CN108824412A - Based on gabion wall reinforced earth and strong tamping combined soft base processing method - Google Patents

Based on gabion wall reinforced earth and strong tamping combined soft base processing method Download PDF

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Publication number
CN108824412A
CN108824412A CN201810777345.6A CN201810777345A CN108824412A CN 108824412 A CN108824412 A CN 108824412A CN 201810777345 A CN201810777345 A CN 201810777345A CN 108824412 A CN108824412 A CN 108824412A
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gabion
gabion wall
processing method
tamping
soil
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CN108824412B (en
Inventor
马强
杨义聪
牟佳
肖衡林
李丽华
刘永莉
陈智
胡智
刘鸣
刘一鸣
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Hubei University of Technology
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Hubei University of Technology
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00Improving or preserving soil or rock, e.g. preserving permafrost soil
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02Improving by compacting
    • E02D3/046Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02Improving by compacting
    • E02D3/08Improving by compacting by inserting stones or lost bodies, e.g. compaction piles
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12Consolidating by placing solidifying or pore-filling substances in the soil

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

The present invention is a kind of based on gabion wall reinforced earth and strong tamping combined soft base processing method, including:1)Gabion wall guide groove is excavated using excavator;2)It will be put under grid gabion by stone material sold stowing in gabion wall guide groove, and be built into gabion wall;3)With tamping machine compaction in layers by the soil body of the enclosed Soft Soil Area of gabion wall and to designed elevation;4)Leveling compacting treated soil layer surface, is laid with Application of geosynthetics-reinforced bed course;5)In gabion cement injection mortar within the walls;6)After being perfused and completing 6-9 days, consolidation effect is examined using static load test.The present invention provides one kind can improve foundation bearing capacity, reduces settlement of foundation, it is capable of the protuberance deformation in limit levels direction again, be conducive to accelerate to apply the soil body discharging consolidation for ramming place, to improve the gabion wall reinforced earth and strong tamping combined soft base processing method of foundation soil strength.With comprehensive effectivenesses such as carrying, draining, strong rammer, reinforcements, mechanization of building operation degree is high, can be obviously shortened the duration.

Description

Based on gabion wall reinforced earth and strong tamping combined soft base processing method
Technical field
The invention belongs to Soft Soil Subgrade Treatment Techniques fields, are related to a kind of based on gabion wall reinforced earth and strong tamping combined Soft base processing method.
Background technique
With the fast development of Chinese national economy, country continues to increase infrastructure construction, China's highway, Railway construction achieves fast development, and soft soil foundation problem becomes increasingly conspicuous, it has also become influences construction quality, completion time of project and engineering One of key factor of cost.Traditional large-area soft foundation processing method mainly has by increasing compactive effort come to weak soil The heavy-tamping method for carrying out the closely knit processing of deep layer is passed the load on top using stake using the preloading method for the discharging consolidation for accelerating weak soil It is delivered to the pile-making method of supporting course, controls the differential settlement of ground using geosynthetics (TGXG or geotechnical grid) Reinforcement method, and the method that above method is combined.The topography in mountain area cheuch area is low, impeded drainage, by long-term Ponding, foundation soil be often have the characteristics that high-compressibility, low bearing capacity, high liquid limit weak soil, being unevenly distributed of weak soil, soil nature Also complex.Simultaneously as the particularity in cheuch area geographical location, is unfavorable for mechanical disengaging, raw material and electric power Supply, is unsuitable for carrying out large-scale construction operation.Although there are many methods for being used for Soft Ground, carried out to it When improvement, using above-mentioned conventional method because of the reasons such as long in time limit, cost is high, depth is limited for processing, settlement after construction is difficult to control, Effect is not obvious during processing mountain area soft base.
Summary of the invention
In order to solve the above technical problems in background technology, the present invention provides one kind can improve foundation bearing Power reduces uneven settlement of foundation and sedimentation, but be capable of limit levels direction protuberance deformation based on gabion wall reinforced earth with And strong tamping combined soft base processing method.
To achieve the goals above, the present invention adopts the following technical scheme that:
It is a kind of based on gabion wall reinforced earth and strong tamping combined soft base processing method, include the following steps:
1) gabion wall guide groove is excavated using excavator;The gabion wall guide groove is arranged in regular quadrangle;
2) it will be put under the grid gabion by stone material sold stowing in the gabion wall guide groove that step 1) is excavated, and be built into stone Cage wall;
3) with tamping machine compaction in layers by the soil body of the enclosed Soft Soil Area of gabion wall and to designed elevation;
4) leveling compacting treated soil layer surface, is laid with Application of geosynthetics-reinforced bed course, and by geosynthetics Reinforcement cushion is anchored into gabion within the walls;
5) in gabion, cement injection mortar, composition stabilization zone undertake upper load together with foundation soil within the walls.
Preferably, method provided by the present invention further includes after step 5):
6) after being perfused and completing 6-9 days, consolidation effect is examined using static load test, power to be lifted meets design requirement Afterwards, upper part work construction is carried out.
Preferably, the specific implementation of step 3) of the present invention is:
In by the enclosed Soft Soil Area of gabion wall, is rammed with tamping machine and extremely controlled by the soil body of the enclosed Soft Soil Area of gabion wall for the first time It after depth, bankets into tamping pit, is rammed for the second time after tamping pit is filled up;Crater depth to ram for the second time reaches control After depth, then soil is filled up into tamping pit, then carry out third time and ram, until reaching designed elevation in such a way that this is tamped.
Preferably, Application of geosynthetics-reinforced bed course layering of the present invention is spaced, rubble is two-way to be laid on leveling Compacting treated soil layer surface, and anchor into gabion within the walls.
Preferably, the thickness of Application of geosynthetics-reinforced bed course of the present invention takes 400~500mm.
Preferably, the specific implementation anchored in step 4) of the present invention is:In geosynthetics plus At the end anchorage of muscle bed course, by geosynthetics employed in Application of geosynthetics-reinforced bed course with the side of anti-package inflection Formula is anchored, and anchor bar is laid.
Preferably, the partial size of rubble employed in Application of geosynthetics-reinforced bed course of the present invention is 20- 50mm, clay content is not more than 5% in rubble.
Preferably, cement mortar employed in step 5) of the present invention is M30 mortar.
It is an advantage of the invention that:
Include based on gabion wall reinforced earth and strong tamping combined soft base processing method, this method the present invention provides a kind of 1) gabion wall guide groove is excavated using excavator;Gabion wall guide groove is arranged in regular quadrangle;It 2) will be by the grid of stone material sold stowing It is put under gabion in the gabion wall guide groove that step 1) is excavated, and is built into gabion wall;3) with tamping machine compaction in layers by gabion wall institute Enclose the soil body of Soft Soil Area and to designed elevation;4) leveling compacting treated soil layer surface, is laid with Application of geosynthetics-reinforced pad Layer, and Application of geosynthetics-reinforced bed course is anchored into gabion within the walls, and be built into gabion wall;5) in gabion priming petock silt particle within the walls Slurry constitutes stabilization zone, upper load is undertaken together with foundation soil.The present invention includes the gabion wall with biggish rigidity, can be incited somebody to action Top is built, the load of structures is transmitted to supporting course, meanwhile, good row is formed by the discrete material of representative of rubble in gabion Aquaporin can speed up soft base discharging consolidation, effectively improve foundation bearing capacity;Hammer ram freely falling body generates impingement dynamic load pair Soil body acting accelerates the discharge of weak soil pore water, reduces the hole in the soil body, the soil body becomes dense, so that it is strong to improve foundation soil Degree;Geosynthetics is wherein playing the role of similar tension film, tensile strength and non-deformability with higher, raising Its stability, and have the function of uniformly spreading transmitting and control uneven settlement of foundation to load, to control the sedimentation of ground And differential settlement, reduce horizontal direction displacement, increases the ultimate bearing capacity of ground;The porous property of gabion wall and outsourcing Lattice cage cladding, constraint and reinforced action.Generally speaking, the present invention has the comprehensive effectivenesses such as carrying, draining, strong rammer, reinforcement, can Foundation bearing capacity is improved, uneven settlement of foundation and sedimentation are reduced, and is capable of the protuberance deformation in limit levels direction.Meanwhile stone Cage wall and geosynthetics (TGXG or geotechnical grid) reinforcement cushion collectively form fairly perfect drainage system, favorably The soil body discharging consolidation for ramming place is applied in acceleration, effectively improves foundation bearing capacity.And the lattice of well in advance stone material sold stowing Net gabion, mechanization of building operation degree is high, and labor intensity is small, high-efficient, can shorten the construction period.The present invention is with handling mountain area Deep Thick Soft Ground Base, have more technology and economic advantages, sedimentation can be efficiently controlled, it is shown that its good application prospect, there is no at present about Report based on gabion wall reinforced earth and strong tamping combined soft base processing method scheme present invention can be mainly used for controlling sedimentation More demanding large-area soft foundation is made, such as large oil tank ground, highway, railway, airport Soft Ground.
Detailed description of the invention
Fig. 1 is to be adopted based on provided by the present invention based on gabion wall reinforced earth and strong tamping combined soft base processing method The schematic diagram of the section structure of gabion wall;
Fig. 2 is to be adopted based on provided by the present invention based on gabion wall reinforced earth and strong tamping combined soft base processing method The overlooking structure diagram of gabion wall;
Fig. 3 and Fig. 4 is provided by the present invention respectively based on gabion wall reinforced earth and strong tamping combined treatment of soft foundation The case Specific construction figure of method;
In figure
1- gabion wall, 2- tamp weak soil, 3- rubble reinforcement cushion.
Specific embodiment
Technical solution provided by the present invention is described in detail with reference to the accompanying drawing, but the present invention be not limited in Under type:
The present invention is a kind of based on gabion wall reinforced earth and strong tamping combined soft base processing method, is meeting effectively control On the basis of settlement of foundation and differential settlement, and it is capable of the protuberance deformation in limit levels direction.Meanwhile gabion wall and geotechnique close Fairly perfect drainage system is collectively formed at material (TGXG or geotechnical grid) reinforcement cushion, is conducive to accelerate to apply to ram field The soil body discharging consolidation on ground, effectively improves foundation bearing capacity.
It is a kind of based on gabion wall reinforced earth and strong tamping combined soft base processing method referring to Fig. 1 and Fig. 2, mainly answer For to the higher large-area soft foundation of requirement of settlement control, such as large oil tank ground, highway, railway, airport weak soil Basement process, including:
1) gabion wall guide groove is excavated using excavator, regular quadrangle excavates arrangement;
2) it will be put into guide groove under the grid gabion of stone material sold stowing, and be built into gabion wall;
3) with the enclosed Soft Soil Area soil body of tamping machine compaction in layers gabion wall to designed elevation (as needed, such as hole in weak soil Water collects in the case where ramming effect in gabion region, is drained in gabion wall guide groove);
4) leveling compacting treated soil layer surface, is laid with geosynthetics (TGXG or geotechnical grid) reinforcement pad Layer, and anchor into gabion within the walls;
5) the rubble gap cement injection mortar to gabion within the walls constitutes stabilization zone, is used to undertake together with foundation soil Portion's load;
6) after being perfused and completing 6-9 days, consolidation effect is examined using static load test, power to be lifted meets design requirement Afterwards, upper part work construction is carried out.
Guide groove excavation width is excavated, generally excavator bucket width using the excavator of suitable bucket model The modulus of (400mm~800mm) or excavator bucket width.Wherein, channel excavation depth is logical according to ground requirement for bearing capacity Load test is crossed to determine.Spacing between groove is calculated according to the method for calculating area replacement ratio in theory of composite foundation And determination.
The grid gabion of stone material sold stowing is fabricated to design size cabinet using metal wire rod, the closely knit dress in cabinet Plastic of Rockfill, and it is built into gabion wall with the gabion, reinforce the anchoring of connecting portion, anchoring strength is made to reach design requirement.
With the enclosed Soft Soil Area soil body of tamping machine compaction in layers gabion wall to designed elevation, first pass is rammed to controlling depth, and one It behind fixed discharging consolidation interval, bankets into tamping pit, ram for second time after tamping pit is filled up, it is deep that crater depth reaches control Degree behind certain discharging consolidation interval, then fills up soil into tamping pit, then carries out third all over ramming, in such a way that this is tamped until Reach designed elevation.
Leveling compacting treated soil layer surface, before geosynthetics laying, will compacting treated soil layer surface, Careful leveling is carried out, hollow area carries out gravel backfill in advance and makes up a deficiency, and strict control compactness, complies with compactness Requirement, to prevent differential settlement.
Geosynthetics (TGXG or geotechnical grid) reinforced gravel cushion, soil layer surface and gabion after leveling In wall top, two layers of two-way laying of interval rubble of reinforcement material point, it is ensured that laying is smooth, uniform, and reinforced gravel cushion thickness takes 400 ~500mm, to enhance the overall stiffness of bed course.
Geosynthetics is anchored into gabion wall, at end anchorage, by geosynthetics in a manner of anti-package inflection It is anchored, lays anchor bar, its spacing, intensity, anchorage depth should meet design requirement, and check reinforcement at anchoring.
The partial size of rubble is 20-50mm, and stone matter is hard, and weathering is few, and to guarantee drainage effect, clay content is not more than 5%.Water Cement mortar, using M30 mortar, the match ratio of cement and sand is 1:1, ratio of mud 0.4-0.45.
Embodiment 1
Certain section of Hang Rui high speed is located at Hubei Province Xianning mountain area cheuch, the bury area of route crosses large area, roadbed model Weak soil depth in enclosing is 4000mm, and water content is higher, the slope stability of roadbed is poor.It builds highway on it, it is necessary to It is handled first.But, it is contemplated that traffic of mountain area is inconvenient, the unsuitable large-scale construction operation of progress, at traditional ground Reason method not only high construction cost, and construction efficiency is low, it is long in time limit.Therefore, this engineering, which uses, is based on gabion wall reinforced earth And strong tamping combined soft base processing method scheme.Referring to shown in Fig. 3 and Fig. 4, led using excavator Rapid Excavation gabion wall Slot, regular quadrangle excavate arrangement, trench spacing 2000mm, width 600mm, depth 4000mm.Well in advance stone material is close The grid gabion filled in fact, gabion will be put into guide groove having a size of 1400mm × 600mm × 1000mm under gabion, and with the stone Cage is built into gabion wall, reinforces the anchoring of connecting portion, anchoring strength is made to reach design requirement.It is enclosed with tamping machine compacting gabion wall soft Native area's soil body, first pass are rammed to controlling depth, behind certain discharging consolidation interval (1 week), banket into tamping pit, tamping pit is filled out Ram for second time after full, crater depth reaches controlling depth, behind certain discharging consolidation interval (1 week), then into tamping pit Soil is filled up, then carries out third all over ramming, until reaching designed elevation in such a way that this is tamped.It will compacting treated soil layer table Face carries out careful leveling, and hollow area carries out gravel backfill in advance and makes up a deficiency, soil layer surface and gabion wall top after leveling On, two-way interval rubble is laid with reinforcement material, is laid with 200mm rubble, one layer of TGXG, 200mm rubble, one layer of geotechnological lattice Grid are formed with a thickness of 500mm reinforced gravel cushion, and end point is anchored into gabion within the walls.It is perfused to the rubble gap of gabion within the walls Cement mortar constitutes stabilization zone, is used to undertake upper load together with foundation soil.After being perfused and completing 7 days, tried using dead load Inspection consolidation effect is tested, bearing capacity meets design requirement, then carries out the construction of top structures and embankment.By to the stone The application of cage wall earth structure and strong tamping combined soft foundation processing technology in the gulch weak subsoil of mountain area carries out analysis and practice test, Summarize the new technology formd suitable for the processing of cheuch soft layer.Compared with traditional soft soil foundation reinforcing method, knot of the present invention Structure and method can improve foundation bearing capacity, reduce uneven settlement of foundation and sedimentation, and be capable of the protuberance in limit levels direction Deformation.Meanwhile gabion wall and geosynthetics (TGXG or geotechnical grid) reinforcement cushion collectively form it is fairly perfect Drainage system is conducive to accelerate to apply the weak soil discharging consolidation for ramming place, effectively improves foundation bearing capacity.In construction, in gabion Stone material using gathering materials on the spot, the grid gabion of well in advance stone material sold stowing, under be put into the groove of digging machine excavation, construction Mechanization degree is high, and labor intensity is small, avoids to change on a large scale and fill out or pile body construction, had not only reduced cost but also facilitated construction, favorably In improving construction efficiency, shorten the construction period.

Claims (8)

1. a kind of based on gabion wall reinforced earth and strong tamping combined soft base processing method, it is characterised in that:It is described to be based on gabion Wall reinforced earth and strong tamping combined soft base processing method include the following steps:
1)Gabion wall guide groove is excavated using excavator;The gabion wall guide groove is arranged in regular quadrangle;
2)Step 1 will be put by the grid gabion of stone material sold stowing)In the gabion wall guide groove excavated, and it is piled into gabion Wall;
3)With tamping machine compaction in layers by the soil body of the enclosed Soft Soil Area of gabion wall and to designed elevation;
4)Leveling compacting treated soil layer surface, is laid with Application of geosynthetics-reinforced bed course, and by Application of geosynthetics-reinforced Bed course is anchored into gabion within the walls;
5)In gabion, cement injection mortar, composition stabilization zone undertake upper load together with foundation soil within the walls.
2. according to claim 1 existed based on gabion wall reinforced earth and strong tamping combined soft base processing method, feature In:The method is in step 5)Further include later:
6)After being perfused and completing 6-9 days, consolidation effect is examined using static load test, after power to be lifted meets design requirement, into The construction of row upper part work.
3. according to claim 1 or 2 based on gabion wall reinforced earth and strong tamping combined soft base processing method, feature It is:The step 3)Specific implementation be:In the enclosed Soft Soil Area of gabion wall, rammed for the first time by gabion wall institute with tamping machine It after the soil body to controlling depth for enclosing Soft Soil Area, bankets into tamping pit, is rammed for the second time after tamping pit is filled up;It is rammed to second After the crater depth hit reaches controlling depth, then soil is filled up into tamping pit, then carry out third time and ram, it is straight in such a way that this is tamped To reaching designed elevation.
4. according to claim 3 existed based on gabion wall reinforced earth and strong tamping combined soft base processing method, feature In:Application of geosynthetics-reinforced bed course layering interval rubble is two-way to be laid on leveling compacting treated soil layer surface, and It anchors into gabion within the walls.
5. according to claim 4 existed based on gabion wall reinforced earth and strong tamping combined soft base processing method, feature In:The thickness of the Application of geosynthetics-reinforced bed course takes 400~500mm.
6. according to claim 5 existed based on gabion wall reinforced earth and strong tamping combined soft base processing method, feature In:The step 4)The specific implementation of middle anchoring is:It, will be geotechnological at the end anchorage of Application of geosynthetics-reinforced bed course Geosynthetics employed in synthetic material reinforcement cushion is anchored in a manner of anti-package inflection, lays anchor bar.
7. according to claim 6 existed based on gabion wall reinforced earth and strong tamping combined soft base processing method, feature In:The partial size of rubble employed in the Application of geosynthetics-reinforced bed course is 20-50mm, and clay content is not more than in rubble 5%。
8. according to claim 7 existed based on gabion wall reinforced earth and strong tamping combined soft base processing method, feature In:The step 5)Employed in cement mortar be M30 mortar.
CN201810777345.6A 2018-07-16 2018-07-16 Soft foundation treatment method based on gabion wall reinforced soil and dynamic compaction combination Active CN108824412B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109610436A (en) * 2019-02-19 2019-04-12 吴慧明 A kind of sectional type blast-filled ground processing method
CN110130305A (en) * 2019-04-12 2019-08-16 交通运输部天津水运工程科学研究所 A kind of grid type soft-soil foundation treatment method and foundation structure
CN114197434A (en) * 2021-12-13 2022-03-18 河南锐意工程检测有限公司 Building foundation treatment method for area with liquefied soil bearing layer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105220674A (en) * 2014-05-29 2016-01-06 中交四航工程研究院有限公司 Deep soft foundation reinforcing and processing method
CN106759397A (en) * 2017-01-06 2017-05-31 苏州工业园区园林绿化工程有限公司 Ecological lattice guest method to set up
CN106988338A (en) * 2017-03-31 2017-07-28 中国冶集团有限公司 Gabion box retaining wall and its construction method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105220674A (en) * 2014-05-29 2016-01-06 中交四航工程研究院有限公司 Deep soft foundation reinforcing and processing method
CN106759397A (en) * 2017-01-06 2017-05-31 苏州工业园区园林绿化工程有限公司 Ecological lattice guest method to set up
CN106988338A (en) * 2017-03-31 2017-07-28 中国冶集团有限公司 Gabion box retaining wall and its construction method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109610436A (en) * 2019-02-19 2019-04-12 吴慧明 A kind of sectional type blast-filled ground processing method
CN110130305A (en) * 2019-04-12 2019-08-16 交通运输部天津水运工程科学研究所 A kind of grid type soft-soil foundation treatment method and foundation structure
CN114197434A (en) * 2021-12-13 2022-03-18 河南锐意工程检测有限公司 Building foundation treatment method for area with liquefied soil bearing layer

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