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Horizontal bottom sealing waterproofing testing device and method for foundation pit

A technology of horizontal back cover and test device, which is applied to measurement devices, instruments, scientific instruments, etc., can solve the problems of lack of water-proof model test of horizontal back cover of foundation pit, etc., and achieve the effect of reducing errors and numerical fluctuations.

Pending Publication Date: 2018-07-31
中交海峡建设投资发展有限公司 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the existing foundation pit dewatering model tests simulate vertical water-stop curtains and dewatering wells for dewatering, lack of model tests for foundation pit horizontal bottom sealing and water isolation, and horizontal bottom sealing and dewatering well dewatering have been widely used in construction sites at home and abroad

Method used

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  • Horizontal bottom sealing waterproofing testing device and method for foundation pit
  • Horizontal bottom sealing waterproofing testing device and method for foundation pit
  • Horizontal bottom sealing waterproofing testing device and method for foundation pit

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Embodiment Construction

[0045] Such as Figure 1-Figure 3 As shown, the test device of the present invention includes a model box 1, a booster pump 2, a water supply hole 3, an observation hole 4, a pressure gauge 5, a back cover material 6, a soil layer 7, a pressure measuring tube 8, a bellows 9, and a rigid foot 10 and other components. The model box 1 is a hollow cuboid without a cover, and the seams (corners) are reinforced by angle steel 11. Each aperture joint is sealed by a sealing ring 12, filtered by wire mesh and geotextile 13, so that it has good sealing and pressure bearing capacity.

[0046] The model box is made of 10mm thick plexiglass, and the corners of the model are reinforced and welded with angle steel. The whole model box is a cuboid steel box without a roof, and there are 20cm high stainless steel feet at the bottom.

[0047] The test steps are as follows:

[0048] The first step: filling soil and equipment installation. Fill soil layer by layer according to the specified g...

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Abstract

The invention discloses horizontal bottom sealing waterproofing testing device and method for a foundation pit. Different working conditions are set according to a bottom sealing material and the position, at a soil layer, of the bottom sealing material; water is supplied to the soil layer by using a boosting pump adjustable in water-supply pressure; the water-supply pressure of the boosting pumpis dynamically controlled until the bottom sealing material in each working condition is damaged. In order to search the changes of a water level and water pressure in a soil body, the inner side surface of a model casing is provided with a plurality of observation holes along a depth; joints of the observation holes are inserted into the soil layer, and form a communicating vessel; the change ofthe water pressure in the corresponding soil layer in the model casing is reflected through the reading of a pressure measuring gauge, which is connected with a pressure measuring pipe, on the left side, and through recording the change of the water pressure in the soil layer in each working condition and the water-supply pressure when the bottom sealing material is damaged, the influence rule ofeach parameter for the horizontal bottom sealing of the foundation pit is explored.

Description

technical field [0001] The invention relates to the field of foundation pit dewatering engineering, in particular to a foundation pit horizontal bottom sealing water-proof test device and method. Background technique [0002] As the development and utilization of urban underground space has become the trend of modern construction, some areas require large-scale precipitation during the excavation of foundation pits due to the abundance of groundwater hydraulics. Therefore, optimizing precipitation projects to improve precipitation efficiency, reduce precipitation costs and reduce precipitation The impact on the environment has become a hot issue in engineering construction at this stage. [0003] At present, there are more and more researches on indoor foundation pit dewatering model tests. For example, Tang Yiqun et al. designed a scaled-down precipitation model test to conduct a three-dimensional scaled-down simulation of the foundation pit of the end well at Yishan Road S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
CPCG01N33/00
Inventor 谭发茂张福宏施成华杨坤杨杰曹成勇蒋盛钢刘胜利王之扬
Owner 中交海峡建设投资发展有限公司
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