CN206111219U - Rich water sand cobble stratum buries complete dark curtain that secretly digs station deeply and freezes stagnant water system - Google Patents

Rich water sand cobble stratum buries complete dark curtain that secretly digs station deeply and freezes stagnant water system Download PDF

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Publication number
CN206111219U
CN206111219U CN201621095457.6U CN201621095457U CN206111219U CN 206111219 U CN206111219 U CN 206111219U CN 201621095457 U CN201621095457 U CN 201621095457U CN 206111219 U CN206111219 U CN 206111219U
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CN
China
Prior art keywords
curtain
freezing
freezes
station
water
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CN201621095457.6U
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Chinese (zh)
Inventor
张晋勋
江华
江玉生
单仁亮
杨昊
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北京城建集团有限责任公司
中国矿业大学(北京)
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Priority to CN201621095457.6U priority Critical patent/CN206111219U/en
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Publication of CN206111219U publication Critical patent/CN206111219U/en

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Abstract

The utility model discloses a rich water sand cobble stratum buries complete dark curtain that secretly digs station deeply and freezes stagnant water system, rich water sand cobble stratum buries complete dark curtain that secretly digs station deeply and freezes stagnant water system includes: freeze curtain and mud stone layer, the mud stone level in the excavation scope the bottom, it is in to freeze the curtain set up around the excavation scope, the bottom of freezing the curtain sets up the inside on mud stone layer.

Description

The complete deep curtain of the buried Station of rich water sand-pebble layer freezes water-stopping system

Technical field

The utility model is related to stratum and excavates technical field of construction, the more particularly to buried tunneling car of rich water sand-pebble layer The complete deep curtain stood freezes water-stopping system.

Background technology

With the development of China's economic, the quickening of urbanization process, urban population is more and more, and urban traffic pressure is dashed forward It is aobvious, it is to tackle the increasing city of this problem to start to build Urban Underground track traffic.But with urban underground space more closely The Persisting exploitation in year, has following deeper subsurface Mining Problems:

(1) ground construction environment is complicated

The ground in station construction region is main roads, and close to overpass, earth's surface pipeline is more, the limit to stratum settlement System has high demands, so should take specific aim measure in construction, reduces impact of the work progress to surrounding environment, it is ensured that earth's surface pipeline And the safety of building.

(2) water-bearing layer difficult treatment

According to hydrogeologic condition, the water table aquifer difference in distribution in the range of station construction is larger, aqueous abundant, and station bottom The impervious stratum buried depth in portion is deeper, and geological conditions is failed to understand.So in construction, to the treatment measures containing diving stratum, to applying The safety of work is particularly important.

(3) ground does not possess execution conditions

Due to the restriction and the presence of overpass of traffic above-ground, ground does not possess execution conditions, when selecting construction, should Consider the restriction of the execution conditions on ground.

(4) work progress environment limits big

Because ground does not possess execution conditions, all of construction needs to provide construction environment after pilot drive, so Work progress is limited greatly by environment, during the tissue of the selection of construction method and work progress, needs to consider construction environment pair The restriction of construction method;

It is desirable to the complete deep curtain for having a kind of buried Station of rich water sand-pebble layer freeze water-stopping system can be with shape Hydraulic connection within and outside the region is excavated into freezes body isolation, sealing purpose is reached.

Utility model content

The purpose of this utility model is that the complete deep curtain for providing a kind of buried Station of rich water sand-pebble layer freezes Water-stopping system is overcoming the above-mentioned problems in the prior art.

For achieving the above object, the utility model provides a kind of complete deep curtain of the buried Station of rich water sand-pebble layer Freezing water-stopping system includes:Freezing curtain and shale layer, the shale layer is located at the bottom for excavating scope, and the freezing curtain exists Arrange around the excavation scope, the bottom of the freezing curtain is arranged on the inside of the shale layer.

Preferably, the freezing curtain includes the frost wall formed by freezing pipe.

Preferably, the freezing hole of the freezing curtain is arranged in the outside of the excavation scope, the construction of the freezing hole Beyond station structure, pilot tunnel outwards expands scope and the top of pilot tunnel is constructed according to semicircular arch, high to provide drilling construction Degree.

Preferably, the freezing pipe is along the outer single arrangement of skirt piles.

Preferably, the Frozen wall thickness is 2.5m, is smaller than between the freezing pipe or equal to 2.5m, selects freezing pipe Spacing be 1.5m, freeze tube center distance skirt piles distance between center line and take 1.5m.

The utility model provides a kind of complete deep curtain of the buried Station of rich water sand-pebble layer and freezes water-stopping system, Freezing water-stopping system by the complete deep curtain of the buried Station of rich water sand-pebble layer of the present utility model can effectively prevent Region water body flow is only excavated, the freezing curtain and shale layer in the utility model is collectively forming the construction area of closing, is taking out After falling the diving in closure construction region, the excavation and structure construction of the station soil body can be carried out in the range of whole station.

Description of the drawings

Fig. 1 is the generalized section that full depth curtain freezes freezing pipe in water-stopping system.

Fig. 2 is the freezing curtain schematic cross-sectional view that full depth curtain freezes water-stopping system formation.

Fig. 3 is pilot tunnel structure enlarged plan view.

Specific embodiment

Purpose, technical scheme and advantage to implement the utility model is 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 is represented to same or similar label eventually or the element with same or like function.Described reality It is a part of embodiment of the utility model to apply example, rather than the embodiment of whole.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 restriction of the present utility model.It is new based on this practicality Embodiment in type, the every other enforcement 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 ", " horizontal ", "front", "rear", The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward " is based on accompanying drawing institute The orientation for showing or position relationship, are for only for ease of description the utility model and simplify description, rather than indicate or imply indication Device or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this practicality The restriction of novel protected scope.

In the broad embodiment of the utility model one, a kind of complete deep curtain of the buried Station of rich water sand-pebble layer freezes Knot water-stopping system includes:Freezing curtain and shale layer, the shale layer is located at the bottom for excavating scope, and the freezing curtain is in institute State and arranged around excavation scope, the bottom of the freezing curtain is arranged on the inside of the shale layer.

As shown in figure 1, the freezing curtain includes the frost wall formed by freezing pipe 1.

As shown in Figure 1-2, the freezing hole of the freezing curtain is arranged in the outside of the skirt piles 2 of the excavation scope, described The boundary of works area of freezing hole is beyond station structure.

As Figure 2-3, pilot tunnel is outwards extended to from pilot tunnel original structure scope 4 and expands pilot tunnel range of structures 5 and pilot tunnel Top is constructed according to semicircular arch, and to provide drilling construction height, AT STATION after the completion of structure construction, the pilot tunnel is outwards from pilot tunnel Original structure scope 4 is extended to the enlarged filling plain concrete for expanding pilot tunnel range of structures 5.

As shown in Figure 1-2, the freezing pipe 1 is along the outer single arrangement of skirt piles.

The Frozen wall thickness is 2.5m, is smaller than between the freezing pipe or equal to 2.5m, selects the spacing of freezing pipe For 1.5m, freeze tube center distance skirt piles distance between center line and take 1.5m.

The excavation and structure construction on stratum below plate in minus two floor in No. 19 line stations, this programme is mainly designed to solution 19 Excavation and station in the problem of middle construction in stratum in number minus two floor in line station below plate, i.e. (three) stratum containing diving is applied Work, specific work progress is carried out on plate in minus two layers for completing, special instruction, in practice of construction, if it find that latent The depth shallower of water (three), using commonsense method cannot construct to station it is minus two layers in plate when, in the extreme lower position that can be constructed, increase Plus the interim middle plate of construction, carrying out construction freezing method reinforcing to separate underground water on interim middle plate, follow-up processing method is basic It is identical.

There is the full depth curtain of water barrier to freeze sealing scheme:

Shown according to actual investigation data, visible complete shale layer (water barrier) at 90m under earth's surface, by freezing pipe creep into In mud stone, after frozen soil post hands over circle, freezing curtain collectively constitutes seal water structure with mud stone, and the excavation and structure construction at station are freezing Knot pars intramuralis is completed.

According to geology exploration data, buried depth is to stablize waterproof basement rock for below 90m under earth's surface, so structure AT STATION Surrounding lays one and encloses freezing hole, and the depth of freezing hole gos deep into waterproof basement rock, scope border is excavated AT STATION and forms the jelly closed Knot curtain, bottom relies on waterproof basement rock water shutoff, after taking out the diving in closed area, can carry out in the range of whole station The excavation and structure construction of the station soil body.

Excavate beyond region because the frost wall for being formed is located at, so freezing hole arrangement excavates AT STATION the outside of scope, So the boundary of works area of freezing hole, in order to meet the condition of freezing hole construction, needs pilot tunnel is outside beyond station structure Expand 1.5m, while the top of pilot tunnel is constructed according to semicircular arch, there is provided the space highly more than 5m, to facilitate drilling construction.

After the completion of station structure construction, pilot tunnel enlarged filling plain concrete meets the requirement of station structure design.

The determination of Frozen wall thickness:Frost wall mean temperature takes -10 DEG C, and Frozen wall thickness takes 2.5m, between layout of freezing pipes Within control 2.5m, it is considered to skirt piles position, the spacing for selecting freezing pipe is 1.5m, freezes tube center distance skirt piles distance between center line and takes 1.5m, freezing pipe model takes φ 127mm × 5mm, and 375 freezing pipes are needed altogether.

The arrangement of freezing pipe:Freezing pipe is constructed along skirt piles outside, to skirt piles construction spacing 1.5m, it is contemplated that freeze pipe construction Deflection influence and the requirement of frozen construction duration, the spacing of freezing pipe is defined as 1.5m, with skirt piles arranged for interval.Freeze what is developed When body diameter is less than 3m, Frozen wall thickness about 2.6m is formed, frozen soil to the scope for excavating scales is less than skirt piles Center, it is ensured that without frozen soil in the range of excavation, the construction of convenient excavation and structure.

Freezing pipe is entered stablizes basement rock 3m, and basal surfaces buried depth is considered by 90m, so the length of freezing pipe is calculated by 75m. Low-carbon (LC) seamless steel pipe of the freezing pipe from 127 × 5mm of φ.

Along the outer single arrangement of skirt piles, it is for about 560m that station extends out the total length after 1.5m to freezing pipe, according to spacing 1.5m cloth Spacing consideration is put, needs to arrange that freezing pipe 375 (does not consider the reinforcement complementary apertures at station corner turning, Specific construction figure altogether During design, according to the concrete arrangement of freezing pipe, station corner is strengthened to arrange), total length is 2.82 myriametres.

When taking this kind of project of shaft freezing, top diving (two) stratum closes on frozen curtain, it is not necessary to take specific aim Measure, excavation construction after directly starting to draw water.In addition, after using this kind of arrangement and method for construction, diving (two), diving (three) stratum Buried depth change to construction have little to no effect, it is not necessary to consider the change of engineering geological condition in freezing process to freezing to apply The impact of work, the construction cost and construction period for freezing is controllable.

It is last it is to be noted that:Above example is only illustrating 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 still can modify to the technical scheme described in foregoing embodiments, or which part technical characteristic is entered Row equivalent;And these modifications or replacement, do not make each embodiment of essence disengaging the utility model of appropriate technical solution The spirit and scope of technical scheme.

Claims (5)

1. the complete deep curtain of the buried Station of rich water sand-pebble layer freezes water-stopping system, it is characterised in that include:Freeze curtain Curtain and shale layer, the shale layer is located at the bottom for excavating scope, and the freezing curtain is arranged around the excavation scope, The bottom of the freezing curtain is arranged on the inside of the shale layer.
2. the complete deep curtain of the buried Station of rich water sand-pebble layer as claimed in claim 1 freezes water-stopping system, and it is special Levy and be, the freezing curtain includes the frost wall formed by freezing pipe.
3. the complete deep curtain of the buried Station of rich water sand-pebble layer as claimed in claim 1 freezes water-stopping system, and it is special Levy and be, the freezing hole of the freezing curtain is arranged in the outside of the excavation scope, the boundary of works area of the freezing hole is in Beyond station structure, pilot tunnel outwards expands and the top of pilot tunnel is constructed according to semicircular arch, to provide drilling construction height.
4. the complete deep curtain of the buried Station of rich water sand-pebble layer as claimed in claim 2 freezes water-stopping system, and it is special Levy and be, the freezing pipe is along the outer single arrangement of skirt piles.
5. the complete deep curtain of the buried Station of rich water sand-pebble layer as claimed in claim 2 freezes water-stopping system, and it is special Levy and be, the Frozen wall thickness is 2.5m, is smaller than between the freezing pipe or equal to 2.5m, and the spacing for selecting freezing pipe is 1.5m, freezes tube center distance skirt piles distance between center line and takes 1.5m.
CN201621095457.6U 2016-09-30 2016-09-30 Rich water sand cobble stratum buries complete dark curtain that secretly digs station deeply and freezes stagnant water system CN206111219U (en)

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CN201621095457.6U CN206111219U (en) 2016-09-30 2016-09-30 Rich water sand cobble stratum buries complete dark curtain that secretly digs station deeply and freezes stagnant water system

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CN201621095457.6U CN206111219U (en) 2016-09-30 2016-09-30 Rich water sand cobble stratum buries complete dark curtain that secretly digs station deeply and freezes stagnant water system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106351675A (en) * 2016-09-30 2017-01-25 北京城建集团有限责任公司 Total-depth curtain freezing and water stopping system of water and sand rich sandy gravel formation deeply-buried station excavated in concealed mode

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106351675A (en) * 2016-09-30 2017-01-25 北京城建集团有限责任公司 Total-depth curtain freezing and water stopping system of water and sand rich sandy gravel formation deeply-buried station excavated in concealed mode

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