Site Investigation Report on the Construction Site of Heavy Timber House in Yunnan

By: wordpress51

1. Project Overview

This project is the construction of the “Heavy Timber House in Yunnan”, located in a natural area with dense vegetation and undulating terrain in Yunnan. With the concept of “integrating into nature and low-carbon construction”, it plans to build a heavy timber house with both residential and leisure functions, making full use of the natural landscape resources of the site to achieve harmonious coexistence between the building and the environment.

2. Analysis of On-site Status

1. Topography and Landform

As can be seen from the aerial photo, the site terrain is characterized by interlaced gentle slopes and flatlands, with grasslands and woodlands embedded in each other. The area has both open grassland areas and densely forested areas. The undulating terrain provides conditions for creating a staggered space for the heavy timber house, but it also puts forward higher requirements for the flatness control of foundation construction.

2. Vegetation and Ecology

The site has a high vegetation coverage rate, with rich tree species (specific tree species need to be confirmed by subsequent field investigation) and well-growing grasslands. The existence of a large number of native vegetation not only provides a natural landscape background for the project, but also requires attention to ecological protection during the construction process to avoid excessive damage to the native plant community.

3. Traffic Conditions

There are multiple dirt roads running through the site. Among them, the red soil road on the right is relatively wide and can be used as the main transportation channel for construction materials; the winding path on the left can assist the passage of small equipment or personnel. The existing roads can basically meet the initial construction traffic needs, but some sections need to be temporarily reinforced to adapt to the load of transport vehicles for large building materials (such as large-sized wooden components) of the heavy timber house.

4. Temporary Facilities

The small blue building in the middle of the site can be used as a temporary office or material storage place during the construction period, reducing the secondary construction of temporary facilities, saving costs and reducing additional interference to the environment.

3. Suggestions for Construction Preparation

1. Preliminary Survey Work

Carry out topographic surveying and mapping and geological exploration to accurately grasp the site elevation, slope and soil structure, and provide data support for the foundation design and foundation construction of the heavy timber house (the heavy timber house has a large load, so the foundation treatment needs to be particularly rigorous) to ensure the stability of the building structure.
Conduct a vegetation census, delineate the “protected vegetation area” and “available/transplantable area”, and formulate a vegetation protection plan to retain the original green landscape to the greatest extent.

2. Construction Road Planning

Temporarily reinforce the existing main dirt roads (such as laying gravel layers) to ensure the traffic efficiency of heavy building material transport vehicles; clear and sort out the secondary paths to meet the passage of construction personnel and small equipment.
Plan temporary drainage facilities during the construction period, especially in the red soil area (prone to rain erosion), set up drainage ditches or sand sedimentation tanks to avoid soil erosion and road muddiness, and ensure the road traffic capacity during the construction period.

3. Material Entry and Temporary Facilities

Combined with the characteristics of high prefabrication degree and large component size of the heavy timber house, plan the entry route and stacking area of prefabricated components in advance, and use the space around the existing temporary buildings as a material storage point to reduce secondary handling (it is necessary to focus on confirming the feasibility of the hoisting and transportation path of large components).
Carry out safety inspection and functional transformation on the existing blue temporary building to make it meet the needs of construction office and tool storage, and reduce the impact of temporary facility construction on the environment.

4. Environmental Impact Assessment and Countermeasures

1. Potential Impacts

Vegetation Damage: If the native vegetation is not properly protected during the construction process, it is easy to cause damage to the local ecological landscape.
Soil Erosion: The red soil area is prone to soil erosion under rain erosion, affecting the surrounding ecology and road traffic.
Noise Interference: Construction machinery operations (especially heavy equipment) may disturb wild animals in the area (if any).

2. Countermeasures

Strictly implement the vegetation protection plan, delineate the construction red line, and strictly prohibit operations beyond the scope; do a good job in the maintenance of transplanted vegetation to ensure the survival rate.
During the construction period, set up retaining walls and grassed ditches at the edge of the red soil area, and complete vegetation restoration or coverage before the rainy season to effectively control soil erosion.
Arrange the construction time reasonably, select low-noise construction equipment to reduce noise interference to the surrounding ecology; if night construction is involved, it is necessary to evaluate in advance and go through relevant permits.

5. Subsequent Work Plan

Preliminary Preparation Stage (March 2026 – April 2026)

Complete topographic surveying, geological exploration, vegetation census, prepare construction organization design and ecological protection plan, and go through construction procedures; simultaneously connect with heavy timber house prefabricated component manufacturers to confirm production and transportation plans.
Foundation Construction Stage (May 2026 – June 2026)

Carry out foundation excavation and foundation pouring based on survey data, and simultaneously promote the reinforcement of construction roads and the construction of temporary drainage facilities; during this period, complete the entry of heavy equipment and the layout of temporary power and water pipelines.
Main Structure Construction Stage (July 2026 – September 2026)

The prefabricated components of the heavy timber house enter the site, are hoisted and assembled, and the greening around the building (maintenance of vegetation in the reserved area) is carried out simultaneously; focus on controlling the splicing accuracy and structural stability of wooden components.
Decoration and Finalization Stage (October 2026 – November 2026)

Complete the interior decoration of the wooden house and the installation of supporting facilities, carry out site cleaning, vegetation restoration and completion acceptance; finally deliver the Yunnan heavy timber house project that conforms to the concept of “coexistence of ecology and architecture”.

This report is formed based on on-site aerial photos and preliminary analysis. It needs to be further improved in combination with field investigation and detailed design to ensure that the project construction is scientific, environmentally friendly and efficient, and ultimately achieve the construction goal of “deep integration of the Yunnan heavy timber house and the natural environment”.