Grade 1 builder, municipal public works management and practice test paper 2 in 2019 1The design life of cement concrete pavement of urban expressway is (). D.30 2. The structure of the retaining wall shown in the figure below is (). 3. The following statement about the function of cement concrete pavement cushion is incorrect. A. Drainage cushion should be set in soil cutting with poor water-stable geological condition and high moisture of roadbed soil. B. Semi-rigid cushion should be added when uneven settlement of subgrade may occur. C. The width of cushion should be the same as that of subgrade, and the minimum thickness should be 150 mm. D. Antifreeze cushion and drainage cushion should be made of sand, gravel and other granular materials. 4Whether the strength of the original cement pavement meets the requirement of asphalt overlay on cement concrete pavement or not, the evaluation results should be given by () and the reinforcement plan should be put forward. C. Design Unit 5The following statement about pre-tensioned construction is incorrect. A. The anti-overturning coefficient of tensioned pedestal shall not be less than 1.5 B. When multi-tendons are tensioned at the same time, the initial stresses of each tendon should be the same. C. Cement dosage in concrete should not be more than 550 kg/m3 Port grouting belongs to post-tensioning construction. 6When the new and old bridges are connected by the superstructure and the lower structure is separated, the following statement (). A. Articulated connection should be used for the splicing of new and old beams and slabs of reinforced concrete solid slab bridges. B. Articulated connection is suitable for splicing between old and new beams of prestressed reinforced concrete hollow slab bridge. C. The rigid connection should be used for the splicing of the new and old Tbeams. D. Continuous box girder bridge, articulated connection is suitable for splicing between old and new beams and slabs. 7When concrete piles are stacked in the site, the maximum stacking height is () layer. C.4 8In the construction of bored cast-in-place piles, the equipment for inserting reinforcing steel cages into the design depth of piles after pressure grouting concrete is (). C. Long Spiral Drill 9The following is wrong about the characteristics of various enclosure structures. A. Concrete cast-in-place piles have high stiffness, little impact on the environment during construction, and need to adopt dewatering or water stopping measures. B. SMW Pile has high strength, profile steel can be used repeatedly, and it needs to adopt precipitation or water stopping measures. C. The diaphragm wall has high strength and stiffness, is suitable for wide strata, good water resistance and can be used as part of the main structure. D. Steel pipe pile section stiffness is greater than steel sheet pile, waterproofing measures should be taken. 10In soft soil foundation, when the surrounding environmental protection requirements are high, the passive soil in the foundation pit should be reinforced before the construction of the foundation pit, so as to improve the resistance of the passive soil and reduce the deformation of the retaining structure during the excavation of the foundation pit.The end wells of metro stations are usually used (). D. Grille Reinforcement 11The structural form of metro tunnels constructed by open-cut method is usually (). A. Rectangular section 12The following statement about the rectangular unit combined pool is incorrect. A. The reinforcing bars in the pool are tied up at one time, but they need to be disconnected at the post-pouring zone and not cut off at the joint zone. B. After 42 days of curing the concrete on both sides of the post-pouring belt, the post-pouring belt concrete will be poured. C. Strength of concrete in post-poured zone should be increased by one grade than that of concrete on both sides. D. Maintenance time of post-pouring strip is not less than 14 days 13On the construction measures of cast-in-situ wall slab joint concrete of prefabricated installation pool (). A. Strength should be increased by one level compared with prefabricated panels B. It is advisable to adopt micro-expansive concrete C. The inner die of the wall joint should be installed to the top at one time, and the outer die should be divided into sections and supported by pouring. The pouring time should be selected according to the temperature and concrete temperature when the joint widt