CN113322943B - Occlusive pile and construction method thereof - Google Patents
Occlusive pile and construction method thereof Download PDFInfo
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- CN113322943B CN113322943B CN202110659929.5A CN202110659929A CN113322943B CN 113322943 B CN113322943 B CN 113322943B CN 202110659929 A CN202110659929 A CN 202110659929A CN 113322943 B CN113322943 B CN 113322943B
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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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
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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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
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Abstract
The invention relates to the technical field of secant pile construction, in particular to a secant pile and a construction method of the secant pile. A construction method of an occlusive pile comprises the following steps of S1, constructing to form a plurality of A concrete pile arranging holes; s2, respectively installing a first reinforcement cage in each A concrete pile arranging hole, installing an isolation box on the side surface of the first reinforcement cage according to the design size of a concrete protective layer, and enabling each isolation box to be located on the inner wall of the corresponding A concrete pile arranging hole; s3, pouring the concrete row piles A, and taking out the isolation box; s4, constructing at the reserved position of each isolation box and the position between two adjacent isolation boxes to form a B concrete row pile hole, wherein each B concrete row pile hole is positioned between two adjacent A concrete row piles; and S5, mounting a second steel reinforcement cage in each B concrete row pile hole, and pouring the B concrete row pile. The secant pile obtained by the construction method has a good supporting effect and a good water stopping effect.
Description
Technical Field
The invention relates to the technical field of secant pile construction, in particular to a secant pile and a construction method of the secant pile.
Background
The concrete protection layer is the minimum distance from the surface of concrete to the outer edge of the nominal diameter of the outermost steel bar of the part of concrete which plays a role in protecting the steel bar from being directly exposed in the concrete member.
The minimum thickness of the protective layer is specified in order for the concrete structural element to meet the requirements of durability and effective anchoring of the stressed reinforcement. The concrete protective layer is thick, and the stressed steel bar bonding anchoring performance, durability and fireproof performance of the member are better. However, an excessively large or small thickness of the protective layer may adversely affect the concrete member. Therefore, the thickness of the concrete protective layer is designed according to the related concrete structure design specification when in design.
The secant pile is a structure formed by partial circumference embedding between adjacent concrete piles. The construction of the occlusive piles is generally in a jumping-order construction. As shown in fig. 1 and fig. 2, the concrete piles a are constructed at intervals, and then the concrete pile B is constructed between two adjacent concrete piles a, so that the concrete piles a and the concrete piles B are partially circumferentially embedded to form the occlusive pile.
The secant pile formed by the mutual embedding of the circumferences of the parts between the adjacent concrete row piles has the supporting effect and the water stopping effect. In order to enhance the supporting effect of the occlusive pile, a reinforcement cage is generally arranged in the concrete row pile. However, part of the circumference between two connected concrete row piles is embedded, and the reinforcement cages in the existing concrete row piles can only be arranged at intervals due to the requirement of concrete protective layers in the concrete structure design specification. That is, in the view shown in fig. 2, a reinforcement cage is arranged in the concrete row pile a, and a reinforcement cage cannot be arranged in the concrete row pile B, otherwise, if a reinforcement cage is arranged in the concrete row pile B, the reinforcement cage in the concrete row pile B interferes with the reinforcement cage in the concrete row pile a when the concrete row pile B is constructed. So that the existing secant pile can only be a meat and vegetable secant pile.
At present, snap piles constructed by the existing snap pile construction method are all meat and vegetable snap piles, and as no steel reinforcement cage is arranged in the vegetable snap pile, the shear resistance and the bending resistance of the vegetable snap pile are poor. Although the existing meat and vegetable secant pile has a certain water stopping effect, the supporting effect is poor.
Disclosure of Invention
The invention aims to provide an occlusive pile and a construction method of the occlusive pile, aiming at the problems that in the prior art, the occlusive piles constructed by the existing occlusive pile construction method are meat-vegetable occlusive piles, and although the existing meat-vegetable occlusive piles have a certain water stopping effect, the support effect of the existing meat-vegetable occlusive piles is poor.
In order to achieve the above purpose, the invention provides the following technical scheme:
the utility model provides an occlusive pile, includes the A concrete campshed and the B concrete campshed of mutual interlock, be provided with first steel reinforcement cage in the A concrete campshed, be provided with the second steel reinforcement cage in the B concrete campshed.
The invention provides an occlusive pile, which comprises a concrete row pile A and a concrete row pile B, wherein the concrete row pile A and the concrete row pile B are mutually occluded, so that the occlusive pile provided by the application has a water stop effect; simultaneously, be provided with first steel reinforcement cage according to the design size of concrete protective layer in A concrete campshed to and be provided with the second steel reinforcement cage according to the design size of concrete protective layer in B concrete campshed, thereby make A concrete campshed and B concrete campshed all have stronger shear resistance and bending resistance. Therefore, the secant pile provided by the invention has a better supporting effect and a better water stopping effect.
A construction method of an occlusive pile comprises the following steps,
s1, constructing to form a plurality of concrete pile arranging holes A;
s2, respectively installing a first steel reinforcement cage in each concrete pile arranging hole A, installing an isolation box on the side surface of the first steel reinforcement cage according to the design size of a concrete protective layer, and enabling each isolation box to be located on the inner wall of the corresponding concrete pile arranging hole A;
s3, pouring concrete piles A, and taking out the isolation box;
s4, constructing at the reserved position of each isolation box and the position between every two adjacent isolation boxes to form a B concrete pile row hole, wherein each B concrete pile row hole is positioned between every two adjacent A concrete piles;
and S5, mounting a second reinforcement cage in each B concrete row pile hole, and pouring the B concrete row pile.
According to the construction method provided by the invention, the first reinforcement cage is arranged in the A concrete pile arranging hole, and the isolation box is arranged on the inner wall of the A concrete pile arranging hole. Thereby behind A concrete row stake is pour in A concrete row stake hole, can have first steel reinforcement cage in the A concrete row stake, and can reserve out the position of shielded box on the circumference of A concrete row stake. And the B concrete row pile hole is constructed and formed at the reserved position of each isolation box and the position between two adjacent isolation boxes, namely the B concrete row pile hole is constructed on the basis of the position of the isolation box, so when the B concrete row pile is poured, the A concrete row pile cannot be influenced, a second reinforcement cage can be installed in the B concrete row pile hole, and the B concrete row pile can be internally provided with the second reinforcement cage.
In the construction method provided by the invention, the condition that the isolation box is arranged on the side surface of the first reinforcement cage means that: the isolation box is arranged on the side face, close to the B concrete piling, of the second reinforcement cage; in particular, the insulation box may be mounted on one side, adjacent sides, or opposite sides of the first reinforcement cage.
The secant pile obtained by the construction method provided by the invention is not a meat-vegetable secant pile, and the concrete row piles A and the concrete row piles B in the secant pile obtained by the construction method provided by the invention are provided with reinforcement cages, so that the concrete row piles A and the concrete row piles B have stronger shearing resistance and bending resistance. Meanwhile, the concrete row piles A and the concrete row piles B are partially embedded, so that the secant pile obtained by the construction method has a good water stopping effect. Therefore, the secant pile obtained by the construction method has better supporting effect and better water stopping effect.
Further, step S1 comprises, after the step of,
s11, drilling a positioning hole at a target position;
s12, embedding a pile casing according to the positioning hole;
and S13, carrying out graded reaming in the pile casing until the concrete pile arranging hole A is formed.
Because the speed of directly drilling the large-diameter A concrete row pile hole is low, the construction method firstly drills a positioning hole at a target position and then drills the A concrete row pile hole in a grading reaming mode, so that the forming speed of the A concrete row pile hole can be effectively increased, and the construction progress can be effectively accelerated. In addition, before carrying out grading reaming based on the positioning hole, the pile casing is embedded by taking the positioning hole as a standard, so that in the forming process of the A concrete pile arranging hole, ground stones can be prevented from falling into the A concrete pile arranging hole and preventing the A concrete pile arranging hole from collapsing, and water on the outer surface layer of the A concrete pile arranging hole can be isolated.
Furthermore, one end of the isolation box is provided with a clamping groove part, and when the isolation box is installed in the concrete pile arranging hole A, the clamping groove part is clamped on the pile casing;
or one end of the isolation box is provided with a limiting part, and when the isolation box is installed in the concrete pile row hole A, the limiting part is lapped on the pile casing.
In the construction method, the isolation box is clamped or lapped on the protective cylinder, so that the isolation box is convenient to mount and is convenient to take out in the later period.
Further, a first communication hole and a second communication hole are formed in the isolation box, and the first communication hole and the second communication hole are arranged along the height direction of the isolation box; and a communication channel is arranged in the isolation box, one end of the communication channel is communicated with the first communication hole, and the other end of the communication channel is communicated with the second communication hole.
When the concrete piling A is poured, the isolation box is easy to float on the slurry surface due to the overlarge density of the slurry. The construction method is characterized in that the first communicating hole and the second communicating hole are formed in the height direction of the isolation box and are connected through the communicating channel, so that the isolation box is favorably sunk into slurry when the concrete row pile A is poured. In the present construction method, the arrangement of the first communication hole and the second communication hole in the height direction of the separator box means: when the isolation box is installed in the A concrete pile row hole, the first communication hole and the second communication hole are arranged up and down.
Furthermore, a limiting part is arranged on the first reinforcement cage and used for limiting the position of the first reinforcement cage in the pile casing. Through above-mentioned structure, when pouring A concrete campshed, can restrict the position of first steel reinforcement cage in protecting a section of thick bamboo to construction quality can be guaranteed.
Further, in step S2, a corrugated pipe for positioning the isolation box is installed in the concrete piling hole a to connect the corrugated pipe with the first reinforcement cage, and then the isolation box is installed on the corrugated pipe. Through the structure, the isolation box can be conveniently and accurately installed in the A concrete pile arranging hole.
Further, in S4, the concrete row pile holes B are rectangular holes.
In the construction method, the concrete pile row holes B are set to be rectangular holes, and finally formed secant piles are round-rectangular secant piles. In the construction method, the secant pile is in a round-rectangular secant pile form, so that the processing of a B concrete pile row hole is facilitated, and a second reinforcement cage is designed in the B concrete pile row hole according to related concrete structure design specifications, so that the round-rectangular secant pile obtained by the construction method can have a strong water stopping effect and a strong supporting effect.
Further, in S4, groove milling is conducted on the concrete row pile holes B through a groove milling machine.
The B concrete row pile hole of the construction method is constructed by adopting the milling groove, thereby being beneficial to ensuring the forming quality of the B concrete row pile hole and ensuring the rapid forming of the B concrete row pile hole.
Further, the top surface of the concrete row pile A is lower than the ground, and is right during the construction of the groove milling of the concrete row pile hole B, a steel plate used for the walking of the groove milling machine is laid on the side surface of the concrete row pile hole A.
In actual construction, the condition that the top surface of the A concrete row pile is lower than the ground surface can occur. At this time, the groove milling machine may be used to construct the B concrete row pile holes, so that the top surface of the a concrete row pile may be lower than the ground. In the construction method, the steel plate is arranged on the side face of the concrete piling hole A, so that the slot milling machine can conduct construction on the steel plate, and further, the load can be effectively shared, and the risk of equipment overturning caused by ground collapse is reduced.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides an occlusive pile which comprises a concrete pile A and a concrete pile B, wherein the concrete pile A and the concrete pile B are occluded with each other, so that the occlusive pile has a water stopping effect; simultaneously, be provided with first steel reinforcement cage according to the design size of concrete protective layer in A concrete campshed to and be provided with the second steel reinforcement cage according to the design size of concrete protective layer in B concrete campshed, thereby make A concrete campshed and B concrete campshed all have stronger shear resistance and bending resistance.
2. The interlocking pile obtained by the construction method provided by the invention is not a meat and vegetable interlocking pile, and the concrete row pile A and the concrete row pile B in the interlocking pile obtained by the construction method are both provided with steel reinforcement cages, so that the concrete row pile A and the concrete row pile B both have strong shearing resistance and bending resistance. Meanwhile, the concrete row piles A and the concrete row piles B are partially embedded, so that the secant pile obtained by the construction method has a good water stopping effect. Therefore, the secant pile obtained by the construction method has better supporting effect and better water stopping effect.
3. According to the construction method, the positioning hole is drilled at the target position, and then the concrete pile row hole A is drilled in a grading reaming mode, so that the forming speed of the concrete pile row hole A can be effectively increased, and the construction progress can be effectively accelerated. In addition, before carrying out grading reaming based on the positioning hole, the pile casing is embedded by taking the positioning hole as a standard, so that in the forming process of the A concrete pile arranging hole, ground stones can be prevented from falling into the A concrete pile arranging hole and preventing the A concrete pile arranging hole from collapsing, and water on the outer surface layer of the A concrete pile arranging hole can be isolated.
4. In the construction method, the B concrete pile row holes are constructed by milling grooves, so that the forming quality of the B concrete pile row holes can be ensured, and the rapid forming of the B concrete pile row holes can be ensured.
Description of the drawings:
fig. 1 is a schematic diagram of a construction position of a concrete pile row in the prior art.
Fig. 2 is a schematic structural view of a meat-vegetable interlocking pile in the prior art.
Fig. 3 is a schematic position diagram of the concrete pile row holes A and the concrete pile row holes B.
Fig. 4 is a schematic diagram of relative positions of the casing and the positioning hole.
Fig. 5 is a schematic structural view of the isolation box clamped on the protective sleeve.
Fig. 6 is a first structural schematic diagram of the isolation box.
Fig. 7 is a schematic view of the relative positions of the first reinforcement cage, the second reinforcement cage, and the steel plate.
Fig. 8 is a schematic structural diagram after a pile casing and a first reinforcement cage are installed in a concrete piling hole A.
Figure 9 is a schematic cross-sectional view of a bellows, an isolation box and a first rebar cage.
Fig. 10 is a second structural schematic diagram of the isolation box.
Fig. 11 is a schematic view of the structure of mounting an orifice hanger at a casing.
Fig. 12 is a schematic view of the bellows coupled to the first reinforcement cage.
Fig. 13 is a schematic view of the first reinforcement cage segment in a handling state.
Fig. 14 is a schematic view of a first rebar cage segment hanging on an aperture hanger.
The labels in the figure are: 1-A concrete pile arranging hole, 2-first steel reinforcement cage, 21-stirrup, 22-longitudinal steel reinforcement, 3-isolation box, 31-clamping groove part, 32-limiting part, 33-first communication hole, 34-second communication hole, 35-corrugated pipe, 36-limiting part, 4-B concrete pile arranging hole, 5-second steel reinforcement cage, 6-positioning hole, 7-pile casing, 8-steel plate and 9-ground.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
The embodiment provides an occlusive pile, which comprises a concrete row pile A and a concrete row pile B, wherein the concrete row pile A is occluded with the concrete row pile B, a first reinforcement cage 2 is arranged in the concrete row pile A according to the design size of a concrete protective layer, and a second reinforcement cage 5 is arranged in the concrete row pile B according to the design size of the concrete protective layer.
In the occlusive pile provided by the embodiment, the concrete row pile A and the concrete row pile B are occluded with each other, so that the occlusive pile provided by the embodiment has a water stopping effect; simultaneously, be provided with first steel reinforcement cage according to the design size of concrete protection layer in A concrete piling to and be provided with the second steel reinforcement cage according to the design size of concrete protection layer in B concrete piling, thereby make A concrete piling and B concrete piling all have stronger shear resistance and bending resistance.
In the occlusive pile provided by this embodiment, the specific structure of the a concrete row pile and the specific structure of the B concrete row pile are not limited, and for convenience of implementation, the cross-sectional shape of the a concrete row pile may be set to be circular, and the cross-sectional shape of the B concrete row pile may be set to be rectangular.
As shown in fig. 3 to 14, the present embodiment further provides a method for constructing an occlusive pile, which is used for constructing an occlusive pile in which a reinforcement cage is disposed in each of a concrete row pile a and a concrete row pile B, and specifically includes the following steps, S1, constructing to form a plurality of concrete row pile holes 1;
specifically, the drilling construction can be performed at the design position, and the drilling construction at the design position includes,
s11, drilling a positioning hole 6 at a target position;
s12, embedding the pile casing 7 according to the positioning hole 6;
and S13, carrying out graded reaming in the pile casing 7 until a concrete pile arranging hole 1A is formed.
Specifically, taking a concrete row pile hole 1 with a diameter of 3.5m as an example, as shown in fig. 4 and 5, a positioning hole 6 can be drilled at a target position. Then, a pile casing 7 with the diameter of 7.5m is buried into the ground 9 by using a vibration hammer, 0.5m is reserved on the ground 9, and then the positioning holes 6 are subjected to grading reaming. Preferably, the hole expansion can be carried out in three stages, wherein the hole expansion can be carried out by adopting a drill bit with the diameter of 2m for the first time, the hole expansion can be carried out by adopting the drill bit with the diameter of 2.8m for the second time, and the hole expansion can be carried out by adopting the drill bit with the diameter of 3.5m for the third time until the A concrete piling hole 1 is formed.
Since the speed of directly drilling the large-diameter a concrete row pile hole 1 is relatively slow, in the construction method of the embodiment, the positioning hole 6 is firstly drilled at the target position, and then the a concrete row pile hole 1 is drilled in a grading hole expanding manner, so that the forming speed of the a concrete row pile hole 1 can be effectively increased, and the construction progress can be effectively accelerated. In addition, before carrying out grading reaming based on the positioning hole 6, the pile casing 7 is embedded by taking the positioning hole 6 as a reference, so that in the forming process of the A concrete pile arranging hole 1, ground stones can be prevented from falling into the A concrete pile arranging hole 1 and preventing the A concrete pile arranging hole 1 from collapsing, and meanwhile, water on the outer surface layer of the inner hole of the A concrete pile arranging hole 1 can be isolated.
S2, after the A concrete pile row holes 1 are formed, respectively installing a first reinforcement cage 2 in each A concrete pile row hole 1, installing an isolation box 3 on the side face of each first reinforcement cage 2 according to the design size of a concrete protection layer, and enabling each isolation box 3 to be located on the inner wall of the corresponding A concrete pile row hole 1;
in the construction method of the embodiment, the isolation box 3 is installed at the side of the first reinforcement cage 2, which means that: the isolation box 3 is arranged on the side face, close to the B concrete piling, of the second reinforcement cage 2; specifically, the insulation box 3 may be installed on one side, adjacent two sides, or opposite two sides, etc. of the first reinforcement cage 2.
Further, as shown in fig. 5 and 6, in the construction method of the present embodiment, a snap groove portion 31 is provided at one end of the isolation box 3, and when the isolation box 3 is installed in the a concrete piling hole 1, the snap groove portion 31 is snapped to the pile casing 7. In the view shown in fig. 6, the notch portion 31 is located at the upper end of the isolation box 3. Specifically, the card slot portion 31 may be a card hook structure. In the construction method of the embodiment, the isolation box 3 is clamped on the pile casing 7, so that the isolation box 3 is convenient to install, and the isolation box 3 is convenient to take out in the later period.
Of course, in order to facilitate installation of the isolation box 3 and later removal of the isolation box 3, in the construction method of this embodiment, the isolation box 3 may also adopt a structure in which, as shown in fig. 10, one end of the isolation box 3 is provided with a limit portion 32, and when the isolation box 3 is installed in the a concrete piling hole 1, the limit portion 32 can be overlapped on the pile casing 7. Specifically, spacing portion 32 can select to be the steel sheet to when installing isolation box 3 in A concrete row stake hole 1, can make isolation box 3 overlap joint on protecting a 7 through the steel sheet, and then the installation of the isolation box 3 of can being convenient for, and the later stage be convenient for take out of isolation box 3.
When the concrete pile row A is poured, the isolation box 3 is easy to float on the slurry surface due to the overlarge density of the slurry. As shown in fig. 6 and 10, the isolation box 3 is provided with a first communicating hole 33 and a second communicating hole 34, and the first communicating hole 3 and the second communicating hole 34 are arranged along the height direction of the isolation box 3; the inside of the isolation box 3 has a communication passage, and one end of the communication passage communicates with the first communication hole 33 and the other end communicates with the second communication hole 34. Thereby helping the isolation box 3 to sink into the slurry when the concrete raft pile a is poured. In the construction method of the present embodiment, the arrangement of the first communication hole 33 and the second communication hole 34 in the height direction of the separator 3 means that: when the isolation box 3 is installed in the a concrete piling hole 1, the first communication hole 33 and the second communication hole 34 are vertically arranged.
In the construction method of this embodiment, the specific height of the isolation box 3 is not limited, and may be equal to or lower than the height of the a concrete row pile.
Further, when a concrete row pile a is poured, in order to ensure the position of the first reinforcement cage 2 in the casing 7, as shown in fig. 8, a limiting member 36 is arranged on the first reinforcement cage 2; preferably, one end of the limiting member 36 is welded to the first reinforcement cage 2, and the other end abuts against the sheath 7. Preferably, the limiting member 36 may be selected as a T-shaped steel.
As shown in fig. 9, in step S2, the bellows 35 is installed in the a concrete piling hole 1, the bellows 35 is used for positioning the isolation box 3, and then the isolation box 3 is installed on the bellows 35. Preferably, in order to ensure the accuracy of the installation position of the corrugated pipe 35 and further ensure the accurate installation of the isolation box 3 in the a concrete piling hole 1, the corrugated pipe 35 and the first reinforcement cage 2 may be connected through a steel bar, and when the corrugated pipe 35 is installed, the corrugated pipe 35 is lowered to the bottom of the a concrete piling hole 1 along with the first reinforcement cage 2, and the isolation box 3 is lowered after the first reinforcement cage 2 is lowered.
In addition, in the construction method of this embodiment, because the first reinforcement cage 2 is long in size, in order to facilitate the installation of the first reinforcement cage 2, the first reinforcement cage 2 can be segmented and assembled:
a. as shown in fig. 11, an orifice hanger is installed at the casing 7: firstly, the center position of the orifice hanging bracket and the center position of the pile casing 7 are mutually superposed, and then the elevation of the orifice hanging bracket is measured by measuring instruments such as a total station instrument and the like, so that the level of the orifice hanging bracket is ensured;
b. the first reinforcement cage 2 for hoisting the target section: after the adjustment of the plane position and the elevation of the orifice hanger is finished, hoisting the first reinforcement cage 2 of the target section;
as shown in fig. 12, before the first reinforcement cage 2 of the target segment is hoisted, the corrugated tube 35 and the first reinforcement cage 2 of the target segment may be connected together by steel wires, so as to hoist the corrugated tube 35 and the first reinforcement cage 2 of the target segment integrally;
c. installing a first reinforcement cage 2 of a target segment in the A concrete piling hole 1: after the first reinforcement cage 2 of the target section is hoisted to the opening of the concrete pile arranging hole 1A, the position of the first reinforcement cage 2 of the target section is adjusted, so that the first reinforcement cage 2 of the target section is positioned at the central position of the pile casing 7; then, a limiting piece 36 is arranged between the pile casing 7 and the first reinforcement cage 2 of the target section, so that one end of the limiting piece 36 is welded with the first reinforcement cage 2, and the other end of the limiting piece 36 is abutted against the pile casing 7; preferably, the limiting member 36 may be a T-shaped steel; then gradually lowering the first reinforcement cage 2 of the target section, and hanging the first reinforcement cage 2 of the target section on the orifice hanger; the perpendicularity of the first reinforcement cage 2 of the targeted section should be detected while the first reinforcement cage 2 of the targeted section is hung on the aperture hanger.
d. And (3) hoisting and constructing the first reinforcement cage 2 of the next target section: as shown in fig. 13, the first reinforcement cage 2 of the next target segment is hoisted to the orifice hanger, and the first reinforcement cage 2 of the next target segment is connected with the first reinforcement cage 2 of the previous target segment;
when the first reinforcement cage 2 of the next target section is connected with the first reinforcement cage 2 of the previous target section through a sleeve, the stirrup 21 at the bottom of the first reinforcement cage 2 of the next target section is not installed, so that the longitudinal reinforcement 22 of the first reinforcement cage 2 of the next target section has enough free end length, and further the position of the first reinforcement cage 2 of the next target section is convenient to adjust, and the first reinforcement cage 2 of the next target section is accurately butted with the first reinforcement cage 2 of the previous target section;
e. loosen the orifice hanger, lower 2 sections of first steel reinforcement cage after connecting: after the first reinforcement cage 2 of the next target section is connected with the first reinforcement cage 2 of the previous target section, hoisting the connected first reinforcement cage 2 section, and then loosening the orifice hanger so as to downwards place the connected first reinforcement cage 2 section; as shown in fig. 14, after lowering the connected first reinforcement cage 2 segment is completed, the connected first reinforcement cage 2 segment is hung on the aperture hanger; when the connected first reinforcement cage 2 is hung on the orifice hanger, the verticality of the connected first reinforcement cage 2 should be detected.
g. Assembling a first reinforcement cage 2: and e, the step d and the step e are circulated until the first reinforcement cage 2 is completely assembled, and the verticality of the first reinforcement cage 2 is detected.
S3, pouring the concrete row piles A, and taking out the isolation box 3 after the concrete row piles A are initially set; then, a crane is adopted to match with a vibration hammer to pull out the pile casing 7;
s4, as shown in the figure 3, after the isolation boxes 3 are pulled out, constructing at the reserved position of each isolation box 3 and the position between every two adjacent isolation boxes 3, and forming a concrete pile arranging hole 4B; namely, the concrete piling hole 4B is constructed by taking the position of connecting the two isolation boxes 3 as a foundation. Each concrete pile row hole 4B is positioned between two adjacent concrete pile rows A;
preferably, in the construction method of the embodiment, the B concrete row pile holes 4 are rectangular holes.
In the construction method of the embodiment, the concrete row pile holes 4 are rectangular holes, and the finally formed occlusive piles are round-rectangular occlusive piles. In the construction method of the embodiment, the secant pile is in the form of a round-rectangular secant pile, which is more beneficial to processing the B concrete pile arranging hole 4, and is beneficial to designing the second reinforcement cage 5 in the B concrete pile arranging hole 4 according to the related concrete structure design specification, so that the round-rectangular secant pile obtained by the construction method of the embodiment can have a strong water stopping effect and a strong supporting effect.
Further, in the construction method of the embodiment, the groove milling is performed on the B concrete row pile holes 4 by using a groove milling machine. The B concrete pile row holes 4 are constructed by milling grooves, so that the forming quality of the B concrete pile row holes 4 can be guaranteed, and the rapid forming of the B concrete pile row holes 4 can be guaranteed.
In actual construction, the top surface of the a concrete piling may be lower than the ground 9. At this time, the floor surface 9 of the top surface of the concrete raft a may collapse when the concrete raft B hole 4 is worked by the slot milling machine. In this case, as shown in fig. 7, in the construction method of the present embodiment, the steel plate 8 is provided on the side surface of the concrete piling hole a 1, so that the slot milling machine runs on the steel plate 8, and the risk of equipment overturning due to collapse of the ground 9 can be effectively shared.
And S5, as shown in fig. 7, installing a second reinforcement cage 5 in each B concrete pile row hole 4, and pouring the B concrete pile row.
In the construction method of the embodiment, a first reinforcement cage 2 is installed in the a concrete piling hole 1, and an isolation box 3 is installed on the inner wall of the a concrete piling hole 1. Thereby behind pouring A concrete campshed in A concrete campshed hole 1, can have first steel reinforcement cage 2 in the A concrete campshed, and can reserve the position of shielded box 3 on the circumference of A concrete campshed. And B concrete row pile hole 4 is in the reservation position of every shielded cell 3 to and the position construction between two adjacent shielded cells 3 forms, also promptly the B concrete row pile hole 4 is based on the position of shielded cell 3 and is under construction, so when pouring B concrete row pile, can not exert an influence to A concrete row pile, from can installing second steel reinforcement cage 5 in B concrete row pile hole 4, and then can make have second steel reinforcement cage 5 in the B concrete row pile.
The interlocking pile obtained by the construction method of the embodiment is not a meat and vegetable interlocking pile any longer, and the concrete row pile A and the concrete row pile B in the interlocking pile obtained by the construction method of the embodiment are provided with reinforcement cages, so that the concrete row pile A and the concrete row pile B have high shearing resistance and bending resistance. Meanwhile, the concrete row piles A and the concrete row piles B are partially embedded, so that the secant pile obtained by the construction method of the embodiment has a good water stopping effect. Therefore, the occlusive pile obtained by the construction method of the embodiment has a good supporting effect and a good water stopping effect.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A construction method of an occlusive pile is characterized by comprising the following steps: the secant pile comprises a concrete row pile A and a concrete row pile B which are mutually secant, wherein a first reinforcement cage (2) is arranged in the concrete row pile A, a second reinforcement cage (5) is arranged in the concrete row pile B,
the construction method comprises the following steps of,
s1, constructing to form a plurality of A concrete pile arranging holes (1);
s2, respectively installing a first reinforcement cage (2) in each A concrete pile arranging hole (1), installing an isolation box (3) on the side face of the first reinforcement cage (2) according to the design size of a concrete protective layer, and enabling each isolation box (3) to be located on the inner wall of the corresponding A concrete pile arranging hole (1);
s3, pouring concrete piles A, and taking out the isolation box (3);
s4, constructing at the reserved position of each isolation box (3) and the position between two adjacent isolation boxes (3) to form a B concrete pile arranging hole (4), wherein each B concrete pile arranging hole (4) is located between two adjacent A concrete piles;
s5, mounting a second reinforcement cage (5) in each B concrete row pile hole (4), and pouring B concrete row piles;
the isolation box (3) is provided with a first communication hole (33) and a second communication hole (34), and the first communication hole (33) and the second communication hole (34) are arranged along the height direction of the isolation box (3);
and a communication channel is arranged in the isolation box (3), one end of the communication channel is communicated with the first communication hole (33), and the other end of the communication channel is communicated with the second communication hole (34).
2. A method of constructing a bite pile as set forth in claim 1, wherein: the step S1 comprises the steps of,
s11, drilling a positioning hole (6) at a target position;
s12, embedding a pile casing (7) according to the positioning hole (6);
and S13, carrying out graded reaming in the pile casing (7) until the A concrete pile arranging hole (1) is formed.
3. A method of constructing a bite pile as set forth in claim 2, wherein: a clamping groove part (31) is formed in one end of the isolation box (3), and when the isolation box (3) is installed in the A concrete pile arranging hole (1), the clamping groove part (31) is clamped on the pile casing (7);
or one end of the isolation box (3) is provided with a limiting part (32), and when the isolation box (3) is installed in the concrete piling hole A (1), the limiting part (32) is lapped on the pile casing (7).
4. A method of constructing a bite pile as set forth in any one of claims 2 or 3, wherein: the first reinforcement cage (2) is provided with a limiting piece (36), and the limiting piece (36) is used for limiting the position of the first reinforcement cage (2) in the pile casing (7).
5. A method of constructing a bite pile as recited in any one of claims 1 to 3, wherein: in the step S2, a corrugated pipe (35) for positioning the isolation box (3) is installed in the concrete piling hole A (1), the corrugated pipe (35) is connected with the first reinforcement cage (2), and then the isolation box (3) is installed on the corrugated pipe (35).
6. A method of constructing a bite pile as recited in any one of claims 1 to 3, wherein: in S4, the concrete pile arranging holes (4) are rectangular holes.
7. A method of constructing a bite pile as recited in claim 6, wherein: and in S4, groove milling construction is carried out on the concrete row pile holes (4) through a groove milling machine.
8. A method of constructing a bite pile as recited in claim 7, wherein: a concrete row pile top surface is less than ground (9), right during B concrete row pile hole (4) milling flutes construction, the side of A concrete row pile hole (1) has been laid and is used for steel sheet (8) of milling flutes machine walking.
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