Abstract
In order to make full use of underground space resources and reasonably determine the development function and scale, it is important to evaluate the suitability evaluation of urban underground space (UUS). The development and utilization of underground space is affected by many factors, such as topography, geomorphology, geotechnical characteristics, hydrogeology and so on. Taking the starting area of Changjiang New Town in Wuhan as a case study, this paper introduces the rough set theory and conditional entropy and establishes a suitability evaluation model of UUS. Rough set theory is used to construct a decision information table, preprocess sample data and classify the knowledge base, while conditional entropy is employed to calculate the attributes’ own and relative importance. Then, the fuzzy comprehensive evaluation method, the most unfavorable grade discrimination method and the exclusive method are used to evaluate the model, and the partition map of regional underground space development suitability is obtained. In this method, any prior knowledge and additional information will not be needed except the sample data, and the obtained weights are more objective and reasonable. The results show that the overall suitability of underground space development and utilization in the starting area of Wuhan Changjiang New Town is good.
Highlights
With the development of the economy, the continuous advance of urbanization and the rapid agglomeration of urban population, current urban development is facing a severe test
The development and utilization of underground space is a complex system of engineering that is affected by many factors, and its reversibility is poor
This paper argues that the attributes of the suitability of underground space (UUS) depend on three types of factors: basic geological conditions, adverse geological phenomena and restricted development zones
Summary
With the development of the economy, the continuous advance of urbanization and the rapid agglomeration of urban population, current urban development is facing a severe test. Youssef et al [13] established the suitability evaluation model of engineering geological conditions by using the analytic hierarchy process. At the present stage, the index weighting method of UUS engineering geological suitability evaluation is relatively simple, mostly using some fuzzy-based approaches, such. UUS engineering geological suitability evaluation is relatively simple, mostly using some fuzzy-based approaches, such as analytic hierarchy process and entropy method, and less ainsvaonlavliyntgicohtiheerrarscuhbyjepcrtoivcesasnadndobejnectrtoivpeywmeeitghhotdin,ganmdeltehsosdins,vsoulvchinagsotthheercosurrbejleacttiiovne amnadotrbixjecmtievtehwodei(gGhutilning methods),[s1u4c],hsaesqtuheenctioarlreslcaotrioinngmmaetrtihxomd e[t1h8o],dp(rGinuclipnaml ecothmopdo) n[1e4n]t, saenqaulyesnitsia[1l 9s]c,oCriRnIgTmICetmheotdho[1d8][,2p0]r,inrociupgahl csoetmtphoeonreynt[2a1n,2a2ly],siestc[.19S]o,,CthReIrTeICarme methanoyd s[2u0b]-, rjeocutigvhitsieest athnedorayn[d2o1m,22n]e,sest,ca. CChhaannggjjiiaanngg NNeeww TToowwnn iiss ssiittuuaatteedd iinn tthhee nnoorrtthheeaasstt ooff WWuuhhaann,, wwiitthh aa ppllaannnneedd ccoonn-ssttrruuccttiioonn aarreeaa ooff aabboouutt 556600 kkmm ((sseeee FFiigguurree 11aa)). TThhee ssttaarrttiinngg aarreeaa ooff CChhaannggjjiiaanngg NNeeww TToowwnn ((sseeee FFiigguurree 11bb)) iiss mmaaiinnllyy llooccaatteedd iinn tthhee CChheennjjiiaajjii--WWuuhhuu aarreeaa,, aanndd iitt iiss aabboouutt 7700 kkmm. ((bb)) TThhee ssttaarrttiinngg aarreeaa ooff WWuuhhaann CChhaannggjjiiaanngg NNeeww TToowwnn. Topographic slope/% C5 Fault/m C6 Seismic basic intensity C7 The depth of confined water roof/m C8 Water inflow of single wellt·d−1 C9 Groundwater corrosion C10 Karst ground collapse C11
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