Vacuum preloading device for soft soil foundation

Abstract

The utility model provides a vacuum preloading device for a soft soil foundation, which belongs to the technical field of foundation treatment and comprises a plurality of drain boards, a vacuum tube, a water-gas separator, an air pump and a water pump. The vacuum pipe is connected with the drainage plate; the water-gas separator is provided with an inlet, a water outlet and an exhaust port, and the inlet is connected with the vacuum pipe; the air pump is connected with the exhaust port so as to exhaust gas in the water-gas separator; and the water pump is connected with the water outlet so as to discharge water in the water-gas separator. The protection plate is arranged at the top end of the drainage plate, so that the possibility that the vacuum sealing film is punctured by the drainage plate can be reduced; by arranging the water-gas separator, the air pump and the water pump, water-gas separation can be carried out on a water-gas mixture sucked out by the vacuum pipe, the special air pump is used for exhausting, the special water pump is used for draining water, the possibility that construction is stopped due to damage of the air pump and the water pump is reduced, and the vacuum preloading efficiency can be guaranteed and improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of foundation treatment, and more specifically relates to a vacuum preloading device for soft soil foundation. Background Art

[0002] Soft soil layers are often encountered in engineering construction. In projects such as riverside, lakeside and coastal tidal flat development and land reclamation, the soft soil layer has a large water content and its engineering mechanical properties are extremely poor. When buildings are directly constructed or backfilled on the soft soil foundation, the foundation will produce large settlement and settlement differences due to consolidation and shear deformation, and the settlement will last for a long time, which may affect the normal use of the building. In addition, due to its low strength, the foundation bearing capacity and stability often cannot meet the engineering requirements, resulting in foundation soil damage. Therefore, vacuum preloading foundation treatment is required.

[0003] At present, the main steps of vacuum preloading treatment for soft soil foundation include measurement and positioning, site leveling, laying sand cushion layer, installing drainage board, laying vacuum pipe and vacuum pump, digging sealing ditch, burying monitoring instruments, laying vacuum membrane, connecting vacuum equipment, vacuum loading and stopping pumping and unloading after meeting the unloading standard. However, during construction, due to soil settlement and vacuum adsorption, the vacuum sealing membrane is easily punctured by the drainage board. Moreover, since the vacuum pump is used directly to discharge the air and water together, the vacuum pump has poor vacuuming effect in the initial stage of drainage and is easily damaged after long-term use, which can easily affect the construction progress. Utility Model Content

[0004] The utility model aims to provide a vacuum preloading device for soft soil foundation, so as to solve the technical problems existing in the prior art that the vacuum sealing film is easily punctured by the drainage board and the vacuum pump is damaged, resulting in a significant impact on the construction progress.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a vacuum preloading device for a soft soil foundation, including multiple drain plates, vacuum tubes, water-gas separators, air pumps and water pumps, and protective plates are provided on the tops of the multiple drain plates; the vacuum tubes are connected to the drain plates; the water-gas separator is provided with an inlet, a drain port and an exhaust port, and the inlet is connected to the vacuum tube; the air pump is connected to the exhaust port to discharge the gas in the water-gas separator; the water pump is connected to the drain port to discharge the water in the water-gas separator.

[0006] In combination with the above technical solution, in a possible implementation, the water-gas separator includes a cylinder, the inlet and the exhaust port are arranged at the upper part of the cylinder, and the drain port is arranged at the lower part of the cylinder.

[0007] In combination with the above technical solution, in a possible implementation, a water baffle is provided in the cylinder, and the water baffle is provided at the inlet.

[0008] In combination with the above technical solution, in a possible implementation, a defogger assembly is provided in the cylinder, and the defogger assembly is provided at the exhaust port.

[0009] In combination with the above technical solution, in a possible implementation, the defogger assembly includes a plurality of defogger tubes, and the plurality of defogger tubes are arranged in an array on the upper portion of the cylinder, and each defogger tube is arranged vertically.

[0010] In combination with the above technical solution, in a possible implementation, a plurality of through holes are provided on the side wall of the demister pipe.

[0011] In combination with the above technical solution, in a possible implementation method, a liquid level detection module is provided on the cylinder, and the soft soil foundation vacuum preloading device also includes a controller, which is electrically connected to the liquid level detection module, the air pump and the water pump respectively to control the opening and closing of the air pump and the water pump according to the liquid level in the cylinder detected by the liquid level detection module.

[0012] In combination with the above technical solution, in a possible implementation method, a slide plate and a floating plate are provided in the cylinder. The slide plate is vertically slidably arranged in the cylinder and can cover the exhaust port when sliding to the highest position and can cover the drain port when sliding to the lowest position; the floating plate is connected to the slide plate.

[0013] In combination with the above technical solution, in a possible implementation, a sand cleaning gate is also provided on the cylinder; and a control valve is provided on the vacuum tube.

[0014] In combination with the above technical solution, in a possible implementation method, the protective plate is connected to the top of the drain board through a clamping structure, and a transfer tube is provided at the bottom of the protective plate, which is respectively connected to the drain board and the vacuum tube so that the vacuum tube is located below the protective plate.

[0015] The beneficial effects of the soft soil foundation vacuum preloading device provided by the utility model are as follows: compared with the prior art, the utility model can reduce the possibility of the vacuum sealing film being punctured by the drainage board by arranging a protective plate on the top of the drainage board; and by arranging a water-gas separator, an air pump and a water pump, the water-gas mixture sucked out of the vacuum tube can be separated into water and gas, and the air is exhausted by a special air pump, and the water is drained by a special water pump, which reduces the possibility of construction being stopped due to damage to the air pump and the water pump, and is conducive to ensuring and improving the efficiency of vacuum preloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of the structure of a vacuum preloading device for soft soil foundation provided by an embodiment of the utility model;

[0018] Figure 2 A schematic structural diagram of a water-gas separator of a soft soil foundation vacuum preloading device provided by an embodiment of the utility model;

[0019] Figure 3 A schematic structural diagram of the protective plate portion of a vacuum preloading device for soft soil foundation provided in an embodiment of the utility model.

[0020] Among them, the reference numerals in the figures are as follows:

[0021] 10. Drain board; 11. Protective plate; 12. Transfer tube; 20. Vacuum tube; 21. Control valve;

[0022] 30. Water-gas separator; 31. Inlet; 32. Drain outlet; 33. Exhaust outlet; 34. Cylinder;

[0023] 35. Water baffle; 36. Demisting pipe; 37. Liquid level detection module; 38. Slide plate; 39. Floating plate;

[0024] 40. Air pump; 50. Water pump. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are only part of the embodiments of the present application, not all of the embodiments, and the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0026] It should be further explained that the drawings and implementation modes of the present invention mainly describe the concept of the present invention. On the basis of this concept, some specific forms and settings of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, on the premise that those skilled in the art understand the concept of the present invention, those skilled in the art can implement the above-mentioned specific forms and settings in a well-known manner.

[0027] When an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element. In the description of the present utility model, "plurality" means two or more, and "several" means one or more, unless otherwise clearly and specifically defined.

[0028] The soft soil foundation vacuum preloading device provided by the utility model is now described.

[0029] like Figure 1 and Figure 2 As shown, the vacuum preloading device for soft soil foundation provided by the first embodiment of the utility model includes multiple drainage boards 10, vacuum tubes 20, moisture separators 30, air pumps 40 and water pumps 50, and the tops of the multiple drainage boards 10 are provided with protective plates 11; the vacuum tubes 20 are connected to the drainage boards 10; the moisture separator 30 is provided with an inlet 31, a drain port 32 and an exhaust port 33, and the inlet 31 is connected to the vacuum tube 20; the air pump 40 is connected to the exhaust port 33 to discharge the gas in the moisture separator 30; the water pump 50 is connected to the drain port 32 to discharge the water in the moisture separator 30.

[0030] During construction, after the steps of measuring and positioning, leveling the site, laying a sand cushion layer, installing drainage boards, laying vacuum pipes, digging sealing trenches, burying monitoring instruments, and laying vacuum membranes, the water-gas separator 30, air pump 40, and water pump 50 are firmly installed, and then the water-gas separator 30 is connected to the vacuum pipe 20, air pump 40, and water pump 50 respectively. Then, the air pump 40 and water pump 50 are controlled to open and close to perform vacuum loading until the unloading standard is met and the vacuum loading is stopped.

[0031] Compared with the prior art, the soft soil foundation vacuum preloading device provided in the present embodiment can reduce the possibility of the vacuum sealing film being punctured by the drainage board 10 by providing a protective plate 11 at the top of the drainage board 10; and by providing a water-gas separator 30, an air pump 40 and a water pump 50, the water-gas mixture sucked out of the vacuum tube 20 can be separated into water and gas, and the air can be exhausted by a special air pump 40, while the water can be discharged by a special water pump 50, thereby reducing the possibility of construction being stopped due to damage of the air pump 40 and the water pump 50, and is conducive to ensuring and improving the efficiency of vacuum preloading.

[0032] like Figures 1 to 3 As shown, the utility model provides a specific implementation method based on the first implementation method as follows:

[0033] like Figure 2 As shown, the water-gas separator 30 includes a cylinder 34 , an inlet and an exhaust port are arranged at the upper part of the cylinder 34 , and a drain port is arranged at the lower part of the cylinder 34 .

[0034] like Figure 2 As shown, a water baffle 35 is provided in the cylinder 34 , and the water baffle 35 is provided at the inlet 31 to prevent water entering the inlet 31 from directly entering the exhaust port 33 .

[0035] like Figure 2 As shown, a demisting assembly is provided in the cylinder 34 , and the demisting assembly is provided at the exhaust port 33 to remove water mist in the gas entering through the inlet 31 .

[0036] like Figure 2 As shown, the defogger assembly includes a plurality of defogger tubes 36, which are arranged in an array on the upper part of the cylinder 34, and each defogger tube 36 is arranged vertically so that when the gas passes through, it collides with the defogger tube 36, so that water in the gas adheres to the defogger tube 36, gathers into water droplets and drips along the defogger tube 36.

[0037] like Figure 2 As shown, a plurality of through holes are provided on the side wall of the demister pipe 36 to increase the contact area with the gas and improve the water removal effect.

[0038] like Figure 2 As shown, in some embodiments, a liquid level detection module 37 is provided on the cylinder 34, and the soft soil foundation vacuum preloading device also includes a controller, which is electrically connected to the liquid level detection module 37, the air pump 40 and the water pump 50 respectively to control the opening and closing of the air pump 40 and the water pump 50 according to the liquid level in the cylinder 34 detected by the liquid level detection module 37.

[0039] Specifically, when the liquid level in the cylinder 34 detected by the liquid level detection module 37 is lower than the first rated value range, the air pump 40 is controlled to be opened or remain opened and the water pump 50 is controlled to be closed; when the liquid level in the cylinder 34 detected by the liquid level detection module 37 is between the first rated value range and the second value range, the air pump 40 is controlled to be opened and the water pump 50 is controlled to be opened; when the liquid level in the cylinder 34 detected by the liquid level detection module 37 is higher than the first rated value range, the air pump 40 is controlled to be closed and the water pump 50 is controlled to be opened or remain opened.

[0040] like Figure 2As shown, in some embodiments, a slide plate 38 and a floating plate 39 are provided in the cylinder 34. The slide plate 38 is vertically slidably arranged in the cylinder 34, and can cover the exhaust port 33 when sliding to the highest position, and can cover the drain port 32 when sliding to the lowest position; the floating plate 39 is connected to the slide plate 38, so as to drive the slide plate 38 to move up and down under the buoyancy of water. With this structure, when the water level in the cylinder 34 reaches a higher value, the exhaust port 33 can be directly blocked to reduce the exhaust volume, prevent the water level from continuing to rise, and prevent water from entering the exhaust port 33; and when the water level in the cylinder 34 reaches a lower value, the drain port 32 can be directly blocked to reduce the drainage volume, prevent the water level from continuing to drop, and prevent gas from entering the drain port 32.

[0041] The cylinder 34 is also provided with a sand cleaning door to clean the sand and other impurities gathered in the cylinder 34.

[0042] like Figure 1 As shown, a control valve 21 is provided on the vacuum tube 20 so that when the cylinder 34 needs to be cleaned, the control valve 21 is closed to prevent backflow in the vacuum tube 20.

[0043] The protective plate 11 is connected to the top of the drain plate 10 through a snap-on structure, so that the protective plate 11 can be installed after the drain plate 10 is driven into the soil, thereby preventing the protective plate 11 from being damaged during construction.

[0044] like Figure 3 As shown, a transfer tube 12 is provided at the lower part of the protective plate 11, and the transfer tube 12 is respectively connected to the drainage plate 10 and the vacuum tube 20, so that the vacuum tube 20 is located below the protective plate 11, so that the protective plate 11 can be directly supported on the vacuum sealing film.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vacuum preloading device for soft soil foundation, characterized in that: include: A plurality of drainage plates (10) with a protective plate (11) provided on the top; A vacuum tube (20) connected to the drainage board (10); A water-gas separator (30) is provided with an inlet (31), a water outlet (32) and an air outlet (33), and the inlet (31) is connected to the vacuum tube (20); an air pump (40) connected to the exhaust port (33) to exhaust the gas in the water-gas separator (30); A water pump (50) is connected to the water outlet (32) to discharge water in the water-gas separator (30).

2. The soft soil foundation vacuum preloading device according to claim 1, characterized in that: The water-gas separator (30) comprises a cylinder (34), the inlet (31) and the exhaust port (33) are arranged at the upper part of the cylinder (34), and the drain port (32) is arranged at the lower part of the cylinder (34).

3. The soft soil foundation vacuum preloading device according to claim 2, characterized in that: A water baffle (35) is provided in the cylinder (34), and the water baffle (35) is provided at the inlet (31).

4. The soft soil foundation vacuum preloading device according to claim 2 or 3, characterized in that: A demisting component is provided in the cylinder (34), and the demisting component is arranged at the exhaust port (33).

5. The soft soil foundation vacuum preloading device according to claim 4, characterized in that: The demisting assembly comprises a plurality of demisting pipes (36), the plurality of demisting pipes (36) being arranged in an array on the upper part of the cylinder (34), and each of the demisting pipes (36) being arranged vertically.

6. The soft soil foundation vacuum preloading device according to claim 5, characterized in that: A plurality of through holes are provided on the side wall of the demisting pipe (36).

7. The soft soil foundation vacuum preloading device according to claim 2, characterized in that: The cylinder (34) is provided with a liquid level detection module (37). The soft soil foundation vacuum preloading device further comprises a controller, the controller being electrically connected to the liquid level detection module (37), the air pump (40) and the water pump (50) respectively, so as to control the opening and closing of the air pump (40) and the water pump (50) according to the liquid level in the cylinder (34) detected by the liquid level detection module (37).

8. The soft soil foundation vacuum preloading device according to claim 2, characterized in that: A slide plate (38) and a floating plate (39) are provided in the cylinder (34); the slide plate (38) is vertically slidably arranged in the cylinder (34) and is capable of covering the exhaust port (33) when sliding to the highest position and of covering the drain port (32) when sliding to the lowest position; the floating plate (39) is connected to the slide plate (38).

9. The soft soil foundation vacuum preloading device according to claim 2, characterized in that: The cylinder (34) is also provided with a sand cleaning gate; and the vacuum tube (20) is provided with a control valve (21).

10. The soft soil foundation vacuum preloading device according to claim 1, characterized in that: The protective plate (11) is connected to the top of the drain plate (10) via a clamping structure, and a transfer tube is provided at the bottom of the protective plate (11), the transfer tube being respectively connected to the drain plate (10) and the vacuum tube (20), so that the vacuum tube (20) is located below the protective plate (11).

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