基坑護(hù)坡工程施工方案.doc

基坑護(hù)坡工程施工方案

    擬建北京×工程，位于北京市××區(qū)，東臨××路，南臨××。本工程A、B、E座地上××層，C1、C2、C3座地上×層，全現(xiàn)澆剪力墻結(jié)構(gòu)。4層框架結(jié)構(gòu)綜合樓，均設(shè)2層地下室。自然地面標(biāo)高為36.30米，±0.00標(biāo)高為37.50米，基礎(chǔ)埋深約6.00米。    ’
因施工現(xiàn)場狹窄，為保證周邊建(構(gòu))筑物的安全和基礎(chǔ)施工的順利進(jìn)行，須對(duì)基坑進(jìn)行有效支護(hù)。
本場地工程地質(zhì)性質(zhì)詳見《工程地質(zhì)勘察報(bào)告》
2、基坑護(hù)坡設(shè)計(jì)方案
2.1  設(shè)計(jì)依據(jù)
    1、北京市××勘察院提供的本場區(qū)《工程地質(zhì)勘察報(bào)告》
    2、體重度統(tǒng)一取為r=20kN／m3。
    3、地面超載按一般情況，考慮為q：20kN／m3。
    4、設(shè)計(jì)與計(jì)算遵循國家及北京市有關(guān)規(guī)范，主要有：
    《建筑地基基礎(chǔ)設(shè)計(jì)規(guī)范》(GB50007—2002)
    《混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范》(GB50010—2002)
    《建筑基坑支護(hù)技術(shù)規(guī)程》(Jql20—99)
2.2  設(shè)計(jì)方案
    根據(jù)我公司在北京地區(qū)施工經(jīng)驗(yàn)，結(jié)合類似工程實(shí)際情況，綜合考慮技術(shù)安全和經(jīng)濟(jì)合理，采用錨噴土釘墻方案。東側(cè)、南側(cè)作斜坡，共4排土釘，從上至下長度依次為5米、6米、5米、4米，錨筋1Ф16，四排錨筋1Ф18，間距依次為1.4米、1.3米、1.3米、1.4米，

Pit Slope Construction Scheme

    Beijing × proposed project, located in Beijing × × area × × Road east, south × ×. The project A, B, E Block, ground × × layer, C1, C2, C3, Block × ground floor, the whole place shear wall. 4 story frame structure of complex building, located 2 basement. Natural surface elevation of 36.30 m, ± 0.00 to 37.50 m elevation, based on depth of about 6.00 meters. '
Narrow due to the construction site, in order to ensure the surrounding building (structures) based on the safety and smooth progress of construction shall be effective on the foundation support.
The geological nature of the site see "Engineering Geological Investigation Report"
2, pit slope design
2.1 Design Basis
    1, Beijing × × Investigation Institute of the site area to provide "engineering geological investigation report"
    2, weight degree of unity is taken as r = 20kN/m3.
    3, overloading the ground by the general situation, consider q: 20kN/m3.
    4, design and calculation to follow the relevant norms of national and Beijing, including:
    "Building Foundation Design Code" (GB50007-2002)
    "Design of concrete structures" (GB50010-2002)
    "Technical Specification for Construction Excavation" (Jql20-99)
2.2 design
    According to our construction experience in the Beijing area, combined with the actual situation similar projects, considering the technical security and economic rationality, use of shotcrete soil nail wall program. East, south to the slopes, a total of 4 rows of soil nails, from top to bottom length of the order of 5 meters, 6 meters, 5 meters, 4 meters, Anchorage 1Ф16, four rows Anchorage 1Ф18, spacing were 1.4 m, 1.3 m, 1.3 m, 1.4 m

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