WO2003074796A1 - Method of construction - Google Patents
Method of construction Download PDFInfo
- Publication number
- WO2003074796A1 WO2003074796A1 PCT/AU2003/000274 AU0300274W WO03074796A1 WO 2003074796 A1 WO2003074796 A1 WO 2003074796A1 AU 0300274 W AU0300274 W AU 0300274W WO 03074796 A1 WO03074796 A1 WO 03074796A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- foundation
- ground
- supporting
- beneath
- dropping
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
- E02D29/05—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
- E02D29/055—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench further excavation of the cross-section proceeding underneath an already installed part of the structure, e.g. the roof of a tunnel
Definitions
- the invention relates to a method of construction.
- the invention relates to a method of constructing and installing a structure, such as a building foundation.
- the method is particularly applicable to forming and positioning foundations on building sites and in particular on sites composed of soft ground material and/or where the effects of water are problematic and/or where extensive excavation would ordinarily be required.
- foundations for buildings are often constructed by excavating a site to a required depth, at which, settable material, such as concrete is laid.
- the foundations may take various forms depending on the composition of the ground on which the building is to be constructed, the design and function of the building and the height to which the building will extend.
- foundation piles are driven deep into the ground using a variety of known methods and a variety of pile designs, the particular method depending on at least some of the above factors.
- some piling methods utilise prefabricated pile shafts screwed into the bearing ground layer, such as those disclosed in United States Patent US 5,697,734 assigned to Beheersmaatschappij Verstraeten B.V.
- piles On sites where the ground is soft and/or there are problems with the presence of water in the area being excavated or where foundation piles are being driven, such as on many coastal sites or sites located near rivers or other bodies of water, piles sometimes have to be driven to enormous depths, and/or very deep excavations made, before a suitable bearing ground layer is reached. This is not only highly inefficient because of the time and expense associated with the need to excavate such huge volumes of material and/or to pile to such depths, but it is also potentially very dangerous for those working on the site. Furthermore, the stability of neighbouring sites and buildings are put at risk because of the inordinately deep excavations and/or piling.
- the invention resides in a method of construction including the steps of: a) positioning at least one support member; b) forming a foundation substantially adjacent the at least one support member; c) excavating ground beneath the foundation to a prescribed depth; and d) dropping the formed foundation to the prescribed depth.
- Step c) may further include the step of partially excavating the ground beneath the foundation to temporarily leave at least one supporting region of ground in contact with and supporting the foundation.
- a plurality of such supporting regions may be temporarily maintained beneath the foundation separated by excavated regions of ground.
- Dropping of the formed foundation may be guided by the at least one support member and/or a wall of the excavation created in step c).
- the method includes repeating steps c) and d) until a desired depth for the foundation is reached.
- a structure such as a wall or the like, may be constructed on one or more sections of the foundation.
- the at least one supporting member may be a pylon, a pile, a hollow tube, a hollow tube filled with settable material, a H-frame, a beam or the like.
- a plurality of supporting members is employed, one type or a combination of types of supporting members may be employed.
- the foundation may be formed in one or more segments, at least one support member being provided for each said segment.
- an expansion/contraction joint is provided between adjacent segments of the foundation.
- the wall created by step c) may be prevented from deflecting by one or more bracing means.
- a structure, such as a wall, formed on the foundation is prevented from deflecting by one or more bracing means.
- the bracing means is a bracing member, A-frame, beam or the like.
- FIG 1 shows a schematic plan view of a building site employing the method of the present invention
- FIG 1A is a schematic representation of an example of a joint between adjacent segments of foundation;
- FIG 2 shows a schematic representation of site excavation according to the present invention
- FIG 3 shows another schematic plan view of a building site employing the present invention
- FIG 4 shows a perspective view of a building site employing the method of the present invention
- FIG 5 shows the use of bracing means in the method of the present invention.
- FIG 6 is a sectional view of the building site shown in FIG 5.
- one or more support members 2 are positioned in the ground of the site.
- the support members may be foundation piles or pylons that are driven into the ground in accordance with a known method using known pylons.
- the pylons are preferably driven into the ground at locations corresponding to positions of pylons in the final building, such as around lift shafts and/or around or adjacent the perimeter of the finished building and similar significant load-bearing locations.
- the support members 2 may be formed from hollow tubes, such as lightweight cylinders or the like, that are driven or forced into the ground.
- the hollow tubes may be manoeuvred into position prior to filling the hollow tubes with concrete or other settable material.
- Such hollow tubes are often used in soft and/or sandy ground.
- the support members inserted or otherwise positioned in the ground may be simple beams or H-frames or similar, which are familiar to persons skilled in the art, and may be formed and positioned in the ground according to known techniques.
- a conventional foundation 4 made from, for example, settable material such as concrete, is constructed at the surface 5 of the site adjacent the one or more support members 2 in accordance with known techniques.
- the foundation 4 may be constructed around the perimeter of the ultimate location of the building, as shown in FIG 1 , or wherever the building foundation is required.
- the foundation may be L-shaped, cross- shaped or some other shape.
- the foundation may be constructed in sections, with adjacent sections interlocking with each other according to known methods.
- adjacent sections 4a and 4b of foundation may be stepped, as shown in FIG 1 A, with an expansion/contraction joint 6 between adjacent sections.
- the support members may be formed in the ground to conventional, relatively shallow depths, as discussed below.
- regions of earth constituting the site are then gradually excavated from beneath the foundation 4 to create cavities or voids 8, except at a number of strategic locations beneath the foundation, where linking or support bridges 10 of earth are maintained. Between support bridges 10, the earth is excavated substantially evenly to a specific depth. Earth is also excavated from region 11 adjacent the foundation 4, for example, to a width of about 100mm on one side of the foundation, as represented with the aid of the dotted line in FIG 1.
- support bridges 10 are then initially weakened by partially excavating the support bridges.
- the mass of the foundation above collapses the remaining material of the support bridges 10 causing the level of the foundation to drop in the direction of the arrows shown in FIG 2 to the new level of the excavated earth beneath.
- the orientation of the foundation 4 relative to the site is maintained by virtue of the limited, approximately 100mm wide, excavation on one side of the foundation, as described above, and by virtue of the one or more support members 2 on the other side of the foundation, both acting as guides for the foundation as it drops to the new level.
- Support members 2 are preferably provided for each section of foundation 4 to be dropped.
- supporting members 2 may be formed in, or otherwise inserted into, the ground to a depth of, for example, about 6 metres below the surface 5.
- the aforementioned specific depth to which the earth is excavated therefore corresponds to the new depth to which the foundation will be dropped. It will be appreciated that the method of the invention is not limited to these depths.
- the above excavation process may then be repeated to drop the foundation to a greater depth if required. This process can be continued until the desired foundation depth is achieved.
- bracing means such as supporting braces or bracing members 22, A-frames (not shown), beams or the like may be used to prevent walls 9 of the excavation adjacent the foundation, from deflecting. Walls 9 are shown in FIGS 2, 4 and 6.
- supporting bridges 10 and the number thereof beneath the foundation 4, or sections of foundation will depend on the dimensions and composition of the foundations and on the composition of the ground. Where harder ground material is present, the supporting bridges can afford to be narrower than the width of supporting bridges required with softer ground material. It will be appreciated that the method of the invention is not limited to support bridges 10 and/or voids 8 being of the same dimensions or being at regular intervals. These may differ according to, for example, ground conditions and foundation dimensions.
- the size of supporting bridges 10 may also increase with depth. For example, for a section of concrete foundation about 2 metres long and about 1.5 metres wide to be dropped to a depth of about 3 metres, a supporting bridge of, for example, approximately 1 metre wide and the same width as the foundation 4, located about the midpoint of the foundation, may be sufficient to support that section of foundation, depending on the composition of the ground material. If the foundation is to be dropped to greater depths, the width of supporting bridges 10 will need to be increased.
- Excavation of the supporting bridges may be facilitated by the use of suitably shaped excavating buckets (not shown).
- a bucket may have a width approximately the same as that of the supporting bridge with a substantially triangular cross-sectional shape.
- the shape of the bucket is such that more of the earth of the supporting bridges is removed at shallower depths closer to the foundation 4 than at deeper depths further away from the foundation. This causes the material of the supporting bridges to initially collapse closer to the foundation where the supporting bridge is weaker. The collapsing material to be excavated is then pushed out away from beneath the foundation. This method is particularly appropriate where the ground material is hard and potentially difficult to excavate.
- a structure such as a wall 12 formed from, for example, a course of bricks or blocks, or from settable material such as concrete, or other structure, may be formed on at least a portion of the foundation 4.
- the first level of wall 12 is already in place, preferably at least up to surface level 5, upon which the next level may be easily constructed. This obviates the need for workmen to work in confined and potentially dangerous subterranean spaces to construct the first stage of the walls on sunken foundations.
- supporting bridges 10 may have to be larger in order to temporarily support the foundation and structure above.
- Bracing means such as supporting braces or bracing members 22, A-frames (not shown), beams or the like, may be used to prevent deflection of walls 12.
- the site may be divided into segments, such as segments 14, 16, 18, and 20.
- Each section may comprise its own guiding supporting members 2 and foundation 4.
- the foundation 4 of each segment may itself be formed in sections, as described above.
- each segment can be excavated, as described above, at its own rate, independent of the excavation rate of other segments on the site if necessary.
- the foundations of each segment can then be dropped when the excavation in that segment is ready, thus allowing each segment of the site to proceed at its own rate. This avoids progress on the whole site being hindered by, for example, excavation difficulties encountered in only one other segment.
- FIGS 1 and 3 each supporting member being located approximately about the midpoint of each side of the foundation, a greater or lesser number of supporting members 2 may be utilized per foundation or per foundation section.
- the supporting members may also be positioned at alternative locations.
- the supporting members may alternatively be located outside the foundation perimeter, or a combination of inside and outside the perimeter.
- the locations of the supporting members may be influenced by factors such as the ground conditions, the type of foundation and/or the size and shape of the site.
- the method of the present invention addresses the aforementioned problems of the prior art in that it is not necessary that supporting members 2 be driven to enormous depths from the surface 5 of the site.
- the foundation 4, wall 12 or the like only needs to be constructed at the surface 5 and dropped to the desired depth relative to, and guided by, the supporting members and the excavation itself.
- excavation of the site is hugely simplified because only comparably small volumes of material need to be excavated at one time from the site to enable the foundation to be lowered a prescribed distance, before repeating the process as necessary. This avoids the prior art danger of having to excavate large volumes of material at one time, which increases the risk of collapse of the ground, the risk being amplified by the presence of soft/sandy ground material and/or the presence of water.
- the method of the present invention is more rapid than prior art methods because time is not wasted in driving piles, pylons or the like from the surface 5 to great depths.
- Supporting members 2 only need to be driven or otherwise inserted into the ground to a depth that is sufficient to support dropping of the foundation 4 to, for example, the first or second new level, which may occur at, for example, 3 metres and 6 metres respectively. If the foundation is to be dropped further, the supporting members can then be driven further into the ground. However, the supporting members will be further inserted from a level that is already, for example, 3 metres or 6 metres below the surface 5, making the piling or similar process easier.
- the present invention could be applied to the preparation and installation of structures such as walls, foundations and the like, for a wide range of constructions.
- the present invention is particularly useful for the foundations of tall buildings that require substantial foundations, especially in locations with soft and/or sandy require substantial foundations, especially in locations with soft and/or sandy conditions and/or where the presence of water is a problem.
- foundation 4 may be coupled to one or more support member 2, such as with a cable or the like coupled to foundation 4 and to a collar, the collar adapted to slide up and down support member 2 to restrain descent of the foundation once supporting bridges 10 have been removed.
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Foundations (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NZ535512A NZ535512A (en) | 2002-03-07 | 2003-03-07 | Method of construction by dropping foundation into excavation |
EP03704105A EP1488046A4 (en) | 2002-03-07 | 2003-03-07 | Method of construction |
US10/506,655 US6948885B2 (en) | 2002-03-07 | 2003-03-07 | Method for constructing foundation |
AU2003206504A AU2003206504B2 (en) | 2002-03-07 | 2003-03-07 | Method of construction |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPS0960A AUPS096002A0 (en) | 2002-03-07 | 2002-03-07 | Method of construction |
AUPS0960 | 2002-03-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003074796A1 true WO2003074796A1 (en) | 2003-09-12 |
Family
ID=3834558
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2003/000274 WO2003074796A1 (en) | 2002-03-07 | 2003-03-07 | Method of construction |
Country Status (6)
Country | Link |
---|---|
US (1) | US6948885B2 (en) |
EP (1) | EP1488046A4 (en) |
CN (1) | CN100443673C (en) |
AU (1) | AUPS096002A0 (en) |
NZ (1) | NZ535512A (en) |
WO (1) | WO2003074796A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106436760A (en) * | 2016-08-12 | 2017-02-22 | 武汉志和岩土工程有限公司 | Top-down construction method |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0305663D0 (en) * | 2003-03-12 | 2003-04-16 | Ultraframe Uk Ltd | Base for a building structure |
US8302357B1 (en) * | 2010-10-26 | 2012-11-06 | Kontek Industries, Inc. | Blast-resistant foundations |
JP6230414B2 (en) * | 2013-12-26 | 2017-11-15 | 株式会社竹中工務店 | Existing underground exterior wall removal method and building rebuilding method |
CN105386384B (en) * | 2015-12-01 | 2017-07-28 | 中国航空规划设计研究总院有限公司 | A kind of laying method of soft soil foundation hangar terrace |
CN106193120B (en) * | 2016-08-26 | 2018-04-06 | 杭州江润科技有限公司 | Basement is encorbelmented, and bottom plate is inverse to make structure and construction method |
CN106284411A (en) * | 2016-08-30 | 2017-01-04 | 河南城建学院 | The excavation method of sunk type subway station |
CN111827343B (en) * | 2020-07-28 | 2021-11-23 | 河北冀科工程项目管理有限公司 | Construction method for deepening four-wall support of existing building elevator foundation |
CN113700004B (en) * | 2021-09-10 | 2022-07-29 | 新宇建设有限公司 | Deep foundation pit combined support construction device and method thereof |
CN114016513B (en) * | 2021-10-26 | 2023-03-07 | 南京林业大学 | Time-sequence-sharing excavation method of complex foundation pit group supporting system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3716750A1 (en) * | 1987-05-19 | 1988-12-01 | Strabag Bau Ag | Method of constructing and sinking foundation structures |
JPH083986A (en) * | 1994-06-16 | 1996-01-09 | Ohbayashi Corp | Foundation structure of underground structure |
US5522676A (en) * | 1992-10-02 | 1996-06-04 | 998492 Ontario Inc. | Undercut excavation method |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1827921A (en) * | 1929-05-01 | 1931-10-20 | White Lazarus | Method of producing substructures for structures |
US3040411A (en) * | 1956-05-07 | 1962-06-26 | Charles B Messenger | Process of constructing a concrete support structure |
US3091938A (en) * | 1960-07-27 | 1963-06-04 | Jr Harry Schnabel | Method and structure for underpinning |
JPS6073916A (en) * | 1983-08-11 | 1985-04-26 | Hazama Gumi Ltd | Construction method for underground floor |
GB2219021B (en) * | 1988-04-27 | 1992-10-28 | Guardian Piling & Foundations | Improvements relating to underpinning |
US5123209A (en) * | 1990-12-07 | 1992-06-23 | Nally W T | Earth engineering apparatus and method |
NL9301176A (en) | 1993-07-05 | 1995-02-01 | Verstraeten Beheersmij Bv | Method for forming a foundation pile in the ground using a prefabricated pile shaft. |
JP2897663B2 (en) * | 1994-12-13 | 1999-05-31 | 株式会社大林組 | How to build underground structures |
CN1193065A (en) * | 1997-03-07 | 1998-09-16 | 石家庄市建设委员会 | Method of alternatively taking out soil for construction of underground engineering |
US6352390B1 (en) * | 2000-08-15 | 2002-03-05 | Robert L. Jones | Apparatus for lifting and supporting a foundation under tension and compression |
-
2002
- 2002-03-07 AU AUPS0960A patent/AUPS096002A0/en not_active Abandoned
-
2003
- 2003-03-07 NZ NZ535512A patent/NZ535512A/en unknown
- 2003-03-07 WO PCT/AU2003/000274 patent/WO2003074796A1/en active IP Right Grant
- 2003-03-07 US US10/506,655 patent/US6948885B2/en not_active Expired - Fee Related
- 2003-03-07 EP EP03704105A patent/EP1488046A4/en not_active Withdrawn
- 2003-03-07 CN CNB038054671A patent/CN100443673C/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3716750A1 (en) * | 1987-05-19 | 1988-12-01 | Strabag Bau Ag | Method of constructing and sinking foundation structures |
US5522676A (en) * | 1992-10-02 | 1996-06-04 | 998492 Ontario Inc. | Undercut excavation method |
JPH083986A (en) * | 1994-06-16 | 1996-01-09 | Ohbayashi Corp | Foundation structure of underground structure |
Non-Patent Citations (3)
Title |
---|
DATABASE WPI Derwent World Patents Index; Class Q42, AN 1996-094858/10 * |
PATENT ABSTRACTS OF JAPAN * |
See also references of EP1488046A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106436760A (en) * | 2016-08-12 | 2017-02-22 | 武汉志和岩土工程有限公司 | Top-down construction method |
Also Published As
Publication number | Publication date |
---|---|
NZ535512A (en) | 2005-05-27 |
EP1488046A1 (en) | 2004-12-22 |
EP1488046A4 (en) | 2005-11-23 |
CN100443673C (en) | 2008-12-17 |
US6948885B2 (en) | 2005-09-27 |
CN1639426A (en) | 2005-07-13 |
AUPS096002A0 (en) | 2002-03-28 |
US20050129465A1 (en) | 2005-06-16 |
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