What does it mean to reinforce the roadbed

The first floor is very right, specifically, the degree of compaction is insufficient, the water content of the roadbed is lost after passing (it needs to be replenished and then pressed), and the impact rolling and turning rolling all belong to this category. This is only a construction measure and empirical practice, and there is no specific provision. The goal is to meet the compaction standards required by the specification.

Generally speaking, it is mainly because the actual detection of the compressive strength of the roadbed does not meet the design requirements and the remedial measures are taken.

The first floor is right, in layman's terms, it is mainly because the actual detection of the compressive strength of the roadbed does not meet the design requirements and the remedial measures taken.

The highway subgrade can effectively reduce the post-construction settlement of the highway subgrade through the impact rolling of the impact roller, greatly improve the road diseases formed due to uneven settlement, improve the overall strength and uniformity of the subgrade, and have significant effects on exposing the internal defects of the subgrade or subgrade, avoiding hidden dangers, and improving the construction quality.

The reinforcing operation is to detect and enhance the pressure, that is, on the basis of the vibration roller compaction, the impact roller is used to make up the pressure, and the impact roller of the impact roller is used to exert a strong instantaneous impact force on the foundation, and the original moisture and air in the soil are extruded, and the "flow" of the soil particles is enhanced under the strong punching force, and fewer particles are squeezed into the gaps of large particles.

Therefore, the enhanced pressure of the highway subgrade is the mandatory "secondary settlement" on the basis of compaction. In this enhanced pressure supplement, the subgrade foundation obtains the difference between settlement and settlement again, and also makes the original compaction operation be detected, and then directly achieves the effect of finding the weak link in advance and eliminating the settlement after the defect in advance, and improves the overall strength and bearing capacity of the subgrade.

The construction process of the impact roller, the manufacturer will take you to understand the detection and enhancement of the impact roller.

Impact roller reinforcement rolling.

The dry capacity increases after the pavement is compacted.

If the volume of the soil is large, the dry capacity of the soil will increase significantly after the admixture is compacted, which will affect the compaction effect of the road surface. The degree of compaction will be inflated in a short period of time, interfering with the judgment of the construction personnel.

Therefore, the construction personnel should carry out the dry bulk density test of the construction materials before the road compaction construction. Based on the test results, the ratio of construction raw materials is determined, and the uniformity of the material ratio is guaranteed as much as possible, so as to lay a good foundation for formal construction.

Brief introduction. If the moisture content is too low, it can also cause problems. The main reason is that there is too little water, and the adhesion of the liquid soil molecules will decrease, which is not easy to form under the treatment of compaction equipment, and the compaction effect is not good.

Therefore, when formulating the subgrade pavement compaction construction plan, it is necessary to fully consider the moisture content of the subgrade soil, do a good job in the preliminary investigation, and adjust and improve the construction plan according to the soil moisture content, so as to ensure the smooth carrying out of the actual construction.

The degree of compaction of the soil foundation has a great influence on the stability and bearing capacity of the roadbed.

The roadbed is an important part of highway engineering, and its role is to bear the vehicle load and transfer it to the foundation and the ground. The stability and bearing capacity of the roadbed directly affect the service life and safety performance of the highway.

The degree of compaction of a soil foundation refers to the degree of contact between soil particles, which is usually measured by soil density. If the degree of compaction of the soil foundation is not enough, then when the vehicle is driving, the soil will be settled and deformed, resulting in uneven road surface and unstable vehicle driving. At the same time, due to the loose soil, the water is easy to penetrate into the subgrade bureau, causing softening and further aggravating the settlement and deformation of the road surface.

Conversely, if the soil foundation is too compact, it will be difficult for water to penetrate into the soil, and the ability to drain will also be affected. In this way, the rainwater cannot be removed in time, and it is easy to cause water accumulation in the rainy season or humid environment. At the same time, under the action of load, the soil that is too compact is also prone to cracking, fracture and other phenomena, thereby affecting the stability and bearing capacity of the roadbed.

Therefore, in order to ensure the stability and bearing capacity of the roadbed, the soil foundation needs to be properly compacted to achieve a reasonable density requirement.

There are many factors that affect the degree of compaction, first of all, the water content, secondly, the power of the compaction machinery, and then look at the compaction thickness and the size of the crushed particles.

Encyclopedia of Subgrade Compaction Problems (ENH).

In the process of compaction of the roadbed, the main problems are as follows:

1. Reasons for insufficient compaction of the roadbed.

1. The number of compaction times is unreasonable.

2. The mass of the roller itself is small.

3. The filling is soft and the paving thickness is too large.

4. The rolling is uneven, and there is a phenomenon of local pressure leakage.

5. The water content is greater than the optimal water content, especially more than the optimal water content by two percentage points, resulting in the spring phenomenon.

6. There is no treatment of the floating soil or soft layer on the surface of the upper layer.

7. There are many types of soil in the soil field, and there are heterogeneous soil fills; In particular, the soil with poor permeability wraps the soil with good wateriness, forming a water bladder and causing the spring phenomenon;

8. The filling particles are too large (>10cm), the void between the particles is too large, or the filler that does not meet the requirements is used (the natural consistency is less than that, the liquid limit is greater than 40, and the plasticity index is greater than 18).

Second, the main reason for the insufficient compaction of the subgrade edge.

1. The width of the subgrade filling is insufficient, and the construction is not carried out according to the requirements of ultra-wide filling.

2. The compactor can not be crushed.

3. The edge of the roadbed is not enough to leak pressure or compaction times.

4. When the three-wheel roller is used for rolling, the edge belt (0 75cm) rolls the regional driving belt with a rolling frequency.

3. Causes of roadbed overpressure.

1. Now many construction sites still use the old method of human monitoring and measurement, and there may be most of them when manually monitoring the number of rollers, or directly fill in the wrong data on the report to cause subgrade overvoltage, subgrade overpressure will cause the construction unit to be time-consuming and laborious, and will consume a lot of resources.

The problem of subgrade compaction is mainly due to the fact that the construction unit is not in place in the supervision during the construction process, and fails to keep up with the pace of the times to take digital construction, Xi'an ENH digital construction does not need to invest a lot of manpower and material resources, the machine can operate 24 hours a day, and the data will be transmitted to the manager's mobile phone or ipad, and the construction manager can check the construction status anytime and anywhere, and find that there is a weak area of compaction or leakage, overvoltage, etc., there will be a text message alarm function, and the problem will be corrected in time, from the original post-inspection to real-time correction.