笔记《喷射劲性混凝土模块建造高层建筑》

这座133米高、44层的La Trobe Tower公寓大楼使用了一种新的预制建筑系统，该系统由Hickory Group开发，由ROTHELOWMAN设计。

预制的建筑构件，包括模块化的浴室舱、预制混凝土板和预先连接的窗户，都被卡车运到现场，并通过起重机安装到位。一旦到位，喷射混凝土被用来提供模块之间的结构稳定。

传统的，这个项目的工期至少24个月，采用预制方法可以使这座塔比原计划提前8个月，仅用了16个月就完工了。

Hickory建筑系统和其它预制体系的关键区别在于，他们使用最适合项目的一系列可互换组件。根据场地和施工方法，可能包括整体卫浴、预装幕墙立面、预制板和钢结构框架。

Hickory建筑系统的另一个优势是，它允许建筑师和顾问在规划阶段采取更协作的工作方式。他们可以非常快速地生成BIM模型，展示建筑将如何被分解为制造，这有助于解决设计问题，映射结构和整合空间，以实现可操作的施工图和制造材料清单。

他们还开发了参数化的‘智能’BIM模型，建筑师可以使用该模型绘制整个建筑结构和立面，并使用Hickory建筑系统进行预制。

风荷载和结构工程方面的考虑是该系统开发的关键关注点，而Hickory有一位内部结构工程专家，负责HBS的所有项目。

Mitchcon was approached by Hickory in early 2014 to discuss the possibilities of using shotcrete as an alternative to insitu concrete in the core and shear walls of their 43-level La Trobe Tower project.

2014年初，Hickory与Mitchcon接洽，讨论在43层La Trobe塔楼项目的核心和剪力墙中使用喷射混凝土作为现浇混凝土的可能性。

Hickory not only required structural shotcrete sprayed up to 43-levels,but they required up to 70m3 per day (which is the volume in one level), of 50, 65 and 80mpa shotcrete (for overhead spraying), and the shotcrete needed to reach a high early strength of 40mpa at day three.

Hickory不仅要求结构喷射混凝土能到达43层，而且每天需要70m³喷射混凝土，涉及50,65,80MPa混凝土强度等级，喷射混凝土需要达到40MPa的3天早期强度。

Hickory Director, George Argyrou and Shan Kumar (Principal Engineer) knew this was a challenging request, as this had not been done anywhere in the world.

hicory的主管George Argyrou和Shan Kumar(首席工程师)知道这是一个具有挑战性的要求，因为这在世界上任何地方都没有做过。

Managing Director of the family business, Mitchcon Pty Ltd, Andrew Mitchell, Manager of Operations Jake Mitchell, and Project Manager Lewis Mitchell saw this as an opportunity to use the experience gained over almost 30 years of concrete pumping and spraying, and began workshopping with Hickory over the next 18 months to satisfy the project brief.

家族企业Mitchcon Pty Ltd拥有30年的混凝土泵送和喷射施工的经验，承接了这个工作。

Mitchcon needed to be creative in meeting the challenge of the volumes of shotcrete required per floor per day to keep up to the demanding project timelines. Another challenge was to ensure that the concrete pump had the capacity to spray the shotcrete up to 43-levels, and still achieve the penetration required to ensure the walls were structurally sound. After seeking much advice from manufacturers all over the world, Mitchcon decided to purchase a high pressure Putzmeister concrete pump through David Bond from CPE Machinery.

Mitchcon需要创造性地应对每层楼每天需要大量喷射混凝土的挑战，以满足苛刻的项目时间表。另一个挑战是确保混凝土泵有能力喷射多达43层的喷射混凝土，并仍然达到所需的渗透，以确保墙壁的结构健全。在向世界各地的制造商寻求了很多建议后，Mitchcon决定通过CPE机械公司的David Bond购买高压普茨迈斯特混凝土泵。

Mitchcon and Hickory then looked to the shotcrete mix itself, and with a long relationship with Holcim, began to work with them to design and test the shotcrete so that it could firstly meet the high levels that Hickory demanded, but also withstand the pressure that would be applied to the mix when being sprayed up to Level 43 of the tower.

Timely deliveries to site, correct slumping of the mix, a careful eye on the pressures on the pump, certified and experienced nozzlemen,cutters and finishers were all required to maintain the quality of the end product of the structural walls.

及时交付到现场，正确的混合，仔细观察泵上的压力，认证和经验丰富的喷射操作工人，合理的喷射角度和最终的抹面工人都需要同时保证，以便结构墙最终产品的质量。

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