251results about "Caissons" patented technology

This invention relates to the field of deep foundation pit support construction technology, specifically a nested support construction process for deep foundation pit elevator shafts and sump pits. It solves the problem that traditional caisson waterproofing technology is prone to failure due to pit wall collapse in highly permeable gravel strata, making it difficult to create stable construction conditions. The process includes a steel caisson support structure, within which a steel caisson waterproofing structure is nested. This steel caisson waterproofing structure is used in conjunction with the steel caisson support structure for nested construction. This invention, through the nested cooperation of the steel caisson support structure and the steel caisson waterproofing structure, and the injection of a self-compacting concrete filling layer, achieves an integrated support and waterproofing effect during construction. It creates a stable, dry, and enclosed working space in easily collapsible, highly permeable strata, solving the problem of failure of traditional single waterproofing technology and creating safe and reliable conditions for subsequent structural construction.

The utility model relates to the technical field of open caisson construction equipment, and discloses an open caisson anti-inclination device which is arranged on a well body and comprises I-shaped steel arranged on the well body, a deviation rectification adjusting mechanism is arranged on the I-shaped steel and comprises a movable positioning assembly and a weight increment deviation rectification assembly, the movable positioning assembly is arranged at the lower end of the I-shaped steel, and the weight increment deviation rectification assembly is arranged at the lower end of the movable positioning assembly. The well cover is matched with the well body; and the weight increasing and deviation rectifying assembly is arranged at the upper end of the I-shaped steel and matched with the concrete plate. Through the arrangement of the movable positioning assembly, limiting and movement control can be removed conveniently, a rolling migration mechanism is formed, and reset locking of the dynamic I-shaped steel position is achieved; through the arrangement of the weight increasing and deviation rectifying assembly, limiting release and concrete plate loading, pressure self-balancing locking and anti-displacement guarantee can be achieved, and concrete plate sliding caused by construction vibration or load change is effectively restrained; the problems that a traditional deviation rectifying structure cannot dynamically adjust the position in a well in real time, and deviation rectifying hysteresis is prominent are solved.

The utility model discloses an emergency rescue high bin grid caisson template structure, including caisson template mechanism, the caisson template mechanism includes a plurality of template frame that connects in proper order, and is connected through the bend connecting support between template frame, the both ends of bend connecting support with the both sides adjacent template frame between respectively through detachable connecting structure and connect, the bottom outside of template frame respectively detachable connection has bottom connecting beam, the both ends end of bottom connecting beam and the end of adjacent bottom connecting beam between through lock pull structure and lock, the caisson template mechanism still includes a plurality of setting between adjacent template frame's lock pull connecting support, lock pull connecting support will adjacent bottom connecting beam and draw tight, through above -mentioned structure realizes in the process of emergency rescue repair building construction, with high stability, high construction efficiency mode and pours the concrete construction, and the above -mentioned template structure prevents the high ability of inflation, and the stability, security of construction is high.

The application discloses a caisson pressure-lifting sinking control device and method, and relates to the technical field of caisson construction. The caisson pressure-lifting sinking control device comprises a supporting assembly, a pressure-lifting assembly for controlling sinking of a caisson segment is arranged on the supporting assembly; the pressure-lifting assembly comprises a downward pressing mechanism for pressing down the caisson segment and a lifting mechanism for lifting the caisson segment. The application can realize active adjustment of sinking timing, single sinking amplitude and sinking speed of caisson construction, changes sinking of the caisson from an uncontrolled mode to a controlled mode, improves sinking precision and safety of the caisson, and reduces engineering risk.

This invention provides a circular caisson resonant pool combination structure, comprising an upper circular caisson, a lower circular caisson, and a resonant pool. The upper and lower circular caissons are stacked, with the resonant pool positioned on their rear sides. The wave-facing sides of both the upper and lower circular caissons are arc-shaped curved surfaces, and the top-view outline of the upper caisson overlaps that of the lower caisson. Along the wave-facing direction, the upper and lower circular caissons are staggered with the resonant pool. This invention, through its two-layer stacked circular caisson and resonant pool combination structure, achieves superior stress performance, reduces wave reflection, and significantly weakens wave energy accumulation through scattering, maintaining a stable harbor surface. Addressing the strong penetrating characteristics of medium- and long-period waves, the resonant pool allows the internal fluid to approach a resonant state, utilizing fluid viscosity and vortex structures to dissipate wave energy, further enhancing the wave-damping effect.

The application provides a kind of river bottom super deep high water pressure shield maintenance and re-pushing construction method, and relates to the technical field of shield construction.When shield machine is forced to stop during tunneling in river due to equipment failure, especially when serious failure such as disassembling cutter head or taking out bearings for maintenance occurs, sink well is sunk to design elevation, the soil between sink well and cutter head and the soil around shield is frozen and reinforced from sink well to shield direction, the portal is broken and the frozen soil in front of cutter head is removed by using underground excavation method, and annular lining is constructed, and shield machine is pushed into sink well from annular lining for maintenance and then launched for the second time;The application can provide safe working space for shield equipment maintenance in water bottom environment with water depth of more than 20 meters, so that it can re-tunnel, and the tunnel can continue construction.

To provide a correction method of rotation of a caisson skeleton and a caisson skeleton in a pneumatic caisson method.SOLUTION: A correction method of rotation of a caisson skeleton 100 accompanied by sinking of the caisson skeleton 100 in a pneumatic caisson method includes: a tensioning step in which a tendon 110 provided at an outer periphery of the caisson skeleton 100 gives tensile force T in a direction correcting rotation; and a correction step of correcting rotation of the caisson skeleton 100 by the tensile force T when the caisson skeleton 100 sinks.SELECTED DRAWING: Figure 4

This application discloses a sacrificial pile group, sacrificial piles, and a method for positioning the sacrificial pile group, belonging to the field of bridge foundation protection and water flow control technology. The sacrificial pile group is located on the upstream side of the bridge pier and consists of a guiding zone far from the pier and a return flow reflection zone adjacent to the pier. A kinetic energy dissipation zone is formed between the two zones. Through flow diversion, return flow counter-current, and turbulent collision, the kinetic energy of the water flow is dissipated step by step, suppressing downflow and horseshoe vortices around the pier, and synergistically mitigating scouring and erosion of the pier foundation. The sacrificial pile is a cylindrical structure with openings along the water flow direction, which can divide the incoming flow and suppress turbulent superposition. The openings use non-uniform cross-section flow channels to accelerate the water flow. Multiple sets of openings can be set to adapt to water level fluctuations, and active thrust components such as shaftless pumps can be integrated to form a combined active and passive flow control structure. The sacrificial pile adopts a modular combination design of fixed sections, pile body sections, perforated sections, and pile top sections, which is convenient to connect and highly versatile. The positioning method uses prefabricated land-based positioning and bearing reference components as a unified platform. After precise placement of connectors, the entire pile group is sunk into place, achieving high-precision positioning and stable installation. This application offers high protection efficiency and strong adaptability to various working conditions, effectively improving the erosion and abrasion resistance of bridge foundations and reducing operation and maintenance costs.

To provide a device for preventing rocking of a box body and a method for installing the box body in water, capable of reducing labor required for work for installing a storage body in the box body and work for removing the storage body from the box body.SOLUTION: A housing body 2 having a bottom surface 3 and a peripheral wall 5 formed of a waterproof sheet is installed on a box body 50 having a hollow part 51, and a fluid Wb is housed in a non-filled state in an area partitioned by the bottom surface 3 and the peripheral wall 5 for constituting the housing body 2. When the box body 50 in a state of floating on the water is oscillated and inclined, the box body 50 is moved downward and installed at a prescribed position in the water by injecting water Wa into the hollow part 51 while suppressing the oscillation of the box body 50 by making the fluid Wb flow toward the lower side in the inclination direction of the box body 50 inside the housing body 2.SELECTED DRAWING: Figure 1

The invention provides a measurement and control method and system for underwater immersed tube butt joint. The method comprises the following steps that optical, mechanical and inertial multi-source sensor data and the like in the immersed tube butt joint process are synchronously collected; and when the optical beacon is shielded, the position of the optical beacon is repaired through inverse dynamic estimation. Performing time-frequency analysis on the multi-source data, and separating the multi-source data into a motion main signal and a noise signal; the motion main signal is input into a motion state filter, and the noise signal is input into a noise state model filter to identify comprehensive noise features in real time. The core step is to generate a feed-forward compensation item based on the noise characteristics, and the feed-forward compensation item is used for correcting the updating process of the motion state filter so as to eliminate the noise influence in advance and output the optimal pose estimation. And finally, generating a smooth control instruction based on the optimal pose. The method has the effect of improving the butt joint precision of the immersed tubes in the underwater complex environment.

The utility model discloses an adjustable open caisson excavation positioning device which comprises a bottom plate, and positioning pins are fixed to the bottom of the bottom plate at equal angles. A pipeline penetrates through the middle of the bottom plate in a sliding mode, a first motor is fixed to the outer end of the bottom plate, a threaded rod is in key connection with the inner end of the first motor, the threaded rod is connected into the bottom plate through a bearing, a moving plate is in threaded connection with the threaded rod, and a second motor is fixed to the top of the inner end of the moving plate. And the output end of the second motor is connected with the friction belt, and the inner wall of the friction belt is attached to the outer wall of the pipeline to form a limiting mechanism. The adjustable open caisson excavation positioning device is provided with the threaded rod, the threaded rod can be driven to rotate through the first motor, then the threaded rod can drive the moving plate to move, rapid adjustment can be conducted according to pipelines of different sizes, and therefore re-adjustment is avoided, and the use convenience is improved.

Provided are a digging robot, a caisson construction system and a caisson construction method. The digging robot comprises a base installed on a fixed position in a shaft structure, a support assembly and a movable arm. The support assembly is installed to the base and can rotate relative to the base about a first vertical axis. The movable arm is installed to the support assembly and can rotate relative to the support assembly about a second vertical axis. The second vertical axis is parallel to the first vertical axis and is spaced apart from the first vertical axis by a predetermined distance. The movable arm can also swing relative to the support assembly about a first horizontal axis. The end of the movable arm is provided with a digging part configured to dig soil in the shaft structure within a predetermined contour in response to the digging robot running a predetermined program. According to the scheme of the present application, the digging robot is suitable for undrained construction, is flexible to operate, can adapt to shafts with any cross-sectional shape, and the frequently moving parts have small weight, which can slow down wear and tear and prolong service life.

The invention relates to a prestress tension cast-in-place integral open caisson construction method which comprises the steps that a foundation pit is excavated in a preset area, a bottom layer well body is arranged in the foundation pit, a steel strand penetrates into a threading pipe of a lower open caisson body, and the prestress tension procedure is executed; the open caisson structure is controlled to gradually sink by a corresponding depth size; and the steps of lower open caisson body manufacturing and open caisson structure sinking are repeatedly executed till the open caisson structure reaches the preset design depth, the reinforcement cage of the lower open caisson body of the upper layer is connected to the lower open caisson body of the lower layer through the connection mechanism, and at least one machinable area is reserved in the preset area of the open caisson structure. The open caisson structure is cast in place, and the requirement for the construction site area is lowered. The open caisson structure forms tensioning prestress through the steel strands, and the supporting force of the open caisson structure on surrounding soil is improved. The preset area of the open caisson structure forms a machinable area, so that tunneling equipment can conveniently tunnel into a soil body from the machinable area in the later period.

The invention discloses an open caisson real-time posture monitoring system and method based on the hydraulic communication principle, and belongs to the field of open caisson posture monitoring. The open caisson real-time posture monitoring system based on the hydraulic communication principle comprises an open caisson body, and open caisson inner sensors located at the same height are arranged in the open caisson body; an earth surface reference sensor, a liquid storage tank and data recording and processing equipment are arranged on the open caisson body, the open caisson inner sensors are used for collecting water pressure data of the same height in the open caisson, and the liquid storage tank communicates with the earth surface reference sensor and the open caisson inner sensors through liquid transmission pipelines. And the earth surface reference sensor and the in-open caisson sensor are connected with the data recording and processing equipment through data lines. According to the open caisson real-time attitude monitoring system and method based on the hydraulic communication principle, the problems that in the prior art, precision is low, arrangement is complex, the anti-interference capacity is weak, maintenance is difficult, and manual guarding is needed can be solved.

The utility model relates to the technical field of gravity type foundation construction, in particular to a large steel-concrete combined caisson. The caisson structure comprises a top plate, the top plate is a steel shell concrete plate, and the top plate comprises a steel shell and concrete arranged in the steel shell; the bottom plate and the top plate are oppositely arranged; the two ends of the vertical wall are fixedly connected with the top plate and the bottom plate respectively, and the vertical wall is arranged along the outer periphery of the top plate in the circumferential direction; the multiple stand columns are fixedly arranged on the bottom plate to support the top plate. The top plate of the caisson adopts the steel shell concrete plate, the concrete in the steel shell provides strength and durability, the steel shell outside the concrete also has the characteristic of high construction speed, and the construction cost is lower than that of a steel foundation; the problem that a large gravity type caisson cannot give consideration to strength and rapid construction can be solved, the overall structure is simple, construction is easy, and great popularization value is achieved.

The invention is stay-in-place cladding for concrete, including reactive and slow-curing concretes, allowing for enhanced strength and durability of the contained concrete by allowing it to cure over time while enabling beneficial chemical reactions. The cladding is perforated with tubes or holes. A preferred embodiment is a caisson for concrete mixtures, where the caisson contains the concrete mixture, and the caisson is deployed in marine or terrestrial environments.

The invention relates to the technical field of open caisson construction, in particular to an active control type assembly type mechanized open caisson construction visualization system and method, and the method comprises the following steps: obtaining construction data of open caisson construction equipment in real time; based on construction data, obtained in real time, of the open caisson construction equipment, the corresponding robot three-dimensional model and the open caisson three-dimensional model are driven to synchronously move and are displayed; and in the intelligent control mode, the intelligent control module is in communication connection with the open caisson construction equipment, receives an operation instruction of a user and issues the received operation instruction to the open caisson construction equipment for execution so as to realize intelligent control. According to the method, the digital twinborn model is constructed, visualization and whole-process analog simulation of the whole operation process of the underwater robot and visualization of the open caisson posture and construction information are achieved, and an operator is helped to complete settlement construction work more accurately and efficiently.

A suction anchor has a skirt open at one end and closed at another end to define an interior volume. At least one conduit nested within or adjacent to the skirt, is open at one end and closed at another end to define an inner volume. A suction line is fluidly connected to the interior volume through a first valve. A second valve is fluidly connected between the inner volume and either the suction line or the interior volume. The first valve and the second valve are operable to cause water flow at respective selected rates along both the skirt and the conduit from a body of water when the interior volume and the inner volume are evacuated and the suction anchor is disposed on the bottom of a body of water.

This invention relates to the field of caisson bottom sealing construction technology, and discloses a dynamic sealing sludge and water inrush sealing system for caissons. The system integrates a bottom sealing template assembly, a dynamic sealing baffle, a novel quick-setting sealing grout injection assembly, a drainage and pressure relief assembly, a fixing and anchoring assembly, and an anti-sludge isolation assembly. The bottom sealing operation is completed through an integrated process of layered sealing, immediate curing, and simultaneous bottom sealing. During construction, the base is first cleaned and the components are installed; after the dynamic sealing baffle is deployed, it is hydraulically attached to the base plate and the water inrush point is detected; then, quick-setting grout is injected into the leakage area in a targeted manner, and drainage and pressure relief are simultaneously activated to regulate the pressure; after the grout has quickly set, the baffle is retained as a permanent water-stopping structure; finally, underwater concrete is continuously injected through a pre-set pipeline, and an anti-sludge isolation layer is set to ensure the density of the concrete. This system simultaneously achieves rapid water inrush sealing, dynamic pressure balance, and high-quality bottom sealing, solving the problems of poor sealing time, poor process connection, and difficulty in controlling the quality of underwater concrete in traditional processes.

The utility model belongs to the technical field of immersed tunnel butt joint, and discloses a top sealing assembly and a joint tool for a final joint of an immersed tunnel. The top sealing assembly comprises a top sealing frame, a top shell and a manhole pipe, and the top sealing frame is used for being arranged at the top of a gap between every two adjacent immersed tubes and used for assisting in forming a top sealing plate of a final joint of the immersed tunnel. The top shell covers the top sealing frame and is detachably connected with the top sealing frame, and a moving space capable of containing constructors is formed between the top shell and the top sealing frame. One end of the manhole pipe is connected with the top shell, the other end of the manhole pipe can extend to the water surface, and a channel in the manhole pipe is communicated with the activity space. By adopting the top sealing assembly for the final joint of the immersed tunnel, a constructor enters the moving space from the manhole pipe for water stop inspection, and the safety risk can be reduced; and meanwhile, constructors can pour the top sealing frame in the movable space above the top sealing frame to form the top sealing plate, so that the construction difficulty and the construction cost are reduced.

The invention relates to the field of urban flood protection, in particular to an underground parking lot water immersion early warning device which comprises a caisson, a water inlet tank, overhaul tanks, an intelligent integrated controller, three water level limiters and three drainage pumps, the caisson is divided into three cells, the water inlet tank is installed on the upper top of the caisson, the overhaul tanks are installed on the upper portions of the two sides of the caisson, and the caisson, the overhaul tanks and the intelligent integrated controller are combined into a whole. The caisson is buried under the slope surface of an abrupt slope at the entrance and exit of the underground parking lot, the highest position of the caisson is flush with the slope surface of the abrupt slope, and the three water level limiters and the three drainage pumps are installed in three grids of the caisson respectively and connected with the intelligent integrated controller through wires. And the intelligent integrated controller starts the drainage pump to discharge water outwards and sends early warning information to a property management center and a vehicle owner at the same time. The device has the beneficial effects that 1, rainwater flowing in through the entrance and exit abrupt slope can be automatically intercepted and discharged, and accumulated water of the underground parking lot is effectively reduced; the water immersion time can be calculated by monitoring the change of the water accumulation amount in the caisson, early warning information is sent to a property management center and a vehicle owner, the vehicle owner is reminded to move the vehicle out of the underground parking lot in time, and property loss caused by water immersion is avoided. And 3, a maintenance groove is formed, so that a worker can conveniently repair and maintain the equipment. And 4, the system can also be applied to other unattended low-lying areas.

To more accurately grasp an amount of filling material to be introduced during caisson installation work than when using a water pressure gauge, distance meter, etc.SOLUTION: Water W and a filling material R introduced into a space S press the optical fiber sensor 1 installed in the space S. As a result, the optical fiber sensor 1 receives pressure at a portion in contact with the water W and a portion in contact with the filling material R. Then, a monitoring device 2 specifies the magnitude of the pressure that the optical fiber sensor 1 receives and the position where the pressure is received. Thereby, the monitoring device 2 monitors the force that the space S receives from the water W or the filling material R.SELECTED DRAWING: Figure 7

To provide an intelligent adjustment control method, a facility, and a system particularly for an open caisson positioning settlement rope regarding the technical field of open caisson settlement construction.SOLUTION: This adjustment control method includes: an error calculation module for calculating a deviation change error with a rope A as a reference; and a width adjustment module for using PID to calculate an adjustment width of a cylinder application force, and returning to a step of determining whether the cylinder application force is within an effective range on the basis of the deviation change error.SELECTED DRAWING: Figure 1

The application discloses an anti-floating device for assisting steel-concrete combined hanging box installation, relates to the field of steel-concrete combined hanging box, and solves the problem of slow sinking speed of the steel-concrete combined hanging box, long waiting time for installation of the upper layer steel-concrete combined hanging box and low installation efficiency of the whole steel-concrete combined hanging box due to the large contact area of the bottom of the steel-concrete combined hanging box with water and large floating force during installation of the steel-concrete combined hanging box. The anti-floating device comprises a prefabricated bottom plate, and a steel casing is arranged at the top of the prefabricated bottom plate. The through hole and the gland are arranged. During installation of the steel-concrete combined hanging box, water flow can move through the through hole in the prefabricated bottom plate, the water draining speed of the bottom of the steel-concrete combined hanging box is increased, the upward floating force of water on the bottom of the prefabricated bottom plate is reduced, the sinking speed of the steel-concrete combined hanging box is increased, the installation of the wall plate of the next layer steel-concrete combined hanging box is correspondingly accelerated, and the installation speed of the steel-concrete combined hanging box is improved.

This invention provides a caisson for a silty riverbed, comprising: an outer caisson; and an inner caisson, at least partially located within the outer caisson, the inner and outer caissons being slidably connected in a first direction; and an electromagnetic locking mechanism, including a horizontal plate extending and retracting within the inner caisson in a second direction. When the electromagnetic locking mechanism is energized, the horizontal plate extends out of the inner caisson in the second direction and inserts into the external silt, thereby increasing the contact area between the caisson and the silt on the horizontal surface. This invention includes an electromagnetic locking mechanism; by energizing it, the electromagnetic locking mechanism moves the horizontal plate, inserting it into the silt. This increases the contact area between the device and the silt on the horizontal surface, preventing the caisson from swaying, tilting, or moving after sinking into the silt, thus ensuring the stability of the caisson.

The caisson shipping supporting and converting system comprises an automatic lifting module and a manual adjusting module, the automatic lifting module comprises a hydraulic lifting unit and three sets of fixed supporting beams arranged on a semi-submersible barge deck in parallel, and the hydraulic lifting unit comprises a plurality of sets of hydraulic jacks arranged on the fixed supporting beams; a group of rail clamping support beams is arranged in the middle of each fixed support beam; the manual adjusting module comprises a manual overturning cushion pier unit and two rail clamping supporting beams, and the manual overturning cushion pier unit comprises a plurality of overturning cushion pier devices arranged on the two sides of each rail clamping supporting beam. The invention further discloses an application method of the caisson shipping supporting and converting system. The application method comprises an automatic lifting method and a manual adjusting method. The semi-submersible barge can meet the shipping requirements of the caissons of various sizes at the same time, the semi-submersible barge has the function of shipping the caissons of various sizes, and construction is efficient, safe and reliable. The operation efficiency can be greatly improved, the manpower and material resource requirements are reduced, and the construction cost is reduced.

The invention relates to the technical field of civil engineering, and discloses an open caisson sinking inclination automatic monitoring and adjusting device which comprises an open caisson body, a control assembly is arranged at the bottom of the open caisson body, a ring base and the open caisson body are coaxial, a full-automatic inclination correction system is constructed, and rotating rollers of a second cavity are evenly distributed around the ring base. The bottom of the assembly plate is positioned through a fixing groove and meshed with inner ring teeth of the rotating ring through a connecting gear, and the top of the assembly plate is sleeved with an extrusion plate through external threads; a rotating ring drives a rotating roller to rotate, circular motion is converted into linear power for downward movement of an extrusion plate, an oil cavity of the inner ring wall of a ring base forms a communicating vessel through a communicating window, and oil on the sinking side is automatically gathered when the open caisson inclines; an extrusion plate is provided with a sealing ring for preventing leakage, moves downwards along with the rotating roller to apply pressure oil liquid, and is pressed into a corresponding oil liquid barrel through a communicating hole; the oil pushes the plug seat in the cylinder to ascend, the supporting rod drives the bearing table to abut against the blade foot, the bearing table ascends higher if the oil on the sinking side is large, the sinking trend is offset in a self-adaptive mode, and it is ensured that the sinking posture of the open caisson is stable.

The utility model discloses a spliced steel sinking well, the spliced steel sinking well includes a plurality of prefabricated steel pipe piece monomer, the plurality of prefabricated steel pipe piece monomer splices and connects and encloses the cylindrical structure, and the connecting piece is connected or welded connection between two adjacent steel pipe piece monomers. The utility model makes steel sinking well can be transported and installed in pieces, and the installation and transportation are convenient, and simultaneously can adapt to the foundation pit of different size through the size of monomer and spliced quantity adjustment, saves the customization cost, and reduces the customization period.

The application discloses a sinking well with adjustable sinking friction, which comprises a well body, an adjusting shell arranged outside the well body, a synchronous wheel arranged on the adjusting shell, and a self-adapting adjusting device arranged in the adjusting shell. The synchronous wheel comprises a first synchronous wheel and a second synchronous wheel. The first synchronous wheel and the second synchronous wheel are synchronously rotated by being installed around the adjusting shell, so that the speed of the well body is ensured to be the same during sinking, and the problem that the sinking amount of different parts is deviated during the sinking well construction, so that the posture of the sinking well is deviated, even cannot sink or suddenly sinks, is avoided. The self-adapting adjusting device is arranged in the adjusting shell, and when the posture of the well body is deviated, the self-adapting adjusting device replaces the synchronous wheel on one side of sinking, is fixed with the inner wall of the well, and the other side of the well body is sunk until the posture of the well body is corrected. The posture of the well body is controlled by pure mechanical control, compared with the electric drive control by a data collector in the prior art, so that maintenance is simple, and the price is relatively low.

The position of the excavation bucket passing through the interior is calculated along the entire length of the material lock and material shaft. [Solution] The soil removal control system is provided on a crane for suspending a soil removal bucket in the pneumatic caisson construction method and comprises: a winch for winding up a wire rope that suspends the soil removal bucket; an encoder provided on the winch that outputs a signal corresponding to the wire rope extension length; and one or more control units that acquire a signal corresponding to the wire rope extension length from the encoder, use the acquired signal to calculate the position of the soil removal bucket inside the material shaft connecting the work chamber at the bottom of the caisson to the ground and inside the material lock provided at the top of the material shaft, and control the winch according to the calculated position.