阅读说明：本技术 一种流沙层和黏土层沉井施工用抽砂排水设备及方法 (Sand pumping and drainage equipment and method for open caisson construction of quicksand layer and clay layer ) 是由 曹为民 胡小峰 项恒 曹银 李红涛 方晓瑞 崔炎锋 罗娟 雷鸣 王红梅 李瑞娟 于 2021-06-18 设计创作，主要内容包括：本发明公布了一种流沙层和黏土层沉井施工用抽砂排水设备即方法,包括井体,安装环、绞碎装置、抽泥装置、可调连接件、伸缩连接件和泥浆泵；绞碎装置包括转座和铰刀杆,抽泥装置包括连接筒、抽泥管和电机,可调连接件包括固定杆、调节杆和调节螺母,伸缩连接件包括相互套合滑动连接的套管和滑杆,本设备在使用的过程中,通过绞碎装置在刃脚的位置对土体进行绞碎,通过破碎刀片对绞碎装置不能绞碎的土体进行破碎,通过抽泥装置和泥浆泵将泥浆抽取到井体外,从而可以在流沙层和黏土层位置进行沉井的快速施工,且各种装置和结构件可以灵活的组装,从而便于在施工组装,而在施工完成后拆卸。(The invention discloses sand pumping and drainage equipment for open caisson construction of a quicksand layer and a clay layer, namely a method, which comprises a well body, a mounting ring, a mincing device, a mud pumping device, an adjustable connecting piece, a telescopic connecting piece and a mud pump, wherein the mounting ring is fixedly connected with the mounting ring; the device that rubs includes swivel mount and reamer pole, it includes the connecting cylinder to take out mud pipe and motor, adjustable connecting piece includes the dead lever, adjust pole and adjusting nut, telescopic connector is including the sleeve pipe and the slide bar of mutual registrate sliding connection, this equipment is at the in-process that uses, rub the device to rub the soil body in the position of sword foot through rubbing, it is broken to the soil body that the device can not rub of twisting through broken blade, extract outside the well body with mud through taking out mud device and slush pump, thereby can carry out the quick construction of open caisson at sand bed and clay layer position, and the equipment that various devices and structure can be nimble, thereby be convenient for at the construction equipment, and dismantle after the construction is accomplished.)

1. The utility model provides a sand pumping drainage equipment is used in construction of quicksand layer and clay layer open caisson, includes the well body (1), the bottom rigid coupling of the well body (1) has sword foot (11), and the inner wall lower part rigid coupling of the well body (1) has annular attachment strap (12), its characterized in that: the inner circumference of the integrated structure of the blade foot (11) and the well body (1) is uniformly provided with a water spraying pipeline (13), and the integrated structure further comprises a mounting ring (2), a mincing device (3), a mud pumping device (4), an adjustable connecting piece (5), a telescopic connecting piece (6) and a mud pump (7); the mounting ring (2) is arranged on the upper surface of the butt strap (12), and an annular rack (21) is fixedly connected to the inner ring of the mounting ring (2);

the mincing device (3) comprises a rotary seat (31) and a reamer rod (32); the rotary seat (31) is rotatably connected to the inner ring of the mounting ring (2) and is uniformly provided with a plurality of rotary seats around the circumference of the axis of the mounting ring (2), the reamer rod (32) is rotatably connected in the rotary seat (31), the top of the reamer rod (32) is fixedly connected with a gear (33) meshed with the rack (21), the circumference of the bottom of the reamer rod (32) is uniformly fixedly connected with a reamer blade (34), and the position of the reamer blade (34) corresponds to the position of the cutting edge (11);

the upper circumference of the mud pumping device (4) is uniformly and fixedly connected with the adjustable connecting piece (5), the other end of the adjustable connecting piece (5) is connected with the mounting ring (2), and the mud pumping device (4) comprises a connecting cylinder (41), a mud pumping pipe (42) and a motor (43); the inside of connecting cylinder (41) is coaxial to be equipped with connecting pipe (44), the even rigid coupling in circumference of connecting pipe (44) has fixed pipe (45), each the head of fixed pipe (45) and the curb plate fixed connection of connecting cylinder (41), the top of mud pumping pipe (42) is rotated and is connected in connecting pipe (44), mud pumping pipe (42) still rotates with the bottom plate of connecting cylinder (41) and is connected, the even rigid coupling in bottom circumference of mud pumping pipe (42) has broken blade (46), broken blade (46) are located the below of reamer piece (34), the roof upper surface rigid coupling of connecting cylinder (41) has waterproof aircraft bonnet (47), motor (43) rigid coupling is in waterproof aircraft bonnet (47), the output shaft bottom rigid coupling of motor (43) has rotary column (48), rotary column (48) and the roof of connecting cylinder (41) rotate and are connected, the bottom of rotary column (48) rotates and is connected in connecting pipe (44), supporting rods (49) are uniformly and fixedly connected between the bottom of the rotating column (48) and the top of the mud pumping pipe (42) in the circumferential direction, a conversion bin (410) is fixedly connected to the top of the waterproof hood (47), each fixed pipe (45) is connected with the conversion bin (410) through a pipeline (411), and a joint pipe (412) is fixedly connected to the top of the conversion bin (410);

the telescopic connecting piece (6) is connected between the rotary seat (31) and the mud pumping pipe (42);

the mud pump (7) is arranged outside the well body (1), a mud suction pipe (71) of the mud pump (7) is connected with the connector pipe (412) through a flange (72), and a mud discharge pipe (73) of the mud pump (7) is connected with an external mud pool.

2. The sand pumping and water draining equipment for the open caisson construction of the quicksand layer and the clay layer as claimed in claim 1, which is characterized in that: the circumference evenly is equipped with fixed orifices (22) that run through on attachment strap (12), the lower surface rigid coupling of collar (2) has fixing screw (23) corresponding with fixed orifices (22), during fixing screw (23) inserted corresponding fixed orifices (22), meshing has fixation nut (24) on fixing screw (23) of attachment strap (12) below.

3. The sand pumping and water draining equipment for the open caisson construction of the quicksand layer and the clay layer as claimed in claim 2, which is characterized in that: annular spout (35) have been seted up to the inner circle of attachment strap (12), the outside rigid coupling of swivel mount (31) has slider (36) with spout (35) sliding connection, and annular track groove (37) have still been seted up to the upper and lower side of attachment strap (12), the upper and lower bilateral symmetry rigid coupling of swivel mount (31) has L shape mounting panel (38), each the meshing has lifting screw (39) that correspond with track groove (37) on mounting panel (38), and one side that lifting screw (39) are close to track groove (37) is rotated and is connected with direction runner (310).

4. The sand pumping and water draining equipment for the open caisson construction of the quicksand layer and the clay layer as claimed in claim 3, wherein: the head of adjustable connecting piece (5) fixedly connected with extension board (51), it is connected with axostylus axostyle (52) to rotate on extension board (51), the bottom rigid coupling of axostylus axostyle (52) has limiting plate (53), the bottom rigid coupling of limiting plate (53) has connecting screw (54), connecting screw (55) that correspond with connecting screw (54) are seted up to the upper surface of collar (2).

5. The sand pumping and water draining equipment for the open caisson construction of the quicksand layer and the clay layer as claimed in claim 4, wherein: the adjustable connecting piece (5) comprises a fixed rod (56), an adjusting rod (57) and an adjusting nut (58); one end and waterproof aircraft bonnet (47) fixed connection of dead lever (56), set up through-hole (59) that supply pipeline (411) to pass through on dead lever (56), cavity (510) have been seted up to the other end of dead lever (56), guide way (511) have evenly been seted up to the inner wall circumference of cavity (510), adjust the one end sliding connection of pole (57) in cavity (510), adjust pole (57) and go up the rigid coupling have with track groove (37) sliding connection's guide block (512), be equipped with thread groove (513) on adjusting pole (57), adjusting nut (58) and thread groove (513) meshing, adjusting nut (58) outside still the rigid coupling have hold cover (514), hold cover (514) and the outer wall rotation of dead lever (56) and be connected.

6. The sand pumping and water draining equipment for the open caisson construction of the quicksand layer and the clay layer as claimed in claim 5, wherein: telescopic connection spare (6) are including each other registrates sliding connection's sleeve pipe (61) and slide bar (62), and telescopic connection spare (6)'s both ends rigid coupling has connecting stud (63), and the rigid coupling has spring (64) between the head of slide bar (62) and the inner chamber bottom of sleeve pipe (61), and spacing groove (65) have evenly been seted up to the outer lane circumference of slide bar (62), and the inner chamber rigid coupling of sleeve pipe (61) has stopper (66) with spacing groove (65) sliding connection, the outside of swivel mount (31) and the outer wall rigid coupling of taking out mud pipe (42) have connecting thread cover (67) that correspond with connecting stud (63).

7. A sand pumping and drainage method for open caisson construction of a quicksand layer and a clay layer is characterized in that: the method comprises the following steps:

s1: firstly, excavating an auxiliary pit (B) on a soil body (A) at a construction position, pouring an annular plain concrete base plate (C) at the bottom of the auxiliary pit (B), excavating an accommodating groove (D) corresponding to a crushing blade (46) at the bottom of the auxiliary pit (B), and then hoisting a well body (1) to the base plate (C);

s2: assembling the equipment;

s3: after the equipment is assembled, pressure water is pumped from the top of the water spraying pipeline (13), and the motor (43) and the slurry pump (7) are started, so that construction can be carried out.

8. The sand pumping and water draining method for open caisson construction of quicksand and clay layers as claimed in claim 7, wherein: the pit wall of the auxiliary pit (B) is obliquely arranged, and the included angle between the pit wall and the horizontal plane is 30-45 degrees.

Technical Field

The invention relates to the technical field of open caisson construction, in particular to sand pumping and drainage equipment and a method for open caisson construction of a quicksand layer and a clay layer.

Background

The open caisson construction is a construction process in which a structure in the shape of a shaft made of reinforced concrete on the ground in advance is used as a support for a pit wall of a foundation pit, earth is dug in the pit mechanically and manually under the protection of the wall of the pit, and the structure which is sunk into the earth under the action of the dead weight of the structure is called an open caisson, and is actually a structure which is cast in advance on the ground and is sunk to the ground to a certain depth through the earth digging to form an underground structure.

Compared with the traditional foundation pit excavation, the foundation pit excavation method has the advantages that the influence on the soil body of the surrounding environment is small, and meanwhile, the pit wall collapse phenomenon in the foundation pit excavation process can be effectively avoided.

When the open caisson is constructed on the quicksand layer and the clay layer, the open caisson has larger difference compared with the traditional excavation type open caisson construction, because the quicksand layer and the clay layer have softer soil quality and more accumulated water, when the open caisson is excavated manually, the excavation operation is difficult to carry out due to the climing of the accumulated water, and the speed of the engineering construction is slower.

When the open caisson is constructed at the positions of a sand flowing layer and a clay layer, a soil body at the position of a well body cutting edge is impacted by a high-pressure water gun to form slurry, and then the slurry is pumped out by a slurry pump, so that the purpose of descending the open caisson is achieved.

However, when the method is implemented, the high-pressure water gun is only used for impacting the soil body, so that the construction speed is low.

Disclosure of Invention

In order to solve the problems, the invention provides sand pumping and drainage equipment and a method for open caisson construction of a quicksand layer and a clay layer.

A sand pumping and drainage device for open caisson construction of a quicksand layer and a clay layer comprises a well body, wherein the bottom of the well body is fixedly connected with a cutting edge, the lower part of the inner wall of the well body is fixedly connected with an annular butt strap, and the inner circumference of an integrated structure of the cutting edge and the well body is uniformly provided with a water spraying pipeline; the mounting ring is arranged on the upper surface of the butt strap, and an annular rack is fixedly connected to the inner ring of the mounting ring;

the mincing device comprises a rotary seat and a reamer rod; the rotary seat is rotatably connected to the inner ring of the mounting ring and is uniformly arranged in a plurality of positions around the circumference of the axis of the mounting ring, the reamer rod is rotatably connected into the rotary seat, a gear meshed with the rack is fixedly connected to the top of the reamer rod, reamer blades are uniformly and fixedly connected to the circumference of the bottom of the reamer rod, and the positions of the reamer blades correspond to the positions of the blade feet;

the upper circumference of the mud pumping device is uniformly and fixedly connected with the adjustable connecting piece, the other end of the adjustable connecting piece is connected with the mounting ring, and the mud pumping device comprises a connecting cylinder, a mud pumping pipe and a motor; the connecting cylinder is coaxially internally provided with connecting pipes, the connecting pipes are uniformly and fixedly connected with fixed pipes in the circumferential direction, the head of each fixed pipe is fixedly connected with a side plate of the connecting cylinder, the top of the mud pumping pipe is rotatably connected in the connecting pipe, the mud pumping pipe is also rotatably connected with a bottom plate of the connecting cylinder, the circumference of the bottom of the mud pumping pipe is uniformly and fixedly connected with a crushing blade which is positioned below a reamer blade, the upper surface of a top plate of the connecting cylinder is fixedly connected with a waterproof hood, a motor is fixedly connected in the waterproof hood, the bottom of an output shaft of the motor is fixedly connected with a rotary column, the rotary column is rotatably connected with the top plate of the connecting cylinder, the bottom of the rotary column is rotatably connected in the connecting pipe, supporting rods are uniformly and fixedly connected between the bottom of the rotary column and the top of the mud pumping pipe in the circumferential direction, the top of the waterproof hood is fixedly connected with a conversion bin, and each fixed pipe is connected with the conversion bin through a pipeline, the top of the conversion bin is fixedly connected with a joint pipe;

the telescopic connecting piece is connected between the rotary seat and the mud pumping pipe;

the mud pump is arranged outside the well body, a mud suction pipe of the mud pump is connected with the joint pipe through a flange, and a mud discharge pipe of the mud pump is connected with an external mud pool.

Furthermore, the circumference evenly is equipped with the fixed orifices that runs through on the attachment strap, the lower surface rigid coupling of collar has the fixed screw who corresponds with the fixed orifices, during the fixed screw inserts the fixed orifices that corresponds, the meshing has fixation nut on the fixed screw of attachment strap below.

Furthermore, an annular sliding groove is formed in the inner ring of the butt strap, a sliding block in sliding connection with the sliding groove is fixedly connected to the outer side of the rotary seat, annular track grooves are further formed in the upper side face and the lower side face of the butt strap, L-shaped support plates are symmetrically and fixedly connected to the upper side face and the lower side face of the rotary seat, lifting screw rods corresponding to the track grooves are meshed to the support plates, and a guide rotating wheel is rotatably connected to one side, close to the track grooves, of each lifting screw rod.

Furthermore, the head of the adjustable connecting piece is fixedly connected with a support plate, the support plate is connected with a shaft rod in a rotating mode, the bottom of the shaft rod is fixedly connected with a limiting plate, the bottom of the limiting plate is fixedly connected with a connecting screw rod, and the upper surface of the mounting ring is provided with a connecting screw hole corresponding to the connecting screw rod.

Furthermore, the adjustable connecting piece comprises a fixed rod, an adjusting rod and an adjusting nut; the one end and the waterproof aircraft bonnet fixed connection of dead lever set up the through-hole that supplies the pipeline to pass through on the dead lever, and the cavity has been seted up to the other end of dead lever, the guide way has evenly been seted up to the inner wall circumference of cavity, the one end sliding connection of adjusting the pole has the guide block with track groove sliding connection in the cavity, the rigid coupling has on the regulation pole, be equipped with the thread groove on the regulation pole, adjusting nut and thread groove meshing, the outside rigid coupling that still has of adjusting nut holds the cover, it rotates with the outer wall of dead lever to hold the cover and is connected.

Further, telescopic connection spare is including the sleeve pipe and the slide bar of mutual registration sliding connection, and telescopic connection spare's both ends rigid coupling has connecting screw, and the rigid coupling has the spring between the head of slide bar and the sheathed tube inner chamber bottom, and the spacing groove has evenly been seted up to the outer lane circumference of slide bar, and sheathed tube inner chamber rigid coupling has the stopper with spacing groove sliding connection, the outer wall rigid coupling of the outer side of swivel mount and mud pumping pipe has the connecting thread cover that corresponds with connecting screw.

A sand pumping and drainage method for open caisson construction of a quicksand layer and a clay layer comprises the following steps:

s1: firstly, excavating an auxiliary pit B on a soil body A at a construction position, pouring an annular plain concrete base plate C at the bottom of the auxiliary pit B, excavating an accommodating groove D corresponding to a crushing blade at the bottom of the auxiliary pit B, and then hoisting a well body onto the base plate C;

s2: assembling the equipment;

s3: after the equipment is assembled, pressure water is pumped from the top of the water spraying pipeline, and the motor and the slurry pump are started, so that construction can be carried out.

Preferably, the pit wall of the auxiliary pit B is obliquely arranged, and the included angle between the pit wall and the horizontal plane is 30-45 degrees.

The device has the advantages that in the using process, the soil body A is ground at the position of the blade through the grinding device, and forms slurry by matching with high-pressure water flow sprayed from the water spraying pipeline, so that the well body can be smoothly settled, the slurry pumping device can pump the slurry, the soil body A which cannot be ground by the grinding device is crushed through the crushing blade and is mixed with water flowing out of the water spraying pipeline and overflow water generated in the construction process of the open caisson to form slurry, and the slurry is pumped out of the well body integrally through the slurry pump.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive labor.

FIG. 1: the invention relates to a structural schematic diagram of sand pumping and drainage equipment for open caisson construction of a quicksand layer and a clay layer;

FIG. 2: FIG. 1 is an enlarged view of a portion of section I;

FIG. 3: FIG. 1 is an enlarged view of a portion of FIG. II;

FIG. 4: FIG. 1 shows an enlarged view of a portion of III;

FIG. 5: the invention discloses a structural schematic diagram of a mud pumping device;

FIG. 6: the structure of the access board is shown schematically;

FIG. 7: the structure of the mounting ring is schematic;

FIG. 8: the invention discloses a structural schematic diagram of the mincing device;

FIG. 9: the structure of the sliding rod is schematically shown;

FIG. 10: the structure of the sleeve is schematic;

FIG. 11: the invention discloses a construction schematic diagram of sand pumping and drainage equipment for open caisson construction of a quicksand layer and a clay layer.

The reference numbers are as follows:

a, soil body A, B, auxiliary pit B, C, base plate C and D, accommodating groove D;

1-well body, 11-cutting edge, 12-lapping plate and 13-water spraying pipeline;

2-mounting ring, 21-rack, 22-fixing hole, 23-fixing screw rod and 24-fixing nut;

3-mincing device, 31-rotary seat, 32-reamer rod, 33-gear, 34-reamer blade, 35-sliding groove, 36-sliding block, 37-track groove, 38-support plate, 39-lifting screw rod and 310-guide rotating wheel;

4-a mud pumping device, 41-a connecting cylinder, 42-a mud pumping pipe, 43-a motor, 44-a connecting pipe, 45-a fixed pipe, 46-a crushing blade, 47-a waterproof hood, 48-a rotating column, 49-a supporting rod, 410-a conversion bin, 411-a pipeline and 412-a joint pipe;

5-adjustable connecting piece, 51-support plate, 52-shaft rod, 53-limit plate, 54-connecting screw rod, 55-connecting screw hole, 56-fixing rod, 57-adjusting rod, 58-adjusting nut, 59-through hole, 510-cavity, 511-guide groove, 512-guide block, 513-thread groove and 514-holding sleeve;

6-telescopic connecting piece, 61-sleeve, 62-slide bar, 63-connecting stud, 64-spring, 65-limiting groove, 66-limiting block and 67-connecting threaded sleeve;

7-slurry pump, 71-suction pipe, 72-flange, 73-mud discharge pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-11, a sand pumping and drainage device for use in open caisson construction of a quicksand layer and a clay layer comprises a well body 1, wherein the bottom of the well body 1 is fixedly connected with a cutting edge 11, the lower part of the inner wall of the well body 1 is fixedly connected with an annular butt strap 12, the inner circumference of the integral structure of the cutting edge 11 and the well body 1 is uniformly provided with a water spraying pipeline 13, and the sand pumping and drainage device further comprises a mounting ring 2, a mincing device 3, a mud pumping device 4, an adjustable connecting piece 5, a telescopic connecting piece 6 and a mud pump 7; the mounting ring 2 is arranged on the upper surface of the butt strap 12, and an annular rack 21 is fixedly connected to the inner ring of the mounting ring 2;

the mincing device 3 comprises a rotary seat 31 and a reamer rod 32; the rotary seat 31 is rotatably connected to the inner ring of the mounting ring 2 and is uniformly provided with a plurality of rotary seats around the circumference of the axis of the mounting ring 2, the reamer rod 32 is rotatably connected in the rotary seat 31, the top of the reamer rod 32 is fixedly connected with a gear 33 meshed with the rack 21, the circumference of the bottom of the reamer rod 32 is uniformly fixedly connected with a reamer blade 34, and the position of the reamer blade 34 corresponds to the position of the blade foot 11;

the upper circumference of the mud pumping device 4 is uniformly and fixedly connected with an adjustable connecting piece 5, the other end of the adjustable connecting piece 5 is connected with the mounting ring 2, and the mud pumping device 4 comprises a connecting cylinder 41, a mud pumping pipe 42 and a motor 43; the connecting tube 41 is coaxially provided with a connecting tube 44 inside, the connecting tube 44 is uniformly and fixedly connected with fixed tubes 45 along the circumferential direction, the head of each fixed tube 45 is fixedly connected with a side plate of the connecting tube 41, the top of the mud pumping tube 42 is rotatably connected in the connecting tube 44, the mud pumping tube 42 is also rotatably connected with a bottom plate of the connecting tube 41, the circumference of the bottom of the mud pumping tube 42 is uniformly and fixedly connected with a crushing blade 46, the crushing blade 46 is positioned below the reamer 34, the upper surface of the top plate of the connecting tube 41 is fixedly connected with a waterproof hood 47, the motor 43 is fixedly connected in the waterproof hood 47, the bottom of the output shaft of the motor 43 is fixedly connected with a rotary column 48, the rotary column 48 is rotatably connected with the top plate of the connecting tube 41, the bottom of the rotary column 48 is rotatably connected in the connecting tube 44, supporting rods 49 are uniformly and fixedly connected between the bottom of the rotary column 48 and the top of the mud pumping tube 42 along the circumferential direction, the top of the waterproof hood 47 is fixedly connected with a conversion bin 410, each fixed tube 45 is connected with the conversion bin 410 through a pipeline 411, the top of the conversion bin 410 is fixedly connected with a joint pipe 412;

the telescopic connecting piece 6 is connected between the rotary seat 31 and the mud pumping pipe 42;

the mud pump 7 is arranged outside the well body 1, a mud suction pipe 71 of the mud pump 7 is connected with a joint pipe 412 through a flange 72, and a mud discharge pipe 73 of the mud pump 7 is connected with an external mud pool.

Preferably, the access panel 12 is provided with fixing holes 22 uniformly penetrating the circumference, the lower surface of the mounting ring 2 is fixedly connected with fixing screws 23 corresponding to the fixing holes 22, the fixing screws 23 are inserted into the corresponding fixing holes 22, and the fixing nuts 24 are engaged with the fixing screws 23 below the access panel 12.

Preferably, an annular sliding groove 35 is formed in the inner ring of the access board 12, a sliding block 36 slidably connected with the sliding groove 35 is fixedly connected to the outer side of the swivel base 31, annular track grooves 37 are further formed in the upper and lower side surfaces of the access board 12, L-shaped support plates 38 are symmetrically and fixedly connected to the upper and lower sides of the swivel base 31, a lifting screw 39 corresponding to the track grooves 37 is engaged with each support plate 38, and a guide rotating wheel 310 is rotatably connected to one side of the lifting screw 39 close to the track grooves 37.

Preferably, the head of the adjustable connector 5 is fixedly connected with a support plate 51, the support plate 51 is rotatably connected with a shaft rod 52, the bottom of the shaft rod 52 is fixedly connected with a limit plate 53, the bottom of the limit plate 53 is fixedly connected with a connecting screw 54, and the upper surface of the mounting ring 2 is provided with a connecting screw hole 55 corresponding to the connecting screw 54.

Preferably, the adjustable connector 5 comprises a fixing rod 56, an adjusting rod 57 and an adjusting nut 58; one end of the fixing rod 56 is fixedly connected with the waterproof machine cover 47, a through hole 59 for the pipeline 411 to pass through is formed in the fixing rod 56, a cavity 510 is formed in the other end of the fixing rod 56, a guide groove 511 is uniformly formed in the circumference of the inner wall of the cavity 510, one end of the adjusting rod 57 is slidably connected into the cavity 510, a guide block 512 slidably connected with the track groove 37 is fixedly connected onto the adjusting rod 57, a thread groove 513 is formed in the adjusting rod 57, the adjusting nut 58 is meshed with the thread groove 513, a holding sleeve 514 is fixedly connected to the outer portion of the adjusting nut 58, and the holding sleeve 514 is rotatably connected with the outer wall of the fixing rod 56.

Preferably, the telescopic connecting piece 6 comprises a sleeve 61 and a slide rod 62 which are sleeved with each other and slidably connected, two ends of the telescopic connecting piece 6 are fixedly connected with connecting studs 63, a spring 64 is fixedly connected between the head of the slide rod 62 and the bottom of an inner cavity of the sleeve 61, a limiting groove 65 is uniformly formed in the circumference of an outer ring of the slide rod 62, a limiting block 66 slidably connected with the limiting groove 65 is fixedly connected with the inner cavity of the sleeve 61, and a connecting thread sleeve 67 corresponding to the connecting studs 63 is fixedly connected with the outer side of the swivel base 31 and the outer wall of the mud pumping pipe 42.

A sand pumping and drainage method for open caisson construction of a quicksand layer and a clay layer comprises the following steps:

s1: firstly, excavating an auxiliary pit B on a soil body A at a construction position, pouring an annular plain concrete base plate C at the bottom of the auxiliary pit B, excavating an accommodating groove D corresponding to a crushing blade 46 at the bottom of the auxiliary pit B, and then hoisting a well body 1 onto the base plate C;

s2: assembling the equipment;

s3: after the equipment is assembled, pressurized water is pumped from the top of the water spraying pipeline 13, and the motor 43 and the mud pump 7 are started, so that construction can be carried out.

Preferably, the pit wall of the auxiliary pit B is obliquely arranged, and the included angle between the pit wall and the horizontal plane is 30-45 degrees.

One embodiment of the present invention is:

(1) firstly, excavating an auxiliary pit B in a soil body A at a construction position, excavating hardened soil on the surface layer of the construction position to expose the soil of a quicksand layer and a clay layer, obliquely arranging the pit wall of the auxiliary pit B at an inclination angle of 30-45 degrees, reducing the phenomenon that the pit wall collapses due to the oblique auxiliary pit B, pouring an annular plain concrete base plate C at the bottom of the pit after the auxiliary pit B is excavated, excavating a containing groove D at the bottom of the pit, and hoisting a well body 1 to the base plate C.

(2) And then equipment is assembled, the annular butt strap 12 for the inner wall lower part of the well body 1 is integrally poured, the butt strap 12 can be used as a base for assembling the equipment, and the butt strap 12 can also be used for placing a concrete slab for sealing the bottom of the open caisson after the open caisson construction is finished.

Assembling the mounting ring 2: the fixing screws 23 are first inserted into the corresponding fixing holes 22, and then fixing nuts 24 are screwed on the fixing screws 23 under the access panel 12, so that the mounting ring 2 is fixed.

Assembly of the grinding device 3: the swivel base 31 is connected to the inner ring of the attachment plate 12 by the cooperation of the slide block 36 and the slide groove 35, and then each lifting screw 39 is screwed so that the guide runner 310 enters the corresponding track groove 37, at which time each gear 33 is engaged with the tooth plate, and thus the mincing means 3 is slidably connected to the inner ring of the attachment plate 12.

Assembling the mud pumping device 4: when the grip sleeve 514 rotates, the adjusting nut 58 is driven to rotate, because the adjusting rod 57 is limited by the matching of the guide block 512 and the guide groove 511, i.e., the adjustment rod 57 can only translate in the axial direction thereof, and the adjustment nut 58 engages with the threaded groove 513 on the adjustment rod 57, and the axial positions of the grip 514 and the adjustment nut 58 cannot be changed, when the grip 514 and the adjustment nut 58 are rotated, the adjustment rod 57 is moved in the axial direction thereof, so that the length of the adjustable connection member 5 can be adjusted such that each connection screw 54 is aligned with the corresponding connection screw hole 55, the shaft rod 52, the stopper and the connection screw 54 are rotated to have an integrated structure, such that the connection screw 54 is inserted into the corresponding connection screw hole 55, thereby it is fixed to realize taking out the installation of mud device 4, through limiting plate 53's setting for take out the mounting height of mud device 4 and confirm, the equipment of the follow-up telescopic connection 6 of being convenient for.

Assembling the telescopic connecting piece 6: due to the arrangement of the limiting plate 53, the height of the connecting threaded sleeve 67 on the swivel base 31 is consistent with that of the connecting threaded sleeve 67 on the mud pumping pipe 42, so that the telescopic connector 6 can be connected between the swivel base 31 and the mud pumping pipe 42 through the matching of the connecting stud 63 and the connecting threaded sleeve 67.

The mud pump 7 is placed on the soil body A outside the well body 1, the mud suction pipe 71 is connected with the connector pipe 412 through the connecting flange 72, and the head of the mud discharge pipe 73 extends into an external mud pool.

Through the process, the equipment can be assembled.

(3) After equipment assembly accomplished, knockout the backing plate C, can carry out open caisson construction, plain concrete is by the structure that no muscle or the concrete that is not configured with the atress reinforcing bar made to make and be convenient for knockout it before the construction, backing plate C knocks out the back, well body 1 and the equipment of equipment in it descend, and broken blade 46 is initial to fall into holding tank D, can avoid broken blade 46 to be pressed bad initially.

During construction, the motor 43 and the mud pump 7 are started, pressure water flow is introduced into each water spraying pipeline 13, and the pressure water flow can be introduced through a high-pressure water gun.

The motor 43 drives the rotating column 48, the supporting rod 49 and the mud pumping pipe 42 to rotate in an integrated structure when working, the mud pumping pipe 42 drives the mincing device 3 to revolve around the axis of the mud pumping pipe 42 through the telescopic connector 6, the reamer rod 32 rotates around the axis of the reamer rod 32 due to the matching of the gear 33 and the rack 21, so that the reamer rod 32 and the reamer blade 34 simultaneously revolve and rotate, the reamer blade 34 minces the soil body A at the position of the blade 11 and matches with high-speed water flow sprayed by the water spraying pipeline 13 at the position of the blade 11, and mud is generated.

When the mud pumping pipe 42 rotates, the crushing blade 46 is driven to rotate, the crushing blade 46 crushes the soil body A which cannot be crushed by the crushing device 3, and the soil body A is mixed with the water flowing out of the water spraying pipeline 13 and the overflow water generated in the open caisson construction process to form mud.

When the mud pump 7 passes through, mud is pumped through the mud pumping pipe 42, the connecting pipe 44, the fixed pipe 45, the pipeline 411, the conversion bin 410, the joint pipe 412 and the mud suction pipe 71 in sequence, and is discharged to an external mud pit through the mud discharge pipe 73.

This equipment can carry out the quick construction of open caisson at sand bed and clay layer position, and the equipment that various devices and structure can be nimble to be convenient for assemble at the construction, and dismantle after the construction is accomplished.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.