CN111254950B - Low-temperature freezing slide-resistant pile for hydrodynamic landslide, and manufacturing method and freezing method thereof - Google Patents
Low-temperature freezing slide-resistant pile for hydrodynamic landslide, and manufacturing method and freezing method thereof Download PDFInfo
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- CN111254950B CN111254950B CN202010099349.0A CN202010099349A CN111254950B CN 111254950 B CN111254950 B CN 111254950B CN 202010099349 A CN202010099349 A CN 202010099349A CN 111254950 B CN111254950 B CN 111254950B
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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
- E02D17/20—Securing of slopes or inclines
- E02D17/207—Securing of slopes or inclines with means incorporating sheet piles or piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/11—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means
- E02D3/115—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means by freezing
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a low-temperature freezing slide-resistant pile for hydrodynamic landslide, a manufacturing method and a freezing method thereof. The low-temperature freezing slide-resistant pile comprises a pile body, a refrigeration source for refrigerating the pile body, and a conveying pipeline which is connected with the refrigeration source and surrounds the pile body; the temperature sensor and the humidity sensor are respectively arranged on the pile body and used for detecting the temperature of the pile body and the water level of the pile body; the temperature sensor, the humidity sensor and the refrigeration source are controlled by the controller. The invention also discloses a preparation method and a freezing method of the low-temperature freezing slide-resistant pile. The invention increases the stability of the side slope by changing the state of the underground water around the pile body, solves the stability of the side slope caused by hydrodynamic force from the source, can realize accurate freezing of the underground water, and has simple structure and economic and reasonable freezing method.
Description
Technical Field
The invention relates to an anti-slide pile, a manufacturing method and a freezing method thereof, in particular to a low-temperature freezing anti-slide pile for hydrodynamic landslide, a manufacturing method and a freezing method thereof.
Background
Landslide is one of three global geological disasters, and the landslide causes huge casualties and economic losses to human beings every year. Especially, under the influence of hydrodynamic force, the hydrodynamic landslide of the near dam reservoir area poses huge threats to water conservancy and hydropower engineering. As a measure for slope management, the slide-resistant pile has the advantages of strong slide-resistant capability, wide adaptive conditions, safe construction and the like.
Most of the existing anti-slide piles for hydrodynamic landslides are provided with drainage measures to reduce the water level so as to reduce the influence of the drainage measures on the stability of the landslides. The anti-slide piles can only weaken the influence of hydrodynamic force to a certain extent, and the problem of slope stability reduction caused by water cannot be solved from the source.
Disclosure of Invention
The purpose of the invention is as follows: a first object of the present invention is to provide a low-temperature freezing slide pile for hydrodynamic landslide, which can solve the problem of the decrease in slope stability caused by hydrodynamic force from the source;
the second purpose of the invention is to provide a preparation method of the low-temperature freezing slide-resistant pile for hydrodynamic landslide;
a third object of the present invention is to provide a cryogenic freezing method for hydrodynamic landslides.
The technical scheme is as follows: the invention relates to a low-temperature freezing anti-slide pile for hydrodynamic landslide, which comprises a pile body, a refrigeration source for refrigerating the pile body, and a conveying pipeline connected with the refrigeration source and surrounding the pile body; the temperature sensor and the humidity sensor are respectively arranged on the pile body and used for detecting the temperature of the pile body and the water level of the pile body; the temperature sensor, the humidity sensor and the refrigeration source are controlled by the controller.
Preferably, the conveying pipeline comprises branch pipelines which are independent from each other and encircle the outer wall of the pile body.
Preferably, a branch control valve is respectively arranged between the branch pipeline and the refrigeration source.
Preferably, a master control valve is arranged on the conveying pipeline between the branch control valve and the refrigeration source.
Preferably, one end of the conveying pipeline is connected with the refrigeration source, and the other end of the conveying pipeline is communicated with the atmosphere.
Preferably, a temperature sensor and a humidity sensor are arranged on the pile body at the same height position as the conveying pipeline.
The invention provides a preparation method of the low-temperature freezing slide-resistant pile, which comprises the following steps:
(A1) manufacturing a pile body according to the underground water level condition;
(A2) excavating a pile hole, and putting a pile body into the pile hole;
(A3) a conveying pipeline, a temperature sensor and a humidity sensor are arranged on the pile body;
(A4) one end of the conveying pipeline is connected with a refrigeration source, and the other end of the conveying pipeline is communicated with the atmosphere; a control valve is arranged between the refrigerating source and the conveying pipeline;
(A5) the controller is respectively connected with the temperature sensor, the humidity sensor and the control valve.
The invention also provides a freezing method for freezing the slide-resistant pile at low temperature, which comprises the following steps:
(B1) a temperature sensor and a humidity sensor on the pile body acquire water level and water temperature information of the pile body and transmit the information to a controller;
(B2) and the controller controls the communication between the conveying pipeline at the corresponding water level and the refrigeration source to freeze according to the collected water level and water temperature information.
Preferably, in step (B2), the freezing time is determined by the desired thickness of the frozen wall;
the calculation formula of the frozen wall thickness is as follows:
p＝0.013H
Ed-frozen wall thickness, m; r-frozen wall radius, m; p-calculating the section soil pressure, wherein p is 0.013H; MPa; h-calculating the section depth, m; [ sigma ]]-the allowable stress of the frozen earth,
MPa; sigma-ultimate compressive strength of frozen soil, MPa; k-safety factor.
Preferably, the distance between adjacent pilings is less than twice the frozen wall thickness.
Has the advantages that: compared with the prior art, the invention can obtain the following beneficial effects: (1) the freezing circulating system is arranged on the pile body, so that the state of underground water around the pile body is changed to increase the stability of the side slope, and the stability of the side slope caused by hydrodynamic force is solved from the source. (2) The freezing at the corresponding water level is controlled by arranging mutually independent conveying pipelines at different heights on the pile body, so that the precise control of the freezing area is realized. (3) Can be according to the difference of real-time water level on the friction pile, the conveying pipeline of intercommunication refrigeration source and relevant position department freezes the water outside the friction pile, can enough satisfy the demand that freezes of different water levels, has avoided the excessive waste to the energy again. (4) The preparation method is simple and easy to implement, can meet the requirements of engineering construction, and is also suitable for large-scale production. (5) The freezing method is simple, convenient and efficient, the underground water level change and the temperature field around the pile body can be monitored through the controller and the sensors, the freezing range is determined, the thickness of the freezing wall can be controlled by controlling the time of introducing the refrigeration source, and the freezing requirement is met.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
As shown in fig. 1, wherein 1, a pile body; 2. a delivery conduit; 3. a refrigeration source; 4. and a controller.
The low-temperature freezing slide-resistant pile for the hydrodynamic landslide comprises a pile body 1, wherein concrete is poured on a reinforcement cage to form the pile body; the pile body cooling device further comprises a refrigeration source 3 for refrigerating the pile body 1 and a conveying pipeline 2 connected with the refrigeration source 3, the other end of the conveying pipeline 2 is communicated with the atmosphere, and the conveying pipeline 2 is wound on the pile body 1. The conveying pipeline 2 of the embodiment comprises branch pipelines, one end of each branch pipeline is connected with the refrigeration source 2, the other end of each branch pipeline is divided into branch pipelines which are independently arranged from top to bottom along the pile body 1, the branch pipelines with different heights are respectively annular pipelines which surround the pile body 1 for a circle, the upper and lower adjacent branch pipelines are not communicated, a branch control valve (not shown in the figure) for controlling the branch pipelines to be communicated with the refrigeration source 3 is arranged between each annular branch pipeline and the refrigeration source 3, and the spacing distance between the upper and lower adjacent branch pipelines is set according to needs; a main control valve is also arranged between the branch control valve and the refrigeration source 3 on the conveying pipeline 2. The conveying pipeline 2 can also be spirally wound from top to bottom along the pile body 1. The refrigeration source 3 of the invention is liquid nitrogen, and can also be other media which can cool the conveying pipeline 2, such as: saline water is introduced into the conveying pipeline 2, the conveying pipeline 2 is cooled, and the purposes of cooling the pile body 1 and freezing the water outside the pile body can be achieved. The temperature sensor and the humidity sensor are arranged on the pile body 1 (not shown in the figure) according to the position of the conveying pipeline 2, so that the humidity and the temperature around the pile body 1 can be accurately detected; the controller 4 is connected with temperature sensor, humidity transducer, each control valve for acquire water level and temperature information on the pile body 1, control pipeline 2 and the 3 intercommunications of refrigeration source of a certain height, thereby the pile body 1 cooling of this position department of control makes the peripheral water of pile body 1 freeze, realizes solving the problem of the side slope stability that hydrodynamic force caused from the source.
The invention provides a preparation method of the low-temperature freezing slide-resistant pile for hydrodynamic landslide, which comprises the following steps of:
(A1) manufacturing a pile body 1 according to the underground water level condition;
(A2) excavating a pile hole, and putting the pile body 1 into the pile hole;
(A3) a conveying pipeline 2, a temperature sensor and a humidity sensor are arranged on the pile body; the branch pipelines with different heights are respectively annular pipelines which surround the pile body 1 for a circle, the upper and lower adjacent branch pipelines are not communicated, and a branch control valve for controlling the branch pipelines to be communicated with the refrigeration source 3 is arranged between each branch pipeline and the refrigeration source 3; a main control valve is also arranged on the conveying pipeline 2 at the upstream of the branch control valves;
(A4) one end of a conveying pipeline 2 is connected with a refrigeration source 3, and the other end of the conveying pipeline is communicated with the atmosphere;
(A5) the controller 4 is connected to a temperature sensor, a humidity sensor, and each control valve.
In step 2, the distance between adjacent pile holes is less than twice the thickness of the frozen wall.
The invention also provides a freezing method for freezing the anti-slide pile at low temperature for hydrodynamic landslide, which comprises the following steps:
(B1) a temperature sensor and a humidity sensor on the pile body 1 acquire water level and water temperature information of the pile body 1 and transmit the information to the controller 4;
(B2) the controller 4 controls the communication between the conveying pipeline 2 at the corresponding water level and the refrigeration source 3 to freeze according to the collected water level and water temperature information; wherein the freezing time is determined by the desired thickness of the frozen wall;
the calculation formula of the frozen wall thickness is as follows:
p＝0.013H
Ed-frozen wall thickness, m; r-frozen wall radius, m; p-calculating the section soil pressure, wherein p is 0.013H; MPa; h-calculating the section depth, m; [ sigma ]]-the allowable stress of the frozen earth,
MPa; sigma-ultimate compressive strength of frozen soil, MPa; k-safety factor.
The freezing range of the anti-slide pile is larger than the distance between the two anti-slide piles, so that the freezing area formed by each anti-slide pile is connected into a whole, and the whole stability of the anti-slide pile is improved.
Claims (9)
1. A low-temperature freezing anti-slide pile for hydrodynamic landslide is characterized by comprising a pile body (1), a refrigeration source (3) for refrigerating the pile body (1), and a conveying pipeline (2) connected with the refrigeration source (3) and wound on the pile body (1); the temperature sensor and the humidity sensor are respectively arranged on the pile body (1) and used for detecting the temperature of the pile body (1) and the water level of the pile body (1); the temperature sensor, the humidity sensor and the refrigeration source (3) are controlled by a controller (4); the conveying pipeline (2) comprises branch pipelines which are mutually independent and encircle the pile body (1) along different heights of the pile body (1).
2. Cryo-frozen anti-slide pile for hydrodynamic landslide according to claim 1, wherein a sub-control valve is provided between the sub-pipe and the refrigeration source (3), respectively.
3. The cryofreezing anti-slide pile for hydrodynamic landslide according to claim 2, wherein a master control valve is arranged on the delivery pipe (2) between the sub-control valve and the refrigeration source (3).
4. Cryo-frozen anti-slide pile for hydrodynamic landslides according to claim 1 wherein the delivery duct (2) is connected at one end to a refrigeration source (3) and at the other end to the atmosphere.
5. Cryo-freezing anti-slide pile for hydrodynamic landslides according to claim 1 characterized by the fact that on the pile body (1) at the same height as the conveying pipe (2) there are provided temperature and humidity sensors.
6. A method of making a cryogenic freezing anti-skid pile for use in hydrodynamic landslide of claim 1 comprising the steps of:
(A1) manufacturing a pile body (1) according to the underground water level condition;
(A2) excavating a pile hole, and putting the pile body (1) into the pile hole;
(A3) a conveying pipeline (2), a temperature sensor and a humidity sensor are arranged on the pile body (1);
(A4) one end of the conveying pipeline (2) is connected with the refrigeration source (3), and the other end of the conveying pipeline is communicated with the atmosphere; a control valve is arranged between the refrigerating source (3) and the conveying pipeline (2);
(A5) the controller (4) is respectively connected with a temperature sensor, a humidity sensor and a control valve.
7. A freezing method of a cryogenically frozen anti-skid pile for hydrodynamic landslide of claim 1 comprising the steps of:
(B1) a temperature sensor and a humidity sensor on the pile body (1) collect water level and water temperature information of the pile body (1) and transmit the information to the controller (4);
(B2) the controller (4) controls the communication between the conveying pipeline (2) at the corresponding water level and the refrigeration source (3) to freeze according to the collected water level and water temperature information.
8. The freezing method of a cryogenic freezing anti-slip pile for hydrodynamic landslides as claimed in claim 7 wherein in step (B2), the freezing time is determined by the desired thickness of the frozen wall;
the calculation formula of the frozen wall thickness is as follows:
p＝0.013H
Ed-frozen wall thickness, m; r-frozen wall radius, m; p-calculating the section soil pressure, wherein p is 0.013H; MPa; h-calculating the section depth, m; [ sigma ]]-the allowable stress of the frozen earth,
MPa; sigma-ultimate compressive strength of frozen soil, MPa; k-safety factor.
9. The freezing method of a cryogenically frozen anti-slide pile for hydrodynamic landslide according to claim 8, wherein the distance between adjacent pile bodies (1) is less than twice the frozen wall thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010099349.0A CN111254950B (en) | 2020-02-18 | 2020-02-18 | Low-temperature freezing slide-resistant pile for hydrodynamic landslide, and manufacturing method and freezing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010099349.0A CN111254950B (en) | 2020-02-18 | 2020-02-18 | Low-temperature freezing slide-resistant pile for hydrodynamic landslide, and manufacturing method and freezing method thereof |
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| Publication Number | Publication Date |
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| CN111254950A CN111254950A (en) | 2020-06-09 |
| CN111254950B true CN111254950B (en) | 2021-06-01 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108867714A (en) * | 2018-07-20 | 2018-11-23 | 东北大学 | The pile foundation of a kind of anti-lifting by frost and thaw collapse is from refrigerating plant and its application method |
| CN109339075A (en) * | 2018-11-16 | 2019-02-15 | 中国地质科学院探矿工艺研究所 | Landslide emergency control technology management method |
| JP2019131964A (en) * | 2018-01-29 | 2019-08-08 | 鹿島建設株式会社 | Flow suppressing method |
| CN110295608A (en) * | 2019-07-16 | 2019-10-01 | 西安建筑科技大学 | A kind of hot dehumidification supporting construction of loess foundation pit and its construction method |
-
2020
- 2020-02-18 CN CN202010099349.0A patent/CN111254950B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019131964A (en) * | 2018-01-29 | 2019-08-08 | 鹿島建設株式会社 | Flow suppressing method |
| CN108867714A (en) * | 2018-07-20 | 2018-11-23 | 东北大学 | The pile foundation of a kind of anti-lifting by frost and thaw collapse is from refrigerating plant and its application method |
| CN109339075A (en) * | 2018-11-16 | 2019-02-15 | 中国地质科学院探矿工艺研究所 | Landslide emergency control technology management method |
| CN110295608A (en) * | 2019-07-16 | 2019-10-01 | 西安建筑科技大学 | A kind of hot dehumidification supporting construction of loess foundation pit and its construction method |
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| CN111254950A (en) | 2020-06-09 |
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