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26年注安建筑真题解析第⑫ 题(基坑坡比)

  • 2026-11-07 15:17:42
26年注安建筑真题解析第⑫ 题(基坑坡比)
【真题12】某建筑工程在硬塑黏性土地层中采取自然放坡方式开挖基坑(长6m、宽5m、深4m)。该基坑上口宽度最小值是
(    )。
A.   9m     B.   11m   C. 13m   D. 15m
根据《建筑施工土石方工程安全技术规范》:  坡高小于5m时，硬塑黏性土自然放坡坡率允许值为1:1.00~1:1.25。计算上口宽度最小值时，应取最陡允许坡度1:1.00。
       基坑上口宽度=底宽+2X(开挖深度X坡度系数)=5+2X(4X1.00)=13m。
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二年级上册语文期中复习十类真题汇总

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  1. CONNECT:[ UseTime:0.000714s ] mysql:host=172.18.0.4;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000840s ]
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  6. SELECT * FROM `set` [ RunTime:0.000299s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000594s ]
  8. SELECT * FROM `article` WHERE `id` = 539982 LIMIT 1 [ RunTime:0.000366s ]
  9. UPDATE `article` SET `lasttime` = 1794081578 WHERE `id` = 539982 [ RunTime:0.001541s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000337s ]
  11. SELECT * FROM `article` WHERE `id` < 539982 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000466s ]
  12. SELECT * FROM `article` WHERE `id` > 539982 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000423s ]
  13. SELECT * FROM `article` WHERE `id` < 539982 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000677s ]
  14. SELECT * FROM `article` WHERE `id` < 539982 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000641s ]
  15. SELECT * FROM `article` WHERE `id` < 539982 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001014s ]
0.091482s