CN116971379A - Pile splicing method for static pressure piles - Google Patents

Abstract

The application relates to the technical field of constructional engineering, in particular to a pile splicing method of a static pressure pile, which comprises the following steps: pile extension and welding: stopping pressing the pile when the pile head of the lower section pile is at a preset distance from the ground, and performing welding pile splicing, wherein the welding pile splicing process is controlled within a preset time; wherein weld pile splicing comprises: before welding pile, cleaning the welding surfaces of two sections of pipe piles; when pile extension is carried out, the axes of the upper section pile and the lower section pile are consistent, and the dislocation deviation is smaller than a preset dislocation deviation value; installing a guide hoop on the pile head of the lower section pile during pile extension to guide the upper section pile to be in place, and tightly attaching the welding surfaces of the upper section pile and the lower section pile; checking the pile extension, and if the pile extension is qualified, performing positioning spot welding; dismantling the guide hoop and carrying out symmetrical layered welding; carrying out windproof treatment during welding; after welding, performing quality inspection on the welding, and performing beating after cooling the welding for a preset time if the welding is qualified. According to the scheme, risks affecting welding quality are managed and controlled in the welding process, and welding quality can be improved.

Description

Pile splicing method for static pressure piles

Technical Field

The application relates to the technical field of constructional engineering, in particular to a pile splicing method of a static pressure pile.

Background

Static pile is a method for construction of engineering pile foundation, and the static pile method is a pile sinking technology for pressing precast pile into soil by using pile pressing mechanism of static pile pressing machine and providing counter force by self weight of pile pressing machine and counter weight on machine frame.

The static pile method construction process comprises a plurality of steps, such as: measuring pile positions, positioning a pile machine, hoisting piles and inserting piles, pressing piles, pile splicing and welding, pile conveying, pile final pressure control and the like; the pile extension and welding are to weld two sections of pipe piles, the welding quality of the upper section of pile and the lower section of pile affects the construction quality of the whole static pile method, so that the pile extension and welding are very important, the existing pile extension and welding are only to weld the upper section of pile and the lower section of pile, the risk affecting the welding quality is not managed and controlled in the welding process, and the welding quality is lower.

Disclosure of Invention

The application aims to provide a pile splicing method for static pressure piles, which is used for controlling risks affecting welding quality in a welding process and improving the welding quality.

The application provides the following basic scheme: the pile splicing method of the static pressure pile comprises the following steps:

pile extension and welding: stopping pressing the pile when the pile head of the lower section pile is at a preset distance from the ground, and performing welding pile splicing, wherein the welding pile splicing process is controlled within a preset time;

wherein weld pile splicing comprises:

before welding pile, cleaning the welding surfaces of two sections of pipe piles;

when pile extension is carried out, the axes of the upper section pile and the lower section pile are consistent, and the dislocation deviation is smaller than a preset dislocation deviation value;

when pile extension is carried out, a guide hoop can be arranged on the pile head of the lower pile to guide the upper pile to be in place, and the welding surfaces of the upper pile and the lower pile are tightly attached;

checking the pile extension, and if the pile extension is qualified, performing positioning spot welding;

dismantling the guide hoop and carrying out symmetrical layered welding;

carrying out windproof treatment during welding;

after welding is finished, performing quality inspection on the welding, and performing beating after welding is cooled for a preset time if the quality inspection is qualified; the quality inspection is carried out, whether the inspection is qualified or not is judged according to whether the current welding condition meets the preset welding requirement or not, if yes, the inspection is qualified, and if not, the inspection is unqualified; the preset welding requirements are as follows: each joint weld joint is not less than two layers, each layer of weld joint is staggered, the thickness of the weld joint is 8mm, the shortest distance from the root of a weld groove to the surface of the weld joint is not less than 12mm, and the thickness of an end plate is not less than 16mm.

Further, the windproof treatment comprises: one or more of building a windbreak and using a hood.

Further, before pile extension and welding, the method further comprises:

pile position measurement and placement: discharging the pile position according to a preset measurement control point and the pile position coordinate by adopting a total station, and marking the pile position;

and (3) positioning a pile machine: according to the marked pile position, the pile machine moves to be in position and rechecks the pile position;

hanging piles and inserting piles: selecting each pile length and pile pressing sequence according to the set pile length of each pile position, numbering, and setting the pile length of the last pile not smaller than the preset effective pile length; the pile machine is hoisted in place according to the serial numbers in sequence, the pile inserting holes of the positioning points are aligned and measured, the pile inserting is stopped to press the pile after the pile inserting is carried out in soil for presetting the pile inserting depth, and verticality adjustment is carried out;

pile pressing: the pile machine vertically presses the pipe pile into the soil, two theodolites are adopted to bidirectionally control the verticality of the pipe pile in the pile pressing process, the pressure and the depth of the pile pressing are monitored, and the pile machine gradually increases the control pressure according to the sinking amount and the pile sinking speed of the pipe pile; if any preset pile pressing stopping condition is met, pile pressing stopping is carried out, wherein the preset pile pressing stopping condition comprises the following steps: the pile length reaches the shortest effective pile length and the pile final pressure reaches the preset setting requirement.

Further, the method further comprises the following steps: pile feeding: pile feeding is performed to a preset depth according to a design drawing and the actual situation of the site;

pile final pressure control: according to the design drawing and the preset requirement, the pile final pressure value is greater than or equal to the preset pile final pressure value, the final pressure times are preset final pressure times, and the pressure stabilizing time of each time is not less than the preset pressure stabilizing time; if the pile length reaches the shortest effective pile length and the pile end pressure reaches the preset setting requirement, the pile end pressure reaches the preset setting requirement as follows: the pile final pressure value is larger than or equal to the preset pile final pressure value, the final pressure times are preset final pressure times, and the pressure stabilizing time of each time is not smaller than the preset pressure stabilizing time, so that pile final pressure control is completed;

recording and detecting: recording pile length, operation time and process of each step in pile sinking process, and generating pile sinking record; and judging whether construction abnormality exists according to the pile sinking record, and reporting if the construction abnormality exists.

Further, the method further comprises the following steps: pile machine pile detection: and according to the measurement positioning points, the steel pipes with the same diameter are pressed through surface soil by a static pile pressing machine.

Further, the perpendicularity of the pile inserted in the pile insertion and pile pressing is required to be less than or equal to 0.5%.

Further, the method further comprises the following steps: pile cutting;

pile cutting: determining pile head height: according to the preset test requirement, reserving a preset length for the tubular pile, marking the tubular pile by using a height mark, and then performing pile cutting treatment;

cutting the periphery of the pile by a toothless saw according to the height mark;

checking the height mark, and if the height mark is checked to be qualified, cutting the tubular pile at one time;

cleaning the pile head, wherein the flatness height difference of the pile head is smaller than or equal to the preset flatness height difference.

Further, the stub further comprises: after the pile head height is determined, the pile body end part which does not need to be cut off is held tightly by a hoop, and a groove is chiseled along the periphery of the upper edge of the hoop.

Further, the stub further comprises: after the pile head height is determined, judging whether the pile head height is larger than the preset pile head height, if so, carrying out sectional pile cutting treatment, fixing the pile head firmly by using a steel wire rope before sectional pile cutting, and carrying out sectional pile cutting after the crane is hung firmly.

Further, the method further comprises the following steps: reinforcing pile heads;

pile head reinforcement: the pile head after pile cutting is sleeved with end plates of the same specification, the exposed main ribs are welded firmly on screw holes of the end plates one by one, the bottom surface of the end plates is higher than the concrete surface of the pile head by 1-2cm and is horizontal, a matched special lower tray is arranged in an inner cavity of the pipe pile, hanging legs of the tray are welded firmly on the inner periphery of the end plates, and the hanging height of the tray is determined according to the damage condition of the pile head;

the lower opening of the pile cap hoop and the pile body contact ring are subjected to leakage-stopping treatment.

The beneficial effect of this scheme: in the pile extension and welding process, the welding pile extension process is controlled within the preset time, so that the pile pressing difficulty caused by overlong dead time is avoided; before welding pile, cleaning the welding surfaces of the two sections of pipe piles to prevent the welding quality from being influenced by the dirt of the welding surfaces; when pile extension is carried out, the axes of an upper pile section (a new pile extension section) and a lower pile section (an original pile section) are consistent, the dislocation deviation is smaller than a preset dislocation deviation value, the preset dislocation deviation value is 2mm generally, and the alignment of the upper pile section and the lower pile section is ensured; when pile extension is carried out, a guide hoop can be arranged on the pile head of the lower pile section to guide the upper pile section to be in place, the welding surfaces of the upper pile section and the lower pile section are tightly attached, gaps cannot be formed at joints, and sundries such as iron sheets, iron wires and the like are prevented from being stuffed in the joint gaps; checking the pile extension, and if the pile extension is qualified, performing positioning spot welding so as to preliminarily fix the upper section pile and the lower section pile and prevent the upper section pipe pile and the lower section pipe pile from relatively moving during subsequent welding; after positioning spot welding, removing the guide hoops, and carrying out symmetrical layered welding; during welding, windproof treatment is carried out, so that welding deformation is reduced, the welding seams are continuous and full, and the specified welding seam length is ensured; after welding is finished, performing quality inspection on the welding, and if the welding is qualified, performing beating after the welding is cooled for a preset time, so as to prevent the welding from being damaged when the welding is not cooled; the quality inspection is carried out, whether the inspection is qualified or not is judged according to whether the current welding condition meets the preset welding requirement or not, if yes, the inspection is qualified, and if not, the inspection is unqualified; the preset welding requirements are as follows: each joint weld joint is not less than two layers, each layer of weld joint is staggered, the thickness of the weld joint is 8mm, the shortest distance from the root of a weld groove to the surface of the weld joint is not less than 12mm, and the thickness of an end plate is not less than 16mm.

In the whole pile extension and welding process, the risk affecting the welding quality is comprehensively controlled, the influence of various risks on the welding quality is reduced, and the welding quality is improved.

In addition, the static pile pressing method construction can effectively prevent rebound and uplink after pile pressing, improve the bearing capacity of the pile, reduce the actual consumption of the pile and then reduce the pile distribution coefficient; and the construction period is short and the noise is low.

Drawings

FIG. 1 is a schematic flow chart of an embodiment of a static pile extension method of the present application;

FIG. 2 is a schematic diagram of an image in an embodiment of a static pile extension method according to the present application;

FIG. 3 is a schematic diagram of an image creation coordinate system in an embodiment of a static pile extension method of the present application;

FIG. 4 is a second schematic view of an image in an embodiment of the static pile extension method of the present application;

FIG. 5 is a third schematic view of an image in an embodiment of a static staking method of the present application;

FIG. 6 is a schematic diagram of an image in an embodiment of a static staking method of the present application;

FIG. 7 is a schematic diagram of an image in an embodiment of a static staking method of the present application;

fig. 8 is a schematic diagram of an image in an embodiment of the static pile extension method of the present application.

Fig. 9 is a schematic diagram seven of an image in an embodiment of the static pile extension method of the present application.

Detailed Description

The following is a further detailed description of the embodiments:

reference numerals in the drawings of the specification include: and (3) the pipe pile 1.

In the description of the present application, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" means two or more, unless specified or indicated otherwise; the terms "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, it should be understood that the terms "upper", "lower", "left", "right" and the like in the embodiments of the present application are described in terms of angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in the context of a description, it will be understood that when an element is referred to as being "on," "under," "left" or "right" another element, it can be directly connected to the other element or intervening elements may be present.

Example 1

An example is substantially as shown in figure 1: the static pile splicing method comprises the following steps:

pile position measurement and placement:

discharging the pile position according to a preset measurement control point and the pile position coordinate by adopting a total station, and marking the pile position; specifically, in this embodiment, marking pile positions includes: inserting phi 8 steel bars into pile positions to serve as pile position marks, and marking the steel bars, such as coating red paint or tying red adhesive tapes; in other embodiments, the reinforcing steel bar serving as the pile position mark is made into a tubular pile equal-diameter mold, and lime is scattered along the tubular pile equal-diameter mold so as to ensure the accuracy of the position during subsequent piling.

And (3) positioning a pile machine:

according to the marked pile position, the pile machine moves to be in position and rechecks the pile position;

other embodiments also include stake machine stake probes: according to the measurement locating points, the steel pipes with the same diameter are pressed through surface soil by a static pile pressing machine, the step is mainly aimed at a large-area backfill area, the backfill area is prevented from being provided with barriers such as old foundations, large concrete blocks and the like, if the soil layer condition of the field is good, pile pressing can be directly carried out without pile detection in order to improve work efficiency.

Pile hanging and pile inserting:

selecting and numbering each pile length and pile pressing sequence according to the set pile length of each pile position, wherein the pile length of the last pile is not smaller than the preset effective pile length, and the preset effective pile length is 5m in the embodiment;

the pile machine is hoisted in place according to the serial numbers in sequence, and the pile machine is aligned to the pile inserting holes of the measurement positioning points; specifically, the pile machine crane is utilized to hoist the pile to position according to the number sequence, and then the pile is held by the pile machine clamp to align with the measurement positioning point to be inserted into the pile hole, so that the angle of the pile is very difficult to correct in the pile pressing process, and the pile is correctly placed in position.

Pile driving is stopped when the pile is driven into soil by 50-80 cm, and then verticality adjustment is carried out; the perpendicularity of the pipe pile is monitored by adopting two theodolites, the theodolites are arranged at the position which is not affected by piling (about 20 meters away from the pile point), and are approximately in the directions of 90 degrees, the two theodolites are leveled, the monitoring guide frame is kept vertical, and the rotation, the sliding and the stay of the pile machine guide frame are used for adjusting.

Pile pressing:

the pile machine vertically presses the pipe pile into the soil, and two theodolites are adopted to bidirectionally control the verticality of the pipe pile in the pile pressing process, and the pressure and the depth of the pile pressing are monitored; the perpendicularity of the pipe pile is required to ensure that the compression bar and the pile body of the pipe pile are kept on the same axis as much as possible in the whole pile pressing process, the central line deviation of the upper pile section and the lower pile section is not more than 5mm, the bending sagittal height of the node is not more than 1/1000 pile length and not more than 20mm, the direction of the pile frame guide rod is regulated according to the direction of the pile body when necessary, and the pipe pile is prevented from being subjected to eccentric pressure as much as possible so as to prevent the pipe pile from being bent.

In the pile pressing process, the pile driver controls the pressure to gradually increase according to the sinking amount and the pile sinking speed of the pipe pile, and the pile sinking speed is generally controlled to be 1 m/min in the embodiment, so that the pile pressing quality is ensured, the rebound amount after pile pressing is reduced to be overlarge, and the bearing capacity is reduced too much; in actual engineering, controlling pile pressing resistance according to a pressure gauge, adjusting static synchronous balance of a pile driver, avoiding eccentricity, preventing pile foundation suspension, checking whether contact between a rear beam guide wheel and a guide pipe is normal, preventing a shell from being blocked, and recording;

if the pile is hard to sink in the pile pressing process, checking whether a pile frame guide rod is inclined and eccentric or not and whether a pile body is vertical or not; each pile is preferably finished continuously so as not to be difficult to continuously press down;

and in the pile pressing process, pile sinking record is carried out. In pile sinking record, the soil pressure and the final soil pressure are recorded in units of meters.

If the preset pile pressing stopping condition is met, pile pressing stopping is performed, and the pile pressing stopping condition is preset in the embodiment, including: the pile length reaches the shortest effective pile length and the pile final pressure reaches the preset setting requirement, wherein the shortest effective pile length and the preset setting requirement are set according to the requirement; if the shortest effective pile length is reached but the final pressure value is not reached (preset setting requirement), the engineering pile pressure value at the current stage can be controlled by temporarily pressing 2000kN, and the static load test report of the follow-up engineering pile to be tested is adjusted; if the minimum effective pile length is reached, and the pile end pressure reaches the preset setting requirement, pile pressing can be stopped.

The perpendicularity of the pipe pile in the pile inserting and pile pressing processes is less than or equal to 0.5%, and the pile can be continuously driven when the requirement is met. During pile sinking, constructors observe the footage change of the pile at any time, and if obstacles exist in geological layers and the pile body deviates, the footage change should be timely researched and processed by related personnel such as design, supervision and the like;

in addition, before the construction of the last pipe pile, white paint is used for marking the pile body at intervals of 1 meter so as to observe the pile penetration depth.

Pile extension and welding:

stopping pressing the pile when the pile head of the lower section pile is at a preset distance from the ground, and performing welding pile splicing, wherein the welding pile splicing process is controlled within a preset time; in the embodiment, the preset distance is 1-1.2 m, 1m is taken specifically, the preset time is 30 minutes, each procedure should be continuously carried out in the pile pressing process of the same pile, and the pile splicing time is controlled within half an hour, so that the pile pressing difficulty caused by overlong dead time is avoided; wherein the preset distance is 1-1.2 m, and the welding of the upper section pile is performed after the lower section pile is stably pressed into the soil, so that the lower section pile is prevented from shifting due to the welding;

specifically, the welding pile comprises:

before welding pile, cleaning the welding surfaces of two sections of pipe piles;

when pile extension is carried out, the axes of an upper pile section (a new pile extension section) and a lower pile section (an original pile section) are consistent, the dislocation deviation is smaller than a preset dislocation deviation value, and the preset dislocation deviation value is 2mm in the embodiment; when pile extension is carried out, a guide hoop can be arranged on the pile head of the lower pile section to guide the upper pile section to be in place, the welding surfaces of the upper pile section and the lower pile section are tightly attached, gaps cannot be formed at joints, and sundries such as iron sheets, iron wires and the like are tightly forbidden to be filled in the joint gaps;

checking the pile extension, and if the pile extension is qualified, performing positioning spot welding; wherein the positioning spot welding is fixed by symmetrically spot welding 4 to 6 points; and the welding material adopted in the spot welding is the same as that in the formal welding, and if the spot welding is defective, the spot welding is shoveled out in time;

dismantling the guide hoop and carrying out symmetrical layered welding; the positioning spot welding and the layered welding adopt low-current welding, so that the influence on the strength of the concrete joint part caused by the overhigh welding temperature is avoided to the greatest extent;

during welding, windproof treatment is carried out, so that welding deformation is reduced, welding seams are continuous and full, and the specified welding seam length is ensured; wherein the windproof treatment includes, but is not limited to: building a wind-proof baffle and using a wind cover;

after welding is finished, performing quality inspection on the welding, and performing beating after welding is cooled for a preset cooling time if the welding is qualified, wherein the preset cooling time is 8 minutes; the quality inspection is carried out, whether the inspection is qualified or not is judged according to whether the current welding condition meets the preset welding requirement or not, if yes, the inspection is qualified, and if not, the inspection is unqualified;

the preset welding requirements are as follows: each joint weld joint is not less than two layers, an outer layer can be welded after inner layer welding slag is cleaned, each layer of weld joint is staggered, the thickness of the weld joint is 8mm, the shortest distance from the root of a weld groove to the surface of the weld joint is not less than 12mm, and the thickness of an end plate is not less than 16mm; the welding seams are full and continuous, and construction defects such as undercut, weld flash and the like cannot be caused; the welding seam is required to be continuous and full, and the defects of slag inclusion or air holes and the like are avoided.

Pile feeding:

according to the design drawing and the actual situation on site, the pile feeding is performed to a preset depth, namely, pile feeding of the preset depth is performed, the range of the preset depth in the embodiment is 5-7m, 5m is taken, and the actual situation is the right.

Pile final pressure control:

according to the design drawing and the preset requirement, the pile final pressure value is greater than or equal to the preset pile final pressure value, the final pressure times are preset final pressure times, and the pressure stabilizing time of each time is not less than the preset pressure stabilizing time; wherein the preset pile final pressure value is 3000kN, the preset final pressure times are 3 times, and the preset pressure stabilizing time is 5s; in other embodiments, the voltage stabilizing time is within a preset voltage stabilizing time range of 5-8S; wherein the design drawing and the preset requirement are set according to specific engineering;

if the pile length reaches the shortest effective pile length and the pile final pressure reaches the preset setting requirement, namely the pile final pressure value is greater than or equal to the preset pile final pressure value, the final pressure times are preset final pressure times, and the pressure stabilizing time of each time is not less than the preset pressure stabilizing time, the pile final pressure control is completed; if the pile length does not meet the shortest effective pile length or the pile end pressure value is smaller than the preset pile end pressure value, generating prompt information to prompt related personnel to adjust if the pressure stabilizing time is smaller than the preset pressure stabilizing time, in the embodiment, notifying design, supervision and owners to the site through a terminal, and adjusting the static pressure load weight according to the test pile condition until the preset design requirement is met or the engineering pile control method and standard are agreed, so as to determine the construction parameters.

Pile cutting:

determining pile head height: according to the preset test requirement, reserving a preset length of the tubular pile, namely 50cm in the embodiment, wherein the preset length is a length higher than the ground, marking the height by using red paint, and then performing pile cutting treatment;

according to the height mark, a toothless saw is used for cutting one circle of the pile edge, so that the height of the pile head can be well controlled, and the corner of the pile can be prevented from being damaged in the pile drilling process;

checking the height mark, and if the height mark is checked to be qualified, cutting the tubular pile at one time; when the pile is cut, the quality of the pile after the pile is cut must be ensured, and the hard beating of a large hammer is strictly forbidden, so that the pipe wall of the pile is damaged, and even the bearing of a single pile of the pile is influenced;

cleaning pile heads, wherein the flatness height difference of the pile heads is smaller than or equal to the preset flatness height difference, namely + -1 cm in the embodiment, so as to avoid damaging the pile heads, and cleaning up sundries in a foundation pit by brushing out the cleaned pile with a steel wire brush after loose concrete on the pile heads is cleaned up;

in other embodiments, the method further comprises: after the pile head height is determined, tightly holding the end part of the pile body which does not need to be cut by using a hoop, and then chiseling a groove along the periphery of the upper edge of the hoop; wherein the hoop adopts a steel hoop;

in other embodiments, the method further comprises: after the pile head height is determined, judging whether the pile head height is larger than a preset pile head height, if so, carrying out sectional pile cutting treatment, fixing the pile head firmly by using a steel wire rope before pile cutting, and carrying out sectional pile cutting after a crane is hung firmly, thereby ensuring construction safety in the pile cutting process; the pile on the slope is anchored into the lowest point of the foundation pit according to the design requirement and begins to cut the pile upwards.

Pile head reinforcement:

the pile head after pile cutting is sleeved with end plates of the same specification, the exposed main ribs are welded firmly on screw holes of the end plates one by one, the bottom surface of the end plates is higher than the concrete surface of the pile head by 1-2cm and is horizontal, a matched special lower tray is arranged in an inner cavity of the pipe pile, hanging legs of the lower tray are welded firmly on the inner periphery of the end plates, the hanging height of the tray is determined according to the damage condition of the pile head, if the damage is serious, the hanging height is slightly deeper, generally 40-60cm, but a welding part is not required to exceed the upper end surface, if the upper part is required to be connected, and a ventilation pipe in the center of the tray can be higher.

The leakage stopping treatment is carried out on the lower opening of the pile cap hoop and the pile body contact ring, the leakage stopping treatment is carried out by using a mud ball to plug, a layer of broken stone is firstly paved on a tray in an inner cavity of the pipe pile, a layer of fine sand is paved on the broken stone, the thickness of the two layers is 10cm, the leakage stopping treatment is good, epoxy resin concrete is poured into the inner cavity, whether leakage occurs or not is observed, the secondary leakage stopping treatment is carried out if local leakage exists, the epoxy resin concrete is close to the end face, the uppermost part is filled with epoxy resin mortar, the lower bottom surface of the end plate is in close contact with the pile head concrete, the outer hoop and the pile body contact joint are fully filled, the upper part is convenient to fill compactly, and the pile can be normally delivered after the epoxy resin is completely hardened (generally every other day).

Recording and detecting:

recording pile length, operation time and process of each step in pile sinking process, and generating pile sinking record;

judging whether construction abnormality exists according to pile sinking records, and reporting if so; and judging whether construction abnormality exists, wherein if the final pressure value is less than 2600kN, the pile top elevation is not sent to the designed elevation and the effective pile length is less than 20 meters, the abnormality exists.

Example two

This embodiment is substantially the same as the above embodiment except that:

before pile inserting and pile pressing, a vertical monitoring system is arranged at a preset distance from the pipe pile 1 and used for monitoring the vertical condition of the pipe pile 1 in the pile inserting and pile pressing process; the preset distance is set according to the requirements, so that the vertical monitoring system can monitor the complete tubular pile 1;

wherein the vertical monitoring system comprises: the device comprises a mounting frame, a cradle head and a controller;

the mounting frame can be any mounting frame, such as a tripod and a monopod; the bottom of the soil can be inserted into a soil layer, so that the fixing effect is enhanced;

the cradle head is arranged on the mounting frame, and an image acquisition device and a horizontal calibration device are vertically arranged on the plane of the cradle head;

the horizontal calibration device is used for monitoring the inclination of the plane of the cradle head relative to the horizontal plane and sending the inclination to the controller; in the embodiment, the level calibration device adopts an electronic level meter; the electronic level is electrically connected with the controller, the electronic level is flexible to calibrate, and the effect of vertical monitoring is guaranteed;

the controller is electrically connected with the cradle head and is used for driving the image acquisition device and the horizontal calibration device to rotate in the same way by controlling the cradle head to rotate, and adjusting the rotation of the cradle head according to the inclination, so that the cradle head is parallel to the horizontal plane, and the image acquisition device is vertical to the horizontal plane when acquiring the video image of the tubular pile 1;

the image acquisition device is used for acquiring video images of the tubular pile 1 and sending the video images to the controller;

the controller is also used for analyzing the vertical condition of the tubular pile 1 and the horizontal plane according to the video image;

specifically, the method comprises the following steps: extracting images in the video images;

identifying the tubular pile 1 in the image by adopting an image identification technology;

extracting the side lines and the center line of the identified tubular pile 1;

calculating included angles between the side line and the central line of the image respectively;

according to the included angle, the vertical condition of the tubular pile 1 and the horizontal plane is identified; after the cradle head rotates, the image acquisition device is vertical to the horizontal plane when acquiring the video image of the tubular pile 1, so that the vertical condition of the tubular pile 1 and the horizontal plane can be indicated directly through the included angles between the side lines and the central line of the image respectively,

specifically, the angle between the side line of the pipe pile 1 and the center line of the image represents the degree of inclination of the pipe pile 1 in the forward-backward direction; the included angle between the central line of the pipe pile 1 and the central line of the image represents the inclination degree of the pipe pile 1 leftwards and rightwards;

in this embodiment, the side line is a left side line, and in other embodiments, a right side line may be used, or both side lines may be used;

as shown in fig. 2, when the left side line and the central line of the tubular pile 1 in the image are parallel to (coincide with) the central line of the image, the tubular pile 1 is vertically pressed into the soil layer, and the vertical condition of the tubular pile 1 and the horizontal plane is vertical, wherein the judgment of the included angle and the relation between the lines can be performed by establishing a coordinate system in the image, as shown in fig. 3;

as shown in fig. 4, in the image, an included angle a exists between the center line of the tubular pile 1 and the center line of the image, an included angle B exists between the left side edge line of the tubular pile 1 and the center line of the image, a=b, and according to the included angle B being on or under the x axis, the offset direction of the tubular pile 1 is determined, in fig. 4, the included angle B is below the x axis, the tubular pile 1 is offset to the left, so that the vertical condition of the tubular pile 1 and the horizontal plane is the left offset included angle a of the tubular pile 1;

as shown in fig. 5, the center line of the tubular pile 1 in the image is parallel to the center line of the image (coincides with the center line in the image), an included angle C exists between the left side edge line of the tubular pile 1 and the center line of the image, and according to the included angle C being on or off the x axis, the offset direction of the tubular pile 1 is judged, as shown in fig. 5, the included angle C is below the x axis, the tubular pile 1 is offset forward, so that the vertical condition of the tubular pile 1 and the horizontal plane is the forward offset included angle C of the tubular pile 1;

as shown in fig. 6, the center line of the tubular pile 1 in the image is parallel to the center line of the image (the center line coincides with the center line of the image in the image), an included angle D exists between the left side edge line of the tubular pile 1 and the center line of the image, the included angle D is above the x-axis, and the tubular pile 1 is offset backwards, so that the vertical condition of the tubular pile 1 and the horizontal plane is that the tubular pile 1 is offset backwards by the included angle D;

as shown in fig. 7, in the image, an included angle E exists between the center line of the tubular pile 1 and the center line of the image, an included angle Z exists between the left side edge line of the tubular pile 1 and the center line of the image, and E is not equal to Z, and the tubular pile 1 is offset leftwards and forwards according to the included angle Z below the x axis, so that the vertical condition of the tubular pile 1 and the horizontal plane is that the tubular pile 1 is offset leftwards by the included angle E and forwards by the included angle Z;

in the pile-inserting and pile-pressing process, judging whether the vertical condition meets the preset vertical requirement, if so, continuing pile-inserting and pile-pressing; if not, generating vertical correction data according to the vertical condition and a preset vertical requirement;

specifically, the controller judges whether an included angle exists, the included angle is the largest angle or not, and the preset vertical requirement is set according to actual requirements; in this embodiment, the preset vertical requirement is that no included angle exists; generating vertical correction data according to the vertical condition and a preset vertical requirement, for example: the vertical condition of the pipe pile 1 and the horizontal plane is that the pipe pile 1 is deviated left by an included angle A, and the vertical correction data is that the pipe pile 1 is corrected right by the included angle A;

correcting the tubular pile 1 in the pile inserting and pressing process according to the vertical correction data; specifically, the controller sends the vertical correction data to the pile machine, and the pile machine corrects the tubular pile 1 in the pile inserting and pressing process.

Furthermore, the vertical monitoring system further includes: a display device and an early warning device;

the display device is respectively connected with the controller and the image acquisition device and is used for displaying video images, vertical conditions and vertical correction data; and the display device is used for visually displaying the data, so that the data can be conveniently checked.

The early warning device is electrically connected with the controller;

in the pile inserting and pressing process, the controller is also used for judging whether the vertical condition meets the preset vertical requirement, and if not, the pre-warning device is triggered to perform the inclination pre-warning of the pipe pile 1; the early warning device can prompt the current vertical condition and needs to be adjusted.

Wherein generating vertical correction data according to the vertical condition and the preset vertical requirement, further comprises:

judging whether the vertical condition meets the preset safe inclination range, if not, triggering an early warning device, and prompting the toppling danger of the tubular pile 1. When the vertical condition does not meet the preset safe inclination range, the tubular pile 1 is in danger of inclination, so that the early warning device is triggered in time to prompt the tubular pile 1 to topple over danger, people are evacuated, and the safety of workers is ensured; wherein trigger early warning device, carry out tubular pile 1 and empty dangerous suggestion, include:

the controller analyzes the dumping direction of the tubular pile 1 according to the vertical condition, generates prompt information containing the dumping direction and sends the prompt information to the early warning device;

the early warning device is used for carrying out the dumping danger prompt of the tubular pile 1 containing the dumping direction according to the prompt information, so as to prompt the evacuation direction of workers.

Example III

This embodiment is substantially the same as the above embodiment except that: the controller is also used for identifying workers in the construction area and whether the workers wear safety helmets or not by adopting an image identification technology according to the video image, and triggering the early warning device to carry out the prompt of wearing the safety helmets if the workers in the construction area wear the safety helmets; the early warning device in this embodiment includes: a speaker for broadcasting prompt voice for wearing the safety helmet;

and the controller is also used for identifying the position of the worker in the construction area by adopting an image identification technology according to the video image, judging whether the position of the worker is in a safety area, and triggering the early warning device to carry out position safety prompt if the position of the worker is not in the safety area.

Because the vertical monitoring system can monitor the vertical condition of the pipe pile 1 in the pile-inserting and pile-pressing process, video images can be acquired in the whole process, further identification and analysis are carried out through the acquired video images, and prompt is carried out, so that the safety construction of a building construction site is maintained in an auxiliary manner, potential safety hazards are eliminated, and the safety of workers is guaranteed.

Example IV

The present embodiment differs from the first embodiment substantially in that: pile splicing is carried out in the pile inserting process by a static pressure method, namely a plurality of pipe piles are inserted into the same position, after pile inserting and pile pressing of the previous pipe pile is completed, a part of pipe piles are arranged on a soil layer, pile splicing is carried out on the next pipe pile and the previous pipe pile, welding is carried out, and pile pressing is carried out; when pile extension is carried out, the axes of the upper section pile (the next section of pipe pile) and the lower section of pile (the upper section of pipe pile) are consistent, the dislocation deviation is smaller than a preset dislocation deviation value, and the preset dislocation deviation value is 2mm generally; the inconsistent axial lines of the upper section pile and the lower section pile are prevented during welding; the axis is the central line, the traditional mode of detecting the axis is consistent, the perpendicularity of the upper section pile and the lower section pile is determined by means of a theodolite, and the upper section pile is guided to be in place by means of the guide hoop arranged on the pile head of the lower section pile when the pile is spliced, and further checking and detecting whether the dislocation deviation is smaller than the preset dislocation deviation value are not carried out, so that a certain risk of reducing the engineering quality exists, and the scheme also provides

When the vertical monitoring system is arranged, the directions of the tubular pile and the shadow thereof during pile extension welding are obtained;

setting the position of a vertical monitoring system according to the direction of the pipe pile and the shadow thereof when pile splicing welding is carried out, so that an image acquisition device acquires the video image of the pipe pile, wherein the video image of the pipe pile comprises the shadow of the pipe pile; the position of the vertical monitoring system is specifically set so that the shadow of the pipe pile in the collected video image is shielded to the minimum, and the shadow of the pile splicing position of the upper pile section and the lower pile section can be collected; in this embodiment, the shadow is formed by irradiation of sunlight, and in other embodiments, an illumination light source may be provided to irradiate the tubular pile, so that the image acquisition device acquires the image of the tubular pile and the shadow thereof;

the controller is used for analyzing whether the axes of the upper section pile and the lower section pile are consistent according to the video image;

specifically, an image in a video image is extracted;

adopting an image recognition technology to recognize the tubular pile 1 and the shadow thereof in the image, as shown in fig. 8;

extracting two side edges of the identified shadow;

judging whether the side line is a straight line, if so, judging that the axes of the upper section pile and the lower section pile are consistent, and if not, judging that the axes of the upper section pile and the lower section pile are inconsistent, generating an adjustment prompt, and prompting, wherein the side line is not a straight line as shown in fig. 9; the lateral line is parallel to the axis, if the axes of the upper section pile and the lower section pile are consistent, the two section pipe piles form a section of pipe pile, the shadows of the upper section pipe pile and the lower section pipe pile are the same as the shadows of the section of pipe pile, and the lateral line is a straight line, so that whether the axes of the upper section pile and the lower section pile are consistent can be identified through the method, and because the axes of the upper section pile (the lower section pipe pile) and the lower section pile (the upper section pipe pile) are consistent when the piles are spliced, the dislocation deviation is smaller than the preset dislocation deviation value, the preset dislocation deviation value is 2mm, wherein the preset dislocation deviation value of 2mm is not easy to identify and see relative to the volume of the pipe pile, and the dislocation occurs in the shadows, so that the lateral line of the formed shadows is not a straight line, thereby being easier to identify. The vertical monitoring system can perform multiple monitoring and detection in the whole engineering, and has low cost and wide application.

In other embodiments, extracting both side edges of the identified shadow is extracting both side edges of the identified shadow in the preset area; the preset area is an area taking the contact surfaces of the upper section piles and the lower section piles as central lines, the preset distance is taken upwards and the preset distance is taken downwards, the shadow of the preset area comprises the shadow of the contact surfaces of the upper section piles and the lower section piles, and the position of the contact surfaces in the shadow is identified by identifying the contact surfaces (or contact lines) of the upper section piles and the lower section piles in the image and the proportion of the upper section piles and the lower section piles and the shadow thereof in the image;

because the bending of the side line in the shadow is easily influenced by the outside, such as uneven ground, the side line is not a straight line, the identification range is reduced through the arrangement of the preset area, and the outside interference is reduced, because the tubular pile can control the bending of the tubular pile during production, other side lines except the shadow of the contact surface part are bent and are only influenced by the outside, thereby improving the accuracy of scheme identification;

in other embodiments, the method further comprises: judging whether the side line is a straight line or not, if not, acquiring a history image when pile inserting and pile pressing are carried out; the vertical monitoring system is fixed in position after being set, the acquisition time points of the acquired historical images are historical images with preset time differences before and after the acquisition time points of the identified tubular pile 1 and the shadow thereof in the images, and therefore the same sun irradiation direction and high shadow similarity are guaranteed;

in the historical images, obtaining historical images similar to the images; specifically, according to the coincidence ratio of shadows in the image and the historical image, taking the historical image with the highest coincidence ratio as a historical image similar to the image;

adopting an image recognition technology to recognize the tubular pile 1 and the shadow thereof in the historical image;

extracting and identifying two side edges of the shadow in the preset area from the historical image;

judging whether the side lines at two sides in a preset area of the historical image are straight lines, if so, judging that the axes of the upper section pile and the lower section pile are inconsistent, if not, judging whether the similarity between the side lines at two sides in the preset area of the historical image and the side lines at two sides in the preset area of the image accords with the preset similarity, and if so, judging that the axes of the upper section pile and the lower section pile are consistent; if not, judging that the axes of the upper section pile and the lower section pile are inconsistent;

because only one pile is present when pile inserting and pile pressing, if no external interference exists, the lateral lines of the shadows of the piles are straight lines, if no external interference exists in the historical image, the existence of the external interference is indicated, and therefore similar bending is caused if the same interference exists currently, whether the similarity between the lateral lines in the preset area of the historical image and the lateral lines in the preset area of the image accords with the preset similarity is judged, if so, the coincidence of the axes of the upper pile and the lower pile can be judged, and therefore the external interference is eliminated through the historical data, and the recognition accuracy is improved.

The foregoing is merely an embodiment of the present application, and a specific structure and characteristics of common knowledge in the art, which are well known in the scheme, are not described herein, so that a person of ordinary skill in the art knows all the prior art in the application date or before the priority date, can know all the prior art in the field, and has the capability of applying the conventional experimental means before the date, and a person of ordinary skill in the art can complete and implement the present embodiment in combination with his own capability in the light of the present application, and some typical known structures or known methods should not be an obstacle for a person of ordinary skill in the art to implement the present application. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present application, and these should also be considered as the scope of the present application, which does not affect the effect of the implementation of the present application and the utility of the patent. The protection scope of the present application is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims (10)

1. The pile splicing method of the static pressure pile is characterized by comprising the following steps:

pile extension and welding: stopping pressing the pile when the pile head of the lower section pile is at a preset distance from the ground, and performing welding pile splicing, wherein the welding pile splicing process is controlled within a preset time;

wherein weld pile splicing comprises:

before welding pile, cleaning the welding surfaces of two sections of pipe piles;

when pile extension is carried out, the axes of the upper section pile and the lower section pile are consistent, and the dislocation deviation is smaller than a preset dislocation deviation value;

installing a guide hoop on the pile head of the lower section pile during pile extension to guide the upper section pile to be in place, and tightly attaching the welding surfaces of the upper section pile and the lower section pile;

checking the pile extension, and if the pile extension is qualified, performing positioning spot welding;

dismantling the guide hoop and carrying out symmetrical layered welding;

carrying out windproof treatment during welding;

after welding is finished, performing quality inspection on the welding, and performing beating after welding is cooled for a preset cooling time if the quality inspection is qualified; the quality inspection is carried out, whether the inspection is qualified or not is judged according to whether the current welding condition meets the preset welding requirement or not, if yes, the inspection is qualified, and if not, the inspection is unqualified; the preset welding requirements are as follows: each joint weld joint is not less than two layers, each layer of weld joint is staggered, the thickness of the weld joint is 8mm, the shortest distance from the root of a weld groove to the surface of the weld joint is not less than 12mm, and the thickness of an end plate is not less than 16mm.

2. A method of pile extension according to claim 1, characterised in that the wind-resistant treatment comprises: one or more of building a windbreak and using a hood.

3. The method for pile extension by static pressure according to claim 1, further comprising, before the pile extension and welding:

pile position measurement and placement: discharging the pile position according to a preset measurement control point and the pile position coordinate by adopting a total station, and marking the pile position;

and (3) positioning a pile machine: according to the marked pile position, the pile machine moves to be in position and rechecks the pile position;

hanging piles and inserting piles: selecting each pile length and pile pressing sequence according to the set pile length of each pile position, numbering, and setting the pile length of the last pile not smaller than the preset effective pile length; the pile machine is hoisted in place according to the serial numbers in sequence, the pile inserting holes of the positioning points are aligned and measured, the pile inserting is stopped to press the pile after the pile inserting is carried out in soil for presetting the pile inserting depth, and verticality adjustment is carried out;

pile pressing: the pile machine vertically presses the pipe pile into the soil, two theodolites are adopted to bidirectionally control the verticality of the pipe pile in the pile pressing process, the pressure and the depth of the pile pressing are monitored, and the pile machine gradually increases the control pressure according to the sinking amount and the pile sinking speed of the pipe pile; if the preset pile pressing stopping condition is met, pile pressing stopping is carried out, wherein the preset pile pressing stopping condition comprises the following steps: the pile length reaches the shortest effective pile length and the pile final pressure reaches the preset setting requirement.

4. The method of staking as set forth in claim 1, further comprising: pile feeding: pile feeding is performed to a preset depth according to a design drawing and the actual situation of the site;

pile final pressure control: according to the design drawing and the preset requirement, the pile final pressure value is greater than or equal to the preset pile final pressure value, the final pressure times are preset final pressure times, and the pressure stabilizing time of each time is not less than the preset pressure stabilizing time; if the pile length reaches the shortest effective pile length and the pile end pressure reaches the preset setting requirement, the pile end pressure reaches the preset setting requirement as follows: the pile final pressure value is larger than or equal to the preset pile final pressure value, the final pressure times are preset final pressure times, and the pressure stabilizing time of each time is not smaller than the preset pressure stabilizing time, so that pile final pressure control is completed;

recording and detecting: recording pile length, operation time and process of each step in pile sinking process, and generating pile sinking record; and judging whether construction abnormality exists according to the pile sinking record, and reporting if the construction abnormality exists.

5. A method of staking as claimed in claim 3, further comprising: pile machine pile detection: and according to the measurement positioning points, the steel pipes with the same diameter are pressed through surface soil by a static pile pressing machine.

6. A method of pile driving according to claim 3, wherein the perpendicularity requirement of the pile driving pipe pile in the pile driving and pile driving is 0.5% or less.

7. The method of staking as set forth in claim 1, further comprising: pile cutting;

pile cutting: determining pile head height: according to the preset test requirement, reserving a preset length for the tubular pile, marking the tubular pile by using a height mark, and then performing pile cutting treatment;

cutting the periphery of the pile by a toothless saw according to the height mark;

checking the height mark, and if the height mark is checked to be qualified, cutting the tubular pile at one time;

cleaning the pile head, wherein the flatness height difference of the pile head is smaller than or equal to the preset flatness height difference.

8. The method of staking of claim 7, wherein said staking further comprises: after the pile head height is determined, the pile body end part which does not need to be cut off is held tightly by a hoop, and a groove is chiseled along the periphery of the upper edge of the hoop.

9. The method of staking of claim 7, wherein said staking further comprises: after the pile head height is determined, judging whether the pile head height is larger than the preset pile head height, if so, carrying out sectional pile cutting treatment, fixing the pile head firmly by using a steel wire rope before sectional pile cutting, and carrying out sectional pile cutting after the crane is hung firmly.

10. The method of staking of claim 7, further comprising: reinforcing pile heads;

pile head reinforcement: the pile head after pile cutting is sleeved with end plates of the same specification, the exposed main ribs are welded firmly on screw holes of the end plates one by one, the bottom surface of the end plates is higher than the concrete surface of the pile head by 1-2cm and is horizontal, a matched special lower tray is arranged in an inner cavity of the pipe pile, hanging legs of the tray are welded firmly on the inner periphery of the end plates, and the hanging height of the tray is determined according to the damage condition of the pile head;

the lower opening of the pile cap hoop and the pile body contact ring are subjected to leakage-stopping treatment.