Drainage plate installation method

Abstract

The invention discloses a method for laying drainage plates, specifically comprising the following steps: deploying a positioning grid for the drainage plates on the surface of the soft soils to be treated, and using RTK-GPS positioning equipment to control the planar coordinates; using a tracked plate-driving machine to drive the drainage plates, installing a biaxial tilt sensor on the mast of the plate-driving machine, and adjusting the verticality of the mast in real time via a servo-hydraulic mechanism; stopping the driving when the lower end of the drainage plate penetrates the bearing layer to a depth of 500 to 800 mm, maintaining an exposure length of the upper end of 400 mm to 500 mm, and controlling the spacing between the centers of adjacent drainage plates between 0.8 m and 1.2 m;Lay a waterproofing membrane over the area where the drainage plates are located, leaving exposed ends for the drainage plates, connect filter pipes along the exposed ends of the drainage plates, and connect the filter pipes to the drainage plates using push-fit rubber fittings; install a vacuum pump unit and connect a vacuum level sensor; cover the surface of the waterproofing membrane with a protective layer of medium to coarse sand. The invention allows for precise control of the drainage plate installation process, improves the quality and efficiency of construction, and reduces labor costs.

Description

2 An objective of the present invention is to provide a method for laying drainage plates, capable of precisely controlling the process of laying drainage plates, improving the quality and efficiency of construction and reducing the cost of labor. In order to achieve these objectives and other advantages of the present invention, according to one aspect thereof, the present invention provides the following technical solution: A method for laying drainage plates, comprising the following steps: deploying a positioning grid for the drainage plates on the surface of the soils to be treated, and using RTK-GPS positioning equipment to control the planar coordinates; using a 10-track plate-driving machine to drive the drainage plates, mounting a biaxial tilt sensor on the mast of the plate-driving machine, and adjusting the verticality of the mast in real time by means of a servo-hydraulic mechanism,so that the vertical deviation of the drainage plates is less than 1.5%; stop the insertion when the depth at which the lower end 15 of the drainage plate penetrates the load-bearing layer reaches 500 to 800 mm, maintain an exposed length of the upper end of 400 to 500 mm, and control the spacing between the centers of adjacent drainage plates to 0.8 m to 1.2 m; lay a waterproofing membrane over the area of ​​the drainage plates and reserve exposed ends for them, connect filter pipes along 20 of the exposed ends of the drainage plates, and connect the filter pipes to the drainage plates by means of push-fit rubber fittings; install a vacuum pump unit and connect a sensor degree of vacuum, and automatically start the emergency vacuum pump unit when the degree of vacuum under the membrane is less than 80 kPa; cover the surface of the sealing membrane with a protective layer of medium to coarse sand, the thickness of the sand layer being 300 mm to 400 mm and the size of the sand grains being 0.5 mm to 5 mm. Furthermore,According to static soil penetration test data for soft soils, the bearing capacity difference zones are divided: high compressibility zones adopt a denser spacing of 0.8 m, medium compressibility zones a spacing of 1.0 m, and low compressibility zones a wider spacing of 1.2 m; the grid parameters are imported into the RTK-GPS navigation system of the plate-driving machine. The dual-frequency receiver, placed in the direction of travel of the machine, receives satellite signals in real time, and combined with laser scanning data of the ground surface elevation, a 3D navigation interface for construction is generated on the on-board terminal, correcting 5 dynamically adjusts the planar coordinate deviation to ≤15mm; each time the plate-driving machine finishes driving a drainage plate, it automatically generates an encrypted data packet including the coordinates of the driving point, the driving time, the amount of verticality correction, and the soil layer resistance curve.then on the 10th, upload to the cloud-based construction management platform. In addition, static penetration sounding tests are conducted on a 10m × 10m grid in the construction area to obtain the distribution cloud of the resistance value at the qc point; depending on the qc value, the soil is divided into three types of zones: high compressibility zone (qc ≤ 0.5 MPa), where the drainage plates are arranged in an equilateral triangle with a center spacing of 0.8 m ± 0.05 m; medium compressibility zone (0.5 MPa < qc ≤ 1.0 MPa), where the drainage plates are arranged in a square grid with a center spacing of 1.0 m ± 0.05 m; low compressibility zone (qc > 1.0 MPa), where the drainage plates are arranged in a plum-flower grid with a 20 spacing between centers of 1.2m ± 0.05m; the plate-driving machine is equipped with a dual-frequency RTK-GPS module and a ground laser scanner, which captures real-time elevation data of the construction surface, combines the data from the machine's tilt sensor to calculate the amount of track settlement compensation ΔS,deduces planar coordinates (X,Y) based on the dual-frequency RTK signal, superimposes ΔS to perform a three-dimensional correction of the coordinates and generate a dynamic navigation trajectory; when the real-time positioning error exceeds the threshold, the servo-hydraulic system of the plate-driving machine is triggered to adjust the position of the machine body until the error is ≤ the defined threshold. Furthermore, biaxial tilt sensors are installed respectively at the top and bottom of the mast of the plate-driving machine, simultaneously collecting the BE2025 / 5811 4 tilt angles θ₁ and θ₂ of the X and Y axes of the mast at a frequency of 200 Hz; the difference in mast bending deformation Δθ = |θ₁-θ₂| is calculated, and when Δθ ≥ 0.1°, a stop alarm is triggered and a mechanical failure diagnostic report for the mast is generated; depending on the resistance value at the point at qc acquired, the parameters of the hydraulic servo-mechanism are adjusted according to the following rules: for the soft soil layer (qc ≤ 0.5 MPa): the rate of response of the verin hydraulic flow is set at 0.8 m / s.and the single correction stroke is ≤5mm; for the soldur layer (qc>0.5MPa): the hydraulic valve response velocity is set to 1.2m / s, and the single correction stroke is ≤3mm; the target direction and correction stroke are calculated on the basis of the real-time inclination angles θ₁ and θ₂, controlling the action of the servo-hydraulic mechanism to make the verticality deviation of the mast converge to ≤1.5% in 0.5 seconds. Furthermore, the data is measured simultaneously by biaxial tilt sensors installed at the top and bottom of the mast, in order to construct a model of the mast's spatial offsets: the tilt angles of the upper X and Y axes of the sensor are converted into a horizontal offset referenced to the effective height of the mast, while the tilt angles of the lower X and Y axes of the sensor are used to calculate the local offset component according to its installation position; by comparing the result of the vector decomposition of the upper and lower offsets, when the global offset reaches 1.5% of the effective height of the mast,A 20-level three-stage correction is implemented: Coarse adjustment stage: dynamically adjust the hydraulic cylinder's forward speed based on the phase difference of the inclination angle and the soil's qc value classification. Fine adjustment stage: predict the movement trajectory by combining historical mast vibration data and perform a stroke correction at the millimeter level through anticipatory action compensation. Lockout stage: call the laser scanning device of the plate-driving machine to verify verticality and trigger the automatic locking of the hydraulic system when three consecutive measurements are all less than 1.5%. Furthermore, for areas with high compressibility, the embedment depth of the BE2025 / 5811 5 drainage plates is set at 800mm±50mm, and the exposure length of the upper end is maintained at 500mm±20mm; for areas with medium compressibility, the embedment depth is set at 650mm±50mm,and the exposure length of the upper end is kept at 450mm±20mm; for low compressibility zones, the penetration depth is set at 5,500mm±50mm, and the exposure length of the upper end is kept at 400mm±20mm; penetration is stopped when the penetration resistance of the plate driving machine reaches 120% of the threshold qcd of the zone in progress. Furthermore, based on the grid generated by RTK-GPS positioning, PE sealing membranes are laid in sections, and the overlapping areas of adjacent membranes are welded using hot air welding equipment to form a continuous weld bead; the extended sealing ring of the interlocking rubber fitting is bonded to the outer wall of the drainage plate using hot melt adhesive, forming a watertight structure enveloping the exposed end of the drainage plate, and the interlocking rubber fitting is fitted with interference against the outer wall of the drainage plate; after completion of the sealing,A negative pressure is applied by the vacuum pump group, and the seal is deemed compliant when the vacuum degree data is stable above 80 kPa. Furthermore, a main vacuum pump group is positioned at the limits of the sealing membrane, its total suction flow rate being adapted to the total length of the filter pipes; a backup vacuum pump group is installed on the raised vehicle of the plate-driving machine, with a suction capacity of 120% of that of the main group; a vacuum degree sensor is installed at the filter pipe connection point, with a measurement range of 0 to 100 kPa, and its data is uploaded in real time to the cloud-based construction management platform; the backup vacuum pump group is activated automatically. when the degree of vacuum in the zone is less than 80 kPa for a predefined period.30 In addition, medium to coarse sand is spread uniformly using a loader, the thickness of the sand layer being controlled between 300 mm and 400 mm, and the size of the sand grains being 0,5mm to 5mm; a BE2025 / 5811 6 vibrating roller is used to perform alternating compression on the sand layer, with 3 to 5 compaction passes; after compaction, the compaction of the sand layer is detected by the sampling cylinder method, and the dry density is checked at ≥1.7g / cm3; a geotextile is laid on the surface of the sand layer to prevent subsequent construction machinery from damaging it by direct compaction. The present invention has at least the following beneficial effects. Thanks to the RTK-GP positioning equipment and dual-frequency receiver, combined with laser scanning data of ground surface elevation, the present invention can dynamically correct the planar coordinate deviation to 10 ≤ 15 mm, making the distribution of drainage plates more uniform and effectively improving the soil consolidation effect; a biaxial tilt sensor is installed on the mast, associated with a servo-hydraulic mechanism, which can rapidly converge the verticality deviation of the mast to ≤ 1.5%,reducing the phenomena of slab breakage and siltation, and guaranteeing the effective drainage length of the slabs; areas with differing bearing capacity are divided according to static sounding test data for soft soil penetration, and different spacings and penetration depths are adopted for areas of varying compressibility, which improves both drainage efficiency in areas of high compressibility and avoids resource depletion in areas of low compressibility; the present invention allows precise control of the installation of drainage slabs, improves the quality and efficiency of construction, and reduces labor costs. Other advantages, objectives, and features of the present invention will become apparent in part from the following description,and in part will be understood by a person skilled in the art through research and practice of the present invention. Brief description of the drawings [Fig. 1] Figure 1 is a flow diagram of one embodiment of the present application. Description of embodiments 30 With reference to the drawings below, the present invention will be described in more detail so that technical personnel skilled in the art can implement it with reference to BE2025 / 5811 7 to the text of the description. It should be understood that terms such as “have”, “include” and “include” used in the implementation examples of this application do not exclude the presence or addition of one or more other elements or a combination thereof. All directional indicators (such as up, down, left, right, forward, backward...) in the implementation examples of this application serve only to explain the relative position, the state of movement, etc., between the different components in a specific position; if this specific position changes,The directional indicators are modified accordingly. When an element is described as “attached to” or “arranged on” another element, it may be directly on the other element or there may be an intermediate element between them. When an element is said to be “connected” to another element, it may be connected directly to the other element or indirectly through an intermediate element. The descriptions relating to “first”, “second”, etc., in the implementation examples of this application are for descriptive purposes only and should not be interpreted as indicating or implying relative importance or as implicitly indicating the number of technical features concerned. Consequently, features with “first” or “second” may explicitly or implicitly include at least one of these features. It should be noted that the technical solutions among the different examples of implementation of this request can be combined with each other,provided they are feasible for a person skilled in the ordinary trade. When the combination of technical solutions becomes mutually contradictory or impractical, this combination of technical solutions is considered not to exist and is not included in the scope of protection claimed by this application. As illustrated,