Movable soil compaction device based on vacuum preloading technology

Abstract

The utility model discloses a movable soil compaction device based on a vacuum preloading technology. The device comprises a sand layer laid on the top of to-be-compacted soil, fixing blocks are fixed to the sand layer, a sealing film is attached to the surfaces of the fixing blocks, the sealing film extends to the surface of the sand layer on the top of the to-be-compacted soil, a fixing mechanism is arranged at the position, corresponding to the top ends of the fixing blocks, of the upper side of the sealing film, and an insertion pipe is fixed into each fixing block; a drainage pipe capable of freely moving is arranged in the insertion pipe in a sleeved mode, an O-shaped ring is embedded in the outer wall of the drainage pipe, and the O-shaped ring is attached to the inner wall of the insertion pipe; the top end of each drainage pipe is communicated with a connecting pipe, each connecting pipe is communicated with a branch pipe, each branch pipe is provided with a negative pressure meter and a valve, and all the branch pipes are jointly communicated with a negative pressure pipe used for vacuum suction. The drainage pipe is arranged to be movable, and when the drainage pipe is blocked, the drainage pipe can be maintained or replaced in time.

Description

Technical Field

[0001] The utility model relates to the technical field of soil improvement, in particular to a movable soil compacting device based on vacuum preloading technology. Background Art

[0002] For soft soil and loose soil with high water content, vacuum preloading is often used to improve its looseness. The vacuum preloading method is to first lay a sand cushion layer on the surface of the loose soil, then bury a vertical drainage pipe, and then use an airtight sealing membrane to isolate the sand cushion layer and loose soil from the atmosphere. Use a vacuum pump or other vacuum means to evacuate the drainage pipe, so that the loose soil around the drainage pipe forms a negative pressure under the membrane, thereby improving the looseness of the soil and achieving the purpose of reinforcement.

[0003] A three-dimensional disturbance vacuum preloading foundation treatment system (publication number CN214219623U) in China's patent can achieve the beneficial effect of strengthening the soil through the structure of the existing technology, but it still has the following defects:

[0004] Although the air and moisture in the soil can be vacuum-extracted through the vertical drainage pipe, the drainage pipes in the prior art are fixed and cannot be moved during use. Under the action of negative pressure, the filter mesh holes of the drainage pipes will become clogged, and the fixed and immovable drainage pipes cannot be cleaned or replaced after being clogged, which affects the subsequent vacuum preloading. Summary of the invention

[0005] In view of the shortcomings of the prior art, the utility model proposes a movable soil compacting device based on vacuum preloading technology. When the drainage pipe is blocked under the action of negative pressure, the movable drainage pipe can be replaced and repaired at any time to ensure the subsequent vacuum preloading.

[0006] In order to achieve the above-mentioned purpose, the utility model is designed to be a movable soil compacting device based on vacuum preloading technology, including a sand layer laid on the top of the soil to be compacted, and its special features are:

[0007] A plurality of fixed blocks arranged at intervals are fixed on the sand layer, a sealing film matching the surface shape of the fixed block is attached to the surface of the fixed block, and the sealing film extends to the surface of the sand layer on the top of the soil to be compacted, and a fixing mechanism for sealing and fixing the sealing film is provided corresponding to the upper side of the sealing film at the top of the fixed block, so that the sand layer on the top of the soil to be compacted is isolated from the outside atmosphere;

[0008] A plug is fixed inside each of the fixing blocks, and the upper end of the plug extends to the top of the fixing mechanism, and the lower end passes through the sand layer and extends to the soil to be compacted; a freely movable drainage pipe is sleeved inside the plug, and the upper end of the drainage pipe extends to the top of the plug, and the lower end extends to the soil to be compacted; an O-ring is embedded in the outer wall of the drainage pipe, and the O-ring fits the inner wall of the plug, so that the drainage pipe and the plug are kept sealed;

[0009] The top of each drainage pipe is connected to a connecting pipe, each connecting pipe is connected to a branch pipe, each branch pipe is installed with a negative pressure gauge and a valve, and all the branch pipes are commonly connected to a negative pressure pipe for vacuum suction.

[0010] Furthermore, a plurality of vertically arranged countersunk holes are provided on the edge of the fixing block, anchor bolts are arranged in the countersunk holes, and the anchor bolts extend through the sand layer to the soil to be compacted.

[0011] Furthermore, the surface of the fixing block is sloped and smoothly transitions to the sand layer.

[0012] Furthermore, the fixing mechanism includes a plurality of studs arranged around the insert pipe, and each stud is fixed to the top of the fixing block; a pressure ring matching the surface of the fixing block is sleeved on all the studs, and the pressure ring is arranged along the periphery of the insert pipe; a locking nut is threadedly connected to the top of each stud, and the locking nut abuts against the pressure ring;

[0013] The fixing mechanism also includes a sealing groove arranged around the fixing block, a sealing film and a sealing ring are embedded in the sealing groove, and the sealing film is located at the bottom end of the sealing ring, and the sealing ring is fixedly connected to the bottom end of the pressure ring.

[0014] Furthermore, the longitudinal sections of the sealing groove and the bottom of the sealing ring are both semicircular structures.

[0015] Furthermore, a nut ring is rotatably clamped on the top edge of the drain pipe, and the nut ring is threadedly sleeved on the top of the insert pipe.

[0016] Furthermore, a filter screen and a filter cloth are arranged at the bottom end of the drain pipe.

[0017] Furthermore, a plurality of O-rings are embedded in the outer wall of the drain pipe.

[0018] The advantages of the utility model are:

[0019] 1. The utility model lays the sealing film on the top of the sand layer and the surface of the fixed block, and compacts and seals the sealing film in the sealing groove on the surface of the fixed block through the sealing ring on the fixing mechanism, thereby ensuring that the sand layer and the soil to be compacted are isolated from the outside atmosphere;

[0020] 2. The utility model sets a fixedly connected cannula inside the fixed block, and then sets a freely movable drainage pipe inside the cannula, and the cannula is sealed by an O-ring embedded in the outer wall of the drainage pipe, so as to ensure that the inside of the cannula is disconnected from the outside air during pinhole suction;

[0021] 3. The utility model rotates the clamping nut ring at the top edge of the drain pipe, so that the drain pipe and the insert pipe are tightly connected. When the negative pressure pipe is sucked by the vacuum pump, the drain pipe vacuum sucks the air and moisture in the soil, thereby achieving the purpose of compacting and improving the looseness of the soil;

[0022] 4. After the drain pipe in the utility model is blocked, the valve on the branch pipe is closed, the connecting pipe is separated from the branch pipe, the nut ring is unscrewed, the drain pipe is pulled out from the insert pipe, the drain pipe is repaired or replaced, and then the repaired or replaced drain pipe is connected again for vacuum suction, and finally the overall process of vacuum preloading is ensured;

[0023] The utility model discloses a movable soil compacting device based on vacuum preloading technology, which can not only realize the purpose of compacting soil and improving soil looseness, but also sets the drainage pipe to be movable. When the drainage pipe is blocked, the drainage pipe can be repaired or replaced in time to ensure the overall process of vacuum preloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0027] In the figure: sand layer 1, fixing block 2, insert pipe 3, sealing membrane 4, fixing mechanism 5, drain pipe 6, negative pressure pipe 7, branch pipe 8, connecting pipe 9, nut ring 10;

[0028] The fixing block 2 includes: a countersunk hole 21 and an anchor bolt 22;

[0029] The fixing mechanism 5 includes: a stud 51, a pressure ring 52, a locking nut 53, a sealing groove 54, and a sealing ring 55;

[0030] The drain pipe 6 includes an O-ring 61 . DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0032] like Figures 1 to 3 As shown, the utility model is a movable soil compacting device based on vacuum preloading technology, comprising a sand layer 1 laid on the top of the soil to be compacted, a plurality of fixed blocks 2 arranged at intervals are fixed on the sand layer 1, a sealing film 4 matching the surface shape of the fixed block 2 is attached to the surface of the fixed block 2, and the sealing film 4 extends to the surface of the sand layer 1 on the top of the soil to be compacted, and a fixing mechanism 5 for sealing and fixing the sealing film 4 is arranged corresponding to the upper side of the sealing film 4 at the top of the fixed block 2, so that the sand layer 1 on the top of the soil to be compacted is isolated from the outside atmosphere.

[0033] The sealing film 4 is covered on the surface of the fixed block 2 and the surface of the sand layer 1. When the sealing film 4 is fixed and compacted, the soil to be compacted under the fixed block 2 and the sand layer 1 is isolated from the outside atmosphere.

[0034] Specifically, a plurality of vertically arranged countersunk holes 21 are provided on the edge of the fixing block 2 , and anchor bolts 22 are arranged in the countersunk holes 21 . The anchor bolts 22 pass through the sand layer 1 and extend to the soil to be compacted, thereby achieving the purpose of fixing the fixing block 2 .

[0035] Preferably, the surface of the fixing block 2 is sloped, and has a smooth transition with the sand layer 1 , thereby ensuring the sealing performance of the sealing membrane 4 .

[0036] A plug 3 is fixed inside each of the fixing blocks 2, and the upper end of the plug 3 extends to above the fixing mechanism 5, and the lower end passes through the sand layer 1 and extends to the soil to be compacted; a freely movable drainage pipe 6 is sleeved inside the plug 3, and the upper end of the drainage pipe 6 extends to above the plug 3, and the lower end extends to the soil to be compacted; an O-ring 61 is embedded in the outer wall of the drainage pipe 6, and the O-ring 61 fits the inner wall of the plug 3, so that the drainage pipe 6 and the plug 3 are kept sealed.

[0037] In this embodiment, the insertion tube 3 passes through the top center of the fixing block 2 .

[0038] Specifically, the fixing mechanism 5 includes a plurality of studs 51 arranged around the insert tube 3, and each stud 51 is fixed at the top of the fixing block 2; a pressure ring 52 matching the surface of the fixing block 2 is commonly sleeved on all the studs 51, and the pressure ring 52 is arranged along the periphery of the insert tube 3; a locking nut 53 is threadedly connected to the top of each stud 51, and the locking nut 53 abuts against the pressure ring 52.

[0039] The sealing film 4 on the surface of the fixing block 2 is clamped at the bottom end of the fixing mechanism 5 , and the sealing film 4 is fixed by the combined action of the stud 51 , the pressure ring 52 , and the locking nut 53 .

[0040] The fixing mechanism 5 further comprises a sealing groove 54 formed around the fixing block 2 , wherein a sealing film 4 and a sealing ring 55 are embedded in the sealing groove 54 , and the sealing film 4 is located at the bottom end of the sealing ring 55 , and the sealing ring 55 is fixedly connected to the bottom end of the pressure ring 52 .

[0041] When the stud 51, the pressure ring 52, and the locking nut 53 fix the sealing membrane 4, under the compaction effect of the annular sealing groove 54 and the annular sealing ring 55, the sealing membrane 4 successfully isolates the soil to be compacted under the fixing block 2 and the sand layer 1 from the outside atmosphere.

[0042] Preferably, the longitudinal cross-sections of the bottoms of the sealing groove 54 and the sealing ring 55 are both semicircular structures, so as to reduce the friction between the sealing groove 54 or the sealing ring 55 and the sealing membrane 4 and increase the service life of the sealing membrane 4.

[0043] The utility model lays the sealing film 4 on the top of the sand layer and the surface of the fixed block, and compacts and seals the sealing film 4 in the sealing groove 54 on the surface of the fixed block 2 through the sealing ring 55 on the fixing mechanism 5, thereby ensuring that the sand layer 1 and the soil to be compacted are isolated from the outside atmosphere.

[0044] The top of each drainage pipe 6 is connected to a connecting pipe 9, each connecting pipe 9 is connected to a branch pipe 8, each branch pipe 8 is installed with a negative pressure gauge and a valve, and all the branch pipes 8 are commonly connected to a negative pressure pipe 7 for vacuum suction.

[0045] Preferably, a nut ring 10 is rotatably clamped at the top edge of the drain pipe 6, and the nut ring 10 is threadedly sleeved on the top of the insert pipe 3. The utility model rotatably clamps the nut ring 10 at the top edge of the drain pipe 6, so that the drain pipe 6 is tightly connected to the insert pipe 3. When the negative pressure pipe 7 is sucked by the vacuum pump, the drain pipe 6 vacuum-sucks the air and moisture in the soil, thereby achieving the purpose of compacting and improving the looseness of the soil.

[0046] Preferably, a filter screen and a filter cloth are provided at the bottom end of the drain pipe 6, which are used to filter the soil and vacuum-extract the air and moisture in the soil when the drain pipe 6 works under negative pressure.

[0047] Preferably, a plurality of O-rings 61 are embedded in the outer wall of the drain pipe 6 to enhance the sealing between the drain pipe 6 and the insertion tube 3 .

[0048] The utility model arranges a fixedly connected cannula 3 inside the fixed block 2, and then sets a freely movable drainage pipe 6 inside the cannula 3, and maintains a seal between the cannula 3 and the O-ring 61 embedded in the outer wall of the drainage pipe 6, so as to ensure that the inside of the cannula 3 is disconnected from the outside air during pinhole suction.

[0049] The working principle of this utility model:

[0050] First, the fixing block 2 is pressed on the sand layer 1, the insert pipe 3 is inserted into the soil layer, the fixing block 2 is fixed by the anchor bolt 22, the sealing film 4 is provided with a through hole corresponding to the top of the fixing block 2, and the sealing film 4 is attached to the surface of the fixing block 2, so that the sealing film 4 smoothly transitions between the fixing block 2 and the sand layer 1, and after the pressure ring 52 is sleeved on the stud 51, it is compacted by the locking nut 53, so that the sealing ring 55 compacts and seals the sealing film 4 in the sealing groove 54, thereby ensuring that the sand layer 1 is isolated from the outside atmosphere;

[0051] Second, the drain pipe 6 is sealed with the insert pipe 3 by the O-ring 61, so as to be disconnected from the outside air during pinhole suction. The nut ring 10 facilitates the close connection between the drain pipe 6 and the insert pipe 3. The connecting pipe 9 is connected to the branch pipe 8. Then, the negative pressure pipe 7 is sucked by the vacuum pump, and the drain pipe 6 vacuum-sucks the air and moisture in the soil, so as to compact the soil and improve the looseness of the soil.

[0052] Third, after the drain pipe 6 is blocked, close the valve on the branch pipe 8, separate the connecting pipe 9 from the branch pipe 8, unscrew the nut ring 10, pull out the drain pipe 6 from the insert pipe 3, repair or replace the drain pipe 6, and then continue to connect the repaired or replaced drain pipe 6 for vacuum suction, ultimately ensuring the overall process of vacuum preloading.

[0053] The utility model discloses a movable soil compacting device based on vacuum preloading technology, which can not only realize the purpose of compacting soil and improving soil looseness, but also sets the drainage pipe to be movable. When the drainage pipe is blocked, the drainage pipe can be repaired or replaced in time to ensure the overall process of vacuum preloading.

[0054] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A movable soil compacting device based on vacuum preloading technology, comprising a sand layer (1) laid on top of the soil to be compacted, characterized in that: A plurality of fixed blocks (2) arranged at intervals are fixed on the sand layer (1); a sealing film (4) matching the surface shape of the fixed block (2) is attached to the surface of the fixed block (2); the sealing film (4) extends to the surface of the sand layer (1) at the top of the soil to be compacted; a fixing mechanism (5) for sealing and fixing the sealing film (4) is provided on the upper side of the sealing film (4) at the top of the fixed block (2), thereby isolating the sand layer (1) at the top of the soil to be compacted from the outside atmosphere; Each of the fixing blocks (2) is fixed with a plug (3) inside, and the upper end of the plug (3) extends to the top of the fixing mechanism (5), and the lower end passes through the sand layer (1) and extends to the soil to be compacted; a freely movable drainage pipe (6) is sleeved inside the plug (3), and the upper end of the drainage pipe (6) extends to the top of the plug (3), and the lower end extends to the soil to be compacted; an O-ring (61) is embedded in the outer wall of the drainage pipe (6), and the O-ring (61) fits the inner wall of the plug (3), so that the drainage pipe (6) and the plug (3) are sealed; The top end of each drainage pipe (6) is connected to a connecting pipe (9), each connecting pipe (9) is connected to a branch pipe (8), each branch pipe (8) is installed with a negative pressure gauge and a valve, and all the branch pipes (8) are commonly connected to a negative pressure pipe (7) for vacuum suction.

2. The movable soil compacting device based on vacuum preloading technology according to claim 1 is characterized in that: The edge of the fixing block (2) is provided with a plurality of vertically arranged countersunk holes (21), and anchor bolts (22) are arranged in the countersunk holes (21), and the anchor bolts (22) pass through the sand layer (1) and extend to the soil to be compacted.

3. The movable soil compacting device based on vacuum preloading technology according to claim 2 is characterized in that: The surface of the fixing block (2) is sloped and smoothly transitions to the sand layer (1).

4. The movable soil compacting device based on vacuum preloading technology according to claim 1 is characterized in that: The fixing mechanism (5) comprises a plurality of studs (51) arranged around the insert tube (3), and each stud (51) is fixed to the top of the fixing block (2); a pressure ring (52) matching the surface of the fixing block (2) is sleeved on all the studs (51), and the pressure ring (52) is arranged along the periphery of the insert tube (3); a locking nut (53) is threadedly connected to the top of each stud (51), and the locking nut (53) abuts against the pressure ring (52); The fixing mechanism (5) further comprises a sealing groove (54) formed around the fixing block (2), wherein a sealing film (4) and a sealing ring (55) are embedded in the sealing groove (54), wherein the sealing film (4) is located at the bottom end of the sealing ring (55), and the sealing ring (55) is fixedly connected to the bottom end of the pressure ring (52).

5. The movable soil compacting device based on vacuum preloading technology according to claim 4 is characterized in that: The longitudinal cross-sections of the bottom of the sealing groove (54) and the sealing ring (55) are both semicircular structures.

6. The movable soil compacting device based on vacuum preloading technology according to claim 1 is characterized in that: The top edge of the drainage pipe (6) is rotatably clamped with a nut ring (10), and the nut ring (10) is threadedly sleeved on the top of the insertion pipe (3).

7. The movable soil compacting device based on vacuum preloading technology according to claim 6 is characterized in that: A filter screen and filter cloth are arranged at the bottom end of the drainage pipe (6).

8. The movable soil compacting device based on vacuum preloading technology according to claim 7 is characterized in that: A plurality of O-rings (61) are embedded in the outer wall of the drainage pipe (6).

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