§1  工程概況

    高樓倒虹吸位于下澤村，緊靠高樓溪主河道，系原高樓渡槽41#－43#槽身的變更結構。全長59.7米（即總干２＋737.42－總干２＋797.12）。高樓倒虹吸由五節(jié)構成，依次為：一節(jié)9.9米長的豎井式進口段、二節(jié)10米長箱形倒虹吸、一節(jié)19.84米長的斜道式出口段、一節(jié)9.96米長的連接段。倒虹吸管身過水斷面尺寸4.5*6.0米，管壁厚80厘米，設計流量為36m3/s，加大流量為39m3/s�？傇靸r113.41萬元。

§2  施工方案簡述
一、 地基開挖與基礎
   （一）、工程地質(zhì)情況
根據(jù)開挖情況鑒定，該段地層的地質(zhì)為：▼12.0以上為粉質(zhì)粘土（含耕土），▼12.0--▼8.0為alQ4層砂礫石，▼8.0層面為砂礫石稍密,并含有少量泥，粒徑以4—10CM為主，滲透系數(shù)K=72—162M/d左右。
該段地質(zhì)地下水位最高為▼13.0，最低為▼11.0。
（二）、施工方法簡述
     1、砂卵石開挖
    采用ROBEX200Le反鏟開挖為主，局部50CM保護層
§ 1 Project Overview

    Ze tall inverted in the lower village, close to the main river channel high-rise, high-rise aqueduct system of the original 41 # -43 # Aqueduct change the structure. Length 59.7 m (ie total dry 2 +737.42 - +797.12 total dry 2). Inverted by the five high-rise structure, as follows: a 9.9 m long vertical pipe entrance, two 10-meter long box-shaped siphon, a 19.84 m long ramp-type Exit, a 9.96 m long connecting section. Inverted siphon cross section size of 4.5 * 6.0 m, pipe wall thickness of 80 cm, the design flow rate of 36m3 / s, increase the flow rate of 39m3 / s. The total cost of 1,134,100 yuan.

§ 2 Construction program brief
1, foundation excavation and foundation
   (A), engineering geology
According to excavation case identification, the geological formation of the paragraph as: ▼ 12.0 above for the silty clay (including cultivated soil), ▼ 12.0 - ▼ 8.0 to alQ4 gravel layer, ▼ 8.0 level for the gravel slightly dense, and contains a small amount of mud particle size to 4-10CM-based, permeability K = 72-162M / d or so.
Geological groundwater level of the highest ▼ 13.0, the lowest ▼ 11.0.
(B), the construction method outlined
     1, sand and gravel excavation
    Mainly by ROBEX200Le backhoe excavation, protective layer of local 50CM
 

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