CN105181736A - Rock and earth mass frost heaving parameter in-situ tester - Google Patents
Rock and earth mass frost heaving parameter in-situ tester Download PDFInfo
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- CN105181736A CN105181736A CN201510502088.1A CN201510502088A CN105181736A CN 105181736 A CN105181736 A CN 105181736A CN 201510502088 A CN201510502088 A CN 201510502088A CN 105181736 A CN105181736 A CN 105181736A
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Abstract
The invention discloses a rock and earth mass frost heaving parameter in-situ tester. The tester comprises a test probe, a control device and a data collection device. The test probe comprises a hollow shaft, an elastic air bag, a thermal insulation layer, a heat exchange sheet and a protection sleeve which are distributed in order from inside to outside. The upper end and the lower end of the elastic air bag are fixed on the hollow shaft through flanges. A frost heaving force monitoring device and a frost heaving displacement monitoring device are arranged between the hollow shaft and the air bag. The control device comprises a temperature control device and a pressure control device. The temperature control device is connected with the heat exchange sheet through a thermal insulation pipe. The pressure control device is connected with the elastic air bag through a pressure pipe. The data collection device is connected with a sensor arranged on the test probe. The tester has advantages of accurate result, low cost, easy operation and the like.
Description
Technical field
The present invention relates to cold district rock-soil engineering in-situ field tests, be specifically related to a kind of testing tool surveying Rock And Soil frost heave parameter.
Background technology
Rock And Soil frost heave parameter comprises frozen-heave factor and the frost-heave force of Rock And Soil, the rational condition precedent of Obtaining Accurate Shi Han district underground engineering structure designing and calculating of Rock And Soil frost heave parameter, the parameter testing of rock mass frost heave mainly contains the experiment of indoor frost heave and the monitoring of on-the-spot frost-heave force.Indoor frost heave experiment has the advantages such as efficient and convenient, testing cost is low, but the preparation of shop experiment sample destroys original structure and the state of Rock And Soil, and cannot the stress state at accurate simulation scene and groundwater condition, the rock mass frost heave parameter of laboratory experiment gained cannot reflect the frost heaving characteristic of Rock And Soil strictly according to the facts, and its measuring accuracy is limited; On-the-spot frost-heave force monitoring is by burying pressure transducer underground between country rock and underground structure, the frost-heave force of monitoring country rock, the method accurately can obtain the frost-heave force of rock mass, but the method needs pre-buried sensor in Underground Construction process, acquired results only can be used for the rationality that test design calculates, and cannot be used for designing and calculating, there is hysteresis quality, also there is monitoring periods long, the shortcomings such as monitoring cost is high.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of result accurately, low cost, be easy to the Rock And Soil frost heave parameter in-situ test instrument that operates.
Technical scheme: for solving the problems of the technologies described above, Rock And Soil frost heave parameter in-situ test instrument provided by the invention, comprises test probe, control device and data collector, wherein:
Described test probe comprises quill shaft, elastic bag, heat insulation layer, heat exchanger fin and the protective sleeve arranged successively from inside to outside, the upper and lower two ends of described elastic bag are fixed on quill shaft by ring flange, are furnished with frost-heave force monitoring device and frost heave displacement monitor between described quill shaft and air bag;
Described control device comprises temperature control equipment and pressure control device, and described temperature control equipment is connected by thermo-insulating pipe line with heat exchanger fin, and described pressure control device is connected by pressure piping with elastic bag;
Described data collector is connected with the sensor be arranged on test probe.
As preferably, described sensor comprises displacement transducer and pressure transducer, described frost-heave force monitoring device comprises along the radially-arranged head rod of quill shaft, spring and pressure transducer, the two ends of described connecting link are connected with elastic bag inwall, and described spring and pressure transducer are series on head rod; Described frost heave displacement monitor comprises along radially-arranged second connecting link of quill shaft and displacement transducer, and the two ends of described connecting link are connected with elastic bag inwall, and institute's displacement sensors is series on the second connecting link.
As preferably, described sensor also comprises temperature sensor, and described temperature sensor is arranged in protective sleeve both sides and elastic bag both sides.
As preferably, described heat exchanger fin is that the connecting line of adjacent plate joint adopts expansion joint to connect, and often organizes heat exchanger fin and is made up of heat-exchange tube, adopt same journey to be connected in parallel between heat-exchange tube along elastic bag outer wall four groups of heat exchanger fins circumferentially.
As preferably, the entrance and exit place of described heat-exchange tube is also provided with temperature sensor.
As preferably, described elastic bag is made up of elastic rubber material, and length is 1m, and external diameter is 105mm; Described quill shaft xsect is circular, and at bottom 10cm scope quincuncial arrangement air-filled pore, at distance 25cm, 50cm and 75cm place, quill shaft bottom, reserved connecting link passes through hole.
As preferably, institute's displacement sensors and pressure transducer divide three layers of vertical interlaced to arrange, vertical interval is 25cm.
As preferably, described heat-exchange tube is square copper pipe, and the length of side is 3mm, and tube pitch is 3mm, is filled with anti freezing solution in heat-exchange tube.
The present invention provides the method for testing of above-mentioned Rock And Soil frost heave parameter in-situ test instrument simultaneously, and its concrete steps are as follows:
The first step, loaded by test probe in site inspection boring, the elastic bag in test probe expands under charge pressure effect, is arranged on the telescopic pressure of inside air bag and displacement monitor and air bag inwall synchronous extension;
Second step, after test probe and the wall of a borehole close contact, temperature control equipment provides low-temperature circulating fluid by thermo-insulating pipe line to the heat exchange pipe in test probe, utilize the low-temperature circulating fluid in heat-exchange tube and the temperature difference between boring surrounding rock body to absorb heat in rock mass, thus freeze rock mass;
3rd step, the frost-heave force of pressure transducer and displacement transducer monitoring boring surrounding rock body and frost heaving amount is utilized to change in time, utilize temperature sensor Real-Time Monitoring rock mass, test probe, the temperature of heat-exchange tube import and outlet changes in time, utilize the thermal physical property parameter of Monitoring Data inverting rock mass, calculate the frozen-heave factor of rock mass, evaluate the frost heave of rock mass.
During use, Rock And Soil frost heave parameter in-situ test instrument of the present invention, comprises test probe, thermo-insulating pipe line, pressure piping, temperature control equipment, pressure control device and data collector.Test probe is connected with temperature control equipment by thermo-insulating pipe line; Temperature control equipment is provided for the low-temperature receiver and the thermal source that freeze and add Rock And Soil around thermic boring; Pressure control device is provided for the pressure required for elastic bag expansion; Data collector collecting temperature sensor, pressure transducer and displacement transducer Monitoring Data; Test probe is connected with pressure control device and temperature control equipment with thermo-insulating pipe line respectively by pressure piping.Test probe comprises elastic bag, heat insulation layer, protective sleeve, quill shaft, connecting link, spring, ring flange, heat exchanger fin, temperature sensor, displacement transducer and pressure transducer; The upper and lower two ends of elastic bag are fixed on quill shaft by ring flange, and connecting link passes perpendicularly through quill shaft reserving hole and is connected with elastic bag inwall, spring and pressure transducer, form frost-heave force monitoring device; Connecting link passes perpendicularly through quill shaft reserving hole and is connected with elastic bag inwall and displacement transducer, forms the wall of a borehole frost heave displacement monitor; Heat insulation layer is pasted onto outside elastic bag; Heat exchanger fin is laid between heat insulation layer and protective sleeve, is connected with temperature control equipment by thermo-insulating pipe line; Heat exchanger fin is made up of four groups of heat-exchange tubes, adopts same journey to be connected in parallel between heat-exchange tube, and connecting line adopts expansion joint to connect.
Heat-exchange tube is square copper pipe, and the length of side is 3mm, and tube pitch is 3mm, is anti freezing solution in heat-exchange tube.Temperature sensor is arranged in protective sleeve both sides, elastic bag both sides, heat exchange pipe entrance and exit.Elastic bag is elastic rubber material, and length is 1m, and external diameter is 105mm.Quill shaft xsect is circular, and distance quill shaft bottom 10cm scope quincuncial arrangement air-filled pore, at distance 25cm, 50cm and 75cm place, quill shaft bottom, reserved connecting link passes through hole.Displacement and pressure transducer divide three layers of vertical interlaced to arrange, vertical interval is 25cm.
Beneficial effect: rock mass frost heave in-situ test instrument of the present invention reflects the impact on rock mass heat transmissibility and frost heave of the crustal stress states of rock mass, groundwater condition, rock mass structure characteristic strictly according to the facts, and compared with testing with indoor frost heave, its measuring accuracy is higher; The rock mass thermal physical property parameter of rock mass frost heave in-situ test instrument test gained of the present invention and frost heave parameter can be directly used in the designing and calculating of cold district underground structure, solve the hysteresis quality problem of underground structure frost-heave force field monitoring; Testing bore holes of the present invention can utilize geotechnical engineering investigation to hole, easy to operate, test period is short, testing cost is low; The rock mass frost heave parameter of the present invention's test can instruct tunnel antifreezing heat insulation system schema to select, and suits the remedy to the case and makes antifreeze the setting up defences of tunnel in cold area have more specific aim, solves cold district's underground works freeze injury difficult problem, and save construction costs from root.
Except technical matters, the technical characteristic forming technical scheme and the advantage brought by the technical characteristic of these technical schemes that the present invention recited above solves, the advantage that the other technologies feature comprised in the other technologies problem that Rock And Soil frost heave parameter in-situ test instrument of the present invention can solve, technical scheme and these technical characteristics bring, will be described in more detail by reference to the accompanying drawings.
Accompanying drawing explanation
Fig. 1 is the structural representation of Rock And Soil frost heave parameter tester in the embodiment of the present invention;
Fig. 2 is the elevation drawing of test probe in Fig. 1;
Fig. 3 is the cross-sectional view of test probe;
Fig. 4 is the structural representation of the heat exchanger fin in test probe;
In figure: 1 pressure control device; 2 liquid nitrogen bottles; 3 temperature control equipments; 4 data collectors; 5 borings; 6 test probes; 7 pressure pipings; 8 thermo-insulating pipe lines; 9 wires; 10 quill shafts; 11 protective sleeves; 12 heat exchanger fins; 13 heat insulation layers; 14 elastic bags; 15 connecting links; 16 springs; 17 pressure transducers; 18 displacement transducers; 19 air-filled pores; 20 ring flanges; 21 expansion joints; 22 temperature sensors; 23 heat-exchange tubes.
Embodiment
Embodiment:
The Rock And Soil frost heave parameter in-situ test instrument of the present embodiment as shown in Figure 1, comprise the pressure control device 1 being arranged in boring 5 outside, liquid nitrogen bottle 2, temperature control equipment 3 and data collector 4, and the test probe 6 be arranged in boring 5, both are connected with wire 9 by pressure piping 7, thermo-insulating pipe line 8.Wherein temperature control equipment 3 is provided for the low-temperature receiver of Rock And Soil around freezing borehole, is connected to test probe 6 by thermo-insulating pipe line 8; Pressure control device 1 is provided for the pressure required for elastic bag expansion, is connected to test probe 6 by pressure piping.Data collector 4, for gathering the Monitoring Data of each sensor, is connected to each sensor on test probe 6 by wire 9.
As shown in Figures 2 and 3, test probe comprises quill shaft 10, elastic bag 14, heat insulation layer 13, heat exchanger fin 12 and the protective sleeve 11 from inside to outside arranged successively, and elastic bag about 14 two ends are fixed on quill shaft 10 by ring flange 20.Quill shaft 10 has multiple preformed hole, and is radially equipped with many connecting links 15, wherein head rod passes perpendicularly through the first preformed hole and elastic bag 14 inwall, spring 16 is connected with pressure transducer 17, forms frost-heave force monitoring device; Second connecting link passes perpendicularly through the second preformed hole and is connected with elastic bag 14 inwall and displacement transducer 18, forms the wall of a borehole frost heave displacement monitor.The bottom of quill shaft 10 is furnished with the air-filled pore 19 be communicated with inside and outside elastic bag 14.Temperature sensor 22 is arranged in protective sleeve 11 both sides, elastic bag 14 both sides, heat exchange pipe entrance and exit; Monitoring Data is fed back to outside data collector by temperature sensor 22, pressure transducer 17 and displacement transducer 18.Heat insulation layer 13 is pasted onto outside elastic bag 14, and heat exchanger fin 12 is laid between heat insulation layer 13 and protective sleeve 11, is connected to outside temperature control equipment by thermo-insulating pipe line.Along elastic bag 14 outer wall circumferentially, the connecting line of joint adopts expansion joint 21 to connect to four groups of heat exchanger fins 12.
As shown in Figure 4, often organize heat exchanger fin 12 and be made up of heat-exchange tube 23, between heat-exchange tube 23, adopt same journey to be connected in parallel.
During manufacture, elastic bag is made up of elastic rubber material, and length is 1m, and external diameter is 105mm.Quill shaft xsect is circular, and at bottom 10cm scope quincuncial arrangement air-filled pore, at distance 25cm, 50cm and 75cm place, quill shaft bottom, reserved connecting link passes through hole.Displacement transducer and pressure transducer divide three layers of vertical interlaced to arrange, vertical interval is 25cm.Heat-exchange tube is square copper pipe, and the length of side is 3mm, and tube pitch is 3mm, is anti freezing solution in heat-exchange tube.
During use, the elastic bag in test probe expands under charge pressure effect, is arranged on the telescopic pressure of inside air bag and displacement monitor and air bag inwall synchronous extension.After test probe and the wall of a borehole close contact, temperature control equipment provides low-temperature circulating fluid by thermo-insulating pipe line to the heat exchange pipe in test probe, utilize the low-temperature circulating fluid in heat-exchange tube and the temperature difference between boring surrounding rock body to absorb heat in rock mass, thus freeze rock mass.The frost-heave force of pressure transducer and displacement transducer monitoring boring surrounding rock body and frost heaving amount is utilized to change in time, utilize temperature sensor Real-Time Monitoring rock mass, test probe, the temperature of heat-exchange tube import and outlet changes in time, utilize the thermal physical property parameter of Monitoring Data inverting rock mass, calculate the frozen-heave factor of rock mass, evaluate the frost heave of rock mass.
Below by reference to the accompanying drawings embodiments of the present invention are described in detail, but the present invention is not limited to described embodiment.For those of ordinary skill in the art, in the scope of principle of the present invention and technological thought, multiple change, amendment, replacement and distortion are carried out to these embodiments and still falls within the scope of protection of the present invention.
Claims (9)
1. a Rock And Soil frost heave parameter in-situ test instrument, comprises test probe, control device and data collector, it is characterized in that:
Described test probe comprises quill shaft, elastic bag, heat insulation layer, heat exchanger fin and the protective sleeve arranged successively from inside to outside, the upper and lower two ends of described elastic bag are fixed on quill shaft by ring flange, are furnished with frost-heave force monitoring device and frost heave displacement monitor between described quill shaft and air bag;
Described control device comprises temperature control equipment and pressure control device, and described temperature control equipment is connected by thermo-insulating pipe line with heat exchanger fin, and described pressure control device is connected by pressure piping with elastic bag;
Described data collector is connected with the sensor be arranged on test probe.
2. Rock And Soil frost heave parameter in-situ test instrument according to claim 1, it is characterized in that: described sensor comprises displacement transducer and pressure transducer, described frost-heave force monitoring device comprises along the radially-arranged head rod of quill shaft, spring and pressure transducer, the two ends of described connecting link are connected with elastic bag inwall, and described spring and pressure transducer are series on head rod; Described frost heave displacement monitor comprises along radially-arranged second connecting link of quill shaft and displacement transducer, and the two ends of described connecting link are connected with elastic bag inwall, and institute's displacement sensors is series on the second connecting link.
3. Rock And Soil frost heave parameter in-situ test instrument according to claim 1, it is characterized in that: described sensor also comprises temperature sensor, described temperature sensor is arranged in protective sleeve both sides and elastic bag both sides.
4. Rock And Soil frost heave parameter in-situ test instrument according to claim 1, it is characterized in that: described heat exchanger fin is along elastic bag outer wall four groups of heat exchanger fins circumferentially, the connecting line of adjacent plate joint adopts expansion joint to connect, often organize heat exchanger fin to be made up of heat-exchange tube, between heat-exchange tube, adopt same journey to be connected in parallel.
5. Rock And Soil frost heave parameter in-situ test instrument according to claim 4, is characterized in that: the entrance and exit place of described heat-exchange tube is also provided with temperature sensor.
6. Rock And Soil frost heave parameter in-situ test instrument according to claim 1, it is characterized in that: described elastic bag is made up of elastic rubber material, length is 1m, and external diameter is 105mm; Described quill shaft xsect is circular, and at bottom 10cm scope quincuncial arrangement air-filled pore, at distance 25cm, 50cm and 75cm place, quill shaft bottom, reserved connecting link passes through hole.
7. Rock And Soil frost heave parameter in-situ test instrument according to claim 2, is characterized in that: institute's displacement sensors and pressure transducer divide three layers of vertical interlaced to arrange, vertical interval is 25cm.
8. Rock And Soil frost heave parameter in-situ test instrument according to claim 4, it is characterized in that: described heat-exchange tube is square copper pipe, the length of side is 3mm, and tube pitch is 3mm, is filled with anti freezing solution in heat-exchange tube.
9. the method for testing of Rock And Soil frost heave parameter in-situ test instrument according to claim 1, is characterized in that comprising the following steps:
The first step, loaded by test probe in site inspection boring, the elastic bag in test probe expands under charge pressure effect, is arranged on the telescopic pressure of inside air bag and displacement monitor and air bag inwall synchronous extension;
Second step, after test probe and the wall of a borehole close contact, temperature control equipment provides low-temperature circulating fluid by thermo-insulating pipe line to the heat exchange pipe in test probe, utilize the low-temperature circulating fluid in heat-exchange tube and the temperature difference between boring surrounding rock body to absorb heat in rock mass, thus freeze rock mass;
3rd step, the frost-heave force of pressure transducer and displacement transducer monitoring boring surrounding rock body and frost heaving amount is utilized to change in time, utilize temperature sensor Real-Time Monitoring rock mass, test probe, the temperature of heat-exchange tube import and outlet changes in time, utilize the thermal physical property parameter of Monitoring Data inverting rock mass, calculate the frozen-heave factor of rock mass, evaluate the frost heave of rock mass.
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| CN109765260A (en) * | 2019-03-28 | 2019-05-17 | 凌贤长 | Frost heave monomer, detection device and its detection method of flexible non-contact formula detection soil |
| CN109870477A (en) * | 2019-03-28 | 2019-06-11 | 凌贤长 | A kind of the frost heave monomer and its detection method of non-contact detection soil |
| CN109945928A (en) * | 2019-04-08 | 2019-06-28 | 兰州理工大学 | A kind of salt frost heave tester for realizing coupled heat-moisture-stress effect |
| CN110231361A (en) * | 2019-06-29 | 2019-09-13 | 郑州航空工业管理学院 | Runway Surface freezing-thawing resistance monitoring device |
| CN111189992A (en) * | 2018-11-14 | 2020-05-22 | 新疆水利水电科学研究院 | Engineering soil body frost heaving force testing device |
| CN112903424A (en) * | 2021-03-17 | 2021-06-04 | 中国能源建设集团江苏省电力设计院有限公司 | Integrated multifunctional rock-soil body thermal performance in-situ tester |
| CN113281375A (en) * | 2021-03-17 | 2021-08-20 | 中国能源建设集团江苏省电力设计院有限公司 | Rock-soil body thermal property in-situ test and frost heaving force in-situ test method |
| CN114184635A (en) * | 2021-12-21 | 2022-03-15 | 河北交通职业技术学院 | Seasonal frozen soil area tunnel frozen-expansion force simulation test device and use method thereof |
| CN115266805A (en) * | 2022-07-20 | 2022-11-01 | 青海省地质环境监测总站 | Automatic frozen soil freeze-thawing monitoring system and monitoring method |
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| CN107014686A (en) * | 2017-04-24 | 2017-08-04 | 河海大学 | The device and method of the complicated Loading of the native table of simulation |
| CN107014686B (en) * | 2017-04-24 | 2019-11-12 | 河海大学 | Simulate the device and method of native table complexity Loading |
| CN108519405A (en) * | 2018-05-02 | 2018-09-11 | 中国科学院寒区旱区环境与工程研究所 | A set of testing equipment for studying power and deformation relationship during body frost heaving |
| CN111189992A (en) * | 2018-11-14 | 2020-05-22 | 新疆水利水电科学研究院 | Engineering soil body frost heaving force testing device |
| CN109870477B (en) * | 2019-03-28 | 2021-05-14 | 凌贤长 | Non-contact frost heaving monomer for detecting soil and detection method thereof |
| CN109765260A (en) * | 2019-03-28 | 2019-05-17 | 凌贤长 | Frost heave monomer, detection device and its detection method of flexible non-contact formula detection soil |
| CN109870477A (en) * | 2019-03-28 | 2019-06-11 | 凌贤长 | A kind of the frost heave monomer and its detection method of non-contact detection soil |
| CN109765260B (en) * | 2019-03-28 | 2021-05-14 | 凌贤长 | Flexible non-contact frost heaving monomer for detecting soil, detection device and detection method thereof |
| CN109945928A (en) * | 2019-04-08 | 2019-06-28 | 兰州理工大学 | A kind of salt frost heave tester for realizing coupled heat-moisture-stress effect |
| CN110231361A (en) * | 2019-06-29 | 2019-09-13 | 郑州航空工业管理学院 | Runway Surface freezing-thawing resistance monitoring device |
| CN112903424A (en) * | 2021-03-17 | 2021-06-04 | 中国能源建设集团江苏省电力设计院有限公司 | Integrated multifunctional rock-soil body thermal performance in-situ tester |
| CN113281375A (en) * | 2021-03-17 | 2021-08-20 | 中国能源建设集团江苏省电力设计院有限公司 | Rock-soil body thermal property in-situ test and frost heaving force in-situ test method |
| CN113281375B (en) * | 2021-03-17 | 2023-02-03 | 中国能源建设集团江苏省电力设计院有限公司 | Rock-soil body thermal property in-situ test and frost heaving force in-situ test method |
| CN114184635A (en) * | 2021-12-21 | 2022-03-15 | 河北交通职业技术学院 | Seasonal frozen soil area tunnel frozen-expansion force simulation test device and use method thereof |
| CN114184635B (en) * | 2021-12-21 | 2023-09-08 | 河北交通职业技术学院 | Seasonal frozen soil area tunnel frost heaving force simulation test device and application method thereof |
| CN115266805A (en) * | 2022-07-20 | 2022-11-01 | 青海省地质环境监测总站 | Automatic frozen soil freeze-thawing monitoring system and monitoring method |
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