CN102535512A - Geogrid reinforcement lime soil retaining wall and construction method thereof - Google Patents
Geogrid reinforcement lime soil retaining wall and construction method thereof Download PDFInfo
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- CN102535512A CN102535512A CN2012100231933A CN201210023193A CN102535512A CN 102535512 A CN102535512 A CN 102535512A CN 2012100231933 A CN2012100231933 A CN 2012100231933A CN 201210023193 A CN201210023193 A CN 201210023193A CN 102535512 A CN102535512 A CN 102535512A
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Abstract
The invention discloses a geogrid reinforcement lime soil retaining wall and a construction method of the geogrid reinforcement lime soil retaining wall and belongs to the field of fixed buildings. The retaining wall comprises a concrete building block type wall panel, filling materials and a one-way plastic stretching geogrid, wherein the weight percentage of lime in the filling materials is 2 percent to 10 percent, the rest materials are soil, and the concrete building block type wall panel is an air bubble light concrete building block type wall panel. The construction method comprises the following steps that: (1) the substrate treatment is carried out, and in addition, stripped base casting groove positions are dug in advance; (2) concrete stripped bases are cast in situ; and (3) retaining wall construction is carried out. The dead weight of the filling materials can be reduced, the self stability is improved, and the requirement on the foundation carrying capability is reduced; the integral performance of the filling materials is enhanced, and the intensity is improved; the geogrid intensity damage can be reduced; and the material resources are wide, the materials can be obtained from local sources, and the manufacture cost is low.
Description
Technical field
The present invention relates to a kind of GSZ reinforcement rendzinas barricade and job practices thereof, belong to the fixed buildings field.
Background technology
Be used to support all kinds of cubic metre of earth and stone, limit and prevent that it from producing distortion, guarantee the stability of supported object, the building that self bears lateral earth pressure simultaneously is called barricade.Barricade is widely used in civil engineering industries such as highway, railway, water conservancies.
Reinforced earth is a kind of composite earth that in soil, adds reinforcement material and form.In soil, add the intensity that reinforcement material can improve the soil body, increase the stability of the soil body.Reinforced earth bulkhead is increasingly extensive in application in engineering at present; With respect to traditional form of structure such as gravity barricade; Reinforced earth bulkhead has following characteristics: panel and the reinforcement material of forming reinforced earth can be made in advance, and be on-the-spot with machinery (or artificial) placement in layers, this fabricated structure; Easy construction, quick, and save labour and reduction of erection time; Reinforced earth bulkhead belongs to the flexible structure thing, can adapt to the slight distortion of ground; Reinforced earth bulkhead has stronger shock resistance; The shingle nail of reinforced earth bulkhead can vertically be built by laying bricks or stones, can reduce occupation of land in a large number; The overall laying of retaining wall and the pattern pattern of panel can design according to surrounding environment characteristics and needs, and be handsome in appearance; The reinforced earth bulkhead cost is lower, compares with steel concrete gravity barricade and can reduce cost 40%, compares with barnacle gravity barricade and can practice thrift cost more than 20%.
In the design of reinforced earth bulkhead, the filler that ordinary priority is selected for use is a Coarse Aggregate, and construction costs is higher relatively.The cohesive soil fillers that adopt in the practical applications more, cohesive soil intensity low and meet water after the strength retrogression obvious.In addition,, make the reinforced earth bulkhead body produce bigger vertical sedimentation and horizontal distortion easily, influence the result of use of structure when on soft foundation, building because the deadweight of two kinds of fillers is bigger.These disadvantages affect applying of reinforced earth bulkhead.
Summary of the invention
The technical problem that the present invention will solve provides a kind of GSZ reinforcement rendzinas barricade and job practices thereof.Filler of the present invention can alleviate deadweight, improves self stability, reduces the requirement to bearing capacity of foundation soil; The filler overall performance strengthens, and intensity improves; Can reduce the strength damage of GSZ; Material source is extensive, can gather materials on the spot, and is cheap.
The technical scheme that the present invention taked is: a kind of GSZ reinforcement rendzinas barricade comprises concrete block formula shingle nail, filler and unidirectional plastic tensile GSZ; Concrete block formula shingle nail upper and lower surface is provided with rebate; The pre-buried GSZ of concrete block formula shingle nail, concrete block formula shingle nail are reserved GSZ rib complete more than outward, and the weight fraction of lime is 2%～10% in the filler, and all the other are soil; Concrete block formula shingle nail is a bubble lightweight concrete building block formula shingle nail.
The weight fraction of lime is 4%～8% in the preferred filler, and all the other are soil.
The weight fraction of lime is 6% in the preferred filler, and all the other are soil.
A kind of job practices of GSZ reinforcement rendzinas barricade may further comprise the steps:
(1) base treatment;
(2) cast-in-situ concrete strip foundation;
(3) barricade construction
A, on concrete bar shaped basis, build concrete block formula shingle nail by laying bricks or stones, concrete block formula shingle nail is a bubble lightweight concrete building block formula shingle nail;
B, press the said GSZ of design length cutting;
C, on basic end face, lay the unidirectional plastic tensile GSZ of first floor;
D, stretch-draw GSZ;
E, said filler vertically is poured on the basis of completing GSZ, leveling rolls, and filler is wanted layered rolling, and the degree of rolling will reach designing requirement, and the weight fraction of lime is 2%～10% in the filler, and all the other be native;
F, laying second layer GSZ;
G, repeat position, above step to barricade wall top.
The weight fraction of lime is 6% in preferred step (3) filler, and all the other are soil.
Thickness behind preferred every layer of filling compaction is 20～25cm, and density is 1.6～1.8 g/cm
3
Bubble mixing light concrete is that the foamed system through air bubble machine fully foams blowing agent with mechanical system, and foam is evenly mixed with cement paste, and the pumping system through foaming machine carries out cast-in-place forming then.
Adopt the beneficial effect that technique scheme produced to be:
(1) filler can alleviate deadweight, improves self stability and foundation capability
The general density of cohesive soil filler after compacting is at 2.0 g/cm
3About, the density of admixture 4～8% rendzinases after compacting is at 1.6～1.8 g/cm
3About, can reduce by 10%～20% filler deadweight.Can obviously reduce the deadweight of GSZ reinforced earth bulkhead like this, reduce the compressive strain of barricade self and ground, also reduce lateral earth pressure simultaneously the barricade shingle nail.
(2) the filler globality strengthens, and intensity improves
Generate the structure that water stability is good, have glued characteristic after composition reacts in lime and the soil.Therefore, can play the effect of " curing is hardened " after the soil body is improved through lime, the rendzinas globality is better, and intensity is improved.
Be in soil strength in the extraneous natural environment for a long time along with the continuity of time generally demonstrates the trend of decay, and the intensity of rendzinas has in time prolongation and cumulative trend, help the long-time stability of reinforced earth bulkhead.
(3) the rendzinas filler has protective effect to GSZ
Rendzinas is an alkalescent, can prevent extraneous CO
2, H
2Acidic materials such as S improve the long-term work performance of GSZ reinforced earth bulkhead to the erosion damage of GSZ.
(4) the raw material wide material sources are cheap, easy construction
Lime is the genius loci material, and the source is wide, price is cheap than Coarse Aggregate, easy to utilize.
(5) bubble lightweight concrete building block formula shingle nail bulk density is 300～1600kg/m
3, be equivalent to about 1/5～1/8 of portland cement concrete, can alleviate the whole building load.
The specific embodiment
Embodiment 1
A kind of GSZ reinforcement rendzinas barricade comprises concrete block formula shingle nail, filler and unidirectional plastic tensile GSZ.
The width of shingle nail is 50cm, highly is 25cm, and thickness is 20cm; Concrete block formula shingle nail upper and lower surface is provided with rebate; The GSZ that the pre-buried 7cm of concrete block formula shingle nail is above, concrete block formula shingle nail is reserved GSZ rib complete more than outward.
The weight fraction of lime is 6% in the filler, and all the other are soil;
Concrete block formula shingle nail is a bubble lightweight concrete building block formula shingle nail.
A kind of job practices of GSZ reinforcement rendzinas barricade may further comprise the steps:
(1) base treatment: on barricade design attitude leveling basis and roll, roll degree and bearing capacity and will reach designing requirement;
Dig pouring basin position, concrete bar shaped basis in advance along the barricade line style.
(2) cast-in-situ concrete strip foundation: cast-in-situ concrete strip foundation on said groove position, on concrete bar shaped basis, be provided with the tenon groove position of said shingle nail, the concrete bar shaped is provided with settlement joint on the basis, should be corresponding with the settlement joint of barricade.
(3) barricade construction
A, on concrete bar shaped basis with the mortar laminated concrete block formula shingle nail of building by laying bricks or stones, panel in the plane for the butt joint laid dry, build by laying bricks or stones at the facade higher slice.
B, by the said GSZ of design length cutting: the length after the said GSZ cutting will reach design length, and is the integral multiple of said GSZ longitudinal rib length;
C, laying the unidirectional plastic tensile GSZ of first floor on the basic end face: said GSZ is placed on the basic end face; The transverse ribs of said GSZ is parallel with said shingle nail, and the end cross rib of GSZ is linked to each other with the plastics pitman with the outer GSZ lacing wire rib of reserving of concrete block formula shingle nail.
D, stretch-draw GSZ: be stretched to GSZ and tighten, do not have lax, the free end of the said GSZ U shaped steel muscle nail with φ 8cm is fixed on the basis.
E, said filler vertically is poured on the basis of completing GSZ with loader; Flatten with bulldozer; For avoiding GSZ impaired in construction, forbid that crawler belt machinery directly is pressed on the GSZ, filler must topple over and cover GSZ earlier and be not less than the 15cm rear tool that is available on the machine.Filler is wanted layered rolling; The degree of rolling will reach designing requirement; Thickness behind every layer of filling compaction is 25cm, apart from adopting the halo vibratory roller more than the deadweight 18t rolling beyond the shingle nail 1.5m, rolls with the small-sized vibratory roller of interior employing deadweight less than 1t apart from shingle nail 1.5m.
F, laying second layer GSZ.
G, repeat position, above step to barricade wall top.
Embodiment 2
A kind of GSZ reinforcement rendzinas barricade comprises concrete block formula shingle nail, filler and unidirectional plastic tensile GSZ.
The width of shingle nail is 40cm, highly is 20cm, and thickness is 25cm; Concrete block formula shingle nail upper and lower surface is provided with rebate; The GSZ that the pre-buried 8cm of concrete block formula shingle nail is above, concrete block formula shingle nail is reserved GSZ rib complete more than outward.
The weight fraction of lime is 4% in the filler, and all the other are soil;
Concrete block formula shingle nail is a bubble lightweight concrete building block formula shingle nail.
A kind of job practices of GSZ reinforcement rendzinas barricade may further comprise the steps:
(1) base treatment: on barricade design attitude leveling basis and roll, roll degree and bearing capacity and will reach designing requirement;
Dig pouring basin position, concrete bar shaped basis in advance along the barricade line style.
(2) cast-in-situ concrete strip foundation: cast-in-situ concrete strip foundation on said groove position, on concrete bar shaped basis, be provided with the tenon groove position of said shingle nail, the concrete bar shaped is provided with settlement joint on the basis, should be corresponding with the settlement joint of barricade.
(3) barricade construction
A, on concrete bar shaped basis with the mortar laminated concrete block formula shingle nail of building by laying bricks or stones, panel in the plane for the butt joint laid dry, build by laying bricks or stones at the facade higher slice.
B, by the said GSZ of design length cutting: the length after the said GSZ cutting will reach design length, and is the integral multiple of said GSZ longitudinal rib length;
C, laying the unidirectional plastic tensile GSZ of first floor on the basic end face: said GSZ is placed on the basic end face; The transverse ribs of said GSZ is parallel with said shingle nail, and the end cross rib of GSZ is linked to each other with the plastics pitman with the outer GSZ lacing wire rib of reserving of concrete block formula shingle nail.
D, stretch-draw GSZ: be stretched to GSZ and tighten, do not have lax, the free end of said GSZ is fixed on the basis with timber wedge.
E, said filler vertically is poured on the basis of completing GSZ with loader; Flatten with bulldozer; For avoiding GSZ impaired in construction, forbid that crawler belt machinery directly is pressed on the GSZ, filler must topple over and cover GSZ earlier and be not less than the 15cm rear tool that is available on the machine.Filler is wanted layered rolling; The degree of rolling will reach designing requirement; Thickness behind every layer of filling compaction is 20cm, apart from adopting the halo vibratory roller more than the deadweight 18t rolling beyond the shingle nail 1.5m, rolls with the small-sized vibratory roller of interior employing deadweight less than 1t apart from shingle nail 1.5m.
F, laying second layer GSZ.
G, repeat position, above step to barricade wall top.
Embodiment 3
A kind of GSZ reinforcement rendzinas barricade comprises concrete block formula shingle nail, filler and unidirectional plastic tensile GSZ.
The width of shingle nail is 45cm, highly is 23cm, and thickness is 22cm; Concrete block formula shingle nail upper and lower surface is provided with rebate; The GSZ that the pre-buried 7cm of concrete block formula shingle nail is above, concrete block formula shingle nail is reserved GSZ rib complete more than outward.
The weight fraction of lime is 8% in the filler, and all the other are soil;
Concrete block formula shingle nail is a bubble lightweight concrete building block formula shingle nail.
A kind of job practices of GSZ reinforcement rendzinas barricade may further comprise the steps:
(1) base treatment: on barricade design attitude leveling basis and roll, roll degree and bearing capacity and will reach designing requirement;
Dig pouring basin position, concrete bar shaped basis in advance along the barricade line style.
(2) cast-in-situ concrete strip foundation: cast-in-situ concrete strip foundation on said groove position, on concrete bar shaped basis, be provided with the tenon groove position of said shingle nail, the concrete bar shaped is provided with settlement joint on the basis, should be corresponding with the settlement joint of barricade.
(3) barricade construction
A, on concrete bar shaped basis with the mortar laminated concrete block formula shingle nail of building by laying bricks or stones, panel in the plane for the butt joint laid dry, build by laying bricks or stones at the facade higher slice.
B, by the said GSZ of design length cutting: the length after the said GSZ cutting will reach design length, and is the integral multiple of said GSZ longitudinal rib length;
C, laying the unidirectional plastic tensile GSZ of first floor on the basic end face: said GSZ is placed on the basic end face; The transverse ribs of said GSZ is parallel with said shingle nail, and the end cross rib of GSZ is linked to each other with the plastics pitman with the outer GSZ lacing wire rib of reserving of concrete block formula shingle nail.
D, stretch-draw GSZ: be stretched to GSZ and tighten, do not have lax, the free end of the said GSZ U shaped steel muscle nail with φ 6cm is fixed on the basis.
E, said filler vertically is poured on the basis of completing GSZ with loader; Flatten with bulldozer; For avoiding GSZ impaired in construction, forbid that crawler belt machinery directly is pressed on the GSZ, filler must topple over and cover GSZ earlier and be not less than the 15cm rear tool that is available on the machine.Roll; Filler is wanted layered rolling; The degree of rolling will reach designing requirement; Thickness behind every layer of filling compaction is 23cm, apart from adopting the halo vibratory roller more than the deadweight 18t rolling beyond the shingle nail 1.5m, rolls with the small-sized vibratory roller of interior employing deadweight less than 1t apart from shingle nail 1.5m.
F, laying second layer GSZ.
G, repeat position, above step to barricade wall top.
Embodiment 4
A kind of GSZ reinforcement rendzinas barricade comprises concrete block formula shingle nail, filler and unidirectional plastic tensile GSZ.
The width of shingle nail is 50cm, highly is 20cm, and thickness is 25cm; Concrete block formula shingle nail upper and lower surface is provided with rebate; The GSZ that the pre-buried 7cm of concrete block formula shingle nail is above, concrete block formula shingle nail is reserved GSZ rib complete more than outward.
The weight fraction of lime is 30% in the filler, and all the other are soil;
Concrete block formula shingle nail is a bubble lightweight concrete building block formula shingle nail.
A kind of job practices of GSZ reinforcement rendzinas barricade may further comprise the steps:
(1) base treatment: on barricade design attitude leveling basis and roll, roll degree and bearing capacity and will reach designing requirement;
Dig pouring basin position, concrete bar shaped basis in advance along the barricade line style.
(2) cast-in-situ concrete strip foundation: cast-in-situ concrete strip foundation on said groove position, on concrete bar shaped basis, be provided with the tenon groove position of said shingle nail, the concrete bar shaped is provided with settlement joint on the basis, should be corresponding with the settlement joint of barricade.
(3) barricade construction
A, on concrete bar shaped basis with the mortar laminated concrete block formula shingle nail of building by laying bricks or stones, panel in the plane for the butt joint laid dry, build by laying bricks or stones at the facade higher slice.
B, by the said GSZ of design length cutting: the length after the said GSZ cutting will reach design length, and is the integral multiple of said GSZ longitudinal rib length;
C, laying the unidirectional plastic tensile GSZ of first floor on the basic end face: said GSZ is placed on the basic end face; The transverse ribs of said GSZ is parallel with said shingle nail, and the end cross rib of GSZ is linked to each other with the plastics pitman with the outer GSZ lacing wire rib of reserving of concrete block formula shingle nail.
D, stretch-draw GSZ: be stretched to GSZ and tighten, do not have lax, the free end of the said GSZ U shaped steel muscle nail with φ 6cm is fixed on the basis.
E, said filler vertically is poured on the basis of completing GSZ with loader; Flatten with bulldozer; For avoiding GSZ impaired in construction, forbid that crawler belt machinery directly is pressed on the GSZ, filler must topple over and cover GSZ earlier and be not less than the 15cm rear tool that is available on the machine.Roll; Filler is wanted layered rolling; The degree of rolling will reach designing requirement; Thickness behind every layer of filling compaction is 20cm, apart from adopting the halo vibratory roller more than the deadweight 18t rolling beyond the shingle nail 1.5m, rolls with the small-sized vibratory roller of interior employing deadweight less than 1t apart from shingle nail 1.5m.
F, laying second layer GSZ.
G, repeat position, above step to barricade wall top.
Embodiment 5
A kind of GSZ reinforcement rendzinas barricade comprises concrete block formula shingle nail, filler and unidirectional plastic tensile GSZ.
The width of shingle nail is 40cm, highly is 20cm, and thickness is 25cm; Concrete block formula shingle nail upper and lower surface is provided with rebate; The GSZ that the pre-buried 8cm of concrete block formula shingle nail is above, concrete block formula shingle nail is reserved GSZ rib complete more than outward.
The weight fraction of lime is 2% in the filler, and all the other are soil;
Concrete block formula shingle nail is a bubble lightweight concrete building block formula shingle nail.
A kind of job practices of GSZ reinforcement rendzinas barricade may further comprise the steps:
(1) base treatment: on barricade design attitude leveling basis and roll, roll degree and bearing capacity and will reach designing requirement;
Dig pouring basin position, concrete bar shaped basis in advance along the barricade line style.
(2) cast-in-situ concrete strip foundation: cast-in-situ concrete strip foundation on said groove position, on concrete bar shaped basis, be provided with the tenon groove position of said shingle nail, the concrete bar shaped is provided with settlement joint on the basis, should be corresponding with the settlement joint of barricade.
(3) barricade construction
A, on concrete bar shaped basis with the mortar laminated concrete block formula shingle nail of building by laying bricks or stones, panel in the plane for the butt joint laid dry, build by laying bricks or stones at the facade higher slice.
B, by the said GSZ of design length cutting: the length after the said GSZ cutting will reach design length, and is the integral multiple of said GSZ longitudinal rib length;
C, laying the unidirectional plastic tensile GSZ of first floor on the basic end face: said GSZ is placed on the basic end face; The transverse ribs of said GSZ is parallel with said shingle nail, and the end cross rib of GSZ is linked to each other with the plastics pitman with the outer GSZ lacing wire rib of reserving of concrete block formula shingle nail.
D, stretch-draw GSZ: be stretched to GSZ and tighten, do not have lax, the free end of said GSZ is fixed on the basis with timber wedge.
E, said filler vertically is poured on the basis of completing GSZ with loader; Flatten with bulldozer; For avoiding GSZ impaired in construction, forbid that crawler belt machinery directly is pressed on the GSZ, filler must topple over and cover GSZ earlier and be not less than the 15cm rear tool that is available on the machine.Roll; Filler is wanted layered rolling; The degree of rolling will reach designing requirement; Thickness behind every layer of filling compaction is 20cm, apart from adopting the halo vibratory roller more than the deadweight 18t rolling beyond the shingle nail 1.5m, rolls with the small-sized vibratory roller of interior employing deadweight less than 1t apart from shingle nail 1.5m.
F, laying second layer GSZ.
G, repeat position, above step to barricade wall top.
Claims (6)
1. a GSZ reinforcement rendzinas barricade comprises concrete block formula shingle nail, filler and unidirectional plastic tensile GSZ; Concrete block formula shingle nail upper and lower surface is provided with rebate; The pre-buried said GSZ of concrete block formula shingle nail, concrete block formula shingle nail are reserved said GSZ rib complete more than outward, and it is characterized in that: the weight fraction of lime is 2%～10% in the filler, and all the other are soil; Concrete block formula shingle nail is a bubble lightweight concrete building block formula shingle nail.
2. a kind of GSZ reinforcement rendzinas barricade as claimed in claim 1 is characterized in that the weight fraction of lime is 4%～8% in the filler, and all the other are soil.
3. a kind of GSZ reinforcement rendzinas barricade as claimed in claim 2 is characterized in that the weight fraction of lime is 6% in the filler, and all the other are soil.
4. the job practices of a kind of GSZ reinforcement rendzinas barricade as claimed in claim 1 may further comprise the steps:
(1) base treatment;
(2) cast-in-situ concrete strip foundation;
(3) barricade construction
A, on concrete bar shaped basis, build concrete block formula shingle nail by laying bricks or stones;
B, press the said GSZ of design length cutting;
C, on basic end face, lay the unidirectional plastic tensile GSZ of first floor;
D, stretch-draw GSZ;
E, said filler vertically is poured on the basis of completing GSZ, leveling rolls, and filler is wanted layered rolling, and the degree of rolling will reach designing requirement;
F, laying second layer GSZ;
G, repeat position, above step to barricade wall top; It is characterized in that the weight fraction of lime is 2%～10% in step (3) filler, all the other are soil; Concrete block formula shingle nail is a bubble lightweight concrete building block formula shingle nail.
5. a kind of GSZ reinforcement rendzinas barricade as claimed in claim 4 is characterized in that the weight fraction of lime is 6% in step (3) filler, and all the other are soil.
6. like claim 4 or 5 described a kind of GSZ reinforcement rendzinas barricades, it is characterized in that the thickness behind every layer of filling compaction is 20～25cm, density is 1.6～1.8 g/cm
3
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| CN2012100231933A CN102535512A (en) | 2012-02-02 | 2012-02-02 | Geogrid reinforcement lime soil retaining wall and construction method thereof |
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|---|---|---|---|
| CN2012100231933A CN102535512A (en) | 2012-02-02 | 2012-02-02 | Geogrid reinforcement lime soil retaining wall and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104480963A (en) * | 2014-12-26 | 2015-04-01 | 石家庄铁道大学 | Construction method of retaining wall by a prefabricated module panel geogrid reinforcement tailing sand |
| CN109056789A (en) * | 2018-09-14 | 2018-12-21 | 江苏科技大学 | A kind of retaining wall and its construction method |
| CN109208635A (en) * | 2018-11-16 | 2019-01-15 | 中建五局土木工程有限公司 | A kind of construction method of reinforced earth retaining wall structure and barricade |
| CN111778798A (en) * | 2020-07-20 | 2020-10-16 | 中国二十冶集团有限公司 | Roadbed construction method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104480963A (en) * | 2014-12-26 | 2015-04-01 | 石家庄铁道大学 | Construction method of retaining wall by a prefabricated module panel geogrid reinforcement tailing sand |
| CN109056789A (en) * | 2018-09-14 | 2018-12-21 | 江苏科技大学 | A kind of retaining wall and its construction method |
| CN109208635A (en) * | 2018-11-16 | 2019-01-15 | 中建五局土木工程有限公司 | A kind of construction method of reinforced earth retaining wall structure and barricade |
| CN111778798A (en) * | 2020-07-20 | 2020-10-16 | 中国二十冶集团有限公司 | Roadbed construction method |
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Application publication date: 20120704 |