COMM[UNIT]Y_competition edition

THE COMM[UNIT]Y

AN URBAN DESIGN PROJECT IN SAN CRISTOBAL, COLOMBIA

CONTEXT

SITE SELECTION By overlapping the different problem together, the most problematic site is showed as below. By overlapping the different problem together, the most problematic site is showed as below.

CONFLICT BETWEEN ENVIRONMENT AND URBANIZATION

URBANIZATION IN ABURRĂ VALLEY

290KM TO THE NEW PORT As the dormitory community to Medellin, San Cristobal is attracting people from the surrounding area. Also, with the connection to the new port, the population of San Cristobal is projected to be tripled by 2050.

9.6KM TO DOWNTOWN Site

INSUFFICIENT OPENS PACE

High Density Informal settlement Building New Development Road

REGIONAL DEVELOPMENT Major Stream

Urban Area

San Cristobal

Major Roads FARMLAND DEGRADATION

Desegregated Farmland Farmland

The development in San Cristobal is facing the constrict from the topography and fragile geological foundation. On the other hand, the develop is accelerating the degradation of the environment but also causing the bad living condition.

1300

1200

Major Stream

Forest

Informal settlement

Building

Ecological Zone

WATER POLLUTION

CONFLICTION BETWEEN INFORMAL SETTLEMENT AND ENVIRONMENT 1100

Forestland

ANNUAL PRECIPITATION Floodplain

1000

1.LANDSLIDE

2.WATER POLLUTION

From the 1980s, the temperature

900

800

increased

1C and the precipitation 25%

688 homes LACK OF wastewater

3.FARMLAND DEGRADATION

treatment.

4.INSUFFICIENT OPENSPACE

Agriculture Other

Unemployed Employed

2.2 Million ppl

80

0.8 %.

60 700

1905

0.3 Million ppl

Nonrecoverable

1915

1925

20

POPULATION IN SAN CRISTOBAL

50000 ppl

1935

1945

LANDSLIDE

40

0.7 Million ppl

POPULATION IN MEDELLIN 600

Pollution Building in Flood Plain

2.9 Million ppl

2.22 %

of the families share their houses , while the municipal average less than

increased , which makes the disaster like landslide more easily to happen.

3.5 Million ppl

1955

1965

1975

Recoverable Slope above 50%

1985

1995

2005

2013 0

LOCAL ENGAGEMENT COLLABORATION--HOW THE SYSTEM WORKS INDIVIDUAL

GOVERNENT

DEVELOPER

EDUCATION INSTITUTE

NGO

INCENTIVES

$

INFRASTRUCTURE LAND FORMING HOUSING FOUNDATION INCREMENTAL HOUSING AMENITY

FAR

FUNDING

REGULATIONS ≤6 F

15M

40

LABOR

FUNDING

%

≤ 2.5

FAR

INSTRUCTION

WOOD

FOUNDATION INFRASTRUCTURE

$ $

LOCAL LABOR

DEVELOPER

RECYCLED BRICK

EDUCATION INSTITUTE

TRAINING GRAVEL RECYCLED BOTTLE

GOVERNMENT

UNEMPLOYED HOUSEWIFE

TRAINING

LOCAL LABOR

INVESTMENT +LAND $ VALUE

Longterm and regional vision

PLANNING STRATEGY

COMMUNITY

RESIDENTS

RETAIL

Local engagement with the community design.

NGO PLANNER

LANDSCAPE UNIT INSUFFICIENT OPENS PACE

FARMLAND DEGRADATION

WATER POLLUTION

LANDSLIDE

688 Homes LACK OF wastewater treatment.

From the 1980s, the temperature increased 1C and the precipitation increased 25%, which makes the disaster like landslide more easily to happen.

WATER MANAGEMENT

SLOPE STABILIZATION

San Cristobal 2.22 %

City Wide

of the families share their houses , while 0.5m/ inhabitant the municipal average less than 0.8%

Unemployed Employed

Agriculture Other

4.01m/ inhabitant

OPEN SPACE CREATION

Utilize the Space Under the Building

Utilize the Rooftop Space

Connected the Rooftop with Street

Introduce Recreational and Sports Filed

FARMLAND PROTECTION

Building as Stablization

Contour Ridging

Bioswale

Clay and Loam

Collect Rain Water and Guide Water Flow

Steep Slope

Terraced Farmland with Gabions

Rainwater Garden

Geocell

Steep Slopes

Collect Rainwater and Fltrate Water

Steep Slope Loose Soil

Vetiver Terracing

Wetland

Overlapped Gabions

Medium Slope

Fltrate Water

Medium Slope

Contour Cultivation

Retention Pond

Vegetated Gabions

Gentle Slopes

Fltrate Water Fooding Buer

Gentle Slope

ARCHITECTURE UNIT

1 SINGLE UNIT STRUCTURE

INCREMENTAL HOUSING FLOOR

4.5 ~ 6m

2 INCREMENTAL UNIT 3F - Stage A Apt.B Apt.A

3F - Stage B

3F - Stage C

3F

VARIATIONS

2F 1F Lower Floor Commercial Or Open Space

2F

Local Material

1F - Stage A

1F - Stage B

1F - Stage C

3 UNIT COMBINATION Future Construction Rooftop Garden Maximum Five-floor Construction Upper Level Street Lower Level Street Open Space

Material Compositions

Open Space Commercial Space

UNITS COMBINATION - A

SUSTAINABLE ECONOMY CIRCLE

URBAN CONDITION - COMMERCIAL ACTIVITY

Self-grown Fruits

Left over food transfered to market

Rooftop Farmland to Grow Daily Food Take advantage of the rooftop to build farmland and support daily needs, and the left over food would be transfered to food market held every weekends to engage the public

Weekly-Use Food Market Farmer

Residential

Sell or Exchange Second-hand Daily Necessities

Seasonal Event: Flea Market Residential can also engage the seasonal market by selling or exchanging second-hand daily necessities to their neighborhoods.

Existing Slope

Proposed Slope

Local People

UNITS COMBINATION - B

CROPS BENEFICIAL FOR SOIL EROSION CONTROL

RURAL CONDITION-FARMLAND

Cassava

Pueraria Phaseoloides Macroptillium Atropurpureum

Calopagonium

PLANTS FOR SOIL EROSION CONTROL

Vetiver Grass

Cogon Grass

Napier Grass

Tussock Grass

SYMBIOSIS AND SOIL EROSION CONTROL Support Maize

Vetiver Grass

Vetiver Grass

Bean Squash

Gabion Wall

Nitrogen

Pest control

South America traditional agriculture utilize the symbiosis relationship between crops , like maize, bean and squash to establish a relative large yield in the sustainable way. The agriculture in and near the community could draw the experience from the traditional practice. Except for the large yield, it also require less pesticide , fertilizer and maintenance.

VEGETATIVE TECHNIQUES

N Existing Slope

Vetiver terracing utilizes the strong root system of vetiver to stabilize the slope, suitable for medium slope.

Contour cultivation that cultivate the crops along the contour is suitable for less steep slopes.

Strip cropping is an inexpensive, large-scale agri-industrial technique to improve the poor soils. Fast-growing plants can be repeatedly grown and then plowed into the soil to create a green manure, adding organic matter and depth to the soil over time.

ENGINEERING TECHNIQUES Proposed Slope

$ $2 per square meter Easy to acquire the material Create job from recycling Easy to manage by the local

Terraced farmland with gabions is suitable for steep slopes.

Contour ridging that with mounds and dredging suitable for clay and loam who’s drainage quality is low.

UNITS COMBINATION - C

TOPOGRAPHY AS WATER MANAGEMENT

Rain

Let the Gravity to Do the Work

CREEK CONDITION-LEISURE PARKS

From Upper Terrace

RAINWATER MANAGEMENT

Bioswale

Rainwater Collection & Filtration

Rainwater Garden

Rainwater Filtration

Wetland

Water Cistern Grey Water Preliminary Treatment

GREY WATER TREATMENT

WATER RECYCLE

Water Filtration

Medellin peopel daily consuption L/day Recycled Water 60% =127L/day

211

100000L/day

Texsting Site： 900 people = Retention Pond Water Storage & Flooding Buffer

RAINWATER COLLECTION

16.6

Average Rainfall days mm/day Testing Site: 100000mCollecting Area: 40000m 2

Recycled Water for Irrigation & Househood Use in the Lower Terrace

2

6640L/day

Texsting Site： Daily Rain Water Havesting：

MEDELLIN ANNUAL RAINFALL

Rainfall 1,672.9mm/year

250 200 150 100 50 0

1 2 3 4 5 6 7 8 9 10 11 12 Medllin has two rainny season and two dry season. The landscape in dry and wet season would perform differently and be flexible.

Existing Slope

PLANTS FOR WETLAND AND RAINWATER GARDEN

Proposed Slope

Big Blue Stem

Sweetflag

Lythrum

Greater Bur-Reed

UNITS COMBINATION - D

SOCIAL GROUP NEEDS Insufficient Activity Space

PUBLIC SPACE CONDITION - INTERGENERATIONAL BRIDGE

Increased Open Space And Program

Activity

Open Space

Social Group Interaction

Circulation

Various Space for Different Social Group

Communication/Activity Programs for Various Groups

Open Space

Circulation

PLACE AND SOCIAL ENGAGEMENT Social Group

Need

Place

Exercise Child

Recreation

Sports Field

Women

Existing Slope

Accessibility Proposed Slope

Barrier-free access

Disabled

Communication Old

Plaza

PILOT SITE & METHODOLOGY WATER MANAGEMENT

REINFORCED FARMLAND

N

STRATEGY 1 -Local Access & Circulation -Proposed road system

SPORTS FIELDS STRATEGY 2 -Terrace as Framing Agent -Terraced landscape -Water management

GREEN LAND

PROPOSED BUILDING Greening Rate: 60% Building Density: 45% STRATEGY 3 -Self-built Housing Strategy -Housing platform -Incremental housing

local fabric

local fabric

local fabric

STRATEGY 4 -Open Space Reconfiguration -Green land -Water recreation -Urban farming -Sports field

EXISTING INFORMAL SETTLEMENT

STABLIZED SLOPE EXSITING HIGH-RISE STREET BUSINESS OPEN SPACE RETENTION POND INFORMAL SETTLEMENT Greening Rate: 30% Building Density: 35%

SELF MANAGED CONSTRUCTION -Terraced landscape -Water management

EXSITING HIGH-RISE Greening Rate: 30% Building Density: 60%

STRATEGY 5 -Propagation of Unit System -Circulation -Introduce landscape unit -Incremental Housing unit -Open space

TIME-BASED SCENARIO Existing

Proposed

Wet

Dry

Landslide Potential Self Managed Construction Wetland Rooftop Space

InsuďŹƒcient Opens Pace

Bioswale

Filtered Water Water Pollution

Rainwater Garden

Rainwater Garden

APPLICATION AND MEDIATION RETENTION POND

GREEN LAND

SPORTS FIELDS

REINFORCED FARMLAND OPEN SPACE

ROOFTOP FARMLAND

EXSITING HIGH-RISE WATER MANAGEMENT

STABLIZED SLOPE

SELF MANAGED CONSTRUCTION

EXISTING INFORMAL SETTLEMENT

WATER TREATMENT CISTERN

BRIDGE

CISTERN

CISTERN

BRIDGE

CISTERN FOR REUSE WATER SLOPE STABLIZATION

WATER TREATMENT

COMMUNITY EXTENSION

CISTERN FOR REUSE WATER

CISTERN

INCREMENTAL HOUSING SECTION

OPEN SPACE

WOOD LAND

CREEK

WATER INFILTRATION ROAD

WATER RECREATIONAL AREA

RAIN GARDEN

HOUSING

GREEN LAND

OPEN SPACE

ROAD