某高層框架辦公樓基坑支護(hù)工程摘要目錄_secret

1、基坑工程設(shè)計(jì)摘 要擬建工程，地面以上6層，地下2層?？偨ㄖ娣e69533m2，其中地上建筑面積為54330 m2，地下建筑面積為15203m2，建筑±0.00相當(dāng)于絕對(duì)標(biāo)高17.25m，基坑開挖深度8.50m。結(jié)合本工程地質(zhì)、環(huán)境、挖深等諸多因素確定安全可靠的支護(hù)方案；為基坑土方開挖和地下室施工創(chuàng)造一個(gè)安全干燥的施工環(huán)境；考慮到鄰近坑邊有建筑和道路（下設(shè)有水、電、氣等管線），為確保安全，以“變形”控制設(shè)計(jì)。本著“安全可靠、經(jīng)濟(jì)合理、技術(shù)可行、施工方便”原則，整個(gè)基坑采用一排鉆孔灌注樁作擋土結(jié)構(gòu), 一道鋼筋混凝土支撐作為支撐結(jié)構(gòu)體系?；游鱾?cè)和北側(cè)坳溝、暗塘處采用深層攪拌樁作止水帷幕。

2、基坑內(nèi)采用集水坑排水。關(guān)鍵詞：深基坑 支護(hù)結(jié)構(gòu) 擋土結(jié)構(gòu) 鋼筋混凝土支撐 鉆孔灌注樁 The design for foundation pit of national microstructure laboratory in Nanjing UniversityAbstract The building of national microstructure laboratory in Nanjing University to be proposally constructed is 6-layer tall, including 2 basements. Its general const

3、ruction area is 69533 square meters, containing 54330 square meters above the ground surface and 15203 square meters below the ground surface. The average level of the construction for 0.00, absolute level is 17.25 meters. The depth of excavation is 8.5 meters.Considering of the geologic environment

4、, excavation depth of the foundation pit, to create an safe and dry surroundings for the earth work and basement, we carry out the design in control of displacement deformation, in order to keep the main traffic roads and buildings safe and to arrange pipelines of water, electricity and coal gas bel

5、ow the surface. According with fundamental technical standard, approaching safe reliability, the economical-reasonable and convenient construction and guaranteeing project time limit，we use nondisplacement piles as retaining structure, reinforced concrete bracing as bracing structure.In the western

6、and northern parts of the foundation pit, we use deep churning piles as detaining water pile construct enclosed cut off trench. With the purpose of dewatering, we use sump.Key words: Foundation pit; Bracing structure; Retaining structure; Reinforced concrete bracing; Nondisplacement pile目 錄第一章 設(shè)計(jì)方案綜

7、合說明1.1 概述11.1.1工程概況11.1.2基坑周邊環(huán)境條件11.1.3工程水文地質(zhì)條件11.1.4基坑側(cè)壁安全等級(jí)及重要性系數(shù)21.2 設(shè)計(jì)總說明21.2.1設(shè)計(jì)依據(jù)21.2.2支護(hù)結(jié)構(gòu)方案21.3 基坑監(jiān)測(cè)3第二章 基坑支護(hù)結(jié)構(gòu)設(shè)計(jì)計(jì)算書2.1 設(shè)計(jì)計(jì)算42.1.1地質(zhì)計(jì)算參數(shù)42.1.2計(jì)算區(qū)段劃分42.1.3計(jì)算方法42.1.4土壓力系數(shù)計(jì)算42.2 ABC段支護(hù)結(jié)構(gòu)設(shè)計(jì)計(jì)算52.2.1土層分布52.2.2土層側(cè)向土壓力計(jì)算52.2.3土壓力合力及作用點(diǎn)的計(jì)算72.2.4支撐軸力計(jì)算72.2.5樁長(zhǎng)計(jì)算72.2.6最大彎矩計(jì)算82.2.7拆撐計(jì)算82.2.8配筋計(jì)算82.3 CD

8、EF段支護(hù)結(jié)構(gòu)設(shè)計(jì)計(jì)算92.3.1土層分布92.3.2土層側(cè)向土壓力計(jì)算92.3.3土壓力合力及作用點(diǎn)的計(jì)算102.3.4支撐軸力計(jì)算112.3.5樁長(zhǎng)計(jì)算112.3.6最大彎矩計(jì)算112.3.7拆撐計(jì)算122.3.8配筋計(jì)算122.4 FGHA段支護(hù)結(jié)構(gòu)設(shè)計(jì)計(jì)算122.4.1土層分布122.4.2土層側(cè)向土壓力計(jì)算122.4.3土壓力合力及作用點(diǎn)的計(jì)算142.4.4支撐軸力計(jì)算142.4.5樁長(zhǎng)計(jì)算152.4.6最大彎矩計(jì)算152.4.7拆撐計(jì)算152.4.8配筋計(jì)算162.5 支撐結(jié)構(gòu)設(shè)計(jì)計(jì)算162.5.1支撐軸力162.5.2支撐彎矩計(jì)算162.5.3初始偏心距172.5.4是否考慮偏心矩增大系數(shù)172.5.5配筋計(jì)算172.5.6整體穩(wěn)定性驗(yàn)算172.5.7聯(lián)系梁172.6 圈梁設(shè)計(jì)計(jì)算182.6.1 ABC段圈梁設(shè)計(jì)計(jì)算182.6.2 CDEF段圈梁設(shè)計(jì)計(jì)算182.6.3 FGHA段圈梁設(shè)計(jì)計(jì)算182.6.4是否考慮偏心矩增大系數(shù)192.7 立柱強(qiáng)度計(jì)算19 2.7.1上段鋼立柱325´10鋼管19 2.7.2下段鋼筋砼立柱強(qiáng)度驗(yàn)算202.8 基坑止降水設(shè)計(jì)20 2.8.1止水樁長(zhǎng)確定20 2.8.2基坑止水