Electrochemical non-destructive repairing method for weak structural surface of ancient city wall

Abstract

The invention discloses an electrochemical non-destructive repairing method for a weak structural surface of an ancient city wall. The method comprises the following steps that A, wall bricks at parts, on the two sides of a sliding crack surface, of the top of the city wall are removed to expose a rammed earth layer; B. an anode electrode tube and a cathode electrode tube are separately inserted into the part, near the sliding crack surface, of the rammed earth layer, wherein the anode electrode tube and the cathode electrode tube are separately connected to a DC power supply through wires; C.CaCl2 grout is injected into the position, located at one side of the sliding crack surface, of the rammed earth layer by a grouting device; D. the DC power supply is turned on to begin electroosmosis, water in the rammed earth layer enters the cathode electrode tube through a water permeable hole of the wall of the cathode electrode tube, and at this time, a water pumping device starts to pump water in the cathode electrode tube; E electroosmosis is stopped until continuous calcium salt precipitation is formed between the anode electrode tube and the cathode electrode tube; and F, the anodeelectrode tube is moved to an extension line of a position connection line of an original cathode electrode tube and an original positive electrode tube, positive and negative interfaces of the powersupply are exchanged, and the steps from C to E are repeated. Non-destructive repair on the weak structural surface of the ancient city wall is achieved.

Description

technical field [0001] The invention relates to an ancient city wall repair method, in particular to an electrochemical non-destructive repair method for the weak structural surface of the ancient city wall. Background technique [0002] The city wall is an architectural structure that protected the city in ancient times, and it is preserved as a precious cultural relic in modern times. The ancient city wall is actually a kind of rammed earth wall, in order to protect the rammed earth or add a layer of bricks on the outside, such as the Ming city walls in Nanjing and Xi'an. Due to the long history, accumulated rainwater and poor drainage, the shear strength of the soil inside the city wall is reduced, and some weak structural surfaces appear, such as slip zones, which are manifested as obvious outward protrusion of the wall or cracking and peeling of the outer wall, etc. . If it is not repaired in time, the unstable soil will slide completely along the weak structural surf...

AI Technical Summary

Problems solved by technology

If it is not repaired in time, the unstable soil will completely slide along the weak structural surface, causing irreversible damage to the city wall structure

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