1.       Examine the quality of the important spare parts: tunnel body, the gear, the main bearing, the rotating bearing and motor

2.       Clean the required spare parts before installation (pay special attention to the composition plane and sliding bearing surface). The spare parts which have already been fixed on the machine must be checked about the chassis before running empty.

3.     Modify the distance between two bearing chassises according to the specific length of tunnel body and size of quill shaft and the distance between the feeding end and the main bearing. Then design the foundation.

4.     The requirements on the design of the foundation

(1)       The distance error not more or less than 3mm between longitudinal and lateral middle line on the basic abutments.

(2)       More or less than 5mm is permitted on the elevation of permanent concrete.

5.     Injection or grouting

(1)   The injection generally adopts the fine gravel concrete or cements magma. The serial number is one higher than the basic concrete at least. When grouting, it should be firm and when firming, the knock on equipment, iron pad and holding down bolts is forbidden in order to avoid affecting the precise installation of the equipment.

(2)Remove the oil stain and dust, and keep the chassis clean before grouting

(3)   The grouting layer should be sticked to the foundation. Therefore, the dust in the holding down bolts should be cleaned.

(4)   Design the anti-pressure strength of grouting layer above 75% of the designed strength.