CN109440762B - Construction method of filling pile for drainage pump station - Google Patents
Construction method of filling pile for drainage pump station Download PDFInfo
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- CN109440762B CN109440762B CN201811351688.2A CN201811351688A CN109440762B CN 109440762 B CN109440762 B CN 109440762B CN 201811351688 A CN201811351688 A CN 201811351688A CN 109440762 B CN109440762 B CN 109440762B
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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
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Abstract
The invention discloses a construction method of a cast-in-place pile for a drainage pump station, which comprises the following steps: (1) construction preparation; (2) measuring and lofting; (3) installing a positioning piece; (4) embedding the steel casing; (5) and (6) pouring concrete. The invention provides a technical scheme of a construction method of a cast-in-place pile for a drainage pump station, which has reasonable structural design and convenient construction, wherein before embedding a steel casing, a positioning piece is installed on a construction pile position, the steel casing is firmly limited in a limiting guide pipe through the design of the positioning piece, the embedding verticality of the subsequent steel casing is ensured, the deviation of the steel casing is effectively avoided, the embedding step of the subsequent steel casing is simplified, the accurate positioning of the embedding position of the steel casing is improved, and the positioning piece can also be used for compacting and shaping the soil around a pile column hole, so that the deformation and the collapse of the pile orifice are effectively prevented.
Description
Technical Field
The invention relates to a construction method of a cast-in-place pile for a drainage pump station.
Background
The cast-in-place pile is a pile formed by forming a hole in place and pouring concrete or reinforced concrete. Commonly used are: (1) drilling a cast-in-place pile: the pile is formed by using a spiral drilling machine, a diving drilling machine and the like to form holes on site and pouring concrete, and the construction has no vibration and does not squeeze soil, but the settlement amount of the pile is slightly larger. The auger drilling machine is suitable for cohesive soil, sandy soil, artificial filling and the like above the ground water level, drilled soil blocks ascend along spiral blades on a drill rod to the outside of a discharge hole, the aperture is about 300mm, the drilling depth is 8-12 m, and the drill rod is selected according to soil quality and water content. The submersible drilling machine is suitable for cohesive soil, sandy soil, silt, mucky soil and the like, and is particularly suitable for forming holes in soil layers with higher underground water level. The mud is used for protecting the wall in order to prevent the hole from collapsing when drilling. Drilling in clay with clear water to form mud to protect wall; prepared mud is injected into sandy soil for drilling. And circularly removing drilled soil scraps by using slurry, and cleaning the hole after the hole is drilled to the required depth to remove the soil scraps sinking at the bottom of the hole, so that the settling amount of the pile is reduced. The large-diameter cast-in-situ bored pile popularized and applied in large-scale projects such as high-rise buildings, bridges and the like is constructed by the method, the diameter of the pile is more than 1m, the bottom of the pile can be expanded, and the bearing capacity of a single pile can reach thousands of tons. (2) Sinking a pipe and pouring a pile: the steel pipe with reinforced concrete pile shoe (pile tip) or valve type pile shoe is sunk into the soil by hammering or vibration, then concrete is poured in and the pipe is pulled out simultaneously to form the pile. Hammering the cast-in-place pile by a hammer for sinking and pulling the pipe; the vibrating pipe sinking and pipe drawing of the vibration exciter is called a vibrating cast-in-place pile. The method is easy to cause the defects of pile breaking, necking, foot hanging pile, pile shoe water inlet, mud inlet and the like, and the inspection and the timely treatment are noticed during the construction. In addition, explosive expanding cast-in-place piles are provided, which are formed by expanding the bottom of a pile hole with explosive to increase the bearing capacity.
In the prior art, the immersed tube bored concrete pile has a higher requirement for the embedding verticality of the steel pipe during actual construction. In actual operation, the perpendicularity of the steel pipe is deviated frequently in the embedding process, so that the deviation between the actual pile hole and the center of the pile position is larger than a set value, the probability of collapse at the pile hole is increased, and certain potential safety hazards are caused. And when the verticality deviation of the steel pipe is large, the drill bit can be caused to drill downwards under the guide of the steel casing, serious adverse effect and even waste hole formation are probably caused to the verticality of the whole formed hole, and the construction cost and the construction period are increased.
Disclosure of Invention
The invention aims to provide a technical scheme of a construction method of a cast-in-place pile for a drainage pump station aiming at the defects in the prior art, the structural design is reasonable, the construction is convenient, a positioning piece is installed on a construction pile position before a steel pile casing is buried, the steel pile casing is firmly limited in a limiting guide pipe through the design of the positioning piece, the verticality of the subsequent steel pile casing is ensured, the deviation of the steel pile casing is effectively avoided, the burying step of the subsequent steel pile casing is simplified, the accurate positioning of the burying position of the steel pile casing is improved, the positioning piece can also be used for compacting and shaping the soil around a pile column hole, and the deformation and the collapse of the pile hole are effectively prevented.
In order to solve the technical problems, the technical scheme adopted by the invention is a construction method of a filling pile for a drainage pump station, which is characterized by comprising the following steps of:
(1) construction preparation;
(2) measuring and lofting:
selecting a measurement base point, carrying out closed measurement on a construction site to be constructed according to the measurement base point, measuring and placing a pile position according to a design drawing and actual terrain, and marking the center position of the pile position by adopting a bright color mark;
(3) installing a positioning piece:
a. firstly, inserting a positioning rod of 40cm into the center of a pile position to ensure the verticality of the positioning rod, and inserting the bottom end of the positioning rod into the soil by 15-20 cm;
b. then, installing a positioning steel plate, horizontally placing the positioning steel plate at the pile position, ensuring that the rod section of the positioning rod exposed at the upper end is completely positioned in a positioning hole in the center of the positioning steel plate, then adjusting the position of the positioning steel plate until the center position of the positioning hole is right opposite to the top surface of the positioning rod, then installing and fixing the positioning steel plate between the four corners and the ground by adopting foundation bolts, and then pulling out the positioning rod from the pile position;
c. then, installing a limiting guide pipe, completely clamping an insert ring at the bottom of the limiting guide pipe into the positioning hole, then rotating the limiting guide pipe until the fixing plates at two sides of the bottom of the limiting guide pipe are respectively opposite to two adjusting grooves symmetrically arranged on the positioning steel plate, and then installing and fixing the fixing plates and the positioning steel plate through screws;
d. then, mounting a limiting frame:
firstly, mounting L-shaped folded plates, taking one diameter of a limiting guide pipe as a mounting line, ensuring that two slots symmetrically arranged on a positioning steel plate are symmetrical about the center of the mounting line, then respectively mounting the two L-shaped folded plates at two ends of the mounting line, ensuring that the vertical end surfaces of the two L-shaped folded plates are in contact and tight contact with the outer side wall of the limiting guide pipe, and then mounting and fixing the L-shaped folded plates and the positioning steel plate through screws;
secondly, respectively installing the two compression bar assemblies at the outer sides of the two L-shaped folded plates, and respectively clamping the bottoms of the two vertical compression bars in the compression bar assemblies into the two adjusting grooves until the limiting rings on the vertical compression bars touch the top surface of the positioning steel plate;
thirdly, mounting the consolidation rods, firstly moving the two pressure rod assemblies to two ends of the adjusting groove respectively, then mounting the consolidation rods on two sides of the limiting guide pipe respectively, clamping one ends of the two consolidation rods with the corresponding transverse pressure rods to ensure that the transverse pressure rods are clamped in the clamping grooves of the consolidation rods, then adjusting the positions of the transverse pressure rods clamped with the consolidation rods until the transverse pressure rods are contacted and abutted with the end surfaces of the corresponding L-shaped folded plates, simultaneously penetrating the limiting columns on the L-shaped folded plates through the through holes on the transverse pressure rods, then using limiting nuts to limit and screw the limiting columns and the transverse pressure rods, then adjusting the positions of the pressure rod assemblies on the other sides to ensure that the transverse pressure rods in the pressure rod assemblies are clamped in the clamping grooves at the other ends of the consolidation rods, then continuously adjusting the positions of the transverse pressure rods until the transverse pressure rods are contacted and abutted with the end surfaces of the corresponding L-shaped folded plates, and simultaneously penetrating the limiting columns on the L-shaped folded plates through the through holes, then, a limiting nut is used for limiting and screwing the limiting column and the transverse pressing rod, and finally, a limiting ring and a positioning steel plate are installed and fixed through a screw;
e. inserting plates into the two inserting grooves in the positioning steel plate, adjusting the positions of the consolidation rods, ensuring that the two ends of the consolidation rods are respectively attached to the end faces of the inserting plates on the two sides, inserting the bottoms of the inserting plates into the soil by 20-30cm, adjusting the positions of the two consolidation rods on the transverse pressing rods, ensuring that the two consolidation rods are symmetrically arranged on the two sides of the limiting guide pipe, and installing and positioning the end parts of the consolidation rods and the inserting plates through screws;
(4) embedding a steel casing:
hoisting the steel casing by a crane, then lowering the steel casing downwards to enable the bottom of the steel casing to be completely positioned in the conical guide hopper at the top of the limiting guide pipe, then continuing to hoist the steel casing downwards, clamping the steel casing into the limiting guide pipe, continuing to lower the steel casing, adjusting the position of the steel casing to enable the steel casing to be just clamped into the insert ring, then applying vertical pressure to embed the steel casing into soil until the steel casing is embedded into an appointed hole depth, and removing soil at the center of the steel casing by adopting the cooperation of an impact drill and a grab bucket to form a pile hole;
(5) pouring concrete:
firstly, just putting the manufactured reinforcement cage into the pile hole, then putting a guide pipe into the reinforcement cage, then pouring concrete into the pile hole through the guide pipe, pulling up the steel casing while pouring until the steel casing is completely pulled out, and pouring to form a pile.
Further, in the step (4), when the steel pile casing is buried, the burying depth of the steel pile casing is segmented, after 50-60cm is buried each time, the percussion drill is firstly vertically extended into the center of the steel pile casing to drill, the grab bucket is then extended into the center of the steel pile casing to dig out the soil body at the center of the steel pile casing, the operation is repeated until the steel pile casing is buried into the specified hole depth, the burying depth of the steel pile casing is limited each time, the construction efficiency is ensured, and meanwhile, the verticality of the steel pile casing can be ensured.
Further, in step d's of step (3) step (c), the total length of consolidation pole equals with the nearest distance between two slots on the location steel sheet, ensures in the actual installation, and the consolidation pole just in time the joint is inserting between two picture pegs in the slot, the installation location of the consolidation pole of being convenient for so that the installation location between ditch board and the connecting plate, structural design is ingenious reasonable, and construction simple to operate is simple.
Furthermore, in the third step of step d of step (3), the height of the clamping grooves at the two ends of the consolidation rod is equal to the height of the transverse pressing rod, so that the transverse pressing rod is just clamped into the clamping grooves during installation, and the vertical deviation of the transverse pressing rod is limited.
Furthermore, in the step (4), the outer diameter of the steel casing is equal to the inner diameter of the insert ring, the outer diameter of the steel casing is smaller than the inner diameter of the limiting guide pipe, the outer diameter of the steel casing is limited, so that the practical operation requirements are met, the design is ingenious and reasonable, the inner diameter of the limiting guide pipe is larger than the outer diameter of the steel casing, the crane can easily place the bottom of the steel casing into the limiting guide pipe, the steel casing is initially limited through the limiting guide pipe, then the steel casing is continuously hung downwards along the limiting guide pipe, the position of the steel casing is finely adjusted, the steel casing is just clamped into the insert ring, the steel casing is further accurately positioned through the insert ring, the steel casing is limited in the insert ring, the overall verticality of the steel casing is effectively ensured, and in subsequent construction, the verticality of the steel casing does not need to be measured frequently, effectively simplifying the construction steps.
Further, in step (4), after the steel casing is buried in soil, the top height of the steel casing is ensured to be at least 0.5m higher than the ground, the top of the steel casing is set to be at least 0.5m higher than the bottom surface, so that the pollution to a construction site caused by the overflow of slurry in a pile hole during the pouring construction can be prevented, certain resource loss is caused, the installation structure is reasonable in design, and the actual pouring construction is more convenient.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the invention has smart and reasonable integral design and is convenient for practical operation and construction, the design of the installation positioning piece can ensure that the circle center position of the plane of the steel casing is always consistent with the design center of the pile, thereby reducing or avoiding collision between the steel reinforcement cage and the wall of the pile hole when the steel reinforcement cage is installed in the pile hole, simplifying the subsequent hoisting operation of the steel reinforcement cage, avoiding the damage to a mud film and the wall of the pile hole due to deformation and collision of the steel reinforcement cage in the hoisting process, reducing the probability of collapse of the wall of the pile hole, ensuring the integral verticality of the formed pile hole, avoiding the serious inclination phenomenon of the steel casing, causing serious adverse effect on the verticality of the whole pile hole and even forming a waste hole, effectively ensuring the quality of formed holes through the positioning piece, ensuring the load of the poured pile to reach the specified design standard, and improving the structural strength and quality of the pile, the service life of extension stake, also be convenient for simultaneously follow-up percussion bit and grab bucket when carrying out the operation to the soil body in the steel protects a section of thick bamboo, avoid percussion bit or rotary bucket to appear the card firm condition when the operation in the steel protects a section of thick bamboo to the actual operation of being more convenient for reduces the operation degree of difficulty.
In the invention, the positioning piece is installed before the steel casing is embedded, so that the overall verticality of the steel casing in the whole installation process can be ensured, the circle center position of the steel casing is always consistent with the design center of the pile column, in the actual operation, the self gravity of the steel casing is larger, when the verticality of the upper part of the steel casing is ensured, the lower part of the steel casing is kept to vertically descend under the self gravity action, the upper part of the steel casing is always firmly clamped in the positioning piece through the ingenious design of the limiting guide pipe in the positioning piece, the verticality of the upper part of the steel casing is effectively ensured, the overall verticality of the steel casing is further ensured, the verticality of a formed pile column hole is ensured, and meanwhile, when the positioning piece is installed, the central position of a positioning hole on a positioning steel plate is always consistent with the design center position of the pile column through the auxiliary measurement, thereby ensure that subsequent steel protects a centre of a circle position of a section of thick bamboo unanimous with pile design central point and put, for among the prior art at the steel protect the section of thick bamboo bury the in-process underground, many times carry out actual measurement's design to the straightness that hangs down of steel protect a section of thick bamboo, make whole construction convenience more, and among the prior art because the upper portion of steel protect a section of thick bamboo does not have the binding force, so the steel protects a section of thick bamboo and bury the easy run-off of taking place in-process upper portion underground, and the self gravity of steel protect a section of thick bamboo is great, so measure and correct steel protect a section of thick bamboo straightness and can increase construction cost and artifical intensity of labour many times, and just carry out the detection of straightness that hangs down through simple level.
The positioning piece is assembled and fixed by a plurality of components, the components are gradually installed during installation, accurate positioning between a positioning hole on a positioning steel plate in the positioning piece and a designed pile hole is effectively ensured, compared with the method of directly adjusting and operating the position of the steel pile casing, the construction operation steps are effectively simplified, the peripheral soil of the designed pile hole is flattened and compacted by the positioning steel plate, the structural stability of the peripheral soil is improved, the pile hole can be reserved by the positioning hole at the center of the positioning steel plate, the subsequent positioning clamping of the steel pile casing is convenient, meanwhile, the positioning steel plate is fixed with the ground by the foundation bolt, the movement of the positioning steel plate is effectively avoided, the steel pile casing can be limited by the design of the limiting guide pipe, the circle center position of the steel pile casing is always kept consistent with the center position of the designed pile hole, and the pile forming quality is improved, the limiting guide pipe is fixed with the positioning steel plate through a screw, the limiting guide pipe is further firmly limited and clamped with the limiting frame, the two sides of the limiting guide pipe are limited and clamped through an L-shaped folded plate in the limiting frame, the limiting guide pipe is further compressed and positioned through pressure rod assemblies at the two sides, the L-shaped folded plate is compressed and positioned through transverse pressure rods at the two sides, the limiting guide pipe is indirectly limited, meanwhile, a limiting column on the L-shaped folded plate is further screwed and fixed with the transverse pressure rods through a limiting nut, the installation firmness between the transverse pressure rods and the L-shaped folded plate is further improved, the two ends of the transverse pressure rods are further positioned and installed with the positioning steel plate through vertical pressure rods, the connection strength between the limiting frame and the positioning steel plate is effectively ensured, the positioning steel plate is fixed again through an inserting plate, and the bottom of the inserting plate is inserted into soil to a certain depth so that the installation firmness between the positioning steel plate and the ground is effectively ensured, and then improve the stable in structure and the fastness of whole setting element to ensure the center of spacing pipe and the unanimity at design stake hole center, both can carry out indirect connection between two picture pegs through consolidating the firmware at last, can restrict the longitudinal deviation of horizontal depression bar again simultaneously, effectively ensure the structural strength of whole setting element, can not cause spacing pipe to take place the skew because striking etc. when guaranteeing that follow-up steel protects a section of thick bamboo and enters into spacing pipe.
The invention provides a technical scheme of a construction method of a cast-in-place pile for a drainage pump station, which has reasonable structural design and convenient construction, wherein before embedding a steel casing, a positioning piece is installed on a construction pile position, the steel casing is firmly limited in a limiting guide pipe through the design of the positioning piece, the embedding verticality of the subsequent steel casing is ensured, the deviation of the steel casing is effectively avoided, the embedding step of the subsequent steel casing is simplified, the accurate positioning of the embedding position of the steel casing is improved, and the positioning piece can also be used for compacting and shaping the soil around a pile column hole, so that the deformation and the collapse of the pile orifice are effectively prevented.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic view of the position structure of a positioning rod and a steel casing in the present invention;
FIG. 2 is a schematic view of an installation structure of the inserting plate and the positioning steel plate in the invention;
FIG. 3 is a schematic structural diagram of a positioning member according to the present invention;
FIG. 4 is a schematic view of the installation structure of the pressing rod assembly and the L-shaped folded plate according to the present invention;
FIG. 5 is a schematic view of an installation structure of a limiting guide pipe and a positioning steel plate according to the present invention;
FIG. 6 is a schematic view of the position limiting catheter of the present invention;
FIG. 7 is a schematic view of an installation structure of a limiting frame and a positioning steel plate according to the present invention;
FIG. 8 is a schematic view of the compression bar assembly of the present invention.
In the figure: 1-a positioning element; 2-positioning a steel plate; 3-positioning holes; 4-mounting holes; 5-a limiting catheter; 6-inserting a ring; 7-an adjusting tank; 8-a screw; 9-L-shaped folded plates; 10-slot; 11-a strut assembly; 12-a vertical compression bar; 13-a limit ring; 14-a consolidation rod; 15-transverse compression bar; 16-a limiting column; 17-perforating; 18-a limit nut; 19-inserting plates; 20-a steel casing; 21-fixing the plate; 22-a conical guide hopper; 23-a limiting frame; 24-card slot.
Detailed Description
As shown in fig. 1 to 8, the construction method of the cast-in-place pile for the drainage pump station is characterized by comprising the following steps:
(1) construction preparation;
(2) measuring and lofting:
selecting a measurement base point, carrying out closed measurement on the construction site according to the measurement base point, measuring and placing a pile position according to a design drawing and actual terrain, and marking the central position of the pile position by adopting a bright color mark, so that the subsequent adjustment of the central position of the positioning hole 3 is facilitated;
(3) installation of the positioning piece 1:
a. firstly, inserting a positioning rod of 40cm into the center of a pile position to ensure the verticality of the positioning rod, and inserting the bottom end of the positioning rod into the soil by 15-20 cm;
b. then, installing a positioning steel plate 2, horizontally placing the positioning steel plate 2 at a pile position, ensuring that a rod section of the positioning rod exposed at the upper end is completely positioned in a positioning hole 3 in the center of the positioning steel plate 2, then adjusting the position of the positioning steel plate 2 until the center of the positioning hole 3 is right opposite to the top surface of the positioning rod, then installing and fixing the peripheral corners of the positioning steel plate 2 and the ground by adopting foundation bolts, fixing the foundation bolts with the ground through an installing hole 4, and then pulling out the positioning rod from the pile position;
c. then, installing a limiting guide pipe 5, completely clamping an insert ring 6 at the bottom of the limiting guide pipe 5 into the positioning hole 3, then rotating the limiting guide pipe 5 until fixing plates 21 on two sides of the bottom of the limiting guide pipe 5 are respectively opposite to and opposite to two adjusting grooves 7 symmetrically arranged on the positioning steel plate 2, and then installing and fixing the fixing plates 21 and the positioning steel plate 2 through screws 8;
d. then, the installation of the limiting frame 23 is carried out:
firstly, mounting L-shaped folded plates 9, taking one diameter of a limiting guide pipe 5 as a mounting line, ensuring that two slots 10 symmetrically arranged on a positioning steel plate 2 are symmetrical about the center of the mounting line, then respectively mounting the two L-shaped folded plates 9 at two ends of the mounting line, ensuring that the vertical end surfaces of the two L-shaped folded plates 9 are in contact and tight contact with the outer side wall of the limiting guide pipe 5, and then mounting and fixing the L-shaped folded plates 9 and the positioning steel plate 2 through screws 8;
secondly, the two compression bar assemblies 11 are respectively arranged at the outer sides of the two L-shaped folded plates 9, and the bottoms of the two vertical compression bars 12 in the compression bar assemblies 11 are respectively clamped into the two adjusting grooves 7 until the limiting rings 13 on the vertical compression bars 12 touch the top surface of the positioning steel plate 2;
thirdly, mounting the consolidation rod 14, firstly moving the two pressure rod assemblies 11 to two ends of the adjusting groove 7 respectively, then mounting the consolidation rods 14 on two sides of the limiting guide pipe 5 respectively, clamping one ends of the two consolidation rods 14 with corresponding transverse pressure rods 15 to ensure that the transverse pressure rods 15 are clamped in clamping grooves 24 of the consolidation rods 14, then adjusting the positions of the transverse pressure rods 15 clamped with the consolidation rods 14 until the transverse pressure rods 15 contact and abut against the end surfaces of the corresponding L-shaped folded plates 9, simultaneously penetrating limiting columns 16 on the L-shaped folded plates 9 through holes 17 on the transverse pressure rods 15, then screwing the limiting columns 16 and the transverse pressure rods 15 at limited positions by limiting nuts 18, then adjusting the position of the pressure rod assembly 11 on the other side to ensure that the transverse pressure rods 15 in the pressure rod assemblies 11 are clamped into the clamping grooves 24 at the other ends of the consolidation rods 14, and then continuously adjusting the positions of the transverse pressure rods 15, until the transverse pressure rod 15 is contacted and abutted with the end surface of the corresponding L-shaped folded plate 9, the limiting column 16 on the L-shaped folded plate 9 penetrates through the through hole 17 on the transverse pressure rod 15, the limiting nut 18 is used for limiting and screwing the limiting column 16 and the transverse pressure rod 15, finally the limiting ring 13 and the positioning steel plate 2 are installed and fixed through the screw 8, the total length of the consolidation rod 14 is equal to the nearest distance between the two slots 10 on the positioning steel plate 2, and the practical installation is ensured, the consolidation rod 14 is just clamped between the two inserting plates 19 inserted into the inserting groove 10, so that the installation and the positioning of the consolidation rod 14 are convenient, the installation and the positioning between the water channel plate and the connecting plate are convenient, the structural design is ingenious and reasonable, the construction and the installation are convenient and simple, the heights of the clamping grooves 24 at the two ends of the consolidation rod 14 are equal to the height of the transverse pressing rod 15, when the installation is ensured, the transverse compression bar 15 is just clamped into the clamping groove 24 to limit the vertical deviation of the transverse compression bar 15;
e. finally, inserting plates 19 into the two inserting grooves 10 on the positioning steel plate 2, adjusting the positions of the reinforcing rods 14, ensuring that the two ends of each reinforcing rod 14 are respectively attached to the end faces of the inserting plates 19 on the two sides, inserting the bottoms of the inserting plates 19 into soil by 20-30cm, then adjusting the positions of the two reinforcing rods 14 on the transverse pressing rods 15, ensuring that the two reinforcing rods 14 are symmetrically arranged on the two sides of the limiting guide pipe 5, and installing and positioning the end parts of the reinforcing rods 14 and the inserting plates 19 through screws 8;
(4) embedding the steel casing 20:
the steel casing 20 is lifted by a crane, the steel casing 20 is lowered downwards, the bottom of the steel casing 20 is completely positioned in a conical guide bucket 22 at the top of a limiting guide pipe 5, the steel casing 20 is continuously lifted downwards, the steel casing 20 is clamped into the limiting guide pipe 5, the steel casing 20 is continuously lowered, the position of the steel casing 20 is adjusted, the steel casing 20 is just clamped into an insert ring 6, then vertical pressure is applied to embed the steel casing 20 into soil until the steel casing 20 is embedded to a specified hole depth, soil at the center of the steel casing 20 is removed by adopting the matching of an impact drill and a grab bucket to form a pile hole, the embedding depth of the steel casing 20 is segmented when the steel casing 20 is embedded, the impact drill vertically extends into the center of the steel casing 20 to drill a hole after being embedded by 50-60cm each time, the grab bucket extends into the center of the steel casing 20 to dig the soil at the center of the steel casing 20 outwards, the process is circulated until the steel casing 20 is embedded into a specified hole depth, the embedding depth of the steel casing 20 is limited each time, the construction efficiency is ensured, the verticality of the steel casing 20 can be ensured, the design is ingenious and reasonable, the construction is convenient and simple, the formed pile hole is firm in structure and not prone to collapse and deformation, the outer diameter of the steel casing 20 is equal to the inner diameter of the insert ring 6, the outer diameter of the steel casing 20 is smaller than the inner diameter of the limiting guide pipe 5, the outer diameter of the steel casing 20 is limited, the practical operation requirements are met, the design is ingenious and reasonable, the inner diameter of the limiting guide pipe 5 is larger than the outer diameter of the steel casing 20, a crane can easily place the bottom of the steel casing 20 into the limiting guide pipe 5, the steel casing 20 is primarily limited through the limiting guide pipe 5, then the steel casing 20 is hung downwards along the limiting guide pipe 5 continuously, the position of the steel casing 20 is finely adjusted, so that the steel casing 20 is just clamped into the insert ring 6, the steel casing 20 is further accurately positioned through the insert ring 6, the steel casing 20 is firmly limited in the insert ring 6, the overall verticality of the steel casing 20 is effectively ensured, in the subsequent construction, the verticality of the steel casing 20 is not required to be measured frequently, the construction steps are effectively simplified, after the steel casing 20 is buried into soil, the top end of the steel casing 20 is ensured to be at least 0.5m higher than the ground, the top end of the steel casing 20 is designed to be at least 0.5m higher than the bottom surface, the pollution to a construction site caused by the fact that slurry in a pile hole overflows from the inside and outside of the pile hole during pouring construction can be prevented, certain resource loss is caused, the installation structure is reasonable in design, and actual pouring construction is facilitated;
(5) pouring concrete:
firstly, just putting the manufactured reinforcement cage into the pile hole, then putting the guide pipe into the reinforcement cage, then pouring concrete into the pile hole through the guide pipe, pulling the steel casing 20 upwards while pouring until the steel casing 20 is completely pulled out, and pouring to form a pile.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the invention has smart and reasonable integral design and is convenient for practical operation and construction, the design of the installation positioning piece 1 can ensure that the circle center position of the plane of the steel casing 20 is always kept consistent with the design center of the pile, thereby reducing or avoiding collision between the steel reinforcement cage and the wall of the pile hole when the steel reinforcement cage is installed in the pile hole, simplifying the subsequent hoisting operation of the steel reinforcement cage, avoiding the damage to a mud film and the wall of the pile hole due to deformation and collision of the steel reinforcement cage in the hoisting process, reducing the probability of collapse of the wall, ensuring the integral verticality of the formed pile hole, avoiding serious inclination of the steel casing 20 and serious adverse effect on the verticality of the whole pile hole or even forming a waste hole, effectively ensuring the quality of formed holes and piles through the positioning piece 1, ensuring the load of the poured pile to reach the specified design standard, and improving the structural strength and quality of the pile, the service life of extension stake, also be convenient for simultaneously when follow-up percussion bit and grab bucket carry out the operation to the soil body in the steel protects a section of thick bamboo 20, avoid percussion bit or rotary bucket appear the card firm condition when the operation in steel protects a section of thick bamboo 20 to the operation of the reality of being more convenient for reduces the operation degree of difficulty.
In the invention, the positioning piece 1 is installed before the steel casing 20 is embedded, so that the overall verticality of the steel casing 20 in the whole installation process can be ensured, the circle center position of the steel casing 20 is always kept with the design center of the pile column, and in the actual operation, as the self gravity of the steel casing 20 is larger, when the verticality of the upper part of the steel casing 20 is ensured, the lower part of the steel casing 20 is kept to be vertically lowered under the self gravity action, the upper part of the steel casing 20 is always firmly clamped in the positioning piece 1 through the ingenious design of the limiting guide pipe 5, so that the verticality of the upper part of the steel casing 20 is effectively ensured, the overall verticality of the steel casing 20 is further ensured, the verticality of the formed pile column hole is ensured, and meanwhile, when the positioning piece 1 is installed, the central position of the positioning hole 3 on the positioning steel plate 2 is always consistent with the design center position of the pile column through the auxiliary measurement, thereby ensure that subsequent steel protects a centre of a circle position of section of thick bamboo 20 and pile design central point and put unanimously, for among the prior art at steel protects a section of thick bamboo 20 the in-process of burying underground, carry out actual measurement's design to steel protecting a section of thick bamboo 20 perpendicularity many times, make whole construction more convenient, and among the prior art because the upper portion of steel protecting a section of thick bamboo 20 does not have the binding force, so steel protecting a section of thick bamboo 20 is burying underground in-process upper portion and taking place the skew easily, and the self gravity of steel protecting a section of thick bamboo 20 is great, so measure and correct steel protecting a section of thick bamboo 20 perpendicularity many times and can increase construction cost and artifical intensity of labour, and just carry out the detection of straightness through simple level bar or hammer ball, the artificial.
The positioning piece 1 is assembled and fixed by a plurality of components, the components are gradually installed during installation, accurate positioning between a positioning hole 3 on a positioning steel plate 2 in the positioning piece 1 and a designed pile hole is effectively ensured, position adjustment and operation are effectively simplified compared with the method of directly adjusting and operating the steel pile casing 20, the construction operation steps are effectively simplified, the peripheral soil of the designed pile hole is flattened and compacted by the positioning steel plate 2, the structural stability of the peripheral soil is improved, the pile hole can be reserved by the design of the positioning hole 3 at the center of the positioning steel plate 2, the subsequent positioning and clamping of the steel pile casing 20 are facilitated, meanwhile, the positioning steel plate 2 is fixed with the ground by anchor bolts, the movement of the positioning steel plate 2 is effectively avoided, the steel pile casing 20 can be limited by the design of a limiting guide pipe 5, and the circle center position of the steel pile casing 20 is always kept consistent with the center position of the designed pile hole, the quality of the formed hole pile is improved, the limiting guide pipe 5 is fixed with the positioning steel plate 2 through a screw 8 and is matched with the limiting frame 23 to further and firmly limit and clamp the position of the limiting guide pipe 5, the L-shaped folded plate 9 in the limiting frame 23 limits and clamps two sides of the limiting guide pipe 5, the limiting guide pipe 5 is further pressed and positioned through the pressure lever assemblies 11 on two sides, the transverse pressure levers 15 on two sides compress and position the L-shaped folded plate 9 to indirectly limit the limiting guide pipe 5, meanwhile, the limiting columns 16 on the L-shaped folded plate 9 are further screwed and fixed with the transverse pressure levers 15 through the limiting nuts 18, the mounting firmness between the transverse pressure levers 15 and the L-shaped folded plate 9 is further improved, two ends of the transverse pressure levers 15 are further positioned and mounted with the positioning steel plate 2 through the vertical pressure levers 12, and therefore the connection strength between the limiting frame 23 and the positioning steel plate 2 is effectively ensured, fix once more the location steel sheet 2 through picture peg 19 again, thereby it effectively ensures the installation fastness between location steel sheet 2 and the ground to insert certain degree of depth in soil to picture peg 19's bottom, and then improve the stable in structure and the fastness of whole setting element 1, thereby ensure the unanimity at spacing pipe 5's center and design stake hole center, both can carry out indirect connection between two picture pegs 19 through consolidating the firmware at last, can restrict the longitudinal deviation of horizontal depression bar 15 simultaneously again, effectively ensure the structural strength of whole setting element 1, can not cause spacing pipe 5 to take place the skew because of striking etc. when guaranteeing follow-up steel to protect a section of thick bamboo 20 to enter into spacing pipe 5.
The invention provides a technical scheme of a construction method of a cast-in-place pile for a drainage pump station, which has reasonable structural design and convenient construction, wherein before embedding a steel casing 20, a positioning piece 1 is installed on a construction pile position, the steel casing 20 is firmly limited in a limiting guide pipe 5 through the design of the positioning piece 1, the verticality of the subsequent steel casing 20 is ensured, the deviation of the steel casing 20 is effectively avoided, the embedding step of the subsequent steel casing 20 is simplified, the accurate positioning of the embedding position of the steel casing 20 is improved, and the positioning piece 1 can also compact and shape soil around a pile column hole, so that the deformation and the collapse of a pile column hole opening are effectively prevented.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple variations, equivalent substitutions or modifications based on the present invention to achieve substantially the same technical effects are within the scope of the present invention.
Claims (6)
1. A construction method of a filling pile for a drainage pump station is characterized by comprising the following steps:
(1) construction preparation;
(2) measuring and lofting:
selecting a measurement base point, carrying out closed measurement on a construction site to be constructed according to the measurement base point, measuring and placing a pile position according to a design drawing and actual terrain, and marking the center position of the pile position by adopting a bright color mark;
(3) installing a positioning piece:
a. firstly, inserting a positioning rod of 40cm into the center of a pile position to ensure the verticality of the positioning rod, and inserting the bottom end of the positioning rod into the soil by 15-20 cm;
b. then, installing a positioning steel plate, horizontally placing the positioning steel plate at the pile position, ensuring that the rod section of the positioning rod exposed at the upper end is completely positioned in a positioning hole in the center of the positioning steel plate, then adjusting the position of the positioning steel plate until the center position of the positioning hole is right opposite to the top surface of the positioning rod, then installing and fixing the peripheral corners of the positioning steel plate and the ground by adopting foundation bolts, and then pulling out the positioning rod from the pile position;
c. then, installing a limiting guide pipe, completely clamping an insert ring at the bottom of the limiting guide pipe into the positioning hole, then rotating the limiting guide pipe until the fixing plates at two sides of the bottom of the limiting guide pipe are respectively opposite to two adjusting grooves symmetrically arranged on the positioning steel plate, and then installing and fixing the fixing plates and the positioning steel plate through screws;
d. then, mounting a limiting frame:
firstly, mounting L-shaped folded plates, taking one diameter of a limiting guide pipe as a mounting line, ensuring that two slots symmetrically arranged on a positioning steel plate are symmetrical about the center of the mounting line, then respectively mounting the two L-shaped folded plates at two ends of the mounting line, ensuring that the vertical end surfaces of the two L-shaped folded plates are in contact and tight contact with the outer side wall of the limiting guide pipe, and then mounting and fixing the L-shaped folded plates and the positioning steel plate through screws;
secondly, respectively installing the two compression bar assemblies at the outer sides of the two L-shaped folded plates, and respectively clamping the bottoms of the two vertical compression bars in the compression bar assemblies into the two adjusting grooves until the limiting rings on the vertical compression bars touch the top surface of the positioning steel plate;
thirdly, mounting the consolidation rods, firstly moving the two pressure rod assemblies to two ends of the adjusting groove respectively, then mounting the consolidation rods on two sides of the limiting guide pipe respectively, clamping one ends of the two consolidation rods with the corresponding transverse pressure rods to ensure that the transverse pressure rods are clamped in the clamping grooves of the consolidation rods, then adjusting the positions of the transverse pressure rods clamped with the consolidation rods until the transverse pressure rods are contacted and abutted with the end surfaces of the corresponding L-shaped folded plates, simultaneously penetrating the limiting columns on the L-shaped folded plates through the through holes on the transverse pressure rods, then using limiting nuts to limit and screw the limiting columns and the transverse pressure rods, then adjusting the positions of the pressure rod assemblies on the other sides to ensure that the transverse pressure rods in the pressure rod assemblies are clamped in the clamping grooves at the other ends of the consolidation rods, then continuously adjusting the positions of the transverse pressure rods until the transverse pressure rods are contacted and abutted with the end surfaces of the corresponding L-shaped folded plates, and simultaneously penetrating the limiting columns on the L-shaped folded plates through the through holes, then, a limiting nut is used for limiting and screwing the limiting column and the transverse pressing rod, and finally, a limiting ring and a positioning steel plate are installed and fixed through a screw;
e. inserting plates into the two inserting grooves in the positioning steel plate, adjusting the positions of the consolidation rods, ensuring that the two ends of the consolidation rods are respectively attached to the end faces of the inserting plates on the two sides, inserting the bottoms of the inserting plates into the soil by 20-30cm, adjusting the positions of the two consolidation rods on the transverse pressing rods, ensuring that the two consolidation rods are symmetrically arranged on the two sides of the limiting guide pipe, and installing and positioning the end parts of the consolidation rods and the inserting plates through screws;
(4) embedding a steel casing:
hoisting the steel casing by a crane, then lowering the steel casing downwards to enable the bottom of the steel casing to be completely positioned in the conical guide hopper at the top of the limiting guide pipe, then continuing to hoist the steel casing downwards, clamping the steel casing into the limiting guide pipe, continuing to lower the steel casing, adjusting the position of the steel casing to enable the steel casing to be just clamped into the insert ring, then applying vertical pressure to embed the steel casing into soil until the steel casing is embedded into an appointed hole depth, and removing soil at the center of the steel casing by adopting the cooperation of an impact drill and a grab bucket to form a pile hole;
(5) pouring concrete:
firstly, just putting the manufactured reinforcement cage into the pile hole, then putting a guide pipe into the reinforcement cage, then pouring concrete into the pile hole through the guide pipe, pulling up the steel casing while pouring until the steel casing is completely pulled out, and pouring to form a pile.
2. The construction method of the cast-in-place pile for the drainage pumping station according to claim 1, characterized in that: in the step (4), when the steel casing is buried, the burying depth of the steel casing is segmented, after 50-60cm of steel casing is buried each time, a percussion drill is firstly vertically extended into the center of the steel casing to drill, then a grab bucket is extended into the center of the steel casing to dig out the soil body in the center of the steel casing, and the steps are repeated until the steel casing is buried into the specified hole depth.
3. The construction method of the cast-in-place pile for the drainage pumping station according to claim 1, characterized in that: in the step (3), the total length of the reinforcing rod is equal to the nearest distance between the two slots on the positioning steel plate.
4. The construction method of the cast-in-place pile for the drainage pumping station according to claim 1, characterized in that: in the step (3), the height of the clamping grooves at the two ends of the reinforcing rod is equal to the height of the transverse pressing rod.
5. The construction method of the cast-in-place pile for the drainage pumping station according to claim 1, characterized in that: in the step (4), the outer diameter of the steel casing is equal to the inner diameter of the insert ring, and the outer diameter of the steel casing is smaller than the inner diameter of the limiting guide pipe.
6. The construction method of the cast-in-place pile for the drainage pumping station according to claim 1, characterized in that: in the step (4), after the steel casing is buried in the soil, the height of the top end of the steel casing is ensured to be at least 0.5m higher than the ground.
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| CN114197473B (en) * | 2021-12-16 | 2023-01-17 | 广州市第三市政工程有限公司 | Limiting protection device for overwater platform reducing pile and construction method thereof |
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Denomination of invention: A construction method of cast-in-place pile for drainage pump station Effective date of registration: 20220720 Granted publication date: 20201016 Pledgee: Zhejiang Chouzhou Commercial Bank Co.,Ltd. Lishui branch Pledgor: ZHEJIANG JINGCHANG CONSTRUCTION Co.,Ltd. Registration number: Y2022330001475 |
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