How many holes are drilled per kilometer of highway design?

According to the length of the road section decides, a group of data is at least 3 borehole specimens, when the pass rate of a group of tests is less than 60, or the average value is less than the required degree of compaction, can double the number of test points. If the pass rate of 6 measurement points is less than 60, or when the average value still does not meet the compaction requirements, it is allowed to double the number of test points, and its pass rate is required to be greater than 60, and meet the specified compaction requirements (note that all data recorded shall not be abandoned). If the requirements are still not met, the accuracy of the standard density should be checked to determine whether rework is required and the scope of rework.

When the compaction of all borehole specimens is consistently stable and meets the requirements, the drilling frequency can be reduced to no less than one hole per kilometer. During the construction process, the drilled specimens should be numbered and labeled for preservation, so as to be used when the project is handed over and accepted.

Comparison between the drilling method and the nuclear densitometer for detecting the density of the pavement without damage. A standard test method to determine the degree of compaction. The nuclear instrument and other non-damage tests are measured in the hot state after rolling and forming, and the average value of 13 measurement points is taken as 1 group of data, and there shall be no less than 3 groups in a test section.

The borehole method is determined after the 2nd or 3rd day, and the number of boreholes is not less than 12.

This should be determined according to the geological conditions, if the stratum strike is well judged, drill a few fewer holes; If the stratigraphic changes are complex and difficult to judge, or there are bad geology (karst, faults, coal seams) underneath, it is necessary to re-investigate and encrypt the exploration holes.

Summary. Before building a highway, site investigation and drilling are required to determine the geological topography and the feasibility of the design scheme. According to the code, drilling should be carried out within the specified range, but the distance from the route is not strictly specified.

Generally speaking, exploration more than 100 meters away from the route can accurately grasp the geological conditions, and will not affect the road construction and future use, can be regarded as qualified. It should be noted that the exploration design should meet the requirements of the specification, and the exploration data should be rigorously tested to ensure its accuracy and reliability.

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Before building a highway, it is necessary to conduct site investigation and drilling to determine the feasibility of the terrain and design scheme. According to the code, drilling should be carried out within the specified range, but the distance from the route is not strictly specified. Generally speaking, the exploration more than 100 meters away from the route can accurately grasp the geological conditions, and will not affect the road construction and future use, can be regarded as qualified.

It should be noted that the exploration design should meet the requirements of the specification, and the exploration data should be rigorously tested to ensure its accuracy and reliability. Staring at Kai.

The highway engineering survey specification is the basic specification of buried silver in the field of highway construction in China, which stipulates the content, liquid dust method, data and reporting requirements of highway engineering survey, and plays an important role in ensuring the feasibility and safety of highway construction projects. In exploration and drilling, it is necessary to pay attention to safety and environmental protection to prevent the impact on the environment and human health caused by pollution and damage during exploration. In addition, for large-scale projects such as expressways, survey and design should be carried out in strict accordance with relevant specifications and requirements to ensure the quality and safety of the project.

The survey process, data and analysis results should be recorded in detail in the survey report, so as to provide reliable basic data and technical support for subsequent construction. <>

Summary. Hello dear, the survey and drilling before the highway is more than 100 meters away from the route is unqualified. According to the "Highway Engineering Survey Code", when building a highway, the control points, station points and section points of the survey center line and longitudinal section line should be located on the design line, and the layout of the detection hole should follow the principle of "dense is dense and sparse" to ensure the accuracy and reliability of the survey results.

Therefore, if the hole is drilled more than 100 meters away from the route, it may have a certain impact on the survey results, which will affect the quality and safety of engineering design and construction.

Hello dear, the survey and drilling before the highway is more than 100 meters away from the route is unqualified. According to the "Highway Engineering Survey Code", when building a highway, the control points, station points and section points of the survey center line and the longitudinal section line should be located on the design line, and the layout of the detection hole should follow the principle of "dense is dense, sparse is sparse", and the accuracy of the survey results and the reliability of the bridge can be drafted with a strong key. Therefore, if the hole is drilled more than 100 meters away from the route, it may have a certain impact on the survey results, which will affect the quality and safety of engineering design and construction.

Related: Surveys before the construction of a highway are very important to help determine the route and assess the geological and topographic conditions, so that the road can be planned and designed. In surveys, perforation is a common survey method to gain an in-depth understanding of the condition of the subsurface soil.

However, during the survey, the location of the probe hole should be as close as possible to the design line in order to more accurately assess the geological conditions and topographic conditions, and to ensure the feasibility of the road design scheme.