Earthen archaeological site fracture grouting method based on real-time monitoring
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A technology for real-time monitoring and soil relics, applied in measurement devices, soil protection, infrastructure engineering, etc., can solve the problems of lack of interface treatment, lack of precise control of grouting process, etc., to avoid hysteresis and one-sidedness, high reinforcement effect Effect
Active Publication Date: 2022-07-29
LANZHOU UNIVERSITY OF TECHNOLOGY
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[0006] Aiming at the technical problems of lack of interface treatment and insufficient precise control of the grouting process in the existing soil site crack grouting reinforcement, the present invention proposes a real-time monitoring-based soil site crack grouting method, which can effectively treat the crack interface by slotting Improve the reinforcement effect, monitor the grouting process to achieve fine control grouting, the combination of the two can achieve the best crack grouting reinforcement effect
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Embodiment 1
[0040] like figure 1 As shown, the present invention provides a grouting method for cracks in soil sites based on real-time monitoring, comprising the following steps:
[0041] Step S1, obtaining site parameters: the site parameters include the width of the crack and the uniaxial compressive strength of the soil site body; test the width of the crack, and use the method of the present invention for crack grouting reinforcement for cracks with a crack width of 5-15 cm; test The uniaxial compressive strength of the body of the soil site is classified into three grades: soft, medium and hard according to the uniaxial compressive strength of less than 1.5MPa, 1.5~3MPa, and greater than 3MPa.
[0042] Step S2, floating soil treatment: use the foundation bearing capacity penetration instrument to test the strength of the floating soil on both sides of the crack, mark the soil body with penetration resistance in the range of 0~75N, and remove this part of the soil body.
[0043] Due...
Embodiment 2
[0067] A method for grouting cracks in soil sites based on real-time monitoring. In this embodiment, a crack in a certain soil site is selected for grouting reinforcement, and the specific steps are as follows:
[0068] Step S1: The width of the test crack is 10cm, the uniaxial compressive strength of the soil is 3.5MPa, and the classification is hard.
[0069] Step S2: Use the foundation bearing capacity penetration instrument to test the penetration resistance of the soil on both sides of the crack, and remove the soil less than 75N.
[0070] Step S3: the cross-sectional shape of the slot is an isosceles triangle, the opening width is 2cm, the depth of soil penetration is 1cm, the height interval is 6cm, and the inclination angle is 10°.
[0071] Step S4: Use SH solution with a mass concentration of 1.5% to spray the fracture surface three times from bottom to top. When runoff occurs on the fracture surface, the first spraying is completed, and the second spraying is carried...
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Abstract
The invention provides an earthen archaeological site fracture grouting method based on real-time monitoring, which comprises the following steps: acquiring archaeological site parameters of an earthen archaeological site body with fractures, and grading the earthen archaeological site according to the archaeological site parameters; removing surface soil on two sides of the crack; crack surface grooving is conducted, specifically, control indexes of crack surface grooving are determined according to the earthen archaeological site grading, and topsoil in grooving is cleaned according to the control indexes; crack surface spray moistening; monitoring sensors are arranged in layers; layering formwork erecting is conducted on the free face of the fracture from bottom to top according to the layering height of the monitoring sensor, and back pressure is provided; and layered grouting monitoring is conducted, specifically, grouting is conducted from the bottommost layer, vibrating is conducted through a micro vibrating rod, data of soil bodies on the two sides of the crack are monitored through a monitoring sensor, and when the monitoring data meet a preset threshold value, grouting is conducted on the next layer. The reinforcing effect is effectively enhanced through slotting; the grouting process is guaranteed to be smoothly carried out through real-time monitoring, and data support is provided for follow-up crack grouting reinforcement effect evaluation.
Description
technical field [0001] The invention relates to the technical field of grouting reinforcement of soil site fissures, in particular to a grouting method for soil site fissures based on real-time monitoring, which can also be applied to related fields such as geotechnical engineering. Background technique [0002] In the arid and semi-arid northwestern region of China, there are a large number of ancient soil sites, such as the Dadiwan human settlement site in Qin'an County, Gansu, the ancient city of Jiaohe in Turpan, Xinjiang, and the Xixia Mausoleum in Yinchuan. Affected by the construction technology and natural environment, there are fissures or cracks of different forms and scales in the body of the earthen site. The investigation found that the fissures mainly include weathering fissures, unloading fissures, and construction process fissures. Due to the different severity of development, some of the fissures have already developed through the body of the site to form t...
Claims
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