Underground diaphragm wall with deeply-buried pebble bed and construction method

Abstract

The invention relates to a deep-buried pebble bed underground diaphragm wall, a construction method and a deep-buried pebble bed underground diaphragm wall construction system. The deep-buried pebble bed underground diaphragm wall construction system comprises an H-shaped steel combined anti-streaming device, a detachable composite cleaning scraper steel plate device and a rapid mud parameter measuring device. The H-shaped steel combined anti-streaming device has the beneficial effects that the H-shaped steel combined anti-streaming device is adopted, when the side wall of the groove section collapses, the expansion rubber bag is tightly attached to the side wall of the groove section and the multi-path multi-angle dip angle plate, a concrete streaming channel is blocked, and construction safety is guaranteed; the detachable composite cleaning scraper steel plate device is adopted, sundries such as concrete adhered in the I-shaped steel joint are cleaned through the scraper, the sundries are collected into the sundries collecting box in a centralized mode through the cleaning brush, the defects of mud inclusion, slag inclusion, water leakage and the like in the follow-up process are avoided, and the construction quality is guaranteed.

Description

Technical Field

[0001] The invention belongs to the field of diaphragm wall construction, and particularly relates to a deep-buried pebble layer diaphragm wall and a construction method thereof. Background Art

[0002] With the rapid development of urban rail transit, diaphragm walls are widely used in the foundation pit support of various basic structures such as cut-off walls and retaining walls due to their advantages of large wall stiffness and good water-stop performance. The construction technology of ordinary diaphragm walls is relatively mature, but how to construct diaphragm walls under the complex geological conditions of deep-buried pebble layers is still an issue worthy of attention.

[0003] Diaphragm walls are connected in segments, and the segments are connected through joints. During the construction process of the commonly used H-shaped steel joints, concrete overflow often occurs at the joint parts, affecting the construction quality. In addition, it is very difficult for conventional scrapers to clean the concrete and other sundries adhering to the I-beam joints, and subsequent defects such as mud inclusion, slag inclusion, and water leakage are likely to occur. Moreover, after the bottom cleaning and slurry replacement are completed, when the traditional slurry sampler is used to detect the index of the bottom slurry sample, the measurement speed is slow and the slurry sampling operation is complex. In summary, it is very important to seek a construction method for deep-buried pebble layer diaphragm walls with high construction efficiency, low construction cost, and simple operation. Summary of the Invention

[0004] The purpose of the invention is to overcome the deficiencies in the prior art and provide a deep-buried pebble layer diaphragm wall and a construction method thereof.

[0005] This deep-buried pebble layer diaphragm wall construction system includes an H-shaped steel combined anti-overflow device, a detachable composite cleaning scraper steel plate device, and a rapid slurry parameter measuring device; the H-shaped steel combined anti-overflow device includes an H-shaped steel, a right-angle steel plate, and a rubber bladder bag; right-angle steel plates are symmetrically welded on the outer sides of the H-shaped steel flange plates, and several rubber bladder bags are connected to the inner sides of the right-angle steel plates; the detachable composite cleaning scraper steel plate device includes a scraper main body; the top of the scraper main body is connected to the grab bucket body through a connection hole; scrapers and cleaning brushes are provided on the side walls around the scraper main body; the rapid slurry parameter measuring device includes a slurry sampler barrel body, and an internal slurry sampling small barrel is provided in the slurry sampler barrel body, and the internal slurry sampling small barrel and the slurry sampler barrel body are on the same axis.

[0006] Preferably, horizontal steel bars are welded to one side inside the flange plate of the H-beam, and circular joint pipes are installed on the other side. The gap between the circular joint pipes and the H-beam is filled with sand-filled bags; several rib plates are arranged on the outside of the right-angle steel plate. The end of the rib plate is connected to an inclined plate, and the end of the right-angle steel plate is connected to an end plate; a plurality of positioning members are fixed inside the right-angle steel plate. The rubber bladder bag is arranged along the entire length of the right-angle steel plate. Fixing members are provided on the surface of the rubber bladder bag. The fixing members are connected to spring members, and a lock head is provided at the other end of the spring member. Positioning members are provided inside the right-angle steel plate, and the lock head is fixedly connected to the positioning members on the right-angle steel plate.

[0007] Preferably, several rubber bladder bags are provided inside the right-angle steel plate. Adjacent rubber bladder bags are connected by flexible connecting plates. Telescopic connecting ropes are provided on both sides of the flexible connecting plate. Hooks are provided on the rubber bladder bag, and the telescopic connecting ropes are fixed to the hooks of the rubber bladder bag; a grouting pipe is placed in the rubber bladder bag. The flexible connecting plate includes an upper top plate and a lower bottom plate. Several elastic small columns are evenly arranged between the upper top plate and the lower bottom plate, and plastic filler is filled between adjacent elastic small columns.

[0008] Preferably, the detachable composite cleaning scraper steel plate device includes a connecting rod, a threaded rod, and an arc-shaped chute; a connecting hole is provided at the top of the scraper main body and is connected to the grab bucket body. A toothed plate is installed at the bottom of the scraper main body. Scraper One and Scraper Two are arranged on the side of the scraper main body. Both Scraper One and Scraper Two are four-sided scrapers; a fixing frame is arranged between Scraper One and Scraper Two. Cleaning brushes are installed around the fixing frame. The middle of the cleaning brush penetrates through the threaded rod, and the end is slidably connected in the arc-shaped chute. The cleaning brush is connected to the threaded rod and the arc-shaped chute through a connecting rod; a dust suction head is provided at the end of the cleaning brush. A dust suction cross pipe is provided inside the connecting rod, and the end of the dust suction cross pipe is connected to a dust suction vertical pipe. The dust suction head and the dust suction cross pipe are connected.

[0009] Preferably, a spiral stirring paddle is provided at the bottom of the mud sampler barrel body through a limiting column. A limiting plate is provided at the end of the limiting column, and the spiral stirring paddle rotates up and down along the limiting column; Hoop clamps are provided on the periphery of the bottom and middle of the mud sampler barrel body. The arc-shaped shaft is connected to both sides of the mud sampler barrel body through the hoop clamp on the periphery of the bottom of the mud sampler barrel body; A pulley is installed at the bottom of the arc-shaped shaft, and a plurality of counterweight blocks are sleeved in the middle of the arc-shaped shaft. Each counterweight block includes two arc-shaped counterweight blocks, and the arc-shaped counterweight blocks are fixed by fixing rib plates. Support columns are reinforced between adjacent counterweight blocks; Hoisting ear plates are symmetrically provided on the hoop clamp on the periphery of the middle of the mud sampler barrel body, and hoisting ropes are installed inside the hoisting ear plates.

[0010] Preferably, a bucket cover is fitted to the top of the mud sampler barrel body. A fixing rod is provided at the top of the bucket cover, and a stretching rod is inserted at the top of the fixing rod. The lower end of the stretching rod is connected with an elastic connector. The stretching rod is connected with a telescopic rod through the elastic connector. The top end of the telescopic rod is inserted into the stretching rod, and the bottom end is connected with an inner slurry sampling bucket. A sliding rope is fixed between the bucket cover and the mud sampler barrel body. U-shaped limit pieces are provided on both sides of the inner slurry sampling bucket. A limit sleeve is provided at the bottom inside the mud sampler barrel body. The sliding rope passes through the U-shaped limit pieces and the limit sleeve. Partition plates are symmetrically provided on the inner wall of the mud sampler barrel body, and a sliding column is installed between the partition plates. A stirring device is provided on the sliding column.

[0011] The construction method of the diaphragm wall in the deep buried pebble layer by using this construction system for the diaphragm wall in the deep buried pebble layer includes the following steps:

[0012] Step 1: After the trench for the diaphragm wall is formed, install the H-shaped steel on the steel reinforcement cage and place it into the trench. Install the rubber bladder bag inside the right-angle steel plate, and inject cement slurry into the rubber bladder bag to make the H-shaped steel combined anti-bypass device fit the side wall of the trench section.

[0013] Step 2: After pouring the concrete for the H-shaped steel joint, install the detachable composite cleaning scraper steel plate device on the grab bucket body through the connection hole at the top of the scraper body, and then use the scraper to clean the sundries adhering inside the H-shaped steel joint.

[0014] Step 3: Hoist the mud parameter rapid measurement device into the trench. After the mud flows into the inner slurry sampling bucket, complete the mud sampling and detection. Then pour the concrete for the diaphragm wall.

[0015] Preferably, the mud parameter rapid measurement device includes a mud sampler barrel body, and an inner slurry sampling bucket is inside the mud sampler barrel body. The inner slurry sampling bucket is connected with a stretching rod. Hoisting ear plates are symmetrically provided on the periphery of the middle part of the mud sampler barrel body, and hoisting ropes are installed inside the hoisting ear plates. Partition plates are symmetrically provided on the inner wall of the mud sampler barrel body and a sliding column is installed, and an inner stirring device is evenly distributed on the sliding column. An external overflow hole is provided at the top of the mud sampler barrel body, and an internal overflow hole is provided at the top of the inner slurry sampling bucket. A sliding rope is fixed between the bucket cover and the mud sampler barrel body. An intelligent detection device is provided at the top of the bucket cover, and a detection groove is opened on the intelligent detection device.

[0016] Preferably, in Step 3, the stirring device performs a cyclic stirring movement up and down along the sliding column; lower the mud sampler barrel body through the hoisting rope and collect the mud by using the external overflow hole; keep the inner stirring device running, press down the stretching rod to make the inner slurry sampling bucket move downward along the sliding rope, and the mud enters the inner slurry sampling bucket through the internal overflow hole. Pull up the stretching rod to make the inner slurry sampling bucket move upward along the sliding rope, take out the inner slurry sampling bucket and place it in the detection groove of the intelligent detection device for detection.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1) The present invention adopts an H-shaped steel combined anti-bypass device. When encountering the situation of the side wall collapse of the groove section, the expansion rubber bladder bag is closely attached to the side wall of the groove section and the multi-path and multi-angle inclined plates, blocking the concrete bypass channel and ensuring the construction safety.

[0019] 2) The present invention adopts a detachable composite cleaning scraper steel plate device. The concrete and other sundries adhered to the I-beam joint are cleaned by the scraper, and the sundries are centrally collected into the sundry collection box by the cleaning brush, avoiding subsequent defects such as mud inclusion, slag inclusion, and water leakage, and ensuring the construction quality.

[0020] 3) The present invention adopts a rapid mud parameter measuring device. After the bottom cleaning and slurry replacement are completed, a slurry sampler with adjustable and easy operation is used to detect the three slurry indexes. When taking the slurry, the elastic connector is contracted and the telescopic rod is extended by pressing down the stretching rod, so that the internal slurry sampling bucket moves downward along the sliding rope, and the slurry enters the internal slurry sampling bucket through the internal overflow hole to complete the slurry sampling. The taken internal slurry sampling bucket is directly placed in the detection slot of the intelligent detection device for rapid detection, improving the slurry sampling and parameter measurement speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the H-shaped steel combined anti-bypass device when the rubber bladder bag is not inflated;

[0022] Figure 2 is a schematic diagram of the H-shaped steel combined anti-bypass device when the rubber bladder bag is inflated;

[0023] Figure 3 is a vertical layout schematic diagram when the rubber bladder bag is inflated;

[0024] Figure 4 is a vertical layout schematic diagram when the rubber bladder bag is not inflated;

[0025] Figure 5 is a cross-sectional view of the flexible connecting plate;

[0026] Figure 6 is a structural schematic diagram of the detachable composite cleaning scraper steel plate device;

[0027] Figure 7 is an internal connection schematic diagram of the dust suction head;

[0028] Figure 8 is a structural schematic diagram of the slurry sampler;

[0029] Figure 9 is a cross-sectional view of the slurry sampler.

[0030] Description of reference numerals: 1 - horizontal steel bar, 2 - H-shaped steel, 3 - end plate, 4 - inclined plate, 5 - rib plate, 6 - right-angle steel plate, 7 - filled sandbag, 8 - circular joint pipe, 9 - rubber bladder bag, 10 - positioning member, 11 - spring member, 12 - lock head, 13 - fixing member, 14 - flexible connecting plate, 15 - telescopic connecting rope, 16 - hook, 17 - elastic small column, 18 - plastic filler, 19 - upper top plate, 20 - lower bottom plate, 21 - toothed plate, 22 - scraper body, 23 - frame structure, 24 - scraper one, 25 - cleaning brush, 26 - dust suction head, 27 - scraper two, 28 - jack, 29 - debris collection box, 30 - limiting groove, 31 - connecting hole, 32 - slider, 33 - fixing frame, 34 - threaded rod, 35 - connecting rod, 36 - arc-shaped sliding groove, 37 - dust suction cross pipe, 38 - dust suction vertical pipe, 39 - pump, 40 - limiting plate, 41 - limiting column, 42 - spiral stirring paddle, 43 - pulley, 44 - arc-shaped counterweight, 45 - fixing rib plate, 46 - shaft, 47 - mud sampler barrel body, 48 - intelligent detection device, 49 - detection groove, 50 - tension rod, 51 - fixing rod, 52 - barrel cover, 53 - limiting sleeve, 54 - lifting rope, 55 - lifting ear plate, 56 - sliding rope, 57 - support column, 58 - hoop, 59 - U-shaped limiting member, 60 - partition board, 61 - sliding column, 62 - stirring device, 63 - elastic connecting head, 64 - telescopic rod, 65 - internal slurry sampling bucket, 66 - internal overflow hole, 67 - external overflow hole. Detailed implementation manners

[0031] The present invention will be further described below in conjunction with embodiments. The description of the following embodiments is only for helping to understand the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0032] Embodiment 1

[0033] As an embodiment, as Figures 1 to 9 shown, this construction system for diaphragm walls in deep buried pebble layers includes an H-shaped steel combined anti-bypass device, a detachable composite cleaning scraper steel plate device, and a rapid mud parameter measurement device; the H-shaped steel combined anti-bypass device includes an H-shaped steel 2, a right-angle steel plate 6, and a rubber bladder bag 9.

[0034] As Figure 1 and Figure 2As shown, on the outer sides of the flanges of the H-beam 2, right-angled steel plates 6 are symmetrically welded, and several rubber bladder bags 9 are connected to the inner sides of the right-angled steel plates 6; the detachable composite cleaning scraper steel plate device includes a scraper main body 22; the top of the scraper main body 22 is connected to the grab bucket body through a connection hole 31; scrapers and cleaning brushes 25 are provided on the peripheral side walls of the scraper main body 22; the rapid mud parameter measuring device includes a mud sampler barrel body 47, and an internal slurry sampling small barrel 65 is provided in the mud sampler barrel body 47, and the internal slurry sampling small barrel 65 and the mud sampler barrel body 47 are on the same axis.

[0035] As Figure 3 and Figure 4 As shown, a horizontal steel bar 1 is welded to the left side of the joint of the H-beam 2, a circular joint pipe 8 is installed on the right side, and the gap is filled with filled sandbags 7; right-angled steel plates 6 are symmetrically welded to the front and rear sides of the H-beam 2, and several rib plates 5 are arranged on the outer sides of the right-angled steel plates 6 and connected to the inclination plates 4, and end plates 3 are installed at their ends. The inclination angles of the inclination plates 4 increase sequentially according to the arrangement order. A plurality of positioning members 10 are fixed to the inner sides of the right-angled steel plates 6; the fillable rubber bladder bags 9 are arranged along the entire length of the right-angled steel plates 6. Fixing members 13 are provided on the surface of the bladder bags and connected to spring members 11. Lock heads 12 are provided at the ends of the spring members 11 and fixedly connected to the positioning members 10 on the right-angled steel plates 6; adjacent rubber bladder bags 9 are connected by a flexible connecting plate 14. Hooks 16 are provided on the rubber bladder bags 9, and the telescopic connecting rope 15 is fixedly connected to the hooks 16 of the rubber bladder bags 9; a grouting pipe is pre-placed in the fillable rubber bladder bag 9, and cement slurry is injected into the bladder bag before the concrete pouring of the diaphragm wall, so that it continuously expands and compresses the spring members 11, the flexible connecting plate 14 and the telescopic connecting rope 15 until it is tightly attached to the side wall of the groove section; the flexible connecting plate 14 is composed of an upper top plate 19 and a lower bottom plate 20, and several elastic small columns 17 are evenly arranged in the middle, and a plastic filler 18 is filled between adjacent elastic small columns 17; in the case of the collapse of the side wall of the groove section, through the inflated rubber bladder bags 9 and the multi-path and multi-angle inclination plates 4, the channels of concrete bypass can be blocked to ensure construction safety.

[0036] Embodiment 2

[0037] As another embodiment, this Embodiment 2 is proposed on the basis of Embodiment 1, and a more specific construction system for diaphragm walls in deep buried pebble layers:

[0038] As Figure 6 and Figure 7As shown in the figure, the detachable composite cleaning scraper steel plate device includes a connecting rod 35, a threaded rod 34, and an arc-shaped chute 36; a connecting hole 31 is provided at the top of the scraper body 22 for connection with the grab bucket body, a toothed plate 21 is installed at the bottom, and a circumferential scraper 24 and a scraper 27 are arranged on the face; a fixed frame 33 is arranged between the scraper 24 and the scraper 27 to install a cleaning brush 25. The middle part of the cleaning brush 25 passes through the threaded rod 34, and the end is placed in the arc-shaped chute 36, and can move up and down in the threaded rod 34 and the chute to drive the cleaning brush 25 to move; a dust suction head 26 is provided at the end of the cleaning brush 25 and is connected to a dust suction cross pipe 37 and a dust suction vertical pipe 38 placed inside the connecting rod 35, and sundries are centrally collected into a sundries collection box 29 through a pump 39; a slider 32 is arranged inside the fixed frame 33 and is placed in a limit groove 30 provided on the sundries collection box 29, and the relative position of the sundries collection box 29 is moved up and down by a jack 28 provided at the bottom of the fixed frame 33.

[0039] As Figure 8 and Figure 9 As shown in the figure, a spiral stirring paddle 42 is provided at the bottom of the mud sampler barrel body 47 through a limit post 41. A limit plate 40 is provided at the end of the limit post 41 to ensure that the spiral stirring paddle 42 will not slip away from the limit post when rotating up and down; arc-shaped shafts 46 are provided on both sides of the sampler barrel body 47 through clamps 58. The arc-shaped shafts 46 are connected to both sides of the mud sampler barrel body through clamps 58 on the outer periphery of the bottom of the mud sampler barrel body 47; pulleys 43 are installed at the bottom of the arc-shaped shafts 46, and counterweights are arranged in the middle according to the construction conditions. The counterweights are composed of two identical arc-shaped counterweights 44 fixed by fixing rib plates 45 and bolts, and support columns 57 are arranged between adjacent counterweights to strengthen the connection; lifting lugs 55 are provided on both sides of the sampler barrel body 47 through clamps 58, and lifting ropes 54 are installed inside the lugs to control the barrel body to enter the diaphragm wall groove; a barrel cover 52 is fitted on the top of the mud sampler barrel body 47. A fixed rod 51 is provided on the top of the barrel cover 52 and is connected to a telescopic rod 64 connected to an internal slurry sampling bucket 65. The top end of the telescopic rod 64 is inserted into a tension rod 50, and the bottom end is connected to the internal slurry sampling bucket 65; the tension rod 50 is connected to the telescopic rod 64 through an elastic connection head 63.

[0040] A sliding rope 56 is fixed to the barrel cover 52 and the bottom of the mud sampler barrel body 47, and passes through a limit sleeve 53 and U-shaped limit members 59 provided on both sides of the internal slurry sampling bucket 65; a limit sleeve 53 is provided at the bottom inside the mud sampler barrel body 47, and the sliding rope 56 passes through the U-shaped limit members 59 and the limit sleeve 53; partition plates 60 are symmetrically arranged inside the mud sampler barrel body 47 and sliding columns 61 are installed, and a stirring device 62 circulates up and down along the sliding columns 61 for stirring.

[0041] During construction, the mud sampler barrel 47 is lowered by the hoisting rope 54, and the mud in the barrel is collected through the external overflow hole 67. When taking mud inside the mud sampler barrel, keep the internal stirring device 62 running. Press down the stretching rod 50 to make the elastic connector 63 contract and the telescopic rod 64 extend, prompting the internal mud sampling bucket 65 to move downward along the sliding rope 56. The mud passes through the internal overflow hole 66 and enters the internal mud sampling bucket 65 to complete mud sampling. After the mud sampling is completed, extend the stretching rod 50 upward to make the elastic connector 63 expand and the telescopic rod 64 contract, prompting the internal mud sampling bucket 65 to move upward along the sliding rope 56. Take out the internal mud sampling bucket 65 and directly place it in the detection slot 49 of the intelligent detection device 48 for rapid detection.

[0042] It should be noted that the parts that are the same or similar to those in Embodiment 1 in this embodiment can be referred to each other and will not be elaborated in this application.

[0043] Embodiment 3

[0044] As another embodiment, this Embodiment 3 is proposed on the basis of Embodiments 1 and 2. The construction method of the deep buried pebble layer diaphragm wall using this deep buried pebble layer diaphragm wall construction system includes the following steps:

[0045] Step 1: Grooving construction: When performing grooving construction, use a grooving machine + milling machine method for grooving construction. Use a grooving machine in the soil layer and a milling machine in the rock layer to ensure the grooving quality.

[0046] Joint treatment: The joint uses I-beams. I-beam joints are provided on both sides of the first opening section, on one side of the single-sided section, and no I-beam joint is provided for the closed section. The I-beams are installed on the steel reinforcement cage and lowered into the groove together with the steel reinforcement cage. Horizontal steel bars 1 are welded on the left side of the H-shaped steel 2 joint, and a circular joint pipe 8 is installed on the right side, and the gap is filled with a filled sandbag 7; Right-angled steel plates 6 are symmetrically welded on the front and rear sides of the H-shaped steel 2. A number of rib plates 5 are arranged outside the right-angled steel plate 6 and connected to the inclined angle plate 4, and end plates 3 are installed at their ends. The inclination angles of the inclined angle plates 4 increase in sequence according to the arrangement order; The fillable rubber bladder bag 9 is arranged along the entire length of the right-angled steel plate 6. Fixing parts 13 are arranged on the surface of the bladder bag and connected to spring parts 11. The end of the spring part 11 is provided with a lock head 12 which is fixedly connected to the positioning part 10 on the right-angled steel plate 6; Adjacent rubber bladder bags 9 are connected by a flexible connecting plate 14. Telescopic connecting ropes 15 are provided on both sides of the plate and fixedly connected to the hooks 16 of the rubber bladder bag 9; A grouting pipe is pre-placed in the fillable rubber bladder bag 9. Before pouring the concrete of the diaphragm wall, cement slurry is injected into the bladder bag to continuously expand and compress the spring part 11, the flexible connecting plate 14 and the telescopic connecting rope 15 until it is tightly attached to the side wall of the groove section; The flexible connecting plate 14 is composed of an upper top plate 19 and a lower bottom plate 20, and a number of elastic small columns 17 are evenly arranged in the middle. Plastic filler 18 is filled between adjacent elastic small columns 17; In the case of the collapse of the side wall of the groove section, through the inflated rubber bladder bag 9 and the multi-path and multi-angle inclined angle plate 4, the channels for the concrete to flow around can be blocked to ensure the construction safety.

[0047] Step 2. Cleaning of the I-beam joint: After the joint concrete is poured, the grab bucket body is closely attached to the I-beam joint to remove the backfilled sandbags; At the same time, a detachable composite cleaning scraper steel plate device is installed on the grab bucket body to clean the concrete and other sundries adhering to the I-beam joint; A connecting hole 31 is provided at the top of the scraper body 22 and connected to the grab bucket body. A tooth plate 21 is installed at the bottom, and a circumferential scraper 24 and a scraper 27 are arranged on the surface; A fixing frame 33 is arranged between the scraper 24 and the scraper 27 to install a cleaning brush 25. The middle of the cleaning brush 25 passes through a threaded rod 34, and the end is placed in an arc-shaped chute 36 and can move up and down in the threaded rod 34 and the chute to drive the cleaning brush 25 to move; A dust suction head 26 is provided at the end of the cleaning brush 25 and connected to a dust suction cross pipe 37 and a dust suction vertical pipe 38 placed inside the connecting rod 35. The sundries are centrally collected into the sundries collection box 29 through a pump 39; A slider 32 is arranged in the fixing frame 33 and placed in a limit groove 30 provided on the sundries collection box 29. The relative position of the sundries collection box 29 is moved up and down through a jack 28 provided at the bottom of the fixing frame 33.

[0048] Step 3. Hoist the mud parameter rapid measurement device into the groove; After the mud flows into the internal slurry sampling bucket 65, mud sampling and detection are completed; Then pour the concrete of the diaphragm wall.

[0049] It should be noted that the parts that are the same or similar to those in the first and second embodiments in this embodiment can be referred to each other and will not be elaborated in this application.

[0050] Embodiment 4

[0051] As another embodiment, this Embodiment 4 is proposed on the basis of Embodiments 1 to 3. A more specific construction method for a diaphragm wall in a deep buried pebble layer specifically includes the following steps in Step 3:

[0052] Bottom cleaning and slurry replacement: A method combining the precipitation method and the replacement method is adopted. For bottom cleaning using the precipitation method, it should start 0.5 h after the end of trench excavation. The hydraulic grab used for trench excavation operations is directly used to remove the sediment at the bottom of the trench. For the replacement method, a pump suction reverse circulation slurry replacement is adopted. The slurry replacement pump is hoisted by a crane to a position 1 m above the bottom of the trench, and the slurry replacement pump is started to suck the sediment at the bottom of the trench upward while replenishing slurry at the trench opening. After the bottom cleaning and slurry replacement are completed, a rapid measurement device for slurry parameters is used to detect the three slurry indicators. At the bottom of the barrel body 47 of the slurry sampler, a spiral stirring paddle 42 is provided through a limit post 41. A limit plate 40 is provided at the end of the limit post 41 to ensure that the spiral stirring paddle 42 will not slip away from the limit post when rotating and moving up and down. Arc-shaped shafts 46 are provided on both sides of the sampler barrel body 47 through hoop clamps 58. A pulley 43 is installed at the bottom of the shaft 46, and counterweights are arranged in the middle according to the construction conditions. The counterweights are composed of two identical arc-shaped counterweights 44 fixed by fixing rib plates 45 and bolts, and support columns 57 are arranged between adjacent counterweights to strengthen the connection; Hoisting ear plates 55 are provided on both sides of the sampler barrel body 47 through hoop clamps 58, and hoisting ropes 54 are installed inside the ear plates to control the barrel body to enter the diaphragm wall trench; A fixing rod 51 is provided at the top of the barrel cover 52 and is connected to a telescopic rod 64 connected to an internal slurry sampling bucket 65; The stretching rod 50 is connected to the telescopic rod 64 through an elastic connection head 63; A sliding rope 56 is fixed to the barrel cover 52 and the bottom of the slurry sampler barrel body 47 and passes through a limit sleeve 53 and U-shaped limit members 59 provided on both sides of the internal slurry sampling bucket 65; Diaphragms 60 are symmetrically arranged inside the slurry sampler barrel body 47 and sliding columns 61 are installed, and a stirring device 62 circulates up and down along the sliding columns 61 for stirring; During construction, the slurry sampler barrel body 47 is lowered through the hoisting rope 54, and the slurry in the barrel is collected through an external overflow hole 67; When taking slurry inside the slurry sampler barrel body, keep the internal stirring device 62 running. By pressing down the stretching rod 50, the elastic connection head 63 contracts and the telescopic rod 64 extends, prompting the internal slurry sampling bucket 65 to move downward along the sliding rope 56. The slurry enters the internal slurry sampling bucket 65 through the internal overflow hole 66 to complete slurry sampling; After the slurry sampling is completed, by stretching the stretching rod 50 upward, the elastic connection head 63 expands and the telescopic rod 64 contracts, prompting the internal slurry sampling bucket 65 to move upward along the sliding rope 56, and the internal slurry sampling bucket 65 is taken out and directly placed in the detection slot 49 of the intelligent detection device 48 for rapid detection.

[0053] Lifting of steel reinforcement cage: Two lifting equipment are selected to lift the steel reinforcement cage. Each lifting equipment uses steel wire ropes to connect the lifting beam through two lifting points, and then the lifting beam uses steel wire ropes to connect through four lifting points set on the steel reinforcement cage. The steel reinforcement cage is lifted as a whole.

[0054] Concrete construction: To ensure the pouring quality of the wall, double conduits are used for pouring. The height difference between the bottom of the conduit and the trough bottom during the first concrete pouring is not more than 50 cm. During the initial pouring, the concrete truck directly pours into the conduit at the trough opening.

[0055] It should be noted that the same or similar parts in this embodiment and Embodiments 1 to 3 can be referred to each other and will not be elaborated in this application.

[0056] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

Claims

1. A deep-buried pebble layer underground continuous wall construction system, characterized in that: It includes an H-shaped steel combined anti-circumvention device, a detachable composite cleaning scraper steel plate device and a mud parameter rapid measuring device; the H-shaped steel combined anti-circumvention device includes an H-shaped steel, a right-angle steel plate and a rubber bag; the outer side of the H-shaped steel flange plate is symmetrically welded with right-angle steel plates, and the inner side of the right-angle steel plate is connected with several rubber bags; the detachable composite cleaning scraper steel plate device includes a scraper body; the top of the scraper body is connected to the grab bucket body through a connecting hole; scrapers and cleaning brushes are provided on the side walls around the scraper body; the mud parameter rapid measuring device includes a mud sampler barrel body, and an internal slurry bucket is provided in the mud sampler barrel body, and the internal slurry bucket and the mud sampler barrel body are on the same axis.

2. The deep-buried pebble layer underground continuous wall construction system according to claim 1 is characterized in that: A horizontal steel bar is welded on one side of the inner side of the H-shaped steel flange plate, and a circular joint pipe is installed on the other side. The gap between the circular joint pipe and the H-shaped steel is filled with sandbags; a number of ribs are arranged on the outer side of the right-angle steel plate, and the ends of the ribs are connected with angled plates, and the ends of the right-angle steel plates are connected with end plates; a plurality of positioning parts are fixed on the inner side of the right-angle steel plate, and a rubber bag is arranged along the entire length of the right-angle steel plate. A fixing part is provided on the surface of the rubber bag, and a spring part is connected to the fixing part. A locking head is provided on the other end of the spring part. A positioning part is provided on the inner side of the right-angle steel plate, and the locking head is fixedly connected to the positioning part on the right-angle steel plate.

3. The deep-buried pebble layer underground continuous wall construction system according to claim 1 is characterized in that: A number of rubber bags are arranged in the right-angle steel plate, and adjacent rubber bags are connected by a flexible connecting plate. Telescopic connecting ropes are arranged on both sides of the flexible connecting plate. Hooks are arranged on the rubber bags, and the telescopic connecting ropes are fixed to the hooks of the rubber bags. A grouting pipe is placed in the rubber bag. The flexible connecting plate includes an upper top plate and a lower bottom plate. A number of elastic small columns are evenly arranged between the upper top plate and the lower bottom plate, and plastic filling materials are filled between adjacent elastic small columns.

4. The deep-buried pebble layer underground continuous wall construction system according to claim 1 is characterized in that: The detachable composite cleaning scraper steel plate device includes a connecting rod, a threaded rod and an arc-shaped slide groove; a connecting hole is provided on the top of the scraper body and is connected to the grab bucket body, a tooth plate is installed at the bottom of the scraper body, and scraper one and scraper two are arranged on the side of the scraper body, and scraper one and scraper two are all-around scrapers; a fixed frame is provided between scraper one and scraper two, and a cleaning brush is installed around the fixed frame, the middle of the cleaning brush passes through the threaded rod, and the end is slidably connected in the arc-shaped slide groove, and the cleaning brush is connected to the threaded rod and the arc-shaped slide groove through the connecting rod; a dust suction head is provided at the end of the cleaning brush, a dust suction horizontal pipe is provided inside the connecting rod, and a dust suction vertical pipe is connected to the end of the dust suction horizontal pipe, and the dust suction head and the dust suction horizontal pipe are connected.

5. The deep-buried pebble layer underground continuous wall construction system according to claim 1 is characterized in that: A spiral stirring paddle is provided at the bottom of the mud sampler barrel through a limit column, and a limit plate is provided at the end of the limit column, and the spiral stirring paddle rotates up and down along the limit column; clamps are provided at the bottom and the middle periphery of the mud sampler barrel, and the arc shaft is connected to both sides of the mud sampler barrel through the clamps at the periphery of the bottom of the mud sampler barrel; a pulley is installed at the bottom of the arc shaft, and a plurality of counterweights are sleeved in the middle of the arc shaft, each counterweight includes two arc counterweights, which are fixed by fixed ribs, and support columns are reinforced between adjacent counterweights; hoisting ear plates are symmetrically provided on the clamps at the periphery of the middle part of the mud sampler barrel, and hoisting ropes are installed in the hoisting ear plates.

6. The deep-buried pebble layer underground continuous wall construction system according to claim 1, characterized in that: The top of the mud sampler barrel is equipped with a barrel cover, and a fixed rod is provided on the top of the barrel cover. A stretching rod is inserted on the top of the fixed rod. The lower end of the stretching rod is connected with an elastic connector, and the stretching rod is connected to a telescopic rod through the elastic connector. The top of the telescopic rod is inserted in the stretching rod, and the bottom is connected to the internal slurry bucket; a sliding rope is fixed between the barrel cover and the mud sampler barrel, U-shaped limiters are provided on both sides of the internal slurry bucket, and a limit sleeve is provided at the bottom of the mud sampler barrel, and the sliding rope passes through the U-shaped limiter and the limit sleeve; partitions are symmetrically provided on the inner wall of the mud sampler barrel, sliding columns are installed between the partitions, and a stirring device is provided on the sliding column.

7. A method for constructing a deep-buried pebble layer underground continuous wall using the deep-buried pebble layer underground continuous wall construction system according to claim 1, characterized in that: The following steps are involved: Step 1: After the ground-connected wall is constructed into a trench, the H-shaped steel is installed on the steel cage and placed in the trench; the rubber bag is installed inside the right-angle steel plate, and cement slurry is injected into the rubber bag to make the H-shaped steel combined anti-circumvention device fit the side wall of the trench section; Step 2: After pouring the H-shaped steel joint concrete, install the detachable composite cleaning scraper steel plate device on the grab bucket body through the connection hole on the top of the scraper body, and then use the scraper to clean up the debris adhering to the H-shaped steel joint; Step 3: hoist the mud parameter rapid measuring device into the tank; complete mud sampling and testing after the mud flows into the internal slurry bucket; then pour the underground continuous wall concrete.

8. The construction method of the deep-buried pebble layer underground continuous wall according to claim 7 is characterized in that: The mud parameter rapid measuring device comprises a mud sampler barrel body, an internal slurry sampling barrel is arranged inside the mud sampler barrel body; the internal slurry sampling barrel is connected to a stretching rod; hoisting ear plates are symmetrically arranged on the outer clamp of the middle part of the mud sampler barrel body, and hoisting ropes are installed in the hoisting ear plates; partitions are symmetrically arranged on the inner wall of the mud sampler barrel body and sliding columns are installed, and internal stirring devices are evenly distributed on the sliding columns; an external overflow hole is arranged on the top of the mud sampler barrel body, and an internal overflow hole is arranged on the top of the internal slurry sampling barrel; a sliding rope is fixed between the barrel cover and the mud sampler barrel body; an intelligent detection device is arranged on the top of the barrel cover, and a detection groove is opened on the intelligent detection device.

9. The construction method of the deep-buried pebble layer underground continuous wall according to claim 8, characterized in that: In step three, the stirring device performs a circular stirring motion up and down along the sliding column; the mud sampler barrel is lowered by the lifting rope, and the mud is collected by the external overflow hole; the internal stirring device is kept running, and the internal slurry bucket is moved downward along the sliding rope by pressing the stretching rod downward, and the mud enters the internal slurry bucket through the internal overflow hole, and the internal slurry bucket is moved upward along the sliding rope by extending the stretching rod upward, and the internal slurry bucket is taken out and placed in the detection tank of the intelligent detection device for detection.

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