Construction shaft construction is a kind of durable structure. The shaft construction adopts shotcrete lining method + grid structure + steel mesh support + waterproof membrane + cast-in-place reinforced concrete. Horse construction shaft seals the door head at the bottom, the upper layer of the pipe before grouting, the upper layer of the reinforced concrete, the upper layer of the barbecue horse head door, the upper layer of the reinforced concrete, the lower part of the reinforced concrete, and the lower part of the horse and the lower part of the concrete under the steel frame under the grid.

　　前期采用直径32-50mm的钢管进行小管灌浆，对管端和管孔进行特殊处理。在排水管前面用风钻钻这个洞。两排之间的距离为30cm，呈扇形，高度为5-8度。管道长度2.25米，注浆为单液(水泥浆)或双液(水泥浆)。根据土壤质量调整注浆压力。

　　In the early stage, the steel pipe with diameter of 32-50mm is used for small pipe grouting, and the pipe end and pipe hole are specially treated. Drill the hole with an air drill in front of the drain. The distance between the two rows is 30cm, fan-shaped, with a height of 5-8 degrees. The length of the pipeline is 2.25m, and the grouting is single liquid (cement slurry) or double liquid (cement slurry). Adjust grouting pressure according to soil quality.

　　格栅钢构件制造设备制造，格栅钢构件制造适用于地下隧道衬砌制造。钢格栅是由钢和钢构成的钢框架。钢格栅是由组合钢格栅(螺栓和焊接)组成。钢拱结构是喷射混凝土结构，是软弱地层中应用隧道结构更有效的方法。

　　The equipment manufacturing of grid steel members is applicable to the lining manufacturing of underground tunnel. Steel grilles are steel frames made of steel and steel. Steel grating is composed of combined steel grating (bolt and welding). Steel arch structure is shotcrete structure, which is the most effective method to apply tunnel structure in soft stratum.

　　在动力隧洞施工过程中，初始衬砌施工是18字施工规范中的强支护规范。初始衬砌施工是保证隧道施工和施工的基础。

　　In the process of power tunnel construction, the initial lining construction is the strong support specification in the 18 word construction specification. The initial lining construction is the foundation to ensure the tunnel construction and construction safety.

　　初始衬砌注浆体系不完善，注浆混凝土(含拱)不完善。由于混凝土凝结和喷发效率低，土体与混凝土之间存在缝隙。因此，有必要进行不适当的注浆、充填孔隙。注浆压力(0.2-0.4Mpa)通常表示为水泥浆体。

　　The initial lining grouting system is not perfect, and the grouting concrete (including arch) is not perfect. Due to the low efficiency of concrete setting and eruption, there is a gap between soil and concrete. Therefore, it is necessary to carry out improper grouting and filling of pores. Grouting pressure (0.2-0.4mpa) is usually expressed as cement paste.