Underwater soft foundation treatment comprehensive test simulation system based on gravel pile

Abstract

The invention belongs to the technical field of gravel pile foundation treatment, and particularly relates to an underwater soft foundation treatment comprehensive test simulation system based on gravel piles, and a device main body is divided into two parts: a test secondary barrel and a test primary barrel. Hooks are arranged on the four wall faces of the sub-barrel body, an annular groove is formed in the outer wall of the top of the sub-barrel body, and the annular outer hoop is connected into the annular groove in an inserted mode. The mother barrel body is divided into an upper structure and a lower structure, the sealing performance of the joint is guaranteed, and water can be added into the mother barrel body in an experiment to simulate an underwater environment. Universal guide wheels capable of being locked are arranged at the bottom of the main barrel body, a water outlet is formed in the position, close to the edge, of the bottom of the main barrel body, and a controllable water outlet valve is installed at the water outlet. In addition, the system comprises a vacuum preloading system, a pore pressure measuring system and a ground temperature measuring system, and all the devices form the whole system to jointly complete an underwater soft foundation treatment comprehensive simulation experiment.

Description

Technical Field

[0001] The invention belongs to the technical field of gravel pile foundation treatment, and in particular relates to a comprehensive test simulation system for underwater soft foundation treatment based on gravel piles. Background Art

[0002] There are a large number of soft soil areas in my country, and soft foundation treatment has become an inevitable problem faced by engineering construction. The gravel pile method refers to a method of reinforcing the foundation when building structures such as embankments on soft foundations. The gravel pile foundation treatment method has achieved good results since it was introduced into my country. The application of related equipment and technology should be subject to certain tests before being put into engineering construction to verify the feasibility of its implementation, so as to avoid irreparable losses caused by errors when the project is put into use. The present invention is to promote related experiments on gravel pile soft soil foundation treatment. Summary of the invention

[0003] In order to achieve the above object, the present invention adopts the following technical solutions: A comprehensive test simulation system for underwater soft foundation treatment based on gravel piles, which includes a test sub-barrel, an experimental main barrel, a vacuum preloading system, a pore pressure measurement system and a ground temperature measurement system; The test sub-barrel comprises a sub-barrel body, an annular groove connected to the outer wall of the top of the sub-barrel body, an annular outer hoop above the annular groove, a hook and a sub-barrel scale arranged on the outer wall of the sub-barrel body, and a tenon structure at the bottom of the sub-barrel body; The experimental mother barrel comprises a mother barrel body, a mother barrel bottom plate and a universal guide wheel are installed at the bottom of the mother barrel body, a mother barrel scale is arranged on the outer wall of the mother barrel body, a drainage port at the bottom of the mother barrel body near the edge, and a mortise structure at the bottom of the mother barrel body; The vacuum preloading system comprises a suction filter bottle, an air valve and a vacuum gauge located on the top of the suction filter bottle, a fixing frame for placing the suction filter bottle, a drainage plate connected through a first conduit, and a vacuum pump connected to the air valve through a second conduit; The pore pressure measurement system includes a pore pressure gauge and a vacuum gauge; The ground temperature measurement system includes a monitor and a temperature sensor.

[0004] As a further improvement of the present invention, the sub-barrel body, the annular groove, the hook, the tenon structure, the mother barrel body, the drain port, the mortise structure and the filter bottle are all made of transparent materials.

[0005] As a further improvement of the present invention, the annular outer hoop can be inserted into the annular groove, and the inner wall of the annular groove fits tightly with the outer wall of the annular outer hoop.

[0006] As a further improvement of the present invention, the minimum unit of the sub-barrel scale and the main barrel scale is mm.

[0007] As a further improvement of the present invention, the barrel body of the mother barrel adopts a segmented design, which is divided into detachable upper and lower structures. The upper and lower structures are tightly connected by a snap-on structure, the connection ensures sealing, and the upper and lower sections are at the same height.

[0008] As a further improvement of the present invention, a controllable water outlet valve is installed at the drain outlet.

[0009] As a further improvement of the present invention, the universal guide wheel is connected to the bottom plate of the mother barrel by screws, and a buckle is provided on the universal guide wheel.

[0010] As a further improvement of the present invention, the suction filtration bottle is placed on a fixing frame, and a supporting frame for fixing the suction filtration bottle is provided on the fixing frame.

[0011] As a further improvement of the present invention, a groove is provided at the head of the second conduit, one end of the drainage pipe is clamped in the groove, the second conduit passes through the geomembrane and extends into the sub-barrel body, and the other end of the drainage pipe is inserted into the soil in the sub-barrel body.

[0012] Compared with the prior art, the advantages of the present invention are: 1. A hook is set on the outer wall of the sub-barrel body. After the equipment is ready, the sub-barrel body can be transferred maneuverably according to the expected requirements by means of a crane, etc., to avoid the danger of manual handling.

[0013] 2. The sub-bucket scales on the wall of the sub-bucket record the height of the silt soft soil at various stages under vacuum preloading conditions during the test, combined with the amount of water discharged during the vacuum preloading process to obtain the degree of silt consolidation under this condition.

[0014] 3. A tenon structure is designed at the bottom of the sub-barrel body to facilitate fixing the position of the sub-barrel body during the test, preventing it from being offset during the experiment due to various factors, affecting the test data recording and the final results.

[0015] 4. The annular groove and annular outer hoop of the sub-barrel body are mainly used to fix the geomembrane, making the geotextile and the sub-barrel under the geomembrane a sealed and airtight environment.

[0016] 5. The mother barrel scale on the outer wall of the mother barrel is convenient for real-time monitoring of the water surface position and recording its changes during the experiment.

[0017] 6. The universal guide wheels at the bottom of the barrel can meet the requirements of mobility and convenience of indoor tests.

[0018] 7. The mother barrel body is assembled in sections to achieve disassembly and assembly, which is convenient for storage and the entry and fixation of the sub-barrel body at the beginning of the experiment. It is also convenient for the sub-barrel body to be removed from the mother barrel body as a whole when the sub-barrel body is removed. It is also convenient for cleaning the remaining water in the test equipment after the test.

[0019] 8. In the experiment, the mother barrel body mainly provides a water environment for the child barrel body, so that the experiment can simulate the original environment of the project to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the entire system structure of a comprehensive test simulation system for underwater soft foundation treatment based on gravel piles of the present invention; Figure 2 It is a schematic diagram of the sub-barrel structure of a comprehensive test simulation system for underwater soft foundation treatment based on gravel piles according to the present invention; Figure 3 This is a schematic diagram of the structure of a mother barrel of a comprehensive test simulation system for underwater soft foundation treatment based on gravel piles according to the present invention; Figure 4 This is a bottom diagram of a mother barrel body of a comprehensive test simulation system for underwater soft foundation treatment based on gravel piles of the present invention; Figure 5 It is a schematic diagram of the connection structure of the outer wall of the mother barrel of the comprehensive test simulation system for underwater soft foundation treatment based on gravel piles of the present invention; Figure 6 It is a schematic diagram of the structure of a vacuum preloading system of a comprehensive test simulation system for underwater soft foundation treatment based on gravel piles of the present invention; Figure 7 It is a schematic diagram of the structure of a drainage board of a comprehensive test simulation system for underwater soft foundation treatment based on gravel piles of the present invention; Figure 8 It is a schematic diagram of the structure of a pore pressure measurement system of a comprehensive test simulation system for underwater soft foundation treatment based on gravel piles of the present invention; Fig. 9 It is a schematic diagram of the structure of a ground temperature measurement system of a comprehensive test simulation system for underwater soft foundation treatment based on gravel piles of the present invention; Fig.10 It is a schematic diagram of equipment placement of a comprehensive test simulation system for underwater soft foundation treatment based on gravel piles of the present invention; The names of the numbers in the figure are: 1. sub-barrel body; 2. sub-barrel scale; 3. annular groove; 4. annular outer hoop; 5. hook; 6. tenon structure; 7. mother barrel body; 8. mother barrel scale; 9. mortise structure; 10. universal guide wheel; 11. buckle; 12. drain outlet; 13. mother barrel bottom plate; 14. buckle structure; 15. water outlet valve; 16. vacuum gauge; 17. air valve; 18. fixing frame; 19. filter bottle; 20. support frame; 21. first conduit; 22. second conduit; 23. vacuum pump; 24. vacuum gauge; 25. drain plate; 26. monitor; 27. piezometer; 28. temperature sensor; 29. ​​slot. DETAILED DESCRIPTION

[0021] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples or drawings are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0022] like Figure 1-9 As shown, a comprehensive test simulation system for underwater soft foundation treatment based on gravel piles according to an embodiment of the present invention comprises a test sub-barrel 101, an experimental mother barrel 201, a vacuum preloading system 301, a pore pressure measurement system 401 and a ground temperature measurement system 501; The test sub-barrel 101 comprises a sub-barrel body 1, an annular groove 3 connected to the outer wall of the top of the sub-barrel body 1, and an annular outer hoop 4 above the annular groove 3. The annular outer hoop 4 can be inserted into the annular groove 3, and the inner wall of the annular groove 3 is tightly fitted with the outer wall of the annular outer hoop 4. It is mainly used to fix geomembranes such as Figure 2 As shown, a hook 5 and a sub-barrel scale 2 are arranged on the outer wall of the sub-barrel body 1, and a tenon structure 6 is arranged at the bottom of the sub-barrel body 1.

[0023] The mother barrel 201 for the experiment includes a mother barrel body 7, which is designed in sections and is divided into detachable upper and lower structures. The upper and lower structures are tightly connected by a snap-on structure 14. A mother barrel bottom plate 13 and a universal guide wheel 10 are installed at the bottom of the mother barrel body 7. The universal guide wheel 10 is connected to the mother barrel bottom plate 13 by screws. A snap 11 is provided on the universal guide wheel 10, a mother barrel scale 8 is provided on the outer wall of the mother barrel body 7, and a mortise structure 9 is provided at the bottom of the mother barrel body 7. In the experiment, water needs to be added to the mother barrel to simulate an underwater environment such as Figure 1 As shown, the drain outlet 12 at the bottom of the barrel body 7 is close to the edge, and a controllable water outlet valve 15 is installed at the drain outlet 12, and no leakage will occur in the closed state. Figure 4 shown.

[0024] The minimum unit of the sub-barrel scale 2 and the main barrel scale 8 is 1 mm, which is convenient for reading.

[0025] The vacuum preloading system 301 includes a suction bottle 19, an air valve 17 and a vacuum gauge 16 located at the top of the bottle body, a fixing frame 18 for placing the suction bottle 19, a drainage plate 25 connected to the first conduit 21, and a vacuum pump 23 connected to the air valve 17 through a second conduit 22. The suction bottle 19 is placed on the fixing frame 18, and a support frame 20 for fixing the suction bottle 19 is arranged on the fixing frame 18. A slot 29 is arranged at the head of the first conduit 21, and one end of the drainage pipe 25 is stuck in the slot 29. Figure 7 As shown, the first conduit 21 penetrates through the geomembrane and goes deep into the sub-barrel body 1, and the other end of the drainage pipe 25 is inserted into the soft soil in the sub-barrel body 1.

[0026] The geotextile and geomembrane are fixed by the annular hoop, and the drainage pipe 25 is passed through the geomembrane and deep into the sub-barrel body 1, and the connection is tightened, so that the sub-barrel below the geotextile and geomembrane becomes a sealed and airtight environment. After the vacuum pump is started, the environment in the sub-barrel is in a vacuum as required by the test. Fig.10 shown.

[0027] The sub-barrel body 1, the annular groove 3, the hook 5, the tenon structure 6, the mother barrel body 7, the drain outlet 12, the mortise structure 9 and the filter bottle 19 are all made of transparent materials.

[0028] The pore pressure measurement system 401 includes a pore pressure gauge 27 and a vacuum gauge 24. The tip of the pore pressure gauge 27 is inserted on the drainage board 25 and inserted into the soil in the sub-barrel body 1 through the geomembrane. The probe of the vacuum gauge 24 is also inserted into the soil in the sub-barrel body 1 through the geomembrane. Fig.10 shown.

[0029] The ground temperature measurement system 501 includes a monitor 26 and a temperature sensor 28. The temperature sensor 28 is inserted into the soil in the sub-barrel body 1 through the geomembrane. Fig.10 shown.

[0030] In order to facilitate the understanding of the present invention, the following description is given in conjunction with the accompanying drawings during specific use; The equipment needs to be cleaned before the test begins to prevent stains on the experimental equipment from affecting the recording of test data. Check the connections between the various components to prevent water leakage, air leakage, or even falling apart during the experiment. Move the lower half of the mother barrel body 7 to the expected test position, and fix the four universal guide wheels at the bottom of the mother barrel body 7. Arrange silt soft soil, gravel piles, drainage boards, and various data measurement equipment in the sub-barrel body 1 according to the experimental design plan. After binding the drainage channel and the data transmission line of the measuring equipment, pass it through the pre-cut geotextile and geomembrane, and insert the geotextile and geomembrane into the annular groove 3 around the opening of the sub-barrel body 1 as shown in the figure. Fig.10 As shown. Turn on the vacuum pump 23, check whether the sub-barrel body 1 is in a sealed condition, and check whether there are any leaks. After the inspection is completed, connect the hook 5 on the outer wall of the sub-barrel body 1 and the crane hook with a rope, and hang the sub-barrel body 1 into the mother barrel body 7, connect the mortise structure 9 of the mother barrel body 7 with the tenon structure 6 of the sub-barrel body 1, and assemble the upper half of the mother barrel body 7 on the lower half after checking that it will not move. After checking that the drain port 12 at the bottom of the mother barrel body 7 is in a closed state, inject water into the mother barrel body 7 to the expected test height as shown in the figure below. Figure 1As shown, start the experiment. After the experiment, open the water outlet valve 15 at the bottom of the mother barrel body 7 to drain the water in the mother barrel body 7. Separate the upper and lower parts of the mother barrel body 7, disassemble the connection between the sub-barrel body 1 and the mother barrel body 7, and use the crane to lift the sub-barrel body 1 from the mother barrel body 7 to process the experimental results. After the data is recorded, dismantle the test equipment, clean the sub-barrel body 1 and the mother barrel body 7, and store them properly after cleaning.

[0031] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A comprehensive test simulation system for underwater soft foundation treatment based on gravel piles, characterized by: It includes a test sub-barrel (101), an experimental main barrel (201), a vacuum preloading system (301), a pore pressure measurement system (401) and a ground temperature measurement system (501); The test sub-barrel (101) comprises a sub-barrel body (1), an annular groove (3) connected to the top outer wall of the sub-barrel body (1), an annular outer hoop (4) above the annular groove (3), a hook (5) and a sub-barrel scale (2) arranged on the outer wall of the sub-barrel body (1), and a tenon structure (6) at the bottom of the sub-barrel body (1); The experimental mother barrel (201) comprises a mother barrel body (7), a mother barrel bottom plate (13) and a universal guide wheel (10) are installed at the bottom of the mother barrel body (7), a mother barrel scale (8) is arranged on the outer wall of the mother barrel body (7), a drainage port (12) at the bottom of the mother barrel body (7) near the edge, and a mortise structure (9) at the bottom of the mother barrel body (7); The vacuum pre-pressurization system (301) comprises a suction filtration bottle (19), an air valve (17) and a vacuum gauge (16) located at the top of the suction filtration bottle (19), a fixing frame (18) for placing the suction filtration bottle (19), a drainage plate (25) connected via a first conduit (21), and a vacuum pump (23) connected to the air valve (17) via a second conduit (22); The pore pressure measurement system (401) comprises a pore pressure gauge (27) and a vacuum gauge (24); The ground temperature measurement system (501) comprises a monitor (26) and a temperature sensor (28).

2. The underwater soft foundation treatment comprehensive test simulation system based on gravel piles according to claim 1 is characterized by: The sub-barrel body (1), the annular groove (3), the hook (5), the tenon structure (6), the main barrel body (7), the drain outlet (12), the mortise structure (9) and the filter bottle (19) are all made of transparent materials.

3. The underwater soft foundation treatment comprehensive test simulation system based on gravel piles according to claim 1 is characterized by: The annular outer hoop (4) can be inserted into the annular groove (3), and the inner wall of the annular groove (3) is tightly fitted with the outer wall of the annular outer hoop (4).

4. The underwater soft foundation treatment comprehensive test simulation system based on gravel piles according to claim 1 is characterized by: The minimum unit of the sub-barrel scale (2) and the main barrel scale (8) is 1 mm.

5. The underwater soft foundation treatment comprehensive test simulation system based on gravel piles according to claim 1 is characterized by: The mother barrel body (7) adopts a segmented design and is divided into detachable upper and lower structures, and the upper and lower structures are tightly connected by a snap-fit ​​structure (14).

6. The underwater soft foundation treatment comprehensive test simulation system based on gravel piles according to claim 1 is characterized by: A controllable water outlet valve (15) is installed at the water outlet (12).

7. The underwater soft foundation treatment comprehensive test simulation system based on gravel piles according to claim 1 is characterized by: The universal guide wheel (10) is connected to the mother barrel bottom plate (13) via screws, and a buckle (11) is provided on the universal guide wheel (10).

8. The underwater soft foundation treatment comprehensive test simulation system based on gravel piles according to claim 1 is characterized by: The suction filtration bottle (19) is placed on a fixing frame (18), and a support frame (20) for fixing the suction filtration bottle (19) is provided on the fixing frame (18).

9. The underwater soft foundation treatment comprehensive test simulation system based on gravel piles according to claim 1 is characterized by: The head of the first conduit (21) is provided with a slot (29), one end of the drainage pipe (25) is stuck in the slot (29), the first conduit (21) penetrates the geomembrane and penetrates into the sub-barrel body (1), and the other end of the drainage pipe (25) is inserted into the soil in the sub-barrel body (1).

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