CN211877653U - Detachable pseudo-static force model test box - Google Patents
Detachable pseudo-static force model test box Download PDFInfo
- Publication number
- CN211877653U CN211877653U CN202020481034.8U CN202020481034U CN211877653U CN 211877653 U CN211877653 U CN 211877653U CN 202020481034 U CN202020481034 U CN 202020481034U CN 211877653 U CN211877653 U CN 211877653U
- Authority
- CN
- China
- Prior art keywords
- detachable
- side plate
- test box
- test
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to a detachable pseudo-static model test case, including test case main part, auxiliary system and automatic data acquisition system triplex. The test box is characterized in that the test box main body composed of the detachable front side plate, the detachable rear side plate, the detachable left side plate and the detachable right side plate has a detachable function, observation of soil body damage characteristics and quick clearing of a soil sample after a test are realized, and the problem of model box boundary effect in the test process is solved by adding flexible materials on the inner wall of the test box main body. The utility model discloses the model test of bridge foundation and soil interaction effect under the mainly used horizontal loading effect, dynamic reaction such as basic displacement, soil pressure of mainly testing bridge foundation under the reciprocal loading effect to through the connection of built-in sensor and data acquisition appearance, computer, realize the automatic monitoring and the collection of test, the function of dismantling of test box main part is favorable to the quick implementation of repetition test many times, has that test period is short, efficient, test advantage comprehensive.
Description
Technical Field
The utility model relates to an indoor model test system specifically indicates detachable pseudo-static force model test case. The dynamic reaction values (such as soil pressure, foundation displacement, foundation strain and the like) of the bridge foundation under the action of the horizontal reciprocating load can be tested, the automatic monitoring and acquisition of the dynamic reaction values of the bridge foundation model under the action of the pier top reciprocating load are realized through the connection of the sensor, the data acquisition instrument and the computer, and the observation of the bridge foundation and the damage characteristics of the surrounding soil body is realized by means of the detachable function of the system.
Background
With the development of the traffic industry in China, the proportion of the bridge in the traffic network is larger and larger, however, once the bridge engineering is damaged in an earthquake, the traffic network can be interrupted, and huge economic loss can be brought. The bridge foundation as an important component of the bridge structure bears all loads of the bridge, and the use and safety of the whole structure are greatly improved. However, previous studies have shown that: the bridge foundation has good working performance under the normal use condition, but under the action of earthquake, the reaction of the bridge in earthquake becomes more complicated due to the combined action of foundation-soil-upper structure, the phenomenon of bridge damage caused by foundation damage in earthquake is very common, a large number of reports are reported at home and abroad, the condition that the bridge foundation of Guanxi expressway is damaged due to the earthquake of Japan sakashen in 1995 is mentioned in the text of 'the influence of saka mazao earthquake on the bridge foundation' published in 'foreign road' in Hao 2001. Therefore, the research on main earthquake-resistant performance indexes such as earthquake damage mechanism, bearing capacity, skeleton curve, hysteretic characteristic, energy consumption capacity and the like of the bridge foundation-soil interaction provides theoretical basis for accurate analysis and reasonable design of the bridge foundation in the earthquake region.
The pseudo-static test is also called a low-cycle repeated load test, and refers to repeated loading and unloading of a bridge structure or a member from the positive direction and the negative direction, so as to simulate the stress characteristic and the deformation characteristic of the structure in the reciprocating vibration during the earthquake. In view of the defects of long period, high cost, inconvenient implementation, large uncertainty factor and the like of the field pseudo-static test, the indoor pseudo-static model test has a significant role in the research of the seismic performance of the bridge foundation. Bridge pseudo-static tests taking into account the foundations then require a mold box system in order to simulate the bridge foundation-soil interaction system.
At present, a model box system for carrying out an indoor pseudo-static test of a bridge foundation mainly comprises two types, namely a geotechnical model groove and a geotechnical model box. The geotechnical model groove is usually positioned below the ground, and is formed by excavating a rectangular or square foundation pit on the ground of a laboratory and then pouring concrete on the side wall and the bottom of the foundation pit. The geotechnical model box is made of steel and other metal materials, has smaller size compared with an geotechnical model groove, is convenient to operate and move, is suitable for laboratories with smaller sites, and has obvious size effect caused by the device. The two devices have the advantages and the disadvantages respectively, but the two devices have the common disadvantages, including the fact that the deformation of the foundation in the soil cannot be effectively tested in the test process; and the damage phenomenon of the foundation and the surrounding soil body in the depth direction after the test cannot be observed; meanwhile, the equipment cannot be disassembled, so that great difficulty is brought to digging and removing of the soil body and dismantling of the model after the test, the test is more inconvenient in a multi-group continuity comparison model test, the test period is prolonged, the labor input is increased, and the test cost is increased. Therefore, the utility model relates to a can effectively test bridge foundation warp, easily experimental back model destruction phenomenon observe and the soil body clears away fast, and can improve the model box system of the continuous model test efficiency of multiunit, have very important meaning to deepening destruction mechanism and the anti-seismic performance of bridge foundation under the earthquake action.
Disclosure of Invention
For solving the defect that current pseudo-static test model case exists and not enough to realize among the bridge basis pseudo-static test that basic deformation test, experimental back destroy observation, the quick clear away of the soil body and the demolising of model, the utility model aims at providing detachable pseudo-static model test case. The system can not only realize the observation of the damage phenomenon of the foundation and the surrounding soil body after the test, but also realize the quick removal of the soil body after the test and the model dismantling. Meanwhile, the sensors in the soil sample can dynamically monitor variables such as soil pressure, foundation displacement and the like, and the automatic acquisition and storage of data are realized by connecting a data acquisition instrument and a computer.
The utility model adopts the technical proposal that:
the detachable pseudo-static model test box comprises a test box main body, an auxiliary system and an automatic data acquisition system. The test box main body comprises a test box bottom plate (1), a base open slot (2), base reinforcing angle steel (3), a detachable front side plate (4), a detachable rear side plate (5), a detachable left side plate (6), a detachable right side plate (7) and a connecting bolt (8). The test box is characterized in that a test box bottom plate (1) is connected with a base open slot (2) provided with reinforcing angle steel (3) in a welding mode, a detachable front side plate (4), a detachable rear side plate (5), a detachable left side plate (6) and a detachable right side plate (7) are inserted into the base open slot (2), bending sections are arranged at two ends of the detachable left side plate (6) and the detachable right side plate (7), and a test box main body is formed by connecting bolts (8) at two ends, the detachable front side plate (4) and the detachable rear side plate (5) together. And loosening the connecting bolt (8) and pulling out the detachable front side plate (4), the detachable rear side plate (5), the detachable left side plate (6) and the detachable right side plate (7) from the base open slot (2), so that the test box can be detached. The auxiliary system comprises a lateral plate diagonal brace (9) of a test box bottom plate, a diagonal brace baffle plate (10) and a flexible material (11), and is characterized in that the top of the lateral plate diagonal brace (9) is connected with a detachable front lateral plate (4) and a detachable rear lateral plate (5) through bolts (8), the bottom of the lateral plate diagonal brace (9) is connected with the diagonal brace baffle plate (10) through bolts (8), the diagonal brace baffle plate (10) is welded on the test box bottom plate (1), the lateral plate diagonal brace (9) can enhance the rigidity and the stability of the detachable front lateral plate (4) and the detachable rear lateral plate (5), and the flexible material (11) is arranged on the inner wall of the lateral plate of the test box and used for reducing the boundary effect of the test box. The automatic data acquisition system consists of a soil pressure gauge (12), a lead auxiliary hole (13), a PVC pipe (14), a displacement meter stay wire (15), a displacement meter support bottom plate (16), a displacement meter support upright post (17), a stay-wire type displacement meter (18), a sensor lead wire (19), a data acquisition instrument (20) and a computer (21), and is characterized in that the soil pressure gauge (12) is fixed on the side surface of a bridge foundation (22), the sensor lead wire (19) is led out through the lead auxiliary hole (13) on the detachable front side plate (4), one end of the displacement meter stay wire (15) is fixed on the side surface of the bridge foundation (22), the other end of the displacement meter stay wire is led out of the detachable front side plate (4) through the PVC pipe (14) and is connected to the stay-wire type displacement meter (18) fixed on the displacement meter support upright post (17), the displacement meter support upright post (17) is welded, after the sensor lead (19) is connected with the data acquisition instrument (20), the automatic data acquisition and storage are realized through the computer (21), and an automatic data acquisition system is formed together.
The utility model discloses an advantage is with the beneficial effect who produces:
1. the utility model overcomes the unable shortcoming of dismantling of conventional bridge basis pseudo-static test groove and proof box, through the dismantlement of proof box curb plate bring very big convenience for cleaing away fast and demolising of model of experimental back soil body, and then shorten test cycle, reduce test cost is favorable to the multiunit continuous test of repetition.
2. The utility model overcomes conventional bridge basis pseudostatic force geotechnical model groove and geotechnical model case can't effectively test the shortcoming of basic displacement, through the accurate survey of the basic displacement in the stay-supported displacement meter realization test process.
3. The utility model discloses the inside rigid boundary effect that sets up flexible material of experimental box can effectively reduce in the model test process.
4. The utility model discloses can realize the observation to experimental back basis and surrounding soil body destruction phenomenon after the curb plate is demolishd, provide the most audio-visual data for theoretical analysis.
5. The utility model discloses pass through being connected of data acquisition instrument and computer with all kinds of sensors, realized the automation of whole test process, improved test efficiency.
Drawings
FIG. 1 is a top view of the present invention;
FIG. 2 is a structural elevation view of the present invention;
fig. 3 is an elevation view of the present invention;
fig. 4 is an appearance side view of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1-4, the detachable pseudo-static model test box comprises a test box main body, an auxiliary system and an automatic data acquisition system. The test box main body comprises a test box bottom plate (1), a base open slot (2), base reinforcing angle steel (3), a detachable front side plate (4), a detachable rear side plate (5), a detachable left side plate (6), a detachable right side plate (7) and a connecting bolt (8). The test box is characterized in that a test box bottom plate (1) is connected with a base open slot (2) provided with reinforcing angle steel (3) in a welding mode, the height of the base open slot (2) is not larger than 30cm, a detachable front side plate (4), a detachable rear side plate (5), a detachable left side plate (6), a detachable right side plate (7) is inserted into the base open slot (2), bending sections are arranged at two ends of the detachable left side plate (6) and the detachable right side plate (7), a test box main body is formed by connecting bolts (8) at two ends, the detachable front side plate (4) and the detachable rear side plate (5) together, the number of the connecting bolts (8) is determined according to the height of the test box, and the interval cannot exceed 50cm for ensuring the integral effect. And loosening the connecting bolt (8) and pulling out the detachable front side plate (4), the detachable rear side plate (5), the detachable left side plate (6) and the detachable right side plate (7) from the base open slot (2), so that the test box can be detached. The auxiliary system is composed of a lateral plate inclined strut (9) of a bottom plate of the test box, an inclined strut baffle plate (10) and a flexible material (11), and is characterized in that the top of the lateral plate inclined strut (9) is connected with a detachable front lateral plate (4) and a detachable rear lateral plate (5) through bolts (8), the bottom of the lateral plate inclined strut (9) is connected with the inclined strut baffle plate (10) through bolts (8), the inclined strut baffle plate (10) is welded on the bottom plate (1) of the test box, the lateral plate inclined strut (9) is used for enhancing the rigidity and stability of the detachable front lateral plate (4) and the detachable rear lateral plate (5), the flexible material (11) is arranged on the inner wall of the lateral plate of the test box, a polyethylene foam plate and a rock wool plate are adopted, the thickness is 10-20cm, and. The automatic data acquisition system consists of a soil pressure gauge (12), a lead auxiliary hole (13), a PVC pipe (14), a displacement meter stay wire (15), a displacement meter support bottom plate (16), a displacement meter support upright post (17), a stay-type displacement meter (18), a sensor lead (19), a data acquisition instrument (20) and a computer (21), and is characterized in that the soil pressure gauge (12) is fixed on the side surface of a bridge foundation (22), the sensor lead (19) is led out through the lead auxiliary hole (13) on a detachable front side plate (4), one end of the displacement meter stay wire (15) is fixed on the side surface of the bridge foundation (22), the other end of the displacement meter stay wire is led out of the detachable front side plate (4) through the PVC pipe (14), the PVC pipe has the function of eliminating the influence of soil body friction on the displacement precision and improving the test precision, the other end after being led out is connected to the stay-type displacement meter (18), the displacement meter support upright post (17) is welded on a displacement meter support bottom plate (16), and after a sensor lead (19) is connected with a data acquisition instrument (20), automatic data acquisition and storage are realized through a computer (21), so that an automatic data acquisition system is formed together.
Claims (4)
1. The detachable pseudo-static model test box comprises a test box main body, an auxiliary system and an automatic data acquisition system, wherein the test box main body comprises a test box bottom plate (1), a base open slot (2), base reinforcing angle steel (3), a detachable front side plate (4), a detachable rear side plate (5), a detachable left side plate (6), a detachable right side plate (7) and a connecting bolt (8); the auxiliary system comprises an inclined strut (9) of a side plate of the bottom plate of the test box, an inclined strut baffle plate (10) and a flexible material (11); the automatic data acquisition system comprises a soil pressure gauge (12), a lead auxiliary hole (13), a PVC pipe (14), a displacement meter stay wire (15), a displacement meter support bottom plate (16), a displacement meter support upright post (17), a stay wire type displacement meter (18), a sensor lead (19), a data acquisition instrument (20) and a computer (21); the test box is characterized in that a test box bottom plate (1) is connected with a base open slot (2) provided with a reinforcing angle steel (3) in a welding mode, the height of the base open slot (2) is 30cm, a detachable front side plate (4), a detachable rear side plate (5), a detachable left side plate (6) and a detachable right side plate (7) are inserted into the base open slot (2), and bending sections are arranged at two ends of the detachable left side plate (6) and the detachable right side plate (7), so that a test box main body is formed by connecting bolts (8) at two ends, the detachable front side plate (4) and the detachable rear side plate (5) together; the top of a side plate inclined strut (9) is connected with a detachable front side plate (4) and a detachable rear side plate (5) through bolts (8), the bottom of the side plate inclined strut (9) is connected with an inclined strut baffle plate (10) through bolts (8), the inclined strut baffle plate (10) is welded on a bottom plate (1) of a test box, the side plate inclined strut (9) is used for enhancing the rigidity and stability of the detachable front side plate (4) and the detachable rear side plate (5), and a flexible material (11) is arranged on the inner wall of the side plate of the test box; be fixed in bridge basis (22) side with soil pressure gauge (12), and draw sensor lead wire (19) through lead wire auxiliary hole (13) that is located on detachable preceding curb plate (4) and draw forth, displacement meter stay wire (15) one end is fixed in bridge basis (22) side, detachable preceding curb plate (4) are drawn forth through PVC pipe (14) to the other end, the stay-supported displacement meter (18) that are fixed in on displacement meter support stand (17) are received to the other end after drawing forth, displacement meter support stand (17) welding is on displacement meter support bottom plate (16), sensor lead wire (19) link to each other the back with data acquisition appearance (20), reconnection computer (21) have constituteed automatic data acquisition system jointly.
2. The detachable pseudo-static model test box according to claim 1, wherein the flexible material (11) is closely attached to the inner walls of the detachable front side plate (4), the detachable rear side plate (5), the detachable left side plate (6) and the detachable right side plate (7) of the test box body, and the flexible material (11) adopts a polyethylene foam plate and a rock wool plate.
3. The detachable pseudo-static model test box according to claim 1, wherein the detachable front side plate (4), the detachable rear side plate (5), the detachable left side plate (6) and the detachable right side plate (7) are pulled out from the base open slot (2) by loosening the connecting bolts (8), so that the function of detaching the test box main body is realized.
4. The detachable pseudo-static model test box according to claim 1, characterized in that the test of the foundation displacement in the soil is realized by a stay wire type displacement meter (18), and a PVC pipe (14) is arranged in the soil to protect the stay wire (15) of the displacement meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020481034.8U CN211877653U (en) | 2020-04-05 | 2020-04-05 | Detachable pseudo-static force model test box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020481034.8U CN211877653U (en) | 2020-04-05 | 2020-04-05 | Detachable pseudo-static force model test box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211877653U true CN211877653U (en) | 2020-11-06 |
Family
ID=73251775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020481034.8U Expired - Fee Related CN211877653U (en) | 2020-04-05 | 2020-04-05 | Detachable pseudo-static force model test box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211877653U (en) |
-
2020
- 2020-04-05 CN CN202020481034.8U patent/CN211877653U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203606232U (en) | Pressing, bending and twisting composite stress member loading device | |
| CN101832993B (en) | Semi-module test box for dynamic compaction reinforced foundation model test | |
| CN104374648A (en) | Test device and test method for testing kinetic shear characteristics between pipe piles and grouting soil bodies | |
| CN206832583U (en) | It is a kind of to be used for the experimental rig of anchor pole stretching and shearing in jointed rock mass | |
| CN104328810B (en) | Prefabricated tubular pile single pile foundation bearing capacity detection improvement method | |
| CN110398429B (en) | Steel pipe concrete anti-seismic performance test device and test method considering influence of construction process | |
| CN106337446B (en) | A kind of pile foundation resistance to plucking laboratory testing rig and its experimental method | |
| CN203164057U (en) | Test device for multidirectional loading of side slope in geotechnical engineering | |
| CN111351725A (en) | A mold box system for bridge foundation and soil interaction pseudo-static test | |
| CN211877653U (en) | Detachable pseudo-static force model test box | |
| CN103758161A (en) | Pressure test device and method for prestressed pipe pile through peripheral pipe pile in component force measuring mode | |
| CN108316317A (en) | A kind of concrete filled steel tube arch perfusion simulator | |
| CN101892679A (en) | Test device for simulating washing and bearing coupled characteristic of underwater pile foundation | |
| CN207017322U (en) | One kind is used for pile for prestressed pipe resistance to plucking static-load testing device | |
| CN107460862B (en) | Combined testing device for substrate bearing capacity and frictional resistance | |
| CN212391189U (en) | Be used for reinforced concrete pier anti-seismic performance loading device | |
| CN203594057U (en) | Detecting device for vertical extraction-resistant static test of single pile through buttress method | |
| CN215330069U (en) | Tubular pile compression test device | |
| CN206607613U (en) | A kind of bored concrete pile displacement acquisition device | |
| CN111912711B (en) | Comprehensive model groove system for structure quasi-static test | |
| CN210395467U (en) | Novel single-pile pulling-resistant static load test device | |
| CN208899547U (en) | It is a kind of for test mixing girder stayed-cable bridge steel-pipe pile rack bearing power reaction frame | |
| CN108225894B (en) | Counter-force support for anchor rod drawing test and use method | |
| CN203569600U (en) | Pile bottom bedrock load test device | |
| CN107059952A (en) | A kind of steel-pipe pile horizontal cyclic experimental provision of simulated waves load |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201106 Termination date: 20210405 |