9329results about "Foundation engineering" patented technology

The invention provides a method for evaluating the grouting water control effect of an underground water-sealed cave depot project. The method comprises the steps that firstly, grouting and geological parameters and hydrological monitoring data of a project area are obtained; establishing a three-dimensional seepage-grouting coupling model, and simulating the dynamic state of a seepage field by using a finite element analysis algorithm; then calculating the equivalent permeability change rate of the grouting affected zone based on a simulation result; constructing an evaluation index system, and performing quantitative evaluation by using a fuzzy comprehensive evaluation algorithm; and finally, generating a grouting parameter dynamic adjustment scheme according to an evaluation result. According to the method, scientific and accurate evaluation and engineering optimization of the grouting water control effect can be achieved, and the safety and economical efficiency of engineering are improved.

The invention discloses a cavity type mixed tower fan foundation formwork construction method. Comprising the steps of cushion layer pouring, pay-off, cavity foundation slab steel bar binding, annular support system erecting, foundation lower inner formwork supporting and inner support frame body arranging, cantilever anchoring end bottom formwork frame body supporting, cantilever anchoring end bottom formwork installing, foundation upper inner formwork supporting and inner support arranging, anchor backing plate and prestressed pipe installing, steel bar binding and annular support system erecting. And a foundation outer formwork is installed. Compared with the prior art, formwork erecting is formed at a time, a foundation is integrally poured, and the overall construction quality is guaranteed; the problem of leakage caused by two-time pouring of a construction joint part is avoided, water stop steel plates are reduced, and materials are saved; the inner supporting frame bodies are radially arranged with the center of the circle and the center of the stand column as a supporting point, and structural stress is reasonable. The supporting frame body is simple in structure, neat, attractive, reasonable in stress and easy to operate, the center stand column is recycled, and construction is efficient.

The invention provides a pulse intelligent grouting control method and system, and relates to the technical field of civil engineering, according to the pulse intelligent grouting control method and system, measuring point displacement data in a construction site is obtained in real time and used for establishing an optimal grouting parameter prediction analysis model, grouting parameters are incorporated into a finite element model, the fitness of each group of parameters is calculated, and the optimal grouting parameter prediction analysis model is obtained. A combination with the highest fitness is selected as an optimal grouting parameter, a pulse intelligent control technology is utilized, a grouting pulse index is comprehensively generated, a pulse threshold value is set, and when the grouting pulse index exceeds the threshold value, a system automatically stops grouting, so that accurate control over the grouting process is achieved. According to the method, through the grouting parameter analysis model, the optimal value of the grouting fitness is calculated, and the grouting parameters are optimized, so that accurate control and optimization of the grouting process are realized.

The invention relates to a control system for stabilizing an equipment foundation embedded part mounting device. Comprising the following steps that a dynamic sensing network is arranged on an embedded part mounting device, comprises a tilt angle sensor, a pressure sensor and a displacement sensor and is used for monitoring the dynamic balance state of the embedded part in real time and obtaining monitoring data; the monitoring data are integrated through the central processing unit to form real-time three-dimensional attitude and gravity center position feedback of the equipment foundation; constructing a posture adjustment algorithm based on real-time monitoring data, simulating mechanical changes in the installation process of the embedded part by utilizing a finite element dynamic analysis model, and calculating an adjustment angle and a position deviation; the inclination angle and height of the mounting platform are finely adjusted through an electric servo device, and self-adaptive posture regulation and control of the embedded part are controlled; a partition pressure control technology is adopted, the bottom of the mounting device is divided into a plurality of mechanical unit areas, and the supporting force of each area is adjusted in real time through a distributed pressure regulator; and dynamic balance monitoring data is combined.

The invention provides a foundation pit drainage structure and a drainage method thereof, and relates to the technical field of foundation pit drainage. Comprising a base plate, a fixing ring is arranged above the base plate, a filter cartridge is arranged between the base plate and the fixing ring, a cross-shaped support is fixedly arranged in the middle of the inner ring face of the filter cartridge, an outer cartridge is inserted into the middle of the cross-shaped support, a transverse plate is fixedly arranged in a top end opening of the fixing ring, an inner cartridge is arranged in the middle of the transverse plate, and the bottom end of the inner cartridge is slidably inserted into a top end opening of the outer cartridge; a side plate is fixedly arranged on the right side of the top face of the transverse plate, and a drainage pump is installed on the top of the side plate. The problem that an inlet of a foundation pit drainage structure is prone to being blocked during foundation pit drainage is solved, the foundation pit drainage structure is suitable for foundation pit drainage operation under different working conditions, the blocking risk is avoided, the foundation pit drainage capacity is improved, smooth foundation pit drainage and normal construction are guaranteed, and the foundation pit drainage efficiency is improved.

The invention discloses an artificial stratum freezing engineering monitoring and early warning method and system based on digital twinning, and relates to the field of underground engineering. According to the method, the three-dimensional geometric structure of an artificial stratum freezing engineering site, freezing pipe arrangement, the preset temperature of freezing liquid and stratum physical and mechanical parameters are calculated according to the three-dimensional geometric structure, the freezing pipe arrangement, the preset temperature of freezing liquid and the stratum physical and mechanical parameters; the stratum thermophysical parameters serve as the actual situation of the freezing project and are input into the numerical model, and prediction data of all positions of an artificial stratum freezing project site within preset time are output; determining the numerical model as a trained numerical model based on the preset value, the prediction data and the real temperature of the rock-soil body monitored at each temperature measurement point in real time; based on the trained numerical model, determining target prediction data of each position of the artificial stratum freezing engineering site within a preset time; based on the target prediction data, determining a freezing result of the on-site artificial stratum freezing project; and according to the freezing result and a preset deformation standard, determining an abnormal freezing result and carrying out early warning. And the monitoring and early warning efficiency of the freezing effect is improved.

The invention provides a concentric circle filling device and an application method in mass concrete crack control, and belongs to the technical field of hydraulic structures. The concentric circle filling device comprises a pipe body structure, the pipe body structure comprises an outer pipe body and an inner pipe body, the outer pipe body and the inner pipe body are coaxially arranged in a sleeved mode, and an annular area between the outer wall of the inner pipe body and the inner wall of the outer pipe body serves as a first storage space; an inner cavity of the inner tube body serves as a second storage space; the inner tube body is sleeved with an inflatable annular air bag, and when the annular air bag is not inflated, the annular air bag can slide up and down along the inner tube body; after the annular air bag is inflated, one end of the first storage space can be completely sealed and plugged; an air bag ball is arranged in the inner tube body, and after the air bag ball is inflated, one end of the second storage space can be completely sealed and plugged. The method is implemented based on the concentric circle filling device and is applied to mass concrete crack control. Cracks generated by the gate pier can be effectively controlled, and meanwhile the integrity of the structure is improved.

The invention discloses a template embedded type dam face permanent heat preservation protection module and a prefabrication and construction method. Comprising a heat preservation core layer, a facing anti-seepage protection layer is arranged on the side, close to a concrete pouring formwork, of the heat preservation core layer, an internal pressure-bearing protection layer is arranged on the side, close to dam surface layer crack limiting steel bars, of the heat preservation core layer, and a thermal broken bridge supporting keel is arranged in the heat preservation core layer; an anchoring device is arranged in the area between the internal pressure-bearing protection layer and the dam surface layer crack limiting steel bars. The modular prefabrication and construction method is adopted, the prefabrication and installation method of a single module is simple and efficient, details such as anchoring protection measures are fully considered, the engineering construction operability is high, convenience and high efficiency are achieved, and the construction time of the heat preservation layer is greatly saved.

The invention discloses an old wind power plant fan foundation small-to-large capacity increasing structure and a transformation construction method. The old wind power plant fan foundation small-to-large capacity increasing structure comprises an original fan foundation, a newly-poured reinforced concrete foundation, a vertical anchor bolt cage connecting system and a radial anchor bolt connecting system. The connecting structure of the bottom section of the new fan tower drum and the new fan foundation comprises a vertical anchor bolt cage connecting system and a radial anchor bolt connecting system. The vertical anchor bolt cage connecting system is fixed in the original fan foundation, and the radial anchor bolt connecting system is fixed in the newly-poured reinforced concrete foundation. According to the new fan foundation, the diameter of the middle pier is expanded so as to arrange a new tower tube, the height of the middle pier is not changed, the height of the middle pier of the newly-poured foundation almost does not need to be increased, and the using amount of concrete is greatly reduced. Meanwhile, according to the structure, an original vertical anchor bolt cage connecting system is reserved, a radial anchor bolt connecting system is adopted for enhancing connection between the bottom section of the fresh air fan tower barrel and the fan foundation, the transformation cost and the connection reliability are effectively controlled, and the maximization of reutilization of the original fan foundation and the controllability of the cost of the fresh air fan foundation are achieved.

The invention provides a mine water prevention and control risk early warning method and system based on earthquake and geology fusion, and belongs to the field of soil layer or rock drilling, the method comprises the steps that real-time earthquake data of an earthquake monitoring module and geological exploration data of a geological exploration module are received, and the geological exploration module comprises a drilling detection module and a hydrogeological analysis module; based on the real-time seismic data, the geological exploration data and a preset water prevention and control risk early warning model, obtaining a risk level including a risk level and a corresponding water prevention and control execution measure; triggering target execution equipment such as drilling equipment to perform prevention and treatment according to execution measures; drilling a monitoring hole and arranging an optical fiber osmometer to collect osmotic pressure data at a first risk grade; at the second risk level, grouting plugging is conducted on the crack drilling grouting holes; constructing a water guide hole in the aquifer at the third risk level, and guiding underground water to a safe area through a drainage pump group. According to the method, multi-source data are fused to realize graded accurate early warning and prevention.

The invention provides a structure capable of controlling a large-volume water gate crack and a construction method thereof, and belongs to the technical field of water gates. The structure comprises a gate bottom plate and a gate pier which are formed by pouring concrete, and the gate pier is arranged above the gate bottom plate; hole cavities are at least formed in the gate piers and reserved in the concrete pouring process. The hole cavity is used as a self-constrained stress hole; and the tough material is used for absorbing stress, is filled in the pore cavity and is connected with the inner wall of the pore cavity. The method comprises the steps of S1, construction preparation; s2, foundation treatment; s3, gate bottom plate construction; s4, gate pier construction: S41, construction lofting; s42, gate pier reinforcing steel bars are bound and installed; s43, a gate pier formwork is erected above the gate bottom plate; s44, a hole forming device is installed at the designed position; s45, concrete pouring, vibrating and curing are conducted; and S46, after initial setting of the concrete, the hole forming device is pulled out of the pipe, and a formed hole cavity is filled with a tough material. The sluice pier crack can be effectively controlled, and the use durability and safety of the sluice are improved.

The invention relates to the technical field of land fan foundations, and discloses a land wind power fan foundation structure and a construction method thereof.The land wind power fan foundation structure comprises a prefabricated outer framework with the narrow upper portion and the wide lower portion, and a prefabricated bottom anti-inclination assembly comprises a bottom cylinder arranged in a counter bore in the middle of a foundation pit and a reinforcing framework fixed to the bottom cylinder; the top of the prefabricated top base framework is located at the top of the prefabricated outer framework, the middle of the prefabricated top base framework is located in the prefabricated outer framework, and the bottom of the prefabricated top base framework is connected with the reinforcing framework in a positioning and clamping mode, so that the prefabricated outer framework, the prefabricated bottom anti-inclination assembly and the prefabricated top base framework are combined into a whole; through the combined design of the prefabricated outer framework, the prefabricated bottom anti-inclination assembly and the prefabricated top base framework, the foundation structure high in integrity and stability is formed. The connection mode of all the components can effectively resist lateral force and overturning moment, and safe operation of the fan tower drum is ensured.

The invention provides a concrete regulation and control system and method integrating heat recovery, spraying and gradient control, and relates to the technical field of concrete curing, and the concrete regulation and control system comprises a temperature sensing element and a humidity sensing element which are mounted on reinforcing steel bars in a concrete structure in a layered manner in the depth direction; the cooling water circulating system comprises a water pump and a cooling water pipe, and the cooling water pipe is arranged in the mass concrete structure and externally connected with a variable frequency circulating pump; the double-water-tank system is matched with the heater to realize graded regulation of water temperature; the automatic spraying system is connected with the integrated electric heating module; the heat recovery and circulation assembly is connected with an outlet of a cooling water pipe in the concrete, recovers concrete hydration heat brought out by the cooling water pipe, and transfers heat of high-temperature cooling water with the temperature being 50 DEG C or above to the phase change heat storage tank; the central control unit continuously receives and records monitoring data of the temperature sensor and the humidity sensor and analyzes the monitoring data in real time, and when the temperature gradient or the humidity gradient exceeds the limit, a gradient field control instruction is automatically triggered to achieve energy efficiency maximization.

The present invention relates to the technical field of offshore engineering facilities, and in particular to an offshore wind power suction tube conductor frame installation method and device. Lifting points are respectively arranged at opposite ends of a lying conductor frame body. By controlling the lifting speed of each lifting point, the conductor frame body is flipped over to an upright state, thereby facilitating the installation of the suction tube body and the conductor frame body. After the installation, the two can be directly transported vertically, solving the major problems of traditional three-pile suction tube conductor frame construction process and equipment investment. The initial investment of the entire device is about 25 million, which is far lower than the initial investment of nearly 200 million of super-large gantry crane equipment; and there is no need to tension cable wind ropes, so the impact on the site is minimized; the foundation treatment is simple, the overall stability is good, and the economic benefit is high; the requirements of horizontal construction of the upper conductor frame and overall turning over, lifting and splicing are met, the horizontal construction of the upper conductor frame can be realized, the construction accuracy and construction efficiency are improved, and the risk of high-altitude operations is reduced.

The present application belongs to the technical field of mass concrete construction, and aims to solve the problem of high thermal resistance and slow heat dissipation of traditional cooling pipe laminar bottom layer, and discloses a gravity dam construction cooling water pipe based on destruction of laminar bottom layer and a method thereof. The cooling water pipe comprises a plurality of series water pipe units, each water pipe unit comprises a steel pipe, a flexible spring hose is arranged in the steel pipe, and the spring hose forms a spiral protruding turbulence structure along the inner wall of the steel pipe; the hose is fixed by pointwise anchoring and outer wall surface bonding with glue, and a ring is arranged at both ends for limiting and assisting turbulence. The present application breaks through the thermal resistance of laminar bottom layer, greatly improves the hydration heat conduction efficiency, is convenient to construct and has durable structure, and is suitable for mass concrete temperature control requirements.

The invention belongs to the technical field of gate shaft construction, and particularly relates to a one-time forming pouring system and a one-time forming pouring method. The gate groove formwork and the vertical shaft sliding formwork assembly in the one-time forming pouring system can move in the depth direction of the gate shaft and jointly define a pouring ring, and when the strength of hydraulic concrete structures corresponding to the vertical shaft sliding formwork assembly and the gate groove formwork reaches the demolding strength, the gate groove formwork and the vertical shaft sliding formwork assembly are separated. The positions of the vertical shaft sliding formwork assembly and the gate groove formwork can be adjusted through the lifting device and the hoisting device, so that the pouring space rises in the depth direction of the gate shaft, continuous pouring of the hydraulic concrete structure is met, pouring of the hydraulic concrete structure does not need to be conducted step by step, joints are avoided, and the construction efficiency is improved. The integrity and shear strength of the hydraulic concrete structure are improved, so that the construction quality of the hydraulic concrete structure in the gate shaft is ensured, and meanwhile, the construction difficulty is reduced.

The invention relates to the technical field of foundation pit drainage, and provides a deep foundation pit drainage system and a use method.The method comprises the steps that a1, an annular dewatering well is arranged on the periphery of a deep foundation pit, and underground water is collected and lowered through the annular dewatering well; a2, a drainage network in the foundation pit is established to eliminate surface rainfall and seepage water; a3, based on a preset water level control strategy, a drainage pumping device is started to drain the collected underground water away from the foundation pit; a4, hydrological changes inside and outside the deep foundation pit are monitored, and operation parameters of the dewatering well and the drainage system are adjusted in time so that the safe water level state in the deep foundation pit can be maintained; through the scheme of the embodiment of the invention, the problem of how to effectively prevent underground water from seeping into the foundation pit in a high-water-level area by the deep foundation pit drainage system can be solved.

The present application relates to the technical field of pre-buried construction of basement steel columns, and specifically to an integrated casting construction method for steel-concrete columns and caps, comprising the following steps: S1, measuring the installation positions of the steel columns and anchor fixing brackets, and marking them by spraying red paint; S2, tying the steel bars at the bottom of the cap at the bottom of the installation position; S3, setting an anchor fixing bracket for installing the steel columns, and installing and placing the anchor fixing bracket according to the measurement and positioning records; S4, spot welding the anchor fixing bracket to the steel bars at the bottom of the cap or the steel bars at the pile head of the cap with auxiliary steel bars; S5, hoisting the steel columns to the top of the anchor fixing bracket by a tower crane, and assisting in positioning and installation by multiple personnel during the hoisting process, and hoisting the steel columns to the upper surface of the anchor fixing bracket; S6, steel bar operators tie the vertical steel bars and stirrups on the outside of the steel columns, and strictly control the range of the column stirrups to ensure the effect of the column concrete after molding, and then pouring.

The present invention relates to the technical field of ship lock concrete construction, and in particular to a material placing system and construction method for concrete pouring on a high surface of a ship lock. According to the present invention, a feeding belt conveyor is arranged in a line direction of the ship lock and used for conveying concrete materials from a bottom end to a high end, and then by means of a bidirectional telescopic material placing machine which is transversely arranged, the concrete materials are transversely conveyed to the side wall of the ship lock for concrete pouring; the pouring height is adjustable; the transverse extension and retraction length is adjustable, and the bidirectional telescopic material placing machine can extend and retract along the left side and the right side in the transverse direction; and the pouring range is large, and the construction efficiency is high.

The invention provides a grouting geology grading and construction parameter setting method based on rock mass permeability, and relates to the technical field of foundation engineering grouting construction.The method comprises the steps that the water permeability rate, fracture parameters (the number of independent unfilled fractures, the opening degree and the filling condition), ground stress and grout rheology data of a target hole section are obtained; calculating a grouted stratum grouting index (SGI) through the water permeability rate, the fracture number, the maximum equivalent fracture opening degree and the correction coefficient; the rock splitting strength is estimated in combination with the drilling condition; whether grouting is conducted or not is judged based on the SGI value, and the grouting starting water cement ratio, the grout changing strategy, the initial pressure and the pressure increasing strategy are dynamically adjusted; the grouting pressure is designed according to the stratum splitting strength, and the grouting termination condition is set in combination with the real-time flow-pressure data. Grouting parameters are optimized through quantitative grading and real-time data, experience dependence is reduced, the construction precision and efficiency are improved, the stratum adaptability is enhanced, and the engineering quality and the material utilization rate are ensured.

An ergonomic stabilizer pad and ergonomic assembly that stabilizes equipment—e.g., cranes or vehicles with outriggers—during use as well as protects the ground surface on which the equipment is placed. The stabilizer pad includes an ergonomic handle and arrangement. An ergonomic stabilizer pad assembly comprises modular components that divide the weight of the assembly between individual components. Each component can be separately transported and a stabilizer pad assembly quickly and easily constructed and deconstructed. Furthermore, the ergonomic stabilizer pad assembly compensates for deflection of the pad that occurs during use and may be used with existing stabilizer pads. The invention eases lifting tasks associated with transporting and positioning stabilizer pads and may reduce the incidence of user injuries. According to the invention, any size pad, even large sizes with a large weight, can be easily handled.

The invention particularly relates to a control tower building machine and a curtain wall mounting system thereof, and relates to the technical field of building equipment, the control tower building machine comprises a cylindrical control tower, a plurality of foundation embedded parts arranged on the periphery of the cylindrical control tower in a surrounding manner, a foundation bottom section fixedly locked on the tops of the foundation embedded parts, and a plurality of connecting sections spliced and locked on the upper side of the foundation bottom section; a plurality of ring beam sleeve frames are arranged on each vertical stand in a sliding and sleeving mode, a reinforcing and supporting assembly capable of being rapidly disassembled and assembled is additionally arranged between the foundation bottom section and the connecting section, and the reinforcing and supporting assembly is locked and fixed to the bottom face auxiliary support through ground nails. The foundation bottom section and the connecting section are effectively clamped together through the four outer sleeve rods, the connecting tightness is improved, the foundation bottom section and the connecting section are limited in the front-back direction, the left-right direction, the upper direction and the lower direction, dislocation and collapse of the foundation bottom section and the connecting section are avoided, the good supporting effect on the foundation bottom section can be achieved, and the using strength is improved.

The invention relates to the technical field of engineering, in particular to an intelligent concrete curing system based on temperature and humidity adjustment, and the system comprises an acquisition unit which is used for acquiring coating images of the surface of concrete after pouring at a plurality of time points, and acquiring temperature data of a plurality of positions in the concrete and environment temperature data; the analysis unit determines a dry area and a wet area according to the film covering image, determines a dry-wet ratio change rate, determines a temperature difference change rate according to the position temperature data and the environment temperature data, and determines a water evaporation rate in the concrete according to the dry-wet ratio change rate and the temperature difference change rate; the control unit adjusts the curing temperature according to the water evaporation rate and a preset first evaporation rate, and adjusts the water spraying amount / spraying frequency according to the water evaporation rate and a preset second evaporation rate; and the execution unit is used for curing the concrete according to the adjusted curing parameters. Concrete curing parameters are intelligently controlled, and the concrete curing effect is improved.

The invention provides equipment and method for repairing a concrete lining plate in a running water state, and the equipment comprises a truss which is arranged in the depth direction of a canal surface, one end of the truss is a water inlet end, the other end of the truss is a water outlet end, the truss is provided with a sliding frame in a sliding manner, and the sliding frame moves back and forth on the truss in the direction of the water outlet end or the direction of the water inlet end; the telescopic unit is provided with a mounting end and a working end, the mounting end is slidably arranged at the bottom end of the truss so as to slide along the width of the truss, and the working end is provided with a rotating part; and the operation module comprises a cutting unit and a dismounting and mounting unit, and the cutting unit and the dismounting and mounting unit are selectively arranged on the rotating part according to the operation content. The combination of the telescopic unit and the rotating part is matched with the cutting unit and the dismounting and mounting unit to sequentially cut, separate, extract and convey the damaged lining plate and mount the new lining plate, divers do not need to enter water for operation, and compared with cofferdam construction, the device can be directly deployed at the position needing to be repaired, so that the preparatory work process is simplified.

The invention relates to the technical field of cement-based building materials, in particular to an ultra-high-performance grouting material for an offshore wind power jacket and a preparation method and application of the grouting material. Cement, fine aggregate, corundum micro powder, a superfine mineral admixture, a reinforcing agent, a reinforcing accelerant, an expanding agent, a water reducing agent, a defoaming agent and steel fibers are adopted as raw materials; the grouting material for the offshore wind power jacket, which is high in compressive strength and good in tensile strength and ultimate elastic tensile strength, is prepared by utilizing the compatibility of the superfine mineral admixture, the reinforcing agent and the reinforcing accelerant and cooperating with the steel fibers.

An intelligent dredging system for a high-piled wharf and a control method thereof are provided, and the system includes an intelligent monitoring-decision control subsystem and a decentralized high-pressure water disturbance subsystem. The intelligent monitoring-decision control subsystem is composed of a high-precision pile-foundation sediment siltation warning device, a tidal monitoring device and a control terminal. The decentralized high-pressure water disturbance subsystem is composed of a water spraying device, a cable and a multi-loop power distribution device.

The invention discloses cement-based tough water-stop mortar suitable for underwater repair of concrete joints and a rapid construction process of the cement-based tough water-stop mortar. The cement-based tough water-stop mortar is prepared from three materials, namely a powder material, a polymer emulsion and water, wherein the powder material is prepared by mixing cement, glass beads, modified fibers, modified rubber particles, quartz sand, a water reducing agent, a defoaming agent and an anti-dispersing agent. The cement-based tough water-stop mortar material is based on a cement-based material, through multi-component optimization and synergistic effect, the cement-based tough water-stop mortar material is pasty after being mixed, joints do not flow, the viscosity is low, the underwater dispersion resistance is excellent, and the cement-based tough water-stop mortar material is suitable for long-distance pipeline pressurized conveying and underwater extrusion forming; the underwater interface bonding strength is high, and the characteristics of low elastic modulus, high elasticity and high toughness are achieved after hardening; the underwater construction technology of caulking repair is provided, a pressing spatula is adopted to press the upper edge of the joint, discharging and plastering construction are conducted at the same time, and the underwater repair technology is suitable for underwater rapid and long-acting repair of the joint defects of the hydraulic concrete structure.

The invention discloses an implementation method of an assembled Larsen steel plate trestle, and relates to the technical field of foundation pit platform construction processes. An implementation method of an assembled Larsen steel plate trestle comprises the following steps of pile foundation and trestle vertical frame construction, trestle beam frame construction, trestle deck construction, first-layer trestle vertical frame supporting construction, multiple-layer trestle vertical frame supporting construction, construction and follow-up maintenance. According to the construction method provided by the invention, the assembled Larsen steel plate trestle can be constructed, the assembled Larsen steel plate trestle not only has high bearing capacity, but also is simple and convenient to construct, can be quickly mounted and dismounted on a foundation pit construction site, and has high construction efficiency, in addition, each main structure can be repeatedly used for multiple times, materials are favorably saved, and the construction cost is reduced. The construction cost is reduced.

The utility model provides a dewatering device for underground building construction, which comprises a vehicle body and a filter box with a filter chamber and a slag discharge chamber which are communicated with each other, a circular truncated cone-shaped filter cartridge is arranged in the filter chamber, a water purification cavity is formed between the filter cartridge and the filter chamber, a water inlet is arranged at the large-diameter end of the filter cartridge close to the slag discharge chamber, and a water outlet is arranged at the small-diameter end of the filter cartridge. The water purification cavity is provided with a water outlet; the water pumping unit comprises a first driving mechanism, a water pumping head and a water pump, the first driving mechanism can drive the water pumping head to move in the three-dimensional space, a first pipeline is arranged between the output end of the water pumping head and the water inlet, a filtering mechanism is arranged in the water pumping head, and a second pipeline is arranged between the water suction end of the water pump and the water outlet; and the plugging unit comprises a plugging plate which is in sealing connection with the filter box, and one part of the plugging plate extends into the space between the filter chamber and the slag discharging chamber, can slide relative to the filter box and seals and isolates the filter chamber and the slag discharging chamber. The dewatering device for underground building construction has the advantages of being high in construction efficiency and capable of adapting to complex terrain environments.