CN210002378U - rock-soil reverse static pressure test device for karst region - Google Patents
rock-soil reverse static pressure test device for karst region Download PDFInfo
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- CN210002378U CN210002378U CN201920583164.XU CN201920583164U CN210002378U CN 210002378 U CN210002378 U CN 210002378U CN 201920583164 U CN201920583164 U CN 201920583164U CN 210002378 U CN210002378 U CN 210002378U
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model discloses an karst area ground anti-static pressure test device, including counter-force crossbeam (3) through group rock stock (1) and karst area ground (12) anchor joint, be equipped with hydraulic jack (9) between counter-force crossbeam and karst area ground, hydraulic jack and karst area ground are connected, are equipped with manometer (10) on the hydraulic pump, be equipped with rigidity bearing plate (7) between hydraulic jack and the ground, the edge of rigidity bearing plate two orthogonal directions respectively is equipped with group percentage table (11), the percentage table is connected with data acquisition device (6) through data line (5), the percentage table is fixed on gauge support (4) around hydraulic jack (9).
Description
Technical Field
The utility model discloses the technique relates to karst area ground anti-static pressure test device, belongs to construction technical field.
Background
The existing foundation detection method mainly comprises static load test, static sounding, dynamic sounding, standard penetration and the like. The existing test device has the defects of complex structure, large volume, troublesome preparation work before test, high test cost and the like. Therefore, the existing foundation detection method cannot meet the actual use requirement, and particularly cannot meet the requirement of rock-soil foundation detection tests in karst regions.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide kinds of karst area ground anti-static pressure test device to avoid adopting huge counterforce device, make its device simple, prepare work labour saving and time saving, and can save experimental expense, thereby overcome the not enough of prior art.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model discloses an karst area ground anti-static pressure test device, including the counter-force crossbeam through group rock stock with karst area ground anchor joint, be equipped with hydraulic jack, hydraulic jack and hydraulic pump connection between counter-force crossbeam and karst area ground, be equipped with the manometer on the hydraulic pump, be equipped with the rigidity bearing plate between hydraulic jack and the ground, the edge of the two orthogonal directions of rigidity bearing plate respectively is equipped with group percentage table, the percentage table is connected with data acquisition device through the data line, the percentage table is fixed on hydraulic jack survey table support all around.
In the device, the rigid bearing plate is a steel plate with the diameter d =300mm and the thickness of 20 mm.
In the device, the dial indicator is a wide-range dial indicator with the accuracy of 0.01 mm.
In the foregoing apparatus, the hydraulic pump is a 300-ton hydraulic pump.
Owing to adopted above-mentioned technical scheme, the utility model discloses compare with prior art, the device of the utility model is simple structure, and is small. The preparation work before the test is time-saving and labor-saving, and the test cost can be saved. The neatness of an experimental site is not affected, the construction cost can be reduced, and the use requirement under the complex geological condition can be met.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The figures are labeled as follows: the method comprises the following steps of 1-rock anchor rod, 2-steel backing plate, 3-counterforce cross beam, 4-measuring meter support, 5-data line, 6-data acquisition device, 7-rigid bearing plate, 8-hydraulic pump, 9-hydraulic jack, 10-pressure gauge, 11-dial indicator and 12-karst area rock-soil foundation.
Detailed Description
The present invention will be described in further detail in with reference to the following drawings and examples.
The utility model discloses an karst area ground anti-static pressure test device, as shown in figure 1, including reaction beam 3 through group rock stock 1 with karst area ground 12 anchor joint, be equipped with hydraulic jack 9 between reaction beam 3 and karst area ground 12, hydraulic jack 9 is connected with hydraulic pump 8, be equipped with manometer 10 on the hydraulic pump 8, be equipped with rigidity bearing plate 7 between hydraulic jack 9 and the ground, the edge of rigidity bearing plate 7 two orthogonal directions respectively is equipped with group percentage table 11, percentage table 11 is connected with data acquisition device 6 through data line 5, percentage table 11 is fixed on gauge support 4 around hydraulic jack 9 rigid bearing plate 7 is diameter d =300mm, thickness is the round steel board of 20 mm, percentage table 11 is the precision a large amount of journey table of 0.01mm, hydraulic pump 8 is 300 ton hydraulic pump.
The test methods for performing rock-soil inverse static pressure tests in karst regions by using the device are as shown in fig. 1, the test method adopts the rigid bearing plate 7 to perform tests, pressure is applied to the rigid bearing plate 7 through the hydraulic jack 9, the settlement amount of the rigid bearing plate 7 on a rock-soil foundation 12 in the karst regions is measured, dial indicators 10 are respectively arranged on the edges of the two orthogonal directions of the rigid bearing plate 7, the dial indicators 10 are connected with the data acquisition device 6 through the data line 5 to form a measuring system for measuring the settlement amount, the arithmetic mean value of each dial indicator is taken as the basic value of the settlement amount, the hydraulic jack 9 applies pressure to the rigid bearing plate 7 to maintain the load in a grading mode by adopting a relatively stable settlement loading method, the loading can be stopped until the settlement is met with a termination condition, the load is immediately measured at intervals of 1200kPa after the stage loading is stopped, the settlement amount is measured every 10 minutes, when the settlement difference measured continuously for three times is not more than 0.01mm, the settlement is considered to be stable, the load is further considered to be met with the requirement, the settlement rate is increased within 35 , the maximum settlement rate is not increased, the load is not increased, and the settlement rate is not increased within 355636, and the load is not increased within the design requirement of the design.
Examples
The device comprises a counterforce device, a pressurizing device, a force transmission device and a measuring device, wherein the counterforce device adopts a rock anchor rod 1, the pressurizing device comprises a hydraulic jack 9, a hydraulic pump 8 and the like, the pressurizing device is calibrated indoors before testing and is loaded step by step on site according to loading standards and calibration values, the force transmission device comprises a rigid bearing plate 7, a hydraulic jack 9, a counterforce cross beam 3 and a plurality of steel backing plates 2, the steel backing plates 2 can be round or rectangular, the measuring device comprises a measuring meter bracket 4 and a dial indicator 11 with the precision of 0.01mm, the measuring meter bracket 4 can be a magnetic meter bracket, the dial indicator 11 is connected with a data acquisition device 6 through a data line 5, the dial indicator is symmetrically arranged at the edges of two orthogonal directions of the round bearing plate, the settlement values of the tables are respectively recorded during measurement, the settlement values of the tables are calculated, the arithmetic mean values of the four tables are taken as basic values of the settlement values, the settlement values of the four tables are taken as the basic settlement values of the settlement values, the arithmetic mean values of the four tables are taken as the basic settlement values of the settlement values, the settlement values of 300mm diameter d =300mm, the area of the round bearing plate is 0.07, the load of the table, the table is read, the table, the stable settlement value is taken, the settlement value is read, the settlement value is taken, the settlement value is read by a constant settlement table, the settlement table is taken, the settlement value is read by a constant settlement table, the settlement value.
Terminating the loading condition:
① the sedimentation readings are changing continuously, the sedimentation rate has an increasing trend in 24h, ② pressure is not added or added with marginal force and can not be kept stable, ③ is limited to loading capacity, the load is increased to not less than twice of the design requirement, ④ test load reaches the maximum loading capacity of the equipment.
The utility model discloses can be applied to karst area ground anti-static pressure test in super high-rise building, experimental effectual safety of guaranteeing karst area super high-rise building. The utility model discloses as shown in fig. 1, its rigidity bearing plate 7 meets with survey meter support 4, and the edge at two orthogonal directions of circular bearing plate 7 is installed to 11 symmetries of four wide range percentage tables, is connected simple structure, small through data line 5 and data acquisition device 6. Respectively recording the settlement reading values of the dial indicators 11 during the test, wherein the upper part of the rigid bearing plate 7 is provided with a hydraulic jack 9, and the upper part of the hydraulic jack 9 is provided with a counter-force beam 3; the hydraulic jack 9 is connected with a 300t hydraulic pump 8, and can be loaded by adopting a method of maintaining load and settling relatively stably in a grading manner according to a loading standard.
Claims (4)
- The karst region rock-soil inverse static pressure test device comprises a rock anchor rod (1) anchored with a karst region rock-soil foundation (12), and is characterized in that a counter-force cross beam (3) is anchored with the karst region rock-soil foundation (12) through groups of rock anchor rods (1), a hydraulic jack (9) is arranged between the counter-force cross beam (3) and the karst region rock-soil foundation (12), the hydraulic jack (9) is connected with a hydraulic pump (8), a pressure gauge (10) is arranged on the hydraulic pump (8), a rigid bearing plate (7) is arranged between the hydraulic jack (9) and the ground, groups of dial indicators (11) are respectively arranged on the edges of the rigid bearing plate (7) in two orthogonal directions, the dial indicators (11) are connected with a data acquisition device (6) through data lines (5), and the dial indicators (11) are fixed on gauge supports (4) around the hydraulic jack (9).
- 2. The karst area rock-soil reverse static pressure test device of claim 1, characterized in that: the rigid bearing plate (7) is a steel plate with the diameter d =300mm and the thickness of 20 mm.
- 3. The karst area rock-soil reverse static pressure test device of claim 1, characterized in that: the dial indicator (11) is a wide-range dial indicator with the accuracy of 0.01 mm.
- 4. The karst area rock-soil reverse static pressure test device of claim 1, characterized in that: the hydraulic pump (8) is a 300-ton hydraulic pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920583164.XU CN210002378U (en) | 2019-04-25 | 2019-04-25 | rock-soil reverse static pressure test device for karst region |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920583164.XU CN210002378U (en) | 2019-04-25 | 2019-04-25 | rock-soil reverse static pressure test device for karst region |
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| CN210002378U true CN210002378U (en) | 2020-01-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109944223A (en) * | 2019-04-25 | 2019-06-28 | 中建四局第一建筑工程有限公司 | A kind of anti-static pressure test apparatus of casta region ground and test method |
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2019
- 2019-04-25 CN CN201920583164.XU patent/CN210002378U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109944223A (en) * | 2019-04-25 | 2019-06-28 | 中建四局第一建筑工程有限公司 | A kind of anti-static pressure test apparatus of casta region ground and test method |
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