Hot dip galvanizing materials shall be used in strict accordance with the drawing requirements, with correct dimensions and firm welding joints to achieve the purpose of protection. The guardrail near the foundation pit can make the construction site clean, beautiful, civilized and safe, prevent vehicles from entering and leaving the edge of the foundation pit too close to cause safety accidents, prevent constructors from falling into the foundation pit, prevent debris flow from falling into the foundation pit and cause personal injury to constructors in the foundation pit.

基坑圍護裝置的高度在設備的防護中起著一定的作用?；訃o的高度從根本上決定了臨邊防護欄的設備高度。它是防護欄設計中的一個重要參數，其值的大小直接影響到隔離柵的造價和應用效果。

The height of foundation pit retaining device plays a certain role in the safety protection of equipment. The height of foundation pit enclosure fundamentally determines the equipment height of edge guard. It is an important parameter in the design of protective fence, and its value directly affects the cost and application effect of isolation fence.

選擇屏障高度的主要因素是密度和沿線地形。在《護欄網規范》中，護欄網的高度在1.6～1.8m之間，該規則主要考慮護欄網的高度，其主要設計目的是防止翻車。據觀察，如果有人想進入高速公路，通常采用破壞高速公路護欄的方法。損壞位置在1.2米以下，設置高護欄可防止行人進入，對于的危害性較大，需要考慮基坑的尺寸和澆筑混凝土的數量來適當地澆筑混凝土，以提高護欄邊緣附近基坑的性。

The main factors for selecting the barrier height are density and terrain along the line. In the specification for guardrail, the height of guardrail is between 1.6 ~ 1.8m. This rule mainly considers the height of guardrail, and its main design purpose is to prevent rollover. It is observed that if someone wants to enter the expressway, the method of destroying the expressway guardrail is usually used. The damage location is less than 1.2m, and the high guardrail can prevent pedestrians from entering. It is very harmful to the. It is necessary to properly pour concrete considering the size of the foundation pit and the quantity of concrete, so as to improve the safety of the foundation pit near the edge of the guardrail.

基坑圍護結構的設置應統一規劃，布局布局應，以無障礙道路交通和行人交通為標準。所需出入口應設置單獨的大門，施工現場應與外界隔離?；舆呑o欄不應用于擋土和承重，不應依靠基坑邊護欄堆疊材料。

The setting of foundation pit retaining structure shall be planned uniformly, and the layout shall be safe, taking barrier free road traffic and pedestrian traffic as the standard. Separate gates shall be set at the required entrances and exits, and the construction site shall be isolated from the outside. The guardrail at the side of the foundation pit shall not be used for retaining and bearing, and shall not rely on the guardrail at the side of the foundation pit to stack materials.

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