Vacuumizing device for soft soil foundation

Abstract

The utility model provides a vacuumizing device for a soft soil foundation, and relates to the technical field of construction of soft soil foundations. The device comprises a communicating structure, the communicating structure comprises a vacuum pipe, a hand-shaped connecting device, a first vertical drainage plate, a second vertical drainage plate and an arc-shaped drainage plate, the bottom of the vacuum pipe is communicated with the top of the hand-shaped connecting device, and the bottom of the hand-shaped connecting device is fixedly connected with the top of the first vertical drainage plate; the bottom of the first vertical drainage plate, the arc-shaped drainage plate and the second vertical drainage plate are sequentially connected end to end to form a drainage area, and the second vertical drainage plate is arranged opposite to the vacuum pipe; the reinforcing device comprises an anti-breaking part and a pile shoe, the anti-breaking part is arranged on the inner arc surface of the arc-shaped drainage plate, the top of the pile shoe is fixedly connected with the outer arc surface of the arc-shaped drainage plate, and the bottom of the pile shoe is fixedly connected with the soft soil foundation. The device realizes zero attenuation of the vacuum degree from the deep part of the foundation to the drainage plate, and ensures the deep soft soil treatment effect.

Description

Technical Field

[0001] The utility model relates to the technical field of soft soil foundation construction, in particular to a vacuum extraction device used for soft soil foundation. Background Art

[0002] In the prior art, when vacuuming a soft soil foundation, a vacuum preloading method is often used, which is specifically: first laying a sand cushion layer on the surface of the soft soil foundation that needs to be reinforced or using a hand-shaped joint to achieve a sand-free cushion layer, then inserting a plastic drain board, and using an airtight sealing film to isolate it from the atmosphere, and finally using a vacuum pump or other vacuum means to evacuate the surface to form a negative pressure under the membrane and transfer it from the shallow layer to the deep layer of the foundation, thereby increasing the effective stress of the foundation. However, this method often has the problem of gradual attenuation of the vacuum degree on the drain board when used, resulting in a better treatment effect for the shallow soft soil of the foundation and a poor treatment effect for the deep soft soil. Therefore, there is an urgent need for a vacuum extraction device for soft soil foundations, which, on the basis of reverse vacuum extraction, can achieve zero attenuation of the vacuum degree from the depth of the foundation to the drain board, thereby ensuring the treatment effect of the deep soft soil. Utility Model Content

[0003] The purpose of the utility model is to provide a vacuum extraction device for soft soil foundation to improve the above problems. In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0004] A vacuum extraction device for soft soil foundation, the device comprising:

[0005] A communication structure, the communication structure comprising a vacuum tube, a hand-shaped connection device, a first vertical drain board, a second vertical drain board and an arc-shaped drain board, the bottom of the vacuum tube is communicated with the top of the hand-shaped connection device, the bottom of the hand-shaped connection device is fixedly connected to the top of the first vertical drain board, and the bottom of the first vertical drain board, the arc-shaped drain board and the second vertical drain board are sequentially connected end to end to form a drainage area, wherein the second vertical drain board is arranged opposite to the vacuum tube; and

[0006] A reinforcement device, comprising an anti-breakage piece and a pile shoe, wherein the anti-breakage piece is arranged on the inner arc surface of the arc-shaped drainage board, the top of the pile shoe is fixedly connected to the outer arc surface of the arc-shaped drainage board, and the bottom of the pile shoe is fixedly connected to the soft soil foundation.

[0007] Preferably, the hand-shaped connecting device includes a sleeve, a mounting base, a first arc-shaped clamping plate and a second arc-shaped clamping plate, the sleeve is arranged on the top of the mounting base, the outer wall surface of the sleeve is clamped and fixed with the bottom of the vacuum tube, the first arc-shaped clamping plate and the second arc-shaped clamping plate are arranged at the bottom of the mounting base, and a clamping cavity is arranged between the first arc-shaped clamping plate and the second arc-shaped clamping plate, an exhaust hole is arranged in the mounting base, the inner cavity of the sleeve and the exhaust hole are connected with the clamping cavity, and the clamping cavity is clamped and fixed with the first vertical drainage board.

[0008] Preferably, a first positioning groove is provided on the inner wall surface of the first arc-shaped clamping plate, a second positioning groove is provided on the inner wall surface of the second arc-shaped clamping plate, and a first protrusion and a second protrusion are respectively provided on the side walls of both sides of the first vertical drainage plate, the first protrusion is slidably connected to the first positioning groove, and the second protrusion is slidably connected to the second positioning groove.

[0009] Preferably, the mounting base is provided with a first positioning hole, and the first vertical drainage board is provided with a second positioning hole. When the first protrusion is slidably connected with the first positioning groove, and the second protrusion is slidably connected with the second positioning groove, the first positioning hole and the second positioning hole are fixed by a pin.

[0010] Preferably, a rubber buffer layer is provided on the cavity wall of the clamping cavity.

[0011] Preferably, it includes a metal conduit for a plate plugging machine, and a pile shoe connecting hole is provided at the bottom of the metal conduit for the plate plugging machine. When the plate plugging machine is under construction, the connecting structure and the reinforcement device are both arranged in the metal conduit for the plate plugging machine, wherein the vertical connecting rod of the pile shoe passes through the pile shoe connecting hole and is fixedly connected to the outer arc surface of the arc-shaped drainage board.

[0012] Preferably, a force transmission rod is included, and a force transmission rod connecting hole is provided in the middle of the anti-breakage member. When manual construction is performed, the force transmission rod is fixedly connected to the force transmission rod connecting hole.

[0013] Preferably, the pile shoe includes a horizontal connecting rod and a vertical connecting rod, the horizontal connecting rod is used to be inserted into the soft soil foundation, the bottom of the vertical connecting rod is fixedly connected to the horizontal connecting rod, and the top of the vertical connecting rod is fixedly connected to the outer curved surface of the curved drainage board.

[0014] Preferably, the diameter of the vacuum tube is 25 mm.

[0015] Preferably, the anti-breakage member is a semi-cylinder.

[0016] The beneficial effects of the utility model are:

[0017] The device introduces a connecting structure and a reinforcement device, in which a first vertical drain board, a second vertical drain board and an arc-shaped drain board are arranged in the connecting structure, and an anti-breakage piece is arranged on the inner arc surface of the arc-shaped drain board. At this time, on the one hand, a small radius fillet folding of the drain board in a local area is realized, and on the other hand, a stable connection between the drain board and the vacuum tube deep in the foundation is guaranteed, thereby improving the shear strength of the deep foundation soil, thereby greatly reducing the post-construction settlement, and realizing zero attenuation of the vacuum degree from the deep foundation to the drain board, ensuring the deep soft soil treatment effect, and making vacuum preloading more widely used in the railway field; in addition, the device is easy to carry out construction operation.

[0018] Other features and advantages of the present invention will be described in the following description, and some of them will become obvious from the description or be understood by implementing the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the overall structure of the utility model when the plate inserting machine is used for construction;

[0021] Figure 2 This is a schematic diagram of the overall structure of the utility model when manual construction is adopted;

[0022] Figure 3 This is a schematic diagram of the structure of the hand-shaped connecting device of the utility model;

[0023] Figure 4 Based on Figure 3 A schematic cross-sectional structure diagram of the central plane of the hand-shaped connecting device;

[0024] Figure 5 It is a schematic diagram of the structure of the first protrusion and the second protrusion of the utility model;

[0025] Figure 6 It is a schematic diagram of the cross-sectional structure of the first vertical drainage board of the utility model;

[0026] Markings in the figure:

[0027] 11. Vacuum tube; 12. Hand-shaped connecting device; 13. First vertical drain plate; 14. Second vertical drain plate; 15. Arc-shaped drain plate; 100. Clamping cavity; 101. Exhaust hole; 131. First protrusion; 132. Second protrusion; 21. Anti-breakage member; 22. Pile shoe; 121. Casing; 122. Mounting base; 123. First arc-shaped clamping plate; 124. Second arc-shaped clamping plate; 125. First positioning groove; 126. Second positioning groove; 127. First positioning hole; 128. Second positioning hole; 210. Force transfer rod connecting hole; 3. Metal conduit of plug-in machine; 4. Force transfer rod. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0029] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present utility model, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0030] Embodiment 1:

[0031] like Figure 1 to Figure 2 As shown, a vacuum extraction device for soft soil foundation comprises:

[0032] A communication structure, the communication structure comprising a vacuum tube 11, a hand-shaped connection device 12, a first vertical drain board 13, a second vertical drain board 14 and an arc-shaped drain board 15, the bottom of the vacuum tube 11 is communicated with the top of the hand-shaped connection device 12, the bottom of the hand-shaped connection device 12 is fixedly connected with the top of the first vertical drain board 13, and the bottom of the first vertical drain board 13, the arc-shaped drain board 15 and the second vertical drain board 14 are sequentially connected end to end to form a drainage area, wherein the second vertical drain board 14 is arranged opposite to the vacuum tube 11; and

[0033] The reinforcement device includes an anti-breakage member 21 and a pile shoe 22. The anti-breakage member 21 is arranged on the inner arc surface of the arc-shaped drainage board 15. The top of the pile shoe 22 is fixedly connected to the outer arc surface of the arc-shaped drainage board 15, and the bottom of the pile shoe 22 is fixedly connected to the soft soil foundation.

[0034] When the device is under construction, it can be combined with the plug-in machine construction or manual construction in the later stage. The top of the vacuum tube 11 is used to connect with the external vacuum machine. The device is inserted into the foundation through the pile shoe 22 in the reinforcement device, and the plugging is cyclically driven and vacuumed by the external vacuum machine. The device makes the goal of reverse vacuuming easier to achieve and the construction is more convenient, so that the problem of vacuum degree attenuation with depth during positive vacuum preloading is solved, which greatly improves the reinforcement effect of deep soft soil.

[0035] In addition, since the device can enhance the soft soil treatment effect, the use of cement mixing piles is greatly reduced, material costs can be effectively saved, and the effect of controlling post-construction settlement of the roadbed is better.

[0036] In order to clarify the specific structure of the anti-breakage member 21, the anti-breakage member 21 is a semi-cylinder. At this time, the drain plate realizes a 180-degree small radius rounded corner fold in a local area.

[0037] like Figure 3 to Figure 4 As shown, in the present device, in order to clarify the specific structure of the hand-shaped connecting device 12, the hand-shaped connecting device 12 includes a sleeve 121, a mounting base 122, a first arc-shaped clamping plate 123 and a second arc-shaped clamping plate 124, the sleeve 121 is arranged at the top of the mounting base 122, the outer wall surface of the sleeve 121 is clamped and fixed with the bottom of the vacuum tube 11, the first arc-shaped clamping plate 123 and the second arc-shaped clamping plate 124 are arranged at the bottom of the mounting base 122, and a clamping cavity 100 is arranged between the first arc-shaped clamping plate 123 and the second arc-shaped clamping plate 124, an exhaust hole 101 is arranged in the mounting base 122, the inner cavity of the sleeve 121 and the exhaust hole 101 are connected with the clamping cavity 100, and the clamping cavity 100 is clamped and fixed with the first vertical drainage plate 13.

[0038] Preferably, a first positioning groove 125 is provided on the inner wall surface of the first arc-shaped clamping plate 123, and a second positioning groove 126 is provided on the inner wall surface of the second arc-shaped clamping plate 124;

[0039] like Figure 5As shown, the first vertical drain plate 13 is provided with a first protrusion 131 and a second protrusion 132 on both side walls, respectively. The first protrusion 131 is slidably connected to the first positioning groove 125, and the second protrusion 132 is slidably connected to the second positioning groove 126. In this structure, the first vertical drain plate 13 is stably connected to the corresponding arc-shaped clamping plate and is not easily misaligned.

[0040] like Figure 3 and Figure 6 As shown, in the utility model, in order to strengthen the positioning relationship between the first vertical drain plate 13 and the hand-shaped connecting device 12, the mounting base 122 is provided with a first positioning hole 127, and the first vertical drain plate 13 is provided with a second positioning hole 128. When the first protrusion 131 is slidably connected with the first positioning groove 125, and the second protrusion 132 is slidably connected with the second positioning groove 126, the first positioning hole 127 and the second positioning hole 128 are fixed by a pin.

[0041] In this device, in order to avoid rigid contact between structures to destroy the sealing effect, a rubber buffer layer is provided on the cavity wall of the clamping cavity 100. When the first vertical drainage board 13 is connected, the rubber buffer layer is first squeezed and then snap-fitted and fixed in the clamping cavity 100.

[0042] When the device is applied to the construction of a plug-in machine, it includes a metal conduit 3 of the plug-in machine, and a pile shoe connecting hole is arranged at the bottom of the metal conduit 3 of the plug-in machine. When the plug-in machine is under construction, the connecting structure and the reinforcement device are both arranged in the metal conduit 3 of the plug-in machine, wherein the vertical connecting rod of the pile shoe 22 passes through the pile shoe connecting hole and is fixedly connected to the outer arc surface of the arc drainage board 15.

[0043] When the device is applied to manual construction, it includes a force transmission rod 4, and a force transmission rod connecting hole 210 is provided in the middle of the anti-breakage member 21. When manual construction is performed, the force transmission rod 4 is fixedly connected to the force transmission rod connecting hole 210.

[0044] Preferably, the pile shoe 22 includes a horizontal connecting rod and a vertical connecting rod, the horizontal connecting rod is used to be inserted into the soft soil foundation, the bottom of the vertical connecting rod is fixedly connected to the horizontal connecting rod, and the top of the vertical connecting rod is fixedly connected to the outer arc surface of the arc drainage board 15.

[0045] In order to ensure a good vacuuming effect, the diameter of the vacuum tube 11 is selected to be 25 mm.

[0046] The utility model is convenient for performing reverse vacuuming operation in the deep layer of soft soil foundation on the basis of forward vacuuming, and its main functions include:

[0047] (1) It acts as densely distributed precipitation wells, lowering the groundwater level, increasing the effective stress of the foundation soil and improving its strength;

[0048] (2) To supplement the phenomenon of vacuum preloading vacuum attenuation, increase the deep vacuum degree, enhance the deep soft soil treatment effect, and thus reduce the post-construction settlement of the roadbed;

[0049] (3) Bidirectional drainage and consolidation of soft soil is achieved;

[0050] (4) Adding reverse vacuum pumping operation on the basis of positive vacuum pre-pressure is equivalent to expanding the distribution range of vacuum negative pressure and playing a pressurizing role.

[0051] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0052] The above description is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present invention, which should be included in the protection scope of the present invention.

Claims

1. A vacuum extraction device for soft soil foundation, characterized in that: include: A communication structure, the communication structure comprising a vacuum tube (11), a hand-shaped connection device (12), a first vertical drainage board (13), a second vertical drainage board (14) and an arc-shaped drainage board (15), the bottom of the vacuum tube (11) being connected to the top of the hand-shaped connection device (12), the bottom of the hand-shaped connection device (12) being fixedly connected to the top of the first vertical drainage board (13), and the bottom of the first vertical drainage board (13), the arc-shaped drainage board (15) and the second vertical drainage board (14) being connected end to end in sequence to form a drainage area, wherein the second vertical drainage board (14) is arranged opposite to the vacuum tube (11); as well as A reinforcement device, the reinforcement device comprising an anti-breakage piece (21) and a pile shoe (22), the anti-breakage piece (21) being arranged on the inner arc surface of the arc-shaped drainage board (15), the top of the pile shoe (22) being fixedly connected to the outer arc surface of the arc-shaped drainage board (15), and the bottom of the pile shoe (22) being fixedly connected to the soft soil foundation.

2. A vacuum extraction device for soft soil foundation according to claim 1, characterized in that: The hand-shaped connecting device (12) comprises a sleeve (121), a mounting base (122), a first arc-shaped clamping plate (123) and a second arc-shaped clamping plate (124); the sleeve (121) is arranged at the top of the mounting base (122); the outer wall surface of the sleeve (121) is clamped and fixed with the bottom of the vacuum tube (11); the first arc-shaped clamping plate (123) and the second arc-shaped clamping plate (124) are arranged at the bottom of the mounting base (122); a clamping cavity (100) is arranged between the first arc-shaped clamping plate (123) and the second arc-shaped clamping plate (124); an exhaust hole (101) is arranged in the mounting base (122); the inner cavity of the sleeve (121) and the exhaust hole (101) are connected to the clamping cavity (100); and the clamping cavity (100) is clamped and fixed with the first vertical drainage plate (13).

3. A vacuum extraction device for soft soil foundation according to claim 2, characterized in that: A first positioning groove (125) is provided on the inner wall surface of the first arc-shaped clamping plate (123), a second positioning groove (126) is provided on the inner wall surface of the second arc-shaped clamping plate (124), and a first protrusion (131) and a second protrusion (132) are respectively provided on the side walls of both sides of the first vertical drainage plate (13), the first protrusion (131) is slidably connected to the first positioning groove (125), and the second protrusion (132) is slidably connected to the second positioning groove (126).

4. A vacuum extraction device for soft soil foundation according to claim 3, characterized in that: The mounting base (122) is provided with a first positioning hole (127), and the first vertical drainage plate (13) is provided with a second positioning hole (128). When the first protrusion (131) is slidably connected to the first positioning groove (125), and the second protrusion (132) is slidably connected to the second positioning groove (126), the first positioning hole (127) and the second positioning hole (128) are fixed by a latch.

5. A vacuum extraction device for soft soil foundation according to claim 2, characterized in that: A rubber buffer layer is provided on the cavity wall of the clamping cavity (100).

6. A vacuum extraction device for soft soil foundation according to claim 1, characterized in that: It comprises a plate inserter metal conduit (3), the bottom of which is provided with a pile shoe connection hole. When the plate inserter is under construction, the connecting structure and the reinforcement device are both arranged in the plate inserter metal conduit (3), wherein the vertical connecting rod of the pile shoe (22) passes through the pile shoe connection hole and is fixedly connected to the outer arc surface of the arc-shaped drainage board (15).

7. The vacuum extraction device for soft soil foundation according to claim 1, characterized in that: It comprises a force transmission rod (4), a force transmission rod connection hole (210) is arranged in the middle of the anti-breakage piece (21), and when manual construction is performed, the force transmission rod (4) is fixedly connected to the force transmission rod connection hole (210).

8. The vacuum extraction device for soft soil foundation according to claim 1, characterized in that: The pile shoe (22) comprises a horizontal connecting rod and a vertical connecting rod, wherein the horizontal connecting rod is used to be inserted into a soft soil foundation, the bottom of the vertical connecting rod is fixedly connected to the horizontal connecting rod, and the top of the vertical connecting rod is fixedly connected to the outer arc surface of the arc-shaped drainage board (15).

9. The vacuum extraction device for soft soil foundation according to claim 1, characterized in that: The diameter of the vacuum tube (11) is 25 mm.

10. A vacuum extraction device for soft soil foundation according to any one of claims 1 to 9, characterized in that: The anti-breakage piece (21) is a semi-cylinder.

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