發(fā)布時(shí)間：2018-01-06 22:03

  本文關(guān)鍵詞：長(zhǎng)春市正陽小學(xué)消防水池工程基坑支護(hù)及降水設(shè)計(jì)　出處：《吉林大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 基坑 基坑降水 降水設(shè)計(jì) 基坑支護(hù) 支護(hù)設(shè)計(jì)

【摘要】：基巖土工程技術(shù)界的一個(gè)熱點(diǎn)、難點(diǎn)問題是基坑工程，其具有很強(qiáng)的綜合性、復(fù)雜性，對(duì)個(gè)科學(xué)領(lǐng)域都有所涉及，更影響工程安全和成本因素。因此，選取這一課題來進(jìn)行鉆研探究具有一定的現(xiàn)實(shí)意義。 基坑開挖時(shí)，基坑降水和支護(hù)是最重要的兩個(gè)部分。尤其在地下水位較高的土層，基坑開挖前，必須進(jìn)行基坑降水，為接下來施工創(chuàng)造一個(gè)安全干燥的環(huán)境。 本文就長(zhǎng)春市正陽小學(xué)新建消防水池這一工程實(shí)例，對(duì)基坑支護(hù)和降水分別進(jìn)行了探討。該項(xiàng)目位于長(zhǎng)春市綠園區(qū)，根據(jù)其工程概況和地質(zhì)條件，對(duì)基坑施工方案作了初步設(shè)計(jì)。經(jīng)過對(duì)比分析多種基坑支護(hù)方式、降水方法以及它們的適用條件后，經(jīng)綜合考慮，最終確定本基坑的支護(hù)方法為土釘墻支護(hù)；降水方法采用管井井點(diǎn)降水。為設(shè)計(jì)單位提供了可靠的理論和試驗(yàn)數(shù)據(jù)，對(duì)具體施工方案都作出了相應(yīng)的環(huán)保及防治措施，并制定了應(yīng)急預(yù)案，用來保證施工的順利進(jìn)行。 土釘支護(hù)深度6.0m斷面，土釘自上而下長(zhǎng)度分別為6m，6m，6m，5m；行距1.3m，列距1.5m，，角度15度，直徑130mm，土釘鋼筋直徑18mm，土釘面層80mm。對(duì)基坑支護(hù)系統(tǒng)的設(shè)計(jì)計(jì)算可知，整體穩(wěn)定安全系數(shù)、土釘抗拔力安全系數(shù)，抗滑穩(wěn)定安全系數(shù)、抗傾覆穩(wěn)定安全系數(shù)均滿足安全要求。 管井井點(diǎn)降水是目前比較先進(jìn)、可靠的降水技術(shù)。當(dāng)施工環(huán)境的地下水位較高時(shí)，可以選取這一降水方式，它是地基與基礎(chǔ)工程施工及土方開挖過程中常用到的一種降水技術(shù)手段，可有效降低地下水位，減少基坑土體含水率，改善土壤的物理和機(jī)械性能，提高土體的承載力與地基強(qiáng)度，降低土壤的側(cè)向位移與沉降。 本工程為潛水完整井，沿開挖的基坑周圍，離基坑邊緣1.0m處，每隔8m設(shè)置一個(gè)管井，井埋置深度為13m，每個(gè)管井單獨(dú)用一臺(tái)潛水泵進(jìn)行抽水，井點(diǎn)數(shù)為10個(gè)，降水水位深度為5.7m，在基坑內(nèi)設(shè)排水溝和集水井，在基坑頂部混凝土護(hù)面外側(cè)設(shè)置排水溝排水。 本文所做的設(shè)計(jì)方案在實(shí)際工程中取得圓滿成功。
[Abstract]:A hot rock soil engineering technology field, is the difficult problem in foundation pit engineering, it is comprehensive, very strong complexity, has involved in the scientific field, the more influence the safety and cost factors. Therefore, choosing this topic to study research has certain practical significance.
Foundation pit excavation, foundation pit dewatering and support is the most important two parts. Especially in the high water level soil layer, before foundation pit excavation, we must carry out foundation pit dewatering, so as to create a safe and dry environment for the next construction.
This paper Changchun Zhengyang city primary school new fire pool of this project, for the excavation and precipitation are discussed. The project is located in the district Changchun City, according to the engineering situation and geological conditions of foundation pit construction has made the preliminary design scheme. Through comparative analysis of various excavation, precipitation method and the applicable conditions of them, after comprehensive consideration, and ultimately determine the foundation pit supporting method for soil nailing wall; precipitation method using tube well point precipitation. Provide a theoretical and reliable test data for design units, have made environmental protection and prevention and control measures of concrete construction plan, and develop a contingency plan for to ensure the smooth progress of the construction.
Soil nailing depth 6.0m section, from top to bottom soil nailing length were 6m, 6m, 6m, 5m; 1.3m row space, column spacing 1.5m, 15 degree angle, diameter 130mm, diameter of 18mm reinforced soil, soil surface layer 80mm. design of foundation pit supporting system calculation shows that the overall stability coefficient, soil nail pullout force of safety the coefficient, the safety factor of stability against sliding, overturning stability safety factor meets the safety requirements.
Well well point precipitation is more advanced, reliable precipitation technology. When the underground water level is higher the construction environment, you can select the precipitation method, it is a kind of precipitation technique that is often used in the construction process of foundation engineering and earthwork excavation, can effectively reduce the ground water level, reduce the water content of foundation soil rate. The improvement of soil physical and mechanical properties, improve the bearing capacity and strength of foundation soil, reduce soil lateral displacement and settlement.
This project is a complete diving well, around the excavation of the pit, away from the edge of the pit at 1.0m, every 8m set up a well, well depth is 13m, each with a single well pumping of submersible pumps, wells points to 10, precipitation water depth is 5.7m, drainage ditch and sump pit in setting the drainage pit top concrete lateral drainage.
The design scheme made in this paper has been successfully completed in the actual project.

【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU753

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相關(guān)期刊論文 前3條

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本文編號(hào)：1389699