CN217052898U - Construction access road structure on mud flat zone - Google Patents

Construction access road structure on mud flat zone Download PDF

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Publication number
CN217052898U
CN217052898U CN202121331020.9U CN202121331020U CN217052898U CN 217052898 U CN217052898 U CN 217052898U CN 202121331020 U CN202121331020 U CN 202121331020U CN 217052898 U CN217052898 U CN 217052898U
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roadbed
construction
box
soil
access road
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来佳雯
陈兴艾
曹连聪
杨文峰
黎文武
应凯
苏效友
霍永生
吕永
印仁浩
俞佳伟
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Ningbo Communication Engineering Construction Group Co Ltd
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Ningbo Communication Engineering Construction Group Co Ltd
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Abstract

The utility model discloses a construction pavement structure on mud flat area, include emulsified asphalt seal, metalling, sand bed course, the geogrid and the multisection roadbed case of clamp in the sand bed course that lay in proper order on the solidified soil of mud flat silt area weak soil foundation, this multisection roadbed case vertically lays along the construction pavement, adopts a plurality of unsmooth draw-in groove interconnect between every two adjacent sections roadbed case's end is horizontal to form continuous construction pavement. This structure has following advantage: firstly, the cost is low, and the protection of marine ecological environment is facilitated; secondly, the top surface of the solidified soil is sealed by wheel-sticking-free emulsified asphalt, so that the waterproof effect is achieved, the damage of a bonding layer during construction is reduced, the bonding force with the solidified soil is improved, and the capability and durability of preventing seawater from penetrating and corroding the steel roadbed box are obviously improved; thirdly, the provided calculation method is clear in principle, practical and feasible, improves the safety quality performance of engineering, and brings higher economic benefit and social benefit.

Description

Construction access road structure on mud flat zone
Technical Field
The utility model relates to a construction access road structure specifically indicates a construction access road structure on mud flat area.
Background
When a road and a bridge are built on the coastal region, a construction access road is often required to be built on a mud flat and muddy zone. Because the soil body in the mud flat silt zone has large water content, high compressibility and low bearing capacity, the traditional construction access road construction method fills thick sandstone fillers and hardens concrete, which not only has large material demand and heavy weight, causes larger load due to the substrate and has high cost, but also is not beneficial to the protection of marine ecological environment. In recent years, a reusable steel roadbed box is paved on a simple roadbed solidified with a soil body in a mud flat and muddy zone to serve as a construction access road, but due to the fact that the passing vehicle carrying capacity of the construction access road is large, the simple roadbed at the bottom of the roadbed box is often partially emptied under the action of heavy vehicle load and additional vibration force, the bearing capacity of the roadbed box is reduced, and meanwhile damage of the simple roadbed is aggravated, so that a new roadbed box needs to be replaced, and the construction access road needs to be repaired again.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome prior art's defect and provide a simple structure, safe and reliable, construction convenience, maintain the mud flat silt belt of science, low carbon environmental protection and construct the pavement structure.
The technical problem of the utility model is realized through following technical scheme:
the utility model provides a construction pavement structure on mud flat area, includes the soft soil foundation in mud flat silt area and the solidified soil on the soft soil foundation, the solidified soil on in proper order the successive layer spread emulsified asphalt seal, metalling, sand cushion, press from both sides geogrid and the multisection road bed case in the sand cushion, this multisection road bed case is vertically laid along the construction pavement, adopts a plurality of unsmooth draw-in groove interconnect between every two adjacent road bed case's end is horizontal to form continuous construction pavement.
The roadbed box is a rectangular steel box body formed by welding a top plate, longitudinal beams, cross beams and a bottom plate, each section is 5m in length, 4m in width and 20 cm-30 cm in thickness, the longitudinal beams and the cross beams are I-shaped steel beams, the top plate and the bottom plate are steel plates with the thickness of 10 mm-15 mm, and V-shaped anti-slip strips are welded on the surface of the top plate; the size of the whole roadbed box and the size of the parts are determined according to the width of a construction access, the load to be borne and the bearing capacity of a soft soil foundation.
Holes are reserved in the four corners of the roadbed box, and bolts are driven in after the paving is finished to serve as positioning parts.
The two ends of each section of roadbed box are transversely provided with a plurality of convex clamping grooves and a plurality of concave clamping grooves respectively, the convex clamping grooves and the concave clamping grooves corresponding to every two adjacent sections of roadbed boxes are mutually butted and embedded during splicing, and then are fixed by bolts.
The solidified soil is foundation soil with integrity, water stability and certain strength, and the 7d unconfined compressive strength of the solidified soil is not less than 3 MPa.
The emulsified asphalt seal layer is formed by spraying emulsified asphalt which does not adhere to a wheel on the top surface of solidified soil.
The gravel layer is a main bearing structure of the simple roadbed of the construction pavement, and consists of graded gravel with the gravel particle size smaller than 4cm, the mud content is smaller than 3%, the thickness is 50 cm-100 cm, and the compactness is not smaller than 80%; the sand cushion layer is medium coarse sand, the mud content is less than 3%, and the thickness is 3 cm-5 cm.
The geogrid is a steel-plastic geogrid.
Compared with the prior art, the utility model provides a construction access road structure on mud flat area, its structure is the emulsified asphalt seal that lays in proper order on the solidified soil of mud flat silt area weak soil foundation, the metalling, the sand cushion layer, insert geogrid and the multisection roadbed case in the sand cushion layer, this multisection roadbed case vertically lays along the construction access road, adopt a plurality of unsmooth draw-in groove interconnect between the end of every two adjacent roadbed cases is horizontal to form continuous construction access road surface. The construction access road structure has the following advantages: firstly, the traditional construction access way construction method for overcoming the defects of building sandstone fillers and hardening concrete on coastal beach zones is arranged, so that the construction cost is low, and the protection of marine ecological environment is facilitated; secondly, the top surface of the solidified soil is sealed by wheel-sticking-free emulsified asphalt, so that the waterproof effect is achieved, the damage of a bonding layer during construction is reduced, the bonding force with the solidified soil is improved, and the capability and durability of preventing seawater from penetrating and corroding the steel roadbed box are obviously improved; thirdly, the provided calculation method is clear in principle, practical and easy to implement, and can be used as technical guidance for construction, use and maintenance of a roadbed box construction access road on a beach zone through monitoring and control of a geological radar, and the safety quality performance of engineering is improved. Therefore, the utility model discloses a construction pavement structure on mud flat area has advantages such as simple structure, safe and reliable, construction convenience, maintenance science, low carbon environmental protection, and it combines corresponding construction method, can bring higher economic benefits and social.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of the present invention.
Fig. 2 is a schematic structural diagram of a roadbed box.
Fig. 3 is a force calculation chart of a local void at the bottom of a roadbed box.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings.
As shown in fig. 1 to 3, 1 is a soft soil foundation, 2 is solidified soil, 3 is an emulsified asphalt seal, 4 is a gravel layer, 5 is a sand cushion layer, 6 is a geogrid, 7 is a roadbed box, 71 is a longitudinal beam, 72 is a cross beam, 73 is a top plate, 74 is a bottom plate, 75 is a bolt, 76 is a convex clamping groove, 77 is a concave clamping groove, and 8 is partially hollow.
The utility model provides a construction access road structure on mud flat area, includes soft soil foundation 1 in mud flat silt area and the solidified soil 2 on the soft soil foundation, has laid emulsified asphalt seal 3, metalling 4, sand cushion 5, geogrid 6 and the multisection road bed case 7 of clamp in the sand cushion layer on this solidified soil layer by layer in proper order on the layer, and multisection road bed case is vertically laid along the construction access road, adopts a plurality of unsmooth draw-in groove interconnect between every two adjacent road bed case 7 ends is horizontal to form continuous construction access road surface.
The soft soil foundation 1 is soft soil in a mud flat silt zone, and has the characteristics of large soil body water content, high compressibility, low bearing capacity and the like, the solidified soil 2 is foundation soil with integrity, water stability and certain strength, and the 7d unconfined compressive strength of the solidified soil 2 is not less than 3 MPa.
The emulsified asphalt seal layer 3 is a seal layer formed by spraying emulsified asphalt on the top surface of the solidified soil 2 without sticking a wheel, plays a role in water prevention, and prevents seawater from permeating to corrode the steel roadbed box. The emulsified asphalt without the sticking wheel has high curing speed and demulsification speed, and can be demulsified within 10min, so that the construction efficiency can be obviously improved; the wheel is not easy to take away by construction vehicles in the construction process, the spreading effect of the emulsified asphalt of the wheel is improved, the damage of a bonding layer in the construction period is reduced, the bonding force with solidified soil is improved, and the capability of preventing seawater permeation and the durability are obviously improved.
The gravel layer 4 is a main bearing structure of the simple roadbed of the construction pavement, consists of graded gravel with the gravel particle size smaller than 4cm, has the mud content smaller than 3%, the thickness of 50 cm-100 cm and the compactness of not smaller than 80%.
The sand cushion 5 is medium coarse sand, the mud content is less than 3%, and the thickness is 3 cm-5 cm.
The geogrid 6 is a steel-plastic geogrid.
The roadbed box 7 is a steel rectangular box body and is formed by welding a top plate 73, a longitudinal beam 71, a cross beam 72 and a bottom plate 74, and is customized by a professional manufacturer, each section of the general specification is 5m in length, 4m in width and 20-30 cm in thickness, the longitudinal beam 71 and the cross beam 72 are made of I-shaped steel, the top plate 73 and the bottom plate 74 are made of steel plates and 10-15 mm in thickness, and V-shaped anti-slip strips are additionally welded on the surface of the top plate 73 to prevent vehicle tires from slipping; the whole body and the size of the parts of the roadbed box 7 are determined according to the width of a construction access, the load required to be born and the bearing capacity of a soft soil foundation.
Holes are reserved at four corners of the roadbed box 7, and steel bolts 75 are driven into the roadbed box after the paving is finished to serve as positioning parts.
Each section of the road foundation box 7 is provided with a clamping groove type joint, the end heads of the two ends of each section of the road foundation box 7 are transversely provided with a plurality of convex clamping grooves 76 and a plurality of concave clamping grooves 77 respectively, the convex clamping grooves 76 and the concave clamping grooves 77 corresponding to every two adjacent sections of the road foundation boxes 7 are mutually butted and embedded during splicing, and then are fixed by bolts, so that the road foundation boxes 7 can be effectively prevented from being staggered or separated from each other.
The local void 8 means that the simple roadbed at the bottom of the roadbed box 7 sinks unevenly under the action of heavy load of a vehicle and additional vibration force to cause the local void 8 of the roadbed box, so that the bearing capacity of the roadbed box is reduced, and meanwhile, the damage of the simple roadbed is aggravated, so that a new roadbed box needs to be replaced and a construction access road needs to be repaired again.
The utility model discloses a roadbed box 7 produces roadbed box bottom local void under the vehicle load effect, and arbitrary three section roadbed boxes that vertically lay along the construction pavement analyze the simple roadbed at the roadbed box bottom void situation, middle one section roadbed box receives the vehicle load effect, the vehicle load translates into the equipartition load q including vibration and impact force, the simple roadbed in the span 2a range that roadbed box 7 receives the maximum force is uneven to subside and make roadbed box bottom local void, regard roadbed box as the elasticity foundation beam, because roadbed box bending rigidity is great, geogrid 6 does not participate in the atress calculation and only plays the effect of dispersing roadbed box pressure, according to the elasticity foundation beam theory, assume that the other two sections roadbed box end point C from middle one section roadbed box far end is free end non-shearing force and bending moment, middle one section roadbed box is articulated with the B end that its adjacent roadbed box end is connected with a plurality of horizontal unsmooth draw-in groove, through the shear force transmission vehicle load, the articulated department two way base case vertical displacement of the horizontal a plurality of unsmooth draw-in groove B end in end of adjacent road base case is the same, and the three section road base case as elasticity ground beam receives vertical displacement, corner, moment of flexure and shear force computational formula under the vehicle load effect as follows:
a formula I,
Figure 67333DEST_PATH_IMAGE001
The solution is as follows:
Figure 718895DEST_PATH_IMAGE002
the formula II,
And an AB section:
Figure 813146DEST_PATH_IMAGE003
the solution is as follows:
Figure DEST_PATH_IMAGE004
the formula III,
And a BC section:
Figure 818142DEST_PATH_IMAGE005
Figure 491569DEST_PATH_IMAGE006
the formula IV,
The boundary condition and the continuity condition of the three-link base box 7 are
(1) And point O:
Figure DEST_PATH_IMAGE007
(2) and (B) point A:
Figure 422354DEST_PATH_IMAGE008
(3) and B, point:
Figure 502436DEST_PATH_IMAGE009
(4) and C, point:
Figure 435757DEST_PATH_IMAGE010
according to the boundary conditions and continuous conditions of the three-link basic box 7, the coefficients to be determined can be respectively solved by a formula I, a formula II and a formula III
Figure 166953DEST_PATH_IMAGE011
To obtain
Figure DEST_PATH_IMAGE012
If three roadbed boxes 7 are all acted by vehicle load, calculating by using an overlay method, determining the local void 8 range 2a of the roadbed bottom by a geological radar, calculating the stress condition of the roadbed boxes by the method, if the stress of the roadbed boxes reaches a critical state, removing the roadbed boxes, repairing the void roadbed, laying the roadbed boxes again, and if the difference between the calculation result and the measured data is too large, taking five roadbed boxes to calculate according to the method;
the symbols in formula one, formula two and formula three are defined as:
Figure 265709DEST_PATH_IMAGE013
-a uniform load of the vehicle load comprising vibration and impact forces, of value
Figure DEST_PATH_IMAGE014
,
Figure 426563DEST_PATH_IMAGE015
；
Figure 475159DEST_PATH_IMAGE016
The foundation reaction force coefficient is determined or checked by experiments according to relevant specifications,
Figure 732965DEST_PATH_IMAGE017
；
Figure 225127DEST_PATH_IMAGE018
characteristic coefficients, comprehensive parameters related to the elastic properties of the roadbed box 7 and the foundation, reflecting the relative stiffness of the foundation and the foundation beam;
Figure 14222DEST_PATH_IMAGE019
the middle part of the roadbed bottom is half of the local void length,
Figure 351663DEST_PATH_IMAGE020
；
Figure 309648DEST_PATH_IMAGE021
the average moment of inertia of the cross section of the roadbed box 7,
Figure 503869DEST_PATH_IMAGE022
；
Figure 45840DEST_PATH_IMAGE023
the modulus of elasticity of the material of the roadbed box 7,
Figure 186971DEST_PATH_IMAGE017
；
Figure 730954DEST_PATH_IMAGE024
-a coefficient to be determined;
Figure 237021DEST_PATH_IMAGE025
respectively are
Figure 984397DEST_PATH_IMAGE026
The maximum bending moment and the maximum shear of the segment,
Figure 679952DEST_PATH_IMAGE027
；
Figure DEST_PATH_IMAGE028
respectively are
Figure 200145DEST_PATH_IMAGE029
The counter-force of the foundation of the section,
Figure 939431DEST_PATH_IMAGE015
；
Figure 111787DEST_PATH_IMAGE030
respectively, by the center of the 8 position of the local void at the bottom of the middle roadbed box
Figure 345453DEST_PATH_IMAGE031
Roadbed box with point as original point
Figure 614760DEST_PATH_IMAGE032
Roadbed box with vertical section deformation curve equation and starting point A of non-void-free section as original point
Figure 39794DEST_PATH_IMAGE033
Roadbed box with vertical section deformation curve equation and point B as original point
Figure 824080DEST_PATH_IMAGE034
An equation of a vertical deformation curve of the segment,
Figure 861437DEST_PATH_IMAGE020
；
Figure 719671DEST_PATH_IMAGE035
respectively are at
Figure 738443DEST_PATH_IMAGE031
A point,
Figure 465484DEST_PATH_IMAGE036
A point,
Figure 290220DEST_PATH_IMAGE037
The point is a longitudinal horizontal coordinate value of the origin,
Figure 81590DEST_PATH_IMAGE020
；
Figure 333580DEST_PATH_IMAGE038
-are roadbed boxes respectively
Figure 279408DEST_PATH_IMAGE032
A segment,
Figure 907835DEST_PATH_IMAGE033
A segment,
Figure 943925DEST_PATH_IMAGE034
The corner of any cross section of the section,
Figure 117548DEST_PATH_IMAGE039
；
Figure 301405DEST_PATH_IMAGE040
are respectively roadbed boxes
Figure 3299DEST_PATH_IMAGE032
A section,
Figure 752949DEST_PATH_IMAGE033
A segment,
Figure 363053DEST_PATH_IMAGE034
Any section bending moment of the section is obtained,
Figure 768626DEST_PATH_IMAGE041
；
Figure 253703DEST_PATH_IMAGE042
-are roadbed boxes respectively
Figure 998805DEST_PATH_IMAGE032
A section,
Figure 29078DEST_PATH_IMAGE033
A section,
Figure 672680DEST_PATH_IMAGE034
The maximum bending moment of the section is obtained,
Figure 446601DEST_PATH_IMAGE041
；
Figure 423041DEST_PATH_IMAGE043
-separate roadbed box
Figure 624215DEST_PATH_IMAGE032
A section,
Figure 755113DEST_PATH_IMAGE033
A segment,
Figure 739250DEST_PATH_IMAGE034
The shearing force of any section of each section,
Figure 786840DEST_PATH_IMAGE044
；
Figure 142604DEST_PATH_IMAGE045
-are roadbed boxes respectively
Figure 72383DEST_PATH_IMAGE032
A section,
Figure 938839DEST_PATH_IMAGE033
A section,
Figure 575356DEST_PATH_IMAGE034
The maximum shearing force of the section is high,
Figure 364671DEST_PATH_IMAGE044
；
Figure 719429DEST_PATH_IMAGE046
the connecting shearing force of a plurality of transverse concave-convex clamping grooves between one end of the middle section of the road foundation box 7 and the adjacent section of the road foundation box,
Figure 310947DEST_PATH_IMAGE044
；
Figure 552704DEST_PATH_IMAGE047
the permissible bending moment of the roadbed box 7,
Figure 266582DEST_PATH_IMAGE041
；
Figure 420221DEST_PATH_IMAGE048
the allowable shear force of the roadbed box 7,
Figure 877747DEST_PATH_IMAGE044
。
meanwhile, the construction method for constructing the pavement structure on the mud flat and silt zone mainly comprises the following steps:
step one, planning a construction access road structure scheme on a mud flat silt zone
Figure 974010DEST_PATH_IMAGE049
According to construction load born by a construction access, geological drilling information and a design drawing, the model selection of the roadbed box, the thickness and the technical indexes of the geogrid 6, the sand cushion layer 5, the gravel layer 4, the emulsified asphalt seal layer 3 and the solidified soil 2 are drawn up;
secondly, calculating the maximum void length 2a of the bottom of the roadbed box and corresponding deformation and internal force through a formula I to a formula III;
step two, solidified soil construction
Removing impurities and the like on the surface of a treatment area, which influence the sinking and stirring of the solidified soil during construction;
secondly, backfilling and leveling the soft soil according to the designed top elevation of the solidified soil 2, performing field trial stirring before construction, if the stirring head is difficult to stir and sink the soil layer, firstly performing integral or local digging on the part of the soil layer, and performing solidification construction after digging and roughly leveling;
thirdly, setting out the construction area, dividing the construction area into blocks, and dividing the blocks into processing areas with the size of 5m multiplied by 5m or 5m multiplied by 6 m;
fourthly, the usage amount of the curing agent is calculated according to the soft soil engineering quantity of the treatment section, the automatic quantitative feeding system of the curing agent is adopted to set the spraying speed of the curing agent, the curing agent adding control system is installed in the background feeding system, the adding amount of the curing agent is controlled in real time, the precise metering is realized, the material waste is reduced, and the usage amount process of the curing agent is recorded and stored in real time to form a report;
Figure 124369DEST_PATH_IMAGE050
the stirring equipment is directly inserted to stir the in-situ soil;
Figure 125823DEST_PATH_IMAGE051
the stirring equipment is operated forward to gradually and deeply stir and spray the curing agent until the curing design bottom is reached;
Figure 639237DEST_PATH_IMAGE052
the stirring equipment runs reversely, slowly lifts, stirs and sprays the curing agent, the speed of stirring lifting or descending is controlled to be 10-20 s/m, the material spraying speed of the curing agent is controlled to be 80-150 kg/min, the specific speed is correspondingly adjusted according to the actual operation condition on site, and the requirement of uniform spraying and stirring in the construction process is met;
Figure 839274DEST_PATH_IMAGE053
after solidification construction is finished, leveling a construction area, beating and compacting the surface by adopting machinery such as an excavator and the like to ensure the integrity of the plate body and the compactness of a surface soil body, and preserving the solidified soil for more than 7d, and naturally preserving; if the ground is rainy, a plastic film is laid on the surface of the curing field, and meanwhile, the drainage of the field is enhanced, and the influence of rainwater is reduced;
step three, emulsified asphalt seal, gravel layer, sand cushion and geogrid construction
Removing floating soil and sundries on the base surface of the solidified soil 2, laying out the center line and side lines of a leveling layer, arranging indication piles at the edges of road shoulders at two sides, measuring and paying off, and measuring the elevation by using a level gauge;
secondly, spraying a wheel-sticking-free emulsified asphalt seal layer 3 on the top surface of the solidified soil, wherein the spraying amount of the wheel-sticking-free emulsified asphalt is converted into pure asphalt with the use amount of 0.35kg/m 2-0.45 kg/m2, and the seal layer is uniformly sprayed;
thirdly, uniformly paving the broken stone on the non-stick wheel emulsified asphalt seal layer with a preset width, wherein each layer is 20-30 cm, and compacting the layers by using a light road roller;
paving the sand cushion layer 5 twice, wherein the first layer is 1 cm-2 cm, paving and flattening the geogrid 6 on the first layer of sand cushion layer, fixing corners by soil nails, overlapping the geogrid joints, and overlapping the geogrid joints by 50 cm-100 cm;
paving a second sand cushion layer 1-2 cm on the geogrid 6, and flattening by using a light road roller under static pressure;
step four, hoisting the roadbed box
Figure 708004DEST_PATH_IMAGE049
Paving a first section of the road base box which is qualified by inspection along the longitudinal direction of the construction access by using a crane, drilling steel bolts 75 in reserved holes at four corners of the road base box 7, and fastening the tops of the bolts and a top plate of the road base box by using fasteners to require accurate positioning;
Figure DEST_PATH_IMAGE054
hoisting a second section of the foundation box by using a crane, butting and embedding a plurality of convex clamping grooves 76 at one end of the second section of the foundation box and a plurality of concave clamping grooves 77 corresponding to one end of the laid first section of the foundation box, and fixing by using bolts;
splicing all the longitudinal roadbed boxes in the sequence, and if the construction sidewalk is a double-width construction sidewalk, laying the roadbed boxes on the other side in the sequence;
setting horizontal displacement and settlement observation points at appropriate positions of the paved roadbed boxes 7, and carrying out first observation and recording;
detecting the contact condition of the paved roadbed box and a sand cushion layer by using a geological radar as comparison data in a use stage;
step five, use and maintenance
Figure 39497DEST_PATH_IMAGE049
After the construction of the roadbed box construction underpass is finished, regularly using a total station and a geological radar to detect the horizontal displacement, vertical settlement and the condition of the roadbed box bottom void, mastering the use dynamic state of the roadbed box construction underpass, judging whether the roadbed box bottom has void data or not, and using the total station and the geological radar to detect in time if the roadbed box sways and beats;
Figure 838826DEST_PATH_IMAGE054
and if the disengaging range of the roadbed box reaches a critical value, the roadbed box is removed, repaired and disengaged, and then the roadbed box is paved again and recovered for use.
The above description is only a specific embodiment of the present invention, and those skilled in the art should understand that any similar structural design to this embodiment should be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides a construction pavement structure on mud flat area, soft soil foundation (1) and the solidified soil (2) on the soft soil foundation in mud flat silt area, its characterized in that solidified soil on in proper order the successive layer spread have emulsified asphalt seal (3), metalling (4), sand bed course (5), clamp geogrid (6) and multisection roadbed case (7) in the sand bed course, this multisection roadbed case is vertically laid along the construction pavement, adopt a plurality of unsmooth draw-in groove interconnect between the end of every two adjacent sections roadbed case (7) is horizontal to form continuous construction pavement.
2. The construction access road structure on the beach zone as claimed in claim 1, characterized in that the roadbed box (7) is a rectangular steel box body formed by welding a top plate (73), a longitudinal beam (71), a cross beam (72) and a bottom plate (74), each section is 5m long, 4m wide and 20cm to 30cm thick, the longitudinal beam (71) and the cross beam (72) are I-shaped steel beams, the top plate (73) and the bottom plate (74) are steel plates with 10mm to 15mm thick, and V-shaped anti-skid strips are welded on the surface of the top plate (73); the whole body and the size of the components of the roadbed box (7) are determined according to the width of a construction access road, the load to be born and the bearing capacity of a soft soil foundation.
3. The construction access road structure on the beach zone as claimed in claim 1, characterized in that holes are reserved at four corners of the roadbed box (7), and bolts (75) are driven in as positioning components after the pavement is finished.
4. The construction access road structure on the beach zone as claimed in claim 1, wherein the ends of the two ends of each section of the roadbed box (7) are respectively provided with a plurality of convex clamping grooves (76) and a plurality of concave clamping grooves (77) in the transverse direction, and the convex clamping grooves (76) and the concave clamping grooves (77) corresponding to each two adjacent sections of the roadbed box (7) are mutually butted and embedded during splicing and then fixed by bolts.
5. The construction access road structure on the beach zone as claimed in claim 1, characterized in that the solidified soil (2) is a foundation soil which is hardened into a whole, water-stable and certain strength by using a series of physical and chemical reactions generated between the curing agent and the soft soil, and the 7d unconfined compressive strength of the solidified soil (2) is not less than 3 MPa.
6. The construction pavement structure on the beach zone according to claim 1, characterized in that the emulsified asphalt seal (3) is a seal formed by spraying emulsified asphalt on the top surface of solidified soil without sticking a wheel.
7. The construction pavement structure on the beach zone according to claim 1, characterized in that the gravel layer (4) is the main bearing structure of the simple roadbed of the construction pavement, and consists of graded gravel with the gravel grain diameter less than 4cm, the mud content is less than 3%, the thickness is 50 cm-100 cm, and the compactness is not less than 80%; the sand cushion layer (5) is medium coarse sand, the mud content is less than 3%, and the thickness is 3 cm-5 cm.
8. The construction pavement structure on the beach zone according to claim 1, characterized in that the geogrids (6) are steel-plastic geogrids.
CN202121331020.9U 2021-06-16 2021-06-16 Construction access road structure on mud flat zone Active CN217052898U (en)

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Application Number Priority Date Filing Date Title
CN202121331020.9U CN217052898U (en) 2021-06-16 2021-06-16 Construction access road structure on mud flat zone

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Publication Number Publication Date
CN217052898U true CN217052898U (en) 2022-07-26

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