CN101215832B - Directly discharging type vacuum prepressing ground foundation treatment method - Google Patents
Directly discharging type vacuum prepressing ground foundation treatment method Download PDFInfo
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- CN101215832B CN101215832B CN2007103060729A CN200710306072A CN101215832B CN 101215832 B CN101215832 B CN 101215832B CN 2007103060729 A CN2007103060729 A CN 2007103060729A CN 200710306072 A CN200710306072 A CN 200710306072A CN 101215832 B CN101215832 B CN 101215832B
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Abstract
The invention discloses a direct-drainage vacuum pre-pressing groundwork treatment method, which comprises: a main pipe is arranged in a vacuum device, a plurality of branch pipes are divided from the main pipe, each branch pipe is connected to a drainage plate through connection pipe to directly draw out the water inside the drainage plate. The treatment method of the invention avoids the use of horizontal drainage sand pad layer, vacuum filtrate pipe and film, and directly connects the plastic drainage plate in soft groundwork with the vacuum pipe by use of connection pipes, thereby greatly reducing the vacuum pressure transmission loss, improving vacuum transmission effect and strengthening effect, and lowering consolidating cost.
Description
Technical field
The present invention relates to the Foundation Design technical field, a kind of specifically vacuum prepressing ground foundation treatment method.
Background technology
The present vacuum preloading processing method that treatment of soft foundation is adopted, it is the horizontal sand cushion of laying on soft foundation, insert band drain, connect to be embedded in by vacuum plant and be responsible in the sand cushion and the arm of chimney filter composition, moisture in the soft foundation is extracted out by band drain, sand cushion, worry pipe, the person in charge, reached the purpose of reinforcing soft ground.The transmittance process of vacuum pressure is: the vacuum plant → person in charge → arm (chimney filter) → sand cushion → band drain → soil mass consolidation.Vacuum pressure is subjected to sand cushion and vacuum to consider the damping action of pipe, filter membrane in transmittance process, and power loss is very big.Field data shows that vacuum pump outlet pressure is 96kPa, and through the person in charge, when chimney filter arrives sand cushion, vacuum pressure is reduced to 80～90kPa, when reaching band drain 3m depths by sand cushion, has only 50～60kPa, and loss late reaches more than 30%.Emphasis of the present invention is at the defective that exists in the said method, and a kind of high efficiency vacuum prepressing ground foundation treatment method is provided.
Summary of the invention
Purpose of the present invention is for providing a kind of high efficiency directly discharging type vacuum prepressing ground foundation treatment method.
The technical scheme that realizes the foregoing invention purpose is as follows:
Directly discharging type vacuum prepressing ground foundation treatment method is provided with the person in charge on vacuum plant, tell some arms on the person in charge, and each arm is connected with band drain by tube connector.
Directly discharging type vacuum prepressing ground foundation treatment method of the present invention has been removed in the existing processing method horizontal drainage sand cushion and vacuum and has been considered pipe, filter membrane, directly band drain and vacuum tube are linked with tube connector, significantly reduced the linear loss that vacuum pressure transmits, improve vacuum and transmitted usefulness and consolidation effect, reduced the reinforcing expense.
Description of drawings
Fig. 1 is the structural representation of equipment in the inventive method
The specific embodiment
Below in conjunction with the drawings and specific embodiments technical solution of the present invention is described further.
As shown in Figure 1, directly discharging type vacuum prepressing ground foundation treatment method, on vacuum plant 1, be provided with and be responsible for 2, the person in charge 2 passes the diaphragm seal 3 on top, be laid in the working cushion layer 7 of foundation surface, be responsible on 2 and tell some arms 4, each arm 4 is connected with band drain 6 by tube connector 5, and the moisture in the band drain 6 is directly extracted out.
Further, each vacuum plant, the person in charge and arm are formed a vacuum unit in the inventive method, and each vacuum preloading district can be made of one or more vacuum units in processing method of the present invention.
Below technical solution of the present invention and technique effect thereof are explained in detail.
(1) transmits vacuum pressure and horizontal drainage without sand cushion, lower the transmission loss of vacuum preloading energy
Vacuum preloading method commonly used need be laid the sand cushion that a layer thickness is 50～100cm at surface layer, and main rising transmitted vacuum pressure and horizontal drainage double action, therefore, sand cushion quality requirement height adopts medium coarse sand usually, mud content requires less than 5%, and dry density is greater than 1.5t/m
3To keep the even of sand cushion thickness during laying, fully cover the vacuum chimney filter, make vertical drainage plate, chimney filter, form a complete vacuum pressure transmission system and a drainage system by sand cushion.The directly discharging type vacuum prepressing method directly links to each other with band drain with tube connector, does not need to transmit vacuum pressure and horizontal drainage by sand cushion, therefore, can reduce resistance behind the cancellation sand cushion.
(2) the directly discharging type vacuum prepressing method can shorten bang path, improves deep layer weak soil action effect
Tube connector can be inserted certain depth in the plastic draining board and (can reach under the film 0～3m) at present.Help shortening the vacuum pressure bang path, reduce the transmission loss of vacuum energy in band drain, improve the action effect of vacuum preloading the deep layer weak soil
(3) directly discharging type vacuum prepressing requires to reduce to diaphragm seal
Directly discharging type vacuum prepressing method, vacuum pressure are to be directly delivered in the plastic draining board by pipeline, and be therefore low relatively for the seal request on top layer, diaphragm seal can be kept to 2 layers.If in the vacuum combined stack-load process, cause partially sealed not sternly, can not cause serious consequence yet.
(4) directly discharging type vacuum prepressing can be formed the vacuum pre-press reinforcing system by one or more independently vacuum units, reduces the influence of corrective maintenance to whole ground strengthening quality
Vacuum method commonly used needs through sand cushion, band drain vacuum pressure to be delivered in the weak soil, and whole vacuum transmission system must communicate.The directly discharging type vacuum prepressing method can utilize a pump or several pumps to form the independent vacuum subsystem.Vacuum pre-press reinforcing district can by several independently vacuum sub-system form.Each subsystem carries out independent loads to the institute control area, is not subjected to the interference of other subsystem.It is advantageous that when local gas leakage or equipment fault occurring, can be separately the sealing of the equipment of subsystem and control zone is checked or keeped in repair.Can not influence other zone in the stabilization zone.
(5) the directly discharging type vacuum prepressing efficiency improves efficiency, reduces the equipment consumption
Vacuum method regulation and stipulation commonly used, sealing film vacuum pressure down reach 80kpa, need average 1000m
2Reinforce area the vacuum pump of a 7.5kw is installed.Adopt the directly discharging type vacuum prepressing method, reach same consolidation effect, only need 1500～2000m according to test
2Area is installed the vacuum pump of a 7.5kw power, and efficiency improves 1.5 times.
Claims (1)
1. directly discharging type vacuum prepressing ground foundation treatment method, it is characterized by: on vacuum plant, be provided with the person in charge, the person in charge passes the diaphragm seal on top, be laid in the working cushion layer of foundation surface, tell some arms on the person in charge, each arm is connected with band drain by tube connector, and the moisture in the band drain is directly extracted out, does not need to transmit vacuum pressure and horizontal drainage by sand cushion;
Described vacuum plant, the person in charge and arm are formed a vacuum unit, each vacuum preloading zone has one or more vacuum units in described directly discharging type vacuum prepressing ground foundation treatment method, utilize a pump or several pumps to form the independent vacuum subsystem, a vacuum pre-press reinforcing district is made up of some independently vacuum sub-system, each subsystem carries out independent loads to the institute control area, is not subjected to the interference of other subsystems;
Described band drain is a plastic draining board;
Described vacuum pressure is directly delivered in the plastic draining board by pipeline, lays 2 layers of diaphragm seal above the described person in charge;
Tube connector is inserted certain depth in the plastic draining board, and the described degree of depth can reach 0～3m under the described diaphragm seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007103060729A CN101215832B (en) | 2007-12-29 | 2007-12-29 | Directly discharging type vacuum prepressing ground foundation treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007103060729A CN101215832B (en) | 2007-12-29 | 2007-12-29 | Directly discharging type vacuum prepressing ground foundation treatment method |
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| Publication Number | Publication Date |
|---|---|
| CN101215832A CN101215832A (en) | 2008-07-09 |
| CN101215832B true CN101215832B (en) | 2010-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007103060729A Active CN101215832B (en) | 2007-12-29 | 2007-12-29 | Directly discharging type vacuum prepressing ground foundation treatment method |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103132503B (en) * | 2011-12-01 | 2015-09-02 | 上海市基础工程集团有限公司 | For the membrane linkage of vacuum pump and vacuum diaphragm drainage pipe |
| CN102535431B (en) * | 2012-03-14 | 2014-09-17 | 天津港(集团)有限公司 | Method for quickly forming blown and filled ultra-soft soil foundation surface layer duricrust and device for realizing method |
| CN103336105B (en) * | 2013-06-18 | 2015-03-25 | 浙江工业大学 | Soft foundation treatment experiment device and method |
| CN103388330B (en) * | 2013-07-31 | 2015-09-23 | 河海大学 | Pump-drainage type vacuum prepressing reinforcement soft base method |
| CN103541345B (en) * | 2013-10-15 | 2015-11-25 | 梁永根 | Aqueous vapor separate vacuum preloading and device |
| CN104612129A (en) * | 2015-01-26 | 2015-05-13 | 刘春原 | Quick vacuum drainage device under high fill subgrade |
| CN109423990A (en) * | 2017-08-31 | 2019-03-05 | 山东安澜工程建设有限公司 | Soft foundation in water conservancy project sand mat of subgrade processing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1624252A (en) * | 2004-09-10 | 2005-06-08 | 任再永 | Vacuum net water suction method and special water drainage board |
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- 2007-12-29 CN CN2007103060729A patent/CN101215832B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1624252A (en) * | 2004-09-10 | 2005-06-08 | 任再永 | Vacuum net water suction method and special water drainage board |
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Application publication date: 20080709 Assignee: China Harbour Engineering Co., Ltd. Assignor: China Communication Planning and Design Institute for Waterway Transportation Co Contract record no.: 2015990000260 Denomination of invention: Directly discharging type vacuum prepressing ground foundation treatment method Granted publication date: 20100609 License type: Exclusive License Record date: 20150429 |
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