AU2016200205B2 - Concrete Block Mat Installation by Gravity Flow - Google Patents
Concrete Block Mat Installation by Gravity Flow Download PDFInfo
- Publication number
- AU2016200205B2 AU2016200205B2 AU2016200205A AU2016200205A AU2016200205B2 AU 2016200205 B2 AU2016200205 B2 AU 2016200205B2 AU 2016200205 A AU2016200205 A AU 2016200205A AU 2016200205 A AU2016200205 A AU 2016200205A AU 2016200205 B2 AU2016200205 B2 AU 2016200205B2
- Authority
- AU
- Australia
- Prior art keywords
- concrete
- mould
- embankment
- fabric membrane
- blocks
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Abstract
Abstract Protection of marine embankments consisting of clay, silt, sand or coarser granular material against the erosive effect of water currents and wave action , by means of concrete block mattresses, cast in situ. The invention is characterized by casting the concrete mattress in situ, directly on an embankment by means of a casting mould, utilizing the earth's gravity as the principal driving force to mobilize the concrete for the mould filling process. Preferably the mould is shaped in such a manner that the concrete blocks, after removal of the mould, form a stepped profile, reducing the run-up height of waves. Preferably the mould, after some curing of the concrete, would be lifted off and, re-used for the purpose of casting subsequent, adjoining, mattresses. uN
Description
CONCRETE BLOCK MAT INSTALLATION BY GRAVITY FLOW
[0001] This is a divisional patent application, divided from Australian standard patent application 2007216706 filed on 11 September 2007.
Technical Field [0002] Protection of marine embankments consisting of clay, silt, sand or coarser granular material against the erosive effect of water currents and wave action, by means of concrete block mattresses, cast in situ.
Background Art [0003] Dikes, bund walls, foreshore linings and/or other forms of embankments can be protected against erosion caused by waves or currents by means of prefabricated concrete block mattresses.
[0004] This involves the transportation of the mattresses from the fabrication plant to the project site and the subsequent usage of a crane or other lifting device to install the mattresses on the embankment. It induces considerable time and costs to the extent that this solution is, in most cases, not cost-competitive in comparison to other embankment protection systems such as grout filled mattresses or rock linings.
[0005] A substantial reduction in overall cost can be accomplished by fabricating the concrete mattresses on site. This involves the placement of mould(s), made of steel or other rigid material, placed directly on the face of the embankment.
[0006] Traditionally, the concrete grout is deposited into the mould's cavities by means of a kibble suspended from a crane. This is a slow process and, as a consequence, the cost of this installation technique is relatively high.
Summary of Invention [0007] In one form the invention provides protection means against shore erosion comprising flexible concrete block mattress(es) cast in situ.
[0008] Preferably the protection means is provided with casting moulds shaped in such a manner that the force of gravity is effectively mobilized for the purpose of filling the mould(s) with concrete grout.
[0009] Preferably the protection means provides a concrete mattress cast onto a pre-installed fabric layer.
[0010] Preferably the concrete mattress comprises concrete blocks bonded to the fabric by means of a plurality of closely spaced synthetic loops protruding upward from the fabric layer into the base of the concrete blocks.
[0011] Preferably the protection means is formed by arranging the casting mould(s) shaped in such a manner that the concrete blocks form a stepped profile in a upslope direction, for the purpose of reducing the run-up height of waves.
[0012] Preferably the loop protruding upward from the fabric layer may be replaced by means of pins or other connection means to anchor the blocks to the fabric layer.
[0013] The invention is characterized by casting the concrete mattress in situ, directly on an embankment by means of a casting mould, utilizing the earth's gravity as the principal driving force to mobilize the concrete for the mould filling process.
[0014] Preferably the mould is shaped in such manner that the concrete blocks, after removal of the mould, form a stepped profile, reducing the run-up height of waves.
[0015] Preferably the mould, after some curing of the concrete, would be lifted off and, re-used for the purpose of casting subsequent, adjoining, mattresses.
[0016] In one aspect of the invention is concerned with a method of constructing such a concrete mattress whilst in another aspect the invention is concerned with a concrete mattress case in situ.
[0017] Specifically, in accordance with the invention there is provided a method of forming a protective barrier against wave erosion comprising arranging prefabricated mould sections on an embankment to form mould cavities in a pattern of rows and columns, pouring concrete into the mould cavities and allowing the concrete to flow downslope, overtopping parts of the mould sections, to fill the mould cavities.
[0018] Preferably the method includes a further step of vibrating the concrete without delay after pouring to cause the upper face to become almost horizontal, rendering a stepped profile in the concrete blocks that will form the protective barrier.
[0019] Preferably the prefabricated mould sections are removed after some curing of the concrete has taken place.
[0020] Preferably a fabric membrane is placed on the embankment prior to arranging the prefabricated mould sections on the embankment.
[0021] Preferably the fabric membrane has spaced connection means to penetrate the poured concrete that will form the concrete blocks, to bond the concrete blocks to the fabric membrane.
[0022] Preferably the connection means comprise spaced pins protruding upward from the surface of the fabric membrane.
[0023] As a further preferred alternative, the connection means comprise spaced loops tufted into the fabric membrane and protruding upward therefrom.
Brief Description of Drawings [0024] Figure 1 is a cross section of embankment, covered by fabric lining [0025] Figure 2 is similar to figure 1 with casting mould section(s) placed on top of the fabric lining. Also showing concrete grout 'launching' platform.
[0026] Figure 3 is similar to figure 2 with mould cavities filled with concrete grout.
[0027] Figure 4 is similar to figure 3 showing wave run-up situation.
[0028] Figure 5 shows a partial longitudinal section and transverse section of mould [0029] Figure 6 is a plan view of cast mattress after withdrawal of mould(s) [0030] Figure 7 is a partial cross section of concrete blocks, showing embedment of fabric loops.
Description of Embodiments [0031] A synthetic fabric membrane 1 is placed on embankment 2.
Subsequently, prefabricated mould section(s) 3 are placed on the fabric. This is followed by the depositing of concrete grout 4 onto 'launching' platform 5.
[0032] The slump of the concrete grout, prior to curing, is such that it is internally unstable. As a consequence the grout flows downslope, driven by the gravitational force as indicated by arrow 6. If necessary, this process can be speeded up by the use of shovels, rakes, skimmer beams or other mechanical devices or machines.
[0033] After filling of the moulds the concrete is vibrated without delay, by means of hand-held pencil vibrators or mechanical excitators attached to the mould(s) or by other techniques.
[0034] The supplied vibration energy causes the upper face 7 of the concrete 8 in the mould's cavity(s) 9 to become almost horizontal, rendering a 'stepped' blocks profile 10.
[0035] This has the beneficial effect of reducing run-up height 11 of wave(s) 12. As a consequence the design crest level 13 of the embankment can be lowered without increasing the volume of overtopping water during the design wave condition.
[0036] Longitudinal and transverse mould profiles 14 and 15 render a flexible mattress 16 consisting of a plurality of rigid blocks 17, arranged in a rectangular pattern of rows and columns. The blocks are connected to fabric underlayer 1 by means of a plurality of closely spaced synthetic loops 18 which are tufted into fabric 1 during the manufacturing process.
[0037] During the process of depositing and vibrating of the concrete, the loops penetrate into the base of the blocks, providing the required bonding strength between fabric and blocks. Instead of using loops, the required bonding strength can also be accomplished, at higher cost, by means of pins or other connection means.
[0038] Note: the invention is not limited to the application of the described fabric layer as a connection means between the concrete blocks, considering that in certain situations such layer would not be required.
Claims (7)
- The Claims Defining the Invention are as Follows1. A method of forming a protective barrier against wave erosion comprising arranging prefabricated mould sections on an embankment to form mould cavities in a pattern of rows and columns, pouring concrete into the mould cavities and allowing the concrete to flow downslope, overtopping parts of the mould sections, to fill the mould cavities.
- 2. The method as claimed in claim 1 including a further step of vibrating the concrete without delay after pouring to cause the upper face to become almost horizontal, rendering a stepped profile in the concrete blocks that will form the protective barrier.
- 3. The method of claim 1 or 2 wherein the prefabricated mould sections are removed after some curing of the concrete has taken place.
- 4. The method of any one of the preceding claims wherein a fabric membrane is placed on the embankment prior to arranging the prefabricated mould sections on the embankment.
- 5. The method of claim 4 wherein the fabric membrane has spaced connection means to penetrate the poured concrete that will form the concrete blocks, to bond the concrete blocks to the fabric membrane.
- 6. The method of claim 5 wherein the connection means comprise spaced pins protruding upward from the surface of the fabric membrane.
- 7. The method of claim 5 wherein the connection means comprise spaced loops tufted into the fabric membrane and protruding upward therefrom.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2016200205A AU2016200205B2 (en) | 2006-09-12 | 2016-01-13 | Concrete Block Mat Installation by Gravity Flow |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2006905241 | 2006-09-12 | ||
AU2006905241A AU2006905241A0 (en) | 2006-09-12 | Concrete block mat installation by gravity flow | |
AU2007216706A AU2007216706A1 (en) | 2006-09-12 | 2007-09-11 | Concrete Block Mat Installation by Gravity Flow |
AU2016200205A AU2016200205B2 (en) | 2006-09-12 | 2016-01-13 | Concrete Block Mat Installation by Gravity Flow |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2007216706A Division AU2007216706A1 (en) | 2006-09-12 | 2007-09-11 | Concrete Block Mat Installation by Gravity Flow |
Publications (2)
Publication Number | Publication Date |
---|---|
AU2016200205A1 AU2016200205A1 (en) | 2016-02-04 |
AU2016200205B2 true AU2016200205B2 (en) | 2018-07-19 |
Family
ID=39294247
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2007216706A Abandoned AU2007216706A1 (en) | 2006-09-12 | 2007-09-11 | Concrete Block Mat Installation by Gravity Flow |
AU2016200205A Ceased AU2016200205B2 (en) | 2006-09-12 | 2016-01-13 | Concrete Block Mat Installation by Gravity Flow |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2007216706A Abandoned AU2007216706A1 (en) | 2006-09-12 | 2007-09-11 | Concrete Block Mat Installation by Gravity Flow |
Country Status (1)
Country | Link |
---|---|
AU (2) | AU2007216706A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102493392A (en) * | 2011-12-09 | 2012-06-13 | 吴金栋 | BS (Bio-substrate)-FS (Foreshore) bio-substrate waterfront ecological protection system |
CN111794186B (en) * | 2020-08-10 | 2021-02-09 | 浩华环境科学有限责任公司 | Method for manufacturing bank protection embankment face structure in situ by using river and lake dredging sediment and product thereof |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996006984A1 (en) * | 1994-08-30 | 1996-03-07 | Keystone Retaining Wall System, Inc. | Embankment wall construction and method and block construction for making the same |
US5544973A (en) * | 1995-03-14 | 1996-08-13 | The United States Of America As Represented By The Secretary Of The Interior | Concrete step embankment protection |
US5902074A (en) * | 1996-11-05 | 1999-05-11 | Berkley; David M. | Apparatus and method for stabilizing sloped embankments |
-
2007
- 2007-09-11 AU AU2007216706A patent/AU2007216706A1/en not_active Abandoned
-
2016
- 2016-01-13 AU AU2016200205A patent/AU2016200205B2/en not_active Ceased
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996006984A1 (en) * | 1994-08-30 | 1996-03-07 | Keystone Retaining Wall System, Inc. | Embankment wall construction and method and block construction for making the same |
US5544973A (en) * | 1995-03-14 | 1996-08-13 | The United States Of America As Represented By The Secretary Of The Interior | Concrete step embankment protection |
US5902074A (en) * | 1996-11-05 | 1999-05-11 | Berkley; David M. | Apparatus and method for stabilizing sloped embankments |
Also Published As
Publication number | Publication date |
---|---|
AU2007216706A1 (en) | 2008-04-03 |
AU2016200205A1 (en) | 2016-02-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MK1 | Application lapsed section 142(2)(a) - no request for examination in relevant period | ||
NB | Applications allowed - extensions of time section 223(2) |
Free format text: THE TIME IN WHICH TO REQUEST EXAMINATION HAS BEEN EXTENDED TO 26 APR 2016 . |
|
FGA | Letters patent sealed or granted (standard patent) | ||
MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |