本论文的研究内容和结论为：（1）对开裂后的“K48+800高填方盖板涵

Contents and conclusions of this paper are: <br>(1) to "K48 + 800 high fill culvert" project after cracking using drilling, engineering geology tone painted interior and comprehensive means of testing geological survey, the conclusion is: culvert area site as a whole more stable, but due to the higher fill, culverts need to be processed. Recommendations adopted to broaden the base form of culverts. <br>(2) the theoretical cracking culvert works and the proof stress analysis using software modeling Midas stress and deformation analysis, uneven ground settlement is the direct cause of the culvert failure. <br>(3) the crack settlement observation culvert walls and ceiling, according to the size and rate of settlement, ground consolidation obtain substantially complete, the foundation is in a stable state, the work can be carried out next Treatment. <br>(4) the main reason for the high fill culvert cracking include design, construction and maintenance in three aspects. <br>(5) Treatment Measures high fill culvert cracking typically comprises a foundation reinforcement, built lining, crack prevention. To "K48 + 800 high fill culvert" project, according to its causes cracking, reference works similar punishment measure, combined with the actual situation of the project, proposed a different punishment project, a program in terms of safety, cost, duration and other preliminary comparison . Reinforcement of the selected program uses Midas software modeling carried stress and deformation analysis to determine the final program. <br>(6) After the reinforcement project is completed, the reinforcement effect culverts were evaluated on-site survey data to show where governance measures are feasible. <br>Finally, from the perspective of prevention of high fill culvert cracking disease starting from proposals design, construction and maintenance aspects, with a view to similar projects.

The research content and conclusions of this paper are:<br>(1) After the cracking of the "K48-800 high-fill cover cover culvert" project using drilling, engineering geological mapping and indoor testing and other comprehensive means of geological survey, the conclusion is: culvert area site is more stable overall, but due to the higher filling, the culvert foundation needs to be processed. It is suggested that the basic form of culvert should be adopted to expand the foundation.<br>(2) The theoretical force analysis and the use of Midas software to model the force and deformation analysis of the cracking cover culvert project, the uneven foundation settlement is the most direct reason for the culvert cracking.<br>(3) The cracking cover culvert body and the top plate for settlement observation, according to the size and rate of settlement, it is concluded that the foundation solidity is basically completed, the foundation is in a stable state, the next step can be carried out.<br>(4) The main reasons for the opening of the culvert of the high-fill edg cover include three aspects: design, construction and maintenance.<br>(5) The treatment measures for the cracking of the culvert of the high-fill edgcover plate usually include the foundation reinforcement, the built-in lining, and the treatment of cracks. For the "K48-800 high-fill cover cover culvert" project, according to its cracking causes, reference to similar Agency measures, and combined with the actual situation of the project, put forward different administrative solutions, from the safety, cost, duration and other aspects of the initial selection of the program. The selected reinforcement scheme is used to model the Midas software for force and deformation analysis to determine the final scheme.<br>(6) After the completion of the reinforcement project, the reinforcement effect of the culvert is evaluated, and the on-site survey data prove that the measures are feasible.<br>Finally, from the point of view of preventing the occurrence of cracking disease in the high-fill cover slab, the proposal sought from the design, construction and maintenance is put forward, with a view to serving as a reference for similar projects.

The research contents and conclusions of this paper are as follows:<br>(1) For the cracked "K48 + 800 high fill slab culvert" project, drilling, engineering geological mapping, indoor testing and other comprehensive means are used for geological exploration. The conclusion is that the site in the culvert area is generally stable, but the culvert foundation needs to be treated due to the high filling. It is suggested that the culvert foundation should be enlarged.<br>(2) For the cracked slab culvert project, theoretical stress analysis and checking calculation are used, and Midas software is used to model stress and deformation analysis. Uneven foundation settlement is the most direct cause of the culvert cracking.<br>(3) Based on the settlement observation of the wall body and roof of the cracked slab culvert, according to the settlement amount and rate, it is concluded that the consolidation of the foundation is basically completed and the foundation is in a stable state, then the next treatment work can be carried out.<br>(4) The main reasons for cracking of high fill slab culvert include design, construction and maintenance.<br>(5) The treatment measures for cracking of high fill slab culvert usually include foundation reinforcement, internal lining and crack treatment. For K48 + 800 high fill slab culvert project, according to the causes of its cracking, referring to the treatment measures of similar projects, and combining with the actual situation of the project, different treatment schemes are proposed, and the schemes are preliminarily compared and selected from the aspects of safety, cost and construction period. Midas software is used to analyze the stress and deformation of the selected reinforcement scheme to determine the final scheme.<br>(6) After the completion of the reinforcement project, the reinforcement effect of the culvert is evaluated, and the field investigation data prove that the treatment measures are feasible.<br>Finally, from the point of view of preventing the cracking of high fill slab culvert, some suggestions are put forward from the aspects of design, construction and maintenance, in order to serve as a reference for similar projects.<br>