CN109680671A - A kind of liquefaction foundation treatment method based on building waste - Google Patents

A kind of liquefaction foundation treatment method based on building waste Download PDF

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Publication number
CN109680671A
CN109680671A CN201910135379.XA CN201910135379A CN109680671A CN 109680671 A CN109680671 A CN 109680671A CN 201910135379 A CN201910135379 A CN 201910135379A CN 109680671 A CN109680671 A CN 109680671A
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China
Prior art keywords
pile
building waste
construction
pipe
pile pipe
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CN201910135379.XA
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Chinese (zh)
Inventor
何旭
王志佳
施杰
谢森林
酒文静
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Hainan University
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Hainan University
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Priority to CN201910135379.XA priority Critical patent/CN109680671A/en
Publication of CN109680671A publication Critical patent/CN109680671A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00Improving or preserving soil or rock, e.g. preserving permafrost soil
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D33/00Testing foundations or foundation structures
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/72Pile shoes
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/26Placing by using several means simultaneously

Abstract

The liquefaction foundation treatment method based on building waste that the invention discloses a kind of, including by construction waste crushing and it is transported to construction site;Piling experiment is carried out on construction reinforcement soil layer periphery;Surveying and locating goes out the piling foundation plan of building waste stake;Pile hole is completed using steam pile driver and guiding piling machine jointly;Pile pipe is squeezed into the predetermined depth of Ground Treatment;It is put into stake holes with a thickness of 80cm~100cm core material, promoting pile pipe makes pile pipe tube bottom have the contact cover height of 20cm thickness with pellet, and vibrating impacter is put into stake holes bottom from immersed tube;After starting 10~20s of vibrating impacter vibration staying, it is fed intake using continuity feeding mode, vibrating impacter and pile pipe are promoted using synchronous phase hoisting way in pile body work progress, every graduated increasing height 30cm, vibrating impacter 10~20s of load time constructs until pile body and completes;It repeats step S7 to construct up to aperture paragraph by paragraph from bottom to top, and records the amount of filler of each section of depth and stay the shake time;All piles body construction is completed using play is jumped;It is constructed using flat milling process to pile-top cushion course.

Description

A kind of liquefaction foundation treatment method based on building waste
Technical field
The invention belongs to the technical fields of building waste processing, and in particular at a kind of liquefied foundation based on building waste Reason method.
Background technique
Hainan Province's seagirt, large area building lot are made of sandy soil, and geographical location is in ring peace sample again Earthquake belt edge belongs to earthquake and takes place frequently band.Sand foundation easily liquefies under seismic loading, and ground generates moderate finite deformation, Superstructure is highly vulnerable to breakage, therefore must be resisted to building lot before carrying out building engineering construction on sandy soil building lot Liquefaction processing, guarantees that building is built up under earthquake and some dynamic loadings to be destroyed because of foundation liquefaction.In engineering Processing mode for the building waste generated by reconstruction of building, removal and newly-built process is mostly to accumulate, fill and be processed into again Raw aggregate, still none reasonable processing mode at present, with the propulsion of urban construction, future is because of generation of reconstructing, remove The problem of building waste can be more and more, how to handle building waste are also increasingly severe.At at present in engineering to liquefied foundation Reason mainly has heavy-tamping method, compacted effect method and vibroflotation.Treatment by Dynamic Compaction liquefied foundation will be rammed repeatedly using compacting equipment Hammer is freely fallen after mentioning certain height, is kept ground closely knit with shock and vibration energy to ground, is improved the character of foundation soil, To improve the bearing capacity of ground and reduce the compressibility of ground.This kind of method is significant with consolidation effect, is applicable in great soil group extensively, sets Standby simple, easy for construction, short construction period saves the advantages that material, is widely used since the 1970s in China, should Kind method can reach good effect to shallow-layer liquefaction foundation treatment.But noise is big when constructing and reinforcement depth is with compacting energy Increase and increase, be not applicable in densely populated area;Compacted effect method be by using vibration, after impact holing, then Rubble, sand, sandstone are squeezed into the hole having become, the secret room pile body that rubble or sand are constituted, and and former pile peripheral earth group are formed At the anti-liquefaction foundation treatment method of composite foundation.The technology is to introduce China the 1950s, after in traffic, water conservancy and soil The basement process for building engineering is widely used.Early stage this method is mainly used for compacted sand, with what is studied and practice In-depth, application range constantly expand.Vibroflotation refers to using a kind of processing method of water punching and consolidation by vibrating liquefied foundation, is shaking The pore-forming in liquefied foundation is rushed under device horizontal vibration and the collective effect of high pressure water, then inserts the hard material such as rubble in batches in hole The ground of pile body and former foundation soil body composition composite foundation is made in material, while the vibration of fluffing of moulding sand layer is close, eliminates under horizontal vibration effect Sand base fluid improves the construction method that sand base resists liquefied ability, improves foundation bearing capacity, reduces sedimentation.
But with the development of construction industry, green building theory is gradually instead of the concept of traditional architecture.To coagulation Civil engineering building refuse is using accumulating, filling and be processed into the processing modes such as recycled aggregate, this can not only reduce urban land area, also City environmental pollution can be had an impact, while can also increase the economic input of building waste processing;Concrete is civil engineering The required raw material of construction, raw material one of of the rubble as concrete is more and more important in Future Projects construction, is made using rubble For pile body core material, this can not only increase the dosage of rubble, also will increase the economic input of engineering;Shallow-layer liquid is used for for heavy-tamping method Good treatment effect can be reached when changing basement process, treatment effect is unobvious when larger for liquefaction depth, and is constructing There is very big noise in the process, saturated sand foundation level of ground water is higher, and the water content of sand has been far longer than optimum moisture content, Compacting power effect under sand be not easy it is closely knit, and compacted depth with compacting can increase and increase, and tamp can size with The weight of hammer ram is directly related, and when the weight of hammer ram increases, requirement to ballast consolidating machine is higher and higher, thus for depth compared with When the processing of big sandy soil liquefied foundation heavy-tamping method by underground water and liquefaction depth etc. it is various influence not be applicable in;And it shakes The raw material that method and Sand Pile Method waste concrete using rubble or sand significantly as pile body core material is rushed, and metaling needs to use Dedicated machining can increase mechanical abrasion, can also increase the economic input that machine uses, and with sand gravel pile reinforcing liquid Change ground, pile body stake diameter is smaller, and it is logical mainly to carry out compacted and offer draining to liquefaction earth to the reinforcement mechanism of liquefied foundation The effect in road, the small soil compaction effect of stake diameter is unobvious, while stake diameter is small that spacing can be made to reduce, this will increase operational procedure, extend Construction period;Vibroflotation reinforcing liquefied foundation mainly has two methods of wet process and dry method at present, mostly uses wet process to apply in engineering Work, dry construction in pore forming process mainly the pile body soil body press to around in soil layer, this can increase the abrasion of vibrating impacter, engineering On not frequently with.Using wet construction because that can generate a large amount of mud using high pressure water pore-forming during drilling construction, this is not Difficulty can be only caused to site operation, while improper to mud conditioning, also will cause environmental pollution, therefore need in work progress It is equipped with dedicated water system and mud disposal system, this can bring inconvenience to construction site, and saturated sand is inviscid Soil easily collapses in the unsupported situation of hole wall when applying exciting force to the soil body in pore forming process.
Summary of the invention
It is an object of the invention to be directed to above-mentioned deficiency in the prior art, a kind of liquefaction based on building waste is provided Base processing method is constructed with providing the new building waste processing mode of one kind, solving traditional compacted sand broken stone pile method because of stake diameter Small soil compaction effect is unobvious, avoid in traditional vibroflotation work progress generate mud defect and institute at stake holes under no support pole Easily various problems such as collapsing.
In order to achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of liquefaction foundation treatment method based on building waste comprising:
White garbage in S1, removing building waste, building waste, which is crushed crusher machine and is processed into, to be had centainly Size grading is simultaneously transported to construction site;
S2, carry out piling experiment on construction reinforcement soil layer periphery, determine encryption electric current during bore forming, Load time, amount of filler and encryption segment length;
S3, surveying and locating go out the outer profile of the piling foundation plan of building waste stake, the marking pile heart or stake;
S4, pile hole construction is completed using steam pile driver and guiding piling machine jointly, the pile top of pile pipe is using prefabricated mixed Solidifying soil pile top after the completion of surveying and locating, precast concrete pile top is fixed at stake position, moving steam piling machine and guiding piling Machine connects pile pipe and pile top, while adjusting the stake heart align piles position of pile pipe, and piling machine checks tubulature with plumb bob messenger wire afterwards in place Verticality makes verticality meet design requirement;
S5, after pile pipe to be squeezed into the predetermined depth of soil layer, pile pipe upper end pile monkey is dismantled, and pile pipe is stayed in the soil layer of pore-forming In;
S6, it is put into stake holes with a thickness of 80cm~100cm core material, promoting pile pipe makes pile pipe tube bottom and pellet have 20cm thick Cover height, and vibrating impacter is put into stake holes bottom from immersed tube;
It after S7, starting 10~20s of vibrating impacter vibration staying, is fed intake using continuity feeding mode, vibrating impacter and pile pipe are using same It walks interim hoisting way to be promoted, every graduated increasing height 30cm, vibrating impacter 10~20s of load time complete single hop stake Body construction;
S8, repeating step S7, piecewise sequence construction and records the amount of filler of each section of depth and stays until aperture from bottom to top Shake the time;
S9, all piles body construction is completed using jump play;
S10, it is constructed using flat milling process to pile-top cushion course.
Preferably, in step S1 building waste breaking method are as follows: using crusher by bulk construction waste crushing granulating Diameter range is the particle of 0.5~50mm, and has certain size grading.
Preferably, in step S2, if not carrying out piling experiment, encryption segment length takes 30~50cm, and load time 10~ 20s。
Preferably, pile pipe is squeezed into the predetermined depth of soil layer by step S5 further include:
Stop pile monkey after depth of pore forming reaches predetermined depth, and check the verticality of pile pipe in pore forming process, in time Pile pipe offset is adjusted, is mentioned pile pipe slightly up after the completion of pore-forming, pull-off pile top.
Preferably, step S10 pile-top cushion course, which is constructed, includes:
After the completion of all reinforcing pile body constructions, removal earth's surface is loosened the soil, and laying depth is the bed course of 300mm~500mm, pad Layer packing material size is less than 30mm, rams degree of filling out less than 0.9, carries out watering wetting to filler before rolling, controls optimum moisture content ωop 8%~12%, roll 6~8 times.
Liquefaction foundation treatment method provided by the invention based on building waste, has the advantages that
The present invention does pile body core material using building waste, and traditional immersed tunnelling method and vibroflotation are combined, overcome The close effect of the vibration of the soil compaction effect of sand broken stone pile and vibro-replacement stone column is combined by respective disadvantage, is distinguished liquefied foundation Layer compaction effect and dither effect are carried out, consolidation effect becomes apparent from, and reduces mud emission when vibroflotation is individually constructed, and utilizes The lifting that vibrating impacter and pile pipe are synchronously completed at the jacking system of stake holes construction machinery, operational procedure is multiple when avoiding individually going up and down It is miscellaneous, the problems such as cover height of pile pipe and pellet is insufficient and avoids hole wall collapse during bore forming.Meanwhile reducing The construction equipment of traditional vibroflotation construction, the lifting of immersed tube and vibrating impacter can be completed using the lifting device of piling machine, save Economic cost.
Detailed description of the invention
Fig. 1 is the liquefaction foundation treatment method construction process figure based on building waste.
Fig. 2 is the liquefaction foundation treatment method stake holes schematic diagram based on building waste.
Fig. 3 is that the liquefaction foundation treatment method based on building waste decorates layout drawing.
Fig. 4 is the liquefaction foundation treatment method pile hole construction figure based on building waste.
Fig. 5 is the liquefaction foundation treatment method pile body core material construction drawing based on building waste.
Fig. 6 is the liquefaction foundation treatment method pile precedence diagram based on building waste.
Fig. 7 is the liquefaction foundation treatment method cushion construction based on building waste.
Wherein, 1, top-out;2, basic;3, bed course;4, consolidated subsoil;5, pile body is reinforced;6, steam pile monkey;7, it sinks Pipe;8, precast concrete pile top;9, vibrating impacter;10, core material.
Specific embodiment
A specific embodiment of the invention is described below, in order to facilitate understanding by those skilled in the art this hair It is bright, it should be apparent that the present invention is not limited to the ranges of specific embodiment, for those skilled in the art, As long as various change is in the spirit and scope of the present invention that the attached claims limit and determine, these variations are aobvious and easy See, all are using the innovation and creation of present inventive concept in the column of protection.
According to one embodiment of the application, with reference to Fig. 1-Fig. 7, the liquefaction foundation treatment based on building waste of this programme Method, comprising:
White garbage in S1, removing building waste, by construction waste crushing and is transported to construction site;
Specific method includes: that the building waste that removal, reconstruction or new building generate is transported to construction site, is removed white Color rubbish, the particle for being 0.5~50mm at particle size range by bulk construction waste crushing with crusher, and there is certain partial size Gradation, after core material 10 is transported to construction site.
Therewith, smooth location, the humus such as rubbish, the weeds on place cleaning surface are needed, smooth location keeps road smooth It is logical.
S2, piling experiment is carried out on 4 periphery of construction reinforcement ground to determine the encryption electric current in vibration formation of pile, stay Vibration time, amount of filler and encryption length;
Specific method includes: to carry out piling experiment on 4 periphery of construction reinforcement ground to determine in vibration formation of pile Encrypt electric current, load time, amount of filler and encryption length;In no progress piling experiment by " building foundation treatment technology rule Model " regulation value in JGJ79-2012: encryption segment length takes 30~50cm, 10~20s of load time.
S3, surveying and locating go out the outer profile of the piling foundation plan of rubbish stake, the marking pile heart or stake;
Specific method includes: the range of the sand foundation processing given according to design drawing, and surveying and locating goes out rubbish stake Piling foundation plan marks the outer profile of a heart or stake.
S4, with reference to Fig. 6, pile driving equipment completes pile hole construction by the two using steam pile driver and guiding piling machine jointly, The pile top of pile pipe uses precast concrete pile top 8, after the completion of surveying and locating, precast concrete pile top 8 is fixed at stake position, moves Dynamic steam pile driver connects pile pipe and pile top with guiding piling machine, while adjusting the stake heart align piles position of pile pipe, and piling machine is in place The verticality for checking tubulature with plumb bob messenger wire afterwards makes verticality meet design requirement, and pile hole construction sequence, which uses, jumps play construction, There is building Shi Yingcong building to survey the influence for starting to construct to reduce pore-forming to building around construction site.
S5, the predetermined depth that pile pipe is squeezed into soil layer dismantle pile pipe upper end pile monkey, and pile pipe is stayed in the soil layer of pore-forming In;
Specific method includes:
Pore-forming starts the pile monkey of steam pile driver, and pile pipe is squeezed into the predetermined depth of soil layer, stops after reaching predetermined depth Pile monkey, the verticality of pile pipe check at any time in pore forming process, can adjust in time so that offset occurs in pile pipe, will after the completion of pore-forming Pile pipe mentions slightly up, pull-off pile top, prevents pile pipe sidewall resistance after filler from increasing, pile pipe is difficult to be promoted.
Dismantle pile pipe upper end pile monkey, after pore-forming in place afterwards disassembly pile pipe upper end pile monkey, convenient for feeding intake and hanging vibrating impacter 9, while pile pipe being stayed in the soil layer of pore-forming, to prevent from extracting after pile pipe during feeding intake soil layer because applying vibration force upper layer The earth fall is fallen, and blocks stake holes.
S6, it is put into stake holes with a thickness of 80cm~100cm core material 10, promoting pile pipe makes pile pipe tube bottom and pellet have 20cm Cover height afterwards, and vibrating impacter 9 is put into stake holes bottom from immersed tube 7;
Wherein, vibrating impacter 9 uses the small-sized vibrating impacter 9 of ZCQ13.
It after S7, starting 9 10~20s of vibration staying of vibrating impacter, is fed intake using continuity feeding mode, vibrating impacter 9 and pile pipe use Synchronous phase hoisting way is promoted, every graduated increasing height 30cm, 10~20s of vibration staying, is constructed and is completed until pile body;
S8, repeating step S7, construction is until aperture paragraph by paragraph from bottom to top, and when recording the amount of filler of each section of depth and staying shake Between;
S9, all piles body construction is completed using jump play.
S10, it is constructed using flat milling process to pile-top cushion course 3;
Specific method includes: after the completion of the construction of all reinforcing pile bodies 5, and removal earth's surface is loosened the soil, and is laid with bed course 3, and bed course 3 is thick 300mm~500mm is spent, 3 packing material size of bed course is less than 30mm, rams degree of filling out less than 0.9, carries out watering profit to filler before rolling It is wet, control optimum moisture content ωop8%~12%, roll 6~8 times.
The present invention does pile body core material 10 using building waste, and traditional 7 method of immersed tube and vibroflotation are combined, and increases The utilization ways of building waste can be effectively reduced influence of the building waste to environment, improve because stacking shared by building waste It is utilized with the area in soil.
More traditional 7 broken stone pile of immersed tube is compared, and stake diameter used by the method for the present invention increases, and is squeezed to the soil body around pile pipe Close effect is more evenly.
By hammering pore-forming, the soil body at hole location is pressed into surrounding soil, compacted work has been carried out to the soil body around stake holes With shake close to core material 10 using vibrating impacter 9 while applying exciting force to the soil body around stake holes, pile peripheral earth carries out secondary It shakes close encryption, becomes apparent from liquefaction earth cipher round results.
It is close that the encryption of core material 10 uses vibrating impacter 9 to shake, at the water supply and mud when reducing using the construction of single vibroflotation Reason system synchronously completes the promotion of vibrating impacter 9 and pile pipe using the jacking system of boring machine, reduces the throwing of construction machinery Enter, accelerates construction speed.
Sand is cohesiveless soil, and when applying exciting force to surrounding soil in hole after pore-forming, hole wall is in unsupported situation Under be easy to collapse, after 7 pore-forming of immersed tube, immersed tube 7 is supported as hole wall during filler and foundation soil body encrypt, effectively Prevent Study on Soil Collapse.
Using 7 pore-forming of immersed tube, vibrating impacter 9 encrypts the generation effectively avoided using mud when 9 pore-forming of vibrating impacter, avoids Pollution of the mud to environment.
Although being described in detail in conjunction with specific embodiment of the attached drawing to invention, should not be construed as to this patent Protection scope restriction.In range described by claims, those skilled in the art are without creative work The various modifications and deformation made still belong to the protection scope of this patent.

Claims (5)

1. a kind of liquefaction foundation treatment method based on building waste characterized by comprising
White garbage in S1, removing building waste, building waste through broken crusher machine and is processed into certain partial size Gradation is simultaneously transported to construction site;
S2, piling experiment, determining encryption electric current during bore forming, vibration staying are carried out on construction reinforcement soil layer periphery Time, amount of filler and encryption segment length;
S3, surveying and locating go out the outer profile of the piling foundation plan of building waste stake, the marking pile heart or stake;
S4, pile hole construction is completed using steam pile driver and guiding piling machine jointly, the pile top of pile pipe uses precast concrete After the completion of surveying and locating, precast concrete pile top is fixed at stake position for pile top, and moving steam piling machine and guiding piling machine connect Pile extension pipe and pile top, while the stake heart align piles position of pile pipe is adjusted, piling machine checks the vertical of tubulature with plumb bob messenger wire afterwards in place Degree, makes verticality meet design requirement;
S5, after pile pipe to be squeezed into the predetermined depth of soil layer, pile pipe upper end pile monkey is dismantled, and pile pipe is stayed in the soil layer of pore-forming;
S6, it is put into stake holes with a thickness of 80cm~100cm core material, promoting pile pipe makes pile pipe tube bottom and pellet have 20cm is thick to cover Lid height, and vibrating impacter is put into stake holes bottom from immersed tube;
It after S7, starting 10~20s of vibrating impacter vibration staying, is fed intake using continuity feeding mode, vibrating impacter and pile pipe use same step Section property hoisting way is promoted, every graduated increasing height 30cm, vibrating impacter 10~20s of load time, is completed single hop pile body and is applied Work;
S8, repeating step S7, piecewise sequence construction is until aperture from bottom to top, and when recording the amount of filler of each section of depth and staying shake Between;
S9, all piles body construction is completed using jump play;
S10, it is constructed using flat milling process to pile-top cushion course.
2. the liquefaction foundation treatment method according to claim 1 based on building waste, it is characterised in that: the step S1 The breaking method of middle building waste are as follows: for being 0.5~50mm at particle size range by bulk construction waste crushing using crusher Grain, and there is certain size grading.
3. the liquefaction foundation treatment method according to claim 1 based on building waste, it is characterised in that: the step S2 In, if not carrying out piling experiment, encryption segment length takes 30~50cm, 10~20s of load time.
4. the liquefaction foundation treatment method according to claim 1 based on building waste, it is characterised in that: the step S5 Pile pipe is squeezed into the predetermined depth of soil layer further include:
Stop pile monkey after depth of pore forming reaches predetermined depth, and check the verticality of pile pipe in pore forming process, adjusts in time Pile pipe offset, pore-forming after the completion mention pile pipe slightly up, pull-off pile top.
5. the liquefaction foundation treatment method according to claim 1 based on building waste, it is characterised in that: the step S10 pile-top cushion course is constructed
After the completion of all reinforcing pile body constructions, removal earth's surface is loosened the soil, and laying depth is the bed course of 300mm~500mm, and bed course is filled out Expect that partial size is less than 30mm, rams degree of filling out less than 0.9, watering wetting is carried out to filler before rolling, control optimum moisture content ωop? 8%~12%, it rolls 6~8 times.
CN201910135379.XA 2019-02-22 2019-02-22 A kind of liquefaction foundation treatment method based on building waste Pending CN109680671A (en)

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CN111074876A (en) * 2019-12-03 2020-04-28 海南民投建筑工程有限公司 Novel environment-friendly low-vacuum densification method construction method for foundation
CN111593725A (en) * 2020-05-15 2020-08-28 北京市政建设集团有限责任公司 Vibroflotation gravel pile and construction method thereof

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Publication number Priority date Publication date Assignee Title
CN111074876A (en) * 2019-12-03 2020-04-28 海南民投建筑工程有限公司 Novel environment-friendly low-vacuum densification method construction method for foundation
CN111593725A (en) * 2020-05-15 2020-08-28 北京市政建设集团有限责任公司 Vibroflotation gravel pile and construction method thereof

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