4results about How to "Avoid excavation" patented technology

The application relates to a replacement construction method of a horizontal tie rod cable of a through tied arch bridge. A permanent tensioning working chamber is designed at the rear end of a main beam horizontal tie rod tensioning area of a bridge abutment, a large-tonnage jack and a temporary support pier are used at the approach bridge end to lift the approach bridge body as a whole to a certain height, and a large and small two sets of winches are arranged at the approach bridge end. The application can realize efficient and safe replacement of the horizontal tie rod under the premise that the abutment back is not dug and the structure of the approach bridge end is not damaged; the construction period is short, the operation is convenient, the cost is controllable, and meanwhile, the construction quality of the tie rod replacement is ensured.

The application discloses a kind of highway reconstruction and expansion new old road embankment joint surface pre-buried grouting reinforcement method, comprising: the position and line of the grouting pipe network to be laid are demarcated on the slope surface after cleaning according to design requirements;Grouting pipe network of grid net structure is laid along the original embankment slope, and grouting guide pipe and grouting valve are installed on the top of grouting pipe network;According to the compaction degree and the rolling thickness of design requirement, fill and compact construction to design elevation layer by layer;Grouting reinforcement;14 days after stopping grouting construction, the grouting reinforcement effect is detected, the grouting guide pipe on the top of embankment is cut off after meeting the design requirements;Finally, the new old embankment joint on the foundation includes original embankment, grid net structure filled with grouting body formed by PVC pipe and expansion embankment;So as to realize the efficient reinforcement of new old embankment joint part.The method can avoid the excavation of soil and rock mixed embankment reconstruction and expansion steps, effectively shorten the construction time and improve the grouting efficiency, and ensure the reinforcement quality.

This invention discloses a method for pre-construction of underground structures in land reclamation projects, comprising the following steps: Prefabrication of underground engineering unit structures: Based on the purpose, load, and functional requirements of the underground project, a main structure is designed and divided into multiple unit structures. Each unit structure is prefabricated according to design conditions, with pre-reserved interfaces for assembly; underwater soft soil reinforcement is carried out on the predetermined area where the underground project will be constructed; the unit structures from step one are floated to the predetermined area and sunk to the predetermined position for assembly to form the main structure; land is formed by filling material outside the assembled unit structures; the fill material inside the unit structures is cleaned and transported out; the walls at the interfaces are removed, allowing the internal spaces of adjacent unit structures to be interconnected; and the upper area of ​​the underground structure is constructed. This method solves the problems of long construction periods, high costs, and high risks associated with traditional underground engineering structures in land reclamation projects.

The present application relates to a kind of horizontal tie rod cable permanent tensioning system of through tied arch bridge and its construction method.The present application includes horizontal tie rod cable tensioning work chamber and personnel access and equipment transport chamber, horizontal tie rod cable tensioning work chamber front end passes through abutment back wall, and is communicated with horizontal tie rod cable tensioning anchorage zone to form integral space;Personnel access and equipment transport chamber are adjacent to the setting of horizontal tie rod cable tensioning work chamber;Personnel access and equipment transport chamber front end passes through abutment back wall, forms passageway;Side door is arranged on the common wall of personnel access and equipment transport chamber and horizontal tie rod cable tensioning work chamber.The present application can realize the permanent construction space of horizontal tie rod stage tensioning, improve construction efficiency and safety;Provide existing operation space for later horizontal tie rod replacement, avoid the need to excavate back due to insufficient space, reduce operation and maintenance cost, significantly shorten the construction period of tie rod replacement.