Katangar tari na secant wani nau'i ne na tari na ramin tushe. Ana yanke tulin simintin da aka ƙarfafa da kuma tulin siminti na fili, sannan a shirya tudu don samar da bangon tulin da ke cuɗanya da juna. Za'a iya canza ƙarfin ƙarfi tsakanin tari da tari zuwa wani matsayi, kuma yayin da yake riƙe ƙasa, zai iya taka rawar da ya dace na dakatar da ruwa, kuma ya dace da amfani da shi a wuraren da ke da girman matakin ruwa na ƙasa da kunkuntar wuri.
Zane na secant tari bango
A ka’ida, saboda tulin simintin simintin da ke kusa da shi da kuma ƙulla shingen shinge na siminti don samar da bango, tulin simintin simintin da aka ƙarfafa yana yin tasirin haɗin gwiwa lokacin da bangon tari ya lalace kuma ya lalace. Don ƙarfafa tari na kankare, kasancewar takin simintin siminti yana ƙara ƙanƙarar sa, wanda za'a iya la'akari da shi ta hanyar taurin kai daidai lokacin da aka samu.
Duk da haka, binciken wani aiki mai amfani ya nuna cewa gudunmawar gudunmawar da aka samu ga taurin simintin simintin ya kai kusan kashi 15% kawai tare da bayyanar fashe a ƙasan tono. Sabili da haka, lokacin da lokacin lanƙwasawa ya yi girma, ba za a iya la'akari da taurin simintin siminti ba; Lokacin da lokacin lanƙwasawa ya ƙanƙanta, ana iya yin la'akari da gudummawar taurin kai na tari na siminti da kyau lokacin da ake ƙididdige nakasar layin tari, kuma za'a iya ninka taurin tari mai ƙarfi ta hanyar haɓaka haɓaka mai ƙarfi na 1.1 ~ 1.2.
Gina bangon tari na secant
An jefa tari na fili tare da siminti mai ɗorewa a gaba. An yanke sashin siminti mai tsaka-tsaki na tulin simintin da ke kusa da shi ta hanyar yankan iyawar injin ɗin kafin a fara saitin simintin simintin, sannan a zuba tulin naman don gane faɗuwar takin da ke kusa.
Tsarin ginin katangar tari guda ɗaya shine kamar haka:
(a) Gadi rawar jiki a wurin: Lokacin da bangon jagorar yana da isasshen ƙarfi, yi amfani da crane don matsar da rawar sojan a wurin, kuma sanya tsakiyar babban mai riƙe bututun mai masauki a tsakiyar ramin bangon jagora.
(b) Samuwar rami guda ɗaya: Tare da latsa sashin farko na silinda mai kariya (zurfin 1.5m ~ 2.5m), guga na arc yana ɗaukar ƙasa daga silinda mai kariya, ya kama ƙasa yayin da yake ci gaba da danna ƙasa har zuwa na farko. An danna sashe cikakke a ciki (yawanci barin 1m ~ 2m a ƙasa don sauƙaƙe haɗin silinda) don gano ainihin. Bayan ƙetare gwajin, an haɗa silinda mai kariya ta biyu, da sauransu akan sake zagayowar har sai da matsa lamba ya kai ƙirar ƙira ta ƙasa.
(c) Ɗaukaka kejin ƙarfe: Don tari B, ya kamata a sanya kejin ƙarfafawa bayan binciken rami ya cancanta. A wannan lokacin, haɓakar kejin ƙarfafa ya kamata ya zama daidai.
(d) allurar kankare: Idan akwai ruwa a cikin rami, wajibi ne a yi amfani da hanyar allurar da ke karkashin ruwa; Idan babu ruwa a cikin rami, yi amfani da hanyar busassun ramin ramin kuma kula da rawar jiki.
(e) Drum ja a cikin tari: yayin da ake zubar da kankare, fitar da silinda na kariya, kuma a kula da kiyaye kasan gangunan kariya ≥2.5m ƙasa da simintin.
Tsarin ginin layin tuli shine kamar haka:
Don jeri na occluding tara, tsarin ginin shine A1 → A2 → B1 → A3 → B2 → A4 → B3 , da sauransu.
Maɓallin maɓalli masu ƙayatarwa:
Ƙayyadaddun lokacin jinkirin kankare na tari A yana buƙatar ƙididdige lokacin jinkirin kankare na tari A bisa ga tsari mai zuwa bayan kayyade lokacin t da ake buƙata don samuwar tari guda A da B:
T=3t+K
Formula: K - lokacin ajiyewa, gabaɗaya 1.5t.
A cikin tsarin samuwar tari na B, saboda simintin tari A bai gama kafu ba kuma yana cikin yanayin A mai gudana, yana iya garzaya cikin ramin tari B daga mahadar tari A da tari B, ya zama “ bututun ruwa". Matakan cin nasara sune:
(a) Sarrafa slump na tari A 14cm.
(b) Za'a saka kwandon aƙalla 1.5m ƙasa da ƙasan ramin.
(c) Duba ko saman simintin saman tari A ya nutse cikin ainihin lokaci. Idan an sami raguwa, to ya kamata a dakatar da tono tari B nan da nan kuma yayin danna ƙasa da silinda kariya gwargwadon yiwuwa, cika ƙasa ko ruwa a cikin tari B (daidaita matsi na kankare na tari A) har sai “bututun bututu” ya kasance. tsaya.
Sauran matakan:
Lokacin cin karo da cikas a karkashin kasa, saboda katangar tari na secant ta ɗauki kwandon ƙarfe, ma'aikacin na iya ɗaga ramin don kawar da cikas lokacin da aka tabbatar cewa muhallin yana da aminci.
Yana yiwuwa a ɗauki kejin ƙarfe da aka sanya lokacin da za a fitar da tulin tulin sama. M matakan za a iya zabar don rage barbashi size na kankare tara post B ko wani bakin ciki karfe farantin dan kadan karami fiye da kanta za a iya welded zuwa kasa na karfe kejin ƙara ta anti- iyo iyawa.
A lokacin da gina secant tari bango, ya kamata mu ba kawai la'akari da jinkirin saitin lokaci iko na bayyana kankare tari, kula da yi lokaci tsari na m bayyana kankare da kuma karfafa kankare tari, amma kuma sarrafa a tsaye mataki na tari, ta yadda za a hana ƙwaƙƙarfan tulin simintin da ba za a iya gina shi ba saboda yawan ƙarfin ƙarfin simintin. Ko saboda kammala bayyana kankare tari perpendicularity sabawa ne babba, sakamakon halin da ake ciki na matalauta bonding sakamako da ƙarfafa kankare tari, ko da tushe rami yayyo, ba zai iya dakatar da ruwa da kuma gazawar. Don haka, ya kamata a yi tsari mai ma'ana don gina katangar tulwicin, sannan a yi bayanan gine-gine don sauƙaƙe aikin ginin. Domin sarrafa ramin kafa daidaito na occluding tari don saduwa da bukatun na zane da kuma alaka dalla-dalla, da dukan tsari kula da rami kafa daidaito ya kamata a soma. Za a iya rataye ginshiƙan layi guda biyu akan na'ura mai ƙira don sarrafa madaidaicin bangon waje na silinda kariya ta kudu-arewa da gabas-yamma kuma za'a iya amfani da clinometer guda biyu don bincika perpendicularity na rami. Gyara da daidaitawa ya kamata a yi a lokacin da aka sami sabani.
Kama da gina karkashin kasa m bango, domin gina cikakken casing secant tari bango, shi ma wajibi ne don yin jagora bango kafin hakowa a cikin tari, wanda ya gamsu da iko da jirgin matsayi na hakowa occlusive tari da kuma bauta a matsayin. wani dandali na injinan gini don hana ramin rugujewar, tabbatar da tulin katangar bangon tari na secant tari, da kuma tabbatar da aiki mai santsi na aikin tulin tulin. Ana iya ganin buƙatun ginin bangon jagora a cikin abubuwan da suka dace na bangon diaphragm na ƙasa.
Lokacin aikawa: Nuwamba-17-2023