls inclination 10-35 degree, diameter 400-1000mm, the long 10-35m of stake or prefabricated stake, outer slope bolt piles is to the tilted 20-70 degree of foundation ditch, diameter 200-900mm, cable wire cement-soil jet-grouted anchor pile or the deposited reinforced concrete pile of the long 10-40m of stake, diagonal brace stake is connected with the very useful Guan Liang of slope bolt piles stake.
2. the construction method of the chevron shaped foundation pit supporting pile of outer oblique pull interior leg brace, comprises following construction sequence successively:
(A) making of diagonal brace stake and steel concrete slope bolt piles construction:
1. pore-forming: Spiral digging machine or immersed tube (stake) machine or multi-functional geological drilling rig are positioned on stake position, by the Yu Zhuankong inclination angle, aperture of designing requirement, first immersed tube or pore-forming, meet casing steel pipe under plastic flow mud, a design stake end enlarged footing, construction to absolute altitude at the bottom of hole changes reaming bit reaming;
2. put reinforcing cage: in casing steel pipe or along chute, put into reinforcing cage, on reinforcing cage stirrup, be installed with for controlling the fine-stone concrete wheel shape cushion block of reinforcement cover, be designed with pile bottom post grouting, with two for the moment bore as the steel pipe of slip casting, replace two main muscle, and with assembling reinforcement cage after the cloth waste plug mouth of pipe;
3. fill with pile concrete: by existing underwater concrete perfusion rules concrete perfusion;
4. the reinforcing bar that anchors into Guan Liang is reserved on stake top;
5. as prefabricated stake for design, first prefabricated pile body is squeezed in soil by design angle by stake machine on stake position.
(B) making of cable wire cement-soil churning oblique pull anchoring pile construction:
1. jet-grouted anchor pile rig is positioned on the stake position on foundation ditch limit;
2. the three leaf drill bits (bore 15-18cm) by rig creep into projected depth to soil layer water filling;
3. exit drill bit, 2-3 root cable wire is fixed on cable wire dish, at the bottom of heading on cable wire center hole cable wire is delivered to hole by the drilling rod of rig, from aperture, send inward 3-8m simultaneously, with 20MPa high-pressure rotary-spray cement paste, spray limit, limit is entered, stake end gravel layer up and down twice churning form a stake major part; At the bottom of hole, exit the still spray while moving back;
4. the long anchor cable of the reserved 1.5-2m in aperture is made and later stage anchor cable traction stretch-draw as Guan Liang;
(C) make Guan Liang and stretch-draw cable wire: in all diagonal brace stakes and slope bolt piles, constructed, excavate out stake top and Guan Liang position, colligation hat beam steel and pouring hat beam concrete on stake top, wait being preced with beam concrete, reach after some strength, with Special jack stretch-draw cable wire, reach builder's tonnage, put cable wire positioning disk, the cable wire of the unnecessary length of oxyacetylene metal-cutting, completes making and the construction of the chevron shaped foundation pit supporting pile of all outer oblique pull interior leg braces.
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| CN201210327266.8A CN103669365A (en) | 2012-08-29 | 2012-08-29 | External diagonal-pulling and internal diagonal-bracing herringbone foundation pit supporting pile and construction method thereof |
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| CN201210327266.8A CN103669365A (en) | 2012-08-29 | 2012-08-29 | External diagonal-pulling and internal diagonal-bracing herringbone foundation pit supporting pile and construction method thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104647583A (en) * | 2015-02-16 | 2015-05-27 | 中交第二航务工程局有限公司 | Immersed-tube prefabricated outer wall support |
| CN105239586A (en) * | 2015-11-05 | 2016-01-13 | 云南建工集团有限公司 | Support structure for supporting foundation pit and method for supporting foundation pit |
| CN105442615A (en) * | 2015-11-26 | 2016-03-30 | 中国建筑股份有限公司 | Inverted-Y-shaped supporting structure for foundation pit engineering and construction method of inverted-Y-shaped supporting structure |
| CN107677498A (en) * | 2017-11-02 | 2018-02-09 | 中国建筑第八工程局有限公司 | The simulation test device and method of the stake soil support combination supporting system mechanism of action |
| CN108277808A (en) * | 2017-01-05 | 2018-07-13 | 上海城地建设股份有限公司 | Support, anchor cable post-tensioning H-type component building enclosure and its application process before a kind of steel pipe |
| CN108385692A (en) * | 2018-01-18 | 2018-08-10 | 武汉中力岩土工程有限公司 | Deep basal pit shear connector support system |
| CN108867658A (en) * | 2018-07-18 | 2018-11-23 | 江苏东合南岩土科技股份有限公司 | Tilt piling bar foundation pit supporting construction and construction method |
| WO2019104924A1 (en) * | 2017-12-01 | 2019-06-06 | 徐少钢 | Portable mechanically assembled ground fixation stake device |
| CN110029673A (en) * | 2019-04-16 | 2019-07-19 | 潮峰钢构集团有限公司 | Anchor cable drilling pilework and its enclosing method suitable for Extra-Deep Foundation Pit |
| CN110644497A (en) * | 2019-09-18 | 2020-01-03 | 长安大学 | Soft soil foundation deep foundation pit supporting device |
| CN111733878A (en) * | 2020-07-09 | 2020-10-02 | 济南城建集团有限公司 | Full-prefabricated assembled superposed comprehensive pipe gallery supporting construction structure and process |
| CN111851539A (en) * | 2020-08-27 | 2020-10-30 | 北交智汇千路(北京)科技有限公司 | Groove type anti-slide pile for slope structure safety and construction method thereof |
| CN112459078A (en) * | 2020-11-11 | 2021-03-09 | 中国建筑第二工程局有限公司 | Construction method of foundation pit supporting system |
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Cited By (18)
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|---|---|---|---|---|
| CN104647583A (en) * | 2015-02-16 | 2015-05-27 | 中交第二航务工程局有限公司 | Immersed-tube prefabricated outer wall support |
| CN105239586A (en) * | 2015-11-05 | 2016-01-13 | 云南建工集团有限公司 | Support structure for supporting foundation pit and method for supporting foundation pit |
| CN105239586B (en) * | 2015-11-05 | 2017-04-12 | 云南省建设投资控股集团有限公司 | Method for supporting foundation pit by adopting support structure |
| CN105442615A (en) * | 2015-11-26 | 2016-03-30 | 中国建筑股份有限公司 | Inverted-Y-shaped supporting structure for foundation pit engineering and construction method of inverted-Y-shaped supporting structure |
| CN108277808A (en) * | 2017-01-05 | 2018-07-13 | 上海城地建设股份有限公司 | Support, anchor cable post-tensioning H-type component building enclosure and its application process before a kind of steel pipe |
| CN107677498A (en) * | 2017-11-02 | 2018-02-09 | 中国建筑第八工程局有限公司 | The simulation test device and method of the stake soil support combination supporting system mechanism of action |
| CN107677498B (en) * | 2017-11-02 | 2023-10-03 | 中国建筑第八工程局有限公司 | Simulation test device and method for action mechanism of pile-soil-support combined support system |
| WO2019104924A1 (en) * | 2017-12-01 | 2019-06-06 | 徐少钢 | Portable mechanically assembled ground fixation stake device |
| US11242664B2 (en) | 2017-12-01 | 2022-02-08 | Shaogang XU | Portable mechanically assembled ground fixation stake device |
| CN108385692A (en) * | 2018-01-18 | 2018-08-10 | 武汉中力岩土工程有限公司 | Deep basal pit shear connector support system |
| CN108867658A (en) * | 2018-07-18 | 2018-11-23 | 江苏东合南岩土科技股份有限公司 | Tilt piling bar foundation pit supporting construction and construction method |
| CN110029673A (en) * | 2019-04-16 | 2019-07-19 | 潮峰钢构集团有限公司 | Anchor cable drilling pilework and its enclosing method suitable for Extra-Deep Foundation Pit |
| CN110029673B (en) * | 2019-04-16 | 2023-10-13 | 潮峰钢构集团有限公司 | Anchor cable bored pile structure suitable for deep foundation pit support and support method thereof |
| CN110644497A (en) * | 2019-09-18 | 2020-01-03 | 长安大学 | Soft soil foundation deep foundation pit supporting device |
| CN110644497B (en) * | 2019-09-18 | 2021-05-04 | 长安大学 | Soft soil foundation deep foundation pit supporting device |
| CN111733878A (en) * | 2020-07-09 | 2020-10-02 | 济南城建集团有限公司 | Full-prefabricated assembled superposed comprehensive pipe gallery supporting construction structure and process |
| CN111851539A (en) * | 2020-08-27 | 2020-10-30 | 北交智汇千路(北京)科技有限公司 | Groove type anti-slide pile for slope structure safety and construction method thereof |
| CN112459078A (en) * | 2020-11-11 | 2021-03-09 | 中国建筑第二工程局有限公司 | Construction method of foundation pit supporting system |
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