2.
(4) Importance, specification, buried depth, use and abandoned water supply and drainage pipelines of underground pipelines (including water supply, drainage, gas, heat, power supply, communication, fire fighting, etc.).
on which the foundation pit works are based.
Surrounding environmental conditions: (1) location relationship between adjacent buildings (structures), roads, underground pipelines and foundation pit works.
6.
(2) Engineering importance, number of floors, structural form, foundation form, foundation buried depth, plane layout of pile foundation or composite foundation reinforcement, pile length and other design parameters of adjacent buildings (structures), construction and completion time, structural integrity and service status.
2.
(3) Engineering hydrogeology: surface water, groundwater, formation permeability, groundwater recharge and discharge, etc.
Risk identification and classification: risk factor identification and foundation pit safety risk classification.
(2) Engineering geology: landform, formation lithology, adverse geological processes and geological disasters, special rock and soil, etc.
Responsible entities of all parties involved in the construction.
（2） Preparation basis 1 Legal basis: relevant laws, regulations, normative documents, standards, specifications, etc.
(4) Climatic characteristics and seasonal weather of the construction site.
Construction plane layout: the general construction plane layout (including temporary water, electricity, safe and civilized construction site requirements and identification of dangerous and large projects) and description of the foundation pit retaining structure construction and earthwork excavation stage, and the service conditions around the foundation pit.
（3） Construction plan 1 Construction schedule: the construction schedule of foundation pit works, which is specific to the schedule of each subdivisional project.
Foundation pit support, groundwater control and earth excavation design (including the layout of foundation pit support plane and section, construction dewatering, curtain water separation, earth excavation method and layout, and the relationship between earth excavation and bracing).
7.
(7) Condition of foundation pit works under construction or in use in adjacent areas.
3.
(5) Main bill of quantities.
3.
Construction methods and operation requirements: preparation before foundation pit construction, groundwater control, support construction, earthwork excavation and other process flow, key points, common problems and preventive and treatment measures.
4.
It is hereby printed and distributed to you.
Construction organization design, etc.
The section drawing shall mark the buried depth of adjacent buildings (structures), the purpose, material, pipe diameter, buried depth, etc.
2.
(5) The environmental plan shall indicate the plane relationship and dimensions with the project.
Technical measures: safety assurance measures, quality and technical assurance measures, civilized construction assurance measures, environmental protection measures, seasonal construction assurance measures, etc.
4.
3.
General Office of the Ministry of housing and urban rural development December 8, 2021 (this document is voluntarily disclosed) Annex 1: guidelines for the preparation of special construction schemes for divisional and subdivisional works with high risk; guidelines for the preparation of special construction schemes for divisional and subdivisional works with high risk; I.
（4） Construction technology 1 Technical parameters: supporting structure construction, dewatering, curtain, key equipment and other technical parameters.
Inspection requirements: mobilization quality inspection and sampling inspection of materials used in foundation pit engineering, inspection contents and standards of each process during foundation pit construction.
Li Jianke’s reading of the thinking guide is only a reference, and the legal risk will not be avoided or reduced because of the guide.
Construction requirements: specify the quality and safety objectives, construction period requirements (commencement date and planned completion date of the project), planned commencement date and planned completion date of foundation pit engineering.
Project documents: construction contract (construction contracting mode), survey documents, foundation pit design and construction drawings, current terrain and influence range, pipeline detection or query data, relevant design documents, geological disaster risk assessment report, relevant regulations of the owner, pipeline drawings, etc.
2.
Process flow: general construction process flow of foundation pit engineering and process flow of subdivisional works.
（5） Construction assurance measures 1 Organizational guarantee measures: safety organization, safety assurance system and safety responsibilities of corresponding personnel, etc.
3.
overview of foundation pit works (I) 1 Overview and characteristics of foundation pit engineering: (1) basic information of the project: perimeter, area, excavation depth, design safety grade of foundation pit support, design service life of foundation pit, etc.
(8) Structures such as adjacent high-voltage line towers and signal towers and their height limit and connection distance to construction equipment.
2.
When the conditions are complex, it shall also draw a section drawing and mark the section line and section number.
Monitoring measures: monitoring organization, monitoring scope, monitoring items, monitoring methods, monitoring frequency, early warning value and control value, patrol inspection, information feedback, layout of monitoring points, etc..
5.
Material and equipment plan, etc.: mechanical equipment configuration, demand plan for main materials and revolving materials, input plan for main materials, mechanical property requirements, detailed requirements for sampling and retest, and test plan.
Labor plan.
Circular of the general office of the Ministry of housing and urban rural development on printing and distributing the guidelines for the preparation of special construction schemes for divisional and subdivisional works with high risks, the housing and urban rural development departments of all provinces and autonomous regions and the housing and urban rural development (Management) Commission of municipalities directly under the central government, Housing and Urban Rural Development Bureau of Xinjiang production and Construction Corps: in order to further strengthen and standardize the safety management of dangerous divisional and subdivisional works in housing construction and municipal infrastructure projects, and improve the safety production level of housing construction and municipal infrastructure projects, our department organized and compiled the preparation guide for special construction scheme of dangerous divisional and subdivisional works.
3.
Therefore, the relevant entities must specify a detailed, complete and rigorous scheme according to the actual reference guidelines.
Please refer to the actual situation.
(3) Importance, characteristics and usage of adjacent roads.
(6) Near rivers, lakes, canals, dams and other locations, historical data shall be consulted to clarify the water level height in flood season and analyze the possible impact on foundation pit.
