Pipe jacking construction deep hole grouting device and method

Abstract

The application belongs to the technical field of pipe jacking construction, in particular to a pipe jacking construction deep hole grouting device and method; the device is characterized by the setting of a standing barrel, a thick mud outlet and a floating cover plate; bentonite, water and sand are used as raw materials to prepare thick mud, the prepared thick mud is poured into the standing barrel, the floating cover plate is placed in the top inner circle of the standing barrel and floats above the liquid surface of the thick mud, thereby reducing the evaporation rate of water in the thick mud, after the thick mud is left for 24 hours, the inlet end of the thick mud pump is connected to the thick mud outlet, the thick mud is pumped out of the standing barrel, injected into the flower pipe in the deep hole grouting hole reserved in the pipe jacking through the pipeline, and filled into the gap between the pipe jacking and the tunnel; the floating cover plate blocks the evaporation rate of the thick mud, reduces the concentration change of the thick mud, improves the preparation quality of the thick mud, improves the grouting effect, reduces the load of the thick mud pump and prolongs the service life of the thick mud pump.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pipe jacking construction, and particularly relates to a pipe jacking construction deep hole grouting device and method. BACKGROUND

[0002] Pipe jacking construction is a pipe laying construction technology without or with less excavation; the pipe jacking method construction uses the jacking force generated by jacking equipment to jacking the pipe into the soil and transports the earthwork away; after one pipe section is jacked into the soil layer, the second pipe section is lowered to continue jacking; the pipe jacking construction reduces the damage to urban buildings and road traffic congestion, and highlights its advantages in stable soil layer and environmental protection; during the pipe jacking construction process, due to the large cross section of the pipe jacking machine, the front end resistance is large, when the pipe jacking machine and the pipe section retreat, the earth pressure balance between the machine head and the front soil body is destroyed, the soil surface cannot be stably supported, and the soil body in front of the machine head is prone to collapse; if no certain measures are taken, the settlement of the road surface and the pipeline will be difficult to control; generally, the measures are to control the earth removal amount of each section to reduce the ground settlement; if the earth removal amount is not well controlled or the ground settlement exceeds the limit, the conventional method in the pipe jacking construction is difficult to control the ground settlement; in order to solve the difficult-to-control settlement in the pipe jacking construction, a method of using the pipe section to perform deep hole grouting of mud in the pipe jacking is proposed, which can not only control the ground settlement in the pipe jacking, but also adjust the pipe jacking posture.

[0003] A Chinese patent with the publication number CN110864162A discloses a mud sandstone geology pipe jacking construction process, which adopts a thixotropic mud system to inject thixotropic mud to the periphery of a concrete pipe; the concrete pipe includes a plurality of pipe sections, a mud sleeve is arranged on the pipe section at the head, and mud sleeves are arranged on the intermediate pipe sections at intervals; the mud sleeve is distributed with grouting holes in the periphery; the thixotropic mud system includes a grouting pump and a grouting pipeline; when grouting, the grouting material is mixed with water to form the required slurry, and the slurry is used after being left for 24 hours, and then the grouting pump is used for grouting; during the grouting process, the grouting pressure is controlled to be 1.1-1.2 times of the water depth by using a pressure gauge and a flowmeter, and the grouting amount is controlled; the grouting pipeline includes a main pipe and a plurality of branch pipes connected with the main pipe; the branch pipes convey the slurry sent by the main pipe to each grouting hole.

[0004] Before grouting, the thick mud slurry needs to be prepared, and after the preparation is completed, it needs to be left for 24 hours; however, during the leaving, the water in the thick mud slurry gradually evaporates, especially in hot weather, too much water evaporates during the leaving of the thick mud slurry, which increases the concentration of the thick mud slurry, reduces the grouting effect, and even increases the load of the thick mud pump, affecting the normal work of the thick mud pump.

[0005] To this end, the application provides a pipe jacking construction deep hole grouting device and method. SUMMARY

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical scheme adopted by the application to solve the technical problems is: the pipe jacking construction deep hole grouting device comprises a static barrel, a thick mud outlet and a floating cover plate; the inside of the static barrel is filled with prepared thick mud, the bottom of the outer wall of the static barrel is fixedly connected with the thick mud outlet, the outer wall of the thick mud outlet penetrates the outer wall of the static barrel, the thick mud outlet is connected with a thick mud pump, and the inner ring of the top of the static barrel is slidingly installed with the floating cover plate; in order to solve the difficult-to-control settlement in pipe jacking construction, the method of deep hole thick mud injection is used to control ground settlement in pipe jacking and to adjust the attitude of the pipe; thick mud needs to be prepared before grouting, and needs to be static for a period of time after preparation, but the water in the thick mud will gradually evaporate during the static period, especially in hot weather, too much water in the thick mud evaporates during the static period, which increases the concentration of the thick mud, reduces the grouting effect, and even increases the load of the thick mud pump, affecting the normal work of the thick mud pump; during work, bentonite, water and sand are used as raw materials to prepare mud with a concentration of 30%-40% and a sand content of 42%, and the consistency of the thick mud is 40mm-50mm, which is in a non-flowing and cement state, the prepared thick mud is poured into the static barrel, the floating cover plate is placed on the inner ring of the top of the static barrel, and the floating cover plate floats above the liquid surface of the thick mud, which reduces the evaporation rate of water in the thick mud, after the thick mud is static for 24 hours, the inlet end of the thick mud pump is connected with the thick mud outlet, the thick mud is pumped out of the static barrel through the pipeline and injected into the flower pipe in the deep hole grouting hole reserved in the pipe, and the thick mud is injected into the gap between the pipe and the tunnel; the floating cover plate blocks the evaporation rate of the thick mud, reduces the concentration change of the thick mud, improves the configuration quality of the thick mud, improves the grouting effect, and at the same time, reduces the load of the thick mud pump and prolongs the service life of the thick mud pump.

[0008] Preferably, the middle part of the floating cover plate is fixedly connected with a circular shell, the outer wall of the circular shell penetrates the floating cover plate, the bottom inner ring of the circular shell is slidably connected with a slide column, the bottom surface of the slide column is fixedly connected with a circular plate, the diameter of the circular plate is larger than that of the slide column, the top of the circular shell is connected with a threaded pipe, the top of the slide column is provided with a ball slot, a plurality of arc-shaped holes are formed around the middle part of the slide column, the inner ends of the arc-shaped holes are connected with the bottom of the ball slot, and the outer ends of the arc-shaped holes penetrate the outer wall of the slide column; in working, the top inner ring of the static barrel is placed with the floating cover plate, the circular plate contacts the liquid surface of the thick mud, the floating cover plate is lifted, and a space is formed between the liquid surface of the thick mud and the floating cover plate; when the thick mud is static, the gas in the thick mud is gradually discharged and released upwards, the discharged gas enters the ball slot through the arc-shaped hole, and then is discharged through the threaded pipe, so that the water evaporation in the thick mud is reduced, and the static effect of the thick mud is improved; when the thick mud in the static barrel is used up, the water outlet of the high-pressure water pump is connected with the threaded pipe, high-pressure water flow is introduced into the threaded pipe, the water flow is sprayed after passing through the ball slot and the arc-shaped hole, the high-speed water flow washes the inner wall of the static barrel and the bottom surface of the floating cover plate, the water flow mixes the residual thick mud in the static barrel and is discharged from the thick mud outlet, so that the cleaning degree of the static barrel is improved, and then the staff can conveniently perform the thick mud configuration and static work again.

[0009] Preferably, the inner wall of the ball slot is fixedly connected with a plurality of arc-shaped supporting rods, the top ends of the arc-shaped supporting rods are fixedly connected with a fan blade, and the diameter of the fan blade is larger than that of the ball slot; in working, when the water flow passes through the ball slot, the water flow passes through the fan blade, pushes the fan blade to rotate, drives the slide column to rotate, and makes the water flow rotating through the arc-shaped hole wash the inner wall of the static barrel, so that the cleaning effect of the inner wall of the static barrel is further improved.

[0010] Preferably, the top surface of the circular plate is inlaid with a plurality of annular sealing rings, and the top ends of the annular sealing rings are located below the bottom ends of the arc-shaped holes; in working, when the pressure in the static barrel is too large or the top of the floating cover plate is pressed, the circular plate is forced to push the slide column to slide into the inside of the circular shell, so that the top surface of the circular plate is attached to the bottom surface of the floating cover plate, the annular sealing ring seals between the top surface of the circular plate and the bottom surface of the floating cover plate, and the thick mud is blocked from entering the inside of the circular shell, so that the probability that the thick mud blocks the arc-shaped hole and affects the rotation of the fan blade is reduced.

[0011] Preferably, the bottom surface of the floating cover plate is fixed with an elastic ring plate, the cross section of the elastic ring plate is half of a crescent, and the bottom outer wall of the elastic ring plate is in sliding fit with the inner wall of the static barrel; during operation, the thick slurry liquid surface in the static barrel gradually decreases along with the operation of the thick slurry pump, so that the floating cover plate slides downward under the action of its own gravity, pushes the elastic ring plate to slide along the inner wall of the static barrel, and scrapes off the thick slurry attached to the inner wall of the static barrel, thereby improving the utilization rate of the thick slurry; at the same time, cooperating with the scouring of the water flow, the cleaning degree of the inside of the static barrel is further improved.

[0012] Preferably, the outer circle of the floating cover plate is provided with a plurality of sliding grooves, a sliding block is slidingly installed in the sliding groove, the top of one side of the sliding block close to the inner wall of the static barrel and the bottom are both inverted arc angles, a spring is fixed between the other side of the sliding block away from the inner wall of the static barrel and the inner wall of the sliding groove, a plurality of limiting holes are formed in the inner wall of the sliding groove, a limiting rod is slidingly installed in the limiting hole, the limiting rod is fixed with the sliding block, a sliding hole is formed in the bottom of the sliding groove and the inside of the elastic ring plate, a plurality of arc-shaped plates are inlaid in the inside of the elastic ring plate, the arc-shaped plates are annularly arranged, a receiving groove is formed in the bottom surface of the sliding block, a pull rope is fixed between the inner wall of the receiving groove and the middle part of the arc-shaped plate, and the pull rope slidingly penetrates the sliding hole; during operation, when the floating cover plate is not installed in the inside of the static barrel, the sliding block slides out of the sliding groove under the action of the elastic force of the spring, drives the limiting rod to slide from the limiting hole to the sliding groove, limits the sliding block from separating from the sliding groove through the limiting rod, at this time, the pull rope is in a relaxed state, the elastic ring plate bends to the middle part of the floating cover plate under the action of its own elastic force, and at this time, the outer diameter of the elastic ring plate is smaller than the diameter of the floating cover plate; when the floating cover plate is installed in the inside of the static barrel, the sliding block is pushed into the sliding groove by the inner wall of the static barrel, pushes the spring to compress, the sliding block pulls the pull rope to slide out of the sliding hole, the pull rope is clamped in the receiving groove, thereby reducing the influence of the pull rope on the sliding of the sliding block, the pull rope pulls the arc-shaped plate close to the inner wall of the static barrel, drives the elastic ring plate to bend and stretch towards the inner wall of the static barrel, so that the elastic ring plate is pressed to contact the inner wall of the static barrel, and the cleaning work of the inner wall of the static barrel is realized; thereby facilitating the installation of the floating cover plate by the staff and reducing the influence of the elastic ring plate on the installation of the floating cover plate.

[0013] Preferably, the inner circle bottom of the standing barrel is fixedly connected with a base, a funnel-shaped groove is formed in the middle of the base, the thick slurry outlet is communicated with the middle part of the vertical groove of the funnel-shaped groove, a sealing block is slidably installed at the bottom of the vertical groove of the funnel-shaped groove, a screw rod is fixedly connected to the bottom of the sealing block, the screw rod penetrates through the bottom wall of the standing barrel and is threadedly connected with the bottom wall of the standing barrel; during operation, before adding thick slurry into the standing barrel for standing, the screw rod is twisted to push the sealing block to slide upwards, thereby blocking the thick slurry outlet, so that the probability of thick slurry flowing out of the thick slurry outlet is reduced; before the thick slurry pump is operated, the screw rod is twisted to drive the sealing block to slide downwards, thereby exposing the thick slurry outlet, and the thick slurry enters the thick slurry outlet through the funnel-shaped groove, so that the discharge rate of the thick slurry is improved, and the utilization rate of the thick slurry is improved.

[0014] Preferably, the top outer circle of the standing barrel is fixedly connected with a plurality of inlaid bases, an installation groove is formed in the side of the standing barrel close to the inlaid bases, a baffle is slidably installed in the installation groove, a straight groove is formed in the top surface of the installation groove, a locking bolt is threadedly installed on the top surface of the baffle, the locking bolt slidably penetrates through the straight groove, and a plurality of gaskets are sleeved on the outer circle of the locking bolt; during operation, after the floating cover plate is installed in the inside of the standing barrel, the locking bolt is pushed to slide along the straight groove, thereby driving the baffle to slide out of the installation groove, the baffle is tightly fixed by tightening the locking bolt, and the floating cover plate is prevented from separating from the standing barrel by the baffle, so that the safety of the thick slurry during standing is further improved.

[0015] A pipe jacking construction deep hole grouting method, which is applicable to the pipe jacking construction deep hole grouting device and comprises the following steps:

[0016] S1: during production of pipe sections, 4 radial deep hole grouting ports are embedded in the top of each pipe section, and the diameter of the grouting port is 60mm, without affecting other grouting functions;

[0017] S2: thick mud is configured, bentonite, water and sand are used as raw materials, 30%-40% concentration mud is configured, the sand content is 42%, the consistency of the thick mud is 40mm-50mm, the thick mud is in a non-flowing and cement state, the thick mud is placed in the standing barrel for standing for 24 hours, and water is fully saturated;

[0018] S3: a flower pipe is punched into the deep hole grouting hole of the pipe section, the depth is 1.5m-2m, the thick mud pump is used for grouting, the grouting pressure is not greater than 0.6MPa, and the settlement is controlled, and the thick mud does not adversely affect the pipe jacking.

[0019] The pipe jacking construction deep hole grouting method has the following beneficial effects:

[0020] 1. The deep hole grouting device and method for pipe jacking construction, through the setting of the static barrel, the thick mud outlet and the floating cover plate; the bentonite, water and sand are used as raw materials, 30%-40% concentration of mud is mixed with 42% sand content, and the consistency of the thick mud is 40mm-50mm, the thick mud is in a non-flowing and cement state, the prepared thick mud is poured into the static barrel, the floating cover plate is placed in the top inner circle of the static barrel, the floating cover plate floats above the liquid surface of the thick mud, the evaporation rate of the water in the thick mud is reduced, after the thick mud is static for 24 hours, the inlet end of the thick mud pump is connected with the thick mud outlet, the thick mud is pumped out from the static barrel and injected into the flower pipe in the deep hole grouting hole reserved in the pipe, and the thick mud is injected into the gap between the pipe and the tunnel; the evaporation rate of the thick mud is blocked by the floating cover plate, the concentration change of the thick mud is reduced, the configuration quality of the thick mud is improved, the grouting effect is improved, meanwhile, the load of the thick mud pump is reduced, and the service life of the thick mud pump is prolonged.

[0021] 2. The deep hole grouting device and method for pipe jacking construction, through the setting of the round shell, the slide column, the round plate and the threaded pipe; after the round plate contacts the liquid surface of the thick mud, the floating cover plate is lifted up, so that there is space between the liquid surface of the thick mud and the floating cover plate, when the thick mud is static, the gas in the thick mud is gradually discharged and released upwards, the discharged gas is discharged through the arc-shaped hole and the threaded pipe, the water evaporation in the thick mud is reduced, and the static effect of the thick mud is improved; when the thick mud in the static barrel is used up, the water outlet of the high-pressure water pump is connected with the threaded pipe, the water flow is sprayed after passing through the ball slot and the arc-shaped hole, the high-speed water flow washes the inner wall of the static barrel and the bottom surface of the floating cover plate, the water flow mixes the residual thick mud in the static barrel and discharges the thick mud from the thick mud outlet, so that the cleaning degree of the static barrel is improved, and then the staff can conveniently carry out the thick mud configuration and static work again. BRIEF DESCRIPTION OF DRAWINGS

[0022] The application will be further described below in combination with the drawings.

[0023] Figure 1 is a perspective view of the embodiment one of the application;

[0024] Figure 2 is a sectional view of the embodiment one of the application;

[0025] Figure 3 is Figure 2 is a local enlarged view of A in the figure;

[0026] Figure 4 is Figure 2 is a local enlarged view of B in the figure;

[0027] Figure 5 is Figure 3 is a sectional view of C-C in the figure;

[0028] Figure 6 is a sectional view of the elastic ring plate of embodiment two of the present application;

[0029] Figure 7 is a flow chart of the grouting method of the present application;

[0030] In the figure: 1, stationary barrel; 2, thick mud outlet; 3, floating cover plate; 4, round shell; 5, slide column; 6, round plate; 7, threaded pipe; 8, ball slot; 9, arc hole; 10, arc support; 11, fan blade; 12, annular sealing ring; 13, elastic ring plate; 14, sliding groove; 15, sliding block; 16, spring; 17, limiting hole; 18, limiting rod; 19, sliding hole; 20, arc plate; 21, receiving groove; 22, pull rope; 23, base; 24, funnel-shaped groove; 25, sealing block; 26, screw rod; 27, inlay base; 28, mounting groove; 29, baffle; 30, straight groove; 31, locking bolt; 32, long strip-shaped magnet; 33, spherical magnet. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0032] Embodiment one

[0033] As Figures 1 to 2The embodiment of the application discloses a deep-hole grouting device for pipe jacking construction, which comprises a static barrel 1, a thick slurry outlet 2 and a floating cover plate 3. The inside of the static barrel 1 is filled with prepared thick slurry, the bottom of the outer wall of the static barrel 1 is fixedly connected with the thick slurry outlet 2, the outer wall of the thick slurry outlet 2 penetrates the outer wall of the static barrel 1, the thick slurry outlet 2 is connected with a thick slurry pump, and the floating cover plate 3 is slidably installed on the top inner ring of the static barrel 1. The method of using pipe sections to perform deep-hole thick slurry injection can control ground subsidence in pipe jacking construction and also can adjust the posture of the pipe. The thick slurry needs to be prepared before grouting and needs to be statically placed for 24 hours after preparation. However, the water in the thick slurry evaporates gradually during the static placement, especially in hot weather. The excessive water evaporation during the static placement of the thick slurry increases the concentration of the thick slurry, reduces the grouting effect, and even increases the load of the thick slurry pump, affecting the normal work of the thick slurry pump. During work, bentonite, water and sand are used as raw materials to prepare thick slurry with a concentration of 30%-40% and a sand content of 42%, and the consistency of the thick slurry is 40mm-50mm, that is, the thick slurry is in a non-flowing and cement state. The prepared thick slurry is poured into the static barrel 1, the floating cover plate 3 is placed on the top inner ring of the static barrel 1, the floating cover plate 3 floats above the liquid surface of the thick slurry, the evaporation rate of the water in the thick slurry is reduced, the inlet end of the thick slurry pump is connected with the thick slurry outlet 2 after the thick slurry is statically placed for 24 hours, the thick slurry is pumped out of the static barrel 1 through a pipeline and injected into a flower pipe reserved in a deep-hole grouting hole of the pipe, and the thick slurry is injected into the gap between the pipe and the tunnel. The floating cover plate 3 blocks the evaporation rate of the thick slurry, reduces the concentration change of the thick slurry, improves the configuration quality of the thick slurry, improves the grouting effect, reduces the load of the thick slurry pump, and prolongs the service life of the thick slurry pump.

[0034] As Figure 2 , Figure 3 and Figure 5As shown in the figure, the middle part of the floating cover plate 3 is fixed with a round shell 4, the outer wall of the round shell 4 penetrates the floating cover plate 3, the bottom inner ring of the round shell 4 is slidingly installed with a slide column 5, the bottom surface of the slide column 5 is fixed with a round plate 6, the diameter of the round plate 6 is larger than the diameter of the slide column 5, the top of the round shell 4 is communicated with a threaded pipe 7, the top of the slide column 5 is provided with a ball slot 8, the middle part of the slide column 5 is surrounded by a plurality of arc-shaped holes 9, the inner ends of the plurality of arc-shaped holes 9 are communicated with the bottom of the ball slot 8, and the outer ends of the plurality of arc-shaped holes 9 penetrate the outer wall of the slide column 5; in working, the top inner ring of the static barrel 1 is placed with the floating cover plate 3, because the density of the thick mud slurry is large, the round plate 6 contacts the liquid surface of the thick mud slurry, the floating cover plate 3 is lifted up, and there is a space between the liquid surface of the thick mud slurry and the floating cover plate 3, when the thick mud slurry is static, the gas in the thick mud slurry is gradually discharged and released upwards, the discharged gas enters the ball slot 8 through the arc-shaped hole 9, and then is discharged through the threaded pipe 7, thereby reducing the water evaporation in the thick mud slurry and improving the static effect of the thick mud slurry; when the thick mud slurry in the static barrel 1 is used up, the water outlet of the high-pressure water pump is communicated with the threaded pipe 7, the high-pressure water flow is introduced into the inside of the threaded pipe 7, the water flow is sprayed after passing through the ball slot 8 and the arc-shaped hole 9, and the high-speed water flow flushes the inner wall of the static barrel 1 and the bottom surface of the floating cover plate 3, the water flow mixes the residual thick mud slurry in the static barrel 1 and is discharged from the thick mud slurry outlet 2, thereby improving the cleaning degree of the static barrel 1, and then facilitating the staff to perform the thick mud slurry configuration and static work again.

[0035] As shown in the figure, Figure 3 The inner wall of the ball slot 8 is surrounded by a plurality of arc-shaped supporting rods 10, the top ends of the plurality of arc-shaped supporting rods 10 are fixed with a fan blade 11, and the diameter of the fan blade 11 is larger than the diameter of the ball slot 8; in working, the water flow passes through the fan blade 11 when passing through the ball slot 8, pushes the fan blade 11 to rotate, drives the slide column 5 to rotate, and makes the water flow rotating through the arc-shaped hole 9 to flush the inner wall of the static barrel 1, thereby further improving the cleaning effect of the inner wall of the static barrel 1.

[0036] As shown in the figure, Figure 3 And Figure 5 The top surface of the round plate 6 is inlaid with a plurality of annular sealing rings 12, and the top ends of the annular sealing rings 12 are located below the bottom ends of the arc-shaped holes 9; in working, when the pressure in the static barrel 1 is too large or the top of the floating cover plate 3 is pressed, the round plate 6 pushes the slide column 5 to slide into the inside of the round shell 4, the top surface of the round plate 6 is attached to the bottom surface of the floating cover plate 3, the annular sealing ring 12 seals between the top surface of the round plate 6 and the bottom surface of the floating cover plate 3, and the thick mud slurry is blocked from entering the inside of the round shell 4, thereby reducing the probability of the thick mud slurry blocking the arc-shaped hole 9 and affecting the rotation of the fan blade 11.

[0037] As shown in the figure, Figure 2 And Figure 4As shown, an elastic ring plate 13 is fixedly connected to the outer ring of the bottom surface of the floating cover plate 3. The cross-section of the elastic ring plate 13 is crescent-shaped, and the bottom outer wall of the elastic ring plate 13 slides in fit with the inner wall of the settling tank 1. During operation, the level of the concentrated mud slurry inside the settling tank 1 gradually decreases with the operation of the concentrated mud pump, causing the floating cover plate 3 to slide downward under its own gravity, pushing the elastic ring plate 13 to slide against the inner wall of the settling tank 1, scraping off the concentrated mud slurry adhering to the inner wall of the settling tank 1, thereby improving the utilization rate of the concentrated mud slurry. At the same time, in conjunction with the flushing of water flow, the cleanliness of the inside of the settling tank 1 is further improved.

[0038] like Figure 4 As shown, the outer ring of the floating cover plate 3 has multiple sliding grooves 14, and a slider 15 is slidably installed inside the sliding groove 14. The top and bottom of the side of the slider 15 near the inner wall of the settling tank 1 are both rounded. A spring 16 is fixed between the side of the slider 15 away from the inner wall of the settling tank 1 and the inner wall of the sliding groove 14. The inner wall of the sliding groove 14 has multiple limiting holes 17, and a limiting rod 18 is slidably installed inside the limiting hole 17. The limiting rod 18 is fixedly connected to the slider 15. Both the bottom of the groove 14 and the interior of the elastic ring plate 13 are provided with sliding holes 19. Multiple arc-shaped plates 20 are inlaid around the interior of the elastic ring plate 13, forming a circular ring. The bottom surface of the slider 15 is provided with a receiving groove 21. A pull rope 22 is fixed between the inner wall of the receiving groove 21 and the middle of the arc-shaped plate 20, and the pull rope 22 slides through the sliding hole 19. During operation, when the floating cover plate 3 is not inserted into the stationary bucket 1, the slider 15 slides out under the elastic force of the spring 16. Inside the slide groove 14, the limiting rod 18 slides from the limiting hole 17 into the slide groove 14, restricting the slider 15 from disengaging from the slide groove 14. At this time, the pull rope 22 is in a slack state, and the elastic ring plate 13 bends towards the middle of the floating cover plate 3 under its own elastic force. At this time, the outer diameter of the elastic ring plate 13 is smaller than the diameter of the floating cover plate 3. When the floating cover plate 3 is installed inside the settling tank 1, the slider 15 is pushed into the slide groove 14 by the inner wall of the settling tank 1, pushing the spring 16 to compress, and the slider... Pulling the pull rope 22 causes it to slide out of the sliding hole 19 and into the storage groove 21, thus reducing the impact of the pull rope 22 on the sliding of the slider 15. The pull rope 22 pulls the arc plate 20 closer to the inner wall of the settling tank 1, causing the elastic ring plate 13 to bend and stretch towards the inner wall of the settling tank 1, so that the elastic ring plate 13 presses and contacts the inner wall of the settling tank 1, realizing the cleaning work of the inner wall of the settling tank 1; thus facilitating the installation of the floating cover plate 3 by the staff and reducing the impact of the elastic ring plate 13 on the installation of the floating cover plate 3.

[0039] like Figure 2As shown, the inner circle bottom of the standing barrel 1 is fixed with a base 23, the middle part of the base 23 is provided with a funnel-shaped groove 24, the thick mud outlet 2 communicates with the vertical groove middle part of the funnel-shaped groove 24, the vertical groove bottom of the funnel-shaped groove 24 is slidably installed with a sealing block 25, the bottom of the sealing block 25 is fixedly connected with a screw rod 26, the screw rod 26 penetrates the bottom wall of the standing barrel 1 and is threadedly connected with the bottom wall of the standing barrel 1; When the thick mud is added into the standing barrel 1 for standing, the screw rod 26 is twisted to push the sealing block 25 to slide upward, and the thick mud outlet 2 is blocked, thereby reducing the probability of thick mud flowing out of the thick mud outlet 2; When the thick mud pump is working, the screw rod 26 is twisted to drive the sealing block 25 to slide downward, and the thick mud outlet 2 is exposed, so that the thick mud flows into the thick mud outlet 2 through the funnel-shaped groove 24, the discharge rate of the thick mud is improved through the funnel-shaped groove 24, and the utilization rate of the thick mud is improved.

[0040] As shown in Figures 1 to 2 The top outer circle of the standing barrel 1 is fixedly connected with a plurality of inlaid bases 27, the inlaid bases 27 are provided with installation grooves 28 near one side of the standing barrel 1, the installation grooves 28 are slidably installed with baffle plates 29, the top surface of the installation grooves 28 is provided with straight grooves 30, the top surface of the baffle plates 29 is threadedly installed with locking bolts 31, the locking bolts 31 slidably penetrate the straight grooves 30, and the outer circle of the locking bolts 31 is sleeved with a plurality of gaskets; After the floating cover plate 3 is installed in the inside of the standing barrel 1, the locking bolts 31 are pushed to slide along the straight grooves 30, the baffle plates 29 are driven to slide out of the installation grooves 28, the locking bolts 31 are tightened to fix and lock the baffle plates 29, and the floating cover plate 3 is blocked from separating from the standing barrel 1 by the baffle plates 29, thereby further improving the safety during the standing of the thick mud.

[0041] As shown in Figure 7 A top pipe construction deep hole grouting method, which is applicable to the top pipe construction deep hole grouting device, and comprises the following steps:

[0042] S1: During the production of pipe sections, 4 radial deep hole grouting ports are pre-buried at the top of each pipe section, and the diameter of the grouting port is 60mm, which does not affect other grouting functions;

[0043] S2: The thick mud is configured by using bentonite, water and sand as raw materials, and the mud concentration is 30%-40% and the sand content is 42%, and the consistency of the thick mud is 40mm-50mm, which is in a non-flowing and cement state. The thick mud is placed in the standing barrel 1 for standing for 24 hours to fully saturate the water.

[0044] S3: The flower pipe is punched into the pipe section deep hole grouting hole at a depth of 1.5m-2m, the thick mud pump is used for grouting, the grouting pressure is not greater than 0.6MPa, and the settlement is controlled. This thick mud does not adversely affect the top pipe tunneling.

[0045] Example two

[0046] As shown in Figure 6 Example one, another embodiment of the present application is that the top of the receiving groove 21 is inlaid with a long strip-shaped magnet 32, the inside of the pull rope 22 is uniformly provided with a plurality of spherical magnets 33, and the long strip-shaped magnet 32 and the spherical magnet 33 are attracted to each other; in operation, the sliding block 15 slides into the sliding groove 14, the sliding block 15 pulls the pull rope 22 to slide out of the sliding hole 19, the pull rope 22 is clamped into the receiving groove 21, so that the spherical magnet 33 is attracted to the long strip-shaped magnet 32, thereby reducing the probability of the pull rope 22 from the receiving groove 21, and further reducing the influence of the pull rope 22 on the sliding of the sliding block 15.

[0047] In operation: to solve the difficult-to-control settlement in pipe jacking construction, the method of using pipe joints to carry out deep hole thick mud injection is used to control ground settlement in pipe jacking, and the attitude of the pipe jacking can also be adjusted; before grouting, thick mud slurry needs to be prepared, and after preparation, it needs to be left for 24 hours, but the water in the thick mud slurry will gradually evaporate during the standing, especially in hot weather, too much water in the thick mud slurry evaporates during standing, which increases the concentration of the thick mud slurry, reduces the grouting effect, and even increases the load of the thick mud pump, affecting the normal work of the thick mud pump;

[0048] When the thick slurry is added to the static barrel 1, the screw 26 is twisted to push the sealing block 25 to slide upwards to block the thick slurry outlet 2; the bentonite, water and sand are used as raw materials to prepare the thick slurry with a concentration of 30%-40% and a sand content of 42%, and the thick slurry has a consistency of 40mm-50mm, that is, the thick slurry is in a non-flowing and cement state; the prepared thick slurry is poured into the static barrel 1; when the floating cover plate 3 is not installed in the static barrel 1, the sliding block 15 slides out of the sliding groove 14 under the elastic force of the spring 16, drives the limiting rod 18 to slide from the limiting hole 17 to the sliding groove 14, and limits the sliding block 15 from separating from the sliding groove 14 through the limiting rod 18; at this time, the pull rope 22 is in a relaxed state, and the elastic ring plate 13 is bent towards the middle of the floating cover plate 3 under the elastic force of itself; the floating cover plate 3 is installed in the static barrel 1, the sliding block 15 is pushed into the sliding groove 14 by the inner wall of the static barrel 1, the spring 16 is compressed, the sliding block 15 pulls the pull rope 22 to slide out of the sliding hole 19, the pull rope 22 is clamped into the storage groove 21, the influence of the pull rope 22 on the sliding of the sliding block 15 is reduced, the pull rope 22 pulls the arc-shaped plate 20 close to the inner wall of the static barrel 1, drives the elastic ring plate 13 to bend and stretch towards the inner wall of the static barrel 1, and makes the elastic ring plate 13 press and contact the inner wall of the static barrel 1; the locking bolt 31 is pushed to slide along the straight groove 30, drives the baffle 29 to slide out of the installation groove 28, the locking bolt 31 is tightened to fix and lock the baffle 29; the evaporation rate of the thick slurry is blocked by the floating cover plate 3, the concentration change of the thick slurry is reduced, the preparation quality of the thick slurry is improved, the grouting effect is improved, the load of the thick slurry pump is reduced, and the service life of the thick slurry pump is prolonged;

[0049] At the same time, due to the large density of the thick slurry, when the circular plate 6 contacts the liquid surface of the thick slurry, the floating cover plate 3 is lifted, and there is a space between the liquid surface of the thick slurry and the floating cover plate 3; when the thick slurry is static, the gas in the thick slurry is gradually discharged and released upwards, the discharged gas enters the ball slot 8 through the arc-shaped hole 9, and then is discharged through the threaded pipe 7, thereby reducing the evaporation of water in the thick slurry and improving the static effect of the thick slurry;

[0050] After the thick slurry is static for 24 hours, the inlet end of the thick slurry pump is communicated with the thick slurry outlet 2, the screw 26 is twisted to drive the sealing block 25 to slide downwards, the thick slurry outlet 2 is exposed, the thick slurry enters the thick slurry outlet 2 through the funnel-shaped groove 24, the thick slurry pump pumps the thick slurry out of the static barrel 1 and injects it into the flower pipe in the deep hole grouting hole reserved in the pipe jacking, and the thick slurry is injected into the gap between the pipe jacking and the tunnel; at the same time, the liquid surface of the thick slurry in the static barrel 1 gradually decreases with the working of the thick slurry pump, the floating cover plate 3 slides downwards under the gravity of itself, pushes the elastic ring plate 13 to slide along the inner wall of the static barrel 1, and scrapes off the thick slurry adhered to the inner wall of the static barrel 1, thereby improving the utilization rate of the thick slurry;

[0051] When the thick slurry in the static barrel 1 is used up, the outlet of the high-pressure water pump is communicated with the threaded pipe 7, the high-pressure water flow is introduced into the inside of the threaded pipe 7, when the water flow passes through the ball slot 8, the water flow passes through the fan blade 11, pushes the fan blade 11 to rotate, drives the slide column 5 to rotate, so that the water flow passing through the arc-shaped hole 9 rotates to wash the inner wall of the static barrel 1, the high-speed water flow washes the inner wall of the static barrel 1 and the bottom surface of the floating cover plate 3, the water flow mixes the residual thick slurry in the static barrel 1 and discharges from the thick slurry outlet 2, so that the cleaning degree of the static barrel 1 is improved, and then the staff can conveniently configure the thick slurry and carry out the static work again.

[0052] The above front, rear, left, right, top and bottom are based on the drawings of the specification Figure 1 The front of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and the like.

[0053] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the scope of protection of the present application.

[0054] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, the above examples and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A deep-hole grouting device for pipe jacking construction, characterized in that: It includes a settling tank (1), a concentrated mud outlet (2), and a floating cover plate (3); the settling tank (1) is filled with prepared concentrated mud, the concentrated mud outlet (2) is fixedly connected to the bottom of the outer wall of the settling tank (1), and the outer wall of the concentrated mud outlet (2) penetrates the outer wall of the settling tank (1). The concentrated mud outlet (2) is connected to a concentrated mud pump, and the floating cover plate (3) is slidably installed on the inner ring of the top of the settling tank (1). A circular shell (4) is fixedly connected to the middle of the floating cover plate (3). The outer wall of the circular shell (4) penetrates the floating cover plate (3). A sliding column (5) is slidably installed on the inner ring of the bottom of the circular shell (4). A circular plate (6) is fixedly connected to the bottom surface of the sliding column (5). The diameter of the circular plate (6) is larger than the diameter of the sliding column (5). A threaded pipe (7) is connected to the top of the circular shell (4). A ball groove (8) is opened at the top of the sliding column (5). Multiple arc-shaped holes (9) are opened around the middle of the sliding column (5). The inner ends of the multiple arc-shaped holes (9) are connected to the bottom of the ball groove (8). The outer ends of the multiple arc-shaped holes (9) penetrate the outer wall of the sliding column (5). The bottom outer ring of the floating cover plate (3) is fixedly connected to an elastic ring plate (13). The cross section of the elastic ring plate (13) is a crescent shape, and the bottom outer wall of the elastic ring plate (13) slides in conjunction with the inner wall of the stationary bucket (1). The outer ring of the floating cover (3) is provided with multiple sliding grooves (14), and a slider (15) is slidably installed inside the sliding groove (14). The top and bottom of the side of the slider (15) near the inner wall of the stationary bucket (1) are both rounded. A spring (16) is fixed between the side of the slider (15) away from the inner wall of the stationary bucket (1) and the inner wall of the sliding groove (14). The inner wall of the sliding groove (14) is provided with multiple limiting holes (17), and a limiting rod (18) is slidably installed inside the limiting holes (17). The limiting rod (18) is fixedly connected to the slider (15). The bottom of the sliding groove (14) and the interior of the elastic ring plate (13) are both provided with sliding holes (19). Multiple arc plates (20) are embedded around the interior of the elastic ring plate (13). The multiple arc plates (20) are arranged in a circular ring. The bottom surface of the slider (15) is provided with a storage groove (21). A pull rope (22) is fixedly connected between the inner wall of the storage groove (21) and the middle part of the arc plate (20). The pull rope (22) slides through the sliding hole (19).

2. The deep hole grouting device for pipe jacking construction according to claim 1, characterized in that: The inner wall of the ball groove (8) is surrounded by a plurality of arc-shaped support rods (10), and the top of the plurality of arc-shaped support rods (10) is fixed with fan blades (11), the diameter of the fan blades (11) being larger than the diameter of the ball groove (8).

3. The deep hole grouting device for pipe jacking construction according to claim 2, characterized in that: The outer ring of the top surface of the circular plate (6) is inlaid with a plurality of annular sealing rings (12), the top of the annular sealing rings (12) being located below the bottom of the arc-shaped hole (9).

4. The deep hole grouting device for pipe jacking construction according to claim 1, characterized in that: The bottom of the inner ring of the settling tank (1) is fixedly connected to a base (23). A funnel-shaped groove (24) is provided in the middle of the base (23). The thick mud outlet (2) is connected to the middle of the vertical groove of the funnel-shaped groove (24). A sealing block (25) is slidably installed at the bottom of the vertical groove of the funnel-shaped groove (24). A screw (26) is fixedly connected to the bottom of the sealing block (25). The screw (26) penetrates the bottom wall of the settling tank (1) and is threadedly engaged with the bottom wall of the settling tank (1).

5. A deep-hole grouting device for pipe jacking construction according to claim 1, characterized in that: The top outer ring of the settling tank (1) is fixed with multiple inserts (27). The inserts (27) have an installation groove (28) on the side near the settling tank (1). A baffle (29) is slidably installed inside the installation groove (28). A straight groove (30) is opened on the top surface of the installation groove (28). A locking bolt (31) is threaded on the top surface of the baffle (29). The locking bolt (31) slides through the straight groove (30), and multiple washers are sleeved on the outer ring of the locking bolt (31).

6. The deep hole grouting device for pipe jacking construction according to claim 1, characterized in that: The top of the storage slot (21) is inlaid with a long strip magnet (32), and a plurality of spherical magnets (33) are evenly arranged inside the pull rope (22). The long strip magnet (32) and the spherical magnets (33) attract each other.

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