Test device and method for bearing characteristic of pressure-type anchor rod under horizontal load effect

A model test device and horizontal load technology, which is applied in the test of foundation structure, building, sheet pile wall, etc., can solve the difference of bearing characteristics, cannot directly observe the soil deformation and development law, and cannot form three-dimensional soil compressive stress Field distribution shape and other issues to achieve the effect of solving the non-visualization

Pending Publication Date: 2019-10-18
SHANDONG JIANZHU UNIV +2
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  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the research methods for the load-bearing characteristics of pressure-type bolts mainly use numerical simulation or on-site full-scale test methods, which cannot directly observe the deformation and development law of the soil around the rod under load, and the deformation law of the soil is different from that of the pressure type. The load-bearing properties of anchor rods are closely related to
The invention patent with the application number of 201810309931.8-Visual model test device and test method for the anchorage mechanism of pressure dispersion type bolt discloses the research method and device for the anchorage mechanism of pressure dispersion type bolt under the action of vertical load, but its research objects are mainly Pressure-type anchors that bear vertical l

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  • Test device and method for bearing characteristic of pressure-type anchor rod under horizontal load effect
  • Test device and method for bearing characteristic of pressure-type anchor rod under horizontal load effect
  • Test device and method for bearing characteristic of pressure-type anchor rod under horizontal load effect

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Embodiment 1

[0068] Such as Figure 1-7 As shown, it is a model test device for the load-bearing characteristics of a pressure-type anchor under a horizontal load in an embodiment of the present invention, including a transparent model box 5 with a side opening and a loading device, and the loading device is located on one side of the opening of the model box 5;

[0069] The outer side of the bottom of the model box 5 is provided with a protective device, and the protective device includes a rectangular base plate, on which a guard plate 6 is vertically connected, and the rectangular base plate and the vertical guard plate 6 form a space for accommodating the model box 5 , the model box 5 is placed in the protection device; a detachable baffle 7 is provided between the opening side of the model box 5 and the protection device;

[0070] One side of the model box 5, close to the inner wall of the box, is provided with a pressure type anchor rod, and the pressure type anchor rod includes a ro...

Embodiment 2

[0089] The present invention also provides a model test method for the load-bearing characteristics of a pressure-type anchor under horizontal load, which includes the following steps:

[0090] Step 1. Build a visual model test device

[0091] Choose a solid and stable level ground, place the protective device for the model box, and ensure that the protective device is close to the ground without shaking. Carefully put the model box into the protective device, put the baffle into the reserved gap between the protective device and the glass box, and ensure that the baffle is closely attached to the opening side of the glass box;

[0092] Step 2: Fill in the sand and gravel soil for the test layer by layer and embed anchor rods, earth pressure monitoring devices, etc.

[0093] Fill the test sand and gravel into the model box layer by layer, with a layer height of 5 cm, and manually tamp it layer by layer with a rammer to ensure the compactness of the test sand and gravel soil i...

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Abstract

The invention provides a test device and method for the bearing characteristic of a pressure-type anchor rod under a horizontal load effect. The test device comprises a transparent model box, a loading device and soil pressure monitoring devices; an opening is formed in one side of the transparent model box; the loading device is positioned on one side of the opening of the model box; a pressure-type anchor rod is arranged on one side surface, adjacent to the opening, of the model box and clings to the inner wall of a box body; a dial gage is arranged at the top end of an anchor rod body; a baffle is arranged on one side of the opening of the model box; a hole for allowing the rod body to pass through is formed in the baffle; the loading device comprises an adjustable loading bracket, a fixed pulley on the adjustable loading bracket, and a connecting wire for winding the fixed pulley; one end of the connecting wire is connected with the anchor rod, and the other end of the connecting wire is connected with a weight disk used for holding a weight; and the soil pressure monitoring devices are distributed in test sandy and stony soil in the model box in a certain arranging way. The test device ensures that anchor rods under different buried depth conditions can be loaded horizontally, and besides, the test device can perform a horizontal tensile test on the multiple anchor rods synchronously.

Description

technical field [0001] The invention belongs to the technical field of underground geotechnical engineering, and relates to a model test device and a test method, in particular to a model test device and method for the load-bearing characteristics of a pressure-type bolt under horizontal load. Background technique [0002] Rock-soil prestressed anchorage technology has increasingly become the preferred method in rock-soil reinforcement projects such as high slopes and dams due to its advantages of small disturbance to rock-soil mass, fast construction, safety, and economy, and has achieved huge economic and social benefits. benefit. According to the force form of the inner anchorage section, it can be divided into tension anchor and pressure anchor. The tension anchor uses the interface shear stress between the rod body and the grouting body, and between the grouting body and the surrounding rock mass to provide pullout anchorage. Therefore, it is only suitable for stable r...

Claims

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Application Information

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IPC IPC(8): E02D33/00E02D5/74
CPCE02D33/00E02D5/74
Inventor 张思峰熊斌赵宁杨栋柴荣山张光桥刘敏商淑杰张永圣胡文军黄维王延忠冯兴广刘长瑞吕立瑞
Owner SHANDONG JIANZHU UNIV
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