CN106193133A - A kind of slope section bridge pile foundation three-dimensional stress model assay device - Google Patents
A kind of slope section bridge pile foundation three-dimensional stress model assay device Download PDFInfo
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- CN106193133A CN106193133A CN201610451784.9A CN201610451784A CN106193133A CN 106193133 A CN106193133 A CN 106193133A CN 201610451784 A CN201610451784 A CN 201610451784A CN 106193133 A CN106193133 A CN 106193133A
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- slope
- steel pipe
- pile foundation
- rotary shaft
- frame
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
Abstract
The present invention relates to model test apparatus technical field, particularly relate to a kind of slope section bridge pile foundation three-dimensional stress model assay device.This model test apparatus includes casing, horizontal load measurement apparatus, vertical load measurement apparatus and grade of side slope measurement apparatus；Described horizontal load measurement apparatus includes that some vertical steel pipes, described vertical steel pipe upper end are provided with A-frame；Described grade of side slope measurement apparatus includes rotating screw rod, rotary shaft, one-tenth slope template and cambered way, one end of described rotation screw rod is connected through described cambered way with described rotary shaft, and the other end of described rotation screw rod is provided with the locking nut positioning described rotation screw motion position；Described rotation screw rod moves along described cambered way, drives described rotary shaft to rotate, and described rotary shaft drives described one-tenth slope template to rotate.This model test apparatus has simple in construction, becomes slope efficiency high, and test accuracy and efficiency are high, and functional reliability is strong, and using effect is good, it is simple to the advantage promoted the use of.
Description
Technical field
The present invention relates to model test apparatus technical field, particularly relate to a kind of slope section bridge pile foundation three-dimensional stress model
Assay device.
Background technology
Hydrogeologic condition and geographical position residing for the slope section bridge pile foundation of mountain area are complicated and changeable, and on level land
Bridge pile foundation is compared, and its stress and deformation characteristic are increasingly complex, therefore the necessary bearing mechanism to slope bridge pile foundation and being subject to
Power and deformation characteristic launch to go deep into systematic research.Existing theoretical research, how by the three of slope section this complexity of bridge pile foundation
Dimension problem, the plane problem being simplified to two dimension is analyzed and studies, therefore with slope section bridge pile foundation in Practical Project
There is a big difference for load situation, thus brings potential safety hazard can to the design and construction of Practical Project.Therefore, by indoor model
The problem in terms of the carrying of sloping area bridge pile foundation and deformation is studied in test, it is possible to more true reasonably reaction slope and stake
The three-dimensional interactions of base.
The most conventional geotechnical model test means mainly include indoor conventional model test and centrifugal model test.
Wherein, centrifugal model test can reappear the stress field of prototype with less model, but is disadvantageous in that soil particle size is imitated
And consuming should be tested bigger.Additionally, due to moulded dimension is less, the type selecting of measuring instrument, arrange and bury underground the most relatively difficult.
At present, indoor conventional model test is that the one studying slope bridge pile foundation stress, deformation and stability conscientiously may be used
The important research means of row.But existing conventional model assay device can only apply the horizontal loading of single direction, and load
Equipment is fixedly installed, therefore there is larger difference compared with the load situation of Practical Project pile foundation, has bright on load mode
Aobvious limitation.And existing model test apparatus is when carrying out slope measuring, become slope mould the most accordingly, and Cheng Po
Angle can not arbitrarily adjust, thus can not efficiently control the gradient of model side slope, thus brings to the making of model side slope
Inconvenience.
Summary of the invention
(1) to solve the technical problem that
It is an object of the invention to provide a kind of slope section bridge pile foundation three-dimensional stress model assay device, solve existing test
Device horizontal loading load mode is single, it is impossible to the effectively problem of Controlling model grade of side slope.
(2) technical scheme
In order to solve above-mentioned technical problem, the invention provides a kind of slope section bridge pile foundation three-dimensional stress model test dress
Putting, the horizontal load measurement apparatus, vertical load measurement apparatus and the grade of side slope that including casing, are arranged on described casing are surveyed
Amount device；
Wherein said horizontal load measurement apparatus includes some vertical steel pipes, and the upper end of described vertical steel pipe is provided with can
Endoporus along described vertical steel pipe moves up and down with level to the A-frame rotated；
Described grade of side slope measurement apparatus includes rotating the rotary shaft that is connected with described rotation screw rod of screw rod and described turn
Moving axis some one-tenth slope templates connected vertically and cambered way, one end of wherein said rotation screw rod passes described cambered way
Being connected with described rotary shaft, the other end of described rotation screw rod is provided with the locking nut positioning described rotation screw motion position；
Described rotation screw rod moves along described cambered way, drives described rotary shaft to rotate, and described rotary shaft drives described one-tenth slope template
Rotate.
Further, described vertical load measurement apparatus includes reaction frame, is arranged on the test pile below described reaction frame
And jack, one end of described jack is connected with described reaction frame, the other end of described jack and described test pile phase
Even.
Specifically, between described jack and described test pile, it is provided with backing plate, described jack is additionally provided with first
Force transducer.
Further, described horizontal load measurement apparatus also includes pulley, steel wire rope and loading counterweight, wherein said pulley
Being arranged on described A-frame, one end of described steel wire rope is connected with described test pile, and the other end of described steel wire rope passes
Described pulley is connected with described loading counterweight, is additionally provided with the second force transducer on described steel wire rope.
Specifically, described casing is the rectangular structure of upper opening, and described casing is by supporting steel frame and is arranged on institute
State the glass baffle plate composition of supporting steel frame surrounding.
Further, described vertical steel pipe includes the first vertical steel pipe, the second vertical steel pipe and the 3rd vertical steel pipe, wherein
Described the first vertical steel pipe, the second vertical steel pipe and the 3rd vertical steel pipe are separately positioned on three sidewalls that described casing is adjacent
On.
Specifically, the two ends of described vertical steel pipe are connected with described supporting steel frame by connection assembly respectively, described connection
Assembly includes buckle and connecting bolt, and wherein said buckle is by holding section and the connecting portion group that is arranged on two ends, described holding section
Becoming, described vertical steel pipe is arranged between described holding section and described supporting steel frame, described supporting steel frame and described connecting portion it
Between by described connecting bolt be connected.
Specifically, the curved angle of described cambered way is 90 °, the two ends of described cambered way respectively with described supporting steel
Frame is connected.
Specifically, the supporting steel frame of described box bottom is provided with the through hole suitable with described rotary shaft, described rotation
The two ends of axle are each passed through described through hole and stretch out outside described supporting steel frame.
Specifically, described A-frame is positioned with described vertical steel pipe by keeper, and described keeper is location
Bolt.
(3) beneficial effect
The technique scheme of the present invention has the advantage that
The slope section bridge pile foundation three-dimensional stress model assay device that the present invention provides, by adjusting described rotation screw rod edge
Described cambered way moves, and drives described rotary shaft to rotate, and then the one-tenth slope template that band is automatically connected in described rotary shaft rotates,
The model side slope of different angles can be formed, can be according to the ramp slope that will simulate during test needed for, adjust described rotation screw rod
Control into the slope gradient, thus improve test accuracy and efficiency；The triangle being arranged on described vertical steel pipe upper end by adjustment is propped up
Frame moves up and down the test pile adapting to differing heights in the endoporus of described vertical steel pipe, exists by adjusting A-frame
The endoporus of described vertical steel pipe carries out level to rotation to adapt to the horizontal force of different directions.The present invention has simple in construction and closes
Reason, diverse in function, become slope efficiency high, test accuracy and efficiency are high, and functional reliability is strong, and using effect is good, it is simple to promote the use of
Advantage.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present invention slope section bridge pile foundation three-dimensional stress model assay device；
Fig. 2 be embodiment of the present invention slope section bridge pile foundation three-dimensional stress model assay device Fig. 1 in amplify signal at A
Figure；
Fig. 3 is that embodiment of the present invention grade of side slope controls schematic diagram；
Fig. 4 be embodiment of the present invention slope section bridge pile foundation three-dimensional stress model assay device Fig. 1 in amplify signal at B
Figure；
Fig. 5 be embodiment of the present invention slope section bridge pile foundation three-dimensional stress model assay device Fig. 1 in amplify signal at C
Figure；
Fig. 6 is the structural representation of the further embodiment of slope section bridge pile foundation three-dimensional stress model assay device of the present invention
Figure.
In figure: 1: supporting steel frame；2: vertical steel pipe；3: A-frame；4: connect assembly；5: rotate screw rod；6: rotary shaft；
7: become slope template；8: cambered way；9: locking nut；10: reaction frame；11: test pile；12: jack；13: pulley；14: steel
Cord；15: load counterweight；16: backing plate；201: the first vertical steel pipes；202: the second vertical steel pipes；203: the three vertical steel pipes；
401: buckle；402: connecting bolt.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained on the premise of not making creative work, broadly falls into the scope of protection of the invention.
As Figure 1-5, the slope section bridge pile foundation three-dimensional stress model assay device that the embodiment of the present invention provides, including
Casing, the horizontal load measurement apparatus being arranged on described casing, vertical load measurement apparatus and grade of side slope measurement apparatus.
Described horizontal load measurement apparatus includes some vertical steel pipes 2, and the upper end of described vertical steel pipe 2 is provided with can edge
The endoporus of described vertical steel pipe 2 moves up and down with level to the A-frame 3 rotated.During use, by adjusting described three
Angle support 3 moves up and down the test pile adapting to differing heights in the endoporus of described vertical steel pipe 2, by adjusting triangle
Support 3 carries out level to rotation to adapt to the horizontal force of different directions in the endoporus of described vertical steel pipe 2, easy to operate, carries
Precision that high horizontal load is measured and efficiency.
Described grade of side slope measurement apparatus includes rotating the rotary shaft 6 that is connected with described rotation screw rod 5 of screw rod 5 with described
Rotary shaft 6 some one-tenth slopes connected vertically template 7 and cambered way 8, one end of wherein said rotation screw rod 5 passes described arc
Shape slideway 8 is connected with described rotary shaft 6, and the other end of described rotation screw rod 5 is provided with and positions described rotation screw motion position
Locking nut 9.During use, adjusting described rotation screw rod 5 and move along described cambered way 8, the most described rotation screw rod 5 drives described
Rotary shaft 6 rotates, and described rotary shaft 6 drives described one-tenth slope template 7 to rotate, thus realizes controlling into the purpose of the slope gradient.At this
The curved angle of cambered way 8 described in embodiment is set to 90 °, by adjust described rotation screw rod 5 position can be formed 0～
The model side slope of 90 °, substantially increases precision and efficiency that grade of side slope is measured.
Furthermore, it is understood that described vertical load measurement apparatus includes reaction frame 10, is arranged on below described reaction frame 10
Test pile 11 and jack 12, one end of described jack 12 is connected with described reaction frame 10, another of described jack 12
End is connected with described test pile 11.It is provided with backing plate 16, at described jack between described jack 12 and described test pile 11
The first force transducer it is additionally provided with on 12.In use, control by described jack 12 and apply vertical load, by described
The vertical load size of applying every time measured by first force transducer.
Furthermore, it is understood that described horizontal load measurement apparatus also includes pulley 13, steel wire rope 14 and loads counterweight 15, wherein
Described pulley 13 is arranged on described A-frame 3, and one end of described steel wire rope 14 is connected with described test pile 11, described steel wire
The other end of rope 14 is connected through described pulley 13 with described loading counterweight 15, and second power that is additionally provided with on described steel wire rope 15 passes
Sensor.In use, apply different pile foundation level loads by applying the different counterweights that loads, passed by described second power
Sensor measures the horizontal loading size of applying every time.
Wherein, described pulley 13 is adjustable to be movably arranged on described A-frame 3, and described pulley 13 can be relative to
Described A-frame 3 to 360 ° of rotations, when needing the horizontal force measuring different directions, can regulate described pulley 13 in level
Angle, it is consistent with needing the horizontal force direction measured to make the direction of described pulley 13, and then ensures to measure different directions water
Accuracy during flat power.
Specifically, described casing is the rectangular structure of upper opening, and described casing is by supporting steel frame 1 and is arranged on
The glass baffle plate composition of described supporting steel frame 1 surrounding.Wherein said supporting steel frame 1 uses connecting method to be attached, by thoroughly
Bright glass baffle plate, it is possible to very intuitively clearly observe taxi body and the situation of change of model foundation pile in casing, structure letter
Single, and dismantle and install very convenient.
Specifically, described cambered way 8 is made up of two arcs be arrangeding in parallel, is formed sliding between two arcs
Road, for limiting the sliding trace of described rotation screw rod 5, the two ends of described cambered way 8 are respectively by bolt and described support
Steelframe 1 is connected.
Specifically, the two ends up and down of described vertical steel pipe 2 are connected with described supporting steel frame 1 by connection assembly 4 respectively,
Described connection assembly 4 includes buckle 401 and connecting bolt 402, and wherein said buckle 401 is by holding section and is arranged on described card
The connecting portion composition at two ends, conjunction portion, described vertical steel pipe 2 is arranged between described holding section and described supporting steel frame 1, described
It is connected by described connecting bolt 402 between support steelframe 1 and described connecting portion.
Specifically, the supporting steel frame of described box bottom is provided with the through hole suitable with described rotary shaft 6, described turn
The two ends of moving axis 6 are each passed through described through hole and stretch out the outside of described supporting steel frame 1.Described rotary shaft 6 is provided with described
Rotating the through hole that screw rod 5 is suitable, one end of described rotation screw rod 5 is connected with described rotary shaft 6, when described through described through hole
When rotation screw rod 5 moves, described rotary shaft 6 can be driven to rotate.
Specifically, described A-frame 3 carries out locking positioning, described location by keeper and described vertical steel pipe 2
Part can use bolt.When needing lifting position or the rotational angle adjusting described A-frame 3, unclamp described location spiral shell
Bolt can be adjusted, and when position is fixed, only need to be locked by described bolt, easy to operate.
Specifically, in process of the test, Controlling model side slope can be carried out by the quantity adjusting described one-tenth slope template 7
Highly, and described one-tenth slope template 7 is detachably arranged in described rotary shaft 6, loads and unloads very convenient, and dismantles described one-tenth completely
After slope template 7, this model test apparatus i.e. can be changed into the model test apparatus on non-analog slope.
As shown in Figure 6, in further embodiment of the present invention, described vertical steel pipe include the first vertical steel pipe 201,
Two vertical steel pipe 202 and the 3rd vertical steel pipes 203, first wherein said vertical steel pipe the 201, second vertical steel pipe 202 and
Three vertical steel pipes 203 are separately positioned on three sidewalls that described casing is adjacent, at the first described vertical steel pipe 201, second
Vertical steel pipe 202 and the 3rd vertical steel pipe 203 are respectively mounted an A-frame, are formed in the horizontal load of three different directions
Measurement apparatus.In use, can at first vertical steel pipe the 201, second vertical steel pipe 202 and the 3rd vertical steel pipe 203 successively
Test, expand horizontal load further and measure direction and scope.
Certainly, the horizontal load direction applied as required, can each sidewall in the three of described casing sidewall
On be respectively provided with multiple vertical steel pipe, such that it is able to the horizontal loading applied on horizontal plane on 0～180 ° of any direction, thus pole
The earth improves test accuracy and test efficiency.
In sum, the embodiment of the present invention provide slope section bridge pile foundation three-dimensional stress model assay device, have as
Lower advantage:
1, by the horizontal load measurement apparatus being arranged on described casing, vertical load measurement apparatus and grade of side slope
Measurement apparatus realizes the model test operation of three-dimensional carrying condition lower stress, deformation and stability, simple in construction, modern design
Rationally, diverse in function.
2, the present invention controls into the slope gradient by adjusting rotation screw rod, needed for the ramp slope that will simulate, and can
Form the model side slope of 0 °～90 °, be greatly enhanced test accuracy and efficiency.
3, the present invention is by the fit system between A-frame and vertical steel pipe, by adjusting the upper bottom of A-frame
Put the test pile adapting to differing heights；By adjusting the horizontal plane anglec of rotation of A-frame, and then adapt to different directions
Horizontal force.
4, the present invention also has certainty of measurement and efficiency is high, and functional reliability is strong, low cost, and using effect is good, uses the longevity
Life is long, it is simple to the advantage promoted the use of.
In describing the invention, it should be noted that except as otherwise noted, " multiple " be meant that two or two with
On；Term " on ", D score, "left", "right", " interior ", the orientation of the instruction such as " outward " or position relationship be based on side shown in the drawings
Position or position relationship, be for only for ease of and describe the present invention and simplify description rather than instruction or the device of hint indication or unit
Part must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.This
Outward, term " first ", " second ", " the 3rd " etc. are only used for describing purpose, and it is not intended that indicate or hint relative importance.
In describing the invention, in addition it is also necessary to explanation, unless otherwise clearly defined and limited, term " install ",
" be connected ", " connection " should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or connect integratedly
Connect；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary.Right
For those of ordinary skill in the art, visual concrete condition understands above-mentioned term concrete meaning in the present invention.
Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit；Although
With reference to previous embodiment, the present invention is described in detail, it will be understood by those within the art that: it still may be used
So that the technical scheme described in foregoing embodiments to be modified, or wherein portion of techniques feature is carried out equivalent；
And these amendment or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (10)
1. a slope section bridge pile foundation three-dimensional stress model assay device, it is characterised in that: include casing, be arranged on described case
Horizontal load measurement apparatus, vertical load measurement apparatus and grade of side slope measurement apparatus in body；
Wherein said horizontal load measurement apparatus includes that some vertical steel pipes, the upper end of described vertical steel pipe are provided with can be along institute
The endoporus stating vertical steel pipe moves up and down with level to the A-frame rotated；
Described grade of side slope measurement apparatus includes rotating rotary shaft and the described rotary shaft that screw rod is connected with described rotation screw rod
Some one-tenth slope templates connected vertically and cambered way, one end of wherein said rotation screw rod passes described cambered way and institute
Stating rotary shaft to be connected, the other end of described rotation screw rod is provided with the locking nut positioning described rotation screw motion position；Described
Rotating screw rod to move along described cambered way, drive described rotary shaft to rotate, described rotary shaft drives described one-tenth slope template to rotate.
Slope section bridge pile foundation three-dimensional stress model assay device the most according to claim 1, it is characterised in that: described perpendicular
Include reaction frame to load-measuring device, be arranged on the test pile below described reaction frame and jack, described jack
One end is connected with described reaction frame, and the other end of described jack is connected with described test pile.
Slope section bridge pile foundation three-dimensional stress model assay device the most according to claim 2, it is characterised in that: described
It is provided with backing plate between jack and described test pile, described jack is additionally provided with the first force transducer.
Slope section bridge pile foundation three-dimensional stress model assay device the most according to claim 2, it is characterised in that: described water
Flat load-measuring device also includes pulley, steel wire rope and loading counterweight, and wherein said pulley is arranged on described A-frame, institute
The one end stating steel wire rope is connected with described test pile, and the other end of described steel wire rope passes described pulley and described loading counterweight phase
Even, described steel wire rope is additionally provided with the second force transducer.
Slope section bridge pile foundation three-dimensional stress model assay device the most according to claim 1, it is characterised in that: described case
Body is the rectangular structure of upper opening, described casing by supporting steel frame and be arranged on described supporting steel frame surrounding glass gear
Plate forms.
Slope section bridge pile foundation three-dimensional stress model assay device the most according to claim 5, it is characterised in that: described perpendicular
The first vertical steel pipe, the second vertical steel pipe and the 3rd vertical steel pipe is included, wherein said the first vertical steel pipe, second to steel pipe
Vertical steel pipe and the 3rd vertical steel pipe are separately positioned on three sidewalls of described casing.
Slope section bridge pile foundation three-dimensional stress model assay device the most according to claim 5, it is characterised in that: described perpendicular
Being connected with described supporting steel frame by connection assembly respectively to the two ends of steel pipe, described connection assembly includes buckle and connects spiral shell
Bolt, wherein said buckle is by holding section and is arranged on the connecting portion at two ends, described holding section and forms, and described vertical steel pipe is arranged
Between described holding section and described supporting steel frame, by described connecting bolt phase between described supporting steel frame with described connecting portion
Even.
Slope section bridge pile foundation three-dimensional stress model assay device the most according to claim 5, it is characterised in that: described arc
The curved angle of shape slideway is 90 °, and the two ends of described cambered way are connected with described supporting steel frame respectively.
Slope section bridge pile foundation three-dimensional stress model assay device the most according to claim 5, it is characterised in that: described case
Supporting steel frame bottom body is provided with the through hole suitable with described rotary shaft, and the two ends of described rotary shaft are each passed through described logical
Hole is stretched out outside described supporting steel frame.
Slope section bridge pile foundation three-dimensional stress model assay device the most according to claim 1, it is characterised in that: described
A-frame is positioned with described vertical steel pipe by keeper, and described keeper is bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610451784.9A CN106193133B (en) | 2016-06-21 | 2016-06-21 | A kind of slope section bridge pile foundation three-dimensional stress model experimental rig |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610451784.9A CN106193133B (en) | 2016-06-21 | 2016-06-21 | A kind of slope section bridge pile foundation three-dimensional stress model experimental rig |
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| Publication Number | Publication Date |
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| CN106193133A true CN106193133A (en) | 2016-12-07 |
| CN106193133B CN106193133B (en) | 2019-01-22 |
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| CN201610451784.9A Expired - Fee Related CN106193133B (en) | 2016-06-21 | 2016-06-21 | A kind of slope section bridge pile foundation three-dimensional stress model experimental rig |
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| CN107014670A (en) * | 2017-04-28 | 2017-08-04 | 浙江科技学院 | The test device of the multidirectional horizontal bearing capacity of single pile under compound load action |
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| CN107255701A (en) * | 2017-07-07 | 2017-10-17 | 石家庄铁道大学 | Pile-anchor retaining model assay systems for In A Crushed Rock Slope engineering |
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| CN108593420A (en) * | 2018-04-12 | 2018-09-28 | 东南大学 | It is a kind of can three-dimensional load physical test model casing and its application method |
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| CN108563887A (en) * | 2018-04-23 | 2018-09-21 | 北京智交慧桥科技有限公司 | A kind of intelligent analysis system of Test on Bridge Loading |
| CN110827655A (en) * | 2018-11-27 | 2020-02-21 | 合肥工业大学 | Test loading device of assembled structure model |
| CN109403396A (en) * | 2018-12-24 | 2019-03-01 | 西安建筑科技大学 | A kind of pile foundation model test combines loading device and method with above pulling out with horizontal |
| CN109403396B (en) * | 2018-12-24 | 2024-03-12 | 西安建筑科技大学 | Horizontal and upward pulling combined loading device and method for pile foundation model test |
| CN110185074A (en) * | 2019-06-26 | 2019-08-30 | 金陵科技学院 | A kind of taper pile model test apparatus and test method |
| CN110185074B (en) * | 2019-06-26 | 2023-10-20 | 金陵科技学院 | Inclined pile model test device and test method |
| CN110439043A (en) * | 2019-08-21 | 2019-11-12 | 广西瑞宇建筑科技有限公司 | It is a kind of can multidirectional load swelled ground pile foundation experimental provision |
| CN113252455A (en) * | 2021-04-01 | 2021-08-13 | 宁波和邦检测研究有限公司 | Water loading tank, and stair performance detection system and method applying water loading tank |
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