CN109826203A - The support system of fender post and water-stop curtain building-in depth Length discrepancy - Google Patents
The support system of fender post and water-stop curtain building-in depth Length discrepancy Download PDFInfo
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- CN109826203A CN109826203A CN201910171081.4A CN201910171081A CN109826203A CN 109826203 A CN109826203 A CN 109826203A CN 201910171081 A CN201910171081 A CN 201910171081A CN 109826203 A CN109826203 A CN 109826203A
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- fender post
- stop curtain
- foundation pit
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Abstract
The present invention relates to the support systems of a kind of fender post and water-stop curtain building-in depth Length discrepancy, and including station main structure, fender post and the water-stop curtain in foundation pit, fender post and water-stop curtain were arranged along station main structure outer profile one week, are closed foundation pit；Fender post is located on the inside of water-stop curtain, maintains an equal level at the top of fender post and water-stop curtain, goes along with sb. to guard him pile length greater than water-stop curtain；Longitudinal crown beam and lateral concrete support are provided at the top of fender post.The present invention uses fender post+water-stop curtain+inner support support system, is provided with crown beam and concrete barricade at the top of fender post, capping beam is provided between crown beam and main structure, undertakes anti-floating effect；Underground water drawdown on the outside of foundation pit can be kept minimum under the conditions of meeting base pit dewatering drawdown using water-stop curtain, effectively control influence of the base pit dewatering to surrounding enviroment.
Description
Technical field
The invention belongs to the support technology fields of subway engineering, and in particular to a kind of fender post and water-stop curtain building-in depth
The support system of Length discrepancy.
Background technique
Subway foundation pit refers to carry out the space of below ground that the construction of subway is excavated, after excavation, subway foundation pit
Surrounding generates multiple free faces, constitutes foundation pit containment body, certain one side of foundation pit containment body is known as foundation pit side-wall by us.
The excavation of subway foundation pit necessarily affects to surrounding enviroment, to guarantee underground construction structure and foundation pit week
The safety of surrounding environment, to support, reinforcing and safeguard measure that foundation pit side-wall and surrounding enviroment use, here it is pattern foundation pit supporting structures.
Currently, with the investment of each big city metro project in the whole nation, the base pit engineering of construction project in quantity, is excavated
Depth, square size and the development that high speed is all obtained using field etc., deep big foundation pit is very universal, traditional slope
Excavation technology and a small amount of steel sheet pile support technology of use have been difficult to ensure underground construction structure and subway foundation pit surrounding enviroment
Safety.
Subway foundation pit engineering in general is located at the area of building dense, environment complexity, after the accidents such as collapse, will make
At huge personnel, property loss, while supporting measure, as temporary supporting structure, the design of its support of base pit engineering again must not
Do not consider economic factor, therefore in the design and work progress of foundation pit supporting project, adaptation to local conditions, reasonable selection reach peace
Entirely, economic harmony is that design, construction personnel will consider the problems of emphatically.
To guarantee that earth excavation and Underground Construction are in " drying " state, code requirement level of ground water should be reduced to base
Excavate 0.5 ~ 1.0m or less of bottom surface in hole.Base pit engineering focus on controlling underground water and therefore caused by periphery earth's surface it is heavy
Drop, under building enclosure and the collective effect of dewatering measure, can satisfy construction requirement, improves the stabilization of foundation pit enclosure structure
Property, the engineering accident of the initiations such as anti-fluid stopping soil, piping and bottom heave.
In city, construction of structures is intensive, underground utilities laying is complicated, and the excessive stratum that will lead to of deepening of ground water table generates position
It moves and deforms, and then jeopardize and build, the safety and normal use of structures and pipeline.Therefore in city underground engineering construction process,
Under the conditions of meeting base pit dewatering drawdown, keep influence of the base pit dewatering to surrounding enviroment minimum, in economy, the base of technological rationality
On plinth, the important topic that influence of the base pit dewatering to surrounding enviroment has become city underground engineering construction is effectively controlled.
Lowering heartn type water-stop curtain is by the water barrier at water-stop curtain insertion foundation pit bottom, inside and outside water-stop curtain partition hole
Level supply is aided with dewatering well in hole using the inside and outside vertical supply in water barrier partition hole.Due to cheating inside and outside hydraulic connection partition,
Pit Discharge is smaller, and precipitation has substantially no effect on surrounding enviroment.But when hole, relative water resisting layer buried depth in bottom is very big, is stopped using lowering heartn type
Water curtain cost is higher and quality is difficult to ensure, or hole bottom without relative water resisting layer when, suspension type water-stop curtain need to be used.Due to hole
Inside and outside hydraulic connection does not separate completely, and in foundation pit when precipitation, the water outside foundation pit can cause under the water level outside foundation pit around flowing in hole
It drops (about 1.5m), Pit Discharge increases, and precipitation has smaller influence to surrounding enviroment.
Summary of the invention
The object of the present invention is to provide the support systems of a kind of fender post and water-stop curtain building-in depth Length discrepancy, are guaranteeing
While overall cost-effective performance and safety coefficient, it is more applicable for complicated foundation pit surrounding environment, is built in the guarantee existing construction in periphery
Under the premise of object safety, safety, the economic existing base pit engineering of carry out.
The technical scheme adopted by the invention is as follows:
The support system of fender post and water-stop curtain building-in depth Length discrepancy, it is characterised in that:
Including station main structure, fender post and the water-stop curtain in foundation pit, fender post and water-stop curtain are along station main body knot
It is arranged within structure outer profile one week, is closed foundation pit；
Fender post is located on the inside of water-stop curtain, maintains an equal level at the top of fender post and water-stop curtain, goes along with sb. to guard him pile length greater than water-stop curtain；
Longitudinal crown beam and lateral concrete support are provided at the top of fender post.
It is whole by the levelling formation of in-network processing between fender post.
Crown beam width at the top of fender post is greater than fender post, sets between the beam section bottom surface inwardly stretched out and station main structure
It is equipped with longitudinal capping beam.
Crown beam top surface is provided with longitudinal concrete barricade and stops the side soil body.
The side plate of station main structure is close to perform with fender post, and there are gaps between water-stop curtain and fender post.
The invention has the following advantages that
(1) using water-stop curtain underground water drawdown on the outside of foundation pit can be kept minimum, effectively controlled under the conditions of meeting base pit dewatering drawdown
Influence of the base pit dewatering processed to surrounding enviroment.
(2) when hole, relative water resisting layer buried depth in bottom is very big, higher using lowering heartn type water-stop curtain cost and quality is difficult to ensure,
Or when cheating bottom without relative water resisting layer, using suspension type water-stop curtain, water-stop curtain length can be effectively reduced, economy is high.Due to
It cheats inside and outside hydraulic connection not separate completely, in foundation pit when precipitation, the water outside foundation pit can lead to the water level outside foundation pit around flowing in hole
Decline (about 1.5m), Pit Discharge increases, although comprehensive analysis precipitation has smaller influence on surrounding enviroment, but from economy angle
Degree considers that these influences are acceptables.
(3) most of foundation pit enclosure stake and water-stop curtain building-in depth are usually isometric setting, and the build-in of fender post is deep
Degree is all longer, and the present invention carries out anti-seepage flow stability computation according to suspension type water-stop curtain, and final water-stop curtain building-in depth need not
With the isometric setting of fender post, water-stop curtain length is effectively reduced.
Detailed description of the invention
Fig. 1 is structure organigram of the invention；
Fig. 2 is the portion A diagrammatic cross-section in Fig. 1；
In figure, 1- fender post, 2- water-stop curtain, 3- crown beam, the support of 4- concrete, 5- bracing members, 6- fashioned iron purlin, 7- capping beam, 8-
Concrete barricade, 9- plain concrete cushion layer, the station 10- main structure, 11- first time excavation face, second of excavation face of 12-, 13- third
Secondary excavation face, the 4th excavation face of 14-, 15- building, 16- municipal pipeline.
Specific embodiment
The present invention will be described in detail With reference to embodiment.
The present invention relates to the support systems of a kind of fender post and water-stop curtain building-in depth Length discrepancy, including the vehicle in foundation pit
Main structure of standing 10, fender post 1 and water-stop curtain 2, fender post 1 and water-stop curtain 2 are along 10 outer profile one of station main structure
Week setting, is closed foundation pit.Fender post 1 is located at 2 inside of water-stop curtain, maintains an equal level at the top of fender post 1 and water-stop curtain 2, fender post 1
Length is greater than water-stop curtain 2.Longitudinal crown beam 3 and lateral concrete support 4 are provided at the top of fender post 1.
It is whole by the levelling formation of in-network processing between fender post 1.The side plate and fender post 1 of station main structure 10 are tight
Patch performs, and there are gaps between water-stop curtain 2 and fender post 1.
3 width of crown beam at 1 top of fender post is greater than fender post 1, the beam section bottom surface inwardly stretched out and station main structure 10
Between be provided with longitudinal capping beam 7.3 top surface of crown beam is provided with longitudinal concrete barricade 8 and stops the side soil body.
When construction:
Fender post 1 and water-stop curtain 2 were arranged along 10 outer profile of station main structure one week, were closed foundation pit, 1 top of fender post
It is provided with crown beam 3 and concrete barricade 8；
Excavation of foundation pit uses 100mm thickness in-network processing levelling, sets up concrete branch to first time excavation face 11 between fender post 1
Support 4；
It is excavated to second of excavation face 12, it is levelling using 100mm thickness in-network processing between fender post 1, set up fashioned iron purlin 6
With bracing members 5；
It is excavated to third time excavation face 13, it is levelling using 100mm thickness in-network processing between fender post 1, set up fashioned iron purlin 6
With bracing members 5；
It is excavated to the 4th excavation face 14, it is levelling using 100mm thickness in-network processing between fender post 1, pour plain concrete
Bed course 9 successively pours station main structure 10 from the bottom to top and successively removes steel purlin 6 and bracing members 5；
After pouring to station main structure 10, capping beam 7 is poured between crown beam 3 and station main structure 10, to station
After 10 intensity of main structure reaches design strength 100%, concrete support 4 and concrete barricade 8 are removed, foundation pit is backfilled, restores road surface.
The contents of the present invention are not limited to cited by embodiment, and those of ordinary skill in the art are by reading description of the invention
And to any equivalent transformation that technical solution of the present invention is taken, all are covered by the claims of the invention.
Claims (5)
1. the support system of fender post and water-stop curtain building-in depth Length discrepancy, it is characterised in that:
Including station main structure (10), fender post (1) and the water-stop curtain (2) in foundation pit, fender post (1) and water-stop curtain
(2) it is arranged within outer profile one week along station main structure (10), is closed foundation pit；
Fender post (1) is located on the inside of water-stop curtain (2), maintains an equal level at the top of fender post (1) and water-stop curtain (2), fender post (1) length
Greater than water-stop curtain (2)；
The concrete support (4) of longitudinal crown beam (3) and transverse direction is provided at the top of fender post (1).
2. the support system of fender post according to claim 1 and water-stop curtain building-in depth Length discrepancy, it is characterised in that:
It is whole by the levelling formation of in-network processing between fender post (1).
3. the support system of fender post according to claim 1 and water-stop curtain building-in depth Length discrepancy, it is characterised in that:
Crown beam (3) width at the top of fender post (1) is greater than fender post (1), the beam section bottom surface inwardly stretched out and station main structure
(10) longitudinal capping beam (7) are provided between.
4. the support system of fender post according to claim 1 and water-stop curtain building-in depth Length discrepancy, it is characterised in that:
Crown beam (3) top surface is provided with longitudinal concrete barricade (8) and stops the side soil body.
5. the support system of fender post according to claim 1 and water-stop curtain building-in depth Length discrepancy, it is characterised in that:
The side plate of station main structure (10) is close to perform with fender post (1), exists between water-stop curtain (2) and fender post (1)
Gap.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910171081.4A CN109826203A (en) | 2019-03-07 | 2019-03-07 | The support system of fender post and water-stop curtain building-in depth Length discrepancy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910171081.4A CN109826203A (en) | 2019-03-07 | 2019-03-07 | The support system of fender post and water-stop curtain building-in depth Length discrepancy |
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| CN201910171081.4A Pending CN109826203A (en) | 2019-03-07 | 2019-03-07 | The support system of fender post and water-stop curtain building-in depth Length discrepancy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110453688A (en) * | 2019-08-19 | 2019-11-15 | 中铁十二局集团有限公司 | The excavation method of foundation pit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104775440A (en) * | 2015-04-21 | 2015-07-15 | 五洋建设集团股份有限公司 | Mineshaft-type underground garage deep foundation pit supporting structure |
| WO2018117861A1 (en) * | 2016-12-23 | 2018-06-28 | Statoil Petroleum As | Subsea assembly modularisation |
| CN109208654A (en) * | 2018-10-26 | 2019-01-15 | 中铁第勘察设计院集团有限公司 | The anti-floating system and its construction method that corbel type crown beam is combined with oblique type capping beam |
| CN209798765U (en) * | 2019-03-07 | 2019-12-17 | 中铁第一勘察设计院集团有限公司 | Supporting system with unequal embedded depths of fender post and waterproof curtain |
-
2019
- 2019-03-07 CN CN201910171081.4A patent/CN109826203A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104775440A (en) * | 2015-04-21 | 2015-07-15 | 五洋建设集团股份有限公司 | Mineshaft-type underground garage deep foundation pit supporting structure |
| WO2018117861A1 (en) * | 2016-12-23 | 2018-06-28 | Statoil Petroleum As | Subsea assembly modularisation |
| CN109208654A (en) * | 2018-10-26 | 2019-01-15 | 中铁第勘察设计院集团有限公司 | The anti-floating system and its construction method that corbel type crown beam is combined with oblique type capping beam |
| CN209798765U (en) * | 2019-03-07 | 2019-12-17 | 中铁第一勘察设计院集团有限公司 | Supporting system with unequal embedded depths of fender post and waterproof curtain |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110453688A (en) * | 2019-08-19 | 2019-11-15 | 中铁十二局集团有限公司 | The excavation method of foundation pit |
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