Trenching construction technology of underground continuous wall adjacent to deep and soft soil layer of river and sea

Abstract

The application relates to the trenching technology of underground continuous walls, and particularly discloses a trenching construction process for underground continuous walls in close proximity to river-sea water-rich deep soft soil layers, which comprises six steps of construction preparation, hole leading, grab trenching, trench milling and trenching acceptance. In the step of grab trenching, a trenching machine is used for trenching, a soil receiving device is arranged to transfer the soil grabbed by the trenching machine, and a cleaning device is arranged to clean the grab of the trenching machine. The application has the effect of improving the soil grabbing efficiency of the trenching machine.

Description

TECHNICAL FIELD

[0001] The present application relates to the trenching technology of underground continuous wall, especially to a trenching construction process of underground continuous wall adjacent to river and sea water-rich deep soft soil layer. BACKGROUND

[0002] The underground continuous wall is a kind of foundation engineering on the ground, which uses a kind of trenching machine to excavate a narrow and deep trench along the axis of the deep excavation project under the condition of mud protection, and then places a reinforcement cage in the trench after cleaning the trench, pours and builds underwater concrete by the guide pipe method to form a unit trench segment, and thus the process is carried out segment by segment to build a continuous reinforced concrete wall underground. For the foundation engineering adjacent to river and sea water-rich deep soft soil layer, the underground continuous wall plays a crucial role in water cutting, seepage prevention, load bearing and water retaining.

[0003] In the process of trenching of the underground continuous wall, a total station is usually used to measure and lay out the site, a rotary drilling rig is used to drill a hole at the underground continuous wall prefabrication position, a hydraulic grab trencher is used for trenching construction, a mud circulating system is used to supply mud to the trench during the process, the mud is used to protect and clean the trench wall, the trenching is carried out segment by segment, a reinforcement cage is placed, and concrete is poured to form the underground continuous wall.

[0004] For the related technology in the above, because the soil adjacent to river and sea water-rich deep soft soil layer is soft and has high water content, a large amount of soil blocks will adhere to the grab of the trencher during the process of grabbing soil, and the adhered soil blocks on the grab will affect the amount of single grabbing. When the grab releases the soil, the trencher needs to change the direction so that the grab can release the soil into the transport vehicle, which causes the next time of grabbing soil to need time to re-align the trench mouth. Therefore, the adhered soil blocks on the grab and the frequent turning of the trencher will affect the soil grabbing efficiency. SUMMARY

[0005] In order to improve the problem that the adhered soil blocks on the grab and the frequent turning of the trencher affect the soil grabbing efficiency, the present application provides a trenching construction process of underground continuous wall adjacent to river and sea water-rich deep soft soil layer.

[0006] The trenching construction process of underground continuous wall adjacent to river and sea water-rich deep soft soil layer provided by the present application adopts the following technical solution:

[0007] A trenching construction process of underground continuous wall adjacent to river and sea water-rich deep soft soil layer, comprising the following steps:

[0008] S1, construction preparation: removing underground obstacles, leveling the site, installing equipment; testing the slurry material in the factory, carrying out proportioning test on the slurry material, making the mud needed for excavating the wall trench and storing it;

[0009] S2, hole drilling: using a rotary drilling rig to drill a hole at the wall prefabrication position;

[0010] S3, grab trenching: using trenching machine for trenching construction, first the two ends of the wall slot are grabbed, then the middle part of the wall slot is grabbed, the mud in the slot is circulated and supplied through the mud circulating system; one side of the trenching machine is provided with a soil receiving device and a cleaning device, the soil receiving device is used to transfer the soil in the grab bucket of the trenching machine to the transport vehicle, and the cleaning device is used to clean the grab bucket of the trenching machine;

[0011] S4, milling: using a milling machine to mill a slot, and circulating and supplying mud in the slot through a mud circulating system;

[0012] S5, trenching acceptance: detecting the verticality of the slot wall, the thickness of the slot bottom sediment and the quality of the wall body;

[0013] S6, cleaning and acceptance: cleaning the debris, silt and other contaminants in the slot, and repairing and maintaining the defects in the slot.

[0014] By adopting the above technical scheme, the quality of the continuous wall trenching is ensured to meet the requirements through the six steps of construction preparation, hole drilling, grab trenching, milling, trenching acceptance and cleaning acceptance, so that the poured continuous wall can achieve the purposes of water interception, seepage prevention, load bearing and water retaining; the method of "three grabs" trenching can reduce the possibility of slot wall collapse and increase work efficiency; the soil in the grab bucket of the trenching machine is transferred by the soil receiving device, which reduces the need for the trenching machine to turn after each soil grabbing, thereby improving the soil grabbing efficiency of the trenching machine; the soil in the grab bucket of the trenching machine is cleaned by the cleaning device, which makes the soil attached to the grab bucket fall off the grab bucket, facilitating the soil grabbing of the grab bucket, and further improving the soil grabbing efficiency of the trenching machine.

[0015] Optionally, the wall slot away from the trenching machine is provided with a moving platform, the soil receiving device and the cleaning device are arranged on the moving platform, the soil receiving device is movably connected with the moving platform between the soil receiving state and the soil releasing state, and the cleaning device is movably connected with the moving platform between the cleaning state and the storage state.

[0016] By adopting the above technical scheme, when the grab bucket of the trenching machine rises for soil releasing, the soil receiving device moves to the soil receiving state, the grab bucket opens, and the grabbed soil falls into the soil receiving device, and the cleaning device moves to the cleaning state to clean the open grab bucket; when the grab bucket of the trenching machine is lowered for soil grabbing, the soil receiving device is in the soil releasing state, and the cleaning device is in the storage state, thereby giving way to the grab bucket, facilitating the soil grabbing of the trenching machine.

[0017] Optionally, the moving platform is provided with a rotating table, the rotating table is rotatably connected with the moving platform, and the soil receiving device and the cleaning device are arranged on the rotating table.

[0018] By rotating the rotating table, the soil receiving device and the cleaning device are rotated to below the grab bucket, so that the soil is received and the grab bucket is cleaned, or the soil receiving device and the cleaning device are moved away from below the grab bucket, so that the grab bucket is positioned.

[0019] Optionally, the soil receiving device comprises a soil receiving hopper and a discharging switch, the soil receiving hopper is fixedly connected with the rotating table, and the discharging switch is arranged at the bottom of the soil receiving hopper.

[0020] By adopting the above technical scheme, when the soil receiving device is in the soil receiving state, the discharging switch is in the closed state, so that the soil receiving hopper receives the soil in the grab bucket; when the soil receiving device is in the soil discharging state, the discharging switch is in the open state, so that the soil in the soil receiving hopper falls into the transport vehicle, thereby facilitating the transfer of the soil grabbed from the wall groove.

[0021] Optionally, the discharging switch comprises a discharging plate and a discharging drive, the discharging plate is slidably connected with the soil receiving hopper in the transverse direction, and the discharging drive is used to drive the discharging plate to slide.

[0022] By adopting the above technical scheme, when the discharging switch controls the soil receiving hopper, the discharging drive drives the discharging plate to slide transversely, so that the discharging plate shields or opens the bottom of the soil receiving hopper, thereby controlling the soil in the soil receiving hopper to be located in the soil receiving hopper or to be separated from the soil receiving hopper from the bottom of the soil receiving hopper.

[0023] Optionally, the cleaning device comprises a cleaning box, a cleaning drive and a cleaning assembly, the cleaning box is movably connected with the rotating table, the cleaning drive is used to drive the cleaning box to move between a cleaning state and a storage state, and the cleaning assembly is arranged on the cleaning box.

[0024] By adopting the above technical scheme, when the cleaning box cleans the grab bucket, the cleaning drive drives the cleaning box to enter the cleaning state, and the cleaning assembly in the cleaning box cleans the grab bucket; when the cleaning box positions the grab bucket, the cleaning drive drives the cleaning box to enter the storage state, so that the cleaning box moves away from the grab bucket, thereby facilitating the trench forming machine to perform the trench forming construction.

[0025] Optionally, the cleaning drive comprises a mounting plate, a lifting drive and a sliding drive, the mounting plate is slidably connected with the rotating table, the lifting drive is connected with the rotating table and is used to lift or lower the mounting plate, the cleaning box is slidably connected with the mounting plate and slides in the direction of approaching or moving away from the trench forming machine, the sliding drive is used to drive the cleaning box to slide on the mounting plate, and the top of the cleaning box is provided with an opening.

[0026] By adopting the technical scheme, when the cleaning drive drives the cleaning box into the cleaning state, the sliding drive drives the cleaning box to be close to the grab bucket to make the cleaning box be below the grab bucket, the lifting drive drives the cleaning box to be lifted to make the grab bucket be inside the cleaning box, thereby facilitating the cleaning of the cleaning box; when the cleaning drive drives the cleaning box into the storage state, the lifting drive drives the cleaning box to be lowered to make the grab bucket be separated from the cleaning box, and the sliding drive drives the cleaning box to be moved away from the grooving machine to make the cleaning box enter the storage state, thereby facilitating the steps and enabling the cleaning box to clean the grab bucket quickly after the grab bucket is lifted.

[0027] Optionally, the cleaning assembly comprises a water collecting tank and a plurality of spray heads, the water collecting tank is connected with the side wall of the cleaning box, and the spray heads are arranged on the inner wall of the water collecting tank and used for washing the grab bucket of the grooving machine.

[0028] By adopting the technical scheme, when the cleaning assembly washes the grab bucket, the water in the water collecting tank is dispersed into the plurality of spray heads, the plurality of spray heads wash different positions of the grab bucket from different angles respectively, and thus the cleaning efficiency of the grab bucket is improved.

[0029] Optionally, a water inlet joint is arranged on the water collecting tank, and the mud circulating system supplies water to the water collecting tank through the water inlet joint.

[0030] By adopting the technical scheme, the water collecting tank is supplied with water by the mud circulating system, the water source of the cleaning device can be supplied continuously, and thus the cleaning function of the cleaning device can be maintained.

[0031] Optionally, a water outlet joint is arranged at the bottom of the cleaning box, and the cleaning box discharges the cleaning sewage to the mud circulating system through the water outlet joint.

[0032] By adopting the technical scheme, the sewage in the cleaning box is discharged to the mud circulating system for treatment, the cleaning degree of the cleaning box is ensured, the cleaning efficiency of the cleaning box on the grab bucket is further improved, and the cleaning box can be in a low water level state, thereby reducing the possibility that the spray heads are submerged by the water in the cleaning box.

[0033] In summary, the present application has at least one of the following beneficial technical effects:

[0034] 1. By arranging the soil receiving device and the cleaning device, the soil receiving device transfers the soil in the grab bucket of the grooving machine to the transport vehicle after the grooving machine takes the soil from the groove and is lifted, the step of turning the grooving machine to discharge the soil is reduced, and thus the time spent by the grooving machine in turning and re-aligning the slotting position is reduced, and the soil grabbing efficiency is improved; the cleaning device cleans the soil blocks adhered to the grab bucket, facilitates the soil grabbing of the grab bucket, and further improves the soil grabbing efficiency of the grooving machine.

[0035] 2. By setting the moving table and the rotating table, when the slotting position changes, the moving table can carry the cleaning device and the soil receiving device to move, so as to facilitate the adjustment of the positions of the cleaning device and the soil receiving device to adapt to the position of the slotting machine; the rotating table can control the cleaning device and the soil receiving device to turn at the same time, so as to facilitate the angle adjustment of the cleaning device and the soil receiving device at the same time.

[0036] 3. By connecting the cleaning box and the water collecting box with the mud circulating system, when the grab bucket is cleaned, the water collecting box can receive the clean water provided by the hydraulic system, and the sewage after cleaning can be returned to the mud circulating system for treatment, so that the water resources can be fully utilized, and the waste of water resources can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0038] Figure 1 is a continuous wall slotting construction process flowchart of the embodiment of the present application;

[0039] Figure 2 is a whole structure schematic diagram of the grab bucket slotting step of the embodiment of the present application;

[0040] Figure 3 is an enlarged schematic diagram of part A in Figure 2

[0041] Figure 4 is a soil receiving state schematic diagram of the embodiment of the present application;

[0042] Figure 5 is a structure schematic diagram of the soil receiving device and the cleaning device of the embodiment of the present application;

[0043] Figure 6 is a soil receiving switch state schematic diagram of the embodiment of the present application;

[0044] Figure 7 is a structure schematic diagram of the cleaning assembly of the embodiment of the present application;

[0045] Figure 8 is a schematic diagram of the grab bucket slotting step of the embodiment of the present application.

[0046] ​Mark: 1, grooving machine; 11, grab; 2, wall groove; 3, mud circulating system; 31, sedimentation tank; 32, slurry storage tank; 33, clean water tank; 34, slurry preparation tank; 35, slurry return pipe; 36, slurry injection pipe; 37, water inlet pipe; 38, drain pipe; 4, soil receiving device; 41, soil receiving hopper; 42, discharging switch; 421, discharging plate; 422, discharging drive; 5, cleaning device; 51, cleaning tank; 511, drain connector; 512, water inlet connector; 513, communication pipe; 52, cleaning drive; 521, mounting plate; 522, lifting drive; 523, sliding drive; 524, first guide rod; 525, second guide rod; 526, vertical plate; 53, cleaning assembly; 531, water collecting tank; 532, spray head; 6, moving platform; 61, rotating table; 62, mounting table. DETAILED DESCRIPTION

[0047] The following will be described in detail with reference to the accompanying drawings. Figures 1-7 The application is further described in detail.

[0048] The embodiment of the application discloses a grooving construction process of a close-to-river-and-sea water-rich deep soft soil layer underground continuous wall. Figure 1 The grooving construction process of the close-to-river-and-sea water-rich deep soft soil layer underground continuous wall comprises the following steps:

[0049] S1, construction preparation: removing underground obstacles, leveling the site, installing equipment; the slurry material is inspected in the factory, the slurry material is proportioned and tested, the slurry required for excavating the wall groove 2 is prepared and stored.

[0050] S2, hole drilling: the construction site is measured and laid out by a total station, the specific construction position of the continuous wall is determined, and a rotary drilling rig is used to drill holes at the wall body prefabrication position.

[0051] S3, grab grooving: the grooving machine 1 is used for grooving construction, the two ends of the wall groove 2 are grabbed first, and then the middle part of the wall groove 2 is grabbed, the mud circulating system 3 is used for circulating and supplying mud in the groove, and the mud circulating system 3 is used for circulating and supplying mud in the groove; one side of the grooving machine 1 is provided with a soil receiving device 4 and a cleaning device 5, the soil receiving device 4 is used for transferring the soil in the grab 11 of the grooving machine 1 to a transport vehicle, and the cleaning device 5 is used for cleaning the grab 11 of the grooving machine 1.

[0052] S4, slot milling: a slot milling machine is used for slot milling, and the mud circulating system 3 is used for circulating and supplying mud in the groove.

[0053] S5, grooving acceptance: the groove wall perpendicularity, groove bottom sediment thickness and wall body quality are detected.

[0054] S6, groove cleaning acceptance: the groove is cleaned of sundries, silt and other dirt, and the defects in the groove are repaired and maintained.

[0055] Referring to Figure 1 , the continuous wall in the embodiments of the present application is divided into four types of "I" type, "L" type, "Z" type and "T" type, Figure 1 only the "Z" type continuous wall is shown, through a plurality of wall grooves 2 of different shapes, and by lowering a prefabricated reinforcement cage into the wall groove 2, pouring is carried out using C35.P8 underwater concrete, so as to form an underground continuous wall in the complex stratum of the adjacent river and sea deep and thick soft soil layer.

[0056] Referring to Figure 2 and Figure 3 , when the wall groove 2 is opened, a trenching machine 1 is needed to open the trench, the trenching machine 1 is a hydraulic grab trenching machine, the trenching machine 1 is located at one side of the long side of the wall groove 2 during construction, and the long side of the wall groove 2 away from the trenching machine 1 is provided with a soil receiving device 4 and a cleaning device 5. When the trenching machine 1 is in construction, the grab bucket 11 is lowered to the bottom of the wall groove 2, the hydraulic drive drives the grab bucket 11 to grab the soil and trench, after completing a soil grabbing, the grab bucket 11 is raised to a predetermined position and opened, the soil receiving device 4 receives the soil in the grab bucket 11, so that the trenching machine 1 reduces the step of reversing and discharging the soil, and improves the soil grabbing efficiency of the trenching machine 1; the cleaning device 5 cleans the grab bucket 11, so that the soil blocks adhered to the grab bucket 11 are separated, and the negative influence of the soil blocks adhered to the grab bucket 11 on the next soil grabbing is reduced, so as to further improve the soil grabbing efficiency of the trenching machine 1.

[0057] Referring to Figure 2 , the trenching machine 1 needs to continuously inject new mud into the wall groove 2 during construction, and part of the mud is pumped out of the wall groove 2. A mud circulating system 3 is provided at the construction site, which includes a sedimentation tank 31, a slurry storage tank 32, a clean water tank 33 and a slurry preparation tank 34, and further includes a slurry return pipe 35 and a slurry injection pipe 36. One end of the slurry return pipe 35 is located in the wall groove 2, and the other end is located in the sedimentation tank 31. A mud pump is connected to the slurry return pipe 35, which is not shown in the figure. The slurry return pipe 35 pumps the mud and soil mixture in the wall groove 2 to the sedimentation tank 31 through the mud pump for sedimentation, so as to facilitate repeated use. One end of the slurry injection pipe 36 is located in the wall groove 2, and the other end is located in the slurry storage tank 32. A mud pump is connected to the slurry injection pipe 36, which is not shown in the figure. The slurry injection pipe 36 pumps the mud in the slurry storage tank 32 into the wall groove 2 through the mud pump, so as to continuously circulate and transport the mud into the wall groove 2, thereby protecting the wall groove 2.

[0058] Referring to Figure 4The soil receiving device 4 and the cleaning device 5 are arranged on the moving platform 6, the moving platform 6 moves through caterpillar wheels, a rotating table 61 is arranged above the moving platform 6, the rotating table 61 is rotationally connected with the moving platform 6, a control room is arranged on the rotating table 61, the control room is used for controlling the movement of the moving platform 6 and the rotation of the rotating table 61, and the soil receiving device 4 and the cleaning device 5 are arranged on the rotating table 61. The rotation of the rotating table 61 is controlled, so that the soil receiving device 4 and the cleaning device 5 are angle-adjusted, the soil receiving device 4 is in a soil receiving preparation state or a giving way state, and the cleaning device 5 is in a cleaning preparation state or a giving way state.

[0059] With reference to Figure 4 The soil receiving device 4 comprises a soil receiving hopper 41 and a discharging switch 42, the soil receiving hopper 41 is a rectangular hopper body with a large top and a small bottom, and the top and the bottom are both arranged as openings, and the discharging switch 42 is arranged at the bottom of the soil receiving hopper 41 and is used for controlling the soil receiving hopper 41 to discharge.

[0060] With reference to Figure 4 The cleaning device 5 comprises a cleaning box 51, a cleaning drive 52 and a cleaning assembly 53, the cleaning box 51 is a rectangular box body, and the top is arranged as an opening, the cleaning drive 52 is used for driving the cleaning box 51 to move close to the grab bucket 11, so that the grab bucket 11 is located in the cleaning box 51, and the grab bucket 11 is conveniently cleaned, or the cleaning drive 52 is used for driving the cleaning box 51 to move away from the grab bucket 11, so that the cleaning box 51 gives way to the grab bucket, and the grab bucket 11 is conveniently used for the next soil grabbing. The cleaning assembly 53 is arranged on the cleaning box 51, so as to clean the grab bucket 11. One side of the moving platform 6 is provided with a transport vehicle 7, when the cleaning device 5 completes the cleaning of the grab bucket 11, the control room controls the rotating table 61 to rotate, so that the soil receiving hopper 41 is located directly above the transport vehicle 7, and the soil receiving hopper 41 is conveniently discharged.

[0061] Specifically, with reference to Figure 5 A mounting table 62 is welded on the rotating table 61, the mounting table 62 is a rectangular column body, the soil receiving hopper 41 is located on one side of the mounting table 62 and is welded with the mounting table 62 through two steel columns. The cleaning device 5 is located on the top of the mounting table 62.

[0062] With reference to Figure 5The cleaning driving 52 comprises a mounting plate 521, a lifting driving 522 and a sliding driving 523. The mounting plate 521 is a rectangular plate. A plurality of first guide rods 524 are arranged between the mounting plate 521 and the mounting table 62. The first guide rods 524 are vertically arranged. In the embodiment, the first guide rods 524 are cylindrical and four first guide rods 524 are arranged at four corners of the mounting table 62. One end of the first guide rod 524 is welded to the bottom of the mounting plate 521, and the other end is inserted into the mounting table 62 and is connected to the mounting table 62 in the axial direction. The lifting driving 522 is a cylinder, an electric push rod or a hydraulic cylinder. In the embodiment, the lifting driving 522 is a hydraulic cylinder. The cylinder body of the lifting driving 522 is embedded in the mounting table 62. The movable end of the lifting driving 522 extends out of the mounting table 62 and is fixedly connected to the bottom of the mounting plate 521 by bolts. The cleaning tank 51 is slidably connected to the mounting plate 521. The sliding direction of the cleaning tank 51 is along the arrangement direction of the soil receiving hoppers 41 and the grab buckets 11. A vertical plate 526 is welded to the top surface of the mounting plate 521. A second guide rod 525 is arranged between the vertical plate 526 and the cleaning tank 51. The axis direction of the second guide rod 525 is consistent with the sliding direction of the cleaning tank 51. In the embodiment, the second guide rod 525 is a round rod and four second guide rods 525 are arranged at four corners of the vertical plate 526. One end of the second guide rod 525 is welded to the side wall of the cleaning tank 51, and the other end passes through the vertical plate 526 and is slidably connected to the vertical plate 526. The sliding driving 523 is a cylinder, an electric push rod or a hydraulic cylinder. In the embodiment, the sliding driving 523 is a hydraulic cylinder. The cylinder body of the sliding driving 523 is fixedly connected to the side of the vertical plate 526 away from the cleaning tank 51 by bolts. The movable end of the sliding driving 523 is welded to the side wall of the cleaning tank 51 and passes through the vertical plate 526.

[0063] When the cleaning driving 52 drives the cleaning tank 51 to enter the cleaning state, the sliding driving 523 drives the cleaning tank 51 to move away from the vertical plate 526, so that the cleaning tank 51 is located directly below the grab bucket 11. The second guide rod 525 can improve the stability of the sliding of the cleaning tank 51. The lifting driving 522 drives the mounting plate 521 to rise, so that the cleaning tank 51 moves close to the grab bucket 11, and the grab bucket 11 is located in the cleaning tank 51, thereby facilitating the cleaning assembly 53 on the cleaning tank 51 to clean the grab bucket 11. When the sliding driving 523 drives the cleaning tank 51 to enter the storage state, the lifting driving 522 drives the mounting plate 521 to descend, so that the cleaning tank 51 moves downward and the grab bucket 11 is separated from the cleaning tank 51. The sliding driving 523 drives the cleaning tank 51 to move close to the vertical plate 526, so that the cleaning tank 51 enters the storage state and thus the grab bucket 11 is positioned. When the cleaning tank 51 is in the storage state, the soil receiving hoppers 41 are located directly below the grab bucket 11, thereby facilitating the soil receiving hoppers 41 to receive soil.

[0064] Referring to Figure 6The blanking switch 42 comprises a blanking plate 421 and a blanking drive 422. The blanking plate 421 is a rectangular plate and is arranged transversely. The blanking plate 421 is in sliding connection with the earth hopper 41 between an open state and a closed state. When the blanking plate 421 is in the closed state, the blanking plate 421 shields the bottom of the earth hopper 41. When the blanking plate 421 is in the open state, the blanking plate 421 is separated from the inside of the earth hopper 41. The blanking drive 422 is an electric push rod, a pneumatic cylinder or a hydraulic cylinder. In this embodiment, the blanking drive 422 is an electric push rod. Two blanking drives 422 are arranged on the two sides of the earth hopper 41 by bolts. The movable ends of the blanking drives 422 are welded to the ends of the blanking plate 421 away from the earth hopper 41. When the earth hopper 41 is in the earth receiving state, the blanking drive 422 drives the blanking plate 421 to be in the closed state. When the earth hopper 41 is in the blanking state, i.e. the earth hopper 41 is directly above the transport vehicle 7, the blanking drive 422 drives the blanking plate 421 to be in the open state, so that the earth in the earth hopper 41 falls into the transport vehicle 7, facilitating the transfer of the earth.

[0065] With reference to Figure 7 The cleaning assembly 53 comprises a water collecting tank 531 and a plurality of spray heads 532. In this embodiment, two water collecting tanks 531 are arranged on the two sides of the cleaning tank 51. A plurality of spray heads 532 are arranged on the two side walls of the cleaning tank 51 close to the water collecting tanks 531. Six spray heads 532 are arranged on one side wall and symmetrically arranged in groups of three spray heads 532 on the two sides of the side wall. The plurality of spray heads 532 are arranged to face different directions. The spray heads 532 on the same side are in communication with the water collecting tank 531 on the same side of the cleaning tank 51. In other embodiments, the spray heads 532 can be arranged on the four side walls of the cleaning tank 51. When the cleaning assembly 53 cleans the grab bucket 11, the plurality of spray heads 532 flush the different positions of the grab bucket 11 at different angles, thereby improving the cleaning quality and rate of the cleaning assembly 53 on the grab bucket 11.

[0066] With reference to Figure 7 The two water collecting tanks 531 are in communication through a communication pipe 513. One of the water collecting tanks 531 is provided with a water inlet connector 512 in communication with the water collecting tank 531. The water inlet connector 512 is connected with a water inlet pipe 37. One end of the water inlet pipe 37 is threadedly connected with the water inlet connector 512, and the other end is in communication with the clean water pool 33 (see Figure 2 ). The water inlet pipe 37 is connected with a water pump, which is not shown in the figure. The water inlet pipe 37 pumps the water in the clean water pool 33 to the water collecting tank 531 through the water pump, thereby supplying water to the plurality of spray heads 532.

[0067] With reference to Figure 7The bottom of the cleaning tank 51 is provided with a drainage connector 511 which is in communication with the bottom of the cleaning tank 51, and a drainage pipe 38 is arranged between the drainage connector 511 and the sedimentation tank 31, one end of the drainage pipe 38 is threadedly connected with the drainage connector 511, and the other end is in communication with the sedimentation tank 31. When the cleaning device 5 is cleaning the grab bucket 11, the drainage pipe 38 discharges the sewage mixed with soil in the cleaning tank 51 into the sedimentation tank 31, which facilitates the recycling and treatment of the cleaning sewage, and at the same time, keeps the water level in the cleaning tank 51 at a low level, reducing the possibility that the water level is too high in the cleaning tank 51 to cover the spray head 532 and affect the flushing of the grab bucket 11 by the spray head 532.

[0068] In this embodiment, the lifting drive 522, the sliding drive 523, the discharging drive 422 and the water pump are electrically connected with the control chamber on the moving platform 6, so as to facilitate the operator to control the soil receiving device 4 and the cleaning device 5.

[0069] With reference to Figure 8 In this embodiment, the single-end slotting length is 6000mm, and four guide holes are arranged symmetrically at two ends of the wall slot 2 by two displacement groups, the axis of the guide hole close to the end of the wall slot 2 is flush with the end face of the wall slot 2, and the maximum distance between the two guide holes at the same end of the wall slot 2 is the single-grab width of the slotting machine 1. When the slotting machine 1 is grabbing soil, the "three-grab" method is adopted, the first grab is along the edge of the two guide holes at the same end of the wall slot 2, the second grab is along the edge of the two guide holes at the other end of the wall slot 2, and the third grab is for the middle part of the wall slot 2. By using this method, the possibility of collapse of the wall slot 2 during excavation can be reduced.

[0070] The implementation principle of the close-to-river-and-sea deep and thick soft soil layer underground continuous wall slotting construction process in this embodiment is that: when the slotting machine 1 is grabbing soil of the wall slot 2, the soil receiving device 4 receives the soil grabbed by the grab bucket 11, reduces the step of turning and discharging after completing one soil grabbing by the slotting machine 1, and improves the soil grabbing efficiency of the slotting machine 1; the cleaning device 5 flushes the soil blocks adhered to the grab bucket 11, reduces the influence of the soil blocks on the grab bucket 11 on the next soil grabbing, and further improves the soil grabbing efficiency of the slotting machine 1; the cleaning tank 51 and the water collecting tank 531 are in communication with the mud circulating system 3, which can reduce the waste of water resources.

[0071] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Unless otherwise defined, the terms "first", "second" or "third" and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. The terms "one", "another", "an" or "some" as well as similar referents in the context of describing the specification and claims are to be construed to be open-ended, i.e., to cover both singular and plural referents unless otherwise indicated. The terms "including", "containing" or "comprising" and the like are not intended to exclude other integers or steps, but to "include" or "comprise" other integers or steps unless otherwise indicated. The terms "connected", "coupled" or "pathway" are not restricted to direct connections, couplings or pathways but include indirect connections, couplings or pathways unless otherwise indicated. The terms "above", "below", "left", "right" and the like are only used to express relative positions such that if an absolute position of a described object is changed, the relative positions can also be changed accordingly.

[0072] The above are all optional embodiments of the present application, and do not limit the protection scope of the present application. Therefore, any equivalent changes made in terms of structure, shape, principle, etc. of the present application shall be covered within the protection scope of the present application.

Claims

1. A trenching construction technique for underground continuous walls in deep, water-rich, soft soil layers adjacent to rivers and seas, characterized in that: Includes the following steps: S1. Construction preparation: Clear underground obstacles, level the site, and install equipment; inspect the incoming slurry materials, conduct a proportioning test on the slurry materials, prepare the mud required for excavating the wall trench (2), and store it. S2, Pre-drilling: Drilling holes at the prefabricated locations in the wall using a rotary drilling rig; S3, Grab bucket trenching: Trenching construction is carried out using a trenching machine (1). First, the two ends of the wall trench (2) are grabbed, and then the middle part of the wall trench (2) is grabbed. The mud is circulated and supplied to the trench through the mud circulation system (3). A soil receiving device (4) and a cleaning device (5) are provided on one side of the trenching machine (1). The soil receiving device (4) is used to transfer the soil in the grab bucket (11) of the trenching machine (1) to the transport vehicle. The cleaning device (5) is used to clean the grab bucket (11) of the trenching machine (1). S4, Milling: Milling is carried out using a milling machine, and mud is circulated and supplied to the trench through a mud circulation system (3); S5. Trench Acceptance: Inspect the verticality of the trench walls, the thickness of the sediment at the bottom of the trench, and the quality of the wall. S6. Tank Cleaning and Acceptance: Clean up debris, mud, sand and other dirt in the tank, and repair and maintain any defects in the tank; The wall trench (2) is provided with a moving platform (6) on the side away from the trenching machine (1). The soil receiving device (4) and the cleaning device (5) are both located on the moving platform (6). The soil receiving device (4) is movably connected to the moving platform (6) and can move between the soil receiving state and the soil releasing state. The cleaning device (5) is movably connected to the moving platform (6) and can move between the cleaning state and the storage state. The mobile platform (6) is provided with a rotating platform (61), which is rotatably connected to the mobile platform (6). The soil receiving device (4) and the cleaning device (5) are both located on the rotating platform (61). The cleaning device (5) includes a cleaning tank (51), a cleaning drive (52), and a cleaning component (53). The cleaning tank (51) is movably connected to the rotating table (61). The cleaning drive (52) is used to drive the cleaning tank (51) to move between the cleaning state and the storage state. The cleaning component (53) is disposed on the cleaning tank (51). The cleaning drive (52) includes a mounting plate (521), a lifting drive (522), and a sliding drive (523). The mounting plate (521) is slidably connected to the rotating table (61). The lifting drive (522) is connected to the rotating table (61) and is used to raise or lower the mounting plate (521). The cleaning tank (51) is slidably connected to the mounting plate (521) and the sliding direction is towards or away from the tank forming machine (1). The sliding drive (523) is used to drive the cleaning tank (51) to slide on the mounting plate (521). The top of the cleaning tank (51) is open.

2. The trenching construction technology for underground continuous walls in deep, water-rich, soft soil layers adjacent to rivers and seas as described in claim 1, characterized in that: The soil receiving device (4) includes a soil receiving hopper (41) and a discharge switch (42). The soil receiving hopper (41) is fixedly connected to the rotating table (61), and the discharge switch (42) is located at the bottom of the soil receiving hopper (41).

3. The trenching construction technology for underground continuous walls in deep, water-rich, soft soil layers adjacent to rivers and seas, as described in claim 2, is characterized in that: The feeding switch (42) includes a feeding plate (421) and a feeding drive (422). The feeding plate (421) is slidably connected to the soil receiving hopper (41) in the transverse direction. The feeding drive (422) is used to drive the feeding plate (421) to slide.

4. The trenching construction technology for underground continuous walls in deep, water-rich, soft soil layers adjacent to rivers and seas as described in claim 1, characterized in that: The cleaning assembly (53) includes a water collection tank (531) and multiple nozzles (532). The water collection tank (531) is connected to the side wall of the cleaning tank (51). The nozzles (532) are located on the inner wall of the water collection tank (531) and are used to rinse the grab bucket (11) of the troughing machine (1).

5. The trenching construction technology for underground continuous walls in deep, water-rich, soft soil layers adjacent to rivers and seas, as described in claim 4, is characterized in that: The water collection tank (531) is equipped with a water inlet connector (512), and the mud circulation system (3) supplies water to the water collection tank (531) through the water inlet connector (512).

6. The trenching construction technology for underground continuous walls in deep, water-rich, soft soil layers adjacent to rivers and seas as described in claim 4, characterized in that: The bottom of the cleaning tank (51) is provided with a drain connector (511), through which the cleaning tank (51) discharges the cleaning wastewater into the mud circulation system (3).

Images