CN110230242A - A kind of road surface base layer construction method thereof - Google Patents

Abstract

The invention discloses a kind of road surface base layer construction method thereofs, are related to constructing tunnel field, mainly solve the problems, such as that the construction of the area Sui Zhi is difficult, steps are as follows: S1, surveying and locating；S2, template is installed；S3, concrete mixing and stirring and transport；S4, tunnel base concrete placings；Respectively include that concrete paves, concrete vibrates；S5, concrete plucking；Surface layer is subjected to hair pulling treatment using plucking brush, plucking carries out immediately after cement concrete initial set, should not too early also should not too late, ineffective too early, then concrete hardening can not plucking too late；S6, form removable；Demoulding concrete easy to damage too early, it is too late, it influences template and is used in turn；S7, concrete curing, joint-cutting；The present invention efficiently solves the power signs such as small scrunch, mylonite, Schistosity zone and mirror surface scratch and mutually mixes, and the difficult problem of the area the Sui Zhi construction of section steep dip prevents construction from sending unexpected, highly-safe, is also beneficial to environmental protection.

Description

A kind of road surface base layer construction method thereof

Technical field

The present invention relates to constructing tunnel field, specifically a kind of road surface base layer construction method thereof.

Background technique

Constructing tunnel is the abbreviation of new Austrian method for tunnel construction, it is that Austrian scholar applies in long campaigns tunnel In work practice, a kind of reasonable construction method proposed from the viewpoint of rock mechanics is using spray anchor technology, monitoring It measures etc. and the new engineering construction method of one kind formed with a system that rock mechanics theory is constituted；

Tunnel area is with a varied topography varied, and part Close Tunnel stratum has geochemistry of Yanshanian granitoids, middle coarse grained texture, block The features such as columnar structure, joint fissure are relatively developed, the power signs such as small scrunch, mylonite, Schistosity zone and mirror surface scratch are mutual Mix, section steep dip, overburden layer is distributed in massif top, and topography is relatively high, lacks strong richness and deposits condition；Bedrock fracture The main preservation of water is in developmental joint fissure band, and rock crushing has connectivity, and hydraulic connection is close；Which results in constructions Difficulty is easy to produce dangerous problem.

Summary of the invention

The purpose of the present invention is to provide a kind of road surface base layer construction method thereofs, to solve mentioned above in the background art ask Topic.

To achieve the above object, the invention provides the following technical scheme:

A kind of road surface base layer construction method thereof, steps are as follows:

S1, surveying and locating；

S2, template is installed；

S3, concrete mixing and stirring and transport；

S4, tunnel base concrete placings；Respectively include that concrete paves, concrete vibrates；

S5, concrete plucking；Surface layer is subjected to hair pulling treatment using plucking brush, plucking after cement concrete initial set immediately Carry out, should not too early also should not too late, too early it is ineffective, then concrete hardening can not plucking too late；

S6, form removable；Demoulding concrete easy to damage too early, it is too late, it influences template and is used in turn；

S7, concrete curing, joint-cutting.

As a further solution of the present invention: step S1 content are as follows: released first according to preprepared design drawing Center line, sideline and elevation of top surface, while according to the center line put well, the concrete piecemeal line of construction drawing is checked at the scene； Precise measurement is carried out to regulating course top surface with total station, used vertical control point and neighbouring vertical control point are joined It surveys, to ensure the design thickness leveling function of C20 concrete base layer, cuts dross, laitance, remove the sundries such as soil, mountain flour, And it is rinsed well with giant.

As a further solution of the present invention: step S2 particular content are as follows: regulating course is detected before installing template, mould Connection between plate need to be closely smooth, must not have faulting of slab ends, dislocation, irregularity phenomenon, the filling of template joint is close, on the inside of template Apply high-quality release agent；Lateral stay after template installation is in place checks that the thickness in the middle part of concrete, measured value are less than design thickness When, the raised area must be scabbled to guarantee concrete base layer thickness；Concrete face slab is using the enough channel steels of rigidity as side form, mould Plate height and concrete topping uniform thickness；Template connection must securely, it is close, do not misplace, not spillage, Ying Zhishun, smooth, every 1m sets and supports at 1 Device, apical side height are calibrated with level meter, inside brushing release agent and plastic covering film mortar leakage prevention.

As a further solution of the present invention: in step S3；Concrete stirring and preparation method: concrete preparation is using self-control concrete, 2# Mixing station central mix, and it is equipped with generating set, guarantee continuous construction；The every disk mixture quantity of blender is put into, should strictly be pressed The metering of concrete coordination in works；Ordering in launching is preferably rubble, cement, sand, adds water after charging while stirring, and additive is preferably diluted to Solution, it is uniform to be added；Concrete mixing time should be required most preferably to stir through trial mix determination with construction by match ratio requirement to its workability It mixes the time, every disk mixing time is preferably 80-120s；Concrete transportation resources: it is transported using transport vehicle；When shipping concrete mixture, if having Segregation phenomenon, concrete vehicle is unloaded to scene pave before, secondary mix should be carried out；Concrete mixture is transported to making point after blender discharging It paved, vibrated, do face, until pouring the permission maximum duration finished.

As a further solution of the present invention: in step S4, what concrete paved method particularly includes: in advance between reply template Every, height, lubrication, supporting & stablizing situation and the smooth of base, wetness conditions are comprehensively checked；Concrete, which is transported to, to pave a little Afterwards, it can directly pour into the road slot of installation side form, and artificial levelling, if mixture has segregation phenomenon, then be turned with spades It is even；It must not be shed when paving, paving be spread with square spade button shovel method, to keep the uniformity of concrete；It is pre- that paving thickness is considered as jolt ramming Stay height；Concrete pavement construction will continuously construct as far as possible, provide in the region being continuously poured that casting process must not at one Interrupt, also not handy mix it is dry and astringent and add water；It must do to decontrol after treatment of construction joints and continue to construct if the dead time is longer；

What concrete vibrated method particularly includes:

A, firstly, it is primary in the vibration something incosiderate vibration of the plate vibrators such as template edge corner with immersion vibrator, together One position is more than or equal to 20s, and immersion vibrator moves 1.5 times of spacing less than or equal to the radius that works, and avoids collision mould Plate；And then vibrated comprehensively in a crisscross manner with plate vibrator, when vibrating in length and breadth, 10-20cm should be overlapped；Same position vibrates When, when the ratio of mud is less than 0.45, vibrating time should not be less than 30s, and when the ratio of mud is greater than 0.45, vibrating time should not be lacked In 15s, it is subject to and no longer bubbles and glow cement mortar；

B, concrete is after vibrate comprehensively, then further draws jolt ramming with vibrating beam and tentatively flatten；Vibrating beam draws 2-3 back and forth Time, make its surface bleeding, and drive bubble out of；The mobile speed of walking beam wants slow and uniform, in place of injustice, should in time with Artificial mend is filled out levelling, using thinner mixture mud jacking when benefit is filled out, is forbidden to be starched with sharp sand and be filled up, walking beam does not allow when advancing It stops over；Traction rope can not be too short, to reduce the inclination of walking beam bottom；Walking beam bottom will keep straight, when bending is super It should adjust or replace when crossing 2mm；

C, last again with the straight further tumbling surface of rolling bar, make the further warehouse in surface and mixes well；Such as find concrete table Face and arch bar still have larger height difference, short benefit should fill out levelling again, the rolling that shakes again is whole；Flatness is checked using guiding ruler, discovery is not It should be further processed and strike off in place of meeting, until flatness meets the requirements；

D, surface laitance is carried out using floating rule striking off processing；If striking off laitance in two times, overlapping must be had twice by striking off Part must not leak and scrape；

E, it after just being shaken using vibrating spear, is shaken using three roll shaft essences levelling；Three roll shafts are special using preceding needing to carry out operator Item training, to accomplish man-machine harmony in construction；The three roll shaft speeds of travel are controlled in 0.4~0.5m per minute, sufficiently to mention It starches and aggregate is avoided to dig；It continuously, uniformly to carry out, must not be interrupted when vibration without reason；

F, tunnel substrate surface is sprinkled water and is sufficiently humidified so as on the day before concreting, tunnel is faced upward again before pouring Vault face is wet, but cannot have ponding；Concrete is using manually shakeouing, then with plate vibrator and 50 type internal vibration sticks Combine operation of vibrating, is finally placed in template with three roll shaft units and carries out smart vibration；When manually shakeouing, paving thickness need to be higher by Template 2cm~3cm, the uneven place in part is by the way of artificial feed supplement after three roll shafts vibrate, transversely using plate vibrator Will slowly, steadily when dragging, and moving, one third or so will be overlapped by vibrating area back and forth；Concrete should stir evenly, face Color is consistent, must not there is isolation and excreting water phenomenon.

As a further solution of the present invention: in step S7, concrete curing, joint-cutting method particularly includes: concrete paving Health is immediately begun to after the completion of building, causes contraction fissure and watering health too early to cause concrete de- to prevent moisture content to scatter and disappear too early Skin, the health by the way of the health-preserving preparation covering of moisturizing simultaneously, health is with geotextiles using the cotton geotextiles that can be retained；Especially Moisturizing (temperature) health of 7d before paying attention to, preceding 7d keep full water health, watering health are carried out in 28d curing period；The intensity of concrete Joint-cutting, strict control seam quality are begun to when reaching 20MPa；The joint-cutting as early as possible under conditions of not generating chipping, to prevent from producing Raw contraction fissure；Joint-cutting, the alignment of block plate lancing location are carried out at tunnel subsidence seam, width of slit 3mm, depth is not less than 70mm。

Compared with prior art, it the beneficial effects of the present invention are: the present invention describes Specific construction step in detail, effectively solves The power signs such as small scrunch, mylonite, Schistosity zone and mirror surface scratch of having determined mutually mix, and the area Sui Zhi of section steep dip applies The problem of work hardly possible prevents construction from sending unexpected, highly-safe, is also beneficial to environmental protection.

Specific embodiment

The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general Logical technical staff every other embodiment obtained without making creative work, belongs to protection of the present invention Range.

In the embodiment of the present invention, a kind of road surface base layer construction method thereof, steps are as follows:

S1, surveying and locating；

First center line, sideline and elevation of top surface are released according to preprepared design drawing, while according to putting well Center line checks the concrete piecemeal line of construction drawing at the scene；Precise measurement is carried out to regulating course top surface with total station, it is right Used vertical control point and neighbouring vertical control point carry out translocation, and the design thickness to ensure C20 concrete base layer is whole Flat function cuts dross, laitance, removes the sundries such as soil, mountain flour, and rinsed well with giant；

S2, template is installed；

Regulating course is detected before installing template, the plan-position of template and elevation meet design requirement, template installation It need to consolidate, the active force of shock and vibration when paving, vibrating, flatten can be born；Connection between template need to be closely smooth, no Must there are faulting of slab ends, dislocation, irregularity phenomenon, for the filling of template joint closely with mortar leakage prevention, template inside applies high-quality release agent；Mould After plate installation is in place, lateral stay, checks the thickness in the middle part of concrete, when measured value is less than design thickness, must will be higher by portion Divide and scabbles to guarantee concrete base layer thickness；Concrete face slab is using the enough channel steels of rigidity as side form, template height and concrete topping etc. It is thick；Template connection must securely, it is close, do not misplace, not spillage, Ying Zhishun, smooth, every 1m sets support device at 1, apical side height It is calibrated with level meter, inside brushing release agent and plastic covering film mortar leakage prevention；

S3, concrete mixing and stirring and transport；

(1) concrete stirring and preparation

Concrete preparation is equipped with generating set using self-control concrete, the central mix of 2# mixing station, guarantees continuous construction；

The every disk mixture quantity of blender is put into, should strictly be measured by concrete coordination in works；Ordering in launching is preferably rubble, water Mud, sand add water while stirring after charging, additive is preferably diluted to solution, uniform to be added；

Concrete mixing time should require its workability to determine best mixing time through trial mix by match ratio requirement and construction, often Disk mixing time is preferably 80-120s；

(2) concrete transports

The quantity and configuration of haulage vehicle are determined in construction according to haul distance, concrete stirring capacity, the ability of paving；Preferably use transport Vehicle transport；

Ship concrete mixture, unsuitable spillage, and prevent from isolating, if there is segregation phenomenon, concrete vehicle is unloaded to scene pave before, Ying Jin The secondary mix of row；

Concrete mixture from blender discharging after, be transported to making point and paved, vibrate, do face, until pour finish permit Perhaps maximum duration is tested room by test and is determined according to jelling time and construction temperature；

S4, tunnel base concrete placings；

(1) concrete paves

Before concrete paves, cope with interval, height, lubrication, supporting & stablizing situation and the smooth of base of template, wetness conditions into Row is comprehensive to be checked；

Concrete is transported to pave a little after, can directly pour into the road slot of installation side form, and artificial levelling, as mixture has isolation Phenomenon is then turned uniformly with spades；It must not be shed when paving, paving be spread with square spade button shovel method, to keep the uniformity of concrete；

Paving thickness is considered as the reserved height of jolt ramming；

Concrete pavement construction will continuously construct as far as possible, provide in the region being continuously poured that casting process must not at one Interrupt, also not handy mix it is dry and astringent and add water；It must do to decontrol after treatment of construction joints and continue to construct if the dead time is longer；

(2) concrete vibrates

Firstly, it is primary in the vibration something incosiderate vibration of the plate vibrators such as template edge corner with immersion vibrator, it is same Position should not be less than 20s, and the mobile spacing of immersion vibrator is not preferably greater than 1.5 times of the radius that do not work, and avoids collision mould Plate；And then vibrated comprehensively in a crisscross manner with plate vibrator, when vibrating in length and breadth, 10-20cm should be overlapped；Same position vibrates When, when the ratio of mud is less than 0.45, vibrating time should not be less than 30s, and when the ratio of mud is greater than 0.45, vibrating time should not be lacked In 15s, it is subject to and no longer bubbles and glow cement mortar；

Concrete is after vibrate comprehensively, then further draws jolt ramming with vibrating beam and tentatively flatten；Vibrating beam draws 2-3 back and forth Time, make its surface bleeding, and drive bubble out of；The mobile speed of walking beam wants slow and uniform, in place of injustice, should in time with Artificial mend is filled out levelling, using thinner mixture mud jacking when benefit is filled out, is forbidden to be starched with sharp sand and be filled up, walking beam does not allow when advancing It stops over；Traction rope can not be too short, to reduce the inclination of walking beam bottom；Walking beam bottom will keep straight, when bending is super It should adjust or replace when crossing 2mm；

Finally again with the straight further tumbling surface of rolling bar, makes the further warehouse in surface and mix well；Such as find concrete surface Still have larger height difference with arch bar, should again it is short benefit fill out it is levelling, again shake rolling it is whole；Flatness is checked using guiding ruler, discovery is not inconsistent It should be further processed and strike off in place of closing, until flatness meets the requirements；

Surface laitance is carried out using floating rule to strike off processing；If striking off laitance in two times, overlapping portion must be had twice by striking off Point, it must not leak and scrape；

After just being shaken using vibrating spear, shaken using three roll shaft essences levelling；Three roll shafts are special using preceding needing to carry out operator Training, to accomplish man-machine harmony in construction；The three roll shaft speeds of travel are controlled in 0.4~0.5m per minute, with abundant warehouse With avoid aggregate from digging；It continuously, uniformly to carry out, must not be interrupted when vibration without reason；

Tunnel substrate surface is sprinkled water and is sufficiently humidified so as on the day before concreting, again to tunnel inverted arch before pouring Top surface is wet, but cannot have ponding；Concrete is used and is manually shakeout, then is joined with plate vibrator and 50 type internal vibration sticks Conjunction is vibrated operation, is finally placed in template with three roll shaft units and is carried out smart vibration；When manually shakeouing, paving thickness needs high depanning Plate 2cm~3cm, the uneven place in part is transversely dragged by the way of artificial feed supplement using plate vibrator after three roll shafts vibrate Will slowly, steadily when moving, and moving, one third or so will be overlapped by vibrating area back and forth；Concrete should stir evenly, color Unanimously, must not there are isolation and excreting water phenomenon；

S5, concrete plucking；

Surface layer is subjected to hair pulling treatment using plucking brush, plucking carries out immediately after cement concrete initial set, unsuitable too early Also should not too late, ineffective too early, then concrete hardening can not plucking too late；

S6, form removable；

Demoulding concrete easy to damage too early, it is too late, it influences template and is used in turn；Striking time is according to temperature and concrete Gain in strength situation determines, allows striking time (calculating since finishing the face of doing) such as following table；

Demoulding is careful to operate, and does not damage the concrete of concrete edges of boards, plate angle, and form removable pulls out wedge work using dedicated Tool is forbidden to dismantle template using sledgehammer attack；

The template of dismounting is cleaned out in time, and brushing template oil, is stacked neat；It is timely when template has damage, deforms Correction reparation is carried out, its precision is made to meet code requirement；

S7, concrete curing, joint-cutting；

(1) health is immediately begun to after the completion of concrete making, cause contraction fissure and too early to prevent moisture content to scatter and disappear too early Watering health causes concrete to peel, and the health by the way of the health-preserving preparation covering of moisturizing simultaneously, health can be protected with geotextiles use The cotton geotextiles of water；Moisturizing (temperature) health of 7d before paying special attention to, preceding 7d keep full water health, carry out in 28d curing period Watering health；

The intensity of concrete begins to joint-cutting, strict control seam quality when reaching 20MPa；In the condition for not generating chipping Under joint-cutting as early as possible, to prevent contraction fissure；Joint-cutting is carried out at tunnel subsidence seam, block plate lancing location is aligned, and joint-cutting is wide 3mm is spent, depth is not less than 70mm.

It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, nothing By from the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by institute Attached claim rather than above description limit, it is intended that will fall within the meaning and scope of the equivalent elements of the claims All changes be included within the present invention.

In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiments being understood that.

Claims (7)

1. a kind of road surface base layer construction method thereof, which is characterized in that steps are as follows:

S1, surveying and locating；

S2, template is installed；

S3, concrete mixing and stirring and transport；

S4, tunnel base concrete placings；Respectively include that concrete paves, concrete vibrates；

S5, concrete plucking；Surface layer is subjected to hair pulling treatment using plucking brush, plucking after cement concrete initial set immediately into Row；

S6, form removable；

S7, concrete curing, joint-cutting.

2. road surface base layer construction method thereof according to claim 2, which is characterized in that step S1 content are as follows: first according to thing First ready design drawing releases center line, sideline and elevation of top surface, while according to the center line put well, verification is applied at the scene The concrete piecemeal line of work drawing；Precise measurement is carried out to regulating course top surface with total station, to used vertical control point with Neighbouring vertical control point carries out translocation and cuts dross, laitance to ensure the design thickness leveling function of C20 concrete base layer, The sundries such as soil, mountain flour are removed, and are rinsed well with giant.

3. road surface base layer construction method thereof according to claim 2, which is characterized in that step S2 particular content are as follows: install mould Regulating course is detected before plate, the connection between template need to be closely smooth, must not have faulting of slab ends, dislocation, irregularity phenomenon, template connects Filling is close at head, and high-quality release agent is applied on the inside of template；Lateral stay after template installation is in place, checks the thickness in the middle part of concrete Degree must scabble the raised area when measured value is less than design thickness to guarantee concrete base layer thickness；Concrete face slab is using rigidity foot Enough channel steels are as side form, template height and concrete topping uniform thickness；Template connection must securely, it is close, do not misplace, not spillage, Ying Zhishun, Smooth, every 1m sets support device at 1, and apical side height is calibrated with level meter, inside brushing release agent and plastic covering film.

4. road surface base layer construction method thereof according to claim 3, which is characterized in that in step S3；

Concrete stirring and preparation method: concrete preparation is equipped with generating set using self-control concrete, the central mix of 2# mixing station, guarantees to connect Continuous construction；The every disk mixture quantity of blender is put into, should strictly be measured by concrete coordination in works；Ordering in launching be rubble, cement, Sand adds water while stirring after charging, additive is diluted to solution, uniform to be added；Concrete mixing time should by match ratio requirement with Construction requires its workability to determine best mixing time through trial mix, and every disk mixing time is 80-120s；

Concrete transportation resources: it is transported using transport vehicle；Ship concrete mixture when, if there is segregation phenomenon, concrete vehicle is unloaded to scene pave before, It should carry out secondary mix；Concrete mixture is transported to making point and is paved, vibrates, does face after blender discharging, until having poured Complete permission maximum duration.

5. road surface base layer construction method thereof according to claim 4, which is characterized in that in step S4, specific side that concrete paves Method are as follows: in advance should interval to template, height, lubrication, supporting & stablizing situation and the smooth of base, wetness conditions carry out it is comprehensive It checks；Concrete is transported to pave a little after, can directly pour into the road slot of installation side form, and artificial levelling, as mixture has isolation existing As then being turned uniformly with spades；It must not be shed when paving, paving be spread with square spade button shovel method, to keep the uniformity of concrete；It paves Thickness is considered as the reserved height of jolt ramming；Concrete pavement construction will continuously construct as far as possible, provide the region being continuously poured at one Interior, casting process must not interrupt, also not handy mix it is dry and astringent and add water；If the dead time is longer must do treatment of construction joints after put It opens and continues to construct；

What concrete vibrated method particularly includes:

A, firstly, being shaken once with immersion vibrator in the plate vibrators such as template edge corner vibration something incosiderate, same position It sets and is more than or equal to 20s, immersion vibrator moves 1.5 times of spacing less than or equal to the radius that works, and avoids collision template；Its It is secondary to be vibrated comprehensively in a crisscross manner with plate vibrator again, when vibrating in length and breadth, 10-20cm should be overlapped；When same position vibrates, work as water When gray scale is less than 0.45, vibrating time should not be less than 30s, and when the ratio of mud is greater than 0.45, vibrating time should not be less than 15s, with It no longer bubbles and glows subject to cement mortar；

B, concrete is after vibrate comprehensively, then further draws jolt ramming with vibrating beam and tentatively flatten；Vibrating beam is drawn 2-3 times back and forth, Make its surface bleeding, and drives bubble out of；The mobile speed of walking beam wants slow and uniform, should be in time with artificial to injustice place Benefit is filled out levelling, and benefit using thinner mixture mud jacking, is forbidden to be starched with sharp sand and be filled up, walking beam does not allow midway to stop when advancing when filling out It stays；Traction rope can not be too short, to reduce the inclination of walking beam bottom；Walking beam bottom will keep straight, when bending is more than 2mm It should adjust or replace；

C, last again with the straight further tumbling surface of rolling bar, make the further warehouse in surface and mixes well；Such as find concrete surface with Arch bar still has height difference, should again it is short benefit fill out it is levelling, again shake rolling it is whole；Flatness is checked using guiding ruler, finds discrepancy It should be further processed and strike off, until flatness meets the requirements；

D, surface laitance is carried out using floating rule striking off processing；If striking off laitance in two times, lap must be had twice by striking off；

E, it after just being shaken using vibrating spear, is shaken using three roll shaft essences levelling；Three roll shafts are using preceding needing to carry out special training to operator Instruction, to accomplish man-machine harmony in construction；The control of the three roll shaft speeds of travel in 0.4~0.5m per minute, with abundant warehouse and Aggregate is avoided to dig；It continuously, uniformly to carry out, must not be interrupted when vibration without reason；

F, tunnel substrate surface is sprinkled water and is sufficiently humidified so as on the day before concreting, again to tunnel inverted arch top before pouring Face is wet, but cannot have ponding；Concrete is used and is manually shakeout, then is shaken with plate vibrator and 50 type internal vibration sticks joint Operation is smash, is finally placed in template with three roll shaft units and carries out smart vibration；When manually shakeouing, paving thickness need to be higher by template 2cm ~3cm, the uneven place in part is transversely dragged by the way of artificial feed supplement using plate vibrator after three roll shafts vibrate, and Will slowly, steadily when mobile, one third will be overlapped by vibrating area back and forth；Concrete should stir evenly, solid colour.

6. road surface base layer construction method thereof according to claim 5, which is characterized in that in step S7, concrete curing, joint-cutting Method particularly includes: health is immediately begun to after the completion of concrete making, the health by the way of the health-preserving preparation covering of moisturizing simultaneously is supported It is raw that the cotton geotextiles that can be retained are used with geotextiles；The moisturizing, heat preservation health of 7d, preceding 7d keep full water to support before paying special attention to It is raw, watering health is carried out in 28d curing period；The intensity of concrete begins to joint-cutting when reaching 20MPa；In the item for not generating chipping Joint-cutting as early as possible under part；Joint-cutting, the alignment of block plate lancing location are carried out at tunnel subsidence seam, width of slit 3mm, depth is not less than 70mm。

7. application of the road surface base layer construction method thereof as described in claim 1-6 is any in constructing tunnel.