CN101591906A - The method for processing foundation of intubate, multipass vacuum well-point dewatering dynamic consolidation - Google Patents
The method for processing foundation of intubate, multipass vacuum well-point dewatering dynamic consolidation Download PDFInfo
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- CN101591906A CN101591906A CNA2009100534582A CN200910053458A CN101591906A CN 101591906 A CN101591906 A CN 101591906A CN A2009100534582 A CNA2009100534582 A CN A2009100534582A CN 200910053458 A CN200910053458 A CN 200910053458A CN 101591906 A CN101591906 A CN 101591906A
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Abstract
An a kind of intubate, the method for processing foundation of multipass vacuum well-point dewatering dynamic consolidation adopts dynamic compaction and intubate of suitable energy level, multipass vacuum well-point dewatering process combined, the dissipation of the excess pore water pressure that the too high and dynamic consolidation construction in accelerating ground water position causes, has the diffusion effect that certain thickness " crust layer " increases subsidiary stress by top layer formation, form double-layered ground, regulating action by " crust layer " reduces the relative settlement under the load action, make the compatibility of deformation in whole place, the double requirements of bearing capacity of foundation soil and distortion is satisfied in acting in conjunction.The present invention significantly improves the top layer bearing capacity in conjunction with the strong rammer of low-lying level and vacuum well-point dewatering quickens the advantage that the place excess pore water pressure dissipates, propose the method for processing foundation of intubate, multipass vacuum well-point dewatering dynamic consolidation, have that cost is saved, speed of application is fast, construction experience is ripe, technology is simple, the obvious results advantage.
Description
Technical field
The present invention relates to a kind of method for processing foundation, the ground that is applied to engineerings such as service load is less, the load action area is bigger cargo container stockyard, airport, port and pier, warehouse is handled, and a kind ofly specifically solves that top layer bearing capacity deficiency, depths mucky soil thickness are thicker, the new method of the big problem of differential deformation under the effect of large tracts of land uniform load.
Background technology
At present, handle that top layer bearing capacity deficiency, depths mucky soil thickness are thicker, the ground under the effect of large tracts of land uniform load, method for processing foundation commonly used includes preloading, vacuum method, excavation cushion, High vacuum compacting method, dynamic replacement method, cement mixing method method, vibroflotation method, slip casting method, chemical mix method, CFG stake method, compacted sand-gravel pile method, rigid pile, flexible pile, reaches hard and soft property composite pile foundation method, settlement Control composite pile foundation method or the like.
Wherein dynamic compaction is a kind of most economical processing method efficiently, it is remarkable to the raising effect of bearing capacity of foundation soil to handle the back, the general equal requirement for bearing capacity that satisfies conventional construction of structures or harbour, airport, warehouse logistics base, but its shortcoming is, present strong ramming technology is only applicable to the silt and the grounds such as cohesive soil, collapsible loess, plain fill and miscellaneous fill of gravelly soil, sand, low saturation, all be cautious in generally speaking using for the cohesive soil that the silt and the soft moulding～stream of high saturation are moulded, improper use is easy to cause " spongy soil " phenomenon.
Vacuum well-point dewatering is a kind of water discharge method of active, the vacuum-dewatering dynamic consolidation method handles weak soil because consolidation effect is remarkable, cheap, speed of application is fast, advantages such as it is simple and convenient to construct and extensive use and development, construction technology adopts " two fall three rammers " or " three fall three rammers " more, promptly insert the vacuum well casing for the first time, tube drawing rammed by force after precipitation put in place, carry out the intubate precipitation second time again after strong the rammer, after precipitation puts in place again tube drawing carry out strong rammer second time, the repeatedly whole successively intubate of order like this, tube drawing carries out dynamic consolidation construction, can realize the construction technology of " multipass precipitation multipass rams by force ", guarantee that groundwater table all is in low state in the dynamic consolidation construction process.But " multipass precipitation multipass rams by force " all exists the problem than the large-engineering amount, causes a lot of unnecessary duplications of labour, strengthened all over the time interval between ramming, and prolonged total construction period.In order to prevent borehole wall smear effect, usually wellhole top 1～2m adopts machinery to draw hole (boring, static pressure etc.), hydraulic flushing in hole method intubate is adopted in the wellhole bottom more, all needs punching at every turn, and the artificial top layer soil body that repeatedly causes suffers water logging bubble and lower floor's soil body too saturated because of water filling.
Summary of the invention
The method for processing foundation that the purpose of this invention is to provide an a kind of intubate, multipass vacuum well-point dewatering dynamic consolidation, need an intubate just can carry out 2 times or 3 times precipitation dynamic consolidation constructions, and in the dynamic consolidation construction process, can also continue precipitation, make the underground negative pressure state that is in, help in the work progress and the worker after pore pressure dissipation, shorten all over ramming at interval, accelerate the dissipation of pore water pressure, shorten construction period greatly.It can be applicable to handle that top layer bearing capacity deficiency, depths mucky soil thickness are thicker, the ground under the effect of large tracts of land uniform load, particularly conventional construction of structures or harbour, airport, warehouse logistics base etc.
For reaching above purpose, solution of the present invention is:
The method for processing foundation of an a kind of intubate, multipass vacuum well-point dewatering dynamic consolidation comprises:
1, the method for processing foundation of intubate of employing, multipass vacuum well-point dewatering dynamic consolidation meets design requirement bearing capacity of foundation soil substantially, has the diffusion effect that certain thickness " crust layer " increases subsidiary stress by top layer formation, regulating action by " crust layer " reduces the relative settlement under the load action, make " crust layer " in whole place reach compatibility of deformation, the double requirements of bearing capacity of foundation soil and distortion is finally satisfied in acting in conjunction.
2, adopt an intubate of suitable design parameters, the construction technology of multipass vacuum well-point dewatering, at first underground water is dropped to the water level of designing requirement, and then pull out a part of vacuum well point water pipe, carry out the strong rammer of the suitable energy level of first pass, other do not pull out vacuum well point water pipe continuation precipitation in the strong rammer process and after rammer is finished by force, water level carries out strong the rammer second time after reaching requirement, and so order is carried out, until reaching designing requirement.
3, the principle of intubate, the design of multipass vacuum well-point dewatering is: the filter of vacuum well point water pipe is wanted and can be met design requirement, the filter screen parcel is tight, filter screen can play a role in filtering really, stop to extract out in the vacuum-dewatering process a large amount of silt, the underground soil layer thereby artificial destruction is found time, in pore forming process, increase punching hole diameter as far as possible, punching can be inserted well casing after reaching projected depth, backfill medium sand around the well casing, after being backfilling into desired depth, can carry out the top tube sealing by the backfill clay, the backfill clay is real towards puddling with instrument, prevents to leak gas around the well casing.On-the-spot horizontal coupled pipe is arranged the needs that will be beneficial to later stage place construction, be convenient to machine-walking, can adjust the outlet layout of horizontal coupled pipe according to concrete needs at any time in work progress, with coordinative construction.
4, the strong energy level that rams will determine that tamping pit ponding, preventing water phenomenon can not occur in the work progress according to the instructions for use in place and concrete geological conditions, guarantees that as far as possible strong construction of ramming is more than water level.
5, for service condition than higher, the precipitation place of difficulty relatively, strong ram full when ramming construction the top layer lay rubble and/or the sandstone of 30～50cm, make the top layer be improved the compactness on top layer by compacted and displacement, satisfy instructions for use.
6, method for designing principle of the present invention is: at first carry out the vacuum well-point dewatering design according to the concrete geological conditions in place, determine intubation length, the chimney filter length of vacuum well point water pipe, the intubate spacing, the type of vacuum well point water pipe is selected pvc pipe or steel pipe according to the soil layer condition; Carry out the vacuum pumping test, judge whether the place needed to improve the place closure by pre-rammer before intubate; If vacuum does not reach 70～80kPa in the vacuum pump process, determine again to select the strong rammer of suitable energy level that the place is rammed in advance.Bearing capacity and use settlement request according to upper load designs strong rammer then, lay the spacing of vacuum well point water pipe and the construction requirement of dynamic consolidation construction machinery according to the scene, the quantity and the position of the vacuum well point water pipe that definite needs are pulled out, assurance can not influence construction speed and can restrain the rise of water level in work progress, reaches the consolidation effect of strong rammer.At last according to the reinforcing situation on top layer, place and instructions for use determine whether the place completely ram before coarse aggregate materials such as needs backfill rubble and sandstone.
7, construction technology of the present invention: carry out the vacuum well-point dewatering construction earlier, increase the degree of depth and the efficient of precipitation as far as possible, if effect is not ideal in the precipitation process, drawdown can according to circumstances be adjusted length, spacing and the chimney filter length, the material that plug the vacuum well point water pipe at need, continue construction then, reach designing requirement up to water level; According to the arrangement pitch and the position of vacuum well point water pipe, the position and the quantity of the definite vacuum well point water pipe that need pull out are carried out the strong construction of ramming of first pass then, and once construction reaches the design ceasing driving standard, the leveling place; Other vacuum well points water pipes continue precipitation, carry out dynamic consolidation construction again second time after reaching the water level requirement; Until reaching designing requirement.Last place integral body flattens and rolls, and the top layer reaches the compactness requirement of design; Pay superstructure unit and carry out basis and superstructure construction.
Method for processing foundation implementation step of the present invention comprises:
1, data collection, comprise place matter data and the situation of periphery and the basic engineering and the service load data of superstructure, mainly be the transmission coefficient of each soil layer of place, sealing on every side, whether exist the buried depth, the size of service load etc. on dark creek, basis.
2, in conjunction with geologic information, superstructure design and load data, particularly the transmission coefficient of each layer of place soil and periphery have or not various situations such as gas leakage to determine to plug the degree of depth of vacuum well point water pipe, the length of spacing and chimney filter, the laying mode of horizontal coupled pipe, it specifically is buried depth according to each soil layer, transmission coefficient is determined the degree of depth of vacuum well point water pipe, and the length of chimney filter, buried depth according to the basis, top, what load was determined strong arrangement pitch that rams tamping point and well point pipe plugs spacing and arrangement, determine the laying mode of horizontal coupled pipe according to the convenience that fabric structure is arranged and machinery passes in and out in place, determine each quantity and position simultaneously all over the vacuum well point water pipe that needs before ramming by force to pull out, it mainly determines the quantity and the position of the vacuum well point water pipe that need pull out according to the speed of the effect of precipitation and rising of groundwater level, carry out the construction of vacuum well-point dewatering subsequently.
3, (water level that will beg to surrender was determined according to strong energy level that rams and soil layer condition after precipitation reached the water level of designing requirement, purpose is to guarantee the strong consolidation effect and the degree of depth of ramming), pull out partial vacuum well point water pipe according to designing requirement, the construction of ramming by force in the zone of pulling out the vacuum well point water pipe, the strong energy level that rams is according to the service load on basis, top, settlement request and place can precipitation lowest water level determine, other zones after pulling out partial vacuum well point water pipe and connecting again promptly at first pass (perhaps second, the 3rd time) continue the vacuum well-point dewatering construction in the dynamic consolidation construction process.
4, the result according to the field trial construction determines whether to receive hammer, finishes the first pass dynamic consolidation construction, flattens the place subsequently, after the precipitation water level reaches designing requirement, carries out second time strong construction of ramming.
5, finish each time vacuum well-point dewatering and strong the rammer successively after, place integral body flattens, whether the bearing capacity of check ground reaches designing requirement (is detected bearing capacity of foundation soil no show designing requirement if finish the construction back, again intubate precipitation as the case may be, carry out multipass well-points dewatering and strong the rammer, until reaching designing requirement), wait to satisfy the certain pause after date and carry out ground again and handle to detect, handle the degree of consolidation that the modulus that detects the back carries out determining after the settlement calculation soil body according to ground.
6, according to the concrete instructions for use in the reinforcing situation on top layer and place judge the top layer whether coarse aggregates such as needs backfill rubble, sandstone carry out compacted and whether displacement (needs the backfill coarse aggregate mainly to determine according to the result that ground is handled, reaching designing requirement can not backfill coarse aggregate), roll in last place or full the rammer constructed, degree of compaction reaches corresponding requirement, finishes construction and detects back payment top foundation construction.
Intubate, a multipass vacuum-dewatering are a kind of new vacuum-dewatering method for designing and design concepts, it is the same with vacuum-dewatering design in the past, the same degree of depth that requires design must satisfy precipitation requires and area requirement, the special process that different is by intubate, multipass precipitation further improves the efficient and the speed of application of precipitation.
Adopted above technical scheme, the present invention has following beneficial effect: the present invention can be applicable to the ground of engineerings such as service load is less, the load action area is bigger cargo container stockyard, airport, port and pier, warehouse and handles, and a kind ofly specifically solves that top layer bearing capacity deficiency, depths mucky soil thickness are thicker, the new method of the big problem of differential deformation under the effect of large tracts of land uniform load.Can give full play to the advantage of vacuum well-point dewatering and dynamic compaction, vacuum well-point dewatering solves the strong consolidation effect that rams and the problem of soil solidifying.Strong rammer solves the shallow layer foundation bearing capacity and the top layer forms certain thickness " crust layer ", solves the problem of uneven settlement of foundation by the stress diffusion.When the one-tenth panel region that particularly service load is not high, the load action area is bigger is carried out the ground Treatment Design, adopt this method to meet design requirement substantially by bearing capacity of foundation soil, has the diffusion effect that certain thickness " crust layer " increases subsidiary stress by top layer formation, regulating action by " crust layer " reduces the relative settlement under the load action, make " crust layer " in whole place reach compatibility of deformation, the double requirements of bearing capacity of foundation soil and distortion is finally satisfied in acting in conjunction.Reinforce owing to adopt vacuum well-point dewatering and dynamic compaction can solve the large tracts of land ground, thus cost and duration equal provinces.
Description of drawings
Fig. 1 is the design and construction process flow chart of intubate of the invention process, multipass vacuum well-point dewatering dynamic consolidation method for processing foundation.
Fig. 2 is an intubate of the present invention, multipass vacuum well-point dewatering intubation procedure and the schematic diagram that rams points distributing method one by force.
Fig. 3 is an intubate of the present invention, multipass vacuum well-point dewatering intubation procedure and the schematic diagram that rams points distributing method two by force.
The numbering of well point pipe 1., 2., 3. be mapped with the first pass tamping point of tamping point figure, second time tamping point etc. is represented vacuum well point water pipe which time need be pulled out and which meaning all over the tamping point that can construct respectively among the figure.
The specific embodiment
The present invention is further illustrated below in conjunction with the accompanying drawing illustrated embodiment.
Process synthesis of the present invention is strong to be rammed and intubate, multipass vacuum well-point dewatering advantage separately, utilize intubate, a multipass vacuum well-point dewatering to reduce water level, quicken the dissipation of soil solidifying and pore water pressure, give full play to advantage and effect that strong rammer is handled, the top layer forms " crust layer " of certain thickness and intensity, has the advantage that the differential settlement distortion is coordinated more.
Fig. 2～Fig. 3 is two kinds of different vacuum well point water pipes of the present invention and the strong relative schematic diagram of layouting that rams.In the specific implementation, according to the arrangement pitch and the mode of vacuum well point water pipe, can adopt different tamping site arranging methods to carry out the ground Treatment Design.In the specific implementation, carry out the dewatering construction of vacuum well point water pipe earlier, and then ram by force layouting and constructing, carry out the processing construction on top layer, place at last.
Certain engineering is large warehoused land used foundation treatment engineering, use because the place will be used as goods yard, so load is the large tracts of land load that load itself is little and effect is more even, but the differential settlement of ground is required relatively strictness relatively.This engineering foundation clay distribution situation is: I laminin fill stratum: the about 0.2～1m of thickness, and the top is the thick cultivated soil of 20cm, and soil nature is pressed from both sides plant roots and stems based on silty clay, and the subregion contains a large amount of rubbles, queen closer.II layer farinose argillic horizon: strand～estuarine facies deposition, plastic～soft-plastic state, middle compressibilty, bed thickness 1.2m～1.8m.III layer mud matter farinose argillic horizon: strand～shallow-sea facies deposition, grey, stream is moulded state, high-compressibility, bed thickness 6.0m～8.1m.IV layer silt clay layer: strand～shallow-sea facies deposition, grey, stream is moulded state, high-compressibility, bed thickness 8.2m～10.5m.It all is a farinose argillic horizon to basement rock down.
In this engineering, the emphasis that ground is handled carries out shallow layer reinforcement to ground to be handled, solve the bearing capacity of the loose fill stratum of superficial part and the ground problem of non-uniform that all kinds of dark creek, Gou Tang cause, the intensity of soil layer in the certain depth scope of the face of land is effectively improved, form certain thickness crust layer, strengthen bulk deformation harmony, satisfy the requirement of subsequent design foundation strength and distortion.Therefore, the basic principle of this place ground Treatment Design is: (1) utilizes the bearing capacity of upper soil horizon to reduce the workload that ground is handled as far as possible; (2) can be fit to the natural conditions of this engineering function of use, only carry out necessary shallow-layer and handle; (3) reinforcement process and equipment are simple, and cost is low; (4) duration lacks, builds up soon, brings benefits as early as possible; (5) strive accomplishing advanced technology, economical rationality, safe and reliable, ensure the quality of products, protect environment.
Concrete implementation step is as follows:
(1) at first lays the vacuum well point water pipe, according to the static sounding curve in the exploration report as can be known, the degree of depth of this place about 6m～7m exists a stratified sand layer, and this layer horizontal permeation coefficient is bigger, and requires water level to drop to the consolidation effect that below ground 4m does not just influence strong tamping point rammer.Therefore, the vacuum well point water pipe plugs the degree of depth and is decided to be about 6m, and according to the water outlet effect and the Water Level Control situation of on-the-spot pumping test, the vacuum well point water pipe is that the square net shape of 5.0m * 5.0m is arranged, and the vacuum well point water pipe is numbered.The vacuum well point water pipe bury pore-forming underground with impact type rotary drill pore-forming.
(2) finish burying underground and after house steward's installation connects, starting vacuum pump and draw water of all vacuum well point water pipes, in time measure WATER LEVEL CHANGES in the observation well.
(3) place underground water drops to the water level and after a period of stabilisation of designing requirement, pull out corresponding numbering vacuum well point water pipe 1., be not less than 120kPa according to large tracts of land bearing capacity in this place use, relative settlement is not more than the instructions for use of 10cm, determine that first pass carries out the strong tamping point rammer construction of 1500kN.m energy level, other vacuum well point water pipes of not pulling out continue to keep precipitation, after ramming and finish, the strong tamping point of first pass in time flattens the place, for the second time precipitation is pulled out corresponding numbering vacuum well point water pipe 2. after reaching the water level of designing requirement again, carry out the construction that the strong tamping point of 1200kN.m energy level rams for second time, construct in order successively later on, a little the layout of tamping point determine according to the layout of vacuum well point water pipe.
(4) finish all dynamic consolidation constructions after, the place flattens, and the compactness that reaches designing requirement is rolled on the top layer, and bearing capacity and relative settlement detect and all meet design requirement, it is compacted not need to determine the backfill coarse aggregate to carry out the top layer, therefore detects qualified back and submits superstructure and foundation construction to.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art should be within protection scope of the present invention for improvement and modification that the present invention makes according to announcement of the present invention.
Claims (6)
1, a kind of method for processing foundation, it is characterized in that: adopt the dynamic compaction of suitable energy level and intubate, multipass vacuum well-point dewatering process combined, the acceleration excess pore water pressure dissipates, formation has certain thickness top " crust layer ", reach and satisfy the ground requirement for bearing capacity, and the regulating action by " crust layer " reduces the relative settlement under the load action, makes " crust layer " in whole place reach the purpose of compatibility of deformation.
2, method for processing foundation as claimed in claim 1, it is characterized in that: it may further comprise the steps:
1) data collection;
2) integrating step 1) in the data of collecting determine to plug the length of the degree of depth, spacing and chimney filter of vacuum well point water pipe and the laying mode of horizontal coupled pipe, determine quantity and position of the vacuum well point water pipe that need pull out before each is all over strong the rammer simultaneously;
3) vacuum well-point dewatering construction is to the water level that reaches designing requirement, according to step 2) requirement pull out partial vacuum well point water pipe, and carry out dynamic consolidation construction in the zone of pulling out the vacuum well point water pipe, all the other vacuum well point water pipes continue vacuum well-point dewaterings construction;
4) after dynamic consolidation construction is finished, the leveling place;
5) repeating step 3), 4) finish whole vacuum well-point dewatering and strong rammer the, the whole leveling in place.
3, method for processing foundation as claimed in claim 2, it is characterized in that: after bearing capacity of foundation soil reaches designing requirement, further judge according to the concrete instructions for use in the reinforcing situation on top layer and place whether needs backfill coarse aggregate is to carry out compacted and displacement on the top layer, carry out subsequently that the place is rolled or fullly ram construction.
4, method for processing foundation as claimed in claim 2, it is characterized in that: the data of described collection relates to the basic engineering and the service load data of construction plant geologic information, peripheral situation, superstructure, specifically comprise the transmission coefficient of each soil layer of place, on every side sealing, whether exist the buried depth, the size of service load on dark creek, basis.
5, method for processing foundation as claimed in claim 2 is characterized in that: the degree of depth of described vacuum well point water pipe and chimney filter length are determined according to each soil layer buried depth, transmission coefficient; The spacing of vacuum well point water pipe and arrangement are determined according to buried depth, the load on basis, top; The laying mode of horizontal coupled pipe is arranged according to fabric structure and machinery passes in and out easily mode and determines; Each is determined according to the effect and the rising of groundwater level speed of precipitation all over the quantity and the position of the vacuum well point water pipe that need pull out before ramming by force.
6, method for processing foundation as claimed in claim 2 is characterized in that: the water level of described requirement is determined according to strong rammer energy level and soil layer condition; The strong energy level that rams is then determined according to the lowest water level of service load, settlement request and the place precipitation on basis, top.
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| CNA2009100534582A CN101591906A (en) | 2009-06-19 | 2009-06-19 | The method for processing foundation of intubate, multipass vacuum well-point dewatering dynamic consolidation |
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| CNA2009100534582A CN101591906A (en) | 2009-06-19 | 2009-06-19 | The method for processing foundation of intubate, multipass vacuum well-point dewatering dynamic consolidation |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806056A (en) * | 2010-04-28 | 2010-08-18 | 郭艳景 | Soft-soil foundation treatment method for controlling secondary consolidation settlement |
| CN103290836A (en) * | 2013-07-02 | 2013-09-11 | 江西省地质工程(集团)公司 | Vacuum decompression compacting and consolidating construction method for soft foundation treatment |
| CN107687118A (en) * | 2017-08-31 | 2018-02-13 | 中建三局第建设工程有限责任公司 | The forming method of hydraulic reclamation region saturated soft soil roadbed |
| CN111719347A (en) * | 2020-06-09 | 2020-09-29 | 中铁第四勘察设计院集团有限公司 | Foundation treatment method and device |
| CN111809603A (en) * | 2019-04-10 | 2020-10-23 | 上海港湾基础建设（集团）股份有限公司 | High-vacuum densification soft foundation treatment method |
| CN112921947A (en) * | 2021-03-23 | 2021-06-08 | 夏妙水 | Foundation construction method in house building construction |
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2009
- 2009-06-19 CN CNA2009100534582A patent/CN101591906A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806056A (en) * | 2010-04-28 | 2010-08-18 | 郭艳景 | Soft-soil foundation treatment method for controlling secondary consolidation settlement |
| CN101806056B (en) * | 2010-04-28 | 2011-07-20 | 郭艳景 | Soft-soil foundation treatment method for controlling secondary consolidation settlement |
| CN103290836A (en) * | 2013-07-02 | 2013-09-11 | 江西省地质工程(集团)公司 | Vacuum decompression compacting and consolidating construction method for soft foundation treatment |
| CN103290836B (en) * | 2013-07-02 | 2015-07-15 | 中建城开建设集团有限公司 | Vacuum decompression compacting and consolidating construction method for soft foundation treatment |
| CN107687118A (en) * | 2017-08-31 | 2018-02-13 | 中建三局第建设工程有限责任公司 | The forming method of hydraulic reclamation region saturated soft soil roadbed |
| CN111809603A (en) * | 2019-04-10 | 2020-10-23 | 上海港湾基础建设（集团）股份有限公司 | High-vacuum densification soft foundation treatment method |
| CN111719347A (en) * | 2020-06-09 | 2020-09-29 | 中铁第四勘察设计院集团有限公司 | Foundation treatment method and device |
| CN111719347B (en) * | 2020-06-09 | 2022-03-11 | 中铁第四勘察设计院集团有限公司 | Foundation treatment method and device |
| CN112921947A (en) * | 2021-03-23 | 2021-06-08 | 夏妙水 | Foundation construction method in house building construction |
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Open date: 20091202 |