Browsing by Author "Morris, Henry M."
Now showing 1 - 5 of 5
- Results Per Page
- Sort Options
Item Hydraulic Data Comparison of Concrete and Corrugated Metal Culvert Pipes(St. Anthony Falls Hydraulic Laboratory, 1950-07) Straub, Lorenz G.; Morris, Henry M.Full-scale tests were conducted at the St. Anthony Falls Hydraulic Laboratory of the University of Minnesota primarily for the purpose of obtaining pipe friction and entrance loss coefficients for concrete and corrugated metal culvert pipes, which would be more accurate and dependable than those currently recommended in culvert design literature. Comparison of these test data is presented in this paper and recommendations are given for design values of the coefficients under various flow conditions. The experimental studies were made on new culverts, all of which were installed and maintained with excellent alignment. A high degree of accuracy was possible in these tests for all of the culverts. Sizes up to 3 ft in diameter were investigated. Analytical studies were made of the data obtained from the experimental observations which were significant to basic pipe flow theory where systematic form roughness and large diameters come into consideration.Item Hydraulic Tests on Concrete Culvert Pipes(St. Anthony Falls Hydraulic Laboratory, 1950-07) Straub, Lorenz G.; Morris, Henry M.Included in an experimental program conducted at the St. Anthony Falls Hydraulic Laboratory of the University of Minnesota on full-scale culverts was a series of tests on concrete pipes up to 3 ft in diameter. The primary purpose of these tests was to obtain pipe friction and entrance loss coefficients which would be more accurate and dependable than those currently recommended in culvert design literature. the studies were begun in 1946. This paper is confined to a discussion of the concrete culvert test program and the results of the studies. The test series included three concrete culvert pipes, 18 inches, 24 inches, and 36 inches in diameter, respectively. Each pipe was 193 ft long and laid on a slope of 0.20 per cent, except that the 24-in. pipe was on a slope of 0.224 per cent. the pipes tested were all manufactured by the cast-and-vibrated process. Details of the pipe sections are shown on page 22. Friction and entrance loss coefficients were established for the culverts under the usual conditions of field operations: (a) Full flow with submerged inlet and outlet. (b) Part-full flow at uniform depth. The 18-in. and 36-in. diameter pipes were tested for each of the two types of flow with two different entrance conditions; namely, (a) pipe projecting 2 ft into the headwater pool, (b) pipe entrance flush with the headwall. The 24-in. pipe was tested with the projecting entrance only.Item Hydraulic Tests on Corrugated Metal Culvert Pipes(St. Anthony Falls Hydraulic Laboratory, 1950-07) Straub, Lorenz G.; Morris, Henry M.Experimental studies on culverts conducted at the St. Anthony Falls Hydraulic Laboratory of the University of Minnesota, beginning in 1946, included several series of observations on commercial , corrugated metal culvert pipes, The primary purpose of these large-scale tests was to obtain pipe friction and entrance loss coefficients which would be more accurate and dependable than those currently recommended in culvert design literature. A previous paper in this series gives a discussion of the comparison with the results of parallel studies on concrete culverts. The present paper is confined to a discussion of the corrugated pipe culvert test program and an analysis of the results of the studies. Two types of corrugated metal culverts were tested, namely, the circular and the pipe arch types. In each case, threee different nominal diameter pipe sections were tested--18 in., 24 in., and 36 in., respectively--, making a total of six corrugated metal culverts in the test program. Each pipe was 193 ft long and laid on a slope of 0.20 per cent. For the pipe arch culverts, the identifying dimensions refer to the diameters of circular pipes having the same length of periphery. For example, the 36-in. pipe arch and the 36-in. circular culvert have equal perimeters although their heights, widths, and areas are unequal. Cross sections of the various pipes, with controlling dimensions, appear in Fig. 1. (Note that the corrugation height in each case is 1/2 in. and that all computations have been based on the inside section, that is on the minimum cross-sectional area.) Friction and entrance loss coefficients were established for the culverts under the usual conditions of field operation. With this objective in view, each pipe was tested for the following conditions: (a) Full flow with submerged inlet and outlet. (b) Part-full flow at uniform depth. For each flow condition, several values of head and discharge were used. In addition, five of the culverts were tested with two different entrance conditions; namely, (a) Pipe projecting 2 ft into the headwater pool. (b) Pipe entrance flush with headwall.Item Hydraulics of Flow in Culverts(St. Anthony Falls Laboratory, 1948-10) Larson, Curtis L.; Morris, Henry M.With modern tendencies and developments in highway design, construction of culverts for cross drainage of storm runoff represents n ever-increasing item of expense. As wider highways have been built, culvert lengths have been correspondingly increased. In addition to increased lane width requirements, multiple-lane super-highways are becoming more and more prevalent. Furthermore, allowable curvatures and grades have been reduced, both of which tend to increase culvert lengths by increasing fill heights. For every increase of one foot in fill height, culverts are lengthened several feet.Item Preliminary Flow Tests on a Model Culvert(St. Anthony Falls Hydraulic Laboratory, 1949-05) Morris, Henry M.A number of tests were made with the model culvert flowing full and with both inlet and outlet submerged. The purpose of this series was to determine the straight barrel friction losses for various discharges and the influence thereon of the Reynolds number, the presence or absence of entrance rounding, and the distance from inlet. Entrance losses were also determined.