276 results about "Slurry wall" patented technology

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 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 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 discloses a post-grouting anti-seepage device for an underground diaphragm wall, which comprises a grouting steel pipe welded at a corner of an I-shaped steel joint of the underground diaphragm wall. The grouting steel pipe comprises a seamless steel pipe, a grout outlet steel pipe and a sealing iron sheet, and the seamless steel pipe is a main body of the grouting steel pipe and forms a grouting main channel; the slurry outlet steel pipe is a branch pipe welded on the seamless steel pipe at a certain interval to form a slurry outlet; and the sealing iron sheet covers the outer side of the slurry outlet steel pipe through spot welding. The grouting steel pipes are pre-buried at the corners of the I-shaped steel, post-grouting is carried out after concrete pouring of the underground diaphragm wall is completed, and through mud joints which are not cleaned up in the I-shaped steel joints are blocked. The construction method is easy to operate, low in manufacturing cost, low in requirement for a construction site, high in reliability and good in grouting, water stopping, seepage preventing and leaking stoppage effects, the waterproofness of the I-shaped steel joint of the underground diaphragm wall can be effectively improved, and a powerful guarantee is provided for the safety of foundation pit construction.

The invention discloses a risk control method for the influence of foundation pit dewatering excavation on an adjacent subway tunnel, and the method comprises the steps: constructing a three-dimensional fluid-solid coupling model which comprises an underground diaphragm wall, a supporting system and a subway tunnel; the rainfall excavation process is simulated step by step, and the tunnel displacement risk is evaluated; and risk control is carried out by optimizing a precipitation scheme, improving an excavation time sequence and strengthening monitoring feedback. According to the method, the three-dimensional fluid-solid coupling model is established, dynamic monitoring data feedback is combined, the comprehensive influence of bilateral foundation pit dewatering excavation on the subway tunnel is comprehensively evaluated, the evaluation precision and real-time performance are improved, and construction safety and subway operation stability are ensured.

The invention relates to the technical field of civil engineering monitoring and evaluation, and provides a comprehensive pipe gallery underground diaphragm wall external soil pressure data evaluation method and system, and the method comprises the steps: analyzing and recognizing a specific mechanical response region of a comprehensive pipe gallery underground diaphragm wall; aiming at a specific mechanical response area, establishing a mechanical correction rule; acquiring monitoring data of a soil pressure sensor, and calculating an initial soil pressure predicted value of a measuring point position corresponding to the monitoring data according to a classic soil pressure theory; according to the position of the measuring point, whether the measuring point is located in a specific mechanical response area or not is judged, the initial soil pressure predicted value is adjusted based on a mechanical correction rule, and a corrected soil pressure predicted value is obtained; and comparing the monitoring data with the corrected soil pressure predicted value to obtain a numerical comparison result, and judging whether the monitoring data is abnormal or not according to the numerical comparison result. The method has the effect of improving the safety of long-term operation of the comprehensive pipe gallery.

The invention relates to the technical field of image analysis, in particular to a health management system for the real-time safety state of a foundation pit supporting structure, and the system comprises a three-dimensional scene point cloud construction module which synchronously collects left and right camera images and preset camera parameters, calculates the parallax value of each pixel, and transmits the parallax value to a display module; and according to the parallax value of each pixel, the pixel coordinate and the internal and external parameters of the camera. According to the method, pixel-level parallax extraction and camera parameters are combined, the three-dimensional space coordinates of the underground diaphragm wall are calculated, spatial reconstruction of high-density point locations on the surface of the structure is achieved, a reference form capable of being tracked quantitatively is constructed, and corresponding point iterative registration and normal offset analysis are introduced, so that the accuracy of the method is improved. A real deformation track of a wall body can be extracted from tiny deformation, a deviation value set which is highly coupled with a structure state is constructed, a pixel point extraction strategy aiming at anchor rod wall construction characteristics is adopted at a node level, and real space coordinates of constructed nodes are locked.

The invention relates to a device and method for a jet flow coordinated heading machine to penetrate through an underground diaphragm wall, the device for the jet flow coordinated heading machine to penetrate through the underground diaphragm wall comprises a cutter head, a cutter head cutter and a telescopic spray head, the cutter head cutter is arranged on the cutter head, the cutter head is provided with a telescopic hole position used for installing the telescopic spray head, and the axis of the telescopic hole position extends in the front-back direction; a reciprocating driving mechanism is installed in the telescopic hole site and used for driving the telescopic nozzle to stretch and retract front and back along the telescopic hole site. The telescopic nozzle can realize advanced rapid cutting of a front reinforcing steel bar structure, so that stirring and aggregation of reinforcing steel bars during rotary cutting of the cutterhead cutter are avoided, the cutting length of the reinforcing steel bars is reduced, and smooth deslagging of a spiral conveyor of the tunnel boring machine is facilitated; the technical problems that steel bars are difficult to cut and the cutting length of the steel bars is large in the process that an existing tunnel boring machine penetrates through an underground diaphragm wall are solved.

The utility model relates to the technical field of groove wall reinforcing construction, in particular to a double-wheel stirring drilling machine which comprises an engineering vehicle and a drilling machine base, a machine frame is arranged on one side of the drilling machine base, a drilling rod is arranged on one side of the machine frame, a lifting machine corresponding to the drilling rod is arranged on the machine frame, a groove milling machine is arranged at the bottom of the drilling rod, and an inclinometer is arranged on the groove milling machine. At least two groups of milling wheels are arranged on the slot milling machine; the bottom of the rack is hinged to the drilling machine base, a connecting frame is arranged on one side of the middle of the rack, a stabilizing rod is arranged between the connecting frame and the drilling machine base, a steel cable is connected to the top end of the drilling rod, and a winch is arranged on one side of the engineering truck. According to the utility model, the milling wheel is used for forming a cement-soil mixing pile with a rectangular groove section in a horizontal axial rotary mixing manner, and a single-shaft or multi-shaft mixing drilling tool is replaced to vertically rotate, so that a cylindrical cement-soil mixing pile is formed, and a wavy surface is prevented from appearing after an underground continuous wall is poured and formed.

This application relates to the technical field of building construction, and in particular to a waterproof structure for diaphragm walls. It includes a wall body consisting of multiple diaphragm walls pre-cast on the sidewalls of a foundation pit, and a sealing assembly for sealing the joints between adjacent wall sections. The sealing assembly includes a connector disposed between the two adjacent wall sections. The connector includes a web plate disposed between the end faces of the two adjacent wall sections and a pair of symmetrically arranged flanges on both sides of the web plate. The web plate is perpendicular to the flanges, and the flanges are located on both sides of the joint between the two adjacent wall sections and are abutted against the sides of the wall. The web plate and the flanges form a pair of mounting grooves for installing the wall ends. Precast reinforcing bars are provided on the end faces of the two adjacent wall sections facing the web plate. The web plate is welded to the reinforcing bars, and mortar for connection with the wall can be poured into the mounting grooves. This application improves the sealing effect at the joints of diaphragm walls and prevents leakage problems.

The invention provides a mechanical obstacle removing method and system for a shield crossing section steel joint underground diaphragm wall. The method comprises the following steps: firstly, determining a wall section to be subjected to obstacle removing and a section steel joint in a shield crossing range; then, a vertical drill hole is formed in the position, away from one side of the foundation pit, of the underground diaphragm wall, an all-casing full-slewing drilling machine is adopted for conducting segmented drilling on wall concrete and profile steel joints in the wall concrete, segmented cutting and taking out are conducted, and the vertical obstacle removing hole is backfilled; a horizontal or nearly horizontal drill hole is formed in the position, close to one side of the foundation pit, of the underground diaphragm wall, a horizontal diamond drilling machine is adopted for cutting and taking out the profile steel connector within the range of the shield tunnel portal, and a horizontal obstacle removing hole is blocked or backfilled; and finally, shield tunneling machine crossing construction is implemented. According to the method, the obstacle removing target is clear, side-by-side mechanical obstacle removing of the underground diaphragm wall with the section steel joints can be achieved under the conditions that a large-diameter obstacle removing well is not constructed and underground excavation manual obstacle removing is not carried out, and the method is verified through indoor and field tests and is suitable for being used in subway station crossing projects with limited fields.

This invention discloses a pre-positioned steel support system suitable for small, ultra-deep foundation pits, comprising several lattice columns, several connecting devices, pre-positioned steel supports, several steel strands, several through-hole jacks, several servo cylinders, and a hydraulic system. The pre-positioned steel supports include a steel waler and several corner horizontal braces set at the four corners of the steel waler. Several servo cylinders are spaced along the circumference of the steel waler on its outer surface. The servo cylinders extend and retract under the action of the hydraulic system to achieve active deformation control of the diaphragm wall. Several through-hole jacks, under the action of the hydraulic system, simultaneously raise and lower the pre-positioned steel supports by synchronously extending and retracting the corresponding steel strands. This invention enables a construction method of pre-positioning concrete or steel supports for simultaneous excavation, lowering, and support, effectively shortening the construction period and reducing the time without support during over-excavation. It has advantages such as high mechanization, strong construction safety, and high turnover rate.

The utility model relates to a vertical hole grinding drill for replacing large-aperture coring in an obstacle breaking area of an underground diaphragm wall, and solves the problems that the underground diaphragm wall is of a high-strength reinforced concrete structure, the drilling diameter is large, the drilling depth is large, and a traditional coring drill bit is insufficient in transmission torque in the process of drilling a construction hole in the underground diaphragm wall. The device comprises a drill bit, a drill rod is connected to the upper portion of the drill bit, the drill bit comprises a connecting section, a sleeve section and a grinding section from top to bottom, a grinding disc is arranged at the bottom of the grinding section, annular teeth are arranged on the circumference of the bottom face of the grinding disc, a plurality of grinding heads are distributed in the middle of the bottom face of the grinding disc, and water injection holes are formed in the positions, at gaps of the grinding heads, of the bottom face of the grinding disc. And an overflow slurry discharging channel is formed between the outer wall of the drill bit and the drill hole. The grinding head is arranged on the grinding disc on the bottom surface of the drill bit and is matched with an annular tooth structure of an original coring sleeve to grind the bottom surface of a drill hole and slowly push the drill hole, so that the drilling construction requirements of large-depth and high-strength materials are met.

The invention discloses a reverse construction method for a pile foundation. The reverse construction method comprises the following steps that firstly, a three-shaft stirring pile and an underground diaphragm wall are constructed; secondly, integrated construction of the engineering piles and the reverse construction supporting columns is carried out; thirdly, structural beams and structural plates of the first layer of the tower projection area are constructed, and unearthing is conducted on a non-tower projection area; fourthly, upper-layer structures continue to be constructed layer by layer upwards in the tower projection area, structural beams and structural slabs of the negative first layer are completed at the same time, and first-layer beam slabs of a non-tower area are constructed; fifthly, the area between the continuous walls continues to be unearthed downwards, and a bottom plate bearing platform, an anchor rod and a bottom plate of the underground bottommost layer are constructed to complete bottom sealing; and sixthly, construction continues to be conducted upwards in the tower projection area till the top of the tower is sealed, and structural construction from the negative second floor to the bottommost floor continues to be completed layer by layer according to the construction mode of the negative first floor. By means of the method, the engineering piles and the reverse supporting columns are integrally constructed, then protruding bottom sealing is achieved, the working procedure can be simplified, and the construction efficiency can be improved.

The invention provides a long-distance horizontal freezing hole structure capable of passing through underground obstacles and a construction method of the long-distance horizontal freezing hole structure, and provides a matched horizontal freezing hole structure and a construction method of the matched horizontal freezing hole structure aiming at a poor stratum of a water-rich sand layer and a construction pain point of a newly-built tunnel passing through an existing station. A special drilling tool is used for penetrating through obstacles such as an underground diaphragm wall and a cast-in-place pile, large-diameter freezing pipes are adopted for screw thread welding connection, and the freezing pipes are constructed in a two-way mode to be arranged in a lap-joint staggered-layer mode and supplemented with retesting and deviation rectifying. The problems of long-distance hole forming deflection, high construction risk, poor frozen body forming and the like are solved, it is guaranteed that the frozen hole smoothly penetrates through obstacles, the frozen wall is accurately crossed and formed, a safe space is provided for manual obstacle removing work, and meanwhile the construction requirements of similar horizontal drilling engineering are met.

The utility model discloses an underground diaphragm wall anchor rod reserved casing pipe structure which comprises a reserved casing pipe, the reserved casing pipe is fixedly arranged in an underground diaphragm wall reinforcement cage, a water stop ring is fixedly arranged on the outer side of the reserved casing pipe, an anchor rod body is movably arranged in the reserved casing pipe, and a sealing plate is welded to the outer side of the bottom end of the reserved casing pipe. A limiting plug is welded to the top end of the reserved sleeve, a through hole is formed in the limiting plug, an anchor rod body is movably arranged in the through hole, an upper grouting pipe is welded to the side, facing upwards, of the reserved sleeve, a lower grouting pipe is welded to the side, facing downwards, of the reserved sleeve, and the upper grouting pipe and the lower grouting pipe both communicate with the interior of the reserved sleeve. The upper grouting pipe and the lower grouting pipe are both arranged to be in an L shape. By arranging the upper grouting pipe and the lower grouting pipe, after anchor rod construction is completed, the reserved sleeve can be fully filled with cement paste, then the anchor rod can be placed in a closed space, and water is effectively prevented from invading a gap between the anchor rod and a hole wall.

An excavation machine contains a base machine and an excavation tool. The base machine contains a truck; a turret rotating with respect to the truck; at least one winder for at least one service line, positioned on the turret; and an arm hinged to the turret at a base end of the arm to be rotatable and inclinable with respect to the turret. The arm supports plural head pulleys at a head end opposite to the base end. The excavation tool hangs from the arm and is supported by at least one flexible suspension element windable and unwindable on a winding / unwinding assembly associated with the base machine. The winding / unwinding assembly contains two coaxial drums. A respective branch of the at least one flexible suspension element originates from each drum, passes over at least one head pulley, and is connected to the excavation tool.

This utility model discloses a bolted connection joint structure for precast concrete wall panels using steel strands. The aim is to provide a convenient installation and connection method for precast concrete wall panels, effectively solving the problem that the forces on the joint structures of existing precast concrete diaphragm walls are concentrated at the ends of the precast concrete wall panels, leading to cracking at the ends. The structure includes: an anchoring assembly comprising two anchors fixed to both ends of the precast concrete wall panel, with steel strands embedded within the precast concrete wall panel. The ends of the steel strands are anchored within the two anchors of the corresponding anchoring assembly, and the anchors have connecting screw holes; and a variable-diameter screw corresponding to each anchor, comprising a first screw section and a second screw section coaxially distributed, the outer diameter of the first screw section being larger than that of the second screw section, and the first screw section being connected to the connecting screw hole of the corresponding anchor.

This invention provides a slurry removal device for diaphragm walls, belonging to the technical field of slurry removal equipment. The diaphragm wall slurry removal device of this invention includes a transport mechanism, a slurry removal mechanism, and a conveying mechanism, and may also include a controller. The transport mechanism provides the power for movement; the slurry removal mechanism performs the slurry removal work; and the conveying mechanism receives and transports the slurry removed by the slurry removal mechanism and discharges it from the slurry removal device. By setting up the transport mechanism, the slurry removal device can move forward above the diaphragm wall. By setting up the slurry removal mechanism, the slurry can be removed during the movement of the slurry removal device. The slurry removed is then transported and discharged from the slurry removal device by the conveying mechanism. This allows the slurry removal device to replace manual slurry removal work, effectively reducing labor costs and improving work efficiency, which is conducive to accelerating the construction period. In addition, treating the slurry before the concrete solidifies can avoid damage to the wall caused by chiseling work, which is beneficial to improving construction quality.

The utility model relates to the field of slurry wall protection drilling, especially relates to a slurry separation tank for reverse circulation drilling machine, including primary sedimentation tank, secondary sedimentation tank, residue storage tank, slurry input pipe, sand separating mechanism and slurry output pipe, secondary sedimentation tank is connected with primary sedimentation tank, residue storage tank is connected with secondary sedimentation tank, and the lateral wall of primary sedimentation tank is provided with overflow, and overflow is communicated with secondary sedimentation tank, slurry input pipe is connected with primary sedimentation tank, and slurry input pipe is used for injecting slurry to primary sedimentation tank, sand separating mechanism is connected with secondary sedimentation tank, and sand separating mechanism is communicated with residue storage tank, slurry output pipe is communicated with secondary sedimentation tank, and the sludge suction efficiency in secondary sedimentation tank is increased by setting conical fairing on the circulating pipeline, the slurry that is extracted from pile foundation hole is discharged into primary sedimentation tank through slurry input pipe and carries out preliminary deposition, the slurry after preliminary deposition enters secondary sedimentation tank through overflow, and the drilling residue of smaller particle is removed by slurry through sand separating mechanism.

The application discloses an assembled underground continuous wall, and relates to the technical field of foundation pit support, which comprises a wall body, a plurality of protrusions are arranged along the wall thickness direction on one side of the wall body along the assembling direction, a plurality of recesses are arranged along the wall thickness direction on the other side of the wall body along the assembling direction, and the plurality of protrusions of one wall body can be inserted into the plurality of recesses of an adjacent wall body one by one; a first half groove is arranged on the bottom wall of the recess, a second half groove is arranged on the side wall of the protrusion, the first half groove and the second half groove are communicated after the adjacent two wall bodies are spliced, and a waterproof device is arranged in the area surrounded by the first half groove and the second half groove. The application has the effect of improving the water seepage of the joint of the assembled underground continuous wall.

The invention discloses a self-adaptive guide pipe burial depth regulation and control system and method for underground diaphragm wall pouring construction. The system comprises a concrete pump truck, a guide pipe, a guide pipe lifting device, a monitoring module and a guide pipe burial depth control module. The conduit lifting device is used for lifting the conduit; the guide pipe burial depth control module is used for controlling the pump pipe lifting device to work; a concrete pump, a pump pipe, a pump pipe lifting device and a pump pipe control module are arranged on the concrete pump truck; the pump pipe lifting device is used for lifting the pump pipe; the pump pipe control module is used for controlling the concrete pump and the pump pipe lifting device to work; the monitoring module monitors and collects state data related to the depth of the pump pipe inserted into the guide pipe, the concrete liquid level elevation and the guide pipe burial depth parameter in real time. And the conduit burial depth control module receives and processes monitoring data from the monitoring module, shares data with the pump pipe control module, and outputs a signal to control the conduit lifting device to lift the conduit, so that the conduit burial depth is kept within a set range. The method is suitable for high-depth continuous wall pouring underground engineering.

The invention relates to an underground diaphragm wall construction method, belongs to the technical field of deep foundation support construction in building construction, and mainly solves the technical problems of groove wall collapse and large sediment control difficulty caused by unstable slurry performance in the grooving process of an underground diaphragm wall. The method comprises the steps that a reinforced concrete guide wall is used for guiding, a hydraulic grab bucket is used for excavating a groove section with the length of 6-8 m and the depth of 20-50 m, the density and viscosity of slurry are monitored in real time, bentonite slurry is added so that the density can be maintained to be 1.1-1.3 g / cm < 3 >, and a carboxymethyl cellulose solution is added so that the viscosity of a Markov funnel can be maintained to be 40-50 s; and after hole cleaning, the sediment thickness is ensured to be smaller than 100 mm, then a reinforcement cage is put down, and underwater concrete is poured through a guide pipe method. The method can effectively guarantee the stability of the groove wall and the concrete pouring quality, improves the integrity and anti-seepage performance of the wall body, and is mainly used for deep foundation pit supporting, underground structure anti-seepage and bearing wall construction.

This invention provides a method for constructing a disturbance-proof support structure for a deep foundation pit of a subway station, comprising: Step S1, constructing a temporary partition in the middle of the foundation pit and simultaneously constructing on both sides of the temporary partition; Step S2, constructing a diaphragm wall; Step S3, performing dewatering treatment; Step S4, installing formwork and pouring concrete for the capping beam; Step S5, constructing a retaining wall on top of the capping beam; Step S6, excavating from the temporary partition towards both ends of the foundation pit, longitudinally segmented and vertically layered, using a supported excavation method; Step S7, simultaneously removing the temporary partition and excavating to the foundation as the excavation progresses. Dividing the foundation pit using temporary partitions achieves regionalized excavation. The stability of the foundation pit is ensured by the support provided by the temporary partitions during excavation. Simultaneous excavation on both sides significantly improves construction efficiency. Simultaneous removal of the temporary partitions during excavation ensures the reliability and stability of the foundation pit support structure system.

The application provides a multifunctional waterproof structure water vapor permeability comprehensive test device. It belongs to the technical field of building material water vapor permeability testing. The non-uniform water pressure simulation and application system can truly simulate the triangularly distributed hydrostatic pressure borne by the wall in underground engineering through the cooperative design of the tiltable rigid support frame and the pressurized liquid. The test piece installation and inclination adjustment system can simulate the underground continuous wall or the slope retaining wall with different inclinations by adjusting the inclination of the rigid support frame. The non-uniform water pressure simulation and application system can simulate various groundwater conditions from low water level to high water level by adjusting the set value of the fluid pressure system. It can cover various liquid water permeation scenarios, has wide test range and strong applicability. The environment simulation and moisture permeability test system can realize the integrated test and flexible switching of the liquid water barrier and the gaseous water migration performance, complete the test of the two modes on the same test piece in turn, has strong data comparability and high test efficiency.

The utility model relates to the technical field of foundation pit engineering, in particular to a ring beam hanging structure, which comprises an inner ring beam and outer ring beam connecting structure and an underground diaphragm wall hanging structure, the inner ring beam and outer ring beam connecting structure is arranged between an inner ring beam and an outer ring beam, and the inner ring beam and the outer ring beam are connected and fixed to form an integral structure. The underground diaphragm wall is fixedly connected with the outer ring beam through the underground diaphragm wall hanging structure. The utility model has the advantages that not only is the cost for additionally erecting the upright post below the inner ring beam saved and the construction cost optimized, but also a stable working surface is provided and the construction safety and efficiency are ensured; in addition, the suspension structure is high in adaptability and construction efficiency, and an economical, efficient and safe solution is provided for foundation pit construction in urban renewal.

The application relates to the technical field of construction engineering and discloses a diaphragm wall supporting structure, which comprises a back plate, a front plate and a wall body for mounting the back plate and the front plate, characterized in that a plurality of notches are arranged on one side of the back plate and one side of the front plate, a connecting assembly is arranged on the wall body, the connecting assembly comprises a plurality of connecting rods, the connecting rods are inserted into the wall body, the two ends of the plurality of connecting rods are fixedly connected with connecting plates, the connecting plates are clamped with the notches, and a mounting cylinder is fixedly inserted between the two connecting plates; one side of the front plate is fixedly connected with a supporting structure, the supporting structure comprises two mounting plates, and the mounting plates are fixed on the front plate through bolts. The back plate and the front plate are fixed together through the connecting assembly, so that the stress area of the supporting structure when supporting the wall body is increased, the supporting structure and the connecting assembly are more firmly connected, and the fracture between the supporting structure and the connecting assembly is avoided.

The utility model belongs to engineering construction technical field discloses a kind of diaphragm wall construction protection devices, it protects guide wall in diaphragm wall construction process, and diaphragm wall construction protection device includes support frame and limit plate, support frame includes bottom plate and inclined plate, inclined plate is connected on bottom plate, and with bottom plate angle setting, two support frames are connected with adjusting assembly, to can make two inclined plates opposite, adjusting assembly can adjust the distance between two support frames;Limit plate is set on the side of bottom plate away from inclined plate, and limit plate is vertically arranged with bottom plate;When underground continuous wall grooving, the grab bucket of grooving machine is close to guide wall and can be blocked by inclined plate, and be guided by inclined plate, guide to between two support frames, to reduce the possibility of guide wall damage, improve the construction quality of diaphragm wall.

The invention discloses a multi-sealing water stop structure for an underground diaphragm wall joint and a water stop method thereof, and relates to the field of diaphragm wall joint sealing, the multi-sealing water stop structure comprises a first joint pipeline and a second joint pipeline, and further comprises an agent outlet sealing mechanism used for performing agent spraying sealing on the joint of the first joint pipeline and the second joint pipeline; according to the multi-sealing water stop structure for the underground diaphragm wall joint and the water stop method of the multi-sealing water stop structure, the water seepage condition is detected through the automatic switching mechanism, the rotary driving part is triggered to work, the joint of the underground diaphragm wall joint can be sealed timely and automatically during water seepage, leaked water is effectively prevented from entering a pipeline, and the service life of the underground diaphragm wall joint is prolonged. Compared with a mode of sealing and water stopping through sealing materials such as a rubber water stop belt and a water swelling strip, the phenomenon that the sealing performance is reduced and leakage occurs due to aging and damage of the sealing materials as time goes on is avoided, and therefore underground water can be effectively prevented from permeating.

This application provides a combined installation frame device for HDPE membranes used in diaphragm walls. The combined installation frame device includes a combined installation frame body, which comprises an upper part, a middle part, a lower part, and a bottom part connected sequentially from top to bottom. The upper part includes a tensioning main frame; the middle part includes at least one standard main frame; the lower part includes at least one adjusting main frame; and the bottom part includes a counterweight fixing main frame. A first tension ring is provided at the top of the HDPE membrane, and a counterweight block is connected to the bottom. The counterweight block has an insertion hole. A second tension ring is provided on the tensioning main frame. The first and second tension rings are connected by a tensioning device. A positioning pin is provided at the bottom of the counterweight fixing main frame. The positioning pin can be movably inserted into the insertion hole. This combined installation frame device for HDPE membranes in diaphragm walls is convenient to assemble, reuse, transport, and transfer, and can meet the needs of different installation depths.