这个项目–将社会和自由市场的住房混合在一起并无差异–实际上要求消耗现有的建筑体积。这种限制，加上我们对自己提出的效率和简单的要求，对开发一个具有一定附加值的项目是一种挑战。为此，我们寻找一个既务实又对外部刺激敏感的提案的隐藏力量。

The program —mixing social and free-market housing in coexistence and without differences—demands practically the consumption of the available building volume. This constraint, together with the demands for efficiency and simplicity that we impose on ourselves, represents a challenge for the development of a project with some added value. To this end, we look for the hidden powers of a proposal that is both pragmatic and at the same time sensitive to external stimuli.

我们首先布置了一个有12个住房单元的典型楼层。我们通过引入一个中央垂直核心，配备两个互锁的 “剪刀 “式楼梯、两部电梯和两个安装井，将流通区域限制到绝对最小。因此，我们将获得一个单一的公共入口，将所有的连接集中在底层，并允许在街面有一个优化的商业空间和一个有效的地下停车场布局。所有的公寓都提供与外墙相连的客厅和卧室，而个人通道、厨房和浴室则与三个单元的微型社区共享的走廊相连。从这个巩固可用体积的方案中，进行了减法操作，使一个新的形态被雕刻出来，产生了慷慨的集体和个人露台，同时促进了交叉通风和对角线视图，使建筑面向最有吸引力的景观。

We start by laying out a typical floor with twelve housing units. We limit circulation areas to the absolute minimum by introducing one central vertical core equipped with two interlocking “scissors” type staircases, two lifts, and two installation shafts. We will therefore obtain a single public entrance centralizing all connections on the ground floor and allowing for an optimized commercial space on the street level and an efficient underground parking layout. All apartments provide living rooms and bedrooms connected with the exterior façade, while individual accesses, kitchens, and bathrooms connect with hallways that are shared by micro-communities of three units. From this scheme that solidifies the available volume, subtraction operations are carried out that allows a new morphology to be sculpted, generating generous collective and individual terraces while facilitating cross ventilation and diagonal views that orient the building towards the most attractive landscapes.

外立面是由重复的托架建立起来的，托架上有可移动的可调节的百叶板，作为遮阳板，同时有效地允许自然通风，为这个住宅建筑的可识别性和纪念性形象做出贡献，幸运的是它被公共空间所包围。院子和走廊的外墙创造了一个独特的准图片式的公共空间环境，墙壁和地板上的彩色格子和传统的加泰罗尼亚陶瓷瓦片让人想起当地流行的家庭文化。Caracol建筑是一个重新思考周边概念的邀请。如果骑自行车，我们与历史中心、Llobregat果园、海滩和Prat机场的距离相当，也许一个住宅区和工业仓库混杂的环境会变成有一个中心条件，可以接触到各种背景和规模，这是会议中心所无法达到的。

The exterior facades are built up by repetitive bays with moveable panels of adjustable louvers that function as sunscreens while effectively allowing for natural ventilation and contributing to the recognizable and monumental image of this residential building so fortunately surrounded by public space. The facades of the courtyards and corridors create a distinct quasi-picturesque environment of the communal spaces with colorful latticework and traditional Catalan ceramic tiling on the walls and floors reminiscent of the local popular domestic culture. The Caracol building is an invitation to rethink the concept of the periphery. If by bicycle we are at an equivalent distance from the historic center, the Llobregat orchards, the beach, and the Prat airport, perhaps a context where residential blocks and industrial warehouses are mixed up turns out in having a central condition accessible to a variety of contexts and scales that are not attainable from the convention center.

Architects: Estudio Herreros, MIM-A
Area: 12500 m²
Year: 2019
Photographs: José Hevia
Lead Architect: Abraham Piñate
Architects:Juan Herreros, Jens Richter, Mariona Benedito, Martí Sanz
Design Team:Martha Sosa Días, Verónica Meléndez, Paola Simone, Carmen Antón, Filippo Sapienza, Xavier Isart, Clara Vidal, Ignasi Agustí, Ignasi Navàs
Structures:Manuel Arguijo
City:Sant Boi de Llobregat
Country:Spain