CN110777764A - Roadbed ramming influence depth testing device and testing method - Google Patents

Roadbed ramming influence depth testing device and testing method Download PDF

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CN110777764A
CN110777764A CN201911046168.5A CN201911046168A CN110777764A CN 110777764 A CN110777764 A CN 110777764A CN 201911046168 A CN201911046168 A CN 201911046168A CN 110777764 A CN110777764 A CN 110777764A
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measuring
bearing plate
piston
pipe
roadbed
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袁霈龙
杨治军
王东
刘毅鑫
崔志猛
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Changan University
CCCC SHEC Dong Meng Engineering Co Ltd
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CCCC SHEC Dong Meng Engineering Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D1/00Investigation of foundation soil in situ

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Abstract

本发明公开了一种路基夯击影响深度测试装置及测试方法,固定系统包括顶部承力板,顶部承力板套设在固定支撑筒上;活动支撑杆的上端与顶部承力板连接,其下端伸入待测路基填料层中;压缩系统包括活塞杆,活塞杆的上端与顶部承力板连接,下端与活塞体连接,活塞体设置在活塞外管内,活塞外管内设置测量液,活塞外管设置有测量液出口;测读系统包括测量管,测量管的一端与测量液出口连通;另一端与大气连通且竖向固定设置在刻度尺上;本发明通过将路基填料的相对位移采用测量液液柱的上升高度直观测量;顶部承力板的相对位移量为路基填料的孔隙度减小量,当路基填料测点处的相对位移接近于零时,判定为无夯击加固效果,实现了对夯击影响深度的测定。

Figure 201911046168

The invention discloses a test device and a test method for the impact depth of roadbed ramming. The fixing system includes a top bearing plate, which is sleeved on a fixed support cylinder; the upper end of the movable support rod is connected with the top bearing plate, which is The lower end extends into the packing layer of the roadbed to be measured; the compression system includes a piston rod, the upper end of the piston rod is connected with the top bearing plate, and the lower end is connected with the piston body, the piston body is arranged in the outer tube of the piston, the measuring liquid is arranged in the outer tube of the piston, and the outer The pipe is provided with a measuring liquid outlet; the measuring and reading system includes a measuring pipe, one end of the measuring pipe is communicated with the measuring liquid outlet; The rising height of the liquid-liquid column is measured intuitively; the relative displacement of the top bearing plate is the porosity reduction of the roadbed packing. When the relative displacement at the measuring point of the roadbed packing is close to zero, it is judged that there is no ramming reinforcement effect. Determination of the depth of impact of ramming.

Figure 201911046168

Description

一种路基夯击影响深度测试装置及测试方法A kind of subgrade tamping impact depth test device and test method

技术领域technical field

本发明属于路基填料施工试验技术领域,具体涉及一种路基夯击影响深度测试装置及测试方法。The invention belongs to the technical field of roadbed filler construction test, and particularly relates to a test device and a test method for the impact depth of roadbed tamping.

背景技术Background technique

近年来,随着高速公路的迅猛发展,人们对车速、平稳、安全与舒适等要求日趋提高,但路基的不均匀沉降导致路面平整度的降低给行车安全与舒适性带来很大影响,尤其是路桥过渡段的不均匀沉降;其中,由于桥台后土体压实不足导致的局部沉降、搭板断裂,进而造成的“桥头跳车”;“桥头跳车”不仅影响车辆的行车舒适度,降低了车辆的使用寿命,更会对行车安全和公路运营构成不同程度的危害;其中,引发这一病害的根本原因主要是路基压实度不足。因而,在夯机加固路基时,确定出填料的有效加固深度,为增加路基压实度的基本参数,针对不同的夯击能,确定出不同填料的有效加固范围,必要之时,确定最优含水率使得有效加固深度达到最大。目前,针对路基填料的有效夯击深度均以经验值为主,施工不确定性较大,路基质量得不到保证。In recent years, with the rapid development of expressways, people's requirements for vehicle speed, stability, safety and comfort are increasing day by day. However, the uneven settlement of the roadbed leads to the reduction of road surface smoothness, which has a great impact on driving safety and comfort, especially It is the uneven settlement of the transition section of the road and bridge; among them, due to the insufficient compaction of the soil behind the abutment, the local settlement and the breakage of the lap plate, which in turn cause the "bridge jumping"; "bridge jumping" not only affects the driving comfort of the vehicle , reduces the service life of the vehicle, and will pose varying degrees of harm to the driving safety and road operation; among them, the root cause of this disease is mainly the insufficient compaction of the roadbed. Therefore, when the tamper reinforces the subgrade, the effective reinforcement depth of the filler is determined. In order to increase the basic parameters of the subgrade compaction, the effective reinforcement range of different fillers is determined according to different ramming energy. When necessary, the optimal reinforcement range is determined. The moisture content maximizes the effective reinforcement depth. At present, the effective ramming depth for subgrade fillers is mainly based on empirical values, the construction uncertainty is large, and the subgrade quality cannot be guaranteed.

发明内容SUMMARY OF THE INVENTION

针对现有技术中的技术问题,本发明提供了一种路基夯击影响深度测试装置及测试方法,以解决现有技术中,采用经验值确定路基夯击深度,施工不确定性较大的技术问题。Aiming at the technical problems in the prior art, the present invention provides a subgrade tamping impact depth testing device and a testing method, so as to solve the problem in the prior art that the empirical value is used to determine the subgrade ramming depth, and the construction uncertainty is relatively large. question.

为解决上述技术问题,本发明通过以下技术方案予以解决:In order to solve the above-mentioned technical problems, the present invention is solved by the following technical solutions:

本发明提供了一种路基夯击影响深度测试装置,包括固定系统、压缩系统及测读系统,压缩系统固定设置在固定系统中,压缩系统与测读系统连接;The invention provides a subgrade ramming impact depth testing device, comprising a fixing system, a compression system and a measuring and reading system, wherein the compression system is fixedly arranged in the fixing system, and the compression system is connected with the measuring and reading system;

固定系统包括顶部承力板、固定支撑筒、活动支撑杆及底部承力板;顶部承力板滑动套设在固定支撑筒的上端,固定支撑筒固定设置在底部承力板上;活动支撑杆的上端与顶部承力板固定连接,活动支撑杆的下端贯穿底部承力板,且伸入待测路基填料层中;The fixing system includes a top bearing plate, a fixed support cylinder, a movable support rod and a bottom bearing plate; the top bearing plate is slidably sleeved on the upper end of the fixed support cylinder, and the fixed support cylinder is fixedly arranged on the bottom bearing plate; the movable support rod The upper end of the movable support rod is fixedly connected to the top bearing plate, and the lower end of the movable support rod penetrates the bottom bearing plate and extends into the subgrade packing layer to be tested;

压缩系统包括活塞杆、活塞体、活塞外管及活塞基座,活塞杆的上端与顶部承力板固定连接;活塞杆的下端与活塞体固定连接,活塞体配合设置在活塞外管内,活塞外管的下端固定设置在活塞基座上;活塞外管内充填有测量液,活塞外管的底部设置有测量液出口;The compression system includes a piston rod, a piston body, a piston outer tube and a piston base. The upper end of the piston rod is fixedly connected to the top bearing plate; the lower end of the piston rod is fixedly connected to the piston body. The lower end of the pipe is fixed on the piston base; the outer pipe of the piston is filled with measuring liquid, and the bottom of the outer pipe of the piston is provided with the measuring liquid outlet;

测读系统包括测量管及刻度尺,测量管的一端与活塞外管底部的测量液出口连通;测量管的另一端与大气连通,且竖向固定设置在刻度尺上,刻度尺竖向设置。The measuring and reading system includes a measuring tube and a scale. One end of the measuring tube is connected to the measuring liquid outlet at the bottom of the outer tube of the piston;

进一步的,还包括应力测量装置,应力测量装置包括压力传感器及应变仪,压力传感器固定设置在顶部承力板上,压力传感器的输出端与应变仪的输入端连接。Further, it also includes a stress measurement device, the stress measurement device includes a pressure sensor and a strain gauge, the pressure sensor is fixed on the top bearing plate, and the output end of the pressure sensor is connected to the input end of the strain gauge.

进一步的,固定支撑筒的侧壁底端设置有测量通孔,测量通孔上设置有测量保护套,测量管穿套在测量保护套内。Further, the bottom end of the side wall of the fixed support cylinder is provided with a measurement through hole, the measurement through hole is provided with a measurement protection sleeve, and the measurement tube is inserted into the measurement protection sleeve.

进一步的,顶部承力板与固定支撑筒之间设置有橡胶垫。Further, a rubber pad is arranged between the top bearing plate and the fixed support cylinder.

进一步的,压缩系统中还包括固定连接杆,固定连接杆竖向设置在活塞基座与底部承力板之间;固定连接杆的上端与活塞基座固定连接,固定连接杆的下端与底部承力板固定连接。Further, the compression system also includes a fixed connecting rod, which is vertically arranged between the piston base and the bottom bearing plate; the upper end of the fixed connecting rod is fixedly connected to the piston base, and the lower end of the fixed connecting rod is connected to the bottom bearing plate. Force plate fixed connection.

进一步的,测读系统还管塞,管塞设置在测量管与大气连通的一端;管塞采用通气式管塞。Further, the measuring and reading system also has a pipe plug, and the pipe plug is arranged at one end of the measuring pipe that communicates with the atmosphere; the pipe plug adopts a ventilated pipe plug.

进一步的,活动支撑杆13的下端设置为圆锥状结构。Further, the lower end of the movable support rod 13 is configured as a conical structure.

进一步的,压力传感器采用电阻式压力传感器,应变采用动态应变仪。Further, the pressure sensor adopts a resistive pressure sensor, and the strain adopts a dynamic strain gauge.

进一步的,测量管包括第一竖直管、水平管及第二竖直管,第一竖直管的一端与活塞外管底部的测量液出口连通,第一竖直管的另一端与水平管的一端连通,水平管穿套在测量管保护套内,水平管的另一端与第二竖直管的下端连通,第二竖直管紧贴固定在刻度尺上。Further, the measuring tube includes a first vertical tube, a horizontal tube and a second vertical tube, one end of the first vertical tube is communicated with the measuring liquid outlet at the bottom of the outer tube of the piston, and the other end of the first vertical tube is connected to the horizontal tube. One end of the horizontal tube is connected to the measuring tube protective sleeve, the other end of the horizontal tube is communicated with the lower end of the second vertical tube, and the second vertical tube is tightly fixed on the scale.

本发明还提供了一种路基夯击影响深度测试方法,利用所述的一种路基夯击影响深度测试装置,包括以下步骤:The present invention also provides a method for testing the impact depth of roadbed ramming, using the device for testing the impact depth of roadbed ramming, including the following steps:

步骤1、将若干个路基夯击影响测试装置埋设在不同高度路基填料层的预设测点处;Step 1. Bury several subgrade ramming impact test devices at preset measuring points of subgrade packing layers of different heights;

步骤2、在路基填料上施加夯击荷载,测读不同高度路基填料层预设测点处的填料相对位移值,绘制深度-填料相对位移曲线;Step 2. Apply a ramming load on the subgrade filler, measure and read the relative displacement value of the filler at the preset measuring points of the subgrade filler layer at different heights, and draw a depth-filler relative displacement curve;

步骤3、根据步骤2中的深度-填料相对位移曲线,得到所述路基夯击影响深度。Step 3: According to the depth-filler relative displacement curve in Step 2, obtain the impact depth of the subgrade ramming.

与现有技术相比,本发明至少具有以下有益效果:Compared with the prior art, the present invention at least has the following beneficial effects:

本发明提供一种路基夯击影响深度测试装置,通过设置固定系统、压缩系统及测读系统,实现了将路基填料层测点处的路基填料的相对位移,通过测读中测量液液柱的上升高度直观测量;路基填料受到夯击荷载时,由于路基填料的孔隙度减小,顶部承力板向下产生位移,顶部承力板的相对位移量即为路基填料的孔隙度减小量,当路基填料测点处的相对位移接近于零时,判定为无加固效果,实现了对夯击影响深度的测定。The invention provides a subgrade tamping impact depth test device. By setting a fixing system, a compression system and a measuring and reading system, the relative displacement of the subgrade packing at the measuring point of the subgrade packing layer is realized, and the relative displacement of the liquid column is measured through the measuring and reading. The rising height is measured intuitively; when the subgrade filler is subjected to ramming load, the top bearing plate is displaced downward due to the decrease in the porosity of the subgrade filler, and the relative displacement of the top bearing plate is the porosity reduction of the subgrade filler, When the relative displacement at the measurement point of the subgrade filling is close to zero, it is determined that there is no reinforcement effect, and the measurement of the impact depth of the tamping impact is realized.

进一步的,通过设置应力测量装置,在夯击荷载作用下,通过监测夯击荷载在路基填料中的传递情况,将路基填料层测点处的夯击荷载应力与填料相对位移对应,得到应力-深度曲线及相对位移-深度曲线,进而得出路基填料有效加固深度值。Further, by setting up a stress measuring device, under the action of the ramming load, by monitoring the transmission of the ramming load in the subgrade filler, the ramming load stress at the measurement point of the subgrade filler layer corresponds to the relative displacement of the filler, and the stress- Depth curve and relative displacement-depth curve, and then obtain the effective reinforcement depth value of subgrade filler.

进一步的,通过设置测量保护套,实现了对测量管的保护,避免填料对测量管的影响,有效提高了测量数据的准确性。Further, by setting the measurement protective sleeve, the protection of the measurement tube is realized, the influence of the filler on the measurement tube is avoided, and the accuracy of the measurement data is effectively improved.

进一步的,通过在顶部承力板与固定支撑筒之间设置橡胶垫,一方面有效避免了路基填料进入固定支撑筒内,另一方面减小了顶部承力板与固定支撑筒之间刚性接触摩擦阻力。Further, by arranging a rubber pad between the top bearing plate and the fixed support cylinder, on the one hand, the roadbed filler is effectively prevented from entering the fixed support cylinder, and on the other hand, the rigid contact between the top bearing plate and the fixed support cylinder is reduced. frictional resistance.

进一步的,通过在活塞基座与底部承力板之间设置固定连接杆,在活塞基座与底部承力板之间形成预留空间,便于测量管的安装。Further, by arranging a fixed connecting rod between the piston base and the bottom bearing plate, a reserved space is formed between the piston base and the bottom bearing plate, which facilitates the installation of the measuring tube.

进一步的,通过在测量管上设置管塞,避免了杂物进入测量管内,对测量数据造成影响。Further, by arranging a pipe plug on the measuring pipe, it is avoided that the sundries enter the measuring pipe and affect the measuring data.

进一步的,通过将活动支撑杆的下端设置为圆锥状结构,通过削尖处理,使其作为刺入端,减小了活动支撑杆的贯入阻力。Further, by setting the lower end of the movable support rod into a conical structure, and by sharpening it, it is used as the piercing end, so that the penetration resistance of the movable support rod is reduced.

本发明还提供了一种路基夯击影响深度测试方法,操作方法简单,同时能直观的获得每次夯击作用下不同深度路基填料的相对位移,进而实现对夯击影响深度的测定,测定结果准确度高。The invention also provides a method for measuring the impact depth of roadbed tamping, which is simple in operation and can intuitively obtain the relative displacement of the roadbed filler at different depths under the action of each tamping impact, so as to realize the measurement of the impact depth of the tamping impact, and the measurement results High accuracy.

附图说明Description of drawings

图1为本发明所述的一种路基夯击影响深度测试装置的整体结构示意图;1 is a schematic diagram of the overall structure of a subgrade ramming impact depth test device according to the present invention;

图2为本发明所述的一种路基夯击影响深度测试装置的A-A处剖视结构示意图;Fig. 2 is the cross-sectional structural schematic diagram of the A-A position of a subgrade ramming impact depth test device according to the present invention;

图3为本发明所述的一种路基夯击影响深度测试装置的B-B处剖视结构示意图;FIG. 3 is a schematic cross-sectional structure diagram of the B-B position of a subgrade ramming impact depth test device according to the present invention;

图4为本发明所述的一种路基夯击影响深度测试装置的使用状态示意图;4 is a schematic diagram of a use state of a subgrade ramming impact depth test device according to the present invention;

图5为本发明所述的一种路基夯击影响深度测试方法中应力曲线图;Fig. 5 is the stress curve diagram in a kind of subgrade tamping influence depth test method according to the present invention;

图6为本发明所述的一种路径夯击影响深度测试方法中相对位移曲线图。FIG. 6 is a relative displacement curve diagram in a method for measuring the depth of impact of path ramming according to the present invention.

其中,1固定系统,2压缩系统,3测读系统,4应力测量装置;11顶部承力板,12固定支撑筒,13活动支撑杆,14底部承力板,15测量管保护套;21活塞杆,22活塞体,23活塞外管,24活塞基座,25固定连接杆,26活塞杆端板;31测量管,32刻度尺,33尺座,34管塞;311第一竖直管,312水平管,313第二竖直管。Among them, 1 fixing system, 2 compression system, 3 reading system, 4 stress measuring device; 11 top bearing plate, 12 fixed support cylinder, 13 movable support rod, 14 bottom bearing plate, 15 measuring tube protective sleeve; 21 piston Rod, 22 piston body, 23 piston outer tube, 24 piston base, 25 fixed connecting rod, 26 piston rod end plate; 31 measuring tube, 32 scale, 33 foot seat, 34 tube plug; 311 first vertical tube, 312 horizontal pipe, 313 second vertical pipe.

具体实施方式Detailed ways

为使本发明实施例的目的、技术方案和优点更加清楚,下面将结合附图对本发明的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

如附图1-4所示,本发明提供了一种路基夯击影响深度测试装置,包括固定系统1、压缩系统2、测读系统3及应力测量装置4;固定系统1用于固定安装压缩系统2,压缩系统2设置在固定系统1中,压缩系统2的上下两端分别与固定系统1的上下两端固定连接;测读系统3与压缩系统2连接;应力测量装置4设置在固定系统1上,应力测量装置4用于测量夯击荷载在路基填料层测点深度处的动力响应。As shown in Figures 1-4, the present invention provides a subgrade ramming impact depth test device, including a fixing system 1, a compression system 2, a measuring and reading system 3 and a stress measuring device 4; the fixing system 1 is used for fixed installation compression System 2, the compression system 2 is set in the fixing system 1, the upper and lower ends of the compression system 2 are fixedly connected with the upper and lower ends of the fixing system 1 respectively; the reading system 3 is connected with the compression system 2; the stress measuring device 4 is set in the fixing system. 1, the stress measuring device 4 is used to measure the dynamic response of the ramming load at the depth of the measuring point of the subgrade filling layer.

固定系统1包括顶部承力板11、固定支撑筒12、活动支撑杆13、底部承力板14及测量保护套15;顶部承力板11水平套设在固定支撑筒12的上端,顶部承力板11与固定承力板11与固定支撑筒12滑动连接,顶部承力板11用于承受夯击荷载;固定支撑筒12竖向固定设置在底部承力板12的上端,底部承力板14水平设置;活动支撑杆13的上端与顶部承力板11固定连接,活动支撑杆13的下端贯穿底部承力板12,且伸入路基填料层中;活动支撑杆13与底部承力板14活动连接;固定支撑筒12的侧壁底端设置有测量通孔,测量保护套15与测量通孔连接,测读系统3的一端穿套在测量保护套15中,并与压缩系统2连接。The fixing system 1 includes a top bearing plate 11, a fixed support cylinder 12, a movable support rod 13, a bottom bearing plate 14 and a measuring protective sleeve 15; the top bearing plate 11 is horizontally sleeved on the upper end of the fixed support cylinder 12, and the top bears the force. The plate 11 is slidably connected with the fixed bearing plate 11 and the fixed support cylinder 12, the top bearing plate 11 is used to bear the ramming load; the fixed support cylinder 12 is vertically fixed on the upper end of the bottom bearing plate 12, and the bottom bearing plate 14 Set horizontally; the upper end of the movable support rod 13 is fixedly connected with the top bearing plate 11 , the lower end of the movable support rod 13 penetrates the bottom bearing plate 12 and extends into the subgrade packing layer; the movable support rod 13 is movable with the bottom bearing plate 14 Connection; the bottom end of the side wall of the fixed support cylinder 12 is provided with a measurement through hole, the measurement protection sleeve 15 is connected with the measurement through hole, and one end of the measurement and reading system 3 is sheathed in the measurement protection sleeve 15 and connected with the compression system 2 .

压缩系统2的上端与顶部承力板11固定连接,压缩系统2的下端与底部承力板14固定连接;压缩系统2包括活塞杆21、活塞体22、活塞外管23、活塞基座24、固定连接杆25及活塞杆端板26,活塞杆21的上端与顶部承力板11的下表面固定连接;活塞杆端板26设置在活塞杆21与顶部承力板11之间,活塞杆端板26的上表面与顶部承力板11的下表面固定连接,活塞杆端板26的下表面与活塞杆21的上端固定连接,通过在顶部承力板11与活塞杆21之间设置活塞杆端板26,确保了活塞杆21与顶部承力板11之间的稳定连接;活塞杆21的下端与活塞体22固定连接,活塞体22配合设置在活塞外管23内,活塞外管23的下端固定设置在活塞基座24上;活塞外管23内充填有测量液,活塞外管23的底部设置有测量液出口,测量液出口用于与测读系统3连接;顶部承力板11承受夯击荷载时,在夯击荷载的作用下,路基填料层被压实,此时顶部承力板11产生向下位移,带动活塞杆21向下移动,活塞杆21带动活塞体22压缩活塞外管23内的测量液进入测读系统3中,通过测量测量液进入测读系统3的高度,实现了对夯击荷载作用下,顶部承力板11的上下移动位移差,进而实现对路基填料层压实情况的测定;固定连接杆25竖向设置在活塞基座24的底部,固定连接杆25的上端与活塞基座24的底部固定连接,固定连接杆25的下端与底部承力板14的上表面固定连接。The upper end of the compression system 2 is fixedly connected to the top bearing plate 11, and the lower end of the compression system 2 is fixedly connected to the bottom bearing plate 14; the compression system 2 includes a piston rod 21, a piston body 22, a piston outer tube 23, a piston base 24, The connecting rod 25 and the piston rod end plate 26 are fixed, and the upper end of the piston rod 21 is fixedly connected with the lower surface of the top bearing plate 11; the piston rod end plate 26 is arranged between the piston rod 21 and the top bearing plate 11, and the piston rod end The upper surface of the plate 26 is fixedly connected with the lower surface of the top bearing plate 11 , and the lower surface of the piston rod end plate 26 is fixedly connected with the upper end of the piston rod 21 , by arranging the piston rod between the top bearing plate 11 and the piston rod 21 The end plate 26 ensures the stable connection between the piston rod 21 and the top bearing plate 11; the lower end of the piston rod 21 is fixedly connected with the piston body 22, the piston body 22 is arranged in the piston outer tube 23, and the The lower end is fixedly arranged on the piston base 24; the piston outer tube 23 is filled with measuring liquid, the bottom of the piston outer tube 23 is provided with a measuring liquid outlet, and the measuring liquid outlet is used to connect with the measuring and reading system 3; the top bearing plate 11 bears the During the ramming load, under the action of the ramming load, the subgrade packing layer is compacted. At this time, the top bearing plate 11 is displaced downward, which drives the piston rod 21 to move downward, and the piston rod 21 drives the piston body 22 to compress the outside of the piston. The measuring liquid in the pipe 23 enters the measuring and reading system 3, and by measuring the height of the measuring liquid entering the measuring and reading system 3, the displacement difference between the up and down movement of the top bearing plate 11 under the action of the ramming load is realized, thereby realizing the filling of the roadbed. Determination of layer compaction; the fixed connecting rod 25 is vertically arranged at the bottom of the piston base 24, the upper end of the fixed connecting rod 25 is fixedly connected with the bottom of the piston base 24, and the lower end of the fixed connecting rod 25 is connected with the bottom bearing plate 14 the upper surface of the fixed connection.

测读系统3包括测量管31、刻度尺32、尺座33及管塞34,测量管31采用U型管;测量管31包括第一竖直管311、水平管312及第二竖直管313,第一竖直管311的一端与活塞外管23底部的测量液出口连通,第一竖直管311的另一端与水平管312的一端连通,水平管312穿套在测量管保护套15内,水平管312的另一端与第二竖直管313的下端连通,管塞34设置在第二竖直管313的上端,管塞34采用通气式管塞,确保测量管31与大气连通,同时避免了杂物进入测量管31内;刻度尺32竖向设置在尺座33上,第二竖直管313与刻度尺32竖向平行设置,且紧贴固定在刻度尺32上,通过刻度尺32上的刻度值能够读出第二竖直管313内测量液的升降高度;刻度尺32的顶端设置有水准泡,用于调节刻度尺32处于竖直状态。The measuring and reading system 3 includes a measuring tube 31 , a scale 32 , a ruler base 33 and a tube plug 34 . The measuring tube 31 adopts a U-shaped tube; the measuring tube 31 includes a first vertical tube 311 , a horizontal tube 312 and a second vertical tube 313 , one end of the first vertical pipe 311 is communicated with the measuring liquid outlet at the bottom of the piston outer pipe 23, the other end of the first vertical pipe 311 is communicated with one end of the horizontal pipe 312, and the horizontal pipe 312 is sheathed in the protective sleeve 15 of the measuring pipe , the other end of the horizontal pipe 312 is communicated with the lower end of the second vertical pipe 313, the pipe plug 34 is arranged on the upper end of the second vertical pipe 313, and the pipe plug 34 adopts a vented pipe plug to ensure that the measuring pipe 31 is communicated with the atmosphere, and at the same time Prevent debris from entering the measuring tube 31; the scale 32 is vertically arranged on the ruler base 33, and the second vertical tube 313 is arranged vertically parallel to the scale 32, and is tightly fixed on the scale 32, through the scale The scale value on 32 can read the lifting height of the measuring liquid in the second vertical pipe 313; the top of the scale 32 is provided with a level bubble, which is used to adjust the scale 32 to be in a vertical state.

应力测量装置4包括压力传感器及应变仪,压力传感器固定设置在顶部承力板11上,压力传感器的输出端与应变仪的输入端连接,压力传感器用于测量夯击荷载在测点深度处的动力响应。The stress measuring device 4 includes a pressure sensor and a strain gauge. The pressure sensor is fixed on the top bearing plate 11. The output end of the pressure sensor is connected to the input end of the strain gauge. The pressure sensor is used to measure the ramming load at the depth of the measuring point. Dynamic response.

工作原理及使用方法How it works and how to use it

如附图5-6所示,本发明所述的一种路基夯击影响深度测试装置,组装时,首先,将活塞体22与活塞杆21的下端紧扣连接,通过活塞杆端板26将活塞杆21固定设置在顶部承力板11上,活塞杆21与活塞体22组装形成活塞主杆;将活塞主杆压入活塞外管23内,将活塞外管23的下端与活塞基座24固定连接,构成压缩系统2;然后,通过固定系统1将压缩系统2进行固定;最后,将测量管31的一端与活塞外管23底部测量液出口连通,测量管31的另一端通过固定支撑筒12侧壁上的测量通孔引出,并将测量管31的另一端固定在刻度尺32上;在顶部承力板11的上表面固定安装压力传感器,并将压力传感器的输出端与应力仪的输入端连接。As shown in Figures 5-6, when assembling the device for testing the impact depth of roadbed ramming according to the present invention, firstly, the piston body 22 is tightly connected with the lower end of the piston rod 21, and the piston rod end plate 26 is used to connect the The piston rod 21 is fixed on the top bearing plate 11, and the piston rod 21 and the piston body 22 are assembled to form the main piston rod; the main piston rod is pressed into the piston outer tube 23, and the lower end of the piston outer tube 23 is connected with the piston base 24. Then, the compression system 2 is fixed by the fixing system 1; finally, one end of the measuring tube 31 is communicated with the measuring liquid outlet at the bottom of the piston outer tube 23, and the other end of the measuring tube 31 passes through the fixed support cylinder 12 The measuring through hole on the side wall is drawn out, and the other end of the measuring tube 31 is fixed on the scale 32; the pressure sensor is fixedly installed on the upper surface of the top bearing plate 11, and the output end of the pressure sensor is connected with the strain gauge. input connection.

测量时,首先,将本发明所述的测量装置埋设在路基填料层的预设测点处;然后对活塞外管23内的测量液在测量管31中进行标定,标定时,在顶部承力板11的顶部施加预定荷载,使活塞杆21向下移动ΔH,测量此时测量管31的第二竖直管中测量液液柱上升高度为Δh,进而获得标定参数K;标定参数K的表达式为:When measuring, first, the measuring device of the present invention is embedded in the preset measuring point of the roadbed packing layer; then the measuring liquid in the piston outer pipe 23 is calibrated in the measuring pipe 31, and during the calibration, the top bears the force. A predetermined load is applied to the top of the plate 11 to move the piston rod 21 downward by ΔH, and the rising height of the liquid column in the second vertical pipe of the measuring tube 31 is measured as Δh, and then the calibration parameter K is obtained; the expression of the calibration parameter K The formula is:

Figure BDA0002254198090000071
Figure BDA0002254198090000071

其中,ΔH为活塞杆下降值;Δh为测量管液柱上升值;K为标定参数;Among them, ΔH is the descending value of the piston rod; Δh is the rising value of the liquid column of the measuring tube; K is the calibration parameter;

然后,在顶部承力板11上施加夯击荷载,根据路基填料加固机理,提高路基填料压实度的本质主要是减小填料的孔隙度;在夯击荷载作用下,由于活动支撑杆13在路基填料中的移动,带动顶部承力板11向下移动;顶部承力板11向下移动时,通过活塞杆21带动活塞体22压缩活塞外管23内的测量液,测量液被压缩后,经活塞外管23底部的测量液出口进入测量管31的第一竖直管内,并经水平管,进入第二竖直管内,第二竖直管内的测量液液面上升;通过刻度尺32上的刻度测量得到测量液在测量管31内的上升高度,实现对顶部承力板11的下降高度的测量,进而获得了该夯击荷载作用下,路基填料的相对位移值,通过在不同高度的路基填料层测点处设置本发明所述的测量装置,得到路基填料的相对位移-深度曲线;Then, a ramming load is applied on the top bearing plate 11. According to the reinforcement mechanism of the roadbed filler, the essence of improving the compaction of the roadbed filler is to reduce the porosity of the filler; The movement in the subgrade packing drives the top bearing plate 11 to move downward; when the top bearing plate 11 moves downward, the piston body 22 is driven by the piston rod 21 to compress the measuring fluid in the piston outer tube 23. After the measuring fluid is compressed, It enters the first vertical pipe of the measuring pipe 31 through the measuring liquid outlet at the bottom of the outer pipe 23 of the piston, and enters the second vertical pipe through the horizontal pipe, and the liquid level of the measuring liquid in the second vertical pipe rises; Scale measurement to obtain the rising height of the measuring liquid in the measuring tube 31, realize the measurement of the falling height of the top bearing plate 11, and then obtain the relative displacement value of the roadbed filler under the action of the ramming load. The measuring device of the present invention is arranged at the measuring point of the roadbed packing layer to obtain the relative displacement-depth curve of the roadbed packing;

夯击荷载作用下,任一路基填料层测点处的路基填料的相对位移值,如下公式得出:Under the action of the ramming load, the relative displacement value of the subgrade filler at the measurement point of any subgrade filler layer is obtained by the following formula:

ΔHi=KΔH i =K

式中:ΔHi为路基填料层中第i填料层测点相对位移值;In the formula: ΔH i is the relative displacement value of the measuring point of the i-th packing layer in the subgrade packing layer;

h1为未夯击前测量液液柱读数;h 1 is the reading of the liquid column measured before tamping;

h2为夯击之后测量液液柱读数;h 2 is the liquid column reading after tamping;

K为标定参数;K is the calibration parameter;

利用测读系统,得到不同高度处,测试装置中测量液液柱的上升高度值,根据测量液液柱的上升高度,得到填料的相对位移值,绘制深度-填料相对位移曲线;当深度-填料相对位移曲线的趋近水平时,对应路基填料层测点处路基填料的相对位移接近于零时,可判定夯击荷载无加固效果,由此可确定处有效加固深度。Use the measuring and reading system to obtain the rising height value of the liquid column measured in the test device at different heights. According to the rising height of the measured liquid column, the relative displacement value of the packing is obtained, and the depth-packing relative displacement curve is drawn; when the depth-packing When the relative displacement curve approaches the level, when the relative displacement of the subgrade filler at the measurement point of the corresponding subgrade filler layer is close to zero, it can be determined that the ramming load has no reinforcement effect, and thus the effective reinforcement depth can be determined.

通过设置应力测量装置4,在夯击荷载作用下,通过监测冲击荷载在路基填料中的传递情况以及直观的位移变化,进而分析出不同填料在不同夯击能条件下的加固深度;将压力传感器布设在顶部承力板11的上表面,将路基填料层测点应力与路基填料的相对位移对应起来,利用应变仪连接压力传感器,测出夯击荷载在测点深度出的动力响应,通过测量路基填料层测点处夯击荷载沿深度的填料相对变化量,得到应力曲线;通过实测填料重度,理论计算出自重应力曲线,根据土力学理论,只有当附加应力大于自重应力时,附加应力才会对土体有加固效果。因此,依据附加应力曲线与自重应力曲线交点和夯击相对位移曲线稳定点,确定出路基填料有效加固深度值。By setting the stress measuring device 4, under the action of the ramming load, by monitoring the transmission of the impact load in the subgrade filler and the intuitive displacement change, the reinforcement depth of different fillers under different ramming energy conditions can be analyzed; It is arranged on the upper surface of the top bearing plate 11, and the stress at the measuring point of the subgrade packing layer is corresponding to the relative displacement of the subgrade packing. The strain gauge is used to connect the pressure sensor, and the dynamic response of the ramming load at the depth of the measuring point is measured. The stress curve is obtained by the relative change of the filling along the depth of the tamping load at the measuring point of the subgrade filling layer; the self-weight stress curve is theoretically calculated by measuring the weight of the filler. According to the theory of soil mechanics, the additional stress is only when the additional stress is greater than the self-weight stress It will strengthen the soil. Therefore, according to the intersection of the additional stress curve and the self-weight stress curve and the stable point of the relative displacement curve of the ramming impact, the effective reinforcement depth value of the subgrade filler is determined.

实施例Example

本发明所述的一种路基夯击影响深度测试装置,包括固定系统1、压缩系统2、测读系统3及应力测量装置4;压缩系统2采用活塞管组合,压缩系统2通过固定系统1固定;压缩系统2内充填测量液,测量液采用水或油;压缩系统2与测读系统3连接,固定系统1受到夯击荷载时,固定系统1带动压缩系统2中的活塞体22产生位移,活塞杆通过带动活塞体22压缩测量液进入测读系统3中,通过对测量液在测读系统3中的上升高度,得到固定系统1的相对位移,进而得到路基填料的相对位移,实现了对测点填料的压实度的测定,进而获得的夯击荷载的压实深度。The device for testing the impact depth of roadbed ramming according to the present invention includes a fixing system 1 , a compression system 2 , a measuring and reading system 3 and a stress measuring device 4 ; ; The compression system 2 is filled with measuring liquid, and the measuring liquid adopts water or oil; the compression system 2 is connected with the measuring and reading system 3, and when the fixing system 1 is subjected to a ramming load, the fixing system 1 drives the piston body 22 in the compression system 2 to produce displacement, The piston rod drives the piston body 22 to compress the measuring liquid into the measuring and reading system 3, and obtains the relative displacement of the fixing system 1 by measuring the rising height of the measuring liquid in the measuring and reading system 3, and then obtains the relative displacement of the roadbed filler, which realizes Determination of the compaction degree of the measuring point filler, and then the compaction depth of the tamping load obtained.

固定系统1包括顶部承力板11、固定支撑筒12、两根活动支撑杆13、底部承力板14及测量保护套15;顶部承力板11水平套设在固定支撑筒12的上端,顶部承力板11与固定承力板11与固定支撑筒12滑动连接,顶部承力板11用于承受夯击荷载;顶部承力板11与固定支撑筒12之间设置有橡胶垫,一方面有效避免了路基填料进入固定支撑筒12内,另一方面减小了顶部承力板11与固定支撑筒12之间刚性接触摩擦阻力。The fixing system 1 includes a top bearing plate 11, a fixed support cylinder 12, two movable support rods 13, a bottom bearing plate 14 and a measuring protective sleeve 15; the top bearing plate 11 is horizontally sleeved on the upper end of the fixed support cylinder 12, and the top The bearing plate 11 is slidably connected with the fixed bearing plate 11 and the fixed support cylinder 12, and the top bearing plate 11 is used to bear the ramming load; a rubber pad is arranged between the top bearing plate 11 and the fixed support cylinder 12, which is effective on the one hand. The roadbed filler is prevented from entering the fixed support cylinder 12 , and on the other hand, the rigid contact frictional resistance between the top bearing plate 11 and the fixed support cylinder 12 is reduced.

固定支撑筒12竖向固定设置在底部承力板12的上端,底部承力板12水平设置;两根活动支撑杆13对称设置在压缩系统2的两侧;活动支撑杆13的上端与顶部承力板11固定连接,活动支撑杆13的下端贯穿底部承力板12后,插入路基填料层中;活动支撑杆13的下端设置为圆锥状结构,通过削尖处理,作为刺入端插入路基填料层中,减小了活动支撑杆13的插入阻力;活动支撑杆13与底部承力板14活动连接;固定支撑筒12的侧壁底端设置有测量通孔,测量保护套15的一端与测量通孔连接,测量管31的一端贯穿测量保护套15,并与压缩系统2连接;通过设置测量保护套15,有效防止了路基填料损坏测量管31,避免了测量数据的错误;测量保护套15采用铁管或不锈钢伸缩软管;由于实际施工要求,测量管31往往长度较长,为了操作方便,测量保护套15采用分节连接或弯曲设置;当接近夯击平面时,由于夯击动荷载较大,测量保护套15采用铁管,避免了对测量数据产生影响。The fixed support cylinder 12 is vertically fixed on the upper end of the bottom bearing plate 12, and the bottom bearing plate 12 is arranged horizontally; the two movable support rods 13 are symmetrically arranged on both sides of the compression system 2; the upper end of the movable support rod 13 and the top bearing The force plate 11 is fixedly connected, and the lower end of the movable support rod 13 penetrates through the bottom bearing plate 12 and is inserted into the subgrade filler layer; the lower end of the movable support rod 13 is set to a conical structure, which is sharpened and inserted into the subgrade filler as the piercing end In the layer, the insertion resistance of the movable support rod 13 is reduced; the movable support rod 13 is movably connected with the bottom bearing plate 14; the bottom end of the side wall of the fixed support cylinder 12 is provided with a measurement through hole, and one end of the measurement protective sleeve 15 is connected with the measurement Through hole connection, one end of the measuring tube 31 penetrates the measuring protective sleeve 15 and is connected to the compression system 2; by setting the measuring protective sleeve 15, the roadbed packing is effectively prevented from damaging the measuring tube 31, and the error of the measurement data is avoided; the measuring protective sleeve 15 Iron pipes or stainless steel telescopic hoses are used; due to the actual construction requirements, the measuring pipe 31 is often long in length. For the convenience of operation, the measuring protective sleeve 15 is connected by sections or bent; It is larger, and the measuring protective sleeve 15 is made of iron pipe, which avoids any influence on the measuring data.

压缩系统2包括活塞杆21、活塞体22、活塞外管23、活塞基座24、四根固定连接杆25及活塞杆端板26,活塞杆21的上端与顶部承力板11的下表面固定连接;活塞杆端板26设置在活塞杆21与顶部承力板11之间,活塞杆端板26的上表面与顶部承力板11的下表面固定连接,活塞杆端板26的下表面与活塞杆21的上端固定连接;活塞杆21的下端与活塞体22固定连接,活塞体22配合设置在活塞外管23内,活塞外管23的下端固定设置在活塞基座24上,活塞基座24上设置有贯穿通孔,活塞基座24上的贯穿通孔与活塞外管23上的测量液出口的位置相适应,便于测量管31穿过活塞基座24后与活塞外管23上的测量液出口连通;活塞外管23内充填有测量液,测量液采用水或油;活塞外管23的底部设置有测量液出口,测读系统3的一端与活塞外管23底部的测量液出口连通;顶部承力板11承受夯击荷载时,驱动顶部承力板11向下移动,顶部承力板11带动活塞杆21向下移动,带动活塞体22压缩活塞外管23内的测量液进入测读系统3中,通过测量进入测读系统3的测量液液柱的上升高度,实现了对夯击荷载作用下,顶部承力板11的上下移动位移差,进而实现了对路基填料压实过程中的相对位移的测量;四根固定连接杆25竖向对称设置在活塞基座23的底部,固定连接杆25的上端与活塞基座23的底部固定连接,固定连接杆25的下端与底部承力板14的上表面固定连接;通过在活塞基座23与底部承力板14之间设置固定连接杆25,在活塞基座23与底部承力板14之间形成预留空间,便于测量管31的安装。The compression system 2 includes a piston rod 21, a piston body 22, a piston outer tube 23, a piston base 24, four fixed connecting rods 25 and a piston rod end plate 26. The upper end of the piston rod 21 is fixed to the lower surface of the top bearing plate 11 Connection; the piston rod end plate 26 is arranged between the piston rod 21 and the top bearing plate 11, the upper surface of the piston rod end plate 26 is fixedly connected with the lower surface of the top bearing plate 11, and the lower surface of the piston rod end plate 26 is connected to the top bearing plate 11. The upper end of the piston rod 21 is fixedly connected; the lower end of the piston rod 21 is fixedly connected with the piston body 22, the piston body 22 is arranged in the piston outer tube 23, the lower end of the piston outer tube 23 is fixedly arranged on the piston base 24, and the piston base 24 is provided with a through hole, and the through hole on the piston base 24 is adapted to the position of the measuring liquid outlet on the piston outer tube 23, so that the measuring tube 31 passes through the piston base 24 and is connected to the piston outer tube 23. The measuring liquid outlet is connected; the piston outer pipe 23 is filled with measuring liquid, and the measuring liquid adopts water or oil; the bottom of the piston outer pipe 23 is provided with a measuring liquid outlet, and one end of the measuring and reading system 3 is connected with the measuring liquid outlet at the bottom of the piston outer pipe 23 When the top bearing plate 11 bears the ramming load, it drives the top bearing plate 11 to move downward, the top bearing plate 11 drives the piston rod 21 to move downward, and drives the piston body 22 to compress the measuring liquid in the piston outer tube 23 into the In the measuring and reading system 3, by measuring the rising height of the measuring liquid column entering the measuring and reading system 3, the up and down displacement difference of the top bearing plate 11 under the action of the ramming load is realized, thereby realizing the compaction of the roadbed packing. Measurement of relative displacement in the process; four fixed connecting rods 25 are vertically symmetrically arranged at the bottom of the piston base 23, the upper end of the fixed connecting rod 25 is fixedly connected with the bottom of the piston base 23, and the lower end of the fixed connecting rod 25 is connected to the bottom The upper surface of the bearing plate 14 is fixedly connected; by setting a fixed connecting rod 25 between the piston base 23 and the bottom bearing plate 14, a reserved space is formed between the piston base 23 and the bottom bearing plate 14, which is convenient for measurement Installation of pipe 31.

测读系统3包括测量管31、刻度尺32、尺座33及管塞34,测量管31采用U型管;测量管31包括第一竖直管311、水平管312及第二竖直管313,第一竖直管311的一端与活塞外管23底部的测量液出口连通,第一竖直管311的另一端与水平管312的一端连通,水平管312穿套在测量管保护套15内,水平管312的另一端与第二竖直管313的下端连通,管塞34设置在第二竖直管313的上端;管塞34采用通气式管塞,确保测量管31的压强与大气连通,同时避免了杂物进入测量管31内;刻度尺32竖向设置在尺座33上,第二竖直管313与刻度尺32竖向平行设置,且紧贴固定在刻度尺32上,通过刻度尺32上的刻度值能够读出第二竖直管313内测量液的升降高度;刻度尺32的顶端设置有水准泡,用于调节刻度尺32处于竖直状态;刻度尺32的刻度精度为0.1mm,尺座33采用钢板制作;优选的,采用拉索将刻度尺32与尺座33固定连接。为了方便测量管31的读数,对同一路基位置,不同填料层测点处的测量装置进行标号,并将每一层的测量管31均固定在同一刻度尺32上。The measuring and reading system 3 includes a measuring tube 31 , a scale 32 , a ruler base 33 and a tube plug 34 . The measuring tube 31 adopts a U-shaped tube; the measuring tube 31 includes a first vertical tube 311 , a horizontal tube 312 and a second vertical tube 313 , one end of the first vertical pipe 311 is communicated with the measuring liquid outlet at the bottom of the piston outer pipe 23, the other end of the first vertical pipe 311 is communicated with one end of the horizontal pipe 312, and the horizontal pipe 312 is sheathed in the protective sleeve 15 of the measuring pipe , the other end of the horizontal pipe 312 is communicated with the lower end of the second vertical pipe 313, and the pipe plug 34 is arranged on the upper end of the second vertical pipe 313; At the same time, the sundries are prevented from entering the measuring tube 31; the scale 32 is vertically arranged on the ruler base 33, and the second vertical tube 313 is arranged vertically parallel to the scale 32, and is closely fixed on the scale 32, through The scale value on the scale 32 can read the lifting height of the measuring liquid in the second vertical pipe 313; the top of the scale 32 is provided with a level bubble, which is used to adjust the scale 32 to be in a vertical state; the scale accuracy of the scale 32 It is 0.1mm, and the ruler base 33 is made of steel plate; preferably, the ruler 32 and the ruler base 33 are fixedly connected by a cable. In order to facilitate the reading of the measuring tubes 31 , the measuring devices at the same roadbed position and the measuring points of different packing layers are marked, and the measuring tubes 31 of each layer are fixed on the same scale 32 .

应力测量装置4包括压力传感器及应变仪,压力传感器固定设置在顶部承力板11上,压力传感器的输出端与应变仪的输入端连接,压力传感器用于测量夯击荷载在测点深度处的动力响应。压力传感器采用电阻式压力传感器,应变仪采用动态应变仪。The stress measuring device 4 includes a pressure sensor and a strain gauge. The pressure sensor is fixed on the top bearing plate 11. The output end of the pressure sensor is connected to the input end of the strain gauge. The pressure sensor is used to measure the ramming load at the depth of the measuring point. Dynamic response. The pressure sensor adopts a resistive pressure sensor, and the strain gauge adopts a dynamic strain gauge.

本发明还提供了一种路基夯击影响深度测试方法,包括以下步骤:The present invention also provides a method for testing the impact depth of roadbed ramming, comprising the following steps:

步骤1、将若干个路基夯击影响测试装置埋设在不同高度路基填料层的预设测点处;Step 1. Bury several subgrade ramming impact test devices at preset measuring points of subgrade packing layers of different heights;

步骤2、在路基填料上施加夯击荷载,测读不同高度路基填料层预设测点处的填料相对位移值,绘制深度-填料相对位移曲线;具体的,利用测读系统,得到不同高度处,测试装置中测量液液柱的上升高度值,根据测量液液柱的上升高度,得到填料的相对位移值,绘制深度-填料相对位移曲线;Step 2. Apply a ramming load on the subgrade filler, measure and read the relative displacement value of the filler at the preset measuring points of the subgrade filler layer at different heights, and draw a depth-filler relative displacement curve; specifically, use the measurement and reading system to obtain the position at different heights. , the rising height value of the liquid column is measured in the test device, and the relative displacement value of the packing is obtained according to the rising height of the measured liquid column, and the depth-packing relative displacement curve is drawn;

步骤3、利用应力测量装置,测读不同高度路基填料层预设测点处的夯击荷载的动力响应,绘制深度-应力曲线;Step 3. Using the stress measuring device, measure and read the dynamic response of the ramming load at the preset measuring points of the subgrade filling layer of different heights, and draw a depth-stress curve;

步骤4、根据步骤2的深度-填料相对位移曲线,当深度-填料相对位移曲线的趋近水平时,对应的深度值即为路基夯击影响深度;Step 4. According to the depth-filler relative displacement curve in step 2, when the depth-filler relative displacement curve approaches the level, the corresponding depth value is the impact depth of roadbed ramming;

或根据步骤3中的深度-应力曲线,通过室内试验,得出路基填料天然重度γ,依据公式σz=γz,其中,σz为z深度出的自重应力值,z为深度值;确定出自重应力曲线,结合实测深度-应力曲线,自重应力曲线与深度-应力曲线的交点对应深度值为所述路基夯击影响深度。Or according to the depth-stress curve in step 3, through the indoor test, the natural weight γ of the roadbed filler can be obtained, according to the formula σ z =γz, where σ z is the self-weight stress value from the z depth, and z is the depth value; The self-weight stress curve, combined with the measured depth-stress curve, the corresponding depth value of the intersection of the self-weight stress curve and the depth-stress curve is the impact depth of the subgrade ramming.

本发明所述的一种路基夯击影响深度测量装置,基于现场试验确定出路基填料实际加固深度,通过在路基填料层测点处设置路基夯击影响深度测量装置,埋设电阻式压力盒和位移监测装置,确定出夯击荷载在填料中的竖向传递效果,从而换算出有效加固深度,进一步确定出夯击工艺参数,以达到合理施工、加快工期的目的。The device for measuring the impact depth of roadbed tamping according to the present invention determines the actual reinforcement depth of the roadbed filler based on the field test. The monitoring device determines the vertical transmission effect of the ramming load in the filler, thereby converting the effective reinforcement depth, and further determining the ramming process parameters, so as to achieve the purpose of reasonable construction and speeding up the construction period.

以上所述实施例,仅为本发明的具体实施方式,用以说明本发明的技术方案,而非对其限制,本发明的保护范围并不局限于此,尽管参照前述实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,其依然可以对前述实施例所记载的技术方案进行修改或可轻易想到变化,或者对其中部分技术特征进行等同替换;而这些修改、变化或者替换,并不使相应技术方案的本质脱离本发明实施例技术方案的精神和范围,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应所述以权利要求的保护范围为准。The above-mentioned embodiments are only specific implementations of the present invention, and are used to illustrate the technical solutions of the present invention, but not to limit them. Detailed description, those of ordinary skill in the art should understand: any person skilled in the art is within the technical scope disclosed by the present invention, and it can still modify the technical solutions recorded in the foregoing embodiments or can easily think of changes, Or equivalently replace some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. A testing device for roadbed ramming influence depth is characterized by comprising a fixing system (1), a compression system (2) and a measuring and reading system (3), wherein the compression system (2) is fixedly arranged in the fixing system (1), and the compression system (2) is connected with the measuring and reading system (3);
the fixing system (1) comprises a top bearing plate (11), a fixed supporting cylinder (12), a movable supporting rod (13) and a bottom bearing plate (14); the top bearing plate (11) is sleeved at the upper end of the fixed supporting cylinder (12) in a sliding manner, and the fixed supporting cylinder (12) is fixedly arranged on the bottom bearing plate (12); the upper end of the movable supporting rod (13) is fixedly connected with the top bearing plate (11), and the lower end of the movable supporting rod (13) penetrates through the bottom bearing plate (12) and extends into the roadbed packing layer to be detected;
the compression system (2) comprises a piston rod (21), a piston body (22), a piston outer tube (23) and a piston base (24), and the upper end of the piston rod (21) is fixedly connected with the top bearing plate (11); the lower end of the piston rod (21) is fixedly connected with the piston body (22), the piston body (22) is arranged in the piston outer tube (23) in a matching way, and the lower end of the piston outer tube (23) is fixedly arranged on the piston base (24); the piston outer tube (23) is filled with measuring liquid, and the bottom of the piston outer tube (23) is provided with a measuring liquid outlet;
the measuring and reading system (3) comprises a measuring tube (31) and a graduated scale (32), wherein one end of the measuring tube (31) is communicated with a measuring liquid outlet at the bottom of the piston outer tube (23); the other end of measuring pipe (31) and atmosphere intercommunication, and vertical fixed the setting on scale (32), the vertical setting of scale (32).
2. The roadbed ramming influence depth testing device according to claim 1, characterized by further comprising a stress measuring device (4), wherein the stress measuring device (4) comprises a pressure sensor and a strain gauge, the pressure sensor is fixedly arranged on the top bearing plate (11), and an output end of the pressure sensor is connected with an input end of the strain gauge.
3. The roadbed ramming influence depth testing device is characterized in that the bottom end of the side wall of the fixed supporting cylinder (12) is provided with a measuring through hole, a measuring protective sleeve (15) is arranged on the measuring through hole, and the measuring pipe (31) is sleeved in the measuring protective sleeve (15).
4. The roadbed ramming influence depth testing device is characterized in that a rubber pad is arranged between the top bearing plate (11) and the fixed support cylinder (12).
5. The roadbed ramming influence depth testing device according to claim 1, wherein the compression system (2) further comprises a fixed connecting rod (25), and the fixed connecting rod (25) is vertically arranged between the piston base (24) and the bottom bearing plate (14); the upper end of the fixed connecting rod (25) is fixedly connected with the piston base (24), and the lower end of the fixed connecting rod (25) is fixedly connected with the bottom bearing plate (14).
6. The roadbed ramming influence depth testing device is characterized in that the measuring and reading system (3) further comprises a pipe plug (34), the pipe plug (34) is arranged at one end of the measuring pipe (31) communicated with the atmosphere; the pipe plug (34) adopts a ventilation type pipe plug.
7. The roadbed ramming influence depth testing device is characterized in that the lower end of the movable support rod 13 is in a conical structure.
8. The roadbed ramming influence depth testing device according to claim 2, wherein the pressure sensor is a resistance type pressure sensor, and the strain is a dynamic strain gauge.
9. The roadbed ramming influence depth testing device is characterized in that the measuring pipe (31) comprises a first vertical pipe (311), a horizontal pipe (312) and a second vertical pipe (313), one end of the first vertical pipe (311) is communicated with a measuring liquid outlet at the bottom of the piston outer pipe (23), the other end of the first vertical pipe (311) is communicated with one end of the horizontal pipe (312), the horizontal pipe (312) is sleeved in the measuring pipe protective sleeve (15) in a penetrating mode, the other end of the horizontal pipe (312) is communicated with the lower end of the second vertical pipe (313), and the second vertical pipe (313) is tightly fixed on the graduated scale (32).
10. A roadbed ramming influence depth testing method, which is characterized in that the roadbed ramming influence depth testing device of any one of claims 1 to 9 is used, and comprises the following steps:
step 1, burying a plurality of roadbed ramming influence testing devices at preset testing points of roadbed packing layers with different heights;
step 2, applying a tamping load on the roadbed filling, measuring and reading filling relative displacement values at preset measuring points of roadbed filling layers with different heights, and drawing a depth-filling relative displacement curve;
and 3, obtaining the roadbed ramming influence depth according to the depth-filler relative displacement curve in the step 2.
CN201911046168.5A 2019-10-30 2019-10-30 Roadbed ramming influence depth testing device and testing method Pending CN110777764A (en)

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Application publication date: 20200211