大规模加载孔预埋件精确定位安装技术

针对加载孔预埋件数量众多,预埋件定位精度要求高,且结构内部布置了大量用于定位预埋件的型钢骨架,同时还布置有受力用预应力筋束及非预应力筋网,纵横交错,施工难度大问题。采用新型施工工艺,在预埋件固定、预埋件位置调节两方面做了创新改进,确保预埋件施工精确;同时,结合BIM技术进行施工模拟,有效规避钢骨架、预埋件、结构钢筋的碰撞,优化施工方案

大型无粘结预应力型钢混凝土反力墙施工技术

主要介绍大型无粘结预应力型钢混凝土反力墙施工技术,运用BIM技术对反力墙结构中复杂的钢骨架、预埋件、预应力筋束、普通钢筋进行优化布置、深化设计、施工模拟及可视化交底。通过设置预埋件支撑钢架及可调式双螺母螺栓,安装固定预埋件,使预埋件位置易于调节,精度易于控制。研究墙内水平、竖直双向双层无粘结预应力筋束张拉方案,采用合理的模板及自密实混凝土浇筑技术,确保反力墙表面平整度、垂直度满足高精度要求

一种无粘结预应力型钢混凝土墙

本实用新型公开一种无粘结预应力型钢混凝土墙，所述混凝土墙包括：混凝土墙体；非预应力筋网，设置在所述混凝土墙体内；无粘结预应力筋束，设置在所述混凝土墙体内并位于所述非预应力筋网的内侧；工字型钢，设置在所述混凝土墙体内；预应力筋束锚固装置，用于锚固所述水平向无粘结预应力筋束及所述竖直向无粘结预应力筋束，所述预应力筋束锚固装置固设在所述混凝土墙体的边沿处。本实用新型所述无粘结预应力型钢混凝土墙，解决现在预应力型钢混凝土结构中采用有粘结预应力筋压浆困难、竖向预应力筋防腐和竖筋与混凝土整体粘结受力得不到保障的问题

一种加载孔预埋件的型钢支撑装置

本实用新型公开一种加载孔预埋件的型钢支撑装置，包括：支撑钢柱，固定设置在反力台座上；支撑钢梁，固定设置在所述支撑钢柱的顶端；加固钢梁，固定设置在所述支撑钢梁上，并与加载孔预埋件能够拆卸的固定连接；角钢加固装置，固设在所述加固钢梁和所述加载孔预埋件之间；L型角钢架，固定设置在所述加固钢梁和所述角钢加固装置上；可调式双螺母螺栓，连接于所述角钢加固装置和所述加载孔预埋件之间、所述L型角钢架和所述加载孔预埋件之间及所述加固钢梁和所述加载孔预埋件之间；其中，加载孔预埋件，阵列式排布在所述支撑钢柱内并固定设置在所述反力台座上。本实用新型所述加载孔预埋件的型钢支撑装置能够使加载孔预埋件有着较好的定位精度

一种加载孔预埋件的型钢支撑装置及其施工方法

本发明公开一种加载孔预埋件的型钢支撑装置及其施工方法,所述装置包括：支撑钢柱；支撑钢梁；加固钢梁；角钢加固装置；L型角钢架；可调式双螺母螺栓。所述施工方法包括：步骤1：在支撑钢柱上焊接支撑钢梁；步骤2：在支撑钢梁上焊接加固钢梁；步骤3：将角钢加固装置固定在加固钢梁上；步骤4：焊接L型角钢架；步骤5：安装可调式双螺母螺栓；步骤6：铺设双向非粘结预应力钢筋束和绑扎非预应力钢筋网；步骤7：对加载孔预埋件的型钢支撑装置进行混凝土浇筑；步骤8：锚固,切除多余钢绞线,涂刷环氧树脂,封锚。本发明所述加载孔预埋件的型钢支撑装置能够使加载孔预埋件有着较好的定位精度,所述施工方法使加载孔预埋件的位置易于调节

Expert consensus on the management of dermatogenic chronic pruritus in children

瘙痒见于多种疾病,在儿童多由皮肤疾病导致,即皮肤源性瘙痒.持续存在的慢性瘙痒治疗困难,可对患儿的睡眠、情绪、认知、学校表现及社会家庭功能等方面产生负面影响,严重影响患儿及其家庭成员的生活质量.临床上迫切需要对儿童慢性瘙痒进行规范化管理,而目前国内外缺乏独立的儿童慢性瘙痒诊疗指南或共识.该共识根据循证医学证据及专家意见,制定了一套针对0～18岁儿童皮肤源性慢性瘙痒的管理方案,供临床医生参考.</p

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies