CN103276720B - A kind of soft soil roadbed consolidation by freezing method - Google Patents
A kind of soft soil roadbed consolidation by freezing method Download PDFInfo
- Publication number
- CN103276720B CN103276720B CN201310213762.5A CN201310213762A CN103276720B CN 103276720 B CN103276720 B CN 103276720B CN 201310213762 A CN201310213762 A CN 201310213762A CN 103276720 B CN103276720 B CN 103276720B
- Authority
- CN
- China
- Prior art keywords
- frigo
- soft soil
- roadbed
- freezing
- soil roadbed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002689 soil Substances 0.000 title claims abstract description 79
- 238000007710 freezing Methods 0.000 title claims abstract description 58
- 230000008014 freezing Effects 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000007596 consolidation process Methods 0.000 title claims abstract description 17
- 238000010276 construction Methods 0.000 claims abstract description 17
- 239000003507 refrigerant Substances 0.000 claims abstract description 12
- 238000007711 solidification Methods 0.000 claims abstract description 4
- 230000008023 solidification Effects 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 5
- 230000002631 hypothermal effect Effects 0.000 claims description 5
- 239000011780 sodium chloride Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000012267 brine Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 description 5
- 238000002955 isolation Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a kind of soft soil roadbed consolidation by freezing method, it comprises the following steps: soft soil roadbed character and the surface conditions of construction are intended in (1) test; (2) according to the situation that step (1) is tested, determine road surface freezing method and select frigo; (3) determine quantity and the riding position of frigo, lay frigo; (4) external equipment is installed to frigo in step (3); (5) implement manual pipe jacking, make quick freezing in its 3 days, roadbed solidification point is-20 ° of C, and freezes the supporting capacity that roadbed has 100kN, and the vehicle within allowing 80 tons passes through.Beneficial effect is that low temperature refrigerant only need be sent into stratum by consolidation by freezing method of the present invention, namely can the soft soil roadbed frozen soils structure being frozen into some strength in the short time; Construction is simple, and the construction equipment of needs is few, occupied ground is little, speed of application is fast, also can according to the needs of different terrain, and adopt different freezer units to carry out consolidation by freezing to soft soil roadbed, consolidation effect is good, practical.
Description
Technical field
The present invention relates to a kind of soft soil roadbed reinforcement means, be specifically a kind ofly applicable to soft soil roadbed consolidation by freezing method.
Background technology
In natural calamity, war etc. in particular cases, need to realize the current of road fast on soft soil roadbed.Particularly in the laying of the interim sidewalk of road foundation or rescue requiring rapid construction, realize the current particularly important of road fast.
At present, adopt change banket, the method such as vacuum preloading, cement-soil campshed is reinforcing road bed.These subgrade strengthening methods have the advantages that earth volume is large, construction speed is slow, long in time limit, often can not realize the current of road in reality fast.Adopt the method also to need equipment is many, material is many, cannot complete admission and the construction of personnel and equipment at short notice simultaneously.
Summary of the invention
For above-mentioned prior art Problems existing, the invention provides a kind of soft soil roadbed consolidation by freezing method, soft soil roadbed quick freezing is reinforced, to meet the requirement of road.
To achieve these goals, the soft soil roadbed consolidation by freezing method of one of the present invention, comprises the following steps:
(1) soft soil roadbed character and the roadbed situation of construction is intended in test;
(2) the soft soil roadbed character recorded according to step 1 and roadbed situation, determine roadbed freezing method and select frigo,
Frigo is rectilinear frigo or film covering type frigo;
(3) determine quantity and the riding position of frigo, lay frigo;
(4) external equipment is installed to frigo in step 3, wherein refrigerant is that the frigo external equipment of liquid nitrogen is primarily of storage nitrogen groove, liquid nitrogen tank car and distributor composition, refrigerant is the frigo external equipment of hypothermic saline is Freezing Station, Freezing Station forms primarily of compressor, condenser, evaporimeter, brine pump and choke valve
(5) implement manual pipe jacking, make quick freezing in its 3 days, roadbed solidification point reaches-20 DEG C, and freezes roadbed and reach and have 100kN
Supporting capacity, the vehicle within allowing 80 tons passes through; For step (2) according to rectilinear frigo, the guarantor that need lay
Temperature isolation layer, it also should have the ability that carrying 80 tons of vehicles pass through.
Step of the present invention (2) in, there is weak substratum in soft soil roadbed or the Soft Soil Layer degree of depth is different, adopt difference freezing method, frigo adopts rectilinear frigo; When soft soil roadbed middle Soft Soil Layer distribution is relatively more even, adopt bulk freezing mode,
1. soft soil roadbed is horizontal roadbed, and frigo adopts rectilinear frigo or film covering type frigo, 2. soft soil roadbed be vertical or
The roadbed tilted, frigo adopts film covering type frigo; When soft soil roadbed on road distributed areas more scattered, adopt point
Sheet freezing method, 1. soft soil roadbed is horizontal roadbed, and frigo adopts rectilinear frigo or film covering type frigo, 2. weak soil
Roadbed is roadbed that is vertical or that tilt, and frigo adopts film covering type frigo.
Step of the present invention (3) in, there is weak substratum in soft soil roadbed or the Soft Soil Layer degree of depth is different, rectilinear frigo be placed in the Soft Soil Layer of weak substratum or certain depth; When soft soil roadbed middle Soft Soil Layer distribution is relatively more even, frigo is settled in design; When soft soil roadbed on road distributed areas more scattered, then frigo is according to the Position Design riding position coordinate point of distributed areas.
Step of the present invention (2) in, rectilinear frigo is the freezing pipe of taper by bottom and freezes loop and form, and the diameter of freezing pipe is 80cm.
The invention has the beneficial effects as follows: this consolidation by freezing method utilizes artificial cooling equipment and frigo, only low temperature refrigerant need be sent into stratum, in the short time, namely the soft soil roadbed frozen soils structure being frozen into some strength, the requirement of road can be met.
Compared with the method for traditional consolidated subsoil, consolidation by freezing method construction of the present invention is simple, the construction equipment needed is few, occupied ground is little, speed of application is fast, can also according to different terrain need adopt rectilinear frigo or film covering type frigo to carry out quick freezing reinforcing to soft soil roadbed, consolidation effect is good, practical.
Accompanying drawing explanation
Fig. 1 is the structural representation of rectilinear frigo;
Fig. 2 is that the difference of Fig. 1 freezes figure;
Fig. 3 is bulk freezing figure of the present invention;
Fig. 4 is that burst of the present invention freezes figure.
In figure: 1, road surface, 2, frozen region, 3, heat insulation layer, 4, rectilinear frigo.
Wherein, Fig. 3 is the bulk freezing figure of rectilinear frigo when freezing pipe is isometric of Fig. 1,
Fig. 4 is that the burst of rectilinear frigo when freezing pipe is isometric of Fig. 1 freezes figure; .
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
The frigo adopted in the present invention, can be rectilinear frigo 4 or film covering type frigo, its refrigerant can be liquid nitrogen or hypothermic saline, but is not limited to this type of refrigerant.
Rectilinear frigo 4 is that the freezing pipe of taper forms with the loop of freezing being connected freezing pipe by bottom.It adopts high strength seamless steel pipe or composite material to make, and uses static(al) plunging to be pressed in soil layer to meet in soft soil layer.As
Shown in Fig. 1, Fig. 2, this rectilinear frigo 4 freezes along the degree of depth at the direction of inserting and place, is specially adapted to need to freeze deep mixed roadbed; For preventing heat losses, one layer of heat preservation isolation layer 3 need be laid on its soil layer surface.In this rectilinear frigo, freezing pipe diameter is 80cm, and when laying, it is evenly arranged with the interval of 50cm.
Film covering type frigo forms by with the tabular or membranaceous slice structure of freezing loop and heat-barrier material, freezes loop and is made up of seamless steel pipe and is placed in below heat-barrier material, lay the plate of rigidity or the film of flexibility above heat-barrier material.Straight during use
Be connected on soil layer and lay, by the assembling between slice structure, can be deployed in rapidly in working face and it is frozen
Knot construction.As shown in Figure 3, Figure 4, this film covering type frigo evenly freezes along face, isolation layer place, is applicable to vertical or inclination roadbed; The every block length 5m of this film covering type frigo, end is interconnected in a flexible manner.
The soft soil roadbed consolidation by freezing method of one of the present invention, it comprises the following steps:
(1) soft soil roadbed character and the roadbed situation of construction is intended in test;
(2) the soft soil roadbed character recorded according to step 1 and roadbed situation, determine road surface freezing method and select frigo;
I) be divided into three kinds of situations according to the soft soil roadbed character of plan construction: as shown in Figure 2, the first situation is soft soil roadbed
In to there is weak substratum or the Soft Soil Layer degree of depth different, adopt difference freezing method, for this roadbed freeze can only pass through
The method of the rectilinear frigo 4 of vertical insertion realizes; As shown in Figure 3, the second situation is soft soil roadbed middle Soft Soil Layer distribution
Relatively more even, adopt the mode of bulk freezing, this freezes by vertically inserting rectilinear frigo or directly laying film covering type
The method of frigo realizes; As shown in Figure 4, the third situation be soft soil roadbed on road distributed areas more scattered, adopt
By the mode that burst freezes, the mode namely by reinforcing separately reaches the object of soft soil roadbed integral reinforcing, to save
Cost and time, this kind of frozen form is by the vertical method inserted rectilinear frigo or directly lay film covering type frigo
Realize,
II) be divided into two classes according to the soft soil roadbed situation intending construction: a class is horizontal roadbed, and frigo adopts rectilinear frigo or film covering type frigo; One class is roadbed that is vertical or that tilt, and from easy construction and safety, frigo adopts and covers
Membrane type frigo, selects frigo, three kinds of soft soil roadbed for plan construction situations need be combined with soft soil roadbed type and consider,
(3) determine quantity and the riding position of frigo, lay frigo;
The first situation be soft soil roadbed in there is weak substratum or the Soft Soil Layer degree of depth different, rectilinear frigo 4 is placed in the Soft Soil Layer of weak substratum or certain depth; The second situation is that soft soil roadbed middle Soft Soil Layer distribution is relatively more even, and frigo is settled in design; The third situation be soft soil roadbed on road distributed areas more scattered, then frigo is according to the Position Design riding position point of distributed areas; When adopting rectilinear frigo 4, be evenly arranged with 50cm interval; When adopting film covering type frigo, every 5m is put
Put one;
(4) install external equipment to frigo in step (3), this external equipment provides energy to frigo, and wherein refrigerant is
The frigo external equipment of liquid nitrogen is primarily of storage nitrogen groove, liquid nitrogen tank car and distributor composition, and refrigerant is the frigo of hypothermic saline
External equipment is Freezing Station, and Freezing Station forms primarily of compressor, condenser, evaporimeter, brine pump and choke valve;
(5) manual pipe jacking is implemented, make quick freezing in its 3 days, roadbed solidification point reaches-20 DEG C, and freeze the supporting capacity that roadbed has 100kN, vehicle within allowing 80 tons passes through, freezer unit provides energy with liquid nitrogen, hypothermic saline or other refrigerants to construction stratum, makes soft soil roadbed freezing, realizes soft soil roadbed reinforcing; For step (2) according to rectilinear frigo 4, the heat insulation layer 3 that need lay, it also has the ability that carrying 80 tons of vehicles pass through.
Claims (3)
1. a soft soil roadbed consolidation by freezing method, is characterized in that, described consolidation by freezing method comprises the following steps:
1. soft soil roadbed character and the roadbed situation of construction is intended in test;
2. the soft soil roadbed character 1. recorded according to step and roadbed situation, determine roadbed freezing method and select frigo, freezing method is divided into difference freezing method, bulk freezing mode and burst freezing method, and frigo is rectilinear frigo (4) or film covering type frigo; In soft soil roadbed, there is weak substratum or Soft Soil Layer degree of depth difference, adopt difference freezing method, frigo adopts rectilinear frigo (4); When soft soil roadbed middle Soft Soil Layer distribution is more even, adopt bulk freezing mode, a) soft soil roadbed is horizontal roadbed, and frigo adopts rectilinear frigo or film covering type frigo, b) soft soil roadbed is roadbed that is vertical or that tilt, and frigo adopts film covering type frigo; When soft soil roadbed on road distributed areas more scattered, adopt burst freezing method, a) soft soil roadbed is horizontal roadbed, and frigo adopts rectilinear frigo or film covering type frigo, b) soft soil roadbed is roadbed that is vertical or that tilt, and frigo adopts film covering type frigo; Wherein film covering type frigo forms by with the tabular or membranaceous slice structure of freezing loop and heat-barrier material, freezes loop and is made up of seamless steel pipe and is placed in below heat-barrier material, lay the plate of rigidity or the film of flexibility above heat-barrier material; Rectilinear frigo (4) need in road surfacing heat insulation layer (3);
3. determine quantity and the riding position of frigo, lay frigo;
4. install external equipment to frigo, wherein refrigerant is that the frigo external equipment of liquid nitrogen is primarily of storage nitrogen groove, liquid nitrogen tank car and distributor composition; Refrigerant is the frigo external equipment of hypothermic saline is Freezing Station, and Freezing Station forms primarily of compressor, condenser, evaporimeter, brine pump and choke valve;
5. pass into refrigerant to implement to freeze, make roadbed quick freezing in three days, roadbed solidification point reaches-20 DEG C.
2. the soft soil roadbed consolidation by freezing method of one according to claim 1, it is characterized in that, described step 3. in, there is weak substratum in soft soil roadbed or the Soft Soil Layer degree of depth is different, rectilinear frigo (4) be placed in the Soft Soil Layer of weak substratum or certain depth; When soft soil roadbed middle Soft Soil Layer distribution is relatively more even, frigo is settled in design; When soft soil roadbed on road distributed areas more scattered, then frigo is according to the Position Design riding position point of distributed areas, install frigo.
3. the soft soil roadbed consolidation by freezing method of one according to claim 1, is characterized in that, described step 2. in, described rectilinear frigo is the freezing pipe of taper by bottom and freezes loop and form, and the diameter of described freezing pipe is 80cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310213762.5A CN103276720B (en) | 2013-05-31 | 2013-05-31 | A kind of soft soil roadbed consolidation by freezing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310213762.5A CN103276720B (en) | 2013-05-31 | 2013-05-31 | A kind of soft soil roadbed consolidation by freezing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103276720A CN103276720A (en) | 2013-09-04 |
| CN103276720B true CN103276720B (en) | 2015-12-02 |
Family
ID=49059326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310213762.5A Active CN103276720B (en) | 2013-05-31 | 2013-05-31 | A kind of soft soil roadbed consolidation by freezing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103276720B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111472343A (en) * | 2020-03-19 | 2020-07-31 | 中国矿业大学 | Bidirectional reinforced freezing device and working method |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103850244B (en) * | 2014-03-04 | 2016-01-13 | 中交四航工程研究院有限公司 | Bagged sand bed course deep level of processing soft soil foundation reinforcing method under a kind of refrigerated environment |
| CN104532826A (en) * | 2014-07-07 | 2015-04-22 | 中国科学院寒区旱区环境与工程研究所 | Refrigeration structure of power transmission tower foundation in permafrost region |
| CN104594149B (en) * | 2014-12-03 | 2017-01-11 | 中国科学院青海盐湖研究所 | Frozen soil layer road structure and construction method thereof |
| CN105239557B (en) * | 2015-08-30 | 2017-04-12 | 中国科学院武汉岩土力学研究所 | Device and method for accelerating consolidation of soft soil through combination of frost heaving and melting shrinking method and vacuum preloading |
| CN105421334A (en) * | 2015-11-10 | 2016-03-23 | 上海市机械施工集团有限公司 | Construction method for soil freezing |
| DE102016012843A1 (en) * | 2016-10-27 | 2018-05-03 | Linde Aktiengesellschaft | Combined freezer head for nitrogen brine icing |
| CN112663468A (en) * | 2020-12-11 | 2021-04-16 | 郑州铁路职业技术学院 | Non-excavation repairing method for frozen soil roadbed |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1534142A (en) * | 2003-04-01 | 2004-10-06 | 中国矿业大学 | Underground continuous wall frozen construction method |
| CN101881024A (en) * | 2010-06-28 | 2010-11-10 | 连云港港口工程设计研究院有限公司 | Freeze thawing consolidation method for silt soft foundation |
| CN102912788A (en) * | 2012-11-15 | 2013-02-06 | 陈绍文 | Method for constructing emergency passages rapidly on soft soil foundations |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3228728B2 (en) * | 1999-06-18 | 2001-11-12 | 錦城護謨株式会社 | Ground improvement method by board drain using freeze-thaw |
-
2013
- 2013-05-31 CN CN201310213762.5A patent/CN103276720B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1534142A (en) * | 2003-04-01 | 2004-10-06 | 中国矿业大学 | Underground continuous wall frozen construction method |
| CN101881024A (en) * | 2010-06-28 | 2010-11-10 | 连云港港口工程设计研究院有限公司 | Freeze thawing consolidation method for silt soft foundation |
| CN102912788A (en) * | 2012-11-15 | 2013-02-06 | 陈绍文 | Method for constructing emergency passages rapidly on soft soil foundations |
Non-Patent Citations (1)
| Title |
|---|
| 人工冻土强制解冻基本理论和技术研究;邱凡;《中国优秀硕士学位论文全文数据库.工程科技Ⅱ辑》;20070615(第6期);第16-21页 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111472343A (en) * | 2020-03-19 | 2020-07-31 | 中国矿业大学 | Bidirectional reinforced freezing device and working method |
| CN111472343B (en) * | 2020-03-19 | 2021-07-09 | 中国矿业大学 | Bidirectional reinforced freezing device and working method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103276720A (en) | 2013-09-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103276720B (en) | A kind of soft soil roadbed consolidation by freezing method | |
| SHENG et al. | A potential new frost heave mechanism in high-speed railway embankments | |
| CN104695964B (en) | Subway shield tunnel freeze entering method | |
| CN105804761B (en) | Construction method suitable for liquefied sand stratum shield near-distance passing through building | |
| CN206784453U (en) | The concrete foundation anti-freeze expansion structure of Frozen Ground Area | |
| CN110080202B (en) | Horizontal freezing reinforcement structure for foundation pit bottom and construction method | |
| CN105239585A (en) | In-pile freezing structure of deep underground space and constructing method | |
| CN104675408A (en) | Liquid nitrogen freezing system of high water pressure super-long-distance large-sectional tunnel and method of quickly changing shield tail brushes | |
| CN103541762B (en) | A kind of High aititude severe cold rich water tunnel faces the antifreeze water discharge method of combination forever | |
| CN104806253A (en) | Construction method for opening hole between rectangular pipe jacking channels | |
| CN103061230B (en) | Construction method of technology utilizing ground source heat pump to cool and melt frozen road surfaces and drain boards for construction | |
| CN105239606A (en) | Inter-pile freezing structure of deep underground space and constructing method | |
| Han et al. | Use of geosynthetics for performance enhancement of earth structures in cold regions | |
| CN101892620A (en) | High intensity freezing damage prevention waterproof cushion layer | |
| CN105421178A (en) | Heating-layer pavement for cold region and construction technology thereof | |
| CN101418565A (en) | Qinghai-tibet railway permafrost wetland ground treatment technique | |
| CN103836258B (en) | Permafrost region buried pipeline thaw collapse prevention and controls that hot pin combines with coarse-grained soil and device | |
| CN110055980A (en) | A kind of thermoelectric cooling friction pile and construction method | |
| CN109339075A (en) | Landslide emergency control technology management method | |
| CN105908587B (en) | A kind of Frozen Ground Area roadbed heat insulating construction method | |
| CN109268068A (en) | Frozen Ground Area constructing metro tunnel causes the prediction technique of surface settlement control value | |
| CN205557533U (en) | Freeze structure in deep underground space's stake | |
| CN109537630B (en) | Reinforcing method for synergistic effect of steel pipe shed and frozen soil | |
| CN112031008A (en) | Controllable reinforced concrete strong freezing pile continuous wall and construction method thereof | |
| CN104594149B (en) | Frozen soil layer road structure and construction method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |