CN113445497A - Hole forming process of full-casing full-slewing drilling machine - Google Patents
Hole forming process of full-casing full-slewing drilling machine Download PDFInfo
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- CN113445497A CN113445497A CN202010210381.1A CN202010210381A CN113445497A CN 113445497 A CN113445497 A CN 113445497A CN 202010210381 A CN202010210381 A CN 202010210381A CN 113445497 A CN113445497 A CN 113445497A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/06—Placing concrete under water
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
Abstract
The invention provides a hole forming process of a full-casing full-slewing drilling machine, which comprises the following process flows of: s1: manufacturing and installing a platform; s2: measuring and placing points; s3: positioning a full-slewing drilling machine; s4: manufacturing and installing a sleeve: s5: drilling and checking; s6: drilling and shifting: s7: construction of a steel bar shed: s8: manufacturing and installing a steel reinforcement cage and a detection pipe; s9: mounting a guide pipe and a hopper; s10: pouring underwater concrete; s11: pile foundation detection, namely adopting an ultrasonic detection method; s12: cutting the sleeve underwater; s13: and (5) finishing and clearing the field. The invention adopts the combination of the ordinary full-circle slewing drilling machine and the specially-made overhanging platform, effectively solves the difficult problem of hole forming of the high-overhanging deep-water anti-impact pile, greatly improves the construction progress and has obvious economic benefit; the structure which can not be subjected to excessive vibration is solved, so that the construction process that holes can only be formed on the structure manually is replaced; the problem that no construction operation platform exists at the top end of the structure can be solved, and the construction process of deepwater pile foundation hole forming can be solved.
Description
Technical Field
The invention mainly relates to the field of drilling machine hole forming, in particular to a hole forming process of a full-casing full-slewing drilling machine.
Background
The existing drilling machine has a pore-forming problem in the process of high-cantilever deep-water anti-impact piles, cannot be subjected to excessive vibration in construction, and does not have a construction operation platform at the top end of a structure, so that the construction progress is greatly reduced.
The published Chinese invention patent, application number CN201110215929.2, patent name: full sleeve pipe full slewing drilling machine, application date: 2011-07-30, the invention relates to a full-casing full-slewing drilling machine, relating to engineering machinery. The system comprises three parts, namely a power station, a working device and an auxiliary drilling tool. The power station is arranged externally, the working device comprises a base, a power supporting platform, an upright post, a lifting platform and a sleeve clamping device, and a supporting leg oil cylinder is arranged in the base for leveling. The drawing oil cylinder, the hydraulic motor, the gearbox, the clamping oil cylinder and the gear transmission device are main devices for transmitting power to the sleeve and driving the sleeve to rotate, ascend and descend. The auxiliary drilling tool comprises casings, grab buckets, multi-head grabs and the like with various specifications. The full-casing full-slewing drilling machine has four main actions of leveling, clamping, slewing, pressing and pulling. The engine in the power station drives a plurality of hydraulic pumps, and the hydraulic pumps are connected to the working device through hydraulic hoses to transmit power to corresponding actuating mechanisms.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a hole forming process of a full-casing full-slewing drilling machine, which comprises the following process flows of:
s1: manufacturing and installing a platform;
s2: measuring and placing points;
s3: positioning a full-slewing drilling machine: according to the measurement lofting, positioning a mechanical base, mounting the drilling machine on a base after the mechanical base is positioned, and adjusting an adjusting oil cylinder at the bottom of the drilling machine to enable a mechanical bottom plate to be in a horizontal state;
s4: manufacturing and installing a sleeve:
s4.1, rolling a sleeve by using a steel plate, wherein the thickness of the sleeve wall of a cutting boot is 4c when the bottom tube is 1.2m long, the thickness of a middle tube is 8m, and the steel sleeve is a movable joint;
s4.2, firstly, installing a bottom tube cutter;
s4.3, after the full-circle slewing drilling machine is in place, parallelly lifting a jaw of full-circle slewing equipment (synchronously lifting a lifting cylinder) to a higher position of about 400 mm, opening the jaw, vertically placing a first section of sleeve in the jaw of the full-circle slewing equipment by a crane, contracting the clamping cylinder, clamping the sleeve, connecting a second pipe by a movable joint in a hoisting manner, smearing butter on a water stopping groove of a male head before installation, installing a water stopping rubber ring, combining the male head and the female head, and smearing glass cement for water sealing treatment when installing a connecting bolt;
s4.4, measuring the verticality of the sleeve when the bottom pipe falls to the ground of the riverbed, and ensuring that the bottom pipe does not deviate; recording the length of the casing and measuring the elevation of the bottom of the casing so as to conveniently calculate the depth of the hole;
s5: drilling and checking;
s5.1, adjusting the whole-circle drilling machine to be vertical in the initial construction stage;
s5.2, entering the middle stage and the later stage of excavation, and pressing down again after the drilling machine is returned completely;
s5.3, when the pressing depth is about 2.5-3.5 m, taking soil from the sleeve by using a grab bucket, grabbing the soil while continuously pressing the sleeve, and always keeping the depth of the bottom opening of the sleeve, which is ahead of the excavation surface, less than or equal to 2.5m so as to ensure the verticality of the sleeve;
s6: drilling and shifting:
after the final hole inspection and acceptance passes, welding and reinforcing the sleeve and the steel platform by using a steel plate, cutting the steel sleeve above the top of the platform after reinforcement, and hoisting the redundant part away to enable the drilling machine to move;
s7: construction of a steel bar shed:
manufacturing a jig frame by adopting a steel structure, a hardened ground and section steel;
s8: manufacturing and installing a steel reinforcement cage and a detection pipe;
s8.1. manufacturing process of reinforcement cage
Firstly, cutting qualified raw materials according to a drawing → processing reinforcing steel bars → tapping (welding) → assembling a reinforcing cage → assembling a detection pipe → checking and accepting production
S8.2, installation process of reinforcement cage
Transporting the qualified reinforcement cage to the site → placing the hoisting equipment → hoisting the reinforcement cage → slowly placing the reinforcement cage in the hole → connecting the reinforcement cage → checking the point position → fixing the reinforcement cage
S9: mounting of conduits and hoppers
S9.1: before the main installation of the conduit, a sealing experiment should be carried out, 70% of water is filled into the assembled conduit, two ends of the conduit are sealed, one end of the conduit is welded with an air delivery pipe joint, calculated air pressure is input, the conduit needs to roll for a plurality of times, and the conduit is qualified after no water leakage after 15 min. The length of the closed experiment conduit is larger than the depth of the hole, and the water pressure in the closed experiment conduit is 1.3 times larger than that in the hole;
s9.2: the hopper is installed by adopting a steel rope, the guide pipe is installed by connecting one section of the hopper with one section of the hopper, and the distance between the bottom of the guide pipe and the bottom of the pile foundation meets the requirement of construction specification. The depth of the water in the hole is required to meet the underwater concrete pouring requirement;
s10: pouring underwater concrete;
s10.1: cover ball valve under hopper before pouring
S10.2: measuring the height of concrete surface by using measuring hammer, at least measuring 2 points by using measuring hammer under the middle position of guide pipe and steel reinforcement cage, then taking its average value and recording it into pouring record table
S10.3, the guide pipe is lifted up and down continuously during pouring, and cannot be pulled out, so that cavities and the outer side of the steel cage, where concrete cannot flow, caused by too high speed are prevented;
s10.4, lifting the guide pipe can not be too fast and too violent to prevent the invasion of floating slurry and sludge caused by dragging surface concrete or hang a reinforcement cage;
s10.5, the interval time of concrete turning of each vehicle during pile foundation concrete pouring is required to meet the regulation of the specification, and the phenomena of pile breakage and cold construction joints are avoided.
S11: pile foundation detection, namely adopting an ultrasonic detection method;
s12: cutting the sleeve underwater;
s13: and (5) finishing and clearing the field.
Preferably, the sleeve is made of a steel plate with the thickness of Q345B being 2.5 cm.
Preferably, in the step S5, when the water sealing effect in the pipe is poor in the initial stage of drilling, the grab bucket is used to discharge slag slowly, and the drilling speed is relatively slowed at this stage, so that excessive drilling slag in the casing pipe is avoided, and the friction force is increased;
when the water sealing effect is better after the drilling exceeds about 10 meters, the water in the pipe is washed out as much as possible, so that the slag is conveniently and quickly removed, and the drilling speed is improved;
when the intensity of the underground rock stratum is high, the rock in the sleeve needs to be broken by using a hammer, so that the grab bucket can conveniently discharge the slag.
Preferably, in the step S8, a three-point hoisting mode is adopted for hoisting the steel reinforcement cage, a large hook is hoisted to one point, and the center and the bottom of the small hook are hoisted to two points; the hoisting is that a large hook and a small hook are hoisted simultaneously; when the distance between the reinforcement cage and the ground is more than 3 meters, the small hook is fixed, the big hook lifts the hook to gradually stand the reinforcement cage, slowly translates to the optimal position of the orifice, and slowly puts the reinforcement cage into the orifice.
Preferably, in the step S10, the following requirements are required for the underwater concrete:
(1) providing a continuous supply of concrete of at least 100m3/h from the mixing station, pumping to the orifice for pouring;
(2) the concrete has good workability, and has no obvious segregation and bleeding phenomenon in the conveying and pouring process;
(3) the concrete should keep enough fluidity, the slump must meet the pouring requirement of the underwater concrete, the slump loss value of this project is controlled in 180-220 mm, the concrete that does not meet the standard must not pour into the hole; and (3) measurement and control of concrete slump: sampling and slump measuring are carried out in time once/per pile during normal pouring and when obvious abnormality occurs;
(4) after the first batch of concrete falls down, the concrete should be continuously poured;
(5) manufacturing a concrete test block: 2 groups per pile.
Preferably, in step S10, the requirement for the buried depth of the conduit is: in underwater concrete pouring operation, the minimum buried depth of a guide pipe is always strictly controlled to ensure the continuity and uniformity of pile body concrete and prevent pile breakage; the requirements for pile grouting are as follows: the minimum buried depth of the conduit is not less than 2 meters, and the maximum buried depth of the conduit is not more than 6 meters.
Preferably, in the step S12, before the water bottom is cut, the section steel for the hangers is placed above the casing, after the section steel is accurately centered, the hangers and the casing are welded into a whole by using a steel plate, the connection between the casing and the overhanging platform is removed, the position of underwater cutting is measured according to the set value, the hangers and the casing are lifted out by using a crane through the reserved hoisting holes of the hangers after the cutting, and the casing is returned to the factory for further use after the separation.
The invention has the beneficial effects that:
(1) the common full-circle slewing drilling machine is combined with the specially-made overhanging platform, so that the difficult problem of hole forming of the high-overhanging deep-water anti-impact pile is effectively solved, the construction progress is greatly improved, and the obvious economic benefit is achieved;
(2) the structure which can not be subjected to excessive vibration is solved, so that the construction process that holes can only be formed on the structure manually is replaced;
(3) the problem that no construction operation platform exists at the top end of the structure can be solved, and the construction process of deepwater pile foundation hole forming can be solved.
Drawings
FIG. 1 is a block diagram of the present invention;
Detailed Description
In order to make the technical solutions of the present invention better understood and make the above features, objects, and advantages of the present invention more comprehensible, the present invention is further described with reference to the following examples. The examples are intended to illustrate the invention only and are not intended to limit the scope of the invention.
As shown in fig. 1, the present invention includes: the following process flow is as follows:
s1: manufacturing and installing a platform;
s2: measuring and placing points;
s3: positioning a full-slewing drilling machine: according to the measurement lofting, positioning a mechanical base, mounting the drilling machine on a base after the mechanical base is positioned, and adjusting an adjusting oil cylinder at the bottom of the drilling machine to enable a mechanical bottom plate to be in a horizontal state;
s4: manufacturing and installing a sleeve:
s4.1, rolling a sleeve by using a steel plate, wherein the thickness of the sleeve wall of a cutting boot is 4c when the bottom tube is 1.2m long, the thickness of a middle tube is 8m, and the steel sleeve is a movable joint;
s4.2, firstly, installing a bottom tube cutter;
s4.3, after the full-circle slewing drilling machine is in place, parallelly lifting a jaw of full-circle slewing equipment (synchronously lifting a lifting cylinder) to a higher position of about 400 mm, opening the jaw, vertically placing a first section of sleeve in the jaw of the full-circle slewing equipment by a crane, contracting the clamping cylinder, clamping the sleeve, connecting a second pipe by a movable joint in a hoisting manner, smearing butter on a water stopping groove of a male head before installation, installing a water stopping rubber ring, combining the male head and the female head, and smearing glass cement for water sealing treatment when installing a connecting bolt;
s4.4, measuring the verticality of the sleeve when the bottom pipe falls to the ground of the riverbed, and ensuring that the bottom pipe does not deviate; recording the length of the casing and measuring the elevation of the bottom of the casing so as to conveniently calculate the depth of the hole;
s5: drilling and checking;
s5.1, adjusting the whole-circle drilling machine to be vertical in the initial construction stage;
s5.2, entering the middle stage and the later stage of excavation, and pressing down again after the drilling machine is returned completely;
s5.3, when the pressing depth is about 2.5-3.5 m, taking soil from the sleeve by using a grab bucket, grabbing the soil while continuously pressing the sleeve, and always keeping the depth of the bottom opening of the sleeve, which is ahead of the excavation surface, less than or equal to 2.5m so as to ensure the verticality of the sleeve;
s6: drilling and shifting:
after the final hole inspection and acceptance passes, welding and reinforcing the sleeve and the steel platform by using a steel plate, cutting the steel sleeve above the top of the platform after reinforcement, and hoisting the redundant part away to enable the drilling machine to move;
s7: construction of a steel bar shed:
manufacturing a jig frame by adopting a steel structure, a hardened ground and section steel;
s8: manufacturing and installing a steel reinforcement cage and a detection pipe;
s8.1. manufacturing process of reinforcement cage
Firstly, cutting qualified raw materials according to a drawing → processing reinforcing steel bars → tapping (welding) → assembling a reinforcing cage → assembling a detection pipe → checking and accepting production
S8.2, installation process of reinforcement cage
Transporting the qualified reinforcement cage to the site → placing the hoisting equipment → hoisting the reinforcement cage → slowly placing the reinforcement cage in the hole → connecting the reinforcement cage → checking the point position → fixing the reinforcement cage
S9: mounting of conduits and hoppers
S9.1: before the main installation of the conduit, a sealing experiment should be carried out, 70% of water is filled into the assembled conduit, two ends of the conduit are sealed, one end of the conduit is welded with an air delivery pipe joint, calculated air pressure is input, the conduit needs to roll for a plurality of times, and the conduit is qualified after no water leakage after 15 min. The length of the closed experiment conduit is larger than the depth of the hole, and the water pressure in the closed experiment conduit is 1.3 times larger than that in the hole;
s9.2: the hopper is installed by adopting a steel rope, the guide pipe is installed by connecting one section of the hopper with one section of the hopper, and the distance between the bottom of the guide pipe and the bottom of the pile foundation meets the requirement of construction specification. The depth of the water in the hole is required to meet the underwater concrete pouring requirement;
s10: pouring underwater concrete;
s10.1: cover ball valve under hopper before pouring
S10.2: measuring the height of concrete surface by using measuring hammer, at least measuring 2 points by using measuring hammer under the middle position of guide pipe and steel reinforcement cage, then taking its average value and recording it into pouring record table
S10.3, the guide pipe is lifted up and down continuously during pouring, and cannot be pulled out, so that cavities and the outer side of the steel cage, where concrete cannot flow, caused by too high speed are prevented;
s10.4, lifting the guide pipe can not be too fast and too violent to prevent the invasion of floating slurry and sludge caused by dragging surface concrete or hang a reinforcement cage;
s10.5, the interval time of concrete turning of each vehicle during pile foundation concrete pouring is required to meet the regulation of the specification, and the phenomena of pile breakage and cold construction joints are avoided.
S11: pile foundation detection, namely adopting an ultrasonic detection method;
s12: cutting the sleeve underwater;
s13: and (5) finishing and clearing the field.
In the present embodiment, the sleeve is preferably made of a 2.5cm thick steel plate of Q345B.
Preferably, in the step S5, when the water sealing effect in the pipe is poor in the initial stage of drilling, the grab bucket is used to discharge slag slowly, and the drilling speed is relatively slowed at this stage, so as to avoid excessive drilling slag in the casing pipe and increase the friction force;
when the water sealing effect is better after the drilling exceeds about 10 meters, the water in the pipe is washed out as much as possible, so that the slag is conveniently and quickly removed, and the drilling speed is improved;
when the intensity of the underground rock stratum is high, the rock in the sleeve needs to be broken by using a hammer, so that the grab bucket can conveniently discharge the slag.
Preferably, in the step S8, a three-point hoisting mode is adopted for hoisting the reinforcement cage, wherein the large hook is hoisted to one point, and the small hook is hoisted to two points, namely the center and the bottom of the cage; the hoisting is that a large hook and a small hook are hoisted simultaneously; when the distance between the reinforcement cage and the ground is more than 3 meters, the small hook is fixed, the big hook lifts the hook to gradually stand the reinforcement cage, slowly translates to the optimal position of the orifice, and slowly puts the reinforcement cage into the orifice.
In the present embodiment, preferably, in step S10, the following requirements are made for the underwater concrete:
(1) providing a continuous supply of concrete of at least 100m3/h from the mixing station, pumping to the orifice for pouring;
(2) the concrete has good workability, and has no obvious segregation and bleeding phenomenon in the conveying and pouring process;
(3) the concrete should keep enough fluidity, the slump must meet the pouring requirement of the underwater concrete, the slump loss value of this project is controlled in 180-220 mm, the concrete that does not meet the standard must not pour into the hole; and (3) measurement and control of concrete slump: sampling and slump measuring are carried out in time once/per pile during normal pouring and when obvious abnormality occurs;
(4) after the first batch of concrete falls down, the concrete should be continuously poured;
(5) manufacturing a concrete test block: 2 groups per pile.
In this embodiment, preferably, in step S10, the requirement for the buried depth of the conduit is: in underwater concrete pouring operation, the minimum buried depth of a guide pipe is always strictly controlled to ensure the continuity and uniformity of pile body concrete and prevent pile breakage; the requirements for pile grouting are as follows: the minimum buried depth of the conduit is not less than 2 meters, and the maximum buried depth of the conduit is not more than 6 meters.
Preferably, in the step S12, before the water bottom is cut, the section steel for the hangers is placed above the casing, after the section steel is accurately centered, the hangers and the casing are welded into a whole by using a steel plate, the connection between the casing and the cantilever platform is removed, the hangers and the casing are lifted out by using a crane through the reserved hoisting holes of the hangers after the underwater cutting is performed according to the set position of the underwater cutting, and the casing is returned to the factory for further use after being separated.
In use,
in this embodiment, it is preferable.
The above-mentioned structure is provided.
In this embodiment, it is preferable.
The above-mentioned structure is provided.
In this embodiment, it is preferable.
The above-mentioned structure is provided.
In this embodiment, it is preferable.
The above-mentioned structure is provided.
In this embodiment, it is preferable.
The above-mentioned structure is provided.
In this embodiment, it is preferable.
The above-mentioned structure is provided.
Due to the fact that
The above-described embodiments are merely illustrative of the principles and utilities of the present patent application and are not intended to limit the present patent application. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of this patent application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of this patent application.
Claims (7)
1. A hole forming process of a full-casing full-slewing drilling machine is characterized by comprising the following process flows of:
s1: manufacturing and installing a platform;
s2: measuring and placing points;
s3: positioning a full-slewing drilling machine: according to the measurement lofting, positioning a mechanical base, mounting the drilling machine on a base after the mechanical base is positioned, and adjusting an adjusting oil cylinder at the bottom of the drilling machine to enable a mechanical bottom plate to be in a horizontal state;
s4: manufacturing and installing a sleeve:
s4.1, rolling a sleeve by using a steel plate, wherein the thickness of the sleeve wall of a cutting boot is 4c when the bottom tube is 1.2m long, the thickness of a middle tube is 8m, and the steel sleeve is a movable joint;
s4.2, firstly, installing a bottom tube cutter;
s4.3, after the full-circle slewing drilling machine is in place, parallelly lifting a jaw of full-circle slewing equipment (synchronously lifting a lifting cylinder) to a higher position of about 400 mm, opening the jaw, vertically placing a first section of sleeve in the jaw of the full-circle slewing equipment by a crane, contracting the clamping cylinder, clamping the sleeve, connecting a second pipe by a movable joint in a hoisting manner, smearing butter on a water stopping groove of a male head before installation, installing a water stopping rubber ring, combining the male head and the female head, and smearing glass cement for water sealing treatment when installing a connecting bolt;
s4.4, measuring the verticality of the sleeve when the bottom pipe falls to the ground of the riverbed, and ensuring that the bottom pipe does not deviate; recording the length of the casing and measuring the elevation of the bottom of the casing so as to conveniently calculate the depth of the hole;
s5: drilling and checking;
s5.1, adjusting the whole-circle drilling machine to be vertical in the initial construction stage;
s5.2, entering the middle stage and the later stage of excavation, and pressing down again after the drilling machine is returned completely;
s5.3, when the pressing depth is about 2.5-3.5 m, taking soil from the sleeve by using a grab bucket, grabbing the soil while continuously pressing the sleeve, and always keeping the depth of the bottom opening of the sleeve, which is ahead of the excavation surface, less than or equal to 2.5m so as to ensure the verticality of the sleeve;
s6: drilling and shifting:
after the final hole inspection and acceptance passes, welding and reinforcing the sleeve and the steel platform by using a steel plate, cutting the steel sleeve above the top of the platform after reinforcement, and hoisting the redundant part away to enable the drilling machine to move;
s7: construction of a steel bar shed:
manufacturing a jig frame by adopting a steel structure, a hardened ground and section steel;
s8: manufacturing and installing a steel reinforcement cage and a detection pipe;
s8.1. manufacturing process of reinforcement cage
Firstly, cutting qualified raw materials according to a drawing → processing reinforcing steel bars → tapping (welding) → assembling a reinforcing cage → assembling a detection pipe → checking and accepting production
S8.2, installation process of reinforcement cage
Transporting the qualified reinforcement cage to the site → placing the hoisting equipment → hoisting the reinforcement cage → slowly placing the reinforcement cage in the hole → connecting the reinforcement cage → checking the point position → fixing the reinforcement cage
S9: mounting of conduits and hoppers
S9.1: before the main installation of the conduit, a sealing experiment should be carried out, 70% of water is filled into the assembled conduit, two ends of the conduit are sealed, one end of the conduit is welded with an air delivery pipe joint, calculated air pressure is input, the conduit needs to roll for a plurality of times, and the conduit is qualified after no water leakage after 15 min. The length of the closed experiment conduit is larger than the depth of the hole, and the water pressure in the closed experiment conduit is 1.3 times larger than that in the hole;
s9.2: the hopper is installed by adopting a steel rope, the guide pipe is installed by connecting one section of the hopper with one section of the hopper, and the distance between the bottom of the guide pipe and the bottom of the pile foundation meets the requirement of construction specification. The depth of the water in the hole is required to meet the underwater concrete pouring requirement;
s10: pouring underwater concrete;
s10.1: cover ball valve under hopper before pouring
S10.2: adopting a measuring hammer to measure the height of the concrete surface, during measurement, placing the measuring hammer below the middle part of the guide pipe and the steel reinforcement cage, measuring at least 2 points, then taking the average value, and recording the average value into a pouring record table S10.3, wherein the guide pipe is required to be lifted up and down continuously during pouring, and the guide pipe cannot be pulled out so as to prevent cavities and the outer side of the steel reinforcement cage from being incapable of flowing due to overhigh speed;
s10.4, lifting the guide pipe can not be too fast and too violent to prevent the invasion of floating slurry and sludge caused by dragging surface concrete or hang a reinforcement cage;
s10.5, the interval time of concrete turning of each vehicle during pile foundation concrete pouring is required to meet the regulation of the specification, and the phenomena of pile breakage and cold construction joints are avoided.
S11: pile foundation detection, namely adopting an ultrasonic detection method;
s12: cutting the sleeve underwater;
s13: and (5) finishing and clearing the field.
2. The full casing full slewing drilling machine hole forming process according to claim 1, characterized in that: the sleeve is made of a Q345B steel plate with the thickness of 2.5 cm.
3. The full casing full slewing drilling machine hole forming process according to claim 2, characterized in that: in the step S5, when the water sealing effect in the pipe is poor in the initial stage of drilling, the grab bucket is used for discharging slag slowly, the drilling speed is relatively slowed down in the stage, excessive drilling slag in the sleeve is avoided, and the friction force is increased; when the water sealing effect is better after the drilling exceeds about 10 meters, the water in the pipe is washed out as much as possible, so that the slag is conveniently and quickly removed, and the drilling speed is improved;
when the intensity of the underground rock stratum is high, the rock in the sleeve needs to be broken by using a hammer, so that the grab bucket can conveniently discharge the slag.
4. The full casing full slewing drilling machine hole forming process according to claim 3, wherein: in the step S8, hoisting the reinforcement cage by adopting a three-point hoisting mode, wherein a large hook is hoisted to one point, and the center and the bottom of the small hook are hoisted to two points; the hoisting is that a large hook and a small hook are hoisted simultaneously; when the distance between the reinforcement cage and the ground is more than 3 meters, the small hook is fixed, the big hook lifts the hook to gradually stand the reinforcement cage, slowly translates to the optimal position of the orifice, and slowly puts the reinforcement cage into the orifice.
5. The full casing full slewing drilling machine hole forming process according to claim 4, wherein the hole forming process comprises the following steps: in the step S10, the requirements for the underwater concrete are:
(1) providing a continuous supply of concrete of at least 100m3/h from the mixing station, pumping to the orifice for pouring;
(2) the concrete has good workability, and has no obvious segregation and bleeding phenomenon in the conveying and pouring process;
(3) the concrete should keep enough fluidity, the slump must meet the pouring requirement of the underwater concrete, the slump loss value of this project is controlled in 180-220 mm, the concrete that does not meet the standard must not pour into the hole; and (3) measurement and control of concrete slump: sampling and slump measuring are carried out in time once/per pile during normal pouring and when obvious abnormality occurs;
(4) after the first batch of concrete falls down, the concrete should be continuously poured;
(5) manufacturing a concrete test block: 2 groups per pile.
6. The full casing full slewing drilling machine hole forming process according to claim 5, wherein: in the step S10, the requirement for the depth of the conduit: in underwater concrete pouring operation, the minimum buried depth of a guide pipe is always strictly controlled to ensure the continuity and uniformity of pile body concrete and prevent pile breakage;
the requirements for pile grouting are as follows: the minimum buried depth of the conduit is not less than 2 meters, and the maximum buried depth of the conduit is not more than 6 meters.
7. The full casing full slewing drilling machine hole forming process according to claim 6, wherein: and S12, before cutting the water bottom, placing the section steel for the hangers above the sleeve, after accurate centering, welding the hangers and the sleeve into a whole by using a steel plate, removing the connection between the sleeve and the cantilever platform, measuring the position of the underwater cutting according to the set value, lifting the hangers and the sleeve out by using a crane through a reserved lifting hole of the hangers after cutting, and returning the sleeve to a factory after separation for reprocessing and continuing use.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010210381.1A CN113445497A (en) | 2020-03-24 | 2020-03-24 | Hole forming process of full-casing full-slewing drilling machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010210381.1A CN113445497A (en) | 2020-03-24 | 2020-03-24 | Hole forming process of full-casing full-slewing drilling machine |
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| CN113445497A true CN113445497A (en) | 2021-09-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114277781A (en) * | 2021-11-30 | 2022-04-05 | 山东省公路桥梁建设集团有限公司 | Karst area pile foundation pore-forming construction method |
| CN114837209A (en) * | 2022-05-19 | 2022-08-02 | 中铁三局集团第二工程有限公司 | Construction method of deep sand layer large-diameter pile foundation in karst development area |
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| CN109056709A (en) * | 2018-08-22 | 2018-12-21 | 中铁二十二局集团有限公司 | A method of using full-sleeve hydraulic drill rig construction In Karst Areas For Bridge pile foundation |
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| CN110629747A (en) * | 2019-09-21 | 2019-12-31 | 中铁二十局集团第六工程有限公司 | Full-casing full-rotation construction process for pile foundation under complex geological conditions |
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| CN105887813A (en) * | 2016-05-07 | 2016-08-24 | 深圳市宏业基基础工程有限公司 | Large-diameter super-long pile construction method in karst area through full-casing pipe full rotating and rotary drilling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114277781A (en) * | 2021-11-30 | 2022-04-05 | 山东省公路桥梁建设集团有限公司 | Karst area pile foundation pore-forming construction method |
| CN114837209A (en) * | 2022-05-19 | 2022-08-02 | 中铁三局集团第二工程有限公司 | Construction method of deep sand layer large-diameter pile foundation in karst development area |
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