CN104532855B - A kind of built pile supporting construction in deep peat swamps evolution - Google Patents
A kind of built pile supporting construction in deep peat swamps evolution Download PDFInfo
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- CN104532855B CN104532855B CN201410846440.9A CN201410846440A CN104532855B CN 104532855 B CN104532855 B CN 104532855B CN 201410846440 A CN201410846440 A CN 201410846440A CN 104532855 B CN104532855 B CN 104532855B
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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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- General Engineering & Computer Science (AREA)
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- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
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Abstract
The invention discloses the built pile supporting construction in a kind of deep peat swamps evolution, belongs to architecture Foundation Pit Engineering technical field.The present invention is made up of front-seat rotary churning pile, heel row rotary churning pile, cast-in-situ bored pile and Guan Liang.First with cement-bentonite grout as injecting paste material, rotary churning pile front row rotary churning pile and heel row jet grouting pile construction is carried out, and it is arranged in parallel to ensure that two row's rotary churning piles are mutually twisted, formed water-stop curtain and improve cumulosol engineering characteristic；After the pile body of rotary churning pile tends towards stability, along the center line of two row's rotary churning piles, bored pile construction is carried out；Guan Liang is set in apical position finally, front-seat rotary churning pile, heel row rotary churning pile and three campshed of cast-in-situ bored pile are connected into an entirety, constitute the built pile supporting construction in thick peat swamps evolution.Hole quality difference and a concrete fullness coefficient excessive difficult problem when present invention can effectively overcome cast-in-situ bored pile to construct in deep peat swamps evolution, it is ensured that cast-in-situ bored pile pile quality, and reduce construction costs.
Description
Technical field
The present invention relates to the built pile supporting in a kind of built pile supporting construction, more particularly to a kind of deep peat swamps evolution
Structure, belongs to architecture Foundation Pit Engineering technical field.
Background technology
With expanding economy, urban construction is constantly expanded and shifts from downtown to surrounding suburb, and inner city can profit
Land resource is less and less, and many engineerings inevitably will be built on soft soil foundation.The widely distributed weak soil of China has
Mud, muck soil, peat and cumulosol etc..At present to Soft Soil Engineering Quality Research just for mud and Muddy Bottoms
Soil, and to cumulosol Quality Research and few.The engineering properties of cumulosol is poor, is mainly shown as the content of organic matter
High, void ratio is big, water content is high, natural density is little, compressibility is high, shearing strength is low, structural strong and sensitivity is high, consolidation slowly
Deng.For the base pit engineering in deep peat swamps evolution, would generally face during bored pile construction hole quality difference and
The excessive difficult problem of concrete fullness coefficient, construction costs are high, cause very big waste.Traditional construction method has certain office
Sex-limited.
Content of the invention
It is an object of the invention to overcoming construction Difficulties of the cast-in-situ bored pile in deep peat swamps evolution, there is provided Yi Zhongneng
In base pit engineering under the deep cumulosol geological environment of effectively solving, drilling pouring pile hole is of poor quality and concrete fills system
The excessive built pile supporting construction for waiting construction problem of number.
The technical scheme is that：Built pile supporting construction in deep peat swamps evolution is by front-seat rotary churning pile（1）, heel row
Rotary churning pile（2）, cast-in-situ bored pile（3）And Guan Liang（4）Composition, it is characterised in that：First with cement-bentonite grout as injecting paste material,
Carry out rotary churning pile front row rotary churning pile（1）With heel row rotary churning pile（2）Construction, and ensure to be mutually twisted between two row's rotary churning piles and per beating
All arranged in parallel, the water-stop curtain of at least two row's rotary churning piles is formed, improves cumulosol engineering characteristic；Treat before and after's rotary churning pile（1、
2）Pile body tend towards stability after, along the center line of two row's rotary churning piles, carry out cast-in-situ bored pile（3）Construction；Finally in front and back's churning
Stake（1、2）And cast-in-situ bored pile（3）Apical position arranges Guan Liang（4）, by front-seat rotary churning pile（1）, heel row rotary churning pile（2）And drilling
Bored concrete pile（3）Three campsheds connect into an entirety, constitute the built pile supporting construction in thick peat swamps evolution.
The front-seat rotary churning pile（1）With heel row rotary churning pile（2）Constructed using high pressure jet grouting equipment and technology,
Cement-bentonite grout of the injecting paste material for additive ratio in cement powder less than 8%, the stake of two row's rotary churning piles are long equal, and per root
Churning pile length is not less than cast-in-situ bored pile（3）Stake long.
After the supporting pile driving construction terminates, the construction of later stage waist rail and other supporting constructions for convenience, near foundation ditch one
The front-seat rotary churning pile of side（1）Pile body can Partial Resection.
The Guan Liang（4）Width should exceed front-seat rotary churning pile（1）With front-seat rotary churning pile（2）Outward flange is not less than 10cm；
Three campshed bodies are embedded in Guan Liang（4）Depth be not less than 30cm.
The combinative structure is equally applicable to the support engineering in the soft soil foundations such as deep peat, mud, muck soil.
Beneficial effects of the present invention are：
（1）By in advance construction rotary churning pile, then construction drill bored concrete pile in the middle of two row's rotary churning piles, can effectively solving bore
Hole quality difference and concrete fullness coefficient excessive problem when hole pouring pile is constructed in deep cumulosol；
（2）Rotary churning pile in the combinative structure can be not only used for the water-stop curtain in base pit engineering, by setting in stake top
Put Guan Liang and itself and cast-in-situ bored pile are connected into an entirety, the support action of rotary churning pile can also be made full use of.
Description of the drawings
The present invention is described in further detail below by drawings and Examples, but protection scope of the present invention is not limited to
In the content.
Fig. 1：The front-seat rotary churning pile of built pile supporting construction of the present invention and heel row rotary churning pile horizontal layout schematic diagram.
Fig. 2：The horizontal layout schematic diagram of built pile supporting construction of the present invention.
Fig. 3：The present invention cuts off the built pile supporting construction horizontal layout schematic diagram of front-seat rotary churning pile part pile body.
Fig. 4：The present invention cuts off the built pile supporting construction horizontal section schematic diagram of front-seat rotary churning pile part pile body（Rotary churning pile
Long with the stake of cast-in-situ bored pile equal）.
Fig. 5：The present invention cuts off the built pile supporting construction horizontal section schematic diagram of front-seat rotary churning pile part pile body（Rotary churning pile
Long with the stake of cast-in-situ bored pile unequal）.
Fig. 6：The present invention cuts off the built pile supporting construction longitudinal profile schematic diagram of front-seat rotary churning pile part pile body（Rotary churning pile
Long with the stake of cast-in-situ bored pile equal）.
Fig. 7：The present invention cuts off the built pile supporting construction longitudinal profile schematic diagram of front-seat rotary churning pile part pile body（Rotary churning pile
Long with the stake of cast-in-situ bored pile unequal）.
Respectively it is numbered in figure：1 front-seat rotary churning pile；2 heel row rotary churning piles；3 cast-in-situ bored piles；4 Guan Liangs；A bases
Hole bottom.
Specific embodiment
Built pile supporting construction in the deep peat swamps evolution of the present invention is by front-seat rotary churning pile 1, heel row rotary churning pile 2, drilling
Bored concrete pile 3 and Guan Liang 4 are constituted.Construction axis and the design stake position of front-seat rotary churning pile 1 and heel row rotary churning pile 2 is first depending on, is passed through
Cement-bentonite grout of the dry additive ratio of high pressure jet grouting injection cement less than 8%（Then in cement powder, mix content and be less than
8% cement and the mixed serum of clay）Jet grouting pile construction is carried out, and ensures that two row's rotary churning piles 1,2 are mutually twisted and parallel
Row, form water-stop curtain and improve cumulosol engineering characteristic；After the pile body of before and after's rotary churning pile 1,2 tends towards stability, along two
The center line of row's rotary churning pile 1,2 and design stake position carry out cast-in-situ bored pile 3 and construct；Guan Liang 4 is set in stake top position finally, by three rows
Pile body connects into an entirety.
The two rows rotary churning pile is constructed using high pressure jet grouting equipment and technology, adopts cement in work progress
Cement-bentonite grout of the dry additive ratio less than 8%.
The width of the Guan Liang 4 is not less than 10cm, the depth of the embedded Guan Liang 4 of three campshed bodies more than two row's rotary churning pile outward flanges
It is not less than 30cm.
After the supporting pile driving construction terminates, in Excavation Process, later stage waist rail and other supporting constructions for convenience
Construction, the pile body of front-seat rotary churning pile 1 near foundation ditch side can carry out Partial Resection according to practical situation.
The present invention is as follows using step：（1）Tested according to engineering geological condition, checking computations of base pit stability result and water-stop curtain
Result is calculated, determines that the stake of rotary churning pile and cast-in-situ bored pile is long, stake footpath and pile spacing, and pile body sectional dimension and arrangement of reinforcement are set
Meter；
（2）Front and rear row jet grouting pile construction is carried out by design and construction requirement；
（3）After rotary churning pile pile body tends towards stability, pile driving construction is irrigated by design and construction requirement；
（4）In stake top position construction Guan Liang；
（5）After supporting pile driving construction terminates, excavation of foundation pit is carried out.
Hole quality difference and concrete when the present invention can effectively overcome cast-in-situ bored pile to construct in deep peat swamps evolution
The excessive difficult problem of fullness coefficient, it is ensured that cast-in-situ bored pile pile quality, and reduce construction costs.
Embodiment 1：As shown in Fig. 1,2,3,4,6, a kind of built pile supporting construction in deep peat swamps evolution, by front row
Rotary churning pile 1, heel row rotary churning pile 2, cast-in-situ bored pile 3 and Guan Liang 4 are constituted.Front-seat rotary churning pile 1 and heel row rotary churning pile 2 and drill-pouring
The designing pile length of stake 3 is equal.First according to construction axis and the design stake position of front-seat rotary churning pile 1 and heel row rotary churning pile 2, by height
Cement-bentonite grout of the dry additive ratio of pressure jet groutinl injection cement less than 8%（Then in cement powder, mix content and be less than 8%
Cement and clay mixed serum）Jet grouting pile construction is carried out, and ensures that two row's rotary churning piles are mutually twisted and arranged in parallel, improved
Cumulosol engineering characteristic；After the pile body of rotary churning pile tends towards stability, along two row's rotary churning piles center line and design stake position carry out
Cast-in-situ bored pile 3 is constructed；Guan Liang 4 is set in stake top position finally, three campshed bodies are connected into an entirety.Two row's rotary churning piles are equal
Constructed using high pressure jet grouting equipment and technology, the cement clay in work progress using the dry additive ratio of cement less than 8%
Serosity.The width of Guan Liang 4 is not less than 10cm more than two row's rotary churning pile outward flanges, and the depth of the embedded Guan Liang 4 of three campshed bodies is not less than
30cm.After supporting pile driving construction terminates, in Excavation Process, the construction of later stage waist rail and other supporting constructions for convenience,
Pile body near the front-seat rotary churning pile 1 of foundation ditch side can carry out Partial Resection according to practical situation.
Embodiment 2：As shown in Fig. 1,2,3,5,7, a kind of built pile supporting construction in deep peat swamps evolution, by front row
Rotary churning pile 1, heel row rotary churning pile 2, cast-in-situ bored pile 3 and Guan Liang 4 are constituted.Front-seat rotary churning pile 1 and heel row rotary churning pile 2 and drill-pouring
The designing pile length of stake 3 is unequal.First according to construction axis and the design stake position of front-seat rotary churning pile 1 and heel row rotary churning pile 2, pass through
Cement-bentonite grout of the dry additive ratio of high pressure jet grouting injection cement less than 8% carries out jet grouting pile construction, and ensures two row's churnings
Stake is mutually twisted and arranged in parallel, forms water-stop curtain and improves cumulosol engineering characteristic；Treat that the pile body of rotary churning pile tends to steady
After fixed, along two row's rotary churning piles center line and design stake position carry out cast-in-situ bored pile 3 and construct；Guan Liang is set in stake top position finally
4, three campshed bodies are connected into an entirety.Two row's rotary churning piles are constructed using high pressure jet grouting equipment and technology, are applied
Cement-bentonite grout during work using the dry additive ratio of cement less than 8%.The width of Guan Liang 4 is more than two row's rotary churning pile outward flanges
It is not less than 10cm, the depth of the embedded Guan Liang 4 of three campshed bodies is not less than 30cm.After supporting pile driving construction terminates, in Excavation Process
In, the construction of later stage waist rail and other supporting constructions for convenience, the pile body near the front-seat rotary churning pile 1 of foundation ditch side can basis
Practical situation carries out Partial Resection.
Claims (4)
1. the built pile supporting construction in a kind of deep peat swamps evolution, by front-seat rotary churning pile（1）, heel row rotary churning pile（2）, drilling
Bored concrete pile（3）And Guan Liang（4）Composition, it is characterised in that：First with cement-bentonite grout as injecting paste material, rotary churning pile is carried out front-seat
Rotary churning pile（1）With heel row rotary churning pile（2）Construction, and ensure between two row's rotary churning piles, to be mutually twisted and often arrange all arranged in parallel, shape
Into the water-stop curtain of at least two row's rotary churning piles, improve cumulosol engineering characteristic；Treat before and after's rotary churning pile（1、2）Pile body tend to steady
After fixed, along the center line of two row's rotary churning piles, cast-in-situ bored pile is carried out（3）Construction；Finally in front and back's rotary churning pile（1、2）Fill with drilling
Note stake（3）Apical position arranges Guan Liang（4）, by front-seat rotary churning pile（1）, heel row rotary churning pile（2）And cast-in-situ bored pile（3）Three campsheds
An entirety is connected into, the built pile supporting construction in thick peat swamps evolution is constituted；
The Guan Liang（4）Width should exceed front-seat rotary churning pile（1）With front-seat rotary churning pile（2）Outward flange is not less than 10cm；Three rows
Pile body is embedded in Guan Liang（4）Depth be not less than 30cm.
2. the built pile supporting construction in deep peat swamps evolution according to claim 1, it is characterised in that：The front row
Rotary churning pile（1）With heel row rotary churning pile（2）Constructed using high pressure jet grouting equipment and technology, injecting paste material is dry for cement
Cement-bentonite grout of the additive ratio less than 8% in powder, the stake of two row's rotary churning piles are long equal, and every churning pile length is not less than
Cast-in-situ bored pile（3）Stake long.
3. the built pile supporting construction in deep peat swamps evolution according to claim 1, it is characterised in that：The supporting
After pile driving construction terminates, the construction of later stage waist rail and other supporting constructions for convenience, near the front-seat rotary churning pile of foundation ditch side（1）
Pile body can Partial Resection.
4. the built pile supporting construction in deep peat swamps evolution according to claim 1, it is characterised in that：The combination
Stake supporting construction is equally applicable to the support engineering in deep peat, mud, muck soil soft soil foundation.
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| CN105064377B (en) * | 2015-08-25 | 2017-06-06 | 中铁二院昆明勘察设计研究院有限责任公司 | A kind of combined type pattern foundation pit supporting structure pilework |
| CN106638547B (en) * | 2016-10-17 | 2019-11-01 | 重庆大学 | The pile making method of bored concrete pile in a kind of coral sand ground |
| CN107503362A (en) * | 2017-09-21 | 2017-12-22 | 武汉市政工程设计研究院有限责任公司 | A kind of compound antiskid piling wall retaining structure and construction method suitable for reservoir stability |
| CN109577344B (en) * | 2018-11-29 | 2022-01-07 | 浙江理工大学 | Foundation pit supporting method of vertical variable-rigidity supporting body |
| CN110306558A (en) * | 2019-06-06 | 2019-10-08 | 中铁第四勘察设计院集团有限公司 | Foundation pit supporting method |
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| CN204825918U (en) * | 2014-12-31 | 2015-12-02 | 云南建工基础工程有限责任公司 | Composite pile supporting construction in deep peat matter soil layer |
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| DE19525590C2 (en) * | 1995-07-13 | 1999-04-29 | Zueblin Ag | Construction of an excavation pit with anchoring below the water table |
| US5595459A (en) * | 1995-10-02 | 1997-01-21 | Lomonaco; Stenis | Cofferdam for 4', 8' and 12' diameter tanks |
| CN1043263C (en) * | 1997-05-15 | 1999-05-05 | 李宪奎 | Construction method for building foundation pit stope support |
| CN1296571C (en) * | 2004-04-09 | 2007-01-24 | 南京大学 | Method for supporting foundation trench for agitation piles of soil cement with concrete as the core |
| CN203924071U (en) * | 2014-02-17 | 2014-11-05 | 中交公路规划设计院有限公司 | A kind of foundation pit supporting construction |
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| CN204825918U (en) * | 2014-12-31 | 2015-12-02 | 云南建工基础工程有限责任公司 | Composite pile supporting construction in deep peat matter soil layer |
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Address after: 650501 Yunnan Province, Kunming economic development zone information industry base, Forest Creek Road No. 188 Yunnan Construction Group 5 floor Patentee after: Yunnan construction investment foundation engineering Co., Ltd. Address before: 650011 Dongfeng East Road, Yunnan, Kunming, No. 118 Patentee before: YANTAI CONSTRUCTION ENGINEERING FOUNDATION ENGINEERING CO., LTD. |