CN204086026U - A kind of self-reaction force formula deep hole Rock Foundation Test Under Static Pressure device - Google Patents
A kind of self-reaction force formula deep hole Rock Foundation Test Under Static Pressure device Download PDFInfo
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- CN204086026U CN204086026U CN201420533693.6U CN201420533693U CN204086026U CN 204086026 U CN204086026 U CN 204086026U CN 201420533693 U CN201420533693 U CN 201420533693U CN 204086026 U CN204086026 U CN 204086026U
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Abstract
The utility model discloses a kind of self-reaction force formula deep hole Rock Foundation Test Under Static Pressure device, device comprises bearing plate, loading system, displacement measurement system, data acquisition system (DAS) and hydraulic pressure support counter force system, hydraulic pressure support counter force system comprises hydraulic bar, sway brace and toothed reaction plate, hydraulic bar is connected with the high-pressure oil pipe of connecting fluid press pump, load box, when each sway brace does not open, each reaction plate is closed into barrel-shaped.The utility model utilizes hydraulic pressure support counterforce device to make package unit and enter petrosa to divide rock mass face build-in, counter-force is provided by hole wall rock mass, bearing plate, loading system and hydraulic pressure support counter force system integration assembling, compare existing equipment, structure is simple, installing/dismounting is convenient; Data acquisition system (DAS) directly gathers load box load and bearing plate displacement, and not by the restriction of the factor such as landform, batholith buried depth, measuring accuracy is high; After test completes, device each several part all reclaims, and can realize recycling, experimentation cost is low, and reliability is high.
Description
Technical field
The utility model relates to geotechnical engineering investigation field, is specifically related to a kind of self-reaction force formula deep hole Rock Foundation Test Under Static Pressure device.
Background technology
On-the-spot Rock Foundation Test Under Static Pressure can determine the load-bearing capacity of batholith more directly and accurately, plays directive function to the design of building pile foundation.A large amount of construction of current high level, high-rise building and all have very big demand to deep layer Rock Foundation Test Under Static Pressure to the research of the failure mechanism of deep layer batholith, and existing equipment and test method cannot meet actual requirement, mainly because existing shallow-layer load test equipment equipment when doing the larger Rock Foundation Test Under Static Pressure of buried depth installs difficulty, test figure deviation is comparatively large, is mostly only suitable for using under shallow-layer or manually digging hole condition; Though have the self-equilibrating Rock Foundation Test Under Static Pressure device mentioned can meet the requirement of degree of depth aspect in recent years, but its equipment can not reuse, high cost, does not meet application request more.Therefore there is larger defect in existing batholith load device in accuracy and practicality.
Summary of the invention
The technical problems to be solved in the utility model is, for existing batholith load device above shortcomings, a kind of self-reaction force formula deep hole Rock Foundation Test Under Static Pressure device is provided, not by the restriction of the factor such as landform, batholith buried depth, installing/dismounting is convenient in actual applications, meets the demand that current construction market is comparatively large to buried depth, landform is more complicated, measuring accuracy requires high, practical Rock Foundation Test Under Static Pressure.
The utility model for solving the problems of the technologies described above adopted technical scheme is:
A kind of self-reaction force formula deep hole Rock Foundation Test Under Static Pressure device, comprise bearing plate, loading system, displacement measurement system, data acquisition system (DAS) and hydraulic pressure support counter force system, described loading system is made up of load box, hydraulic pump, pressure transducer, described load box is arranged on bearing plate, the top of load box is connected with the hydraulic pump be arranged on earth's surface by high-pressure oil pipe, and described pressure transducer is arranged on high-pressure oil pipe; Described displacement measurement system is made up of datum line beam, reference stake, displacement transducer, displacement silk, and described datum line beam is arranged on earth's surface by reference stake, and displacement transducer is arranged on datum line beam, and the two ends of displacement silk connect bearing plate and displacement transducer; Described data acquisition system (DAS) is connected with pressure transducer and displacement transducer respectively (for gathering the signal of pressure transducer and displacement transducer);
Described hydraulic pressure support counter force system comprises hydraulic bar, sway brace and toothed reaction plate, described hydraulic bar is connected with the high-pressure oil pipe of connecting fluid press pump, load box, hydraulic bar lower end is disc, described sway brace is provided with some groups, is uniformly distributed around the lower end of described hydraulic bar, one end of each sway brace is hinged with the lower end of hydraulic bar, the other end is corresponding is connected with a reaction plate, described reaction plate is circular arc, and when each sway brace does not open, each reaction plate is closed into barrel-shaped.
By such scheme, described sway brace is provided with 6 groups, is that 60 ° of angles are uniformly distributed around described hydraulic bar.
The utility model device carries out the method for Rock Foundation Test Under Static Pressure, comprises the steps:
1) boring is to the rock stratum need doing Rock Foundation Test Under Static Pressure, and when design experiment, control aperture, hole depth, make to meet design requirement into the rock degree of depth, clear hole makes sediment at the bottom of hole reach requirement, and ensures at the bottom of hole smooth;
2) wire rope is utilized to hang at the bottom of hole by the substructure be made up of hydraulic pressure support counter force system, load box, bearing plate, displacement silk and high-pressure oil pipe, keep substructure vertical in decentralization process and be positioned at center, hole, the lower end of displacement silk is connected with bearing plate, and the upper end of displacement silk and high-pressure oil pipe extends to earth's surface;
3) equipment such as the hydraulic pump of ground table top, data acquisition system (DAS), pressure transducer, displacement transducer, datum line beam, reference stake and high-pressure oil pipe are installed, hydraulic pump is connected with the high-pressure oil pipe of ground table top, pressure transducer is arranged on high-pressure oil pipe, datum line beam is arranged on earth's surface by reference stake, displacement transducer is arranged on datum line beam, and data acquisition system (DAS) is connected with pressure transducer and displacement transducer respectively;
4) by step 2) described in substructure mention slightly, make it unsettled, open hydraulic pump, hydraulic bar is upheld, hydraulic bar drives sway brace to open, judge according to pressure sensor data change, when the force value sudden change that pressure transducer detects, reaction plate with enter the hole wall that petrosa divides and contact, now slowly transferring wire rope makes bearing plate transfer at the bottom of hole, by hydraulic pump, hydraulic bar is constantly pressurizeed, the tooth on reaction plate and hole wall are agreed with, reaction plate and hole wall build-in;
5) upper end of displacement silk is connected with displacement transducer (two ends of displacement silk respectively with bearing plate, displacement transducer connects), pass through hydraulic pump, load box, bearing plate is to hole bed rock base load application, then respectively by pressure transducer, displacement transducer detects the load of load box and the displacement (displacement of bearing plate is delivered to the displacement transducer on earth's surface by displacement silk) of bearing plate, data acquisition system (DAS) gathers the payload data of load box simultaneously, the displacement data of displacement transducer, thus obtain the displacement deformation data of batholith under different loading condition, load-displacement (Q-S) relation curve is obtained after process.
The pressure being subject to hydraulic pump when hydraulic bar in described step 4) makes reaction plate reach maximum reaction plate to bore hole pressure value to bore hole pressure
ptime close the hydraulic valve of hydraulic bar, hydraulic pump quits work.
In described step 5), single cycle load mode is adopted to hole bed rock base load application, the first order loads gets 1/5 of test maxium load value (test maxium load value is estimated according to relevant regulations), after this every grade is 1/10 of test maxium load value, every grade of load reach relatively stable after add next stage load, until load is incremented to test maxium load value step by step.
After off-test, the releasably equipment of table top, then successively to load box and hydraulic bar off-load, hydraulic bar retraction can pack up sway brace, thus reaction plate and hole wall are departed from, and then substructure is reclaimed by wire rope.
Principle of work of the present utility model: utilize hydraulic pressure support counter force system to make package unit and enter petrosa to divide rock mass face build-in, provide counter-force by hole wall rock mass.Hydraulic pressure support counter force system and load box, bearing plate form entirety, as the substructure of a whole set of test unit, substructure is put into after at the bottom of hole, hydraulic pressure support counter force system is connected with the hydraulic pump on earth's surface by high-pressure oil pipe (through pressure transducer), pressurizeed by hydraulic pump, sway brace opens, and makes reaction plate and enters the counter-force that petrosa position hole wall build-in provides Rock Foundation Test Under Static Pressure; The hydraulic valve of hydraulic bar is closed after build-in, hydraulic pump is connected with loading system by high-pressure oil pipe, by hydraulic pump, load box, bearing plate load application, data acquisition system (DAS) gathers load (pressure) data by pressure transducer, data acquisition system (DAS) is connected by displacement silk, displacement transducer with bearing plate simultaneously, gathers displacement data.
The beneficial effects of the utility model are:
1, the utility model self-reaction force formula deep hole Rock Foundation Test Under Static Pressure device utilizes hydraulic pressure support counterforce device to make package unit and enter petrosa to divide rock mass face build-in, counter-force is provided by hole wall rock mass, bearing plate, loading system and hydraulic pressure support counter force system integration assembling, compare existing equipment, structure is simple, installing/dismounting is convenient;
2, data acquisition system (DAS) directly gathers load box load and bearing plate displacement, and data precision is not by the restriction of the factor such as landform, batholith buried depth, and measuring accuracy is high;
3, after test completes, device each several part all reclaims, and can realize recycling, experimentation cost is low, and reliability is high.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model self-reaction force formula deep hole Rock Foundation Test Under Static Pressure device;
Fig. 2 is the structural representation of the utility model hydraulic pressure support counter force system;
In figure, 1-hydraulic pump, 2-data acquisition system (DAS), 3-displacement silk, 4-pressure transducer, 5-datum line beam, 6-hydraulic pressure support counter force system, 6a-hydraulic bar, 6b-sway brace, 6c-reaction plate, 7-load box, 8-bearing plate, 9-reference stake, 10-displacement transducer.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail.
With reference to shown in Fig. 1 ~ Fig. 2, self-reaction force formula deep hole Rock Foundation Test Under Static Pressure device described in the utility model, comprise bearing plate 8, loading system, displacement measurement system, data acquisition system (DAS) 2 and hydraulic pressure support counter force system, described loading system is made up of load box 7, hydraulic pump 1, pressure transducer 4, described load box 7 is arranged on bearing plate 8, the top of load box 7 is connected with the hydraulic pump 1 be arranged on earth's surface by high-pressure oil pipe, and described pressure transducer 4 is arranged on high-pressure oil pipe; Described displacement measurement system is made up of datum line beam 5, reference stake 9, displacement transducer 10, displacement silk 3, described datum line beam 5 is arranged on earth's surface by reference stake 9, displacement transducer 10 is arranged on datum line beam 5, and the two ends of displacement silk 3 connect bearing plate 8 and displacement transducer 10; Described data acquisition system (DAS) 2 is connected with pressure transducer 4 and displacement transducer 10 (for gathering the signal of pressure transducer 4 and displacement transducer 10) respectively;
Described hydraulic pressure support counter force system 6 comprises hydraulic bar 6a, sway brace 6b and toothed reaction plate 6c, described hydraulic bar 6a is connected with the high-pressure oil pipe of connecting fluid press pump 1, load box 7, hydraulic bar lower end is disc, described sway brace 6b is provided with some groups, is uniformly distributed around the lower end of described hydraulic bar 6a, one end of each sway brace 6b is hinged with the lower end of hydraulic bar 6a, the other end is corresponding is connected with a reaction plate 6c, described reaction plate 6c is circular arc, when each sway brace 6b does not open, each reaction plate 6c is closed into barrel-shaped.
Described sway brace 6b is provided with 6 groups, is that 60 ° of angles are uniformly distributed around described hydraulic bar 6a.
The utility model device carries out the method for Rock Foundation Test Under Static Pressure, comprises the steps:
1) boring is to the rock stratum need doing Rock Foundation Test Under Static Pressure, and when design experiment, control aperture, hole depth, make to meet design requirement (as being greater than 1m) into the rock degree of depth, clear hole makes sediment at the bottom of hole reach requirement, and ensures at the bottom of hole smooth;
2) wire rope is utilized to hang at the bottom of hole by the substructure be made up of hydraulic pressure support counter force system 6, load box 7, bearing plate 8, displacement silk 3 and high-pressure oil pipe, keep substructure vertical in decentralization process and be positioned at center, hole, the lower end of displacement silk 3 is connected with bearing plate 8, and the upper end of displacement silk 3 and high-pressure oil pipe extends to earth's surface;
3) equipment such as the hydraulic pump 1 of ground table top, data acquisition system (DAS) 2, pressure transducer 4, displacement transducer 10, datum line beam 5, reference stake 9 and high-pressure oil pipe are installed, hydraulic pump 1 is connected with the high-pressure oil pipe of ground table top, pressure transducer 4 is arranged on high-pressure oil pipe, datum line beam 5 is arranged on earth's surface by reference stake 9, displacement transducer 10 is arranged on datum line beam 5, and data acquisition system (DAS) 2 is connected with pressure transducer 4 and displacement transducer 10 respectively;
4) by step 2) described in substructure mention slightly, make it unsettled, open hydraulic pump 1, hydraulic bar 6a is upheld, hydraulic bar 6a drives sway brace 6b to open, judge according to pressure transducer 4 data variation, when the force value sudden change that pressure transducer 4 detects, reaction plate 6c with enter the hole wall that petrosa divides and contact, now slowly transferring wire rope makes bearing plate 8 transfer at the bottom of hole, constantly pressurizeed by hydraulic pump 1 couple of hydraulic bar 6a, the tooth on reaction plate 6c and hole wall are agreed with, reaction plate 6c and hole wall build-in;
5) upper end of displacement silk 3 is connected with displacement transducer 10 (two ends of displacement silk 3 respectively with bearing plate 8, displacement transducer 10 connects), by hydraulic pump 1, load box 7, bearing plate 8 pairs of hole bed rock base load applications, then respectively by pressure transducer 4, displacement transducer 10 detects the load of load box 7 and the displacement (displacement of bearing plate 8 is delivered to the displacement transducer 10 on earth's surface by displacement silk 3) of bearing plate 8, data acquisition system (DAS) 2 gathers the payload data of load box 7 simultaneously, the displacement data of displacement transducer 10, thus obtain the displacement deformation data of batholith under different loading condition, load-displacement (Q-S) relation curve is obtained after process.
The pressure being subject to hydraulic pump 1 as hydraulic bar 6a in described step 4) makes reaction plate 6c reach maximum reaction plate to bore hole pressure value to bore hole pressure
ptime close the hydraulic valve of hydraulic bar 6a, hydraulic pump 1 quits work.
In described step 4), maximum reaction plate is to bore hole pressure value
pmeet following formula:
NPAμ=Q/k （1）
In formula (1),
n: counter-force plate number;
a: reaction plate area;
q: maxium load value
; k: safety coefficient;
μ: reaction plate and hole wall friction factor;
By obtaining in formula (1)
n,
a,
q,
k,
μdeng design parameter, try to achieve maximum reaction plate to bore hole pressure value
p.
In described step 5), single cycle load mode is adopted to hole bed rock base load application, the first order loads gets 1/5 of test maxium load value (test maxium load value is estimated according to relevant regulations), after this every grade is 1/10 of test maxium load value, every grade of load reach relatively stable after add next stage load, until load is incremented to test maxium load value step by step.
After off-test, the releasably equipment of table top, then successively to load box 7 and hydraulic bar 6a off-load, hydraulic bar 6a retraction can pack up sway brace 6b, thus reaction plate 6c and hole wall are departed from, and then substructure is reclaimed by wire rope.
Above-describedly be only preferred embodiment of the present utility model, certainly can not limit the interest field of the utility model with this, therefore according to the equivalence change that the utility model claim is done, still belong to protection domain of the present utility model.
Claims (2)
1. a self-reaction force formula deep hole Rock Foundation Test Under Static Pressure device, it is characterized in that, comprise bearing plate (8), loading system, displacement measurement system, data acquisition system (DAS) (2) and hydraulic pressure support counter force system, described loading system is made up of load box (7), hydraulic pump (1), pressure transducer (4), described load box (7) is arranged on bearing plate (8), the top of load box (7) is connected with the hydraulic pump be arranged on earth's surface (1) by high-pressure oil pipe, and described pressure transducer (4) is arranged on high-pressure oil pipe; Described displacement measurement system is made up of datum line beam (5), reference stake (9), displacement transducer (10), displacement silk (3), described datum line beam (5) is arranged on earth's surface by reference stake (9), displacement transducer (10) is arranged on datum line beam (5), and the two ends of displacement silk (3) connect bearing plate (8) and displacement transducer (10); Described data acquisition system (DAS) (2) is connected with pressure transducer (4) and displacement transducer (10) respectively;
Described hydraulic pressure support counter force system (6) comprises hydraulic bar (6a), sway brace (6b) and toothed reaction plate (6c), described hydraulic bar (6a) and connecting fluid press pump (1), the high-pressure oil pipe of load box (7) is connected, hydraulic bar lower end is disc, described sway brace (6b) is provided with some groups, lower end around described hydraulic bar (6a) is uniformly distributed, one end of each sway brace (6b) and the lower end of hydraulic bar (6a) hinged, other end correspondence is connected with a reaction plate (6c), described reaction plate (6c) is in circular arc, when each sway brace (6b) does not open, each reaction plate (6c) is closed into barrel-shaped.
2. self-reaction force formula deep hole Rock Foundation Test Under Static Pressure device according to claim 1, it is characterized in that, described sway brace (6b) is provided with 6 groups, is uniformly distributed in 60 ° of angles around described hydraulic bar (6a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420533693.6U CN204086026U (en) | 2014-09-17 | 2014-09-17 | A kind of self-reaction force formula deep hole Rock Foundation Test Under Static Pressure device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420533693.6U CN204086026U (en) | 2014-09-17 | 2014-09-17 | A kind of self-reaction force formula deep hole Rock Foundation Test Under Static Pressure device |
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| CN204086026U true CN204086026U (en) | 2015-01-07 |
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| CN201420533693.6U Withdrawn - After Issue CN204086026U (en) | 2014-09-17 | 2014-09-17 | A kind of self-reaction force formula deep hole Rock Foundation Test Under Static Pressure device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215515A (en) * | 2014-09-17 | 2014-12-17 | 中国地质大学（武汉） | Self-counterforce type deep hole batholith load test device and test method thereof |
| CN109696360A (en) * | 2019-01-28 | 2019-04-30 | 中国地质大学（武汉） | Hydrate exploits reservoir response and production simulating sand multifunctional reaction still |
| CN113532719A (en) * | 2021-07-21 | 2021-10-22 | 长江水利委员会长江科学院 | Device and method for measuring ground stress of deep fracture zone by combined one-way hydraulic ram for drilling |
-
2014
- 2014-09-17 CN CN201420533693.6U patent/CN204086026U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215515A (en) * | 2014-09-17 | 2014-12-17 | 中国地质大学（武汉） | Self-counterforce type deep hole batholith load test device and test method thereof |
| CN109696360A (en) * | 2019-01-28 | 2019-04-30 | 中国地质大学（武汉） | Hydrate exploits reservoir response and production simulating sand multifunctional reaction still |
| CN109696360B (en) * | 2019-01-28 | 2023-10-31 | 中国地质大学（武汉） | Hydrate exploitation reservoir response and sand production simulation multifunctional reaction kettle |
| CN113532719A (en) * | 2021-07-21 | 2021-10-22 | 长江水利委员会长江科学院 | Device and method for measuring ground stress of deep fracture zone by combined one-way hydraulic ram for drilling |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150107 Effective date of abandoning: 20160622 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |