CN206290269U - The buried Station construction underground moisture section freezing system of rich water sand-pebble layer - Google Patents
The buried Station construction underground moisture section freezing system of rich water sand-pebble layer Download PDFInfo
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- CN206290269U CN206290269U CN201621246851.5U CN201621246851U CN206290269U CN 206290269 U CN206290269 U CN 206290269U CN 201621246851 U CN201621246851 U CN 201621246851U CN 206290269 U CN206290269 U CN 206290269U
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- freezing
- rich water
- pebble layer
- water sand
- frozen fraction
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Abstract
The utility model discloses the buried Station construction underground moisture section freezing system of rich water sand-pebble layer, the buried Station construction underground moisture section freezing system of rich water sand-pebble layer includes：Frozen fraction, non-freezing part and thermal baffle；The frozen fraction is made up of hollow seamless steel pipe, and the frozen fraction plugs base plate lower section AT STATION；The non-freezing part is arranged on the frozen fraction top, and the non-freezing part includes the heat-insulating material of feed tube, liquid back pipe and filling, and the feed tube and liquid back pipe are plugged in the seamless steel pipe respectively；The thermal baffle is arranged between the frozen fraction and non-freezing part, and the thermal baffle is isolated frozen fraction and non-freezing part, and the thermal baffle is provided with feed tube circular hole and liquid back pipe circular hole.
Description
Technical field
The utility model is related to stratum to excavate technical field of construction, the more particularly to buried tunneling car of rich water sand-pebble layer
Stand construction underground moisture section freezing system.
Background technology
With continuing to develop for current social, the increase of population, land resource becomes more rare, more in order to obtain
Space, the exploitation underground space has become alleviates congested in traffic inexorable trend.And at this stage, various city underground engineerings are
Build, such as city underground, river bed, seabed and mountain tunnel, deep foundation building and basement etc..But the foundation pit walls all come therewith
Supporting, water proof the problems such as also become increasingly to protrude, especially in severe geology, hydrologic condition and ring around harshness
Under border.In recent years, with the Persisting exploitation of urban underground space, it has to tackle the problem that deep excavation is brought, deep layer is stopped
Water is exactly the problem for wherein protruding, and these problems also include：
(1) excavation area is big
Excavation area is big, length and width have up to hundreds of meters, project scale increasingly increases, and brings larger to support system
Difficulty；The excavation of foundation pit of large area destroys the natural poised state of the original soil body, and after excavation of foundation pit, major part deformation meeting exists
Initial 24 hours occur.If supportted again after digging, in the meantime, the soil body has produced moderate finite deformation.As for stage excavation, because
Deeper foundation ditch, once excavates on earth, and slope soil can also produce moderate finite deformation.
(2) stratum osmotic coefficient is big
Water table aquifer difference in distribution in the range of metro station construction is larger, aqueous abundant, and station bottom waterproofly
Layer buried depth is deeper, and stratum osmotic coefficient is big.If using the method for the precipitation that draws water, can be produced necessarily to Adjacent Buildings ground
Influence, and a large amount of underground water are extracted daily, pumping equipment sets difficult, and can have an impact to environment.
(3) Adjacent Buildings are intensive
Deep excavation can produce larger displacement and sedimentation, and shadow is caused to Adjacent Buildings, urban operating mechanism and underground utilities
Ring, therefore requirement of the deep basal pit to stabilization and displacement is more strict；Implement in busy city proper location, similar Large Underground is excavated
Construction work causes the adverse effect to neighboring buildings, produces house badly damaged, and the use of existed building also suffers from harm,
Hinder being normally carried out for project under construction.
It is desirable to there is a kind of rich water sand-pebble layer buried Station construction underground moisture section freezing system can be every
Freeze to reach sealing purpose with water-bearing layer below the floor of station.
Utility model content
The purpose of this utility model is to provide a kind of rich water sand-pebble layer buried Station construction underground moisture section
Freezing system overcomes the above-mentioned problems in the prior art.
To achieve the above object, the utility model provides a kind of rich water sand-pebble layer buried Station construction underground water
Step freezing system, the buried Station construction underground moisture section freezing system of rich water sand-pebble layer includes：Freeze portion
Point, non-freezing part and thermal baffle；
Frozen fraction, the frozen fraction is made up of hollow seamless steel pipe, and the frozen fraction plugs base plate AT STATION
Lower section；
Non-freezing part, the non-freezing part is arranged on frozen fraction top, the non-freezing part include into
The heat-insulating material of liquid pipe, liquid back pipe and filling, the feed tube and liquid back pipe are plugged in the seamless steel pipe respectively；
Thermal baffle, the thermal baffle is arranged between the frozen fraction and non-freezing part, the thermal baffle
Frozen fraction and non-freezing part are isolated, the thermal baffle is provided with feed tube circular hole and liquid back pipe circular hole.
Preferably, the depth of the non-freezing part is the depth that part is excavated at station.
Preferably, the depth of the frozen fraction is the depth that station base plate does not excavate part.
Preferably, isolated by adiabatic packing material between the feed tube and liquid back pipe.
Preferably, the material of the seamless steel pipe is low-carbon (LC) seamless steel pipe.
Preferably, the seamless steel pipe is Φ 127mm × 5mm, and Frozen wall thickness is 3m.
Preferably, the spacing between the step freezing pipe is 2.5m.
The utility model provides a kind of buried Station construction underground moisture section freezing system of rich water sand-pebble layer,
Can be reached by the buried Station construction underground moisture section freezing system of rich water sand-pebble layer of the present utility model following
Beneficial effect：
1. deep phreatic water preservation and migration rule are not destroyed；
2. not polluted underground water water quality, existing underground structure is not destroyed；
3. freezing hole construction downwards since minus two layers of top board reaches designed elevation, it is necessary to pass through minus three layers and excavate space,
It is therefore possible to use step freezing so that base plate needs frozen region to form complete flat board, and the minus three layers soil excavated in space
Body does not freeze or freezes less, not only saves and excavates cost, and expense is freezed in reduction.
Brief description of the drawings
Fig. 1 is the vertical section schematic diagram of the buried Station construction underground moisture section freezing system of rich water sand-pebble layer.
Fig. 2 is the schematic cross-sectional view of the buried Station construction underground moisture section freezing system of rich water sand-pebble layer.
Specific embodiment
For the purpose, technical scheme and advantage for implementing the utility model are clearer, below in conjunction with the utility model
Accompanying drawing in embodiment, is further described in more detail to the technical scheme in the utility model embodiment.In the accompanying drawings, ad initio
Same or similar element or element with same or like function are represented to same or similar label eventually.Described reality
It is a part of embodiment of the utility model to apply example, rather than whole embodiments.Below with reference to the embodiment of Description of Drawings
It is exemplary, it is intended to for explaining the utility model, and it is not intended that to limitation of the present utility model.It is new based on this practicality
Embodiment in type, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of the utility model protection.Embodiment of the present utility model is described in detail below in conjunction with the accompanying drawings.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward " are based on accompanying drawing institute
The orientation or position relationship for showing, are for only for ease of description the utility model and simplify description, signified rather than indicating or implying
Device or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this practicality
The limitation of novel protected scope.
In the broad embodiment of the utility model one, the buried Station construction underground moisture section of rich water sand-pebble layer is frozen
Clone is united, and the buried Station construction underground moisture section freezing system of rich water sand-pebble layer includes：Frozen fraction, non-jelly
Knot point and thermal baffle；Frozen fraction, the frozen fraction is made up of hollow seamless steel pipe, and the frozen fraction is plugged in
Station base plate lower section；Non-freezing part, the non-freezing part is arranged on the frozen fraction top, the non-freezing part bag
The heat-insulating material of feed tube, liquid back pipe and filling is included, the feed tube and liquid back pipe are plugged in the seamless steel pipe respectively；Absolutely
Hot dividing plate, the thermal baffle is arranged between the frozen fraction and non-freezing part, and the thermal baffle is by frozen fraction
Isolated with non-freezing part, the thermal baffle is provided with feed tube circular hole and liquid back pipe circular hole.
As shown in Figure 1-2, the buried Station construction underground moisture section freezing system of rich water sand-pebble layer includes：Freeze
Knot point 1, non-freezing part 2 and thermal baffle 3.
The frozen fraction 1 is made up of hollow seamless steel pipe 4, and the frozen fraction 1 plugs base plate lower section AT STATION.
The non-freezing part 2 is arranged on the top of the frozen fraction 1, the non-freezing part 2 include feed tube 5,
The heat-insulating material 7 of the filling of liquid back pipe 6 and thermal insulation, the feed tube 5 and liquid back pipe 6 are plugged in the seamless steel pipe 4 respectively,
Isolated by adiabatic packing material 7 between the feed tube 5 and liquid back pipe 6.
The thermal baffle 3 is arranged between the frozen fraction 1 and non-freezing part 2, and the thermal baffle 3 will freeze
Part 1 and non-freezing part 2 are isolated.
The thermal baffle 3 is provided with feed tube circular hole and liquid back pipe circular hole.
The depth of the non-freezing part is the depth that part is excavated at station.
The depth of the frozen fraction is the depth that station base plate does not excavate part.
Isolated by adiabatic packing material between the feed tube and liquid back pipe.
The material of the seamless steel pipe is low-carbon (LC) seamless steel pipe.
The seamless steel pipe is Φ 127mm × 5mm, and Frozen wall thickness is 3m.
Spacing between the step freezing pipe is 2.5m.
No. 19 line Bei Taipingzhuangs station geological conditions：
1st, stratum is followed successively by from top to bottom in the range of station：Silty clay 4. layer, Extra-fine sand 4. 3, cobble circle gravel 5., silty
Clay 6., 6. 2 layers of silt, detail sand 6. 3,7. 2 layers of Extra-fine sand, cobble 7. layer, cobble 9. layer, 9. 2 layers of Extra-fine sand.Vault is located at
3. 3 layers of Extra-fine sand, medium coarse sand 4. 4, base plate is located at cobble 9. layer, infiltration coefficient 150m/d.
2nd, perched water buried depth 2.5m~5.8m, diving (two) buried depth 11.2m~14.64m, at the vault of station, dive
Water (three) buried depth 26.6m~30.5m, positioned at station base plate top 7m~11m.
For No. 19 line stations, dive under water (two) buried depth 14.5m, and positioned at station vault, dive under water (three) buried depth 26.7m,
Positioned at station base plate top 11.4m.After drilling is taken by hydrophobic (three) stratum to diving of diving (two), at the buried depth of (three) of diving under water
In minus two layers of station below plate, it is possible to directly constructed to plate in minus two layers of station using commonsense method.
The key link of station construction is the excavation and structure construction on stratum below plate in No. 19 minus two floor in line station, we
Case is mainly designed to solve the problems, such as constructed in the stratum in No. 19 minus two floor in line station below plate, i.e., in (three) stratum containing diving
Excavation and station construction, specific work progress carried out on plate in minus two layers for completing, special instruction, practice of construction
In, if it find that the depth shallower of diving (three), cannot be constructed to during plate, being constructed in minus two layers of station using commonsense method
Extreme lower position, increase construction it is interim in plate, on interim middle plate carry out construction freezing method reinforcing to separate underground water, subsequently
Processing method it is essentially identical.
In order to process No. 19 lines (three) stratum containing diving, meet station and excavate and structure construction, using step freezing pipe, will
Freeze below negative Tipple Bottom plate, cut-off diving (three).
I.e. on plate in No. 19 minus two floor in line station, arrange freezing hole, using step freezing pipe, minus three layers without freezing,
Freeze the soil body below negative Tipple Bottom plate, and then separate diving (three), excavate minus three layers of station.
All of freezing hole is constructed in minus two layers on plate AT STATION, is excavating the border of scope, advance when skirt piles are constructed
Arrangement one encloses freezing hole, forms the freezing curtain of ring to resist the Water And Earth Pressures of surrounding.It is close in the inside arrangement for excavating scope
The freezing hole of cloth, forms water shutoff flat board (having some strength), under resistance using partial freezing's method in the bottom for excavating scope
The water pressure in portion.
No. 19 lines dive under water three-level line under minus two floor base plate, accordingly, it would be desirable to constructed on minus two layers of base plate freeze vertically
Knot pipe (calling middle plate freezing pipe in the following text), Frozen wall thickness takes 3m, bears backfill 1m thickness plain concrete cushion layers under Tipple Bottom plate, and middle plate freezes
Length of tube is 12.3m.Length of tube is freezed for 22.3m in periphery, for the duration and cost of saving engineering can be by periphery layout of freezing pipes
In skirt piles, lagging edge pile driving construction is carried out simultaneously, saves drilling time and expense.
Solidification point：Positive -26 DEG C to -30 DEG C of freezing period brine temp, safeguards -25 DEG C of freezing period brine temp
To -28 DEG C.- 10 DEG C of frost wall mean temperature.Middle plate freezes tube pitch control in 2.5m, and array pitch is controlled in 2m.
Freeze pipe size：Middle plate freezes pipe size for 127mm × 5mm, partial freezing.
Because construction area area is larger, the construction period is long, for convenience organizing construction, by the distributing position of transverse passage-way,
Whole construction area is divided into five sections (L5, L6 spacing are larger, are divided to two sections of constructions) along station length direction, transverse passage-way both sides use
It is complete to freeze (i.e. single freezing pipe does not use partial freezing's mode) deeply, the freezing curtain of closing is formed in segmentation portion, to facilitate group
Knit excavation construction.Sequential organization construction between different sections, it is ensured that excavate the continuity with structure construction.Whole boundary of works area is divided into
Five construction segmentations, it is contemplated that construction infection each other, segmentation one and segmentation five can start simultaneously at construction, then carry out
Segmentation two and the construction of segmentation four, finally carry out the construction of segmentation three.Respectively freeze segmentation internal, the freezing speed of middle freezing hole
Hurry up, excavation construction can be excavated from centre to surrounding, in advance excavation construction, save the construction period.
It is last it is to be noted that：Above example is only used to illustrate the technical solution of the utility model, rather than it is limited
System.Although being described in detail to the utility model with reference to the foregoing embodiments, one of ordinary skill in the art should manage
Solution：It can still be modified to the technical scheme described in foregoing embodiments, or which part technical characteristic is entered
Row equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from each embodiment of the utility model
The spirit and scope of technical scheme.
Claims (7)
1. rich water sand-pebble layer buried Station construction underground moisture section freezing system, it is characterised in that including：Freeze portion
Point, non-freezing part and thermal baffle；
Frozen fraction, the frozen fraction is made up of hollow seamless steel pipe, and the frozen fraction plugs base plate lower section AT STATION；
Non-freezing part, the non-freezing part is arranged on frozen fraction top, the non-freezing part include feed tube,
Liquid back pipe and the heat-insulating material of filling, the feed tube and liquid back pipe are plugged in the seamless steel pipe respectively；
Thermal baffle, the thermal baffle is arranged between the frozen fraction and non-freezing part, and the thermal baffle will freeze
Knot point and non-freezing part are isolated, and the thermal baffle is provided with feed tube circular hole and liquid back pipe circular hole.
2. rich water sand-pebble layer as claimed in claim 1 buried Station construction underground moisture section freezing system, it is special
Levy and be, the depth of the non-freezing part excavates the depth of part for station.
3. rich water sand-pebble layer as claimed in claim 1 buried Station construction underground moisture section freezing system, it is special
Levy and be, the depth of the frozen fraction does not excavate the depth of part for station base plate.
4. rich water sand-pebble layer as claimed in claim 1 buried Station construction underground moisture section freezing system, it is special
Levy and be, isolated by adiabatic packing material between the feed tube and liquid back pipe.
5. rich water sand-pebble layer as claimed in claim 1 buried Station construction underground moisture section freezing system, it is special
Levy and be, the material of the seamless steel pipe is low-carbon (LC) seamless steel pipe.
6. rich water sand-pebble layer as claimed in claim 5 buried Station construction underground moisture section freezing system, it is special
Levy and be, the seamless steel pipe is Φ 127mm × 5mm, and Frozen wall thickness is 3m.
7. rich water sand-pebble layer as claimed in claim 5 buried Station construction underground moisture section freezing system, it is special
Levy and be, the spacing between the step freezing pipe is 2.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621246851.5U CN206290269U (en) | 2016-11-18 | 2016-11-18 | The buried Station construction underground moisture section freezing system of rich water sand-pebble layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621246851.5U CN206290269U (en) | 2016-11-18 | 2016-11-18 | The buried Station construction underground moisture section freezing system of rich water sand-pebble layer |
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| Publication Number | Publication Date |
|---|---|
| CN206290269U true CN206290269U (en) | 2017-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621246851.5U Active CN206290269U (en) | 2016-11-18 | 2016-11-18 | The buried Station construction underground moisture section freezing system of rich water sand-pebble layer |
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| Country | Link |
|---|---|
| CN (1) | CN206290269U (en) |
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2016
- 2016-11-18 CN CN201621246851.5U patent/CN206290269U/en active Active
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