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A method for loosening sandy mudstone

A sandy mudstone and unified technology, applied in the field of sandy mud loosening soil, can solve the problems of high blasting cost, large safety hazards, and many procedures, and achieve the effect of increasing water content and reducing compressive strength

Active Publication Date: 2016-03-30
CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of sand-containing mud loosening method for excavating high-strength mudstone that makes full use of on-site resources and is efficient and safe in view of the problems of high blasting cost, many procedures, high cost, and large safety hazards in the prior art. method

Method used

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  • A method for loosening sandy mudstone
  • A method for loosening sandy mudstone

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Experimental program
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Effect test

Embodiment 1

[0032] As the strength of sandy mudstone increases with soaking time, the water content of sandy mudstone also increases, and the compressive strength decreases. Therefore, watering and soaking some sandy mudstone that cannot be loosened by loose soil can reduce its compressive strength. Strength, thus helping loose soil excavation.

[0033] The specific test method of sandy mud method is:

[0034] a. First, at the high-strength mudstone in the same area, take 10 sandy mudstone cylinders with a diameter of 15cm and a height of 10cm to 25cm. Cut the obtained sandy mudstone into 7 sandy mudstone cubes of 7×7×7cm for test piece;

[0035] b. Using the drying method, take two small test pieces, test piece c and test piece d, and place them in small aluminum cylinders respectively. The measured masses are 29.6g and 40.1g respectively, and add sufficient amount of After the alcohol stops burning and the cylinder cools down, the mass of test piece c and test piece d are measured to ...

Embodiment 3

[0045] The specific operation method of the sandy mud method is as follows:

[0046] First, water the area for 1 hour. If the water in this area is easy to lose from the surface of the mudstone when watering, you can simply make a cofferdam with a height of 15cm; then use a high-power backhoe excavator to install a single hook The ripper first loosens the sandy mudstone and then loads it out, forming a stepped construction; the high-strength sandy mudstone that cannot be loosened by the ripper is divided into three areas, the first area is sprinkled with water, and the second area is loosened by the ripper. Sandy mudstone and three-zone excavators are loaded and transported outside, and the construction is cyclical.

[0047] The construction technology in this construction method has completed the construction task quickly and effectively. The biggest feature of this construction method is that it is fully mechanically constructed, and the flow of water is parallel to the oper...

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Abstract

The invention relates to the technical field of sand containing mud rock earthworks, in particular to a sand containing mud loosening method. The strength of sand containing mud rocks is reduced along with increase of soaking time, the water content of the sand containing mud rocks is continuously increased, compressive strength is reduced, accordingly, some sand containing mud rocks which cannot be loosened are watered and soaked, the compressive strength of the sand containing mud rocks can be reduced, and loosening and digging are facilitated. Compared with the prior art, the sand containing mud loosening method has the advantages that construction is performed in a fully mechanized mode, underground water in a construction area is effectively used, high-strength sand containing mud rocks are watered, the water content of the sand containing mud rocks is increased, the compressive strength of the sand containing mud rocks is reduced, so that loosening and digging are facilitated, and the method is more environmentally friendly and safer as compared with blasting construction.

Description

[technical field] [0001] The invention relates to the technical field of sandy mudstone earthwork, in particular to a sandy mud loosening method. [Background technique] [0002] With the acceleration of urbanization and the development of the transportation industry, there are more and more railway projects, and the construction period is tight. During the process of laying the railway, it is necessary to excavate the roadbed, but during the excavation process, there will be limestone, granite, and mudstone that are difficult to Excavated sedimentary rock, mudstone is a kind of sedimentary rock solidified by mud and clay. Its composition is similar to that of shale but less brittle. Mudstone is relatively hard in a dry state, and its compressive strength and shear strength are comparable to those of limestone and granite. Similarly, rock grades can reach grades 4 to 5, and sandy mudstone soaked below the groundwater level for a long time will become very hard again when the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/00
Inventor 周如成潘留生王志宏陈哲红孙维轩吕致博武亚云孙曙王希聪
Owner CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD