土石计算（Soil rock calculation）.doc

土石计算（Soil rock calculation） Cross sectional design of Subgrade Earthwork quantity calculation and allocation (2011-03-03 17:57:11). We label: ditch earthwork transportation distance education Excerpt from: highway cost network () full text address: /news.asp, id=1381t=718 The earthwork of subgrade is one of the main quantities of highway engineering. In the comparison of highway design and route scheme, the amount of earthwork and stonework of subgrade is one of the main technical and economic indexes to evaluate the quality of highway side setting. In the preparation of highway construction organization plan and project budget, also need to determine the stone roadbed segment and line number. The shape is very complicated, earthwork is not a simple geometry, so the calculation is only approximate, the calculation accuracy depends on the pile spacing, in surveying cross section point density and calculation formula and the actual situation of close degree. Calculation should generally be based on the requirements of the project, under the premise of ensuring the use of, and strive to simplify. I. calculation of cross-sectional area The basal area of cut and fill subgrade, is surrounded by in-situ section surface line and subgrade design line area, above the ground line to fill, to dig below the ground line, the two should be calculated separately, the calculation method of the introduction of several commonly used area. Method of product distance: applicable to irregular figure area calculation The cross section is divided into a plurality of small width, a cumulative per center height multiplied by the width of the graph area. As shown in Figure 5-34, the cross section is divided into a number of trapezoidal and triangular strips according to the width of the unit, and the approximate area of each of the small blocks is: Fi=bhi Cross-sectional area: When b=1m, the F is numerically equal to the sum of the average height of each of the small blocks, sigma hi. Require