It is shown that the timbering beforehand methods must be chosen carefully and adjust measures to local conditions. As a result, safe construction and lower cost are ensured.
提出必须因地制宜、灵活地选用预支护方法，达到既保证安全施工，又降低工程造价的目的。
It is shown that the timbering beforehand methods must be chosen carefully and adjust measures to local conditions. As a result, safe construction and lower cost are ensured.
提出必须因地制宜、灵活地选用预支护方法，达到既保证安全施工，又降低工程造价的目的。
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