CN206625096U - A kind of reinforced rubble frame structure subgrade strengthening system - Google Patents

A kind of reinforced rubble frame structure subgrade strengthening system Download PDF

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CN206625096U
CN206625096U CN201720076512.5U CN201720076512U CN206625096U CN 206625096 U CN206625096 U CN 206625096U CN 201720076512 U CN201720076512 U CN 201720076512U CN 206625096 U CN206625096 U CN 206625096U
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reinforced
gravel
crushed stone
rubble
layer
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郭震山
张军
赵建斌
宿钟鸣
朱晓斌
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

本实用新型属于路基加固工程领域,涉及一种加筋碎石框架结构路基加固体系,包括加筋碎石垫层、路堤填土、加筋碎石桩、土工格室加筋碎石层以及面层;加筋碎石桩纵向设置在土工格室加筋碎石层以及加筋碎石垫层之间并分别与土工格室加筋碎石层以及加筋碎石垫层相连;土工格室加筋碎石层与加筋碎石桩和加筋碎石垫层之前填充有路堤填土;面层铺设在土工格室加筋碎石层的上表面;加筋碎石垫层、加筋碎石桩以及土工格室加筋碎石层通过预埋注浆管进行联合注浆形成整体的加筋碎石框架结构加固体系。本实用新型提供一种结构力学性能合理、整体性和防渗性好以及承载力高的加筋碎石框架结构路基加固体系。

The utility model belongs to the field of roadbed reinforcement engineering, and relates to a reinforced gravel frame structure roadbed reinforcement system, comprising a reinforced gravel cushion, embankment filling, reinforced gravel piles, a geocell reinforced gravel layer and a surface layer; the reinforced crushed stone pile is arranged longitudinally between the reinforced crushed stone layer of the geocell and the reinforced crushed stone cushion and is respectively connected with the reinforced crushed stone layer of the geocell and the reinforced crushed stone cushion; the geocell The reinforced crushed stone layer, the reinforced crushed stone pile and the reinforced crushed stone cushion are filled with embankment fill; the surface layer is laid on the upper surface of the reinforced crushed stone layer in the geocell; the reinforced crushed stone cushion, reinforced The gravel pile and the reinforced gravel layer of the geocell are jointly grouted through the pre-embedded grouting pipe to form an overall reinforced gravel frame structure reinforcement system. The utility model provides a reinforced crushed stone frame structure subgrade reinforcement system with reasonable structural mechanical properties, good integrity and anti-seepage performance and high bearing capacity.

Description

一种加筋碎石框架结构路基加固体系A Reinforced Gravel Frame Structure Roadbed Reinforcement System

技术领域technical field

本实用新型属于路基加固工程领域,涉及一种路基加固体系,尤其涉及一种加筋碎石框架结构路基加固体系。The utility model belongs to the field of roadbed reinforcement engineering and relates to a roadbed reinforcement system, in particular to a roadbed reinforcement system with a reinforced gravel frame structure.

背景技术Background technique

近年来,随着我国经济的飞速发展以及国家对基础设计建设的重视和投入,公路建设如火如荼,我国的公路运输能力将得到进一步提升。道路交通体系的完善促进各个地区物质资源的相互流动,将极大地推动国民经济的发展。In recent years, with the rapid development of my country's economy and the country's emphasis on and investment in infrastructure design and construction, road construction is in full swing, and my country's road transportation capacity will be further improved. The improvement of the road traffic system will promote the mutual flow of material resources in various regions, which will greatly promote the development of the national economy.

然而,通过对大量在役道路常见病害的统计表明,在道路运营阶段,路基在车辆荷载的长期振动和挤压作用下,路基极易出现不均匀沉降,导致路面开裂等病害,尤其是软土等特殊土地区,道路病害现象更为突出。路面裂缝的出现将数量级的提高路面的渗透水能力,在外界降雨入渗条件下,雨水通过裂缝渗入路基土体中,进一步导致路基填土软化,路面沉陷加剧,严重影响路面正常通行,甚至导致交通事故发生。However, statistics on a large number of common diseases of roads in service show that during the road operation stage, under the long-term vibration and extrusion of vehicle loads, the roadbed is prone to uneven settlement, leading to road surface cracking and other diseases, especially soft soil Road diseases are more prominent in some special soil areas. The appearance of road surface cracks will increase the water seepage capacity of the road surface by orders of magnitude. Under the condition of external rainfall infiltration, rainwater will seep into the roadbed soil through the cracks, which will further lead to the softening of the roadbed filling and the aggravation of road surface subsidence, seriously affecting the normal traffic of the road surface, and even causing A traffic accident happens.

实用新型内容Utility model content

为解决上述问题,本实用新型提供一种结构力学性能合理、整体性和防渗性好以及承载力高的加筋碎石框架结构路基加固体系。In order to solve the above problems, the utility model provides a reinforced crushed stone frame structure subgrade reinforcement system with reasonable structural mechanical properties, good integrity and anti-seepage performance, and high bearing capacity.

为实现上述目的,本实用新型采用如下技术方案:In order to achieve the above object, the utility model adopts the following technical solutions:

一种加筋碎石框架结构路基加固体系,其特征在于:所述加筋碎石框架结构路基加固体系包括加筋碎石垫层、路堤填土、加筋碎石桩、土工格室加筋碎石层以及面层;所述土工格室加筋碎石层与加筋碎石垫层相互平行;所述加筋碎石桩纵向设置在土工格室加筋碎石层以及加筋碎石垫层之间并分别与土工格室加筋碎石层以及加筋碎石垫层相连;所述土工格室加筋碎石层与加筋碎石桩和加筋碎石垫层之间填充有路堤填土;所述面层铺设在土工格室加筋碎石层的上表面;所述加筋碎石垫层、加筋碎石桩以及土工格室加筋碎石层通过预埋注浆管进行联合注浆形成整体的加筋碎石框架结构加固体系。A reinforced crushed stone frame structure subgrade reinforcement system, characterized in that: the reinforced crushed stone frame structure subgrade reinforcement system includes reinforced crushed stone cushion, embankment fill, reinforced crushed stone pile, geocell reinforcement crushed stone layer and surface layer; the geocell reinforced crushed stone layer and the reinforced crushed stone cushion are parallel to each other; the reinforced crushed stone pile is longitudinally arranged on the geocell reinforced crushed stone layer and the reinforced crushed stone The cushion layers are respectively connected with the geocell reinforced crushed stone layer and the reinforced crushed stone cushion; the geocell reinforced crushed stone layer is filled with the reinforced crushed stone pile and the reinforced crushed stone cushion There is embankment filling; the surface layer is laid on the upper surface of the geocell reinforced crushed stone layer; the reinforced crushed stone cushion, the reinforced crushed stone pile and the geocell reinforced crushed stone layer are pre-embedded The grout pipes are combined with grouting to form an overall reinforced gravel frame structure reinforcement system.

作为优选,本实用新型所采用的加筋碎石垫层包括土工格栅或土工格室以及填充在土工格栅或土工格室中的碎石;所述土工格栅或土工格室是一层或多层;所述土工格栅或土工格室是多层时,多层土工格栅或土工格室相互并行;所述碎石的最大粒径不大于100mm;所述碎石中的含泥量不大于5%;所述加筋碎石垫层的厚度范围是0.3m~1.0m。As a preference, the reinforced gravel cushion used in the utility model includes a geogrid or a geocell and crushed stones filled in the geogrid or the geocell; the geogrid or the geocell is a layer or multiple layers; when the geogrid or geocell is multi-layer, the multi-layer geogrid or geocell are parallel to each other; the maximum particle size of the crushed stone is not more than 100mm; the mud contained in the crushed stone The amount is not more than 5%; the thickness range of the reinforced gravel cushion is 0.3m-1.0m.

作为优选,本实用新型所采用的土工格栅的抗拉强度不小于100kN/m;所述土工格栅的断裂延伸率不大于3%;所述土工格栅为多层时,相邻两层土工格栅之间的间距是0.2m~0.4m。As a preference, the tensile strength of the geogrid used in the utility model is not less than 100kN/m; the fracture elongation of the geogrid is not more than 3%; when the geogrid is multi-layered, two adjacent layers The spacing between geogrids is 0.2m to 0.4m.

作为优选,本实用新型所采用的加筋碎石桩包括土工格栅套筒以及填充在土工格栅套筒内部的套筒内碎石;所述加筋碎石桩是多根;多根加筋碎石桩成梅花形排列,相邻两根加筋碎石桩的桩间距是3m~5m;所述加筋碎石桩的桩径是0.5m~1.0m;所述土工格栅套筒内碎石的最大粒径不大于80mm;所述套筒内碎石的含泥量不大于5%;所述土工格栅套筒是由抗拉强度不低于30kN/m的土工格栅制成。As a preference, the reinforced gravel pile used in the utility model includes a geogrid sleeve and gravel filled in the sleeve inside the geogrid sleeve; the reinforced gravel pile is multiple; The reinforced gravel piles are arranged in a plum blossom shape, and the distance between two adjacent reinforced gravel piles is 3m to 5m; the pile diameter of the reinforced gravel piles is 0.5m to 1.0m; the geogrid sleeve The maximum particle size of the gravel in the sleeve is not more than 80mm; the mud content of the gravel in the sleeve is not more than 5%; the geogrid sleeve is made of a geogrid with a tensile strength of not less than 30kN/m become.

作为优选,本实用新型所采用的土工格室加筋碎石层包括土工格室以及填充在土工格室中的碎石;所述土工格室的抗拉强度不小于150kN/m;所述土工格室的断裂延伸率不大于10%;所述土工格室中的碎石的最大粒径不大于100mm;所述土工格室中的碎石的含泥量不大于5%;所述土工格室加筋碎石层的厚度是20cm~50cm。As a preference, the geocell reinforced gravel layer used in the utility model includes a geocell and gravel filled in the geocell; the tensile strength of the geocell is not less than 150kN/m; the geocell The elongation at break of the cell is not more than 10%; the maximum particle size of the gravel in the geocell is not more than 100mm; the mud content of the gravel in the geocell is not more than 5%; the geocell The thickness of the chamber-reinforced gravel layer is 20cm-50cm.

本实用新型的优点:Advantage of the utility model:

本实用新型提供了一种加筋碎石框架结构路基加固体系,该体系包括加筋碎石垫层、加筋碎石桩、土工格室加筋碎石层以及面层。其中,加筋碎石垫层、加筋碎石桩、土工格室加筋碎石层以及面层自下而上依次布设;加筋碎石垫层、加筋碎石桩和土工格室加筋碎石层通过预埋注浆管进行联合注浆,形成一个整体的加筋碎石框架结构加固体系。本实用新型对路基承载力低且易在车辆荷载作用下产生不均匀沉降,导致路面开裂等一系列病害问题,显著提高了路基的整体性稳定性,增强了路基的承载特性以及抗渗性能。该路基加固体系有效地解决了路基运营过程中在车辆荷载长期作用下不均匀沉降和路面开裂严重的问题,同时具有较好的经济型和可实施性。The utility model provides a reinforced crushed stone frame structure subgrade reinforcement system, which comprises a reinforced crushed stone cushion layer, a reinforced crushed stone pile, a geocell reinforced crushed stone layer and a surface layer. Among them, the reinforced crushed stone cushion, reinforced crushed stone pile, geocell reinforced crushed stone layer and surface layer are arranged sequentially from bottom to top; reinforced crushed stone cushion, reinforced crushed stone pile and geocell The reinforced gravel layer is jointly grouted through pre-embedded grouting pipes to form an integral reinforced gravel frame structure reinforcement system. The utility model solves a series of problems such as low bearing capacity of the roadbed and is easy to produce uneven settlement under the action of vehicle load, resulting in cracking of the road surface, etc., significantly improves the overall stability of the roadbed, and enhances the bearing characteristics and anti-seepage performance of the roadbed. The subgrade reinforcement system effectively solves the problems of uneven settlement and serious cracking of the road surface under the long-term action of vehicle loads during the operation of the subgrade, and is economical and practical.

附图说明Description of drawings

图1是本实用新型所提供的路基加固体系的剖视结构示意图;Fig. 1 is the sectional structure schematic diagram of the subgrade reinforcement system provided by the utility model;

图2是本实用新型所采用的加筋碎石垫层的剖视结构示意图;Fig. 2 is the sectional structure schematic diagram of the reinforced gravel cushion layer that the utility model adopts;

图3是本实用新型所采用的加筋碎石桩的平面结构示意图;Fig. 3 is the plane structure schematic diagram of the reinforced gravel pile that the utility model adopts;

图4是本实用新型所采用的土工格室加筋碎石层的剖视结构示意图;Fig. 4 is the sectional structural representation of the geocell reinforced gravel layer adopted by the utility model;

图5是本实用新型所采用的加筋碎石垫层、加筋碎石桩和土工格室加筋碎石层联合注浆示意图;Fig. 5 is the combined grouting diagram of the reinforced gravel cushion, reinforced gravel pile and geocell reinforced gravel layer adopted by the utility model;

其中:in:

1-加筋碎石垫层;2-路堤填土;3-加筋碎石桩;4-土工格室加筋碎石层;5-面层;6-碎石;7-土工格栅;8-土工格栅套筒;9-土工格室;10-注浆管;11-注浆泵。1-reinforced gravel cushion; 2-embankment fill; 3-reinforced gravel pile; 4-reinforced gravel layer in geocell; 5-surface layer; 6-crushed stone; 7-geogrid; 8-geogrid sleeve; 9-geocell; 10-grouting pipe; 11-grouting pump.

具体实施方式detailed description

参见图1,本实用新型提供了一种加筋碎石框架结构路基加固体系,包括加筋碎石垫层1、路堤填土2、加筋碎石桩3、土工格室加筋碎石层4以及面层5;土工格室加筋碎石层4与加筋碎石垫层1相互平行;加筋碎石桩3纵向设置在土工格室加筋碎石层4以及加筋碎石垫层1之间并分别与土工格室加筋碎石层4以及加筋碎石垫层1相连;土工格室加筋碎石层4与加筋碎石桩3和加筋碎石垫层1之间填充有路堤填土2;面层5铺设在土工格室加筋碎石层4的上表面;加筋碎石垫层1、加筋碎石桩3以及土工格室加筋碎石层4通过预埋注浆管进行联合注浆形成整体的加筋碎石框架结构加固体系。Referring to Fig. 1, the utility model provides a reinforced gravel frame structure embankment reinforcement system, including reinforced gravel cushion 1, embankment fill 2, reinforced gravel pile 3, geocell reinforced gravel layer 4 and the surface layer 5; the geocell reinforced gravel layer 4 and the reinforced gravel cushion 1 are parallel to each other; the reinforced gravel pile 3 is longitudinally arranged on the geocell reinforced gravel layer 4 and the reinforced gravel cushion The layer 1 is connected with the geocell reinforced crushed stone layer 4 and the reinforced crushed stone cushion layer 1 respectively; the geocell reinforced crushed stone layer 4 is connected with the reinforced crushed stone pile 3 and the reinforced crushed stone cushion layer 1 Filled with embankment fill soil 2; surface layer 5 is laid on the upper surface of geocell reinforced crushed stone layer 4; reinforced crushed stone cushion 1, reinforced crushed stone pile 3 and geocell reinforced crushed stone layer 4 Combined grouting through pre-embedded grouting pipes to form an overall reinforced gravel frame structure reinforcement system.

其中:加筋碎石垫层1包括土工格栅7或土工格室以及填充在土工格栅7或土工格室中的碎石6,其结构示意图参见图2;土工格栅7或土工格室是一层或多层;土工格栅7或土工格室是多层时,多层土工格栅7或土工格室相互并行;碎石6的最大粒径不大于100mm;碎石6中的含泥量不大于5%;加筋碎石垫层1的厚度范围是0.3m~1.0m。Among them: the reinforced crushed stone cushion 1 includes a geogrid 7 or a geocell and gravel 6 filled in the geogrid 7 or the geocell, and its structural diagram is shown in Fig. 2; the geogrid 7 or the geocell One or more layers; when the geogrid 7 or the geocell is multi-layered, the multi-layer geogrid 7 or the geocell are parallel to each other; the maximum particle size of the crushed stone 6 is not greater than 100mm; the content of the crushed stone 6 The amount of mud is not more than 5%; the thickness range of the reinforced gravel cushion layer 1 is 0.3m-1.0m.

土工格栅7的抗拉强度不小于100kN/m;土工格栅7的断裂延伸率不大于3%;土工格栅7为多层时,相邻两层土工格栅7之间的间距是0.2m~0.4m。The tensile strength of the geogrid 7 is not less than 100kN/m; the elongation at break of the geogrid 7 is not more than 3%; when the geogrid 7 is multi-layered, the distance between two adjacent geogrids 7 is 0.2 m ~ 0.4m.

参见图3,加筋碎石桩3包括土工格栅套筒8以及填充在土工格栅套筒8内部的套筒内碎石;加筋碎石桩3是多根;多根加筋碎石桩3成梅花形排列,相邻两根加筋碎石桩3的桩间距是3m~5m;加筋碎石桩3的桩径是0.5m~1.0m;土工格栅套筒8内碎石的最大粒径不大于80mm;套筒内碎石的含泥量不大于5%;土工格栅套筒8是由抗拉强度不低于30kN/m的土工格栅制成;在土工格栅制作土工格栅套筒8时,若土工格栅的长度不够,可采用相邻两个土工格栅搭接的方式进行,搭接时的搭接长度不小于30cm。Referring to Fig. 3, the reinforced gravel pile 3 includes a geogrid sleeve 8 and crushed stones filled in the sleeve inside the geogrid sleeve 8; the reinforced gravel pile 3 is multiple; the multiple reinforced gravel The piles 3 are arranged in a quincunx shape, and the distance between two adjacent reinforced gravel piles 3 is 3m to 5m; the pile diameter of the reinforced gravel piles 3 is 0.5m to 1.0m; The maximum particle size of the soil is not more than 80mm; the mud content of the gravel in the sleeve is not more than 5%; the geogrid sleeve 8 is made of a geogrid with a tensile strength of not less than 30kN/m; the geogrid When making the geogrid sleeve 8, if the length of the geogrid is not enough, two adjacent geogrids can be overlapped, and the length of the overlap is not less than 30cm.

参见图4,土工格室加筋碎石层4包括土工格室9以及填充在土工格室9中的碎石;土工格室9的抗拉强度不小于150kN/m;土工格室9的断裂延伸率不大于10%;土工格室9中的碎石的最大粒径不大于100mm;土工格室9中的碎石的含泥量不大于5%;土工格室加筋碎石层4的厚度是20cm~50cm。Referring to Fig. 4, the geocell reinforced gravel layer 4 includes a geocell 9 and gravel filled in the geocell 9; the tensile strength of the geocell 9 is not less than 150kN/m; the fracture of the geocell 9 The elongation rate is not more than 10%; the maximum particle size of the gravel in the geocell 9 is not more than 100mm; the mud content of the gravel in the geocell 9 is not more than 5%; the reinforced gravel layer 4 of the geocell The thickness is 20cm~50cm.

联合注浆时采用的注浆液是水泥浆;水泥浆中掺入水玻璃以及UEA膨胀剂;水玻璃与水泥浆的重量比是1%~3%;UEA膨胀剂与水泥浆的重量比是8%~10%;水泥浆中的水灰比范围是0.8:1~1:1;联合注浆时的注浆压力为0.1~0.3Mpa。The grouting fluid used in joint grouting is cement slurry; water glass and UEA expansion agent are mixed into the cement slurry; the weight ratio of water glass to cement slurry is 1% to 3%; the weight ratio of UEA expansion agent to cement slurry is 8% to 10%; the water-cement ratio in the cement slurry ranges from 0.8:1 to 1:1; the grouting pressure during combined grouting is 0.1 to 0.3Mpa.

基于本实用新型所提供的加筋碎石框架结构路基加固体系进行加固时,其加固过程是:When reinforcing the subgrade reinforcement system based on the reinforced gravel frame structure provided by the utility model, the reinforcement process is as follows:

1)采用压路机将加固段地基的基底碾压密实,满足设计压实度要求;1) Use a road roller to compact the base of the foundation in the reinforced section to meet the design compaction requirements;

2)填筑第一层厚度为20cm的碎石六层,并采用光轮压路机静压一遍,碾压应满足地基系数K30不小于140MPa/m,静压完成后铺设第一层土工格栅7;2) Fill the first layer of six layers of gravel with a thickness of 20cm, and use a smooth roller to statically compact it once. The compaction should meet the foundation coefficient K30 of not less than 140MPa/m. After the static pressure is completed, lay the first layer of geogrid 7 ;

3)重复步骤2),在第一层土工格栅7的上表面依次完成后续两层碎石6和两层土工格栅7的铺设,相邻两层土工格栅7采取纵横交错铺设,幅与幅之间对齐,搭接长度不小于30cm;3) Step 2) is repeated, and the subsequent laying of two layers of gravel 6 and two layers of geogrid 7 is completed on the upper surface of the first layer of geogrid 7, and the adjacent two layers of geogrid 7 are laid in a criss-cross pattern, Align with the width, the overlap length is not less than 30cm;

4)路堤填土2进行分层填筑,逐层压实,每层松铺厚度不超过30cm,填土含水量控制在含水量上下2%以内,各层压实度应满足设计和规范要求;4) Embankment fill 2 shall be filled in layers and compacted layer by layer. The thickness of each layer shall not exceed 30cm. The water content of the fill soil shall be controlled within 2% of the water content. The degree of compaction of each layer shall meet the design and specification requirements. ;

5)待路堤填土2填筑完成后,采用振冲器在设计桩位处钻孔,钻孔至加筋碎石垫层1的上表面并进行清孔;5) After the embankment filling 2 is completed, use a vibrometer to drill holes at the design pile positions, drill holes to the upper surface of the reinforced gravel cushion 1 and clean the holes;

6)沿孔壁内侧安放土工格栅套筒8,预埋注浆管10,注浆管10插入加筋碎石垫层1中5~10cm;6) Place the geogrid sleeve 8 along the inner side of the hole wall, pre-embed the grouting pipe 10, and insert the grouting pipe 10 into the reinforced crushed stone cushion 1 by 5-10 cm;

7)向孔内分批填筑套筒内碎石并振捣直至孔内碎石填筑完成;7) Fill the gravel in the sleeve in batches into the hole and vibrate until the gravel filling in the hole is completed;

8)紧贴路路堤填土2的上表面铺设土工格室9,待土工格室9铺设完成后及时填筑土工格室9中的碎石,形成土工格室加筋碎石层4;8) Lay geocell 9 close to the upper surface of road embankment fill 2, fill in the gravel in geocell 9 in time after geocell 9 is laid, and form geocell reinforced gravel layer 4;

9)待土工格室加筋碎石层4施工完毕后,通过注浆泵11以及已预埋的注浆管10,自下而上进行注浆,注浆过程中,根据注浆压力提升注浆管10,依次完成加筋碎石垫层1、加筋碎石桩3以及土工格室加筋碎石层4的注浆工作;当注浆压力达到设计注浆压力后,稳压3~5分钟;当发现浆液反至地表时,降低注浆速度,防止注浆压力过大导致地表出现冒浆;必要时采用间歇注浆法,进行二次注浆或多次注浆,间歇注浆时间为0.5~1.5h,直至浆液填充满土工格室加筋碎石层4,结束注浆工作;9) After the construction of the geocell reinforced gravel layer 4 is completed, the grouting pump 11 and the pre-buried grouting pipe 10 are used to grout from bottom to top. The grout pipe 10 completes the grouting of the reinforced gravel cushion 1, the reinforced gravel pile 3 and the geocell reinforced gravel layer 4 in sequence; 5 minutes; when the grout is found to be reversed to the surface, reduce the grouting speed to prevent grouting from the surface due to excessive grouting pressure; if necessary, use the intermittent grouting method for secondary grouting or multiple grouting, intermittent grouting The time is 0.5~1.5h, until the grout fills the geocell reinforced gravel layer 4, and the grouting work is finished;

10)待注浆液凝固并达到预期强度后,铺设沥青或混凝土所形成的面层5。10) After the grouting fluid solidifies and reaches the expected strength, lay the surface layer 5 formed by asphalt or concrete.

下面结合具体的实施例对本实用新型所述的加筋碎石框架结构路基加固体系做进一步说明。The following is a further description of the reinforced gravel frame structure subgrade reinforcement system of the present invention in conjunction with specific embodiments.

实施例1Example 1

参见图1,一种加筋碎石框架结构路基加固体系,该加固体系包括加筋碎石垫层1、路堤填土2、加筋碎石桩3、土工格室加筋碎石层4以及面层5。Referring to Fig. 1, a reinforced crushed stone frame structure subgrade reinforcement system, the reinforcement system includes a reinforced crushed stone cushion 1, embankment fill 2, reinforced crushed stone pile 3, geocell reinforced crushed stone layer 4 and Topping 5.

其中,路堤填土高度4m,路面宽度16m,路基边坡坡比1:1.5。Among them, the embankment filling height is 4m, the road width is 16m, and the slope ratio of the subgrade is 1:1.5.

加筋碎石垫层1的厚度为60cm,采用分层填筑法施工,每层填筑厚度20cm;加筋材料选用土工格栅7,土工格栅7满足高强度。低应变的要求,在1%延伸率时的抗拉强度不小于300kN/m。每填筑一层碎石6铺设一层土工格栅7,共铺设三层。加筋碎石垫层1和土工格室加筋碎石层4所用碎石的最大粒径不大于100mm,加筋碎石桩3所用碎石最大粒径不大于60cm,含泥量均不大于5%。The thickness of the reinforced crushed stone cushion 1 is 60cm, and it is constructed by layered filling method, and the thickness of each layer is 20cm; the reinforcement material is geogrid 7, which meets high strength. Low strain requirements, the tensile strength at 1% elongation is not less than 300kN/m. A layer of geogrid 7 is laid for every layer of crushed stone 6, and three layers are laid in total. The maximum particle size of the crushed stone used in the reinforced crushed stone cushion layer 1 and the reinforced crushed stone layer 4 of the geocell is not greater than 100mm, the maximum particle diameter of the crushed stone used in the reinforced crushed stone pile 3 is not greater than 60cm, and the mud content is not greater than 5%.

加筋碎石桩3的直径为0.6m,横向间距为4m;土工格栅套筒8的抗拉强度为50kN/m,幅宽4m。The diameter of the reinforced gravel pile 3 is 0.6m, and the transverse spacing is 4m; the tensile strength of the geogrid sleeve 8 is 50kN/m, and the width is 4m.

土工格室加筋碎石层4的厚度为30cm,土工格室9抗拉强度为300kN/m,最大延伸率为5%。The thickness of the geocell reinforced gravel layer 4 is 30 cm, the tensile strength of the geocell 9 is 300 kN/m, and the maximum elongation is 5%.

注浆液为32.5级矿渣水泥浆,并掺入3%的水玻璃,掺入9%的UEA膨胀剂,水灰比为1:1,注浆压力为0.3Mpa。The grouting fluid is 32.5 grade slag cement slurry, mixed with 3% water glass and 9% UEA expansion agent, the water-cement ratio is 1:1, and the grouting pressure is 0.3Mpa.

本实用新型提供的加筋碎石框架结构路基加固体系,其施工步骤如下:The construction steps of the reinforced gravel frame structure embankment reinforcement system provided by the utility model are as follows:

A、采用压路机将加固段地基的基底碾压密实,满足设计压实度要求。A. Use a road roller to compact the base of the foundation in the reinforced section to meet the design compaction requirements.

B、填筑第一层厚度为20cm的碎石六层,并采用光轮压路机静压一遍,碾压应满足地基系数K30不小于140MPa/m,静压完成后铺设第一层土工格栅7。B. Fill the first layer of six layers of gravel with a thickness of 20cm, and use a smooth roller to statically compact it once. The compaction should meet the foundation coefficient K30 and not less than 140MPa/m. After the static pressure is completed, lay the first layer of geogrid 7 .

C、重复步骤B完成后续二层碎石6和土工格栅7的铺设,上下层土工格栅采取纵横交错铺设,幅与幅之间要对齐,搭接长度不小于30cm。C. Repeat step B to complete the subsequent laying of the second layer of crushed stone 6 and geogrid 7. The upper and lower layers of geogrid are laid in a criss-cross pattern, and the widths must be aligned. The overlapping length should not be less than 30cm.

D、路堤填土2进行分层填筑,逐层压实,每层松铺厚度不超过30cm,填土含水量控制在最佳含水量上下2%以内,各层压实度应满足设计和规范要求。D. Embankment filling 2 shall be filled in layers and compacted layer by layer. The thickness of each layer of loose paving shall not exceed 30cm. The water content of the filling soil shall be controlled within 2% of the optimum water content. requirements.

E、路堤填土2填筑完成后,采用振冲器在设计桩位处钻孔,钻孔至加筋碎石垫层1上表面并进行清孔。E. After the filling of embankment 2 is completed, use a vibrator to drill holes at the designed pile positions, drill holes to the upper surface of the reinforced gravel cushion 1 and clean the holes.

F、沿孔壁内侧安放土工格栅套筒8,预埋注浆管10,其中注浆管插入加筋碎石垫层1中5cm左右。F. Place the geogrid sleeve 8 along the inner side of the hole wall, and pre-embed the grouting pipe 10, wherein the grouting pipe is inserted into the reinforced crushed stone cushion 1 by about 5cm.

G、向孔内分批填筑碎石6并振捣直至孔内碎石填筑完成。G. Fill the hole with gravel in batches 6 and vibrate until the gravel filling in the hole is completed.

H、紧贴路堤填土2铺设土工格室9,土工格室9铺设完成后及时填筑碎石6。H. Lay the geocell 9 close to the embankment fill 2, and fill the gravel 6 in time after the geocell 9 is laid.

I、土工格室加筋碎石层4施工完毕后,通过已预埋的注浆管,按图5所示自下而上进行注浆,注浆过程中,根据注浆压力提升注浆管10,依次完成加筋碎石垫层1、加筋碎石桩3以及土工格室加筋碎石层4的注浆工作。其中下部注浆工作应连续进行,当注浆压力达到设计注浆压力后,稳压3~5分钟;当发现浆液反至地表时,降低注浆速度,防止注浆压力过大导致地表出现冒浆。必要时采用间歇注浆法,进行二次注浆或多次注浆,间歇注浆时间为0.5~1.5h,直至浆液填充满土工格室加筋碎石层4,结束注浆工作。I. After the construction of the geocell reinforced gravel layer 4 is completed, grouting is carried out from bottom to top through the pre-buried grouting pipe as shown in Figure 5. During the grouting process, the grouting pipe is lifted according to the grouting pressure 10. Complete the grouting of reinforced gravel cushion 1, reinforced gravel pile 3 and geocell reinforced gravel layer 4 in sequence. The grouting work in the lower part should be carried out continuously. When the grouting pressure reaches the designed grouting pressure, the pressure should be stabilized for 3 to 5 minutes; pulp. If necessary, use the intermittent grouting method to perform secondary grouting or multiple grouting. The intermittent grouting time is 0.5 to 1.5 hours until the grout fills the geocell reinforced gravel layer 4 and the grouting work ends.

J、待浆液凝固并达到一定强度后,铺设沥青或混凝土面层5。J. After the grout solidifies and reaches a certain strength, lay asphalt or concrete surface 5.

本实用新型提供了一种加筋碎石框架结构路基加固体系,其中,加筋碎石垫层1、加筋碎石桩3以及土工格室加筋碎石层4通过整体注浆而形成的加筋碎石框架结构加固体系,该加固体系具有结构力学性能合理、整体性和防渗性好以及承载力高等有点,显著提高了路基的整体性稳定性,增强了路基的承载特性以及抗渗性能。该路基加固体系有效地解决了路基运营过程中在车辆荷载长期作用下不均匀沉降和路面开裂严重的问题,同时具有较好的经济型和可实施性。The utility model provides a reinforced gravel frame structure subgrade reinforcement system, wherein the reinforced gravel cushion 1, the reinforced gravel pile 3 and the geocell reinforced gravel layer 4 are formed by integral grouting Reinforced crushed stone frame structure reinforcement system, the reinforcement system has the advantages of reasonable structural mechanical properties, good integrity and anti-seepage, and high bearing capacity, which significantly improves the overall stability of the subgrade, and enhances the bearing characteristics and anti-seepage of the subgrade. performance. The subgrade reinforcement system effectively solves the problems of uneven settlement and serious cracking of the road surface under the long-term action of vehicle loads during the operation of the subgrade, and is economical and practical.

最后说明的是,以上实施例仅用于说明本实用新型的技术方案而非限制,凡对本实用新型技术方案进行等效修改或等同替换,而不脱离本实用新型技术方案的宗旨和范围的,皆应属于本实用新型专利涵盖的范围内。Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model without limitation. Anyone who performs equivalent modification or equivalent replacement to the technical solution of the utility model without departing from the purpose and scope of the technical solution of the utility model, All should belong to the scope covered by the utility model patent.

Claims (5)

  1. A kind of 1. reinforced rubble frame structure subgrade strengthening system, it is characterised in that:The reinforced rubble frame structure roadbed adds Solid system includes reinforced gravel cushion(1), embankment filled soil(2), Reinforced Gravel Pile(3), geotechnical grid reinforcement metalling(4)And Surface layer(5);The geotechnical grid reinforcement metalling(4)With reinforced gravel cushion(1)It is parallel to each other;The Reinforced Gravel Pile(3) It is disposed longitudinally on geotechnical grid reinforcement metalling(4)And reinforced gravel cushion(1)Between and it is broken with geotechnical grid reinforcement respectively Rock layers(4)And reinforced gravel cushion(1)It is connected;The geotechnical grid reinforcement metalling(4)With Reinforced Gravel Pile(3)Between with And reinforced gravel cushion(1)With Reinforced Gravel Pile(3)Between be filled with embankment filled soil(2);The surface layer(5)It is laid on geotechnique Cell compartment reinforced rubble layer(4)Upper surface;The reinforced gravel cushion(1), Reinforced Gravel Pile(3)And geotechnical grid reinforcement is broken Rock layers(4)Joint slip casting is carried out by built-in slip casting pipe and forms overall reinforced rubble frame structure reinforcement system.
  2. 2. reinforced rubble frame structure subgrade strengthening system according to claim 1, it is characterised in that:The reinforced rubble Bed course(1)Including GSZ(7)Or geotechnical grid and it is filled in GSZ(7)Or the rubble in geotechnical grid(6);Institute State GSZ(7)Or geotechnical grid is one or more layers;The GSZ(7)Or geotechnical grid is when being multilayer, multi-layered Soils Work grid(7)Or geotechnical grid is mutually parallel;The rubble(6)Maximum particle diameter be not more than 100 mm;The reinforced rubble pad Layer(1)Thickness range be the m of 0.3m ~ 1.0.
  3. 3. reinforced rubble frame structure subgrade strengthening system according to claim 2, it is characterised in that:The GSZ (7)Tensile strength be not less than 100 kN/m;The GSZ(7)Fracture elongation be not more than 3%;The GSZ (7)For multilayer when, adjacent two layers GSZ(7)Between spacing be the m of 0.2 m ~ 0.4.
  4. 4. reinforced rubble frame structure subgrade strengthening system according to claim 3, it is characterised in that:The reinforced rubble Stake(3)Including GSZ sleeve(8)And it is filled in GSZ sleeve(8)Rubble in internal sleeve;The reinforcement is broken Stone mar(3)It is more;More Reinforced Gravel Piles(3)Into quincunx arrangement, adjacent two Reinforced Gravel Piles(3)Stake spacing be 3m ~5 m;The Reinforced Gravel Pile(3)Stake footpath be the m of 0.5 m ~ 1.0;The GSZ sleeve(8)The maximum grain of interior rubble Footpath is not more than 80 mm;The GSZ sleeve(8)It is made up of GSZ of the tensile strength not less than 30 kN/m.
  5. 5. the reinforced rubble frame structure subgrade strengthening system according to claim 1 or 2 or 3 or 4, it is characterised in that:Institute State geotechnical grid reinforcement metalling(4)Including geotechnical grid(9)And it is filled in geotechnical grid(9)In rubble;The geotechnique Cell compartment(9)Tensile strength be not less than 150 kN/m;The geotechnical grid(9)Fracture elongation be not more than 10%;The geotechnique Cell compartment(9)In the maximum particle diameter of rubble be not more than 100 mm;The geotechnical grid reinforcement metalling(4)Thickness be 20 cm ~50 cm。
CN201720076512.5U 2017-01-20 2017-01-20 A kind of reinforced rubble frame structure subgrade strengthening system Expired - Fee Related CN206625096U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106676993A (en) * 2017-01-20 2017-05-17 山西省交通科学研究院 Roadbed reinforcing system of reinforced gravel framework structure and reinforcing method of roadbed reinforcing system
CN110306393A (en) * 2019-07-11 2019-10-08 哈尔滨工业大学 A roadbed structure of reinforced thermal-thaw piles in degraded high-temperature permafrost regions
CN111501422A (en) * 2020-03-31 2020-08-07 温州大学 A kind of biological enzyme-cured reinforced gravel pile combined with rubber particles filled concrete canvas cell composite railway roadbed and its reinforcement method
CN113215892A (en) * 2021-05-26 2021-08-06 金陵科技学院 Grouting soil arch induced pile-supported embankment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106676993A (en) * 2017-01-20 2017-05-17 山西省交通科学研究院 Roadbed reinforcing system of reinforced gravel framework structure and reinforcing method of roadbed reinforcing system
CN110306393A (en) * 2019-07-11 2019-10-08 哈尔滨工业大学 A roadbed structure of reinforced thermal-thaw piles in degraded high-temperature permafrost regions
CN111501422A (en) * 2020-03-31 2020-08-07 温州大学 A kind of biological enzyme-cured reinforced gravel pile combined with rubber particles filled concrete canvas cell composite railway roadbed and its reinforcement method
CN113215892A (en) * 2021-05-26 2021-08-06 金陵科技学院 Grouting soil arch induced pile-supported embankment

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