A water immersion load test method for a strip foundation model

A strip foundation and load test technology, which is applied in foundation structure test, on-site foundation soil survey, foundation structure engineering, etc., can solve the problems of inability to simulate strip foundation and surface settlement change, inaccurate plate load test results, Problems such as strip foundations and surface settlement states cannot be accurately simulated

Active Publication Date: 2018-07-20
CHINA JK INST OF ENG INVESTIGATION & DESIGN +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, in order to achieve a better simulation effect, the stiffness and size of the pressure-bearing plate are required to be close to the strip foundation of the building. The size of the strip foundation to be constructed is close to that of the building, and the size effect of the bearing plate will have a great influence on the settlement of the foundation; secondly, in the plate load test, the bearing plate is exposed on the ground, while the strip foundation of the building is buried In the filling, the depth of the strip foundation will affect the settlement of the strip foundation and the bearing capacity of the underlying soil, resulting in inaccurate results of the plate load test; thirdly, when carrying out the flooded plate load test, the existing method can only It can be immersed in water in a small area around the pressure plate (generally, the side length or diameter of the immersion test pit is 3 times the side length or diameter of the pressure plate), and small area immersion cannot accurately simulate the intermittent or continuous conditions of the actual construction site. The subsidence state of the strip foundation and the ground surface during flooding cannot simulate the change in the settlement of the strip foundation and the surface caused by the infiltration of surface water from the outside of the cushion to the inside of the cushion, and it is impossible to obtain the untreated lower part of the strip foundation during the flooding process. The change of volume moisture content of the collapsible soil layer

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  • A water immersion load test method for a strip foundation model
  • A water immersion load test method for a strip foundation model
  • A water immersion load test method for a strip foundation model

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Experimental program
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Embodiment Construction

[0060] Such as figure 1 Shown, the present invention comprises the following steps:

[0061] Step 1, construction of the strip foundation model: Excavating the foundation pit 1 from top to bottom, and building a strip foundation model 5 in the foundation pit 1, and installing monitoring elements at the same time during the construction of the strip foundation model 5, The process is as follows:

[0062] Step 101, foundation pit excavation: In the construction strip foundation research site, excavate foundation pit 1 in advance from top to bottom, wherein, the foundation pit 1 is a rectangular foundation pit;

[0063] Step 102, the installation of the first monitoring element: in step 101, a plurality of first soil moisture measurement points are arranged at intervals in the horizontal direction and the vertical direction below the bottom of the foundation pit 1, and a plurality of first soil moisture measurement points are set at intervals. The first soil moisture meters 4 a...

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Abstract

The invention discloses a soaking load test method of a strip-shaped foundation model. The method comprises the steps of: (1) construction of the strip-shaped foundation model; (2) construction of a load platform; (3) load loading; (4) soaking of the strip-shaped foundation model; and (5) load unloading. The method is simple in steps, reasonable in design, convenient to realize and excellent in use effect; the strip-shaped foundation model is constructed in a constructed strip-shaped foundation research field; meanwhile, the installation of a monitoring element is finished to guarantee the foundation settlement standard, the ground surface settlement standard and accurate installation of a water moisture meter; and under load loading and soaking tests, the settlement of a strip-shaped foundation, the settlement of the ground surface and the volume water content of a collapsible soil layer can be accurately detected to provide reliable basis for construction of the strip-shaped foundation to be constructed.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering detection and testing, and in particular relates to a water immersion load test method of a strip foundation model. Background technique [0002] The strip foundation is a commonly used foundation form for multi-storey buildings. In areas where the collapsible soil layer is distributed, the collapsible soil layer will undergo collapsible settlement when it encounters water. The collapsible soil layer under the strip foundation is often used as a cushion Layer treatment to reduce foundation deformation and improve foundation bearing capacity. Cushion treatment is to excavate the collapsible soil of a certain width and thickness under the foundation of the building, lay the original soil excavated from the foundation pit or replace it with lime soil at the bottom of the foundation pit, backfill and compact it layer by layer. The design elevation serves as a cushion for the foundati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D33/00E02D1/00
CPCE02D1/00E02D33/00
Inventor 郑建国于永堂彭明刘争宏张继文胡伟彭君义唐国艺刘智王瑛廖燕宏夏玉云
Owner CHINA JK INST OF ENG INVESTIGATION & DESIGN
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