CN109853313A - Pile foundation side soft soil foundation road eliminates frictional resistance structure and construction method - Google Patents

Pile foundation side soft soil foundation road eliminates frictional resistance structure and construction method Download PDF

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Publication number
CN109853313A
CN109853313A CN201910043063.8A CN201910043063A CN109853313A CN 109853313 A CN109853313 A CN 109853313A CN 201910043063 A CN201910043063 A CN 201910043063A CN 109853313 A CN109853313 A CN 109853313A
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China
Prior art keywords
soil layer
layer
frictional resistance
soft soil
pile
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Inventor
陈出新
李舒扬
黄理晨
钱勇佚
王振影
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Zhejiang Green Art Garden & Park Engineering Co Ltd
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Zhejiang Green Art Garden & Park Engineering Co Ltd
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Priority to CN201910043063.8A priority Critical patent/CN109853313A/en
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Abstract

The present invention relates to a kind of pile foundation side soft soil foundation roads to eliminate frictional resistance structure and construction method, belong to soft soil foundation road construction field, its structure includes being arranged under house or yard to constitute plurality of rows of more pile bases in soft soil foundation and the solidification soil layer of road is closed in more pile bases side, TGXG, base and supercrust are constituted, also in solidification soil layer, TGXG, base, supercrust jointly with separation layer is equipped between more pile bases for closing on, the separation layer makees vertically extending setting along link length direction, solidification soil layer is reduced or eliminated by separation layer, base, the supercrust frictional resistance with the more pile bases side closed on jointly, make supercrust with Soft Soil Layer and solidification soil layer uniform settlement, in conjunction with corresponding construction method, so that the present invention has simple structure, convenient construction, it is low-cost, the advantages that reliable in quality, therefore have higher Economic benefit and social benefit.

Description

Pile foundation side soft soil foundation road eliminates frictional resistance structure and construction method
Technical field
The present invention relates to a kind of soft soil foundation road construction fields, in particular to pile foundation side soft soil foundation road to eliminate frictional resistance Structure and construction method.
Background technique
House or yard on soft soil foundation is frequently with pile foundation, and settling amount is generally more small, but its periphery is closed on For the expense of saving, processing soft soil measure is simpler on road, often there is biggish differential settlement, but house or yard between the two Road joining place is closed on due to frictional resistance between the pile foundation under road surface, base and processing soft soil part and house or yard with periphery Presence, it is difficult to the road surface uniform settlement with the other end for closing on house or yard, the dished trend curve of shape, influence using And environmental beauty, or even damage pavement structure.
Summary of the invention
The technical problem to be solved by the present invention lies in overcoming the defects of the prior art and provides a kind of simple structure, construction Convenient, low-cost, reliable in quality pile foundation side soft soil foundation road eliminates frictional resistance structure and construction method.
Technical problem of the invention is achieved through the following technical solutions:
A kind of pile foundation side soft soil foundation road eliminates frictional resistance structure and construction method, including weak soil is arranged under house or yard Plurality of rows of more pile bases are constituted in base, which is the Soft Soil Layer for closing on road, is successively laid on the Soft Soil Layer Solidify soil layer, TGXG, base and supercrust, and solidify soil layer, TGXG, base, supercrust jointly with close on it is more Separation layer is equipped between pile base, which is to make vertically extending setting along link length direction, reduces or eliminates solidified earth Layer, base, the supercrust frictional resistance with the more pile bases side closed on jointly make supercrust with Soft Soil Layer and solidification soil layer Uniform settlement.
Described closes in road the total settlement for solidifying soil layer and Soft Soil Layer, calculated to simplify, close on road Road The settlement after construction of surface layer and base is ignored, the weight and vehicle of unit length supercrust and base as solidification soil layer and The load of Soft Soil Layer is;Assuming that solidifying the frictional resistance of soil layer, Soft Soil Layer jointly with the more pile bases side generation closed onWork Supercrust subsidence curve under is, by law of conservation of energy, loadLosses of potential energy and frictional resistanceFor always sinking DropMade function is equal, then closes on solidification soil layer and Soft Soil Layer total settlement in road, subsidence curve equationAnd frictional resistance PowerIt is calculated by following formula:
Formula one,
Solidify the total settlement of soil layer and Soft Soil Layer
Formula two,
Subsidence curve equation
Formula three,
Solidify the frictional resistance that soil layer, Soft Soil Layer are generated with the more pile bases side closed on jointly
Formula four,
Not set separation layer, i.e., when solidification soil layer, the practical frictional resistance of Soft Soil LayerWhen, subsidence curve is, practical frictional resistanceIt is caused solidify soil layer, Soft Soil Layer jointly with the non-settling height in more pile bases side etc. closed on In, it is desirable that
After separation layer is arranged, when solidification soil layer, the practical frictional resistance of Soft Soil LayerWhen, subsidence curve is, Practical frictional resistanceCaused soil layer, the Soft Soil Layer of solidifying is equal to the non-settling height in more pile bases side closed on jointly, it is desirable that
It can be seen that setting separation layer can be reduced until eliminating practical frictional resistanceI.e.Or, make practical frictional resistanceDraw Rise solidify soil layer, Soft Soil Layer jointly with the non-settling height in more pile bases side closed onOr, i.e. house or station Sedimentation and the other end road surface uniform settlement on road surface are closed in multiple rows of pile foundation side off field;
Each symbolic significance in formula one, formula two, formula three and formula four are as follows:
--- solidify the total settlement of soil layer and Soft Soil Layer, is equal to when practical frictional resistanceWhen solidify soil layer, weak soil Layer jointly with the non-settling height in more pile bases side closed on,
--- after setting separation layer, when solidification soil layer, the practical frictional resistance of Soft Soil LayerWhen solidify soil layer, weak soil Layer jointly with the non-settling height in more pile bases side closed on,
--- solidify soil layer, Soft Soil Layer and allow non-settling height with the more pile bases side closed on jointly,
--- with solidification soil layer and Soft Soil Layer characteristicWithRelated sedimentation transfer matrix;
--- Hankel transform parameter;
--- the thickness weight and vehicular load of unit length supercrust and base,
--- abscissa, the ordinate of the other end road surface starting point coordinate system of house or yard are respectively closed on,
--- solidify the subsidence curve coefficient of soil layer and Soft Soil Layer,
--- the width of supercrust and base,
--- solidify the sum of the thickness of soil layer, base and supercrust,
--- solidify the frictional resistance stress of the vertical surface of soil layer, base and supercrust,
--- solidify Young's modulus of elasticity, the Poisson's ratio of soil layer,, dimensionless;
--- the Young's modulus of elasticity of Soft Soil Layer, Poisson's ratio,, dimensionless.
The separation layer is more pile bases side and that closes on solidify between soil layer along link length direction subsection setup Heated bitumen and asphalt felt, the injection heated bitumen and pile foundation surface smooth contact are sprayed, frictional resistance is reduced, is repaved outside injection heated bitumen If 1~2 layer of asphalt felt;
The solidification soil layer be added on the spot in weak soil curing agent through uniform mixing, be rolled into the closely knit soil body again.
The TGXG is as the polypropylene of high molecular polymer, polyvinyl chloride through two dimension made of thermoplastic or molding Latticed geosynthetics.
The base is by delaying slag or mud knot crushed stone material is laid with.
The supercrust is paved by asphalt concrete pavement or block stone.
A kind of pile foundation side soft soil foundation road eliminates the construction method of frictional resistance structure, includes the following steps:
Solidify soil layer and Soft Soil Layer Step 1: calculatingWith
1. the curing agent ratio age compression strength of 7 day age and 28 day of different addition contents is tested, in the item for meeting design requirement It is preferable to determine curing agent mix ratios under part;
2. test determines the characterisitic parameter for solidifying soil layer and Soft Soil Layer;;
3. experimental test separation layer and solidifying the frictional resistance stress between soil layer, Soft Soil Layer, take measures to reduce frictional resistance stress Value;
4. calculating separately the frictional resistance for solidifying soil layer (3) and Soft Soil Layer (2) by formula one, formula three and formula fourWith, meetIt is required that;
Step 2: solidification weak soil
1. falling the cultivated plant soil on surface layer clearly;
2. segmentation 10m~20m is gradually excavated to the projected depth for solidifying soil layer with excavator, uniformly spread by curing agent mix ratio Curing agent is broadcast, and is stirred evenly weak soil and curing agent with power shovel;
Step 3: installation separation layer
1. being used between more pile bases side under house or yard in soft soil foundation and the solidification soil layer stirred evenly closed on Excavator is along road surface length direction segmentation 10m~20m excavation width 80cm~100cm, depth to the groove for solidifying soil layer bottom surface;
2. soil layer power shovel between more pile bases manually makes real, the corner angle concrete of pile foundation exposure beaten out with hammer or Grinding wheel polishes;
3. heating pitch to 800C~1000C sprays heated bitumen with the segmentation of pitch spray gun from below to up, is adhered to heated bitumen Native surface between pile foundation and pile foundation, thickness 1cm~2cm;
After 4. heated bitumen is cooled to room temperature, 1~2 layer of asphalt felt of broken-up laying soil adherency between pile foundation and more pile bases from below to up The surface of pitch, asphalt felt bottom 50cm~80cm folding be the horizontal weak soil top surface that is layered on is pushed down with solidified earth, by asphalt felt to Asphalt felt is temporarily fixed on more pile bases by upper tension, top with cement nail;It is connect along link length direction by several asphalt felts It is long, every mutual spreading overlap length 5cm~10cm of width asphalt felt;
After 5. every section of 10m~20m separation layer paves tension, the groove of excavation is full with solidification earthen backfill;
Step 4: rolling solidified earth and maintenance
1. after the completion of solidifying soil layer and separation layer, solidification soil layer need to tentatively be pressed with light-duty road roller etc. is mechanical within the 1d time It is real;
2. the volatilization of moisture and the influence of rainwater in solidification process in order to prevent spreads 1 layer of plastic film on the surface for solidifying soil layer Maintenance;
3. after 14d, with light-duty bull-dozer or manually being flattened to the surface layer for solidifying soil layer;
4. testing inspection solidifies soil quality, meet design requirement;
Step 5: being laid with TGXG
TGXG flattening is layered on solidified earth layer surface, each reserved pavement edge 80cm~100cm length in both ends, every width geotechnique Mutual connection overlap length 10cm~20cm of grid;
Step 6: filling base's pressure
1. filling first layer to delay slag or mud knot rubble 30cm~50cm, it is compacted with medium-sized road roller, compactness meets design requirement;
2. first layer is placed in the TGXG inflection of reserved pavement edge to delay slag or mud knot rubble top surface, continue to fill the second layer Delay slag or mud knot rubble 30cm~50cm, is compacted with medium-sized or large roller, until filling, being densified to design thickness, is compacted Degree meets design requirement;
Step 7: surfacing
1. extracting the cement nail being temporarily fixed on more pile bases at the top of asphalt felt;
2. the supercrust of making bituminous concrete paves block-stone pavement.
Compared with prior art, a kind of pile foundation side soft soil foundation road of major design of the present invention eliminates frictional resistance structure, should Structure is to constitute plurality of rows of more pile bases and road is closed in more pile bases side by being arranged under house or yard in soft soil foundation Solidify soil layer, TGXG, base and supercrust are constituted, also solidification soil layer, TGXG, base, supercrust jointly with face Separation layer is equipped between close more pile bases, which makees vertically extending setting along link length direction, subtract by separation layer Less or elimination solidifies the frictional resistance of soil layer, base, supercrust jointly with the more pile bases side closed on, and makes supercrust with Soft Soil Layer With solidification soil layer uniform settlement, in conjunction with corresponding construction method, so that the present invention has simple structure, convenient construction, expense The advantages that cheap, reliable in quality, therefore have high economic benefit and social benefit.
Detailed description of the invention
Fig. 1 is structural facades schematic diagram of the invention.
Fig. 2 is sedimentation and Force Calculation schema.
Specific embodiment
It will elaborate again by above-mentioned attached drawing to the embodiment of the present invention below.
As shown in FIG. 1 to FIG. 2,1. pile foundations, 2. Soft Soil Layers, 3. solidification soil layers, 4. TGXG, 5. bases, 6. supercrusts, 7. separation layer.
Pile foundation side soft soil foundation road eliminates frictional resistance structure and construction method, as shown in Figure 1, belonging to a kind of soft soil foundation road Road construction field, including setting constitute plurality of rows of more pile bases 1 under house or yard in soft soil foundation, which is The Soft Soil Layer 2 for closing on road is successively laid with solidification soil layer 3, TGXG 4, base 5 and supercrust 6 on Soft Soil Layer, and solidifies Soil layer 3, TGXG 4, base 5, supercrust 6 jointly with separation layer 7 is equipped between more pile bases 1 for closing on.
Wherein, solidification soil layer 3 is a kind of novel environment friendly road-making material, it is that curing agent is added on the spot in weak soil through uniform Mixing makes curing agent and weak soil carry out physics, chemical reaction, and weak soil is rolled into the closely knit soil body after solidifying again, it can improve soft The engineering properties such as compression strength, water stability, freezing stability and the compression reduction of soil are a kind of weak soils that comparison is simple and economic Measures of foundation treatment.
The TGXG 4 is a kind of main geosynthetics, by high molecular polymerizations such as polypropylene, polyvinyl chloride Object through two-dimensional mesh lattice-like material made of thermoplastic or molding, it enhancing soil body shearing resistance and reinforcement can be improved the globality of the soil body with Load force all has remarkable effect.
The base 5 has certain intensity, stability by delaying slag or mud knot crushed stone material is laid with;Described Supercrust 6 is paved by asphalt concrete pavement or block stone;The separation layer 7 is that 1~2 layer of asphalt felt and pitch form, The more pile bases and close between road surface, basis and solidified earth that length direction is vertically provided under house or yard along road surface;Cause This, just can be reduced or eliminate by separation layer 7 and solidify soil layer 3, base 5, supercrust 6 and rub jointly with more pile bases side for closing on Resistance, and make to solidify soil layer 3 and 2 uniform settlement of Soft Soil Layer.
Meanwhile the total settlement for solidifying soil layer 3 and Soft Soil Layer 2 is closed in road, calculate, closed in road in order to simplify Supercrust 6 and the settlement after construction of base 5 are ignored, and the weight and vehicle of unit length supercrust 6 and base 5 are as solidification The load of soil layer 3 and Soft Soil Layer 2 is;Assuming that solidifying what soil layer 3, Soft Soil Layer 2 were generated with the more pile bases side closed on jointly Frictional resistanceUnder the action of 6 subsidence curve of supercrust be, by law of conservation of energy, loadLosses of potential energy and frictional resistance PowerFor total settlementMade function is equal, then closes on 2 total settlement of solidification soil layer 3 and Soft Soil Layer in road, sedimentation it is bent Line equationAnd frictional resistanceIt is calculated by following formula:
Formula one,
Solidify the total settlement of soil layer 3 and Soft Soil Layer 2
Formula two,
Subsidence curve equation
Formula three,
Solidify the frictional resistance that soil layer 3, Soft Soil Layer 2 are generated with the more pile bases side closed on jointly
Formula four,
Not set separation layer 7, i.e., when solidification soil layer 3, the practical frictional resistance of Soft Soil Layer 2When, subsidence curve is, practical frictional resistanceIt is caused solidify soil layer 3, Soft Soil Layer 2 jointly with the non-settling height in more pile bases side closed on It is equal to, it is desirable that
After separation layer 7 is arranged, when solidification soil layer 3, the practical frictional resistance of Soft Soil Layer 2When, subsidence curve is, practical frictional resistanceIt is caused solidify soil layer 3, Soft Soil Layer 2 jointly with the non-settling height in more pile bases side closed on It is equal to, it is desirable that
It can be seen that setting separation layer 7 can be reduced until eliminating practical frictional resistanceI.e.Or, make practical frictional resistance It is caused solidify soil layer, Soft Soil Layer jointly with the non-settling height in more pile bases side closed onOr, i.e., house or Sedimentation and the other end road surface uniform settlement on road surface are closed in multiple rows of pile foundation side under yard;
Each symbolic significance in formula one, formula two, formula three and formula four are as follows:
--- solidify the total settlement of soil layer 3 and Soft Soil Layer 2, is equal to when practical frictional resistanceWhen solidification soil layer 3, Soft Soil Layer 2 jointly with the non-settling height in more pile bases side closed on,Calculation formula and method refering to related multiple-layer horizontal layer Shape settlement of foundation reckoner or document, such as " the total additional stress of horizontal layer ground and settlement calculation analyze (Luo Shiyi: Chang'an University's Master's thesis, 2003) ", it can also be determined by test,
--- after setting separation layer 7, when solidification soil layer 3, the practical frictional resistance of Soft Soil Layer 2When solidification soil layer 3, Soft Soil Layer 2 jointly with the non-settling height in more pile bases side closed on,
--- solidify soil layer 3, Soft Soil Layer 2 and allow non-settling height with the more pile bases side closed on jointly,
--- with solidification soil layer 3 and 2 characteristic of Soft Soil LayerWithRelated sedimentation transfer matrix, sees " water The flat total additional stress of stratified foundation and settlement calculation analysis (Luo Shiyi: Chang An University's Master's thesis, 2003) ";
--- Hunk that (Hankel) transformation parameter;
--- the thickness weight and vehicular load of unit length supercrust 6 and base 5,
--- abscissa, the ordinate of the other end road surface starting point coordinate system of house or yard are respectively closed on,
--- solidify the subsidence curve coefficient of soil layer 3 and Soft Soil Layer 2,
--- the width of supercrust 6 and base 5,
--- solidify the sum of soil layer 3, base 5 and thickness of supercrust 6,
--- solidify the frictional resistance stress of the vertical surface of soil layer 3, base 5 and supercrust 6,
--- solidify Young's modulus of elasticity, the Poisson's ratio of soil layer 3,, dimensionless;
--- the Young's modulus of elasticity of Soft Soil Layer 2, Poisson's ratio,, dimensionless.
In addition, pile foundation side soft soil foundation road eliminates the construction method of frictional resistance structure, mainly include the following steps:
Solidify soil layer and Soft Soil Layer Step 1: calculatingWith
1. the curing agent ratio age compression strength of 7 day age and 28 day of different addition contents is tested, in the item for meeting design requirement It is preferable to determine curing agent mix ratios under part;
2. test determines the characterisitic parameter for solidifying soil layer 3 and Soft Soil Layer 2
3. experimental test separation layer 7 and solidifying the frictional resistance stress between soil layer 3, Soft Soil Layer 2, take measures to reduce frictional resistance stressValue;
4. calculating separately the frictional resistance for solidifying soil layer 3 and Soft Soil Layer 2 by formula one, formula three and formula fourWith, symbol It closesIt is required that;
Step 2: solidification weak soil
1. falling the cultivated plant soil of surface layer 30cm or so clearly;
2. segmentation 10m~20m is gradually excavated to the projected depth for solidifying soil layer with excavator, uniformly spread by curing agent mix ratio Curing agent is broadcast, and is stirred evenly weak soil and curing agent with power shovel;
Step 3: installation separation layer
1. being used between more pile bases side under house or yard in soft soil foundation and the solidification soil layer stirred evenly closed on Excavator is along road surface length direction segmentation 10m~20m excavation width 80cm~100cm, depth to the groove for solidifying soil layer bottom surface;
2. soil layer power shovel between more pile bases 1 manually makes real, the corner angle concrete of pile foundation exposure is beaten out with hammer Or grinding wheel polishes;
3. heating pitch to 800C~1000C sprays heated bitumen with the segmentation of pitch spray gun from below to up, is adhered to heated bitumen Native surface between pile foundation 1 and pile foundation, thickness 1cm~2cm;
After 4. heated bitumen is cooled to room temperature, 1~2 layer of asphalt felt of broken-up laying soil adherency between pile foundation and more pile bases from below to up The surface of pitch, asphalt felt bottom 50cm~80cm folding be the horizontal weak soil top surface that is layered on is pushed down with solidified earth, by asphalt felt to Asphalt felt is temporarily fixed on more pile bases 1 by upper tension, top with cement nail;It can be by several asphalt felts along link length direction Spreading, every mutual spreading overlap length 5cm~10cm of width asphalt felt;
After 5. every section of 10m~20m separation layer 7 paves tension, the groove of excavation is full with solidification earthen backfill;
Step 4: rolling solidified earth and maintenance
1. after the completion of solidifying soil layer 3 and separation layer 7, solidification soil layer need to tentatively be pressed with light-duty road roller etc. is mechanical within the 1d time It is real;
2. the volatilization of moisture and the influence of rainwater in solidification process in order to prevent spreads 1 layer of plastic film on the surface for solidifying soil layer 3 Maintenance;
3. after 14d, with light-duty bull-dozer or manually being flattened to the surface layer for solidifying soil layer 3;
4. testing inspection solidifies 3 mass of soil layer, meet design requirement;
Step 5: being laid with TGXG
The flattening of TGXG 4 is layered on solidification 3 surface of soil layer, each reserved pavement edge 80cm~100cm length in both ends, every width soil Mutual connection overlap length 10cm~20cm of work grid 4;
Step 6: filling base's pressure
1. filling first layer to delay slag or mud knot rubble 30cm~50cm, it is compacted with medium-sized road roller, solidity meets design requirement;
2. first layer is placed in 4 inflection of TGXG of reserved pavement edge to delay slag or mud knot rubble top surface, continue to fill second Layer is delayed slag or mud knot rubble 30cm~50cm, is compacted with medium-sized or large roller, until filling, being densified to design thickness, is pressed Solidity meets design requirement;
Step 7: surfacing
1. extracting the cement nail being temporarily fixed on more pile bases 1 at the top of asphalt felt;
2. the supercrust 6 of making bituminous concrete paves block-stone pavement.
It is of the present invention that examples are only for illustrating the present invention and not for limiting the scope of the present invention.It should additionally manage Solution, after reading the content taught by the present invention, those skilled in the art can make various modifications or changes to the present invention, this In a little equivalent forms are also fallen within the scope of the appended claims of the present application.

Claims (8)

1. a kind of pile foundation side soft soil foundation road eliminates frictional resistance structure, including setting is constituted in soft soil foundation under house or yard Plurality of rows of more pile bases (1), more pile bases side are the Soft Soil Layer (2) for closing on road, it is characterised in that the Soft Soil Layer (2) On be successively laid with solidification soil layer (3), TGXG (4), base (5) and supercrust (6), and solidification soil layer (3), TGXG (4), base (5), supercrust (6) are equipped with separation layer (7) between more pile bases (1) for closing on jointly, which is along road Road length direction makees vertically extending setting, reduces or eliminates solidification soil layer (3), base (5), supercrust (6) face with described jointly The frictional resistance of close more pile bases side makes supercrust (6) with Soft Soil Layer (2) and solidification soil layer (3) uniform settlement.
2. pile foundation side soft soil foundation road according to claim 1 eliminates frictional resistance structure, it is characterised in that described closes on Solidify the total settlement of soil layer (3) and Soft Soil Layer (2) in road, calculated to simplify, close on supercrust in road (6) and base (5) settlement after construction is ignored, and the weight and vehicle of unit length supercrust (6) and base (5) are as solidification soil layer (3) Load with Soft Soil Layer (2) is;Assuming that solidifying what soil layer (3), Soft Soil Layer (2) were generated with the more pile bases side closed on jointly Frictional resistanceUnder the action of supercrust (6) subsidence curve be, by law of conservation of energy, loadLosses of potential energy with rub ResistanceFor total settlementMade function is equal, then closes on solidification soil layer (3) and Soft Soil Layer (2) total settlement in road、 Subsidence curve equationAnd frictional resistanceIt is calculated by following formula:
Formula one,
Solidify the total settlement of soil layer (3) and Soft Soil Layer (2)
Formula two,
Subsidence curve equation
Formula three,
Solidify the frictional resistance that soil layer (3), Soft Soil Layer (2) are generated with the more pile bases side closed on jointly
Formula four,
Not set separation layer (7), i.e., when solidification soil layer (3), Soft Soil Layer (2) practical frictional resistanceWhen, subsidence curve For, practical frictional resistanceCaused soil layer (3), the Soft Soil Layer (2) of solidifying does not sink with the more pile bases side closed on jointly Drop height is equal to, it is desirable that
After separation layer (7) are arranged, when solidification soil layer (3), Soft Soil Layer (2) practical frictional resistanceWhen, subsidence curve is, practical frictional resistanceCaused soil layer (3), the Soft Soil Layer (2) of solidifying does not settle with the more pile bases side closed on jointly Height is equal to, it is desirable that
It can be seen that setting separation layer (7) can be reduced until eliminating practical frictional resistanceI.e.Or, make practical frictional resistance It is caused solidify soil layer, Soft Soil Layer jointly with the non-settling height in more pile bases side closed onOr, i.e., house or Sedimentation and the other end road surface uniform settlement on road surface are closed in multiple rows of pile foundation side under yard;
Each symbolic significance in formula one, formula two, formula three and formula four are as follows:
--- solidify the total settlement of soil layer (3) and Soft Soil Layer (2), is equal to when practical frictional resistanceWhen solidify soil layer (3), Soft Soil Layer (2) jointly with the non-settling height in more pile bases side closed on,
--- after setting separation layer (7), when solidification soil layer (3), Soft Soil Layer (2) practical frictional resistanceWhen solidify Soil layer (3), Soft Soil Layer (2) jointly with the non-settling height in more pile bases side closed on,
--- solidify soil layer (3), Soft Soil Layer (2) and allow non-settling height with the more pile bases side closed on jointly,
--- with solidification soil layer (3) and Soft Soil Layer (2) characteristicWithRelated sedimentation transfer matrix;
--- Hankel transform parameter;
--- the thickness weight and vehicular load of unit length supercrust (6) and base (5),
--- abscissa, the ordinate of the other end road surface starting point coordinate system of house or yard are respectively closed on,
--- solidify the subsidence curve coefficient of soil layer (3) and Soft Soil Layer (2),
--- the width of supercrust (6) and base (5),
--- solidify the sum of soil layer (3), base (5) and thickness of supercrust (6),
--- solidify the frictional resistance stress of the vertical surface of soil layer (3), base (5) and supercrust (6),
--- solidify Young's modulus of elasticity, the Poisson's ratio of soil layer (3),, dimensionless;
--- the Young's modulus of elasticity of Soft Soil Layer (2), Poisson's ratio,, dimensionless.
3. pile foundation side soft soil foundation road according to claim 1 eliminates frictional resistance structure, it is characterised in that the isolation Layer (7) between more pile bases side and the solidification soil layer (3) closed on along the injection heated bitumen of link length direction subsection setup and Asphalt felt, the injection heated bitumen and pile foundation (1) surface smooth contact reduce frictional resistance, re-lay 1~2 layer outside injection heated bitumen Asphalt felt.
4. pile foundation side soft soil foundation road according to claim 1 eliminates frictional resistance structure, it is characterised in that the solidification Soil layer (3) be added on the spot in weak soil curing agent through uniform mixing, be rolled into the closely knit soil body again.
5. pile foundation side soft soil foundation road according to claim 1 eliminates frictional resistance structure, it is characterised in that the geotechnique Grid (4) is to be synthesized by the polypropylene of high molecular polymer, polyvinyl chloride through two-dimensional mesh trellis geotechnique made of thermoplastic or molding Material.
6. pile foundation side soft soil foundation road according to claim 1 eliminates frictional resistance structure, it is characterised in that the base (5) by delaying slag or mud knot crushed stone material is laid with.
7. pile foundation side soft soil foundation road according to claim 1 eliminates frictional resistance structure, it is characterised in that the road surface Layer (6) is paved by asphalt concrete pavement or block stone.
8. a kind of pile foundation side soft soil foundation road according to claim 2 eliminates the construction method of frictional resistance structure, feature It is that the construction method includes the following steps:
Solidify soil layer and Soft Soil Layer Step 1: calculatingWith
The curing agent ratio age compression strength of 7 day age and 28 day for testing different addition contents, in the item for meeting design requirement It is preferable to determine curing agent mix ratios under part;
Test determines the characterisitic parameter for solidifying soil layer (3) and Soft Soil Layer (2)
3. experimental test separation layer (7) and solidifying the frictional resistance stress between soil layer (3), Soft Soil Layer (2), take measures to reduce and rub Hinder stressValue;
4. calculating separately the frictional resistance for solidifying soil layer (3) and Soft Soil Layer (2) by formula one, formula three and formula fourWith, MeetIt is required that;
Step 2: solidification weak soil
1. falling the cultivated plant soil on surface layer clearly;
2. segmentation 10m~20m is gradually excavated to the projected depth for solidifying soil layer (3) with excavator, equal by curing agent mix ratio It is even to broadcast sowing curing agent, and stirred evenly weak soil and curing agent with power shovel;
Step 3: installation separation layer
More pile bases side under house or yard in soft soil foundation and the solidification soil layer (3) stirred evenly that closes on it Between, with excavator along road surface length direction segmentation 10m~20m excavation width 80cm~100cm, depth to solidifying soil layer (3) bottom The groove in face;
2. soil layer power shovel between more pile bases (1) manually makes real, the corner angle concrete of pile foundation exposure is struck with hammer Flat or grinding wheel polishes;
3. heating pitch to 800C~1000C sprays heated bitumen with the segmentation of pitch spray gun from below to up, is adhered to heated bitumen Native surface between pile foundation (1) and pile foundation, thickness 1cm~2cm;
4. after heated bitumen is cooled to room temperature, 1~2 layer of asphalt felt of broken-up laying is native between pile foundation (1) and more pile bases from below to up The surface of pitch is adhered to, 50cm~80cm folding in asphalt felt bottom is that the horizontal weak soil top surface that is layered on is pushed down with solidified earth, by oily hair Felt tenses upwards, and asphalt felt is temporarily fixed on more pile bases (1) by top with cement nail;Along link length direction by several oil Felt spreading, every mutual spreading overlap length 5cm~10cm of width asphalt felt;
After 5. every section of 10m~20m separation layer (7) paves tension, the groove of excavation is full with solidification earthen backfill;
Step 4: rolling solidified earth and maintenance
1. after the completion of solidifying soil layer (3) and separation layer (7) soil layer need to will be solidified with machinery such as light-duty road rollers within the 1d time (3) preliminary consolidation;
2. it is thin to spread 1 layer of plastics on the surface for solidifying soil layer (3) for the volatilization of moisture and the influence of rainwater in solidification process in order to prevent Film maintenance;
3. after 14d, being flattened with light-duty bull-dozer or manually to the surface layer for solidifying soil layer (3);
4. testing inspection solidifies soil layer (3) quality, meet design requirement;
Step 5: being laid with TGXG
TGXG (4) flattening is layered on and solidifies soil layer (3) surface, each reserved pavement edge 80cm~100cm length in both ends, often Mutual connection overlap length 10cm~20cm of width TGXG (4);
Step 6: filling base's pressure
1. filling first layer to delay slag or mud knot rubble 30cm~50cm, it is compacted with medium-sized road roller, compactness meets design requirement;
2. first layer is placed in TGXG (4) inflection of reserved pavement edge to delay slag or mud knot rubble top surface, continue to fill the Two layers of delay slag or mud knot rubble 30cm~50cm are compacted with medium-sized or large roller, until fill, be densified to design thickness, Compactness meets design requirement;
Step 7: surfacing
1. extracting the cement nail being temporarily fixed on more pile bases (1) at the top of asphalt felt;
2. the supercrust (6) of making bituminous concrete paves block-stone pavement.
CN201910043063.8A 2019-01-17 2019-01-17 Pile foundation side soft soil foundation road eliminates frictional resistance structure and construction method Pending CN109853313A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111783275A (en) * 2020-06-02 2020-10-16 中煤科工开采研究院有限公司 Transmission matrix method based additional stress calculation method for laminated medium foundation in subsidence area
CN112176804A (en) * 2020-10-12 2021-01-05 东南大学 Anti-settlement water retention roadbed structure in water-rich soft soil area and design method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111783275A (en) * 2020-06-02 2020-10-16 中煤科工开采研究院有限公司 Transmission matrix method based additional stress calculation method for laminated medium foundation in subsidence area
CN112176804A (en) * 2020-10-12 2021-01-05 东南大学 Anti-settlement water retention roadbed structure in water-rich soft soil area and design method
CN112176804B (en) * 2020-10-12 2022-03-01 东南大学 Anti-settlement water retention roadbed structure in water-rich soft soil area and design method

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