CN101250885A - Construction method for reinforcing subway station side soil body - Google Patents
Construction method for reinforcing subway station side soil body Download PDFInfo
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- CN101250885A CN101250885A CNA2008100356294A CN200810035629A CN101250885A CN 101250885 A CN101250885 A CN 101250885A CN A2008100356294 A CNA2008100356294 A CN A2008100356294A CN 200810035629 A CN200810035629 A CN 200810035629A CN 101250885 A CN101250885 A CN 101250885A
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Abstract
The invention discloses a construction method for reinforcing soil body on one side of a metro station, which comprises the following steps: V1ing, the soil body on one side of the metro station is divided into construction blocks, and the construction blocks are sectionally divided on the longitudinal length of the reinforced soil body. V2ing, the construction blocks are orderly done with a stirring pile reinforcement construction, and a jumping bin construction mode is used when each construction block is constructed. V3ing, when each construction block is constructed, a row of piles which are close to one side of the metro station is firstly constructed and are used as isolation piles, after the row of piles are formed, the outer side of the metro station is constructed, and a jump beating mode is used when the row of piles are constructed. Through optimizing a reinforcing process of a stirring pile soil body, the construction method of the invention uses the mode of partition construction and jumping pin construction, the effect to the metro station when the soil body on one side of the metro station which is reinforced is capable of being effectively solved, and the deformation of the metro station is reduced.
Description
Technical field
The present invention relates to a kind of construction techniques, be specifically related to a kind of newly-built underground construction is carried out soil stabilization in existing subway station one side job practices.
Background technology
Along with the development in city, population increases sharply, and causes vehicle to increase, and brings a series of problems such as traffic congestion, environment pollution and energy crisis to the city.And subway is compared with other vehicles in the city, except avoiding urban ground to crowd and making full use of the space, also has advantages such as freight volume is big, quick and pollution-free.Yet build in the subway station, when especially existing subway station one side being constructed newly-built underground construction, often need to carry out soil stabilization.Conventional soil stabilization job practices has cement mixing method, high-pressure rotary jet grouting pile etc.But the job practices of above-mentioned routine does not all have the deformed Control Technology to existing subway station, will exert an influence to existing subway station in the construction.
Summary of the invention
Technical problem to be solved by this invention provides a kind of construction method for reinforcing subway station side soil body that can effectively solve the subway station distortion, to overcome the above-mentioned defective that prior art exists.
The technical scheme of technical solution problem of the present invention is as follows:
A kind of construction method for reinforcing subway station side soil body is characterized in that, comprises the steps:
(1) the subway station one side soil body is divided the construction piece, carry out segmentation with the longitudinal length for the treatment of soil mass consolidation and divide the construction piece;
(2) successively each construction piece is carried out the agitation pile strengthening construction, adopt the mode of " jumping storehouse " construction when piece is respectively constructed in construction;
(3) each construction piece when construction, a campshed of the most close subway station of construction one side earlier, as isolation pile, treat that this campshed forms after, again to the outside, subway station propelling construction, adopt the mode of beating of jumping during every campshed construction.
By above disclosed technical scheme as can be known, the present invention is by being optimized traditional agitation pile soil stabilization technology, actual conditions in conjunction with the subway station, adopt block construction, jump the storehouse construction also in conjunction with jumping pile driving construction, the method that cooperates Reasonable Parameters, reduced the soil compaction pressure of subway station one side, reduced of the influence of existing reinforcing subway station side soil body, thereby effectively controlled the subway station distortion the station.
Description of drawings
Fig. 1 is a construction sequence flow chart of the present invention.
The specific embodiment
Further specify the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, construction method for reinforcing subway station side soil body of the present invention comprises the steps:
(1) the subway station one side soil body is divided the construction piece, carry out segmentation because the longitudinal length of reinforcing scope is long with the longitudinal length for the treatment of soil mass consolidation and divide the construction piece.
(2) successively each construction piece is carried out the agitation pile strengthening construction, adopt the mode of " jumping storehouse " construction when piece is respectively constructed in construction;
(3) each construction piece when construction, a campshed of the most close subway station of construction one side earlier, as isolation pile, treat that this campshed forms after, again to the outside, subway station propelling construction, adopt the mode of beating of jumping during every campshed construction.The jumping mode of beating of described every campshed adopts the mode of " do and jump five ", and with good conditionsi the employing " done one and jumped eight ".
Described mixing pile construction comprises the steps:
(a) setting-out location is according to construction plot, the position of accurately making each agitation pile;
(b) stir sinking in advance: start mixer motor, mixer is stirred along saddle cut the soil sinking;
(c) stirring whitewashing promotes: after mixer sinks to arriving projected depth, open mortar pump cement paste is pressed in the ground, the rotation while spraying promotes mixer in strict accordance with the hoisting velocity that design is determined simultaneously;
(d) secondary stirs: when mixer is promoted to the end face absolute altitude of the design reinforcement degree of depth, sink to mixer in the soil while rotating once more;
(e) secondary stirs whitewashing and promotes: the mixer secondary is lifted out ground with mixer after sinking down into the design reinforcement degree of depth again, the whipping process mud of spraying water simultaneously;
(f) displacement repeats above-mentioned (a)～(e) step, carries out the construction of next pile again.
Owing to, therefore need to determine rational mixing pile construction parameter, with the influence that reduces to construct to the station near carrying out soil stabilization in the subway station.The appropriate to the occasion construction parameter of routine that adopts earlier of constructing is constructed, and simultaneously the subway station is monitored, and according to monitored data construction parameter is adjusted then.More rational construction parameter is as follows:
| Sequence number | Technical data | Index |
| 1 | Cement (32.5) mixes ratio | 20％ |
| 2 | For the slurry flow | 160L/min～180L/min |
| 3 | Grout coordinate ratio (water: cement) | 1.6～2.0∶1 |
| 4 | Subsidence velocity | 0.25m/min |
| 5 | Hoisting velocity | 0.5m/min |
| 6 | Mixing speed | Stirring-head: 14.5rpm/min in the middle of both sides stirring-head: the 26.0rpm/min |
| 7 | Air pressure | 0.5Mpa |
| 8 | Slurry is pressed | 0.3～0.7Mpa |
By adopting above-mentioned a series of working measure and cooperating above-mentioned construction parameter, can effectively reduce in the reinforcing subway station side soil body process influence to the subway station.
Claims (5)
1. a construction method for reinforcing subway station side soil body is characterized in that, comprises the steps:
(1) the subway station one side soil body is divided the construction piece, carry out segmentation with the longitudinal length for the treatment of soil mass consolidation and divide the construction piece;
(2) successively each construction piece is carried out the agitation pile strengthening construction, adopt the mode of " jumping storehouse " construction when piece is respectively constructed in construction;
(3) each construction piece when construction, a campshed of the most close subway station of construction one side earlier, as isolation pile, treat that this campshed forms after, again to the outside, subway station propelling construction, adopt the mode of beating of jumping during every campshed construction.
2. construction method for reinforcing subway station side soil body according to claim 1 is characterized in that, the jumping mode of beating of described every campshed adopts the mode of doing a jumping five.
3. construction method for reinforcing subway station side soil body according to claim 1 is characterized in that, the jumping mode of beating of described every campshed adopts the mode of doing a jumping eight.
4. according to claim 2 or 3 described construction method for reinforcing subway station side soil body, it is characterized in that described mixing pile construction comprises the steps:
(a) setting-out location, the position of accurately making each agitation pile;
(b) stir sinking in advance;
(c) stirring whitewashing promotes;
(d) secondary stirs;
(e) secondary stirs the whitewashing lifting;
(f) displacement repeats above-mentioned (a)～(e) step, carries out the construction of next pile again.
5. construction method for reinforcing subway station side soil body according to claim 4, it is characterized in that, described step (3) whitewashing promotes and the whitewashing of step (5) secondary promotes, include slurry preparation and carry out the slip casting step, the major parameter scope is as follows in described slurry preparation and the slip casting process: cement mixed ratio is 20%; For the slurry flow is 160L/min～180L/min; The grout coordinate ratio of water and cement is 1.6～2.0: 1; It is 0.3～0.7Mpa that slurry is pressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100356294A CN101250885A (en) | 2008-04-03 | 2008-04-03 | Construction method for reinforcing subway station side soil body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100356294A CN101250885A (en) | 2008-04-03 | 2008-04-03 | Construction method for reinforcing subway station side soil body |
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| CN101250885A true CN101250885A (en) | 2008-08-27 |
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| CNA2008100356294A Pending CN101250885A (en) | 2008-04-03 | 2008-04-03 | Construction method for reinforcing subway station side soil body |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101550692B (en) * | 2009-05-05 | 2011-05-04 | 上海隧道工程股份有限公司 | Constructing method for reinforcing mixing stake around built shield tunnel |
| CN102465526A (en) * | 2010-11-05 | 2012-05-23 | 中铁五局（集团）有限公司 | Construction method for CFG (Cement Fly-ash Grave) pile in deep and loose soft soil layer and soft soil layer |
| CN102535444A (en) * | 2011-12-06 | 2012-07-04 | 中铁十八局集团第五工程有限公司 | Cavern-pile mechanical construction method for shallow subsurface excavated metro station at water-rich sandy stratum |
| CN102926303A (en) * | 2012-11-22 | 2013-02-13 | 河海大学 | Method for reinforcing soft soil foundation settlement control pile foundation bracket of high-grade highway in use |
| CN104032736A (en) * | 2014-06-25 | 2014-09-10 | 上海市建工设计研究院有限公司 | Construction method of cement-soil mixed pile in coral-reef limestone stratum |
-
2008
- 2008-04-03 CN CNA2008100356294A patent/CN101250885A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101550692B (en) * | 2009-05-05 | 2011-05-04 | 上海隧道工程股份有限公司 | Constructing method for reinforcing mixing stake around built shield tunnel |
| CN102465526A (en) * | 2010-11-05 | 2012-05-23 | 中铁五局（集团）有限公司 | Construction method for CFG (Cement Fly-ash Grave) pile in deep and loose soft soil layer and soft soil layer |
| CN102535444A (en) * | 2011-12-06 | 2012-07-04 | 中铁十八局集团第五工程有限公司 | Cavern-pile mechanical construction method for shallow subsurface excavated metro station at water-rich sandy stratum |
| CN102535444B (en) * | 2011-12-06 | 2016-01-13 | 中铁十八局集团第五工程有限公司 | Shallow subsurface excavated metro station at water-rich sandy stratum stake mechanical execution method |
| CN102926303A (en) * | 2012-11-22 | 2013-02-13 | 河海大学 | Method for reinforcing soft soil foundation settlement control pile foundation bracket of high-grade highway in use |
| CN104032736A (en) * | 2014-06-25 | 2014-09-10 | 上海市建工设计研究院有限公司 | Construction method of cement-soil mixed pile in coral-reef limestone stratum |
| CN104032736B (en) * | 2014-06-25 | 2016-05-18 | 上海市建工设计研究院有限公司 | The construction method of cement mixing method in Coral Reef Rock stratum |
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Open date: 20080827 |