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Deep Foundation Pit Monitoring Cases

A project page for excavation safety monitoring: retaining-wall deep horizontal displacement, steel-support axial force, groundwater level, settlement and cloud-based alarms are handled as one data chain.

IPI · VW SENSOR · WATER LEVEL · CLOUD ALARM

2.96 mm/d

Warning Rate

Hangzhou Metro Chaowang Road station emergency warning used rate change as the key trigger.

8.87 mm

Cumulative Displacement

The representative ZQT1 point reached this cumulative value at 7.0 m depth.

180

Axial-Force Elements

Suzhou Rail Transit Line 5 Xingtangjie Station used 180 support-force elements.

16-Channel VW Boxes

One box per monitored section in the Xingtangjie station case.

Deep foundation pit at an urban construction site

Case scope

What SoilCreate Monitors On Site

Deep excavations fail through coupled mechanisms: retaining-wall movement, delayed support installation, groundwater drawdown, support-force redistribution and nearby settlement. SoilCreate treats these as one project rather than separate instruments. The in-place inclinometer provides high-frequency deep displacement curves; vibrating-wire terminals track support force and structural stress; water-level gauges confirm dewatering effects; the cloud platform links each threshold to the excavation stage.

✓
Retaining-wall profile, not only surface movement
IPI strings are installed in inclinometer casings so engineers see displacement by depth, including kick-foot and support-induced inflection shapes.
✓
Support-force monitoring during rapid construction
VW load cells and 16-channel terminals make support-force changes visible during concrete support and steel support stages.
✓
Alarm logic tied to excavation stage
The same displacement value can mean different risk at different stages; cloud thresholds are configured by rate, cumulative value and current construction state.

Data chain

Monitoring Chain Used On Site

Delivered projects are organized from monitoring targets to data quality, alarm rules and reporting outputs.

Retaining wall → IPI string → VW support force → Water level → Cloud alarm

Representative projects

Delivered Monitoring Cases

These cases focus on monitoring targets, sensor combinations and the data logic used after delivery.

Emergency Monitoring

Hangzhou Metro Line 3 Chaowang Road Station

From 2021-08-12, automated points CX4/CX5 were deployed for emergency monitoring. The ZQT1 warning point reached a 2.96 mm/d rate and 8.87 mm cumulative displacement at 7.0 m depth; the recommendation was to install steel support and apply axial force while increasing monitoring to at least twice per day.

Station Foundation Pit

Suzhou Rail Transit Line 5, Xingtangjie Station

SoilCreate delivered monitoring for the station foundation pit with 15 monitored sections, concrete and steel support layers, 180 axial-force elements, 15 sixteen-channel VW acquisition boxes, and inclinometer data uploaded to the cloud.

Tidal Response

Qingdao Jiaozhou Bay Second Subsea Tunnel Shield Pit

High-frequency pit monitoring captured periodic motion linked to tidal response. This is the type of slow, repeated signal that weekly manual measurement usually misses.

Implementation checklist

Delivery Checks Behind Reliable Data

The following checks are standard items in field delivery and long-term operation.

Delivery phase	Field check
Before installation	Confirm expected deformation direction, casing depth, support schedule and alarm thresholds.
During excavation	Watch displacement profile, rate change, support force, water level and construction event log together.
After alarm	Check physical construction state before interpreting the data as pure structural movement.