CN104264657B - The method of process highway frozen soil foundation - Google Patents
The method of process highway frozen soil foundation Download PDFInfo
- Publication number
- CN104264657B CN104264657B CN201410464932.1A CN201410464932A CN104264657B CN 104264657 B CN104264657 B CN 104264657B CN 201410464932 A CN201410464932 A CN 201410464932A CN 104264657 B CN104264657 B CN 104264657B
- Authority
- CN
- China
- Prior art keywords
- frozen soil
- spray
- ash
- cement
- powder
- 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
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of method processing highway frozen soil foundation, comprise the steps: to bore several holes on pretreated frozen soil foundation; Selection section branch borehole, arranges temp probe; In part boring, insert Double-layer hot-water circulation pipe, pass into hot water, after frozen soil foundation melts, take out Double-layer hot-water circulation pipe; Adopt rig, creep into and spray feed compressed air; Stop spray feed compressed air, spray feed has the cement of preset temperature, after spray feed is a certain amount of, changes spray compressed air; Stir predetermined number of times again, lay rubble and geotextiles.Implement the present invention, powder spray piling and surrounding soil form compound foundation, do not need precompressed can obtain higher Bearing Capacity of Composite Foundation and composite deformation ability, himself character circle is between rigidity and tenderness stake.Treating depth can reach 10 ~ 15m, and construction technology is simple, and vibrate little, noise is low, pollution-free, workable, obviously can strengthen the stability of permanent frozen soil foundation.
Description
Technical field
The present invention relates to the method for improvement ground or soil, especially a kind of processing method of frozen soil foundation.
Background technology
Frozen soil is due to the special engineering geologic property of its low temperature, mutability, responsive to temperature etc., and the road built on it easily produces the diseases such as subgrade settlement, pavement cracking, depression, frost boil, drastically influence stability and the safe passing of Permafrost Area road.
Existing method comprises and arranges isolation layer, hot pin or sunbreaker: below the bottom or road bed of roadbed, a certain degree of depth is laid isolation layer and is used for increasing embankment thermal resistance, reduce the thaw depth of roadbed, regulate buried depth and the form of roadbed anthropogenic heating, this roadbed is called isolation layer roadbed.At warm season, the height of the outer temperature of roadbed than roadbed below inner and substrate, heat-barrier material can well prevent heat from outflowing in roadbed from roadbed, prevents frozen soil foundation from heating up.But when entering cold season; ground temperature is higher than temperature; ever-frozen ground dispels the heat to air with the heat balance recovering ever-frozen ground; and the heat insulating material in roadbed still remains thermal resistance effect; namely stop roadbed to underlie the heat radiation of ever-frozen ground to air, heat insulating material plays a part to be unfavorable for protecting ever-frozen ground during this period.Therefore, isothermal holding measure can not change the development trend of the ground-gas interchange of heat caused because of constructing roadbed.
Broken, slabstone roadbed utilizes broken, the slabstone of certain grating to have the characteristic of variable coefficient of thermal conductivity because the air in hole whether convection current occurs to realize the cooling of roadbed inside.Broken, slabstone roadbed is porous media structure, and when air-flow flows through rubble surface, due to gas and broken, slabstone is surperficial there is temperature difference and produce exchange heat between, it has heat shield effect at warm season, has convective cooling effect at cold season.But this kind roadbed is comparatively large to building stones demand, requirement is higher.Broken, the weathering of slabstone, pore plugging all can affect effect and the subgrade stability of convection current.Optimum aperture problem is also the difficult point controlled.
Hot pin is a kind of system utilizing the convection current of liquid gas shift and circulation to realize delivered heat.The unidirectional heat transfer of hot pin, does not oppositely conduct heat.In warm season, hot pin can quit work, and its result of use is subject to the impact of many factors, particularly freezing period length problem, if freezing period, is short, melt the phase long, freezing nucleus not yet just all melted before next winter approached, so just lost the using value of hot pin.The cost of hot-mix recycling is higher, and part adopts the location of hot-mix recycling often to produce around hot pin, can produce certain sedimentation in certain limit, and its dominant mechanism is worth research further.
Sunbreaker can stop the sun to the direct radiation of roadbed sunny side side slope, considerably reduces the radiant heat that roadbed absorbs, significantly reduces the temperature of roadbed, reduces simultaneously or intercepts the rainwater infiltration roadbed with latent heat, cuts off the rainwater supply of roadbed side slope.But sunbreaker panel is yielding, damage, and the Permafrost Area temperature difference is large, and the sunbreaker material amount of expanding with heat and contract with cold is large, and sunbreaker in use causes malformation, damage because of internal stress, is unfavorable for that engineering measure uses lastingly.
Described in upper, compared with passive cooling measure, existing active cooling measure can better keep frozen earth roadbed stability.But the core of these measures is still protected " permanent frozen soil foundation, as far as possible not disturbance or few disturbance frozen soil foundation ".And each measure has its specific aim and limitation in the middle of practical application, the relevant issues of frozen soil foundation are not solved.
Summary of the invention
Goal of the invention: provide a kind of method processing highway frozen soil foundation, to solve the problems referred to above that prior art exists.
Technical scheme: a kind of method processing highway frozen soil foundation, comprises the steps:
Step 1, on pretreated frozen soil foundation, bore several holes;
Step 2, selection section branch borehole, arrange temp probe;
Step 3, in part boring, insert Double-layer hot-water circulation pipe, pass into hot water, after frozen soil foundation melts, taking-up Double-layer hot-water circulation pipe;
Step 4, employing rig, creep into and spray feed compressed air;
Step 5, stopping spray feed compressed air, spray feed has the cement of preset temperature, after spray feed is a certain amount of, changes spray compressed air;
Step 6, stir predetermined number of times again, lay rubble and geotextiles.
In a further embodiment, comprise the steps:
S1, at pretreated frozen soil foundation place, according to subgrade construction code requirement, oven drying method is adopted to measure this region and freeze soil's water content;
S2, use Pneumatic down-the-hole drill to hole, aperture is 6 ~ 7cm about, the position in hole by quincuncial arrangement, hole be centrally located at the powder spray piling center that will construct, spacing is no more than 2m;
S3, at this frozen soil place selected temperature exploration hole, the center line distance of holing in the center line distance S2 of exploration hole from being 25 ~ 30cm, peephole by 0.3 ~ 0.7m below earth's surface along the degree of depth every 0.5 ~ 0.6m arrange temp probe, it is long that depth of probe is greater than stake;
S4, in multiple holes of having bored, insert Double-layer hot-water circulation pipe, with 70 ~ 80 in pipe
othe hot water circuit of C;
S5, after the frozen soil foundation of pre-punishment melts, the temperature that namely all temp probes of exploration hole detect is greater than 0
oc, takes out Double-layer hot-water circulation pipe;
S6, location powder spray piling rig, align stake position, leveling fuselage.Bore under starting rig, when drill bit to be mixed is close to ground, start air compressor machine.Open powder spray rig, start to creep into, simultaneously spray feed high pressure gas, stop after being drilled into design elevation to bore;
S7, close and to supply gas gate, spray feed is from the special cement had in the ash can of heat insulation function; When confirming at the bottom of cement to stake, oppositely promote drill bit, lifting limit, limit spray feed cement; When drill bit be promoted to be about 50cm apart from ground time, close powder transmitter, change spray compressed air to ground;
S8, first time stop powder after, sinking of shifting gears immediately, stirs again until complete design stirs pass again.When stir drill bit complete last all over to stir again be promoted to stake top time original place stir 1 ~ 2min; Lay graded broken stone on stake top after stirring completes, in macadam, lay geotextiles.
Said method also comprises the method making Powder-jet Pile material, is specially:
K1, employing early-strength cement, by weight percentage, comprising: grade of compressive strength is the sulphate aluminium cement of 42.5MPa, 83 ~ 86%; Portland cement, 0.7 ~ 1.2%; Natural anhydrite, 9.0 ~ 9.8%; Natural dihydrate gypsum, 2.2 ~ 2.7%; Quicklime, 0.7 ~ 1%; Antifreezing agent-natrium nitrosum, 1.5 ~ 2.5%; It is heavy by 15% that cement consumption is no less than pile soil;
K2, carry out grinding by raw materials used, controlling material specific surface area after grinding is 400 ± 30 ㎡/㎏;
K3, water/binder ratio are not more than 0.4;
The moisturizing of one deck polyvinyl chloride film is laid on K4, powder spray piling top after completion of stirring, then covers cotton felt and straw bag insulation.
Further, in the step s 7, if frozen soil water content is lower than 30%, injects water from discharge tube simultaneously or adopt slurry spray.In step K 3, adopt slurry spray when frozen soil moisture content is less than 30%.In step s 8, if frozen soil water content is greater than 70%, powder incorporation need be increased and stir pass again.Described ash can comprises:
Tank body, inner hollow, bottom is funnel-form and is provided with ash can air inlet port and ash can discharging opening, and top seal being provided with is communicated with ash can gas outlet inside and outside tank body and ash can ash inlet; Stove pipe, along grey tank wall, is bottom-uply wound on ash can, and heating air inlet mouth is positioned at below, and heating gas outlet is positioned at top.The cross section of described stove pipe is semicircle, caliber 60 ~ 80mm, wall thickness 10 ~ 15mm, and pipe is apart from 400 ~ 600mm, and outside adopts enclose insulation.
Beneficial effect: implement the present invention, powder spray piling and surrounding soil form compound foundation, do not need precompressed can obtain higher Bearing Capacity of Composite Foundation and composite deformation ability, himself character circle is between rigidity and tenderness stake.Treating depth can reach 10 ~ 15m, and construction technology is simple, and vibrate little, noise is low, pollution-free, workable, obviously can strengthen the stability of permanent frozen soil foundation.
Accompanying drawing explanation
Fig. 1 a is powder spray piling layout schematic diagram of the present invention; In figure, 1 is temperature sensing hole.
Fig. 1 b is A place enlarged drawing in Fig. 1 a.
Fig. 1 c is place place, temperature sensing hole schematic cross-sectional view in Fig. 1 a, and in figure, 2 is warm probe.
Fig. 2 is the structural representation with the cement ash can of heat insulation function of the present invention; In figure, 101-ash can gas outlet; 102-ash can ash inlet; 103-stove pipe; 104-heating air inlet mouth; 105-ash can air inlet port; 106-ash can discharging opening; 107-heats gas outlet.
Fig. 3 is the invention process schematic diagram.In figure, 201-permanent frozen soil foundation; 202-powder spray piling; 203-graded broken stone; 204-geotextiles.
Detailed description of the invention
As shown in Fig. 1 a to Fig. 3, implementation process of the present invention is as follows:
As illustrated in figs. ia and ib, at the frozen soil foundation place for punishing with powder spray piling, first according to the requirement of subgrade construction specification, adopting oven drying method to measure this region and freezing soil's water content.After mensuration completes, location Pneumatic down-the-hole drill, starts rig and holes, aperture 70mm, the position in temperature sensing hole 1 by quincuncial arrangement, hole be centrally located at the powder spray piling center (powder spray piling diameter is 50cm) that will construct, spacing is no more than 2m.At this frozen soil place selected temperature exploration hole, the distance of exploration hole center to center distance previous step rig institute drill center is 25cm.
As illustrated in figure 1 c, peephole arranges temp probe along the degree of depth every 0.5m by 0.5m below earth's surface, and depth of probe is long slightly larger than stake.In the hole of having bored, insert the double-deck circulating hot water pipe that diameter is 60mm, hot-water line is connected with heat exchanger or portable hot water boiler, and in pipe, water temperature is 70 ~ 80
oc.After to Powder-jet Pile footpath, frozen soil melts, namely all temp probes of exploration hole detect that temperature is greater than 0
oc, takes out double-deck circulating hot water pipe.
Location pile dusting machine, places hydraulic walking underframe.Stand is holded up by adjustment hydraulic system.The rig of pile dusting machine aims at the frozen soil after melting, leveling fuselage.Start rig, adding the mechanism of decompressor by guiding provides pressure.Pile dusting machine provides power by transmission system.When drill bit to be mixed is close to ground, start air compressor machine.Rotation limit, drill bit limit is crept into, simultaneously spray feed high pressure gas, until stop after getting into design elevation to bore.Closedown is supplied gas gate, spray feed cement.
As shown in Figure 2, cement consumption is controlled by election weighing system, from the cement (temperature 40 ~ 50 in ash can
0c) discharge tube is entered by charging aperture.If frozen soil water content is lower than 30%, discharge tube needs water filling or adopts slurry spray.When confirming at the bottom of cement to stake, oppositely promote drill bit, lifting limit, limit, to spray feed cement in the soil body be stirred, makes the soil body and cement fully mix and stir.When drill bit is promoted to apart from ground 50cm, close powder transmitter, change spray compressed air to ground, pile terminates.
After first time stopping spray feed cement, sinking of shifting gears immediately, stirs again within the scope of underground certain depth, now stop dusting, the degree of depth to designing requirement remixing is crept on rotation limit, drill bit limit, then reverse edge rotates limit lifting, the soil body and powder are are fully mixed and stirred, until complete design stirs pass again.If frozen soil water content is greater than 70%, powder incorporation need be increased and stir pass again.Adopt low strain dynamic method to detect pile quality, amount detection is 25% of total amount of pile.Lay the thick graded broken stone of about 50cm on powder spray piling top, then put into geotextiles in graded broken stone.
The cement ash can with heat insulation function shown in Fig. 2,101 and 105 are respectively ash can gas outlet and ash can air inlet port, and 102,106 are respectively ash can ash inlet and ash can discharging opening.103 for design ash can outer ring around mild steel stove pipe, cross section be semicircle, caliber 80mm, wall thickness 10mm, pipe distance 600mm.Stove pipe adopts rock wool as enclose insulation outward, the hot vapour that packaged boiler boils water is connected to the hot steam pipe being looped around ash can by heating air inlet mouth 104, carry out hot vapour insulation, being connected with boiler by heating gas outlet 107 makes hot gas cycle again, ensures temperature in heating pipe.Discharging opening 6 is connected with the charging aperture of pile dusting machine by rubber tube, and the internal diameter of rubber tube is 30mm.
As shown in Figure 3,201 is permanent frozen soil foundation, lays the graded broken stone of about 50cm, then lay geotextiles 204 in macadam 203, form compound foundation mattress layer on powder spray piling 202 top.
Powder spray piling design of material:
Adopt early-strength cement: grade of compressive strength is the sulphate aluminium cement of 42.5MPa, 84%; Portland cement, 0.9%; Natural anhydrite, 9.1%; Natural dihydrate gypsum, 2.3%; Quicklime, 0.8%; Antifreezing agent-natrium nitrosum, 2%.Forbid to use the cement inferior making moist, lump, go bad.The 15%(that cement consumption is no less than pile soil heavy adopts when frozen soil moisture content is at 30%-70%, and being greater than 70% need increase consumption); Water/binder ratio be not more than 0.4 (slurry spray, frozen soil moisture content lower than 30% time adopt).
Carry out grinding by raw materials used, after control grinding, material specific surface area is 400 ± 30 ㎡/㎏.
Material after grinding is imported in ash can and stores.
Cement powders to be injected in the soil body of stirring the abundant mix with the soil body, to complete stir pass again after lay the moisturizing of one deck polyvinyl chloride film thereon, then cover cotton felt and straw bag insulation.
Principle of the present invention can be widely used in the process of multiple permanent frozen soil foundation.
Thinking of the present invention is the measure changing original simple protection of permafrost, takes powder spraying cement in permanent frozen soil foundation to form the Treatment Methods of rigid pile, to fall into problem to the hot thaw collapse solving permanent frozen soil foundation existence.
Advantage of the present invention and effect are that powder spray piling makes reinforced material with powder, when frozen soil water content is between 30% ~ 70%, does not need to inject additional water to ground, fully can draw the moisture in soil.If frozen soil water content is lower than 30%, need water be injected by discharge tube or adopt slurry spray; If frozen soil water content is higher than 70%, then need increase powder incorporation and stir pass again.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple equivalents to technical scheme of the present invention, these equivalents all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible combination.
In addition, also can be combined between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (2)
1. process a method for highway frozen soil foundation, it is characterized in that, comprise the steps:
S1, at pretreated frozen soil foundation place, according to subgrade construction code requirement, adopt oven drying method measure freezes soil's water content;
S2, use Pneumatic down-the-hole drill to hole, aperture 6 ~ 7cm, the position in hole by quincuncial arrangement, hole be centrally located at the powder spray piling center that will construct, spacing is no more than 2m;
S3, at this frozen soil place selected temperature exploration hole, the center line distance of holing in S2 from being 25 ~ 30cm, peephole by 0.3 ~ 0.7m below earth's surface along the degree of depth every 0.5 ~ 0.6m arrange temp probe, it is long that depth of probe is greater than stake;
S4, in multiple holes of having bored, insert Double-layer hot-water circulation pipe, by the hot water circuit of 70 ~ 80 DEG C in pipe;
S5, after the frozen soil foundation of pre-punishment melts, the temperature that namely all temp probes of exploration hole detect is greater than 0 DEG C, takes out Double-layer hot-water circulation pipe;
S6, location powder spray piling rig, align stake position, leveling fuselage;
Bore under starting rig, when drill bit to be mixed is close to ground, start air compressor machine;
Open powder spray rig, start to creep into, simultaneously spray feed gas, stop after being drilled into design elevation to bore;
S7, close and to supply gas gate, spray feed is from the special cement had in the ash can of heat insulation function; When confirming at the bottom of cement to stake, oppositely promote drill bit, lifting limit, limit spray feed cement; When drill bit is promoted to apart from ground 50cm, close powder transmitter, change spray compressed air to ground;
S8, first time stop powder after, sinking of shifting gears immediately, stirs until complete design stirs pass again again;
When stir drill bit complete last all over to stir again be promoted to stake top time original place stir 1 ~ 2min; Lay graded broken stone on stake top after stirring completes, in macadam, lay geotextiles;
Also comprise the method making Powder-jet Pile material, be specially:
K1, employing early-strength cement, by weight percentage, comprising: grade of compressive strength is the sulphate aluminium cement of 42.5MPa, 83 ~ 86%; Portland cement, 0.7 ~ 1.2%; Natural anhydrite, 9.0 ~ 9.8%; Natural dihydrate gypsum, 2.2 ~ 2.7%; Quicklime, 0.7 ~ 1%; Antifreezing agent-natrium nitrosum, 1.5 ~ 2.5%; It is heavy by 15% that cement consumption is no less than pile soil;
K2, carry out grinding by raw materials used, controlling material specific surface area after grinding is 400 ± 30 ㎡/㎏;
K3, water/binder ratio are not more than 0.4;
The moisturizing of one deck polyvinyl chloride film is laid on K4, powder spray piling top after completion of stirring, then covers cotton felt and straw bag insulation; In the step s 7, if frozen soil water content is lower than 30%, injects water from discharge tube simultaneously or adopt slurry spray;
In step K 3, adopt slurry spray when frozen soil moisture content is less than 30%;
In step s 8, if frozen soil water content is greater than 70%, powder incorporation need be increased and stir pass again;
Described ash can comprises:
Tank body, inner hollow, bottom is funnel-form and is provided with ash can air inlet port (105) and ash can discharging opening (106), and top seal being provided with is communicated with ash can gas outlet (101) inside and outside tank body and ash can ash inlet (102);
Stove pipe (103), along grey tank wall, is bottom-uply wound on ash can, and heating air inlet mouth (104) is positioned at below, and heating gas outlet (107) is positioned at top.
2. the method for process highway frozen soil foundation as claimed in claim 1, is characterized in that, the cross section of described stove pipe is semicircle, caliber 60 ~ 80mm, wall thickness 10 ~ 15mm, and pipe is apart from 400 ~ 600mm, and outside adopts enclose insulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410464932.1A CN104264657B (en) | 2014-09-12 | 2014-09-12 | The method of process highway frozen soil foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410464932.1A CN104264657B (en) | 2014-09-12 | 2014-09-12 | The method of process highway frozen soil foundation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104264657A CN104264657A (en) | 2015-01-07 |
| CN104264657B true CN104264657B (en) | 2016-03-16 |
Family
ID=52156221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410464932.1A Active CN104264657B (en) | 2014-09-12 | 2014-09-12 | The method of process highway frozen soil foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104264657B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105597467A (en) * | 2015-11-18 | 2016-05-25 | 中船勘察设计研究院有限公司 | Dry jet mixing pile ash delivery tank dust removing device |
| CN107335675B (en) * | 2016-08-04 | 2019-07-23 | 宋贵顺 | A kind of administering method of household garbage field |
| CN109440825B (en) * | 2018-10-30 | 2021-03-02 | 保定市尚泉供水有限公司 | Heatable walling crib for municipal administration |
| CN109588167B (en) * | 2018-12-21 | 2021-02-02 | 昆山市华明绿化工程有限公司 | Gardens soil anti-freezing equipment |
| CN111979866B (en) * | 2020-08-31 | 2021-11-12 | 西南石油大学 | Roadbed anti-freezing structure in seasonal frozen soil area and construction method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0447020A (en) * | 1990-06-14 | 1992-02-17 | Fujikura Ltd | Ground freezing method using heat pipe |
| CN2405662Y (en) * | 1999-07-03 | 2000-11-15 | 柳州欧维姆建筑机械有限公司 | Powder-spraying device |
| CN2589513Y (en) * | 2002-12-26 | 2003-12-03 | 刘纪福 | Heat pipe foundation pile applied to permafrost zone |
| CN101418567A (en) * | 2007-10-22 | 2009-04-29 | 上海隧道工程股份有限公司 | Protective cutting construction method for tunnel segment |
| CN101709577A (en) * | 2009-10-23 | 2010-05-19 | 中煤第七十二工程处 | Quick-thawing method of frozen soil foundation |
| CN103485355A (en) * | 2013-10-17 | 2014-01-01 | 兰州理工大学 | Frame-heat anchor pipe structure for preventing and treating cold-region slope collapse due to freeze thawing and construction method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5238053A (en) * | 1992-04-03 | 1993-08-24 | Long Erwin L | Method of and system for warming road surface |
-
2014
- 2014-09-12 CN CN201410464932.1A patent/CN104264657B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0447020A (en) * | 1990-06-14 | 1992-02-17 | Fujikura Ltd | Ground freezing method using heat pipe |
| CN2405662Y (en) * | 1999-07-03 | 2000-11-15 | 柳州欧维姆建筑机械有限公司 | Powder-spraying device |
| CN2589513Y (en) * | 2002-12-26 | 2003-12-03 | 刘纪福 | Heat pipe foundation pile applied to permafrost zone |
| CN101418567A (en) * | 2007-10-22 | 2009-04-29 | 上海隧道工程股份有限公司 | Protective cutting construction method for tunnel segment |
| CN101709577A (en) * | 2009-10-23 | 2010-05-19 | 中煤第七十二工程处 | Quick-thawing method of frozen soil foundation |
| CN103485355A (en) * | 2013-10-17 | 2014-01-01 | 兰州理工大学 | Frame-heat anchor pipe structure for preventing and treating cold-region slope collapse due to freeze thawing and construction method |
Non-Patent Citations (3)
| Title |
|---|
| 浅谈粉喷桩的加固机理和施工工艺;杨立国;《中小企业管理与科技（上旬刊）》;20110805(第08期);第171-172页 * |
| 粉喷桩在处理铁路路基下软土中的应用;朱永军;《煤矿开采》;20030331;第8卷(第53期);第60-63页 * |
| 粉喷桩在道路路堤软土路堤处理中的应用;胡献文;《四川建材》;20110831;第37卷(第4期);第75-76页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104264657A (en) | 2015-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104264657B (en) | The method of process highway frozen soil foundation | |
| CN104695964B (en) | Subway shield tunnel freeze entering method | |
| CN102587365B (en) | Method for embedding precession-type backfill grouting ground source thermal energy conversion precast pile device into stratum | |
| CN104153269B (en) | Ever-frozen ground guard method under a kind of wide cut road structure leading resistance combination | |
| CN104633996B (en) | Water source heat pump recharging technical method | |
| CN104963334A (en) | Construction method for utilizing grouting freezing pipe to reinforce and freeze contact passage to restrain frost heaving and thaw collapsing | |
| CN107201908A (en) | A kind of construction method of the regional buried Central drain in tunnel of bitter cold | |
| CN103277103A (en) | None-full-depth freezing method for penetrating through ultra-thick water-rich bed rock in shaft deepening | |
| CN103938658A (en) | Structure capable of avoiding cold damage to high-temperature and unstable freeze soil area tunnel portal side slope | |
| CN110748358A (en) | Cold region tunnel entrance to a cave two-sided heat preservation system | |
| CN109403312A (en) | A kind of soft ground containing water hot setting method for protecting support | |
| CN107034874A (en) | Double-screw type slip casting type freezing plant and construction method | |
| CN203626848U (en) | Railway shield tunnel end jointly reinforced by horizontal freezing holes and pipe shed | |
| WO2018068409A1 (en) | Structure underlaid gob area filling expansion bag and construction method | |
| CN207377562U (en) | Mine Shaft Lining and constructing device in a kind of poor strata | |
| CN105088913A (en) | Subgrade structure in permafrost region | |
| CN107034900B (en) | Structure is administered to frozen soil side slope disease of slumping of hot melt | |
| CN106087636B (en) | Permafrost Area freeze thawing resistance heat accumulation horizontal proliferation ventilation curb structure | |
| CN105698582B (en) | Improve the preset energy ball geothermal heat exchanger of heat transfer efficiency | |
| CN210238157U (en) | Plateau permafrost region high-speed railway roadbed structure | |
| CN104912068B (en) | Improve the hollow round table screw type energy pilework of heat transfer efficiency | |
| CN102587399B (en) | Salivary flow ice prevention and management structure in cold zone | |
| CN103758145B (en) | Small-diameter cast-in-place tube pile composite foundation treatment method for permafrost foundation of Qinghai-Tibet highway | |
| Zheng et al. | Study on cause analysis and treatment measures of lining cracking and ballast bed freezing at tunnel portal in seasonally-frozen regions | |
| CN205276249U (en) | Hot reinforcing pile |
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 |