Sludge curing agent adding structure and device and roadbed ditch pond sludge curing construction method

Abstract

The invention provides a sludge curing agent adding structure and device and a roadbed ditch pond sludge curing construction method. The sludge curing agent adding structure comprises a middle-layer cylinder, a strip-shaped hole used for spraying curing liquid is formed in the surface of the middle-layer cylinder, an inner-layer cylinder is arranged in the middle-layer cylinder, arc-shaped flow guide grooves are formed in the two ends, corresponding to the strip-shaped hole, of the middle-layer cylinder, and grating holes are formed in the surface, corresponding to an annular groove, of the inner-layer cylinder in the circumferential direction at equal intervals. The surface of the inner-layer cylinder is rotationally sleeved with a connecting plate, the inner wall face of the middle-layer cylinder axially and slidably sleeves the connecting plate, the middle-layer cylinder is sleeved with an outer-layer cylinder, rectangular holes are formed in the positions, corresponding to the strip-shaped holes, of the surface of the outer-layer cylinder, elastic telescopic rods are arranged at the two ends of the connecting plate, and plug plates are arranged at the extending ends of the elastic telescopic rods. The method has the advantages that the bearing capacity of the roadbed is improved, differential settlement of the roadbed is reduced, resources and land are effectively saved, and the economic benefit is better.

Description

Technical Field

[0001] The invention relates to the technical field of roadbed treatment, and in particular to a sludge solidifying agent adding structure, a device and a roadbed ditch pond sludge solidification construction method. Background Art

[0002] At present, the main methods for treating soft foundation of municipal roads are: replacement method, cement mixing pile method, gravel pile method, CFG pile method, dynamic compaction method, preloading method, plastic drainage board method, etc.; the replacement method is to replace the relatively soft soil in the previous soft foundation with soil with high bearing capacity and good stability, so as to effectively improve the foundation structure and solve the problems that may occur in the soft foundation during the construction process. However, because the construction volume of all silt soil replacement is very large, it requires a lot of funds and labor, and it is also necessary to pay attention to the selection of suitable replacement soil, and it has a certain impact on the environment; the cement mixing pile method, gravel pile method, CFG pile method, dynamic compaction method, preloading method, plastic drainage board method and other engineering costs are high, the technical difficulty is relatively large, and it is not suitable for the construction of ditches and ponds with smaller areas.

[0003] Silt solidification is to make a series of hydrolysis and hydration reactions between silt, soil solidifier and water, produce cementitious substances and crystalline substances that bind soil particles, and at the same time stimulate the activity of soil particles themselves through stimulants to make them participate in the reaction, so that silt has certain structural strength and other characteristics, and the strength can be steadily increased over a long period of time. Therefore, the application of silt solidification in soft foundation construction has great prospects and economic value. Summary of the invention

[0004] In order to solve the above technical problems, the present invention proposes a sludge solidifying agent adding structure, device and roadbed ditch pond sludge solidification construction method.

[0005] The technical solution of the present invention is achieved in this way:

[0006] The first aspect of the present invention provides a sludge solidifying agent adding structure, including a middle layer cylinder, the surface of the middle layer cylinder is provided with strip holes for spraying solidifying liquid, the interior of the middle layer cylinder is provided with an inner layer cylinder, one end of the inner layer cylinder is connected to a liquid adding tube, the inner layer cylinder blocks the inner side opening of the strip hole by fitting on the inner wall surface of the middle layer cylinder, the middle layer cylinder is provided with arc-shaped guide grooves at both ends corresponding to the strip holes, the surface of the inner layer cylinder is provided with grille holes equidistantly arranged in the circumferential direction corresponding to the annular groove, the surface of the inner layer cylinder is rotatably sleeved with a connecting plate, and the inner wall surface of the middle layer cylinder is axially slidably sleeved on the outside of the connecting plate, and the middle layer cylinder An outer layer cylinder is sleeved on the outside, and a rectangular hole is opened on the surface of the outer layer cylinder at a position corresponding to the strip hole. The outer layer cylinder is used to drive the middle layer cylinder to rotate, and a driving structure is provided between the middle layer cylinder and the inner layer cylinder for driving the middle layer cylinder to axially move back and forth between the inner layer cylinder and the outer layer cylinder when the middle layer cylinder rotates. Both ends of the connecting plate are provided with elastic telescopic rods, and the protruding ends of the elastic telescopic rods are provided with plug plates. The two plug plates are respectively provided at the two ends of the strip hole and separate the grille hole from the strip hole, and the middle layer cylinder pushes the plug plate on the front side of the strip hole into the range of the grille hole during the axial displacement process, so that the front end of the strip hole is connected with the grille hole through the guide groove.

[0007] Furthermore, the driving structure includes a wave groove and a roller, the wave groove is opened on the surface of the inner layer cylinder, the roller is located in the wave groove, and the roller is installed on the inner wall surface of the middle layer cylinder.

[0008] Furthermore, a swivel is fixedly provided on the inner surface of the connecting plate, an annular groove is provided on the surface of the inner layer cylinder, the swivel is sleeved in the annular groove, and a connecting groove distributed along the axial direction is provided on the inner wall surface of the middle layer cylinder, and the connecting groove is sleeved on the outside of the connecting block.

[0009] Furthermore, the width of the arc groove is greater than the width of the strip hole, the length of the rectangular hole is adapted to the strip hole, the two end faces and the outer side face of the plug plate are attached to the inner wall surface of the arc groove, and the inner surface of the plug plate is attached to the outer wall surface of the inner layer tube.

[0010] Furthermore, a first blade is fixedly provided on the surface of the outer layer cylinder corresponding to the portion between two adjacent rectangular holes, and a second blade extending from the rectangular hole is fixedly provided on the surface of the middle layer cylinder, and the circumferential side surfaces of the second blade are respectively fitted with the circumferential inner wall surfaces of the rectangular hole.

[0011] Furthermore, the distance between the two circles of grille holes at both ends of the strip hole is greater than the length of the strip hole, so that when the strip hole is located in the middle position of the two circles of grille holes, the part of the guide groove located between the end of the strip hole and the plug plate forms a peristaltic chamber, and the end of the plug plate away from the elastic telescopic rod is connected to a peristaltic component, and the peristaltic component is installed on the middle cylinder. When the middle cylinder is displaced axially, the plug plate that is not in contact with the end of the strip hole is driven by its corresponding peristaltic component to reciprocate in the area of ​​the guide groove located between the end of the strip hole and the grille hole.

[0012] Furthermore, the peristaltic assembly includes a peristaltic rod, a peristaltic block, a tooth plate and a force storage spring, one end of the peristaltic rod is connected to a side surface of the plug plate away from the elastic telescopic rod, the other end of the peristaltic rod is connected to the peristaltic block, and one tooth plate is arranged on both sides of the peristaltic block. The force storage spring is arranged on a side surface of the tooth plate away from the peristaltic block, and is used to provide elastic force for the tooth plate to clamp the peristaltic block, so that when the tooth plate follows the displacement of the middle layer cylinder, the peristaltic assembly stretches or compresses the elastic telescopic rod by driving the plug plate, so that the elastic telescopic rod provides a force for the peristaltic block to squeeze the tooth plate and the force storage spring to cross the teeth on the tooth plate one by one.

[0013] Furthermore, a baffle is fixedly provided on one side of the plug plate facing the strip hole, and one end of the baffle facing the strip hole is inserted into the middle tube, and the baffle separates the part of the guide groove located on both sides of the plug plate from the part corresponding to the end of the strip hole.

[0014] The second aspect of the present invention provides a sludge solidifying agent adding device, including the above-mentioned sludge solidifying agent adding structure, and also includes a mechanical arm, a liquid supply pipe and a power component, the liquid supply pipe is arranged inside the mechanical arm, the outer layer cylinder is rotatably installed at the bottom end of the side of the mechanical arm, the inner layer cylinder is fixedly installed on the mechanical arm, the liquid supply pipe is connected to the inner end of the inner layer cylinder, the power component is arranged inside the mechanical arm, and the power component is connected to the end of the outer layer cylinder located inside the mechanical arm, and the power component is used to drive the outer layer cylinder to rotate.

[0015] The third aspect of the present invention provides a roadbed ditch pond silt solidification construction method, using the above-mentioned silt solidifying agent adding device, the method comprises the following steps:

[0016] S1~Before pumping, use the total station to determine the starting and ending pile numbers and the position of the slope foot of the roadbed treatment of the pond section according to the design diagram, measure the original water surface elevation, and determine the center line of the ditch and pond. After pumping, measure the elevation of the top surface of the silt and the elevation of the ditch and pond bottom;

[0017] S2~Set up a cofferdam, and use dump trucks to transport the slag to the edge of the ditch and pond, and use loaders to push the slag into the ditch and pond. The bearing capacity and width of the cofferdam must meet the transportation needs of the dump trucks. The slope of the outer side of the cofferdam facing the water is 1:0.75, and the slope of the inner side facing the water is 1:0.3. The top width of the cofferdam is 60cm and it is at least 50cm above the water surface;

[0018] S3~After the cofferdam is set up, the ditch and pond drainage begins, and large-diameter water pumps are used to continuously drain the water out of the roadbed;

[0019] S4~Drainage is carried out by backhoe excavator and transported to the designated location by dump truck. The desilting sequence is carried out in sections according to the sequence of drainage completion;

[0020] S5~After the dredging is completed, the bottom of the ditch is leveled by manual labor and machinery, and the slope is dug into steps no less than 1m wide. The bottom of the ditch is backfilled with 30cm of treated slag and silt, and compacted with a roller until there are no obvious wheel marks;

[0021] S6~using the above-mentioned sludge solidifying agent adding device to add the solidifying agent into the sludge, adding the admixture into the sludge, and then using a rotary tiller and a land grader to mix the sludge;

[0022] S7~After the land is leveled by the grader, when the moisture content is close to or slightly higher than the optimum moisture content of about 2%, the machine can be organized for compaction.

[0023] 1. Compared with the prior art, the sludge solidifying agent adding structure and device of the present invention can inject the solidifying liquid by directly inserting the sludge solidifying agent adding structure into the sludge, so that the solidifying liquid can be mixed with the sludge more fully and evenly, thereby improving the solidifying effect of the sludge. At the same time, the strip holes for injecting the solidifying liquid can prevent the blockage of the strip holes by alternately injecting the solidifying liquid at both ends and flushing in the opposite direction, thereby improving the use effect.

[0024] 2. Compared with the prior art, the present invention determines reasonable construction parameters by adding cement curing agent and slag admixture for composite use, thereby achieving the purpose of improving the bearing capacity of the roadbed and reducing the differential settlement of the roadbed. To a certain extent, it can effectively save resources and land, and has obvious economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the structure of the sludge solidifying agent adding structure according to the first embodiment of the present invention;

[0026] Figure 2 The present invention Figure 1 A cross-sectional view of

[0027] Figure 3 The present invention Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 The present invention Figure 2 Schematic diagram of the middle tube after it is cut open;

[0029] Figure 5 The present invention Figure 4 Enlarged view of point B in the middle;

[0030] Figure 6 The present invention Figure 5 Enlarged view of point C in the middle;

[0031] Figure 7 It is a schematic diagram of the outer tube of the present invention;

[0032] Figure 8 Schematic diagram of the middle tube of the present invention;

[0033] Fig. 9 Schematic diagram of the inner tube of the present invention;

[0034] Fig.10 is a schematic diagram of a peristaltic assembly of the present invention;

[0035] Fig.11 It is a schematic structural diagram of a sludge solidifying agent adding device of the present invention.

[0036] In the figure: 100, sludge solidifying agent adding structure; 1, middle cylinder; 2, strip hole; 3, inner cylinder; 4, liquid adding pipe; 5, guide groove; 6, grille hole; 7, connecting plate; 8, elastic telescopic rod; 9, plug plate; 10, wave groove; 11, roller; 12, swivel; 13, annular groove; 14, connecting groove; 15, first blade; 16, second blade; 17, peristaltic chamber; 18, peristaltic rod; 19, peristaltic block; 20, tooth plate; 21, force storage spring; 22, baffle; 23, mechanical arm; 24, liquid supply pipe; 25, power component; 26, outer cylinder; 27, rectangular hole. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1

[0039] like Figures 1 to 10As shown, a sludge solidifying agent adding structure comprises a middle layer cylinder 1, the surface of the middle layer cylinder 1 is provided with strip holes 2 for spraying solidifying liquid, the middle layer cylinder 1 is provided with an inner layer cylinder 3, one end of the inner layer cylinder 3 is connected with a liquid adding pipe 4, the inner layer cylinder 3 blocks the inner opening of the strip hole 2 by fitting on the inner wall surface of the middle layer cylinder 1, the middle layer cylinder 1 is provided with arc-shaped guide grooves 5 at both ends corresponding to the strip holes 2, the surface of the inner layer cylinder 3 is provided with grille holes 6 equidistantly along the circumferential direction corresponding to the annular grooves 13, the surface of the inner layer cylinder 3 is rotatably sleeved with a connecting plate 7, and the inner wall surface of the middle layer cylinder 1 is axially slidably sleeved on the outside of the connecting plate 7, the outer layer cylinder 26 is sleeved on the outside of the middle layer cylinder 1, and the outer A rectangular hole 27 is opened on the surface of the layer cylinder 2616 at a position corresponding to the strip hole 2. The outer layer cylinder 26 is used to drive the middle layer cylinder 1 to rotate. A driving structure is arranged between the middle layer cylinder 1 and the inner layer cylinder 3 to drive the middle layer cylinder 1 to move axially back and forth between the inner layer cylinder 3 and the outer layer cylinder 26 when the middle layer cylinder 1 rotates. Elastic telescopic rods 8 are arranged at both ends of the connecting plate 7. The protruding ends of the elastic telescopic rods 8 are arranged with plug plates 9. The two plug plates 9 are respectively arranged at the two ends of the strip hole 2 and separate the grille hole 6 from the strip hole 2. The middle layer cylinder 1 pushes the plug plate 9 on the front side of the strip hole 2 into the range of the grille hole 6 during the axial displacement process, so that the front end of the strip hole 2 is connected with the grille hole 6 through the guide groove 5.

[0040] The solidifying liquid enters the inner cylinder 3 from the liquid adding pipe 4, and the outer cylinder 26 drives the middle cylinder 1 to rotate during the rotation process. At this time, the driving structure makes the middle cylinder 1 move back and forth between the inner cylinder 3 and the outer cylinder 26. At this time, in the displacement direction of the middle cylinder 1, the front end of the strip hole 2 pushes the plug plate 9 located on the front side to move forward, so that the elastic telescopic rod 8 on the front side is stretched. When the plug plate 9 on the front side enters the range of the grille hole 6, the front end of the inner hole opening of the strip hole 2 moves into the range of the grille hole 6, so that the strip hole 2, the guide groove 5 and the grille hole 6 are connected. Then, the solidifying liquid in the inner cylinder 3 passes through the grille hole 6 and the guide groove 5 and enters the strip hole 2 from the front end of the inner hole opening of the strip hole 2. After the solidifying liquid enters the strip hole 2, it turns to the rear side after impacting the inner wall surface of the outer cylinder 26 and rushes out of the strip hole 2 toward the rear side of the strip hole 2. Similarly, when the middle tube 1 moves backward, the front end of the strip hole 2 will be blocked by the plug plate 9 at the front end, and the solidified liquid will rush out of the strip hole 2 from the rear end of the strip hole 2 in advance.

[0041] In this embodiment, the sludge solidifying agent adding structure 100 can improve the mixing effect of the sludge and the solidifying liquid by spraying the solidifying liquid from the strip hole 2 when rotating inside the sludge after being inserted into the sludge, thereby improving the solidifying effect. In addition, the strip hole 2 sprays the solidifying liquid alternately at the front and rear ends, which can not only improve the mixing effect of the sludge and the solidifying liquid by changing the spraying direction of the solidifying liquid, but also achieve a two-way flushing effect inside the strip hole 2, prevent the strip hole 2 from being blocked by sludge, and fully ensure the effective spraying of the solidifying liquid.

[0042] In a preferred embodiment, the driving structure includes a wave groove 10 and a roller 11, the wave groove 10 is opened on the surface of the inner layer cylinder 3, the roller 11 is located in the wave groove 10, and the roller 11 is installed on the inner wall surface of the middle layer cylinder 1. When the sludge solidifying agent adding structure 100 is inserted into the sludge to perform the solidifying liquid injection operation, the inner layer cylinder 3 remains stationary, and then, during the rotation of the middle layer cylinder 1, the roller 11 moves in the wave groove 10, so that the middle layer cylinder 1 moves back and forth in the axial direction.

[0043] In a preferred embodiment, a swivel 12 is fixedly provided on the inner surface of the connecting plate 7, an annular groove 13 is provided on the surface of the inner layer cylinder 3, the swivel 12 is sleeved in the annular groove 13, and a connecting groove 14 distributed along the axial direction is provided on the inner wall surface of the middle layer cylinder 1, and the connecting groove 14 is sleeved on the outside of the connecting block.

[0044] In this embodiment, the swivel 12 completely covers the annular groove 13, which can effectively block the silt that is exposed from the inner layer tube 3 in the strip hole 2 and the rectangular hole 27. In addition, the connecting groove 14 cooperates with the swivel 12, so that the connecting plate 7 is effectively limited by the inner layer tube 3 in the axial direction, and then, the connecting plate 7 remains stationary during the axial reciprocating movement of the middle layer tube 1. In this way, the connecting plate 7 can keep the plug plate 9 stably in the state of blocking the end of the strip hole 2 through the elastic telescopic rod 8.

[0045] In a preferred embodiment, the width of the arc groove is greater than the width of the strip hole 2, the length of the rectangular hole 27 is adapted to the strip hole 2, the two end faces and the outer side face of the plug plate 9 are attached to the inner wall surface of the arc groove, and the inner surface of the plug plate 9 is attached to the outer wall surface of the inner layer cylinder 3. During the axial displacement of the middle layer cylinder 1, the strip hole 2 moves synchronously with the middle layer cylinder 1. During this process, the rectangular hole 27 remains stationary in the axial direction. Then, after the front end of the strip hole 2 in its moving direction is connected with the grille hole 6 through the guide groove 5, the solidified liquid entering the strip hole 2 will be blocked by the inner wall of the outer layer cylinder 26, so that the solidified liquid adjusts its direction and is forced to spray out of the strip hole 2 in the backward direction. During this process, the solidified liquid can flush the sludge entering the strip hole 2 out of the strip hole 2. Then, the process of alternately flushing in the opposite direction by spraying the solidified liquid at both ends of the strip hole 2 can keep the strip hole 2 in a smooth state and prevent the strip hole 2 from being blocked.

[0046] In a preferred embodiment, the surface of the outer layer cylinder 26 is fixedly provided with a first blade 15 corresponding to the position between two adjacent rectangular holes 27, and the surface of the middle layer cylinder 1 is fixedly provided with a second blade 16 extending from the rectangular hole 27, and the circumferential side surfaces of the second blade 16 are respectively fitted with the circumferential inner wall surfaces of the rectangular hole 27. In the process of spraying the solidifying liquid in the sludge, the outer layer cylinder 26 and the inner layer cylinder 3 perform synchronous rotation. At this time, the first blade 15 and the second blade 16 rotate to cut the sludge and improve the mixing effect of the sludge and the solidifying liquid. At the same time, during the axial displacement of the middle layer cylinder 1, the second blade 16 will reciprocate the sludge in the axial direction to improve the peristaltic effect of the sludge and enhance the mixing effect of the sludge and the solidifying liquid. In addition, the rectangular hole 27 is always sleeved on the second blade 16. During the rotation of the outer cylinder, the middle layer cylinder 1 is pushed to rotate by the rectangular hole 27 and the second blade 16. In this way, the purpose of the outer layer cylinder 26 driving the middle layer cylinder 1 to rotate is achieved.

[0047] In a preferred embodiment, the distance between the two circles of grille holes 6 at both ends of the strip hole 2 is greater than the length of the strip hole 2, so that when the strip hole 2 is located in the middle position of the two circles of grille holes 6, the part of the guide groove 5 located between the end of the strip hole 2 and the plug plate 9 forms a peristaltic chamber 17, and the end of the plug plate 9 away from the elastic telescopic rod 8 is connected to a peristaltic component, and the peristaltic component is installed on the middle cylinder 1. When the middle cylinder 1 is displaced axially, the plug plate 9 that is not in contact with the end of the strip hole 2 is driven by its corresponding peristaltic component to reciprocate in the area of ​​the guide groove 5 located between the end of the strip hole 2 and the grille hole 6.

[0048] In this embodiment, before the middle tube 1 is axially displaced to connect the strip holes 2 with the grille holes 6, the peristaltic assembly drives the plug plate 9 to move back and forth in the peristaltic chamber 17 to achieve a peristaltic state. In this arrangement, the plug plate 9 cooperates with the peristaltic chamber 17 to suck and discharge the sludge in the strip holes 2, so that the sludge in the strip holes 2 continues to peristalsize, preventing the sludge in the strip holes 2 from agglomerating and blocking the strip holes 2.

[0049] On this basis, the peristaltic component includes a peristaltic rod 18, a peristaltic block 19, a tooth plate 20 and a force storage spring 21. One end of the peristaltic rod 18 is connected to a side surface of the plug plate 9 away from the elastic telescopic rod 8, and the other end of the peristaltic rod 18 is connected to the peristaltic block 19. A tooth plate 20 is arranged on both sides of the peristaltic block 19. The force storage spring 21 is arranged on a side surface of the tooth plate 20 away from the peristaltic block 19, which is used to provide elastic force for the tooth plate 20 to clamp the peristaltic block 19, so that when the tooth plate 20 follows the displacement of the middle layer cylinder 1, the peristaltic component stretches or compresses the elastic telescopic rod 8 by driving the plug plate 9, so that the elastic telescopic rod 8 provides a force for the peristaltic block 19 to squeeze the tooth plate 20 and the force storage spring 21 to cross the teeth on the tooth plate 20 one by one.

[0050] In the initial state, the tooth plate 20 is sleeved on the end of the peristaltic block 19 under the action of the force storage spring 21. When the middle tube 1 is displaced axially and the front end of the strip hole 2 does not contact the plug plate 9 in front of it in the displacement direction, the tooth plates 20 on the front and rear sides of the strip hole 2 follow the displacement of the middle tube 1, and the tooth plate 20 drives the plug plate 9 to displace through the peristaltic block 19 and the peristaltic rod 18, so that the elastic telescopic rod 8 is stretched or compressed. After the elastic telescopic rod 8 is compressed a certain distance, the elastic telescopic rod 8 applies a force to the plug plate 9, so that the peristaltic block 19 pushes the tooth plate 20 open. At this time, the peristaltic block 19 performs a reset movement. Then, the tooth plate 20 and the elastic telescopic rod 8 alternately apply a pulling force in opposite directions to the plug plate 9, so that the two plug plates 9 in front and behind the strip hole 2 move back to the reset position in the peristaltic chamber 17 to perform a peristaltic process. When the front end of the strip hole 2 contacts the plug plate 9 in front of it, the front plug plate 9 stops creeping and is pushed forward by the strip hole 2 to within the range of the grille hole 6. At this time, the plug plate 9 in the rear continues to creep.

[0051] Therefore, for the plug plates 9 on both sides of the strip hole 2, when any one of the plug plates 9 is displaced to the range of the grille hole 6 in the corresponding direction after being attached to the end of the strip hole 2, the plug plate 9 stops the creeping process, while the other plug plates 9 always keep the creeping process. When solidifying liquid is sprayed out from one end of the strip hole 2, the plug plate 9 at the other end of the strip hole 2 creeps, and cooperates with the flushing effect of the solidifying liquid, so that the sludge in the strip hole 2 can be flushed more effectively under the flushing effect of the solidifying liquid, thereby ensuring the anti-blocking effect of the strip hole 2.

[0052] On this basis, preferably, a baffle 22 is fixedly provided on one side of the plug plate 9 facing the strip hole 2, and one end of the baffle 22 facing the strip hole 2 is inserted into the middle tube 1, and the baffle 22 separates the portion of the guide groove 5 located on both sides of the plug plate 9 from the portion corresponding to the end of the strip hole 2. In this arrangement, the peristaltic chamber 17 is the area surrounded by the plug plate 9, the strip hole 2 and the baffle 22, which can prevent the sludge from entering the guide groove 5 from the side of the peristaltic chamber 17 during the peristalsis of the plug plate 9, thereby effectively blocking the sludge.

[0053] Embodiment 2

[0054] like Fig.11As shown, a sludge solidifying agent adding device uses the above-mentioned sludge solidifying agent adding structure 100, wherein the sludge solidifying agent adding device also includes a mechanical arm 23, a liquid supply pipe 24 and a power component 25, the liquid supply pipe 24 is arranged inside the mechanical arm 23, the outer layer cylinder 26 is rotatably installed at the bottom end of the side of the mechanical arm 23, the inner layer cylinder 3 is fixedly installed on the mechanical arm 23, the liquid supply pipe 24 is connected to the inner end of the inner layer cylinder 3, the power component 25 is arranged inside the mechanical arm 23, and the power component 25 is connected to the end of the outer layer cylinder 26 located inside the mechanical arm 23, and the power component 25 is used to drive the outer layer cylinder 26 to rotate.

[0055] In this embodiment, preferably, the mechanical arm 23 can be installed on the forearm of the excavator, and the excavator drives the mechanical arm 23 to insert the sludge solidifying agent adding structure 100 into the sludge, and drives the sludge solidifying agent adding structure 100 to move in the sludge, so as to achieve mixing of sludge and solidifying liquid at different positions. The liquid supply pipe 24 can be externally connected to a pump body to provide solidifying liquid and pressure for solidifying liquid injection for the sludge solidifying agent adding structure 100.

[0056] Embodiment 3

[0057] A sludge solidification method, using the above-mentioned sludge solidifying agent adding device, the method comprises the following steps:

[0058] S1~Before pumping, use the total station to determine the starting and ending pile numbers and the position of the slope foot of the roadbed treatment of the pond section according to the design diagram, measure the original water surface elevation, and determine the center line of the ditch and pond. After pumping, measure the elevation of the top surface of the silt and the elevation of the ditch and pond bottom;

[0059] S2~Set up a cofferdam, and use dump trucks to transport the slag to the edge of the ditch and pond, and use loaders to push the slag into the ditch and pond. The bearing capacity and width of the cofferdam must meet the transportation needs of the dump trucks. The slope of the outer side of the cofferdam facing the water is 1:0.75, and the slope of the inner side facing the water is 1:0.3. The top width of the cofferdam is 60cm and it is at least 50cm above the water surface;

[0060] S3~After the cofferdam is set up, the ditch and pond drainage begins, and large-diameter water pumps are used to continuously drain the water out of the roadbed;

[0061] S4~Drainage is carried out by backhoe excavator and transported to the designated location by dump truck. The desilting sequence is carried out in sections according to the sequence of drainage completion;

[0062] S5~After the dredging is completed, the bottom of the ditch is leveled by manual labor and machinery, and the slope is dug into steps no less than 1m wide. The bottom of the ditch is backfilled with 30cm of treated slag and silt, and compacted with a roller until there are no obvious wheel marks;

[0063] S6~using the above-mentioned sludge solidifying agent adding device to add the solidifying agent into the sludge, and then using a rotary tiller and a land grader to mix the sludge;

[0064] S7~After the land is leveled by the grader, when the moisture content is close to or slightly higher than the optimum moisture content of about 2%, the machine can be organized for compaction.

[0065] In step S6, cement is selected as a curing agent to improve the bearing capacity of the sludge, and the crushed construction slag is used as an admixture to reduce the moisture content of the sludge. Cement and construction slag are evenly added to the sludge according to the optimal mix ratio. According to the different physical properties of the sludge, the optimal mix ratio test is carried out before construction, and the single admixture test is used to detect the effect of cement dosage on the unconfined compressive strength of the sludge, and the effect of the treated construction slag mix ratio on the moisture content of the sludge is detected. A composite test is used to determine the optimal mix ratio, and its physical properties such as unconfined compressive strength, bearing specific strength CBR and moisture content are measured to meet the indicators of roadbed filling. The treated construction slag requires that the particle size of the construction waste after crushing is 8-16mm, accounting for more than 95%.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sludge solidifying agent adding structure, characterized in that: The invention comprises a middle tube (1), wherein the surface of the middle tube (1) is provided with strip holes (2) for spraying solidifying liquid, an inner tube (3) is provided inside the middle tube (1), one end of the inner tube (3) is connected with a liquid adding tube (4), the inner tube (3) blocks the inner opening of the strip holes (2) by being attached to the inner wall surface of the middle tube (1), the middle tube (1) is provided with arc-shaped guide grooves (5) at both ends corresponding to the strip holes (2), the surface of the inner tube (3) is provided with grille holes (6) equidistantly along the circumferential direction corresponding to the annular grooves (13), the surface of the inner tube (3) is rotatably sleeved with a connecting plate (7), and the inner wall surface of the middle tube (1) is axially slidably sleeved on the outside of the connecting plate (7), the outer tube (26) (16 ) is provided with a rectangular hole (27) at a position corresponding to the strip hole (2); the outer layer cylinder (26) is used to drive the middle layer cylinder (1) to rotate; a driving structure is provided between the middle layer cylinder (1) and the inner layer cylinder (3) for driving the middle layer cylinder (1) to axially move back and forth between the inner layer cylinder (3) and the outer layer cylinder (26) when the middle layer cylinder (1) rotates; elastic telescopic rods (8) are provided at both ends of the connecting plate (7); plug plates (9) are provided at the protruding ends of the elastic telescopic rods (8); the two plug plates (9) are respectively provided at the two ends of the strip hole (2) and separate the grille hole (6) from the strip hole (2); and the middle layer cylinder (1) pushes the plug plate (9) on the front side of the strip hole (2) into the range of the grille hole (6) during the axial displacement process, so that the front end of the strip hole (2) is connected with the grille hole (6) through the guide groove (5).

2. A sludge solidifying agent adding structure according to claim 1, characterized in that: The driving structure comprises a wave groove (10) and a roller (11), wherein the wave groove (10) is provided on the surface of the inner layer cylinder (3), the roller (11) is located in the wave groove (10), and the roller (11) is installed on the inner wall surface of the middle layer cylinder (1).

3. A sludge solidifying agent adding structure according to claim 1, characterized in that: A rotating ring (12) is fixedly provided on the inner surface of the connecting plate (7), an annular groove (13) is provided on the surface of the inner layer cylinder (3), and the rotating ring (12) is sleeved in the annular groove (13); a connecting groove (14) distributed along the axial direction is provided on the inner wall surface of the middle layer cylinder (1), and the connecting groove (14) is sleeved on the outside of the connecting block.

4. A sludge solidifying agent adding structure according to claim 1, characterized in that: The width of the arc groove is greater than the width of the strip hole (2), the length of the rectangular hole (27) is compatible with the strip hole (2), the two end faces and the outer side surface of the plug plate (9) are attached to the inner wall surface of the arc groove, and the inner surface of the plug plate (9) is attached to the outer wall surface of the inner layer tube (3).

5. A sludge solidifying agent adding structure according to claim 1, characterized in that: A first blade (15) is fixedly provided on the surface of the outer layer tube (26) corresponding to the position between two adjacent rectangular holes (27), and a second blade (16) extending from the rectangular hole (27) is fixedly provided on the surface of the middle layer tube (1), and the circumferential side surfaces of the second blade (16) are respectively in contact with the circumferential inner wall surfaces of the rectangular hole (27).

6. A sludge solidifying agent adding structure according to claim 1, characterized in that: The distance between the two circles of grille holes (6) at the two ends of the strip hole (2) is greater than the length of the strip hole (2), so that when the strip hole (2) is located in the middle of the two circles of grille holes (6), the portion of the guide groove (5) located between the end of the strip hole (2) and the plug plate (9) forms a peristaltic chamber (17), and the end of the plug plate (9) away from the elastic telescopic rod (8) is connected to a peristaltic component, and the peristaltic component is installed on the middle cylinder (1). When the middle cylinder (1) is displaced axially, the plug plate (9) that is not in contact with the end of the strip hole (2) is driven by its corresponding peristaltic component to reciprocate in the area of ​​the guide groove (5) located between the end of the strip hole (2) and the grille hole (6).

7. A sludge solidifying agent adding structure according to claim 6, characterized in that: The peristaltic assembly comprises a peristaltic rod (18), a peristaltic block (19), a tooth plate (20) and a force storage spring (21). One end of the peristaltic rod (18) is connected to a side surface of the plug plate (9) away from the elastic telescopic rod (8), and the other end of the peristaltic rod (18) is connected to the peristaltic block (19). One tooth plate (20) is provided on both sides of the peristaltic block (19). The force storage spring (21) is provided on a side surface of the tooth plate (20) away from the peristaltic block (19) and is used to provide elastic force for the tooth plate (20) to clamp the peristaltic block (19), so that when the tooth plate (20) follows the displacement of the middle layer cylinder (1), the peristaltic assembly stretches or compresses the elastic telescopic rod (8) by driving the plug plate (9), so that the elastic telescopic rod (8) provides a force for the peristaltic block (19) to squeeze the tooth plate (20) and the force storage spring (21) to pass over the teeth on the tooth plate (20) one by one.

8. A sludge solidifying agent adding structure according to claim 7, characterized in that: A baffle (22) is fixedly provided on one side of the plug plate (9) facing the strip hole (2); one end of the baffle (22) facing the strip hole (2) is inserted into the middle tube (1); the baffle (22) separates the portion of the guide groove (5) located on both sides of the plug plate (9) from the portion corresponding to the end of the strip hole (2).

9. A sludge solidifying agent adding device, comprising the sludge solidifying agent adding structure (100) according to any one of claims 1 to 8, characterized in that: It also includes a mechanical arm (23), a liquid supply pipe (24) and a power component (25), wherein the liquid supply pipe (24) is arranged inside the mechanical arm (23), the outer layer cylinder (26) is rotatably mounted on the bottom end of the side of the mechanical arm (23), the inner layer cylinder (3) is fixedly mounted on the mechanical arm (23), the liquid supply pipe (24) is connected to the inner side end of the inner layer cylinder (3), the power component (25) is arranged inside the mechanical arm (23), and the power component (25) is connected to the end of the outer layer cylinder (26) located inside the mechanical arm (23), and the power component (25) is used to drive the outer layer cylinder (26) to rotate.

10. A roadbed ditch pond silt solidification construction method, using the silt solidifying agent adding device according to claim 9, characterized in that: The method comprises the following steps: S1~Before pumping, use the total station to determine the starting and ending pile numbers and the position of the slope foot of the roadbed treatment of the pond section according to the design diagram, measure the original water surface elevation, and determine the center line of the ditch and pond. After pumping, measure the elevation of the top surface of the silt and the elevation of the ditch and pond bottom; S2~Set up a cofferdam, and use dump trucks to transport the slag to the edge of the ditch and pond, and use loaders to push the slag into the ditch and pond. The bearing capacity and width of the cofferdam must meet the transportation needs of the dump trucks. The slope of the outer side of the cofferdam facing the water is 1:0.75, and the slope of the inner side facing the water is 1:0.

3. The top width of the cofferdam is 60cm and it is at least 50cm above the water surface; S3~After the cofferdam is set up, the ditch and pond drainage begins, and large-diameter water pumps are used to continuously drain the water out of the roadbed; S4~Drainage is carried out by backhoe excavator and transported to the designated location by dump truck. The desilting sequence is carried out in sections according to the sequence of drainage completion; S5~After the dredging is completed, the bottom of the ditch is leveled by manual labor and machinery, and the slope is dug into steps no less than 1m wide. The bottom of the ditch is backfilled with 30cm of treated slag and silt, and compacted with a roller until there are no obvious wheel marks; S6~using the above-mentioned sludge solidifying agent adding device to add the solidifying agent into the sludge, adding the admixture into the sludge, and then using a rotary tiller and a land grader to mix the sludge; S7~After the land is leveled by the grader, when the moisture content is close to or slightly higher than the optimum moisture content of about 2%, the machine can be organized for compaction.

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