How to calculate the strength of road surface

1. According to the code for acceptance of construction quality of masonry engineering (GB 50203-2002), mortar test blocks of the same type and strength grade shall not be less than 3 groups< Random inspection quantity: at least one group of stone materials from the same place of origin shall be randomly inspected. The random inspection quantity of mortar test blocks shall be in accordance with this specification, and the strength acceptance standard of masonry mortar test blocks must meet the following requirements:
1. The average compressive strength of mortar test blocks of the same acceptance batch must be greater than or equal to the cube compressive strength corresponding to the design strength grade
2. The minimum group average value of compressive strength of mortar blocks in the same acceptance batch must be greater than or equal to 0.75 times of cube compressive strength corresponding to design strength grade.
note: ① for acceptance batch of masonry mortar, mortar blocks of the same type and strength grade should not be less than 3 groups, The average compressive strength of the test block must be greater than or equal to the cube compressive strength corresponding to the design strength grade
② the strength of mortar should be based on the compressive test results of 28 day old test block with standard curing. Sampling inspection quantity: each batch of masonry mortar of various types and strength grades not exceeding 250m3 of masonry shall be sampled at least once for each mixer;

2.

The design length is multiplied by the design width plus the actual paved area of widened parts such as arc, and the area occupied by various wells within 1.5 M2 is not dected

The square of concrete pavement belongs to road surface course, and the calculation method of road surface course is as follows:

1. Asphalt concrete for road engineering The quantities of cement concrete and other types of pavement are calculated by multiplying the design length by the design width plus the actual paved area of the widened part such as arc, excluding the area occupied by various wells within 1.5 m2&# 8194;

2. The expansion joint shall be designed according to its length × The depth of expansion joint is calculated by area, and the length of saw joint is calculated by meter&# 8194;

3. The road surface is calculated in square meters according to the area shown in the design drawing (the area of flat stone shall be dected for the surface with flat stone)

Second, the road base is to calculate the thickness of the concrete. The quantities of asphalt concrete, cement concrete and other types of road works are calculated by multiplying the design length by the design width plus the actual paved area of the widened part such as the arc, and the area of various wells within 1.5 M2 is not dected&# 8194;

2. The expansion joint shall be designed according to its length × The depth of expansion joint is calculated by area, and the length of saw joint is calculated by meter

3. The road surface is calculated in square meters according to the area shown in the design drawing (the area of flat stone shall be dected for the surface with flat stone)

extended data:

points for attention in calculation of Road area:

I. roadbed groove shaping and rolling shall be calculated by roadbed groove area according to the design drawing size, without decting the area of side edge stone and flat stone, and the width of roadbed groove shaping and rolling shall be calculated by both sides widening value according to the design roadway width. The shaping and rolling of sidewalk shall be calculated based on the sidewalk area according to the size shown in the design drawing, and the area of side curb connected with the roadway shall be dected

II. All kinds of road bases are calculated by multiplying the roadway length of the design drawing size by the width in terms of area, excluding the area occupied by various wells. The subgrade width is calculated according to the design roadway width and the widening value on both sides&# 8194;

III. according to the design drawing size, the area of the top layer of the base course is calculated, and the area of various wells is not dected&# 8194;

IV. the resonant crushed base of cement concrete pavement is calculated according to the designed top surface area

3.

Long × wide × Height = cubic meter of something

m3, read as l ì f ā ng m ǐ， It is a unit of volume, the symbol M & # 179 The Unicode code of this character is 33a5), which is equal to the volume of a cube with one meter on each side, which is equal to one cubic meter

{rrrrrrr}

< H2 > extended data:

conversion relationship

name conversion relationship

cubic meter 1 cubic meter = 1 cubic meter

cubic decimeter 1 cubic decimeter = 0.001 cubic meter

cubic centimeter 1 cubic centimeter = 0.000 001 cubic meter

square, Square 1 (square) = 1 cubic meter

cubic meter 1 cubic meter = 1 307.8 cubic meter

cubic meter 1 cubic meter = 0.037 0 cubic meter

cubic yard 1 cubic yard = 0.764 6 cubic meter

cubic foot 1 cubic foot = 0.028 317 cubic meter

cubic inch 1 cubic inch = 1.638 703 × 10 ^ (- 5) M3

4. The area multiplied by the thickness of the material is the volume.

5. The width of the surface layer is the design width; B value refers to the value of one side of the structure layer wider than the surface layer, which is equal to the sum of the thickness of the upper structure layer. Because it is on both sides, so × 2 If the thickness of surface course is 20cm, the width of base course is: road design width + 2 × 20cm If the base course is also 20cm, the width of roadbed is: road design width + 2 × 20cm+20cm

6.

Formula: C = C < sub > 0 < / sub > * (f < sub > 1 < / sub > + F < sub > 2 < / sub > +... + F < sub > n < / sub >)

where: C - actual capacity

C0 ideal capacity, and C < sub > 0 < / sub > = 3600 / T < sub > 0 < / sub > = 1000V / L < sub > 0 < / sub > (vehicle / hour), where l < sub > 0 < / sub > is the minimum headway, unit meter. V is the vehicle speed

F < sub > n < / sub > -- the nth amendment

7.

Calculation method of road capacity:

basic capacity: the maximum traffic volume obtained by the established traffic flow calculation model

extended data:

the main factors affecting road capacity are road conditions, traffic conditions and traffic environment. Road condition refers to the geometric composition of the road, such as the number of lanes, lane width, lateral resial width, driving sight distance, longitudinal slope, road condition, street condition along the line, etc

traffic condition refers to the vehicle composition and distribution characteristics of traffic flow, such as traffic volume, mixed vehicle type, pedestrian, non motor vehicle interference, etc; Traffic environment refers to the natural conditions other than road traffic, such as terrain, features, landscape, climate, etc. The combination of these three factors directly affects the driving speed and road capacity

according to the characteristics of vehicle operation state, the capacity can be divided into: section capacity, intersection capacity, capacity under confluence and diversion state, and capacity under interweave operation state

according to the nature and use requirements of traffic capacity, it can be divided into basic capacity, design capacity and actual capacity

(1) basic capacity refers to the maximum hourly traffic volume that highway facilities can pass under the four service levels under ideal road, traffic, control and environmental conditions

(2) design capacity refers to the maximum hourly traffic volume that a highway facility can pass according to the requirements of traffic operation quality in the design of a highway facility, that is, under the requirements of a certain service level. Therefore, the design capacity is related to the selected level of service

(3) the actual capacity refers to the hourly traffic volume after the service traffic volume (such as basic capacity or design capacity) under different service levels is revised according to the actual highway conditions and traffic management level of the facilities according to the specific highway geometry, traffic conditions and traffic management level when designing or evaluating a specific road section

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Zhou Wei raised his concerns: "the business model of Maidian mall is actually to use the money of new investors to pay interest and short-term return to old investors. This means that the mall should continue to attract new members, otherwise it is likely to cause a crash. "
PENG dingdai, a professor of Law School of Nanchang University, believes that the operation mode of similar rebate websites violates the law of value, and the capital operation is difficult to maintain for a long time. Once the capital chain breaks, consumers or franchisees will face losses< According to Peng dingdai's further analysis, in recent years, with the rapid development of e-commerce, the disputes caused by e-commerce are also like a shadow. At the present stage, the relevant laws and regulations of e-commerce are obviously lagging behind, which leads to the difficulties of law enforcement departments in obtaining evidence, identifying and investigating. E-commerce enterprises are basically in a regulatory vacuum, and the relevant legislation needs to be improved
PENG dingdai suggested that although it is difficult to determine the nature of the operation mode like Mai Dian mall, government departments should intervene in advance, regulate and supervise e-commerce enterprises through various ways such as administrative management, and even supervise the capital flow of enterprises, so as to avoid group complaints or disputes in the future.