CN111962506A - Collimating pile structure and construction method - Google Patents
Collimating pile structure and construction method Download PDFInfo
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- CN111962506A CN111962506A CN202010820661.4A CN202010820661A CN111962506A CN 111962506 A CN111962506 A CN 111962506A CN 202010820661 A CN202010820661 A CN 202010820661A CN 111962506 A CN111962506 A CN 111962506A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/66—Mould-pipes or other moulds
- E02D5/665—Mould-pipes or other moulds for making piles
Abstract
The utility model relates to a collimation pile structure and a construction method, relating to the technical field of construction of collimation piles of building foundations, wherein the collimation pile structure comprises an outer protective cylinder, an inner protective cylinder arranged inside the outer protective cylinder, a wall protecting cylinder arranged at the upper part of the outer protective cylinder, a steel reinforcement cage arranged inside the inner protective cylinder, a pouring cover body positioned at the top of the steel reinforcement cage and a sealing cover positioned at the upper port of the wall protecting cylinder; the outer pile casing, the inner pile casing and the reinforcement cage are concentrically arranged in the pile holes, the pile holes comprise a first pile hole positioned at the upper part and a second pile hole positioned at the lower part of the first pile hole and concentrically arranged with the first pile hole, and the diameter of the first pile hole is larger than that of the second pile hole; the outer protective cylinder and the inner protective cylinder are positioned in the first pile hole, and the reinforcement cage penetrates through the first pile hole and the second pile hole; the inner part of the inner casing is used for pouring concrete; the construction method adopts the collimation pile structure. The application can improve the technical problems that the stress of the collimation pile is uneven and easy to deform, and achieves the effects of ensuring that the stress of the outer pile casing and the stress of the inner pile casing are even and improving the coaxiality.
Description
Technical Field
The application relates to the technical field of construction of building foundation alignment piles, in particular to an alignment pile structure and a construction method.
Background
The collimation stake is used for carrying out accurate location to equipment or building, in some projects, in order to satisfy the accurate location to equipment or building, need set up the collimation stake in whole building garden or device building.
At present, the collimation stake generally adopts the structure of two casings, but present collimation stake, the bottom design of the inside and outside casing is the mode of dislocation arrangement, leads to inside and outside casing bottom stress situation different, can not guarantee the straightness and the axiality of hanging down of the inside and outside casing, and the fastness of inside and outside casing and basic connection is not good, and the inside and outside casing takes place structural deformation easily in installation and use, and the installation degree of difficulty is big and stability is not enough.
In view of the above related technologies, the inventor considers that the existing collimating pile is stressed unevenly and is easy to deform, and cannot meet the design and actual requirements.
Disclosure of Invention
In order to solve the problems that the stress of the collimating pile is uneven and deformation is easy to occur, the application provides a collimating pile structure and a construction method.
In a first aspect, the present application provides a collimating pile structure, which adopts the following technical scheme:
a collimation pile structure comprises an outer protective cylinder, an inner protective cylinder arranged inside the outer protective cylinder, a wall protecting cylinder arranged at the upper part of the outer protective cylinder, a steel reinforcement cage arranged inside the inner protective cylinder, a pouring cover body positioned at the top of the steel reinforcement cage and a sealing cover positioned at the upper port of the wall protecting cylinder; the outer pile casing, the inner pile casing and the reinforcement cage are concentrically arranged in pile holes, the outer pile casing is connected with the inner pile casing through fixing parts, the pile holes comprise first pile holes positioned at the upper parts and second pile holes positioned at the lower parts of the first pile holes and concentrically arranged with the first pile holes, and the diameter of each first pile hole is larger than that of each second pile hole; the outer pile casing and the inner pile casing are positioned in the first pile hole, and the reinforcement cage penetrates through the first pile hole and the second pile hole; the inner part of the inner casing is used for pouring concrete.
By adopting the technical scheme, the bottom parts of the prefabricated outer pile casing and the prefabricated inner pile casing are abutted against the shoulder of the connecting part of the first pile hole and the second pile hole, so that the bottom parts of the outer pile casing and the inner pile casing are uniformly stressed, the verticality and the coaxiality of the outer pile casing and the inner pile casing are more easily ensured, and the inner pile casing are not easy to deform in the process of installing the inner pile casing and the outer pile casing; protect the inside of a section of thick bamboo including steel reinforcement cage sets up with one heart, through inwards protecting a section of thick bamboo internal pouring concrete, make steel reinforcement cage and interior guard cylinder shape structure as an organic whole, the structure is more reliable and more stable.
Preferably, the inner casing and the outer casing are prefabricated parts, and a positioning structure for positioning the outer casing and the inner casing is arranged between the outer casing and the inner casing during prefabricated assembly.
Through adopting above-mentioned technical scheme, set up location structure between protecting a section of thick bamboo and outer protecting section of thick bamboo including, can guarantee to protect a section of thick bamboo and outer protecting section of thick bamboo in the pairing and hoist axiality and the straightness that hangs down when getting into the stake hole between.
Preferably, the positioning structure comprises a plurality of layers of positioning components arranged at intervals along the axial direction of the outer casing; the positioning assembly comprises a plurality of positioning rods which are vertically inserted into through holes formed in the wall of the outer protective barrel, and adjusting pieces which are connected with the positioning rods and used for adjusting the depth of the positioning rods inserted into the through holes, the adjusting pieces are in threaded connection with the positioning rods, the positioning rods are uniformly distributed along the circumferential direction of the outer protective barrel at intervals, one end of each positioning rod is abutted to the outer wall of the inner protective barrel, and the other end of each positioning rod extends out of the outer wall of the outer protective barrel.
By adopting the technical scheme, the inner protective sleeve and the outer protective sleeve are radially positioned by a plurality of layers of positioning assemblies which are uniformly distributed at intervals along the axial direction of the outer protective sleeve, a plurality of positioning rods which are radially positioned along the outer protective sleeve are arranged in each layer of positioning assemblies, the adjusting piece is fixedly welded in the through hole and is a nut, the positioning rods are in threaded connection with the nut, the end parts of the positioning rods are abutted with the outer wall of the inner protective sleeve, the positioning rods are screwed to adjust the length of the positioning rods extending out of the outer protective sleeve and lock the positions of the positioning rods, so that the position of the inner protective sleeve relative to the position of the outer protective sleeve in the radial direction is adjusted, and the plurality of positioning rods are cooperatively matched to ensure the coaxiality and the verticality of the inner protective sleeve and the outer protective sleeve, so that the coaxiali; in the hoisting process of the pile casing, the jacking force of the positioning rods on the inner pile casing always exists, and the positioning rods are uniformly distributed at intervals along the axial direction of the pile casing, so that the jacking force of the positioning rods on the inner pile casing is ensured, the inner pile casing and the outer pile casing are relatively fixed in the radial direction, and the coaxiality and the verticality of the inner pile casing and the outer pile casing are ensured not to change.
Preferably, each layer of the positioning assembly comprises six positioning rods.
Through adopting above-mentioned technical scheme, set up six locating levers, guarantee that the locating lever has sufficient top grafting power to protecting a section of thick bamboo internally, guarantee to protect a axiality between section of thick bamboo and the outer protection section of thick bamboo.
Preferably, the distance between adjacent positioning components is 1000mm-2000 mm.
By adopting the technical scheme, when the inner protective cylinder and the outer protective cylinder are assembled, a group of positioning assemblies are arranged at intervals of 1000-2000 mm along the axial direction of the outer protective cylinder, so that the coaxiality between the inner protective cylinder and the outer protective cylinder is continuously adjusted in the assembling process of the inner protective cylinder and the outer protective cylinder, the inner protective cylinder is abutted and applied with force by the groups of positioning assemblies, and the coaxiality and the verticality of the inner protective cylinder and the outer protective cylinder in a pile hole are ensured.
Preferably, the pouring cover body comprises a pouring top plate, a pouring top plate protective cover arranged on the upper part of the pouring top plate and a plurality of anchor bars vertically fixed on the lower part of the pouring top plate; the outer surface of the upper portion of each anchor bar is provided with an external thread, and the anchor bars and the pouring top plate are fixed through nuts.
Through adopting above-mentioned technical scheme, can make things convenient for the hoist and mount of steel reinforcement cage on the one hand, on the other hand can conveniently pour for steel reinforcement cage and interior protective barrel are through pouring that cement is fixed more firm, and the above-mentioned anchor bar of pouring the lid stretches into the inside of steel reinforcement cage, and the messenger pours and fixes more firmly reliably between lid and the steel reinforcement cage.
Preferably, the anchor bars are respectively arranged on two concentric rings, and the anchor bars are arranged on the two rings in a staggered manner.
Through adopting above-mentioned technical scheme for the atress of pouring between apron and the steel reinforcement cage is more even, and connects more firmly, guarantees to pour the fixed between apron and the steel reinforcement cage.
Preferably, a sealing ring is arranged between the sealing cover and the upper end of the wall protecting cylinder, the sealing ring comprises a circular bottom plate connected with the lower surface of the sealing cover and a circular side plate connected with the side surface of the sealing cover, and the bottom plate is vertically connected with the side plate.
Through adopting above-mentioned technical scheme, add the sealing ring between the upper end of sealed lid and a protecting wall section of thick bamboo, the sealed lid of mainly used bearing avoids sealed lid and protects a section of thick bamboo top and outside soil layer direct contact outward, wearing and tearing protect a wall section of thick bamboo and sealed lid to more importantly, through setting up the sealing ring, can guarantee the levelness of sealed lid installation, and the installation location is more convenient.
In a second aspect, the present application provides a method for constructing a collimating pile structure, which uses the collimating pile structure as described in any one of the above embodiments, including the following steps:
step 6, hoisting a reinforcement cage: pumping out the slurry in the second pile hole, and dropping the reinforcement cage into the pile hole through a crane to enable the height of the upper end of the reinforcement cage to be consistent with that of the upper end of the inner protection cylinder;
and 8, mounting a wall protecting cylinder and a sealing cover.
Preferably, in the step 3, in the process of hoisting the inner protective cylinder and the outer protective cylinder into the pile hole, when each layer of positioning structure is close to the upper part of the pile hole, the positioning structure on the layer is removed, and after the hole is welded and blocked, the anti-corrosion treatment is carried out.
Through adopting above-mentioned technical scheme for the in-process of protecting a section of thick bamboo and protecting a section of thick bamboo hoist and mount has guaranteed the axiality requirement of the two in carrying out, and gradually realize including protecting a section of thick bamboo and protecting a section of thick bamboo after getting into the stake hole, gradually demolish location structure, have certain independence between the section of thick bamboo that protects in making and protecting a section of thick bamboo, the independent space between section of thick bamboo and the outer section of thick bamboo is protected in guaranteeing, the atress is steady and even, protect a section of thick bamboo and outer section of thick bamboo in can avoiding and take place deformation, firm in connection is reliable, the location is accurate.
To sum up, the application comprises the following beneficial technical effects:
the problem that the collimation pile is uneven in stress and prone to deformation is solved, the technical effects that the bottoms of the outer protective cylinder and the inner protective cylinder are even in stress and not prone to deformation, and the perpendicularity and coaxiality of the outer protective cylinder and the inner protective cylinder are guaranteed.
Drawings
FIG. 1 is a schematic structural diagram of a collimating pile structure provided in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a positioning structure connecting an inner casing and an outer casing in an alignment pile structure according to an embodiment of the present disclosure;
FIG. 3 is a view A-A of FIG. 2;
FIG. 4 is a schematic view of the construction of the pouring cap of FIG. 1;
FIG. 5 is a top view of FIG. 4;
fig. 6 is a schematic perspective view of fig. 4.
In the figure: 1. sealing cover, 2, sealing ring, 3, first stake hole, 4, pour the lid, 41, pour the roof visor, 42, bolt, 43, pour the roof, 44, third nut, 45, anchor bar, 5, interior protective barrel, 6, steel reinforcement cage, 61, spiral hoop, 62, the hoop of putting more energy into, 7, outer protective barrel, 8, second stake hole, 9, the slightly weathering basement rock stratum, 10, soil horizon, 11, plain concrete layer, 12, tunnel floor, 13, locating component, 131, locating lever, 132, regulating part, 133, handle, 14, mounting, 15, hoisting support, 16, lug, 17, the wall-protecting section of thick bamboo.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
The embodiment of the application firstly discloses a collimating pile structure, and as shown in fig. 1, the collimating pile structure comprises an outer casing 7, an inner casing 5 arranged inside the outer casing 7, a wall casing arranged at the upper part of the outer casing 7, a reinforcement cage 6 arranged inside the inner casing 5, a pouring cover body 4 positioned at the top of the reinforcement cage 6 and a sealing cover 1 positioned at the upper port of the outer casing 7; the outer pile casing 7, the inner pile casing 5 and the reinforcement cage 6 are concentrically arranged in pile holes, the outer pile casing 7 is connected with the inner pile casing 5 through fixing pieces, the fixing pieces are two and can be annular supporting plates welded at the top end and the bottom end of the outer pile casing 7 and the inner pile casing 5 respectively, the pile holes comprise a first pile hole 3 positioned at the upper part and a second pile hole 8 positioned at the lower part of the first pile hole 3 and concentrically arranged with the first pile hole 3, the diameter of the first pile hole 3 is larger than that of the second pile hole 8, and a shoulder is formed at the connecting part of the first pile hole 3 and the second pile hole 8; the outer protective cylinder 7 and the inner protective cylinder 5 are located in the first pile hole 3, the bottom ends of the outer protective cylinder 7 and the inner protective cylinder 5 are abutted to the shoulder, the reinforcement cage 6 penetrates through the first pile hole 3 and the second pile hole 8, the reinforcement cage 6 comprises a spiral hoop 61 with a spiral outer part and a plurality of stiffening hoops 62 with a horizontal circular ring shape, the stiffening hoops 62 are arranged at intervals along the axial direction of the spiral hoop, and the stiffening hoops 62 are fixed outside the spiral hoop 61 in a surrounding mode; the height of the upper top end of the reinforcement cage 6 is consistent with that of the upper top end of the inner protective barrel 5; the inner casing 5 is used for casting concrete.
In the embodiment, two concentric pile holes are arranged, namely a first pile hole 3 and a second pile hole 8, the exterior of the pile holes sequentially comprises a slightly weathered base rock layer 9, a soil layer 10, a plain concrete layer 11 and a tunnel bottom plate 12 from bottom to top, the second pile hole 8 is positioned on the soil layer 10 and the slightly weathered base rock layer 9, the first pile hole 3 is positioned on the soil layer 10 and the plain concrete layer 11, the upper end of the first pile hole 3 extends out of the tunnel bottom plate 12, the bottoms of the prefabricated outer pile casing 7 and the prefabricated inner pile casing 5 are abutted against a shoulder of a connecting part of the first pile hole 3 and the second pile hole 8, so that the bottoms of the outer pile casing 7 and the inner pile casing 5 are uniformly stressed, the perpendicularity and the coaxiality of the outer pile casing 7 and the inner pile casing 5 are more easily ensured, and the inner pile casing 5 and the outer pile casing 7 are not easily deformed in the process of installing the inner pile casing 5 and the outer pile casing 7; protect a 5 inside including steel reinforcement cage 6 sets up with one heart, protect a 5 internally poured concrete through inside, make steel reinforcement cage 6 and interior protect a 5 structure that forms an organic whole, the structure is more reliable and more stable.
The problem that the collimation pile is uneven in stress and prone to deformation is solved, and the technical effect of improving firmness and stability of the collimation pile can be achieved.
Referring to fig. 2 and 3, as a specific embodiment of the collimating pile structure provided by the present application, the inner protecting cylinder 5 and the outer protecting cylinder 7 are prefabricated components, and when the prefabricated components are assembled, a positioning structure for positioning the outer protecting cylinder 7 and the inner protecting cylinder 5 is disposed between the outer protecting cylinder 7 and the inner protecting cylinder 5; the positioning structure comprises a plurality of layers of positioning components 13 which are arranged at intervals along the axial direction of the outer casing; locating component 13 includes that a plurality of is pegged graft perpendicularly and is equipped with the locating lever 131 in the through-hole on the section of thick bamboo wall of protecting section of thick bamboo 7 outward and is connected and be used for adjusting the regulating part 132 of the degree of depth that locating lever 131 inserted in the through-hole with locating lever 131, and is concrete, regulating part 132 is the nut, is equipped with the external screw thread on the body of rod of locating lever 131, regulating part 132 passes through threaded connection with locating lever 131, a plurality of locating lever 131 is along the circumference interval equipartition of protecting section of thick bamboo 7 outward, the one end of locating lever 131 and the outer wall apical grafting of interior protecting section of thick bamboo 5, the other.
In the embodiment, the coaxiality and the verticality between the inner protective cylinder 5 and the outer protective cylinder 7 can be ensured by additionally arranging the positioning structure between the inner protective cylinder 5 and the outer protective cylinder 7; the positioning structure adopts a plurality of layers of positioning components 13, a plurality of layers of positioning components 13 are uniformly distributed at intervals along the axial direction of the outer protective cylinder 7 and are used for radially positioning the inner protective cylinder 5 and the outer protective cylinder 7, a plurality of positioning rods 131 are arranged in each layer of positioning components 13 along the radial direction of the outer protective cylinder 7, the adjusting pieces 132 are fixedly welded in the through holes, the adjusting pieces 132 are nuts, the positioning rods 131 are in threaded connection with the nuts, the end parts of the positioning rods 131 are abutted to the outer wall of the inner protective cylinder 5, the positioning rods 131 are screwed to adjust the length of the positioning rods extending out of the outer protective cylinder and lock the position of the positioning rods 131, and further the position of the inner protective cylinder 5 relative to the outer protective cylinder 7 in the radial direction is adjusted, and the plurality of positioning rods 131 are matched in cooperation to ensure the coaxiality and the verticality of the inner protective cylinder 5 and the outer protective cylinder 7; in the hoisting process of the casing, because the jacking force of the positioning rods 131 on the inner casing 5 exists all the time, and the positioning rods 131 are uniformly distributed at intervals along the axial direction of the casing, the jacking force of the positioning rods 131 on the inner casing 5 is ensured, so that the inner casing 5 and the outer casing 7 are relatively fixed in the radial direction, and the coaxiality and the verticality of the inner casing 5 and the outer casing 7 are ensured not to change.
Referring to fig. 2 and 3, as an embodiment of the collimating pile structure provided by the present application, a handle 133 is disposed at an end of the positioning rod 131, which extends out of the outer sheath 7; the handle 133 includes a plurality of columns uniformly spaced along the circumference of the positioning rod 131, and the columns are perpendicular to the circumference of the positioning rod 131 and along the radial direction of the positioning rod 131.
In this embodiment, the handle is arranged to facilitate convenient holding by an operator when the positioning rod is screwed, the screwing is more convenient, labor-saving and rapid, the handle 133 is a cylinder vertically fixed to the axial direction of the positioning rod 131, when the positioning rod 131 is screwed, the cylinder is only required to be held to exert force along the circumferential direction of the positioning rod 131, the operation is time-saving and labor-saving, 2-6 cylinders are preferably arranged in number, and a plurality of held cylinders are arranged, so that the use is more convenient.
Referring to fig. 3, as an embodiment of an alignment post structure provided in the present application, each layer of positioning assembly 13 includes six positioning rods 131.
In this embodiment, six positioning rods are provided to ensure that the positioning rods have sufficient jacking force on the inner protection cylinder 5 and ensure the coaxiality between the inner protection cylinder 5 and the outer protection cylinder 7.
Referring to fig. 2, as an embodiment of an alignment post structure provided in the present application, a distance between adjacent positioning assemblies is 1000mm to 2000mm, preferably 1500 mm.
In this embodiment, when the inner casing 5 and the outer casing 7 are assembled, a set of positioning assemblies is installed every 1500mm along the axial direction of the outer casing 7, so that the coaxiality between the inner and outer casings 7 is continuously adjusted in the process of assembling the inner casing 5 and the outer casing 7, the inner casing 5 is abutted by the sets of positioning assemblies to apply force, and the coaxiality and the verticality of the inner casing 5 and the outer casing 7 in a pile hole are ensured.
Referring to fig. 4, as a specific embodiment of an alignment pile structure provided by the present application, the casting cover 4 includes a casting top plate 43, a casting top plate protection cover 41 disposed on an upper portion of the casting top plate 43, and a plurality of anchor bars 45 vertically fixed to a lower portion of the casting top plate 43; the casting top plate protective cover 41 is fixedly connected with the casting top plate 43 through a bolt 42; the outer surface of the upper part of the anchor bar 45 is provided with an external thread, and the anchor bar 45 and the pouring top plate 43 are fixed through a third nut 44.
The setting of pouring lid 4 in this embodiment can make things convenient for the hoist and mount of steel reinforcement cage 6 on the one hand, and on the other hand can conveniently be pour for steel reinforcement cage 6 is fixed more firmly through pouring cement with interior casing 5, and the above-mentioned anchor bar 45 of pouring lid 4 stretches into the inside of steel reinforcement cage 6, makes to pour and fixes more firmly reliably between lid 4 and the steel reinforcement cage 6.
Referring to fig. 5 and 6, as a specific embodiment of an alignment pile structure provided by the present application, a plurality of anchor bars 45 are respectively disposed on two concentric rings, the anchor bars 45 are disposed on the two rings in a staggered manner, a casting top plate 43 is circular, and the rings and the casting top plate 43 are concentric.
Above-mentioned anchor bar 45 staggered arrangement is on two concentric rings for pour the atress between apron and the steel reinforcement cage 6 more even, and connect more firmly, guarantee to pour the fixed between apron and the steel reinforcement cage 6.
Referring to fig. 1, as a specific embodiment of the collimating pile structure provided by the present application, a sealing ring 2 is disposed between a sealing cover 1 and an upper end of a retaining wall 17, the sealing ring 2 includes a circular bottom plate connected to a lower surface of the sealing cover 1 and a circular side plate connected to a side surface of the sealing cover 1, and the bottom plate is vertically connected to the side plate.
In this embodiment add sealing ring 2 between the upper end of sealed lid 1 and a dado section of thick bamboo 17, the sealed lid 1 of mainly used bearing avoids sealed lid 1 and a dado section of thick bamboo 17 top and outside soil layer direct contact, wearing and tearing dado section of thick bamboo 17 and sealed lid 1 to more importantly, through setting up sealing ring 2, can guarantee the levelness of sealed lid 1 installation, and it is more convenient to install the location.
The application also discloses a construction method of the collimation pile structure, which adopts any one of the above-mentioned collimation pile structure, and comprises the following steps:
step 6, hoisting the steel reinforcement cage 6: pumping out the slurry in the second pile hole 8, and dropping the reinforcement cage 6 into the pile hole through a crane to ensure that the height of the upper end of the reinforcement cage 6 is consistent with that of the upper end of the inner pile casing 5;
and 8, installing the wall protecting cylinder 17 and the sealing cover 1.
Specifically, before the step 1, hoisting preparation needs to be carried out, and firstly, construction machinery and personnel are organized to enter a field according to the construction date required by an owner; the connection work of approaching water and electricity is well done; carrying out field leveling, carrying out field leveling according to the elevation provided by the design file, and preparing for subsequent construction; arranging a double-protection-cylinder processing field; then, the construction stage of surveying and setting out and aligning the pile is carried out, on the basis of the three-way level of the site, according to the data of a building surveying control net and a plane arrangement diagram of the aligning pile, a grid control net and an elevation reference point of a pile position axis are measured, the center of the pile position is determined, the circumference of the upper part (namely a first section) is drawn by taking the midpoint as a circular point, the radius of a pile body and the thickness of a retaining wall as the radius, lime lines are scattered as the excavation dimension lines of the pile hole, and four pile central axis control points are led out of the pile hole along the center position of the pile.
In step 3, the protective cylinder is installed by adopting an integral hoisting and one-time hole entering method; the engineering collimation pile (bedrock pile) is positioned in the storage ring tunnel, a construction site is reserved for 35 multiplied by 25 meters, the requirement of a hoisting site can be met, and in the hoisting process of the double pile casings, no obstacle exists in the turning radius of the crane, and the crane can safely hoist. The construction site of the engineering collimation pile is not excavated and is original soil, and the soil is a sandy gravel layer. According to the geological survey report, the bearing capacity of the soil of the layer is 350 kPa. The calculated field can meet the requirements of large-scale equipment such as a rotary drilling rig, a 350t truck crane and the like on walking and construction safety. The crane can be directly supported in the range of 14 meters of the hole opening, and the double protection cylinders can be directly placed to the pile hole after being vertical. And pre-practicing is carried out according to the crane station position, the pile hole position and the double pile casing position in the hoisting plane layout drawing before the crane enters the field construction. If the hoisting requirement is not met, the site is leveled and the double protection cylinders are shifted. The double pile casings and the pile positions are ensured to be positioned in the hoisting radius of the crane, and the smooth hoisting of the double pile casings is ensured.
Specifically, the collimating pile adopts a 40-meter double-pile casing design, and a 350-ton truck crane is adopted to hoist the double pile casings; the length of the double protection cylinders is 40m, and 2-point hoisting is adopted; the first stage is as follows: the hoisting point is arranged 11 meters below the top, and the double pile casings are hoisted and are conveyed into the pile hole by 28 meters to be used in the hoisting process; and a second stage: and (4) carrying out lifting point replacement treatment, and lifting the lifting points to the position (the position 350mm below the top) of the reserved bracket in the existing assembling process until the double protection cylinders are placed at the preset position.
It is to be noted that the double pile casings must be slowly put down when being lifted into the hole, and quick throwing is forbidden to prevent the double pile casings from deforming or causing pile hole collapse; the 350-ton truck crane has to make the double protective sleeves in a vertical state in the process of lifting the double protective sleeve manhole.
The hoisting construction steps of the double protection cylinders (the inner protection cylinder 5 and the outer protection cylinder 7) are as follows:
(1) before hoisting, preparing various preparations in advance, and commanding the crane to transfer to a hoisting position;
(2) after the installation condition and the stress gravity center of a steel wire rope of the crane are checked, the crane starts to lift, and the tightness condition and the welding condition of a lifting lug of the steel wire rope are checked;
(3) in the hoisting process of a 350-ton truck crane, a hoisting point is positioned 11 meters below the top of the double protective cylinder, a main arm with the length of 50.5 meters is selected, the gyration radius is 22 meters, and the maximum hoisting capacity is 39.2 tons; considering that the bottom of the double sleeve slowly hooks the rotating arm without leaving the ground in the process of lifting the rotating arm, the actual lifting capacity only needs to consider half of the weight of the component, namely 24.59 tons, and then considers the safety factor of 10%, and the lifting capacity is considered according to 24.59 tons multiplied by 1.1=27.05 tons, thereby meeting the lifting requirement in the lifting process;
(4) after the double pile casings are vertical, pulling a traction rope on the pile casings for control, so that the double pile casings rotate to the pile hole position from the lifting position;
(5) commanding the crane to enter the hole and position, enabling the crane to rotate stably, and pulling a traction rope on the protective cylinder for control; when the protective sleeve is clamped in the hole during the lowering, the protective sleeve is lifted out to check the hole position condition and then lifted again, and the hole cannot be forced to be inserted; the double protection cylinders are under the action of buoyancy in the process of placing the double protection cylinders into the slurry, and the buoyancy is increased (0 to 34.1 tons) according to different placing depths, so that the lifting capacity of the truck crane in the process of placing is reduced, and the hoisting requirement is met;
(6) when the double protection cylinders are installed, instruments such as a theodolite are used for monitoring the verticality in real time; after the double protection cylinders are installed, the perpendicularity of the double protection cylinders is retested, and the perpendicularity is guaranteed by using a perpendicularity adjusting instrument to perform accurate fine adjustment;
(7) in the step 3, in the process of hoisting the inner protective cylinder 5 and the outer protective cylinder 7 into the pile hole and lowering, when each layer of positioning structure is close to the upper part of the pile hole, the lowering is suspended, the positioning structure (positioning rod) on the layer is removed, and the anti-corrosion treatment is carried out after the hole plugging is welded;
(8) when the double protection cylinders go down to the positions of the orifices, the outer protection cylinder 7 is supported at the orifices by I-shaped steel, the elevation of the top of the outer protection cylinder 7 is measured by a level gauge at the moment, the elevation of the outer protection cylinder 7 is adjusted in time, and the position and the height of the outer protection cylinder 7 are ensured to be accurate.
The construction method of the collimation pile structure can ensure the coaxiality and the verticality in the lowering process of the inner protection barrel 5 and the outer protection barrel 7, is stable in stress, can avoid deformation of the inner protection barrel 5 and the outer protection barrel 7, and is firm and reliable in connection and accurate in positioning.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A collimation stake structure which characterized in that: the steel bar reinforcement cage pouring device comprises an outer protective barrel (7), an inner protective barrel (5) arranged inside the outer protective barrel (7), a wall protecting barrel (17) arranged at the upper part of the outer protective barrel (7), a steel bar cage (6) arranged inside the inner protective barrel (5), a pouring cover body (4) positioned at the top of the steel bar cage (6) and a sealing cover (1) positioned at the upper port of the wall protecting barrel (17); the outer pile casing (7), the inner pile casing (5) and the reinforcement cage (6) are concentrically arranged in pile holes, the outer pile casing (7) is connected with the inner pile casing (5) through a fixing piece (14), the pile holes comprise first pile holes (3) located at the upper part and second pile holes (8) located at the lower part of the first pile holes (3) and concentrically arranged with the first pile holes (3), and the diameter of the first pile holes (3) is larger than that of the second pile holes (8); the outer pile casing (7) and the inner pile casing (5) are positioned in the first pile hole (3), and the reinforcement cage (6) penetrates through the first pile hole (3) and the second pile hole (8); the inner part of the inner casing (5) is used for pouring concrete.
2. A collimating pile structure as in claim 1, wherein: the inner protective cylinder (5) and the outer protective cylinder (7) are prefabricated parts, and when the inner protective cylinder and the outer protective cylinder are prefabricated parts, a positioning structure for positioning the outer protective cylinder (7) and the inner protective cylinder (5) is arranged between the outer protective cylinder (7) and the inner protective cylinder (5).
3. A collimating pile structure as in claim 2, wherein: the positioning structure comprises a plurality of layers of positioning components (13) which are arranged at intervals along the axial direction of the outer casing; the positioning assembly (13) comprises a plurality of positioning rods (131) vertically inserted into through holes formed in the wall of the outer protective barrel (7) and adjusting pieces (132) connected with the positioning rods (131) and used for adjusting the depth of the positioning rods (131) inserted into the through holes, the adjusting pieces (132) are in threaded connection with the positioning rods (131), the plurality of positioning rods (131) are uniformly distributed at intervals along the circumferential direction of the outer protective barrel (7), one end of each positioning rod (131) is in abutting connection with the outer wall of the inner protective barrel (5), and the other end of each positioning rod (131) extends out of the outer wall of the outer protective barrel (7).
4. A collimating pile structure as in claim 3, wherein: each layer of the positioning assembly (13) comprises six positioning rods (131).
5. A collimating pile structure as in claim 3, wherein: the distance between the adjacent positioning components (13) is 1000mm-2000 mm.
6. A collimating pile structure as in claim 1, wherein: the pouring cover body (4) comprises a pouring top plate (43), a pouring top plate protective cover (41) arranged on the upper portion of the pouring top plate (43) and a plurality of anchor bars (45) vertically fixed on the lower portion of the pouring top plate (43); the outer surface of the upper portion of each anchor bar (45) is provided with an external thread, and the anchor bars (45) and the pouring top plate (43) are fixed through third nuts (44).
7. A collimating pile structure as in claim 6, wherein: the anchor bars (45) are respectively arranged on two concentric rings, and the anchor bars (45) are arranged on the two rings in a staggered manner.
8. A collimating pile structure as in claim 1, wherein: sealing cover (1) with be equipped with sealing ring (2) between the upper end of a wall-protecting section of thick bamboo, sealing ring (2) including with the annular bottom plate of the ring shape of sealing cover (1) lower surface connection and with the annular curb plate of the ring shape of sealing cover (1) side surface connection, the bottom plate with the curb plate is connected perpendicularly.
9. A construction method of a collimating pile structure is characterized by comprising the following steps: use of a collimating pile structure according to any of claims 1 to 8, comprising the steps of:
step 1, drilling a first pile hole (3): drilling a first pile hole (3) by a drilling machine;
step 2, prefabricating a protective cylinder: the inner protective cylinder (5) and the outer protective cylinder (7) are transported to the site in sections, the inner protective cylinder (5) and the outer protective cylinder (7) are assembled and assembled on the site, a positioning structure and a fixing piece (14) are arranged between the inner protective cylinder (5) and the outer protective cylinder (7), and the assembling precision of the inner protective cylinder (5) and the outer protective cylinder (7) is not more than 1/400 in the assembling process; when the outer protective barrel (7) is processed, a hoisting bracket (15) is installed at the top, and a lifting lug (16) is installed on the side wall;
step 3, mounting a protective cylinder: connecting a hoisting support (15) with a lifting lug (16) by using a crane, lowering the inner protecting cylinder (5) and the outer protecting cylinder (7) to the first pile hole (3), and adjusting the verticality of the inner protecting cylinder (5) and the outer protecting cylinder (7);
and 4, drilling a second pile hole (8): drilling a second pile hole (8) by a drilling machine;
step 5, prefabricating a reinforcement cage: manufacturing a reinforcement cage (6), and fixing a pouring cover plate (4) on the top of the reinforcement cage (6);
and 6, hoisting a reinforcement cage (6): pumping out the slurry in the second pile hole (8), and dropping the reinforcement cage (6) into the pile hole through a crane, so that the height of the upper end of the reinforcement cage (6) is consistent with that of the upper end of the inner pile casing (5);
step 7, pouring concrete: concrete is poured into the inner protective barrel (5) to enable the reinforcement cage (6) and the inner protective barrel (5) to form an integral structure;
and 8, mounting a wall protecting cylinder (17) and a sealing cover (1).
10. The construction method of a collimating pile structure according to claim 9, wherein: and 3, in the process of hoisting the inner pile casing (5) and the outer pile casing (7) into the pile hole, when each layer of positioning structure is close to the upper part of the pile hole, removing the positioning structure of the layer, and performing anticorrosive treatment after welding and hole plugging.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010820661.4A CN111962506A (en) | 2020-08-14 | 2020-08-14 | Collimating pile structure and construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114622549A (en) * | 2022-01-18 | 2022-06-14 | 吉林大学 | Bored concrete pile hole-forming construction method for complex stratum |
| CN114622548A (en) * | 2022-01-18 | 2022-06-14 | 吉林大学 | Bored concrete pile pore-forming construction structure for complex stratum |
-
2020
- 2020-08-14 CN CN202010820661.4A patent/CN111962506A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114622549A (en) * | 2022-01-18 | 2022-06-14 | 吉林大学 | Bored concrete pile hole-forming construction method for complex stratum |
| CN114622548A (en) * | 2022-01-18 | 2022-06-14 | 吉林大学 | Bored concrete pile pore-forming construction structure for complex stratum |
| CN114622549B (en) * | 2022-01-18 | 2022-11-29 | 吉林大学 | Bored concrete pile hole-forming construction method for complex stratum |
| CN114622548B (en) * | 2022-01-18 | 2022-11-29 | 吉林大学 | Bored concrete pile pore-forming construction structure for complex stratum |
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