CN104278671A - Inverted cup-shaped steel drum inserted stiff soil cement stirring retaining pile and construction method thereof - Google Patents
Inverted cup-shaped steel drum inserted stiff soil cement stirring retaining pile and construction method thereof Download PDFInfo
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- CN104278671A CN104278671A CN201410591351.4A CN201410591351A CN104278671A CN 104278671 A CN104278671 A CN 104278671A CN 201410591351 A CN201410591351 A CN 201410591351A CN 104278671 A CN104278671 A CN 104278671A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- Engineering & Computer Science (AREA)
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses an inverted cup-shaped steel drum inserted stiff soil cement stirring retaining pile and a construction method thereof. Soil cement of the stirring pile is arranged in an inserted inverted cup-shaped steel drum, the stress state of the soil cement is changed as the soil cement is sealed in the steel drum, a one-way stretch bending stress state of soil cement on the outer side of H steel in a traditional construction method is changed into a three-way pressing state of the soil cement in the cup-shaped steel drum, and thus the characteristic that the compressive strength of the soil cement is greatly higher than the tensile strength and the shear strength of the soil cement can be brought into full play. According to the stiff soil cement stirring retaining pile disclosed by the invention, the lateral rigidity of a pile formed by a traditional soil mixing wall (SMW) construction method is greatly improved, the defect of small lateral rigidity of the pile formed by the traditional SMW construction method is overcome, the characteristics of high water stop performance, high construction speed, high economical efficiency brought by recyclability of steel and the like in the prior art are inherited, and the retaining pile is suitable for a supporting structure of foundation pit engineering of soft soil, floury soil or silt strata with high excavation depth and high underground water level.
Description
Technical field
The present invention relates to a kind of stiffness Soil-cement soldier pile and the construction method thereof of inserting inverted cup shaped steel bucket, belong to geotechnical engineering Base hole supporting technology field.Be applicable to cutting depth, groundwater table buries shallow base pit engineering space enclosing structure, especially more aobvious advantage under the geological conditions such as weak clay, silt that water content is high.
Background technology
In cement mixing method, insert the section bars such as steel pipe, i iron, H profile steel and form Rigid cable, general this kind of pile forming method is called SMW engineering method, and this kind of stake also claims the stake of SMW engineering method.SMW is the abbreviation of Soil Mixing Wall.The stake of SMW engineering method in 1976 at Japan, the stake of SMW engineering method bores pick mixer with fountain type to carry out brill pick to certain depth at the scene, simultaneously at drill bit place ejection cement system hardening agent with foundation soil mix and blend repeatedly, overlapping lapping construction is then taked between each construction cell, then do not tie firmly at cement-soil mixture and insert section bar as its stress reinforcing material, hard to cement knot, just formed and there is some strength and rigidity, continuous whole, jointless stake formula underground wall body together.Its advantage has: the features such as construction disturbance is little, barrier properties good, place strong adaptability, variable thickness, construction is convenient, excavation spoir amount is little, interpolation steel reusable edible good economy performance.But, the stake of tradition SMW engineering method is in the application of foundation pit supporting construction, its lateral rigidity is born primarily of the section bar inserted, and cement mixing method is as flexible pile or Half rigid pile almost its lateral rigidity of illegal consideration contribution, therefore horizontal distortion is comparatively large in the practical application of traditional SMW engineering method stake, this is also the bottleneck that this engineering method is applied in complicated base pit engineering.
In foundation pit supporting construction, soldier pile is deformed into master with level of control, so the core improving soldier pile service behaviour is exactly to improve the lateral rigidity of pile body under the prerequisite of certain economy with construction convenience.For the stake of SMW engineering method, if only rely on the lateral rigidity that the rigidity improving section bar improves whole compound pile body, then will sharply increase with steel cost, pile body section also will expand, and its economy certainly will be made to reduce for this and difficulty of construction increases.So in sum, the service behaviour core that improve the stake of SMW engineering method mainly should improve from taking effective way or play the lateral rigidity of cement mixing method.
Summary of the invention
Technical problem: the object of the invention is to provide a kind of stiffness Soil-cement soldier pile and the construction method thereof of inserting inverted cup shaped steel bucket, on the thinking basis of traditional SMW engineering method stake, change the section bar that original generality is inserted, change into by large-diameter circular steel pipe or H profile steel and Plate Welding and circular or square cup type steel drum as the reinforcing body of Rigid cable, then before after cement system hardening agent and the soil body stir repeatedly, cement system hardening agent hardens, cup type steel drum is inverted and comes, to allow at the bottom of closed cup upwards, the rim of a cup of opening is downward, insert in cement mixing method.When keeping smoothly inserting for ensureing to insert, steel drum inner and outer air pressure is consistent, at the bottom of cup type steel drum bucket, arrange air vent.After pile, the follow-up practice of base pit engineering and working procedure are all consistent with other supporting pile-type base pit engineering.The cement-soil of agitation pile is placed in steel drum inside by this insertion inverted cup shaped steel bucket, the steel drum internal water earth unidirectional stretch bending stress be placed in traditional engineering method outside H profile steel is made to become the three dimension stress state of steel drum inside, this has given full play to the characteristic of Compressive Strength of Soil-cement Mixture much larger than tension, shear strength, and this will significantly improve the lateral rigidity of cement mixing pile.
Technical scheme: structural shape and the construction method thereof of inserting the stiffness Soil-cement soldier pile of inverted cup shaped steel bucket, its architectural feature comprises major diameter cup type steel drum side cup type steel drum, circle cup type steel drum, cement-soil mixing pile, stake apical cap beam, internal support of foundation pit.Cup type steel drum stiffness Soil-cement soldier pile can according to construction condition, respectively can the side's of being made into cup type steel drum and circle cup type steel drum two kinds of steel drum forms.
Wherein, side's cup type steel drum is by two vertical spacing side by side fixed ranges of H profile steel, adopt two sidewall steel plate to adopt soldered to couple together on the edge of a wing of two H profile steel and form steel drum bucket wall, steel drum top adopts square sealing steel plate to adopt soldered to be closed at steel drum top, and leaving steam vent, above-mentioned component couples together the side's of constituting cup type steel drum.Side's cup type steel drum is squeezed in insertion Soil-cement pile body before cement-soil stirring pile construction is complete, cement-soil is unhardened, the side's of being formed cup type steel drum stiffness Soil-cement soldier pile after cement-soil sclerosis.
Circle cup type steel drum can be formed by shown in Fig. 3 and Fig. 4: circular steel drum bucket wall is made up of large diameter round steel pipe, steel drum top adopts circular sealing steel plate to adopt soldered to be closed at steel drum top, and reserve steam vent at the center of circular hush panel, above-mentioned component couples together and forms circle cup type steel drum.Circle cup type steel drum is squeezed in insertion Soil-cement pile body before cement-soil stirring pile construction is complete, cement-soil is unhardened, forms circle cup type steel drum stiffness Soil-cement soldier pile after cement-soil sclerosis.
Major diameter cup type steel drum stiffness Soil-cement soldier pile is at the application characteristic of base pit engineering as horizontal supporting structure system: bore pick mixer with fountain type and carry out brill pick to underground certain depth at the scene, simultaneously at drill bit place ejection cement system hardening agent and foundation soil mix and blend repeatedly, overlapping lapping construction is then taked between each construction cell, then cement-soil mixture do not tie hard before insertion major diameter cup type steel drum as its stress reinforcing body and bucket in cement-soil deformation failure obligatory point, hard to cement knot, just formed be made up of major diameter cup type steel drum stiffness Soil-cement supporting pile group there is some strength and rigidity, continuous whole, jointless underground wall body.The arrangement pitch that the horizontal rigidity of underground wall body can be inserted in Soil-cement pile group body of wall by cup type steel drum diameter and cup type steel drum controlled.The link position of the support unit (stake apical cap beam, inner support) of the underground wall body that major diameter cup type steel drum stiffness Soil-cement soldier pile is formed and other pattern foundation pit supporting structure, consistent with the pattern of other foundation pit supporting construction such as common diaphragm wall, SMW engineering method; Reinforcing bar in other support unit or connector after knocking out the cement-soil topping of link position, directly can weld with cup type steel drum reserved location by connected mode.
The stiffness Soil-cement soldier pile work progress inserting inverted cup shaped steel bucket mainly comprises the steps:
The first step: construction cement-soil mixing pile;
Second step: major diameter cup type steel drum Site Welding is shaping;
3rd step: smear interleaving agent inside and outside cup type steel drum;
4th step: guide frame and hanging beam that the insertion of cup type steel drum is set;
5th step: control vertically vertically to insert inverted major diameter cup type steel drum in cement mixing method through the correction of transit deviational survey before cement-soil is unhardened, completes the underground wall body construction of foundation pit enclosure structure;
6th step: construct at underground wall body top and build an apical cap beam, arranges construction groove in the closed envelope inner excavation inner support of underground wall body, and inner support of constructing, finally apply inner support and weld with the connector of cup type steel drum;
7th step: soil excavation in foundation ditch, completes building underground structure main body construction;
8th step: remove inner support and stake apical cap beam;
9th step: smear interleaving agent inside and outside thermoplastic cup type steel drum, arranges guide frame and hanging beam that cup type steel drum extracts, extracts the cup type steel drum in cement mixing pile;
Tenth step: Foundation Pit Construction is complete;
Beneficial effect: the present invention adopts above technical scheme, possesses following advantage compared with prior art: the stress changing cement-soil by cement-soil being enclosed in steel drum inside, significantly improve its overall lateral rigidity, the stagnant water effect simultaneously having taken into account the stake of traditional SMW engineering method is good, construction method is quick, practicality cheap, capable of circulation, have gear soil and water stopping function concurrently, solves the problem that in the practical application of traditional SMW engineering method stake, horizontal distortion is larger.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and case study on implementation, the invention will be further described.
Fig. 1 is the pile body schematic cross-sectional view of the stiffness Soil-cement soldier pile inserting inversion side's cup type steel drum;
Fig. 2 is the axial cross-sectional schematic of pile body of the stiffness Soil-cement soldier pile inserting inversion side's cup type steel drum;
Fig. 3 is the pile body schematic cross-sectional view inserting the stiffness Soil-cement soldier pile being inverted circle cup type steel drum;
Fig. 4 is the axial cross-sectional schematic of pile body inserting the stiffness Soil-cement soldier pile being inverted circle cup type steel drum.
Have in above figure: cement-soil mixing pile 1, H profile steel 2, square sealing steel plate 3, sidewall steel plate 4, soldered 5, steam vent 6, round steel pipe 7, circular sealing steel plate 8.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in detail:
A kind of stiffness Soil-cement soldier pile inserting inverted cup shaped steel bucket of the present invention, its form of structure is according to accompanying drawing, and the stiffness cement-soil soldier pile of large diameter cup type steel drum carries out the making of pile body according to accompanying drawing.Cup type steel drum stiffness Soil-cement soldier pile can according to construction condition, respectively can the side's of being made into cup type steel drum and circle cup type steel drum two kinds of steel drum forms.
Wherein, side's cup type steel drum can be formed by shown in Fig. 1 and Fig. 2: by the vertical spacing side by side fixed range of two H profile steel 2, adopt two sidewall steel plate 4 to adopt soldered 5 to couple together on the edge of a wing of two H profile steel 2 and form steel drum bucket wall, steel drum top adopts square sealing steel plate 3 to adopt soldered 5 to be closed at steel drum top, and leaving steam vent 6, above-mentioned component couples together the side's of constituting cup type steel drum.Side's cup type steel drum is squeezed in insertion Soil-cement pile body before cement-soil stirring pile construction is complete, cement-soil is unhardened, the side's of being formed cup type steel drum stiffness Soil-cement soldier pile after cement-soil sclerosis.
Circle cup type steel drum can be formed by shown in Fig. 3 and Fig. 4: circular steel drum bucket wall is made up of large diameter round steel pipe 7, steel drum top adopts circular sealing steel plate 8 to adopt soldered 5 to be closed at steel drum top, and reserve steam vent 6 at the center of circular hush panel 8, above-mentioned component couples together and forms circle cup type steel drum.Circle cup type steel drum is squeezed in insertion Soil-cement pile body before cement-soil stirring pile construction is complete, cement-soil is unhardened, forms circle cup type steel drum stiffness Soil-cement soldier pile after cement-soil sclerosis.
Major diameter cup type steel drum stiffness Soil-cement soldier pile is at the application characteristic of base pit engineering as horizontal supporting structure system: bore pick mixer with fountain type and carry out brill pick to underground certain depth at the scene, simultaneously at drill bit place ejection cement system hardening agent and foundation soil mix and blend repeatedly, overlapping lapping construction is then taked between each construction cell, then cement-soil mixture do not tie hard before insertion major diameter cup type steel drum as its stress reinforcing body and bucket in cement-soil deformation failure obligatory point, hard to cement knot, just formed be made up of major diameter cup type steel drum stiffness Soil-cement supporting pile group there is some strength and rigidity, continuous whole, jointless underground wall body.The arrangement pitch that the horizontal rigidity of underground wall body can be inserted in Soil-cement pile group body of wall by cup type steel drum diameter and cup type steel drum controlled.The link position of the support unit (stake apical cap beam, inner support) of the underground wall body that major diameter cup type steel drum stiffness Soil-cement soldier pile is formed and other pattern foundation pit supporting structure, consistent with the pattern of other foundation pit supporting construction such as common diaphragm wall, SMW engineering method; Reinforcing bar in other support unit or connector after knocking out the cement-soil topping of link position, directly can weld with cup type steel drum reserved location by connected mode.
The stiffness Soil-cement soldier pile work progress inserting inverted cup shaped steel bucket mainly comprises the steps:
The first step: construction cement-soil mixing pile;
Second step: major diameter cup type steel drum Site Welding is shaping;
3rd step: smear interleaving agent inside and outside cup type steel drum;
4th step: guide frame and hanging beam that the insertion of cup type steel drum is set;
5th step: control vertically vertically to insert inverted major diameter cup type steel drum in cement mixing method through the correction of transit deviational survey before cement-soil is unhardened, completes the underground wall body construction of foundation pit enclosure structure;
6th step: construct at underground wall body top and build an apical cap beam, arranges construction groove in the closed envelope inner excavation inner support of underground wall body, and inner support of constructing, finally apply inner support and weld with the connector of cup type steel drum;
7th step: soil excavation in foundation ditch, completes building underground structure main body construction;
8th step: remove inner support and stake apical cap beam;
9th step: smear interleaving agent inside and outside thermoplastic cup type steel drum, arranges guide frame and hanging beam that cup type steel drum extracts, extracts the cup type steel drum in cement mixing pile;
Tenth step: Foundation Pit Construction is complete.
Claims (2)
1. insert a stiffness Soil-cement soldier pile for inverted cup shaped steel bucket, according to construction condition, the side's of being made into cup type steel drum or circle cup type steel drum two kinds of steel drum forms, its architectural feature is:
Side's cup type steel drum is by the vertical spacing side by side fixed range of two H profile steel (2), adopt two sidewall steel plate (4) to be adopted on the edge of a wing of two H profile steel (2) and be welded to connect formation side's cup type steel drum bucket wall, steel drum top adopts square sealing steel plate (3) by steel drum top seal, and leaving steam vent (6), above-mentioned component couples together the side's of constituting cup type steel drum; Side's cup type steel drum is squeezed in insertion Soil-cement pile body before cement-soil stirring pile construction is complete, cement-soil is unhardened, the side's of being formed cup type steel drum stiffness Soil-cement soldier pile after cement-soil sclerosis;
Circle cup type steel drum wall is made up of large diameter round steel pipe (7), round steel pipe (7) top adopts circular sealing steel plate (8) to be got up by top seal, and reserve steam vent (6) at the center of circular hush panel (8), above-mentioned component couples together and forms circle cup type steel drum; Circle cup type steel drum is squeezed in insertion Soil-cement pile body before cement-soil stirring pile construction is complete, cement-soil is unhardened, forms circle cup type steel drum stiffness Soil-cement soldier pile after cement-soil sclerosis.
2. a kind of construction method inserting the stiffness Soil-cement soldier pile of inverted cup shaped steel bucket according to claim 1, is characterized in that:
The first step: construction cement-soil mixing pile;
Second step: major diameter cup type steel drum Site Welding is shaping;
3rd step: smear interleaving agent inside and outside cup type steel drum;
4th step: guide frame and hanging beam that the insertion of cup type steel drum is set;
5th step: control vertically vertically to insert inverted major diameter cup type steel drum in cement mixing method through the correction of transit deviational survey before cement-soil is unhardened, completes the underground wall body construction of foundation pit enclosure structure;
6th step: construct at underground wall body top and build an apical cap beam, arranges construction groove in the closed envelope inner excavation inner support of underground wall body, and inner support of constructing, finally apply inner support and weld with the connector of cup type steel drum;
7th step: soil excavation in foundation ditch, completes building underground structure main body construction;
8th step: remove inner support and stake apical cap beam;
9th step: smear interleaving agent inside and outside thermoplastic cup type steel drum, arranges guide frame and hanging beam that cup type steel drum extracts, extracts the cup type steel drum in cement mixing pile;
Tenth step: Foundation Pit Construction is complete.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410591351.4A CN104278671B (en) | 2014-10-28 | 2014-10-28 | Insert stiffness Soil-cement soldier pile and the construction method thereof of inverted cup shaped steel bucket |
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| CN201410591351.4A CN104278671B (en) | 2014-10-28 | 2014-10-28 | Insert stiffness Soil-cement soldier pile and the construction method thereof of inverted cup shaped steel bucket |
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| CN104278671B CN104278671B (en) | 2016-01-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106088102A (en) * | 2016-06-22 | 2016-11-09 | 南京工业大学 | Lattice combined steel plate pile cement-soil composite pile and construction method thereof |
| CN108343052A (en) * | 2017-12-21 | 2018-07-31 | 上海市政工程设计研究总院（集团）有限公司 | A kind of steel Guan Liang and its installation method for SMW engineering methods |
| CN109339060A (en) * | 2018-11-07 | 2019-02-15 | 上海市基础工程集团有限公司 | For the rectangle steel case and construction method in equal thickness Soil-cement Wall |
| CN113309113A (en) * | 2021-05-28 | 2021-08-27 | 江苏省华建建设股份有限公司 | Support method for deep foundation pit of urban building |
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| CN106088102A (en) * | 2016-06-22 | 2016-11-09 | 南京工业大学 | Lattice combined steel plate pile cement-soil composite pile and construction method thereof |
| CN108343052A (en) * | 2017-12-21 | 2018-07-31 | 上海市政工程设计研究总院（集团）有限公司 | A kind of steel Guan Liang and its installation method for SMW engineering methods |
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| CN113309113A (en) * | 2021-05-28 | 2021-08-27 | 江苏省华建建设股份有限公司 | Support method for deep foundation pit of urban building |
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