A construction method of non-excavation pipe jacking prestressed beam

Abstract

The invention discloses a construction method of a non-excavation top pipe pre-stress beam. The construction method comprises the sequentially-executed steps of concrete top pipe construction, steel top pipe construction, pre-stress system construction, anchor bearing plate mounting and pre-stress tendon tensioning, pre-stress beam forming through concrete top pipe interior pouring, and connectionof the pre-stress beam and an earthen ruin foundation bearing table. On the basis of ensuring that pre-stress beam construction meets construction requirements, destruction of an excavation-type construction mode on ruin soil bodies is reduced, it is effectively ensured that the ruin soil bodies are complete, the good conditions are created for protection and research work of ruins, the influences of excavating a large amount of earthwork on the aspects such as earthwork transportation and dust raising pollution are reduced, and the impact on the environment is lowered.

Description

technical field [0001] The invention relates to the technical field of pipe jacking prestressed beam construction in ancient buildings, antique buildings and non-excavation foundations, in particular to a non-excavation type pipe jacking prestressed beam construction method. Background technique [0002] At present, with the continuous development of our country's economy and the continuous progress of social civilization, people's awareness of the protection of cultural heritage is becoming more and more obvious, and the protection of cultural relics has gradually received great attention from all walks of life. Protect your position among the top priorities. Among them, such as figure 1 As shown, in the foundation construction of site protection, the construction of prestressed beams as the foundation of the entire construction is particularly important. Prestressed beams are mainly composed of concrete beams and the prestressed system inside the concrete beams. However,...

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Problems solved by technology

Prestressed beams are mainly composed of concrete beams and the prestressed system inside the concrete beams. However, the following problems often exist in the construction of prestressed beams for the protection of large ruins: 1) The large ruins have a large area and are very difficult to protect. The main reason is that the conventional structure The foundation construction of cultural relics protection buildings cannot meet the requirements of site protection; 2) Foundation construction is often accompanied by a large amount of earthwork excavation. If there are conditions that do not allow excavation such as cultural relics, traffic roads, etc., it will greatly affect the construction progress of the project , and now the control of dust control is strict, and the transportation of earthwork is difficult, resulting in temporary stacking in the site affecting the site turnover and construction from time to time

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