Grouting reinforcement method capable of effectively reducing non-uniform settlement of building foundation

Abstract

The invention relates to a grouting reinforcement method capable of effectively reducing non-uniform settlement of a building foundation. The grouting reinforcement method comprises the following steps of acquiring location information of an excavation face with a tunnel diameter D in real time; determining a horizontal distance L from the tunnel excavation face to a geometrical center of the building foundation according to the location information; when L is determined to be equal to mD (m being a setting coefficient determined according to a stratum condition), determining a reinforced grouting region and a common grouting region with the tunnel diameter of an excavated tunnel of the building foundation according to a Peck curve formed by the tunnel diameter of the excavated tunnel; carrying out grouting reinforcement on the reinforced grouting region and the common grouting region by utilizing a pressure grouting method; and controlling grouting amount by utilizing grouting pressure, stopping grouting when final grouting pressure of the reinforced grouting region reaches a first set strength threshold value, and stopping grouting when final grouting pressure of the common grouting region reaches a second set strength threshold value. The grouting reinforcement method can effectively make up settlement caused by stratum loss, so that settlement in the middle of a settling tank trends to be consistent with that at the two sides of the settling tank, and differential settlement of the building foundation is reduced; and cost is low.

Description

technical field

[0001] The invention relates to the field of tunnel construction, in particular to a grouting reinforcement method for effectively reducing uneven settlement of building foundations. Background technique

[0002] With the increase of national infrastructure investment and construction, the number of urban subway and municipal pipeline projects increases, and the situation of passing through buildings occurs from time to time. While excavating the building, it is necessary to strictly control the maximum settlement of the foundation caused by tunnel excavation. But for buildings, the most unfavorable situation is not the overall settlement of the foundation, but differential settlement (uneven settlement). Larger differential settlement will cause the building to tilt or even crack, especially for some high-rise buildings, which are more sensitive to differential settlement.

[0003] At present, in the field of tunnel construction, the measures used to contr...

Examples

Embodiment 1

[0040] The invention provides a grouting reinforcement method for effectively reducing the uneven settlement of building foundations, the implementation process of which is as follows figure 1 shown, including the following steps:

[0041] Step S101, obtaining the position information of the excavation surface of the tunnel diameter (denoted as D) in real time;

[0042] The centerline of the tunnel diameter coincides with the centerline of the building foundation.

[0043] Step S102, according to the location information of the excavation surface of the tunnel diameter, determine the horizontal distance from the tunnel excavation surface to the geometric center point of the building foundation, denoted as L (see figure 2 );

[0044] Step S103, judging whether L=mD (wherein m is a set coefficient, determined according to the formation conditions) is established, if not established, then proceed to step S101; if established, then proceed to step S104;

[0045] When determini...

Embodiment 2

[0070] The difference between the second embodiment of the present invention and the first embodiment is that the second embodiment only includes steps S101-S106 in the first embodiment. The uneven settlement of the tunnel building foundation can be effectively reduced through the grouting reinforcement process of these steps.

technical field

[0001] The invention relates to the field of tunnel construction, in particular to a grouting reinforcement method for effectively reducing uneven settlement of building foundations. Background technique

[0002] With the increase of national infrastructure investment and construction, the number of urban subway and municipal pipeline projects increases, and the situation of passing through buildings occurs from time to time. While excavating the building, it is necessary to strictly control the maximum settlement of the foundation caused by tunnel excavation. But for buildings, the most unfavorable situation is not the overall settlement of the foundation, but differential settlement (uneven settlement). Larger differential settlement will cause the building to tilt or even crack, especially for some high-rise buildings, which are more sensitive to differential settlement.

[0003] At present, in the field of tunnel construction, the measures used to contr...

Examples

Embodiment 1

[0040] The invention provides a grouting reinforcement method for effectively reducing the uneven settlement of building foundations, the implementation process of which is as follows figure 1 shown, including the following steps:

[0041] Step S101, obtaining the position information of the excavation surface of the tunnel diameter (denoted as D) in real time;

[0042] The centerline of the tunnel diameter coincides with the centerline of the building foundation.

[0043] Step S102, according to the location information of the excavation surface of the tunnel diameter, determine the horizontal distance from the tunnel excavation surface to the geometric center point of the building foundation, denoted as L (see figure 2 );

[0044] Step S103, judging whether L=mD (wherein m is a set coefficient, determined according to the formation conditions) is established, if not established, then proceed to step S101; if established, then proceed to step S104;

[0045] When determini...

Embodiment 2

[0070] The difference between the second embodiment of the present invention and the first embodiment is that the second embodiment only includes steps S101-S106 in the first embodiment. The uneven settlement of the tunnel building foundation can be effectively reduced through the grouting reinforcement process of these steps.

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