CN110195430A - A kind of anti-stacking pressure construction of soft soil treatment method of multidimensional sealing space vacuum water diversion - Google Patents

A kind of anti-stacking pressure construction of soft soil treatment method of multidimensional sealing space vacuum water diversion Download PDF

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Publication number
CN110195430A
CN110195430A CN201910382744.7A CN201910382744A CN110195430A CN 110195430 A CN110195430 A CN 110195430A CN 201910382744 A CN201910382744 A CN 201910382744A CN 110195430 A CN110195430 A CN 110195430A
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CN
China
Prior art keywords
vacuum
multidimensional
preloading
sealing
soil treatment
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CN201910382744.7A
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Chinese (zh)
Inventor
罗炎雄
朱峰
陈炼义
罗捷旋
张添喜
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SHENZHEN ZHONGBANG (GROUP) CONSTRUCTION CONTACT CO Ltd
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SHENZHEN ZHONGBANG (GROUP) CONSTRUCTION CONTACT CO Ltd
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Priority to CN201910382744.7A priority Critical patent/CN110195430A/en
Publication of CN110195430A publication Critical patent/CN110195430A/en
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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
    • E02D3/02Improving by compacting
    • E02D3/10Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains

Abstract

The invention discloses a kind of anti-stacking pressure construction of soft soil treatment methods of multidimensional sealing space vacuum water diversion, it is characterized by: being inserted into drain bar in weak soil, and drain bar is connect with the vacuum manifold of vacuum preloading region surface, vacuum manifold is connected to the vacuum supervisor on vacuum pump, vacuum supervisor top is equipped with geotextiles and sealing film for vacuum preloading regional seal, lower part is carried out after the completion of sealing drains precompressed, extracting groundwater use cofferdam water ballast(ing) out substitutes traditional sand gravity preloading simultaneously, accelerate discharging consolidation of the mud under load action, when vacuumizing precompressed, arrange field observation instrument, observe surface subsidence, horizontal displacement, under-membrance vacuum degree index.The present invention promotes the pore water in the soil body to accelerate to exclude by lower vacuum precompressed and film top water storage piling prepressing, lowers native void water pressure, increases effective stress, accelerates soil solidifying.

Description

A kind of anti-stacking pressure construction of soft soil treatment method of multidimensional sealing space vacuum water diversion
Technical field
The present invention relates to the realm of building construction, at more particularly a kind of anti-stacking pressure soft base of multidimensional sealing space vacuum water diversion Manage construction method.
Background technique
Coastal area disaster geology is dispersed with a large amount of muddy soft soil to guarantee construction in subsequent fields in south China With consolidation settlement after work is greatly lowered, the treatment of soft foundation in place need to be carried out before engineering construction.Traditional treatment of soft foundation side Method has sand piling prepressing concretion method, vacuum preconsolidation method and Vacuum-Surcharge Preloading Method.Sand preloading is logical The method that pre- firming carries out precompressed to soft base of filling out is crossed, reduces or eliminates the settlement after construction of mud in a short time, improves mud The shearing strength and bearing capacity of layer.This method is more mature, and treatment effect is reliable, and major defect is that the duration is long, after processing also There is certain settlement after construction;The action principle and design method of vacuum preconsolidation method are unique different with piling prepressing concretion method Be that piling prepressing is replaced into vacuum preloading, advantage is that the treatment of soft foundation time is short, while can save the preloading earthwork and unload soil Construction time, disadvantage are that soil body sealing is more troublesome, and project cost is higher than preloading.
Summary of the invention
The main purpose of the present invention is to provide one kind by lower vacuum precompressed and film top water storage piling prepressing, adds Fast mud discharging consolidation, can effectively solve the problems in background technique.
To achieve the above object, the present invention provides a kind of anti-stacking pressure construction of soft soil treatment of multidimensional sealing space vacuum water diversion Method, comprising the following steps:
Step 1: vacuum preloading region surface clears up sundries, removes stone, tree root in place, and backfilled with earth flattens place To construction surface absolute altitude;
Step 2: setting up drain bar, sets up vertical drainage plate in vacuum preloading region, and drain bar passes through mud and enters powder Matter argillic horizon is no less than 0.5m;
Step 3: arrangement vacuum pump arranges that a vacuum pump is carried out with pump setting up every 900 ㎡ in drain bar region;
Step 4: vacuum supervisor and vacuum manifold, vacuum manifold setting ground horizontal drainage system: are laid in vacuum preloading region It is responsible for and connects with the vacuum for being communicated to vacuum pump, vacuum manifold is connect by plate tube connector with drain bar;
Step 5: after completing step 4, the cofferdam of high 1.5m is manually built at vacuum preloading regional edge boundary line and blueline;
Step 6: multidimensional vacuum sealing system after being laid with vacuum primary branch, is laid with one layer of geotextiles above vacuum supervisor, The top is laid with two layers of polyvinyl chloride and seals film, and the edge that geotextiles and polyvinyl chloride seal film is imbedded in vacuum boundary press mold ditch On, entire vacuum area is sealed;
Step 7: starting to be vacuumized, and the underground water of extraction is led to water storage on film after starting and forms water ballast(ing) by vacuum preloading;
Step 8: after reaching fully loaded, vacuum preloading region continuously vacuumizes precompressed 90~120 days, and the precompressed end time passes through Final settlement is calculated compared with practical settlement value, the degree of consolidation at certain moment of acquiring soft base under vacuum load action, thus As the criterion for terminating vacuum preloading, when vacuumizing precompressed, arranges field observation instrument, observe surface subsidence, horizontal position It moves, under-membrance vacuum degree index.
As a preferred technical solution of the present invention, the square arrangement of drain bar described in step 2, and drain Spacing between plate is 1m.
As a preferred technical solution of the present invention, the maximum of vacuum pump described in step 3 is 75kw using power.
As a preferred technical solution of the present invention, the supervisor of vacuum described in step 4 uses pvc pipe, and vacuum manifold makes With bellows, vacuum supervisor is connect with vacuum manifold by four-way connection.
As a preferred technical solution of the present invention, vacuum manifold is connected by plate tube connector and drain bar in step 4 It connects, each plate tube connector connects three drain bars.
As a preferred technical solution of the present invention, cofferdam weir body uses packed sand hill, and cofferdam in step 5 Upper width 1m, lower width 4m.
As a preferred technical solution of the present invention, double clay mixing pile is set up as envelope wall in vacuum boundary, And envelope wall insertion mud is no less than 1m, and setting sealing press mold ditch on envelope wall seals film in geotextiles and polyvinyl chloride Side extend on press mold ditch after, backfill press mold ditch using clay, seal film for fixing geotextiles and polyvinyl chloride, will be entire Vacuum area sealing.
The prior art is compared, and the present invention provides have following the utility model has the advantages that the innovative point of the patent of invention is vertically Envelope wall and lateral multi-layer sealed film ensure whole treatment of soft foundation, traditional sand bedding course way are covered with multi-layer sealed film, with level Vacuum tube replaces horizontal sand bedding course as vacuum preloading horizontal drainage channel, ingenious that lower part water is led to top using vacuum preloading Formation water ballast(ing) substitutes traditional sand gravity preloading and is promoted by lower vacuum precompressed and film top water storage piling prepressing Pore water in the soil body accelerates to exclude, and lowers native void water pressure, increases effective stress, accelerates soil solidifying.The present invention is special Benefit is suitable for more meters of deep & thick silt matter treatments of soft foundation of coastal 20-40.
Detailed description of the invention
Fig. 1 is schematic elevation view of the present invention;
Fig. 2 is plate pipe connection schematic diagram of the present invention;
Fig. 3 is geotextiles of the present invention and sealing film scheme of installation;
Fig. 4 is drain bar scheme of installation of the present invention;
Fig. 5 is drain bar mounting plane schematic diagram of the present invention;
In figure: 1. drain bars, 2. vacuum supervisor, 3. vacuum manifolds, 4. vacuum pumps, 5. plate tube connectors, 6. geotextiles, 7. sealings Film, 8. cofferdam, 9. envelope walls.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right The present invention is further elaborated, it should be understood that and the specific embodiments described herein are merely illustrative of the present invention, and It is not used in the restriction present invention.
Schematic diagram disclosed by the invention is as shown in Fig. 1~5, a kind of anti-stacking pressure treatment of soft foundation of multidimensional sealing space vacuum water diversion Construction method is laid on vacuum supervisor 2 and the vacuum manifold on vacuum area surface including the drain bar 1 of insertion mud 3, for the vacuum pump 4 of vacuum preloading, geotextiles 6 and polyvinyl chloride for sealing vacuum area seal film 7, and are located at Vacuum area boundary is used for the cofferdam 8 of region water storage.
A kind of anti-stacking pressure construction of soft soil treatment method of multidimensional sealing space vacuum water diversion, comprising the following steps:
Step 1: vacuum preloading region surface clears up sundries, removes stone, tree root in place, and backfilled with earth flattens place To construction surface absolute altitude;
Step 2: setting up drain bar 1, sets up vertical drainage plate 1 in vacuum preloading region, and drain bar 1 pass through mud into Enter farinose argillic horizon and is no less than 0.5m;
Step 3: arrangement vacuum pump 4 arranges that a vacuum pump 4 is carried out with pump setting up every 900 ㎡ in 1 region of drain bar.
Step 4: setting ground horizontal drainage system is laid with vacuum supervisor 2 and vacuum manifold 3 in vacuum preloading region, very Empty branch pipe 3 is responsible for 2 with the vacuum for being communicated to vacuum pump 4 and is connect, and vacuum manifold 3 is connect by plate tube connector 5 with drain bar 1.
Step 5: after completing step 4, enclosing for high 1.5m is manually built at vacuum preloading regional edge boundary line and blueline Weir 8;
Step 6: multidimensional vacuum sealing system after being laid with vacuum primary branch, is laid with one layer of geotextiles above vacuum supervisor 2 6, the top is laid with two layers of polyvinyl chloride and seals film 7, and the edge that geotextiles 6 and polyvinyl chloride seal film 7 is imbedded in vacuum boundary On press mold ditch, entire vacuum area is sealed;
Step 7: starting to be vacuumized, and the underground water of extraction is led to water storage on film after starting and forms water ballast(ing) by vacuum preloading;
Step 8: after reaching fully loaded, vacuum preloading region continuously vacuumizes precompressed 90~120 days, and the precompressed end time passes through Final settlement is calculated compared with practical settlement value, the degree of consolidation at certain moment of acquiring soft base under vacuum load action, thus As the criterion for terminating vacuum preloading, when vacuumizing precompressed, arranges field observation instrument, observe surface subsidence, horizontal position It moves, under-membrance vacuum degree index.
Preferably, the square arrangement of the drain bar 1, and the spacing between drain bar 1 is 1m, accelerates underground mud In underground water extraction, silt consolidation is also faster.
Preferably, the maximum of the vacuum pump 4 is 75kw using power.
Preferably, the vacuum supervisor 2 uses pvc pipe, and vacuum manifold 3 uses bellows, vacuum supervisor 2 and vacuum manifold 3 are connected by four-way connection.
Preferably, vacuum manifold 3 is connect by plate tube connector 5 with drain bar 1, and each plate tube connector 5 connects three Drain bar 1.
Preferably, 8 weir body of cofferdam uses packed sand hill, and the upper width 1m in cofferdam 8, lower width 4m, can using packed sand hill To prevent the water of the accumulation in cofferdam 8 from leaking out, reduces and use other leakproof wetting systems.
Preferably, double clay mixing pile is set up as envelope wall 9 in vacuum boundary, and envelope wall 9 is embedded in mud No less than 1m, setting sealing press mold ditch on envelope wall 9 are extend on press mold ditch on the side of geotextiles 6 and polyvinyl chloride sealing film 7 Afterwards, press mold ditch is backfilled using clay, seals film 7 for fixing geotextiles 6 and polyvinyl chloride, entire vacuum area is sealed.
Specific processing construction method: setting up drain bar 1 in mud and horizontal drainage vacuum tube is arranged on muck surface, Drain bar 1 is connect with vacuum manifold 3 by plate tube connector 5, and vacuum manifold 3 is connected to the vacuum supervisor 2 on vacuum pump 4, is made With vacuum pump 4 by groundwater mining in mud.It is laid with geotextiles 6 on horizontal vacuum pipe and sealing film 7 carries out vacuum area Closing, vacuum boundary set up clay mixing pile envelope wall 9, setting sealing press mold ditch on envelope wall 9, for fix geotextiles 6 with Film 7 is sealed, entire vacuum bonding region is sealed, discharging consolidation vacuum preloading in lower part is carried out after the completion of sealing.Simultaneously using true The underground water that sky pump 4 extracts is guided within cofferdam 8, and traditional sand gravity preloading is substituted using 8 water ballast(ing) of cofferdam, passes through lower part Vacuum preloading and film top water storage piling prepressing are accelerated discharging consolidation of the mud under load action, are promoted in the soil body Pore water accelerates to exclude, and lowers native void water pressure, increases effective stress, accelerates soil solidifying.When vacuumizing precompressed, arrangement Field observation instrument observes surface subsidence, horizontal displacement, under-membrance vacuum degree index.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its Equivalent thereof.

Claims (7)

1. a kind of anti-stacking pressure construction of soft soil treatment method of multidimensional sealing space vacuum water diversion, comprising the following steps:
Step 1: vacuum preloading region surface clears up sundries, removes stone, tree root in place, and backfilled with earth flattens place To construction surface absolute altitude;
Step 2: setting up drain bar (1), sets up vertical drainage plate (1) in vacuum preloading region, and drain bar (1) is passed through and become silted up Mud layer enters farinose argillic horizon and is no less than 0.5m;
Step 3: arrangement vacuum pump (4) arranges that a vacuum pump (4) carries out with pump setting up every 900 ㎡ in drain bar (1) region;
Step 4: setting ground horizontal drainage system is laid with vacuum supervisor (2) and vacuum manifold (3) in vacuum preloading region, very Empty branch pipe (3) is responsible for (2) with the vacuum for being communicated to vacuum pump (4) and is connect, and vacuum manifold (3) passes through plate tube connector (5) and row Water plate (1) connection;
Step 5: after completing step 4, the cofferdam of high 1.5m is manually built at vacuum preloading regional edge boundary line and blueline (8);
Step 6: multidimensional vacuum sealing system after being laid with vacuum primary branch, is laid with one layer of geotechnique above vacuum supervisor (2) Cloth (6), the top are laid with two layers of polyvinyl chloride sealing film (7), and geotextiles (6) and the edge of polyvinyl chloride sealing film (7) bury On vacuum boundary press mold ditch, entire vacuum area is sealed;
Step 7: starting to be vacuumized, and the underground water of extraction is led to water storage on film after starting and forms water ballast(ing) by vacuum preloading;
Step 8: after reaching fully loaded, vacuum preloading region continuously vacuumizes precompressed 90~120 days, and the precompressed end time passes through Final settlement is calculated compared with practical settlement value, the degree of consolidation at certain moment of acquiring soft base under vacuum load action, thus As the criterion for terminating vacuum preloading, when vacuumizing precompressed, arranges field observation instrument, observe surface subsidence, horizontal position It moves, under-membrance vacuum degree index.
2. a kind of anti-stacking pressure construction of soft soil treatment method of multidimensional sealing space vacuum water diversion according to claim 1, special Sign is: drain bar described in step 2 (1) square arrangement, and the spacing between drain bar (1) is 1m.
3. a kind of anti-stacking pressure construction of soft soil treatment method of multidimensional sealing space vacuum water diversion according to claim 1, special Sign is: the maximum of vacuum pump described in step 3 (4) is 75kw using power.
4. a kind of anti-stacking pressure construction of soft soil treatment method of multidimensional sealing space vacuum water diversion according to claim 1, special Sign is: vacuum described in step 4 is responsible for (2) and uses pvc pipe, and vacuum manifold (3) uses bellows, and vacuum is responsible for (2) and true Empty branch pipe (3) is connected by four-way connection.
5. a kind of anti-stacking pressure construction of soft soil treatment method of multidimensional sealing space vacuum water diversion according to claim 1, special Sign is: vacuum manifold (3) is connect by plate tube connector (5) with drain bar (1) in step 4, each plate tube connector (5) Connect three drain bars (1).
6. a kind of anti-stacking pressure construction of soft soil treatment method of multidimensional sealing space vacuum water diversion according to claim 1, special Sign is: cofferdam (8) weir body uses packed sand hill, and the upper width 1m of cofferdam (8), lower width 4m in step 5.
7. a kind of anti-stacking pressure construction of soft soil treatment method of multidimensional sealing space vacuum water diversion according to claim 1, special Sign is: setting up double clay mixing pile as envelope wall (9) in vacuum boundary, and envelope wall (9) insertion mud is many In setting sealing press mold ditch on 1m, envelope wall (9), press mold ditch is extend on the side of geotextiles (6) and polyvinyl chloride sealing film (7) After upper, press mold ditch is backfilled using clay, it is for fixing geotextiles (6) and polyvinyl chloride sealing film (7), entire vacuum area is close Envelope.
CN201910382744.7A 2019-05-09 2019-05-09 A kind of anti-stacking pressure construction of soft soil treatment method of multidimensional sealing space vacuum water diversion Pending CN110195430A (en)

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Publication number Priority date Publication date Assignee Title
CN111206564A (en) * 2020-01-17 2020-05-29 中铁十九局集团第三工程有限公司 Construction method for consolidating foundation by combining vacuum drainage and water-borne preloading
CN111441336A (en) * 2020-04-24 2020-07-24 曾国海 Composite membrane high vacuum treatment technology for deep soft soil foundation
CN111501727A (en) * 2020-03-31 2020-08-07 温州大学 Device for vacuum preloading treatment of waste slurry of drainage plate and construction process thereof

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CN111501727A (en) * 2020-03-31 2020-08-07 温州大学 Device for vacuum preloading treatment of waste slurry of drainage plate and construction process thereof
CN111441336A (en) * 2020-04-24 2020-07-24 曾国海 Composite membrane high vacuum treatment technology for deep soft soil foundation

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