CN110295608A - A kind of hot dehumidification supporting construction of loess foundation pit and its construction method - Google Patents
A kind of hot dehumidification supporting construction of loess foundation pit and its construction method Download PDFInfo
- Publication number
- CN110295608A CN110295608A CN201910642571.8A CN201910642571A CN110295608A CN 110295608 A CN110295608 A CN 110295608A CN 201910642571 A CN201910642571 A CN 201910642571A CN 110295608 A CN110295608 A CN 110295608A
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- foundation pit
- loess
- tube
- pressure steam
- low pressure
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Greenhouses (AREA)
Abstract
The invention discloses a kind of hot dehumidification supporting construction of loess foundation pit and its construction methods, including being provided with several U-tubes on heating tube, return pipe, low pressure steam boiler, heating tube, wherein, each U-tube is inserted in loess base in the region of loess foundation pit to be dug, the water outlet of low pressure steam boiler is successively connected through heating tube, each U-tube and return pipe with the water inlet of low pressure steam boiler, the supporting construction can be realized the supporting of loess foundation pit, and construction is simple, at low cost.
Description
Technical field
The invention belongs to ground pattern foundation pit supporting structure field, it is related to a kind of hot dehumidification supporting construction of loess foundation pit and its construction party
Method.
Background technique
It is common that in profile in dry highland of Loess Plateau area, height, which is more than the upright loess slope of 20m,.If loess soil mass of foundation pit is contained
Water is reduced to 10% hereinafter, then non-support loess foundation pit vertical cut depth can greatly improve.Based on this thought, applicant
It is proposed a kind of new loess foundation ditch strengthening method-hot dehumidification method for strengthening.This method drives hole slope soil by applying high temperature, with heating power
Intracorporal moisture generates movement, and the reinforcing scope soil body is gradually discharged, and makes to cheat the significant decrease of slope water content of soil, to significantly mention
High strength of loess is stable to achieve the purpose that hole slope.
It is proposed the research achievement in terms of the main theory foundation of hot dehumidification method for strengthening is unsaturated soil body water-energy budget.It is existing
Research provides foundation to scientific knowledge and evaluation unsaturation soil body hydro-thermal problem, has had revealed that out that temperature gradient moves moisture
The driving effect of shifting, after applying temperature gradient to the soil body, soil body moisture will be migrated from high-temperature region to low-temperature space, cause temperature higher
Region water content of soil reduces.After hot dehumidification method for strengthening applies a big temperature gradient to the soil body, it is higher to will lead to temperature
Hole slope water content of soil is greatly reduced, and hole slope soil strength greatly improves therewith, so that reaching maintenance hole slope stablizes purpose.
Existing foundation pit supporting method adds the reinforcements such as nail, stake, anchor in the soil body mostly, changes the natural of hole Zhou Tuti
The length of structure, reinforcement is also restrained, and project cost is high.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, a kind of hot dehumidification supporting knot of loess foundation pit is provided
Structure and its construction method, which can be realized the supporting of loess foundation pit, and construction is simple, at low cost.
In order to achieve the above objectives, the hot dehumidification supporting construction of loess foundation pit of the present invention include heating tube, it is return pipe, low
Several U-tubes are provided on pressure steam boiler, heating tube, wherein each U-tube is inserted in loess base to Stabilization of Loess base
In the region in hole, the water outlet of low pressure steam boiler successively enters water through heating tube, U-tube and return pipe and low pressure steam boiler
Mouth is connected.
The surface in the region of loess foundation pit to be dug offers several soil layers drillings in loess base, wherein a soil layer bores
Hole corresponds to a U-tube, wherein each U-tube is inserted in corresponding soil layer drilling, and is backfilled with yellow mud in the drilling of each soil layer
Slurry.
It further include for detecting the temperature sensor of low pressure steam boiler exit steam temperature, for controlling low-pressure steam
The controller of boiler and Temperature Humidity Sensor for monitoring temperature and humidity in loess foundation pit, wherein controller with it is warm and humid
Output end, the output end of temperature sensor and the control terminal of low pressure steam boiler of degree sensor are connected.
It is provided with outlet valve on heating tube, is provided with back-water valve (BWV) on return pipe.
The aperture of soil layer drilling is 120mm.
Low pressure steam boiler is Horizontal electric low pressure steam boiler and Horizontal type natural gas low pressure steam boiler.
The construction method of the hot dehumidification supporting construction of loess foundation pit of the present invention the following steps are included:
1) before loess excavation of foundation pit, along the reinforcing scope for excavating boundary and determining the hole slope soil body of loess foundation pit；
2) soil layer drilling is drilled through in the reinforcing scope of the hole slope soil body；
3) each U-tube on heating tube is inserted in corresponding soil layer drilling, then the drilling of each soil layer is backfilled；
4) heating tube, U-tube, return pipe and low pressure steam boiler are connected, the high-temperature water of low pressure steam boiler output
Vapour successively through heating tube 3 and each U-tube, is then back in low pressure steam boiler by return pipe, with heating and the drainage soil body.
The temperature of the high-temperature water of low pressure steam boiler output is less than or equal to 300 DEG C.
The length of U-tube is 1.2 times of loess foundation depth.
The distance between U-tube and soil stabilization zone boundary are 0.4 times of loess foundation depth；
The distance between adjacent U-tube is 0.4 times of loess foundation depth.
The invention has the following advantages:
The hot dehumidification supporting construction of loess foundation pit of the present invention and its construction method are when specific operation, by unsaturated soil
Water-energy budget theory is applied to loess foundation pit supporting project, is added by the high-temperature water vapor being passed through into U-tube to loess
Heat and the drainage soil body, then carry out the excavation of loess foundation pit, project cost is small, and environmentally protective, changes existing pattern foundation pit supporting structure again
Method adds the practice of the reinforcements such as nail, stake, anchor in the soil body, ensure that the natural structure of hole Zhou Tuti to greatest extent, also favorably
In solving the problems, such as existing reinforcement length limited.
Detailed description of the invention
Fig. 1 is perspective view of the invention；
Fig. 2 cuts open body figure for of the invention；
Fig. 3 is the pipeline detail drawing of U-tube 2 in the present invention.
Wherein, 1 be low pressure steam boiler, 2 be U-tube, 3 be heating tube, 4 be return pipe, 5 be soil layer drilling.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
With reference to Fig. 1, Fig. 2 and Fig. 3, the hot dehumidification supporting construction of loess foundation pit of the present invention includes heating tube 3, return pipe
4, low pressure steam boiler 1, be provided with several U-tubes 2 on heating tube 3, wherein each U-tube 2 is inserted in be added in loess base
Gu in the region of loess foundation pit, the water outlet of low pressure steam boiler 1 is successively steamed through heating tube 3, U-tube 2 and return pipe 4 and low pressure
The water inlet of boiler furnace 1 is connected.
The surface in the region of loess foundation pit to be dug offers several soil layers drillings 5 in loess base, wherein a soil layer bores
Hole 5 corresponds to a U-tube 2, wherein each U-tube 2 is inserted in corresponding soil layer drilling 5, and is backfilled in each soil layer drilling 5
Yellow mud.
The invention also includes for detecting 1 exit steam temperature of low pressure steam boiler temperature sensor, for controlling
The controller of low pressure steam boiler 1 and Temperature Humidity Sensor for monitoring temperature and humidity in loess foundation pit, wherein control
Device is connected with the control terminal of the output end of Temperature Humidity Sensor, the output end of temperature sensor and low pressure steam boiler 1.
It is provided with outlet valve on heating tube 3, is provided with back-water valve (BWV) on return pipe 4；The aperture of soil layer drilling 5 is 120mm；It is low
Pressure steam boiler 1 is Horizontal electric low pressure steam boiler and Horizontal type natural gas low pressure steam boiler.
The construction method of the hot dehumidification supporting construction of loess foundation pit of the present invention the following steps are included:
1) before loess excavation of foundation pit, along the reinforcing scope for excavating boundary and determining the hole slope soil body of loess foundation pit；
2) soil layer drilling 5 is drilled through in the reinforcing scope of the hole slope soil body；
3) each U-tube 2 is inserted in corresponding soil layer drilling 5, then each soil layer drilling 5 is filled；
4) heating tube 3, U-tube 2, return pipe 4 and low pressure steam boiler 1 are connected, the height that low pressure steam boiler 1 exports
Then warm water vapour is back in low pressure steam boiler 1, to heat and dredge successively through heating tube 3 and each U-tube 2 by return pipe 4
Dry ground body.
Specifically, the temperature for the high-temperature water that low pressure steam boiler 1 exports is less than or equal to 300 DEG C；The length of U-tube 2 is Huang
1.2 times of native foundation depth；The distance between U-tube 2 and soil stabilization zone boundary are 0.4 times of loess foundation depth；Phase
The distance between adjacent U-tube 2 is 0.4 times of loess foundation depth.
Controller and temperature sensor jointly control low pressure steam boiler 1 output steam temperature, Temperature Humidity Sensor and
Controller synergy monitors the temperature and water content data during soil mass consolidation.
Above-described embodiment is merely a preferred embodiment of the present invention, and it is not intended to limit the protection scope of the present invention, as long as using
Design principle of the invention, and the non-creative variation worked and made is carried out on this basis, it should belong to of the invention
Within protection scope.
Claims (10)
1. a kind of hot dehumidification supporting construction of loess foundation pit, which is characterized in that including heating tube (3), return pipe (4), low-pressure steam
Boiler (1), several U-tubes (2), wherein each U-tube (2) is inserted in the region in loess base to Stabilization of Loess foundation pit,
The water outlet of low pressure steam boiler (1) is successively through heating tube (3), U-tube (2) and return pipe (4) and low pressure steam boiler (1)
Water inlet is connected.
2. the hot dehumidification supporting construction of loess foundation pit according to claim 1, which is characterized in that loess to be dug in loess base
The surface in the region of foundation pit offers several soil layer drillings (5), wherein the corresponding U-tube (2) of a soil layer drilling (5),
In, each U-tube (2) is inserted in corresponding soil layer drilling (5), and is backfilled with yellow mud in each soil layer drilling (5).
3. the hot dehumidification supporting construction of loess foundation pit according to claim 1, which is characterized in that further include for detecting low pressure
It the temperature sensor of steam boiler (1) exit steam temperature, the controller for controlling low pressure steam boiler (1) and is used for
Monitor the Temperature Humidity Sensor of temperature and humidity in loess foundation pit, wherein the output end of controller and Temperature Humidity Sensor, temperature
The control terminal of the output end and low pressure steam boiler (1) of sensor is connected.
4. the hot dehumidification supporting construction of loess foundation pit according to claim 1, which is characterized in that heating tube is provided on (3)
Outlet valve, return pipe are provided with back-water valve (BWV) on (4).
5. the hot dehumidification supporting construction of loess foundation pit according to claim 1, which is characterized in that the aperture of soil layer drilling (5)
For 120mm.
6. the hot dehumidification supporting construction of loess foundation pit according to claim 1, which is characterized in that low pressure steam boiler (1) is
Horizontal electric low pressure steam boiler and Horizontal type natural gas low pressure steam boiler.
7. a kind of construction method of the hot dehumidification supporting construction of loess foundation pit described in claim 2, which is characterized in that including following step
It is rapid:
1) before loess excavation of foundation pit, along the reinforcing scope for excavating boundary and determining the hole slope soil body of loess foundation pit；
2) soil layer drilling (5) is drilled through in the reinforcing scope of the hole slope soil body；
3) each U-tube (2) is inserted in corresponding soil layer drilling (5), then each soil layer drilling (5) is backfilled；
4) heating tube (3), U-tube (2), return pipe (4) and low pressure steam boiler (1) are connected, low pressure steam boiler (1) is defeated
Superheated vapor out is then back to low pressure steam boiler by return pipe (4) successively through heating tube (3) and each U-tube (2)
(1) in, with heating and the drainage soil body.
8. the construction method of the hot dehumidification supporting construction of loess foundation pit according to claim 7, which is characterized in that low-pressure steam
The temperature of the high-temperature water of boiler (1) output is less than or equal to 300 DEG C.
9. the construction method of the hot dehumidification supporting construction of loess foundation pit according to claim 7, which is characterized in that U-tube (2)
Length be 1.2 times of loess foundation depth.
10. the construction method of the hot dehumidification supporting construction of loess foundation pit according to claim 7, which is characterized in that U-tube
(2) with the distance between soil stabilization zone boundary is loess foundation depth 0.4 times；
The distance between adjacent U-tube (2) is 0.4 times of loess foundation depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910642571.8A CN110295608A (en) | 2019-07-16 | 2019-07-16 | A kind of hot dehumidification supporting construction of loess foundation pit and its construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910642571.8A CN110295608A (en) | 2019-07-16 | 2019-07-16 | A kind of hot dehumidification supporting construction of loess foundation pit and its construction method |
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| CN110295608A true CN110295608A (en) | 2019-10-01 |
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| CN201910642571.8A Pending CN110295608A (en) | 2019-07-16 | 2019-07-16 | A kind of hot dehumidification supporting construction of loess foundation pit and its construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111254950A (en) * | 2020-02-18 | 2020-06-09 | 河海大学 | Low-temperature freezing slide-resistant pile for hydrodynamic landslide, and manufacturing method and freezing method thereof |
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| CN102943480A (en) * | 2012-10-09 | 2013-02-27 | 西安科技大学 | Loess foundation pit supporting method |
| CN204570664U (en) * | 2015-01-19 | 2015-08-19 | 浙江大学 | A kind of thermal vacuum prepressing device with hot type band drain of super reinforcement of soft soil |
| JP2017179080A (en) * | 2016-03-29 | 2017-10-05 | 三菱ケミカル株式会社 | Aliphatic polyester resin composition and drain material made from the composition |
| CN207032215U (en) * | 2017-06-20 | 2018-02-23 | 天津大学 | A kind of water circulation type ground heater |
| CN109853517A (en) * | 2019-02-18 | 2019-06-07 | 中交天津港湾工程研究院有限公司 | A kind of U-shaped circulating hot water consolidation draining system and its construction method |
| CN208996019U (en) * | 2017-09-30 | 2019-06-18 | 宁波大学 | A kind of heat drain consolidation system |
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2019
- 2019-07-16 CN CN201910642571.8A patent/CN110295608A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5656239A (en) * | 1989-10-27 | 1997-08-12 | Shell Oil Company | Method for recovering contaminants from soil utilizing electrical heating |
| CN102943480A (en) * | 2012-10-09 | 2013-02-27 | 西安科技大学 | Loess foundation pit supporting method |
| CN204570664U (en) * | 2015-01-19 | 2015-08-19 | 浙江大学 | A kind of thermal vacuum prepressing device with hot type band drain of super reinforcement of soft soil |
| JP2017179080A (en) * | 2016-03-29 | 2017-10-05 | 三菱ケミカル株式会社 | Aliphatic polyester resin composition and drain material made from the composition |
| CN207032215U (en) * | 2017-06-20 | 2018-02-23 | 天津大学 | A kind of water circulation type ground heater |
| CN208996019U (en) * | 2017-09-30 | 2019-06-18 | 宁波大学 | A kind of heat drain consolidation system |
| CN109853517A (en) * | 2019-02-18 | 2019-06-07 | 中交天津港湾工程研究院有限公司 | A kind of U-shaped circulating hot water consolidation draining system and its construction method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111254950A (en) * | 2020-02-18 | 2020-06-09 | 河海大学 | Low-temperature freezing slide-resistant pile for hydrodynamic landslide, and manufacturing method and freezing method thereof |
| CN111254950B (en) * | 2020-02-18 | 2021-06-01 | 河海大学 | Low-temperature freezing slide-resistant pile for hydrodynamic landslide, and manufacturing method and freezing method thereof |
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Application publication date: 20191001 |
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