CN202718084U - Composite foundation with flexible piles and drain boards combined - Google Patents

Composite foundation with flexible piles and drain boards combined Download PDF

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Publication number
CN202718084U
CN202718084U CN 201220421319 CN201220421319U CN202718084U CN 202718084 U CN202718084 U CN 202718084U CN 201220421319 CN201220421319 CN 201220421319 CN 201220421319 U CN201220421319 U CN 201220421319U CN 202718084 U CN202718084 U CN 202718084U
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CN
China
Prior art keywords
layer
band drain
foundation
flexible
pile
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
CN 201220421319
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Chinese (zh)
Inventor
寿贤锋
杨建弟
赵汉力
王建亮
石坚冰
寿凯锋
寿复才
杨建华
周航
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.)
EASTERN CONSTRUCTION GROUP CO LTD
ZHEJIANG TONGDA CONSTRUCTION GROUP CO Ltd
YUEFENG CONSTRUCTION GROUP CO Ltd
Original Assignee
EASTERN CONSTRUCTION GROUP CO LTD
ZHEJIANG TONGDA CONSTRUCTION GROUP CO Ltd
YUEFENG CONSTRUCTION GROUP 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 EASTERN CONSTRUCTION GROUP CO LTD, ZHEJIANG TONGDA CONSTRUCTION GROUP CO Ltd, YUEFENG CONSTRUCTION GROUP CO Ltd filed Critical EASTERN CONSTRUCTION GROUP CO LTD
Priority to CN 201220421319 priority Critical patent/CN202718084U/en
Application granted granted Critical
Publication of CN202718084U publication Critical patent/CN202718084U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a composite foundation with flexible piles and drain boards combined. The composite foundation with the flexible piles and the drain boards combined is arranged on a non-soft layer and comprises a mattress layer and a soft foundation earth mass layer. A plurality of the flexible piles and the drain boards which are evenly arranged and distributed at intervals are arranged in the soft foundation earth mass layer, the soft foundation earth mass layer is divided into a cylinder reinforcement layer, a drain board processing layer and a drain board underlying layer, and a geogrid is arranged in the mattress layer. According to the composite foundation with the flexible piles and the drain boards combined, the advantages of a drainage concretion method and a cement mixing pile are combined, pore water in a deep-layer soft foundation earth mass layer is gradually drained through the drain boards, the bearing capacity of the foundation is gradually increased, earth among the piles and pile bodies form a solidified body with integrity, water stability and certain strength through the flexible piles, and stability and shear-resistance strength of a shallow foundation are improved. Meanwhile, the mattress layer provided with the geogrid meets a foundation drainage requirement and has the function of a bearing layer to bear the load of construction machinery.

Description

The composite foundation of a kind of flexible pile and band drain combination
Technical field
The utility model relates to a kind of foundation treatment technology, refers more particularly to a kind ofly can improve bearing capacity of foundation soil and reduce the flexible pile of ground Excessive Settlement and the composite foundation of band drain combination.
Background technology
The problem that building highway mainly exists on the deep saturated soft soil ground is bearing capacity and sedimentation and deformation, as soft base processing method at present commonly used: pre-pressure drainage consolidation method and the method for mixing cement and soil into pile respectively have characteristics, can reduce the sedimentation of building lot such as pre-pressure drainage consolidation method, accelerate the growth of foundation soil shear strength, improve intensity and the stability of ground, and the method for mixing cement and soil into pile can stir inter-pile soil and cement hardener, weak soil is hardened into have globality, the pile body of water stability and some strength, improved the bearing capacity of ground, but because consolidation must be arranged compression system (preloading thing) and drainage system, the preloading amount is large, and need more draining shaft to increase the drainage distance in draining water way and the shortening soil layer, also cause the increase of engineering quantity;
And the Soil-cement rule is limited by the restriction of construction technology, and reinforcement depth can not be excessively dark, can only be 8-15M, can't process deep foundation.
The utility model content
The utility model solves mainly that consolidation preloading amount in the ground treatment construction skill is large, gutter is more and technical problem that Deep Mixing Method can't be processed the deep layer soil body; Provide a kind of and constructed that rear superficial part foundation stability is good, settling amount is little, substratum estimates accurately and bearing capacity of foundation soil is high, the composite foundation of the flexible pile of short construction period and band drain combination.
In order to solve the technical problem of above-mentioned existence, the utility model mainly is to adopt following technical proposals:
The composite foundation of a kind of flexible pile of the present utility model and band drain combination, be located on the non-soft layer, comprise mattress layer and soft subgrade soil body layer, be provided with some flexible piles evenly distributed and spaced apart and band drain in the described soft subgrade soil body layer, the length of described band drain is greater than described flexible pile length, soft subgrade soil body layer is divided into the cylinder back-up coat on upper strata, the band drain processing layer of lower floor and the band drain substratum of bottom, the degree of depth of described cylinder stabilization zone is identical with flexible pile length, the degree of depth of described band drain processing layer is identical with the length of band drain, the bottom of described band drain substratum contacts with described non-soft layer, composite foundation combines the advantage of consolidation and cement mixing method, band drain is slowly discharged deep layer soft subgrade soil body layer mesopore Nei Shui, reduce void ratio, make soft subgrade soil body generation consolidation deformation, the bearing capacity of corresponding ground also increases gradually, improved the accuracy of estimation of substratum, and flexible pile also makes soft subgrade soil body and pile body formation between stake have globality, the induration of water stability and some strength, stability and the shear strength of shallow layer foundation have been improved, increased the bearing capacity of ground, simultaneously, mattress layer had both satisfied the drainage requirement of ground, the function that also possesses bearing stratum, to bear the load of construction machinery, eliminate the differential settlement of ground.
As preferably, described flexible pile is cement mixing pile or broken stone pile, makes pile body periphery weak soil harden into an induration, and the bearing strength of soft subgrade soil body layer is greatly improved.
As preferably, described band drain is plastic draining board, and the plastic draining board quality is light, intensity is high, good endurance, and the ground stabilization cycle is shortened in constructability and management.
As preferably, described mattress layer is sand cushion, and as the horizontal drainage body, water permeability preferably sand cushion can guarantee that the water of discharging in the ground consolidation process can be smoothly by discharging rapidly behind the sand cushion, makes the fixed of pressurized soil layer can be normal, shortens consolidation time.
As preferably, be provided with geo-grid in the described mattress layer, the geo-grid of in mattress layer, laying, sandstone bulk cargo to mattress layer has stronger lateral limitation power and skid resistance, make mattress layer form an integral body, reduced the differential settlement phenomenon of ground, ensured that ground has higher Rigidity and strength.
As preferably, the top of described band drain and described flexible pile all is located in the described mattress layer, the degree of depth of mattress layer is inserted greater than 40cm in the top of band drain and flexible pile, band drain inserts in the sandstone aggregate of mattress layer, the water capacity in the band drain is easily got rid of along mattress layer, and in order to the treatment effect that improves ground, and flexible pile inserts in the mattress layer, the bearing capacity that mattress layer is subject to can be dispersed on each flexible pile, satisfies the requirement for bearing capacity of composite foundation.
The beneficial effects of the utility model are: the advantage that combines consolidation and cement mixing method, by band drain the intrapore water of deep layer soft subgrade soil body is slowly discharged, reduced void ratio, make soft subgrade soil body generation consolidation deformation, eliminate the part sedimentation on basis, corresponding bearing capacity of foundation soil also increases gradually, and improved the estimation accuracy of substratum, and flexible pile also makes soft subgrade soil body and pile body formation between stake have globality, the induration of water stability and some strength, stability and the shear strength of superficial part ground have been improved, increased the bearing capacity of ground, simultaneously, the stacking drainage requirement that had both satisfied ground with the mattress layer of geo-grid on the soft subgrade soil body layer has also possessed the function of bearing stratum, can bear the construction machinery load.
Description of drawings
Fig. 1 is a kind of structural representation of the present utility model.
The stake top schematic diagram of Fig. 2 Fig. 1.
1. non-soft layers among the figure, 2. mattress layer, 3. cylinder back-up coat, 4. band drain processing layer, 5. band drain substratum, 6. flexible pile, 7. band drain, 8. geo-grid.
The specific embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: a kind of flexible pile of the present embodiment and the composite foundation of band drain combination, be located on the non-soft layer 1, as depicted in figs. 1 and 2, comprise mattress layer 2 and soft subgrade soil body layer, be inserted with flexible pile 6 and the band drain 7 of some evenly distributed and equidistant distributions in the soft subgrade soil body layer, flexible pile is cement mixing method, band drain is plastic draining board, the length of band drain is greater than flexible pile length, soft subgrade soil body layer is divided into the cylinder back-up coat 3 on upper strata, the band drain processing layer 4 of lower floor and the band drain substratum 5 of bottom, the degree of depth of cylinder stabilization zone is identical with flexible pile length, the degree of depth of band drain processing layer is identical with the length of band drain, and the bottom of band drain substratum contacts with non-soft layer; Mattress layer is the sand cushion that is equipped with geo-grid 8, is stacked on the top of pile body back-up coat, and all insert in the mattress layer at the top of band drain and flexible pile, and insertion depth is 45cm.
During construction, undertaken by the step of band drain behind the first flexible pile, specific as follows,
The cement-soil stirring pile construction step:
1) on request setting-out of flexible pile stake position;
2) pile-forming machine perching checks drilling rod verticality and deviation;
3) stir in advance sinking for the first time, simultaneously, the cement grout preparation also is delivered to a machine;
4) determine that drilling rod arrives projected depth, form the stake hole;
5) drilling rod is promoted to and stops red dog, whitewashes simultaneously;
6) drilling rod stirs and sinks down into pile top again, the slurries in the stake hole is pressed ooze to the pile body periphery soil body;
7) drilling rod is promoted to for the second time and stops red dog, whitewashes simultaneously;
8) drilling rod stirs again rear lifting and shifts out a hole, finishes the construction of cement mixing method;
9) the like, finish the construction of whole cement mixing methods.
The Plastic Drain Slab Construction step:
1) place cleaning fills pre-arch soil and stacking sandstone and forms mattress layer;
2) measuring plastic draining sheet pile position on request;
3) telephone-moving is in place, begins to plug plastic draining board;
4) pile crown of plastic draining board is processed, as does not reach requirement, re-starts plugging of band drain;
5) the like, finish plugging of whole band drains;
6) stacking residue sandstone and lay geo-grid is finished the laying of whole mattress layer;
7) foundation settlement observation.
Above explanation is not that the utility model has been done restriction; the utility model also is not limited only to giving an example of above-mentioned explanation; the variation that those skilled in the art make in essential scope of the present utility model, retrofit, increase or replace, all should be considered as protection domain of the present utility model.

Claims (6)

1. the composite foundation of a flexible pile and band drain combination, be located on the non-soft layer (1), it is characterized in that: comprise mattress layer (2) and soft subgrade soil body layer, be provided with some flexible piles evenly distributed and spaced apart (6) and band drain (7) in the described soft subgrade soil body layer, the length of described band drain is greater than described flexible pile length, soft subgrade soil body layer is divided into the cylinder back-up coat (3) on upper strata, the band drain processing layer (4) of lower floor and the band drain substratum (5) of bottom, the degree of depth of described cylinder stabilization zone is identical with flexible pile length, the degree of depth of described band drain processing layer is identical with the length of band drain, and the bottom of described band drain substratum contacts with described non-soft layer.
2. the composite foundation of a kind of flexible pile according to claim 1 and band drain combination is characterized in that: described flexible pile (6) is cement mixing pile or broken stone pile.
3. the composite foundation of a kind of flexible pile according to claim 1 and band drain combination, it is characterized in that: described band drain (7) is plastic draining board.
4. according to claim 1 and 2 or the composite foundation of 3 described a kind of flexible piles and band drain combination, it is characterized in that: described mattress layer (2) is sand cushion.
5. the composite foundation of a kind of flexible pile according to claim 4 and band drain combination is characterized in that: be provided with geo-grid (8) in the described mattress layer (2).
6. the composite foundation of a kind of flexible pile according to claim 1 and band drain combination, it is characterized in that: described band drain (7) all is located in the described mattress layer (2) with the top of described flexible pile (6), and the degree of depth of mattress layer is inserted greater than 40cm in the top of band drain and flexible pile.
CN 201220421319 2012-08-23 2012-08-23 Composite foundation with flexible piles and drain boards combined Expired - Fee Related CN202718084U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220421319 CN202718084U (en) 2012-08-23 2012-08-23 Composite foundation with flexible piles and drain boards combined

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220421319 CN202718084U (en) 2012-08-23 2012-08-23 Composite foundation with flexible piles and drain boards combined

Publications (1)

Publication Number Publication Date
CN202718084U true CN202718084U (en) 2013-02-06

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103306270A (en) * 2013-05-31 2013-09-18 武汉广益交通科技股份有限公司 Method for processing environment-friendly deep soft soil shallow foundation and device for reinforcing foundation
CN103774639A (en) * 2014-01-27 2014-05-07 中铁二十二局集团第一工程有限公司 Preloading system and construction method
CN105019425A (en) * 2015-06-04 2015-11-04 河海大学 Construction method of drainage body and solidified layer combined foundation structure
CN106677157A (en) * 2017-02-17 2017-05-17 厦门中平公路勘察设计院有限公司 Construction technology for deep soft foundation treatment
CN104947653B (en) * 2014-03-28 2017-06-30 中国二十冶集团有限公司 For the decompression method of vibrator pipe sinking cast-in-place pile construction in saturation mud
CN109371954A (en) * 2018-10-25 2019-02-22 广西建工集团基础建设有限公司 A kind of construction method of PHC tubular pole consolidation draining system in soft soil foundation
CN111877309A (en) * 2020-06-16 2020-11-03 中交第三公路工程局有限公司 Construction method of sand pile and water drainage plate composite foundation high-fill embankment in marsh area
CN112030649A (en) * 2020-09-07 2020-12-04 中国电建市政建设集团有限公司 CFG pile-forming construction method suitable for fluid plastic soil layer

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103306270A (en) * 2013-05-31 2013-09-18 武汉广益交通科技股份有限公司 Method for processing environment-friendly deep soft soil shallow foundation and device for reinforcing foundation
CN103306270B (en) * 2013-05-31 2015-09-09 武汉广益交通科技股份有限公司 Environmentally friendly Deep Thick Soft Ground shallow layer foundation processing method and bracing means thereof
CN103774639A (en) * 2014-01-27 2014-05-07 中铁二十二局集团第一工程有限公司 Preloading system and construction method
CN104947653B (en) * 2014-03-28 2017-06-30 中国二十冶集团有限公司 For the decompression method of vibrator pipe sinking cast-in-place pile construction in saturation mud
CN105019425A (en) * 2015-06-04 2015-11-04 河海大学 Construction method of drainage body and solidified layer combined foundation structure
CN106677157A (en) * 2017-02-17 2017-05-17 厦门中平公路勘察设计院有限公司 Construction technology for deep soft foundation treatment
CN109371954A (en) * 2018-10-25 2019-02-22 广西建工集团基础建设有限公司 A kind of construction method of PHC tubular pole consolidation draining system in soft soil foundation
CN111877309A (en) * 2020-06-16 2020-11-03 中交第三公路工程局有限公司 Construction method of sand pile and water drainage plate composite foundation high-fill embankment in marsh area
CN111877309B (en) * 2020-06-16 2021-09-14 中交第三公路工程局有限公司 Construction method of sand pile and water drainage plate composite foundation high-fill embankment in marsh area
CN112030649A (en) * 2020-09-07 2020-12-04 中国电建市政建设集团有限公司 CFG pile-forming construction method suitable for fluid plastic soil layer

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130206

Termination date: 20170823

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