Construction survey.

Construction survey.

Construction survey. Objective to obtain a basic information used in construction, such as terrain characteristics. Scope to make the construction area. Convenient transportation, or electricity and water are not enough? Underground water and soil conditions. That this information is data in the planning, designing, construction and operation.

See where the polls will explore the soil. The type of note nearby base fracture near the door. Or receive a beam or weight. Weight issues. Issues of water scour soil. May be found in some of the flow through layer. When drilling these data are derived from the questionnaire and survey. Sometimes need to learn to find more information about the soil. Typically results from the survey. Or research institutions. Information from local agencies about the photos, maps, soil And rock from the Department of Mineral Resources. This will be useful in the preparation of the necessary Must be used for implementing and preparing for initial

1. The initial exploration to penetrate the soil. Drilling or penetration of the soil is part of the area. Want to know the type of soil layer of the sort. Underground water level and the other will be useful in the preparation tool. And better planning. For soil survey. This tree may not have many steps. Is small or if the soil in field survey, may end at this step.

2. For a detailed soil survey. Detailed planning is about the soil survey. Usually indicates that all the soil to penetrate the many holes. Each hole much deeper. Have been tested in court? Positions in depth? Soil samples at any depth of hole? To test? Typically information will be made for information about the Soil Profile of soil strength (Shear Strength Parameters) and to calculate the subsidence of buildings.

3. The penetration depth of exploration. In general, tend to penetrate the soil survey data to be sufficient to design And foundation construction. The need to consider costs and time spent in action. To study the nature of the position of the maximum layer depth of holes. Derived from estimates for the distribution of power. Affect the soil to no more than 10 percent (Pressure Increment Is 10 Percent Of Contact Pressure) which is approximately equal to 2 times the length of the foundation from under the base level. Deep down, if the soft soil. That cause problems which need to stake or other use should be drilled to depths down to layer strong enough to get the weight structure.

4. How to penetrate the soil survey.

4.1 Of holes drilled. Drilling size of approximately 4 inch diameter auger to penetrate with a Tripod Rig replacements or puncture the image 4.1 (a) how to penetrate the first to penetrate the 1.00-5.00 m with a Hand Auger and depth down to puncture method using water blown (Wash Boring) until the end of the puncture spot survey We have surveyed the steel casing (Casing) into the soil to prevent soil collapse.

4.2 The soil samples. Continue to collect samples of soil conditions (Undisturbed Sample) layer of soft (Soft to Medium stiff Clay) each phase is done using a 1.50 m some gun shells (Thin Wall Tube) Size 3 inches long, 0.75 meters diameter down to depth. 0.50 meters and then turn off the shaft to penetrate the soil from lack. Soil samples were collected in the head and then seal the end of the cylinder with grease. Continue to maintain moisture to the original image at 4.1 (b) was delivered to the laboratory for testing. The soil samples change image (Disturbed Sample) is done in clay floor (Stiff of Head clay) and sand the floor every 1.50 meters along the test period (Standrad Penetation Test) according to standard ASTM D - 1586 using stored soil cylinder split (Split Spoon) 2 inch diameter at the image 4.1 (c) and Figure 4.1 (d)

4.3 Test Standard Penetration Test (SPT) according to standard ASTM D - 1586 - 87 made every 1.50 m in length Stiff of Head clay test items and the floor, strike action by split cylinder standard Internal diameter 34.9 mm external diameter 50.8 mm (2 inches) to collect soil samples. Using heavy steel plating plummet 63.5 kg (140 frowzy) raised 76 cm high (30 cm) 18 inch length of immersion period is divided into 3 periods per each 6-inch range will be used in recording the number of times to strike the gun knife gravitate to 6 inch gun and knife to strike the lower soil 45 centimeters (12 inches) last SPTN Value is a value per unit of 30 cm samples from the SPT has 2 plastic storage bag to protect floor. evaporation of water.

4.4 The underground water level in wells drilled. Will be measured after complete penetration of the soil survey for a period of not less than 24 hour scale.

4.5 Soil Survey puncture holes in each field will terminate when the penetration depth of exploration as Principal configure Standard Penetration Test (SPT) over 50 Blows / 6 "or more than 100 Blows SPT combined measure in the event of a Partial Increment (value is measured at 100 Blows gun knife strike while the soil is not to sink 18. inch) or one Penetration of soil survey. Soil samples collected and tested SPT.

Soil samples from the soil samples and SPT conditions continue. Was used to test for selection. By the following methods.

4.5.1 Capacity limits for liquid. And plastic limit of soils (Atterberg's Limits Test).
4.5.2 Charge the natural moisture of the soil (Natural Water Content).
4.5.3 Density wet (Wet Unit weight).
4.5.4 Find the size, each grain of soil is sandy soil (Sieve Analysis).
4.5.5 Find the knife are strong clay (Pocket Penetration Test).

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