CN115165489B - A method for preparing a circular reinforced pile specimen - Google Patents
A method for preparing a circular reinforced pile specimen Download PDFInfo
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- CN115165489B CN115165489B CN202210765777.1A CN202210765777A CN115165489B CN 115165489 B CN115165489 B CN 115165489B CN 202210765777 A CN202210765777 A CN 202210765777A CN 115165489 B CN115165489 B CN 115165489B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000000945 filler Substances 0.000 claims abstract description 18
- 230000002787 reinforcement Effects 0.000 claims abstract description 13
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- -1 polypropylene Polymers 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 239000004746 geotextile Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 abstract description 9
- 238000012360 testing method Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 8
- 239000002689 soil Substances 0.000 abstract description 4
- 101001121408 Homo sapiens L-amino-acid oxidase Proteins 0.000 description 3
- 102100026388 L-amino-acid oxidase Human genes 0.000 description 3
- 101100012902 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) FIG2 gene Proteins 0.000 description 1
- 101100233916 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) KAR5 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005464 sample preparation method Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
本发明公开了一种用于制备环向加筋桩试样的方法,将加筋套筒底部沿环向固定在底部固定底盘和底部固定环之间，采用支撑限位杆将加筋套筒顶部下固定环固定在设定高度，并将加筋套筒顶部沿环向固定在顶部下固定环和顶部上固定环之间，最后将桩体填料分层注入加筋套筒内，并根据试验要求进行试样的振捣和养护。本发明方法克服了已有制样技术无法保障环向加筋材料与桩体填料紧密贴合、成样后试样底部和顶部凹凸不平、制备试样的高度和形状不可根据试验所需进行调节、制备环向加筋固化土桩试样时极易出现内部填料渗漏等不足，使得所制备试样的环向加筋套筒和桩体具有较高的贴合度，且具有便于脱模且成样质量高的优点。
The present invention discloses a method for preparing annular reinforced pile samples, wherein the bottom of the reinforced sleeve is fixed annularly between the bottom fixed chassis and the bottom fixed ring, the lower fixed ring at the top of the reinforced sleeve is fixed at a set height by a support limit rod, and the top of the reinforced sleeve is fixed annularly between the top lower fixed ring and the top upper fixed ring, and finally the pile body filler is injected into the reinforced sleeve in layers, and the sample is vibrated and cured according to the test requirements. The method of the present invention overcomes the shortcomings of the existing sample preparation technology that cannot ensure the close fit between the annular reinforcement material and the pile body filler, the uneven bottom and top of the sample after the sample is formed, the height and shape of the prepared sample cannot be adjusted according to the test requirements, and the internal filler is very likely to leak when preparing the annular reinforced solidified soil pile sample, so that the annular reinforcement sleeve and the pile body of the prepared sample have a higher degree of fit, and have the advantages of easy demoulding and high sample quality.
Description
技术领域Technical Field
本发明涉及桩体的制作方法，尤其涉及用于制备环向加筋桩试样的方法。The invention relates to a method for manufacturing a pile body, in particular to a method for preparing a ring-reinforced pile sample.
背景技术Background technique
室内试验是研究各类环向加筋桩承载变形特性的重要途径，环向加筋桩试样制备是保障试验精准实施的关键。现有制样模具和方法多针对尺寸较小(直径3.8cm高度8cm)的标准三轴试样展开。相对于标准三轴试验的小型试样，大型试样所需试样在直径、高度和重量上都有较大增加，这给试样的制备提出更高的要求的同时也增加了试样制备的难度。少有的大型制样筒多为钢制圆筒，并通过简易的构件固定其位置，无法保障环向加筋材料与桩体填料紧密贴合，且成样后试样底部和顶部凹凸不平，制备试样的高度和形状不可根据试验所需进行调节；用于制备环向加筋固化土桩试样时极易出现内部填料渗漏的现象。Indoor testing is an important way to study the bearing and deformation characteristics of various types of annular reinforced piles. The preparation of annular reinforced pile specimens is the key to ensuring the accurate implementation of the test. Existing sample preparation molds and methods are mostly carried out for standard triaxial specimens with smaller sizes (3.8 cm in diameter and 8 cm in height). Compared with the small specimens of standard triaxial tests, the diameter, height and weight of large specimens are greatly increased, which puts higher requirements on the preparation of specimens and increases the difficulty of specimen preparation. The few large sample preparation cylinders are mostly steel cylinders, and their positions are fixed by simple components. It is impossible to ensure that the annular reinforcement material fits tightly with the pile body filler. After the sample is formed, the bottom and top of the sample are uneven. The height and shape of the prepared sample cannot be adjusted according to the test requirements; when used to prepare annular reinforced solidified soil pile specimens, internal filler leakage is very likely to occur.
综上，亟需提出一种形状尺寸可调、能够保证内部填料与环向套筒紧密贴合、底面和顶面平整的环向加筋桩试样的制样模具和方法。In summary, it is urgent to propose a sample preparation mold and method for annular reinforced pile specimens with adjustable shape and size, which can ensure that the internal filler fits tightly with the annular sleeve and has flat bottom and top surfaces.
发明内容Summary of the invention
本发明的目的在于克服已有技术的不足，提供一种便于脱模且成样质量高的用于制备环向加筋桩试样的方法。The purpose of the present invention is to overcome the shortcomings of the prior art and provide a method for preparing annular reinforced pile specimens which is easy to demould and has high sample quality.
本发明的一种用于制备环向加筋桩试样的方法，包括以下步骤：A method for preparing a ring-reinforced pile specimen of the present invention comprises the following steps:
步骤一、将加筋套筒的底边沿环向夹在固定底座和固定底环之间并采用穿过固定底座和固定底环之间的多个下螺丝和螺母固定在固定底座和固定底环之间；所述的加筋套筒的底部为闭口封闭结构且沿水平方向设置在底部固定环内；Step 1: clamp the bottom edge of the reinforced sleeve between the fixed base and the fixed bottom ring along the annular direction and fix it between the fixed base and the fixed bottom ring by using a plurality of lower screws and nuts passing through the fixed base and the fixed bottom ring; the bottom of the reinforced sleeve is a closed structure and is arranged in the bottom fixed ring along the horizontal direction;
步骤二、将沿竖直方向设置的多根带有螺头的螺杆穿过固定底座、加筋套筒的底边以及固定底环上的螺纹孔，然后将所述的螺杆的螺头端通过螺母与固定底座以及固定底环旋紧固定相连；Step 2: Pass multiple screws with screw heads arranged in the vertical direction through the threaded holes on the fixed base, the bottom edge of the reinforced sleeve and the fixed bottom ring, and then tighten and fix the screw head ends of the screws to the fixed base and the fixed bottom ring through nuts;
步骤三，在每根螺杆上部螺纹连接一个下螺母并调整至设定高度，然后将顶部下固定环通过开在顶部下固定环上的开孔穿过各个螺杆支撑在下螺母上；Step 3, threading a lower nut on the upper part of each screw rod and adjusting it to a set height, and then passing the top lower fixing ring through the openings on the top lower fixing ring through each screw rod and supporting it on the lower nut;
步骤四、将所述的加筋套筒的顶边沿环向翻折在顶部下固定环顶壁上，然后将顶部上固定环通过开在顶部上固定环上的开孔穿过各个螺杆压在加筋套筒的顶边上，再通过穿过顶部上固定环、加筋套筒的顶边和顶部下固定环的多个上螺丝固定在顶部上固定环和顶部下固定环之间，最后在每根螺杆上拧紧一个上螺母使得顶部上固定环与螺杆固定连接；Step 4, fold the top edge of the reinforced sleeve along the annular direction onto the top wall of the top lower fixing ring, then pass the top upper fixing ring through the openings on the top upper fixing ring and through each screw to press it onto the top edge of the reinforced sleeve, then fix it between the top upper fixing ring and the top lower fixing ring by passing through a plurality of upper screws on the top upper fixing ring, the top edge of the reinforced sleeve and the top lower fixing ring, and finally tighten an upper nut on each screw to fix the top upper fixing ring and the screw in a fixed connection;
步骤五、将环向加筋桩桩体填料分层注入加筋套筒内，直至达到试样高度，并进行振捣；Step 5: inject the pile body filler of the annular reinforced pile into the reinforcement sleeve in layers until it reaches the sample height, and vibrate it;
步骤六、在环向加筋桩桩体填料顶部放置一个与环向加筋桩桩体填料顶部形状吻合的找平圆盘，材质为聚丙烯。Step 6: Place a leveling disc made of polypropylene that matches the shape of the top of the annular reinforced pile body filler on the top of the annular reinforced pile body filler.
采用本方法有益效果是：The beneficial effects of adopting this method are:
1.本发明具有结构简单、形状及尺寸可调等优点，同时可有效防止环向加筋桩桩体填料渗漏，便于脱模且成品质量高，适用于桩体填料为任意类型的环向加筋桩试样的制备。1. The present invention has the advantages of simple structure, adjustable shape and size, etc., and can effectively prevent the leakage of the pile body filler of the annular reinforced pile, is easy to demould and has high quality of finished products, and is suitable for the preparation of annular reinforced pile samples with pile body fillers of any type.
3.本发明可以保障桩体材料在自重作用下与加筋套筒紧密结合，解决了传统制样方法存在的两者结合不紧密，贴合度差的缺点。3. The present invention can ensure that the pile material is tightly combined with the reinforcement sleeve under the action of its own weight, thereby solving the shortcomings of the traditional sample preparation method that the two are not tightly combined and the fit is poor.
4.模具的形状和直径可以根据试样的需求进行定制(如正方形、圆形、五边形等)，可根据需求灵活调整限位杆高度，满足制样高度要求，且本模具可以多次重复使用。4. The shape and diameter of the mold can be customized according to the needs of the sample (such as square, circle, pentagon, etc.), and the height of the limit rod can be flexibly adjusted according to the needs to meet the sample preparation height requirements, and this mold can be reused many times.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1为本发明的一种用于制备环向加筋桩试样方法采用的模具的结构示意图；FIG1 is a schematic structural diagram of a mold used in a method for preparing a circumferentially reinforced pile specimen according to the present invention;
图2为图1所示结构的左视图；FIG2 is a left side view of the structure shown in FIG1;
图3为图1所示结构的底视图；FIG3 is a bottom view of the structure shown in FIG1 ;
图4为采用图1所示模具完成填料的立体图。FIG. 4 is a three-dimensional view of the packing completed by using the mold shown in FIG. 1 .
具体实施方式Detailed ways
下面结合附图和具体实施方式对本发明作以详细描述。The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments.
如附图所示本发明的一种用于制备环向加筋桩试样的方法，包括以下步骤：As shown in the accompanying drawings, a method for preparing a circumferential reinforced pile specimen of the present invention comprises the following steps:
步骤一、将加筋套筒12的底边沿环向夹在固定底座1和固定底环2之间并采用穿过固定底座1和固定底环2之间的多个下螺丝4和螺母5固定在固定底座1和固定底环2之间；所述的加筋套筒12优选的采用土工布；所述的加筋套筒12的底部为闭口封闭结构3且沿水平方向设置在底部固定环2内，这样可以撑紧加筋套筒12，并使其待装填的内部桩体底部形状更加规则，增强密闭性，防止填料渗漏。Step 1, clamp the bottom edge of the reinforced sleeve 12 between the fixed base 1 and the fixed bottom ring 2 along the annular direction and fix it between the fixed base 1 and the fixed bottom ring 2 by using multiple lower screws 4 and nuts 5 passing through the fixed base 1 and the fixed bottom ring 2; the reinforced sleeve 12 preferably adopts geotextile; the bottom of the reinforced sleeve 12 is a closed structure 3 and is arranged in the bottom fixed ring 2 along the horizontal direction, so that the reinforced sleeve 12 can be tightened, and the bottom shape of the internal pile body to be filled is more regular, the airtightness is enhanced, and the filler leakage is prevented.
步骤二、将沿竖直方向设置的多根带有螺头的螺杆6穿过固定底座1、加筋套筒12的底边以及固定底环2上的螺纹孔，然后将所述的螺杆的螺头端通过螺母与固定底座1以及固定底环2旋紧固定相连；Step 2: Pass multiple screws 6 with screw heads arranged in the vertical direction through the threaded holes on the fixed base 1, the bottom edge of the reinforced sleeve 12 and the fixed bottom ring 2, and then tighten and fix the screw heads of the screws to the fixed base 1 and the fixed bottom ring 2 through nuts;
步骤三，在每根螺杆上部螺纹连接一个下螺母并调整至设定高度，然后将顶部下固定环通过开在顶部下固定环上的开孔穿过各个螺杆支撑在下螺母7上；Step 3, a lower nut is threadedly connected to the upper part of each screw rod and adjusted to a set height, and then the top lower fixing ring is passed through the openings on the top lower fixing ring through each screw rod and supported on the lower nut 7;
步骤四、将所述的加筋套筒12的顶边沿环向翻折在顶部下固定环8顶壁上，然后将顶部上固定环通过开在顶部上固定环上的开孔穿过各个螺杆压在加筋套筒12的顶边上，再通过穿过顶部上固定环9、加筋套筒12的顶边和顶部下固定环的多个上螺丝10固定在顶部上固定环和顶部下固定环之间，最后在每根螺杆上拧紧一个上螺母11使得顶部上固定环与螺杆固定连接；Step 4, fold the top edge of the reinforcing sleeve 12 along the annular direction onto the top wall of the top lower fixing ring 8, then pass the top upper fixing ring through the openings on the top upper fixing ring and through each screw to press it onto the top edge of the reinforcing sleeve 12, and then fix it between the top upper fixing ring and the top lower fixing ring by passing through the top upper fixing ring 9, the top edge of the reinforcing sleeve 12 and the top lower fixing ring through multiple upper screws 10, and finally tighten an upper nut 11 on each screw to fix the top upper fixing ring and the screw in a fixed connection;
步骤五、将环向加筋桩桩体填料13分层注入加筋套筒12内，直至达到试样高度，并进行振捣。Step 5: Inject the pile body filler 13 of the annular reinforced pile into the reinforcement sleeve 12 in layers until it reaches the sample height, and vibrate it.
步骤六、在环向加筋桩桩体填料顶部放置一个与环向加筋桩桩体填料顶部形状吻合的找平圆盘，材质为聚丙烯，可以使制备试样的顶部更加平整。Step 6: Place a leveling disc made of polypropylene that matches the shape of the top of the annular reinforced pile body filler on the top of the annular reinforced pile body filler to make the top of the prepared sample smoother.
优选的，在所述的加筋套筒12的底边和顶边处分别设置有多个切口以便加筋套筒12的底边和顶边能够方便的翻折。Preferably, a plurality of cutouts are respectively provided at the bottom edge and the top edge of the reinforcement sleeve 12 so that the bottom edge and the top edge of the reinforcement sleeve 12 can be conveniently folded.
所述的固定底座1、固定底环2、螺杆、顶部上固定环和顶部下固定环可为有机玻璃板、PVC板和钢材等任意材料。The fixed base 1, the fixed bottom ring 2, the screw rod, the top upper fixed ring and the top lower fixed ring can be made of any material such as organic glass plate, PVC plate and steel.
所述的找平圆盘材质可为聚丙烯、钢材等。The material of the leveling disc can be polypropylene, steel, etc.
所述的闭口封闭结构3和找平圆盘的厚度可为0.5-2cm。The thickness of the closed structure 3 and the leveling disc can be 0.5-2 cm.
环向加筋桩由环向加筋套筒将桩体包裹而成，其内部桩体可为建筑固废、天然碎石等散体，或固化土等连续体；若桩体为固化土材料，则根据要求进行养护。The annular reinforced pile is formed by wrapping the pile body with an annular reinforcement sleeve. The internal pile body can be a loose body such as construction solid waste, natural gravel, or a continuous body such as solidified soil. If the pile body is made of solidified soil material, it shall be maintained according to requirements.
环向加筋套筒利用土工合成材料，可采用土工布、土工格栅、橡胶套等任意可折叠柔性材料，该材料具有较强的抗拉性能，对桩体具有径向约束作用，可大幅度提高单桩承载力并降低侧向变形。The annular reinforced sleeve uses geosynthetics, and can adopt any foldable flexible materials such as geotextile, geogrid, rubber sleeve, etc. This material has strong tensile properties and has a radial restraint effect on the pile body, which can greatly improve the bearing capacity of a single pile and reduce lateral deformation.
采用本方法制备的环向加筋桩试样可用于室内模型试验、单轴压缩试验和三轴试验等,试验方法参见《土工试验规程》SL237-1999。The annular reinforced pile specimens prepared by this method can be used for indoor model tests, uniaxial compression tests and triaxial tests, etc. The test methods refer to the Geotechnical Test Code SL237-1999.
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| 加筋对桩承式路堤变形模式与土拱效应影响试验;芮瑞;万亿;陈成;庄妍;张凯;;中国公路学报;20200115(第01期);全文 * |
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