CN204098089U - A kind of retaining wall buckling form experimental rig - Google Patents
A kind of retaining wall buckling form experimental rig Download PDFInfo
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- CN204098089U CN204098089U CN201420506576.0U CN201420506576U CN204098089U CN 204098089 U CN204098089 U CN 204098089U CN 201420506576 U CN201420506576 U CN 201420506576U CN 204098089 U CN204098089 U CN 204098089U
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- retaining wall
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- buckling form
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Abstract
The utility model discloses a kind of retaining wall buckling form experimental rig, comprise the chassis for keeping off soil, for simulating the breast boards of the plane strain state of roadbed longitudinal direction and the retaining wall for loading, chassis is provided with two coupled and breast boardss be parallel to each other, and the end formed at two breast boardss is provided with a pair opposed cantilever retaining wall I and retaining wall II; Retaining wall I is provided with retaining wall tumbler, and retaining wall II is provided with retaining wall sedimentation device; Gap is had between the bottom of retaining wall II and chassis; Retaining wall tumbler and retaining wall sedimentation device are provided with the checkout gear for detecting soil pressure and displacement.The utility model is tested by retaining wall buckling form, can be used for the soil pressure under the different unstability operating mode of research retaining wall and change in displacement rule.This device retaining wall unstability that can be applicable under multiple wire feeding and different tops load is tested, research.
Description
Technical field
The utility model relates to highway construction, railway engineering, Geotechnical Engineering field, particularly relates to a kind of retaining wall buckling form device and test method.
Background technology
Retaining wall can play the effect of alternative high slope, Economization on land, uses increasingly extensive in highway, railway construction and maintenance and reinforcement.In recent years, cantilever retaining wall and anchor retaining wall many employings steel concrete panel, because of it, to have floor space little, the feature that operating limit height is high and receiving much concern.But light-type block wall exists potential multiple mode of failure in Long-Time Service process, mainly contain retaining wall around main its instability forms such as base plate rotation, retaining wall sedimentation and anchor pole inefficacies.The research of retaining wall unstability belongs to wprks Journal of Sex Research, cannot carry out in Practical Project.Retaining wall, once unstability, easily causes serious accident.Research in current Practical Project rests on the analysis of causes after retaining wall unstability more, still has device and the test method that can carry out system research to retaining wall Instability mechanism.Model testing can carry out independent control to the principal element in retaining wall, safer relative to field trial easy.Also there is no corresponding experimental rig and test method at present.
Utility model content
The utility model, in order to solve prior art above shortcomings, provides a kind of retaining wall buckling form experimental rig and test method; Rotational angle and the speed of retaining wall can be adjusted arbitrarily by this device, retaining wall settling amount can be controlled, adopt water tank preloading to simulate the different depth of fill, be applicable to study light-type block wall stress under different instability condition, displacement and rockbolt stress test.The utility model is easy to processing, and installation, convenient disassembly, can reuse, safety is high.
The technical solution adopted in the utility model is as follows:
A kind of retaining wall buckling form experimental rig, comprise the chassis for keeping off soil, for simulating the breast boards of the plane strain state of roadbed longitudinal direction and the retaining wall for loading, it is characterized in that: on described chassis, be provided with two coupled and breast boardss be parallel to each other, the end formed at two breast boardss is provided with a pair opposed cantilever retaining wall I and retaining wall II; Retaining wall I is provided with retaining wall tumbler, and retaining wall II is provided with retaining wall sedimentation device; Gap is had between the bottom of retaining wall II and chassis; Described retaining wall tumbler and retaining wall sedimentation device are provided with the checkout gear for detecting soil pressure and displacement.
Described retaining wall I comprises the retaining wall riser I and retaining wall base plate I that are connected by rotating shaft, and retaining wall riser I and retaining wall base plate I can rotate under the driving of retaining wall tumbler; Described retaining wall II comprises connected retaining wall riser II retaining wall base plate II; Retaining wall base plate II is connected with chassis and has gap between the two.
Described chassis adopts Q235 Plate Welding to make, and chassis covers organic glass, for simulating plain concrete basis.
Described breast boards becomes an entirety by multiple steelframe by bolt anchoring, is covered with the lateral deformation of one deck organic glass restriction filler, for simulating the plane strain state of roadbed longitudinal direction inside breast boards.
Described breast boards is connected with chassis by bolt.
Described retaining wall tumbler also comprises a rotating shaft, oil cylinder and oil cylinder counter force wall; Rotating shaft is connected with shaft base by rotating shaft bush frame, and shaft base is connected with chassis; Rotating shaft and retaining wall adopt bolt anchoring as a whole by rotating shaft connector; Oil cylinder one end by bolt be fixed on the oil cylinder connector rotated on retaining wall riser I and be connected; The oil cylinder other end is connected with the oil cylinder connector be fixed on oil cylinder counter force wall by bolt; Oil cylinder counter force wall divides into channel-section steel, and being connected with chassis by bolt is an entirety; Oil cylinder send oil and oil return to be controlled by controller.
Described retaining wall sedimentation device also comprises two studs; Connected by stud between sedimentation retaining wall base plate II and chassis; By controlling the upper and lower nut location on stud, retaining wall base plate and base is made to have the space of 10cm height.
Described Monitoring on Earth Pressure device comprises the earth pressure cell being vertically embedded in retaining walls back, to measure soil pressure.
Described system for monitoring displacement comprises dial gage, to monitor the lateral displacement of retaining wall.
A kind of test method of retaining wall buckling form experimental rig is as follows:
Step 1) breast boards is installed
Connect into as a whole by breast boards by crab-bolt and chassis, it is as a whole that breast boards and organic glass adopt double faced adhesive tape to be connected; Top, chassis adopts on double faced adhesive tape covers one deck organic glass;
Step 2) mounting block cob wall rotation system
Channel-section steel, oil cylinder counter force wall are installed.Connect oil cylinder and oil cylinder counter force wall, mount controller; Employing row hangs or crane carries out the installation of rotation retaining wall; Bolt is adopted to be connected with retaining wall by connector; Connect oil cylinder and retaining wall riser.
Step 3) mounting block cob wall sedimenting system
The downside of stud is connected with chassis by nut; Employing row hangs or crane carries out the installation of sedimentation retaining wall; Nut is adopted to be connected on the upside of stud with left side retaining wall.
Step 4) Roadbed Soil and compacting
Backfill carries out compacting according to designing requirement; All need to measure degree of compaction after every layer of backfill compacting, continue compacting after not reaching standard until up to standard;
Step 5) earth pressure cell is installed
Earth pressure cell is buried underground and is adopted anti-digging mode to install, and namely the depth of fill is counter after exceeding earth pressure cell position 20cm excavates, and is put into by pressure cell and backfill compacting;
Step 6) water tank preloading
Design load is converted into height of water level, and banketing, surface uniform lays water tank, and carries out water filling, reaches design load to make top load.
The test method of retaining wall buckling form experimental rig, comprises retaining wall and rotates unstability test and the test of retaining wall sedimentation unstability;
It is as follows that described retaining wall rotates unstability test:
Keep the spacing on sedimentation retaining wall and chassis constant; Control oil cylinder oil inlet and oil return by controller, make rotation retaining wall in axis or outwards rotate arbitrarily angled, under measuring different rotational angle, rotating retaining wall lateral earth pressure Changing Pattern;
Described retaining wall sedimentation unstability test is as follows:
Control oil cylinder, keep rotation retaining wall riser vertically motionless; Apart from chassis 0m outside sedimentation retaining wall, 0.2m, 0.4m, 0.6m, 0.8m At The Height installs dial gage; Regulate stud upper nut, make sedimentation retaining wall move down any distance, measure the distribution of different settling amount sinking downshift cob wall lateral earth pressure and change in displacement rule.
The beneficial effects of the utility model:
(1) bolt support form, wire feeding, top load can be adjusted, be applicable to the retaining wall unstability research under different operating mode.
(2) retaining wall differential settlement amount can be controlled, measure the retaining wall displacement under retaining wall differential settlement instability condition, soil pressure and anchor axial force Changing Pattern.
(3) retaining wall rotational angle can be controlled, measure the retaining wall displacement under retaining wall rotation instability condition, soil pressure and anchor axial force Changing Pattern.
(4) slack of anchor pole can be controlled.Measure retaining wall anchor pole to relax retaining wall displacement under instability condition, soil pressure and anchor axial force Changing Pattern.
(5) adopt water tank with water preloading, can ensure that top load is evenly distributed load.
(6) mould processing is convenient, is easy to dismounting and carrying, can reuses.
Accompanying drawing explanation
Fig. 1 is the total schematic diagram of the utility model model structure;
Fig. 2 is breast boards and chassis structure schematic diagram
Fig. 3 is rotation system structural representation;
Fig. 4 is sedimenting system structural representation;
In figure, 1-oil cylinder counter force wall, 2-oil cylinder connector I, 3-oil cylinder, 4-oil cylinder connector II, 5-rotating shaft connector, 6-rotating shaft bush frame, 7-shaft base, 8-rotates retaining wall riser I, 9-rotates retaining wall base plate I, 10-rotating shaft, 11-chassis, 12-breast boards, 13-sedimentation retaining wall riser II, 14-sedimentation retaining wall base plate II, 15-stud, 16-channel-section steel.
Detailed description of the invention
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of retaining wall buckling form experimental rig, comprises chassis 11, breast boards 12, cantilever retaining wall, retaining wall rotation system, retaining wall sedimenting system and monitoring system.
Chassis 11 adopts the Q235 steel plate of staggered welding to make, and chassis 11 is covered with one deck organic glass, for keeping off soil.Breast boards 12 becomes an entirety by multiple steelframe by bolt anchoring, is covered with one deck organic glass inside breast boards 12, for keeping off soil.Breast boards 12 is connected with chassis 11 by bolt.
Cantilever retaining wall is made up of sedimentation retaining wall and rotation retaining wall.Sedimentation retaining wall is made up of sedimentation retaining wall riser 13 and sedimentation retaining wall base plate 14.
Rotate retaining wall to form by rotating retaining wall riser 8 and rotating retaining wall base plate 9.The retaining wall riser of two retaining walls is all as a whole by being welded to connect into base plate.Rotate retaining wall and be provided with retaining wall rotation system.Sedimentation retaining wall is provided with retaining wall sedimenting system.
Retaining wall rotation system forms by rotating the rotating shaft 10 of retaining wall base plate 9 both sides, oil cylinder 3 and oil cylinder counter force wall 1.Rotating shaft 10 is connected with shaft base 7 by rotating shaft bush frame 6, and shaft base 7 is connected by crab-bolt with chassis 11.Rotating shaft 10 adopts bolt anchoring as a whole with rotation retaining wall by rotating shaft connector 5.Oil cylinder 3 one end by bolt be fixed on the oil cylinder connector 4 rotated on retaining wall riser 8 and be connected.Oil cylinder 3 other end is connected with the oil cylinder connector 2 be fixed on oil cylinder counter force wall 1 by bolt.Oil cylinder counter force wall 1 divides into channel-section steel 16, and being connected with chassis 11 by bolt is an entirety.Oil cylinder send oil and oil return to be controlled by controller.
Described retaining wall sedimenting system forms primarily of stud 15.Sedimentation retaining wall base plate 14 and chassis 11 are provided with some bolts hole, connect with stud 15.By controlling the nut location up and down on stud 15, retaining wall base plate and base is made to have the space of 10cm height.
Described monitoring system comprises and Monitoring on Earth Pressure device and displacement monitor.
Described Monitoring on Earth Pressure device comprises the earth pressure cell being vertically embedded in retaining walls back, to measure soil pressure.Described system for monitoring displacement comprises dial gage, to monitor the lateral displacement of retaining wall.
Here is modelling of the present utility model and concrete two concrete test methods:
One, retaining wall buckling form makes
1) breast boards is installed
Breast boards is connected into as a whole by crab-bolt and chassis.Chassis overall length 2.0m, wide 1.0m, the long 2.0m of breast boards, high 0.8m.It is as a whole that breast boards and organic glass adopt double faced adhesive tape to be connected.Top, chassis adopts on double faced adhesive tape covers one deck organic glass.
2) mounting block cob wall rotation system
3) mounting block cob wall sedimenting system
4) Roadbed Soil and compacting
Backfill carries out compacting according to the degree of compaction of 90%.All need to measure degree of compaction after every layer of backfill compacting, continue compacting after not reaching standard until up to standard.
5) earth pressure cell is installed
Earth pressure cell is buried underground and is adopted anti-digging mode to install, and namely the depth of fill is counter after exceeding earth pressure cell position 20cm excavates, and is put into by pressure cell and backfill compacting.In the left and right sides, retaining walls back all installs earth pressure cell, and earth pressure cell is highly respectively 0m, 0.2m, 0.4m, 0.6m, 0.8m apart from burying underground of organic glass on chassis.
6) water tank preloading
Design load is converted into height of water level 1.0m, banketing, surface uniform lays water tank, and carries out being filled to water level 1.0m place.
Two, test method, enumerates two concrete test methods in the utility model.
Embodiment 1
(1) model is installed.Filler adopts sand, and controlling degree of compaction is 90%, height of water level 1.0m
(2) adopt portable frequency meter to read and rotate retaining wall lateral earth pressure box original frequency.
(3) spacing on sedimentation retaining wall and chassis remains unchanged.Control oil cylinder oil return by controller, make right side retaining wall rotate 5 ゜ around axially outer
(4) adopt portable frequency meter to read and rotate retaining wall lateral earth pressure box frequency, and be converted to soil pressure, analyze lateral earth pressure change during retaining wall flare.
(5) by controlling oil cylinder oil return, making rotation retaining wall be respectively 10 ゜, 15 ゜, 20 ゜ around axial outer rotational angle, repeating step (4), under studying different rotational angle, the lateral earth pressure change of retaining wall.
Embodiment 2
(1) model is installed.Filler adopts silt, and controlling degree of compaction is 85%, height of water level 1.5m
(2) adopt portable frequency meter to read and rotate retaining wall lateral earth pressure box original frequency.
(3) control oil cylinder, keep rotation retaining wall riser vertically motionless.Apart from chassis 0m outside sedimentation retaining wall, 0.2m, 0.4m, 0.6m, 0.8m At The Height installs dial gage, and reads initial reading.
(4) stud upper nut is screwed down, makes sedimentation retaining wall move down 5cm.
(5) adopt portable frequency meter to read sedimentation side block cob wall lateral earth pressure box frequency, and be converted to soil pressure, analyze lateral earth pressure change during retaining wall flare.Read dial gage reading, analyze retaining wall lateral displacement change.
(6) regulating stud upper nut, making sedimentation retaining wall around moving 7cm respectively, 10cm downwards, 13cm, repeat step (4), (5), under studying different settling amount, the lateral earth pressure change of retaining wall and lateral displacement change.
This device height of water level, wire feeding, degree of compaction etc. all can adjust, and other, with reference to embodiment 1, do not repeat them here.
The application subsidizes by state natural sciences fund (51208284), Shandong Province's development in science and technology plan (2013GSF11603).
By reference to the accompanying drawings the detailed description of the invention of utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.
Claims (8)
1. a retaining wall buckling form experimental rig, comprise chassis, retaining wall and the breast boards for the plane strain state of simulating roadbed longitudinal direction, it is characterized in that: on described chassis, be provided with two coupled and breast boardss be parallel to each other, the end formed at two breast boardss is provided with a pair opposed cantilever retaining wall I and retaining wall II; Retaining wall I is provided with retaining wall tumbler, and retaining wall II is provided with retaining wall sedimentation device; Gap is had between the bottom of retaining wall II and chassis; And the monitoring device be provided with on described retaining wall tumbler and retaining wall sedimentation device for detecting soil pressure and displacement.
2. retaining wall buckling form experimental rig as claimed in claim 1, it is characterized in that: described retaining wall I comprises the retaining wall riser I and retaining wall base plate I that are connected by rotating shaft, and retaining wall riser I and retaining wall base plate I can rotate under the driving of retaining wall tumbler; Described retaining wall II comprises connected retaining wall riser II retaining wall base plate II; Retaining wall base plate II is connected with chassis and has gap between the two.
3. retaining wall buckling form experimental rig as claimed in claim 1, is characterized in that: described chassis adopts Q235 Plate Welding to make, and chassis is coated with the organic glass for keeping off soil.
4. retaining wall buckling form experimental rig as claimed in claim 1, is characterized in that: described breast boards becomes an entirety by multiple steelframe by bolt anchoring; The organic glass of the lateral deformation of one deck restriction filler is covered with inside breast boards.
5. retaining wall buckling form experimental rig as claimed in claim 2, is characterized in that: described retaining wall tumbler comprises a rotating shaft, oil cylinder and oil cylinder counter force wall; Rotating shaft is connected with shaft base by rotating shaft bush frame, and shaft base is connected with chassis; Rotating shaft and retaining wall I adopt bolt anchoring as a whole by rotating shaft connector; Oil cylinder one end be fixed on the oil cylinder connector rotated on retaining wall riser I and be connected; The oil cylinder other end is connected with the oil cylinder connector be fixed on oil cylinder counter force wall; Oil cylinder counter force wall divide into channel-section steel and channel-section steel to be connected with chassis be one overall; Described oil cylinder is controlled by controller.
6. retaining wall buckling form experimental rig as claimed in claim 2, is characterized in that: described retaining wall sedimentation device comprises two studs; Connected by stud between sedimentation retaining wall base plate II and chassis and by controlling the upper and lower nut location on stud, make retaining wall base plate and base have space.
7. retaining wall buckling form experimental rig as claimed in claim 1, is characterized in that: described Monitoring on Earth Pressure device comprises the earth pressure cell being vertically embedded in retaining walls back.
8. retaining wall buckling form experimental rig as claimed in claim 1, is characterized in that: described displacement monitor comprises the dial gage of the lateral displacement of monitoring retaining wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420506576.0U CN204098089U (en) | 2014-09-03 | 2014-09-03 | A kind of retaining wall buckling form experimental rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420506576.0U CN204098089U (en) | 2014-09-03 | 2014-09-03 | A kind of retaining wall buckling form experimental rig |
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| Publication Number | Publication Date |
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| CN204098089U true CN204098089U (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420506576.0U Withdrawn - After Issue CN204098089U (en) | 2014-09-03 | 2014-09-03 | A kind of retaining wall buckling form experimental rig |
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| CN (1) | CN204098089U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196064A (en) * | 2014-09-03 | 2014-12-10 | 山东大学 | Retaining wall instability model test device and installation and test method |
| CN109085320A (en) * | 2018-07-13 | 2018-12-25 | 武汉科技大学 | A kind of multi-functional retaining wall model test apparatus |
-
2014
- 2014-09-03 CN CN201420506576.0U patent/CN204098089U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196064A (en) * | 2014-09-03 | 2014-12-10 | 山东大学 | Retaining wall instability model test device and installation and test method |
| CN104196064B (en) * | 2014-09-03 | 2016-01-20 | 山东大学 | A kind of retaining wall buckling form experimental rig and installation, test method |
| CN109085320A (en) * | 2018-07-13 | 2018-12-25 | 武汉科技大学 | A kind of multi-functional retaining wall model test apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150114 Effective date of abandoning: 20160120 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |