Technical postings . . . The repair plan and technology of elevator well leakage are explained in detail.

Engineering Overview
Oriental Yuhong Building Repair Technical Engineer came to a Sanjia Hospital in Anhui Province, carried out a field survey on the leakage of the elevator shaft of the power center, and drew up a repair plan according to the specific situation of the site.
Exploitation survey
elevator well positive and negative zero leakage
elevator well positive and negative zero leakage
elevator well bottom has obvious water accumulation
cause analysis
elevator well positive and negative construction seam location leakage
The north side of the elevator shaft back is the road floor, the west side is the boiler room, rain water through the ground stone leakage to the construction seam position, through the gap leakage to the elevator shaft inside

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Exploitation at the bottom of the elevator well
When pouring the elevator shaft bottom plate and sidewall parts, the concrete vibration is not dense, resulting in honeycomb gaps in the base plate layer, groundwater pressure, groundwater leakage through the gap to the weak part of the waterproof layer to produce seepage
water seepage;
In the elevator well site bottom plate and side wall waterproof construction, coil construction joint edge did not do full bonding, coil and coil bonding site is not strict, groundwater from the base plate through the weak part of waterproof coil connection, penetration of waterproof protective layer leakage into the elevator shaft interior, elevator wells are generally not set up drainage system, year-round accumulation led to the accumulation of water in the elevator shaft.
metal components inside the elevator shaft are inflated by modification, resulting in a greater gap between the metal components and concrete, and groundwater seeps into the inside of the elevator shaft through the concrete gap, causing water to seep inside the elevator shaft.
Repair Program
1
Elevator Well Positive and Negative Construction Seam Position Repair Construction Process
Program Design: Injection and Back Defense
Eliminate the Elevator Well Positive and Negative Zero Position a circle of wall finish layer (putty powder layer and ash layer), eliminate the width of the positive and negative zero line as the center line The next 10 centimeths (the specific width is determined according to the actual situation on the site);
clean the construction seam and widen (to fill the sealing material);
punch the plum pile up and down the sides along the construction seam;
pre-buried slurry needle, through the high-pressure slurry injection equipment, the slurry material is pressed into the injection needle into the concrete interior;
the injection needle and seal the injection pinhole;
the root cleaning of the root
removal site, and the removal site is coated with rigid waterproof coating (strengthened with mesh cloth).
2
Leak repair and repair construction process at the bottom of the elevator well foundation pit
program design: plug the leak and back defense
communication with Party A, suspend the use of maintenance elevators, open elevator doors, set up safety fences;
elevator shaft bottom water and silt removal (hospital engineering department treatment);
clean the bottom of the elevator shaft and four weeks of wall ghee, shell concrete and dust;
check the seepage point, find out the leaking site and mark the
seepage point treatment:
(1) first use the outside of the structure solidified grout or deep slurry and other measures to maximize the blocking of seepage Water, or minimize the amount of water seepage, minimize the amount of water seepage diffusion, and then plug the water
(2) dot leakage with the plug 1 , directly plug the leak 1 , dry powder into the seepage hole, Pressing 1-2 minutes or so can plug the water
(3) cracks, construction seam leakage: in the leakage cracks or construction seam parts chisel "V" type groove (slot depth 10-20mm) and the groove particles, floating ash clean. The proper proportion of the leak-blocking 2 and water will be quickly stirred evenly, the slurry into the "V" groove, compaction of 2 minutes or so can block the water
wet substation: the elevator shaft structure foundation will need to be constructed with clean water first wet to wet saturation state and the surface of no water;
fine additional layer strengthening: cracks, construction seams on both sides of the 150mm range of the base surface brush stirred good anti-permeability 1 again, the middle plus fiberglass mesh cloth reinforced;
large-face brush construction: the use of brush or roller brush construction, construction should be completed in 2-3 times, thickness 2.0mm, brushing interval of 12 hours, should cross the direction back and forth brushing, appropriate sprinkler maintenance.
3
Elevator shaft inner wall
scheme design: back defense
using brush or roller brush construction back defense materials, construction should be completed in 2 times, thickness 1.0mm, brushing interval of 12 hours, should cross the direction back and forth brushing, appropriate sprinkler maintenance.
4
Metal components anti-rust treatment
cleaning the surface of internal metal components floating rust;
rust-staining treatment of metal components,
metal components overall anti-rust treatment.
above cases, only for elevator shaft maintenance examples, there are similar situations to learn from.
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