CN204780857U - Pipe is freezed in slip casting - Google Patents

Pipe is freezed in slip casting Download PDF

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Publication number
CN204780857U
CN204780857U CN201520505408.4U CN201520505408U CN204780857U CN 204780857 U CN204780857 U CN 204780857U CN 201520505408 U CN201520505408 U CN 201520505408U CN 204780857 U CN204780857 U CN 204780857U
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China
Prior art keywords
pipe
slip casting
steel pipe
length
freezing
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CN201520505408.4U
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Inventor
杨平
张婷
何冬
陈斌
何文龙
丁顺良
王升福
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HUADONG CONSTRUCTION CO., LTD. OF CHINA RAILWAY NO.3 ENGINEERING GROUP Co.,Ltd.
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Nanjing Forestry University
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Abstract

The utility model relates to a pipe is freezed in slip casting, this pipe is freezed in slip casting comprises with feed pipe II slip casting pipe I, and wherein slip casting pipe I has 3-6 sections constitutions, and the 1st pipe joint end is equipped with drill bit III, and a check valve IV is respectively arranged to the pipe shaft both sides, feed pipe II is made by two steel pipe weld crosswises. Slip casting pipe for 89 8mm of phi, 20# low carbon seamless steel pipe, the 1st section length is 1m, follow -up each section length is 1.5m, feed pipe II be 45 3mm of phi, 20# low carbon seamless steel pipe, one of them 2-8m of steel pipe length, another steel pipe length 0.5m, the welding on a side of 2-8m steel pipe front end. This pipe is freezed in slip casting both can be used as slip casting improvement in engineering earlier stage soil layer, can regard as follow -up stabilization by freezing to use again, and on original basis of freezing to be under construction, need not the construction of drilling in addition, had avoided unnecessary soil erosion and water loss, operated more portably, and the reinforcement benefit is showing.

Description

A kind of slip casting freezing pipe
Technical field
The utility model relates to a kind of slip casting freezing pipe, is applied to metro tunnel connecting channel stabilization works, belongs to civil works technical field.
Background technology
There is soft layer on a large scale in the nearly river such as Ningbo, Shanghai and Nanjing, Haiti district, soil strength is lower, and water content is higher.In underground engineering construction process, need to take into account subside, many-sided problem such as water burst, wherein the reinforcement of service channel is crucial.Engineering with artificial freezing method and cement-soil reinforcing method are all in daily use in engineering, cut both ways.
Freezing process utilizes manual pipe jacking Refrigeration Technique, the water in stratum is build-up ice, natural ground is become frozen soil, increase its strength and stability, and contacting of isolated underground water and underground construction, so that under the protection of frost wall, carries out underground construction driving and masonry construction.It has can form frozen soil wall under extremely complicated engineering geology and hydrogeological conditions, be not subject to the restriction of supporting scope and the supporting degree of depth, have the advantages such as strict water proofing property and nonstaining property.
But after engineering with artificial freezing method construction, surrounding formation is made to produce frost heave, thaw collapse phenomenon, concerning surrounding environment, the engineering properties of soil and adjacent building are adversely affected, as caused foundation instability, make adjacent structure produce inclinations, crack, serious time can cause the accidents such as building collapse, or make the adverse consequences such as underground utilities generation destruction.
After service channel frozen construction terminates, the mode of the general employing frost free period tracking grouting filling soil body controls stratum settlement, the selected of slip casting position relies on engineering experience mostly, grouting amount is only according to Ground Subsidence Monitoring every day, the controllability of engineering is poor, is difficult to control completely thaw collapse after the work of soft soil layer; Due to thaw collapse, to affect the cycle longer, and during slip casting in early stage not in place often causes metro operation, upper and lower line produces differential settlement, causes serious potential safety hazard.
The mode forming cement-soil induration at present in soil uses slip casting method, deep-mixed pile and high-pressure rotary spraying method.This engineering method adopts slip casting method wherein.
Slip casting method cementitious materials is mixed with slurries and injects the loose construction method making it solidify containing sand or water bearing ground, the rock stratum containing crack, solution cavity, zone of fracture.After slurries setting and harden, play cementing, ponding, make stratum firmly and cut off water source, to ensure smooth construction.
In actual underground construction, for improving the validity of ground stabilization, comprehensive engineering with artificial freezing method and cement-soil reinforcing method carry out simultaneously sometimes.As in metro tunnel excavation process, shield end start with receive, the construction of service channel often reinforces inefficacy because of cement-soil and goes wrong, and at this moment can freezing process be taked again once to supplement reinforcing; Run into that risk is comparatively large, strata condition is complicated or around building requirement sedimentation very little time, first carry out basement process with cement-soil reinforcing method, on established cement-soil basis, carry out engineering with artificial freezing method construction more afterwards.
Utility model content
The purpose of this utility model is to provide a kind of slip casting freezing pipe.
The purpose of this utility model is achieved through the following technical solutions:
A kind of slip casting freezing pipe, is characterized in that this slip casting freezing pipe is made up of Grouting Pipe I and feed pipe II, and wherein Grouting Pipe I is made up of 3 ~ 6 joints, and Section 1 pipe end is equipped with drill bit III, and an one way valve IV is respectively arranged in pipe shaft both sides; Feed pipe II is made up of two steel pipe cross welds.
Described a kind of slip casting freezing pipe, it is characterized in that described Grouting Pipe I is Φ 89 × 8mm, 20# low-carbon (LC) seamless steel pipe, Section 1 length is 1m, and follow-up each joint length is 1.5m.
Described a kind of slip casting freezing pipe, it is characterized in that described feed pipe II is Φ 45 × 3mm, 20# low-carbon (LC) seamless steel pipe, one of them steel pipe length 2 ~ 8m, another steel pipe length 0.5m, be welded on a side of 2 ~ 8m steel pipe front end.
Use described slip casting freezing pipe to reinforce the construction method freezing service channel check frost heave thaw collapse, it is characterized in that construction sequence is as follows:
A, preparation of construction, obstruction in cleaning tunnel, builds construction operation platform; Connect supply line, construct power supply to meet freezing system and excavation in drilling construction, tunnel; Lay pipeline to Freezing Method for Cross-passage Construction work plane, drill for position, hole and freeze running and supply water and blowdown; Check cement quality, rig service behaviour and the intact degree of measuring equipment;
B, locating holes, take secondary hole opening technology, according to position, position, hole, deflection, the degree of depth; Driller insertion, selects MD-60 rig, and control torque 2KN/m, thrust 17KN carry out position, hole and be drilled with;
After c, perforate, Grouting Pipe is pierced to position, pre-pouring grout hole and carries out slip casting, Grouting Pipe selects Φ 89 × 8mm, 20# low-carbon (LC) seamless steel pipe, Section 1 Grouting Pipe length is 1m, and follow-up Grouting Pipe is a joint with 1.5m, and first joint Grouting Pipe pipe end and pipe shaft install one way valve slip casting, one-way valve opens pressure between 0.3 ~ 0.5MPa, according to projected depth slip casting section by section;
D, grouting parameter, for soft soil layer, cement grout proportioning selects 10%, for the service channel (buried depth≤20m) of normal buried depth, grouting pressure 0.4 ~ 0.5MPa is controlled, if time service channel buried depth comparatively dark (20m < buried depth≤40m), strengthen grouting pressure to 0.8 ~ 1.0Mpa in slip casting process, guarantee slurries diffusion evenly, control slip casting radius at 1.8m ~ 2.0m; Grouting amount controls according to undisturbed soil space when boring procedure soil erosion amount, and it is more suitable that slurries finally fill undisturbed soil 50% ~ 60% space;
E, rotation Grouting Pipe, guarantee that cement paste fully mixes with soil, suppress after slip casting to Grouting Pipe, get rid of unnecessary slurries, in Grouting Pipe, then settle feed pipe as follow-up freezing pipe use, and with sponge or foamed plastic shutoff aperture, in case slurries leak outside;
F, mobile drill are to position, next hole, and position, hole is drilled with and adopts interval to drill method, and repeats step 2-5, until all injected hole slip casting is complete;
G, drilling sequences, be preferentially drilled with service channel base apertures position, then to service channel top-portion apertures position, is finally service channel two side holes position, and service channel two side holes position is drilled with can carry out simultaneously;
H, do not do grouting hole and directly arrange freezing pipe, sequence of construction is: bottom locating holes and orifice tube installation → port seal installation → boring → measurement → blind hole → and bulge test.
Refrigeration system is freezed in i, installation, arranges thermometer hole, relief hole, connecting line, installs heat-preserving equipment, test instrumentation, dissolves calcium chloride and fill fluorine to unit to refuel;
J, maintenance 14 days after last hole slip casting completes, start frozen construction, keep minimum brine temp-28 ~-30 DEG C, until design frozen region has reinforced.
Beneficial effect
This slip casting freezing pipe, has following beneficial effect:
1, all current existing engineering machinery is used, workable;
2, material requested frozen construction scene all has; Without the need to other customization;
3, both can be used as slip casting improvement in early stage soil layer, can be used as again later stage consolidation by freezing, convenience and high-efficiency.
Accompanying drawing explanation
Fig. 1 is slip casting freezing pipe schematic diagram.
Reference numeral: I-Grouting Pipe, II-feed pipe, III-drill bit, IV-one way valve
Detailed description of the invention
Embodiment 1: a kind of slip casting freezing pipe
Ningbo Metro Connection Passage, it is plain fill from top to down that its place geology rises on ground, and silty sand ground, silty clay layer, the stratum of shield crossing is mainly silty clay layer.Service channel buried depth 27.6m, stabilization works adopts cement-soil reinforcing+horizontal freezing joint reinforcement.According to designing requirement, service channel reinforcement depth is 8.5m.
1, a slip casting freezing pipe, length is 8.5m, it is characterized in that this slip casting freezing pipe is made up of Grouting Pipe I and feed pipe II, and wherein Grouting Pipe I is made up of 6 joints, and Section 1 pipe end is equipped with drill bit III, and an one way valve IV is respectively arranged in pipe shaft both sides; Feed pipe II is made up of two steel pipe cross welds.
2, described a kind of slip casting freezing pipe, it is characterized in that described Grouting Pipe I is Φ 89 × 8mm, 20# low-carbon (LC) seamless steel pipe, Section 1 length is 1m, and follow-up each joint length is 1.5m.
3, described a kind of slip casting freezing pipe, it is characterized in that described feed pipe II is Φ 45 × 3mm, 20# low-carbon (LC) seamless steel pipe, one of them steel pipe length 8.0m, another steel pipe length 0.5m, be welded on a side of 8m steel pipe front end.
Embodiment 2: a kind of slip casting freezing pipe
Suzhou subway No. 3 line service channels, it is plain fill from top to down that its place geology rises on ground, silty clay layer, flour sand alternation of bed, Extra-fine sand.The stratum of shield crossing is mainly fine sand layer.Service channel buried depth 15.2m, stabilization works adopts cement-soil reinforcing+horizontal freezing joint reinforcement.According to designing requirement, service channel reinforcement depth is 4m.
A kind of slip casting freezing pipe, length is respectively 4m, it is characterized in that this slip casting freezing pipe is made up of Grouting Pipe I and feed pipe II, and wherein Grouting Pipe I is made up of 3 joints, and Section 1 pipe end is equipped with drill bit III, and an one way valve IV is respectively arranged in pipe shaft both sides; Feed pipe II is made up of two steel pipe cross welds.
2, described a kind of slip casting freezing pipe, it is characterized in that described Grouting Pipe I is Φ 89 × 8mm, 20# low-carbon (LC) seamless steel pipe, Section 1 length is 1m, and follow-up each length is 1.5m.
3, described a kind of slip casting freezing pipe, it is characterized in that described feed pipe II is Φ 45 × 3mm, 20# low-carbon (LC) seamless steel pipe, one of them steel pipe length 3.5m, another steel pipe length 0.5m, be welded on a side of 3.5m steel pipe front end.
Embodiment 3: a kind of slip casting freezing pipe
Ningbo subway service channel, it is plain fill from top to down that its place geology rises on ground, silty clay layer, fine sand layer.The stratum of shield crossing is mainly fine sand layer.Service channel buried depth 21.8m, stabilization works adopts cement-soil reinforcing+horizontal freezing joint reinforcement.According to designing requirement, service channel reinforcement depth is 7m.
A kind of slip casting freezing pipe, length is respectively 7m, it is characterized in that this slip casting freezing pipe is made up of Grouting Pipe I and feed pipe II, and wherein Grouting Pipe I is made up of 5 joints, and Section 1 pipe end is equipped with drill bit III, and an one way valve IV is respectively arranged in pipe shaft both sides; Feed pipe II is made up of two steel pipe cross welds.
2, described a kind of slip casting freezing pipe, it is characterized in that described Grouting Pipe I is Φ 89 × 8mm, 20# low-carbon (LC) seamless steel pipe, Section 1 length is 1m, and follow-up each joint length is 1.5m.
3, described a kind of slip casting freezing pipe, it is characterized in that described feed pipe II is Φ 45 × 3mm, 20# low-carbon (LC) seamless steel pipe, one of them steel pipe length 6.5m, another steel pipe length 0.5m, be welded on a side of 6.5m steel pipe front end.

Claims (3)

1. a slip casting freezing pipe, it is characterized in that this slip casting freezing pipe is made up of Grouting Pipe (I) and feed pipe (II), wherein Grouting Pipe (I) is made up of 3 ~ 6 joints, Section 1 pipe end is equipped with drill bit (III), and an one way valve (IV) is respectively arranged in pipe shaft both sides; Feed pipe (II) is made up of two steel pipe cross welds.
2. a kind of slip casting freezing pipe according to claim 1, it is characterized in that described Grouting Pipe (I) is for Φ 89 × 8mm, 20# low-carbon (LC) seamless steel pipe, Section 1 length is 1m, and follow-up each joint length is 1.5m.
3. a kind of slip casting freezing pipe according to claim 1, it is characterized in that described feed pipe (II) is for Φ 45 × 3mm, 20# low-carbon (LC) seamless steel pipe, one of them steel pipe length 2 ~ 8m, another steel pipe length 0.5m, is welded on a side of 2 ~ 8m steel pipe front end.
CN201520505408.4U 2015-07-13 2015-07-13 Pipe is freezed in slip casting Active CN204780857U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104963334A (en) * 2015-07-13 2015-10-07 南京林业大学 Construction method for utilizing grouting freezing pipe to reinforce and freeze contact passage to restrain frost heaving and thaw collapsing
CN106948336A (en) * 2017-05-10 2017-07-14 刘鹏飞 A kind of grouting strengthening method based on thermodynamic principles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104963334A (en) * 2015-07-13 2015-10-07 南京林业大学 Construction method for utilizing grouting freezing pipe to reinforce and freeze contact passage to restrain frost heaving and thaw collapsing
CN106948336A (en) * 2017-05-10 2017-07-14 刘鹏飞 A kind of grouting strengthening method based on thermodynamic principles

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
EE01 Entry into force of recordation of patent licensing contract

Assignee: Jiangsu Construction Engineering Consulting Co., Ltd.

Assignor: Nanjing Forestry University

Contract record no.: 2018320000245

Denomination of utility model: Pipe is freezed in slip casting

Granted publication date: 20151118

License type: Common License

Record date: 20181026

Assignee: Jiangsu Rong Rui Construction Technology Co., Ltd.

Assignor: Nanjing Forestry University

Contract record no.: 2018320000247

Denomination of utility model: Pipe is freezed in slip casting

Granted publication date: 20151118

License type: Common License

Record date: 20181026

Assignee: CUMT Geotechnical Engineering & New Technology Development Co.,Ltd.

Assignor: Nanjing Forestry University

Contract record no.: 2018320000246

Denomination of utility model: Pipe is freezed in slip casting

Granted publication date: 20151118

License type: Common License

Record date: 20181026

Assignee: Jiangsu Construction Engineering Consulting Co., Ltd.

Assignor: Nanjing Forestry University

Contract record no.: 2018320000245

Denomination of utility model: Pipe is freezed in slip casting

Granted publication date: 20151118

License type: Common License

Record date: 20181026

Assignee: Jiangsu Rong Rui Construction Technology Co., Ltd.

Assignor: Nanjing Forestry University

Contract record no.: 2018320000247

Denomination of utility model: Pipe is freezed in slip casting

Granted publication date: 20151118

License type: Common License

Record date: 20181026

Assignee: CUMT Geotechnical Engineering & New Technology Development Co.,Ltd.

Assignor: Nanjing Forestry University

Contract record no.: 2018320000246

Denomination of utility model: Pipe is freezed in slip casting

Granted publication date: 20151118

License type: Common License

Record date: 20181026

EE01 Entry into force of recordation of patent licensing contract
TR01 Transfer of patent right

Effective date of registration: 20201215

Address after: Building 11, No.8 Shuige Road, Jiangning Economic and Technological Development Zone, Nanjing, Jiangsu Province

Patentee after: HUADONG CONSTRUCTION CO., LTD. OF CHINA RAILWAY NO.3 ENGINEERING GROUP Co.,Ltd.

Address before: Longpan road Xuanwu District of Nanjing city of Jiangsu Province, No. 159 210037

Patentee before: NANJING FORESTRY University

TR01 Transfer of patent right