Design of pouring type bituminous concrete core wall dam for reservoir

[Abstract]The total installed capacity of Jinghong hydropower station is 1750MW,the diameter of its water diversion steel pipe is up to 11.2m.Range of head variation may be bigger in the unit operation.The vibration characteristics of unit and important member of power house structure may be different from other normal hydropower stations have been built.The paper emphatically monitors and analyzes the vibration status both the turbine pier supporting the unit and the floor as the basic of the support equipment.

[Key words]power house;vibration;test;analysis

WANG Shi-gang

[Abstract]The Toudaogou reservoir is a comprehensive hydraulic project with total storage capacity of 4.5982 Mm3.The dam is a sand-gravel dam with pouring type bituminous concrete core wall,with the maximum dam height 52.42 m and the maximum pouring height of core wall 48.72 m.The paper elaborates the selection of dam materials,the design of dam cross-section,the treatment of dam foundation and the mix proportion of bituminous concrete,etc.Through the inspection of water storage operation in three years,the seepage prevention of reservoir dam is good.

pouring type bituminous concrete core wall;transition material;mix proportion of bitumen; foundation treatment

Design of construction diversion for danger relief and reinforcement project of Chaersen reservoir

LIU Mu-chong,LIU Tao,WAN LU

[Abstract]Chaersen reservoir is a large with the utilization function of the flood control and irrigation combined the power generation and aquaculture,etc.Because some troubles of dam foundation seepage and spillway structure safety and other，design of danger control and reinforcement project was begun in 2011.Based on the layout characteristics of reinforcement project and operation situation of the reservoir,the diversion scheme, program and structure are designed,which could provide reference for the similar project.

[Key words]diversion standard;diversion procedure;diversion program;overflow cofferdam;mold bag concrete

Transformation of temporary storage project for Dazhang ecological drought relief in main stream of Liaohe river

CHEN Hai-shan

[Abstract]Recently,the serious pollution in the upstream and the continuous drought of the Liaohe river basin have damaged the fragile ecological environment.The Dazhang ecological drought relief temporary storage engineering is an exploration and experiment of the ecological construction under the situation of drought and water shortage of the main Liaohe river.The paper introduces the general situation of the engineering and the designs of the rubber dam,steel gate dam,ecological slope protection and wetland,which would provide reference for the future perfection of the ecological construction of the river channel.

[Key words]main stream of Liaohe river;rubber dam;ecological water storage;transformation

Application of raise-bore machine in overflow shaft project of water conveyance engineering

SHEN Ji-cheng

[Abstract]Based on the actual situation of the overflow shaft of 4-8 pressure tunnels in water conveyance project,the raise-bore drill construction method is selected combined with the advantages of raise-bore machine, which could ensure construction safety and reduce the labor intensity of field operations personnel.The paper analyzes comprehensively the construction quality,the construction schedule,the construction costs,and so on.

[Key words]tunnel project;raise-bore machine;overflow shaft

Rapid calibration and verification for mobile soil moisture status measure instrument with probe type

LI Chang-long

[Abstract]The mobile soil moisture status measure instrument with probe type could add the number of the monitor stations and the monitoring frequency along with the drought situation,and be directly used in field, which could avoid the error caused by the asynchrony of the environment change between the fixation burying automatic instrument and the field.When the calibration formula between the mobile soil moisture status measure instrument with probe type and the field soil is built,the instrument could be used normally.Through the research of the monitor principle and using method of the instrument,the paper puts forward the rapid calibration formula scheme in laboratory and builds the accurate and reliable calibration formula.Comparing with the monitoring data obtained by the artificial drying method in the use process of the mobile soil moisture status measure instrument with probe type,the accuracy of the formula are verified.It has important significance for the drought emergency monitoring.

[Key words]soil water;mobile soil moisture status measuring instrument;calibration;verification

Unconfined compression strength test for cement-soil

YUAN Bao-jun

[Abstract]In order to discuss the influence of cement content,age and moisture content on unconfined compression strength of cement-soil,lots of the unconfined compression strength tests are made under the condition of the different cement-soil samples.The cement content is respectively 2%,4%,6%,8%and 10%,the age is respectively 7d,14d and 28d and the moisture content is respectively 2%,4%,6%,8%and 10%.The results show that,the unconfined compression strength of cement-soil increases with the cement content and the age increasing,the unconfined compression strength of cement-soil increase first and then decrease with moisture content increasing,when the moisture content is about 6%,its strength reaches its maximum.

[Key words]cement content;moisture content;age;unconfined compression strength

Analysis of hydraulic characteristics of reservoir combined operation between flood discharge and power generation

QIANG Li-feng

[Abstract]Under a certain water level and storage capacity,considering the complex hydraulic status and the complex geographical and geological conditions,a power branch tunnel is excavated in the late based on the flood discharging tunnel has been built.The aim are meeting the requirement of flood discharging and irrigation,also meeting the water supply and power generation of the branch tunnel in time,and realizing the combined operation of flood discharging tunnel and power branch tunnel of reservoir.By using the hydraulic model test method and water supply allocation relationship of the flood discharging tunnel and the power branch tunnel,the paper studies the hydraulic characteristics of the water supply discharge of different branch tunnels and the velocity distribution at downstream under the different working conditions,which could provide the basic data and determine the solution scheme for the hydraulic characteristics and water conveyance guarantee for the double tunnel layout.

[Key words]Chaihe reservoir;flood discharging tunnel;double tunnel layout;hydraulic characteristics;model test

Measure and analysis on structure vibration response of power house for Jinghong hydropower station

MIAO Zong-wei