Large foundation pits even use methods such as underground continuous walls and column type bored pile interlocking to prevent the collapse of the outer soil layer; For those who are not affected by nearby construction, the well point method can be used to lower the groundwater level, and slope excavation can be used; In cold regions, natural cold gas freezing method can be used for excavation, and so on.

關于跨越必定規劃的危險性較大的分部分項工程，施工單位應當組織對專項方案進行證明?；幼o欄由防護網片和立柱組成?；訃鷵踝o欄防護網片由2cm×4cm方管焊接組成。

The construction unit should organize experts to prove the special plan for high-risk sub projects that cross certain planning. The foundation pit guardrail is composed of protective mesh and columns. The protective mesh of the foundation pit fence is made of 2cm × Composed of 4cm square tube welding.

單片規范1.1米×1.7米，兩端設有跨耳用Φ10螺栓與立柱聯接固定，每個法蘭盤設4個螺栓孔、頂部封閉，與地上用Φ14膨脹螺栓固定。

Monolithic specification 1.1 meters × 1.7 meters, with cross ear use at both ends Φ 10 bolts are connected and fixed to the column, and each flange is equipped with 4 bolt holes and the top is closed, which are used to connect with the ground Φ Fix with 14 expansion bolts.

設備后，護欄上邊與立柱平齊，下邊距地上20cm,兩立柱間隔2米。所運用原資料均選用規范資料，制作嚴峻按圖施工，規范正確，焊接點健壯，抵達防護之目的。

After the equipment is installed, the upper edge of the guardrail is flush with the column, and the lower edge is 20cm above the ground, with a distance of 2 meters between the two columns. All the raw materials used are selected from national standard materials, which are strictly constructed according to the drawings, with correct specifications and robust welding points, achieving the purpose of safety protection.

基坑護欄網分類：通用版、規范版(定制)(不同版其他產品首要差異在于資料厚度不同，運用年限不同) 產品承重：400kg基坑護欄網色彩：首要有黃黑相間、紅白相間兩種。具體的可按照客戶要求定做。

Classification of foundation pit guardrail net: universal version, standard version (customized) (the main difference between different versions of other products is the thickness of the data and the service life.) Product weight: 400kg. Foundation pit guardrail net color: mainly available in yellow black and red white. Specific products can be customized according to customer requirements.

基坑護欄利益1.精巧美麗：選用現在調頻無縫焊接技術，使焊接點無瑕;抗性好：不怕磨損、不怕雨淋、抗老化。靈活性：工程結束可拆卸重復使用。

Foundation pit guardrail benefits 1. Exquisite and beautiful: using current frequency modulation seamless welding technology, making the welding points perfect and flawless; Good resistance: no fear of wear, rain and aging. Flexibility: Removable and reusable at the end of the project.

基坑護欄網效果：分隔功用 、 阻擋功用 、 警示功用基坑護欄網運用規模：修建施工現場電梯井口防護、臨邊防護，也廣泛用于配電檢修、電氣檢修、改建施工、交通、公司設置警戒線及其它留步場所等。

Effect of foundation pit guardrail network: separation function, blocking function, warning function. Application scale of foundation pit guardrail network: construction site elevator wellhead safety protection, edge safety protection, also widely used for power distribution maintenance, electrical maintenance, renovation construction, transportation, company warning lines and other places to stay.