CN113863303B - Longitudinal separation type steel casing sinking and pulling construction method - Google Patents
Longitudinal separation type steel casing sinking and pulling construction method Download PDFInfo
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- CN113863303B CN113863303B CN202111308081.8A CN202111308081A CN113863303B CN 113863303 B CN113863303 B CN 113863303B CN 202111308081 A CN202111308081 A CN 202111308081A CN 113863303 B CN113863303 B CN 113863303B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/26—Placing by using several means simultaneously
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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
- E02D5/68—Mould-pipes or other moulds for making bulkheads or elements thereof
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
- E02D9/02—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by withdrawing
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Abstract
The invention relates to the technical field of building equipment, and discloses a longitudinal separation type steel casing sinking and pulling construction method. According to the invention, after the fishing spear penetrates through the fishing hole on the connecting piece, the connecting piece is pulled out from the flange strip by using the hoisting machine, so that the matched flange strips are separated, the separation of the left half barrel and the right half barrel is realized, the separated left half barrel and the separated right half barrel are respectively pulled out upwards from soil, the resistance and the influence on a concrete pile body during the recovery of the barrel can be greatly reduced, the connecting piece does not need to be cut off when the left half barrel and the right half barrel are separated, the connecting piece only needs to be hoisted upwards by using the fishing spear, the operation difficulty is lower, the speed is higher, the connecting piece is kept complete and can be reused, and the resources are saved.
Description
Technical Field
The invention relates to the technical field of building equipment, in particular to a longitudinal separation type steel casing sinking and pulling construction method.
Background
The steel casing retaining wall is more and more widely applied to the construction of the cast-in-place pile, and especially becomes a most effective auxiliary tool for ensuring the pore-forming and pile body integrity of the cast-in-place pile in the construction of engineering pile foundations with severe construction conditions and large geological changes such as rivers, docks, water gates and the like.
According to the traditional construction process, the underwater or underground steel casing which is deeply buried cannot be dismantled or the dismantling cost is high due to the limitation of construction conditions, and the underwater or underground steel casing can only be used as a permanent or disposable steel casing, so that the utilization rate of the steel casing is low, and the construction cost is greatly increased.
If the application number is CN201520139880.0, the publication number is CN204690743U, the name is the Chinese utility model patent of "a steel protects a section of thick bamboo", disclose "a steel protects a section of thick bamboo, the novel nipple rectifier comprises a cylindrical shel, the barrel includes left half pipe and right half pipe, the cross section of left half pipe and right half pipe can make up and form a complete circle, all be equipped with vertical flange on the terminal surface of left half pipe and right half pipe, be connected through the connecting piece between the vertical flange that sets up on left half pipe and the vertical flange on right half pipe, form the clearance between the vertical flange on left half pipe and the vertical flange on right half pipe, be equipped with the separator who is used for separating the connecting piece in the clearance," separator includes parting knife and connecting rope, the connecting rope is connected with the parting knife, the parting knife head is equipped with the separation and colludes, on the connecting piece of two vertical flange wherein one end, this utility model connects the rope through the pulling, can make the parting knife remove in the clearance to can cut off the connecting piece, make left half pipe and right half pipe separate half pipe, with the half pipe, can reduce the concrete pile body and pull the construction time and half pipe, thereby can reduce the construction resistance to left half pipe and the concrete recovery barrel.
Although above-mentioned patent can be through the mode with the barrel split into two halves, reduce the resistance when retrieving the barrel by a wide margin and to the influence of concrete pile body, thereby realize improving the utilization number of times that the steel protects a section of thick bamboo, reduce construction cost's purpose, because above-mentioned patent is the left half pipe and the right half pipe separation that the mode of cutting off the connecting piece through using the separation sword realizes, thereby the separation sword is when upwards pulling each connecting piece of cutting off, every through a connecting piece all can receive very big resistance, make the degree of difficulty that realizes that the steel protects a section of thick bamboo to separate great, speed is slower, and the connecting piece that is cut off receives the damage, and easily stay in the soil, lead to can not realizing reuse, cause the waste.
Disclosure of Invention
The invention aims to provide a longitudinal separation type steel casing sinking and pulling construction method to solve the defects in the prior art.
In order to achieve the above purpose, the invention provides the following technical scheme: a longitudinal separation type steel pile casing sinking and pulling construction method comprises the following steps:
(1) Assembling a steel casing, wherein the steel casing comprises a left half cylinder and a right half cylinder, the left half cylinder and the right half cylinder are connected through two groups of flange strips, each group of flange strips is provided with a longitudinal operation cavity, a connecting piece is connected in the longitudinal operation cavity in a sliding manner, and the transverse extrusion force between the connecting piece and the longitudinal operation cavity is changed by adjusting the connecting piece until the left half cylinder and the right half cylinder are tightly connected;
(2) Sinking the steel protecting cylinder, vertically vibrating the steel protecting cylinder by a hoisting vibration hammer and pressing the steel protecting cylinder into the soil, exposing the steel protecting cylinder and the connecting piece to the original ground for 40-60cm, and backfilling and tamping the periphery of the steel protecting cylinder layer by using clay;
(3) The steel protects a section of thick bamboo and extracts, is provided with the salvage hole on the connecting piece, inserts fishing spear in the salvage hole, and fishing spear's top is connected with the salvage rope, and fishing rope's the other end is connected with the hoisting machine, and fishing spear inserts and passes after the salvage hole, and the card is in fishing hole's below, upwards extracts with the separating flange strip in vertical operation chamber with the connecting piece through the hoisting machine, and half a section of thick bamboo on the left side and half a section of thick bamboo on the right side after the separation are taken out respectively again.
According to the construction method for sinking and pulling out the longitudinal separation type steel casing, the operation space is formed between each group of the flange strips, the longitudinal grooves with T-shaped longitudinal sections are oppositely arranged on the opposite surfaces of each group of the flange strips, and the longitudinal operation cavity is formed between the two longitudinal grooves and the operation space.
According to the construction method for sinking and pulling out the longitudinal separated steel casing, the connecting piece comprises two opposite clamping strips, clamping grooves with T-shaped longitudinal sections are oppositely arranged on opposite surfaces of the two clamping strips, the clamping grooves penetrate through the bottoms of the clamping strips, a tightening mechanism is connected between the two clamping grooves in a sliding and clamping mode, the clamping strips are connected in the longitudinal grooves in a sliding and clamping mode, and the transverse extrusion force between the clamping strips and the longitudinal grooves is changed by adjusting the tightening mechanism.
The longitudinal separation type steel pile casing sinking and pulling construction method is characterized in that the tightening mechanism comprises two extrusion plates which are arranged oppositely, the two extrusion plates are in one-to-one correspondence in two clamping grooves in a sliding clamping mode, transverse connecting rods are oppositely arranged on opposite faces of the two extrusion plates, the two transverse connecting rods are connected through a sleeve, the sleeve is in threaded connection with one of the transverse connecting rods and is in rotating clamping connection with the other transverse connecting rod, and transverse extrusion force between the extrusion plates and the clamping grooves can be changed by rotating the sleeve.
According to the longitudinal separation type steel casing sinking and pulling construction method, the number of the tightening mechanisms is multiple, and the tightening mechanisms are connected with each other through the connecting ropes.
According to the longitudinal separated steel casing sinking and pulling construction method, the inner side surfaces, close to each other, of the two oppositely arranged clamping grooves are symmetrically provided with the protruding blocks which are in one-to-one correspondence with the extrusion plates on the plurality of tightening mechanisms, the clamping grooves are divided into the loosening space and the fastening space which are staggered up and down by the plurality of protruding blocks, the transverse width of the clamping strip is smaller than the transverse width of the longitudinal groove, when the left half cylinder and the right half cylinder are tightly connected, each extrusion plate is located in the corresponding fastening space, and when the top of the extrusion plate on the uppermost tightening mechanism is abutted to the top of the clamping groove, each extrusion plate is located in the corresponding loosening space.
According to the construction method for sinking and pulling out the longitudinal separated steel casing, the fishing holes are formed in the two transverse connecting rods on the uppermost tightening mechanism.
According to the construction method for sinking and pulling out the longitudinal separation type steel casing, the fishing spear comprises the longitudinal rod, two spearheads which are hinged to each other are symmetrically arranged at the bottom end of the longitudinal rod through the transverse shaft, a spring is arranged between the two spearheads, and the spring penetrates through the longitudinal rod and is located above the transverse shaft.
In the longitudinal separated steel casing sinking and pulling construction method, the tops of the two spearheads are downwards sunken into an arc shape.
According to the longitudinal separation type steel casing sinking and pulling construction method, the bottom of the flange strip is provided with the spine part.
In the technical scheme, the longitudinally-separated steel casing sinking and pulling construction method provided by the invention has the advantages that the left half cylinder and the right half cylinder are tightly connected into the complete steel casing by matching the connecting piece with the flange strips, the connecting piece is pulled out from the flange strips by using a hoisting machine after the fishing spears penetrate through fishing holes in the connecting piece, so that the matched flange strips are separated, and the left half cylinder and the right half cylinder are separated finally.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings required in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.
FIG. 1 is a schematic structural diagram of a steel casing in an integral arrangement according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a first section of steel casing according to an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of part A according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a middle steel casing according to an embodiment of the present invention;
FIG. 5 is an enlarged view of the part B according to the embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a tail section steel casing provided in an embodiment of the present invention;
FIG. 7 is an enlarged view of the portion C according to the embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a connector according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of an enlarged structure of a portion D according to an embodiment of the present invention;
FIG. 10 is an enlarged view of section E according to an embodiment of the present invention;
FIG. 11 is a cross-sectional view of a connector according to an embodiment of the present invention;
FIG. 12 is an enlarged view of the portion F according to the embodiment of the present invention;
FIG. 13 is an enlarged view of the section G according to the embodiment of the present invention;
FIG. 14 is a cross-sectional view of a flange strip coupled to a connector according to an embodiment of the present invention;
FIG. 15 is an enlarged schematic view of the H-section according to the embodiment of the present invention;
FIG. 16 is an enlarged view of the portion I according to the embodiment of the present invention;
fig. 17 is a schematic structural diagram of a tightening mechanism according to an embodiment of the present invention;
FIG. 18 is a cross-sectional view of a tightening mechanism provided in accordance with an embodiment of the present invention;
fig. 19 is a schematic structural diagram of a fishing spear provided in the embodiment of the present invention;
fig. 20 is a partial structural schematic view of the connection of the connecting members according to the embodiment of the present invention.
Description of reference numerals:
1. a first section of steel casing; 2. a middle section steel casing; 3. a tail section steel casing; 4. fishing out the spear; 401. a spearhead; 402. a horizontal axis; 403. a spring; 404. a longitudinal bar; 5. drilling; 6. a transverse flange; 7. a flange strip; 701. a longitudinal slot; 8. a clamping bar; 801. a card slot; 8011. loosening the space; 8012. a fastening space; 802. a raised block; 9. a pressing plate; 10. a sleeve; 11. a transverse connecting rod; 1101. a flange; 12. fishing holes; 13. hoisting the lug; 14. a spike portion; 15. and connecting ropes.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
The steel casing can be arranged in sections or in whole sections, and when the required length of the steel casing is longer, the steel casing can be arranged in sections and is convenient to transport. The structure of the steel protective cylinder which is arranged in sections and assembled together is approximately the same as that of the steel protective cylinder which is arranged in whole sections, the steel protective cylinder which is arranged in sections is equivalent to directly cutting off the whole steel protective cylinder, and the difference is only that the transverse flange 6 for connecting the steel protective cylinders and the connecting mechanism for connecting the connecting pieces are added to the steel protective cylinder which is arranged in sections, so that the common structures can be mutually referred except the difference between the steel protective cylinder and the steel protective cylinder.
The first embodiment:
as shown in fig. 1 to 20, a longitudinal separation type steel casing sinking and pulling construction method provided by an embodiment of the present invention includes the following steps:
(1) Assembling a steel casing, wherein the steel casing comprises a left half cylinder and a right half cylinder, the left half cylinder and the right half cylinder are connected through two groups of flange strips 7, each group of flange strips 7 is provided with a longitudinal operation cavity, a connecting piece is connected in the longitudinal operation cavity in a sliding manner, and the transverse extrusion force between the connecting piece and the longitudinal operation cavity is changed by adjusting the connecting piece until the left half cylinder and the right half cylinder are tightly connected;
(2) Sinking the steel protecting cylinder, vertically vibrating the steel protecting cylinder by a hoisting vibration hammer and pressing the steel protecting cylinder into the soil, exposing the steel protecting cylinder and the connecting piece to the original ground for 40-50cm, and backfilling and tamping the periphery of the steel protecting cylinder layer by using clay;
(3) A steel protects a section of thick bamboo and extracts, is provided with salvage hole 12 on the connecting piece, inserts fishing spear 4 in fishing hole 12, and fishing spear 4's top is connected with the fishing rope, and fishing rope's the other end is connected with the hoisting machine, and fishing spear 4 inserts and passes after fishing hole 12, and the card is in fishing hole 12's below, upwards extracts in order to separate flange strip 7 in following the vertical operation chamber with the connecting piece through the hoisting machine, and the left half section of thick bamboo and the right half section of thick bamboo after the separation are taken out respectively again.
Specifically, the longitudinal separation type steel casing sinking and pulling construction method provided by the embodiment is suitable for silt (flow plasticity) geology of a shoal or a reclamation area, and a steel casing is required to be used for foundation treatment of hole-drilling bored concrete pile hole-forming due to shrinkage cavity collapse; steel casing is needed for the pore-forming of the cast-in-situ bored pile in the foundation treatment of the river embankment project when meeting a sand bed or other geological structures which are easy to collapse; and the cast-in-situ bored pile is positioned under water or in a special stratum part and needs a steel casing. In this embodiment, the number of each group of flange strips 7 is two, and two flange strips 7 share one connecting member. The steel protects a section of thick bamboo and adopts 8mm thick A3 steel sheet system of rolling up to form, and fishing rope is preferred wire rope, and a section of thick bamboo is protected to the steel includes 2 semicircles, and 2 semicircles are left half section of thick bamboo and right half section of thick bamboo promptly, calculates according to design stake footpath and relevant regulation and tapping protects a section of thick bamboo diameter, and a general steel protects a section of thick bamboo internal diameter and should be greater than design stake footpath 100 ~ 200mm, and length is according to actual geological conditions preparation, and the whole construction flow of drilling bored concrete pile includes: construction preparation, site leveling → measurement and paying-off, drilling positioning → pile protection construction → assembly and steel pile casing sinking → drill positioning → drilling start → process inspection → final hole → hole forming inspection → primary hole cleaning → steel bar manufacturing and putting-down → pipe laying (water closing and tensile test) → secondary hole cleaning → concrete pouring → steel pile casing pulling-out → pile machine shifting → pile head breaking.
Assembling a steel casing: before the steel casing is sunk, the steel casing needs to be installed in a combined mode and then pressed into the soil.
Firstly, splicing and aligning a left half cylinder and a right half cylinder, transversely hoisting one of the left half cylinder and the right half cylinder by using a hoisting machine during alignment, stably placing the other one on the ground, after alignment, enabling two flange strips 7 in each group of flange strips 7 to be opposite and upright, forming an operation interval between each group of flange strips 7, enabling opposite surfaces of each group of flange strips 7 to be oppositely provided with a longitudinal groove 701 with a T-shaped longitudinal section, enabling the longitudinal groove 701 to penetrate through the top and the bottom of the flange strips 7, jointly forming a longitudinal operation cavity between the two longitudinal grooves 701 and the operation interval, then inserting a connecting piece into the longitudinal operation cavity from the top of the longitudinal operation cavity, changing the transverse extrusion force between the connecting piece and the longitudinal operation cavity by adjusting the connecting piece, and before the connecting piece is inserted into the longitudinal operation cavity, in order to facilitate insertion, adjusting the transverse extrusion force between the connecting piece and the longitudinal operation cavity to the minimum, therefore, almost friction between the connecting piece and the longitudinal operation cavity is zero, the connecting piece can smoothly slide into the bottom end from the top end of the longitudinal operation cavity, then the connecting piece is adjusted to adjust the transverse extrusion force between the connecting piece and the longitudinal operation cavity to be maximum or close to maximum, the splicing part of the left half cylinder and the right half cylinder is tightly compacted to prevent gaps, after the connecting piece on one side is installed, the connecting piece on the other side is installed according to the same method, when the transverse extrusion force between the connecting piece and the longitudinal operation cavity is maximum or close to maximum, the friction between the connecting piece and the longitudinal operation cavity is large, the connecting piece cannot move in the longitudinal operation cavity under the condition that a hoisting machine does not hoist, the left half cylinder and the right half cylinder are always in a tightly connected state, and the assembly of the steel protection cylinder is completed at the moment.
The installation of the connecting piece in this embodiment is very quick, compares with prior art, need not give 7 trompils of flange strip to use the steel wire to connect, only need with whole connecting piece insert vertical operation chamber after, the adjustment elasticity can, convenient and fast more.
In this embodiment, the connecting member includes two clamping strips 8 that set up relatively, the opposite face of two clamping strips 8 is provided with the draw-in groove 801 that the longitudinal section is "T" shape relatively, draw-in groove 801 runs through the bottom of clamping strip 8, the slip joint has tightening mechanism between two draw-in grooves 801, clamping strip 8 slip joint is in longitudinal groove 701, under tightening mechanism's effect, the lateral surface of clamping strip 8 can be laminated with the inner wall in longitudinal groove 701 mutually, through adjusting tightening mechanism in order to change the horizontal extrusion force between clamping strip 8 and the longitudinal groove 701. Before the connecting piece is inserted into the longitudinal operation cavity, the connecting piece needs to be assembled, during assembly, the tightening mechanism slides into the clamping groove 801 from the bottom of the clamping strip 8, then the clamping strip 8 is inserted into the longitudinal operation cavity again, then the distance between the two oppositely arranged clamping strips 8 can be changed by adjusting the tightening mechanism, so that the transverse extrusion force between the tightening mechanism and the clamping groove 801 is changed, the transverse extrusion force between the clamping strip 8 and the longitudinal groove 701 is changed, and when the distance between the two oppositely arranged clamping strips 8 is the minimum, the transverse extrusion force between the clamping strip 8 and the longitudinal groove 701 is the maximum, so that the assembly of the left half cylinder and the right half cylinder is realized.
As shown in fig. 17 and 18, the tightening mechanism includes two extrusion plates 9 arranged oppositely, the two extrusion plates 9 are slidably clamped in the two clamping grooves 801 in a one-to-one correspondence manner, under the action of the tightening mechanism, the outer side surfaces of the extrusion plates 9 can be attached to the inner walls of the clamping grooves 801, the opposite surfaces of the two extrusion plates 9 are oppositely provided with transverse connecting rods 11, the transverse connecting rods 11 are welded or integrally connected with the extrusion plates 9, the two transverse connecting rods 11 are connected through sleeves 10, the diameters of the two transverse connecting rods 11 are different, but when the tightening mechanism is used, the central axes of the two transverse connecting rods 11 are collinear, the sleeves 10 are in threaded connection with one transverse connecting rod 11 and are rotatably clamped with the other transverse connecting rod 11, the end portions of the transverse connecting rods 11 rotatably connected with the sleeves 10 are provided with flanges 1101, the end portions of the sleeves 10 connected with the transverse connecting rods 11 are integrally provided with baffle plates, the inner diameters of the baffle plates are smaller than the outer diameters of the flanges 1101, so that the flanges 1101 are rotatably clamped in the inner cavities of the sleeves 10, the transverse connecting rods 11 are limited, the transverse connecting rods 9 and the operating space between the sleeves 10 can be provided for operating space between the extrusion strips 7. In this embodiment, the sleeve 10 is screwed to one of the transverse links 11 and rotationally clamped to the other transverse link 11, so that when the sleeve 10 is rotated in a forward or reverse direction, the sleeve 10 can move the two transverse links 11 closer to or away from each other, so that the distance between the two oppositely arranged squeezing plates 9 on the tightening mechanism is changed, and when the two squeezing plates 9 are moved closer to each other, the two squeezing plates 9 can respectively pull the two oppositely arranged clamping strips 8 to move closer to each other, thereby finally realizing the assembly of the left half cylinder and the right half cylinder.
Further, in order to ensure that the left half cylinder and the right half cylinder can be tightly connected, a plurality of tightening mechanisms are arranged and are connected with each other through a connecting rope 15. A plurality of tightening mechanism arrange from top to bottom, but the equidistance is arranged to through connecting rope 15 with a plurality of tightening mechanism interconnect, connect rope 15 and tightening mechanism welding or through bolt fixed connection, connect 15 preferred wire rope of rope, wire rope is difficult for taking place vertical deformation, thereby the distance between each tightening mechanism is difficult for changing, and wire rope can take place the bending simultaneously, thereby can change a plurality of tightening mechanism's length, conveniently carries, transports and places. Another advantage of utilizing simultaneously to connect rope 15 to connect a plurality of tightening mechanism is that when upwards pulling the tightening mechanism of the top, can be under the connection effect of connecting rope 15, pull up other tightening mechanism together, can make things convenient for the operation that the later stage was taken out the connecting piece from vertically operating the chamber.
Sinking the steel casing: after the assembly is finished, the assembled steel pile casing is vertically lifted by using a lifting vibration hammer, the center of the steel pile casing is aligned with the center of a pile position, the deviation between the center of the steel pile casing and the center line of the pile position is not more than 20mm, then the steel pile casing is directly vibrated vertically by using the lifting vibration hammer to be pressed into the soil, finally the steel pile casing and a connecting piece are exposed out of the original ground by 40-60cm, the later-stage extraction is convenient, and finally, the periphery of the pile casing is backfilled and tamped by using clay in a layered mode.
In this embodiment, the top height that a steel protected a section of thick bamboo is not less than to flange strip 7, and the bottom height that a steel protected a section of thick bamboo is not highly higher than to flange strip 7 is highly not higher than the bottom height that a steel protected a section of thick bamboo, when guaranteeing that a steel protected a section of thick bamboo exposes the place, flange strip 7 also exposes former ground, and the length of connecting piece changes along with the length of flange strip 7, and flange strip 7 of sufficient length makes the length of connecting piece also longer for a steel protected a section of thick bamboo to can make the better by connecting piece zonulae occludens of a left half section of thick bamboo and a right half section of thick bamboo.
Furthermore, the bottom of the flange strip 7 is provided with a spine part 14, the spine part 14 and the bottom of the flange strip 7 can be welded or integrally connected, the contact area between the bottom of each group of flange strips 7 and the ground can be greatly reduced by utilizing the spine part 14, and therefore the flange strips 7 can be pressed into the ground more smoothly; simultaneously, when the left half section of thick bamboo and the right half section of thick bamboo zonulae occludens, the opposite face of two spine portions 14 is laminated each other for spine portion 14 is sealed with the bottom in vertical operation chamber, makes the steel protect a section of thick bamboo in the in-process that sinks, and the bottom of connecting piece can not direct and soil contact, thereby can protect the stability of connecting piece in vertical operation chamber, makes it difficult by soil upwards promotion, and then ensures the firm in connection nature of the left half section of thick bamboo and the right half section of thick bamboo.
Pulling out the steel casing: and (5) pouring concrete into the drill hole, and after the concrete is solidified, disassembling and pulling out the steel casing. Firstly, the connecting piece is required to be taken out of a longitudinal operation cavity, so that a left half barrel and a right half barrel are separated, specifically, a fishing spear 4 is inserted into a corresponding fishing hole 12, the fishing spear 4 can be clamped below the fishing hole 12 after penetrating through the fishing hole 12, the fishing hole 12 is positioned at the upper part of the connecting piece and positioned above the original ground, so that the fishing spear 4 can be conveniently inserted, a fishing rope is fixedly connected to the top end of the fishing spear 4, the other end of the fishing rope is connected with a hoisting machine, then the connecting piece is pulled upwards by operating the hoisting machine, the upward pulling force is greater than the friction force between the connecting piece and the longitudinal operation cavity, so that the connecting piece can be pulled out of the longitudinal operation cavity, after the connecting piece is taken out, two groups of flange strips 7 are automatically separated without being bound, and the left half barrel and the right half barrel are separated;
and then respectively taking out the left half cylinder and the right half cylinder, wherein the top parts of the outer surfaces of the left half cylinder and the right half cylinder are respectively welded with two hoisting lugs 13, two steel wire ropes are firstly used for being respectively connected to the two hoisting lugs 13 of the left half cylinder, the other ends of the two steel wire ropes are connected with the other steel wire rope, the other steel wire rope is connected with a hoisting machine, the left half cylinder can be pulled out of the soil by controlling the hoisting machine, and then the right half cylinder is pulled out by the same method.
In this embodiment, through the cooperation that uses connecting piece and flange strip 7, make left half section of thick bamboo and right half section of thick bamboo zonulae occludens become a complete steel casing, through with fishing spear 4 run through behind the salvage hole 12 on the connecting piece, and use hoisting machine to take out the connecting piece from the flange strip, thereby make the separation of matched with flange strip 7, the separation of left half section of thick bamboo and right half section of thick bamboo is finally realized, the left half section of thick bamboo and right half section of thick bamboo after the separation are upwards pulled out from the soil respectively, can reduce the resistance when retrieving the steel casing by a wide margin and the influence to the concrete pile body, compared with the prior art, when splitting left half section of thick bamboo and right half section of thick bamboo, need not cut off the connecting piece, only need use fishing spear 4 upwards hoist the connecting piece can, the operation degree of difficulty is littleer, and the speed is faster, and the connecting piece keeps complete reuse, save resources.
In this embodiment, fishing hole 12 sets up on two cross links 11 that are located the tightening mechanism of the top, fishing spear 4 and fishing hole 12 one-to-one, and the quantity of fishing hole 12 is two, and when taking out the connecting piece, the focus of connecting piece falls between two fishing holes 12, can make when upwards pulling the connecting piece, makes the nearly possible vertical state of keeping of connecting piece difficult for appearing crooked or difficult great crooked appearing to can reduce the degree of difficulty of taking out the connecting piece.
In this embodiment, the sum of the frictional force between each stripper plate 9 and the draw-in groove 801 is less than the frictional force between the clamping strip 8 and the longitudinal groove 701, when the fishing spear 4 upwards pulls the connecting piece, each tightening mechanism that can firstly make interconnect moves upwards simultaneously until the tops of two stripper plates 9 on the tightening mechanism that is located the top abut against the top of the longitudinal groove 701, and then the tightening mechanism drives the clamping strip 8 to move upwards together, thereby finally realizing taking out of the whole connecting piece.
In order to further reduce the difficulty of taking out the connecting piece, in this embodiment, the inner side surfaces of the two opposite clamping grooves 801 that are close to each other are symmetrically provided with protruding blocks 802 that are in one-to-one correspondence with the pressing plates 9 on the multiple tightening mechanisms, the clamping grooves 801 are divided into a loosening space 8011 and a fastening space 8012 that are staggered up and down by the multiple protruding blocks 802, the transverse width of the clamping strip 8 is smaller than the transverse width of the longitudinal groove 701, when the left half barrel and the right half barrel are tightly connected, each pressing plate 9 is located in the corresponding fastening space 8012, and when the top of the pressing plate 9 on the tightening mechanism that is located at the top is abutted to the top of the clamping groove 801, each pressing plate 9 is located in the corresponding loosening space 8011. In this embodiment, when the left half barrel and the right half barrel are tightly connected, each squeezing plate 9 is located in the corresponding fastening space 8012, and when the connecting member is taken out, the tightening mechanism moves upward first, so each squeezing plate 9 moves upward from the corresponding fastening space 8012 to the corresponding loosening space 8011, until the top of the squeezing plate 9 on the uppermost tightening mechanism abuts against the top of the clamping groove 801, obviously, after each squeezing plate 9 enters the loosening space 8011, the outer side surface of the squeezing plate 9 is not squeezed with the inner wall of the clamping groove 801 due to the sudden increase of the transverse distance, so each tightening mechanism loses all squeezing of the two clamping strips 8, the squeezing force becomes zero, each tightening mechanism becomes loose, meanwhile, since the transverse width of the clamping strip 8 is smaller than the transverse width of the longitudinal groove 701, the clamping strip 8 with the squeezing force at this time also becomes loose in the longitudinal groove 701, the squeezing force of the clamping strip 8 to the longitudinal groove also disappears, thereby finally reducing the friction force between the connecting member and the flange strip 7 to zero, there is no limitation to the vertical friction force, and the difficulty in taking out of the connecting member from the longitudinal groove can be greatly reduced.
In this embodiment, when the left half cylinder and the right half cylinder are assembled, the bottom of the tightening mechanism (i.e., the bottom of the pressing plate 9) can abut against the top of the spine 14, and at this time, each pressing plate 9 is located in the corresponding fastening space 8012.
In this embodiment, the fishing spear 4 includes a longitudinal rod 404, two hinged spearheads 401 are symmetrically arranged at the bottom end of the longitudinal rod 404 through a transverse shaft 402, a spring 403 is arranged between the two spearheads 401, two ends of the spring 403 are respectively fixedly welded to inner side surfaces of the two spearheads 401, the spring 403 passes through the longitudinal rod 404 and is located above the transverse shaft 402, and a through hole for the spring 403 to pass through is arranged on the longitudinal rod 404. The longitudinal rod 404 of the fishing spear 4 is connected with the fishing rope, the two hinged spearheads 401 have outward thrust by the elasticity of the spring 403, the principle of the fishing spear is the same as that of a clamp, the diameters of the circumscribed circles of the two hinged spearheads 401 are sequentially reduced from top to bottom, the diameter of the fishing hole 12 is larger than the length of the transverse shaft 402 and smaller than the diameter of the circumscribed circle of the top ends of the two spearheads 401, when the tops of the two spearheads 401 are pressed inwards, the spring 403 contracts, so that the two spearheads 401 can smoothly pass through the fishing hole 12, after passing, the two spearheads 401 restore to the original state under the elasticity of the spring 403, at the moment, the tops of the two spearheads 401 are abutted against the bottom of the transverse connecting rod 11, and the tops of the two spearheads 401 cannot pass through the fishing hole 12, so that the fishing spear 4 is clamped below the fishing hole 12. When the fishing spear 4 needs to be taken out of the fishing hole 12, the tops of the two spearheads 401 are pressed inward again.
Further, the top portions of the two spearheads 401 are depressed downward in an arc shape. In this embodiment, the cross link 11 is a cylinder, the bottom of the outer surface of the cross link is arc-shaped, the top of the spearhead 401 is designed to be arc-shaped and recessed downwards, so that the contact area between the spearhead 401 and the cross link 11 can be increased, the stability of the fishing spear 4 is increased, and the shaking is reduced.
Second embodiment:
as shown in fig. 1 to 20, the second embodiment is a segmented arrangement of the steel casing, and is different from the first embodiment in that:
(1) The steel casing is divided into a first section of steel casing 1, a middle section of steel casing 2 and a tail section of steel casing 3 from top to bottom, the sections of steel casing are connected through transverse flanges 6, the transverse flanges 6 on the sections of steel casing comprise a left half flange and a right half flange, the left half flange and the right half flange of the transverse flanges 6 respectively correspond to the left half cylinder and the right half cylinder of the steel casing one by one, the left half flange and the right half flange are separated by flange strips 7, the transverse flanges 6 on the sections of steel casing are connected with bolts through drill holes 5 in a matching mode, the number of the drill holes 5 can be set according to actual conditions, as long as the sections of steel casing can be tightly and firmly connected to prevent leakage, the length of each section of steel casing is 3-4 m, the number of the middle section of steel casing 2 can be one or more, the connection method among the transverse flanges 6 is determined according to the length condition of the actually required steel casing, and the connection method is the prior art and is not repeated.
(2) The connecting piece is from the top down the subsection set to first section connecting piece, well festival connecting piece, the tail section connecting piece, first section connecting piece and first section steel protect 1 to correspond, well festival connecting piece and well festival steel protect 2 to correspond, the tail section connecting piece protects 3 to correspond with the tail section steel, connect through coupling mechanism between every section connecting piece, coupling mechanism includes fishing spear 4 and salvage hole 12, the cooperation between fishing spear 4 and the salvage hole 12 is connected and has been realized the connection between each section connecting piece. If the first-section connecting piece is connected with the middle-section connecting piece, the number of fishing holes 12 is still two, the fishing holes are respectively arranged on two transverse connecting rods 11 on the uppermost tightening mechanism on the middle-section connecting piece, longitudinal rods 404 of two fishing spears 4 which are in one-to-one correspondence with the two fishing holes 12 are respectively welded on two transverse connecting rods 11 on the lowermost tightening mechanism on the first-section connecting piece, when a transverse flange 6 on the first-section steel casing 1 is aligned and attached with a transverse flange 6 on the middle-section steel casing 2, the two fishing spears 4 on the first-section connecting piece automatically pass through the two fishing holes 12 on the middle-section connecting piece through a longitudinal operation cavity, and the two fishing spears 4 can complete the connection of the first-section connecting piece and the middle-section connecting piece after passing through the two fishing holes 12 respectively; the connection principle of the middle-section connecting piece and the tail-section connecting piece is the same as that of the first-section connecting piece and the middle-section connecting piece, and the description is omitted here.
In this embodiment, the terminal surface of the flange strip 7 on every section of steel protects a section of thick bamboo and the terminal surface of transverse flange 6 all flush for when each section of steel protects a section of thick bamboo equipment, when each section of steel protects transverse flange 6 on a section of thick bamboo and laminates each other, the terminal surface of the flange strip 7 on each section of steel protects a section of thick bamboo also laminates, thereby does not have the gap between the flange strip 7 on each section of steel protects a section of thick bamboo, the dead circumstances of card appears when can not causing the connecting piece to take out, also can not cause the leakage condition between each section of flange strip 7.
In this embodiment, the connecting pieces are connected together by using the matching manner of the fishing spear 4 and the fishing hole 12, so that when the connecting pieces are taken out, the connecting pieces can be taken out from the longitudinal operation cavity together only according to the taking-out method in the first embodiment, so that the left half barrel and the right half barrel in each section of steel casing can be separated, the separated left half barrel and the separated right half barrel are still connected together through the transverse flange 6, the separated right half barrel and the separated left half barrel are also still connected together through the transverse flange 6, and the left half barrel and the right half barrel can be respectively pulled out through the pulling-out method in the first embodiment.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (5)
1. A longitudinal separation type steel pile casing sinking and pulling construction method is characterized by comprising the following steps: the method comprises the following steps:
(1) Assembling a steel casing, wherein the steel casing comprises a left half cylinder and a right half cylinder, the left half cylinder and the right half cylinder are connected through two groups of flange strips (7), each group of flange strips (7) is provided with a longitudinal operation cavity, a connecting piece is connected in the longitudinal operation cavity in a sliding manner, and the transverse extrusion force between the connecting piece and the longitudinal operation cavity is changed by adjusting the connecting piece until the left half cylinder and the right half cylinder are tightly connected;
(2) Sinking the steel protecting cylinder, vertically vibrating the steel protecting cylinder by a hoisting vibration hammer and pressing the steel protecting cylinder into the soil, exposing the steel protecting cylinder and the connecting piece to the original ground for 40-60cm, and backfilling and tamping the periphery of the steel protecting cylinder layer by using clay;
(3) The steel protection cylinder is pulled out, a fishing hole (12) is formed in the connecting piece, a fishing spear (4) is inserted into the fishing hole (12), the top end of the fishing spear (4) is connected with a fishing rope, the other end of the fishing rope is connected with a hoisting machine, the fishing spear (4) is clamped below the fishing hole (12) after being inserted into and penetrating through the fishing hole (12), the connecting piece is pulled out upwards from the longitudinal operation cavity through the hoisting machine to separate flange strips (7), and then a left half cylinder and a right half cylinder after separation are respectively taken out;
an operation interval is formed between each group of the flange strips (7), longitudinal grooves (701) with T-shaped longitudinal sections are oppositely arranged on the opposite surfaces of each group of the flange strips (7), and the two longitudinal grooves (701) and the operation interval jointly form a longitudinal operation cavity;
the connecting piece comprises two oppositely arranged clamping strips (8), clamping grooves (801) with T-shaped longitudinal sections are oppositely arranged on opposite surfaces of the two clamping strips (8), the clamping grooves (801) penetrate through the bottoms of the clamping strips (8), a tightening mechanism is connected between the two clamping grooves (801) in a sliding clamping mode, the clamping strips (8) are connected in the longitudinal grooves (701) in a sliding clamping mode, and the transverse extrusion force between the clamping strips (8) and the longitudinal grooves (701) is changed by adjusting the tightening mechanism;
the tightening mechanism comprises two extrusion plates (9) which are arranged oppositely, the two extrusion plates (9) are in one-to-one correspondence sliding clamping connection in the two clamping grooves (801), the opposite surfaces of the two extrusion plates (9) are oppositely provided with transverse connecting rods (11), the two transverse connecting rods (11) are connected through a sleeve (10), the sleeve (10) is in threaded connection with one transverse connecting rod (11) and is in rotating clamping connection with the other transverse connecting rod (11), and the transverse extrusion force between the extrusion plates (9) and the clamping grooves (801) can be changed by rotating the sleeve (10);
when the sleeve (10) is rotated forwards or reversely, the sleeve (10) can enable the two transverse connecting rods (11) to be close to or away from each other, so that the distance between the two oppositely arranged extrusion plates (10) on the tightening mechanism is changed, when the two extrusion plates (9) are close to each other, the two extrusion plates (9) can respectively pull the two oppositely arranged clamping strips (8) to be close to each other, and therefore the assembly of the left half barrel and the right half barrel is achieved;
the number of the tightening mechanisms is multiple, and the tightening mechanisms are connected with one another through connecting ropes (15);
the two clamping grooves (801) are oppositely arranged, the inner side faces, close to each other, of the clamping grooves (801) are symmetrically provided with protruding blocks (802) which correspond to the extrusion plates (9) on the plurality of tightening mechanisms one by one, the protruding blocks (802) divide the clamping grooves (801) into loosening spaces (8011) and fastening spaces (8012) which are staggered up and down, the transverse width of each clamping strip (8) is smaller than that of the longitudinal groove (701), when the left half barrel and the right half barrel are tightly connected, each extrusion plate (9) is located in the corresponding fastening spaces (8012), when the top of the extrusion plate (9) on the tightening mechanism located at the top is abutted to the top of the clamping groove (801), each extrusion plate (9) is located in the corresponding loosening space (8011), the outer side face of the extrusion plate (9) is not extruded with the inner wall of the clamping groove (801), all the tightening mechanisms lose extrusion force on the two clamping strips (8), and finally, the vertical friction force between the connecting piece and the flange strips (7) is reduced to zero.
2. The longitudinal separation type steel casing sinking and extracting construction method according to claim 1, characterized in that: the fishing holes (12) are arranged on the two cross connecting rods (11) on the uppermost tightening mechanism.
3. The longitudinal separation type steel casing sinking and extracting construction method according to claim 1, characterized in that: the fishing spear (4) comprises a longitudinal rod (404), the bottom end of the longitudinal rod (404) is symmetrically provided with two hinged spearheads (401) through a transverse shaft (402), a spring (403) is arranged between the two spearheads (401), and the spring (403) penetrates through the longitudinal rod (404) and is positioned above the transverse shaft (402).
4. The longitudinal separation type steel casing sinking and extracting construction method according to claim 3, characterized in that: the tops of the two spearheads (401) are recessed downward in an arc shape.
5. The longitudinal separation type steel casing sinking and pulling construction method according to claim 1, wherein the longitudinal separation type steel casing sinking and pulling construction method comprises the following steps: the bottom of the flange strip (7) is provided with a spine part (14).
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| CN111851493A (en) * | 2020-08-21 | 2020-10-30 | 安徽省路桥工程集团有限责任公司 | Pile foundation pore-forming steel casing construction system and construction method |
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| JP4878360B2 (en) * | 2008-09-08 | 2012-02-15 | 株式会社設計室ソイル | Steel pipe fittings |
| CN210122718U (en) * | 2019-04-01 | 2020-03-03 | 浙江交工路桥建设有限公司 | Fastener fixing type recyclable pile foundation drilling steel casing |
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|---|---|---|---|---|
| CN101634146A (en) * | 2008-07-24 | 2010-01-27 | 邢利奥 | Manually digging hole full-steel cylinder-wall protecting construction device for building pile foundation and construction method thereof |
| KR101473361B1 (en) * | 2014-02-14 | 2014-12-16 | 현대건설주식회사 | Casing Apparatus and Method for Constructing In-situ Concrete Pile |
| CN110004929A (en) * | 2019-04-10 | 2019-07-12 | 安徽开源路桥有限责任公司 | The reusable plucking apparatus of cast-in-situ bored pile steel pile casting in water |
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Denomination of invention: A construction method for sinking and pulling out longitudinal separated steel casing Effective date of registration: 20230719 Granted publication date: 20230214 Pledgee: Zhejiang Tailong Commercial Bank Co.,Ltd. Wenzhou Lucheng Wuma Small and Micro Specialized Sub branch Pledgor: Wenzhou Hongyuan Construction Group Co.,Ltd. Registration number: Y2023980048905 |