CN112575762A - Multifunctional test device and method for simulating foundation load - Google Patents
Multifunctional test device and method for simulating foundation load Download PDFInfo
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- CN112575762A CN112575762A CN202011604928.2A CN202011604928A CN112575762A CN 112575762 A CN112575762 A CN 112575762A CN 202011604928 A CN202011604928 A CN 202011604928A CN 112575762 A CN112575762 A CN 112575762A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/02—Investigation of foundation soil in situ before construction work
- E02D1/022—Investigation of foundation soil in situ before construction work by investigating mechanical properties of the soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
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Abstract
The invention belongs to the technical field of geotechnical engineering, and particularly relates to a multifunctional test device for simulating foundation load, which comprises: the test box body is used for containing a sample; the upper part of the test box body is provided with a portal frame, the portal frame is provided with a jack, the jack is vertically placed and is positioned in the center of the test box body, the upper end of the jack is fixed with the portal frame, the lower end of the jack is detachably connected with a cover plate, and the size of the cover plate is matched with the inner cavity of the test box body; the cover plate is provided with a load sensor, a soil layer deformation tester, a pore water pressure gauge and a soil pressure gauge are arranged in the sample, and the soil layer deformation tester, the pore water pressure gauge, the soil pressure gauge, the load sensor and the jack are respectively and electrically connected with an external controller. The invention can simulate the whole process of treating various soils and different foundations, can realize the development and change of rock and soil parameters for testing foundation treatment for a long time, can also carry out load test on the bearing capacity of the consolidated or reinforced foundation, and has simple structure and visual and reliable test.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering, and particularly relates to a multifunctional test device and a test method for simulating foundation load.
Background
China is wide in regions, foundation soil is of various types, a plurality of soft foundations and special soil foundations exist, the foundations cannot meet the requirements for bearing capacity and deformation, and a building can be built on the foundations after manual reinforcement. The aim of the foundation treatment is to improve the engineering properties of the foundation soil, such as the shear strength, the compressibility, the permeability and the like of the foundation soil, by the foundation treatment technologies such as pre-pressing drainage consolidation, tamping cement soil piles, compaction piles, cement soil mixing piles and the like. The method has the advantages that the stress in soil, the pore water pressure, the soil layer deformation, the ground subsidence and the like are tracked and tested in the foundation treatment process, the change rule of the engineering property of the foundation soil is mastered in time, the important effect of guiding the construction rhythm and the construction safety control is achieved, and the foundation bearing capacity test is carried out after the foundation treatment is completed, so that the method is an important means and a necessary link for inspecting the foundation treatment quality and effect.
At present, in the professional teaching and scientific research of geotechnical engineering, a multifunctional experimental device which can systematically and comprehensively simulate the whole processes of soil with various properties and treatment of different foundations and test the development change of geotechnical parameters (including time and space changes of parameters such as pore water pressure, soil layer deformation, ground subsidence and the like) of foundation treatment for a long time and can also test the bearing capacity of the consolidated or reinforced foundation is not available.
Disclosure of Invention
In view of the above, the present invention provides a multifunctional testing apparatus and a testing method for simulating a foundation load, so as to solve the above-mentioned technical problems.
The technical scheme of the invention is as follows:
a multifunctional test device for simulating foundation load comprises:
the test box body is used for containing a sample;
a portal frame is erected at the upper part of the test box body, a jack is arranged on the portal frame, the jack is vertically placed and located in the center of the test box body, the upper end of the jack is fixed with the portal frame, the lower end of the jack is detachably connected with a cover plate, and the size of the cover plate is matched with the inner cavity of the test box body;
the soil layer deformation tester, the pore water pressure gauge, the soil pressure gauge, the load sensor and the jack are respectively and electrically connected with an external controller.
Preferably, a flange is arranged at the upper end of the test box body, a water drainage switch is arranged at the bottom of the test box body, a plurality of water drainage holes are formed in the middle of the peripheral side wall of the test box body, the water drainage holes are located at the same height, a water drainage groove is formed below the water drainage holes and surrounds the peripheral side wall of the test box body, a water drainage pipe is connected to the water drainage groove, and the water drainage pipe is communicated with a wastewater disposal basin.
Preferably, the cover plate comprises a steel skeleton and a steel plate arranged below the steel skeleton.
Preferably, the door-shaped frame comprises two I-shaped steel counterforce frame columns, the two I-shaped steel counterforce frame columns are vertically arranged and are parallel to each other, the upper ends of the I-shaped steel counterforce frame columns are provided with counterforce frame cross beams, the two ends of each counterforce frame cross beam are respectively vertically fixed with the two I-shaped steel counterforce frame columns, the two counterforce frame inclined struts are obliquely arranged and are respectively positioned on the two sides of the counterforce frame cross beam, and the two ends of each counterforce frame inclined strut are respectively fixed with the I-shaped steel counterforce frame columns and the counterforce frame cross beams.
Preferably, the lifting jack further comprises a loading plate for replacing the cover plate, and the loading plate is detachably connected with the lower end of the lifting jack.
Preferably, the method further comprises the following steps:
two reference beams are one group and vertically arranged between two groups, two reference beams of each group are symmetrically arranged on two sides of the loading plate and are parallel to each other, and two reference beams of one group cross over the flange;
the four settlement test meters are used for testing settlement of the loading plate and are respectively arranged on the reference beams in a one-to-one correspondence mode, and measuring heads of the settlement test meters are in contact with the upper surface of the loading plate.
Preferably, the bottom of the test box body is provided with a moving device.
A test method of a multifunctional test device for simulating foundation load comprises the following steps:
carrying out consolidation treatment on the foundation;
removing the cover plate and replacing the cover plate with a loading plate;
two datum beams are spanned on the flange and symmetrically placed on two sides of the loading plate, and the other two datum beams are perpendicular to the two datum beams which are placed in the past and symmetrically placed on two sides of the loading plate in the other direction; symmetrically fixing the bases of the settlement test meters on the four reference beams, and supporting the measuring heads of the settlement test meters at different positions of the loading plate;
the jack is controlled by the controller, loads of different grades are applied to the loading plate, data of the settlement test table under the loads of different grades are recorded respectively, and a relation curve between the loads and foundation deformation is obtained, so that experimental simulation of foundation loads is achieved.
Preferably, the method for consolidating the foundation comprises the following steps:
paving soft soil into a test box body layer by layer, simultaneously embedding a settling pipe and a layered settlement mark into a soil layer, respectively embedding a pore water pressure gauge and a soil pressure gauge at positions needing to test pore water pressure and soil stress, embedding the soft soil to the lower edge of a drain hole, then inserting a drain board or other vertical drainage bodies into the soil according to a preset plane arrangement scheme, wherein the top surface of the drain board is higher than the soft soil layer and extends into a permeable sand layer laid on the soft soil layer;
covering the cover plate on the permeable sand layer, and simultaneously penetrating test lines of the soil layer deformation tester, the pore water pressure gauge and the soil pressure gauge out of holes reserved on the cover plate and exposing the test lines to the outside to be electrically connected with an external controller;
installing bases of the settlement test meters at different positions of a flange on the top surface of the box body;
and starting the controller, controlling the load applied by the jack through the controller, applying loads of different grades to the soft soil, simultaneously acquiring data of the soil layer deformation tester, the pore water pressure gauge settlement tester and the soil pressure gauge in real time, sending the data acquired in real time to the controller for processing, and finishing consolidation processing when the data acquired in real time reaches a preset lower threshold value of consolidation indexes.
The invention provides a multifunctional test device and a test method for simulating foundation load, which can simulate the whole process of testing various properties of soil and different foundation treatment methods, and can simultaneously test the soil stress, the pore water pressure, the soil layer deformation and the ground settlement in the foundation treatment process; carrying out a load test on the foundation treatment effect, and comparing the engineering property change of the foundation soil before and after the foundation treatment so as to evaluate the foundation treatment quality and the foundation bearing capacity; carrying out simulation experiment research and long-term test analysis on the consolidation or reinforcement treatment process of the soft foundation and the special soil foundation; and carrying out experimental teaching of foundation treatment courses.
The multifunctional test device and the test method for simulating foundation load provided by the invention have the following beneficial effects: the device can systematically and comprehensively simulate the whole process of treating various soils and different foundations, can realize the development and change of rock-soil parameters for testing foundation treatment for a long time, and can also carry out load test on the bearing capacity of the consolidated or reinforced foundation.
Drawings
Fig. 1 is a perspective view of the overall structure of a use state 1 of the present invention;
FIG. 2 is a front view of the overall structure of the state of use 1 of the present invention;
FIG. 3 is a right side view of the overall structure of the use state 1 of the present invention;
fig. 4 is a perspective view of the overall structure of the use state 2 of the present invention;
FIG. 5 is a front view of the overall structure of the state of use 2 of the present invention;
FIG. 6 is a right side view of the overall structure of the use state 2 of the present invention;
fig. 7 is a plan view of the overall structure of the use state 2 of the present invention.
Reference numerals:
1. a test box body; 2. a flange; 3. a water discharge tank; 4. a cover plate; 5. a drain pipe; 6. a universal wheel; 7. a drain switch; 8. a drain hole; 9. a settlement test meter; 10. a jack; 11. a load sensor; 12. a soil layer deformation tester; 13. a pore water pressure gauge; 14. a soil pressure gauge; 15-1, a reaction frame beam; 15-2, a counterforce frame column; 15-3, a reaction frame inclined strut; 16. a reference beam; 17. and a loading plate.
Detailed Description
The invention provides a multifunctional test device and a test method for simulating foundation load, which are described below with reference to the structural schematic diagrams of fig. 1 to 7.
A multifunctional test device for simulating foundation load comprises:
the test box body 1 is used for containing a sample; a portal frame is erected at the upper part of the test box body 1, a jack 10 is arranged on the portal frame, the jack 10 is vertically placed and is positioned in the center of the test box body 1, the upper end of the jack 10 is fixed with the portal frame, the lower end of the jack is detachably connected with a cover plate 4, and the size of the cover plate 4 is matched with the inner cavity of the test box body 1; the cover plate 4 is provided with a load sensor 11, a soil layer deformation tester 12, a pore water pressure gauge 13 and a soil pressure gauge 14 are arranged in the sample, and the soil layer deformation tester 12, the pore water pressure gauge 13, the soil pressure gauge 14, the load sensor 11 and the jack 10 are respectively and electrically connected with an external controller.
Further, the upper end of the test box body 1 is provided with a flange 2, the bottom of the test box body is provided with a water drainage switch 7, the middle parts of the peripheral side walls of the test box body 1 are provided with a plurality of water drainage holes 8, the plurality of water drainage holes 8 are located at the same height, a water drainage groove 3 is arranged below the water drainage holes 8, the water drainage groove 3 surrounds the peripheral side walls of the test box body 1, the water drainage groove 3 is connected with a water drainage pipe 5, and the water drainage pipe 5 is communicated with a wastewater disposal basin.
Further, the cover plate 4 comprises a steel skeleton and a steel plate arranged below the steel skeleton.
Further, the door-shaped frame comprises two I-shaped steel counter-force frame columns 15-2, the two I-shaped steel counter-force frame columns 15-2 are vertically arranged and parallel to each other, a counter-force frame cross beam 15-1 is arranged at the upper end of each I-shaped steel counter-force frame column 15-2, two ends of each counter-force frame cross beam 15-1 are respectively and vertically fixed with the two I-shaped steel counter-force frame columns 15-2, two counter-force frame inclined struts 15-3 are obliquely arranged and are respectively located on two sides of each counter-force frame cross beam 15-1, and two ends of each counter-force frame inclined strut are respectively fixed with the I-shaped steel counter-force frame columns 15-2 and the counter-force frame cross. Further, the lifting jack further comprises a loading plate 17 for replacing the cover plate 4, and the loading plate 17 is detachably connected with the lower end of the lifting jack 10.
Further, the method also comprises the following steps: two of the four reference beams 16 are in a group, two groups of the two reference beams are vertically arranged, the two reference beams 16 of each group are symmetrically arranged on two sides of the loading plate 17 and are parallel to each other, and the two reference beams 16 of one group cross over the flange 2; the four settlement test meters 9 are used for testing settlement of the loading plate 17 and are respectively arranged on the reference beam 16 in a one-to-one correspondence manner, and measuring heads of the settlement test meters 9 are in contact with the upper surface of the loading plate 17.
Further, the bottom of the test box body 1 is provided with a moving device.
A test method of a multifunctional test device for simulating foundation load comprises the following steps: carrying out consolidation treatment on the foundation; the cover plate 4 is removed and replaced by a loading plate 17;
two datum beams 16 are spanned on the flange 2 and symmetrically placed on two sides of the loading plate 17, and the other two datum beams 16 are perpendicular to the two datum beams 16 placed previously and symmetrically placed on two sides of the loading plate 17 in the other direction; symmetrically fixing 4 bases of the settlement test meter 9 on four reference beams 16, and then supporting a measuring head of the settlement test meter 9 at different positions of a loading plate 17;
the jack 10 is controlled by the controller, loads of different grades are applied to the loading plate 17, data of the load subsidence test meter 9 of different grades are recorded respectively, and a relation curve between the loads and foundation deformation is obtained, so that experimental simulation of foundation loads is achieved.
Further, the method for carrying out consolidation treatment on the foundation comprises the following steps:
paving soft soil into a test box body 1 layer by layer, simultaneously embedding a settling pipe and a layered settlement mark into a soil layer, embedding a pore water pressure gauge 13 and a soil pressure gauge 14 in positions needing to test pore water pressure and soil stress respectively, embedding the soft soil to the lower edge of a drain hole 8, then inserting a drain board or other vertical drainage bodies into the soil according to a preset plane arrangement scheme, wherein the top surface of the drain board is higher than the soft soil layer and extends into a permeable sand layer laid on the soft soil layer;
covering the cover plate 4 on the permeable sand layer, and simultaneously penetrating test lines of the soil layer deformation tester 12, the pore water pressure gauge 13 and the soil pressure gauge 14 out of holes reserved on the cover plate 4 and exposing the test lines to the outside to be electrically connected with an external controller; installing bases of the settlement test meters 9 at different positions of the flange 2 on the top surface of the box body;
and starting the controller, controlling the jack 10 to apply loads through the controller, applying loads of different grades to the weak soil, simultaneously acquiring data of the soil layer deformation tester 12, the pore water pressure meter 13 settlement tester 9 and the soil pressure meter 14 in real time, sending the data acquired in real time to the controller for processing, and finishing consolidation processing when the data acquired in real time reaches a preset lower threshold value of consolidation indexes.
In specific use, the test box body 1 is made of a thick steel plate and can be made into a cylinder or a cuboid for containing soil.
In order to facilitate the movement of the experimental device, as shown in fig. 1 to 6, 4 universal wheels 6 are mounted on the bottom surface of the experimental box 1; a water drainage opening is formed in the bottom of the test box body 1, and water in the test box is drained through a water drainage switch 7; i-shaped steel counterforce frame columns 15-2 are welded on two side faces of the test box body 1, the tops of the columns are connected by I-shaped steel to serve as counterforce frame cross beams 15-1, the counterforce frame cross beams 15-1 are connected with the counterforce frame columns 15-2 through counterforce frame inclined struts 15-3, and the rigidity and the bearing capacity of the counterforce frame cross beams 15-1 are improved; the periphery of the top edge opening of the test box body 1 is welded with the flange 2, so that the test box body 1 is stiffened and can be used for installing a base of the settlement test meter 9; a plurality of drain holes 8 are formed in the same height of the peripheral side wall of the test box body 1 which is 20-25 cm below the flange 2, so that pore water discharged in the process of soil consolidation in the box body can be discharged from the drain holes 8 in the side wall of the box body in time; a drainage groove 3 is welded under the drain hole 8, and the drainage groove 3 is used for containing water drained from the drain hole 8, gathering the water to one position and collecting and processing the water by a drain pipe 5; during a foundation treatment simulation test, soil is filled in the test box body 1 to the lower edge of the drain hole 8, then a 20cm sand cushion layer is laid above the soil, then a cover plate 4 is covered on the sand cushion layer, the cover plate 4 is formed by welding a thick steel plate and profile steel, and the profile steel is used as a stiffening rib and welded on the periphery of the steel plate, the transverse axial symmetry axis and the diagonal position; a load sensor 11 is placed in the center of the upper portion of the cover plate 4, a jack 10 is placed on the load sensor 11, the jack 10 generates reaction force on the cover plate 4 by jacking a reaction frame cross beam 15-1, and consolidation pressure on a soil body is formed; the jack 10 is controlled by a controller to apply consolidation load to the cover plate 4, and the data of soil layer deformation, pore water pressure and soil pressure of the test box body 1 are respectively obtained by measuring a soil layer deformation tester 12, a pore water pressure meter 13 and a soil pressure meter 14 which are pre-embedded in soil.
When the foundation is consolidated, as shown in fig. 1 to 3, firstly paving weak soil into a test box body 1 layer by layer, simultaneously embedding a settling pipe and a layered settlement mark into a soil layer, embedding a pore water pressure gauge 13 and a soil pressure gauge 14 in positions where pore water pressure and soil middle stress are required to be tested respectively, embedding the weak soil to the lower edge of a drain hole 8, then inserting a drainage plate or other vertical drainage bodies into the soil according to a preset plane arrangement scheme, wherein the top surface of the drainage plate is higher than the soft soil layer and extends into a permeable sand layer paved on the soft soil layer;
and then, covering the cover plate 4 on the permeable sand layer, and simultaneously, penetrating test lines of the soil layer deformation tester 12, the pore water pressure gauge 13 and the soil pressure gauge 14 out of holes reserved on the cover plate 4 to be exposed outside and electrically connected with an external controller so as to collect related data. Before applying the pre-pressing load, the base of the settlement test meter 9 is firstly installed at different positions of the flange 2 on the top surface of the box body and is used for testing the ground settlement amount in the soft soil drainage consolidation process. And water in the soft soil seeps into the permeable sand layer under the action of the pre-pressing load, is discharged from the water discharge holes 8 and flows into the water discharge tank 3, and is finally collected into a wastewater disposal basin through the water discharge pipe.
And starting the controller, controlling the jack 10 to apply loads through the controller, applying loads of different grades to the weak soil, simultaneously acquiring data of the soil layer deformation tester 12, the pore water pressure meter 13 settlement tester 9 and the soil pressure meter 14 in real time, sending the data acquired in real time to the controller for processing, and finishing consolidation processing when the data acquired in real time reaches a preset lower threshold value of consolidation indexes.
After the soft soil and the special soil foundation are treated and consolidated, a foundation bearing capacity experiment can be carried out to check the effect of foundation treatment, and the concrete steps are as follows:
as shown in fig. 4 to 7, the cover plate 4 is removed and replaced with a loading plate 17;
two datum beams 16 are spanned on the flange 2 on the top surface of the box body and symmetrically placed on two sides of the loading plate 17, and then the other two datum beams 16 are vertically placed on the transverse datum beams 16 and symmetrically placed on two sides of the loading plate 17 in the other direction; symmetrically fixing 4 bases of the settlement test meter 9 on four reference beams 16, and supporting a measuring head of the settlement test meter 9 at different positions of a loading plate 17; the jack 10 is controlled by the controller, loads of different grades are applied to the loading plate 17, data of the load subsidence test meter 9 of different grades are recorded respectively, a relation curve between the loads and foundation deformation is obtained, and experimental simulation of foundation loads is achieved.
The multifunctional test device for simulating the foundation load can systematically and comprehensively simulate various soils with various properties and different foundation treatment overall processes, can realize long-term test on the development and change of the parameters of the ground treated by the foundation, can also carry out load test on the bearing capacity of the consolidated or reinforced foundation, and has the advantages of simple structure, intuitive and reliable test, strong practicability and popularization value.
The above disclosure is only for the preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (9)
1. The utility model provides a multi-functional test device of simulation ground load which characterized in that includes:
the test box body (1) is used for containing a sample;
a portal frame is erected at the upper part of the test box body (1), a jack (10) is arranged on the portal frame, the jack (10) is vertically placed and located in the center of the test box body (1), the upper end of the jack (10) is fixed with the portal frame, the lower end of the jack is detachably connected with a cover plate (4), and the size of the cover plate (4) is matched with the inner cavity of the test box body (1);
the soil layer deformation tester is characterized in that a load sensor (11) is arranged on the cover plate (4), a soil layer deformation tester (12), a pore water pressure gauge (13) and a soil pressure gauge (14) are arranged in the sample, and the soil layer deformation tester (12), the pore water pressure gauge (13), the soil pressure gauge (14), the load sensor (11) and the jack (10) are respectively electrically connected with a peripheral controller.
2. The multifunctional test device for simulating foundation load according to claim 1, wherein a flange (2) is arranged at the upper end of the test box body (1), a drain switch (7) is arranged at the bottom of the test box body, a plurality of drain holes (8) are arranged in the middle of the peripheral side wall of the test box body (1), the plurality of drain holes (8) are located at the same height, a drain tank (3) is arranged below the drain holes (8), the drain tank (3) is arranged around the peripheral side wall of the test box body (1), a drain pipe (5) is connected to the drain tank (3), and the drain pipe (5) is communicated with a wastewater disposal basin.
3. The multifunctional test device for simulating foundation load according to claim 1, wherein the cover plate (4) comprises a steel skeleton and a steel plate arranged below the steel skeleton.
4. The multifunctional test device for simulating foundation load according to claim 1, wherein the portal frame comprises two i-steel reaction frame columns (15-2), the two i-steel reaction frame columns (15-2) are vertically arranged and parallel to each other, reaction frame cross beams (15-1) are arranged at the upper ends of the i-steel reaction frame columns (15-2), two ends of each reaction frame cross beam (15-1) are respectively and vertically fixed with the two i-steel reaction frame columns (15-2), two reaction frame inclined struts (15-3) are obliquely arranged and respectively located at two sides of each reaction frame cross beam (15-1), and two ends of each reaction frame inclined strut are respectively fixed with the i-steel reaction frame columns (15-2) and the reaction frame cross beams (15-1).
5. The multifunctional test device for simulating foundation load according to claim 2, further comprising a loading plate (17) for replacing the cover plate (4), wherein the loading plate (17) is detachably connected with the lower end of the jack (10).
6. The multifunctional testing device for simulating foundation load according to claim 5, further comprising:
the two reference beams (16) are in one group and are vertically arranged between the two groups, the two reference beams (16) of each group are symmetrically arranged on two sides of the loading plate (17) and are parallel to each other, and the two reference beams (16) of one group cross over the flange (2);
the four settlement test meters (9) are used for testing settlement of the loading plate (17), are respectively arranged on one reference beam (16) in a one-to-one correspondence mode, and measuring heads of the settlement test meters (9) are in contact with the upper surface of the loading plate (17).
7. A multifunctional test device for simulating foundation load according to any one of claims 1-6, characterized in that the bottom of the test box (1) is provided with a moving device.
8. A test method of a multifunctional test device for simulating foundation load is characterized by comprising the following steps:
carrying out consolidation treatment on the foundation;
the cover plate (4) is removed and replaced by a loading plate (17);
two datum beams (16) are spanned on the flange (2) and symmetrically placed on two sides of the loading plate (17), and then the other two datum beams (16) are perpendicular to the two datum beams (16) placed in the previous way and symmetrically placed on two sides of the loading plate (17) in the other direction; symmetrically fixing bases of 4 settlement test meters (9) on four reference beams (16), and propping a measuring head of the settlement test meter (9) to different positions of a loading plate (17);
the jack (10) is controlled by the controller, loads of different grades are applied to the loading plate (17), data of the load subsidence test table (9) of different grades are recorded respectively, and a relation curve between the loads and foundation deformation is obtained, so that experimental simulation of foundation loads is realized.
9. The test method of the multifunctional test device for simulating foundation load according to claim 8, wherein the method for performing consolidation treatment on the foundation comprises the following steps:
paving soft soil into a test box body (1) layer by layer, simultaneously embedding a settling pipe and a layered settlement mark into a soil layer, embedding a pore water pressure gauge (13) and a soil pressure gauge (14) at positions needing to test pore water pressure and soil stress respectively, embedding the soft soil into the lower edge of a drain hole (8), then inserting a drain board or other vertical drainage bodies into the soil according to a preset plane arrangement scheme, wherein the top surface of the drain board is higher than the soft soil layer and extends into a permeable sand layer paved on the soft soil layer;
covering the cover plate (4) on the permeable sand layer, and simultaneously penetrating test lines of the soil layer deformation tester (12), the pore water pressure gauge (13) and the soil pressure gauge (14) out of holes reserved on the cover plate (4) and exposing the test lines to the outside to be electrically connected with an external controller;
installing bases of the settlement test meters (9) at different positions of the box body top surface flange (2);
and starting the controller, controlling the jack (10) to apply loads through the controller, applying loads of different grades to the weak soil, simultaneously acquiring data of the soil layer deformation tester (12), the pore water pressure meter (13), the settlement test meter (9) and the soil pressure meter (14) in real time, sending the data acquired in real time to the controller for processing, and finishing consolidation processing when the data acquired in real time reaches a lower threshold value of a preset consolidation index.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011604928.2A CN112575762A (en) | 2020-12-29 | 2020-12-29 | Multifunctional test device and method for simulating foundation load |
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| CN202011604928.2A CN112575762A (en) | 2020-12-29 | 2020-12-29 | Multifunctional test device and method for simulating foundation load |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115262662A (en) * | 2022-06-23 | 2022-11-01 | 中建东设岩土工程有限公司 | Suspension type cement mixing pile composite foundation indoor model test device |
| CN117804943A (en) * | 2024-02-29 | 2024-04-02 | 湖南百舸水利建设股份有限公司 | Cement soil penetration test method and detection device thereof |
-
2020
- 2020-12-29 CN CN202011604928.2A patent/CN112575762A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115262662A (en) * | 2022-06-23 | 2022-11-01 | 中建东设岩土工程有限公司 | Suspension type cement mixing pile composite foundation indoor model test device |
| CN117804943A (en) * | 2024-02-29 | 2024-04-02 | 湖南百舸水利建设股份有限公司 | Cement soil penetration test method and detection device thereof |
| CN117804943B (en) * | 2024-02-29 | 2024-05-10 | 湖南百舸水利建设股份有限公司 | Cement soil penetration test method and detection device thereof |
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