A method for excavating a trench by self-locking single-side circulation rotary drilling and then transversely drilling

Abstract

The application discloses a self-locking wall connecting single-side circulation rotary drilling and post-lateral drilling and trenching method, which comprises the following steps: setting a sludge treatment mechanism, a horizontal rotary drilling assembly and a vertical drilling device on a drilling machine; controlling the vertical drilling device to vertically downward drill and dig the soil to form a free section of a vertical wall connecting wall trench; controlling a rotary motor of a rotary power assembly to drive the horizontal rotary drilling device to outwardly rotate and drill and dig the soil to form a 1 / 4 circular horizontal cantilever plate trench; continuously controlling the vertical drilling device to vertically downward drill and dig the soil to form an embedded section of the vertical wall connecting wall trench; until the drilling and digging of four vertical wall connecting wall trenches and corresponding 1 / 4 circular horizontal cantilever plate trenches are completed; controlling the rotary motor to drive the horizontal rotary drilling device to outwardly rotate, and driving the horizontal rotary drilling device to drill and dig the soil to the side of a horizontal rotary drilling steel frame or to move the horizontal rotary drilling assembly along the length direction of the vertical wall connecting wall trench by using a counterforce arm hydraulic cylinder, so that a rectangular horizontal cantilever plate trench is formed, and the drilling and digging of the wall connecting wall trench is realized.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of diaphragm wall trenching machine equipment, and particularly relates to a self-locking diaphragm wall single-side circulating rotary drilling and post-lateral drilling trenching method. BACKGROUND

[0002] The underground continuous wall is a continuous reinforced concrete wall built by the method of pouring concrete into the guide pipe in sections after excavating a long and deep trench along the edge of the foundation engineering on the ground with mud protection wall as the premise, and then clearing the trench and hanging the reinforcement cage. The underground continuous wall is mainly used as a water interception, seepage prevention, load-bearing, water retaining structure or as a foundation of a building.

[0003] The existing trenching technology mainly includes excavator type and milling wheel type. Patent No. CN 110258693A "Hydraulic grab and underground continuous wall construction equipment" realizes the switching between the hydraulic grab and the double-wheel mill through the movable buckle and the connecting piece, realizes one machine with multiple functions, and drills and digs the underground continuous wall trench. In order to realize the construction of the diaphragm wall in low clearance, patent No. CN114086618A "Modular milling device for underground diaphragm wall construction" modularizes the functional components of the diaphragm wall trenching equipment into milling modules, slurry pumping modules, winding and hoisting modules, and accessory reel modules, and lays them on the track in sequence from front to back. Patent No. CN115070953A "Trenching equipment for underground continuous wall construction in building engineering" hoists the synchronous milling and hydraulic cutting equipment in the middle of the two bearing vehicles through the row frame, prevents the trench hole from being collapsed by the horizontal pressure caused by the bearing vehicle, and improves the trenching quality and the stability of the trench hole. Patent No. CN216108696U "Truss chain milling earth stirring diaphragm wall machine" and patent No. CN115897551A "Continuous wall construction equipment and construction method based on TRD method drilling machine" both set the chain with evenly distributed milling and stirring heads on the truss with active and passive driving mechanisms at both ends, and drive the chain with milling and stirring heads to drill and dig the diaphragm wall trench hole through the active driving mechanism.

[0004] The existing slotting construction method adopts interval excavation of vertical slots, and then uses a slotting machine to grab and excavate the rock-soil body in the interval slot hole to form a continuous wall. The patent number CN 115094915 A "Micro-weathered volcanic rock geological underground continuous wall slotting construction method" arranges the hole guide according to the requirements in the first opening unit and the closing unit, drills the hole guide first, and then mills the rock between the hole guides, realizes slotting, and realizes the alternating construction of multiple construction units during construction. After the hole guide drilling of one construction unit is completed, the rock between the adjacent hole guides of the construction unit is milled, and the hole guide drilling of another construction unit is carried out at the same time, realizing the drilling and milling combined cycle alternating slotting method. The patent number CN 114658050 A "Continuous wall slotting construction method containing medium weathered rock stratum" adjusts the drilling hole distance of the drilling machine to 2 m, and then uses a double-wheel slot milling machine for milling. When milling, the two rollers rotate at low speed in opposite directions, the milling teeth break and crush the rock stratum, the rock debris and mud slurry excavated by the milling wheel are discharged to the ground mud slurry station through the sand suction port in the middle of the milling wheel, and the process is repeated until the final hole is formed. The patent number CN 114687393 A "Continuous wall construction equipment and construction method thereof" realizes the drilling and excavation of the continuous wall slot through the rotation of the rotary drill and the grab bucket.

[0005] Although the existing continuous wall slotting machine and slotting method realize the slotting of the continuous wall, there are still the following problems: (1) The continuous wall needs auxiliary equipment to discharge the slurry, such as a digging bucket, which needs to be repeatedly lifted in the slot to excavate and discharge the soil, and the construction efficiency is low; (2) The existing slotting machine and slotting method are mainly for vertical continuous wall slotting construction method, and cannot realize the excavation of horizontal continuous wall / plate structure slot in rock-soil body, (3) The existing slotting machine and slotting construction method cannot form a slot at one time, and needs a slot repairing process, which affects the construction efficiency. SUMMARY

[0006] The purpose of the present application is to provide a self-locking continuous wall single-side cycle rotary drilling and excavation horizontal slotting method according to the deficiencies of the existing technology. The slotting method sequentially arranges a mud slurry treatment mechanism, a horizontal rotary drilling assembly and a vertical drilling device on the drilling machine from top to bottom to drill and excavate the vertical wall slot and the horizontal cantilever plate slot, i.e. the vertical drilling device stops excavation after excavating the vertical wall slot to the design depth of the horizontal cantilever plate by using a matrix-shaped cylindrical drilling assembly; then the horizontal rotary drilling device is driven by a rotary motor to drill and excavate a 1 / 4 circular horizontal cantilever plate slot in the soil and rotate back; then the vertical drilling device is turned on to continue to excavate the vertical wall slot to the design depth, and the drilling and excavation are repeated to form a continuous wall slot with a 1 / 4 circular horizontal cantilever plate structure; finally, the horizontal rotary drilling device is driven by a counterforce arm hydraulic cylinder or the horizontal rotary drilling device moves horizontally to horizontally drill and excavate the 1 / 4 circular horizontal cantilever plate slot array, realizing the drilling and excavation of the continuous wall slot with a rectangular horizontal cantilever plate in the soil.

[0007] The technical scheme of the present application is shown in the following technical solutions:

[0008] A self-locking single-side circular rotary drilling and horizontal drilling method for forming a wall slot of a diaphragm wall, the wall slot of the diaphragm wall comprising four vertical wall slots arranged outside a deep foundation pit and horizontal cantilever plate slots arranged at the side of the vertical wall slots and communicating with the vertical wall slots, the method comprising the following steps:

[0009] S1: sequentially arranging a sludge treatment mechanism, a horizontal rotary drilling assembly and a vertical drilling device on a drilling machine from top to bottom; wherein:

[0010] The horizontal rotary drilling assembly comprises a horizontal rotary drilling device, a rotary power assembly for driving the horizontal rotary drilling device to move, and a horizontal rotary drilling steel frame for mounting the horizontal rotary drilling device and the rotary power assembly; the rotary power assembly comprises a rotary motor and a counterforce arm hydraulic cylinder, both ends of a rotary motor shaft of the rotary motor are fixedly connected to the horizontal rotary drilling device and rotationally connected to the horizontal rotary drilling steel frame, the rotary motor drives the rotary motor shaft to rotate to drive the horizontal rotary drilling device to rotate, the counterforce arm hydraulic cylinder is connected to the rotary motor through a top rod and fixed to the horizontal rotary drilling steel frame through a base, and the counterforce arm hydraulic cylinder drives the top rod to extend and retract to drive the horizontal rotary drilling device to move horizontally; the horizontal rotary drilling steel frame is in a box-shaped structure with one side open;

[0011] The vertical drilling device comprises a plurality of cylindrical drilling assemblies arranged horizontally and forming a rectangular excavation surface;

[0012] S2: making the horizontal rotary drilling device located in the box-shaped space of the horizontal rotary drilling steel frame, controlling the vertical drilling device to vertically drill down the soil until the design depth of the horizontal cantilever plate to form a free section of the vertical wall slot of the diaphragm wall;

[0013] S3: making the vertical drilling device stop drilling, controlling the rotary motor of the rotary power assembly to drive the horizontal rotary drilling device to rotate outward in the horizontal plane to drill the soil to form the 1 / 4 circular horizontal cantilever plate slot;

[0014] S4: making the horizontal rotary drilling device rotate back to the horizontal rotary drilling steel frame and stop working, and continuing to control the vertical drilling device to vertically drill down the soil to the design depth of the vertical wall slot of the diaphragm wall to form an embedded section of the vertical wall slot of the diaphragm wall;

[0015] S5: repeating steps S2-S4 until the drilling of the four vertical wall slots of the diaphragm wall and the corresponding 1 / 4 circular horizontal cantilever plate slots is completed;

[0016] S6: controlling the rotary motor of the rotary power assembly to drive the horizontal rotary drilling device to rotate outward in the horizontal plane, and using the counterforce arm hydraulic cylinder of the rotary power assembly to drive the horizontal rotary drilling device to drill the earth body to the side of the horizontal rotary drilling steel frame in the horizontal plane or to move the horizontal rotary drilling assembly along the length direction of the diaphragm wall slot, so as to form a rectangular horizontal cantilever plate slot, thereby realizing the drilling of the diaphragm wall slot.

[0017] In step S1, the sludge treatment mechanism comprises a stirring device, a crushing device, a sludge suction system, a sludge discharge system and a grouting system.

[0018] The stirring device comprises a stirring box and a stirring mechanism; the stirring box is provided with a sludge suction port, a sludge discharge port and a grout inlet; the stirring mechanism comprises a main gear and a plurality of auxiliary gears in transmission with the main gear; the main gear is driven by a stirring motor; the main gear is coaxially provided with a stirring main shaft extending into the stirring box; the stirring main shaft is provided with stirring blades; the auxiliary gears are coaxially provided with stirring auxiliary shafts extending into the stirring box; the stirring auxiliary shafts are provided with stirring blades.

[0019] The sludge suction system comprises a sludge suction main pipe, vertical sludge suction branch pipes and horizontal rotary sludge suction branch pipes branching from the suction end of the sludge suction main pipe; the sludge suction port of the stirring box is connected with the sludge suction main pipe, and the sludge suction main pipe and the sludge suction port are provided with the crushing device therebetween; the crushing device comprises a fan for suction and crushing blades for crushing sludge; the suction heads of the vertical sludge suction branch pipes are connected to the vertical drilling device; the suction heads of the horizontal rotary sludge suction branch pipes are connected to the horizontal rotary drilling assembly; the suction heads are provided with sludge suction valves; the pipe body of the horizontal rotary sludge suction branch pipes adopts an extension pipe.

[0020] The grouting system comprises a grouting pipe and a grouting pump arranged on the grouting pipe; one end of the grouting pipe is connected in communication with the grout inlet of the stirring box, so as to pump the slurry into the stirring box.

[0021] The sludge discharge system comprises a sludge discharge pipe and a sludge discharge pump arranged on the sludge discharge pipe; one end of the sludge discharge pipe is connected in communication with the sludge discharge port of the stirring box, so as to pump the sludge in the stirring box to the ground for collection.

[0022] The sludge suction main pipe, the sludge discharge pipe and the grouting pipe are arranged along the pipeline fixing frame.

[0023] In step S1, the vertical drilling device comprises a vertical drilling U-shaped fork plate and a plurality of cylindrical drilling assemblies installed on the vertical drilling U-shaped fork plate, the vertical drilling U-shaped fork plate is composed of a vertical drilling web plate, vertical drilling wing plates arranged on both sides of the vertical drilling web plate, and vertical drilling steel support plates welded perpendicularly on the vertical drilling web plate, the cylindrical drilling assembly comprises two cylinders, a plurality of stirring knife assemblies uniformly arranged on the surface of the cylinders, and a motor driving the rotation of the cylinders, the stirring knife assembly is composed of a stirring knife base and a stirring knife obliquely fixed on the stirring knife base, and the rotating shaft of the motor penetrates through the two cylinders and is correspondingly arranged in the rotating shaft hole of the vertical drilling wing plate.

[0024] In step S1, the horizontal rotary drilling device comprises a horizontal rotary drilling U-shaped fork plate and a plurality of vertically arranged horizontal rotary drills installed on the horizontal rotary drilling U-shaped fork plate, the horizontal rotary drilling device comprises a first horizontal rotary drill and a second horizontal rotary drill arranged on both sides of the horizontal rotary drilling device respectively, and a rectangular excavation surface is formed between the first horizontal rotary drills and between the second horizontal rotary drills, the horizontal rotary drilling U-shaped fork plate is composed of two oppositely arranged horizontal rotary drilling web plates, a baffle plate connected to the same side of the two horizontal rotary drilling web plates, horizontal rotary drilling wing plates arranged at both ends of the horizontal rotary drilling web plate, a horizontal rotary drilling side stand plate arranged on one side of the horizontal rotary drilling web plate, and horizontal rotary drilling steel support plates welded perpendicularly on the horizontal rotary drilling web plate.

[0025] The horizontal rotary drilling steel frame is composed of a horizontal rotary drilling side stand plate, a horizontal rotary drilling upper side plate, a horizontal rotary drilling lower side plate, a horizontal rotary drilling left side stand plate, and a horizontal rotary drilling right side stand plate, and the horizontal rotary drilling device and the rotary power assembly are located in the box-shaped space of the horizontal rotary drilling steel frame; a rotary motor slide is formed on the horizontal rotary drilling upper side plate and the horizontal rotary drilling lower side plate, the two rotary motor slides are oppositely arranged, the rotary motor shafts of the rotary motors are respectively installed in the two rotary motor slides, and the reverse force arm hydraulic cylinder drives the extension and retraction of the top rod to drive the rotary motor shaft to move along the length direction of the rotary motor slide.

[0026] In step S1, the drilling rig is hoisted using cables from a hoisting assembly. The hoisting assembly includes a vehicle-mounted platform, a steel column, a tie rod, a hinge shaft, a guide rail, a slider, a steel cantilever beam, a winch motor, and a cable support. The steel column is vertically mounted on the vehicle-mounted platform. The upper end of the tie rod is hinged to the upper end of the steel column, and the lower end is hinged to the hinge shaft fixed on the vehicle-mounted platform. The guide rail is vertically mounted and fixed along the steel column. The slider is slidably mounted on the guide rail. The steel cantilever beam is fixed to the slider. The winch motor is fixed to the steel cantilever beam, and the cable support is fixed below the steel cantilever beam. The winch motor drives the cable to move up and down in the vertical direction.

[0027] In steps S2 and S4, during the vertical drilling process, the suction valves at the suction heads of all horizontal rotating suction pipes are closed, and the suction valves at the suction heads of the vertical suction pipes are opened to draw the crushed mud from the vertical drilling device into the crushing device. The crushing device further crushes the drawn mud and sends it into the mixing tank for mixing. Meanwhile, the grouting system pumps slurry into the mixing tank in real time to mix with the mud. The slag discharge system pumps the mixture of mud and slurry from the mixing tank to the ground for collection and treatment in real time.

[0028] In step S3, during the process of the rotary power component driving the horizontal rotary drilling device to drill outwards in a 1 / 4 circular horizontal cantilever slab groove on the horizontal plane, the slag suction valve at the suction head of the vertical slag suction branch pipe is closed, and the slag suction valve at the suction head of the horizontal rotary slag suction branch pipe corresponding to the first horizontal rotary drill is opened, so as to suck the crushed mud and slag from the horizontal rotary drilling device into the crushing device. The crushing device further crushes the sucked mud and slag and sends it into the mixing tank for mixing. Meanwhile, the grouting system pumps slurry into the mixing tank in real time to mix with the mud and slag. The slag discharge system pumps the mud and slag mixture from the mixing tank to the ground for collection and treatment in real time.

[0029] In step S6, during the process of the rotary power assembly driving the horizontal rotary drilling device to drill a rectangular horizontal cantilever plate groove on the side of the horizontal rotary drilling steel frame on the horizontal plane, the suction valve at the suction head of the vertical suction pipe is closed, and the suction valve at the suction head of the horizontal rotary suction pipe corresponding to the second horizontal rotary drill on any of the horizontal rotary drilling devices is opened, so as to suck the crushed mud and slag from the horizontal rotary drilling device into the crushing device. The crushing device further crushes the sucked mud and slag and sends it into the mixing tank for mixing. The grouting system pumps mud slurry into the mixing tank in real time to mix with the mud and slag. The slag discharge system pumps the mud and slag mixture in the mixing tank to the ground for collection and treatment in real time.

[0030] The advantages of the present application are:

[0031] (1) By cable, vertical cylindrical drill, cylindrical drill with horizontal translation and rotation, the soil body is drilled and excavated to realize the trench of the ground connected wall with horizontal cantilever plate structure;

[0032] (2) The horizontal cantilever plate structure and the vertical ground connected wall body can be once grooved without other mechanical assistance, so as to improve the construction efficiency and save the construction and equipment cost;

[0033] (3) By the cylindrical drill device which can horizontally translate and horizontally rotate, a 1 / 4 circular horizontal cantilever plate groove array is first drilled and excavated, and then a rectangular horizontal cantilever plate groove is once excavated, so as to realize the drilling and excavation of the rectangular horizontal cantilever plate groove in the soil body, and improve the grooving construction efficiency;

[0034] (4) By vacuum slag suction and mud combined slag discharge, the construction environment is improved, and the mud cost is saved;

[0035] (5) The soil is secondarily crushed by the crushing box, so that the groove hole can be better discharged, and the blockage of the slag discharge pipe is prevented;

[0036] (6) The drilling and excavation and slag discharge functions are simultaneously provided, the drilling machine has high integration degree, the uninterrupted and synchronous drilling and excavation and slag discharge are realized, the construction process is reduced, the construction cost is saved, and the grooving construction efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is a schematic diagram of embodiment 1 of the present application;

[0038] Figure 2 is a partial schematic diagram of embodiment 1 of the present application;

[0039] Figure 3 is a cross-sectional position schematic diagram of embodiment 1 of the present application;

[0040] Figure 4 is an A-A cross-sectional view in Figure 3 ;

[0041] Figure 5 is a schematic diagram of a vertical drilling device in embodiment 1 of the present application;

[0042] Figure 6 is a B-B cross-sectional view in Figure 5 ;

[0043] Figure 7 is a C-C cross-sectional view in Figure 3 ;

[0044] Figure 8 is a D-D cross-sectional view in Figure 3 ;

[0045] Figure 9 is Figure 3 a cross-sectional view along E-E in FIG. 1;

[0046] Figure 10 is Figure 9 a cross-sectional view along F-F in FIG. 1;

[0047] Figure 11 is Figure 9 a cross-sectional view along G-G in FIG. 1;

[0048] Figure 12 is Figure 3 a cross-sectional view along H-H in FIG. 1;

[0049] Figure 13 is Figure 3 a cross-sectional view along I-I in FIG. 1;

[0050] Figure 14 is Figure 3 a cross-sectional view along J-J in FIG. 1;

[0051] Figure 15 is Figure 3 a cross-sectional view along K-K in FIG. 1;

[0052] Figure 16 is Figure 3 a cross-sectional view along L-L in FIG. 1;

[0053] Figure 17 is a schematic diagram of a construction process flow of a wall slot of a bored and dug self-locking counter-pressure diaphragm wall in Embodiment 1 of the present application;

[0054] Figure 18 is Figure 17 a cross-sectional view along M-M in FIG. 1;

[0055] Figure 19 is a schematic diagram of a construction process flow of a wall slot of a bored and dug self-locking counter-pressure diaphragm wall in Embodiment 2 of the present application;

[0056] Figure 20 is a schematic diagram of a construction process flow of a wall slot of a bored and dug self-locking counter-pressure diaphragm wall in Embodiment 3 of the present application;

[0057] Figure 21 is Figure 20 a cross-sectional view along N-N in FIG. 1;

[0058] As Figures 1-21 shown, the marks in the figure respectively represent:

[0059] 1. vertical drilling device, 2. horizontal rotary drilling assembly, 3. stirring device, 4. crushing device, 5. slag suction system, 6. grouting system, 7. slag discharge system, 8. pipeline fixing frame, 9. hoisting assembly;

[0060] 11. Cylinder drill assembly, 12. Vertical drill U-shaped fork plate, 111. Cylinder, 112. Stirring blade assembly, 113. Motor, 114. Motor rotating shaft, 121. Vertical drill wing plate, 122. Vertical drill web plate, 123. Vertical drill steel support, 124. Rotating shaft hole, 125. Vertical slag suction branch pipe through hole, 1121. Stirring blade base, 1122 stirring blade;

[0061] 21. Horizontal rotary drill device, 22. Rotary power assembly, 23. Horizontal rotary drill steel frame;

[0062] 211. Horizontal rotary drill U-shaped fork plate, 2111. Horizontal rotary drill wing plate, 2112. Horizontal rotary drill web plate, 2113. Horizontal rotary drill side stand plate, 2114. Horizontal rotary drill steel support, 2115. Horizontal rotary drill slag suction branch pipe through hole, 2116. Rotating motor shaft fixing hole, 2117. Baffle plate;

[0063] 221. Rotary motor, 222. Rotating motor shaft, 223. Fastener, 224. Counterforce arm hydraulic cylinder, 225. Counterforce arm hydraulic cylinder top rod;

[0064] 231. Horizontal rotary drill side stand guard plate, 232. Horizontal rotary drill upper side guard plate, 233. Horizontal rotary drill lower side guard plate, 234. Horizontal rotary drill left side stand guard plate, 235. Horizontal rotary drill right side stand guard plate, 236. Rotating motor slide, 237. Horizontal rotary slag suction main pipe through hole;

[0065] 31. Stirring box, 32. Double-layer large blade, 33. Stirring main rotating shaft, 34. Double-layer small blade, 35. Stirring auxiliary rotating shaft, 36. Single-layer small blade, 37. Main gear, 38. Main gear isolation pad, 39. Auxiliary gear, 310. Auxiliary gear isolation pad, 311. Steel cover plate, 312. Stirring motor;

[0066] 41. Crushing box, 42. Middle partition plate, 43. Connection pipe, 44. Frame, 45. Fan motor, 46. Fan blade, 47. Crushing knife, 48. Filter screen;

[0067] 51. Slag suction main pipe, 52. Vertical slag suction branch pipe, 53. Horizontal rotary slag suction branch pipe, 54. Telescopic pipe, 55. Suction head, 56. Vertical slag suction valve, 57 horizontal rotary slag suction valve;

[0068] 61. Grouting pipe, 62. Grouting pump;

[0069] 71. Slag discharge pipe, 72. Slag discharge pump;

[0070] 81. Top steel plate, 82. Middle steel plate, 83. Bottom steel plate, 84. Side stand plate, 85. Square through hole, 86. Slag discharge pipe fixing hole, 87. Grouting pipe fixing hole;

[0071] 91. Hoist motor; 92. Fixed shaft; 93. Cable; 94. Cable support; 95. Steel cantilever beam; 96. Slider; 97. Steel column; 98. Guide rail; 99. Hinge shaft; 910. Tie rod; 911. Vehicle platform;

[0072] a. Soil stratum, b. Drilling rig, c. Diaphragm wall trench, c1. Vertical diaphragm wall trench, c2. Free section diaphragm wall trench, c3. Fixed section diaphragm wall trench, c4. Horizontal cantilever slab trench. Implementation

[0073] The features and other related features of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate understanding by those skilled in the art:

[0074] Example 1: As Figures 1-18 As shown, this embodiment specifically relates to a method for creating a trench by horizontal drilling after single-sided cyclic rotary drilling of a self-locking diaphragm wall. In this embodiment, the trenching method is used to excavate a self-locking counter-pressure diaphragm wall trench. The self-locking counter-pressure diaphragm wall trench includes four vertical diaphragm wall trenches c1 (used for constructing the vertical diaphragm wall) located on the outer perimeter of the deep foundation pit, and a horizontal cantilever slab trench c4 (used for constructing the horizontal cantilever slab) located outside and connected to the vertical diaphragm wall trenches c1. The four vertical diaphragm wall trenches c1 form a rectangular structure, and one side of each vertical diaphragm wall trench c1 extends a distance away from the deep foundation pit. The trenching method specifically includes the following steps:

[0075] (S1) The hoisting assembly 9 and the drilling rig b are installed on the ground of the construction site. The drilling rig is hoisted by the lower end of the cable 93 on the hoisting assembly 9. The drilling rig b includes, from top to bottom, a pipe fixing frame 8, a mud treatment mechanism, a horizontal rotary drilling assembly 2 and a vertical drilling device 1. The mud treatment mechanism includes a mixing device 3, a crushing device 4, a slag suction system 5, a slag discharge system 7 and a grouting system 6.

[0076] like Figure 1 and Figure 2As shown, the hoisting assembly 9 includes a vehicle platform 911, a steel column 97, a pull rod 910, a hinge shaft 99, a guide rail 98, a sliding block 96, a steel suspension beam 95, a cable support 94, a winch motor 91, a fixed shaft 92, and a cable 93. The vehicle platform 911 has trackable caterpillar wheels and is located on the ground. The steel column 97 is vertically arranged at the front end of the vehicle platform 911. The pull rod 910 is diagonally braced to the steel column 97. Specifically, the upper end of the pull rod 910 is hingedly connected to the upper end of the steel column 97, and the lower end is hingedly connected to the hinge shaft 99 of the vehicle platform 911. The guide rail 98 is fixedly arranged along the steel column 97 to form a vertical track. The sliding block 96 is slidably arranged on the guide rail 98 and can slide in the vertical direction under the drive of a power mechanism. The steel suspension beam 95 is fixed to the sliding block 96. The cable support 94 is fixed to the bottom surface of the steel suspension beam 95. The winch motor 91 is fixed to the steel suspension beam 95 through the fixed shaft 92. The winch motor 91 is used to drive the cable 93 and the drilling machine at the lower end of the cable 93 to move up and down. It should be noted that, due to the large weight of the drilling machine, the drilling machine can move downward under its own weight without the need for the downward pressure of the drill rod as required in the prior art. In addition, the cable 93 has sufficient length to meet the drilling requirements of the diaphragm wall slot.

[0077] As shown in Figures 1-7 The vertical drilling device 1 is used for drilling and excavating a vertical diaphragm wall slot and mainly includes a plurality of cylindrical drill assemblies 11 and a vertical drilling U-shaped fork plate 12 serving as a mounting frame. The vertical drilling U-shaped fork plate 12 mainly includes a vertical drilling web plate 122 and vertical drilling wing plates 121 located on both sides of the vertical drilling web plate 122. Based on the number of cylindrical drill assemblies 11, a vertical drilling steel support 123 is vertically welded at the middle position of the vertical drilling web plate 122. The cylindrical drill assembly 11 is composed of two cylindrical drills, one motor 113, and one motor shaft 114. In this embodiment, the number of cylindrical drills is four, and they are arranged in a matrix to form a rectangular cutting surface. During downward cutting, a rectangular hole is formed. The matrix distribution here means that the cylindrical drills are arranged on both sides of the vertical drilling steel support 123. The cylindrical drill includes a cylinder 111 and a stirrer assembly 112 uniformly distributed on the surface of the cylinder 111. The centrally arranged vertical drilling steel support 123 is welded or bolted to the motor housing. The motor shaft 114 of the motor 113 drives the two side cylinders 111 to rotate. The end of the motor shaft 114 is supported in the shaft hole 124 of the two side wing plates 121. The stirrer assembly 112 includes a stirrer base 1121 and a stirrer 1122. The stirrer 1122 is obliquely installed under the fixation of the stirrer base 1121 to facilitate the excavation of the soil body. In addition, a plurality of vertical slurry suction branch pipe through holes 125 are formed in the vertical drilling web plate 122 to facilitate the extension of the suction head 55 of the vertical slurry suction branch pipe 52 in the slurry suction system 5 into the vertical drilling U-shaped fork plate 12 to suck the excavated slurry.

[0078] AsFigures 1-3 As shown in Figs. 8-11, the horizontal rotary drilling assembly 2 is used for the horizontal cantilevered panel slot drilling, mainly comprising a horizontal rotary drilling device 21, a rotary power assembly 22 for driving the horizontal rotary drilling device 21 to move, and a horizontal rotary drilling steel frame 23 for mounting the horizontal rotary drilling device 21 and the rotary power assembly 22. The horizontal rotary drilling device 21 comprises a horizontal rotary drilling U-shaped fork plate 211 and a plurality of horizontal rotary drills mounted on the horizontal rotary drilling U-shaped fork plate 211, and the horizontal rotary drills are vertically arranged in a matrix, wherein the horizontal rotary drilling device 21 comprises a first horizontal rotary drill and a second horizontal rotary drill respectively located on both sides of the horizontal rotary drilling device 21, and the first horizontal rotary drill and the second horizontal rotary drill can respectively form a rectangular excavation face. Except that the arrangement mode is different (the horizontal rotary drills are vertically arranged, and the cylindrical drill assembly 11 is horizontally arranged), the structure and function of the horizontal rotary drills are respectively the same as those of the cylindrical drill assembly 11, and thus will not be described here. The horizontal rotary drilling U-shaped fork plate 211 is composed of two oppositely arranged horizontal rotary drilling web plates 2112, a baffle 2117 connected to the same side of the two horizontal rotary drilling web plates 2112, horizontal rotary drilling wing plates 2111 arranged at the (upper and lower) ends of the horizontal rotary drilling web plates 2112, horizontal rotary drilling side vertical plates 2113 arranged on one side of the horizontal rotary drilling web plates 2112, and horizontal rotary drilling steel supports 2114 (having the same function as the vertical drilling steel supports 123) vertically welded on the horizontal rotary drilling web plates 2112, wherein the horizontal rotary drilling side vertical plates 2113 are used to separate the horizontal rotary drills and the rotary power assembly 22. In addition, a plurality of horizontal rotary drilling slag suction branch pipe through holes 2115 are arranged on the horizontal rotary drilling web plates 2112, so that the suction heads 55 of the horizontal rotary slag suction branch pipes 53 in the slag suction system 5 extend into the horizontal rotary drilling U-shaped fork plate 211 to suck the excavated sludge.

[0079] The horizontal rotary drilling steel frame 23 is a box-shaped structure with one side open, which is composed of a horizontal rotary drilling side vertical baffle 231, a horizontal rotary drilling upper side baffle 232, a horizontal rotary drilling lower side baffle 233, a horizontal rotary drilling left side vertical baffle 234, and a horizontal rotary drilling right side vertical baffle 235, and the horizontal rotary drilling device 21 and the rotary power assembly 22 are located in the box-shaped space of the horizontal rotary drilling steel frame 23. A rotary motor slide 236 is formed on each of the horizontal rotary drilling upper side baffle 232 and the horizontal rotary drilling lower side baffle 233, and the two rotary motor slides 236 are oppositely arranged, the rotary motor shaft 222 of the rotary motor 221 is respectively mounted in the two rotary motor slides 236 at both ends, and the rotary motor shaft 222 can respectively move along the length direction of the two rotary motor slides 236. In addition, a horizontal rotary slag suction main pipe through hole 237 is arranged on the horizontal rotary drilling upper side baffle 232, so as to fix the slag suction main pipe 51 of the slag suction system 5.

[0080] The rotary power assembly 22 is used to drive the rotation and translation of the horizontal rotary drilling device 21. The rotary power assembly 22 comprises a rotary motor 221 and a counterforce arm hydraulic cylinder 224, and the rotary motor shaft 222 of the rotary motor 221 is fixedly connected to the horizontal rotary drilling device 21 and rotationally connected to the horizontal rotary drilling steel frame 23. The upper end of the rotary motor shaft 222 of the rotary motor 221 penetrates the rotary motor shaft fixing hole 2116 of the upper horizontal rotary drilling wing plate 2111 and enters the rotary motor sliding channel 236 of the upper side guard plate 232 of the horizontal rotary drilling device 21, the lower end of the rotary motor shaft 222 of the rotary motor 221 penetrates the rotary motor shaft fixing hole 2116 of the lower horizontal rotary drilling wing plate 2111 and enters the rotary motor sliding channel 236 of the lower side guard plate 233 of the horizontal rotary drilling device 21, and the rotary motor shaft 222 of the rotary motor 221 is fixedly connected to the horizontal rotary drilling wing plate 2111 of the horizontal rotary drilling U-shaped fork plate 211 by means of fasteners 223. In this embodiment, the rotary motor 221 drives the rotary motor shaft 222 to rotate, so as to drive the horizontal rotary drilling device 21 to rotate by 90 degrees in the horizontal plane, thereby forming a 1 / 4 circular horizontal cantilever plate groove. The counterforce arm hydraulic cylinder top rod 225 of the counterforce arm hydraulic cylinder 224 is connected to the rotary motor 221 and fixed to the horizontal rotary drilling steel frame 23 (the right side vertical guard plate 235 of the horizontal rotary drilling device), and the counterforce arm hydraulic cylinder 224 drives the counterforce arm hydraulic cylinder top rod 225 to extend and retract, so as to drive the rotary motor shaft 222 of the rotary motor 221 to move along the length direction of the rotary motor sliding channel 236, thereby realizing the horizontal movement of the horizontal rotary drilling device 21.

[0081] As shown in Figures 1-16 The sludge treatment mechanism comprises a stirring device 3, a crushing device 4, a sludge suction system 5, a sludge discharge system 7 and a grouting system 6.

[0082] The stirring device 3 comprises a stirring box 31 and a stirring mechanism. The stirring box 31 is fixedly installed on the upper surface of the horizontal rotary drill upper side guard plate 232. The stirring mechanism comprises a main gear 37 and a plurality of auxiliary gears 39 which are driven by the main gear 37. The main gear 37 is driven to rotate by a stirring motor 312. The rotating main gear 37 in turn drives the auxiliary gears 39 to rotate. The main gear 37 is coaxially provided with a stirring main rotating shaft 33 which extends into the stirring box 31. The stirring main rotating shaft 33 is provided with stirring blades. The stirring blades herein are double-layer large blades 32. The auxiliary gears 39 are coaxially provided with stirring auxiliary rotating shafts 35 which extend into the stirring box 31. The stirring auxiliary rotating shafts 35 are also provided with stirring blades. The stirring blades on some of the stirring auxiliary rotating shafts 35 are double-layer small blades 34. The stirring blades on the other stirring auxiliary rotating shafts 35 are single-layer small blades 36. The mud and slurry in the stirring box 31 are stirred to obtain uniformly mixed slurry, which is beneficial to discharge. In order to avoid the slurry in the stirring box 31 from penetrating into the gear box where the main gear 37 and the auxiliary gears 39 are located during the stirring process, a main gear isolation pad 38 is arranged at the joint of the stirring main rotating shaft 33 and the stirring box 31. An auxiliary gear isolation pad 310 is arranged at the joint of the stirring auxiliary rotating shaft 35 and the stirring box 31. As shown in Figure 2 , a steel cover plate 311 is arranged on the top of the gear box where the main gear 37 and the auxiliary gears 39 are located, and is used to be connected with the pipeline fixing frame 8. The stirring box 31 is provided with a sludge suction port, a sludge discharge port and a slurry inlet port.

[0083] The sludge suction system 5 is connected with the sludge suction port of the stirring box 31. The sludge suction system 5 mainly comprises a sludge suction main pipe 51, a vertical sludge suction branch pipe 52, a horizontal rotary sludge suction branch pipe 53 and the crushing device 4. One end of the sludge suction main pipe 51 is connected with the sludge suction port of the stirring box 31 through the crushing device 4. The other end (i.e. the suction end) of the sludge suction main pipe 51 is bifurcated into the vertical sludge suction branch pipe 52 and the horizontal rotary sludge suction branch pipe 53. As shown in Figure 2As shown, the vertical sludge suction branch pipe 52 extends into the vertical drilling device 1, and the suction head 55 of the vertical sludge suction branch pipe 52 is close to the cylindrical drilling assembly 11, so that it can suck the soil sludge stirred by cutting, and the vertical sludge suction valve 56 is arranged at the suction head 55 for controlling the opening and closing of the pipeline. The horizontal rotary sludge suction branch pipe 53 extends into the horizontal rotary drilling assembly 2, and the suction head 55 of the horizontal rotary sludge suction branch pipe 53 is close to the horizontal rotary drilling device 21, so that it can suck the soil sludge stirred by cutting, and the horizontal rotary sludge suction valve 57 is arranged at the suction head 55 for controlling the opening and closing of the pipeline, wherein part of the pipeline of the horizontal rotary sludge suction branch pipe 53 is in the form of an extension pipe 54 to adapt to the rotation of the horizontal rotary drilling device 21. The sucked sludge enters the mixing box 31 after being crushed by the crushing device 4 into fine particles, and the crushing device 4 mainly includes a crushing box 41, a partition plate 42, a connecting pipe 43, a rack 44, a fan motor 45, fan blades 46, crushing knives 47, and a filter screen 48. The partition plate 42 is arranged obliquely in the crushing box 41 to form a slope for the flow of sludge. The fan motor 45 is installed on the top plate in the crushing box 41 through the rack 44, and the fan blades 46 are arranged on the rotating shaft of the fan motor 45. The high-speed rotating fan motor 45 and fan blades 46 can form a negative pressure suction in the sludge main pipe 51, and the crushing knives 47 are installed at the installation position of the fan motor 45, so that the sucked sludge must pass through the crushing knives 47 before entering the mixing box 31 through the connecting pipe 43. The filter screen 48 is arranged at the end surface of the fan motor 45 to filter large particle sludge, so as to avoid the sludge flowing into the mixing box 31 from the fan motor 45.

[0084] The slurry inlet of the mixing box 31 is connected to the grouting system 6 on the ground, and the grouting system 6 mainly includes a grouting pipe 61 and a grouting pump 62. The grouting pipe 61 pumps the slurry with a suitable concentration into the mixing box 31 through the grouting pump 62, mixes with the sludge sucked up, and becomes a liquid, which is convenient for sucking outwards.

[0085] The sludge outlet of the mixing box 31 is connected to the sludge discharge system 7 on the ground, and the sludge discharge system 7 includes a sludge discharge pipe 71 and a sludge discharge pump 72. The lower end of the sludge discharge pipe 71 is connected to the sludge outlet of the mixing box 31 and extends downward to a certain depth, so as to facilitate the discharge of more slurry. The sludge discharge pipe 71 discharges the uniformly mixed slurry from the mixing box 31 to the ground through the sludge discharge pump 72 for collection and treatment.

[0086] As Figures 1-3As shown in Figures 14-16, the pipe fixing frame 8 has a box-shaped structure, including a top steel plate 81, a middle steel plate 82, a bottom steel plate 83, and several side upright plates 84 connecting the three. Furthermore, a square through hole 85 is provided on the bottom steel plate 83 for the mixing motor 312 to pass through. Additionally, slag discharge pipe fixing holes 86 for the slag discharge pipe 71 and grouting pipe fixing holes 87 for the grouting pipe 61 are provided on the top steel plate 81, middle steel plate 82, and bottom steel plate 83. To prevent pipe swaying during drilling, the pipe fixing frame 8 provides fixation for each passing pipe. It should be noted that four lifting points are provided on the top steel plate 81 for cable 93 connection to ensure stable hoisting of the pipe fixing frame 8.

[0087] (S2) such as Figure 17 As shown, before drilling downwards, the horizontal rotary drilling device 21 is positioned in the box-shaped space of the horizontal rotary drilling steel frame 23; then the vertical drilling device 1 is controlled to drill vertically downwards into the soil layer a until the design depth of the horizontal cantilever slab, so as to form the free section of the vertical diaphragm wall groove c1, the diaphragm wall groove c2.

[0088] During this downward drilling process, the horizontal rotary slag suction valve 57 at the suction head 55 of the (all) horizontal rotary slag suction branch pipe 53 is closed, and the vertical slag suction valve 56 at the suction head 55 of the vertical slag suction branch pipe 52 is opened to suck the crushed mud from the vertical drilling device 1 into the crushing device 4. The crushing device 4 crushes the sucked mud a second time and sends it into the mixing tank 31 for mixing. Meanwhile, the grouting system 6 pumps mud into the mixing tank 31 in real time to mix with the mud. The slag discharge system 7 pumps the mud and mud mixture from the mixing tank 31 to the ground for collection and treatment in real time.

[0089] (S3) such as Figure 17 As shown, the vertical drilling device 1 is stopped and held at that depth. The rotary motor 221 of the horizontal rotary drilling device 21 and the rotary power assembly 22 is turned on. The rotary motor 221 drives the horizontal rotary drilling device 21 (the horizontal rotary drill on one side, i.e. the first horizontal rotary drill) to rotate 90 degrees outward from the horizontal rotary drilling steel frame 23 on the horizontal plane to drill the soil and form a 1 / 4 circular horizontal cantilever plate groove c4.

[0090] In the process of drilling at this level, the vertical suction valve 56 at the suction head 55 of the vertical suction branch pipe 52 is closed, and the horizontal rotary suction valve 57 at the suction head 55 of the horizontal rotary suction branch pipe 53 (corresponding to the horizontal rotary drill on one side of the horizontal rotary drilling device 21) is opened to suck the broken sludge of the horizontal rotary drilling device 21 into the crushing device 4, the crushing device 4 secondarily crushes the sucked sludge and sends it into the mixing box 31 for mixing, and the grouting system 6 pumps the slurry into the mixing box 31 in real time to mix with the sludge; the sludge and slurry mixture in the mixing box 31 is pumped out to the ground by the sludge discharge system 7 for collection and treatment.

[0091] (S4) As shown in Figure 17 , after drilling the 1 / 4 circular horizontal cantilever plate groove c4, the rotary motor 221 of the rotary power assembly drives the horizontal rotary drilling device 21 to rotate back 90 degrees into the horizontal rotary drilling steel frame 23; then the vertical drilling device 1 is used to continue drilling to the designed depth to form the embedded segment of the vertical ground connecting wall groove c3 of the vertical ground connecting wall groove c1;

[0092] In the process of drilling at this level, the vertical suction valve 56 at the suction head 55 of the vertical suction branch pipe 52 is closed, and the horizontal rotary suction valve 57 at the suction head 55 of the horizontal rotary suction branch pipe 53 (corresponding to the horizontal rotary drill on one side of the horizontal rotary drilling device 21) is opened to suck the broken sludge of the horizontal rotary drilling device 21 into the crushing device 4, the crushing device 4 secondarily crushes the sucked sludge and sends it into the mixing box 31 for mixing, and the grouting system 6 pumps the slurry into the mixing box 31 in real time to mix with the sludge; the sludge and slurry mixture in the mixing box 31 is pumped out to the ground by the sludge discharge system 7 for collection and treatment.

[0093] (S5) As shown in Figure 17 , repeat steps S2-S4 until the drilling of four vertical ground connecting wall grooves c and their corresponding semicircular horizontal cantilever plate grooves c4 is completed.

[0094] (S6) As shown in Figure 17 , the horizontal rotary drilling assembly 2 is opposite the 1 / 4 circular horizontal cantilever plate groove c4, the rotary motor 221 of the rotary power assembly 22 drives the horizontal rotary drilling device 21 to rotate 90 degrees outward in the horizontal plane, and the counterforce arm hydraulic cylinder 224 of the rotary power assembly 22 drives the horizontal rotary drilling device 21 (the horizontal rotary drill on the other side, i.e. the second horizontal rotary drill) to drill the soil on the side of the horizontal rotary drilling steel frame 23 (or move the horizontal rotary drilling assembly 2 along the length direction of the vertical ground connecting wall groove c1) to form a rectangular horizontal cantilever plate groove c4, thereby realizing the drilling of the ground connecting wall groove c; in addition, as shown in Figure 18 , the top surface of the horizontal cantilever plate groove c4 is flush with the bottom surface of the deep foundation pit;

[0095] In the process of drilling at this level, the vertical suction valve 56 at the suction head 55 of the vertical suction branch pipe 52 is closed, and the horizontal rotary suction valve 57 at the suction head 55 of the horizontal rotary suction branch pipe 53 (corresponding to the horizontal rotary drill on the other side of the horizontal rotary drill device 21) is opened to suck the broken slurry of the horizontal rotary drill device 21 into the crushing device 4, the crushing device 4 performs secondary crushing on the sucked slurry and sends it into the mixing box 31 for mixing, and the grouting system 6 pumps the slurry into the mixing box 31 in real time to mix with the slurry; the slurry and slurry mixture in the mixing box 31 are pumped out to the ground by the slurry discharge system 7 for collection and treatment.

[0096] The beneficial effects of the embodiment are:

[0097] (1) By using the cable, vertical cylindrical drill, cylindrical drill with horizontal translation and rotation, the ground wall groove with horizontal cantilever plate structure in the soil is realized;

[0098] (2) The horizontal cantilever plate structure and the vertical ground wall body can be grooved at one time without the need for other mechanical assistance, thereby improving the construction efficiency and saving the construction and equipment costs;

[0099] (3) By using the cylindrical drill device with horizontal translation and horizontal rotation, a 1 / 4 circular horizontal cantilever plate groove array is first drilled and excavated, and then a rectangular horizontal cantilever plate groove is excavated at one time, thereby realizing the drilling and excavation of the rectangular horizontal cantilever plate groove in the soil and improving the grooving construction efficiency;

[0100] (4) By using the vacuum slurry suction and slurry combined slurry discharge, the construction environment is improved, and the slurry cost is saved;

[0101] (5) The soil is secondarily crushed by the crushing box, which can better discharge the groove hole and prevent the blockage of the slurry discharge pipe;

[0102] (6) The drilling and excavation functions are simultaneously realized, the drilling machine has high integration, the uninterrupted and synchronous drilling and excavation are realized, the construction process is reduced, the construction cost is saved, and the grooving construction efficiency is improved.

[0103] Embodiment 2: The embodiment specifically relates to a self-locking ground wall one-side circular rotary drilling and excavation and then transverse drilling and grooving method, as shown in Figure 19 The grooving method is used to excavate a self-locking counter-pressure ground wall groove in the embodiment, the self-locking counter-pressure ground wall groove includes four vertical ground wall grooves c1 arranged outside the deep foundation pit and a horizontal cantilever plate groove c4 arranged outside the vertical ground wall grooves c1 and connected with the vertical ground wall grooves c1, and a rectangular structure is formed between the four vertical ground wall grooves c1. The construction method of the self-locking counter-pressure ground wall groove is the same as the construction method of the self-locking counter-pressure ground wall groove shown in Figure 17 The top surface of the rectangular horizontal cantilever plate groove c4 is flat with the bottom surface of the deep foundation pit, and thus is not described here.

[0104] Embodiment 3: This embodiment is particularly related to a self-locking diaphragm wall single-side circulation rotary drilling and post-drilling trenching method, as shown in Figure 20 This embodiment, the trenching method is used for excavating a self-locking positive pressure diaphragm wall trench, which includes four vertical diaphragm wall trenches c1 arranged outside the deep foundation pit and horizontal cantilever plate trenches c4 arranged inside the vertical diaphragm wall trenches c1 and communicated with the vertical diaphragm wall trenches c1, wherein the four vertical diaphragm wall trenches c1 form a rectangular structure. The construction method of the self-locking positive pressure diaphragm wall trench is the same as that of the self-locking negative pressure diaphragm wall trench shown in Figure 17 , and as shown in Figure 21 , the top surface of the rectangular horizontal cantilever plate trench c4 is flush with the bottom surface of the deep foundation pit, so it is not described here.

[0105] Although the above embodiments have been described in detail with reference to the accompanying drawings for the purpose of illustrating the concepts and embodiments of the present application, those skilled in the art can recognize that various improvements and changes can be made to the present application without departing from the scope defined by the claims, and therefore, they are not described here.

Claims

1. A method of self-locking diaphragm wall single-side circulation rotary drilling and post-lateral excavation trenching, for the drilling of a diaphragm wall trench, characterized in that The diaphragm wall trench comprises four vertical diaphragm wall trenches arranged outside the deep foundation pit and horizontal cantilever plate trenches arranged at the side of the vertical diaphragm wall trenches and communicated with the vertical diaphragm wall trenches, and the trench forming method comprises the following steps: S1: sequentially arranging a sludge treatment mechanism, a horizontal rotary drilling assembly and a vertical drilling device on a drilling rig from top to bottom; wherein: The horizontal rotary drilling assembly comprises a horizontal rotary drilling device, a rotary power assembly for driving the horizontal rotary drilling device to move, and a horizontal rotary drilling steel frame for mounting the horizontal rotary drilling device and the rotary power assembly; the rotary power assembly comprises a rotary motor and a counterforce arm hydraulic cylinder, both ends of a rotary motor shaft of the rotary motor are fixedly connected to the horizontal rotary drilling device and rotationally connected to the horizontal rotary drilling steel frame, the rotary motor drives the rotary motor shaft to rotate to drive the horizontal rotary drilling device to rotate, the counterforce arm hydraulic cylinder is connected to the rotary motor through a top rod and fixed to the horizontal rotary drilling steel frame through a base, and the counterforce arm hydraulic cylinder drives the top rod to extend and retract to drive the horizontal rotary drilling device to move horizontally; the horizontal rotary drilling steel frame is in a box-shaped structure with one side open; The vertical drilling device comprises a plurality of cylindrical drilling assemblies arranged horizontally and forming a rectangular excavation surface; S2: making the horizontal rotary drilling device located in the box-shaped space of the horizontal rotary drilling steel frame, controlling the vertical drilling device to vertically drill down the soil body until the design depth of the horizontal cantilever plate to form a free section of the vertical diaphragm wall trench; S3: making the vertical drilling device stop drilling, controlling the rotary motor of the rotary power assembly to drive the horizontal rotary drilling device to rotate outward on the horizontal plane to form the 1 / 4 circular horizontal cantilever plate trench; S4: making the horizontal rotary drilling device rotate back to the horizontal rotary drilling steel frame and stop working, and continuing to control the vertical drilling device to vertically drill down the soil body to the design depth of the vertical diaphragm wall trench to form an embedded section of the vertical diaphragm wall trench; S5: repeating steps S2-S4 until the drilling of the four vertical diaphragm wall trenches and the corresponding 1 / 4 circular horizontal cantilever plate trenches is completed; S6: controlling the rotary motor of the rotary power assembly to drive the horizontal rotary drilling device to rotate outward on the horizontal plane, and using the counterforce arm hydraulic cylinder of the rotary power assembly to drive the horizontal rotary drilling device to drill the soil body on the side of the horizontal rotary drilling steel frame or move the horizontal rotary drilling assembly along the length direction of the vertical diaphragm wall trench to form the rectangular horizontal cantilever plate trench, thereby realizing the drilling of the diaphragm wall trench.

2. A method of self-locking diaphragm wall single-side circulation rotary drilling and post-lateral excavation trenching according to claim 1, characterized in that In step S1, the sludge treatment mechanism comprises a stirring device, a crushing device, a sludge suction system, a sludge discharge system and a grouting system. The stirring device comprises a stirring box and a stirring mechanism; the stirring box is provided with a slag suction port, a slag discharge port and a slurry inlet; the stirring mechanism comprises a main gear and a plurality of auxiliary gears in transmission with the main gear; the main gear is driven by a stirring motor; a stirring main shaft extending into the stirring box is coaxially arranged on the main gear; stirring blades are arranged on the stirring main shaft; an auxiliary stirring shaft extending into the stirring box is coaxially arranged on the auxiliary gear; stirring blades are arranged on the auxiliary stirring shaft. The slag suction system comprises a main slag suction pipe and vertical and horizontal rotary slag suction branch pipes branched from a suction port of the main slag suction pipe; the slag suction port of the stirring box is connected with the main slag suction pipe; the main slag suction pipe and the slag suction port are provided with the crushing device therebetween; the crushing device comprises a fan for suction and crushing blades for crushing mud and slag; suction heads of the vertical and horizontal rotary slag suction branch pipes are connected to the vertical drilling device and the horizontal rotary drilling assembly respectively; suction valves are arranged at the suction heads; the pipe body of the horizontal rotary slag suction branch pipe is a telescopic pipe. The slurry injection system comprises a slurry injection pipe and a slurry injection pump arranged on the slurry injection pipe; one end of the slurry injection pipe is connected in communication with the slurry inlet of the stirring box to pump mud slurry into the stirring box. The slag discharge system comprises a slag discharge pipe and a slag discharge pump arranged on the slag discharge pipe; one end of the slag discharge pipe is connected in communication with the slag discharge port of the stirring box to pump mud and slag in the stirring box to the ground for collection. A pipe fixing rack is arranged above the stirring box; the main slag suction pipe, the slag discharge pipe and the slurry injection pipe are arranged along the pipe fixing rack.

3. A method of self-locking diaphragm wall single-side circulation rotary drilling and post-lateral excavation trenching according to claim 1, characterized in that In step S1, the vertical drilling device comprises a vertical drilling U-shaped fork plate and a plurality of cylindrical drilling assemblies mounted on the vertical drilling U-shaped fork plate; the vertical drilling U-shaped fork plate comprises a vertical drilling web plate, vertical drilling wing plates arranged on both sides of the vertical drilling web plate and vertical drilling steel supports welded perpendicularly on the vertical drilling web plate; the cylindrical drilling assembly comprises two cylinders, a plurality of stirring blade assemblies uniformly arranged on the surface of the cylinders and a motor driving the rotation of the cylinders; the stirring blade assembly comprises a stirring blade base and a stirring blade obliquely fixed on the stirring blade base; the rotating shaft of the motor penetrates through both cylinders and is correspondingly arranged in the rotating shaft hole of the vertical drilling wing plate.

4. A self-locking diaphragm wall one-side circulation rotary drilling and post- drilling trenching method according to claim 2, characterized in that In step S1, the horizontal rotary drilling device comprises a horizontal rotary drilling U-shaped fork plate and a plurality of vertically arranged horizontal rotary drills mounted on the horizontal rotary drilling U-shaped fork plate, the horizontal rotary drills comprising a first horizontal rotary drill and a second horizontal rotary drill respectively located on both sides of the horizontal rotary drilling device, a rectangular excavation surface being formed between the first horizontal rotary drills and between the second horizontal rotary drills, the horizontal rotary drilling U-shaped fork plate being composed of two oppositely arranged horizontal rotary drill web plates, a baffle plate connected to the same side of the two horizontal rotary drill web plates, horizontal rotary drill wing plates arranged at both ends of the horizontal rotary drill web plates, a horizontal rotary drill side vertical plate arranged on one side of the horizontal rotary drill web plate, and horizontal rotary drill steel support plates vertically welded on the horizontal rotary drill web plates; The horizontal rotary drilling steel frame is composed of a horizontal rotary drilling side vertical guard plate, a horizontal rotary drilling upper side guard plate, a horizontal rotary drilling lower side guard plate, a horizontal rotary drilling left side vertical guard plate, and a horizontal rotary drilling right side vertical guard plate, the horizontal rotary drilling device and the rotary power assembly being located in the box-shaped space of the horizontal rotary drilling steel frame; a rotary motor slide is formed on each of the horizontal rotary drilling upper side guard plate and the horizontal rotary drilling lower side guard plate, the two rotary motor slides being oppositely arranged, the rotary motor shafts of the rotary motors being respectively mounted in the two rotary motor slides, and the counter-force arm hydraulic cylinder driving the top rod to extend and retract to drive the rotary motor shafts to move along the length direction of the rotary motor slides.

5. A self-locking diaphragm wall one-side circulation rotary drilling and post- excavation horizontal drilling and trenching method according to claim 1, characterized in that In step S1, the drilling rig is hoisted by a cable of a hoisting assembly, the hoisting assembly comprising a vehicle-mounted platform, a steel stand, a pull rod, a hinge shaft, a guide rail, a sliding block, a steel suspension beam, a hoist motor, and a cable support, the steel stand being vertically arranged on the vehicle-mounted platform, the upper end of the pull rod being hingedly connected to the upper end of the steel stand and the lower end being hingedly connected to the hinge shaft fixed on the vehicle-mounted platform, the guide rail being vertically arranged and fixed along the steel stand, the sliding block being slidably assembled on the guide rail, the steel suspension beam being fixed on the sliding block, the hoist motor being fixed on the steel suspension beam, and the cable support being fixed below the steel suspension beam, the hoist motor driving the cable to move up and down in the vertical direction.

6. A self-locking diaphragm wall one-side circulation rotary drilling and post- drilling trenching method according to claim 4, characterized in that In steps S2 and S4, during the process of vertically downward drilling of the vertical drilling device, all the suction head suction valves of the horizontal rotary suction branch pipes are closed, and the suction head suction valves of the vertical suction branch pipes are opened to suck the crushed sludge of the vertical drilling device into the crushing device, the crushed sludge is crushed again by the crushing device and then sent into the mixing box for mixing, and the grouting system pumps the slurry into the mixing box in real time to mix with the sludge; the sludge and slurry mixture in the mixing box is pumped out by the sludge discharge system to the ground for collection and treatment in real time. In step S3, the rotating power assembly drives the horizontal rotary drilling device to rotate and drill the 1 / 4 circular horizontal cantilever plate groove in the horizontal plane, closes the suction valve at the suction head of the vertical suction residue branch pipe, opens the suction valve at the suction head of the horizontal rotary suction residue branch pipe corresponding to the first horizontal rotary drill, and sucks the broken residue of the horizontal rotary drilling device into the crushing device, the crushing device crushes the sucked residue again and sends it into the mixing box for mixing, the grouting system pumps the slurry into the mixing box in real time to mix with the residue, and the residue discharge system discharges the mixture of residue and slurry in the mixing box to the ground in real time for collection and treatment. In step S6, the rotating power assembly drives the horizontal rotary drilling device to drill the rectangular horizontal cantilever plate groove on the side of the horizontal rotary drilling steel frame in the horizontal plane, closes the suction valve at the suction head of the vertical suction residue branch pipe, and opens the suction valve at the suction head of the horizontal rotary suction residue branch pipe corresponding to the second horizontal rotary drill on any horizontal rotary drilling device, and sucks the broken residue of the horizontal rotary drilling device into the crushing device, the crushing device crushes the sucked residue again and sends it into the mixing box for mixing, the grouting system pumps the slurry into the mixing box in real time to mix with the residue, and the residue discharge system discharges the mixture of residue and slurry in the mixing box to the ground in real time for collection and treatment.

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