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Roadbed structure penetrating through active fault and construction method thereof

A technology for active faults and subgrades, applied in roads, roads, buildings, etc., can solve the problems of subgrade structure cracking, inability to adapt to the horizontal deformation of active strike-slip faults, and large impact on subgrade structures, so as to reduce engineering costs and shorten passenger and freight time. , to avoid the effect of long-distance evasion

Active Publication Date: 2020-08-25
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a roadbed structure crossing active faults and its construction method in view of the problem that the prior art roadbed structure is greatly affected by ground movement and cannot adapt to the large horizontal deformation caused by active strike-slip faults. Crossing active faults, avoiding subgrade structure cracking and track deformation

Method used

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  • Roadbed structure penetrating through active fault and construction method thereof
  • Roadbed structure penetrating through active fault and construction method thereof
  • Roadbed structure penetrating through active fault and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A subgrade structure that crosses active faults, such as Figure 2-Figure 7 , from top to bottom are subgrade filling body 1, top plate 2, slip layer 3, bottom plate 4 and cushion layer 5.

[0041] Lay the cushion layer 5 structure on the broken plate 6 of the active fault zone. The cushion layer 5 is filled with qualified subgrade filler, the thickness is not less than 0.3m, and the top surface of the cushion layer 5 is at the same height for laying the bottom plate 4.

[0042] The bottom plate 4 is located on the cushion layer 5 and is made of reinforced concrete; along the longitudinal direction of the line, the bottom plate 4 is broken at intervals of 5m, leaving deformation joints to adapt to ground movement and deformation, and to prevent the bottom plate 4 from being sheared by earthquake force. The bottom plate 4 is not less than 3m beyond the lateral length of the roadbed filling body 1 on the upstream side of the strike-slip fault sliding direction, and not le...

Embodiment 2

[0052] Based on Embodiment 1, this embodiment provides a construction method for a shock-absorbing and isolating subgrade structure that crosses active strike-slip faults. The construction steps are as follows:

[0053] S1. Clean up the planting soil on the surface and level the site;

[0054] S2. Lay the cushion layer 5 according to the terrain, and the thickness of the cushion layer 5 is not less than 0.3m;

[0055] S3, cast the bottom plate 4 in the vertical mold, smear the adhesive 34 on the bottom plate 4, and paste the polytetrafluoroethylene plate;

[0056] S4, apply lubricant 33 on the top of the polytetrafluoroethylene plate, and lay a stainless steel plate above the lubricant 33;

[0057] S5, vertical mold pouring roof 2 above the stainless steel plate;

[0058] S6, reserve through holes 71 on both sides of the top plate 2 and the bottom plate 4, insert HPB300 steel bars 72 in the through holes 71, and grout around the steel bars 72 to form the limit key 7;

[005...

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Abstract

The invention relates to the field of roadbed structures, and particularly relates to a roadbed structure penetrating through an active fault and a construction method thereof. The roadbed structure comprises a filling body. A top plate and a bottom plate are sequentially arranged at the bottom of the filling body and smoothly connected, the bottom plate is fixed to a broken disc, and the top plate and the bottom plate are fixedly connected through a limiting key. The roadbed filling body is separated from ground movement possibly causing damage as much as possible by the top plate and the bottom plate so that the roadbed structure is prevented from cracking or causing rail deformation due to direct influence of the ground movement, and an anti-seismic property of the roadbed structure isimproved. The top plate and the bottom plate are limited through the limiting key, but when a strike-slip fault carries out a dislocation activity or seismic intensity exceeds a certain threshold value, the limiting key is broken, a limiting function is lost, a relatively fixed state of the top plate and the bottom plate is broken, a sliding mechanism is started, and the broken disc drives the bottom plate to horizontally move relative to the top plate to adapt to active fault movement.

Description

technical field [0001] The invention relates to the field of roadbed structures, in particular to a roadbed structure crossing active faults and a construction method thereof. Background technique [0002] A fault is a fault structure in which the rock blocks on both sides of the fracture surface have significant relative displacement. According to the nature of fault displacement, faults can be divided into strike-slip faults and dip-slip faults, where strike-slip faults refer to faults in which rock blocks move in opposite horizontal directions. Earthquakes are closely related to faults. The occurrence of earthquakes has contributed to the generation and development of faults. Faults that have moved in the past but are now stable are called dormant faults. Usually, the faults that have experienced relatively strong seismic activity in the modern geological period (10,000 years) or are currently active, and may continue to be active in the future (the next 100 years) are d...

Claims

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Application Information

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IPC IPC(8): E01C3/00E01C3/04
CPCE01C3/00E01C3/04
Inventor 张东卿薛元刘菀茹李安洪王智猛周波张建文沈均周文洋付正道李睿肖杭
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD