| 由预制方涵构件组成无限长的城市综合管廊 |
| 添加时间：2020/11/13 16:44:38 浏览次数： |
| 由预制方涵构件组成无限长的城市综合管廊，可将城镇内的电力、通讯、给水、热力等管线收纳其中，从而可以避免管线维修时对路面的反复破坏。 The urban utility tunnel composed of prefabricated square culvert components can store the electric power, communication, water supply, heating and other pipelines in the town, so as to avoid the repeated damage to the road surface during pipeline maintenance. 本文主要探讨混凝土预制方涵构件的关键技术及应用情况。 This paper mainly discusses the key technology and application of precast concrete square culvert components. 预制方涵构件技术的应用对城市生命线工程起到了至关重要的保障作用，也充分响应了国家提倡的建筑产业化、工业化发展模式，同时也体现了绿色生态的环保理念。 The application of prefabricated square culvert component technology plays an important role in the protection of urban lifeline engineering, and fully responds to the national construction industrialization and industrialization development mode, and also reflects the green ecological environmental protection concept. 1、工程背景及形成过程 1. Engineering background and formation process 目前，城镇内的电力、通讯、给水、热力等管线均埋在地面下，但采用的是普通套管直埋，当维修时会经常把马路的路面刨开作业。这种方式的维修 造成交通不便、材料和人力资源的浪费。 At present, the power, communication, water supply, heating and other pipelines in cities and towns are buried under the ground, but the ordinary casing is directly buried. When the maintenance is carried out, the road surface is often planed. This way of maintenance results in inconvenient transportation and waste of materials and human resources. 一种可进入管内维修的、两米以上内径的方涵构件孕育而生，由这种方涵构件组成无限长的管廊，无需破坏马路路面，通过检修口进入方涵管廊即可作业。 A kind of square culvert component with an inner diameter of more than two meters, which can be entered into the pipe for maintenance, is formed by the square culvert component of infinite length, which can be operated without damaging the road surface. 预制箱涵框架宜采用钢制模具，并且有足够的刚度。现场预制应先在刃脚下放置垫木（工厂预制的可卸至现场时放置垫木），箱涵预制流程如下：打开侧模--清扫模具--喷涂脱模剂--放置钢筋网片--安装内模---安装外模---内外模固定牢固--浇筑混凝土--开启振捣系统--辅助人工手持振动棒振捣--混凝土养护--拆模—构件转运存放。混凝土强度达到设计强度的70%时方可拆模。 The prefabricated box culvert frame should adopt steel mould with enough rigidity. In the field prefabrication, the pad wood should be placed at the foot of the blade (the prefabricated wood can be placed when it is unloaded to the site). The prefabrication process of the box culvert is as follows: open the side formwork, clean the mold, spray the release agent, place the reinforcing mesh, install the internal formwork, install the external formwork, fix the internal and external formwork firmly, pour the concrete, start the vibration system, assist the manual hand-held vibrator to vibrate, maintain the concrete, remove the formwork and transfer the components Transportation and storage. When the concrete strength reaches 70% of the design strength, the formwork can be removed. 工厂预制的箱涵框架，为了减轻重量，混凝土强度等级不低于C30，受力钢筋采用HRB400高强钢筋，配筋计算应根据受力特征，顶板和底板设置弯起钢筋，优化结构设计。 In order to reduce the weight of the factory prefabricated box culvert frame, the concrete strength grade shall not be lower than C30, and the stress reinforcement shall be HRB400 high-strength reinforcement. The reinforcement calculation shall be based on the stress characteristics, and the bending reinforcement shall be set at the top and bottom plates to optimize the structural design. |
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