A method for excavating a trench by rotating and digging from both sides of a diaphragm wall

Abstract

The application discloses a self-locking wall-connecting double-side circulation rotary drilling and post-lateral excavation trench forming method, which comprises the following steps: setting a pipeline fixing frame, 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 excavate the soil to form a vertical wall-connecting wall trench free section; controlling the rotary power assembly to drive the horizontal rotary drilling device to outward rotate and excavate the soil on a horizontal plane to form a semicircular horizontal cantilever plate trench; continuing to control the vertical drilling device to vertically downward drill and excavate the soil to form a vertical wall-connecting wall trench embedded section; completing the drilling and excavation of one vertical wall-connecting wall trench and corresponding semicircular horizontal cantilever plate trenches; horizontally and laterally drilling and excavating the semicircular horizontal cantilever plate trench by using any horizontal rotary drilling device in the horizontal rotary drilling assembly to form a rectangular horizontal cantilever plate trench; and completing the drilling and excavation of the remaining three vertical wall-connecting wall trenches and corresponding rectangular horizontal cantilever plate trenches, so that the drilling and excavation 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 double-side circulating rotary drilling and post-lateral 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 placing the reinforcement cage after cleaning the trench and hoisting. 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 excavates 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, pumping modules, winding 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 between 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 stability of the trench hole. Patent No. CN 216108696 U "Truss chain milling earth stirring diaphragm wall machine" and patent No. CN 115897551 A "Continuous wall construction equipment and construction method based on TRD method drilling machine" both set the chain with multiple milling and stirring heads uniformly on the truss with active and passive drive mechanisms at both ends. The active drive mechanism drives the chain with milling and stirring heads to drill and excavate the diaphragm wall trench hole.

[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 drilling of the hole guide in one construction unit is completed, the rock between the adjacent hole guides of the construction unit is milled, while the hole guide of another construction unit is drilled, 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 slotting machine to mill the slot. When milling, the two rollers rotate at low speed in opposite directions, the milling teeth break and crush the rock stratum, and the rock debris and mud pumped out by the milling wheel are discharged to the ground mud station. This 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 by the rotary drilling and grab bucket combined cycle.

[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 slag, such as the excavator, which needs to be continuously lifted up and down in the slot to excavate and discharge the soil, and the construction efficiency is low; (2) The existing slotting machine and slotting method mainly aim at the vertical continuous wall slotting construction method, and cannot realize the excavation of the horizontal continuous wall / plate structure slot in the 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 double-side rotary drilling and horizontal excavation slotting method according to the deficiencies of the existing technology. The slotting method sequentially arranges a mud and slag 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 excavating 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 double-side horizontal rotary drilling device is driven by a rotary motor to drill and excavate a semicircular horizontal cantilever plate slot in the soil body, and rotates back after completion; then the vertical drilling device is started again to continue excavating the vertical wall slot to the design depth, and the drilling and excavation are repeated to form a self-locking continuous wall slot with a semicircular horizontal cantilever; finally, the semicircular horizontal cantilever plate slot array is horizontally drilled by any one side of the horizontal rotary drilling device, realizing the drilling and excavation of the continuous wall slot with a rectangular horizontal cantilever plate in the soil body.

[0007] The technical scheme of the present application is realized by the following technical scheme:

[0008] A self-locking wall-continuous wall double-side circulation rotary drilling and post-lateral excavation trench forming method is used for drilling and excavating a wall-continuous wall trench, characterized in that the wall-continuous wall trench comprises four vertical wall-continuous wall trenches arranged outside a deep foundation pit and horizontal cantilever plate trenches arranged at the side of the vertical wall-continuous wall trenches and communicated with the vertical wall-continuous wall trenches, and the trench forming method comprises 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 two oppositely arranged horizontal rotary drilling devices, two rotary power assemblies respectively used for driving the two horizontal rotary drilling devices to rotate, and a horizontal rotary drilling steel frame used for mounting the two horizontal rotary drilling devices and the two rotary power assemblies; 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 downward into the soil until the design depth of the horizontal cantilever plate, so as to form a free section of the vertical wall-continuous wall trench;

[0013] S3: making the vertical drilling device stop drilling, controlling the rotary power assembly to drive the horizontal rotary drilling device to rotate outward in the horizontal plane to drill into the soil, so as to form a semicircular horizontal cantilever plate trench;

[0014] S4: making the horizontal rotary drilling device return to the initial state and stop working, and continuing to control the vertical drilling device to vertically drill downward into the soil until the design depth of the vertical wall-continuous wall trench, so as to form an embedded section of the vertical wall-continuous wall trench;

[0015] S5: repeating steps S2-S4 until the drilling of one vertical wall-continuous wall trench and its corresponding semicircular horizontal cantilever plate trenches is completed, and using any horizontal rotary drilling device in the horizontal rotary drilling assembly to horizontally and laterally drill into the semicircular horizontal cantilever plate trench, so as to form a rectangular horizontal cantilever plate trench;

[0016] S6: according to step S5, completing the drilling of the remaining three vertical wall-continuous wall trenches and their corresponding rectangular horizontal cantilever plate trenches, so as to realize the drilling of the wall-continuous wall trench.

[0017] In step S1, the drilling machine is hoisted by a cable of a hoisting assembly, the hoisting assembly comprising a vehicle-mounted platform, a steel stand column, a pull rod, a hinge shaft, a guide rail, a sliding block, a steel suspension beam, a hoisting motor and a cable support, the steel stand column being vertically arranged on the vehicle-mounted platform, the upper end of the pull rod being hingedly connected with the upper end of the steel stand column and the lower end being hingedly connected with the hinge shaft fixed on the vehicle-mounted platform, the guide rail being vertically arranged and fixed along the steel stand column, the sliding block being slidably arranged on the guide rail, the steel suspension beam being fixed on the sliding block, the hoisting motor being fixed on the steel suspension beam, and the cable support being fixed below the steel suspension beam, the hoisting motor driving the cable to move up and down in the vertical direction.

[0018] 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.

[0019] The stirring device comprises a stirring box and a stirring mechanism, the stirring box being provided with a sludge suction port, a sludge discharge port and a grout inlet port, the stirring mechanism comprising a main gear and a plurality of auxiliary gears in transmission with the main gear, the main gear being driven by a stirring motor, the main gear being coaxially provided with a stirring main shaft extending into the stirring box, the stirring main shaft being provided with stirring blades, the auxiliary gears being coaxially provided with stirring auxiliary shafts extending into the stirring box, the stirring auxiliary shafts being provided with stirring blades.

[0020] The sludge suction system comprises a sludge suction main pipe and vertical sludge suction branch pipes and horizontal rotary sludge suction branch pipes branched from a suction port of the sludge suction main pipe, the sludge suction port of the stirring box being connected with the sludge suction main pipe, and the sludge suction main pipe and the sludge suction port being provided with the crushing device therebetween, the crushing device comprising a fan for suction and crushing blades for crushing sludge, the suction heads of the vertical sludge suction branch pipes being connected into the vertical drilling device, the suction heads of the horizontal rotary sludge suction branch pipes being connected into the horizontal rotary drilling assembly, the suction heads being provided with sludge valves, and the pipe body of the horizontal rotary sludge suction branch pipes being a telescopic pipe.

[0021] The grouting system comprises a grouting pipe and a grouting pump arranged on the grouting pipe, one end of the grouting pipe being in communication with the grout inlet port of the stirring box to pump slurry into the stirring box.

[0022] 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 being in communication with the sludge discharge port of the stirring box to pump sludge in the stirring box to the ground for collection.

[0023] The upper portion of the stirring box is provided with a pipe fixing frame, the sludge suction main pipe, the sludge discharge pipe and the grouting pipe being arranged along the pipe fixing frame.

[0024] 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 supports welded 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 cylinder, and a motor for driving the cylinder to rotate, 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.

[0025] In step S1, the horizontal rotary drilling device comprises a horizontal rotary drilling U-shaped fork plate and a plurality of vertical horizontal rotary drills installed on the horizontal rotary drilling U-shaped fork plate, the horizontal rotary drilling U-shaped fork plate is composed of a horizontal rotary drilling web plate, 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 supports vertically welded on the horizontal rotary drilling web plate;

[0026] 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;

[0027] The rotary power assembly comprises a rotary motor and a counterforce frame connected with the rotary motor, the rotating shaft of the rotary motor penetrates through the horizontal rotary drilling U-shaped fork plate of the horizontal rotary drilling device and is connected with the horizontal rotary drilling steel frame, wherein the rotating shaft of the rotary motor is fixedly connected with the horizontal rotary drilling U-shaped fork plate of the horizontal rotary drilling device, and the rotating shaft of the rotary motor is rotatably connected with the horizontal rotary drilling steel frame, and the counterforce frame comprises a counterforce arm connected with the rotary motor and a counterforce plate connected with the counterforce arm and fixed on the horizontal rotary drilling steel frame.

[0028] In steps S2 and S4, during the process that the vertical drilling device vertically drills the soil body downward, the suction head of the horizontal rotary suction branch pipe is closed, and the suction head of the vertical suction branch pipe is opened to suck the crushed sludge of the vertical drilling device into the crushing device, the crushing device crushes the sucked sludge again and sends it 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 to the ground for collection and treatment in real time by the sludge discharge system.

[0029] In step S3, the rotating power assembly drives the horizontal rotating drilling device to rotate outward to drill the horizontal cantilever plate slot in the horizontal plane, the suction head of the vertical suction residue branch pipe is closed, the suction residue valve at the suction head of the horizontal rotating residue branch pipe is opened to suck the broken residue of the horizontal rotating drilling device into the crushing device, the broken residue is crushed again 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 residue; the residue discharge system discharges the mixture of residue and slurry in the mixing box to the ground for collection and treatment in real time.

[0030] The advantages of the present application are:

[0031] (1) The cable, vertical cylindrical drill and horizontally rotatable cylindrical drill with stirring blades are used to realize the drilling of the ground wall slot with the horizontal cantilever plate structure in the soil body;

[0032] (2) The horizontal cantilever plate structure and the vertical wall body can be once grooved without other mechanical assistance, so that the construction efficiency is improved and the construction and equipment costs are saved;

[0033] (3) The horizontal rotating drill is used to drill a semicircular horizontal cantilever plate slot array first, and then the rectangular horizontal cantilever plate slot is transversely excavated at one time, so that the grooving construction efficiency is improved;

[0034] (4) The vacuum residue suction and slurry combined residue discharge are used to improve the construction environment and save the slurry cost;

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

[0036] (6) The drilling and residue discharge functions are simultaneously provided, the drilling machine has high integration degree, the uninterrupted and synchronous drilling and residue 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 view of embodiment 1 of the present application;

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

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

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

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

[0042] Figure 6 is Figure 5 a cross-sectional view along the line B-B in Fig. 1;

[0043] Figure 7 is Figure 3 a cross-sectional view along the line C-C in Fig. 1;

[0044] Figure 8 is Figure 3 a cross-sectional view along the line D-D in Fig. 1;

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

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

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

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

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

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

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

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

[0053] Figure 17 is a schematic diagram of a construction process flow of a wall slot of a bored pile self-locking earth retaining wall according to Embodiment 1 of the present application;

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

[0055] Figure 19 is a schematic diagram of a construction process flow of a wall slot of a bored pile self-locking earth retaining wall according to 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 pile self-locking earth retaining wall according to Embodiment 3 of the present application;

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

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

[0059] 1. Vertical drilling device, 2. Horizontal rotary drilling assembly, 3. Agitation device, 4. Crushing device, 5. Slag suction system, 6. Grouting system, 7. Slag discharge system, 8. Pipeline fixing frame, 9. Hoisting assembly;

[0060] 11. Cylindrical drilling assembly, 12. Vertical drilling U-shaped fork plate, 111. Cylinder, 112. Stirring knife assembly, 113. Motor, 114. Motor shaft, 121. Vertical drilling wing plate, 122. Vertical drilling web plate, 123. Vertical drilling steel support, 124. Shaft hole, 125. Vertical suction pipe through hole, 1121. Stirring knife base, 1122. Stirring knife;

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

[0062] 211. Horizontal rotary drilling U-shaped fork plate, 2111. Horizontal rotary drilling wing plate, 2112. Horizontal rotary drilling web plate, 2113. Horizontal rotary drilling side vertical plate, 2114. Horizontal rotary drilling steel support, 2115. Horizontal rotary drilling suction pipe through hole, 2116. Rotary motor shaft fixing hole;

[0063] 221. Rotary motor, 222. Rotary motor shaft, 223. Fastener, 224. Counterforce frame, 2241. Counterforce plate, 2242. Counterforce arm;

[0064] 231. Horizontal rotary drilling side vertical guard plate, 232. Horizontal rotary drilling upper side guard plate, 233. Horizontal rotary drilling lower side guard plate, 234. Horizontal rotary drilling left side vertical guard plate, 235. Horizontal rotary drilling right side vertical guard plate, 236. Rotary motor positioning hole, 237. Horizontal rotary suction main pipe through hole;

[0065] 31. Agitation box, 32. Double-layer large blade, 33. Agitation main shaft, 34. Double-layer small blade, 35. Agitation auxiliary 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. Agitation 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. Suction main pipe, 52. Vertical suction branch pipe, 53. Horizontal rotary suction branch pipe, 54. Telescopic pipe, 55. Suction head, 56. Vertical suction valve, 57. Horizontal rotary 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 upright 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. Detailed 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 horizontal trenching after bilateral cyclic rotary drilling for self-locking diaphragm walls. 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 vertical diaphragms) located on the outer perimeter of the deep foundation pit, and a horizontal cantilever slab trench c4 (used for constructing horizontal cantilever slabs) 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 horizontal cantilevered slab trench drilling, which mainly comprises two oppositely arranged horizontal rotary drilling devices 21, two rotary power assemblies 22 respectively used for driving the two horizontal rotary drilling devices 21 to rotate, and a horizontal rotary drilling steel frame 23 used for mounting the two horizontal rotary drilling devices 21 and the two rotary power assemblies 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. The horizontal rotary drills are vertically arranged and arranged in a matrix. Except for the different arrangement manner (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 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 a horizontal rotary drilling web plate 2112, horizontal rotary drilling wing plates 2111 arranged at both ends (upper and lower) of the horizontal rotary drilling web plate 2112, a horizontal rotary drilling side stand plate 2113 arranged at one side of the horizontal rotary drilling web plate 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 plate 2112. The horizontal rotary drilling side stand plate 2113 is used for separating the horizontal rotary drills and the rotary power assemblies 22. In addition, a plurality of horizontal rotary drilling sludge suction branch pipe through holes 2115 are arranged on the horizontal rotary drilling web plate 2112, so that the suction heads 55 of the horizontal rotary sludge suction branch pipes 53 in the sludge 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 opening, which is composed of a horizontal rotary drilling side stand plate 231, a horizontal rotary drilling upper side plate 232, a horizontal rotary drilling lower side plate 233, a horizontal rotary drilling left side stand plate 234, and a horizontal rotary drilling right side stand plate 235. 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. In addition, a horizontal rotary sludge suction main pipe through hole 237 is arranged on the horizontal rotary drilling upper side plate 232, so as to fix the sludge suction main pipe 51 of the sludge suction system 5.

[0080] The rotating power assembly 22 comprises a rotating motor 221 and a counterforce frame 224 connected with the rotating motor 221. The rotating motor shaft 222 of the rotating motor 221 penetrates the rotating motor shaft fixing hole 2116 of the upper horizontal rotating drill wing plate 2111 and enters the rotating motor positioning hole 236 of the upper horizontal rotating drill side plate 232. The lower end of the rotating motor shaft 222 of the rotating motor 221 penetrates the rotating motor shaft fixing hole 2116 of the lower horizontal rotating drill wing plate 2111 and enters the rotating motor positioning hole 236 of the lower horizontal rotating drill side plate 233. The rotating motor shaft 222 of the rotating motor 221 is fixedly connected to the horizontal rotating drill wing plate 2111 of the horizontal rotating drill U-shaped fork plate 211 by a fastener 223. The rotating motor shaft 222 of the rotating motor 221 is rotatably connected to the upper horizontal rotating drill side plate 232 (the lower horizontal rotating drill side plate 233) of the horizontal rotating drill steel frame 23. The counterforce frame 224 comprises a counterforce arm 2242 connected with the rotating motor 221 and a counterforce plate 2241 connected with the counterforce arm 2242 and fixed on the lower horizontal rotating drill side plate 233. In this embodiment, the rotating motor 221 drives the rotating motor shaft 222 to rotate, so as to drive the corresponding horizontal rotating drill device 21 to rotate by 90 degrees on the horizontal plane, thereby forming a 1 / 4 circular horizontal cantilever plate groove. Two horizontal rotating drill devices 21 can drill and excavate the soil to form a semicircular horizontal cantilever plate groove.

[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 upper horizontal rotating drill side plate 232. The stirring mechanism comprises a main gear 37 and a plurality of auxiliary gears 39 in transmission with 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 each auxiliary gear 39 to rotate. The main gear 37 is coaxially provided with a stirring main rotating shaft 33 extending into the stirring box 31. The stirring main rotating shaft 33 is provided with stirring blades. The stirring blades herein adopt double-layer large blades 32. Each auxiliary gear 39 is coaxially provided with a stirring auxiliary rotating shaft 35 extending into the stirring box 31. The stirring auxiliary rotating shaft 35 is also provided with stirring blades. The stirring blades on part of the stirring auxiliary rotating shafts 35 adopt double-layer small blades 34. The stirring blades on another part of the stirring auxiliary rotating shafts 35 adopt 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. Figure 2As shown in the figure, the top of the gear box where the main gear 37 and the auxiliary gear 39 are located is a steel cover plate 311, which is used to connect with the pipe fixing frame 8. The stirring tank 31 is provided with a sludge suction port, a sludge discharge port and a slurry inlet port.

[0083] The sludge suction port of the stirring tank 31 is connected with a sludge suction system 5, which mainly includes a sludge suction main pipe 51, a vertical sludge suction branch pipe 52, a horizontal rotary sludge suction branch pipe 53 and a crushing device 4. One end of the sludge suction main pipe 51 is connected with the sludge suction port of the stirring tank 31 through the crushing device 4, and 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 the figure. Figure 2 As shown in the figure, 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 drill assembly 11, so that it can suck the soil sludge cut and stirred, and a 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 drill assembly 2, and the suction head 55 of the horizontal rotary sludge suction branch pipe 53 is close to the horizontal rotary drill device 21, so that it can suck the soil sludge cut and stirred, and a horizontal rotary sludge suction valve 57 is arranged at the suction head 55 for controlling the opening and closing of the pipeline. In order to adapt to the rotation of the horizontal rotary drill device 21, part of the pipeline of the horizontal rotary sludge suction branch pipe 53 is in the form of an extension pipe 54. The sucked sludge enters the stirring tank 31 after being crushed into small particles by the crushing device 4. The crushing device 4 mainly includes a crushing tank 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 inclinedly arranged in the crushing tank 41 to form a slope for the flow of sludge. The fan motor 45 is installed on the top plate in the crushing tank 41 through the rack 44. 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 suction main pipe 51. 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 stirring tank 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 stirring tank 31 from the fan motor 45.

[0084] The slurry inlet port of the stirring tank 31 is connected with the grouting system 6 from 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 suitable concentration into the stirring tank 31 through the grouting pump 62, so as to mix with the sludge sucked up, so as to become a liquid, which is convenient for sucking out.

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

[0086] As shown in Figures 1-3 The pipe fixing frame 8 is in a box-shaped structure, including a top steel plate 81, a middle steel plate 82, a bottom steel plate 83, and a plurality of side plates 84 connecting the three. In addition, a square through hole 85 is formed in the bottom steel plate 83 for the stirring motor 312 to pass through. In addition, a discharge pipe fixing hole 86 for the discharge pipe 71 to pass through and a grouting pipe fixing hole 87 for the grouting pipe 61 to pass through are formed in the top steel plate 81, the middle steel plate 82, and the bottom steel plate 83. In order to avoid pipe shaking during drilling, the pipe fixing frame 8 can provide fixation for each passing pipe. It should be noted that four lifting points are provided on the top steel plate 81 for connecting the cable 93 and ensuring stable lifting of the pipe fixing frame 8.

[0087] As shown in Figure 17 Before drilling downward, the horizontal rotary drilling device 21 is located in the box-shaped space of the horizontal rotary drilling steel frame 23. Then, the vertical drilling device 1 is controlled to drill vertically downward into the soil layer a until the designed depth of the horizontal cantilever plate, to form the free section of the vertical ground connecting wall slot c2 of the vertical ground connecting wall slot c1;

[0088] During this downward drilling process, the horizontal rotary suction valve 57 at the suction head 55 of the horizontal rotary suction branch pipe 53 is closed, and the vertical suction valve 56 at the suction head 55 of the vertical suction branch pipe 52 is opened to suck the crushed slurry of the vertical drilling device 1 into the crushing device 4. The crushing device 4 crushes the sucked slurry again and sends it into the stirring box 31 for stirring. The grouting system 6 pumps the slurry into the stirring box 31 in real time to mix with the slurry. The discharge system 7 discharges the slurry and slurry mixture in the stirring box 31 to the ground for collection and treatment in real time.

[0089] As shown in Figure 17 The vertical drilling device 1 is stopped and kept at this depth, and the horizontal rotary drilling assembly 2 is opened. The two rotary power assemblies 22 drive the corresponding horizontal rotary drilling devices 21 to rotate 90 degrees outward from the horizontal rotary drilling steel frame 23 to drill the soil layer a in the horizontal plane, forming a semicircular horizontal cantilever plate slot c4.

[0090] During this horizontal drilling process, the vertical slag suction valve 56 at the suction head 55 of the vertical slag suction branch pipe 52 is closed, and the horizontal rotary slag suction valve 57 at the suction head 55 of the horizontal rotary slag suction branch pipe 53 is opened to suck the crushed mud from the horizontal rotary drilling device 21 into the crushing device 4. The crushing device 4 then 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 mixture of mud and mud from the mixing tank 31 to the ground for collection and treatment in real time.

[0091] (S4) For example Figure 17 As shown, after drilling the semi-circular horizontal cantilever plate groove c4, the rotary power component 22 drives the horizontal rotary drilling device 21 to rotate back 90 degrees and retract into the horizontal rotary drilling steel frame 23; then the vertical drilling device 1 continues to drill to the design depth, forming the embedded section of the vertical diaphragm wall groove c1, the diaphragm wall groove c3.

[0092] During this downward drilling process, the horizontal rotary slag suction valve 57 at the suction head 55 of the 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 then 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 mixture of mud and mud from the mixing tank 31 to the ground for collection and treatment in real time.

[0093] (S5) For example Figure 17 As shown, repeat steps S2-S4 until the drilling of a vertical diaphragm wall groove c1 and its corresponding semi-circular horizontal cantilever plate grooves c4 is completed. Use any one of the horizontal rotary drilling devices 21 in the horizontal rotary drilling assembly 2 to perform horizontal drilling of the semi-circular horizontal cantilever plate grooves c4. That is, rotate one of the horizontal rotary drilling devices 21 90 degrees outward from the horizontal rotary drilling steel frame 23 on the horizontal plane, and then move the horizontal rotary drilling device 21 along the length direction of the horizontal cantilever plate to drill the semi-circular horizontal cantilever plate grooves c4 to form rectangular horizontal cantilever plate grooves c4.

[0094] (S6) Following step S5, complete the drilling of the remaining three vertical diaphragm wall grooves c1 and their corresponding rectangular horizontal cantilever slab grooves c4, thereby achieving the drilling of the diaphragm wall grooves c. Furthermore, as... Figure 18 As shown, the top surface of the rectangular horizontal cantilever slab groove c4 is level with the bottom surface of the deep foundation pit.

[0095] The beneficial effects of this embodiment are:

[0096] (1) By using a cable, a vertical cylindrical drill and a horizontally rotating cylindrical drill with a stirring cutter, the trench of the diaphragm wall with a horizontal cantilever plate structure is drilled and excavated in the soil.

[0097] (2) Both the horizontal cantilever slab structure and the vertical wall can be grooved in one go without the need for other mechanical assistance, thereby improving construction efficiency and saving construction and equipment costs;

[0098] (3) By first drilling a semi-circular horizontal cantilever slab trench array using a horizontal rotary drill, and then excavating a rectangular horizontal cantilever slab trench in one go, the efficiency of trenching construction can be improved.

[0099] (4) Improve the construction environment and save mud costs by combining vacuum slag suction and mud discharge;

[0100] (5) The soil is crushed twice by the crushing box, which can better discharge the slag from the slot and prevent the slag discharge pipe from being blocked.

[0101] (6) It has both drilling and slag removal functions, and the drilling rig has a high degree of integration, which realizes the uninterrupted synchronous drilling and slag removal, reduces construction procedures, saves construction costs, and improves trenching construction efficiency.

[0102] Example 2: This example specifically relates to a method for creating a trench by horizontal excavation after double-sided cyclic rotary drilling of a self-locking diaphragm wall, such as... Figure 19 As shown, in this embodiment, the trenching method is used to excavate another type of self-locking counter-pressure diaphragm wall trench. This self-locking counter-pressure diaphragm wall trench includes four vertical diaphragm wall trenches c1 (for constructing the vertical diaphragm wall) located on the outer perimeter of the deep foundation pit, and a horizontal cantilever slab trench c4 (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. The trenching method for this self-locking counter-pressure diaphragm wall trench is similar to... Figure 17 The method for forming the self-locking counter-pressure diaphragm wall trench shown is the same, and the top surface of the rectangular horizontal cantilever slab trench c4 is flush with the bottom surface of the deep foundation pit, so it will not be described again here.

[0103] Example 3: This example specifically relates to a method for creating a trench by horizontal excavation after double-sided cyclic rotary drilling of a self-locking diaphragm wall, such as... Figure 20 As shown, in this embodiment, the trenching method is used to excavate a self-locking positive pressure diaphragm wall trench. This self-locking positive pressure diaphragm wall trench includes four vertical diaphragm wall trenches c1 located on the outer perimeter of the deep foundation pit, and a horizontal cantilever slab trench c4 located inside and connected to the vertical diaphragm wall trenches c1. The four vertical diaphragm wall trenches c1 form a rectangular structure. The construction method of this self-locking positive pressure diaphragm wall trench is similar to... Figure 17 The construction method for the self-locking counter-pressure diaphragm wall groove shown is the same, and as... Figure 21As shown, the rectangular horizontal cantilever plate groove c4 top surface with deep foundation bottom surface, so here not to repeat.

[0104] Although the above embodiments have been described in detail with reference to the accompanying drawings, 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 are not described here.

Claims

1. A method of self-locking diaphragm wall double-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 machine from top to bottom; wherein: The horizontal rotary drilling assembly comprises two horizontally arranged horizontal rotary drilling devices, two rotary power assemblies for driving the two horizontal rotary drilling devices to rotate, and a horizontal rotary drilling steel frame for mounting the two horizontal rotary drilling devices and the two rotary power assemblies; the horizontal rotary drilling steel frame is a box-shaped structure with one side open; The vertical drilling device comprises a plurality of horizontally arranged cylindrical drilling assemblies 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 downward into the soil until the designed depth of the horizontal cantilever plate, so as to form a free section of the vertical diaphragm wall trench; S3: making the vertical drilling device stop drilling, controlling the rotary power assembly to drive the horizontal rotary drilling device to rotate outward on the horizontal plane to drill the soil, so as to form the semicircular horizontal cantilever plate trench; S4: making the horizontal rotary drilling device return to the initial state and stop working, and continuing to control the vertical drilling device to vertically drill downward into the soil until the designed 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 one vertical diaphragm wall trench and its corresponding semicircular horizontal cantilever plate trenches is completed, and using any horizontal rotary drilling device in the horizontal rotary drilling assembly to horizontally and transversely drill the semicircular horizontal cantilever plate trench to form a rectangular horizontal cantilever plate trench; S6: according to step S5, completing the drilling of the remaining three vertical diaphragm wall trenches and their corresponding rectangular horizontal cantilever plate trenches, thereby realizing the drilling of the diaphragm wall trench.

2. A method of self-locking diaphragm wall double-side circulation rotary drilling and post excavation trenching according to claim 1, characterized in that In step S1, the drilling machine is hoisted by a cable of a hoisting assembly, the hoisting assembly comprises a vehicle-mounted platform, a steel stand, a pull rod, a hinge shaft, a guide rail, a sliding block, a steel suspension beam, a winch motor and a cable support, the steel stand is vertically arranged on the vehicle-mounted platform, the upper end of the pull rod is hinged to the upper end of the steel stand and the lower end is hinged to the hinge shaft fixed on the vehicle-mounted platform, the guide rail is vertically arranged and fixed along the steel stand, the sliding block is slidably arranged on the guide rail, the steel suspension beam is fixed on the sliding block, the winch motor is fixed on the steel suspension beam, and the cable support is fixed below the steel suspension beam, and the winch motor drives the cable to move up and down in the vertical direction.

3. A method of self-locking diaphragm wall double-side circulation rotary drilling and post 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; the main gear is coaxially provided with a stirring main rotating shaft extending into the stirring box; the stirring main rotating shaft is provided with stirring blades; the auxiliary gears are coaxially provided with stirring auxiliary rotating shafts extending into the stirring box; the stirring auxiliary rotating shafts are provided with stirring blades; The slag suction system comprises a main slag suction pipe and vertical and horizontal rotary slag suction branch pipes branched from 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; the crushing device comprises a fan for suction and crushing knives for crushing mud; the suction heads of the vertical slag suction branch pipes are connected to the vertical drilling device; the suction heads of the horizontal rotary slag suction branch pipes are connected to the horizontal rotary drilling assembly; the suction heads are provided with slag valves; the pipe body of the horizontal rotary slag suction branch pipe adopts an extension 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 with the slurry inlet of the stirring box to pump the mud 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 with the slag discharge port of the stirring box to pump the mud in the stirring box to the ground for collection; The upper part of the stirring box is provided with a pipe fixing frame; the main slag suction pipe, the slag discharge pipe and the slurry injection pipe are arranged along the pipe fixing frame.

4. A self-locking diaphragm wall double-side circulation rotary drilling and post- excavation trenching method 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 installed 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 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 cylinder and a motor driving the rotation of the cylinder; the stirring knife assembly comprises a stirring knife base and a stirring knife obliquely fixed on the stirring knife base; the rotating shaft of the motor penetrates through both sides of the cylinder and is correspondingly arranged in the rotating shaft hole of the vertical drilling wing plate.

5. A self-locking diaphragm wall double-side circulation rotary drilling and post- excavation trenching method according to claim 1, characterized in that In step S1, the horizontal rotary drilling device comprises a horizontal rotary drilling U-shaped fork plate and a plurality of vertical horizontal rotary drills installed on the horizontal rotary drilling U-shaped fork plate; the horizontal rotary drilling U-shaped fork plate comprises a horizontal rotary drilling web plate, 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 supports vertically welded on the horizontal rotary drilling web plate; The horizontal rotary drilling steel frame is composed of a horizontal rotary drilling side upright guard plate, a horizontal rotary drilling upper side guard plate, a horizontal rotary drilling lower side guard plate, a horizontal rotary drilling left side upright guard plate and a horizontal rotary drilling right side upright guard 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. The rotary power assembly comprises a rotary motor and a counterforce frame connected with the rotary motor, both ends of a rotary motor shaft of the rotary motor pass through a horizontal rotary drilling U-shaped fork plate of the horizontal rotary drilling device to be connected with the horizontal rotary drilling steel frame, wherein the rotary motor shaft of the rotary motor is fixedly connected with the horizontal rotary drilling U-shaped fork plate of the horizontal rotary drilling device, and the rotary motor shaft of the rotary motor is rotatably connected with the horizontal rotary drilling steel frame, and the counterforce frame comprises a counterforce arm connected with the rotary motor and a counterforce plate connected with the counterforce arm and fixed on the horizontal rotary drilling steel frame.

6. A self-locking diaphragm wall double circulation rotary drilling and post- excavation trenching method according to claim 3, characterized in that In steps S2 and S4, during the process that the vertical drilling device vertically drills downward the earth body, the suction head of the horizontal rotary suction branch pipe is closed, and the suction head of the vertical suction branch pipe is opened to suck the crushed sludge of the vertical drilling device into the crushing device, the crushing device sends the sucked sludge into the mixing box for mixing after secondary crushing, the grouting system pumps the slurry into the mixing box for mixing with the sludge in real time, and the sludge and slurry mixture in the mixing box is pumped out to the ground for collection and treatment in real time by the sludge discharge system. In step S3, during the process that the rotary power assembly drives the horizontal rotary drilling device to rotate outward on the horizontal plane to drill the horizontal cantilever plate groove, the suction head of the vertical suction branch pipe is closed, and the suction head of the horizontal rotary suction branch pipe is opened to suck the crushed sludge of the horizontal rotary drilling device into the crushing device, the crushing device sends the sucked sludge into the mixing box for mixing after secondary crushing, the grouting system pumps the slurry into the mixing box for mixing with the sludge in real time, and the sludge and slurry mixture in the mixing box is pumped out to the ground for collection and treatment in real time by the sludge discharge system.

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