CN217378870U - Major diameter prestressed steel pipe concrete friction pile - Google Patents
Major diameter prestressed steel pipe concrete friction pile Download PDFInfo
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- CN217378870U CN217378870U CN202220214207.9U CN202220214207U CN217378870U CN 217378870 U CN217378870 U CN 217378870U CN 202220214207 U CN202220214207 U CN 202220214207U CN 217378870 U CN217378870 U CN 217378870U
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Abstract
The utility model relates to an anti-slide pile technical field, specifically a major diameter prestressed steel pipe concrete anti-slide pile, include installing a plurality of steel pipes between the landslide body and sliding bed, the steel pipe inner wall sets up the prestressed structure, and pour the concrete core pile in the steel pipe, the prestressed structure includes minor diameter steel pipe, prestressed steel strand, ground tackle and anchor pier support; the steel pipe inner wall welding has the anchor pier support, and anchor pier support one side is fixed with minor diameter steel pipe for fixed ground tackle, the opposite side, is fixed with a plurality of prestressing force steel strands through the ground tackle, and makes a plurality of prestressing force steel strands run through in the minor diameter steel pipe, and a plurality of steel pipes correspond the installation in proper order through the centering device that sets up on it and form major diameter prestressing force steel pipe concrete friction pile. The utility model discloses it is big to make prestressed steel pipe concrete friction pile reach rigidity, bears the dynamic height, green, economic effects's purpose.
Description
Technical Field
The utility model relates to an friction pile technical field specifically is a major diameter prestressed steel pipe concrete friction pile.
Background
China has various landforms and large relief, the infrastructure is rapidly promoted along with the development of economic society, and the construction of various engineering facilities in mountainous areas and hilly areas is gradually increased, such as newly-built roads and railways of various grades, large-scale reservoirs, mineral resource exploitation and the like. With the increase of engineering construction and human activities, various types of landslides also occur, particularly in mountainous regions with rich rainfall, landslide disasters are more frequent, normal operation of roads and railways is seriously affected, property loss and casualties are caused, so that engineering reinforcement treatment needs to be carried out on the mountains in an unstable state, and certain anti-skidding retaining measures are adopted. The anti-slide pile is a horizontal load-bearing pile, penetrates through a sliding surface and goes deep into a sliding bed to support and block the downward sliding of a sliding body and play a role in stabilizing a slope body, is suitable for the landslide of shallow layers and medium and thick layers, is used for balancing the downward sliding thrust of the landslide body by inserting the anti-slide pile into a stable stratum below the sliding surface and utilizing the embedding effect of a stable rock-soil body below a sliding surface to increase the stability of the landslide body, and when the landslide body slides downward, the anti-slide pile is subjected to the impedance of the anti-slide pile to enable the sliding body in front of the pile to reach a stable state. The existing anti-slide pile mainly comprises a cast-in-place concrete pile, is large in size, large in concrete consumption and long in site construction period, and many anti-slide piles adopt manual hole digging, so that the construction speed is low and the danger is high. There is therefore a need for a new anti-slide pile structure that is safer, more efficient and more environmentally friendly.
Steel pipe concrete structures have been used in a large number of different engineering constructions, especially in construction and bridge works. The concrete is poured into the steel pipes and then the concrete and the steel pipes are stressed together, the outer steel pipes have a hoop effect on the concrete inside, so that the concrete is in a triaxial stress state, the compressive strength of the concrete can be greatly improved, the lateral support of the concrete on the steel pipes can also avoid the instability and the damage of the concrete, and therefore, the steel pipe concrete structure shows good mechanical properties under the conditions of axial compression and small eccentric compression, and the concrete is convenient to construct and good in economic effect. The hoop function of the steel pipe concrete structure is greatly weakened when the steel pipe concrete structure is bent, and the bending resistance advantage is not obvious, so the application of the steel pipe concrete structure is limited to a certain extent.
SUMMERY OF THE UTILITY MODEL
For overcoming the problem that exists among the prior art, the utility model provides a major diameter prestressing force steel pipe concrete friction pile, the utility model discloses with steel pipe concrete structure and prestressed structure inter combination, form prestressing force steel pipe concrete friction pile, advantage separately can full play steel pipe structure, concrete and prestressing force technique to enlarge its range of application. The prestressed steel pipe concrete slide-resistant pile achieves the purposes of high rigidity, high bearing capacity, environmental protection and economic effect.
In order to achieve the above object, the utility model discloses a technical scheme specifically as follows:
the utility model provides a major diameter prestressing steel pipe concrete friction pile, includes at a plurality of steel pipes 1 of installation between the landslide body 12 and sliding bed 13, sets up prestressing force structure and pouring concrete core pile 2, its characterized in that in steel pipe 1 inside: the prestressed structure comprises a small-diameter steel pipe 4, prestressed steel strands 5, an anchorage device 7 and an anchor pier support 8; the welding of 1 inner wall one side of steel pipe has anchor pier support 8, and anchor pier support 8 one side is fixed with ground tackle 7, and the opposite side is fixed with minor diameter steel pipe 4, is fixed with a plurality of prestressing force steel strands 5 through ground tackle 7, and makes a plurality of prestressing force steel strands 5 run through in minor diameter steel pipe 4, and a plurality of steel pipes 1 correspond the installation in proper order through the centering device 10 that sets up on it and form major diameter prestressing force steel pipe concrete friction pile.
And a grouting protective layer 3 is coated on the outer surface of the steel pipe 1.
And the small-diameter steel pipe 4 and the prestressed steel strand 5 are manufactured in sections when the prestressed section is larger than 10 m.
And a structural reinforcing rib plate 9 is welded between the small-diameter steel pipe 4 and the anchor pier support 8.
The prestressed steel strand 5 comprises a common prestressed steel strand and an unbonded prestressed steel strand, the common prestressed steel strand is required to be poured with the grout body 6 in the small-diameter steel pipe 4, the unbonded prestressed steel strand is not required to be arranged with the small-diameter steel pipe 4, and the grout body 6 is not required to be poured in the unbonded prestressed steel strand.
The centering device 10 is composed of tenons and grooves arranged on the outer side of the steel pipe 1, and the three tenons and the grooves are arranged at an included angle of 90 degrees.
And the sound detection pipe 11 is arranged in the steel pipe 1.
The utility model has the advantages that: 1) the utility model discloses prestressing force steel pipe concrete friction pile adopts the prestressing force technique, can be better retrain the pile body concrete, the concrete is in the three-dimensional stress state, compressive strength improves greatly, plasticity and toughness improve, the effectual deformation that has reduced friction pile, in addition, this cast-in-place prestressing force steel pipe concrete pile can be according to design requirement batch production preparation steel pipe, on-the-spot pile splicing and fixed back pouring concrete, under the safe and reliable prerequisite is strutted in guaranteeing the side landslide, can reduce engineering cost, reduction of erection time and convenient construction. The construction speed is fast, does not need on-site binding of reinforcing steel bars, and the concrete can be poured after the steel pipes are installed in place.
2) The utility model overcomes many defects of steel pipe concrete friction pile and reinforced concrete friction pile can exert steel pipe, concrete and the respective characteristics of prestressing force technique, and its rigidity is big, and the pile body warp for a short time, and the pile bolck displacement is little.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural view of a second embodiment of the present invention;
FIG. 3 is a schematic view of the construction position of the present invention;
FIG. 4 is a schematic view of the installation of the pre-stressed structure;
FIG. 5 is a top view of a pre-stressed structure;
shown in the figure: the concrete core pile comprises a steel pipe 1, a concrete core pile 2, a grouting protection layer 3, a small-diameter steel pipe 4, a prestressed steel strand 5, a grouting body 6, an anchorage device 7, an anchor pier support 8, a structural reinforcing rib plate 9, a centering device 10, an acoustic pipe 11, a landslide body 12 and a slide bed 13.
Detailed Description
The technical solution of the present invention is further described by the following specific embodiments with reference to the accompanying drawings:
example 1
As shown in fig. 1, 3 and 4, the utility model provides a major diameter prestressed concrete filled steel tube friction pile, prestressed concrete filled steel tube friction pile's structure includes: the concrete core pile comprises a steel pipe 1, a concrete core pile 2, a grouting protection layer 3, a prestress structure, a centering device 10 and a sound measurement pipe 11. The prestressed structure comprises a small-diameter steel pipe 4, prestressed steel strands 5, an anchorage device 7, an anchor pier support 8 and a structural reinforcing rib plate 9.
As shown in fig. 1, a steel pipe 1 is manufactured in a factory according to the drawing, a concrete core pile 2 is cast in the steel pipe 1, and a grouting protective layer 3 is coated on the outer side of the steel pipe 1. And a prestressed structure is arranged on one side in the steel pipe 1. The prestressed structure comprises a small-diameter steel pipe 4, prestressed steel strands 5, an anchorage device 7 and an anchor pier support 8.
The prestressed structure is installed as shown in figure 4, an anchor pier support 8 is welded on one side of the inner wall of a steel pipe 1, an anchor 7 is fixed on one side of the anchor pier support 8, a small-diameter steel pipe 4 is fixed on the other side of the anchor pier support 8, the diameter of the small-diameter steel pipe 4 is 150 mm-300 mm, the anchor pier support 8 is made of a steel plate, and the thickness of the steel plate is 10 mm-20 mm. The anchorage device 7 is used for fixing the plurality of prestressed steel strands 5 and enabling the plurality of prestressed steel strands 5 to penetrate through the small-diameter steel pipe 4.
In order to ensure the stability of fixing the anchor pier support 8, structural reinforcing rib plates 9 are welded between the small-diameter steel pipe 4 and the anchor pier support 8 and between the small-diameter steel pipe 4, the anchor pier support 8 and the steel pipe 1.
The prestressed steel strand 5 is a common prestressed steel strand, and grouting needs to be performed in the small-diameter steel pipe 4 to form a grouting body 6 during field installation. The cement slurry used for the grouting body comprises cement, fine aggregate, a water reducing agent, an expanding agent and water. The water reducing agent accounts for 1-2% of the cement amount in the grouting body by mass; the expanding agent accounts for 6-8% of the cement consumption in the grouting body by mass percent.
During field installation, the steel pipe 1 is correspondingly installed in sequence through the centering device 10 arranged on the steel pipe to form the large-diameter prestressed steel pipe concrete slide-resistant pile, the centering device 10 is composed of tenons and grooves arranged on the outer side of the steel pipe 1, and the three tenons and the grooves are arranged according to an included angle of 90 degrees. The centering device 10 with the triangular design can ensure that the steel pipe 1 corresponds to the prestressed structure in position, and deviation cannot be generated during installation.
The acoustic pipe 11 is a channel reserved for the probe to enter the pile body during ultrasonic detection, and the pre-embedding mode of the probe in the pile and the arrangement form of the probe on the cross section of the pile are adopted to ensure the construction quality of the slide-resistant pile, so that the detection result is directly influenced.
The length of the sound measuring tube 11 is based on the length of the slide-resistant pile, the bottom and the top of the sound measuring tube are slightly higher than the slide-resistant pile by 20-30cm, the diameter of the sound measuring tube is 50mm, 4 sound measuring tubes are symmetrically arranged on the inner side of the slide-resistant pile, and the sound measuring tubes are uniformly distributed at 90 degrees. The bottom of the sounding pipe is required to be plugged when leaving a factory, and the top of the sounding pipe is plugged by a special end socket to prevent foreign matters from entering a plugged pore channel. The connection of the sounding pipe segments generally adopts the following 4 ways: the method comprises the following steps of flange plate screw connection, sleeve type welding, sleeve type iron wire binding and turnbuckle sleeve connection.
When the anti-slide pile steel pipe is short and is manufactured in a factory, the sounding pipe 11 is welded on the inner side of the steel pipe according to the requirements.
When the steel pipe 1 is long, the steel pipe is manufactured in sections in a factory and transported to a site for pile splicing. And after the steel pipe pile is connected, the sounding pipe is welded on the inner side of the steel pipe according to the requirements.
The construction steps comprise:
1. the method comprises the following steps of industrially producing a steel pipe 1 according to a design drawing, arranging a small-diameter steel pipe 4 along the axis of the steel pipe 1, penetrating a common prestressed steel strand, and then performing prestressed tendon pretensioning to ensure that the steel strand is not loosened along a straight anchorage device.
2. Mechanically forming a hole or manually digging the hole, and checking the depth of the hole. And selecting a drilling mode and equipment by combining factors such as construction efficiency, construction conditions, geological environment and the like. And (4) positioning the drilled holes, namely positioning the positions of the drilled holes by using corresponding measuring instruments on the basis of the construction drawing, and laying a bent frame by using steel pipes for positioning. In the process of drilling, the quality of the formed hole must be ensured, the quality of the formed hole including the aperture, the hole depth and the verticality of the drilled hole is controlled, and meanwhile, when the stability of the hole wall is poor, the hole collapse phenomenon possibly occurs and corresponding measures are prepared.
3. When the steel pipe 1 is manufactured in sections, the steel pipe is transported to the site to be welded, and the quality of a welding seam is checked; and (5) penetrating a prestressed steel strand and performing pretensioning.
4. And hoisting the steel pipe 1, and positioning and temporarily fixing. And (3) checking and accepting the steel pipe 1 according to design requirements, hoisting the steel pipe 1 by using a crane, hoisting the steel pipe into the pile hole to be in place, preventing the steel pipe 1 from deforming during hoisting, and paying attention to the fact that the steel pipe cannot collide with the wall of the pile hole. And after the steel pipe 1 is hoisted in place, measuring the verticality of the steel pipe 1, and temporarily fixing the steel pipe after the verticality is qualified.
5. And (5) pouring the concrete core pile 2. The pile body concrete is preferably premixed concrete with the strength grade required by design, before pouring, the slump constant of the pile body concrete is detected, and at least one group of test blocks are kept in each pile according to the specification. Pouring into the well by using the chute and the stringing barrel, and directly moving the discharge hole of the concrete pump into the hole for feeding if the fall of the concrete is not more than 2 m. When the depth of the pile hole exceeds 12m, concrete guide pipes are adopted for continuous layered pouring, and the pile is vibrated and compacted.
6. And after the concrete meets the requirement of 75% of the design strength, carrying out final tensioning on the common prestressed steel strand, wherein the tensioning device and the construction steps meet the design requirement.
7. Grouting the prestressed duct, wherein the grouting body used by the grouting body comprises cement, fine aggregate, a water reducing agent, an expanding agent and water; in this example, the types of the water reducing agent and the swelling agent are not particularly limited. In this embodiment, the water reducing agent accounts for preferably 1 to 2% by weight of the cement used in the grout body. The mass percentage of the expanding agent in the cement dosage in the grouting body is preferably 6-8%. The water-cement ratio of the slip is preferably 0.8. The grouting pressure is preferably 0.4-2 MPa.
8. Pouring anchor sealing concrete and curing, wherein the thickness of the concrete is not less than 10cm, and the strength is not less than C25.
Example two
As shown in fig. 2, 3 and 4, the utility model provides a major diameter prestressed steel pipe concrete friction pile compares in the ordinary prestressing steel strand wires of an embodiment adoption, and this embodiment adopts unbonded prestressing steel strand wires, does not set up minor diameter steel pipe 4 at prestressing force district section steel pipe inner wall. The unbonded prestressed steel strand can be tensioned for multiple times, the pretensioning is carried out in the step 3, and the tensioning is carried out to the designed value in the step 6; or the tension is performed to the design value in the step 3, and the step 6 in the first embodiment is not performed in the construction process.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the forms or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The utility model provides a major diameter prestressing steel pipe concrete friction pile, includes a plurality of steel pipes of installation between the landslide body and sliding bed, steel pipe inner wall sets up prestressing force structure to pouring concrete core pile, its characterized in that in the steel pipe: the prestressed structure comprises a small-diameter steel pipe, prestressed steel strands, an anchorage device and an anchor pier support; the steel pipe inner wall one side welding has the anchor pier support, and anchor pier support one side is fixed with the ground tackle, and the opposite side is fixed with minor diameter steel pipe, is fixed with a plurality of prestressing force steel strands through the ground tackle, and makes a plurality of prestressing force steel strands run through in the minor diameter steel pipe, and a plurality of steel pipes correspond the installation in proper order through the centering device that sets up on it and form major diameter prestressing force steel pipe concrete friction pile.
2. The large-diameter prestressed steel pipe concrete slide-resistant pile according to claim 1, characterized in that: and a grouting protective layer is coated on the outer surface of the steel pipe.
3. The large-diameter prestressed steel pipe concrete slide-resistant pile according to claim 1, characterized in that: and when the prestress section consisting of the small-diameter steel pipe and the prestress steel strand is more than 10m, manufacturing the steel pipe in a factory in sections.
4. The large-diameter prestressed steel pipe concrete slide-resistant pile according to claim 3, characterized in that: and structural reinforcing rib plates are welded between the small-diameter steel pipe and the anchor pier support and the steel pipe.
5. The large-diameter prestressed steel pipe concrete slide-resistant pile according to claim 1, characterized in that: the prestressed steel strand comprises a common prestressed steel strand and an unbonded prestressed steel strand, a small-diameter steel pipe needs to be arranged by adopting the common prestressed steel strand, and the small-diameter steel pipe does not need to be arranged by adopting the unbonded prestressed steel strand.
6. The large-diameter prestressed steel pipe concrete slide-resistant pile according to claim 1, characterized in that: the centering device is composed of tenons and grooves which are arranged on the outer side of the steel pipe, and the three tenons and the grooves are arranged according to an included angle of 90 degrees.
7. The large-diameter prestressed steel pipe concrete slide-resistant pile according to claim 1, characterized in that: and a sound detecting pipe is arranged in the slide-resistant pile.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220214207.9U CN217378870U (en) | 2022-01-26 | 2022-01-26 | Major diameter prestressed steel pipe concrete friction pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220214207.9U CN217378870U (en) | 2022-01-26 | 2022-01-26 | Major diameter prestressed steel pipe concrete friction pile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114232620A (en) * | 2022-01-26 | 2022-03-25 | 甘肃省交通规划勘察设计院股份有限公司 | Large-diameter prestressed steel pipe concrete slide-resistant pile and construction method thereof |
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- 2022-01-26 CN CN202220214207.9U patent/CN217378870U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114232620A (en) * | 2022-01-26 | 2022-03-25 | 甘肃省交通规划勘察设计院股份有限公司 | Large-diameter prestressed steel pipe concrete slide-resistant pile and construction method thereof |
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