CN206625143U - A kind of high roadbed slab culvert flexibility off-load system - Google Patents

A kind of high roadbed slab culvert flexibility off-load system Download PDF

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Publication number
CN206625143U
CN206625143U CN201720225371.9U CN201720225371U CN206625143U CN 206625143 U CN206625143 U CN 206625143U CN 201720225371 U CN201720225371 U CN 201720225371U CN 206625143 U CN206625143 U CN 206625143U
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China
Prior art keywords
culvert
gsz
slab culvert
rubble
grouting
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CN201720225371.9U
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Inventor
郭震山
张清江
李文秀
郝卫国
彭振宇
邓洪宗
赵建斌
薛晓辉
姚广
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Shanxi Province Transport Science Research Institute
Shanxi Jiaoke Highway Survey and Design Institute
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Shanxi Province Transport Science Research Institute
Shanxi Jiaoke Highway Survey and Design Institute
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Abstract

The utility model belongs to Construction technology of expressway roadbed field, it is related to a kind of high roadbed slab culvert flexibility off-load system, the high roadbed slab culvert flexibility off-load system includes grouting rubble groove, bottom GSZ, top layer GSZ, flexible filler layer and Roadbed Soil；Be in the milk rubble groove being axially disposed within ground along slab culvert；Grouting rubble groove is two and parallel setting；The cement mortar filled out in grouting rubble groove filled with rubble and filling between rubble；Bottom GSZ is laid on the upper surface of ground and is fixedly connected with grouting rubble groove；Slab culvert is arranged on the upper surface of bottom GSZ；Top layer GSZ and flexible filler layer are successively set at the top of slab culvert from top to bottom；The top of top layer GSZ and the both sides of slab culvert are filled with Roadbed Soil.The utility model provides the high roadbed slab culvert flexibility off-load system of a kind of quality controllable, easy construction and wide adaptation range.

Description

A kind of high roadbed slab culvert flexibility off-load system
Technical field
The utility model belongs to Construction technology of expressway roadbed field, is related to a kind of high roadbed slab culvert flexibility off-load body System.
Background technology
In recent years, as the fast development of China's economy, and attention of the country to infrastructure construction, highway are built If enter period of flourishing.In the highway construction process of mountain area and Canal in Loess Area, cheuch area will be inevitably passed through, High-filled embankment is because its is easy for construction, short time limit and builds the advantages such as maintenance cost is low and is used widely.
At present, high roadbed culvert uses arch culvert form more.However, because arch culvert cast in situs difficulty of construction is larger, quality Unmanageable, under compared with high fill load action, the arch culvert that mass defect be present is contained in vivo and higher stress concentration and not be present The problems such as uniform settlement deforms, easily causes various different degrees of diseases, gently then culvert cracking, seepage or ponding, heavy then cause Culvert structure is destroyed, or even is collapsed, influences the normal use of highway.The arch culvert construction and maintenance cycle is longer simultaneously, engineering Invest larger.And relative to arch culvert, slab culvert have construction technology is simple, the construction time is short, low cost and can batch prefabricated, quality The advantages that controllable, but due to it, mid span moment, deformation are larger under compared with high fill load action, and high roadbed is applied to by limitation In roadbed.
To reduce the stress deformation of slab culvert, common practice is to increase the thickness of slab culvert structure, this way at present Not only increase construction investment, economy is poor, and in the higher high-filled embankment of overlying filled load and does not apply to.Therefore, A kind of slab culvert off-load system of economical rationality is found, so that slab culvert can apply to have important work in high-fill roadbed Journey practical significance, can not only reduce difficulty of construction, ensure construction quality, at the same can also accelerating construction progress, reduce construction investment.
Utility model content
To solve the above problems, the utility model provides a kind of quality controllable, easy construction and wide adaptation range High roadbed slab culvert flexibility off-load system.
To achieve the above object, the utility model adopts the following technical scheme that：
A kind of high roadbed slab culvert flexibility off-load system, it is characterised in that：The high roadbed slab culvert flexibility off-load system Including grouting rubble groove, bottom GSZ, top layer GSZ, flexible filler layer and Roadbed Soil；The grouting is broken Stone groove is axially disposed within ground along slab culvert；The grouting rubble groove is two；Two grouting rubble grooves are parallel Set；The cement mortar filled out in the grouting rubble groove filled with rubble and filling between rubble；The bottom GSZ It is laid on the upper surface of ground and is fixedly connected with grouting rubble groove；Slab culvert is arranged on the upper surface of bottom GSZ； The top layer GSZ and flexible filler layer are successively set at the top of slab culvert from top to bottom；The top layer GSZ Top and the both sides of slab culvert are filled with Roadbed Soil.
Preferably, central axis of the inner edge away from slab culvert of two grouting rubble grooves used by the utility model Horizontal range s meets following conditions：
Wherein：
tsFor culvert top plate thickness in slab culvert；
txFor culvert base plate thickness in slab culvert；
tcFor culvert side wall thicknesses in slab culvert；
H is clear height in culvert in slab culvert；
B is clear span in culvert in slab culvert；
The unit of the unit of the thickness, the unit of clear height or clear span is rice.
Preferably, high roadbed slab culvert flexibility off-load system is also broken including being embedded in grouting used by the utility model The pre-buried anchor studs of stone the top of the groove；The bottom GSZ is laid on the upper surface of ground and by pre-buried anchor studs with filling Slurry rubble groove is fixedly connected.
Preferably, bottom GSZ is fixed on the upper surface of ground by U-shaped nail used by the utility model.
Preferably, the depth of grouting rubble groove is 2.0~4.5m used by the utility model；The grouting rubble The width of groove is 0.8~2.0m.
Preferably, the maximum particle diameter of the rubble of filling is no more than in grouting rubble groove used by the utility model 100mm, the clay content of the rubble of the interior filling of grouting rubble groove are not more than 5%.
Preferably, the tensile strength of bottom GSZ and top layer GSZ is not used by the utility model Less than 100kN/m；The fracture elongation of the bottom GSZ and top layer GSZ is no more than 5%；The bottom GSZ and top layer GSZ are one or more layers；When bottom GSZ and top layer GSZ are multilayers When, the spacing between adjacent two layers bottom GSZ or adjacent two layers top layer GSZ is 0.2~0.4m.
Preferably, flexible filler layer is loose earth layer, polystyrene (EPS) foamed plastics used by the utility model Layer, sawdust layer or junked tire layer；The compactness of the flexible filler layer is less than the compactness banketed around flexible filler layer.
The advantages of the utility model：
The utility model, which provides a kind of high roadbed slab culvert flexibility off-load system, includes grouting rubble groove, bottom geotechnique Grid, top layer GSZ, flexible filler layer and Roadbed Soil；Grouting rubble groove is axially disposed within ground along slab culvert In；The rubble groove that is in the milk is two；Two grouting rubble grooves are set parallel；Rubble and filling are filled with grouting rubble groove The slurries filled out between rubble；Bottom GSZ is laid on the upper surface of ground and is fixedly connected with grouting rubble groove；Lid Plate contains the upper surface for being arranged on bottom GSZ；Top layer GSZ and flexible filler layer are successively set on lid from top to bottom Plate contains top；The top of top layer GSZ and the both sides of slab culvert are filled with Roadbed Soil.The utility model passes through Groove is excavated in the ground of slab culvert both sides, rubble is backfilled and is in the milk, be formed in parallel with the reinforcing band of culvert trend, increase Culvert side foundation stiffness is added；The presence for containing top flexible filler layer reinforcement system simultaneously reduces culvert top soil body rigidity.In overlying height Under the effect of embankment soil pressure, due to culvert and the difference for containing side equivalent stiffness in vertical direction, culvert sedimentation is caused to be more than broken Stone grouting the top of the groove is banketed sedimentation, is acted on by the shearing friction between medium, and the filled load that part culvert undertakes will transmission Onto rubble grouting groove, so as to produce the soil arching effect using rubble grouting ditch as arch springing.Slab culvert is located at below the native line of apsides, contains Body is substantially subjected only to the filled load within the native line of apsides, greatly reduces slab culvert stress.In addition, contain top and contain bottom geotechnique's lattice " handbag effect " caused by grid, flexible filler lamination can be avoided real and cause Embankment Subsidence excessive, and can further reduce culvert Push up soil pressure.High roadbed slab culvert flexibility off-load system provided by the utility model makes slab culvert turn into applied to high-filled embankment May, there is the advantages of economical rationality, quality controllable, easy construction, wide adaptation range.
Brief description of the drawings
Fig. 1 is the cross section structure diagram of high roadbed slab culvert flexibility off-load system provided by the utility model；
Fig. 2 is the-culvert-ground mechanism of action schematic diagram that bankets；
Fig. 3 is soil arching effect schematic diagram caused by off-load system provided by the utility model；
Wherein：
1- grounds；2- grouting rubble grooves；31- bottom GSZs；32- top layer GSZs；The pre-buried anchor studs of 4-；5- Slab culvert；6- flexible filler layers；7- Roadbed Soils；8- soil arching effect contour lines.
Embodiment
With reference to specific embodiment to high roadbed slab culvert flexibility off-load system described in the utility model and construction Process is described further.
Referring to Fig. 1, the utility model provides a kind of high roadbed slab culvert flexibility off-load system, and the high roadbed slab culvert is soft Property off-load system include grouting rubble groove 2, bottom GSZ 31, top layer GSZ 32, flexible filler layer 6 and roadbed Banket 7；Be in the milk being axially disposed within ground 1 along slab culvert 5 of rubble groove 2；The rubble groove 2 that is in the milk is two；Two grouting Rubble groove 2 is set parallel；The cement mortar filled out in grouting rubble groove 2 filled with rubble and filling between rubble；Underearth Work grid 31 is laid on the upper surface of ground 1 and is fixedly connected with grouting rubble groove 2；Slab culvert 5 is arranged on bottom geotechnique's lattice The upper surface of grid 31；Top layer GSZ 32 and flexible filler layer 6 are successively set on the top of slab culvert 5 from top to bottom；Top layer The top of GSZ 32 and the both sides of slab culvert 5 are filled with Roadbed Soil 7.
The horizontal range s of central axis of the inner edge away from slab culvert 5 of two grouting rubble grooves 2 meets following conditions：
Wherein：
tsFor culvert top plate thickness in slab culvert 5；
txFor culvert base plate thickness in slab culvert 5；
tcFor culvert side wall thicknesses in slab culvert 5；
H is clear height in culvert in slab culvert 5；
B is clear span in culvert in slab culvert 5；
The unit of the unit of thickness, the unit of clear height or clear span is rice.
High roadbed slab culvert flexibility off-load system also includes the pre-buried anchor studs 4 for being embedded in the top of grouting rubble groove 2；Bottom Layer GSZ 31 is laid on the upper surface of ground 1 and is fixedly connected by pre-buried anchor studs 4 with grouting rubble groove 2.
Bottom GSZ 31 is fixed on the upper surface of ground 1 by U-shaped nail.
The depth of grouting rubble groove 2 is 2.0~4.5m；The width of grouting rubble groove 2 is 0.8~2.0m.
The maximum particle diameter of the rubble of filling is no more than 100mm in grouting rubble groove 2, the 2 interior filling of grouting rubble groove The clay content of rubble is not more than 5%.
Waterglass and UEA swelling agents can preferably be mixed by being filled in grouting rubble groove 2 in the cement mortar filled out；Waterglass Weight ratio with cement mortar is 1%~3%；The weight of UEA swelling agents and cement mortar ratio is 8%~10%；Water in cement mortar Gray scale scope is 0.45~0.8.
The tensile strength of bottom GSZ 31 and top layer GSZ 32 is not less than 100kN/m；Bottom geotechnique's lattice The fracture elongation of grid 31 and top layer GSZ 32 is no more than 5%；Bottom GSZ 31 and top layer GSZ 32 be one or more layers；When bottom GSZ 31 and top layer GSZ 32 are multilayers, adjacent two layers underearth Spacing between work grid 31 or adjacent two layers top layer GSZ 32 is 0.2~0.4m.
Flexible filler layer 6 is loose earth layer, polystyrene (EPS) foam layer, sawdust layer or junked tire layer；It is flexible The compactness of packing layer 6 is less than the compactness banketed around flexible filler layer.
Based on high roadbed slab culvert flexibility off-load system provided by the utility model when being constructed, including following step Suddenly：
1) construction lofting, the position of culvert axis and grouting rubble groove 2 in base position, slab culvert 5 is accurately released；
2) grouting rubble groove 2 is excavated using hand fit's excavator；
3) rubble is backfilled into grouting rubble groove 2, and carries out slip casting, form rubble consolidation by grouting area；It is in the milk in rubble The advance embedding pre-buried anchor studs 4 in the upper surface of stabilization zone；
4) bottom GSZ 31 is laid in the upper surface of ground 1, the upper surface of ground 1 is fixed on by U-shaped nail；Pass through The pre-buried anchor studs 4 being embedded in grouting rubble groove 2 are fixed；
5) basis, abutment body, platform cap and the cover plate construction of slab culvert 5 are carried out；
6) after the culvert body concrete strength of slab culvert 5 reaches the 80% of design strength, Roadbed Soil 7 is backfilled to culvert Top；When containing platform both sides during backfill, while symmetrical progress, placement in layers, compaction in layers, every layer of filled slope are not more than 20cm, press Solidity reaches more than 95%；
7) containing top laying flexible filler layer 6 to design height, and the Roadbed Soil 7 for containing top both sides is backfilled to flexibility and filled out The top of the bed of material 6；
8) in the top of flexible filler layer 6 laying top layer GSZ 32；
9) continue backfilled roadbed supported to banket 7 until to grade elevation.
Realization principle of the present utility model is：
Culvert-banket-ground cooperation mechanism is as shown in Fig. 2 M in figure12And K12Respectively contain matter of being banketed directly over top Amount and rigidity, M11、M13And K11、K13Respectively contain top both sides quality of filling soil；M22And K22The respectively quality and rigidity of culvert, M21、M23And K21、K23Respectively culvert platform back of the body both sides quality of filling soil and rigidity；M32And K32Respectively contain the matter for just descending ground in bottom Amount, M31、M33And K31、K33Respectively contain the quality and rigidity of bottom both sides ground.τ1、τ2Represent to contain respectively push up inside and outside earth pillar body it Between shearing friction power.
When culvert does not do off-load measure processing, banketed rigidity, i.e. K because culvert rigidity is more than culvert platform back of the body both sides11= K13<K22, now culvert both sides vertical displacement of banketing is more than culvert, passes through the shearing friction power contained inside and outside top between earth pillar and act on, will Load is delivered to culvert top, and it is larger to cause to contain the soil pressure received of bearing responsibility, and produces stress concentration phenomenon, under larger load action, Slab culvert span centre stress deformation is larger, contains climax destruction easy to crack, therefore slab culvert may not apply in high-fill roadbed.And this A kind of high roadbed slab culvert flexibility off-load system that utility model provides, increased by excavating grouting rubble groove 2 in ground The rigidity of culvert both sides grounds, i.e. K31=K33>K32；And filled out by being reduced in culvert top laying flexible filler layer above culvert top Native rigidity, i.e. K11=K13>K22.Now, the equivalent stiffness of culvert vertical direction, which is less than, contains side, under the effect of overlying filled load Culvert sedimentation is banketed more than both sides, by shearing friction effect between the soil body by the part soil pressure load transfer above culvert to broken On stone grouting groove, soil arching effect of the groove as arch springing is reinforced using rubble so as to produce, as shown in Figure 3.Slab culvert 5 encircles positioned at soil Below line, be substantially subjected only to soil arch in loose ground compressive load, substantially reduce culvert stress deformation, make slab culvert 5 should It is possibly realized for high-filled embankment.
Embodiment 1
Referring to Fig. 1, a kind of high roadbed slab culvert flexibility off-load system provided by the utility model, the system includes being laid in By flexible filler at the top of grouting rubble groove 2 in ground, the bottom GSZ 31 for being layed in foundation surface and slab culvert The flexible reinforcement system that layer 6 and top layer GSZ 32 form.
Wherein, clear height 3m in slab culvert 5, interior clear span 4m, top plate thickness 0.25m, base plate thickness 0.5m, side wall thicknesses 0.3m。
The rubble groove 2 that is in the milk moves towards parallel to the culvert of slab culvert 5, and the width of grouting rubble groove 2 is 1.5m, and depth is 3m。
Horizontal range of the inner edge away from the central axis of slab culvert 5 of rubble groove 2 of being in the milk is 4.8m.
The maximum particle diameter of rubble is no more than 100mm, and clay content is not more than 5%.
Slurries use cement mortar, and mix 2.5% waterglass, mix 9% UEA swelling agents, the ratio of mud 0.55.
Bottom GSZ 31 and top layer GSZ 32 are laid using individual layer, and its tensile strength is 175kN/m, are broken Elongation percentage is split for 4.5%.
Flexible filler layer 6 uses junked tire, energy-conserving and environment-protective, resource reutilization.
High roadbed slab culvert flexibility off-load system provided by the utility model, its construction procedure are as follows：
1) construction lofting, base position, culvert axis and the position of grouting rubble groove 2 are accurately released.
2) grouting rubble groove 2 is excavated using hand fit's excavator.
3) rubble is backfilled into rubble ditch, and carries out slip casting, forms rubble consolidation by grouting area.
4) bottom GSZ 31 is laid, and the pre-buried anchor studs 4 by being embedded in grouting rubble groove 2 are consolidated It is fixed.
5) basis, abutment body, platform cap and the cover plate construction of slab culvert 5 are carried out.
6) after the culvert body concrete strength of slab culvert 5 reaches the 80% of design strength, Roadbed Soil 7 is backfilled to culvert Top.Contain platform both sides during backfill simultaneously symmetrical to carry out, placement in layers, compaction in layers, every layer of filled slope is 20cm, and compactness should Reach more than 95%.
7) containing top laying junked tire to design height, and the Roadbed Soil 7 of culvert top both sides is backfilled to flexible filler Layer top.
8) top layer GSZ 32 is laid.
9) embankment is continued to grade elevation.
The utility model backfills rubble and is in the milk, formed flat by excavating groove in the ground of slab culvert both sides Row adds in the reinforcing band of culvert trend and contains side foundation stiffness；The presence for containing top flexible filler layer reinforcement system simultaneously reduces Contain top soil body rigidity.Under the effect of overlying high roadbed soil pressure, because culvert is with containing side equivalent stiffness in vertical direction Difference, cause culvert sedimentation to be more than rubble grouting the top of the groove and banket sedimentation, the shearing friction passed through between medium acts on, part culvert The filled load that hole undertakes will be delivered on rubble grouting groove, so as to produce the soil arching effect using rubble grouting ditch as arch springing. Slab culvert is located at below the native line of apsides, contains the filled load that body is substantially subjected only within the native line of apsides, greatly reduces slab culvert stress. In addition, caused by containing top and culvert bottom GSZ " handbag effect ", flexible filler lamination can be avoided real and cause embankment to sink Drop it is excessive, and can further reduce culvert top soil pressure.High roadbed slab culvert flexibility off-load system provided by the utility model makes lid Plate is contained to be possibly realized applied to high-filled embankment, has the advantages of economical rationality, quality controllable, easy construction, wide adaptation range.
Finally illustrate, above example is merely to illustrate the technical solution of the utility model and unrestricted, all to this Utility model technical scheme carries out equivalent modifications or equivalent substitution, without departing from the objective and scope of technical solutions of the utility model , it should all belong in the range of the utility model covers.

Claims (7)

  1. A kind of 1. high roadbed slab culvert flexibility off-load system, it is characterised in that：The high roadbed slab culvert flexibility off-load system bag Include grouting rubble groove (2), bottom GSZ (31), top layer GSZ (32), flexible filler layer (6) and Roadbed Soil (7)；Described grouting rubble groove (2) being axially disposed within ground (1) along slab culvert (5)；It is described grouting rubble groove (2) be Two；Two grouting rubble grooves (2) are set parallel；Filled out in the grouting rubble groove (2) filled with rubble and filling broken Cement mortar between stone；The bottom GSZ (31) is laid on the upper surface of ground (1) and with being in the milk rubble groove (2) admittedly Fixed connection；Slab culvert (5) is arranged on the upper surface of bottom GSZ (31)；The top layer GSZ (32) and flexibility are filled out The bed of material (6) is successively set at the top of slab culvert (5) from top to bottom；The top of the top layer GSZ (32) and slab culvert (5) both sides are filled with Roadbed Soil (7).
  2. 2. high roadbed slab culvert flexibility off-load system according to claim 1, it is characterised in that：Described two grouting rubbles The horizontal range s of central axis of the inner edge of groove (2) away from slab culvert (5) meets following conditions：
    <mrow> <mn>0</mn> <mo>&amp;le;</mo> <mi>s</mi> <mo>-</mo> <msqrt> <mrow> <msup> <mrow> <mo>(</mo> <msub> <mi>t</mi> <mi>s</mi> </msub> <mo>+</mo> <mi>h</mi> <mo>+</mo> <msub> <mi>t</mi> <mi>x</mi> </msub> <mo>)</mo> </mrow> <mn>2</mn> </msup> <mo>+</mo> <msup> <mrow> <mo>(</mo> <mi>b</mi> <mo>/</mo> <mn>2</mn> <mo>+</mo> <msub> <mi>t</mi> <mi>c</mi> </msub> <mo>)</mo> </mrow> <mn>2</mn> </msup> </mrow> </msqrt> <mo>&amp;le;</mo> <mn>0.8</mn> <mi>m</mi> </mrow>
    Wherein：
    tsFor culvert top plate thickness in slab culvert (5)；
    txFor culvert base plate thickness in slab culvert (5)；
    tcFor culvert side wall thicknesses in slab culvert (5)；
    H is clear height in culvert in slab culvert (5)；
    B is clear span in culvert in slab culvert (5)；
    The unit of the unit of the thickness, the unit of clear height or clear span is rice.
  3. 3. high roadbed slab culvert flexibility off-load system according to claim 2, it is characterised in that：The high roadbed slab culvert Flexible off-load system also includes being embedded in the pre-buried anchor studs (4) at the top of grouting rubble groove (2)；The bottom GSZ (31) it is laid on the upper surface of ground (1) and is fixedly connected by pre-buried anchor studs (4) with grouting rubble groove (2).
  4. 4. high roadbed slab culvert flexibility off-load system according to claim 3, it is characterised in that：The bottom GSZ (31) upper surface of ground (1) is fixed on by U-shaped nail.
  5. 5. the high roadbed slab culvert flexibility off-load system according to claim 1 or 2 or 3 or 4, it is characterised in that：The filling The depth for starching rubble groove (2) is 2.0~4.5m；The width of the grouting rubble groove (2) is 0.8~2.0m.
  6. 6. high roadbed slab culvert flexibility off-load system according to claim 5, it is characterised in that：The grouting rubble groove (2) maximum particle diameter of the rubble of filling is no more than 100mm in.
  7. 7. high roadbed slab culvert flexibility off-load system according to claim 6, it is characterised in that：The bottom GSZ (31) and the tensile strength of top layer GSZ (32) is not less than 100kN/m；The bottom GSZ (31) and top The fracture elongation of layer GSZ (32) is no more than 5%；The bottom GSZ (31) and top layer GSZ (32) it is one or more layers；When bottom GSZ (31) and top layer GSZ (32) they are multilayers, adjacent two layers Spacing between bottom GSZ (31) or adjacent two layers top layer GSZ (32) is 0.2~0.4m.
CN201720225371.9U 2017-03-09 2017-03-09 A kind of high roadbed slab culvert flexibility off-load system Expired - Fee Related CN206625143U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106836034A (en) * 2017-03-09 2017-06-13 山西省交通科学研究院 A kind of high roadbed slab culvert flexibility off-load system and construction method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106836034A (en) * 2017-03-09 2017-06-13 山西省交通科学研究院 A kind of high roadbed slab culvert flexibility off-load system and construction method

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Inventor after: Guo Zhenshan

Inventor after: Zhang Qingjiang

Inventor after: Li Wenxiu

Inventor after: Hao Weiguo

Inventor after: Peng Zhenyu

Inventor after: Deng Hongzong

Inventor after: Zhao Jianbin

Inventor after: Xue Xiaohui

Inventor after: Yao Guang

Inventor before: Guo Zhenshan

Inventor before: Zhang Qingjiang

Inventor before: Li Wenxiu

Inventor before: Hao Weiguo

Inventor before: Peng Zhenyu

Inventor before: Deng Hongzong

Inventor before: Zhao Jianbin

Inventor before: Xue Xiaohui

Inventor before: Yao Guang

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20171110

Termination date: 20190309