CN112064640B

CN112064640B - Pile driver of split combined type full pile casing and construction process thereof

Info

Publication number: CN112064640B
Application number: CN202010980073.7A
Authority: CN
Inventors: 张健
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2024-08-13
Anticipated expiration: 2040-09-17
Also published as: CN112064640A

Abstract

The invention relates to a pile driver of a split combined type full-pile casing and a construction process thereof, comprising a movable pile driver main body, a drilling device arranged on the pile driver main body and used for drilling and a pile casing main body used for supporting the wall of a pile hole; the pile casing main body comprises a plurality of pile casing components which are vertically connected, the pile casing components comprise a plurality of arc pile casing pieces, the arc pile casing pieces are sequentially connected end to form a cylindrical structure, and the upper pile casing piece and the lower pile casing piece of the connected pile casing components are connected through a connecting clamping piece; the pile machine main body comprises a pile machine frame body, an upper hoop device for pressing or pulling out the pile hole from the pile casing sheet and a lower hoop device for positioning and stabilizing the pile casing sheet are further arranged on the pile machine frame body, and a vertical displacement guide groove is formed in the pile machine frame body, so that the upper hoop device can move up and down along the vertical displacement guide groove. The invention has the advantages of small volume, flexible maneuvering, simple equipment, easy popularization and the like.

Description

Pile driver of split combined type full pile casing and construction process thereof

Technical Field

The invention relates to a pile driver, in particular to a pile driver of a split combined type full-pile casing and a construction process thereof, and belongs to the technical field of pile foundation engineering construction.

Background

With the increasing development of the building industry and the continuous progress of scientific technology, the technical requirements on the building construction machinery are also higher and higher. At present, in order to prevent the problems of hole wall collapse or necking and the like in the construction pore-forming process of a pile foundation bored pile, most of the problems depend on slurry wall protection, such as a positive and negative circulation pile machine, an impact pore-forming pile machine, a rotary pile machine and the like, and all-casing wall protection is fresh and mainly comprises a all-rotation all-casing drilling machine.

The mud wall protection pore-forming technology is to adjust the consistency of mud in the pore in the drilling process, and support the pore wall soil layer by using the gravity action of the mud so as to achieve the wall protection effect. The slurry retaining wall pore-forming technology has the outstanding problems that: in the environment, a large amount of mud causes environmental pollution, mud treatment is difficult, and the construction site is muddy; in terms of construction quality, the quality of hole forming is difficult to fully guarantee, the problems of hole collapse, shrinkage cavity, excessive thick sediment at the bottom of the hole and the like are easy to occur, and the quality of a pile foundation is directly influenced.

The whole sleeve pore-forming technology adopts a steel sleeve to support the pore wall, does not need slurry wall protection, and avoids the problems of slurry wall protection. The full sleeve hole forming process is to drive the whole sleeve to cut the soil layer to a designated position through the full rotary drilling machine, take out the soil in the sleeve by utilizing the punching grab bucket, and then perform the next sleeve rotation to cut the soil layer, so that the hole forming is completed. The whole-sleeve pore-forming process has the outstanding problems that a plurality of matched devices are needed, the whole sleeve is screwed in and pulled out of soil body, powerful power equipment is needed due to huge grinding resistance, the maneuverability is poor, the sleeve with each diameter is fixed on the pile type with the diameter, the practicability of the steel sleeve is single, and the like, so that the problems of high construction difficulty, high energy consumption and high cost of the whole-sleeve pore-forming process are solved.

Disclosure of Invention

The invention mainly aims at the problems existing in the prior art, and provides a pile driver of a split combined type full pile casing and a construction process thereof, wherein the pile driver has the advantages of small volume, flexible maneuvering, simple equipment and easy popularization.

The aim of the invention is mainly achieved by the following scheme:

A pile driver of a split combined type full pile casing comprises a movable pile driver main body, a drilling device arranged on the pile driver main body and used for drilling and a casing main body used for supporting the wall of a pile hole; the pile casing main body comprises a plurality of pile casing assemblies which are vertically connected, the pile casing assemblies comprise a plurality of arc pile casing sheets, the arc pile casing sheets are sequentially connected end to form a cylindrical structure, and two upper pile casing sheets and lower pile casing sheets which are adjacent to each other in the connected pile casing assemblies are connected through a connecting clamping piece; the pile driver body comprises a pile driver frame body, an upper hoop device for pressing or pulling out the pile casing piece into or from a pile hole and a lower hoop device for positioning and stabilizing the pile casing piece are further arranged on the pile driver frame body, a vertical displacement guide groove is formed in the pile driver frame body, and the upper hoop device can move up and down along the vertical displacement guide groove.

Preferably, a first groove is formed in the left side of the pile casing piece, a first lug matched with the first groove is arranged on the right side of the pile casing piece, and two adjacent pile casing pieces in the same pile casing assembly are connected in a mode that the first lug is inserted into the first groove; the upper side of a section of thick bamboo piece is protected and is equipped with the second recess, protect the downside of a section of thick bamboo piece be equipped with second recess assorted second lug, two upper and lower adjacent section of thick bamboo pieces in the section of thick bamboo subassembly that links to each other protect are connected through the mode that the second lug inserted in the second recess, and two upper and lower adjacent section of thick bamboo pieces protect are connected through connecting the fastener, when protecting the section of thick bamboo piece and pulling up, the whole section of thick bamboo piece that protects is listed as together pulls up through connecting the fastener.

Preferably, the length of the pile casing sheet is 2-3m, the thickness of the pile casing sheet is 30-40mm, and the arc length of the pile casing sheet is divided evenly according to different pile diameter circumferences.

Preferably, the pile driver main body further comprises a pile driver platform, a crawler traveling part arranged below the pile driver platform, a winch part arranged above the pile driver platform and a power distribution system, and the pile driver frame body is arranged on the pile driver platform; one end of the traction steel wire rope and one end of the cable are connected with the winch part, and the other end of the traction steel wire rope are connected with the drilling device after bypassing the pile frame body and the fixed pulley block on the hanging beam at the top of the pile frame body.

Preferably, the top of the pile frame body is provided with a horizontal displacement guide groove, and the lifting beam drives the drilling device to move left and right along the horizontal displacement guide groove through a horizontal displacement hydraulic bidirectional jack connected with two sides of the lifting beam.

Preferably, the drilling apparatus comprises a grab and a down-the-hole power drill bit.

Preferably, the down-the-hole power drill bit comprises a power drill component, a cutter head component and a soil barrel component, wherein the power drill component comprises a hanging bracket, a motor reducer arranged on the hanging bracket and an underwater motor in transmission connection with the motor reducer, and the cutter head component is in transmission connection with an output shaft of the motor reducer.

Preferably, the soil loading barrel assembly comprises a soil loading barrel and a horizontal telescopic resistance rod arranged on the soil loading barrel and used for resisting the rotation counter force of the down-the-hole power drill bit, the soil loading barrel is arranged between the hanging frame and the cutter head assembly, a vertical resistance rod is arranged on the hanging frame, and the vertical resistance rod is inserted into the soil loading barrel.

Preferably, the cutter head assembly comprises a vertical dental drill for cutting the soil downwards and a horizontal dental drill for cutting the soil below the pile casing main body, the horizontal dental drill is rotationally connected to the cutter head assembly, and the down-the-hole power drill bit is downwards rotated due to self weight when being hung into a pile hole or lifted upwards.

A construction process of a pile driver of a split combined type full pile casing comprises the following steps:

firstly, leveling a construction site, temporarily distributing and laying, and paying off and positioning pile positions;

secondly, positioning a pile machine, centering, leveling and checking the perpendicularity of a pile machine frame body;

step three, assembling the first pile casing assembly, and starting an upper hoop device to press the first pile casing assembly to the ground after fixing the first pile casing assembly in place;

step four, installing a punching grab bucket, punching and grabbing soil;

Step five, drilling until the geological soil layer is hard and is not beneficial to punching and grabbing or the efficiency is low;

step six, taking down the punching grab bucket and installing a down-the-hole power drill bit to continue construction until all drilling holes are completed;

Hoisting a reinforcement cage, pouring underwater concrete, and synchronously slicing or extracting a pile casing sheet with a pouring concrete conduit in the pouring process;

And step eight, removing the pile driver main body, curing the concrete, and shifting the pile driver main body to the next pile hole for construction.

Therefore, the invention has the following advantages:

(1) Compared with the traditional pile machine relying on slurry protection, such as a positive and negative circulation drilling machine, a slurry protection wall impact hole drilling machine, a rotary digging pile machine and the like, the pile machine of the split combined type full pile protection barrel provided by the invention has obvious advantages in terms of environmental protection and engineering quality assurance, is environment-friendly, has good hole forming quality, does not shrink and collapse, and has higher assurance of pile forming quality because of no slurry;

(2) Compared with an integral sleeve adopted by a full-rotation full-sleeve pile machine, the pile machine of the split combined full-pile casing provided by the invention has the advantages that the required driving force is smaller, the pile casing sheets are convenient to transport and stack, the construction of various working conditions is easier and more flexible to realize, the equipment is simple, the manufacturing cost is low, and the requirements on site conditions are not high;

(3) Compared with the existing pile-driving drilling with drill pipes such as a rotary pile-driving machine, the pile-driving machine provided by the invention has the advantages that the height of the pile-driving machine is greatly reduced, the depth of drilling is not limited, the construction is safe, the manual frequent disassembly and assembly of the drill pipes are not needed to be adopted for the similar positive and negative circulation pile-driving machine, the time and labor are saved, the height of the pile-driving machine is small, and different drilling devices can be adopted for construction according to different working conditions, so that the pile-driving machine has strong pertinence, wide applicability and flexibility;

(4) The pile machine of the split combined type full-pile casing provided by the invention can finish pile foundation engineering construction without matching multiple sets of mechanical equipment, can independently finish all the work of pile foundation construction, and has the advantages of simple equipment, low manufacturing cost and easiness in popularization.

Drawings

FIG. 1 is a schematic view of a construction of the present invention;

FIG. 2 is a schematic top view of the cartridge guard assembly of the present invention;

FIG. 3 is a first view structural schematic of a cage of the present invention;

FIG. 4 is a second view structural schematic of a cage of the present invention;

FIG. 5 is a schematic top view of a cage plate of the present invention;

FIG. 6 is a schematic view of a connecting clip according to the present invention;

FIG. 7 is a schematic view of the construction of a down-the-hole power bit of the present invention;

FIG. 8 is a schematic view of the construction of the power drill assembly and cutterhead assembly of the present invention;

fig. 9 is a schematic top view of the cutterhead assembly of the present invention;

FIG. 10 is a schematic view of the lower construction of the cutterhead assembly of the present invention;

FIG. 11 is a schematic view of the upper structure of the soil bucket assembly of the present invention;

fig. 12 is a schematic view of the lower structure of the soil bucket assembly of the present invention.

Illustration of: 1-pile machine main body, 11-pile machine platform, 12-track running part, 13-winch part, 14-pile machine frame body, 15-distribution system, 121-track, 131-traction wire rope, 132-cable, 133-winch, 134-motor, 135-wire rope turntable, 136-cable turntable, 141-hanging beam, 142-fixed pulley block, 143-horizontal displacement guide groove, 144-upper hoop device, 145-lower hoop device, 146-vertical displacement guide groove, 147-horizontal displacement hydraulic bidirectional jack, 148-vertical displacement multistage oil jack, 2-drilling device, 21-down-the-hole power drill bit, 22-soil loading barrel component, 23-power drill component, 24-cutter head component, 221-soil loading barrel, 222-horizontal telescopic resistance rod, 223-sleeve, 231-hanging frame, 232-motor reducer, 233-underwater motor, 234-vertical resistance rod, 235-wire rope point, 236-motor wiring port, 241-vertical tooth, 242-horizontal tooth, 244-cutter head frame, 244-cutter head plate, 3-movable door panel, 31-retainer drum component, 31-32-retainer drum component, 243-retainer drum component, first groove, second groove and boss, and first groove and second groove and boss are connected.

Detailed Description

The technical scheme of the invention is further specifically described below through specific embodiments and with reference to the accompanying drawings. It should be understood that the practice of the invention is not limited to the following examples, but is intended to be within the scope of the invention in any form and/or modification thereof.

In the present invention, unless otherwise specified, all parts and percentages are by weight, and the equipment, materials, etc. used are commercially available or are conventional in the art. The methods in the following examples are conventional in the art unless otherwise specified. The components and devices in the following examples are, unless otherwise indicated, all those components and devices known to those skilled in the art, and their structures and principles are known to those skilled in the art from technical manuals or by routine experimentation.

Example 1:

As shown in fig. 1, the invention provides a technical scheme, namely a pile driver of a split combined type full pile casing, which consists of a movable pile driver body 1, a drilling device 2 arranged on the pile driver body 1 and used for drilling and a casing body 3 used for supporting the wall of a pile hole.

As shown in fig. 2 and 5, the pile casing main body 3 is composed of a plurality of vertically connected pile casing assemblies 31, the pile casing assemblies 31 are composed of a plurality of arc-shaped pile casing pieces 32, the arc-shaped pile casing pieces 32 are sequentially connected end to form a cylindrical structure, the length of the pile casing pieces 32 is 2-3m, the thickness of the pile casing pieces is 30-40mm, and the arc lengths of the pile casing pieces 32 are divided evenly according to the circumferences of different pile diameters; as shown in fig. 3 and 4, a first groove 321 is formed on the left side of the casing piece 32, a first bump 322 matched with the first groove 321 is formed on the right side of the casing piece 32, and two adjacent casing pieces 32 in the same casing assembly 31 are connected in a manner that the first bump 322 is inserted into the first groove 321; the upper side of the pile casing piece 32 is provided with a second groove 323, the lower side of the pile casing piece 32 is provided with a second lug 324 matched with the second groove 323, two upper and lower adjacent pile casing pieces 32 in the connected pile casing assembly 31 are connected in a mode that the second lug 324 is inserted in the second groove 323, the upper and lower adjacent pile casing pieces 32 are connected through a connecting clamping piece 33, and when the pile casing pieces 32 are pulled up, the whole pile casing pieces 32 are pulled up together through the connecting clamping piece 33.

The pile driver main body 1 consists of a pile driver platform 11, a crawler belt walking part 12 arranged below the pile driver platform 11, a winch part 13 arranged above the pile driver platform 11, a pile driver frame body 14 and a power distribution system 15; one end of the traction steel wire rope 131 and one end of the cable 132 are connected with the winch part 13, and the other end of the traction steel wire rope bypasses the pile frame body 14 and the fixed pulley block 142 on the hanging beam 141 at the top of the pile frame body 14 and then is connected with the drilling device 2; the top of the pile frame body 14 is provided with a horizontal displacement guide groove 143, and the hanging beam 141 drives the drilling device 2 to move left and right along the horizontal displacement guide groove 143 through a horizontal displacement hydraulic bidirectional jack 147 connected with two sides of the hanging beam 141; the pile frame body 14 is also provided with an upper hoop device 144 for pressing the pile casing sheet 32 into or pulling the pile hole and a lower hoop device 145 for positioning and stabilizing the pile casing sheet 32; the pile frame body 14 is also provided with a vertical displacement guide groove 146, and the upper hoop device 144 can move up and down along the vertical displacement guide groove 146; the drilling device 2 consists of a punching grab and a down-the-hole power drill bit 21.

As shown in fig. 7, the down-the-hole power drill bit 21 is composed of a power drill assembly 23, a cutter head assembly 24 and a soil barrel assembly 22, as shown in fig. 8, the power drill assembly 23 is composed of a hanging bracket 231, a motor reducer 232 arranged on the hanging bracket 231 and an underwater motor 233 in transmission connection with the motor reducer 232, and the cutter head assembly 24 is in transmission connection with an output shaft of the motor reducer 232.

As shown in fig. 11 and 12, the soil bucket assembly 22 is composed of a soil bucket 221 and a horizontal telescopic resistance rod 222 provided on the soil bucket 221 for resisting the rotation reaction force of the down-the-hole power drill bit 21, the soil bucket 221 is provided between the hanger 231 and the cutterhead assembly 24, and a vertical resistance rod 234 is provided on the hanger 231, and the vertical resistance rod 234 is inserted into the soil bucket 221.

As shown in fig. 9 and 10, the cutterhead assembly 24 is composed of a vertical dental drill 241 for cutting the soil downwards and a horizontal dental drill 242 for cutting the soil below the pile casing body 3, the horizontal dental drill 242 is rotatably connected to the cutterhead assembly 24, and the horizontal dental drill 242 is rotated downwards by a certain angle due to the dead weight when the down-the-hole power drill bit 21 is suspended into a pile hole or lifted up.

Example 2:

As shown in fig. 1, the present invention provides another technical solution, a pile driver of a split combined type full pile casing, which is composed of a movable pile driver body 1, a drilling device 2 arranged on the pile driver body 1 for drilling, and a casing body 3 for supporting the wall of the pile hole.

As shown in fig. 2 and 5, the casing main body 3 is composed of a plurality of casing assemblies 31 vertically connected, the casing assemblies 31 include a plurality of arc casing pieces 32, and the arc casing pieces 32 are sequentially connected end to form a cylindrical structure; as shown in fig. 3 and 4, a first groove 321 is formed on the left side of the casing piece 32, a first bump 322 matched with the first groove 321 is formed on the right side of the casing piece 32, and two adjacent casing pieces 32 in the same casing assembly 31 are connected in a manner that the first bump 322 is inserted into the first groove 321; the upper side of the pile casing piece 32 is provided with a second groove 323, the lower side of the pile casing piece 32 is provided with a second lug 324 matched with the second groove 323, and the upper and lower adjacent two pile casing pieces 32 in the connected pile casing assembly 31 are connected in a mode of being inserted into the second groove 323 through the second lug 324; the upper outer wall of the pile casing piece 32 is provided with a convex-shaped fixing groove 325, the lower outer wall of the pile casing piece 32 is provided with an inverted convex-shaped fixing groove 325, the fixing grooves 325 of two upper and lower adjacent pile casing pieces 32 are communicated, an I-shaped connecting clamping piece 33 capable of connecting the two pile casing pieces 32 is arranged in the pile casing piece, and when the pile casing pieces 32 are pulled up, the pile casing pieces 32 are pulled up together through the connecting clamping piece 33; as shown in fig. 6, the upper and lower end surfaces of the connecting clip 33 are further provided with a safety plug 331, so that the connection of the casing piece 32 can be ensured to be firm.

In order to reduce the resistance of the end part of the pile casing assembly 31, the bottom opening of the pile casing assembly 31 at the lowest layer is cut into inclined openings along the inner wall, and the pile casing sheet 32 is made of high-strength aluminum, aluminum alloy or steel plate, and the like, preferably high-strength aluminum, has light weight, is convenient to assemble and disassemble and is not easy to corrode; the length of the pile casing piece 32 is 2-3m, the thickness is 30-40mm, the arc length of each pile casing piece 32 is equal to 20 pieces according to the circumference of the pile casing with the diameter of 1000 mm, equal to 18 pieces with the diameter of 900 mm, equal to 16 pieces with the diameter of 800 mm and equal to 14 pieces with the diameter of 700 mm, the common pile diameter sizes on the construction engineering are 700 mm, 800 mm, 900 mm and 1000 mm, the circumference of the pile diameter sizes is divided into 18 pieces by taking 900 mm as an example, the pile casing piece 32 with the diameter of 20 pieces can be used for enclosing the pile casing assembly 31 with the approximate diameter of 1000 mm, the pile casing piece 32 with the 16 pieces can be used for enclosing the pile casing assembly 31 with the approximate diameter of 800 mm, and after reasonable classification, the circular arc specification of the pile casing piece 32 can be reduced, the requirement of more pile shapes can be met, and the applicability of the pile casing main body 3 is greatly improved, and the manufacturing cost of the pile casing main body 3 is reduced.

The pile driver main body 1 consists of a pile driver platform 11, a crawler belt walking part 12 arranged below the pile driver platform 11, a winch part 13 arranged above the pile driver platform 11, a pile driver frame body 14 and a power distribution system 15; the crawler belt walking part 12 adopts the motor to drive the crawler belt 121 to flexibly walk in the construction site, thereby meeting the construction requirement and saving the cost greatly compared with the fuel gas power equipment; the pile frame body 14 and the pile machine platform 11 are provided with a hydraulic lifting adjusting device, so that the pile frame body 14 is ensured to be vertical; the hoist part 13 adopts motor 134 as driving power, hoist 133 drives wire rope carousel 135 and cable conductor carousel 136 rotation, pull wire rope 131 one end and wire rope carousel 135 fixed connection of hoist part 13, the other end is connected with dashing grab bucket or down-the-hole power drill bit 21 after bypassing the fixed pulley group 142 on the hanging beam 141 at stake frame body 14 and stake frame body 14 top, cable 132 one end and cable conductor carousel 136 fixed connection of hoist part 13, the other end is connected with dashing grab bucket or down-the-hole power drill bit 21 after bypassing the fixed pulley group 142 on the hanging beam 141 at stake frame body 14 and stake frame body 14 top, provide power cord and video monitoring line for it, and wire rope carousel 135 and cable conductor carousel 136 synchronous rotation.

The pile frame body 14 has two parallel horizontal displacement guide slots 143 in front and back of the top, and the hanging beam 141 drives the grab bucket or the down-the-hole power drill bit 21 to move left and right along the horizontal displacement guide slots 143 through a horizontal displacement hydraulic bidirectional jack 147 connected with two sides of the hanging beam 141.

The pile frame body 14 is further provided with an upper hoop device 144 for pressing the pile casing sheet 32 into or pulling out of a pile hole and a lower hoop device 145 for positioning and stabilizing the pile casing sheet 32, wherein the upper hoop device 144 and the lower hoop device 145 are coaxially arranged and can be adjusted according to the size of the pile casing main body 3; the four upright posts of the pile frame body 14 are provided with vertical displacement guide grooves 146, the upper hoop device 144 can move up and down along the vertical displacement guide grooves 146, the upper Fang Sijiao of the upper hoop device 144 is provided with a vertical displacement multi-stage oil jack 148, the upper hoop device 144 moves up and down along the vertical displacement guide grooves 146 through the traction force of the vertical displacement multi-stage oil jack 148, the installed pile casing pieces 32 are vertically pressed into or pulled out of pile holes, the lower end face of the upper hoop device 144 is also fixedly provided with clamps with the same quantity as the pile casing pieces 32 of each pile casing assembly 31 through bolts, each clamp corresponds to a fixed groove 325 of the outer wall above each pile casing piece 32, namely, the clamps are fixed in the fixed groove 325 of the outer wall above the pile casing pieces 32 after being fixed on the lower end face of the upper hoop device 144, so that the pile casing pieces 32 can be pressed into or pulled out conveniently, and a single clamp or a plurality of pile casing pieces 32 can be freely selected according to the resistance in the pressing-in or pulling-out process to work.

The drilling device 2 adopts a traction steel wire rope 131 to connect two forms of a punching grab bucket and a down-the-hole power drill bit 21; according to geological conditions, the ground level or upper soil layer belongs to various soft soil properties such as backfill soil, sandy soil, mucky soil and the like, the pile hole of the part adopts a punching grab bucket to punch and grab soil for many times to finish hole forming, and the geological soil layer with high or incomplete punching grab difficulty adopts a down-the-hole power drill bit 21 to drill and fetch the soil to finish hole forming; the punching grab bucket adopts an underwater punching grab bucket commonly used in the prior art, and is not repeated; as shown in fig. 7, the down-the-hole power drill bit 21 is composed of a power drill assembly 23, a cutterhead assembly 24 and a soil bucket assembly 22.

As shown in fig. 8, the power drill assembly 23 is composed of a hanger 231, a motor reducer 232 disposed on the hanger 231, and an underwater motor 233 in driving connection with the motor reducer 232, and the cutterhead assembly 24 is in driving connection with an output shaft of the motor reducer 232. A wire rope hanging point 235 connected with the traction wire rope 131 is arranged at the top end of the hanging bracket 231, and a motor wiring port 236 connected with the cable 132 is arranged on the underwater motor 233.

As shown in fig. 11 and 12, the soil barrel assembly 22 is composed of a soil barrel 221 arranged between the hanger 231 and the cutter head assembly 24 and a horizontal telescopic resistance rod 222 arranged on the soil barrel 221 and used for resisting the rotation counter force of the down-the-hole power drill bit 21, the lower end of the soil barrel 221 is opened, the horizontal telescopic resistance rod 222 is a hydraulic telescopic rod and is respectively arranged in the top opening and the bottom opening of the soil barrel 221, the telescopic action of the horizontal telescopic resistance rod 222 is realized by controlling a hydraulic cylinder of the horizontal telescopic resistance rod 222 through a ground power switch, the hydraulic cylinder acts, the resistance is obtained by inserting the horizontal telescopic resistance rod 222 into the soil layer of the hole wall before the down-the-hole power drill bit 21 starts to drill soil, so as to resist the rotation counter force of the down-hole power drill bit 21, in order to obtain good effect, the horizontal telescopic resistance rods 222 above and below are all arranged in a crisscross, and a video camera is arranged on the top outside the soil barrel 221 along the periphery, so as to perform comprehensive monitoring; four vertical resistance rods 234 are arranged at the bottom of the hanging bracket 231, the vertical resistance rods 234 and the output shaft of the motor reducer 232 are inserted into the soil loading barrel 221, a sleeve 223 is arranged in the middle of the soil loading barrel 221, the output shaft of the motor reducer 232 is arranged in the sleeve 223 in a penetrating manner, the power drill assembly 23 and the cutter head assembly 24 can move up and down along the sleeve 223 in the soil loading barrel 221, and after the down-the-hole power drill 21 starts to work, the vertical resistance rods 234 obtain horizontal rotation resistance from the soil loading barrel 221 so as to ensure the stability of the fixed part of the power drill assembly 23 when the down-the-hole power drill 21 works.

As shown in fig. 9 and 10, the cutterhead assembly 24 is composed of a cutterhead frame 243, a cutterhead valve plate 244, a vertical dental drill 241 for cutting soil downwards and a horizontal dental drill 242 for cutting soil in a range below the pile casing main body 3, wherein the cutterhead frame 243 is fixed with the end part of an output shaft of the motor reducer 232, and the cutterhead valve plate 244 is arranged along the axis of the cutterhead frame 243 and is inclined upwards by 15-45 degrees to meet the soil loading and unloading requirements of the down-the-hole power drill bit 21; the horizontal tooth bores 242 are uniformly and circumferentially provided with four along the axis of the cutter disc frame 243, the outer ends of the horizontal tooth bores 242 are exposed out of the cutter disc frame 243, the inner end parts of the horizontal tooth bores 242 are rotationally connected to the bottom of the cutter disc assembly 24, the horizontal tooth bores 242 sag due to gravity and rotate to the range below the cutter disc frame 243 when the down-the-hole power bit 21 is lifted, the whole lifting of the down-the-hole power bit 21 from the casing main body 3 is met, the horizontal tooth bores 242 are positioned at the horizontal position due to vertical pressure during rotary soil sampling operation to meet the soil body within the thickness range below the cutting casing main body 3, and the bottom resistance of the casing main body 3 is reduced.

The invention provides a construction process of a pile machine of a split combined type full pile casing, which comprises the following steps:

Step one, various preparation works before construction, including: the construction site is smooth, and the crawler belt 121 of the pile machine normally walks and the pile machine is parked in the construction area; temporary power distribution laying meets the construction electricity consumption requirement of the pile machine; preparing organized drainage; preparing materials and construction technology for safe bottoming; paying off and positioning the pile position;

Secondly, positioning the pile machine, centering, leveling and checking the perpendicularity of the pile frame body 14, and checking the perpendicularity of the pile frame body 14 in the whole pile hole forming process, wherein the deviation is corrected in time, so that the perpendicularity of the pile hole is ensured to meet the requirement;

Step three, assembling a first pile casing assembly 31 on the pile driver platform 11, after fixing in place, starting an upper hoop device 144 to press the first pile casing assembly 31 down to the ground, and brushing a lubricant on one side of the pile casing sheet 32 close to the soil before pressing in to reduce friction with the soil, or increasing the pile driver counterweight to resist the reaction force when the pile casing sheet 32 is pressed in by increasing the dead weight of the whole pile driver, so as to ensure that the pile casing sheet 32 is pressed in smoothly;

Step four, installing a punching grab bucket, punching grab soil, lifting the punching grab bucket to be higher than the upper opening of the pile casing main body 3 by the winch 133 after each time of punching grab soil is completed, starting the horizontal displacement hydraulic bidirectional jack 147 at the top of the pile frame body 14 to push the lifting beam 141 together with the punching grab bucket suspended by the traction steel wire rope 131 to the right front of the pile machine for soil unloading, and timely clearing and transporting earthwork; when the impact grab bucket cannot complete due to the situation that the impact grab bucket encounters a bay stone, a dead tree branch, other obstacles and the like, a circular cutting hammer and the like can be arranged on the impact grab bucket, and the obstacles are cleaned through hammering cutting; in the process of soil grabbing, starting an upper hoop device 144 to synchronously and alternately press the whole pile casing assembly 31 or the fragments into pile holes, assembling and pressing the next pile casing assembly 31 after each pile casing assembly 31 is pressed to the surface of the pile machine platform 11 until the specified depth of the pile holes is reached; the punching, grabbing and pile casing piece 32 pressing-in work can be synchronously performed, firstly, the pile casing piece 32 is pressed into a certain depth and then the soil is punched and grabbed, or firstly, the soil is grabbed into a certain depth and then the pile casing piece 32 is pressed, and the pile casing piece 32 is flexibly mastered according to geological conditions: when the soil is softer and easy to collapse, the water quantity is larger, the soil is firstly pressed into the pile casing piece 32 to a certain depth and then punched and grabbed, and when the soil is not in the conditions, the pile casing piece 32 is firstly punched and grabbed to a certain depth and then pressed into the pile casing piece 32, so that the soil and the pile casing piece 32 are smoothly punched and grabbed;

Step six, taking down the grab bucket and installing the down-hole power drill bit 21 to continue construction until all drilling is completed, the down-hole power drill bit 21 is lifted to the bottom of the hole by adopting a traction steel wire rope 131, a horizontal telescopic resistance rod 222 on a soil loading barrel 221 is started to control a power supply, the horizontal telescopic resistance rod 222 is inserted into a hole wall soil body, then a power supply of an underwater motor 233 is started to drill holes, a cutterhead assembly 24 completes drilling at about the height of the soil loading barrel under the action of the dead weight of the down-hole power drill bit 21, a winch 133 is started to lift a power drill assembly 23 through the traction steel wire rope 131, soil body drilled by the cutterhead assembly 24 is loaded into the soil loading barrel 221 along with the lifting of the power drill assembly 23, the winch 133 is suspended after the soil loading is completed, then the soil loading barrel 221 is retracted by the horizontal telescopic resistance rod 222, the winch 133 is continuously started after the horizontal telescopic resistance rod 222 is completely retracted, the down-hole power drill bit 21 is lifted to be higher than the top opening of a pile body 3 through the traction steel wire rope 131, and the down-hole power drill bit 21 is pushed forward by a horizontal displacement hydraulic bidirectional jack 147 suspended by the traction steel wire rope 131 to the front of the pile frame body 14 to the front of the pile machine for cleaning and transporting. After the down-the-hole power drill bit 21 drills to a certain depth, the pile casing sheet 32 is pressed into the pile hole in a slicing or multi-slice manner, the height of the soil loading barrel 221 is reserved with the hole bottom, and then the next drilling of the down-the-hole power drill bit 21 and the pressing of the pile casing sheet 32 are continued until all drilling is completed; in addition, the pile hole can meet the construction requirement without using the pile casing sheet 32 below the cohesive soil or plastic soil layer in the actual construction process, and the depth of the pile casing sheet 32 pressed in can be reduced according to the actual construction; the cutter head assembly 24 of the down-the-hole power drill bit 21 can be changed, and after the upper hole bottom reamer is installed, the pile bottom can be reamed, so that the bearing capacity of the pile foundation is greatly improved;

Hoisting a reinforcement cage, pouring underwater concrete, and synchronously slicing or extracting the pile casing pieces 32 with a poured concrete conduit in the pouring process until the concrete pouring is completed and the pile casing pieces 32 are completely extracted;

and step eight, removing the pile driver main body 1, curing the concrete, and shifting the pile driver main body 1 to the next pile hole for construction.

It should be understood that this example is only illustrative of the application and is not intended to limit the scope of the application. Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the teachings of the present application, and such equivalents are intended to fall within the scope of the application as defined in the appended claims.

Claims

1. The pile driver of the split combined type full pile casing comprises a movable pile driver main body (1), a drilling device (2) arranged on the pile driver main body (1) and used for drilling, and a casing main body (3) used for supporting the wall of a pile hole; the method is characterized in that: the pile casing main body (3) comprises a plurality of pile casing assemblies (31) which are vertically connected, the pile casing assemblies (31) comprise a plurality of arc pile casing pieces (32), the arc pile casing pieces (32) are sequentially connected end to form a cylindrical structure, and two upper and lower adjacent pile casing pieces (32) in the connected pile casing assemblies (31) are connected through a connecting clamping piece (33); the pile driver main body (1) comprises a pile driver frame body (14), wherein an upper hoop device (144) for pressing or pulling out the pile casing piece (32) into or from a pile hole and a lower hoop device (145) for positioning and stabilizing the pile casing piece (32) are further arranged on the pile driver frame body (14), a vertical displacement guide groove (146) is formed in the pile driver frame body (14), and the upper hoop device (144) can move up and down along the vertical displacement guide groove (146);

The left side of the pile casing piece (32) is provided with a first groove (321), the right side of the pile casing piece (32) is provided with a first lug (322) matched with the first groove (321), and two adjacent pile casing pieces (32) in the same pile casing assembly (31) are connected in a mode that the first lug (322) is inserted into the first groove (321); the upper side of the pile casing piece (32) is provided with a second groove (323), the lower side of the pile casing piece (32) is provided with a second lug (324) matched with the second groove (323), two upper and lower adjacent pile casing pieces (32) in the connected pile casing assembly (31) are connected in a mode that the second lug (324) is inserted in the second groove (323), the upper outer wall of the pile casing piece is provided with a fixing groove (325) in a shape of a Chinese character 'tu', the lower outer wall of the pile casing piece is provided with a fixing groove in a shape of a Chinese character 'tu', the fixing grooves of the upper and lower adjacent pile casing pieces are communicated, and an I-shaped connecting clamping piece (33) capable of connecting the two pile casing pieces is arranged in the fixing groove; the lower end face of the upper hoop device is fixedly provided with clamps with the same number as the pile casing pieces of each pile casing assembly through bolts, each clamp corresponds to a fixed groove on the outer wall above each pile casing piece, and when the pile casing pieces (32) are pulled up, the whole pile casing pieces (32) are pulled up together through connecting clamping pieces (33);

The pile driver main body (1) further comprises a pile driver platform (11), a crawler traveling part (12) arranged below the pile driver platform (11), a winch part (13) arranged above the pile driver platform (11) and a power distribution system (15), and the pile driver frame body (14) is arranged on the pile driver platform (11); one end of the traction steel wire rope (131) and one end of the cable (132) are connected with the winch part (13), and the other end of the traction steel wire rope bypasses the pile frame body (14) and the fixed pulley block (142) on the hanging beam (141) at the top of the pile frame body (14) and then is connected with the drilling device (2);

the top of the pile frame body (14) is provided with a horizontal displacement guide groove (143), and the lifting beam (141) drives the drilling device (2) to move left and right along the horizontal displacement guide groove (143) through a horizontal displacement hydraulic bidirectional jack (147) connected with two sides of the lifting beam (141);

The drilling device (2) comprises a grab bucket and a down-the-hole power drill bit (21), the down-the-hole power drill bit (21) comprises a power drill assembly (23), a cutter head assembly (24) and a soil barrel assembly (22), the power drill assembly (23) comprises a hanging bracket (231), a motor speed reducer (232) arranged on the hanging bracket (231) and an underwater motor (233) in transmission connection with the motor speed reducer (232), and the cutter head assembly (24) is in transmission connection with an output shaft of the motor speed reducer (232);

The soil loading barrel assembly (22) comprises a soil loading barrel (221) and a horizontal telescopic resistance rod (222) which is arranged on the soil loading barrel (221) and used for resisting the rotation counter force of the down-the-hole power drill bit (21), the soil loading barrel (221) is arranged between the hanging frame (231) and the cutter head assembly (24), the hanging frame (231) is provided with a vertical resistance rod (234), and the vertical resistance rod (234) is inserted into the soil loading barrel (221);

The cutter head assembly (24) consists of a cutter head frame (243), a cutter head valve plate (244), a vertical dental drill (241) for cutting soil downwards and a horizontal dental drill (242) for cutting soil in the range below the casing main body (3),

The cutter disc movable door plate is arranged along the axis of the cutter disc frame and is inclined upwards by 15-45 degrees, the horizontal dental drill (242) is rotatably connected to the cutter disc assembly (24), and when the down-the-hole power drill bit (21) is hung into a pile hole or lifted up by earth, the horizontal dental drill (242) rotates downwards due to dead weight.

2. The pile driver of a split combined full pile casing according to claim 1, wherein: the length of the pile casing piece (32) is 2-3m, the thickness of the pile casing piece is 30-40mm, and the arc length of the pile casing piece (32) is divided evenly according to the diameters and the circumferences of different piles.

3. A construction process of a pile machine adopting the split combined type full pile casing according to claim 1 or 2, characterized by comprising the following steps:

Secondly, positioning the pile machine, centering, leveling and checking the perpendicularity of the pile machine frame body (14);

step three, assembling the first pile casing assembly (31), and starting an upper hoop device (144) to press the first pile casing assembly (31) to the ground after the first pile casing assembly (31) is fixed in place;

step four, installing a punching grab bucket, punching and grabbing soil;

Step six, taking down the punching grab bucket and installing a down-the-hole power drill bit (21) to continue construction until all drilling holes are completed;

Hoisting a reinforcement cage, pouring underwater concrete, and synchronously slicing or multi-slice pulling out a pile casing slice (32) with a pouring concrete conduit in the pouring process;

And step eight, removing the pile driver main body (1) for concrete curing, and shifting the pile driver main body (1) to the next pile hole for construction.