Method for reinforcing and increasing foundation pit passive earth pressure
A passive earth pressure and foundation pit technology, which is applied in the fields of soil protection, excavation, and infrastructure engineering, can solve the problems of long construction period, heavy engineering workload, and high cost, so as to reduce construction workload, reduce engineering costs, The effect of simple construction technology
Inactive Publication Date: 2009-09-02
黎志中
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Problems solved by technology
Existing methods to increase passive earth pressure are mainly to do deep mixing piles or use high-pressure grouting to reinforce the passive earth pressure area before excavation of the foundation pit. high
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[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0015] It needs to be specially explained here. Before implementing the present invention, the specific geological conditions, foundation pit design parameters, grouting scheme and foundation pit support pile construction scheme related to the present invention are known.
[0016] refer to figure 1 , a method for reinforcing and improving the passive earth pressure of foundation pit provided by the invention comprises the following steps:
[0017] (1) Pre-binding high-pressure grouting pipes on the outside of the foundation pit support piles, and penetrate into the ground together with the foundation pit support piles;
[0018] In this embodiment, a suitable prefabricated reinforced concrete pipe pile 1 and two high-pressure grouting pipes 3, 4 are selected. Two (two groups) of high-pressure grouting pipes 3 and 4 are bound to the prefabricated reinfo...
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The invention relates to a method for strengthening and increasing the passive earth pressure of a foundation pit, which is characterized in that it comprises the following steps: (1) pre-binding a high-pressure grouting pipe on the outside of the foundation pit support piles, and running through the foundation pit support piles together (2) use the grouting pump to inject the cement slurry into the pressure area designated by the passive soil through the grouting pipe to mix with the passive soil; the beneficial effect of the present invention is that 1. The piles are penetrated into the ground together without additional construction; ②The grout is accurately injected into the designated passive earth pressure area through the preset grouting pipe to reinforce and improve the pressure bearing capacity of the passive soil; ③After the grouting is completed, recycle the pipe and repeat Use; ④The construction process of the whole construction process is simple and convenient.
Description
technical field [0001] The invention relates to a support technology for a deep foundation pit during the excavation process of the deep foundation pit in civil engineering, in particular to a method for reinforcing and increasing the passive earth pressure of the foundation pit. Background technique [0002] At present, in the existing deep foundation pit excavation construction process, in order to prevent the stress change in the soil in the foundation pit caused by the continuous increase of the excavation depth during the excavation of the foundation pit, resulting in excessive deformation of the foundation pit, or even damage, affecting the foundation The construction of the pit will endanger the life safety of the construction personnel, and the foundation pit will be supported. In the design of foundation pit support, the force-bearing structure no matter adopts cantilever type, external suspension type (anchor, soil nail) or internal support type (including diagonal...
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IPC IPC(8): E02D17/04E02D3/12E02D5/62
Inventor 黎志中
Owner 黎志中