Research On Old City Renewal Strategy Based On Urban Historical Landscape Catalys

With the continuous promotion of the national high-quality development strategy,urban construction has changed from "incremental" expansion to "stock" renewal.In the process of old city renewal,it is often the quickest way to generate economic benefits by overthrowing and rebuilding the original spatial elements that are not suitable for contemporary society,but it is also accompanied by the neglect of urban history and culture.For cities with outstanding universal historical value such as historical and cultural cities,relevant researchers and urban decision makers have paid more attention to their cultural protection.However,in the face of more common historical cities,they have the characteristics of less historical remains and less prominent cultural characteristics.Their construction and development often adopt the renewal method that can obtain rapid benefits,and they pay insufficient attention to their historical and cultural values.Short-term economic benefits bring about the rupture of historical context and the style of a thousand cities,which cannot achieve sustainable and stable development.Based on the analysis of the deep-seated problems in the renewal of general historical cities,the theories of "urban catalyst" and "urban historical landscape" are introduced and deeply studied,and the applicability of urban historical landscape catalyst and the renewal of old cities is discussed,and the framework of old city renewal method based on historical landscape catalyst is further put forward.Taking Jiyang old city as an example,the method is applied and the renewal strategy is put forward.The main conclusions are as follows:(1)The catalyst of urban historical landscape is suitable for the deep problems existing in the old city renewal,and has the following corresponding relationship.(1)Planning the whole problem: the historical landscape pays attention to the overall correlation of elements,and the catalyst system emphasizes the hierarchy of the system.The combination of the two can strengthen the connection between the local and the whole;(2)Rough transformation: the principle of catalyst structure continuity and the principle of local small amount protect urban texture,and the study of the relationship between historical landscape and dynamic elements is helpful to solve the deep root of the problem;(3)Public participation: paying attention to public cognition in historical landscape is beneficial to the improvement of resources,and paying attention to public suggestions in catalytic process can increase the rationality of decision-making;(4)Context inheritance: Stratification analysis of historical landscape can fully identify the historical and cultural elements of the study area,thus laying a good foundation for its protection and utilization.(2)The framework of old city renewal method based on historical landscape catalyst is constructed.The specific content includes six steps: the identification and value correlation of urban historical landscape elements,the analysis of problems and needs in the research area,the selection of catalyst categories based on problems and needs,the classification of catalyst categories,the shaping of catalyst elements at all levels,and the control and guidance of catalyst effects.(3)The old town of Jiyang is selected as the empirical research object to apply the method,which mainly includes the following contents.(1)On the basis of full literature review and combing,combined with on-the-spot investigation and public investigation,the historical landscape elements of Jiyang Old Town are identified and classified,and it is concluded that they mainly have four types of value characteristics: ecological service value,historical and cultural value,urban function value and life activity value;(2)Based on the analysis and summary of the current situation of the old city,historical landscape elements with corresponding value categories are selected as catalyst carriers;(4)classify the catalyst categories into catalyst points,catalyst fields,catalyst veins and catalyst nets;(5)Systematize all kinds of catalysts;(6)Put forward measures to control and adjust the catalytic effect.