CN108951334B

CN108951334B - Construction method of road subgrade structure

Info

Publication number: CN108951334B
Application number: CN201810968292.6A
Authority: CN
Inventors: 康颖
Original assignee: Huizhou Dayawan Municipal Infrastructure Co ltd
Current assignee: HUIZHOU DAYAWAN MUNICIPAL INFRASTRUCTURE Co.,Ltd.
Priority date: 2016-11-21
Filing date: 2016-11-21
Publication date: 2020-12-08
Anticipated expiration: 2036-11-21
Also published as: CN108951334A; CN106567303A; CN106567303B

Abstract

A construction method of a road subgrade structure comprises the following specific steps: digging a pile position pit and a side guard block corresponding to the tubular pile in the basal layer, burying the pile position pit and the side guard block into a groove required by the basal layer, taking the pile driver in place, lifting the precast pile to vertically align to the center of the pile position, slowly inserting the precast pile into the basal layer, then piling by using a drop hammer, wherein the maximum drop distance of the hammer is not more than 0.8 m, and stopping piling when the pile extends to a preset depth; after the bottom of the groove is tamped, the groove is hoisted and placed into the side guard block, then the base layer is tamped, after the first geotextile layer is covered on the upper portion of the base layer, a broken stone cushion layer is laid, an interface bonding layer is arranged between the concrete layer and asphalt to avoid the problems of pushing, cracking and the like caused by insufficient bonding force and reasons when the concrete layer is in direct contact with the asphalt layer, the stress generated by the crane load can be uniformly transmitted, the stress concentration phenomenon generated at the joint is effectively solved, and the bonding strength can reach 0.54-0.58MPa by using the interface bonding agent provided by the invention.

Description

Construction method of road subgrade structure

Technical Field

The invention relates to a construction method of a road subgrade structure, and belongs to the technical field of road construction.

Background

The rapidness, convenience and comfort of the road are one of the important signs whether the country is developed or not, and developed countries in the world all have intercity road networks. The road network is required to have the characteristics of high strength, high rigidity, good stability and durability, and the design parameters of the road must be kept within the required standard range when the road network is used. The road is more embodied in a strict control of the deformation of the embankment. The technical requirements of road foundation reinforcement cannot be met when deep and soft soil layers are deposited in inland lake facies, the conventional method usually modifies a line scheme or passes through the scheme in a bridge mode, and when the scheme is difficult to change or the bridge scheme is unconditionally implemented, the whole design scheme is infeasible. The roads are inevitably introduced into a plurality of towns above deep and weak soil layers of inland lake facies sediment zones, and the construction difficulty of the road embankment is very high.

Disclosure of Invention

A construction method of a road bed structure, the road bed structure comprising: the upper part of the pipe pile vertically extends out of the upper surface of the basal layer, side protection piers are arranged at two sides of the roadbed, the side protection piers partially extend into the basal layer, the partial cross section extending into the basal layer is rectangular, the partial cross section above the basal layer of the side protection piers is in a right trapezoid shape, a roadbed side slope surface is formed by a right trapezoid inclined section facing outwards, a first geotextile layer is laid above the basal layer, a gravel cushion layer is arranged on the first geotextile layer, a second geotextile layer is laid on the gravel cushion layer, a solidified filler layer is arranged on the second geotextile layer, the upper end of the pipe pile and the upper end of the side protection pier are flush with the surface of the solidified filler layer, a concrete pavement base layer is laid at the upper ends of the pipe pile, the side protection pier and the solidified filler layer, an interface bonding layer is arranged on the concrete pavement base layer, a bitumen layer is arranged, the curing agent comprises the following components in parts by mass: 1 part of sodium silicate, 0.8-0.9 part of fly ash, 0.2-0.3 part of ammonium sulfate, 0.2-0.3 part of cement clinker, 0.1-0.15 part of fluorite, 0.08-0.09 part of oxalic acid, 0.06-0.07 part of polyacrylamide, 0.04-0.05 part of calcium phosphate, 0.04-0.05 part of triethanolamine, 0.02-0.03 part of calcium chloride and 0.8-1.2 parts of water,

the tubular pile includes rectangular pipe body and the four-edge pyramis portion of body lower extreme, rectangular pipe body and the four-edge pyramis portion of rectangular pipe body lower extreme are concrete integrated into one piece, the inside muscle cage that is provided with of rectangular pipe body, the rectangular pyramid surface has a plurality of horizontal tooth portions, horizontal tooth portion is formed by the first face of tooth portion and the second face contained angle of tooth portion, the first face of tooth portion is the level, tooth portion second face one end is connected with the outside end that is the first face of horizontally tooth portion and forms contained angle A, contained angle A angle is 50-60 degrees, and tooth portion second face other end slope downwardly extending and adjacent tooth portion are the first face medial extremity of horizontally tooth portion and link to each other and form contained angle B, the partial surface coating in stratum basale of tubular pile body embedding has rubber coating, rubber: 50-60 parts of ethylene propylene diene monomer, 20-30 parts of silicone rubber, 25-30 parts of acrylic resin, 20-30 parts of trimethylbenzene, 10-20 parts of nano calcium carbonate, 10-20 parts of zinc oxide, 5-10 parts of mica powder, 3-4 parts of ethyl acetate, 1-2 parts of ammonium phosphate,

the muscle cage includes: a rectangular body with a plurality of square sections is formed by a plurality of longitudinal ribs and cross section ribs, the cross section ribs surround to form a square cross section, a section reinforcing rib is arranged between the middle points of the adjacent cross section ribs of the same square cross section, the diagonal line of the square cross section is provided with an extending rib, the extending rib is provided with an extending section extending out of the rib cage body, the length of the extending rib is the same as that of the diagonal line of the section of the rectangular pipe body of the prefabricated pipe pile,

the method comprises the following specific steps: digging a pile position pit and a side protection pier corresponding to the pipe pile on a basal layer, burying the pile position pit and the side protection pier into a groove required by the basal layer, placing a pile driver in place, lifting the precast pile to vertically align to the center of a pile position, slowly inserting the precast pile into the basal layer, then piling by using a drop hammer, wherein the maximum drop distance of the hammer is not more than 0.8 m, and stopping piling when the pile extends to a preset depth; after the bottom in groove is tamped, the side protection mound is put into in hoist and mount, later tamp the stratum basale, behind the first geotechnological cloth layer of stratum basale upper portion cover, lay the rubble bed course, cover second geotechnological cloth layer on the rubble bed course, later lay the solidification bed course that forms after premixing curing agent and filling, tamp the solidification bed course and maintain and make solidification bed course surface and tubular pile upper end and side protection mound upper end flush, pour concrete pavement basic unit in tubular pile and side protection mound and solidification bed course upper end, after the maintenance, at its surface coating interface bond line, lay the asphalt layer on interface bond line at last.

The side piers are concrete precast members.

The mass ratio of the curing agent to the filling is 0.3-0.55: 1.

The interface bonding layer is formed by coating the cured poured concrete pavement base layer with the interface bonding agent.

The interfacial adhesive comprises: 20-30 parts of sulphoaluminate mineral powder, 20-30 parts of polyacrylate emulsion, 10-20 parts of formaldehyde, 5-6 parts of urea, 10-15 parts of calcium oxide, 3-4 parts of hydroxypropyl methyl cellulose, 3-4 parts of naphthalene sulfonate formaldehyde condensate, 2-3 parts of butyl glycidyl ether, 1.5 parts of monopotassium phosphate, 1.5 parts of dioctyl phthalate and 50-60 parts of water,

the invention has the beneficial effects that: the pipe body of the pipe pile with the higher water content of the basal layer (soft soil) is embedded into the outer surface of the basal layer and coated with the rubber coating to separate the pipe body from contacting with the basal layer (soft soil), so that the durability of the pipe pile is improved. The soil solidified by the curing agent has the compressive strength of 17.5-18.7MPa in 7 days and 27.2-28.4MPa in 28 days, and the mechanical property of the soil can completely meet the requirement of roadbed construction. The mound part is protected to the side and is deepened in the stratum basale, and it is the rectangle to deepen the stratum basale middle part cross-section, and the part cross-section is right trapezoid more than the mound stratum basale is protected to the side for the road bed is more stable, makes the road bed not have the danger of side landslide, and the cross-section is the design of right trapezoid and makes it bear more pressure. The upper ends of the tubular piles and the side protecting piers are flush with the surface of the solidified fill layer to achieve more powerful support, and the road surface is effectively prevented from sinking. The rectangular pyramid portion of tubular pile can effectively increase pile efficiency, the rectangular pyramid surface has a plurality of horizontal tooth portions, horizontal tooth portion is formed by the first face of tooth portion and the first face contained angle of tooth portion, the first face of tooth portion is the level, tooth portion second face one end is connected with the outside end that is the first face of horizontally tooth portion and forms contained angle A, contained angle A angle is 50-60 degrees, this angle can make rectangular pyramid portion can more firmly prick in the stratum basale, this tooth portion can not influence pile efficiency, can make the pile body squeeze into the stratum basale smoothly. A plurality of vertical ribs and cross section ribs enclose a square cross section, a section reinforcing rib is arranged between the middle points of the adjacent cross section ribs of the same square cross section, so that the three-dimensional comprehensive strength of the reinforcement cage is increased, and the diagonal of the square cross section is provided with an extension rib, so that the reinforcement cage is combined with concrete more tightly and firmly. The interface bonding layer is arranged between the concrete layer and the asphalt to avoid the defects of transition, cracking and the like caused by insufficient bonding force and reasons when the concrete layer is directly contacted with the asphalt layer, and can uniformly transmit the stress generated by the travelling load, thereby effectively solving the stress concentration phenomenon generated at the joint, and leading the bonding strength to reach 0.54-0.58MPa by using the interface bonding agent.

Drawings

FIG. 1 is a schematic cross-sectional view of a subgrade;

FIG. 2 is a schematic view of the whole tubular pile;

FIG. 3 is a schematic cross-sectional view of a rectangular pyramid part in a tubular pile

FIG. 4 is a general schematic view of a tendon cage;

fig. 5 is a schematic top view of the tube pile.

Detailed Description

Example 1

As shown in fig. 1 to 5, a road-based structure includes: the concrete roadbed comprises a base layer 1 and a plurality of tubular piles 2 with lower parts vertically inserted into the base layer, wherein the upper parts of the tubular piles vertically extend out of the upper surface of the base layer, side protection piers 3 are arranged on two sides of the roadbed, the side protection piers partially extend into the base layer, the partial sections extending into the base layer are rectangular, the partial sections above the base layer of the side protection piers are in a right trapezoid shape, a roadbed side slope surface 4 is formed by outwards inclining sections of the right trapezoid, a first geotextile layer 5 is laid above the base layer, a gravel cushion layer 6 is arranged on the first geotextile layer, a second geotextile layer 7 is laid on the gravel cushion layer, a solidified filler layer 8 is arranged on the second geotextile layer, the upper ends of the tubular piles and the upper ends of the side protection piers are flush with the surface of the solidified filler layer, a concrete pavement base layer 22 is laid on the tubular piles, an interface bonding layer 23 is arranged on the concrete, the curing agent comprises the following components in parts by mass: 1 part of sodium silicate, 0.8-0.9 part of fly ash, 0.2-0.3 part of ammonium sulfate, 0.2-0.3 part of cement clinker, 0.1-0.15 part of fluorite, 0.08-0.09 part of oxalic acid, 0.06-0.07 part of polyacrylamide, 0.04-0.05 part of calcium phosphate, 0.04-0.05 part of triethanolamine, 0.02-0.03 part of calcium chloride and 0.8-1.2 parts of water,

the tubular pile 2 comprises a rectangular pipe body 10 and a four-pyramid part 11 at the lower end of the pipe body, the rectangular pipe body and the four-pyramid part at the lower end of the rectangular pipe body are integrally formed by concrete 21, a reinforcement cage 12 is arranged inside the rectangular pipe body, a plurality of transverse tooth parts 14 are arranged on the surface of the four-pyramid part 11, each transverse tooth part is formed by a tooth part first surface 15 and a tooth part second surface 16, each tooth part first surface is horizontal, one end of each tooth part second surface is connected with the outer side end of each horizontal tooth part first surface to form an included angle A, the included angle A is 50-60 degrees, the other end of each tooth part second surface extends downwards in an inclined mode and is connected with the inner side end of each adjacent tooth part first surface, the outer surface of the part, which is embedded into a basal layer, of the: 50-60 parts of ethylene propylene diene monomer, 20-30 parts of silicone rubber, 25-30 parts of acrylic resin, 20-30 parts of trimethylbenzene, 10-20 parts of nano calcium carbonate, 10-20 parts of zinc oxide, 5-10 parts of mica powder, 3-4 parts of ethyl acetate, 1-2 parts of ammonium phosphate,

the reinforcement cage 12 includes: a plurality of rectangular bodies with square sections are formed by a plurality of longitudinal ribs 17 and cross section ribs 18, the cross section ribs surround to form a square cross section, a section reinforcing rib 19 is arranged between the middle points of the adjacent cross section ribs of the same square cross section, an extension rib 20 is arranged on the diagonal line of the square cross section, the extension rib is provided with an extension section extending out of the rib cage body, the length of the extension rib is the same as that of the diagonal line of the section of the rectangular pipe body of the precast pipe pile,

example 2

A method of constructing a road bed, the road bed comprising: the upper part of the pipe pile vertically extends out of the upper surface of the basal layer, side protection piers are arranged at two sides of the roadbed, the side protection piers partially extend into the basal layer, the partial cross section extending into the basal layer is rectangular, the partial cross section above the basal layer of the side protection piers is in a right trapezoid shape, a roadbed side slope surface is formed by a right trapezoid inclined section facing outwards, a first geotextile layer is laid above the basal layer, a gravel cushion layer is arranged on the first geotextile layer, a second geotextile layer is laid on the gravel cushion layer, a solidified filler layer is arranged on the second geotextile layer, the upper end of the pipe pile and the upper end of the side protection pier are flush with the surface of the solidified filler layer, a concrete pavement base layer is laid at the upper ends of the pipe pile, the side protection pier and the solidified filler layer, an interface bonding layer is arranged on the concrete pavement base layer, a bitumen layer is arranged, the curing agent comprises the following components in parts by mass: 1 part of sodium silicate, 0.8 part of fly ash, 0.2 part of ammonium sulfate, 0.2 part of cement clinker, 0.1 part of fluorite, 0.08 part of oxalic acid, 0.06 part of polyacrylamide, 0.04 part of calcium phosphate, 0.04 part of triethanolamine, 0.02 part of calcium chloride and 0.8 part of water,

the tubular pile includes rectangular pipe body and the four-edge pyramis portion of body lower extreme, rectangular pipe body and the four-edge pyramis portion of rectangular pipe body lower extreme are concrete integrated into one piece, the inside muscle cage that is provided with of rectangular pipe body, the rectangular pyramid surface has a plurality of horizontal tooth portions, horizontal tooth portion is formed by the first face of tooth portion and the second face contained angle of tooth portion, the first face of tooth portion is the level, tooth portion second face one end is connected with the outside end that is the first face of horizontally tooth portion and forms contained angle A, contained angle A angle is 50-60 degrees, and tooth portion second face other end slope downwardly extending and adjacent tooth portion are the first face medial extremity of horizontally tooth portion and link to each other and form contained angle B, the partial surface coating in stratum basale of tubular pile body embedding has rubber coating, rubber: 50 parts of ethylene propylene diene monomer, 20 parts of silicone rubber, 25 parts of acrylic resin, 20 parts of trimethylbenzene, 10 parts of nano calcium carbonate, 10 parts of zinc oxide, 5 parts of mica powder, 3 parts of ethyl acetate, 1 part of ammonium phosphate,

the muscle cage includes: the rectangular body that has a plurality of square cross sections that a plurality of vertical ribs and cross section rib formed, the cross section rib encloses into square cross section, is provided with the cross-section strengthening rib between the adjacent cross section rib intermediate point of same square cross section, and square cross section diagonal is provided with extends the rib, extends the rib and has the extension section that stretches out outside the muscle cage body, and it is the same with prefabricated tubular pile rectangle body cross section diagonal length to extend rib length.

Example 3

A construction method of a road bed structure, the road bed structure comprising: the upper part of the pipe pile vertically extends out of the upper surface of the basal layer, side protection piers are arranged at two sides of the roadbed, the side protection piers partially extend into the basal layer, the partial cross section extending into the basal layer is rectangular, the partial cross section above the basal layer of the side protection piers is in a right trapezoid shape, a roadbed side slope surface is formed by a right trapezoid inclined section facing outwards, a first geotextile layer is laid above the basal layer, a gravel cushion layer is arranged on the first geotextile layer, a second geotextile layer is laid on the gravel cushion layer, a solidified filler layer is arranged on the second geotextile layer, the upper end of the pipe pile and the upper end of the side protection pier are flush with the surface of the solidified filler layer, a concrete pavement base layer is laid at the upper ends of the pipe pile, the side protection pier and the solidified filler layer, an interface bonding layer is arranged on the concrete pavement base layer, a bitumen layer is arranged, the curing agent comprises the following components in parts by mass: 1 part of sodium silicate, 0.9 part of fly ash, 0.3 part of ammonium sulfate, 0.3 part of cement clinker, 0.15 part of fluorite, 0.09 part of oxalic acid, 0.07 part of polyacrylamide, 0.05 part of calcium phosphate, 0.05 part of triethanolamine, 0.03 part of calcium chloride and 1.2 parts of water,

the tubular pile includes rectangular pipe body and the four-edge pyramis portion of body lower extreme, rectangular pipe body and the four-edge pyramis portion of rectangular pipe body lower extreme are concrete integrated into one piece, the inside muscle cage that is provided with of rectangular pipe body, the rectangular pyramid surface has a plurality of horizontal tooth portions, horizontal tooth portion is formed by the first face of tooth portion and the second face contained angle of tooth portion, the first face of tooth portion is the level, tooth portion second face one end is connected with the outside end that is the first face of horizontally tooth portion and forms contained angle A, contained angle A angle is 50-60 degrees, and tooth portion second face other end slope downwardly extending and adjacent tooth portion are the first face medial extremity of horizontally tooth portion and link to each other and form contained angle B, the partial surface coating in stratum basale of tubular pile body embedding has rubber coating, rubber: 55 parts of ethylene propylene diene monomer, 25 parts of silicone rubber, 27 parts of acrylic resin, 25 parts of trimethylbenzene, 15 parts of nano calcium carbonate, 15 parts of zinc oxide, 7 parts of mica powder, 3.5 parts of ethyl acetate, 1.5 parts of ammonium phosphate,

Example 4

A method of constructing a road bed, the road bed comprising: the upper part of the pipe pile vertically extends out of the upper surface of the basal layer, side protection piers are arranged at two sides of the roadbed, the side protection piers partially extend into the basal layer, the partial cross section extending into the basal layer is rectangular, the partial cross section above the basal layer of the side protection piers is in a right trapezoid shape, a roadbed side slope surface is formed by a right trapezoid inclined section facing outwards, a first geotextile layer is laid above the basal layer, a gravel cushion layer is arranged on the first geotextile layer, a second geotextile layer is laid on the gravel cushion layer, a solidified filler layer is arranged on the second geotextile layer, the upper end of the pipe pile and the upper end of the side protection pier are flush with the surface of the solidified filler layer, a concrete pavement base layer is laid at the upper ends of the pipe pile, the side protection pier and the solidified filler layer, an interface bonding layer is arranged on the concrete pavement base layer, a bitumen layer is arranged, the curing agent comprises the following components in parts by mass: 1 part of sodium silicate, 0.83 part of fly ash, 0.22 part of ammonium sulfate, 0.27 part of cement clinker, 0.11 part of fluorite, 0.088 part of oxalic acid, 0.062 part of polyacrylamide, 0.044 part of calcium phosphate, 0.048 part of triethanolamine, 0.022 part of calcium chloride and 0.9 part of water,

the tubular pile includes rectangular pipe body and the four-edge pyramis portion of body lower extreme, rectangular pipe body and the four-edge pyramis portion of rectangular pipe body lower extreme are concrete integrated into one piece, the inside muscle cage that is provided with of rectangular pipe body, the rectangular pyramid surface has a plurality of horizontal tooth portions, horizontal tooth portion is formed by the first face of tooth portion and the second face contained angle of tooth portion, the first face of tooth portion is the level, tooth portion second face one end is connected with the outside end that is the first face of horizontally tooth portion and forms contained angle A, contained angle A angle is 50-60 degrees, and tooth portion second face other end slope downwardly extending and adjacent tooth portion are the first face medial extremity of horizontally tooth portion and link to each other and form contained angle B, the partial surface coating in stratum basale of tubular pile body embedding has rubber coating, rubber: 52 parts of ethylene propylene diene monomer, 21 parts of silicone rubber, 26 parts of acrylic resin, 27 parts of trimethylbenzene, 16 parts of nano calcium carbonate, 18 parts of zinc oxide, 9 parts of mica powder, 3.3 parts of ethyl acetate, 1.1 parts of ammonium phosphate,

Example 5

A construction method of a road bed structure, the road bed structure comprising: the upper part of the pipe pile vertically extends out of the upper surface of the basal layer, side protection piers are arranged at two sides of the roadbed, the side protection piers partially extend into the basal layer, the partial cross section extending into the basal layer is rectangular, the partial cross section above the basal layer of the side protection piers is in a right trapezoid shape, a roadbed side slope surface is formed by a right trapezoid inclined section facing outwards, a first geotextile layer is laid above the basal layer, a gravel cushion layer is arranged on the first geotextile layer, a second geotextile layer is laid on the gravel cushion layer, a solidified filler layer is arranged on the second geotextile layer, the upper end of the pipe pile and the upper end of the side protection pier are flush with the surface of the solidified filler layer, a concrete pavement base layer is laid at the upper ends of the pipe pile, the side protection pier and the solidified filler layer, an interface bonding layer is arranged on the concrete pavement base layer, a bitumen layer is arranged, the curing agent comprises the following components in parts by mass: 1 part of sodium silicate, 0.85 part of fly ash, 0.25 part of ammonium sulfate, 0.23 part of cement clinker, 0.12 part of fluorite, 0.085 part of oxalic acid, 0.068 part of polyacrylamide, 0.047 part of calcium phosphate, 0.043 part of triethanolamine, 0.022 part of calcium chloride and 1 part of water,

the tubular pile includes rectangular pipe body and the four-edge pyramis portion of body lower extreme, rectangular pipe body and the four-edge pyramis portion of rectangular pipe body lower extreme are concrete integrated into one piece, the inside muscle cage that is provided with of rectangular pipe body, the rectangular pyramid surface has a plurality of horizontal tooth portions, horizontal tooth portion is formed by the first face of tooth portion and the second face contained angle of tooth portion, the first face of tooth portion is the level, tooth portion second face one end is connected with the outside end that is the first face of horizontally tooth portion and forms contained angle A, contained angle A angle is 50-60 degrees, and tooth portion second face other end slope downwardly extending and adjacent tooth portion are the first face medial extremity of horizontally tooth portion and link to each other and form contained angle B, the partial surface coating in stratum basale of tubular pile body embedding has rubber coating, rubber: 57 parts of ethylene propylene diene monomer, 28 parts of silicone rubber, 29 parts of acrylic resin, 28 parts of trimethylbenzene, 17 parts of nano calcium carbonate, 12 parts of zinc oxide, 6 parts of mica powder, 3.6 parts of ethyl acetate, 1.9 parts of ammonium phosphate,

Example 6

A construction method of a road bed structure, the road bed structure comprising: the upper part of the pipe pile vertically extends out of the upper surface of the basal layer, side protection piers are arranged at two sides of the roadbed, the side protection piers partially extend into the basal layer, the partial cross section extending into the basal layer is rectangular, the partial cross section above the basal layer of the side protection piers is in a right trapezoid shape, a roadbed side slope surface is formed by a right trapezoid inclined section facing outwards, a first geotextile layer is laid above the basal layer, a gravel cushion layer is arranged on the first geotextile layer, a second geotextile layer is laid on the gravel cushion layer, a solidified filler layer is arranged on the second geotextile layer, the upper end of the pipe pile and the upper end of the side protection pier are flush with the surface of the solidified filler layer, a concrete pavement base layer is laid at the upper ends of the pipe pile, the side protection pier and the solidified filler layer, an interface bonding layer is arranged on the concrete pavement base layer, a bitumen layer is arranged, the curing agent comprises the following components in parts by mass: 1 part of sodium silicate, 0.87 part of fly ash, 0.28 part of ammonium sulfate, 0.29 part of cement clinker, 0.14 part of fluorite, 0.088 part of oxalic acid, 0.067 part of polyacrylamide, 0.043 part of calcium phosphate, 0.044 part of triethanolamine, 0.022 part of calcium chloride and 1.1 part of water,

the tubular pile includes rectangular pipe body and the four-edge pyramis portion of body lower extreme, rectangular pipe body and the four-edge pyramis portion of rectangular pipe body lower extreme are concrete integrated into one piece, the inside muscle cage that is provided with of rectangular pipe body, the rectangular pyramid surface has a plurality of horizontal tooth portions, horizontal tooth portion is formed by the first face of tooth portion and the second face contained angle of tooth portion, the first face of tooth portion is the level, tooth portion second face one end is connected with the outside end that is the first face of horizontally tooth portion and forms contained angle A, contained angle A angle is 50-60 degrees, and tooth portion second face other end slope downwardly extending and adjacent tooth portion are the first face medial extremity of horizontally tooth portion and link to each other and form contained angle B, the partial surface coating in stratum basale of tubular pile body embedding has rubber coating, rubber: 53 parts of ethylene propylene diene monomer, 25 parts of silicone rubber, 28 parts of acrylic resin, 25 parts of trimethylbenzene, 15 parts of nano calcium carbonate, 17 parts of zinc oxide, 8 parts of mica powder, 3.7 parts of ethyl acetate, 1.4 parts of ammonium phosphate,

Claims

1. A construction method of a road bed structure, the road bed structure comprising: the upper part of the precast tubular pile vertically extends out of the upper surface of the basal layer, side protection piers are arranged on two sides of the roadbed, the side protection piers partially extend into the basal layer, the partial cross section extending into the basal layer is rectangular, the partial cross section above the basal layer of the side protection piers is in a right trapezoid shape, a roadbed side slope surface is formed by a right trapezoid inclined section facing outwards, a first geotextile layer is laid above the basal layer, a gravel cushion layer is arranged on the first geotextile layer, a second geotextile layer is laid on the gravel cushion layer, a solidified filling layer is arranged on the second geotextile layer, the upper end of the precast tubular pile and the upper end of the side protection pier are flush with the surface of the solidified filling layer, a concrete pavement base layer is laid on the precast tubular pile and the side protection pier and the upper end of the solidified filling layer, an interface bonding layer is arranged on the concrete pavement base layer, a asphalt layer is arranged on, the curing agent comprises the following components in parts by mass: 1 part of sodium silicate, 0.8-0.9 part of fly ash, 0.2-0.3 part of ammonium sulfate, 0.2-0.3 part of cement clinker, 0.1-0.15 part of fluorite, 0.08-0.09 part of oxalic acid, 0.06-0.07 part of polyacrylamide, 0.04-0.05 part of calcium phosphate, 0.04-0.05 part of triethanolamine, 0.02-0.03 part of calcium chloride and 0.8-1.2 parts of water,

prefabricated tubular pile includes the four-edge pyramis portion of rectangle body and body lower extreme, the four-edge pyramis portion of rectangle body and rectangle body lower extreme is concrete integrated into one piece, the inside muscle cage that is provided with of rectangle body, the rectangular pyramid surface has a plurality of horizontal tooth portions, horizontal tooth portion is formed by the first face of tooth portion and the second face contained angle of tooth portion, the first face of tooth portion is the level, tooth portion second face one end is connected with the outside end that is the first face of horizontally tooth portion and forms contained angle A, contained angle A angle is 50-60 degrees, and tooth portion second face other end slope downwardly extending links to each other with adjacent tooth portion and forms contained angle B with the first face medial extremity of horizontally tooth portion, the partial surface coating of stratum basale has rubber coating in prefabricated tubular pile body embedding, rubber coating is formed by rubber coating: 50-60 parts of ethylene propylene diene monomer, 20-30 parts of silicone rubber, 25-30 parts of acrylic resin, 20-30 parts of trimethylbenzene, 10-20 parts of nano calcium carbonate, 10-20 parts of zinc oxide, 5-10 parts of mica powder, 3-4 parts of ethyl acetate, 1-2 parts of ammonium phosphate,

the method comprises the following specific steps: digging a pile position pit and a side protection pier corresponding to the precast tubular pile in a base layer to be buried into a groove required by the base layer, placing a pile driver in place to lift the precast tubular pile to vertically align to the center of a pile position, slowly inserting the precast tubular pile into the base layer, then driving the pile by using a drop hammer, wherein the maximum drop distance of the hammer is not more than 0.8 m, and stopping driving the pile when the pile extends to a preset depth; after the bottom of groove is tamped, the side protection mound is put into in hoist and mount, later tamp the stratum basale, behind the first geotechnological cloth layer of stratum basale upper portion cover, lay the rubble bed course, cover second geotechnological cloth layer on the rubble bed course, later lay the solidification bed course that forms after premixing curing agent and filling, tamp the solidification bed course and maintain and make solidification bed course surface and precast tubular pile upper end and side protection mound upper end flush, pour concrete road surface basic unit at tubular pile and side protection mound and solidification bed course upper end, after the maintenance, coat the interface bond line on its surface, lay the asphalt layer on the interface bond line at last.

2. A method of constructing a road substructure as claimed in claim 1, wherein the side piers are precast concrete members.