828 results about "Slurry wall" patented technology

The invention discloses an underground diaphragm wall steel bar lap joint bending resistance calculation method based on big data, and belongs to the technical field of underground engineering design. In order to solve the problems that the condition change of a construction site is difficult to respond in real time, the construction parameters are difficult to dynamically adjust and the complex construction environment is difficult to adapt, the data set quality and the bending resistance prediction precision are effectively improved through multi-source data acquisition and key feature screening, and a physical prediction model of a steel bar lap joint is established. According to the method, factors such as stress transmission and binding power are comprehensively considered, so that the model has good adaptability under different working conditions, model parameters are dynamically adjusted, the model responds to changes of environments and construction errors in real time, the weight is automatically adjusted when monitoring data fluctuates, accurate prediction of the bending resistance is achieved, potential failure risks are effectively prevented, and the construction quality is improved. And a failure mode pre-judgment and multi-level risk management mechanism helps a construction team to quickly identify a high-risk area and flexibly adjust a construction scheme.

The invention discloses an assembly type subway station main body structure construction method based on a cover-excavation top-down construction method. Comprising the steps of underground diaphragm wall construction, upper covering soil excavation and pile position drilling, prefabricated pile construction, prefabricated top beam lifting and placing, prefabricated top plate lifting and placing, top beam plate-column joint post-pouring, top plate-side wall joint post-pouring, upper covering soil backfilling, negative first layer earthwork excavation, prefabricated middle beam lifting and placing, prefabricated middle plate lifting and placing, middle beam plate-column joint post-pouring and middle plate-side wall joint post-pouring. Excavating a negative second layer earthwork, pouring a bottom plate cushion layer, prefabricating a bottom beam in place and suspending, binding bottom plate steel bars, post-pouring a bottom plate, and post-pouring a bottom beam column node. A bottom plate is cast in place, a top beam, a top plate, a longitudinal beam and a floor slab are fully prefabricated, and an underground continuous wall and a prefabricated pile serve as temporary enclosure components and also serve as permanent vertical supporting components; and only a simple template needs to be erected, and after the top plate is mounted, the covering soil is backfilled to restore the road surface, so that the construction period is greatly shortened, and the influence of construction on urban traffic and environment is reduced to the minimum.

The invention relates to a composite interactive water-rich stratum efficient grooving ultra-deep underground diaphragm wall and a construction method. The construction method comprises the following steps of cement mixing pile groove wall reinforcement, guide wall foundation steel pipe pile built-in, guide wall novel template system installation, soft soil layer grab bucket grooving, karst cave drilling and grouting, rotary digging drill rock breaking and karst cave backfilling and double-wheel milling groove milling. The method has the beneficial effects that the groove wall is reinforced by the cement mixing piles, so that the groove wall is prevented from collapsing; the assembled drainage device is adopted, so that the construction efficiency is improved; the steel pipe piles are connected with the guide wall, so that the stability of the guide wall is improved; the steel plate groove is used as a guide wall template, so that the template turnover rate is improved; the open type steel box is placed on the groove opening, so that the risk of collapse of the groove wall is reduced; gaps and holes are blocked through drilling and grouting, then guide holes are rotationally excavated, and the karst cave is backfilled with plain concrete, so that the construction problem of grooving at the karst cave is solved; through the cooperation of the steel casing hoisting and positioning device, the construction efficiency of the rotary excavating guide hole is improved.

The invention relates to the field of water conservancy project dams, in particular to a construction method of a dam composite flexible diaphragm wall. 2, equipment is in place; thirdly, wall forming is conducted through a construction method, and the equal-thickness cement soil underground continuous wall is formed; fourthly, the anti-seepage core plate is inserted; the anti-seepage core plate is composed of a body, a plurality of bundles of optical fibers are distributed inside or on the outer surface of the anti-seepage core plate, and the optical fibers extend downwards in the length direction of the body and can monitor environmental changes of the body and the underground diaphragm wall around the body. A continuous and uniform dam composite flexible anti-seepage wall can be formed for a winding dike, the erosion resistance and disturbance resistance of the anti-seepage wall can be improved, the anti-seepage durability is improved, meanwhile, whether a seepage area exists in the continuous wall or not is monitored through the anti-seepage core plate, and early warning is provided for effectively taking precautionary measures in time.

The invention relates to a foundation pit deformation control method and system based on dynamic load compensation, and belongs to the technical field of foundation pit supporting and computers. The foundation pit deformation control method based on dynamic load compensation comprises the steps that S1, a hydraulic supporting unit is arranged on the inner side of a foundation pit supporting pile or an underground diaphragm wall, the pressure of the hydraulic supporting unit and the displacement amount of the supporting pile or the underground diaphragm wall are monitored in real time, and the supporting force needing to be provided by the hydraulic supporting unit is calculated; s2, foundation pit soil strain data are monitored in real time, vehicle position, speed and load data are obtained, and a dynamic load distribution model is constructed; and S3, constructing a foundation pit deformation prediction model by using an LSTM neural network, and predicting the influence trend of vehicle passing on foundation pit deformation so as to adjust the supporting force of the supporting structure in advance and automatically optimize the vehicle path at the same time. According to the method, deformation is actively controlled through a dynamic compensation mechanism, construction safety and stability of surrounding facilities are guaranteed, and the method is particularly suitable for sensitive areas adjacent to underground facilities or important buildings.

The disclosure relates to a soil processing apparatus, in particular diaphragm wall cutter, for creating a trench, which apparatus is connectable to a work-performing machine, comprising a frame extending along a longitudinal axis, which has a rectangular cross-section transverse to the longitudinal axis, a soil processing tool arranged on a lower section of the frame, a clamping device with at least two clamping elements arranged on opposite sides of the frame, which are actively adjustable relative to the frame in order to press the clamping elements against inner walls of a trench, and a feed device for generating a feed force on the soil processing tool within a trench, by means of which the clamping elements and the frame can be actively adjusted relative to each other along the longitudinal axis.

The invention relates to an underground diaphragm wall groove section foundation cleaning and slurry replacement device and method. Besides a driving function, mobile driving equipment is loaded with an air pump and a slurry suction pump, is connected with a slurry pipe and an air pipe, and realizes slurry replacement by a pump suction reverse circulation method; the slurry pipe is wound on the slurry pipe disc and is hung in the groove section through the guide frame; the viscometer and the densimeter are fixed at the tail end of the slurry pipe, are connected to a control panel in the operation room through an electronic circuit tightly attached to the outer wall of the slurry pipe, and are used for accurately testing the viscosity and specific gravity parameters of the slurry; the slurry pipe disc is mechanically controlled to rotate, so that the slurry pipe is controlled to sink and lift; the control panel is in driving connection with the slurry pipe disc and controls the slurry pipe to be lowered, lifted and stopped. The device replaces a simple slurry taking device to extract slurry for ground detection, and the working efficiency is greatly improved; slurry detection and slurry replacement are combined, pertinence of ground wall foundation cleaning and slurry replacement is improved, and the stability of a ground wall groove section and the quality of ground wall engineering are greatly improved.

The invention provides a stability calculation method and system for an underground diaphragm wall of a subway station. The stability calculation method comprises the following steps: S101, obtaining a construction plan of the underground diaphragm wall; s102, a construction acquisition device is used for measurement, and pouring depth data of a current construction groove section and liquid level data of a dewatering well corresponding to the current construction groove section are obtained in real time; s104, after pouring of the current construction groove section is completed, perpendicularity data of the side wall of the construction groove section is obtained through an ultrasonic detection device, and when the perpendicularity data is within the corresponding preset range, a change curve of the perpendicularity data and the pouring depth data and a change curve of the liquid level data are input into the stability scoring model; and the next construction groove section serves as the current construction groove section, and S102 is executed. The stability calculation in the construction process of the underground diaphragm wall is realized by comprehensively considering the change of the perpendicularity data and the pouring depth data and the liquid level data.

The invention relates to a deep foundation pit reinforced concrete support-steel pipe support combined system and a construction method, a steel pipe support and an underground diaphragm wall are temporarily mounted and fixed by prearranging components such as anchor bolt holes, support embedded parts and diagonal draw bars, on the basis of ensuring the mounting quality, the construction cost is reduced, the construction convenience is improved, and the construction efficiency is improved. The temporary components can be recycled, and the good environmental protection property is achieved; a steel latticed column and a cast-in-situ bored pile reinforcement cage are welded and anchored in a pile foundation, a channel steel coupling beam is welded and installed on a bracket to form a deep foundation pit stand column supporting system, the stability of foundation pit supporting is guaranteed, and then construction safety is guaranteed; the dragging type steel column is adopted for applying prestress to replace the latticed column needing to be cut off, and the influence on a permanent structure is small in the construction process.

The invention belongs to the technical field of building construction, and discloses an underground diaphragm wall reinforcing mesh welding spot positioning method, which is used for positioning intersection points of transverse bars and longitudinal bars in a reinforcing mesh, and comprises the following steps: firstly, establishing a three-dimensional coordinate system, and obtaining a three-dimensional point cloud data set of the reinforcing mesh; then three-dimensional point cloud data in the three-dimensional point cloud data set is preprocessed, and a preprocessed point set is obtained; secondly, for each point in the preprocessing point set, the slope value of a connecting line between every two adjacent points is solved in sequence, and information of intersection points of the transverse bars and the longitudinal bars is obtained according to changes of the slope values; and finally, a fixed distance is deviated on the basis of the intersection point position to obtain a welding point position, and the welding output end of the welding device is moved to the welding point position to achieve welding. Through the arrangement, the welding spot positioning method for the reinforcing mesh of the underground diaphragm wall can efficiently and accurately realize welding spot positioning and welding operation of the reinforcing mesh.

The invention relates to the field of foundation pit enclosure, in particular to a foundation pit enclosure structure and a construction method thereof, the foundation pit enclosure structure adopts the technical scheme of H-shaped steel pile supporting, underground diaphragm wall enclosure, additional tie bar reinforcement, post-pouring concrete forming and anchor rod driving for reinforcement, and the construction method comprises the steps of measuring, paying off and pile fixing positions, hoisting cylindrical steel pipe pier columns and driving H-shaped steel piles; earthwork is excavated in a layered, segmented, interval-divided and module-divided mode, and residual soil on the pile side is cleaned; hoisting a reinforcement cage, adding a tie bar for perforation, and installing an anchoring plate; the profiled steel sheet is fixed, and an anchor rod sleeve is pre-embedded; correcting the additional rib plate, installing a corner profiled steel sheet and pre-burying an anchor rod sleeve; fine aggregate concrete is poured in a segmented mode, and the underground diaphragm wall is formed; strengthening maintenance, arranging anchor rods and fixing the anchor rods; and the steps are repeated until all building envelope construction is completed, and finally overall acceptance check is conducted. The structural design is innovated, and the process method is optimized.

The utility model discloses an underground diaphragm wall joint embedded freezing pipe water stop connector system which comprises a special-shaped water stop steel plate and an embedded reinforcement cage. The special-shaped water stop steel plate is fixed at the joint of the continuous wall, and the middle part of the special-shaped water stop steel plate is a main body steel plate with an X-shaped section; straight steel plates are arranged on the front side and the rear side of the main steel plate respectively and are perpendicular to the guide wall. L-shaped steel plates are arranged on the left side and the right side of the main steel plate respectively, L-shaped inner angles face the main steel plate, L-shaped edges of the left L-shaped steel plate and the right L-shaped steel plate are opposite, a gap is formed between the L-shaped edges of the left L-shaped steel plate and the right L-shaped steel plate, and groove bodies are formed between the left L-shaped steel plate and the main steel plate and between the right L-shaped steel plate and the main steel plate respectively. Reinforcement cages are arranged inside and outside the tank body, and freezing pipes are arranged in the reinforcement cages in the tank body. The reverse buckling structures are formed at the joints through the special-shaped water stop steel plates, the integrity between the underground diaphragm walls is enhanced, and the water stop effect is remarkably improved.

The invention discloses a low-clearance and close-range barrier removal construction method for an existing operation station enclosure structure, which comprises the following steps: S1, underground diaphragm wall construction: S11, underground diaphragm wall groove wall reinforcement: according to the stratum condition, in order to avoid hole collapse in the groove forming process, adopting MJS construction method piles for reinforcement treatment between a barrier removal working well and new and old ground walls of a station, and S12, construction of an underground diaphragm wall; grooving the underground diaphragm wall; s13, hoisting an underground diaphragm wall reinforcement cage; s14, concrete pouring is conducted; s2, crown beam supporting and dewatering well construction; s3, foundation pit excavation and support erection construction are carried out; s4, constructing a lining wall; s5, freezing construction is conducted; s6, barrier removal construction is carried out; and S7, backfilling construction is conducted. The problem that conventional construction cannot meet the construction requirements that the obstacle removing working well is located in a low clearance, adjacent to an operation subway line and a bridge pile and small in space of the obstacle removing working well is solved, obstacle removing work can be safely completed, and operation of the subway line and the viaduct cannot be affected.

The invention relates to the technical field of assembly type building engineering, in particular to a laminated side wall system for an underground station and a construction method of the laminated side wall system, the laminated side wall system comprises a single-face laminated side wall and a double-face laminated side wall, and the single-face laminated side wall or the double-face laminated side wall is selected for construction according to different construction conditions. The single-face laminated side wall is composed of an inner side prefabricated reinforced concrete laminated plate I and a cast-in-place layer I. The double-face laminated side wall is composed of an inner side prefabricated reinforced concrete laminated plate II, an outer side prefabricated reinforced concrete laminated plate and a cast-in-place layer II. When the underground diaphragm wall needs to be adopted for foundation pit supporting, the single-face overlapped side wall is adopted; when the underground diaphragm wall is not needed for foundation pit supporting, the double-face overlapped side wall is adopted. The superimposed side wall system for the underground station and the construction method thereof have the advantages of being high in adaptability, high in construction efficiency, good in connection performance, low in construction cost, convenient to transport and assemble, good in waterproof effect and the like, and are particularly suitable for the field of fabricated building engineering such as the underground station.

The utility model discloses a node connection of a prefabricated underground continuous wall and a cast-in-place composite wall, comprising a prefabricated underground continuous wall, the prefabricated underground continuous wall and the cast-in-place underground continuous wall are fixedly connected, a cast-in-place buttress column is cast inside the connection between the prefabricated underground continuous wall and the cast-in-place underground continuous wall, and a cast-in-place structural side wall is cast inside the cast-in-place underground continuous wall and at the side wall of the cast-in-place buttress column. The utility model adopts a cast-in-place underground continuous wall for support in irregular areas of underground engineering, utilizes the flexibility of the cast-in-place structure, avoids the use of all prefabricated components, and avoids the need to purchase multiple sets of special-shaped molds, which causes an increase in engineering costs. It combines cast-in-place with prefabrication according to local conditions, improves the construction efficiency of the underground engineering enclosure structure, speeds up the construction speed of the underground engineering, and optimizes the allocation of labor. The utility model ensures the strength, integrity, durability and waterproof effect of the node connection position during use.

The invention belongs to the technical field of robot welding, and discloses a welding spot positioning method for an underground diaphragm wall reinforcement cage, which is used for positioning a welding spot between a transverse bar and profile steel, and comprises the following steps: establishing a three-dimensional coordinate system, and obtaining a three-dimensional point cloud data set of the transverse bar and the profile steel, processing the three-dimensional point cloud data set to form a first point set, determining a starting point coordinate of a center line of the connection section according to the first point set, processing the three-dimensional point cloud data set to form a second point set, determining an end point coordinate of the center line of the connection section according to the second point set, and determining the end point coordinate of the center line of the connection section according to the starting point coordinate and the end point coordinate of the center line of the connection section. And determining starting point coordinates and terminal point coordinates of a welding seam between the connecting section and the profile steel. By means of the arrangement, the welding spot positioning method for the underground diaphragm wall reinforcement cage can achieve accurate positioning of the welding spot position, and the welding quality and the operation efficiency can be improved easily.

The invention relates to a construction process for connecting a newly-built underground diaphragm wall with an existing underground diaphragm wall. The construction process comprises the following steps: surveying and mapping an elastic line; selecting a proper obstacle removing machine to perform vertical cutting along the snapping line; boundary invasion obstacles are removed; a newly-built underground diaphragm wall is constructed; and performing waterproof treatment on the joint. According to the construction technology for connecting the newly-built underground diaphragm wall with the existing underground diaphragm wall, the obstacle removing machine is used for removing boundary invasion obstacles such as original concrete bumps or mud cakes at the connecting position of the newly-built underground diaphragm wall and the existing underground diaphragm wall, and then construction of the newly-built underground diaphragm wall is completed; water-stop steel plates are installed and water-stop materials are injected at the joints, so that the seepage-proofing capacity of the joints of the newly-built underground diaphragm wall and the existing underground diaphragm wall can be improved, and water leakage of the joints of the new underground diaphragm wall and the old underground diaphragm wall in the foundation pit excavation process is prevented.

The invention relates to a combined type lifting and defending system and a construction method thereof.The combined type lifting and defending system is provided with an underground anti-impact wall structure, an underground collapse preparing body is arranged on the front side of the underground anti-impact wall structure, a cantilever retaining wall is arranged above the underground anti-impact wall structure, the collapse preparing body is formed by regularly stacking a plurality of collapse preparing body single bodies, and the underground anti-impact wall structure is provided with a main wall body; the main wall bodies are underground diaphragm walls, the number of the main wall bodies is two, the two main wall bodies are parallel to each other, a plurality of tie walls are distributed between the two main wall bodies, and a unified crown beam is arranged on the top of the main wall bodies. The method comprises the following steps: firstly, constructing an underground anti-scour wall structure, after the underground anti-scour wall structure is poured, constructing a collapse preparation body and a cantilever retaining wall, excavating earthwork as required, arranging the collapse preparation body on the front side of the underground anti-scour wall structure, and arranging the cantilever retaining wall on the underground anti-scour wall structure. By constructing the combined dike system, the scour prevention effect can be effectively improved.

The utility model relates to the technical field of underground diaphragm wall construction, and discloses an underground diaphragm wall I-shaped steel joint scraping and brushing type multifunctional wall brushing device which comprises a joint square cylinder, and a connecting port is formed in the top of the joint square cylinder. By the adoption of the universal joint square cylinder for the rotary drilling machine, mounting and dismounting are fast and convenient, the rotary drilling machine is fast to ascend and descend, the wall brushing frequency is high, rapid wall brushing can be conducted by means of the rotary drilling machine, a drill rod of the rotary drilling machine is large in rigidity, the wall brushing device is high in wall brushing scouring force by means of the rotary drilling machine, and concrete blocks can be forcibly removed when encountering the concrete blocks; the steel wire brush is welded and fixed to the wall brushing cylinder, stability is good, rigidity is large, in addition, the bucket teeth and the steel wire brush conduct scraping and brushing alternately, thoroughness of wall brushing is well guaranteed, the wall brushing effect is good, the mode that the rotary excavating connector square cylinder is fixedly connected with the rotary excavating machine drill rod is adopted, the wall brushing device can be repeatedly used, other equipment is not needed, and the cost is low. And the mechanical input cost is saved for a project.

The invention relates to a construction technology for an underground diaphragm wall in a sensitive area. The construction technology comprises the following steps that S1, construction preparation is conducted, and a site is arranged; sa2, setting a slurry system; sb2, measuring and setting out; sa3, slurry is prepared; sb3, guide wall construction; sa4, storing the slurry; sb4, reinforcing the foundation; sa5, recycling and separating the slurry; sb5, grooving excavation and inspection are carried out; sa6, slurry regeneration is carried out; sb6, wall brushing and hole sweeping are conducted on the connector; sc1, manufacturing a reinforcement cage platform; sa7, slurry discarding is carried out; sb7, tank bottom treatment; sc2, manufacturing a steel bottom plate and a reinforcement cage; s8, hoisting the reinforcement cage; s9, hoisting the joint box; s10, a guide pipe is installed; s11, concrete pouring is conducted; s12, the connector box is pulled out; in Sb4, in foundation reinforcement, reinforcing holes are vertically punched downwards in one side of the guide wall at equal intervals, slurry is sprayed to the position under the guide wall in a covering mode in the reinforcing holes in the direction towards the guide wall in a 150-degree rotary spraying mode, and the depth of the reinforcing holes is larger than that of the underground continuous wall. Guniting reinforcement is conducted on the foundation before construction, the grooving quality is improved, and meanwhile the settlement risk is reduced.

A waterproof structure for a panel joint of an underground diaphragm wall includes a first waterstop and a first cover plate. The panel joint is provided with a wall connection plate. The underground diaphragm wall has an excavation surface. In a direction perpendicular to the excavation surface, the wall connection plate is arranged below the excavation surface of the underground diaphragm wall. A first accommodating groove is defined between the wall connection plate and the panel joint and adjacent to the excavation surface. The first waterstop is arranged in the first accommodating groove, and both wings of the first waterstop are respectively and adhesively bonded to the two sides of the panel joint. The first cover plate corresponds to the first accommodating groove and is arranged at the excavation surface. The first cover plate is detachably connected to the underground diaphragm wall.

The invention relates to an automatic in-situ specific gravity detection method for grooving slurry of an underground diaphragm wall, which comprises the following steps: connecting a pressure sensor with a lead and a data line to form a pressure detection belt, sinking the pressure detection belt into a groove section of the underground diaphragm wall, and detecting the pressure of slurry at different depths in the groove section after the pressure detection belt is stable. Slurry pressure data are collected at fixed time intervals and synchronously transmitted to a ground data collection system, according to the collected slurry pressure data, a curve that the slurry pressure changes along with the depth at different time is generated in real time, and finally the slurry specific gravity at different depths and the situation that the slurry specific gravity changes along with the time at the same depth position are obtained. According to the method, the traditional mode that slurry of different depths is collected through a slurry barrel and then the slurry of the groove section is manually detected on the ground is avoided, the specific gravity of the slurry of different depths in the groove section of the underground diaphragm wall is rapidly and conveniently obtained through an automatic in-situ detection means, the labor cost and the detection error are reduced, and the detection efficiency is improved.

The invention discloses a numerical simulation analysis method for a near-river ultra-deep foundation pit under the action of seepage flow, and the method comprises the following steps: S1, constructing a three-dimensional numerical model based on finite element software PLAXIS 3D, and constructing a non-uniform stratum model in combination with a Borehole module; s2, fine modeling is conducted through the underground diaphragm wall, the reinforced concrete supports and the latticed columns; s3, simulating a small strain hardening characteristic and a rigidity attenuation effect of the soil body by adopting an HSS model; s4, simulating underground water flow by combining plastic steady-state seepage analysis, and simplifying the three-axis cement mixing pile into an underground diaphragm wall structure through an equivalent stiffness principle; and S5, step-by-step excavation and support sequential control construction procedures are adopted, and finally, the reliability of the model is verified by comparing a horizontal displacement simulation result of the diaphragm wall with field monitoring data. According to the method, the foundation pit deformation rule is predicted through HSS constitutive model and seepage coupling analysis, and the foundation pit deformation prediction precision is remarkably improved.

The invention relates to the technical field of underground engineering construction, and particularly discloses pebble stratum underground diaphragm wall protecting slurry and a preparation method thereof. The pebble stratum underground diaphragm wall protecting slurry provided by the invention is prepared from the following components in parts by weight: 30 to 50 parts of bentonite, 20 to 30 parts of cement, 5 to 10 parts of shell powder, 3 to 8 parts of carboxymethyl cellulose, 1 to 3 parts of KH792 modified polypropylene fiber and 450 to 500 parts of water, further, the shell powder comprises shell powder with the particle size of 100-200 [mu] m and shell powder with the particle size of 800-1000 [mu] m; the invention further provides a preparation method of the pebble stratum underground diaphragm wall protecting slurry. The pebble stratum underground diaphragm wall protecting slurry provided by the invention is low in cost and good in protecting effect, a formed groove wall is excellent in stability, and the pebble stratum underground diaphragm wall protecting slurry can be prevented from collapsing for 120 hours and can meet the construction requirements of an underground diaphragm wall.

The utility model discloses a permanent and temporary combined assembly type underground structure plate wall connecting node which comprises an assembly type underground diaphragm wall, a full-length steel plate is installed on the side wall of the assembly type underground diaphragm wall, and a prefabricated structure plate is hoisted on the full-length steel plate. The gap between the prefabricated structural slab and the fabricated underground diaphragm wall is filled with ultra-high-performance concrete, and a steel bar structure is arranged in the ultra-high-performance concrete. According to the utility model, the rigid connection between the two prefabricated parts is realized, the integrity of the structure is improved, and the safety and durability of the underground structure are fully ensured; an underground diaphragm wall which is usually used as a temporary structure is changed into a permanent structure, so that the construction period is shortened, and the investment is saved; the ultra-high performance concrete poured in the joint can greatly shorten the anchoring length of the steel bars, enlarge the arrangement distance of the steel bars, obviously reduce the using amount of the steel bars on site and the binding workload, is convenient to install and simple in process, obviously improves the construction efficiency, and has high popularization and application value.

The utility model provides an underground diaphragm wall retaining wall mud film detection test device under unfavorable geological conditions. The device comprises a rack; the multi-layer soil body model box is arranged at the lower part of the rack, and at least two soil body model boxes in the multi-layer soil body model box are different in soil texture; one end of the grooving simulation part is inserted into the bottom of the multi-layer soil body model box; the lifting component is arranged at the top of the rack, is connected with the grooving simulation component and is used for driving the grooving simulation component to lift; and each grouting pump is internally provided with slurry with different proportions, each layer of soil body model box is connected with one grouting pump through a grouting pipe, and the number of the grouting pumps is smaller than the number of layers of the multi-layer type soil body model box. According to the utility model, the multi-layer soil body model box and the plurality of slurry grouting pumps with different proportions are arranged, so that the quality of slurry under various unfavorable geological conditions or the quality of a mud film formed by various types of slurry and a soil body can be detected at the same time, and the film forming quality of the slurry and whether the slurry can become a screening standard of the mud film can be accurately grasped.

The invention relates to a water-rich thick sand layer combined anti-streaming ultra-deep underground diaphragm wall and a construction method thereof. Comprising a slurry stopping iron sheet pre-opening technical system, a joint box side wall long sand bag sand flushing gap backfilling and compacting technical system, a back profile steel and ballasting combined bottom anti-streaming technical system, a fore shaft pipe and sand bag matched filling anti-streaming technical system and an underground diaphragm wall profile steel joint wall brushing technical system. The construction efficiency of the water-rich thick sand layer combined anti-streaming ultra-deep underground diaphragm wall can be improved, and the engineering quality and safety are guaranteed.

The utility model discloses a device for preventing turbulent flow in the pouring process of an underground diaphragm wall, which relates to the field of constructional engineering, and comprises an H-shaped steel body and a reinforcing steel bar group, the H-shaped steel body comprises a web plate and a wing plate, and the section sizes of the opposite surfaces of the H-shaped steel body and pre-buried H-shaped steel are the same; the multiple steel bar sets are located on the side, close to the embedded H-shaped steel, of the H-shaped steel body and extend out of the H-shaped steel body, each steel bar set comprises two steel bars with the same size specification, and the two steel bars of each steel bar set are symmetrically fixed to the inner side and the outer side of the web or the wing plate correspondingly. And an elbow is arranged at one end, extending out of the H-shaped steel body, of the steel bar. The underground diaphragm wall is conveniently butted and fixed with the pre-buried H-shaped steel, and turbulent flow in the pouring process of the underground diaphragm wall is effectively prevented; meanwhile, the structure is simple, manufacturing is convenient, and reutilization can be achieved.

The invention relates to a method for automatically monitoring construction of an ultra-deep underground diaphragm wall in the whole process of a strong permeable stratum, and aims to solve the problems that the ultra-deep underground diaphragm wall in the strong permeable stratum is low in construction precision, easy to collapse, lack of real-time monitoring and the like. Five technical systems are used for synergistically solving the problems that (1) a lower suspended beam, a reserved post-cast strip and an inverted bracket structure are adopted in the blocking wall technical system, so that the impermeability is enhanced; (2) the detachable reinforcement cage supporting system improves rigidity and hoisting safety through modular truss supporting; (3) the verticality ultrasonic detection system realizes high-precision detection of the guide wall by using an ultrasonic signal; (4) the structural steel wall-attached inner bracket system prevents the guide wall from cracking through adjustable support; and (5) the automatic monitoring system integrates multiple sensors to monitor displacement and temperature in real time and performs cloud early warning. Through multi-technology fusion, the construction efficiency and quality are remarkably improved, and the method is suitable for ultra-deep underground diaphragm wall construction under complex geological conditions and has the advantages of being high in anti-permeability, controllable in deformation, capable of achieving real-time early warning and the like.

The invention discloses a pre-supporting structure and an installation method, the pre-supporting structure is formed by connecting a plurality of supports through vertical connecting rods and connecting nodes, and the installation elevation of the lowest support is lower than the bottom of a foundation pit; the enclosure structure is composed of an underground diaphragm wall, an outward protruding device, soft filler, a U-shaped steel plate and a stiffening plate, the outward protruding device is vertically fixed along the inner side of the underground diaphragm wall, the U-shaped steel plate and the stiffening plate are fixed to the end of the outward protruding device, and a groove of the U-shaped steel plate is filled with the soft filler; and the groove mechanism comprises a groove and a backfill material. According to the pre-supporting structure and the mounting method, a support can be mounted before earth excavation and precipitation, and horizontal counter force is applied to the enclosure structure, so that the effect of providing the support counter force first and then carrying out earth excavation is achieved, the sequence of earth excavation and support construction of the foundation pit is thoroughly changed, the support counter force can be provided for the part below the bottom of the foundation pit, and the construction efficiency is improved. And horizontal deformation of the foundation pit can be remarkably reduced, and environmental protection is facilitated.