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• Time of issue:2020-09-10 14:33
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(Summary description)The characteristics of the mud-water balance jacking pipe about the relay room The relay room in the machine is a closed ring room for long-distance pipe jacking, used at the top of the section, and then in the middle of the pipe section. Steel is generally used, and jacks are set along the pipe ring. The advantage of the relay room in the machine can shorten the length of large sections and reduce the number of jacks and backs. It is difficult for the top of the culvert body to be divided into two by using the top between the relays. During the jacking process, it is not easy. The two tracks overlap the center of gravity, and the section and offset between the sections rotate relative to each other. For continuity, when two adjacent jackings must be The part between the relay is set to cut wedges or steel towers, the steel towers or will be sheared and wedged at the same time; the required number: I-beam type, the number and diameter of U-bolts, and its size is determined by the shear definite. 1. The characteristics of the mud-water balance jacking pipe in the relay room The relay process between the relay room should not exceed 20 cm. The top stroke will generally lead to increased shear, difficult shear wedge and other facilities. 2. The steel sheath is designed to prevent some soil from intruding into a box. Therefore, the width of the plate is determined by the extension of the jack and the overlap of 15 cm, so that the soil structure cannot be directly invaded. 3. The desired number of top edges determined by the jack size. 4. The end of the box structure bottom plate of the forward section of the relay room will be cut off according to the use of steel bars. The jack will be placed in the jack for jacking. After the jacking is completed, the cut steel bars will be welded and the concrete will be poured. Restore and original appearance of the cabinet. The jack is mainly placed on the bottom of the box culvert, and the top wall is built at the end of the bottom of the foundation. The different sizes of the top wall section and the number of shear steel bars to be placed are determined by the calculation results according to the jacking force, and the top wall is chiseled off after jacking. 5. At the joints between the relays, the connection of the waterstop is very important. The uneven settlement of the structure often leads to failure of the joint waterstop. Therefore, it is best to reserve a gap and set up a rubber waterstop, so that the waterstop can not only stop the water but also meet the settlement requirements of the structure. 6. The characteristics of the mud-water balance jacking pipe about the relay room. When prefabricating the main structure, bolts should be pre-embedded, holes and slots should be reserved, steel sleeve bottom plate should be set, and the top wall should be poured or mattock nests should be reserved.