CN112095580B - Precast pile in area corroded by chloride ions, preparation method of precast pile and construction method for reducing negative friction resistance of precast pile - Google Patents
Precast pile in area corroded by chloride ions, preparation method of precast pile and construction method for reducing negative friction resistance of precast pile Download PDFInfo
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- CN112095580B CN112095580B CN202010818154.7A CN202010818154A CN112095580B CN 112095580 B CN112095580 B CN 112095580B CN 202010818154 A CN202010818154 A CN 202010818154A CN 112095580 B CN112095580 B CN 112095580B
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- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 title claims abstract description 30
- 238000010276 construction Methods 0.000 title claims description 20
- 238000002360 preparation method Methods 0.000 title claims description 9
- 239000003973 paint Substances 0.000 claims abstract description 36
- 239000003822 epoxy resin Substances 0.000 claims abstract description 29
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 29
- 230000007935 neutral effect Effects 0.000 claims abstract description 26
- 239000004593 Epoxy Substances 0.000 claims abstract description 19
- 238000005096 rolling process Methods 0.000 claims abstract description 18
- 239000004576 sand Substances 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 79
- 239000010959 steel Substances 0.000 claims description 79
- 239000011248 coating agent Substances 0.000 claims description 22
- 238000000576 coating method Methods 0.000 claims description 22
- 239000010426 asphalt Substances 0.000 claims description 18
- 230000001680 brushing effect Effects 0.000 claims description 18
- 239000003245 coal Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 239000002689 soil Substances 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000003085 diluting agent Substances 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 239000011280 coal tar Substances 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 6
- 238000007596 consolidation process Methods 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000003653 coastal water Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011294 coal tar pitch Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005370 electroosmosis Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- 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
- E02D5/24—Prefabricated piles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/04—Apparatus or processes for treating or working the shaped or preshaped articles for coating or applying engobing layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/22—Apparatus or processes for treating or working the shaped or preshaped articles for cleaning
-
- 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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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a precast pile of a tidal marsh reclamation area corroded by chloride ions, which comprises a pile body, wherein the pile body is bounded by a neutral point, epoxy coal tar paint is uniformly coated above the neutral point of the pile body, epoxy resin is uniformly coated below the neutral point of the pile body in a rolling manner, and a yellow sand layer is arranged in the epoxy resin. This precast pile can not only reduce the harm that precast pile frictional resistance brought, can tolerate chloride ion to corrode in the later stage moreover to can improve pile foundation bearing capacity to a certain extent, reach permanent safety guarantee in utilization.
Description
Technical Field
The invention relates to a precast pile of a tidal marsh reclamation area corroded by chloride ions, a preparation method of the precast pile of the tidal marsh reclamation area corroded by the chloride ions, and a construction method for reducing the negative friction resistance of the precast pile of the tidal marsh reclamation area corroded by the chloride ions.
Background
With the implementation of the national ocean development strategy, the harbor industry of coastal provinces in China is developed vigorously, harbor buildings are built more and more, and most of the buildings are built on the reclamation land of the tidal flat area. The sea beach forms a construction land after reclamation, and soil layers in the reclamation area often show typical soil-short characteristics and have certain corrosivity. Because the engineering construction project foundation in the region is weak, a large amount of pile foundation forms are used, and the currently adopted pile forms are common pile forms such as prestressed high-strength concrete pipe piles, cast-in-situ bored piles and the like. In the using process of the pile, the fact that the upper part of the pile is provided with a thicker backfill layer and larger construction load to generate consolidation is discovered when soil layer consolidation is not completed, and along with the development of soil layer consolidation, the pile body generates larger negative friction force, so that hidden troubles are brought to the design and use of the pile.
Although the current methods for reducing the negative friction resistance of the pile foundation are many as follows: electroosmosis, jacketing, asphalt-coated stakes, peripheral protective stakes, and the like. However, the methods do not consider the corrosion of the piles by the chloride ions in the later period, so that the piles are extremely easy to corrode in areas rich in the chloride ions, the bearing capacity is reduced in the later period, and great hidden danger is caused to the safety performance of the building.
Disclosure of Invention
In view of the defects of the background art, the technical problem to be solved by the invention is to provide the preparation method of the precast pile in the coastal reclamation area corroded by the chloride ions, the method not only can reduce the harm caused by the friction resistance of the precast pile, but also can resist the corrosion of the chloride ions in the later period, and can improve the bearing capacity of the pile foundation to a certain extent, thereby achieving the long-term use safety guarantee.
Therefore, the precast pile of the coastal reclamation area corroded by the chloride ions comprises a pile body, wherein the pile body is bounded by a neutral point, epoxy coal asphalt paint is uniformly coated above the neutral point of the pile body, epoxy resin is uniformly coated below the neutral point of the pile body in a rolling manner, and a yellow sand layer is arranged in the epoxy resin.
The invention has the beneficial effects that:
(1) the precast pile preparation method and the construction method have the advantages of cheap raw materials, simple operation, strong practicability and good social benefit.
(2) Epoxy coal tar asphalt paint is coated above the neutral point of the precast pile, epoxy resin is coated below the neutral point to form a protective film of the precast pile, the epoxy resin has adhesive force, and yellow sand is adhered on the pile body, so that the precast pile can endure chloride ion corrosion in the precast pile period and can improve the bearing capacity of the pile foundation to a certain extent, and long-term use safety guarantee is achieved.
(3) Yellow sand covers below the neutral point of the precast pile, so that the friction force at the lower part of the neutral point of the pile body is increased, and the bearing capacity of the pile is improved.
(4) When the precast pile is driven into the ground, the steel sleeve is firstly driven into the ground, and the outer surface of the precast pile is protected by the steel sleeve when the precast pile is driven into the ground, so that the protection film on the outer surface of the precast pile is prevented from being worn in the process of driving into the ground.
(5) The wear-resistant paint is coated outside the steel sleeve, so that the friction force is reduced when the steel sleeve is driven into the ground, and the construction difficulty is reduced. Meanwhile, the wear-resistant paint protects the steel sleeve from being corroded, and the service life of the steel sleeve is prolonged.
(6) After the precast pile is driven, the steel sleeve is pulled out, the steel sleeve is reused, the cost is saved, and the economic benefit is high.
Drawings
FIG. 1 is a schematic view showing the construction of a precast pile for a tidal reclamation area corroded by chloride ions in the present invention;
FIG. 2 is a schematic view showing a steel casing connection structure of a precast pile for a tidal reclamation area corroded by chloride ions according to a first embodiment of the present invention;
FIG. 3 is a schematic view showing a steel casing connection structure of a precast pile for a reclamation area of shoal, which is corroded by chloride ions, according to a second embodiment of the present invention;
FIG. 4 is a schematic view of the retaining collar structure of a precast pile of FIG. 3 for a reclamation area of coastal waters subject to corrosion by chloride ions;
FIG. 5 is a schematic cross-sectional view of the retaining collar of a precast pile of FIG. 4 in a reclamation area of a sea area corroded by chloride ions;
FIG. 6 is a schematic view showing a steel casing connection structure of a precast pile for a reclamation area of coastal waters which are corroded by chloride ions according to a third embodiment of the present invention;
FIG. 7 is a schematic view showing a structure of a clamp of a precast pile for the reclamation area of shoal of FIG. 6, which is corroded by chloride ions;
FIG. 8 is a schematic view showing a structure of a clamp of a precast pile for the reclamation area of shoal of FIG. 7, which is corroded by chloride ions.
Detailed Description
Referring to fig. 1, the precast pile of the tidal reclamation area corroded by chloride ions provided by the invention comprises a pile body 1, wherein the pile body is bounded by a neutral point, epoxy coal asphalt paint is uniformly coated above the neutral point of the pile body, epoxy resin is uniformly coated below the neutral point of the pile body in a rolling manner, and a yellow sand layer is arranged in the epoxy resin.
The preparation method of the precast pile of the tidal reclamation area corroded by chloride ions, which is provided by the invention, comprises the following steps,
(1) constructing a precast pile body 1 according to design requirements, and calculating the post-construction settlement of a soft soil layer and the position 2 of a neutral point with negative frictional resistance according to basic parameters of the treated soil of the soft soil foundation, consolidation of foundation soil in the filling construction process and the thickness of the soft soil layer;
(2) determining the positions of a first coating area 3 and a second coating area 4 according to the position of a neutral point, wherein the first coating area 3 is above the neutral point of the precast pile body, and the second coating area 4 is below the neutral point of the precast pile body;
(3) firstly, cleaning the surface of a precast pile body, manually and uniformly rolling and brushing epoxy coal asphalt paint in a first coating area 3, wherein the number of times of rolling and brushing the epoxy coal asphalt paint is not less than two times, and the interval between every two times of rolling and brushing the epoxy coal asphalt paint is not less than 30 min. The total thickness of the epoxy coal tar pitch paint in the first coating area is not less than 2mm and not more than 5 mm.
Before brushing the epoxy coal asphalt paint in a rolling way, the epoxy coal asphalt paint is fully and uniformly stirred, the paint is stored in a ventilated, shady and dry place, and ventilation and exhaust are enhanced on a construction site. The epoxy coal asphalt paint uniformly covers the outer surface of the first coating area of the precast pile body to form a layer of protective film, and the coated epoxy coal asphalt paint is required to be flat and smooth. The epoxy coal asphalt paint on the outer surface of the precast pile body can resist the long-term corrosion of chloride ions and can improve the bearing capacity of the pile foundation to a certain extent.
(4) And (3) uniformly rolling and brushing the epoxy resin in the second coating area 4 manually, wherein the number of times of rolling and brushing the epoxy resin is more than two times, and the interval between the rolling and brushing of the epoxy resin is not less than 30min each time. The epoxy resin needs to be fully stirred before use, the epoxy resin is uniformly coated in the second coating area 4 below a neutral point, ventilation is enhanced on a construction site, the exhaust construction temperature is not lower than 5 ℃ and not higher than 35 ℃, and the epoxy resin is stored in a ventilated, cool and dry place. And immediately spraying yellow sand with the diameter of 1mm after the second epoxy resin rolling brushing is finished, and continuously rolling brushing the epoxy resin, wherein the total thickness of the epoxy resin is 2mm.
The epoxy resin forms a layer of protective film on the outer surface of the precast pile, and the protective film is smooth and clean. The epoxy resin can resist the long-term corrosion of chloride ions and improve the bearing capacity of the pile foundation. The epoxy resin has adhesive force, the yellow sand is adhered to the pile body, and the yellow sand can increase the friction force below the neutral point of the precast pile, so that the bearing capacity of the pile is improved. Meanwhile, the yellow sand and the soil layer are soil bodies and are easy to combine, and the pile body and the soil layer are easy to combine to form a firmer integral structure.
(5) And after finishing coating the first coating area 3 and the second coating area 4, waiting for at least 7 days for complete curing, detecting the coating uniformity, the thickness and the film forming effect, and finishing the preparation of the precast pile after the detection is qualified.
Referring to fig. 1 and 2, there is also provided a first embodiment of a method for reducing the negative frictional resistance of a precast pile in a tidal reclamation area corroded by chloride ions, comprising the steps of,
(1) preparing a multi-section steel sleeve 5, and smearing wear-resistant paint on the outer surface of the steel sleeve 5;
the step of smearing the wear-resistant paint outside the steel sleeve comprises the steps of firstly mixing and stirring the diluent and the curing agent uniformly to form the wear-resistant paint, then polishing the bottom material of the steel sleeve, smearing the wear-resistant paint on the outer surface of the steel sleeve for the first time, smearing the wear-resistant paint for the second time after 24 hours, wherein the total thickness of the wear-resistant paint is not less than 1 MM.
(2) The pile sinking method comprises the steps of designing a pile sinking position, sequentially driving the steel sleeve 5 into the ground of the pile sinking position, fixedly connecting the next section of steel sleeve with the upper end of the steel sleeve after the steel sleeve 5 is driven into each section of steel sleeve, and continuously driving the steel sleeve into the ground, wherein adjacent steel sleeves can be fixedly connected in a welding mode. The multi-section steel sleeve 5 is driven into the ground in sequence until reaching a preset position, and the steel sleeve 5 can be hammered into the ground by adopting a vibration hammer. The outer surface of the steel sleeve 5 is coated with wear-resistant paint, so that friction force is greatly reduced, and the steel sleeve is protected from corrosion. The outer surface of the steel sleeve 5 is smoother than that of the precast pile, and meanwhile, the outer surface of the steel sleeve is coated with wear-resistant paint, so that friction force is greatly reduced, and negative friction resistance when the steel sleeve is hammered into the ground is eliminated.
(3) Drilling a core, taking soil, hollowing the inner cavity of the steel sleeve 5 to a preset position, and extracting seeped underground water;
(4) the prepared precast pile is driven into the inner cavity of the steel sleeve, and the protective film on the outer surface of the precast pile is not abraded in the underground driving process under the protection of the steel sleeve;
(5) after the precast pile is driven into the ground, the steel sleeve is pulled out, the steel sleeve 5 can be recycled, the cost is reduced, and the method is economical and efficient.
Referring to fig. 1, 3, 4 and 5, the present invention further provides a second embodiment of a method for reducing negative frictional resistance of a precast pile in a reclamation area of a coastal waters corroded by chloride ions, which has substantially the same steps as the first embodiment except that: and (2) sequentially driving the steel sleeve 5 underground at the pile sinking position, wherein after each section of steel sleeve 5 is driven, the next section of steel sleeve is fixedly connected with the steel sleeve at the upper end through a positioning retainer ring and is continuously driven underground, and the positioning retainer ring 6 is sleeved between the adjacent steel sleeves and is welded and fixed. The utility model discloses a steel casing pipe, including the rand body, location rand 6 includes the rand body, and the rand body is the annular, location rand 6 has annular draw-in groove 7 and lower annular draw-in groove 8 on having respectively towards the both ends face of adjacent steel casing pipe 5, and adjacent steel casing pipe 5 tip card is gone into respectively corresponding annular draw-in groove 7 and lower annular draw-in groove 8 on and welded fastening, fixes a position one section steel casing pipe next through location rand 6, and the workman's construction of being convenient for has shortened man-hour, labour saving and time saving, location rand 5 surface has by intermediate part to both ends smooth transition's inclined plane 9, and inclined plane 9 is convenient for steel casing pipe 5 hammer into the underground.
Referring to fig. 1, 6 and 7, there is further provided a third embodiment of a method for reducing negative frictional resistance of a precast pile in a reclamation area of an ocean reclamation area corroded by chloride ions, which has substantially the same steps as the first embodiment, except that: in the (2) step, squeeze into pile sinking position underground with steel casing pipe 5 in proper order, after steel casing pipe 5 adopted every one section steel casing pipe 5 of squeezing into, next section steel casing pipe 5 and the 5 detachable fixed connection of last section steel casing pipe back and continue to squeeze into the underground, through clamp 10 detachable fixed connection between the adjacent steel casing pipe, annular positioning rand 11 has first ring groove 12 and second ring groove 13 respectively towards the both ends face of adjacent steel casing pipe in the clamp 10, annular positioning rand 11.
The clamp 10 comprises a first clamp body 14 and a second clamp body 15 which are symmetrically arranged, one end of the first clamp body 14 is connected with one end of the second clamp body 15 through a hinge, the other end of the first clamp body 14 is fixedly connected with the other end of the second clamp body 15 through a bolt, one side of an annular positioning clamp ring 11 is fixed with the middle part of the inner wall of the first clamp body 14 or the inner wall of the second clamp body 15, and the upper end and the lower end of the inner wall of the first clamp body 14 and the inner wall of the second clamp body 15 are respectively provided with an arc surface pressing convex edge 16 extending in a box. During construction, the upper end part of the steel sleeve 5 is exposed after being driven into the ground, the exposed upper end part is clamped into the second annular clamping groove 13 of the annular positioning clamping ring 11, and the next steel sleeve is clamped into the first annular clamping groove 12 of the annular positioning clamping ring 11 to position the adjacent steel sleeves. And then the first hoop body 14 and the second hoop body 15 are fixed and screwed through bolts, and the cambered surface pressing convex edges 16 are respectively in close contact with the corresponding steel sleeves 5, so that the adjacent steel sleeves 5 are tightly and fixedly connected.
In the step (5), after the precast pile is driven into the ground, the steel sleeve 5 is pulled out, the steel sleeve 5 can be recycled, the cost is reduced, and the method is economical and efficient. The steel sleeve can be recovered into a plurality of sections by pulling out the steel sleeve and disassembling the clamp 10, so that the time and labor are saved for constructors.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. 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.
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 (2)
1. A construction method for reducing negative frictional resistance of a precast pile in a shoal reclamation area corroded by chloride ions is characterized by comprising the following steps: the pile body is bounded by a neutral point, epoxy coal asphalt paint is uniformly coated above the neutral point of the pile body, epoxy resin is uniformly coated below the neutral point of the pile body in a rolling manner, and a yellow sand layer is arranged in the epoxy resin;
the construction steps comprise the preparation of a first part of precast pile and the construction of a second part of precast pile;
the first part of precast pile is prepared by the following steps:
(1) constructing a pile body according to design requirements, and calculating the neutral point position of the prefabricated pile body according to the design;
(2) determining the positions of a first coating area and a second coating area according to the position of a neutral point, wherein the first coating area is above the neutral point of the precast pile body, and the second coating area is below the neutral point of the precast pile body;
(3) manually rolling and brushing the epoxy coal asphalt paint in a first coating area for at least two times, wherein the total thickness of the epoxy coal asphalt paint in the first coating area is not less than 2mm and not more than 5mm,
firstly, cleaning the surface of a precast pile, uniformly brushing and smearing epoxy coal asphalt paint in a first coating area, wherein the brushing and smearing of the epoxy coal asphalt paint are not less than 2 times, and the interval between brushing and smearing of the epoxy coal asphalt paint is not less than 30min each time;
(4) manually rolling and brushing the epoxy resin in the second coating area for more than two times, covering a layer of yellow sand after the epoxy resin is brushed for the second time,
and uniformly rolling and brushing epoxy resin in the second coating area for more than two times, wherein the interval between the epoxy resin brushing areas is not less than 30min, covering yellow sand with the diameter of 1mm after the epoxy resin rolling brushing is finished for the second time, and continuously rolling and brushing the epoxy resin, wherein the total thickness of the epoxy resin is 2mm.
(5) Completely solidifying and detecting to be qualified, and finishing the preparation of the precast pile;
the construction steps of the second part of precast pile are as follows:
(1) preparing a multi-section steel sleeve, smearing wear-resistant paint on the outer surface of the steel sleeve,
the step of smearing the wear-resistant paint outside the steel sleeve comprises the steps of firstly mixing and stirring a diluent and a curing agent uniformly to form the wear-resistant paint, then polishing the bottom material of the steel sleeve, smearing the wear-resistant paint on the outer surface of the steel sleeve for the first time, smearing the wear-resistant paint for the second time after 24 hours, wherein the total thickness of the wear-resistant paint is not less than 1 MM;
(2) designing a pile sinking position, driving the steel sleeves into the ground of the pile sinking position in sequence, driving the steel sleeves into the ground continuously after the next section of steel sleeve is connected with the upper end part of the driven steel sleeve by driving one section of steel sleeve at each time, driving the multiple sections of steel sleeves into the ground to a preset position in sequence in a mode of driving and welding at the same time,
the positioning retainer ring comprises a retainer ring body, the retainer ring body is annular, an upper annular clamp groove and a lower annular clamp groove are respectively arranged on the two end surfaces of the positioning retainer ring facing the adjacent steel sleeves, the end parts of the adjacent steel sleeves are respectively clamped into the corresponding upper annular clamp groove and the corresponding lower annular clamp groove and are welded and fixed, and the outer surface of the positioning retainer ring is provided with an inclined surface which smoothly transits from the middle part to the two ends;
(3) drilling a core, taking soil, hollowing the inner cavity of the steel sleeve to a preset position, and extracting seeped underground water;
(4) driving the prepared precast pile into the inner cavity of the steel sleeve;
(5) and after the precast pile is driven into the inner cavity, pulling out the steel sleeve.
2. The method for reducing the negative frictional resistance of the precast pile in the coastal reclamation area corroded by the chloride ions according to claim 1, which is characterized in that: through clamp detachable fixed connection between the adjacent steel casing pipe, annular location rand has in the clamp, annular location rand has first ring groove and second ring groove respectively towards the both ends face of adjacent steel casing pipe, the clamp is including the first hoop body and the second hoop body that the symmetry set up, first hoop body and second hoop body one end are through articulated connection, the first hoop body and second hoop body other end pass through bolt fixed connection, annular location rand side is fixed with first hoop body or second hoop internal wall intermediate part, the upper end and the lower extreme of first hoop body and second hoop internal wall all have the cambered surface that the incasement extends and compress tightly protruding edge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010818154.7A CN112095580B (en) | 2020-08-14 | 2020-08-14 | Precast pile in area corroded by chloride ions, preparation method of precast pile and construction method for reducing negative friction resistance of precast pile |
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| CN202010818154.7A CN112095580B (en) | 2020-08-14 | 2020-08-14 | Precast pile in area corroded by chloride ions, preparation method of precast pile and construction method for reducing negative friction resistance of precast pile |
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| JP2002097633A (en) * | 2000-09-22 | 2002-04-02 | Nippon Steel Corp | Buried pile, burying device and construction method for buried pile |
| CN104695433A (en) * | 2015-03-16 | 2015-06-10 | 中船第九设计研究院工程有限公司 | Construction method of bituminous coating pile in sandy foundation |
| CN209040117U (en) * | 2018-10-16 | 2019-06-28 | 山东科技大学 | The prefabricated sliceable anti-corrosion steel sleeve soil compaction of one kind pierces stake |
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Application publication date: 20201218 Assignee: ZHEJIANG ZHONGWEI CONSTRUCTION ENGINEERING DESIGN Co.,Ltd. Assignor: Wenzhou University Contract record no.: X2022330000815 Denomination of invention: Precast pile in chloride corrosion area and its preparation method and construction method for reducing negative friction of precast pile Granted publication date: 20220503 License type: Common License Record date: 20221222 |
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Application publication date: 20201218 Assignee: Zhejiang Yidong Engineering Technology Co.,Ltd. Assignor: Wenzhou University Contract record no.: X2024330000118 Denomination of invention: A method for preparing prefabricated piles and reducing negative friction resistance of prefabricated piles in areas corroded by chloride ions Granted publication date: 20220503 License type: Common License Record date: 20240614 |