20
.
4
.
Cement powder spraying pile construction ratio test should be carried out first, and the pile test work should not be less; the elevation ash quantity should be checked frequently, and the pile top re mixing is also important
.
12
.
44
.
35
.
The blasting design of stone deep cutting on single side slope should be combined with the actual situation, and the slope protection should be put in the first place; the mechanical construction should speed up the progress, and the blast hole form should be comprehensively arranged
.
Source: if there is any infringement, please contact to delete subgrade construction, base, subbase construction, asphalt concrete pavement construction, cement concrete pavement construction, bridge and culvert construction Do you remember the key points of so many construction contents? It doesn’t matter if you can’t remember
.
The compaction of earth rock embankment is different, depending on the amount of stone and particle size; more blocks belong to rock filling, less blocks belong to filling
.
13
.
The stability of rock blasting slope is the most important, and small guns should be used in the design; two rows of holes near the slope are more reliable to weaken the loosening
.
22
.
39
.
Stable soil underlayer inspection construction inspection underlayer, appearance requirements meet the standard; internal quality inspection, all qualified before construction
.
19
.
25
.
The mixing equipment and mixing equipment of hot mix asphalt mixture should be advanced, complete and coordinated; the mixing time should be well controlled, the temperature should be appropriate, and the material should be evenly mixed
.
The curing of stabilized soil mixture specimens should be mastered, familiar with the method and strict operation; the data should be true and accurate, and the construction should be guided to ensure the quality
.
Some people have sorted these into Doggerels
.
The selection of compaction machinery, the selection of compaction machinery, hydrostatic machinery is commonly used; sand vibration and compaction efficiency is high, sheep foot rolling clay is good
.
When the rockfill embankment is compacted, the heavy machinery will work, and the light machinery will reduce the thickness, check the compaction and measure the settlement
.
Road mixing construction, shaping, compaction and leveling are the forerunner, and shaping technology is indispensable; operation according to regulations should be skilled, and mechanical matching should be ensured
.
Stabilize the soil road mixing method, turn it over at the beginning and do not mix it to the end, so as to prevent the rubber from sinking; eliminate the interlayer material, mix it well, and mix it in depth of one centimeter
.
8
.
They are too powerful
.
23
.
Fill the abutment back of bridge and culvert, select good materials for abutment back filling, and fully compact the layer; the scope of backfill shall not be less, and the filling vehicle shall not jump
.
The road width meets the requirements
.
43
.
The preparation of soil for expansive soil subgrade construction is sanding, so it is important to mix evenly; there are a lot of mechanical mixing, and the key is thin filling and fast pressing
.
47
.
5
.
26
.
6
.
Paving the surface course of hot mix asphalt mixture is the requirement for the lower bearing course
.
When the water content of compaction is the best, the mechanical compaction work is less; it is a good method to turn the sun, spray water to adjust the water content, and mix the ash with excessive moisture
.
2、 Base & subbase 27, stable soil mixture composition design objective is clear, optimize the test proportion; each data has the basis, guide the construction has the guarantee
.
32
.
Before the subgrade is filled, the boundary shall be set before the embankment construction, and the surface soil shall be removed to the sideline; the filling hole shall be leveled and then compacted, so that the embankment is stable without settlement
.
49
.
40
.
45
.
The filling of different soil mixed embankment is not the same, according to the soil is divided into good layers; based on the strength of water permeability, to prevent disease subgrade stability
.
11
.
The testing of stabilized soil mixture should be carried out in time, and the problems found should be corrected in time; the application standard should be based, and the quality should be strictly controlled
.
46
.
The paving and rolling shall be compacted
.
34
.
The apparent density should be greater than 2.5, the crushing should be less than 128, the abrasion should not exceed 130, the high limit of flatness should be 115, the polishing should be more than 42, and the sand equivalent of fine aggregate should be 60%
.
It is very important to check the compactness of soil embankment, and compaction inspection is indispensable
.
14
.
The stable soil transportation road is flat without pit and sill, and the smooth transportation must be guaranteed; it is most important to shorten the time, arrive early and supply materials in time
.
It is necessary to maintain the stabilized soil properly, cover it at room temperature, increase the strength without damage, and ensure the 7-day age
.
Paving speed: the paving speed should be slow, the continuous paving should run at a uniform speed, the paving speed should be fixed, the mixing quantity should be fixed, and the paving surface should be flat.
.
If you take a look at the construction site, you will have the bottom of your heart! 1、 Subgrade 1
.
In the rolling process, the rolling technology should be kept in mind, the machinery should be well compacted, the quality standard should be strictly controlled, and the compactness and flatness are the most important
.
9
.
7
.
The oil of asphalt pavement prime coat and tack coat should be thin and infiltrated, and the base course should be sprinkled when it is slightly dry, so that it will not flow and has no surface film, so as to achieve good quality; the tack coat oil should be connected to the upper and lower layers, instead of infiltrating, it should form a film, and it is important to prevent sliding between the upper and lower layers
.
Stabilized soil construction: the stabilized soil shall be constructed carefully and strictly in accordance with the regulations; the ingredients shall be mixed evenly and the appropriate amount of water shall be compacted and stabilized
.
48
.
3、 42
.
The best water content shall be adjusted and the rolling sequence shall be controlled
.
Three stages of asphalt mixture proportioning design, target production and verification, proper use of oil, good gradation and good mixing
.
28
.
The paving and compaction of fly ash embankment shall be controlled strictly
.
17
.
The layered thickness and stone particle size of the earth rock embankment are divided horizontally, and the thickness of the earth rock fill layer is moderate, and the thickness is suitable for limiting the particle size, and the soft and hard stone particles are different
.
21
.
The compaction of fill embankment is light first and then heavy, stable first and then vibrating; from high to low, the wheel tracks overlap
.
24
.
For the compaction of high fill embankment, the self gravity is considered and the bearing capacity of foundation is tested; the layered rolling is carried out according to the regulations, and the rammer hand support is expedient
.
41
.
In the construction of Subgrade in paddy field, we should do a good job in the drainage of subgrade section, and the construction in soft foundation section should be carried out early; the key is to prepare soil mixed with ash to control frost boiling, thin filling and fast compaction
.
33
.
38
.
The filling width of filling embankment should meet the requirements to ensure that the edge is compacted; there are many diseases due to lack of filling width, and the surveying and setting out should be done carefully
.
Compaction test of subgrade filling, select good materials for embankment filling, and conduct the test before filling; the samples should be representative, and the test frequency should not be less
.
It can be paved only after the treatment is qualified
.
Subgrade filler selection: subgrade filler should be selected well, stable soil should be found carefully; soil discomfort should be improved, and the strength and particle size are more important
.
Marshall specimen standard curing, specimen curing strict temperature control, time control does not exceed the limit; test fast, accurate operation, guiding the construction is the key
.
50
.
It is necessary to survey and loft the construction of stable soil layer, and the standard template depends on it; it is necessary to retest and verify to ensure the accuracy
.
The stabilized soil shall be paved with grader, the mixture shall be paved evenly, and the coarse and fine particles shall have no pits; new materials shall be used to fill potholes, and the leveling measures can be controlled
.
The appearance quality of mixing asphalt mixture shall be strictly controlled, the heating temperature shall be strictly controlled, and the material preparation and measurement shall be accurate; the mixture shall be uniform without discoloration, and the color shall be bright without segregation
.
The turning brake shall be strictly prohibited and the maintenance and drainage shall be convenient
.
Treatment of vertical and horizontal joints in road mixing construction, proper treatment of vertical and horizontal joints, smooth high and low drop, compact mixing and rolling, no future trouble, long service life
.
Stable soil wet mixing and watering should be controlled slowly, and the amount of water should not be too dry
.
Subgrade drainage subgrade construction, drainage should be first; eliminate water immersion damage, quality assurance
.
The thickness of filling embankment should be layered, and the thickness of filling layer should be moderate; 30cm should be used as reference, and the process test should be adjusted
.
31
.
The steps of embankment filling overlap with each other, the new and old interfaces should be connected, and the steps should be excavated on the slope surface; the steps should be reserved for sectional filling, and the construction layers should be overlapped at the same time
.
29
.
3
.
The quality requirements of coarse and fine aggregates for asphalt pavement should be kept in mind
.
18
.
37
.
2
.
This is the key to the quality
.
36
.
The stabilized soil shall be mixed uniformly and the mechanical properties shall be improved; the aggregate requirements shall be strict and the mixing quality shall be guaranteed
.
16
.
10
.
The layer thickness of rock fill embankment and paving rock fill layer should be horizontal, and the thickness should be appropriate and stable; mechanical paving and manual paving should be stable
.
15
.
The compactness of embankment, whether the rock filling test is sinking or not, and the filling compaction sub standard; in area 909395, the compaction ensures the stability
.
For the Marshall test of hot plate asphalt mixture, the size of the specimen shall be strictly controlled, and the hammering height shall be accurate; the quantity of materials shall be verified, and the compaction temperature shall meet the requirements
.
The filling materials for rock fill embankment meet the requirements of strength and particle size; the upper part of roadbed should be filled with soft rock to test the bearing capacity
.
30
.
The lower layer is flat without looseness
.
The layered paving shall be controlled strictly
.
