CN116625813A - Soil pressure testing device and implementation method - Google Patents
Soil pressure testing device and implementation method Download PDFInfo
- Publication number
- CN116625813A CN116625813A CN202310317689.XA CN202310317689A CN116625813A CN 116625813 A CN116625813 A CN 116625813A CN 202310317689 A CN202310317689 A CN 202310317689A CN 116625813 A CN116625813 A CN 116625813A
- Authority
- CN
- China
- Prior art keywords
- soil
- plate
- baffle
- test block
- plates
- 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.)
- Pending
Links
- 239000002689 soil Substances 0.000 title claims abstract description 145
- 238000012360 testing method Methods 0.000 title claims abstract description 139
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000008569 process Effects 0.000 claims description 12
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention belongs to the technical field of soil pressure testing in geotechnical engineering, and discloses a soil pressure testing device which comprises an operation frame, a loading plate, a horizontal counter-force support and a soil test block baffle. The soil pressure measuring device is simple in structure and convenient to operate, and soil pressure is measured more reliably by considering soil side limit conditions. The invention also provides an implementation method of the soil pressure test.
Description
Technical Field
The invention belongs to the technical field of soil pressure testing in geotechnical engineering, and particularly relates to a soil pressure testing device and an implementation method.
Background
In the fields of geotechnical mechanics and engineering, the size and distribution of soil pressure load are important to study. The soil pressure is one of main loads acting on the supporting structure, and determining the size and the distribution shape of the soil pressure has important significance for the safety, the optimal design and the like of the supporting structure. Classical coulomb or Rankine soil pressure calculation theory is always adopted for engineering due to simple calculation and clear mechanical concept, but satisfactory results are not easy to obtain due to the complexity of geotechnical engineering, so that model tests and field tests are an indispensable main research method in the field.
Meanwhile, the compression consolidation experiment of soil in the indoor experiment is usually carried out under the condition of complete lateral limitation or no lateral limitation, the lateral limitation condition of soil body in situ surrounding soil cannot be well reflected, the measured soil body parameter and undisturbed soil have large gap, and the method cannot be directly used for design calculation.
Disclosure of Invention
In order to solve the problems, the invention provides a soil pressure testing device, which can replace the soil side pressure calculated by the side pressure calculation theory of the traditional soil by simulating the side limit condition of the periphery of undisturbed soil. The invention also provides an implementation method of the soil pressure test.
In order to achieve the above purpose, the invention adopts the following technical scheme:
in a first technical scheme, the soil pressure testing device comprises an operation frame, a loading device, a horizontal counter-force support and a soil test block baffle, wherein
The operation frame comprises a baffle moving surface with a planar and smooth top surface, and cross beams are arranged on two sides of the operation frame in a first direction;
the front surface of the soil test block baffle main body is provided with two semi-cylindrical plates which are cut along the axial direction, the main bodies of the two semi-cylindrical structures can be spliced to form a cylindrical structure, a cavity in the cylindrical structure is used for placing a soil test block, the two semi-cylindrical plates are placed on the moving surface of the baffle, the back surface of the semi-cylindrical plate is provided with a vertical baffle which is vertically arranged and is vertical to the first direction, and four guide mounting holes are formed in the baffles at the two sides;
the horizontal counter-force support comprises two lateral limit adjusting plates, a plurality of nuts, four screws and eight springs, wherein the middle section of each screw is a light section, each screw is inserted into a guide mounting hole, the eight springs are sleeved outside the four screws, each lateral limit adjusting plate is provided with a light hole, each lateral limit adjusting plate is sleeved on each screw through each light hole, the two lateral limit adjusting plates are respectively positioned on two sides of the two semi-cylindrical plates, the first ends of the springs are abutted against the outer side surfaces of the vertical baffle plates, the second ends of the springs are abutted against the inner side surfaces of the lateral limit adjusting plates, and the nuts are connected onto the screws through threads and are abutted against the outer sides of the lateral limit adjusting plates;
the combined body of the horizontal counter-force support and the soil test block baffle is placed on the operation frame, the soil test block baffle is placed on the moving surface of the baffle, and the horizontal counter-force support is connected to the cross beam through a screw.
In the first aspect, preferably, the inner wall of the semi-cylindrical plate has a pressure sensor for measuring a pressure value applied to the inner wall of the semi-cylindrical plate by the soil test block during loading performed by the loading device.
In the first technical scheme, as an optimization, a dial indicator is arranged on the cross beam, a test end of the dial indicator is abutted to the outer side face of the vertical baffle, and the dial indicator is used for measuring the displacement distance of the vertical baffle in the horizontal direction.
In the first aspect, preferably, a rib for reinforcing the strength of the semi-cylindrical plate is provided at a junction transition of the semi-cylindrical plate and the vertical baffle.
In the first technical aspect, preferably, a spring limiting ring for positioning the spring is provided on the inner side of the lateral limiting adjusting plate and/or on the outer side of the vertical baffle plate.
In a first aspect, preferably, the loading device is a loading plate, and the loading plate includes a guide plate and a plate-shaped loading plate;
the operation frame comprises a bottom plate and upright posts positioned at four corners of the top surface of the bottom plate, through holes are formed in the four corners of the guide plate, the guide plate is arranged on the upright posts through the through holes and can vertically slide along the upright posts, the load plate is fixedly connected to the bottom surface of the guide plate, the load plate corresponds to the open end of the top of the tubular structure, and the shape and the area of the load plate are consistent with those of the open end of the top of the tubular structure.
In the first technical scheme, preferably, the moving surface of the baffle is a high-fiber ceramic plate, and the soil test block round baffle is a plate body made of polytetrafluoroethylene materials.
In a first aspect, preferably, the size of the internal cavity of the tubular structure is: d=100 mm, h=200 mm.
In a second technical aspect, a method for implementing a soil pressure test, using the soil pressure test device as described in the first technical aspect, includes the steps of:
s1, manufacturing a soil test block: immediately after the soil sample is taken on site, the soil sample is made into a standard soil test block. The size and the dimension are as follows: d=100mm, h=200mm, the disturbance to the soil test block is avoided in the manufacturing process; the collected sample accords with the related regulations of JTG E40-2007 chapter 4 of the Highway geotechnical test regulations; the preparation process of the soil sample is in accordance with the 16 th to 3 rd regulations of the geotechnical test method standard GB/T50123-1999;
s2, debugging and checking the instrument: before the test, checking whether each sensor can be used normally or not, ensuring that the whole test process can work normally, cleaning the moving surface of the soil test block baffle and the screw 9, removing foreign matters smoothly, and smearing a lubricant to reduce friction;
s3, soil placing test blocks. Removing the loading plate, removing the soil test block baffle, and placing the soil test block at a designated position; resetting the baffle, adjusting the position of the lateral limit adjusting plate to enable the spring to be in a free stretching state initially, not extruding the soil test block baffle, placing the measuring end of the dial indicator on the lateral surface and resetting;
s4, load is applied: the loading plate is placed on the vertical rod of the operation frame, load is applied above the guide plate, the load is loaded to the semicircular baffle plates of the two soil test blocks, the displacement is stable, then the load is unloaded, the soil pressure value on the pressure sensor is recorded through the computer in the process, and the maximum reading of the dial indicator is recorded.
S5, side limit adjustment: the position of the lateral limit adjusting plate is adjusted to enable the spring to generate different initial lateral forces, the steps S1-S4 are repeated, and the load is applied to read the value of the pressure sensor and the soil side displacement value on the dial indicator until the test data are complete;
s6, unloading the loader after the test is finished, recovering the initial positions of the instruments, and cleaning the inner side of the baffle plate of the soil test block and the moving surface of the baffle plate so as to facilitate the next test.
The beneficial effects are that:
the test device can laterally move to provide support in the test process of the soil test block baffle plate through the setting of the horizontal counter-force support, and the lateral limit condition of the periphery of undisturbed soil is simulated through the acting force exerted by the spring, so that the performance test of the soil test block is more close to the real state, meanwhile, the change of the form of the soil test block in the test process can be tested through the installed pressure sensor and the dial indicator in the test process, and the measured soil pressure replaces the soil lateral pressure calculated by the lateral pressure calculation theory of the traditional soil. The device has simple and easy-to-use integral structure, is suitable for repeated test and measurement, is free of maintenance in the later period, and has low manufacturing cost.
Drawings
FIG. 1 is a schematic overall axial view of the soil pressure testing device of the present invention.
Fig. 2 is a front view of the soil pressure testing device of the present invention.
FIG. 3 is a schematic view of an operation frame in the soil pressure testing device of the present invention.
FIG. 4 is a schematic view of a load plate in the soil pressure testing device of the present invention.
Fig. 5 is a schematic view of a horizontal counterforce support in the soil pressure testing device of the present invention.
FIG. 6 is a schematic view of a soil block baffle in the soil pressure testing device of the present invention.
The reference numerals include:
in the figure: the device comprises a 1-operation frame, a 2-loading plate, a 3-horizontal counterforce support, a 4-soil test block baffle, a 5-baffle moving surface, a 6-dial indicator, a 7-guide plate, an 8-loading plate, a 9-screw, a 10-nut, an 11-side limit adjusting plate, a 12-spring, a 13-spring limit ring, a 14-semi-cylindrical plate, a 15-vertical baffle, a 16-rib plate and a 17-pressure sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present technical solution more apparent, the present technical solution is further described in detail below in conjunction with the specific embodiments. It should be understood that the description is only illustrative and is not intended to limit the scope of the present technical solution.
Example 1
As shown in fig. 1-6, the present embodiment provides a soil pressure testing device, which comprises an operation frame 1, a loading device, a horizontal counterforce support 3 and a soil test block baffle 4, wherein
The operation frame 1 comprises a baffle moving surface 5 with a planar and smooth top surface, and the operation frame 1 is provided with cross beams at two sides in the first direction;
the front surface of the main body of the soil test block baffle 4 is provided with two semi-cylindrical plates 14 which are cut along the axial direction, the main bodies of the two semi-cylindrical structures can be spliced to form a cylindrical structure, a cavity in the cylindrical structure is used for placing the soil test block, the two semi-cylindrical plates 14 are placed on the baffle moving surface 5, the back surface of the semi-cylindrical plate 14 is provided with a vertical baffle 15 which is vertically arranged and is vertical to the first direction, and four guide mounting holes are formed in the baffles at the two sides;
the horizontal counter-force support 3 comprises two lateral limit adjusting plates 11, a plurality of nuts 10, four screws 9 and eight springs 12, wherein the middle section of each screw 9 is a light section, each screw 9 is inserted into a guide mounting hole, the eight springs 12 are sleeved outside the corresponding four screws 9, each lateral limit adjusting plate 11 is provided with a light hole, each lateral limit adjusting plate 11 is sleeved on each screw 9 through the corresponding light hole, the two lateral limit adjusting plates 11 are respectively positioned on two sides of two semi-cylindrical plates 14, the first ends of the springs 12 are abutted against the outer side surfaces of the vertical baffle plates 15, the second ends of the springs 12 are abutted against the inner side surfaces of the lateral limit adjusting plates 11, and the nuts 10 are connected onto the corresponding screws 9 through threads and are abutted against the outer sides of the lateral limit adjusting plates 11;
the assembly of horizontal counter-force support 3 and soil test block baffle 4 is placed on handling frame 1, and soil test block baffle 4 is placed in baffle movable surface 5, and horizontal counter-force support 3 passes through screw rod 9 to be connected at the crossbeam.
Specifically, as shown in fig. 1, the operation frame 1 is an integral support of the device, the soil test block baffle 4 is a fixing device for loading the soil test block, and the horizontal counter-force support 3 supports the opposite-phase acting force of the opposite pressure of the horizontal direction on the expansion of the soil test block baffle 4 in the test loading process.
As shown in fig. 2, the bottom of the operation frame 1 is provided with a bottom plate, the top surface of the bottom is a baffle moving surface 5, and the top surface of the baffle moving surface 5 is a smooth horizontal surface, so that the soil test block baffle 4 is prevented from generating larger friction force when the top surface of the soil test block baffle moves. Referring to fig. 1, in the operation frame 1, four corners of the top surface of the bottom plate are provided with columns, which are cylinders, and function to guide the loading plate 2. The loading plate 2 comprises a guide plate 7 which is connected to the operating frame 1 through a column guide, and the lower part of the guide plate 7 is connected with a loading plate 8 through a rod-shaped structure which is fixedly connected and can not retract.
The loading plate 2, the horizontal counter-force support 3 and the soil test block baffle 4 are connected with each other through the operation frame 1, the operation frame 1 is a frame structure consisting of a vertical rod, a cross beam and a bottom plate, a smooth plane baffle moving surface 5 is bonded on the bottom plate, and the dial indicator 6 is arranged on the right cross beam; the loading plate 2 comprises a guide plate 7 and a loading plate; the four corners of the guide plate 7 are provided with vertical holes, and the guide plate can slide up and down on the upright posts of the operation frame 1; the load plate is vertically connected with the guide plate 7; the main body of the horizontal counter-force support 3 is four symmetrically arranged screw rods 9, the screw rods penetrate through the soil test block semicircular retaining plate front and back, two sides of the screw rods are connected to the cross beam of the operation frame 1 through nuts 10, lateral limit adjusting plates 11 and springs 12 are symmetrically arranged on the inner side of the operation frame 1, and spring limiting rings 13 are connected to the inner side of the lateral limit adjusting plates 11; the soil test block baffle 4 is composed of two mutually meshed semi-cylindrical plates 14, a vertical baffle 15 is arranged on the outer side of the soil test block baffle, the semi-cylindrical plates 14 and the vertical baffle 15 are connected into a whole, three rib plates 16 are arranged between the two semi-cylindrical plates, grooves are formed in the inner sides of the semi-cylindrical plates 14 and are provided with pressure sensors 17, the side surfaces of the vertical baffle 15 are through holes of the horizontal counter-force support 3, spring limiting rings 13 are connected around the holes, and the soil test block baffle is integrally placed on a baffle moving surface 5 on the bottom plate of the operation frame 1.
As shown in fig. 3, the operation frame 1 is provided with two cross beams between two left side upright posts and two right side upright posts, the cross beams are provided with through holes horizontally arranged, the through holes are used for penetrating through the screw rods 9, and one cross beam is provided with the dial indicator 6. The baffle moving surface 5 is a high-fiber ceramic plate with the thickness of 5mm, and the surface is smooth and is adhered to the sub-bottom plate of the operation frame 1; the dial indicator 6 is arranged on the sub-beam of the operating frame 1, and the measuring end is placed on the side surface of the soil test block baffle 4 during measurement to measure the displacement of the baffle.
As shown in fig. 4, four corners of the guide plate 7 are provided with through holes, the guide plate 7 is mounted on the upright post through the through holes and can vertically slide along the upright post, the load plate 8 is fixedly connected to the bottom surface of the guide plate 7, the load plate 8 corresponds to the open end of the top of the tubular structure, and the shape and the area of the load plate 8 are consistent with those of the open end of the top of the tubular structure. The loading plate 2 comprises a guide plate 7 and a loading plate, the thickness of the loading plate is 5mm and 10mm respectively, and the guide plate 7 can slide up and down on the vertical rod of the operation frame 1; the load plate is vertically connected with the guide plate 7, and the size of the load plate is consistent with the size of the circular cylinder opening of the soil test block baffle 4 in the occlusion state.
As shown in fig. 5, in the horizontal reaction force brace 3, the lateral limit adjusting plate 11 is provided with an outer support of the spring 12, the spring 12 is provided to abut against an outer side surface of the vertical baffle 15, and is used to apply a support force in a horizontal direction to the vertical baffle 15, and in a free state at an initial stage of the test, when the loading plate 2 presses down the test soil, the vertical baffle 15 tends to move outward, and the spring 12 abuts against the vertical baffle 15, thereby applying a lateral support force to the vertical baffle 15. In addition, 16 nuts 10 are arranged on the screw 9, wherein four nuts 10 are arranged on one side of the inner side, 8 nuts 10 are arranged on two sides of the inner side, the nuts 10 are screwed with the screw 9 through threads, and the effect of the nuts is to position the horizontal position of the lateral limit adjusting plate 11, so that the lateral limit adjusting plate 11 is prevented from moving laterally in the test process. The outer eight nuts 10 function to position the horizontal counter-force strut 3 on the operating frame 1.
The main body of the horizontal counter-force support 3 is four symmetrically arranged screw rods 9, the screw rods penetrate through the soil test block semicircular retaining plate front and back, two sides of the screw rods are connected to the cross beam of the operation frame 1 through nuts 10, lateral limit adjusting plates 11 and springs 12 are symmetrically arranged on the inner side of the operation frame 1, and spring limiting rings 13 are connected to the lateral limit adjusting plates 11; the screw rods 9 are 12mm in diameter and are symmetrically arranged at the two sides of the circular soil retaining plate of the soil test block up and down, threads are arranged at the ends of the two sides and are arranged on the cross beam of the operation frame 1 through nuts 10, the middle section is smooth, and the screw rods penetrate through the circular soil retaining plate of the soil test block; the lateral limit adjusting plate 11 can be fixed at different positions on the screw rod 9 through nuts 10, and scales are marked at different fixed positions on the screw rod 9 to indicate the lateral limit condition, namely the force of the spring 12 at the moment when one end of the spring 12 is kept still on the side surface of the soil test block round retaining plate; the spring 12 is sleeved on the screw rod 9, and spring limiting rings 13 are arranged at two ends of the spring, so that the force of the spring 12 is ensured to be horizontally perpendicular to the side surface of the circular soil retaining plate of the soil test block.
As shown in fig. 6, the inner wall of the semi-cylindrical plate 14 has a pressure sensor 17 for measuring the amount of pressure applied by the soil test block to the inner wall of the semi-cylindrical plate 14 during the loading performed by the loading device. The joint transition of the semi-cylindrical plate 14 and the vertical baffle 15 is provided with a rib 16 for reinforcing the strength of the semi-cylindrical plate 14. In addition, the butt joint of the two semi-cylindrical plates 14 has a step structure, which has a certain guiding function, and facilitates the assembly of the two semi-cylindrical plates 14, and when the two semi-cylindrical plates 14 are assembled together, the step structures at the raised positions inside the two semi-cylindrical plates 14 can be mutually meshed.
The soil test block baffle 4 is two mutually meshed semi-cylindrical plates 14, the outer side is a vertical baffle 15, and the size of the cylinder is as follows: d=100mm, h=200mm, panel thickness 10mm, semi-cylinder plate 14 is connected as an organic whole with perpendicular baffle 15 and there are three floor 16 between the two, two semi-cylinder plates 14 contain the interface and about centre of a circle rotational symmetry, semi-cylinder plate 14 inboard has the recess and installs pressure sensor 17, pressure sensor 17 is connected to the computer, be convenient for record its pressure value at each moment of loading, the perpendicular baffle 15 side is the through-hole of horizontal counter-force brace 3, the trompil diameter equals with screw 9 diameter, be connected with spring spacing ring 13 around the trompil and guarantee that spring 12 power is perpendicular to perpendicular baffle 15 side, soil test block baffle 4 is Polytetrafluoroethylene (PTFE) material, adopt this kind of material can reduce the dead weight, increase the lubrication degree, friction force when making its baffle movable surface 5 of placing on the sub-bottom plate of handling frame 1 move to both sides is less, reduce measuring error.
The transverse beam is provided with a dial indicator 6, a test end of the dial indicator 6 is abutted against the outer side face of the vertical baffle 15, and the dial indicator 6 is used for measuring the displacement distance of the vertical baffle 15 in the horizontal direction. In this embodiment, the test end of the dial indicator 6 passes through the lateral limit adjusting plate 11 at one side to be abutted against the outer side surface of the vertical baffle 15, so that the structure is more compact.
As shown in fig. 4 and 5, the inside of the lateral limit adjusting plate 11 and/or the outside of the vertical barrier 15 is provided with a spring retainer 13 for positioning the spring 12.
Preferably, the baffle moving surface 5 is a high-fiber ceramic plate, and the soil test block baffle 4 is a plate body made of polytetrafluoroethylene material.
Example 2
The embodiment proposes a method for implementing soil pressure test, using the soil pressure test device as in example 1, comprising the steps of:
s1, manufacturing a soil test block: immediately after the soil sample is taken on site, the soil sample is made into a standard soil test block. The size and the dimension are as follows: d=100mm, h=200mm, the disturbance to the soil test block is avoided in the manufacturing process; the collected sample accords with the related regulations of JTG E40-2007 chapter 4 of the Highway geotechnical test regulations; the preparation process of the soil sample is in accordance with the 16 th to 3 rd regulations of the geotechnical test method standard GB/T50123-1999;
s2, debugging and checking the instrument: before the test, checking whether each sensor can be normally used or not, ensuring that the whole test process can normally work, cleaning the moving surface of the soil test block baffle 4 and the screw 99 without foreign matters, and smearing a lubricant to reduce friction;
s3, soil placing test blocks. Removing the loading plate 2, removing the soil test block baffle 4, and placing the soil test block at a designated position; resetting the baffle, adjusting the position of the lateral limit adjusting plate 11 to enable the spring 12 to be in a free stretching state initially, not extruding the soil test block baffle 4, placing the measuring end of the dial indicator 6 on the side surface and resetting;
s4, load is applied: the loading plate 2 is placed on the vertical rod of the operation frame 1, a load is applied above the guide plate 7, the load is loaded to the semicircular baffle plates of the two soil test blocks, the displacement is stable, then the load is unloaded, in the process, the soil pressure value on the pressure sensor 17 is recorded through a computer, and the maximum reading of the dial indicator 6 is recorded.
S5, side limit adjustment: the position of the lateral limit adjusting plate 11 is adjusted to enable the spring 12 to generate different initial lateral forces, the steps S1-S4 are repeated, and the value of the load reading pressure sensor 17 and the soil side displacement value of the dial indicator 6 are applied until the test data are complete;
s6, unloading the loader after the test is finished, and recovering the initial positions of the instruments, and cleaning the inner side of the soil test block baffle 4 and the baffle moving surface 5 so as to facilitate the next test.
The foregoing is merely exemplary of the present invention, and those skilled in the art can make many variations in the specific embodiments and application scope according to the spirit of the present invention, as long as the variations do not depart from the spirit of the invention.
Claims (9)
1. The utility model provides a soil pressure testing arrangement which characterized in that: comprises an operation frame, a loading device, a horizontal counter-force support and a soil test block baffle, wherein
The operation frame comprises a baffle moving surface with a planar and smooth top surface, and cross beams are arranged on two sides of the operation frame in a first direction;
the front surface of the soil test block baffle main body is provided with two semi-cylindrical plates which are cut along the axial direction, the main bodies of the two semi-cylindrical structures can be spliced to form a cylindrical structure, a cavity in the cylindrical structure is used for placing a soil test block, the two semi-cylindrical plates are placed on the moving surface of the baffle, the back surface of the semi-cylindrical plate is provided with a vertical baffle which is vertically arranged and is vertical to the first direction, and four guide mounting holes are formed in the baffles at the two sides;
the horizontal counter-force support comprises two lateral limit adjusting plates, a plurality of nuts, four screws and eight springs, wherein the middle section of each screw is a light section, each screw is inserted into a guide mounting hole, the eight springs are sleeved outside the four screws, each lateral limit adjusting plate is provided with a light hole, each lateral limit adjusting plate is sleeved on each screw through each light hole, the two lateral limit adjusting plates are respectively positioned on two sides of the two semi-cylindrical plates, the first ends of the springs are abutted against the outer side surfaces of the vertical baffle plates, the second ends of the springs are abutted against the inner side surfaces of the lateral limit adjusting plates, and the nuts are connected onto the screws through threads and are abutted against the outer sides of the lateral limit adjusting plates;
the combined body of the horizontal counter-force support and the soil test block baffle is placed on the operation frame, the soil test block baffle is placed on the moving surface of the baffle, and the horizontal counter-force support is connected to the cross beam through a screw.
2. The soil pressure testing device of claim 1, wherein: the inner wall of the semi-cylindrical plate is provided with a pressure sensor for measuring the pressure value applied by the soil test block to the inner wall of the semi-cylindrical plate in the loading process of the loading device.
3. The soil pressure testing device of claim 1, wherein: the transverse beam is provided with a dial indicator, a test end of the dial indicator is abutted to the outer side face of the vertical baffle, and the dial indicator is used for measuring the displacement distance of the vertical baffle in the horizontal direction.
4. The soil pressure testing device of claim 1, wherein: and rib plates for reinforcing the strength of the semi-cylindrical plates are arranged at the connection transition positions of the semi-cylindrical plates and the vertical baffle plates.
5. The soil pressure testing device of claim 1, wherein: and a spring limiting ring for positioning the spring is arranged on the inner side of the side limiting adjusting plate and/or the outer side of the vertical baffle plate.
6. The soil pressure testing device of claim 1, wherein: the loading device is a loading plate, and the loading plate comprises a guide plate and a plate-shaped loading plate;
the operation frame comprises a bottom plate and upright posts positioned at four corners of the top surface of the bottom plate, through holes are formed in the four corners of the guide plate, the guide plate is arranged on the upright posts through the through holes and can vertically slide along the upright posts, the load plate is fixedly connected to the bottom surface of the guide plate, the load plate corresponds to the open end of the top of the tubular structure, and the shape and the area of the load plate are consistent with those of the open end of the top of the tubular structure.
7. The soil pressure testing device of claim 1, wherein: the baffle moving surface is a high-fiber ceramic plate, and the soil test block circular baffle is a plate body made of polytetrafluoroethylene materials.
8. The soil pressure testing device of claim 1, wherein: the size of the cavity inside the tubular structure is as follows: d=100 mm, h=200 mm.
9. A method of performing a soil pressure test using the soil pressure test device of any one of claims 1 to 8, characterized in that: the method comprises the following steps:
s1, manufacturing a soil test block: immediately preparing a soil sample into a standard soil test block after taking a soil sample on site; the size and the dimension are as follows: d=100mm, h=200mm, the disturbance to the soil test block is avoided in the manufacturing process; the collected sample accords with the related regulations of JTG E40-2007 chapter 4 of the Highway geotechnical test regulations; the preparation process of the soil sample is in accordance with the 16 th to 3 rd regulations of the geotechnical test method standard GB/T50123-1999;
s2, debugging and checking the instrument: before the test, checking whether each sensor can be used normally or not, ensuring that the whole test process can work normally, cleaning the moving surface of the soil test block baffle and the screw rod, removing foreign matters smoothly, and smearing a lubricant to reduce friction;
s3, soil placing test blocks: removing the loading plate, removing the soil test block baffle, and placing the soil test block at a designated position; resetting the baffle, adjusting the position of the lateral limit adjusting plate to enable the spring to be in a free stretching state initially, not extruding the soil test block baffle, placing the measuring end of the dial indicator on the lateral surface and resetting;
s4, load is applied: the loading plate is placed on a vertical rod of the operation frame, a load is applied above the guide plate, the load is loaded to the semicircular baffle plates of the two soil test blocks, the displacement is stable, then the load is unloaded, in the process, the soil pressure value on the pressure sensor is recorded through a computer, and the maximum reading of the dial indicator is recorded;
s5, side limit adjustment: the position of the lateral limit adjusting plate is adjusted to enable the spring to generate different initial lateral forces, the steps S1-S4 are repeated, and the load is applied to read the value of the pressure sensor and the soil side displacement value on the dial indicator until the test data are complete;
s6, unloading the loader after the test is finished, recovering the initial positions of the instruments, and cleaning the inner side of the baffle plate of the soil test block and the moving surface of the baffle plate so as to facilitate the next test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310317689.XA CN116625813A (en) | 2023-03-29 | 2023-03-29 | Soil pressure testing device and implementation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310317689.XA CN116625813A (en) | 2023-03-29 | 2023-03-29 | Soil pressure testing device and implementation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116625813A true CN116625813A (en) | 2023-08-22 |
Family
ID=87601520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310317689.XA Pending CN116625813A (en) | 2023-03-29 | 2023-03-29 | Soil pressure testing device and implementation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116625813A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117871267A (en) * | 2024-03-12 | 2024-04-12 | 西南交通大学 | Consolidation apparatus and implementation method for non-confined condition |
-
2023
- 2023-03-29 CN CN202310317689.XA patent/CN116625813A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117871267A (en) * | 2024-03-12 | 2024-04-12 | 西南交通大学 | Consolidation apparatus and implementation method for non-confined condition |
| CN117871267B (en) * | 2024-03-12 | 2024-06-25 | 西南交通大学 | Consolidation apparatus and implementation method for non-confined condition |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109141905B (en) | Six-component force test bed and method for measuring vector thrust thereof | |
| CN209027758U (en) | The experimental rig of phantom frame beam column interior joint receiving horizontal earthquake action | |
| CN106948389B (en) | Soil pressure and displacement visual two-dimensional test system for soil retaining structure | |
| CN110554169A (en) | tunnel excavation process simulation test device and method | |
| CN109115510B (en) | Six-component force test bed and error determination method thereof | |
| CN116625813A (en) | Soil pressure testing device and implementation method | |
| CN103308234B (en) | Internal force measuring sensor | |
| CN102720220B (en) | Device and method for measuring counterforce of pile end of concrete pipe pile | |
| CN111366462A (en) | Multifunctional compression-shear testing machine | |
| CN109374246A (en) | Simulate the experimental rig that crossed beam and column node bears horizontal earthquake action | |
| CN106644329B (en) | 120MN bridge support testing machine for high-precision dynamic measurement | |
| CN103134701A (en) | Simultaneous monitoring method for welded steel truss structure fatigue failure process | |
| CN111486994A (en) | Expansion pressure and expansion volume integrated test device and test method for expansion material | |
| CN113916114B (en) | Pipeline deformation monitoring test device | |
| CN110186746A (en) | A kind of holding laterally and axially vertical structural test loading device and test method | |
| CN201765110U (en) | Satellite solar cell wing static load test device | |
| CN206095771U (en) | Many axial tension that contain crack defect component press loading device | |
| CN116296817A (en) | Mechanical model test device and method for reconstruction and expansion of roadbed supporting structure | |
| RU138372U1 (en) | AUTOMATED STAND FOR TESTING MODELS OF REINFORCED CONCRETE SHELLS AND PLATES | |
| RU2467305C1 (en) | Instrument of triaxial compression with measurement of contact stresses | |
| CN114993890A (en) | Particle medium contact force chain network test device | |
| CN109696400B (en) | Tunnel preliminary bracing and soil property surrounding rock bonding strength's testing arrangement | |
| CN114594048A (en) | Method for testing shear characteristics of waste tire-soil horizontal interface | |
| CN112881200A (en) | Loading device and method for shear stiffness test of longitudinal joint of pipe piece | |
| CN209446398U (en) | A kind of multiple dimensioned in situ strength test device of coarse-grained soil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |