CN113605390A - Accurate positioning structure for pile connection and construction method - Google Patents
Accurate positioning structure for pile connection and construction method Download PDFInfo
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- CN113605390A CN113605390A CN202111031468.3A CN202111031468A CN113605390A CN 113605390 A CN113605390 A CN 113605390A CN 202111031468 A CN202111031468 A CN 202111031468A CN 113605390 A CN113605390 A CN 113605390A
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- 238000010276 construction Methods 0.000 title claims abstract description 54
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 417
- 239000010959 steel Substances 0.000 claims abstract description 417
- 238000009434 installation Methods 0.000 claims abstract description 15
- 230000002787 reinforcement Effects 0.000 claims description 115
- 238000013461 design Methods 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 26
- 239000004567 concrete Substances 0.000 claims description 23
- 238000005553 drilling Methods 0.000 claims description 18
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- 239000011241 protective layer Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
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- 229910052742 iron Inorganic materials 0.000 description 1
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- E—FIXED CONSTRUCTIONS
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- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/04—Guide devices; Guide frames
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
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Abstract
The invention discloses a pile connection accurate positioning structure and a construction method. During construction, the steel upright post can be effectively supported through the arrangement of the control frame; the supporting platform is arranged and can be fixedly connected through a bearing arm which is connected with the steel upright column in advance; the arrangement of the first jack and the second jack is beneficial to installation and convenient to adjust, clamp and fix; the first jack and the second jack are jointly controlled through the verticality adjusting control instrument, and cooperation and synchronous control are facilitated.
Description
Technical Field
The invention belongs to the technical field of pile foundation construction, and particularly relates to a pile connection accurate positioning structure and a construction method.
Background
With the development and improvement of the styles of construction engineering, the bearing requirements of buildings or structures on lower foundations are higher and higher, and pile foundations, which are widely used as foundation forms, can bear most of the load of upper buildings and structures. In the existing construction, in the pile foundation, each frame column is supported by a large-diameter cast-in-place pile, which is called a construction form of one column and one pile. The verticality control of the vertical column pile in one column and one pile is always a difficult point and a key point of technical attack. Particularly, when the verticality requirement is high, the existing adjusting equipment is difficult to meet the precision requirement; and at present, the upright post is installed after the pile is formed, the upright post is adjusted to be vertical and fixed, the waiting time for the pile hole after the hole is formed is too long, and the thickness of the pile low sediment is difficult to ensure by secondary hole cleaning of the pile hole.
Disclosure of Invention
The invention provides a pile connection accurate positioning structure and a construction method, which are used for solving the technical problems of installation and fixation of a column body on a drilled pile, downward placement of a reinforcement cage, accurate adjustment of the column body and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
a pile connection accurate positioning structure comprises a steel upright, a bored pile connected below the steel upright, a supporting platform connected on the ground, a bearing arm connected on the supporting platform and detachably connected with the steel upright, a control frame connected on the supporting platform, a first jack connected between the control frame and the steel upright in the horizontal direction, a bracket connected on the steel upright, a protective cylinder connected below the ground of the steel upright and positioned at the periphery of the steel upright, a second jack connected between the protective cylinder and the level of the steel upright, a verticality adjusting controller connected with the first jack and the second jack and positioned on the ground, an inclinometer connected outside the steel upright and an inclinometer connected with the inclinometer and positioned on the ground;
the control frame contains the accuse frame pole setting that is square arranging and connects in the accuse frame horizontal pole at accuse frame pole setting top, accuse frame pole height adaptation steel column erection elevation.
Furthermore, the cross rod of the control frame is horizontally shaped like a Chinese character 'hui' and a reinforcing rod is connected between the two square shapes; the size of the internal square in the cross rod of the control frame corresponds to that of the steel stand column, connecting holes are formed in the reinforcing rod between the two square in the cross rod of the control frame at intervals, and the connecting holes are detachably connected with the steel stand column through adjusting pull rods.
Furthermore, the first jacks are detachably connected to the control frame upright rods and are symmetrically arranged on the steel upright ring at intervals, the first jacks are horizontally arranged, and the extending parts of the first jacks are connected with the outer wall of the steel upright; the first jack overhanging part is connected with an arc cushion pad which is connected with the outer wall of the corresponding steel upright post.
Furthermore, the fixed end of the second jack is connected with the protective cylinder and symmetrically arranged on the ring shape of the steel upright at intervals, the overhanging end is abutted with the outer wall of the steel upright, and the overhanging part of the second jack is connected with an arc cushion pad which is connected with the outer wall of the steel upright correspondingly; and the first jack and the second jack are connected with the verticality adjusting controller in parallel.
Furthermore, the top end of the steel upright post is provided with an ear plate, the middle upper part of the steel upright post is provided with a bracket, and the middle lower part of the steel upright post is also provided with a lifting lug of a steel reinforcement cage; lifting lugs on the steel stand columns are connected with a crane through lifting ropes or detachably connected with a control frame through adjusting pull rods, a bracket is lapped at the top of the control frame, and lifting lugs of the steel reinforcement cage are detachably connected with the prefabricated steel reinforcement cage to be poured through lifting ribs.
Further, the construction method of the pile connection accurate positioning structure comprises the following specific steps:
the method comprises the following steps that firstly, before construction, a construction site is cleaned and leveled, a supporting platform is designed, the gradient is not more than 1%, after the site is hardened, a steel stand column is measured and positioned before being installed, the plane position of the steel stand column is determined, then a cross line is popped out on the site, after a hole is formed, slurry is cleaned, the cross line is rechecked, and the steel stand column is ensured to be positioned accurately;
step two, customizing a pile casing according to hole forming precision requirements and verticality adjusting requirements, wherein the diameter of the pile casing is not less than 20cm larger than that of the drilled pile; processing and manufacturing a control frame, measuring the position of the control frame again after a steel reinforcement cage is placed after the drilled pile is drilled, and controlling the central error within 5 mm; installing a control frame according to positioning, measuring and placing a steel upright post locating center line on a supporting platform at the lower part of the control frame, and marking at a corresponding position to ensure that the positioning must be correct;
the upper part of the control frame is in supporting connection with the steel upright bracket, and the lower part of the control frame is detachably connected with at least 4 first jacks which are used for centering and adjusting the axis of the steel upright and fixing the steel upright and are used as fulcrums in the verticality adjusting process; in addition, at least 4 second jacks are arranged in the protective cylinder and used for adjusting the verticality of the steel upright column and serving as force action points in the verticality adjusting process; after the control frame is in place, determining the elevation of the steel upright post according to the measured data, welding a bracket at the position of the steel upright post corresponding to the elevation, erecting the steel upright post on the upper part of the control frame through the bracket for adjusting the elevation, and arranging a short steel bar at the lower part of the platform so as to adjust the inclination angle of the steel upright post;
thirdly, arranging an inclinometer pipe on the side surface of the steel upright, and fixing a central marking line of the steel upright of the inclinometer pipe outside the steel upright during arrangement; the inclination measuring pipe is arranged on the outer wall of the steel upright post, the upper circle center, the lower circle center and the center of the steel upright post are kept on the same plane during installation, the distance between the two circle centers at the upper part is kept equal to the distance between the two circle centers at the lower part, and the middle of the inclination measuring pipe is slightly bent to have no influence on a measuring result; after the installation is finished, checking and measuring the circle center deviation (Xs3, Ys3) between the straight pipe and the steel upright column, wherein X s3 and Ys3 are both less than or equal to 3mm and are qualified;
fourthly, during on-site construction, mechanically positioning and excavating to form a hole, pulling a cross line on the protective cylinder before opening the hole, ensuring that the central position of the drill bit is consistent with the central position of the cross line, and drilling at a low gear and constant speed in the hole forming process; removing the hole forming machine, and finishing the orifice site again to ensure that the orifice facility and the steel pipe upright post do not sink after being installed; placing or pouring a supporting platform, wherein a circular hole is formed in the supporting platform and corresponds to the installation steel upright post, and a control frame is installed on the supporting platform;
the height of a vertical rod of a control frame in the control frame is adjusted to be leveled to the horizontal and is fixedly connected with the supporting platform; the supporting platform and the straightening frame are centered and guaranteed to be 'four-center one in one' (the center line of the pile casing, the center of the supporting platform, the center of the control frame and the center of the pile position);
fifthly, checking the axis and the verticality of the steel upright after the steel upright is hoisted in place; before the operation step, a steel upright center cross line is popped above a supporting platform orifice; ensuring that the cross center line of the supporting platform coincides with the design center for positioning the pile hole and the center point of the bottom guider, and the error does not exceed 1mm, adopting a laser plummet to enable the center point of the lower guider to coincide with the cross key two points at the top of the hole opening, and then marking a positioning center line and a control frame mounting positioning line on the supporting platform; after the steel upright column is hoisted to the position above the pile hole by adopting a crane, a lifting rope at the top of the steel upright column is not detached firstly, so that the steel upright column is prevented from sliding downwards;
step six, during vertical control adjustment, the vertical control system measures the perpendicularity of the steel upright by adopting an inclinometer, and applies lateral thrust to the steel upright through a first jack on the control frame, so that the inclination angle of the steel upright is changed, and the perpendicularity of the steel upright meets the requirement;
after the steel upright post is centered, a verticality monitoring probe is placed into an inclinometer, the probe slides into the PVC pipe along a cross groove through a cable, at least one datum is collected every 0.5 meter in two axial directions, and a verticality initial curve is drawn; then, putting the verticality monitoring probe into the inclination measuring pipe again, monitoring in real time, judging the offset of the steel upright according to the initial curve, adjusting the first jack and/or the second jack for adjustment until the verticality meets the design requirement, and fixing the steel upright by using the first jack and the second jack;
the upper part of the steel upright post is also provided with a guide post, the control frame is connected with the guide post through an adjusting pull rod, and when the first jack and the second jack cannot be adjusted or the adjusting effect is not large, the adjusting pull rod is adopted to adjust the verticality together with the jacks until the requirements are met.
Further, for the reinforcement cage in the second step, the reinforcement cage includes three parts: the steel reinforcement cage of the lower drilling pile, the steel reinforcement cage in the steel upright tube and the steel reinforcement cage of which the outer side of the steel upright tube has the same diameter as the steel reinforcement cage of the lower drilling pile; the protective layer outside the steel reinforcement cage is connected with a circular roller type concrete cushion block;
the pile reinforcement cage with the drilled lower part is processed according to different design requirements and pile diameters in a reinforcement processing field in a classified mode, the whole cage can be manufactured near a pile hole and is hoisted to a wellhead at one time according to hole forming depth allocation and combined with site conditions, and n-shaped rings are welded at symmetrical positions of the top of the cage to be connected with the steel upright columns;
the steel reinforcement cage in the steel upright tube is blanked according to the design, the steel reinforcement cage in the tube can be welded with the steel tube, the double-sided welding is adopted for 5D, the single-sided welding is adopted for 10D, the double-sided welding is preferably adopted for uniform stress, the anchor bars outside the tube are made into a cage shape according to the design and extend into the tool post, and the most top stiffening ribs can be properly amplified and attached to the inner diameter of the tool post for not influencing the up-and-down movement of the feeding tube;
the steel reinforcement cage outside the steel column pipe is manufactured independently according to design requirements, and the stiffening hoops are arranged outside the main ribs and connected with the steel reinforcement cage at the hole openings.
Further, according to the characteristics of long steel upright posts and long length of the steel upright posts anchored in the steel reinforcement cage, the construction method that the steel upright posts are placed into the steel reinforcement cage firstly, after the top of the steel reinforcement cage is basically flush with the top of a pile hole, the steel upright posts are hoisted in place, a section of steel upright posts are inserted into the center of the pile hole according to the design requirement, the steel upright posts are inserted into the steel reinforcement cage for 2000mm, and then the steel reinforcement cage in the hole is lifted and sleeved on the outer sides of the steel upright posts vertical to the hole for the second time by utilizing the auxiliary hooks on the crane arms;
during construction, firstly, hoisting and transporting the processed reinforcement cage in place by using a crane, aligning the central point of the pile hole, vertically and slowly placing the reinforcement cage into the pile hole, placing the top of the reinforcement cage 500-1000mm higher than the natural ground, temporarily fixing the reinforcement cage, and adjusting the reinforcement cage at the same time to ensure that the center of the reinforcement cage is superposed with the central line of the pile hole; after the steel reinforcement cage is in place and adjusted to be qualified, a crane is used for transporting and hoisting the steel upright column at the corresponding position, when the steel upright column is transported to the upper space of the corresponding pile hole, the crane is stabilized, then the relative distance between the steel upright column and the pile hole is observed, then the steel upright column is slowly moved and in place according to the command, when the central vertical line of the steel upright column and the pile hole are focused on a vertical line, the bottom of the steel upright column is slowly hooked, the steel upright column is temporarily inserted into the steel reinforcement cage in the hole, at the moment, the steel upright column is slowly inserted, the insertion depth is not more than 2000mm, and then the steel upright column is stopped from being inserted.
Further, when the length of the steel reinforcement cage sleeved into the steel upright column meets the length and elevation of the design requirement, then hanging the steel reinforcement cage hanging bars on steel reinforcement cage lifting lugs which are arranged in advance on the steel upright column; after the steel bar is hung on a lifting lug of a steel reinforcement cage through a lifting rib, a crane is started to lower the whole steel upright column according to a designed elevation; when the steel upright post is placed downwards, the steel upright post cannot be completely and accurately placed to a control elevation of a design requirement at one time, and the distance from a control elevation line on the steel upright post and a control sideline at the left position and the right position on the supporting platform to any side of the outer surface of the steel upright post is inspected by observing the distance when the steel upright post descends; at the moment, the first jack at the top and the crane are utilized to slowly lift the steel stand column, the verticality condition of the steel stand column is carried out according to the verticality detector arranged on the steel stand column body, and the verticality adjusting control instrument is started simultaneously to adjust the directions of the top and the bottom of the steel stand column.
Further, when the elevation and the verticality of the steel upright post meet the requirements, the top of the steel upright post is fixed, the steel upright post is fixedly connected with a bearing arm which is connected with the steel upright post in advance by utilizing a steel plate which is embedded in a supporting platform, and the steel upright post is controlled to float upwards and move leftwards and rightwards in the concrete pouring process; after concrete is poured, the control frame and the corresponding positioning structure are detached, the bearing arm is reserved, and meanwhile, the top control frame tightly fixes the top end of the steel stand column in the pouring construction process, so that the steel stand column is guaranteed not to deform in the concrete pouring construction process.
The invention has the beneficial effects that:
1) according to the invention, through the arrangement of the control frame, on one hand, the steel upright column can be effectively borne, and on the other hand, an installation space is provided for the first jack, so that the adjustment of the steel upright column is facilitated; and the bearing arms which are connected in advance on the steel upright posts can be fixedly connected by combining the arrangement of the bearing platform;
2) according to the invention, through the arrangement of the first jack and the second jack, the first jack is connected to the control frame to be beneficial to stress, and the other end of the first jack is directly laterally adjusted to the steel upright column, so that accurate adjustment and clamping fixation can be carried out; the second jack is connected to the protective cylinder, so that the installation is facilitated, and the adjustment, clamping and fixing are facilitated; the first jack and the second jack are jointly controlled by the verticality adjusting controller, so that cooperation and synchronous control are facilitated; the steel upright post can be further adjusted by adjusting the pull rod and the crane;
3) the invention is beneficial to the adjustment and control of the steel upright column and the reinforcing mesh during hoisting by the connection of the tool column and the steel upright column and the process control during hoisting;
according to the invention, through the process control and adjustment of the positioning structure, the positioning, fixing and hoisting of the steel upright column at the upper part of the bored pile and the subsequent concrete pouring are facilitated, the construction quality can be greatly ensured, and the construction period can be greatly saved; additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention; the primary objects and other advantages of the invention may be realized and attained by the instrumentalities particularly pointed out in the specification.
Drawings
FIG. 1 is a schematic vertical sectional view of a precise positioning structure for pile connection;
FIG. 2 is a schematic cross-sectional view of a localized casting system with an adjustment tie;
FIG. 3 is a first schematic cross-sectional view of the connection of the control frame and the steel upright;
FIG. 4 is a schematic diagram of a second transverse section of the connection of the control frame and the steel upright;
FIG. 5 is a first schematic view of the hoisting of a steel column and a reinforcement cage;
FIG. 6 is a schematic diagram of hoisting a steel upright and a reinforcement cage;
FIG. 7 is a third schematic view of the hoisting of a steel column and a reinforcement cage;
FIG. 8 is a first cross-sectional view of the steel column for centering adjustment;
FIG. 9 is a second cross-sectional view of the center positioning adjustment of the steel column;
fig. 10 is a third transverse sectional view of the steel column for center positioning adjustment.
Reference numerals: 1-steel upright post, 2-bracket, 3-control frame, 31-control frame upright post, 32-control frame cross bar, 4-first jack, 5-pile casing, 6-second jack, 7-inclinometer pipe, 8-supporting platform, 9-bearing arm, 10-inclinometer, 11-verticality adjusting controller, 12-adjusting pull rod, 13-crane, 14-lifting rope, 15-reinforcement cage lifting lug, 16-reinforcement cage, 17-lifting rib, 18-, drilled pile, 19-steel upright post center, and 20-design center.
Detailed Description
Taking a certain commercial building as an example, the building comprises three underground layers, namely a first-layer parking garage, a facility room and two-layer commerce, and seven overground layers comprise a commerce and commercial management room and a storeroom. The overall construction process of the project adopts a full reverse construction method for construction, and underground continuous walls (two walls are integrated) are adopted at the periphery of a foundation pit as vertical enclosure structures. The topdown construction area utilizes structural beam panels as horizontal support members.
The engineering foundation design grade is grade A, the engineering piles are drilled concrete cast-in-place piles, the pile diameters are 1200mm and 1500mm, the total number is 131, the pile end bearing layer is (5) -2 stroke chemical andesite, and the length of the pile is about 23 m. The elevation of the foundation bottom plate is-15.7 m, the thickness of the bottom plate is 700mm, and the thickness of the local bottom plate is 900 mm. The engineering adopts a reinforced concrete frame structure, and the beam slab concrete grade of the basement structure is C35. The main floor is of a structure with a beam-slab concrete grade of C35, two or more layers of beam-slab concrete grades of C30, the frame columns are steel tube concrete columns, and the steel upright column concrete is C60. The engineering adopts the full reverse construction method for construction, steel upright columns (namely 'one column and one pile') are adopted between the pile top of the engineering pile and the negative layer of top plate, the steel upright columns are inserted 2 meters below the pile top, and the diameters of the steel pipes are phi 600, phi 700, phi 800 and phi 1000. The concrete strength grade of the pile body of the cast-in-situ bored pile is C40, and the concrete strength grade of the steel upright and the upper part of the pile body is C60.
As shown in fig. 1 to 10, a pile connection accurate positioning structure includes a steel column 1, a bored pile 18 connected below the steel column 1, a support platform 8 connected to the ground, a bearing arm 9 connected to the support platform 8 and detachably connected to the steel column 1, a control frame 3 connected to the support platform 8, a first jack 4 connected between the control frame 3 and the steel column 1 in the horizontal direction, a bracket 2 connected to the steel column 1, a casing 5 connected below the steel column 1 in the ground and located at the periphery of the steel column 1, a second jack 6 connected between the casing 5 and the steel column 1 in the horizontal direction, a verticality adjustment controller 11 connected to the first jack 4 and the second jack 6 and located on the ground, an inclinometer 7 connected to the outer side of the steel column 1, and an inclinometer 10 connected to the inclinometer 7 and located on the ground.
In the embodiment, the control frame 3 is made of section steel and comprises control frame upright rods 31 arranged in a square shape and control frame cross rods 32 connected to the tops of the control frame upright rods 31, the height of each control frame upright rod 31 is adapted to the installation elevation of the steel upright posts 1, the control frame cross rods 32 are horizontally shaped like a Chinese character 'hui', and reinforcing rods are connected between the two square shapes; the size of the square inside the control frame cross rod 32 corresponds to that of the steel upright post 1, connecting holes are arranged on the reinforcing rod between the two square shapes of the control frame cross rod 32 at intervals, and the connecting holes are detachably connected with the steel upright post 1 through adjusting pull rods 12.
In this embodiment, the first jacks 4 are detachably connected to the control frame upright rods 31 by bolts or screws and are symmetrically arranged on the ring of the steel upright 1 at intervals, the first jacks 4 are horizontally arranged, and the extension parts of the first jacks 4 are abutted to the outer wall of the steel upright 1; the extension part of the first jack 4 is connected with an arc cushion pad corresponding to the outer wall connection of the steel upright post 1.
In the embodiment, the fixed end of the second jack 6 is connected with the protective cylinder 5 and symmetrically arranged on the ring shape of the steel upright post 1 at intervals, the overhanging end is abutted with the outer wall of the steel upright post 1, and the overhanging part of the second jack 6 is connected with an arc-shaped cushion pad which is connected with the outer wall of the steel upright post 1 correspondingly; the first jack 4 and the second jack 6 are connected with the verticality adjusting controller 11 in parallel.
In the embodiment, the top end of the steel upright post 1 is provided with an ear plate, the middle upper part is provided with a bracket 2, and the middle lower part is also provided with a steel reinforcement cage lifting lug 15; lifting lugs on the steel upright 1 are connected with a crane 13 through lifting ropes 14 or detachably connected with a control frame 3 through adjusting pull rods 12, a bracket 2 is lapped at the top of the control frame 3, and lifting lugs 15 of a reinforcement cage are detachably connected with a prefabricated reinforcement cage 16 to be poured through lifting ribs 17. The bracket 2 is made of channel steel.
With reference to fig. 1 to 10, a pile connection accurate positioning structure and a construction method are further described, which specifically include the following steps:
the method comprises the following steps that firstly, before construction, a construction site is cleaned and leveled, a supporting platform 8 is designed, the gradient is not more than 1%, after the site is hardened, the steel stand column 1 is measured and positioned firstly before being installed, the plane position of the steel stand column 1 is determined, then a cross line is popped out on the site, after hole forming is carried out, slurry is cleaned, the cross line is rechecked, and the steel stand column 1 is ensured to be positioned accurately.
Because the basement of the project is constructed by adopting a reverse construction method, the elevation of the construction site of the steel upright post 1 pile is about +/-0.000, and the requirement on the flatness of the construction site is higher in order to ensure the verticality of the upright post pile, the construction site is cleaned, leveled and compacted before construction, wherein a supporting platform 8 is hardened by C20 concrete with the thickness of 200mm, and a hole with the diameter of 1.3 m is reserved in the middle; the water dispersion gradient is not more than 1% to prevent the inclination after loading.
Step two, customizing a steel pile casing 5 with the length of 4 meters according to the hole forming precision requirement and the verticality adjusting requirement, wherein the diameter of the pile casing 5 is not less than 20cm larger than that of a drilled pile 18, and the wall thickness is about 12 mm; processing and manufacturing the control frame 3, measuring the position of the control frame 3 again after the reinforcing cage 16 is put down after the hole is formed by the drilled pile 18, and controlling the central error within 5 mm; according to the positioning and mounting of the control frame 3, the steel upright post 1 positioning center line is measured and placed on a supporting platform 8 at the lower part of the control frame 3, and identification is carried out at the corresponding position to ensure that the positioning must be correct.
As shown in fig. 1 and 2, the upper part of the control frame 3 is in supporting connection with the bracket 2 of the steel upright 1, and the lower part is detachably connected with at least 4 first jacks 4 for centering and adjusting the axis of the steel upright 1 and fixing the steel upright 1, and the jacks serve as fulcrums in the verticality adjusting process; in addition, at least 4 second jacks 6 are arranged in the pile casing 5 and used for adjusting the verticality of the steel upright post 1 and serving as force action points in the verticality adjusting process; after the control frame 3 takes place, the elevation of the steel upright post 1 is determined according to measured data, the bracket 2 is welded on the position of the steel upright post 1 corresponding to the elevation, the steel upright post 1 is erected on the upper portion of the control frame 3 through the bracket 2 for adjusting the elevation, and in addition, a short steel bar is further arranged on the lower portion of the platform so as to adjust the inclination angle of the steel upright post 1.
For the reinforcement cage 16 in the second step, the reinforcement cage 16 includes three parts: a reinforcement cage 16 of a lower bored pile 18, a reinforcement cage 16 in a steel upright 1 pipe, and a reinforcement cage 16 of which the diameter is the same as that of the reinforcement cage 16 of the lower bored pile 18 at the outer side of the steel upright 1 pipe; the protective layer outside the reinforcement cage 16 is connected with a circular roller type concrete cushion block.
The lower drilling pile 18 steel reinforcement cage 16 is processed according to design requirements and different pile diameters in a steel reinforcement processing field in a classified mode, the whole cage can be manufactured near a pile hole and is hoisted to a wellhead at one time according to hole forming depth allocation and combined with field conditions, and n-shaped rings are welded at symmetrical positions of the top of the cage to be connected with the steel upright posts 1;
in the embodiment, the steel reinforcement cage 16 in the steel upright 1 is blanked according to the design, the steel reinforcement cage in the steel upright can be welded with the steel pipe, the double-sided welding is 5D, the single-sided welding is 10D, the double-sided welding is preferably adopted for uniform stress, the anchor bars outside the steel reinforcement cage are manufactured according to the design and extend into the tool post, and the top stiffening ribs can be properly amplified and attached to the inner diameter of the tool post for not influencing the up-and-down movement of the feeding pipe; the reinforcement cage 16 at the outer part of the steel upright 1 pipe is separately manufactured according to the design requirement, and the stiffening hoops are arranged at the outer side of the main reinforcement and connected with the lower reinforcement cage 16 at the hole opening.
In the embodiment, according to the characteristics that the steel upright column 1 is long and the length of the steel upright column anchored into the steel reinforcement cage 16 is long, the construction method that the steel upright column 1 is placed into the steel reinforcement cage 16 at first, after the top of the steel reinforcement cage 16 is basically flush with the top of a pile hole, the steel upright column 1 is hoisted in place, a section is inserted into the center of the pile hole in advance according to the design requirement, after the steel upright column 1 is inserted into the steel reinforcement cage 16 by 2000mm, the steel reinforcement cage 16 in the hole is lifted and sleeved on the outer side of the steel upright column 1 vertical to the hole for the second time by using the auxiliary hook on the arm of the crane 13 is adopted.
Thirdly, arranging an inclinometer pipe 7 on the side surface of the steel upright post 1, and fixing a central marking line of the steel upright post 1 of the inclinometer pipe 7 on the outer side of the steel upright post 1 during arrangement; the inclination measuring pipe 7 is arranged on the outer wall of the steel upright post 1, the upper circle center and the lower circle center of the inclination measuring pipe 7 and the center 19 of the steel upright post are kept on the same plane during installation, the distance between the two circle centers at the upper part is kept equal to the distance between the two circle centers at the lower part, and slight bending in the middle of the inclination measuring pipe has no influence on the measurement result; after the installation is finished, the center deviation (Xs3, Ys3) between the straight pipe and the steel upright post 1 is checked and measured, and the center deviation is qualified when both X s3 and Ys3 are less than or equal to 3 mm.
In the embodiment, after the steel column 1 is processed and transported to a construction site, the inclinometer pipe 7 begins to be installed, wherein the inclinometer pipe 7 is arranged on the side surface of the steel column, is 10 meters long and begins to be arranged 1 meter away from the top of the steel column; the inclinometer 7 is fixed by a special hoop, the hoops are arranged at intervals of 1 meter, and the inclinometer 7 is arranged to be parallel to the surface of the steel upright 1 and the axis of the steel upright 1. In order to ensure that the verticality of the steel tube can represent the placement verticality of the steel tube when the inclinometer tube 7 is tested, the inclinometer tube 7 is completely parallel to the steel tube, so that the bus of the steel tube is very important to find, the position of the bus is popped out by using ink lines on the outer side of a steel column when the steel tube leaves a factory, and the inclinometer tube 7 is strictly installed according to the direction of the ink lines when being installed.
Step four, during on-site construction, mechanically positioning and excavating to form a hole, pulling a cross line on the protective cylinder 5 before opening the hole, ensuring that the central position of a drill bit is consistent with the central position of the cross line, and drilling at a low gear and constant speed in the hole forming process; removing the hole forming machine, and finishing the orifice site again to ensure that the orifice facility and the steel pipe upright post do not sink after being installed; laying or pouring a supporting platform 8, arranging a circular hole corresponding to the steel upright 1 in the supporting platform 8, and arranging a control frame 3 on the supporting platform 8.
When the hole forming machine is in place, the hole forming machine should not collide with the protective cylinder 5 as much as possible, and the type and the size of a drill bit should be checked before hole forming. If a positive circulation drilling machine is selected for hole forming, the drilling machine with good perpendicularity and good drill rod rigidity is required to be adopted, and the base needs to be leveled by a horizontal ruler to achieve leveling and stability so as to ensure that the drilling machine does not incline or move; the allowable deviation of the center of the turntable and the center of the pile position is less than 10mm, and the levelness error of the turntable in four directions is less than 1/100. The drilling machine is in place and leveled, and three points of a pulley at the head of the tower frame of the drilling machine, the center of the rotary table and the pile position are on a vertical line. The body of the drilling machine must be stable and firm, and the drilling machine cannot be displaced or inclined in the construction process. Before drilling, full-load operation test machine and frame must be carried out, normal construction can be carried out after requirements are met, and the condition that the hole does not move or incline in the hole forming process must be guaranteed.
The height of a control frame upright rod 31 in the control frame 3 is adjusted to be leveled to the horizontal and is fixedly connected with the supporting platform 8; the supporting platform 8 and the straightening frame should be centered, and the center line of the protective cylinder 5, the center of the supporting platform 8, the center of the control frame 3 and the center of the pile position are ensured.
As shown in fig. 5 to 7, during construction, firstly, the crane 13 is used to hoist and transport the processed reinforcement cage 16 in place, then the center point of the pile hole is aligned, the reinforcement cage 16 is vertically and slowly placed into the pile hole, the top of the reinforcement cage 16 is placed to be about 500mm above the natural ground and 1000mm above the natural ground, the reinforcement cage 16 is temporarily fixed, and meanwhile, the reinforcement cage 16 is adjusted to ensure that the center of the reinforcement cage 16 is coincident with the center line of the pile hole; after the steel reinforcement cage 16 is in place and adjusted to be qualified, the crane 13 is adopted to transport and hoist the steel upright column 1 at the corresponding position, when the steel upright column is transported to the corresponding pile hole to be empty, the crane 13 is stabilized, then the relative distance between the steel upright column 1 and the pile hole is observed, then the steel upright column is slowly moved and in place according to the command, when the vertical line of the center 19 of the steel upright column and the pile hole are focused on the same vertical line, the steel upright column 1 is slowly hooked, the bottom of the steel upright column 1 is temporarily inserted into the steel reinforcement cage 16 in the hole, at the moment, the steel upright column 1 is slowly inserted, the insertion depth is not more than 2000mm, and then the steel upright column 1 is stopped from being inserted downwards.
When the length of the steel reinforcement cage 16 sleeved into the steel upright 1 meets the length and elevation of the design requirement, then hanging the steel reinforcement cage 16 hanging bars 17 on steel reinforcement cage lifting lugs 15 arranged in advance on the steel upright 1; after the steel bar cage lifting lugs 15 are hung on the lifting ribs 17, the crane 13 is started to lower the whole steel upright 1 according to the designed elevation; when the steel upright post 1 cannot be completely and accurately placed to the control elevation of the design requirement at one time in the lowering process of the steel upright post 1, the distance from the control elevation line on the steel upright post 1 and the control side line at the left and right positions on the supporting platform 8 to any side of the outer surface of the steel upright post 1 is inspected by observing the distance when the steel upright post 1 descends; at this moment, utilize first jack 4 in top and crane 13 to carry out slowly lifting steel stand 1, carry out the straightness condition that hangs down of steel stand 1 according to the straightness detector that hangs down of installation on the steel stand 1 shaft, start simultaneously and transfer controller 11 that hangs down, adjust the direction of steel stand 1 top and bottom.
For steel stud 1 and tool stud placement and adjustment:
splicing a steel upright post 1 and a steel pipe tool post on the ground, determining that the length of the steel upright post 1 inserted into the tool post is not less than 1m according to the elevation of an orifice, welding a small limiting iron block on the outer side of the steel upright post 1, ensuring that the circle center lines of two pipes are on the same straight line, and simultaneously temporarily solidifying the steel pipe upright post and the steel pipe tool post by using an adjustable turnbuckle to prevent the two pipes from falling off in the hoisting process and control the elevation of the steel upright post 1 to be used as an anchor bar of the steel upright post 1 after concrete is poured; in order to ensure smooth socket joint and disassembly of the tool column and the steel upright post 1, the inner side of the lower opening of the tool column is beveled, the inner side of the tool column and the outer side of the steel upright post 1 are polished necessarily, and a layer of butter is applied to the outer side of the steel upright post 1.
b, connecting the tool column and the steel upright column 1 to the center of the steel reinforcement cage 16 and placing the steel reinforcement cage to a corresponding position, wherein the height of the steel reinforcement cage 16 is 5cm higher than the design position, so that the steel upright column 1 does not bear the weight of the steel reinforcement after the steel reinforcement cage 16 is fixed through the orifice hanging rib 17.
c, lowering the steel upright column 1 and the steel reinforcement cage 16 to the position of the first jack 4, placing the jack of the first jack 4, lowering the position of the hanging rib 17 of the steel reinforcement cage 16, fixing the hanging rib 17 of the steel reinforcement cage 16 on the reinforced concrete base plate of the orifice, sequentially installing the second jack 6, and continuing lowering to the designed elevation.
d, adjusting and centering the horizontal position of the tool column through the first jack 4 on the crane 13 lifting hook steering, manual matching and control frame 3, rechecking by using a total station instrument in the process to ensure that the center of the tool column is consistent with the center of the pile position, retesting the channel steel carrying pole of the tool column by using a level gauge or a horizontal guiding rule to ensure that four corners of the channel steel carrying pole are horizontal, and limiting and fixing by using the jack.
e, respectively placing inclinometers 10 from 2 directions to measure the inclination of the steel pipe tool column, determining the adjustment direction according to the measured data, adjusting the position of the tool column through the second jack 6 until the verticality of the steel pipe tool column meets the design requirement, fixing the first jack 4 again, and rigidly fixing the steel pipe tool column and the control frame 3 in at least three directions.
Fifthly, as shown in fig. 8 to 9, after the steel upright 1 is hoisted in place, checking the axis and the verticality of the steel upright 1; before the operation step, a cross line 19 at the center of the steel upright post is popped above the orifice of the supporting platform 8; ensuring that the cross center line of the supporting platform 8 is coincident with the design center 20 for positioning the pile hole and the center point of the bottom guider, and the error is not more than 1mm, adopting a laser plummet instrument to ensure that the center point of the lower guider is coincident with the cross key two points at the top of the hole opening, and then marking a positioning center line and a mounting and positioning line of the control frame 3 on the supporting platform 8; after the crane 13 is adopted to hoist the steel upright post 1 to the position above the pile hole, the lifting rope 14 at the top of the steel upright post 1 is not detached at first, so that the steel upright post 1 is prevented from sliding downwards.
And step six, during vertical control adjustment, the vertical control system measures the verticality of the steel upright post 1 by adopting the inclinometer pipe 7, and applies lateral thrust to the steel upright post 1 through the first jack 4 on the control frame 3, so that the inclination angle of the steel upright post 1 is changed, and the verticality of the steel upright post 1 meets the requirement.
After the steel upright post 1 is centered, a verticality monitoring probe is placed in an inclinometer tube 7, the probe slides into the tube along a cross slot in a PVC tube through a cable, data are collected in two axial directions every 0.5 meter, 80 data are collected in total, and a verticality initial curve is drawn; and then, putting the verticality monitoring probe into the inclinometer 7 again, monitoring in real time, judging the offset of the steel upright 1 according to the initial curve until the verticality meets the requirement of being less than 1/500, striving to achieve the target of being less than 1/600, adjusting the first jack 4 and/or the second jack 6 for adjustment until the verticality meets the design requirement, and fixing the steel upright 1 by using the first jack 4 and the second jack 6.
The upper part of the steel upright post 1 is also provided with a guide post, the control frame 3 is connected with the guide post through an adjusting pull rod 12, and when the first jack 4 and the second jack 6 cannot or have a small adjusting effect, the adjusting pull rod 12 is adopted to be combined with the jacks to adjust the verticality until the requirements are met.
In addition, when the elevation and the verticality of the steel upright 1 meet the requirements, the top of the steel upright 1 is fixed, the steel upright 1 is fixedly connected with a bearing arm 9 which is connected with the steel upright 1 in advance by utilizing a steel plate which is pre-embedded by a supporting platform 8, and the steel upright 1 is controlled to float upwards and move leftwards and rightwards in the concrete pouring process; after concrete is poured, the control frame 3 and the corresponding positioning structure are removed, the bearing arm 9 is reserved, and meanwhile, the top control frame 3 tightly fixes the top end of the steel upright post 1 in the pouring construction process, so that the steel upright post 1 is guaranteed not to deform in the concrete pouring construction process.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that may be made by those skilled in the art within the technical scope of the present invention will be covered by the scope of the present invention.
Claims (10)
1. A pile connection accurate positioning structure is characterized by comprising a steel upright post (1), a drilling pile (18) connected below the steel upright post (1), a supporting platform (8) connected on the ground, a bearing arm (9) connected on the supporting platform (8) and detachably connected with the steel upright post (1), a control frame (3) connected on the supporting platform (8), a first jack (4) connected between the control frame (3) and the steel upright post (1) in the horizontal direction, a bracket (2) connected on the steel upright post (1), a pile casing (5) connected below the ground of the steel upright post (1) and positioned at the periphery of the steel upright post (1), a second jack (6) connected between the pile casing (5) and the steel upright post (1) in the horizontal direction, and a verticality adjusting controller (11) connected with the first jack (4) and the second jack (6) and positioned on the ground, the inclination measuring pipe (7) is connected to the outer side of the steel upright post (1), and the inclinometer (10) is connected with the inclination measuring pipe (7) and is positioned on the ground;
control frame (3) contain and are square accuse frame pole setting (31) of arranging and connect in accuse frame horizontal pole (32) at accuse frame pole setting (31) top, accuse frame pole setting (31) highly adapt to steel stand (1) installation elevation.
2. The pile connection accurate positioning structure of claim 1, wherein the control frame cross bar (32) is horizontally shaped like a Chinese character 'hui' and a reinforcing rod is connected between the two square characters; the size of the square in the inner part of the control frame cross rod (32) corresponds to that of the steel upright post (1), connecting holes are arranged on the reinforcing rod between two square shapes of the control frame cross rod (32) at intervals, and the connecting holes are detachably connected with the steel upright post (1) through an adjusting pull rod (12).
3. The pile connection accurate positioning structure is characterized in that the first jacks (4) are detachably connected to the control frame vertical rods (31) and are symmetrically arranged on the ring of the steel upright (1) at intervals, the first jacks (4) are horizontally arranged, and the extending parts of the first jacks (4) are jacked to the outer wall of the steel upright (1); the extension part of the first jack (4) is connected with an arc cushion pad corresponding to the outer wall connection of the steel upright post (1).
4. The pile connection accurate positioning structure is characterized in that the fixed end of the second jack (6) is connected with the pile casing (5) and symmetrically arranged on the ring shape of the steel upright (1) at intervals, the overhanging end is abutted with the outer wall of the steel upright (1), and the overhanging part of the second jack (6) is connected with an arc-shaped cushion pad corresponding to the outer wall of the steel upright (1); the first jack (4) and the second jack (6) are connected in parallel with the verticality adjusting controller (11).
5. The pile column connection accurate positioning structure according to claim 1, wherein the top end of the steel upright column (1) is provided with an ear plate, the middle upper part is provided with a bracket (2), and the middle lower part is further provided with a reinforcement cage lifting lug (15); lifting lugs on the steel upright post (1) are connected with a crane (13) through lifting ropes (14) or detachably connected with a control frame (3) through adjusting pull rods (12), a bracket (2) is lapped at the top of the control frame (3), and lifting lugs (15) of a reinforcement cage are detachably connected with a prefabricated reinforcement cage (16) to be poured through lifting ribs (17).
6. The construction method of the pile connection accurate positioning structure according to any one of claims 1 to 5, characterized by comprising the following steps:
firstly, cleaning and leveling a construction site before construction, designing a supporting platform (8) with the gradient not exceeding 1%, measuring and positioning the steel stand column (1) after the site is hardened before installation, determining the plane position of the steel stand column (1), then popping out a cross line on the site, cleaning slurry after hole forming, and rechecking the cross axis to ensure that the steel stand column (1) is accurately positioned;
step two, customizing a pile casing (5) according to the hole forming precision requirement and the verticality adjusting requirement, wherein the diameter of the pile casing (5) is not less than 20cm larger than that of the drilled pile (18); processing and manufacturing the control frame (3), after the hole of the pile (18) to be drilled is formed, lowering the steel reinforcement cage (16), and then measuring the position of the control frame (3) again, wherein the central error is controlled within 5 mm; according to the positioning and mounting of the control frame (3), the steel upright post (1) positioning center line is measured and placed on a supporting platform (8) at the lower part of the control frame (3), and the mark is carried out at the corresponding position to ensure that the positioning must be correct;
the upper part of the control frame (3) is in supporting connection with the bracket (2) of the steel upright post (1), and the lower part of the control frame is detachably connected with at least 4 first jacks (4) which are used for centering and adjusting the axis of the steel upright post (1) and fixing the steel upright post (1) and are used as fulcrums in the verticality adjusting process; in addition, at least 4 second jacks (6) are arranged in the pile casing (5) and are used for adjusting the verticality of the steel upright (1) and serving as force action points in the verticality adjusting process; after the control frame (3) is in place, determining the elevation of the steel upright post (1) according to measured data, welding a bracket (2) at the position of the steel upright post (1) corresponding to the elevation, erecting the steel upright post (1) on the upper part of the control frame (3) through the bracket (2) for adjusting the elevation, and arranging a short steel bar at the lower part of the platform so as to adjust the inclination angle of the steel upright post (1);
thirdly, arranging an inclinometer pipe (7) on the side surface of the steel upright (1), and fixing a mark line of the center (19) of the steel upright of the inclinometer pipe (7) on the outer side of the steel upright (1) during arrangement; the inclination measuring pipe (7) is arranged on the outer wall of the steel upright post (1), the upper circle center and the lower circle center of the inclination measuring pipe (7) are kept on the same plane with the center (19) of the steel upright post during installation, the distance between the two circle centers at the upper part is kept equal to the distance between the two circle centers at the lower part, and slight bending in the middle of the inclination measuring pipe does not influence the measurement result; after the installation is finished, the circle center deviation (Xs3, Ys3) between the straight pipe and the steel upright post (1) is checked and measured, and the circle center deviation is qualified when both X s3 and Ys3 are less than or equal to 3 mm;
fourthly, during on-site construction, mechanically positioning and excavating to form a hole, pulling a cross line on the protective cylinder (5) before opening the hole, ensuring that the central position of the drill bit is consistent with the central position of the cross line, and drilling at a low gear and uniform speed in the hole forming process; removing the hole forming machine, and finishing the orifice site again to ensure that the orifice facility and the steel pipe upright post do not sink after being installed; a supporting platform (8) is placed or poured, a circular hole is formed in the supporting platform (8) and corresponds to the mounting steel upright (1), and a control frame (3) is mounted on the supporting platform (8);
the height of a control frame upright rod (31) in the control frame (3) is adjusted to be leveled to the horizontal and is fixedly connected with the supporting platform (8); the supporting platform (8) and the straightening frame are centered and guaranteed to be 'four-center one' (the center line of the pile casing (5), the center of the supporting platform (8), the center of the control frame (3) and the center of the pile position);
fifthly, after the steel upright (1) is hoisted in place, checking the axis and the verticality of the steel upright (1); before the operation step is carried out, a crisscross line of the center (19) of the steel upright post is shot above the hole of the supporting platform (8); ensuring that the cross center line of the supporting platform (8) is coincident with the design center (20) for positioning the pile hole and the center point of the bottom guider, ensuring that the error is not more than 1mm, adopting a laser plummet instrument to ensure that the center point of the lower guider is coincident with the cross key two points at the top of the hole opening, and then marking out the positioning center line and a mounting positioning line of the control frame (3) on the supporting platform (8); after the steel upright post (1) is hoisted to the position above the pile hole by adopting a crane (13), a hoisting rope (14) at the top of the steel upright post (1) is not detached at first, so that the steel upright post (1) is prevented from sliding downwards;
step six, during vertical control adjustment, the vertical control system measures the verticality of the steel upright (1) by adopting an inclinometer (7), and applies lateral thrust to the steel upright (1) through a first jack (4) on the control frame (3) so as to change the inclination angle of the steel upright (1) and enable the verticality of the steel upright (1) to meet the requirement;
after the steel upright post (1) is centered, a verticality monitoring probe is placed in an inclinometer tube (7), the probe slides into the tube along a cross groove in a PVC tube through a cable, at least one datum is acquired every 0.5 meter in two axial directions, and a verticality initial curve is drawn; then, the verticality monitoring probe is placed into the inclinometer tube (7) again, real-time monitoring is carried out, the offset of the steel upright (1) is judged according to the initial curve, the first jack (4) and/or the second jack (6) are adjusted to be calibrated until the verticality meets the design requirement, and the steel upright (1) is fixed by the first jack (4) and the second jack (6);
the upper part of the steel upright post (1) is also provided with a guide post, the control frame (3) is connected with the guide post through an adjusting pull rod (12), and when the first jack (4) and the second jack (6) cannot be adjusted or the adjusting effect is not large, the adjusting pull rod (12) is adopted to be combined with the jacks to adjust the verticality until the requirements are met.
7. The construction method of the precise positioning structure for pile-column connection according to claim 6, wherein for the reinforcement cage (16) in the second step, the reinforcement cage (16) comprises three parts: the steel reinforcement cage (16) of the lower drilling pile (18), the steel reinforcement cage (16) in the steel upright (1) and the steel reinforcement cage (16) with the same diameter as the steel reinforcement cage (16) of the lower drilling pile (18) on the outer side of the steel upright (1) pipe; the protective layer on the outer side of the reinforcement cage (16) is connected with a circular roller type concrete cushion block;
the lower drilling pile (18) is a reinforcement cage (16), the reinforcement cage is processed according to design requirements and different pile diameters in a reinforcement processing field in a classified mode, the reinforcement cage can be manufactured near a pile hole to be hoisted to a wellhead at one time according to hole forming depth allocation and combined with site conditions, and n-shaped rings are welded at symmetrical positions of the top of the cage to be connected with the steel upright column (1);
the steel reinforcement cage (16) in the steel upright (1) pipe is blanked according to the design, the steel reinforcement cage in the pipe can be welded with the steel pipe, the double-sided welding is 5D, the single-sided welding is 10D, the double-sided welding is preferably adopted for uniform stress, the anchor bars outside the pipe are made into a cage shape according to the design and extend into the tool post, and the most top stiffening ribs can be properly amplified and attached to the inner diameter of the tool post for not influencing the up-and-down movement of the feeding pipe;
the reinforcement cage (16) at the outer part of the steel upright post (1) pipe is separately manufactured according to the design requirement, and the stiffening hoops are arranged at the outer side of the main reinforcement and connected with the reinforcement cage (16) at the lower part at the orifice.
8. The construction method of the pile-column connection accurate positioning structure according to claim 7, characterized in that according to the characteristics of long steel column (1) and long length anchored into the reinforcement cage (16), the construction method is adopted that the steel column (1) is firstly placed into the reinforcement cage (16), then the steel column (1) is hoisted in place after the top of the reinforcement cage (16) is basically flush with the top of the pile hole, a section is firstly inserted into the center of the pile hole according to the design requirement, after the steel column (1) is inserted into the reinforcement cage (16) by 2000mm, the steel cage (16) in the pile hole is secondarily lifted and sleeved into the outer side of the steel column (1) vertical to the hole by using the attachment hook on the arm of the crane (13);
during construction, firstly, hoisting and transporting the processed reinforcement cage (16) in place by using a crane (13), then, aligning the central point of the pile hole, vertically and slowly placing the reinforcement cage into the pile hole, placing the top of the reinforcement cage (16) 500mm higher than the natural ground and 1000mm higher than the natural ground, temporarily fixing the reinforcement cage (16), and simultaneously adjusting the reinforcement cage (16) to ensure that the center of the reinforcement cage (16) is superposed with the central line of the pile hole; after the steel reinforcement cage (16) is in place and adjusted to be qualified, the crane (13) is used for transporting and hoisting the steel upright post (1) at the corresponding position, when the steel upright post is transported to the corresponding pile hole to be empty, the crane (13) is stabilized, then the relative distance between the steel upright post (1) and the pile hole is observed, then the steel upright post is slowly moved and in place according to commands, when the vertical line of the center (19) of the steel upright post and the pile hole are emphasized on the same vertical line, the steel upright post is slowly hooked, the bottom of the steel upright post (1) is temporarily inserted into the steel reinforcement cage (16) in the hole, at the moment, the steel upright post (1) is slowly inserted, the inserting depth does not exceed 2000mm, and then the steel upright post (1) is stopped from being inserted downwards.
9. The construction method of the pile-column connection accurate positioning structure according to claim 8, characterized in that when the length of the steel reinforcement cage (16) sleeved into the steel upright (1) meets the length and elevation of the design requirement, then the suspension bars (17) of the steel reinforcement cage (16) are hung on the steel reinforcement cage lifting lugs (15) preset on the steel upright (1); after the steel bar cage is hung on a lifting lug (15) of a steel bar cage through a lifting rib (17), a crane (13) is started to lower the whole steel upright (1) according to a designed elevation; when the steel upright post (1) is placed downwards, the steel upright post (1) cannot be completely and accurately placed to a control elevation required by design at one time, and the distance from a control elevation line on the steel upright post (1) and a control sideline at the left position and the right position on the supporting platform (8) to any side of the outer surface of the steel upright post (1) is inspected by observing the descending of the steel upright post (1); at the moment, the first jack (4) at the top and the crane (13) are utilized to slowly lift the steel column (1), the verticality of the steel column (1) is detected according to the verticality detector arranged on the column body of the steel column (1), the verticality adjusting controller (11) is started simultaneously, and the directions of the top and the bottom of the steel column (1) are adjusted.
10. The construction method of the pile connection accurate positioning structure according to claim 6, characterized in that when the elevation and the verticality of the steel upright (1) are corrected to meet the requirements, the top of the steel upright (1) is fixed, the steel upright (1) is fixedly connected with a bearing arm (9) which is connected with the steel upright (1) in advance by utilizing a steel plate embedded in a supporting platform (8), and the steel upright (1) is controlled to float upwards and move leftwards and rightwards in the concrete pouring process; after concrete is poured, the control frame (3) and the corresponding positioning structure are detached, the bearing arm (9) is reserved, and meanwhile, the top end of the steel upright post (1) is tightly fixed by the top control frame (3) in the pouring construction process, so that the steel upright post (1) is guaranteed not to deform in the concrete pouring construction process.
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| CN114703834A (en) * | 2022-05-06 | 2022-07-05 | 江苏南通二建集团有限公司 | Lattice column hoisting precision control construction method |
| CN114703862A (en) * | 2022-03-30 | 2022-07-05 | 中交(南京)建设有限公司 | Vertical and rapid positioning device for mounting latticed column and mounting and positioning method |
| CN114718053A (en) * | 2022-03-23 | 2022-07-08 | 深圳市工勘岩土集团有限公司 | Method for installing and positioning foundation pit steel stand column by reverse construction method and installation structure |
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| CN114718053A (en) * | 2022-03-23 | 2022-07-08 | 深圳市工勘岩土集团有限公司 | Method for installing and positioning foundation pit steel stand column by reverse construction method and installation structure |
| CN114703862A (en) * | 2022-03-30 | 2022-07-05 | 中交(南京)建设有限公司 | Vertical and rapid positioning device for mounting latticed column and mounting and positioning method |
| CN114703834A (en) * | 2022-05-06 | 2022-07-05 | 江苏南通二建集团有限公司 | Lattice column hoisting precision control construction method |
| CN115198738A (en) * | 2022-07-06 | 2022-10-18 | 深圳市工勘岩土集团有限公司 | Offshore platform steel sleeve reinforcement cage and hydraulic jack combined positioning construction method |
| CN115434527A (en) * | 2022-09-28 | 2022-12-06 | 中建科工集团有限公司 | Steel upright guide frame and construction method thereof |
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