Grout plant for tunnel lining

A diesel cement grout injection pump is a device that uses a diesel engine as a power source to inject cement grout or other grouting materials into strata, fissures, or structures. It mainly consists of a power system, a pumping system, a mixing system, and a control system, and features high pressure, large flow rate, and strong adaptability.

In underground mines, grout mixing equipment is a key piece of equipment used to prepare grouting materials. It mixes solid materials (such as cement, loess, fly ash, etc.) with water in a certain proportion to form a uniform slurry that meets the required concentration, which can be used for mine fire prevention and extinguishing, goaf backfilling, roadway reinforcement and other projects.

A hydraulic high-pressure horizontal cement grouting pump is a specialized device driven by a hydraulic system to inject cement slurry and other readily setting materials into rock formations, soil cracks, or gaps in building structures at high pressure. The core principle is based on hydraulic transmission and the reciprocating motion of a plunger:
Hydraulic drive: An electric motor drives a gear pump, which delivers high-pressure oil through a relief valve and into a hydraulic reversing valve block, controlling the reciprocating motion of the hydraulic cylinder.
Synchronized grouting: The hydraulic cylinder and the working cylinder move synchronously, with suction and discharge valves at each end. This allows for single-liquid or dual-liquid grouting (e.g., a mixture of cement slurry and water glass).

A cement bentonite grout mixing plant is a specialized system designed to produce homogeneous, stable slurries used primarily in geotechnical and civil engineering applications such as: Slurry walls (diaphragm walls), groundwater cutoff, tunneling and shaft sealing, landfill containment barriers, and soil nailing and ground improvement. Working Principle: Premixing Stage: Bentonite and water are thoroughly dispersed under low-speed stirring to form a colloidal solution.
Main Mixing Stage: Cement and additives are added, and homogeneous mixing is achieved through high-speed shear mixing.
Transportation and Storage: The mixed slurry is transported to the construction site via a pumping system or temporarily stored in mixing tanks to maintain its fluidity.

This integrated grouting plant is specifically designed for shield/TBM tunnel segment lining. It combines a high-speed grouting tank, a grout storage and mixing tank, and a high-pressure grouting pump into one unit. During tunnel excavation, it prepares cement/bentonite grout to fill the annular gap (annular gap) between the lining segments and the surrounding rock.

Grouting pumps inject cement-based or chemical grout into foundation cracks, pores, or weak layers under high pressure, forming a solidified mass to enhance the foundation’s bearing capacity. Its reinforcement principles encompass the following aspects:
Permeation consolidation: The grout fills soil pores, increasing density through cementation; suitable for highly permeable strata such as sandy soil and silt.
Fracturing reinforcement: High-pressure grout fractures the soil, forming a dendritic grout vein network, improving the overall strength of the foundation; commonly used for soft clay or collapsible loess.
Compaction grouting: High-pressure compaction of the surrounding soil creates a dense zone; suitable for saturated soft clay or artificial fill.

The grout pump and mixing station is an integrated device combining a mixer, mixing tank, and grouting pump. It injects cement-based or chemical grout into strata, structural fissures, or soil and rock masses under high pressure to achieve reinforcement, seepage prevention, or filling functions. Its working principle can be divided into three stages:
1. Cement grout preparation: A high-speed vortex mixer rapidly mixes cement, bentonite, and water, forming a homogeneous grout within 10 seconds, preventing particle sedimentation.
2. Cement grout storage: The mixing tank continuously agitates the grout to prevent solidification and ensure a continuous supply.
3. High-pressure grouting: A hydraulically driven pump generates high pressure through piston or plunger movement, injecting the grout into the target area. The pressure range is 0-45 Bar (some models reach 0-100 Bar), and the flow rate is 0-100 L/min.

A high-pressure cement grouting pump is an industrial device that delivers cement grout (or chemical grout) under high pressure. It is widely used in engineering fields such as foundation reinforcement, seepage prevention and plugging, and structural reinforcement. Its core function is to inject grout under high pressure to fill voids in soil or concrete structures, forming a stable composite structure and improving the load-bearing capacity and durability of the project.

The Compact Grout Mixer and Pump is an integrated equipment that combines mixing and grouting functions. It is specifically designed for confined spaces, small-scale projects, or mobile operations. Its core features include a compact structure (typically occupying less than 5 square meters) and easy operation (can be operated by a single person), enabling seamless integration of grout preparation and high-pressure delivery. Typical applications include building repairs, small-scale foundation reinforcement, and localized tunnel seepage prevention, making it particularly suitable for construction environments where traditional large equipment is difficult to access.

Inverter speed high-pressure grouting machines eliminate the need for mechanical gearboxes, clutches, and other easily faulty transmission components, resulting in smaller pump size and lighter weight. They are compact in structure and highly reliable.

High-pressure grouting pumps, based on high-pressure jet grouting technology, are used in drilling rig applications to achieve foundation reinforcement through the coordinated operation of the high-pressure pump and the drilling rig.

The medium-pressure cement grouting pump features a single-piston, double-acting design with a gear reducer, a compact structure, and is suitable for medium-scale grouting projects such as soil nailing and anchor bolting. Typical applications include:
1. Foundation reinforcement: Injecting cement grout into soft soil foundations to improve bearing capacity and prevent settlement.
2. Tunnels and underground engineering: Used for filling voids behind tunnel linings, reinforcing rock strata, and waterproofing.
3. Slope stabilization: Grouting and reinforcing landslides or unstable rock strata to enhance slope stability.
4. Concrete structure repair: Repairing defects such as cracks and hollow areas to improve structural durability.
5. Water conservancy projects: Construction of dam anti-seepage walls, dam reinforcement, and foundation treatment.

A high-pressure vertical grout pump is a specialized positive displacement pump designed to inject grout (a mixture of cement, water, and often additives) into cracks, voids, and fissures under high pressure. Applications: Soil nailing & ground stabilization. Tunneling and mining grouting. Dam and foundation repair. Post-tensioning duct grouting. Void filling beneath slabs or structures.

The main applications of cement grout pump stations include:
Foundation reinforcement: Grouting for foundations in dams, tunnels, mines, etc., to improve bearing capacity.
Structural repair: Reinforcement of buildings and bridges, foundation lifting, soil compaction grouting, etc.
Underground engineering: Tunnel lining, contact grouting, and tunnel waterproofing.
Marine engineering: Underwater foundations, wharf scour protection, shoreline reinforcement, etc.

A vertical injection grout pump is a high-pressure grouting device specifically designed for vertical grouting operations. Its core function is to precisely inject grout (such as cement grout, chemical grout, etc.) into foundations, soil layers, or building cracks using high pressure to achieve engineering purposes such as reinforcement, seepage prevention, and leak sealing.