25.
11.
The stabilized soil mixture shall be tested in time, and the problems found shall be corrected in time; The application standard has basis, strict control and good quality.
17.
30.
Subgrade drainage shall be constructed, and drainage shall be carried out first; Eliminate the damage of water immersion and ensure the quality.
12.
32.
The blasting design of deep excavation cutting with unilateral rock slope shall be combined with the actual situation, and the slope protection shall be put in the first place; The progress of mechanical construction is accelerated, and the blast hole form is comprehensively arranged.
37.
Compactness test of soil embankment is very important, and compaction test is indispensable; Double indexes of deflection measurement and compaction deflection of soil roadbed.
16.
Shaping, compaction and leveling by road mixing method is the guide, and the shaping process is indispensable; Be proficient in operation according to regulations, and ensure mechanical matching.
7.
The stabilized soil shall be paved with a grader, and the mixture shall be paved evenly with no pits for coarse and fine particles; New materials shall be used to repair potholes, and leveling measures can be controlled.
8.
31.
Before filling the subgrade, roll the embankment, set the boundary first, and remove the topsoil to the sideline; Fill holes, level and then compact, and the embankment is stable without settlement.
20.
Curing of stabilized soil mixture specimens shall be mastered, familiar with methods and strict operation; The data are true and accurate to guide the construction and ensure the quality.
15.
34.
Subgrade construction, base and subbase construction, asphalt concrete pavement construction, cement concrete pavement construction, bridge and culvert construction…
The filling width of filled embankment shall meet the requirements to ensure that the edge is compacted; There are many diseases due to lack of filling and side width, and the survey and setting out shall be done carefully.
2、 Construction of base and subbase 27.
The transportation road of stabilized soil is flat without pit sill, and the smooth transportation must be guaranteed; Shorten the time, arrive early and supply materials in time is the most important.
9.
6.
2.
23.
Fill embankment rolling shall be light before heavy, stable before vibration; From high to low, the wheel tracks overlap.
The filling materials for rock fill embankment are required to meet the strength and particle size; The upper part of the roadbed shall be filled with soil, and the bearing capacity of soft stone shall be tested.
18.
39.
19.
Compactness of embankment, settlement of rock fill inspection, sub standard of filling compaction; 909395 area, compaction to ensure stability.
24.
The layered thickness and stone particle size of earth rock embankment are horizontally divided, with a moderate thickness of 40cm; The thickness is appropriate to limit the particle size, and the soft and hard stones are different.
The compaction of earth rock embankment is different from that of earth rock mixed filling, which depends on the stone quantity and particle size; A large quantity is a rock fill, while a small quantity is a fill.
22.
Fill soil at the back of abutment shall be made of selected materials, and the layer shall be thin and fully compacted to; The backfilling range shall not be less, and the filling vehicle at the abutment back shall not jump.
3.
The rock fill embankment is compacted, the rock fill embankment is pressed stably, and the heavy machinery works; Reduce the thin layer with light machinery, inspect the compaction and measure the subsidence.
The composition design of stabilized soil mixture has clear design purpose, and the proportion of test and selection is optimized; All data are based and the guidance of construction is guaranteed.
It’s too powerful.
28.
Fill soil at the back of bridge and culvert abutment.
Someone has sorted these into doggerel.
Compaction test of subgrade fill.
Selection of compaction machinery: the compaction machinery is of good type, and static pressure machinery is commonly used; Sand has high vibration compaction efficiency, and sheep’s feet are good at rolling clay.
The filling thickness of embankment shall be layered, and the filling thickness shall be moderate; Thirty centimeters for reference, and then adjust the process test.
For compaction of high fill embankment, self gravity shall be considered to test the foundation bearing capacity; Layered rolling shall be carried out according to regulations, and it is expedient to hold the rammer by hand.
The paving and compaction of fly ash embankment shall be strictly controlled in layers, and the paving and rolling shall be compacted; The best water content shall be adjusted and the rolling sequence shall be controlled; It is strictly forbidden to turn around and brake, and the maintenance and drainage are boundless.
The prepared soil mixed with ash for expansive soil subgrade construction is sandy, and it is important to mix evenly; There are a lot of mechanical mixing, and the key is thin filling and fast compression.
The subgrade filler shall be selected well, and the stable soil shall be carefully found; If the soil is not suitable, it should be improved, and the strength and particle size are more important.
The construction of stabilized soil shall be carried out carefully and strictly in accordance with the regulations; The ingredients shall be mixed evenly, and an appropriate amount of water shall be compacted stably.
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.
The subgrade construction section of paddy field section shall be drained first, and the construction of soft foundation section shall be carried out early; Thin filling and rapid compaction are the key to prepare soil mixed with ash for controlled slurry turning.
38.
26.
The filling of different soil mixed embankment is different, and the layers are divided according to the soil quality; Based on the strength and permeability, the subgrade stability shall be prevented from diseases.
29.
5.
4.
33.
36.
The layer thickness of rock fill embankment and the layer of paving rock fill shall be horizontal, and the thickness shall be appropriate and stable; Mechanical paving shall be assisted by people, and manual paving shall be laid stably.
Take it out at the construction site and you’ll have a bottom in your heart! 1、 Subgrade construction 1.
13.
The survey and setting out for the construction of stable soil layer shall be indispensable, and the standard template shall be based on it; Retest verification is necessary to ensure no error in accuracy.
Do you remember the construction points of so many construction contents? It doesn’t matter if you can’t remember.
When the compaction moisture content is the best, the mechanical compaction work is less; It is a good method to turn the sun, spray water, adjust water content, and mix ash when it is too wet.
Select materials for embankment filling, and conduct the test before filling; The sample shall be representative and the test frequency shall not be less.
The stabilized soil road mixing method shall not be mixed to the end at the beginning to prevent the rubber from sinking; Remove the interlayer material, mix well, and mix again to a depth of 1 cm.
Inspect the construction of the lower bearing layer of stabilized soil, and the appearance requirements meet the standards; The internal quality shall be tested, and the construction shall be carried out after all are qualified.
21.
Rock blasting is the most important for slope stability, and small guns should be used in the design; Two rows of holes close to the slope can weaken the looseness and be more reliable.
The embankment filling steps overlap each other, the new and old interfaces shall be connected, and steps shall be excavated on the slope surface; Step filling shall be reserved in sections, and the construction layers shall be overlapped at the same time.
10.
14.
The construction ratio test of cement powder jet grouting pile shall be carried out first, and the pile test work shall not be less; Frequent inspection of elevation ash quantity and re mixing of pile top are also important.
In the rolling process, the rolling process shall be kept in mind, and the mechanical supporting compaction shall be good; Strict control of quality standards, compactness and flatness are the most important..
35.
Steady soil wet mixing watering should be controlled slowly, sometimes more or less inappropriate; The amount of water is slightly larger, it is too dry, wet and uniform, and it is good for compaction.
