電梯井降水施工方案9頁(yè)

1、Delegates, staff: Hello! in the run-up to the Spring Festival, we held one session of four staff representatives Conference 2013-workshop, full back in 2012, careful analysis of the current situation, discuss 2013 development plans. Here, on behalf of my company 2013 work reports to the General Asse

2、mbly, for consideration. Pillar I, 2012 back in 2012, XX power companies adhere to the partys 17 great spirit for guidance, comprehensively implement the scientific concept of development, promoting cost-leadership strategy, standards, focus on implementation, lean management, continuously improve,

3、smooth present safety situation of enterprise management, business management and control scientific and standardized, and the dedication of staff, manage a harmonious and democratic atmosphere of the good situation. Main indicators are as follows:-the battery indicator: power generation totaled 7.8

4、15 billion kWh, beyond the annual budget implementation capacity of 315 million kWh, an increase of 757 million kWh. Sales totaled 7.425 billion kWh, exceeding sales of 330 million kWh the annual Executive budget, an increase of 729 million kWh. -Security measures: unplanned outages 2.5 times. No pe

5、rsonal injury accident occurred, no major accident and above, no major fire accidents without environmental pollution accidents, safety for three consecutive years to maintain stability to good posture. Business financial indicators: total profits of 255 million Yuan, beyond the annual budget of 207

6、 million Yuan, beyond the Datang company index 41.89 million Yuan, an increase of 1.76 million Yuan, FCM assessment at grade four. -Energy: power supply standard coal completing 312.25 g/kWh, down 0.1 g/kWh; integrated auxiliary power consumption ratio in 5.12%, down 0.26%; pollutant emissions perfo

7、rmance greatly reduced compared to last year, carbon 0.09 g/kWh, sulfur dioxide 0.104 g/kWh NOx 0.512 g/kWh; dust removal efficiency of more than 99.8%. -Reliability index: equivalent availability factor in 93.47%, increased 7.95% from a year earlier. Equivalent forced outage rate 0.08%, 0.16% reduc

8、tion over the same period a year earlier. Major achievements: first, we should adhere to the two management system basis, strengthening technological research, strengthen hidden hazards control and intrinsic safety Enterprise construction took new steps. -The two management system for improvement. F

9、ocus on promoting the power of the company management system and the application and implementation of the safety loop five-star management system, improve the safety management system, realize the system of safety control. Further regulate security routines, safety supervision and management networ

10、k role to play to achieve closed-loop. Strengthening the supervision and management of habitual violation of, strengthening the safety supervision of outsourcing contractors. Carried out in spring and autumn of security inspections, flood control and inspection, safety production month, day supervis

11、ion of production safety and the Olympic Games and other 江蘇省第一建筑安裝有限公司8#樓電梯井坑降水施工方案1.工程名稱(chēng):本溪恒大綠洲工程8#樓; 2.建設(shè)地點(diǎn)：本項(xiàng)目位于本溪市，高臺(tái)子鎮(zhèn)，梁家村，濱河北路以北，中央大街以南，具體位置見(jiàn)總平面圖；3.結(jié)構(gòu)類(lèi)型：為鋼筋混凝土剪力墻結(jié)構(gòu),抗震設(shè)防烈度為7度；4.建筑規(guī)模:總建筑面積21995.82m2,其中住宅建筑面積為19566.4m2商鋪建筑面積為4131.4m2;5.工程地質(zhì)勘察報(bào)告：中冶沈勘工程技術(shù)有限公司提供的巖土工程勘察技術(shù)報(bào)告書(shū)的詳勘階段。工程編號(hào)：堪2011-258. 地基土

12、層分布詳見(jiàn)巖土工程勘察報(bào)告。勘測(cè)期間穩(wěn)定水位：標(biāo)高為118.60120.07米,該地下水對(duì)混凝土結(jié)構(gòu)及鋼筋混凝土結(jié)構(gòu)中的鋼筋具微腐蝕性。6、自然條件：6.1. 基本雪壓：S0=0.55kN/m2；基本風(fēng)壓：W0=0.5kN/m2，設(shè)計(jì)地面粗糙度為 C 類(lèi)； 6.2. 工程地質(zhì)：在鉆探深度內(nèi)，本工程地質(zhì)原土層構(gòu)成自上而下依次為：1層雜填土,2層細(xì)砂，3 卵石，4 層全風(fēng)化巖石，5 強(qiáng)風(fēng)化巖石，6 層中風(fēng)化巖石，7 全風(fēng)化巖石，8 層強(qiáng)風(fēng)化巖石，9 層中風(fēng)化巖石。6.3. 凍土深度：本工程地基土標(biāo)準(zhǔn)凍結(jié)深度為1.20m；6.4.工程高程：本工程設(shè)計(jì)標(biāo)高0.000相當(dāng)于黃海絕對(duì)標(biāo)高：126.800m

13、。7.地下水控制方法選擇在軟土的基坑開(kāi)挖深度超過(guò)3m,一般就要用井點(diǎn)降水。開(kāi)挖深度淺時(shí)，亦可邊開(kāi)挖邊用排水溝和集水井進(jìn)行集水明排。地下水控制方法有多種，其適用條件大致根據(jù)土層情況、降水深度、周?chē)h(huán)境、支護(hù)結(jié)構(gòu)種類(lèi)等綜合考慮后優(yōu)選。當(dāng)因降水而危機(jī)基坑及周邊環(huán)境安全時(shí)，宜采用截水或回灌方法。當(dāng)基坑底為隔水層且層底作用有承壓水時(shí)，應(yīng)進(jìn)行坑底突涌驗(yàn)定。必要時(shí)可取水平封底隔滲或鉆孔減壓措施，保證坑底土層穩(wěn)定。否則一旦發(fā)生突涌，將給施工帶來(lái)極大麻煩。根據(jù)地質(zhì)勘察報(bào)告第“(三)場(chǎng)地水文地質(zhì)條件”我們知道：勘察場(chǎng)地賦存地下水，地下水類(lèi)型為第四紀(jì)孔隙潛水，主要賦存在砂類(lèi)土、碎石類(lèi)土、雜填土、素填土層中。地下水穩(wěn)

14、定水位埋深在0.709.80m,相當(dāng)于絕對(duì)標(biāo)高117.49120.24 m.地下水主要以大氣降水及太子河側(cè)滲為補(bǔ)給來(lái)源，由于場(chǎng)地的東南側(cè)就是太子河，場(chǎng)地地下水位與太子河水位的變化關(guān)系密切。其常年變化幅度為1.00-2.50m左右，該地下水對(duì)混凝土結(jié)構(gòu)具微腐蝕性；對(duì)鋼筋混凝土結(jié)構(gòu)中的鋼筋具微腐蝕性。因此從地勘報(bào)告在結(jié)合實(shí)際情況看，目前基坑積水的水表面標(biāo)高在-6.8m處。距積水坑混凝土墊層底-7.5m處尚有0.7米高的水位。為了不影響其他工序的施工和工程質(zhì)量；我方?jīng)Q定采取降水措施。因8#樓與東側(cè)渡假村人工湖緊靠，從目前實(shí)際情況看，該坑滲水率流量大，為了有利于電梯井和電梯降水坑混凝土墊層、防水層、等

15、基礎(chǔ)部位各分部分項(xiàng)工程的施工，更加保證其工程質(zhì)量尤其是確保防水質(zhì)量，因此首先要將該水位降低到所有施工部位以下。8.基坑涌水量計(jì)算根據(jù)水井理論，井水分為淺水（無(wú)壓）完整井、潛水（無(wú)壓）非完整井、承壓完整井和承壓非完整井。這幾種井的涌水量計(jì)算公式不同。8.1均質(zhì)含水層潛水完整井基坑涌水量計(jì)算，根據(jù)基坑是否臨近水源，分別計(jì)算如下：（1） 基坑遠(yuǎn)離地面水源時(shí)（圖6-168a）式中Q-基坑涌水量； K-土壤的滲水系數(shù)； H-潛水含水層厚度； S-基坑水位深； R-降水影響半徑；宜通過(guò)試驗(yàn)或根據(jù)當(dāng)?shù)亟?jīng)驗(yàn)確定，當(dāng)基坑安全等級(jí)為二、三級(jí)時(shí)，對(duì)潛水含水層按下式計(jì)算：k-圖的滲水系數(shù)；r0-基坑等效半徑；當(dāng)基坑為

16、圓形時(shí)，基坑等效半徑取圓半徑。當(dāng)基坑非圓形時(shí)，對(duì)矩形基坑的等效半徑按下式計(jì)算： r0=0.29(a+b) (6-127)式中a、b-分別為基坑的長(zhǎng)、短邊。對(duì)不規(guī)則形狀的基坑、其等效半徑按下式計(jì)算：式中A-基坑面積。（2） 基坑近河岸（圖6-168b）(3)基坑位于兩地表水體之間或位于補(bǔ)給區(qū)與排泄區(qū)之間時(shí)(圖6-168c)(4)當(dāng)基坑靠近隔水邊界時(shí)圖6-168均質(zhì)含水層潛水完整井基坑涌水量計(jì)算簡(jiǎn)圖（a）基坑遠(yuǎn)離地面水源；（b）基坑近河巖；（c）基坑位于兩地表水體之間；（d）基坑靠近隔水邊界9.降水降水即在基坑土方開(kāi)挖前，用真空（輕型）井點(diǎn)、噴射井點(diǎn)或管井深入含水層內(nèi)，用不斷抽水方式使地下水位下降

17、至坑底以下，同時(shí)使土體產(chǎn)生固結(jié)以方便土方開(kāi)挖。9.1降水井（井點(diǎn)或管井）數(shù)量計(jì)算式中Q-基坑總涌水量； q-計(jì)算單井出水量；真空井點(diǎn)出水量可按36-60/d確定；真空噴射井點(diǎn)出水量按表6-128確定；管井的出水量q(/d)按下述經(jīng)驗(yàn)公式確定：Rs-過(guò)濾器半徑（m）;l-過(guò)濾器進(jìn)水部分長(zhǎng)度（m）;k-含水層的滲透系數(shù)（m/d）。9.2過(guò)濾器長(zhǎng)度真空井點(diǎn)和噴射井點(diǎn)的過(guò)濾器長(zhǎng)度，不宜小于含水層厚度的1/3。管井過(guò)濾器長(zhǎng)度宜與汗水層厚度一致。群井抽水時(shí)，各井點(diǎn)單井過(guò)濾器進(jìn)水部分長(zhǎng)度應(yīng)符合下述條件：式中y0-單井井管進(jìn)水長(zhǎng)度，按下式計(jì)算；式中r0-基坑等效半徑； Rw-管井半徑； H-潛水含水層厚度；

18、R0-基坑等效半徑與降水影響半徑之和R-降水井影響半徑。9.3井點(diǎn)結(jié)構(gòu)和施工的技術(shù)要求（1）一般要求1）基坑降水為：井點(diǎn)降水方法；井點(diǎn)管長(zhǎng)度、構(gòu)造和數(shù)量；降水設(shè)備的型號(hào)和數(shù)量；經(jīng)典系統(tǒng)布置圖；井孔施工方法及設(shè)備；質(zhì)量和安全技術(shù)措施；降水對(duì)周?chē)h(huán)境影響的估計(jì)及預(yù)防措施等。2）降水設(shè)備的的管道、部件和附件等，在組裝前必須經(jīng)過(guò)檢查和清洗；濾管在運(yùn)輸、裝卸和堆放時(shí)應(yīng)防止損壞濾網(wǎng)。3）降水施工完畢，根據(jù)結(jié)構(gòu)施工情況和土方回填進(jìn)度，陸續(xù)關(guān)閉和逐根拔出井點(diǎn)管。土中所有預(yù)留孔洞應(yīng)立即用砂土填實(shí)。 井點(diǎn)管井點(diǎn)管為直徑38-110mm的鋼管，長(zhǎng)度5-7m，管下端有濾網(wǎng)和管尖。濾管直徑與與水泵有關(guān)如后期用直徑50m

19、m水泵，泵外側(cè)套管在40mm直徑，管壁上滲水孔直徑為12-18mm,呈梅花排列，孔隙率大于35%，管壁外應(yīng)設(shè)兩層濾網(wǎng)，內(nèi)層濾網(wǎng)宜采用30-80目的金屬網(wǎng)或尼龍網(wǎng)，外層濾網(wǎng)宜采用3-10目的金屬網(wǎng)或尼龍網(wǎng)，管壁與濾網(wǎng)間應(yīng)采用金屬絲繞成螺旋形隔開(kāi)，濾網(wǎng)外面應(yīng)再繞一層粗金屬絲。濾管下端裝一個(gè)錐形鑄鐵頭。管上端用彎管與總管相連。 連接管與集水總管連接管用塑料透明管。集水總管一般用直徑75-110mm的鋼管分節(jié)連接，每節(jié)長(zhǎng)4m設(shè)一個(gè)連接管的接頭。根據(jù)基坑平面形狀與大小，水文情況、降水深度而定。當(dāng)基坑（槽）寬度小于6m，且降水深度不超過(guò)6m時(shí)，可采用單排井點(diǎn)，布置地下水上游一側(cè)；當(dāng)基坑（槽）寬度大于6m，

20、或土質(zhì)不良，滲透系數(shù)較大時(shí)，宜采用雙排井點(diǎn)，布置在基坑（槽）的兩側(cè)，當(dāng)基坑面積較大時(shí)，宜采用環(huán)形井點(diǎn)；沿抽水水流方向有0.25%-0.5%的上仰坡度，根據(jù)降水深度及儲(chǔ)水層所有位置決定，但必須將濾水管埋入含水層內(nèi)，并且比挖基坑（溝、槽）底深0.9-1.2m。原設(shè)計(jì)8#工程筏板基礎(chǔ)混凝土墊層在-5.8米處，相當(dāng)于黃海絕對(duì)標(biāo)高：121米。電梯井埋深在-7.4m，相當(dāng)于黃海絕對(duì)標(biāo)高：119.4m。積水坑埋深在-8.4米處。相當(dāng)于黃海絕對(duì)標(biāo)高：118.4m。該工程在電梯井和積水坑土方開(kāi)挖時(shí)挖至到-6.8m(相當(dāng)于120m)時(shí)見(jiàn)地下水，目前基坑采取邊抽水邊用挖掘機(jī)開(kāi)挖以挖至-7.54米處，但因水位滲透快目

21、前以停止開(kāi)挖。經(jīng)請(qǐng)示甲方駐工地工程指揮部本溪嘉熙置業(yè)有限公司工程部，工程部決定變更圖紙?zhí)岣呖拥讟?biāo)高。10.根據(jù)現(xiàn)場(chǎng)實(shí)際情況結(jié)合“2011年10月20日甲方下發(fā)設(shè)計(jì)補(bǔ)充、變更圖紙通知單編號(hào)：BXZX-0031/3”的通知單電井坑目前需回填砂0.99m。綜合以上降水方法該處降水在有大量水位滲入時(shí)，先用直徑100后用揚(yáng)程不小于10m管徑在50mm以上的潛水泵抽出大量積水。在其坑內(nèi)選擇與其他樁基等不妨礙處，用挖掘機(jī)挖掘比坑基最深處（-7.5m）深挖1000mm800800安裝抽水泵的積水坑。此坑要求能將所有施工部位的水全部降至抽水坑內(nèi)，以便潛水泵能夠及時(shí)將施工區(qū)域內(nèi)的水抽出坑外。確保該區(qū)域土方開(kāi)挖和其

22、他工序的順利施工?；咏档偷叵滤喾Q(chēng)地下水控制，即在基坑工程施工過(guò)程中，地下水要滿(mǎn)足支護(hù)結(jié)構(gòu)和挖土施工的要求，并且不因地下水位的變化，對(duì)基坑周?chē)沫h(huán)境和設(shè)施帶來(lái)危害。因此抽水的泵坑要選擇在積水坑的一側(cè)，水泵后期可選用直徑50mm揚(yáng)程10m以上的小型泵，水泵外面加直徑400mm鋼套管，管壁上滲水孔直徑為12-18mm,呈梅花排列，孔隙率大于35%，管壁外應(yīng)設(shè)兩層濾網(wǎng)，內(nèi)層濾網(wǎng)宜采用30-80目的金屬網(wǎng)或尼龍網(wǎng)，外層濾網(wǎng)宜采用3-10目的金屬網(wǎng)或尼龍網(wǎng)，管壁與濾網(wǎng)間應(yīng)采用金屬絲繞成螺旋形隔開(kāi)，濾網(wǎng)外面應(yīng)再繞一層粗金屬絲。同時(shí)鋼套管外面要用在填灌砂濾料前應(yīng)把泥漿稀釋?zhuān)嗔啃∮?%時(shí)才可以灌砂。砂

23、濾料填灌高度應(yīng)符合基坑施工的規(guī)范要求。套管安裝完畢應(yīng)進(jìn)行試抽，全面檢查管路接頭、出水狀況和機(jī)械運(yùn)轉(zhuǎn)情況。一般開(kāi)始出水渾濁，經(jīng)一定時(shí)間后出水逐漸變清。為了不影響防水和混凝土及鋼筋等工程施工，該降水坑在填砂至一定標(biāo)高時(shí)將坑頂全部封閉預(yù)留一二個(gè)通氣孔，等防水材料施工完后無(wú)地下水滲入后拔出該泵，如果對(duì)以完成的項(xiàng)目有破壞就將該泵埋葬坑內(nèi)，割斷泵管和供電電纜后封閉好該點(diǎn)處，切不可因?yàn)楸枚茐钠渌淹瓿傻墓こ淌┕ろ?xiàng)目。施工中要注意安全管理，水泵設(shè)專(zhuān)人看管專(zhuān)人開(kāi)關(guān)，有水及開(kāi)無(wú)水既停，經(jīng)常檢查線路和泵的運(yùn)情況以防漏電傷人。同時(shí)抽水時(shí)要注意觀察坑內(nèi)情況注意坑內(nèi)地表有何變化等。編制單位：江蘇省第一建筑安裝工程有限公

24、司本溪恒大綠洲工程項(xiàng)目部2011年10月14日主要介紹的是永磁直流電動(dòng)機(jī)；首先簡(jiǎn)述了永磁電機(jī)、永磁直流電動(dòng)機(jī)從產(chǎn)生到到逐步改善的發(fā)展過(guò)程，以及以此為基礎(chǔ)的未來(lái)發(fā)展的趨勢(shì)；activities, comprehensive and tamping Safety Foundation . Troubleshooting, management mechanism, give full play to role of technical supervision and realization of troubleshooting, management, improved process manag

25、ement. This year completed the boiler lower header leakage, boiler pressure, a major risk management, completed 29 of great risks and 3 General problems of governance. Complete chemistry lab construction, thermal control, and complete the boiler scale integrated management, host shafting vibration o

26、f 10 scientific and technological projects, such as. Complete supercritical 630MW on-line simulation system development and application of circulating water MCC standby power transformation, the transformation of desulfurization waste water, the unit water supply system of comprehensive treatment an

27、d discharge valve modification of coal mill 5 key technological transformation projects, group health is improved. -Science and technology innovation is further increased. Strengthen the characteristics of supercritical unit major issues, gradually clearing the particularity of supercritical unit an

28、d regularity. Developed motor oil time management, switch action times, statistics, coal-aided measurement software, improves the production level of lean management. Increased investment in science and technology, reporting science and technology projects and 14 technical project total cost percent

29、age of the total annual production output of 0.25%. Large-scale coal-fired power plant flue gas desulfurization, denitrification complete development and application of key technologies project, won the national science and technology progress second prize. 630MW supercritical units optimized contro

30、l strategies and the 630MW development and application of on-line simulation system for supercritical units, supercritical 600MW units of turbine driven boiler feed pump set of comprehensive treatment of defects Datang technology respectively one or two and third. Meanwhile, information technology achievements, the company was named