1) Underground houses can be built on sloping terrain by using different architectural approaches to address slope stability issues. 2) Key factors in the design of underground houses on slopes include the topography, soil type, groundwater level, and ensuring slope stability. 3) Different approaches for underground houses on slopes include denying the slopes, earthworks, cascade houses, embedded houses, and half-buried or fully underground houses. Stability analysis using methods like Sarma or Fellenius-Petterson is required.

1. STCET S7 2016 1
Underground houses on sliding lopes

2. STCET S7 2016 2
GUIDED BY : PRESENTED BY:
Mr. NAVEEN . A . P ALFI .C .ALI
ASST . PROFESSER S7 CE
CIVIL DEPT ROLL NO: 07
Underground houses on sliding slopes

3.  Low rise residential building adapt on any type of terrain
 Generally building houses on flat terrains
 Not applicable to areas with different topography
 Hilly areas often face slope stability problems
 Problems of hilly areas are
 Present surface with displacement
 Movement or collapse risk displacement
 Land slide
STCET S7 2016 3
Underground houses on sliding slopes

4.  The construction on slopes raises problems
regarding structural and architectural approach
 Mainly slope constructions are by securing a
backfill or excavation with retaining walls
 The cost of this extra work increases the total
construction cost
STCET S7 2016 4
Underground houses on sliding slopes

5.  Part of natural disasters, often they are produced involuntary by
men
 The reason for landslide
 Lose of stability due to increases load
 Decrement of resistance of earth to shear action
 Rise in underground water level
 Water pressure in pores
 Excavation
 Artificial vibration
 Earthquakes
 Sudden melting of snow
 Freeze and thaw phenomenon
STCET S7 2016 5
Underground houses on sliding slopes

6.  Criteria used for the classification of landslides
 Nature of the rock
 Depth of sliding surface
 Type of movement
 Position of the sliding surface to the earths stratification
 By the sliding speed
STCET S7 2016 6
Underground houses on sliding slopes

7. STCET S7 2016 7
Underground houses on sliding slopes

8.  Factors in the design process in underground or semi buried
houses
1. morphology of terrain
2. orientation towards the cardinal points
3.prevailing winds
4. wonderful views
5. existence of vegetation
6. size of the plot
7.urban or rural location
8.stratification the terrain
9.level of ground water
 Main factors consider is topography, the soil, level of
groundwater and neighbourhoods
STCET S7 2016 8
Underground houses on sliding slopes

9.  Denying the slopes
 Solving the elevation by the construction on silts ,together
with cantilever
 Minimal impact on natural terrain
 Also applied to terrain with very steep slopes
 Higher cost
 Require complex foundation system
STCET S7 2016 9
Underground houses on sliding slopes
Fig :Architectural approach on slopes-denying the slopes

10.  Earthwork
 Creating embankments and cutting
 Increasing the horizontal terrain
 Dealing with different denial of slopes
 Houses are closer to ground
 By levelling the terrain
 Excavation rises the cost and affect stability of slopes
STCET S7 2016 10
Underground houses on sliding slopes
Fig : Architectural approach on slopes - earthworks

11. STCET S7 2016 11
 Cascade houses and Embedded houses
1. Depending on the slopes of terrain and shape of slope
2. Levels are interlinked
3. Setting at different height
4.Excavation ,embankment and cutting volume are quite small
5. But required numerous stairs
6. More attention must be paid to the foundation system

Underground houses on sliding slopes
Fig : Architectural approach on slope –cascade house [L] , embedded house[R]

12. Half -buried and Underground houses
 Reduce the energy consumption that balance the interior
temperature
 In recessed, encapsulated houses the glazing is reduced to
only one elevation or even less
 Since the volume of house is deeper into ground, the
stability of sliding slope increases.
 It provide natural lighting and ventilation and create a
comfortable living space
STCET S7 2016 12
Underground houses on sliding slopes
Fig : Architectural approach on slope-half-buried and underground

13. STCET S7 2016 13
Different approaches for the plan of half buried and
underground houses on slopes
Underground houses on sliding slopes

14. STCET S7 2016 14
Underground houses on sliding slopes
Sliding house
Under ground house on slopes

15.  To perform stability analysis
 Slope having 50m length
 22 degree inclination
 Succession of soil layer
The ground water table is found in the layer of sand on the
inferior part, at -2.95m deep from ground level
STCET S7 2016 15
Underground houses on sliding slopes

16.  Most probably sliding surface occurs in the sandy layer
of soil
 Method
 Sarma method –slopes with polygonal sliding
surface
 Fellenius petterson method- slopes with circular
sliding surface
 Factor of safety for stability, Fs = 1.50
STCET S7 2016 16

17.  Homes that built underground, either partially or completely
 Europe , America, and Russia thousands of people live in
underground houses
 Misinformed belief that underground houses are dirty, damp,
dark, claustrophobic and unstable
 Due to lack of guidance and information about the building
regulation ,specification, lack of knowledge about their
potential as sustainable building
STCET S7 2016 17
Underground houses on sliding slopes

18. STCET S7 2016 18
Underground houses on sliding slopes
Under ground house
Underground hill house

19.  Design mainly consider the condition of soil
 soil type, topography, groundwater level, load bearing
property and slope stability –also considered
 construction material – water proof ,durable, strong to
withstand underground pressure
 Underground water is mainly considered , special drainage
techniques is need in sites and in roof areas
STCET S7 2016 19
Underground houses on sliding slopes

20.  Constructed cave
 Cut and cover or culvert homes
 Earth berm
 Elevational houses
 Atrium
 PSP –post –shoring - polyethylene
 Shaft
STCET S7 2016 20
Underground houses on sliding slopes

21. STCET S7 2016 21
Underground houses on sliding slopes
EARTH BERM HOME
CAVE HOME
CULVERT HOME

22.  Energy efficiency
 Less building material and labour
 Less property tax
 Warm in winter and cool in summer
 Cut down on atmospheric radiation
 Sound and more fire proof
 Less maintenances
 Better shelter from storms
STCET S7 2016 22
Underground houses on sliding slopes

23. Houses are unconventional and require
careful planning
Cannot built in a flood prone area
Significant care to keep out moisture
Require complex ventilation procedures
STCET S7 2016 23
Underground houses on sliding slopes

24. STCET S7 2016 24
EARTH SHELTERED HOUSE--
COSTWALD ENGLAND ROTHELL HOMES

25. STCET S7 2016 25
HOUSE GAZEBO
MARSHALL HOUSE

26.  Underground houses on sliding slopes are always
challenging
 Slope stability analysis should done and the slope
should be stable enough
 Cost is roughly 15% -25% more than regular homes
 Energy saving may be upward of 85% -90%
 Thus all other extra expenses overcomes in short
period
 To an extend underground homes are comfortable for
good living
STCET S7 2016 26
Underground houses on sliding slopes

27.  The Underground Space Centre, University of
Minnesota. Earth Sheltered Housing Design
 Wells.M the Underground design, brick houses
 Wells .M the Earth sheltered house
 Molnar I ,Ilies NM Popa A consolidation of an
active surface landslide
 Popa A Ilies N Chiorean.C.Utilization of analytical
methods in slope stability and consolidation
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Underground houses on sliding slopes

28. STCET S7 2016 28
Underground houses on sliding slopes