CN209841650U - Pipe jacking of pipe jacking experimental box - Google Patents

Pipe jacking of pipe jacking experimental box Download PDF

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CN209841650U
CN209841650U CN201920371335.2U CN201920371335U CN209841650U CN 209841650 U CN209841650 U CN 209841650U CN 201920371335 U CN201920371335 U CN 201920371335U CN 209841650 U CN209841650 U CN 209841650U
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jacking
pipe
grouting
pipe jacking
construction
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黎永索
曾旺辉
黎剑超
陈宏伟
胡达
梁小强
张胜
毛广湘
洪亮
麻彦娜
湛练
周时著
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Hunan City University
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Hunan City University
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Abstract

本实用新型公开了一种自带注浆机构的顶管实验箱的顶管,其特征是所述顶管包括有同一中心轴线的内顶管、外顶管,内顶管与外顶管之间通过骨架连接固定,外顶管上设有注浆孔、出浆孔;本实用新型的顶管具有结构简单,可视化,顶管作业和注浆方便等特点,在顶管同时,同步进行注浆,可进行模拟现场多条件下的顶管施工引发地层变形的模型试验。

The utility model discloses a pipe jacking of a pipe jacking experiment box with a grouting mechanism, which is characterized in that the jacking pipe includes an inner pipe jacking and an outer pipe jacking with the same central axis, and the difference between the inner jacking pipe and the outer pipe jacking is The space is connected and fixed by the skeleton, and the outer jacking pipe is provided with a grouting hole and a grouting hole; the jacking pipe of the utility model has the characteristics of simple structure, visualization, and convenient pipe jacking operation and grouting. Slurry can be used to conduct model tests to simulate formation deformation caused by pipe jacking construction under multiple conditions on site.

Description

顶管实验箱的顶管Jacking pipe of the pipe jacking experiment box

技术领域technical field

本实用新型涉及一种地下工程顶管施工试验技术领域,具体地是涉及一种顶管实验箱的顶管,特别是涉及一种自带注浆机构的顶管实验箱的顶管。The utility model relates to the technical field of pipe jacking construction tests in underground engineering, in particular to a pipe jacking experiment box, in particular to a pipe jacking experiment box equipped with a grouting mechanism.

背景技术Background technique

城市化发展过程中,城市扩张与稀缺土地资源供给不足的矛盾越来越明显。地下空间开发的规划和开发,可提高城市设施水平以增加城市的竞争力。随着地下空间开发的规模越来越大,地下空间的开发受到地质条件、水文条件、岩土类型、地面空间类型、已有地下设施、施工技术、经济能力、文化遗址、开发后的社会效益和环境效益等诸多因素的影响和制约,且开发利用具有一定的不可逆性,建成后很难改造或重建。地下空间建设中遇到的问题复杂,地下工程建设具有投资大、施工周期长、施工项目多、施工技术复杂、不可预见风险因素多和对社会环境影响大等特点,是一项高风险建设工程。近几年城市地下工程建造过程中,基坑垮塌、地面沉陷、隧道涌水、掌子面垮塌、临近建筑物倾斜与倒塌等安全事故频发,不仅延误了工期,还造成了很大的经济损失和人员伤亡。In the process of urbanization, the contradiction between urban expansion and insufficient supply of scarce land resources is becoming more and more obvious. The planning and development of underground space development can improve the level of urban facilities to increase the competitiveness of the city. With the increasing scale of underground space development, the development of underground space is affected by geological conditions, hydrological conditions, rock and soil types, ground space types, existing underground facilities, construction technology, economic capacity, cultural sites, and social benefits after development. Influenced and restricted by many factors such as environmental benefits and environmental benefits, and the development and utilization are irreversible, it is difficult to transform or rebuild after completion. The problems encountered in the construction of underground space are complex. Underground engineering construction has the characteristics of large investment, long construction period, many construction projects, complex construction technology, many unforeseen risk factors, and great impact on the social environment. It is a high-risk construction project. . In recent years, during the construction of urban underground projects, safety accidents such as foundation pit collapse, ground subsidence, tunnel water gushing, tunnel surface collapse, and adjacent buildings tilting and collapsing have occurred frequently, which not only delayed the construction period, but also caused great economic losses. and casualties.

顶管施工就是非开挖施工方法,是一种不开挖或者少开挖的管道埋设施工技术,它以液压为动力将顶管机和待铺设的管节在地下逐节顶进。施工过程中,不可避免地会对管道周围的土体产生扰动,引起管道周围土体产生变形,引起地面和地下土体的位移,即地层变形。当地层变形超过一定范围时,会严重危及邻近建( 构) 筑物基础、邻近建( 构) 筑物、地下管网和地面建筑物的安全,引起一系列岩土工程问题。目前,在顶管工法的设计与施工中,需要使用顶管实验箱模拟现场多条件下的顶管施工而引发地层变形的模型试验。Pipe jacking construction is a non-excavation construction method. It is a pipeline burying construction technology without excavation or less excavation. It uses hydraulic pressure as the power to jack the pipe jacking machine and the pipe joints to be laid underground one by one. During the construction process, the soil around the pipeline will inevitably be disturbed, causing deformation of the soil around the pipeline, causing displacement of the ground and underground soil, that is, stratum deformation. When the formation deformation exceeds a certain range, it will seriously endanger the safety of the foundation of adjacent buildings (structures), adjacent buildings (structures), underground pipe network and ground buildings, and cause a series of geotechnical problems. At present, in the design and construction of the pipe jacking method, it is necessary to use the pipe jacking test box to simulate the model test of the ground deformation caused by the pipe jacking construction under various conditions on site.

为了减小顶进时顶管所受摩阻力和控制顶管施工引起地表沉降,需要对管道周边土体以一定压力注入浆液,简称注浆。顶管在顶进的时进行的同步注浆和顶管结束后进行的充填注浆是顶管施工中的关键技术环节之一。同步注浆和充填注浆所用浆液性质不一样,其作用也不一样。同步注浆所注浆液起到的作用主要体现在两个方面:1、减阻作用;2、填充与支撑作用。顶管结束后,进行充填注浆,充填注浆起到充填和控制地层沉降的作用。In order to reduce the frictional resistance of pipe jacking during jacking and control the surface settlement caused by pipe jacking construction, it is necessary to inject grout into the soil around the pipe under a certain pressure, referred to as grouting. Synchronous grouting during pipe jacking and filling grouting after pipe jacking are one of the key technical links in pipe jacking construction. The properties of the grout used in synchronous grouting and filling grouting are different, and their functions are also different. The role of the grouting fluid in synchronous grouting is mainly reflected in two aspects: 1. Drag reduction; 2. Filling and supporting. After the pipe jacking is completed, filling and grouting will be carried out, and the filling and grouting will play the role of filling and controlling formation settlement.

申请号为201210137982.X的发明专利申请公开了一种顶管注浆减阻的室内模拟实验系统,它包括试验箱、水平加载系统、竖向加载系统、注浆系统以及与该注浆系统相连的注浆导管等,所述待测管道由相互连接的管道前段和管道后段构成,且管道前段的管径粗于管道后段的管径,待测管道的管道壁上开设有至少一个注浆孔,所述注浆导管的出浆端伸入待测管道内并与所述注浆孔相连。该试验系统能模拟管道在土层中的顶进过程,测试在不同浆液配比、不同注浆压力下,管道顶进过程中的摩阻力和摩擦系数。但是,由于其注浆管需预先埋设在试验箱土体中,而工程实践中不可能预先埋设注浆管,且在顶管模拟过程中预埋的注浆管对周围土体有约束作用,不能很好的模拟实际顶管施工。因此,有必要发明一种能够真实模拟顶管施工实验中能进行顶管施工和同步注浆的顶管。The invention patent application with the application number 201210137982.X discloses an indoor simulation experiment system for pipe jacking grouting drag reduction, which includes a test chamber, a horizontal loading system, a vertical loading system, a grouting system, and a system connected to the grouting system. grouting conduits, etc., the pipeline to be tested is composed of the interconnected front section and the rear section of the pipeline, and the diameter of the front section of the pipeline is thicker than the diameter of the rear section of the pipeline, and at least one grouting pipe is provided on the pipeline wall of the pipeline to be tested. A grouting hole, the grouting end of the grouting conduit extends into the pipeline to be tested and is connected with the grouting hole. The test system can simulate the jacking process of the pipeline in the soil layer, and test the frictional resistance and friction coefficient during the jacking process of the pipeline under different grout ratios and different grouting pressures. However, since the grouting pipe needs to be pre-embedded in the soil of the test box, it is impossible to bury the grouting pipe in advance in engineering practice, and the pre-embedded grouting pipe has a restraining effect on the surrounding soil during the pipe jacking simulation process. It cannot simulate the actual pipe jacking construction well. Therefore, it is necessary to invent a pipe jacking that can truly simulate pipe jacking construction and synchronous grouting in pipe jacking construction experiments.

发明内容Contents of the invention

本实用新型的目的是提供一种自带注浆机构的顶管实验箱的顶管。The purpose of the utility model is to provide a pipe jacking experiment box with a grouting mechanism.

本实用新型是采用如下技术方案实现其发明目的的,一种顶管实验箱的顶管,所述顶管包括有同一中心轴线的内顶管、外顶管,内顶管与外顶管之间通过骨架连接固定,外顶管上设有注浆孔、出浆孔。The utility model realizes the purpose of the invention by adopting the following technical scheme, a pipe jacking of a pipe jacking experiment box, the pipe jacking includes an inner pipe jacking and an outer pipe jacking with the same central axis, and the difference between the inner jacking pipe and the outer pipe jacking is The space is connected and fixed by the skeleton, and the outer jacking pipe is provided with grouting holes and grouting holes.

为注浆方便,本实用新型所述骨架将内顶管与外顶管之间的空间分隔成至少2个轴向的独立空间,外顶管上对应每个独立空间分别设有注浆孔、出浆孔。For the convenience of grouting, the framework of the utility model divides the space between the inner jacking pipe and the outer jacking pipe into at least two axial independent spaces, and the outer jacking pipe is respectively provided with grouting holes, Pulp hole.

为直观演示顶管施工的影响,本实用新型所述内顶管、外顶管与骨架为透明材料。In order to visually demonstrate the influence of pipe jacking construction, the inner pipe jacking, outer pipe jacking and skeleton described in the utility model are made of transparent materials.

由于采用上述技术方案,本实用新型较好的实现了发明目的,顶管具有结构简单,可视化,顶管作业和注浆方便等特点,在顶管同时,同步进行注浆,可进行模拟现场多条件下的顶管施工引发地层变形的模型试验。Due to the adoption of the above-mentioned technical scheme, the utility model better realizes the purpose of the invention. The pipe jacking has the characteristics of simple structure, visualization, convenient pipe jacking operation and grouting. At the same time of pipe jacking, the grouting is carried out synchronously, and many simulations can be carried out on site. Model test of formation deformation induced by pipe jacking construction under different conditions.

附图说明Description of drawings

图1是本实用新型的结构示意图;Fig. 1 is the structural representation of the utility model;

图2是图1的E-E剖面图;Fig. 2 is the E-E sectional view of Fig. 1;

图3是图1的A-A剖面图;Fig. 3 is the A-A sectional view of Fig. 1;

图4是图1的B-B剖面图;Fig. 4 is the B-B sectional view of Fig. 1;

图5是图1的C-C剖面图;Fig. 5 is a C-C sectional view of Fig. 1;

图6是图1的D-D剖面图。Fig. 6 is a D-D sectional view of Fig. 1 .

具体实施方式Detailed ways

下面结合附图及实施例对本实用新型作进一步说明。Below in conjunction with accompanying drawing and embodiment the utility model is further described.

实施例1:Example 1:

由图1、图2可知,一种顶管实验箱的顶管,所述顶管包括有同一中心轴线的内顶管31、外顶管32,内顶管31与外顶管32之间通过骨架33连接固定,外顶管32上设有注浆孔、出浆孔。It can be seen from Fig. 1 and Fig. 2 that a pipe jacking of a pipe jacking experiment box includes an inner jacking pipe 31 and an outer jacking pipe 32 with the same central axis, and the inner jacking pipe 31 and the outer jacking pipe 32 pass through The skeleton 33 is connected and fixed, and the outer jacking pipe 32 is provided with a grouting hole and a grouting hole.

为直观演示顶管施工的影响,本实用新型所述内顶管31、外顶管32与骨架33为透明材料。In order to visually demonstrate the impact of pipe jacking construction, the inner pipe jacking 31, the outer pipe jacking 32 and the skeleton 33 described in the utility model are made of transparent materials.

本实施例采用透明板材与骨架围成一个方形箱体,箱体底部设有排水孔。根据实验要求,往箱体内分层填筑所选择的透明土,并压实,填土过程中,安装好测量采集土压力值和地层位移数值的测量装置。所述测量装置包括土压力盒、测斜管、沉降钉等。In this embodiment, a square box is surrounded by a transparent board and a skeleton, and a drainage hole is provided at the bottom of the box. According to the requirements of the experiment, the selected transparent soil is filled in layers in the box and compacted. During the filling process, the measuring device for measuring and collecting the soil pressure value and the stratum displacement value is installed. The measuring devices include earth pressure cells, inclinometer tubes, settlement nails and the like.

本实施例的内顶管31与外顶管32之间形成1个独立空间,在外顶管32上设有1个注浆孔,根据顶管长度设置多个出浆孔。在千斤顶上设有测力机构。In this embodiment, an independent space is formed between the inner jacking pipe 31 and the outer jacking pipe 32, and one grouting hole is provided on the outer jacking pipe 32, and multiple grouting holes are set according to the length of the jacking pipe. There is a force measuring mechanism on the jack.

实验时,先将注浆设备与外顶管32上的注浆孔连接,将外顶管32外露的出浆孔临时用橡胶套封堵,顶管时,每次顶入5~10㎝后,通过注浆设备注浆,浆液从出浆孔流向外顶管32管壁外侧,充填在外顶管32外侧和管外土体之间的空隙内,以减少后续顶管时的阻力。根据顶管行程,确定各出浆孔的开闭。重复上述步骤,直至顶管3全部顶入透明土内。采集土压力值和地层位移数值,进行地层力学响应分析;通过千斤顶上设有的测力机构采集千斤顶顶进过程的顶力,并对注浆减阻效果进行评定;进行顶管减阻施工实验。During the experiment, first connect the grouting equipment to the grouting hole on the outer jacking pipe 32, and temporarily seal the exposed grouting hole of the outer jacking pipe 32 with a rubber sleeve. , grouting through the grouting equipment, the grout flows from the grout hole to the outside of the pipe wall of the outer jacking pipe 32, and fills in the gap between the outer side of the outer jacking pipe 32 and the soil outside the pipe, so as to reduce the resistance during subsequent pipe jacking. According to the pipe jacking stroke, determine the opening and closing of each slurry outlet. Repeat the above steps until all the jacking pipes 3 are pushed into the transparent soil. Collect the soil pressure value and stratum displacement value, and analyze the mechanical response of the stratum; collect the jacking force of the jacking process through the force measuring mechanism on the jack, and evaluate the drag reduction effect of grouting; conduct the drag reduction construction experiment of pipe jacking .

顶管结束后,还可进行充填注浆,进行顶管注浆抬升试验。After the pipe jacking is completed, filling and grouting can also be carried out, and the lifting test of the pipe jacking grouting can be carried out.

实施例2:Example 2:

由图1、图3、图4、图5、图6可知,为注浆方便,本实用新型所述骨架33将内顶管31与外顶管32之间的空间分隔成至少2个轴向的独立空间,外顶管32上对应每个独立空间分别设有注浆孔、出浆孔。From Fig. 1, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, it can be known that for the convenience of grouting, the framework 33 of the utility model divides the space between the inner jacking pipe 31 and the outer jacking pipe 32 into at least two axial Each independent space is provided with a grouting hole and a grouting hole corresponding to each independent space on the outer jacking pipe 32 .

本实施例将内顶管31与外顶管32之间的空间分隔成4个轴向的独立空间,外顶管32上对应每个独立空间分别设有注浆孔3E、出浆孔3A,注浆孔3F、出浆孔3B,注浆孔3G、出浆孔3C,注浆孔3H、出浆孔3D。In this embodiment, the space between the inner jacking pipe 31 and the outer jacking pipe 32 is divided into four axial independent spaces, and the outer jacking pipe 32 is respectively provided with a grouting hole 3E and a grouting hole 3A corresponding to each independent space. Grouting hole 3F, grouting hole 3B, grouting hole 3G, grouting hole 3C, grouting hole 3H, grouting hole 3D.

实验时,先将注浆管与注浆孔3E连接,注浆孔3E与外顶管32最顶端的出浆孔3A对应,再对千斤顶加压推动顶管3前移;根据顶管3的顶入行程,再将注浆管分别与注浆孔3F、注浆孔3G、注浆孔3H连接,分别对应由出浆孔3B、出浆孔3C、出浆孔3D出浆。采集土压力值和地层位移数值,进行地层力学响应分析;通过千斤顶上设有的测力机构采集千斤顶顶进过程的顶力,并对注浆减阻效果进行评定;进行顶管减阻施工实验。During the experiment, first connect the grouting pipe to the grouting hole 3E, and the grouting hole 3E corresponds to the grouting hole 3A at the top of the outer jacking pipe 32, and then pressurize the jack to push the jacking pipe 3 forward; Push into the stroke, and then the grouting pipes are respectively connected with the grouting hole 3F, the grouting hole 3G, and the grouting hole 3H, respectively corresponding to the grouting hole 3B, the grouting hole 3C, and the grouting hole 3D. Collect the soil pressure value and stratum displacement value, and analyze the mechanical response of the stratum; collect the jacking force of the jacking process through the force measuring mechanism on the jack, and evaluate the drag reduction effect of grouting; conduct the drag reduction construction experiment of pipe jacking .

顶管结束后,还可进行充填注浆,将注浆管与注浆孔3E、注浆孔3F、注浆孔3G和注浆孔3H连接,进行顶管注浆抬升试验。After the pipe jacking is completed, filling and grouting can also be carried out, and the grouting pipe is connected with the grouting hole 3E, the grouting hole 3F, the grouting hole 3G and the grouting hole 3H, and the pipe jacking grouting uplift test is carried out.

余同实施例1。The rest are the same as embodiment 1.

Claims (3)

1.一种顶管实验箱的顶管,其特征是所述顶管包括有同一中心轴线的内顶管、外顶管,内顶管与外顶管之间通过骨架连接固定,外顶管上设有注浆孔、出浆孔。1. A pipe jacking of a pipe jacking experiment box, characterized in that said pipe jacking includes an inner pipe jacking and an outer pipe jacking of the same central axis, the inner jacking pipe and the outer pipe jacking are connected and fixed by a skeleton, and the outer pipe jacking There are grouting holes and grouting holes on the top. 2.根据权利要求1所述的顶管实验箱的顶管,其特征是所述骨架将内顶管与外顶管之间的空间分隔成至少2个轴向的独立空间,外顶管上对应每个独立空间分别设有注浆孔、出浆孔。2. The pipe jacking of the pipe jacking experiment box according to claim 1, characterized in that the space between the inner pipe jacking and the outer pipe jacking is divided into at least 2 axially independent spaces by the framework, and the space on the outer pipe jacking is Corresponding to each independent space, a grouting hole and a grouting hole are respectively provided. 3.根据权利要求1或2所述的顶管实验箱的顶管,其特征是所述内顶管、外顶管与骨架为透明材料。3. The pipe jacking of the pipe jacking experiment box according to claim 1 or 2, characterized in that the inner pipe jacking, outer pipe jacking and skeleton are made of transparent materials.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109991158A (en) * 2019-03-22 2019-07-09 湖南城市学院 pipe jacking test box

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109991158A (en) * 2019-03-22 2019-07-09 湖南城市学院 pipe jacking test box

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