WO2019007176A1 - Foam light soil railway subgrade structure and construction method - Google Patents

Foam light soil railway subgrade structure and construction method Download PDF

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Publication number
WO2019007176A1
WO2019007176A1 PCT/CN2018/089670 CN2018089670W WO2019007176A1 WO 2019007176 A1 WO2019007176 A1 WO 2019007176A1 CN 2018089670 W CN2018089670 W CN 2018089670W WO 2019007176 A1 WO2019007176 A1 WO 2019007176A1
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WIPO (PCT)
Prior art keywords
layer
concrete block
aerated concrete
autoclaved aerated
light
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PCT/CN2018/089670
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French (fr)
Chinese (zh)
Inventor
叶阳升
韩自力
李中国
蔡德钩
张千里
陈锋
李泰灃
张栋
郭浏卉
曾帅
Original Assignee
中国铁道科学研究院铁道建筑研究所
中国铁道科学研究院集团有限公司
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Publication of WO2019007176A1 publication Critical patent/WO2019007176A1/en

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2/00—General structure of permanent way
    • E01B2/006—Deep foundation of tracks
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2204/00—Characteristics of the track and its foundations
    • E01B2204/08—Deep or vertical foundation

Definitions

  • the invention belongs to the field of railway roadbed engineering, and in particular relates to a foam light soil railway subgrade structure and a construction method.
  • the roadbed In the railway construction process, the roadbed is often built on the soft foundation and the transitional section is often required to ensure the uniform transition between different structures of the line.
  • the soft foundation and the transition section will be diseased once they are not handled well. The main factor causing the disease is If the settlement deformation is too large, the application of conventional fillers to fill the roadbed will cause excessive settlement deformation. In addition to the consolidation settlement of the backfill material itself, the long-term additional load of the natural foundation soil will not be excessive.
  • the maintenance cost in the railway affects the smoothness and comfort of the railway and even threatens the safety of the train.
  • the object of the present invention is to overcome the problem of uneven settlement and other diseases under the action of vehicle load in the existing soft foundation, transition section and the like, and to provide a foam light soil railway subgrade structure, and the technical problem to be solved is to overcome the soft foundation.
  • the uneven settlement of the sections such as the transition section makes the line smoother and more comfortable, and has a very good effect in the strict settlement control section, which is more practical.
  • Another object of the present invention is to speed up construction and reduce maintenance costs during railway operations, thereby making it more practical.
  • a foam lightweight soil railway subgrade structure is constructed by autoclaved aerated concrete blocks into various forms of frame structures, and light soil is poured into the frame structure to form steaming.
  • the light-weight soil layer of the aerated concrete block has a multi-layer autoclaved aerated concrete block light soil layer.
  • the frame structure adopts a steam-filled aerated concrete block with a density of 400-500kg/m 3 , and the light is poured. The density of the soil gradually increases from the bottom to the top.
  • the foregoing foam light earth railway subgrade structure wherein the frame structure comprises a well shape, a strip shape and a triangle shape.
  • the above-mentioned foam light earth railway roadbed structure wherein the lightweight soil in the frame structure is foamed light soil, and the light soil is located in the upper layer with a density of 550-600 kg/m 3 , and other layers are light.
  • the soil density is 500-550 kg/m 3 .
  • the foregoing foam lightweight earth railway subgrade structure further comprises a metal mesh disposed between the multilayered autoclaved aerated concrete block lightweight soil layer.
  • the foregoing foam light earth railway subgrade structure further comprises a cushion layer, the cushion layer is laid on the foundation, and is located under the light soil layer of the lowest layer autoclaved aerated concrete block, and the bottom of the cushion layer Lay a layer of anti-seepage geotextile or apply anti-seepage mortar.
  • the foregoing foam light earth railway subgrade structure further comprises a geocell chamber sand layer and a seepage prevention geotextile or an anti-seepage sand cushion layer, and a geocell chamber sand layer is disposed on the top layer of the roadbed, in the geogrid
  • An anti-seepage geotextile or an anti-seepage sand cushion is disposed on the lower portion of the chamber sand layer, or an anti-seepage geotextile or an anti-seepage mortar layer is disposed between the foundation and the cushion layer.
  • the foregoing foam light earth railway roadbed structure further comprises a filler, and a conventional filler is paved on both sides of the light-weight soil layer of the multi-layer autoclaved aerated concrete block to fill and compact.
  • the above-mentioned foam light earth railway base structure wherein the autoclaved aerated concrete block light soil layer can be multi-layered from bottom to top, from the bottom layer to the surface layer, and the bottom layer The width is reduced layer by layer, and the width of the surface layer is the narrowest.
  • the foregoing foam light earth railway subgrade structure further comprises an abutment or a bridge culvert, a foundation and a bed surface layer, wherein the surface of the foundation is covered with the autoclaved aerated concrete block light soil layer.
  • the autoclaved aerated concrete block light soil layer can be multi-layered from bottom to top, and the width of each layer from bottom to top is increased layer by layer, and the width of the surface layer is the widest.
  • a method for constructing a foam lightweight soil railway subgrade structure according to the present invention is characterized in that the steps are as follows:
  • Step 1 Prefabricated autoclaved aerated concrete block
  • Step 2 laying a cushion on the foundation
  • Step 3 Build a prefabricated autoclaved aerated concrete block on the cushion layer and form a frame structure, and deposit light soil in the frame structure to form a light soil layer of the autoclaved aerated concrete block;
  • Step 4 After the pouring is completed, a metal mesh is laid on the light soil layer of the autoclaved aerated concrete block;
  • Step 5 Follow step 4 to build a multi-layer autoclaved aerated concrete block lightweight soil layer and metal mesh from the bottom to the top, and lay the upper layer of autoclaved aerated concrete block with light soil layer or no metal mesh.
  • the geocells and sand layers are laid directly on the light soil layer of the autoclaved aerated concrete block located in the uppermost layer or the geocells and sand layers are laid on the metal mesh, and the anti-seepage geotechnical is laid under the geogrid plus sand layer. Cloth or anti-seepage sand cushion;
  • Step 6 The filler is filled on both sides of the light-weight soil layer of the multi-layer autoclaved aerated concrete block and filled with pressure.
  • the foregoing method for constructing a foam lightweight earth railway subgrade structure is characterized in that after the step 1, an anti-seepage geotextile or an anti-seepage sand cushion layer is first laid, and then a mat layer is laid, and other steps are the same as claim 14.
  • the present invention has significant advantages and advantageous effects over the prior art. It has at least the following advantages:
  • the present invention has a large compressive strength at the same density; this is because the compressive strength of the autoclaved aerated concrete block of the same density during construction is greater than the compressive strength of the same density foam light soil, for example compressive strength superior product dry density 500kg / m 3 autoclaved aerated concrete block is greater than or equal to 3.5Mpa, strength and dry density of 500kg / m 3 was 2.8 Mpa light soil; in autoclaved aerated concrete In the light soil roadbed with the block as the frame, the frame composed of autoclaved aerated concrete blocks constitutes the main force-bearing structure, so the bearing strength is improved compared with the light soil roadbed.
  • the invention adopts autoclaved aerated concrete block to be prefabricated, so the quality of the block is obtained.
  • Guarantee can be directly built in the field application, and it can replace the template, so there is no need to install and disassemble the template during the construction process.
  • the pouring can be started, and the construction of the water can be formed in a small area to speed up the construction;
  • the subgrade of the autoclaved aerated concrete block used in the invention is a frame and all of the light soil is used.
  • the density of the poured light soil can be appropriately reduced, and these factors all effectively reduce the construction cost.
  • the invention inherits the advantages of foaming light soil pouring roadbed, does not require large equipment, construction
  • the invention reduces the maintenance cost of the railway, and because it can effectively reduce the disease of the railway subgrade, the maintenance cost can be reduced in the railway operation process.
  • Figure 1 is a schematic cross-sectional view showing a combined structure of a second embodiment of the present invention.
  • Figure 2 is a top plan view showing a combined structure of a second embodiment of the present invention.
  • Figure 3 is a schematic cross-sectional view showing a combined structure of a third embodiment of the present invention.
  • Figure 4 is a top plan view showing a combined structure of a third embodiment of the present invention.
  • a foam lightweight earth railway subgrade structure is constructed by autoclaved aerated concrete blocks 6 into various forms of frame structures, and
  • the lightweight soil 3 is poured into the frame structure to form a light-weight aerated concrete block lightweight soil layer, and the invention has a multi-layer autoclaved aerated concrete block light soil layer.
  • the frame structure adopts autoclaved aerated concrete block 6 with a density of 400-500 kg/m 3 , and the density of the poured light soil 3 increases gradually from bottom to top.
  • the lightweight soil 3 cast in the frame structure is foamy light soil, the light soil in the upper layer has a density of 550-600 kg/m 3 , and the other layers have a light soil density of 500-550 kg/m 3 .
  • the longitudinal direction of the frame structure is directly below the track plate.
  • the frame structure is in the form of a well, or a strip, or a triangle.
  • a foam light earth railway roadbed structure of the present invention which further comprises a metal mesh 4 and a cushion layer 2
  • the metal mesh 4 is disposed between the layers of the autoclaved aerated concrete block.
  • the cushion layer 2 is laid on the foundation and is located under the light soil layer of the lowest layer of autoclaved aerated concrete block.
  • a geocell chamber sand layer 5 is disposed on the top layer of the roadbed, and an anti-seepage geotextile or an anti-seepage sand cushion layer is disposed on the lower portion of the geocell chamber sand layer 5, or an anti-seepage geotextile or an anti-seepage mortar layer is disposed in the Between the foundation 1 and the mat 2 described.
  • Conventional packing 8 is laid on both sides of the light-weight soil layer of the multi-layer autoclaved aerated concrete block to fill and compact.
  • the method for constructing a foam light-weight railway subgrade structure of the present invention is as follows:
  • Step 1 prefabricated autoclaved aerated concrete block 6;
  • Step 2 laying a cushion 2 on the foundation 1;
  • Step 3 Build a prefabricated autoclaved aerated concrete block 6 on the mat 2 and form a frame structure, and cast light soil 3 in the frame structure to form an autoclaved aerated concrete block light soil.
  • Floor
  • Step 4 After the pouring is completed, a metal mesh is laid on the light soil layer of the autoclaved aerated concrete block;
  • Step 5 Follow step 4 to build a multi-layer autoclaved aerated concrete block lightweight soil layer and metal mesh 4 from the bottom to the top.
  • the uppermost layer of autoclaved aerated concrete block is light or soil layer laid or not laid. Laying the geocell and sand layer directly on the light soil layer of the autoclaved aerated concrete block located at the uppermost layer or laying a geocell and sand layer on the metal mesh, laying under the geocell and sand layer 5 Anti-seepage geotextile or anti-seepage sand cushion;
  • Step 6 The filler 8 is paved on both sides of the light-weight soil layer of the multi-layer autoclaved aerated concrete block and filled with pressure.
  • the anti-seepage geotextile or the anti-seepage sand cushion layer is first laid, and then the cushion layer is laid.
  • a foam light earth railway roadbed structure according to an embodiment of the second preferred embodiment of the present invention comprises a frame structure of various forms by autoclaved aerated concrete blocks 6, and this embodiment
  • light soil 3 is poured into the well-shaped frame structure to form a lightweight soil layer of autoclaved aerated concrete block, and the whole roadbed includes foundation 1, cushion 2, light soil 3, metal mesh 4, geocell room plus sand layer 5, autoclaved aerated concrete block 6, filler 8, anti-seepage geotextile or anti-seepage mortar layer.
  • the lightweight soil layer of the autoclaved aerated concrete block can be laid up from the bottom to the top, from the bottom ground to the top layer, the width of each layer from bottom to top is reduced layer by layer, the width of the surface layer The narrowest.
  • a first anti-seepage geotextile or anti-seepage mortar layer 9-1 is laid on the foundation 1.
  • a cushion layer 2 is disposed on the first impervious geotextile or impervious mortar layer 9-1, and the cushion layer 2 is a gravel cushion layer having a thickness of 10 cm and a roadbed height of 2.3 m.
  • the upper layer of autoclaved aerated concrete block light soil layer is within 1m from the top of the roadbed.
  • the upper layer of autoclaved aerated concrete block light soil layer adopts light weight with a wet density of 550-600kg/m 3
  • the soil is poured twice, and a layer of metal mesh 4 is laid between the upper layer of autoclaved aerated concrete block light soil layer and the autoclaved aerated concrete block light soil layer to prevent cracks in the poured light soil.
  • the lower layer of autoclaved aerated concrete block light soil layer is poured twice by light soil with a wet density of 500-550kg/m 3 , and the dry density of autoclaved aerated concrete block 6 in the whole roadbed is adopted.
  • the autoclaved aerated concrete block is built in two layers of 6 layers, the first layer is the road base layer, and the second layer is the upper layer of the roadbed; in this embodiment, the light soil is foam lightweight Soil, which is composed of foaming agent, diluent, cement, water, early strength agent, according to the preparation process of foam light soil by physical and chemical reaction Made out.
  • a second impervious geotextile or anti-seepage mortar layer 9-2 is placed on the top of the upper layer of the autoclaved aerated concrete block, and the thickness is set on the second impervious geotextile or the impervious mortar layer 9-2.
  • a sand layer 5 is added to the 10 cm geocell.
  • the treatment of the foundation 2 is performed first from the lower part to the upper part.
  • the indicated leveling treatment is carried out, and a layer of seepage geotextile is set up, and a 10 cm gravel cushion is placed on the top of the seepage geotextile, and the gravel cushion is from the middle to the sides.
  • the autoclaved aerated concrete block 6 is used for masonry.
  • the light soil 3 is poured, and the light soil 3 is constructed and poured.
  • the packing 8 on both sides forms a flow operation until the design elevation is reached, and a metal mesh 4 is laid between the lower layer of autoclaved aerated concrete block light soil layer and the upper layer of autoclaved aerated concrete block light soil layer, the uppermost layer
  • the surface of the casting layer should be covered with a plastic film for moisturizing maintenance.
  • the mortar layer 9-2 is oozing, and a geocell chamber sand layer 5 having a thickness of 10 cm is laid on the second impervious geotextile or the anti-seepage mortar layer 9-2, and the upper structure is designed with the conventional railway subgrade.
  • the slope of the subgrade slope is 1:1.5.
  • a PVC pipe is placed at a distance of 2 m on the base of the foam light soil road for drainage.
  • the anti-seepage geotextile is made of polyethylene or polyvinyl chloride geotextile.
  • a foam light earth railway roadbed structure is composed of autoclaved aerated concrete blocks 6 and is composed of various forms of frame structures.
  • the light soil 3 is poured in the triangular frame structure to form a light-weight aerated concrete block light soil layer, which is composed of three layers, respectively, the upper layer of autoclaved aerated concrete block light soil Layer, middle layer autoclaved aerated concrete block light soil layer and lower layer autoclaved aerated concrete block light soil layer.
  • the whole roadbed includes the side wall of the abutment 7 and the foundation 1, the cushion layer 2, the upper layer of autoclaved aerated concrete block light soil layer, the middle layer autoclaved aerated concrete block light soil layer and the lower layer autoclaved aerated concrete building Block light soil layer, metal mesh 4, geocell chamber sand layer 5, filler 7, first impervious geotextile or anti-seepage mortar 9-1 and second anti-seepage geotextile and anti-seepage mortar 9-2.
  • the foundation 1, the first anti-seepage geotextile or the anti-seepage mortar 9-1, the cushion layer 2, the upper layer autoclaved aerated concrete block, the light soil layer, the metal mesh 4, the middle layer autoclaved and gas-filled are respectively provided from bottom to top.
  • the outer layer of the autoclaved aerated concrete block is filled with filler and filled and compacted, wherein the surface layer to each layer of autoclaved aerated concrete block light soil layer is top-down width layer by layer Reduced.
  • the other structure is the same as in the first embodiment.
  • the construction method of a foam lightweight soil railway subgrade structure of the third embodiment is the same as that of the first embodiment.

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Abstract

A foam light soil railway subgrade structure. In the subgrade structure, a frame is constructed by using autoclaved aerated concrete blocks (6), and foam light soil (3) is poured into the frame, wherein the frame is constructed by using the autoclaved aerated concrete blocks (6) with the density of 400-500 kg/m3, the foam light soil (3) with the wet density of 550-600 kg/m3 is poured to form an upper light soil (3) subgrade in the railway subgrade, and the foam light soil (3) with the wet density of 500-550 kg/m3 is poured to form a lower light soil (3) subgrade in the railway subgrade. Also provided is a construction method for the subgrade structure.

Description

一种泡沫轻质土铁路路基结构及工法Foam light soil railway subgrade structure and construction method 技术领域Technical field
本发明属于铁路路基工程领域，具体是涉及一种泡沫轻质土铁路路基结构及工法。The invention belongs to the field of railway roadbed engineering, and in particular relates to a foam light soil railway subgrade structure and a construction method.
背景技术Background technique
铁路施工过程中经常在软基上修建路基以及为保证线路不同结构物间均匀过渡、常需设置过渡段，软基及过渡段一旦处理不好就会产生病害，给工程造成病害的主要因素是沉降变形过大,应用常规填料对路基进行填筑时，造成沉降变形过大的原因除回填材料自身的固结沉降外，天然地基土长期承受除自重以外过大的附加荷载也会产生过大的沉降变形；为了减少铁路的工后沉降，我国铁路在实施过程中通常进行加固处理，但是铁路在实际的运营过程中表明，由于铁路路基由散粒岩土体材料填筑而成，在列车等荷载的作用下不均匀沉降等病害依旧存在，这增加了铁路运营过程In the railway construction process, the roadbed is often built on the soft foundation and the transitional section is often required to ensure the uniform transition between different structures of the line. The soft foundation and the transition section will be diseased once they are not handled well. The main factor causing the disease is If the settlement deformation is too large, the application of conventional fillers to fill the roadbed will cause excessive settlement deformation. In addition to the consolidation settlement of the backfill material itself, the long-term additional load of the natural foundation soil will not be excessive. Settlement deformation; in order to reduce the post-construction settlement of railways, China's railways are usually reinforced during the implementation process, but the railways in the actual operation process indicate that the railway subgrade is filled with loose-grained rock and soil materials, in the train Diseases such as uneven settlement under the action of equal loads still exist, which increases the railway operation process.
中的维护成本，影响了铁路的平顺性和舒适性，甚至威胁列车的运行安全。The maintenance cost in the railway affects the smoothness and comfort of the railway and even threatens the safety of the train.
有鉴于上述现有的软基、过渡段等路段存在路基结构处理难度大等难题，本发明人经过不断的研究、设计，并经反复试作样品及改进后，终于创设出具实用价值的本发明。In view of the above difficulties in the conventional soft foundation, transition section and the like, where the roadbed structure is difficult to handle, the inventors have continuously researched and designed, and after repeated trials of samples and improvements, finally created a practical invention. .
发明内容Summary of the invention
本发明的目的在于，克服现有的软基、过渡段等路段存在车荷载的作用下不均匀沉降等病害的难题，而提供泡沫轻质土铁路路基结构，所要解决的技术 问题是克服软基和过渡段等路段的不均匀沉降，使线路更平顺，更舒适，在沉降控制严格地段有非常好的效果，从而更加实用。The object of the present invention is to overcome the problem of uneven settlement and other diseases under the action of vehicle load in the existing soft foundation, transition section and the like, and to provide a foam light soil railway subgrade structure, and the technical problem to be solved is to overcome the soft foundation. The uneven settlement of the sections such as the transition section makes the line smoother and more comfortable, and has a very good effect in the strict settlement control section, which is more practical.
本发明的另一目的在于加快施工速度，降低铁路运营过程中的维护成本，从而更加实用。Another object of the present invention is to speed up construction and reduce maintenance costs during railway operations, thereby making it more practical.
本发明的目的及解决其技术问题是采用以下技术方案来实现的。依据本发明提出的一种泡沫轻质土铁路路基结构，其是由蒸压加气混凝土砌块砌筑成各种形式的框架结构，并在所述的框架结构中浇筑轻质土，形成蒸压加气混凝土砌块轻质土层，共具有多层蒸压加气混凝土砌块轻质土层，该框架结构采用密度为400-500kg/m 3蒸压加气混凝土砌块，浇筑的轻质土密度从下至上逐渐增加。 The object of the present invention and solving the technical problems thereof are achieved by the following technical solutions. According to the present invention, a foam lightweight soil railway subgrade structure is constructed by autoclaved aerated concrete blocks into various forms of frame structures, and light soil is poured into the frame structure to form steaming. The light-weight soil layer of the aerated concrete block has a multi-layer autoclaved aerated concrete block light soil layer. The frame structure adopts a steam-filled aerated concrete block with a density of 400-500kg/m 3 , and the light is poured. The density of the soil gradually increases from the bottom to the top.
前述的一种泡沫轻质土铁路路基结构，其中所述的框架结构的形式包括井形、条形、三角形。The foregoing foam light earth railway subgrade structure, wherein the frame structure comprises a well shape, a strip shape and a triangle shape.
前述一种泡沫轻质土铁路路基结构，其中所述的框架结构的纵向位于轨道板的正下方。A foam lightweight earth railway subgrade structure as described above, wherein the frame structure has a longitudinal direction directly below the rail plate.
前述一种泡沫轻质土铁路路基结构，其中所述的框架结构内浇筑轻质土为泡沫轻质土，所述的轻质土位于上层的密度为550-600kg/m 3，其他层轻质土密度为500-550kg/m 3。 The above-mentioned foam light earth railway roadbed structure, wherein the lightweight soil in the frame structure is foamed light soil, and the light soil is located in the upper layer with a density of 550-600 kg/m 3 , and other layers are light. The soil density is 500-550 kg/m 3 .
前述的一种泡沫轻质土铁路路基结构，其还包括金属网，所述的金属网设置在多层蒸压加气混凝土砌块轻质土层之间。The foregoing foam lightweight earth railway subgrade structure further comprises a metal mesh disposed between the multilayered autoclaved aerated concrete block lightweight soil layer.
前述的一种泡沫轻质土铁路路基结构，其还包括垫层，所述的垫层铺筑在地基之上，位于最底层蒸压加气混凝土砌块轻质土层之下，垫层底部铺设一层防渗土工布或者涂抹防渗砂浆。The foregoing foam light earth railway subgrade structure further comprises a cushion layer, the cushion layer is laid on the foundation, and is located under the light soil layer of the lowest layer autoclaved aerated concrete block, and the bottom of the cushion layer Lay a layer of anti-seepage geotextile or apply anti-seepage mortar.
前述的一种泡沫轻质土铁路路基结构，其还包括土工格室加砂层和防渗土 工布或防渗砂垫层，在路基顶层设置土工格室加砂层，在所述的土工格室加砂层下部设置防渗土工布或防渗砂垫层，或者防渗土工布或防渗砂浆层设置在所述的地基和所述的垫层之间。The foregoing foam light earth railway subgrade structure further comprises a geocell chamber sand layer and a seepage prevention geotextile or an anti-seepage sand cushion layer, and a geocell chamber sand layer is disposed on the top layer of the roadbed, in the geogrid An anti-seepage geotextile or an anti-seepage sand cushion is disposed on the lower portion of the chamber sand layer, or an anti-seepage geotextile or an anti-seepage mortar layer is disposed between the foundation and the cushion layer.
前述的一种泡沫轻质土铁路路基结构，其还包括填料，在所述的多层蒸压加气混凝土砌块轻质土层两侧铺筑常规填料，填实压紧。The foregoing foam light earth railway roadbed structure further comprises a filler, and a conventional filler is paved on both sides of the light-weight soil layer of the multi-layer autoclaved aerated concrete block to fill and compact.
前述的一种泡沫轻质土铁路基结构，其中所述的蒸压加气混凝土砌块轻质土层自下而上能铺筑多层，从底层地基到面层，自下而上各层的宽度逐层减小，面层宽度最窄。The above-mentioned foam light earth railway base structure, wherein the autoclaved aerated concrete block light soil layer can be multi-layered from bottom to top, from the bottom layer to the surface layer, and the bottom layer The width is reduced layer by layer, and the width of the surface layer is the narrowest.
前述的一种泡沫轻质土铁路路基结构，其还包括桥台或桥涵、地基、基床表层，其中所述地基的上面铺筑有所述的蒸压加气混凝土砌块轻质土层，所述的蒸压加气混凝土砌块轻质土层自下而上能铺筑多层，从底层到面层，自下而上各层的宽度逐层增大，面层宽度最宽。The foregoing foam light earth railway subgrade structure further comprises an abutment or a bridge culvert, a foundation and a bed surface layer, wherein the surface of the foundation is covered with the autoclaved aerated concrete block light soil layer. The autoclaved aerated concrete block light soil layer can be multi-layered from bottom to top, and the width of each layer from bottom to top is increased layer by layer, and the width of the surface layer is the widest.
本发明的目的及解决其技术问题还采用以下技术方案来实现。依据本发明提出的一种泡沫轻质土铁路路基结构的工法，其特征在于：其步骤如下：The object of the present invention and solving the technical problems thereof are also achieved by the following technical solutions. A method for constructing a foam lightweight soil railway subgrade structure according to the present invention is characterized in that the steps are as follows:
步骤1：预制蒸压加气混凝土砌块；Step 1: Prefabricated autoclaved aerated concrete block;
步骤2：在地基上铺筑垫层；Step 2: laying a cushion on the foundation;
步骤3：在垫层上砌筑预制蒸压加气混凝土砌块并组成框架结构，在所述的框架结构内分次浇筑轻质土，形成蒸压加气混凝土砌块轻质土层；Step 3: Build a prefabricated autoclaved aerated concrete block on the cushion layer and form a frame structure, and deposit light soil in the frame structure to form a light soil layer of the autoclaved aerated concrete block;
步骤4：浇筑完成后，在蒸压加气混凝土砌块轻质土层上铺设金属网；Step 4: After the pouring is completed, a metal mesh is laid on the light soil layer of the autoclaved aerated concrete block;
步骤5：遵循步骤4自下而上铺筑多层蒸压加气混凝土砌块轻质土层及金属网,最上层的蒸压加气混凝土砌块轻质土层铺设或不铺设金属网，直接在位于最上层的蒸压加气混凝土砌块轻质土层上铺筑土工格室加砂层或在金属网上铺设土工格室加砂层，在土工格室加砂层下面铺设防渗土工布或防渗砂垫层；Step 5: Follow step 4 to build a multi-layer autoclaved aerated concrete block lightweight soil layer and metal mesh from the bottom to the top, and lay the upper layer of autoclaved aerated concrete block with light soil layer or no metal mesh. The geocells and sand layers are laid directly on the light soil layer of the autoclaved aerated concrete block located in the uppermost layer or the geocells and sand layers are laid on the metal mesh, and the anti-seepage geotechnical is laid under the geogrid plus sand layer. Cloth or anti-seepage sand cushion;
步骤6：所述的多层蒸压加气混凝土砌块轻质土层的两侧铺筑填料并填实压。Step 6: The filler is filled on both sides of the light-weight soil layer of the multi-layer autoclaved aerated concrete block and filled with pressure.
前述的一种泡沫轻质土铁路路基结构的工法，其特征在于在所述步骤1后先铺设有防渗土工布或防渗砂垫层，然后再铺设垫层，其他步骤同权利要求14。The foregoing method for constructing a foam lightweight earth railway subgrade structure is characterized in that after the step 1, an anti-seepage geotextile or an anti-seepage sand cushion layer is first laid, and then a mat layer is laid, and other steps are the same as claim 14.
本发明与现有技术相比具有明显的优点和有益效果。其至少具有下列优点：The present invention has significant advantages and advantageous effects over the prior art. It has at least the following advantages:
1、本发明在相同密度的情况下抗压强度大；这是因为在施工过程中相同密度的蒸压加气混凝土砌块的抗压强度比同密度泡沫轻质土的抗压强度大，例如干密度500kg/m 3的蒸压加气混凝土砌块的优等品的抗压强度要大于等于3.5Mpa，而干密度为500kg/m 3轻质土的强度是2.8Mpa；在蒸压加气混凝土砌块为框架的轻质土路基中，蒸压加气混凝土砌块组成的框架构成了主要的受力结构，因此与轻质土路基相比较其承载强度得到了提高。 1. The present invention has a large compressive strength at the same density; this is because the compressive strength of the autoclaved aerated concrete block of the same density during construction is greater than the compressive strength of the same density foam light soil, for example compressive strength superior product dry density 500kg / m 3 autoclaved aerated concrete block is greater than or equal to 3.5Mpa, strength and dry density of 500kg / m 3 was 2.8 Mpa light soil; in autoclaved aerated concrete In the light soil roadbed with the block as the frame, the frame composed of autoclaved aerated concrete blocks constitutes the main force-bearing structure, so the bearing strength is improved compared with the light soil roadbed.
2、本发明采用蒸压加气混凝土砌块可以预制，因此砌块的质量得到了2. The invention adopts autoclaved aerated concrete block to be prefabricated, so the quality of the block is obtained.
保障，现场应用时能够直接砌筑，并且其能够代替模板，因此施工过程中不需要模板装拆，能够砌筑一部分框架之后就可以开始浇筑，在小范围内形成流水施工，加快了施工速度；Guarantee, can be directly built in the field application, and it can replace the template, so there is no need to install and disassemble the template during the construction process. After a part of the frame can be built, the pouring can be started, and the construction of the water can be formed in a small area to speed up the construction;
3、本发明采用的蒸压加气混凝土砌块为框架的路基与全部采用轻质土3. The subgrade of the autoclaved aerated concrete block used in the invention is a frame and all of the light soil is used.
进行浇筑的路基相比不仅提高了承载强度而且还降低了造价，降低造价主要体现在蒸压加气混凝土砌块价格低；加之本发明中路基承载力得到提高，Compared with the roadbed for pouring, not only the bearing strength is increased but also the cost is lowered, and the cost is mainly reflected in the low price of the autoclaved aerated concrete block; in addition, the bearing capacity of the roadbed is improved in the invention.
因此在实际应用中可以对浇筑轻质土的密度进行适当的降低，这些因素都有效的降低了施工成本。Therefore, in practical applications, the density of the poured light soil can be appropriately reduced, and these factors all effectively reduce the construction cost.
4、本发明继承了泡沫轻质土浇筑路基的优点，不需要大型设备，施工4. The invention inherits the advantages of foaming light soil pouring roadbed, does not require large equipment, construction
时不需要振捣，不需碾压等，克服了路基在填筑过程中碾压夯实不密实的问题，特别是克服了过渡段靠近桥台处的常规填料很难进行碾压夯实的问题。There is no need to vibrate, no need to crush, etc., which overcomes the problem that the roadbed is compacted and compacted during the filling process, especially overcoming the problem that the conventional packing near the abutment is difficult to be compacted and compacted.
5、本发明降低了铁路的维护成本，由于其能够有效的减少铁路路基的病害，所以在铁路运营过程中能够减低其维护成本。5. The invention reduces the maintenance cost of the railway, and because it can effectively reduce the disease of the railway subgrade, the maintenance cost can be reduced in the railway operation process.
上述说明仅是本发明技术方案的概述，为了能够更清楚了解本发明的The above description is merely an overview of the technical solution of the present invention, in order to more clearly understand the present invention.
技术手段，而可依照说明书的内容予以实施，并且为了让本发明的上述和其他目的、特征和优点能够更明显易懂，以下特举较佳实施例，并配合附图,详细说明如下。The above and other objects, features, and advantages of the present invention will be apparent from the description and appended claims.
附图说明DRAWINGS
图1是本发明的第二实施例组合结构断面示意图。BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic cross-sectional view showing a combined structure of a second embodiment of the present invention.
图2是本发明的第二实施例组合结构俯视示意图图。Figure 2 is a top plan view showing a combined structure of a second embodiment of the present invention.
图3是本发明的第三实施例组合结构断面示意图。Figure 3 is a schematic cross-sectional view showing a combined structure of a third embodiment of the present invention.
图4是本发明的第三实施例组合结构俯视示意图图。Figure 4 is a top plan view showing a combined structure of a third embodiment of the present invention.
其中：among them:
1：地基1: foundation
2：垫层2: cushion
3：轻质土3: Light soil
4：金属网4: Metal mesh
5：土工格室加砂层5: Geocell and sand layer
6：蒸压加气混凝土砌块6: Autoclaved aerated concrete block
7：桥台7: Abutment
8：填料8: filler
9-1：第一防渗土工布或防渗砂垫层9-1: First impervious geotextile or anti-seepage sand cushion
9-2：第二防渗土工布或防渗砂垫层9-2: Second impervious geotextile or anti-seepage sand cushion
具体实施方式Detailed ways
为更进一步阐述本发明为达成预定发明目的所采取的技术手段及功效,以下结合附图及较佳实施例，对依据本发明提出的一种泡沫轻质土铁路路基结构其具体实施方式、结构、方法、步骤、特征及其功效，详细说明如后。In order to further explain the technical means and functions of the present invention for achieving the intended purpose of the invention, the specific embodiment and structure of a foam light-weight railway subgrade structure according to the present invention will be described below with reference to the accompanying drawings and preferred embodiments. , methods, steps, features and their effects, as detailed below.
实施例1Example 1
参阅图1-图4所示，本发明第一实施例的一种泡沫轻质土铁路路基结构，是由蒸压加气混凝土砌块6砌筑成各种形式的框架结构，并在所述的框架结构中浇筑轻质土3,形成蒸压加气混凝土砌块轻质土层,本发明具有多层蒸压加气混凝土砌块轻质土层。该框架结构采用密度为400-500kg/m 3蒸压加气混凝土砌块6，浇筑的轻质土3密度从下至上逐渐增加。框架结构内浇筑轻质土3为泡沫轻质土，所述的轻质土位于上层的密度为550-600kg/m 3，其他层轻质土密度为500-550kg/m 3。该框架结构的纵向位于轨道板的正下方。该框架结构的形式为井形，或条形，或三角形。 Referring to Figures 1-4, a foam lightweight earth railway subgrade structure according to a first embodiment of the present invention is constructed by autoclaved aerated concrete blocks 6 into various forms of frame structures, and The lightweight soil 3 is poured into the frame structure to form a light-weight aerated concrete block lightweight soil layer, and the invention has a multi-layer autoclaved aerated concrete block light soil layer. The frame structure adopts autoclaved aerated concrete block 6 with a density of 400-500 kg/m 3 , and the density of the poured light soil 3 increases gradually from bottom to top. The lightweight soil 3 cast in the frame structure is foamy light soil, the light soil in the upper layer has a density of 550-600 kg/m 3 , and the other layers have a light soil density of 500-550 kg/m 3 . The longitudinal direction of the frame structure is directly below the track plate. The frame structure is in the form of a well, or a strip, or a triangle.
本发明的一种泡沫轻质土铁路路基结构，其还包括金属网4、垫层2、A foam light earth railway roadbed structure of the present invention, which further comprises a metal mesh 4 and a cushion layer 2
土工格室加砂层5和防渗土工布或防渗砂垫层和填料8。所述的金属网4设置在多层蒸压加气混凝土砌块轻质土层之间。所述的垫层2铺筑在地基之上，位于最底层蒸压加气混凝土砌块轻质土层之下。在路基顶层设置土工格室加砂层5，在所述的土工格室加砂层5下部设置防渗土工布或防渗砂垫层，或者防渗土工布或防渗砂浆层设置在所述的地基1和所述的垫层2之间。在所述的多层蒸压加气混凝土砌块轻质土层两侧铺筑常规填料8，填实压紧。Geogrid with sand layer 5 and anti-seepage geotextile or anti-seepage sand cushion and packing 8. The metal mesh 4 is disposed between the layers of the autoclaved aerated concrete block. The cushion layer 2 is laid on the foundation and is located under the light soil layer of the lowest layer of autoclaved aerated concrete block. A geocell chamber sand layer 5 is disposed on the top layer of the roadbed, and an anti-seepage geotextile or an anti-seepage sand cushion layer is disposed on the lower portion of the geocell chamber sand layer 5, or an anti-seepage geotextile or an anti-seepage mortar layer is disposed in the Between the foundation 1 and the mat 2 described. Conventional packing 8 is laid on both sides of the light-weight soil layer of the multi-layer autoclaved aerated concrete block to fill and compact.
本发明的一种泡沫轻质土铁路路基结构的工法，具体步骤如下：The method for constructing a foam light-weight railway subgrade structure of the present invention is as follows:
步骤1：预制蒸压加气混凝土砌块6；Step 1: prefabricated autoclaved aerated concrete block 6;
步骤2：在地基1上铺筑垫层2；Step 2: laying a cushion 2 on the foundation 1;
步骤3：在垫层2上砌筑预制蒸压加气混凝土砌块6并组成框架结构，在所述的框架结构内分次浇筑轻质土3，形成蒸压加气混凝土砌块轻质土层；Step 3: Build a prefabricated autoclaved aerated concrete block 6 on the mat 2 and form a frame structure, and cast light soil 3 in the frame structure to form an autoclaved aerated concrete block light soil. Floor;
步骤4：浇筑完成后，在蒸压加气混凝土砌块轻质土层上铺设金属网；Step 4: After the pouring is completed, a metal mesh is laid on the light soil layer of the autoclaved aerated concrete block;
步骤5：遵循步骤4自下而上铺筑多层蒸压加气混凝土砌块轻质土层及金属网4，最上层的蒸压加气混凝土砌块轻质土层铺设或不铺设金属网，直接在位于最上层的蒸压加气混凝土砌块轻质土层上铺筑土工格室加砂层5或在金属网上铺设土工格室加砂层，在土工格室加砂层5下面铺设防渗土工布或防渗砂垫层；Step 5: Follow step 4 to build a multi-layer autoclaved aerated concrete block lightweight soil layer and metal mesh 4 from the bottom to the top. The uppermost layer of autoclaved aerated concrete block is light or soil layer laid or not laid. Laying the geocell and sand layer directly on the light soil layer of the autoclaved aerated concrete block located at the uppermost layer or laying a geocell and sand layer on the metal mesh, laying under the geocell and sand layer 5 Anti-seepage geotextile or anti-seepage sand cushion;
步骤6：所述的多层蒸压加气混凝土砌块轻质土层的两侧铺筑填料8并填实压。Step 6: The filler 8 is paved on both sides of the light-weight soil layer of the multi-layer autoclaved aerated concrete block and filled with pressure.
在所述步骤1后先铺设有防渗土工布或防渗砂垫层，然后再铺设垫层。After the step 1, the anti-seepage geotextile or the anti-seepage sand cushion layer is first laid, and then the cushion layer is laid.
实施例2Example 2
参阅图1和图2所示，本发明最佳第二实施例实施例的一种泡沫轻质土铁路路基结构，由蒸压加气混凝土砌块6组成各种形式的框架结构，本实施例为井字型框架结构，在所述的井字型框架结构内浇筑轻质土3，形成成蒸压加气混凝土砌块轻质土层，整个路基包括地基1、垫层2、轻质土3、金属网4、土工格室加砂层5、蒸压加气混凝土砌块6、填料8、防渗土工布或防渗砂浆层。如图1所示，蒸压加气混凝土砌块轻质土层自下而上能铺筑多层，从底层地基到面层，自下而上各层的宽度逐层减小，面层宽度最窄。在地基1上铺 设有第一防渗土工布或防渗砂浆层9-1。在所述的第一防渗土工布或防渗砂浆层9-1上铺设有垫层2，该垫层2为碎石垫层，该碎石垫层的厚度为10cm，路基高度为2.3m，从路基顶面向下1m的范围内为上层蒸压加气混凝土砌块轻质土层，该上层蒸压加气混凝土砌块轻质土层采用湿密度为550-600kg/m 3的轻质土并分两次进行浇筑，在上层蒸压加气混凝土砌块轻质土层和蒸压加气混凝土砌块轻质土层之间铺设有一层金属网4，防止浇筑的轻质土出现裂隙，下层蒸压加气混凝土砌块轻质土层采用湿密度为500-550kg/m 3的轻质土分两次进行浇筑，整个路基中的蒸压加气混凝土砌块6的干密度均采用400-500kg/m 3，所述的蒸压加气混凝土砌块6分两层进行砌筑，第一层为路基底层，第二层为路基上层；本实施例中轻质土为泡沫轻质土，其由发泡剂、稀释液、水泥、水、早强剂，按照泡沫轻质土的制备工艺经物理化学反应硬化而成。位于上层蒸压加气混凝土砌块轻质土层的顶部设置第二防渗土工布或防渗砂浆层9-2，并在第二防渗土工布或防渗砂浆层9-2上面设置厚度为10cm的土工格室加砂层5。 Referring to FIG. 1 and FIG. 2, a foam light earth railway roadbed structure according to an embodiment of the second preferred embodiment of the present invention comprises a frame structure of various forms by autoclaved aerated concrete blocks 6, and this embodiment For the well-shaped frame structure, light soil 3 is poured into the well-shaped frame structure to form a lightweight soil layer of autoclaved aerated concrete block, and the whole roadbed includes foundation 1, cushion 2, light soil 3, metal mesh 4, geocell room plus sand layer 5, autoclaved aerated concrete block 6, filler 8, anti-seepage geotextile or anti-seepage mortar layer. As shown in Fig. 1, the lightweight soil layer of the autoclaved aerated concrete block can be laid up from the bottom to the top, from the bottom ground to the top layer, the width of each layer from bottom to top is reduced layer by layer, the width of the surface layer The narrowest. A first anti-seepage geotextile or anti-seepage mortar layer 9-1 is laid on the foundation 1. A cushion layer 2 is disposed on the first impervious geotextile or impervious mortar layer 9-1, and the cushion layer 2 is a gravel cushion layer having a thickness of 10 cm and a roadbed height of 2.3 m. The upper layer of autoclaved aerated concrete block light soil layer is within 1m from the top of the roadbed. The upper layer of autoclaved aerated concrete block light soil layer adopts light weight with a wet density of 550-600kg/m 3 The soil is poured twice, and a layer of metal mesh 4 is laid between the upper layer of autoclaved aerated concrete block light soil layer and the autoclaved aerated concrete block light soil layer to prevent cracks in the poured light soil. The lower layer of autoclaved aerated concrete block light soil layer is poured twice by light soil with a wet density of 500-550kg/m 3 , and the dry density of autoclaved aerated concrete block 6 in the whole roadbed is adopted. 400-500kg/m 3 , the autoclaved aerated concrete block is built in two layers of 6 layers, the first layer is the road base layer, and the second layer is the upper layer of the roadbed; in this embodiment, the light soil is foam lightweight Soil, which is composed of foaming agent, diluent, cement, water, early strength agent, according to the preparation process of foam light soil by physical and chemical reaction Made out. A second impervious geotextile or anti-seepage mortar layer 9-2 is placed on the top of the upper layer of the autoclaved aerated concrete block, and the thickness is set on the second impervious geotextile or the impervious mortar layer 9-2. A sand layer 5 is added to the 10 cm geocell.
本实施例的一种泡沫轻质土铁路路基结构的工法如下：The construction method of a foam lightweight soil railway subgrade structure of this embodiment is as follows:
1、从下部到上部先进行地基2的处理。1. The treatment of the foundation 2 is performed first from the lower part to the upper part.
2、地基2处理完后，进行表明的整平处理，并设置一层渗水土工布，在渗水土工布的上面铺垫10cm的碎石垫层，碎石垫层从中间到两边2. After the foundation 2 is processed, the indicated leveling treatment is carried out, and a layer of seepage geotextile is set up, and a 10 cm gravel cushion is placed on the top of the seepage geotextile, and the gravel cushion is from the middle to the sides.
设置4％的坡度，碎石垫层铺设完成后，铺设第一层防渗土工布或防渗砂浆层9-1。Set the slope of 4%. After the gravel cushion is laid, lay the first layer of anti-seepage geotextile or anti-seepage mortar layer 9-1.
3、根据设计宽度、轨道位置、框架结构等要求使用蒸压加气混凝土砌块6进行砌筑，当砌筑一部分后进行轻质土3的浇筑，并且使砌筑、浇筑轻质土3与两侧的填料8形成流水作业，直至达到设计标高，在下层蒸压加气混凝土砌 块轻质土层与上层蒸压加气混凝土砌块轻质土层之间铺设金属网4，最上层的浇筑层表面要覆盖塑料膜进行保湿养护。3. According to the design width, track position, frame structure, etc., the autoclaved aerated concrete block 6 is used for masonry. When a part of the masonry is built, the light soil 3 is poured, and the light soil 3 is constructed and poured. The packing 8 on both sides forms a flow operation until the design elevation is reached, and a metal mesh 4 is laid between the lower layer of autoclaved aerated concrete block light soil layer and the upper layer of autoclaved aerated concrete block light soil layer, the uppermost layer The surface of the casting layer should be covered with a plastic film for moisturizing maintenance.
4、上层蒸压加气混凝土砌块轻质土层的顶部铺设第二防渗土工布或防4. Laying the second impervious geotextile on the top of the upper layer of autoclaved aerated concrete block
渗砂浆层9-2，并在第二防渗土工布或防渗砂浆层9-2上面铺设厚度为10cm的土工格室加砂层5，其上部结构同常规铁路路基设计。The mortar layer 9-2 is oozing, and a geocell chamber sand layer 5 having a thickness of 10 cm is laid on the second impervious geotextile or the anti-seepage mortar layer 9-2, and the upper structure is designed with the conventional railway subgrade.
5、在整体结构完成后，进行刷坡满足铁路设计要求；并进行边坡防护工程。5. After the completion of the overall structure, the brush slope is met to meet the railway design requirements; and the slope protection project is carried out.
6、本例中路基边坡的坡度为1:1.5，在泡沫轻质土路基层每间隔2米设置一个PVC管进行排水，防渗土工布为聚乙烯或聚氯乙烯土工布。6. In this example, the slope of the subgrade slope is 1:1.5. A PVC pipe is placed at a distance of 2 m on the base of the foam light soil road for drainage. The anti-seepage geotextile is made of polyethylene or polyvinyl chloride geotextile.
实施例3Example 3
参阅图3和图4所示，本发明最佳第三实施例的一种泡沫轻质土铁路路基结构，由蒸压加气混凝土砌块6组成组成各种形式的框架结构，本实施例为三角形型框架结构，在所述的三角形型框架结构内浇筑轻质土3，形成蒸压加气混凝土砌块轻质土层，共3层，分别为上层蒸压加气混凝土砌块轻质土层、中层蒸压加气混凝土砌块轻质土层和下层蒸压加气混凝土砌块轻质土层。整个路基包括桥台7的侧壁和地基1、垫层2、上层蒸压加气混凝土砌块轻质土层、中层蒸压加气混凝土砌块轻质土层和下层蒸压加气混凝土砌块轻质土层、金属网4、土工格室加砂层5、填料7、第一防渗土工布或防渗砂浆9-1和第二防渗土工布和防渗砂浆9-2。其中由下至上分别设置有地基1、第一防渗土工布或防渗砂浆9-1、垫层2、上层蒸压加气混凝土砌块轻质土层、金属网4、中层蒸压加气混凝土砌块轻质土层金属网4、下层蒸压加气混凝土砌块轻质土层、第二防渗土工布或防渗砂浆9-2和土工格室加砂层5。蒸压加气混凝土砌块轻质土层外侧填筑填料并填实压紧，其中，所述的面层到各层蒸压加气混凝土砌 块轻质土层是自上而下宽度逐层减小。其他结构同实施例1。本实施例3的一种泡沫轻质土铁路路基结构的工法同实施例1。Referring to FIG. 3 and FIG. 4, a foam light earth railway roadbed structure according to a third preferred embodiment of the present invention is composed of autoclaved aerated concrete blocks 6 and is composed of various forms of frame structures. In the triangular frame structure, the light soil 3 is poured in the triangular frame structure to form a light-weight aerated concrete block light soil layer, which is composed of three layers, respectively, the upper layer of autoclaved aerated concrete block light soil Layer, middle layer autoclaved aerated concrete block light soil layer and lower layer autoclaved aerated concrete block light soil layer. The whole roadbed includes the side wall of the abutment 7 and the foundation 1, the cushion layer 2, the upper layer of autoclaved aerated concrete block light soil layer, the middle layer autoclaved aerated concrete block light soil layer and the lower layer autoclaved aerated concrete building Block light soil layer, metal mesh 4, geocell chamber sand layer 5, filler 7, first impervious geotextile or anti-seepage mortar 9-1 and second anti-seepage geotextile and anti-seepage mortar 9-2. Among them, the foundation 1, the first anti-seepage geotextile or the anti-seepage mortar 9-1, the cushion layer 2, the upper layer autoclaved aerated concrete block, the light soil layer, the metal mesh 4, the middle layer autoclaved and gas-filled are respectively provided from bottom to top. Concrete block light soil metal mesh 4, lower layer autoclaved aerated concrete block light soil layer, second impervious geotextile or anti-seepage mortar 9-2 and geocell chamber plus sand layer 5. The outer layer of the autoclaved aerated concrete block is filled with filler and filled and compacted, wherein the surface layer to each layer of autoclaved aerated concrete block light soil layer is top-down width layer by layer Reduced. The other structure is the same as in the first embodiment. The construction method of a foam lightweight soil railway subgrade structure of the third embodiment is the same as that of the first embodiment.
以上所述，仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明,任何熟悉本专业的技术人员，在不脱离本发明技术方案范围内,当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例,但凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention. The skilled person can make some modifications or modifications to the equivalent embodiments by using the above-disclosed technical contents without departing from the technical scope of the present invention, but the present invention does not deviate from the technical solution of the present invention. Technical essence of the above embodiment
所作的任何简单修改、等同变化与修饰，均仍属于本发明技术方案的范围内。Any simple modifications, equivalent changes and modifications made by the invention are still within the scope of the technical solutions of the present invention.

Claims (12)

  1. 一种泡沫轻质土铁路路基结构，其特征在于是由蒸压加气混凝土砌块砌筑成各种形式的框架结构，并在所述的框架结构中浇筑轻质土，形成蒸压加气混凝土砌块轻质土层，共具有多层蒸压加气混凝土砌块轻质土层，该框架结构采用密度为400-500kg/m 3蒸压加气混凝土砌块，浇筑的轻质土密度从下至上逐渐增加。 A foam light soil railway subgrade structure, characterized in that the autoclaved aerated concrete block is built into various forms of frame structure, and light soil is poured in the frame structure to form autoclaved and aerated gas. Lightweight soil layer of concrete block, with a multi-layer autoclaved aerated concrete block light soil layer. The frame structure adopts autoclaved aerated concrete block with density of 400-500kg/m 3 , and the density of light soil is poured. Gradually increase from bottom to top.
  2. 根据权利要求1所述的一种泡沫轻质土铁路路基结构，其特征在于所述的框架结构的形式包括井形、条形、三角形。A foam lightweight earth railway subgrade structure according to claim 1, wherein the frame structure comprises a well shape, a strip shape, and a triangle shape.
  3. 根据权利要求1所述一种泡沫轻质土铁路路基结构，其特征在于所述的框架结构的纵向位于轨道板的正下方。A foam lightweight earth railway subgrade structure according to claim 1, wherein said frame structure has a longitudinal direction directly below the rail plate.
  4. 根据权利要求1所述一种泡沫轻质土铁路路基结构，其特征在于，在所述的框架结构内浇筑轻质土为泡沫轻质土，所述的轻质土位于上层的密度为550-600kg/m 3，其他层轻质土密度为500-550kg/m 3。 The foam light earth railway subgrade structure according to claim 1, wherein the light soil is poured into the foam structure in the frame structure, and the light soil is located in the upper layer and has a density of 550- 600kg/m 3 , other layers of light soil density is 500-550kg / m 3 .
  5. 根据权利要求1所述的一种泡沫轻质土铁路路基结构，其特征在于还包括金属网,所述的金属网设置在多层蒸压加气混凝土砌块轻质土层之间。A foam lightweight earth railway subgrade structure according to claim 1, further comprising a metal mesh disposed between the plurality of layers of autoclaved aerated concrete block lightweight soil.
  6. 根据权利要求1所述的一种泡沫轻质土铁路路基结构，其特征在于还包括垫层，所述的垫层铺筑在地基之上，位于最底层蒸压加气混凝土砌块轻质土层之下。A foam light earth railway subgrade structure according to claim 1, further comprising a cushion layer which is laid on the foundation and located at the bottom layer of the autoclaved aerated concrete block light soil Below the layer.
  7. 根据权利要求1所述的一种泡沫轻质土铁路路基结构，其特征在于还包括土工格室加砂层和防渗土工布或防渗砂垫层，在路基顶层设置土工格室加砂层，在所述的土工格室加砂层下部设置防渗土工布或防渗砂垫层，或者防渗土工布或防渗砂浆层设置在所述的地基和所述的垫层之间。A foam light earth railway subgrade structure according to claim 1, further comprising a geocell sanding layer and a geotextile cloth or an anti-seepage sand cushion layer, and a geocell chamber sand layer is disposed on the top layer of the roadbed. An anti-seepage geotextile or an anti-seepage sand cushion layer is disposed on the lower portion of the geocell chamber sand layer, or an anti-seepage geotextile or an anti-seepage mortar layer is disposed between the foundation and the cushion layer.
  8. 根据权利要求1所述的一种泡沫轻质土铁路路基结构，其特征在于还包括填料，在所述的多层蒸压加气混凝土砌块轻质土层两侧铺筑常规填料，填实压紧。A foam light earth railway subgrade structure according to claim 1, further comprising a filler, paving conventional fillers on both sides of the multilayered autoclaved aerated concrete block lightweight soil layer, filling Press tight.
  9. 根据权利要求1-8中任意一项所述的一种泡沫轻质土铁路路基结构，其特征在于所述的蒸压加气混凝土砌块轻质土层自下而上能铺筑A foam light earth railway subgrade structure according to any one of claims 1-8, characterized in that the autoclaved aerated concrete block light soil layer is paved from bottom to top
    多层，从底层地基到面层，自下而上各层的宽度逐层减小，面层宽度最窄。Multi-layer, from the bottom layer to the surface layer, the width of each layer from bottom to top is reduced layer by layer, and the width of the surface layer is the narrowest.
  10. 根据权利要求1-8中任意一项所述的一种泡沫轻质土铁路路基结构，其特征在于其还包括桥台或桥涵、地基、基床表层，其中所述地基的上面铺筑有所述的蒸压加气混凝土砌块轻质土层，所述的蒸压加气混凝土砌块轻质土层自下而上能铺筑多层，从底层到面层，自下而上各层的宽度逐层增大，面层宽度最宽。A foam lightweight earth railway subgrade structure according to any one of claims 1-8, characterized in that it further comprises an abutment or a bridge culvert, a foundation, a bed surface layer, wherein the foundation is paved above The autoclaved aerated concrete block light soil layer, the autoclaved aerated concrete block light soil layer can be multi-layered from bottom to top, from bottom layer to surface layer, bottom to top layer The width is increased layer by layer, and the width of the surface layer is the widest.
  11. 根据权利要求1-10所述的一种泡沫轻质土铁路路基结构的工法，其特征在于：其步骤如下：A foam light earth railway subgrade structure according to any of claims 1-10, characterized in that the steps are as follows:
    步骤1：预制蒸压加气混凝土砌块；Step 1: Prefabricated autoclaved aerated concrete block;
    步骤2：在地基上铺筑垫层；Step 2: laying a cushion on the foundation;
    步骤3：在垫层上砌筑预制蒸压加气混凝土砌块并组成框架结构，在所述的框架结构内分次浇筑轻质土，形成蒸压加气混凝土砌块轻质土层；Step 3: Build a prefabricated autoclaved aerated concrete block on the cushion layer and form a frame structure, and deposit light soil in the frame structure to form a light soil layer of the autoclaved aerated concrete block;
    步骤4：浇筑完成后，在蒸压加气混凝土砌块轻质土层上铺设金网；Step 4: After the pouring is completed, a gold net is laid on the light soil layer of the autoclaved aerated concrete block;
    步骤5：遵循步骤4自下而上铺筑多层蒸压加气混凝土砌块轻质土层及金属网，最上层的蒸压加气混凝土砌块轻质土层铺设或不铺设金属网，直Step 5: Follow step 4 to build a multi-layer autoclaved aerated concrete block lightweight soil layer and metal mesh from the bottom to the top, and lay the upper layer of autoclaved aerated concrete block with light soil layer or no metal mesh. straight
    接在位于最上层的蒸压加气混凝土砌块轻质土层上铺筑土工格室加砂层或在金属网上铺设土工格室加砂层，在土工格室加砂层下面铺设防渗土工布或防渗砂垫层；Attach a geocell to the sand layer of the autoclaved aerated concrete block located on the uppermost layer or place a geocell and sand layer on the metal mesh, and lay an anti-seepage geotechnical under the geogrid plus sand layer. Cloth or anti-seepage sand cushion;
    步骤6：所述的多层蒸压加气混凝土砌块轻质土层的两侧铺筑填料并填实压。Step 6: The filler is filled on both sides of the light-weight soil layer of the multi-layer autoclaved aerated concrete block and filled with pressure.
  12. 根据权利要求11所述的一种泡沫轻质土铁路路基结构的工法，其特征在于在所述步骤1后先铺设有防渗土工布或防渗砂垫层，然后再铺设垫层，其他步骤同权利要求11。The method for constructing a foam light earth railway subgrade structure according to claim 11, characterized in that after the step 1, an anti-seepage geotextile or an anti-seepage sand cushion layer is firstly laid, and then the cushion layer is laid, and other steps are performed. Same as claim 11.
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