CN114517499A - Rectangular cross section friction pile pit excavation construction system - Google Patents

Abstract

The invention discloses a shaft pit tunneling construction system for an anti-slide pile with a rectangular cross section, which comprises the following components: facility branch system, a buttress subassembly and tunnelling branch system outside the foundation ditch, foundation ditch outside construct the branch system and include foundation ditch concrete platform, support frame and gallows subassembly, the gallows subassembly is movably connected in the support frame, sets up on the loop wheel machine subassembly and rises to rise the device. The buttress assembly comprises four supporting walls, the four supporting walls surround to form a rectangular cavity, and the buttress assembly is connected to the supporting frame. The tunneling subsystem can be contained in the rectangular cavity and comprises a main supporting box body, a tunneling component and a tunneling tool bit component, the main supporting box body is connected to the lifting device through a hoisting steel cable, the tunneling component is movably connected to the main supporting box body, and the tunneling tool bit component is connected to the tunneling component. The rectangular-section slide-resistant pile shaft pit tunneling construction system can reduce the labor intensity of the existing manual excavation to the maximum extent, and improves the tunneling operation safety, so that the construction efficiency is greatly improved.

Description

Rectangular cross section friction pile pit excavation construction system

Technical Field

The invention relates to the technical field of foundation construction engineering equipment, in particular to a shaft pit tunneling construction system for an anti-slide pile with a rectangular cross section.

Background

The anti-slide pile is a concealed foundation construction for preventing landslide, is generally formed by digging a vertical pit in a deep well and pouring full reinforced concrete, and is mainly applied to the periphery of a dam body of a hydropower station, an entrance and an exit of a tunnel and the like near important facilities in a mountain area. According to different geological conditions of mountain rock and soil, the large-scale slide-resistant pile gradually adopts a rectangular section to achieve stronger bending resistance, the opening size can reach 3m multiplied by 5m, and the slide-resistant pile can move to 50m deep underground. The unique large-size rectangular section of the circular deep well tunneling device makes the existing circular deep well tunneling device difficult to be directly applied, but the section size of the circular deep well tunneling device is greatly different from the operation size of large construction devices such as an excavator, the depth of the circular deep well tunneling device is generally larger than 30m, and common excavation devices cannot be constructed. The whole construction is similar to the shield operation in the vertical direction, but the cross section of the existing shield machine is circular, and meanwhile, the shield equipment cannot solve the problem of vertical slag soil discharge, so that the shield equipment cannot be adopted. Therefore, the rectangular slide-resistant pile is still excavated in a manual mode at present, the construction difficulty is huge, the safety is poor, the manual participation is urgently needed to be reduced, the construction efficiency is improved, and the accident rate is reduced.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a rectangular-section slide-resistant pile shaft pit tunneling construction system, which can reduce the labor intensity of the existing manual excavation and improve the tunneling operation safety, thereby greatly improving the construction efficiency.

In order to achieve the above purpose, the present application provides the following technical solutions:

the application provides a rectangular cross section friction pile pit tunnelling construction system, includes:

the construction subsystem outside the foundation pit comprises a foundation pit concrete platform, a support frame and a hanger assembly, wherein the support frame is connected to the foundation pit concrete platform, the hanger assembly is movably connected to the support frame, and a hoisting device is arranged on the crane assembly;

the buttress component comprises four supporting walls, a rectangular cavity is formed by the surrounding of the four supporting walls, and the buttress component is connected to the supporting frame;

the tunneling subsystem can be contained in the rectangular cavity, the tunneling subsystem comprises a main supporting box body, a tunneling assembly and a tunneling tool bit assembly, the main supporting box body is connected with the lifting device through a hoisting steel cable, the tunneling assembly is movably connected with the main supporting box body, and the tunneling tool bit assembly is connected with the tunneling assembly.

Optionally, the tunneling subsystem includes a first direction moving assembly and a second direction moving assembly;

the first direction moving assembly comprises a first direction guide rail and a first direction moving assembly movably connected to the first direction guide rail;

the second direction moving assembly comprises a second direction guide rail and a second direction moving assembly movably connected to the second direction guide rail;

the first direction guide rail is connected to the main supporting box body, and the second direction guide rail is connected to the first direction moving assembly;

the tunneling assembly is connected to the second direction moving assembly.

Optionally, the tunneling assembly comprises a telescopic assembly, a pitching assembly and an azimuth assembly;

the azimuth motion assembly is rotatably connected to the second direction moving assembly, one end of the telescopic assembly is hinged with the azimuth motion assembly, and the other end of the telescopic assembly is connected with the tunneling cutter head assembly;

one end of the pitching motion assembly is hinged with the azimuth motion assembly, the other end of the pitching motion assembly is hinged with the telescopic assembly, and the pitching motion assembly performs telescopic motion to drive the telescopic assembly to perform pitching motion.

Optionally, the tunneling tool bit assembly comprises a tool set, a power unit and a rotary unit, the rotary unit is connected to the telescopic assembly, the power unit is connected to the rotary unit, and the power unit is in transmission connection with the tool set.

Optionally, the buttress assembly includes a knife frame and a plurality of groups of support frames, each group of support frames are sequentially detachably connected along a longitudinal direction, and the knife frame is connected to the support frame at the bottom end;

each group of the supporting frames comprises two first-direction buttresses and two second-direction buttresses;

the two first-direction supporting walls are arranged at intervals, the two second-direction supporting walls are respectively arranged on two sides of the first-direction supporting walls, and the second-direction supporting walls are respectively and vertically connected with the two first-direction supporting walls.

Optionally, a plurality of lateral hydraulic support assemblies are arranged on the main support box body, each lateral hydraulic support assembly is sequentially arranged along the circumferential direction of the main support box body, each lateral hydraulic support assembly has an extended state and a retracted state, and each lateral hydraulic support assembly abuts against the buttress assembly in the extended state.

Optionally, the rectangular cross-section slide-resistant pile shaft pit tunneling construction system further comprises a cooling and separating subsystem, wherein the cooling and separating subsystem comprises a cooling water pump station and a cooling water pipeline;

the cooling water pipeline extends to the tunneling subsystem.

Optionally, the system further comprises a slag discharging subsystem, wherein the slag discharging subsystem comprises a front-end slurry recovery pump station, a front-end recovery pipeline, a rear-end recovery pump station, a rear-end recovery pipeline, a main tank built-in pipeline and a slag soil recovery tank;

the muck recycling bin is arranged on the foundation pit concrete platform, the front-end mud recycling pump station is respectively connected with the front-end recycling pipeline and the built-in pipeline of the main box body, the front-end recycling pipeline extends to the tunneling assembly, the rear-end recycling pipeline is respectively connected with the built-in pipeline of the main box body and the front-end mud recycling pump station, and the rear-end recycling pump station is arranged on the front-end mud recycling pump station or the rear-end recycling pipeline.

Optionally, the residue soil recovery box is connected with a backwater separation device, and the backwater separation device is connected with the cooling water pump station.

Optionally, the rectangular-section slide-resistant pile shaft pit tunneling construction system further comprises a concrete filling subsystem, and the concrete filling subsystem is connected to the lifting device;

the concrete filling subsystem comprises a gliding water injection unit, a pipeline assembly and a concrete pumping assembly;

set up the filling hole on the buttress subassembly, gliding water injection unit and pipeline subassembly homoenergetic connect in the filling hole.

By adopting the technical scheme, the invention has the following beneficial effects:

the rectangular cross section friction pile pit tunneling construction system can reduce the labor intensity of the existing manual excavation to the maximum extent, and improves the tunneling operation safety, so that the construction efficiency is greatly improved.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention to its proper form. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 shows a general schematic diagram of a rectangular cross-section slide-resistant pile shaft excavation construction system of the present invention;

FIG. 2 is a schematic cross-sectional view illustrating the working state of the rectangular cross-section slide-resistant pile shaft excavation construction system;

FIG. 3 is a schematic bottom-axis view of the rectangular-section slide-resistant pile shaft excavation construction system in a working state;

FIG. 4 is a schematic bottom-axis view of the tunneling subsystem of the present invention;

FIG. 5 is a schematic bottom side view of the tunneling subsystem of the present invention;

FIG. 6 is a schematic view showing a first standard depth working condition of the foundation pit of the slide-resistant pile of the present invention;

fig. 7 shows a schematic view of the working state of the bottom of the foundation pit of the slide-resistant pile.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or assembly must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 7, an embodiment of the present application provides a rectangular cross-section slide pile shaft excavation construction system, including: the out-of-pit facility subsystem 3, the buttress component 2 and the tunneling subsystem 1. Facility subsystem 3 includes foundation ditch concrete platform 31, support frame 32 and gallows subassembly 33 outside the foundation ditch, support frame 32 connect in foundation ditch concrete platform 31, gallows subassembly 33 movably connect in support frame 32, set up hoisting apparatus on the crane subassembly 33. Buttress assembly 2 includes four support walls enclosing a rectangular cavity, and is attached to support frame 32. Tunnelling branch system 1 can hold in the rectangular cavity, tunnelling branch system 1 includes main supporting box 15, tunnelling subassembly and tunnelling tool bit subassembly 11, main supporting box 15 through hoist and mount steel cable connect in rise to rise the device, tunnelling subassembly movably connect in main supporting box 15, tunnelling tool bit subassembly 11 connect in the tunnelling subassembly.

The rectangular-section slide-resistant pile shaft pit tunneling construction system can reduce the labor intensity of the existing manual excavation to the maximum extent, and improves the tunneling operation safety, so that the construction efficiency is greatly improved.

Before the excavation construction of the anti-slide pile foundation pit, firstly constructing an external facility subsystem of the foundation pit: at the position of the foundation pit determined by surveying, an excavator and other equipment can be used for excavating a foundation shallow pit, the size of the cross section is larger than that of the cross section of the anti-slide pile, the depth is 1000mm, a reinforcement cage is braided at the edge of the foundation pit according to the outer edge size of a supporting buttress, such as 3600mm multiplied by 5600mm, a template is used for pouring concrete, and the foundation pit is used as a foundation pit concrete platform 31 after the concrete is solidified. Vertical support frames 32 are built at four corners of the foundation pit concrete platform 31, and translation cross beams are arranged at the tops of the support frames and can be used for installing and translating the movable hanger assemblies.

In a possible embodiment, the hanger assembly 33 further comprises moving means, external hoisting means and internal hoisting means. The external hoisting mechanism is used for hoisting the tunneling subsystem 1, lowering the tunneling subsystem to different depths of the foundation pit and hoisting the tunneling subsystem when tunneling is completed or a fault occurs. The inner hoisting mechanism is used for the concrete filling subsystem 7 to perform lifting operation. The moving mechanism is used for enabling the hoisting tunneling subsystem 1 and the hoisting concrete filling subsystem 7 to move in and out of the operation area in a translation mode, and fine adjustment of operation positions in a small range can be conducted. In the invention, the side with longer rectangular section length is taken as a first direction, the other direction is taken as a second direction, and the first direction is vertical to the second direction.

In one possible embodiment, the tunneling subsystem includes a first directional movement assembly 13 and a second directional movement assembly 14. The first direction moving assembly includes a first direction guide 131 and a first direction moving assembly 133 movably coupled to the first direction guide 131. The second direction moving assembly 14 includes a second direction rail 141 and a second direction moving assembly 143 movably coupled to the second direction rail. The first direction guide rail is connected to the main supporting box body, and the second direction guide rail is connected to the first direction moving assembly. The tunneling assembly is connected to the second direction moving assembly.

The main supporting box body 15 is a main structural support of the tunneling subsystem and provides installation space and mechanical support for subsystem equipment.

In one possible embodiment, the ripping assembly 12 includes a telescoping assembly 121, a pitching assembly 122, and an azimuth movement assembly 123. The direction moving assembly 123 is rotatably connected to the second direction moving assembly 143, one end of the telescopic assembly 121 is hinged with the direction moving assembly 123, and the other end is connected with the tunneling head assembly 11. One end of the pitching motion assembly 122 is hinged to the azimuth motion assembly, the other end of the pitching motion assembly is hinged to the telescopic assembly, and the pitching motion assembly performs telescopic motion to drive the telescopic assembly to perform pitching motion.

The tunneling subsystem can perform plane movement in a first direction and a second direction. The range of motion of the azimuth motion assembly 123 may be up to ± 180 °. The telescopic assembly 121 may be configured according to the size of a rectangular section, and generally has a movement stroke of 800mm or more. The pitching motion assembly can realize the motion range of 0-90 degrees and can adopt the form of a hydraulic push rod.

In one possible embodiment, the ripper bit assembly 11 is a rotary cutting tool assembly that includes a cutter block 111, a power unit 112, and a rotary unit 113, the rotary unit being coupled to the telescoping assembly, the power unit being coupled to the rotary unit, the power unit being in driving communication with the cutter block.

The cutter group 111 is composed of cutters for rock and soil cutting and is arranged in a circumferential whole circle. The power unit 112 is a circular motion unit which rotates in the same direction as the cutter set and provides cutting power for the movement of the cutter set. The rotary unit 113 is arranged at the front end of the power unit 112, the rotary angle can reach +/-180 degrees, and the cutter set 111 and the power unit 112 can be driven to perform rotary motion in the axial direction, so that rock and soil cutting is facilitated.

The upper part of the cutter head component 11 is provided with a cooling water releasing component, the lower part of the cutter head component is provided with a slurry recycling component, and the pipeline component mainly comprises a cooling water channel, a slurry loop, a follow-up drag chain component and the like. The cutter head assembly 11 is arranged at the tail end of the telescopic assembly 121, and can realize movements in three dimensions of telescopic feeding, pitching and azimuth.

Furthermore, the cutter head assembly 11 can completely cover the section required by excavation of the foundation pit of the slide-resistant pile with the rectangular section through the track planned by the control subsystem 6 under the combined motion of the tunneling assembly, the first direction moving assembly 13 and the second direction moving assembly 14, and can also cover the depth section required by tunneling.

In a possible embodiment, the buttress assembly includes a knife frame 21 and a plurality of sets of support frames, each set of support frames is detachably connected in sequence along the longitudinal direction, and the knife frame 21 is connected to the support frame at the bottom end. Each set of the braced frames includes two first direction buttresses 22 and two second direction buttresses 23. The two first direction supporting walls 22 are arranged at intervals, the two second direction supporting walls 23 are respectively arranged on two sides of the first direction supporting walls, and the second direction supporting walls are respectively and vertically connected with the two first direction supporting walls.

In this embodiment, the cross section of the knife frame 21 is wedge-shaped, is located at the bottom of the buttress assembly, and is made of high-strength carbon steel, the wedge-shaped knife edge is outward, the wedge angle is not more than 45 degrees, and the wedge-shaped knife edge, the 2 groups of first-direction buttresses 22 and the second-direction buttresses 23 form a frame-type structure and are fixed by bolts.

The lengths and thicknesses of the first direction buttress 22 and the second direction buttress 23 are determined according to factors such as the size of the foundation pit of the slide-resistant pile, the rock-soil conditions and the like, a reinforced concrete prefabrication mode is adopted, positioning clamping grooves 241 are reserved on the bottom surface and the top surface, mounting hole positions 242 are reserved on two sides, and concrete filling holes and gliding water injection holes 243 are reserved on the side surfaces.

The heights of the first direction buttress 22 and the second direction buttress 23 are fixed values, for example, the heights can be 1000mm, so that splicing and splicing in the depth direction are facilitated. The buttress component 2 is of a modular structure, can be infinitely spliced and is configured and combined according to the depth of a foundation pit.

Optionally, a plurality of lateral hydraulic support assemblies 16 are arranged on the main support box body 15, each lateral hydraulic support assembly 16 is sequentially arranged along the circumferential direction of the main support box body, and the lateral hydraulic support assemblies have an extended state and a retracted state, and in the extended state, each lateral hydraulic support assembly 16 abuts against the buttress assembly.

The lateral hydraulic support assemblies 16 are installed on two sides of the main support box body 15, and each two sets of the first direction support assembly 161 and the second direction support assembly 162 can extend to the periphery, and the tail end support legs can extend to the supporting wall assembly 2 and are pre-tightened in a hydraulic support mode to provide lateral support force. After the tail end support leg presses the side supporting wall, the supporting force sensor assembly feeds back a pressure value, and the pressing is stopped after a preset upper limit value is reached; also, the lateral hydraulic support assembly 16 is provided with a limiting assembly that limits its position as the end legs are retracted.

The buttress assemblies 2 can be spliced at the top after tunneling, water is injected at the lower sliding water injection holes through the lower sliding water injection units 71 after splicing, the friction force between the buttress and side rock soil is reduced, further, the lateral hydraulic support assemblies 16 are recovered, the spliced buttress slides down under the action of gravity, the sliding depth is generally about the module height of one buttress assembly 2, and the height can be defined as the standard tunneling depth in the system.

In a tunneling state, the buttress assembly 2 is hung on the vertical support frame 32 by a hoisting steel cable, so that the influence of the gliding of the cutter set 11 during the excavation work in the space outside the buttress on the tunneling operation is avoided. When the buttress slides down to the bottom of the foundation pit, the hoisting device 35 lowers the tunneling subsystem 1 by the height of one buttress assembly. After the tunneling subsystem 1 is lowered to a standard depth, the lateral hydraulic support component 16 extends out of the supporting and supporting walls in the first direction and the second direction until the supporting legs press the supporting and supporting walls to reach a set pre-tightening value. The excavation subsystem 1 can perform excavation at the next standard depth.

In a possible embodiment, the rectangular-section slide-resistant pile shaft excavation construction system further comprises a cooling and separating subsystem 4, wherein the cooling and separating subsystem 4 comprises a cooling water pump station 41, a water return separating device 42, a water supplementing valve 43 and a cooling water pipeline. The cooling water pipeline extends to the tunneling subsystem. The cooling water pump station 41 provides a supply of cooling water for the ripper blade assembly, and the cooling water line 44 is structurally proximate to the blade assembly and sprays a flow of cooling water while ripping.

The rectangular-section slide-resistant pile shaft excavation construction system can further comprise a slag discharging subsystem 5, wherein the slag discharging subsystem 5 comprises a front-end slurry recovery pump 51, a front-end recovery pipeline 52, a rear-end recovery pump station 53, a rear-end recovery pipeline 54, a main box built-in pipeline 55 and a slag soil recovery box 57. The muck recycling bin is arranged on the foundation pit concrete platform, the front-end mud recycling pump station is respectively connected with the front-end recycling pipeline and the built-in pipeline of the main box body, the front-end recycling pipeline extends to the tunneling assembly, the rear-end recycling pipeline is respectively connected with the built-in pipeline of the main box body and the front-end mud recycling pump station, and the rear-end recycling pump station is arranged on the front-end mud recycling pump station or the rear-end recycling pipeline.

The front end recovery pipeline 52 of the slag discharge subsystem 5 is close to the cooling water pipeline 44, can adopt a common structure design and is positioned at the rear part of the cutter set, so that the cutting residue soil slurry is convenient to recover.

The water filling amount of the cooling water can reach the position where the liquid level covers the tunneling cutter set, namely, the cutter set can completely work underwater.

The cooling water covers the bottom of the foundation pit, and in the process of cutting rock and soil by the tunneling cutter set 11, the rock and soil crushed slag cut at a high speed is mixed with water to form slurry, and at the moment, the front-end slurry recycling pump station 51 recycles the slurry of the rock and soil to the main box built-in pipeline 55 in the supporting main box 15 through the front-end recycling pipeline 52. The main tank built-in pipeline 55 is a temporary storage tank for muck and mud. Further, the rear recovery pump station 53 recovers the soil slurry in the main tank built-in pipe line 55 into the soil recovery tank 57 along the rear recovery pipe line 54.

In a possible embodiment, the muck recovery tank is connected with a return water separation device 42, and the return water separation device 42 is connected with the cooling water pump station 41.

In the muck recycling tank 57, the muck slurry can be subjected to centrifugal separation or sedimentation separation by the return water separation equipment 42, and after separation, cooling water can be pumped back to the cooling water pipeline 44 by the cooling water pump station 41 and then injected into the foundation pit in front end excavation to realize recycling. In the process that the tunneling subsystem 1 descends according to the tunneling standard depth, a rear-end recovery pipeline splicing joint 56 is installed at the foundation pit concrete platform 31, so that the length of the splicing joint coincides with the operation depth. Similarly, the chilled water lines 44 are also connected at the chilled water pumping stations 41. The splicing of the pipelines can also be replaced by a reserved coil pipe.

Rectangular cross section friction pile pit tunnelling construction system still wraps concrete filling branch system 7, concrete filling branch system 7 connect in rise to rise the device. The concrete filling subsystem comprises a gliding water injection unit 71, a pipeline assembly 72, a concrete pumping assembly and a personnel carrying platform. Set up the filling hole on propping up buttress subassembly 2, gliding water injection unit 71 and pipe assembly 72 homoenergetic connect in the filling hole.

When the excavation depth of the foundation pit reaches the design requirement of the slide-resistant pile, the pipeline assembly 72 in the concrete filling subsystem is aligned to the concrete filling hole 243 reserved in the buttress, and the concrete pump assembly 73 is used for filling concrete into the excavation gap between the prefabricated buttress and the foundation pit. The concrete gap is filled from bottom to top, the main supporting box body 15 is lifted upwards section by using the lifting device 35, filling is carried out on the side of the supporting wall on each standard depth, and the full depth in the foundation pit of the slide-resistant pile achieves the lateral strengthening supporting effect.

The rectangular-section slide-resistant pile shaft excavation construction system further comprises a control subsystem 6, and the control subsystem further comprises an excavation driving control component 61, a sensor component 62, a monitoring component 63, an alarm component 64 and an emergency stop warning component 65. The sensor assembly 62 is used for monitoring the stress state of the terminal equipment and the like, and part of the sensor assembly can be used as feedback to realize closed-loop control. The monitoring assembly 63 comprises a visible light camera, an infrared camera, ultrasonic imaging and other equipment, is used for monitoring personnel required by non-control feedback, and mainly realizes safe construction under remote monitoring in the tunneling process. The emergency stop warning assembly 65 includes emergency stop buttons, warning lights, operation status display lights and other devices at the accessible positions of the personnel, and is mainly used for safety construction.

The utility model provides a tunnelling tool bit subassembly 11 adopts convolution bucket type structure, fixes ground cutting tool on the excircle, realizes the cutting under the rotation state. The power unit 112 and the rotary unit 113 can adopt hydraulic motors as power to achieve a sufficient power-to-volume ratio. The telescopic assembly 121 adopts a hydraulically-driven telescopic structure, and has sufficient lateral rigidity to deal with lateral milling acting force. The pitching motion assembly 122 employs a double-side supported fixed hydraulic push telescopic arm as a driving part to achieve sufficient pitching cutting force and supporting force. The azimuth motion assembly 123 has a mechanical locking function, mainly realizes the rotation of the mechanical arm in operation, and can adopt a hydraulic motor as power. The first direction moving unit 13 and the second direction moving unit 14 may use ball linear guides as a kinematic pair, and hydraulic push rods as driving members of the first direction driving unit 132 and the second direction driving unit 142. The lateral hydraulic support component 16 can adopt the existing hydraulic support component, the support force sensor component 163 is installed at the tail end, and after the lateral hydraulic support compresses the supporting buttress, the support force sensor monitors the pressure value in real time to be used as support control feedback, so that the effective lateral support in the construction process is ensured. The buttress wedge-shaped tool frame 21 is formed by welding high-carbon steel, the size of the buttress wedge-shaped tool frame is matched with the rectangular section of the slide-resistant pile, and the wedge angle is not more than 45 degrees. The first direction supporting wall 22 and the second direction supporting wall 23 are formed in a reinforced concrete prefabricating mode, the appearance size and the installation fixing interface are determined according to the section size and the process of the slide-resistant pile, and installation holes, filling holes and the like are reserved during prefabricating. The foundation pit concrete platform 31 is provided with a fixed embedded part for installing the vertical support frame 32 after being built. The vertical support frame 32 is of a steel plate welding structure, and the bottom of the vertical support frame is fixed with an embedded part of the foundation pit concrete platform 31. The top of the vertical support frame 32 mounts a mobile hanger assembly support bar set for mounting a mobile hanger assembly 33. The mobile spreader assembly 33 mounts the usual drive equipment for the lifting equipment for raising and lowering the tunnelling sub-system 1 and the filling sub-system 7. Control subsystem 6 may employ the architecture and equipment of existing control systems.

The construction steps of the rectangular-section slide-resistant pile shaft pit tunneling construction system are provided as follows:

step S1, excavating a foundation shallow pit by using equipment such as an excavator and the like according to the site selection of the anti-slide pile foundation pit;

step S2, building a foundation pit concrete platform 31 on the shallow pit;

step S3, assembling a vertical support frame 32 and a movable hanger assembly 33 on the foundation pit concrete platform 31;

step S4, assembling a first group of buttress assemblies 2, including buttress bottom wedge-shaped knife frames 21, first direction buttresses 22 and second direction buttresses 23, placing the buttress assemblies into a shallow pit, and suspending the buttress assemblies by using hoisting cables through a vertical support frame 32;

step S5, the tunneling subsystem 1 is an integral module, is transported to the outer side of the vertical support frame 32 by a vehicle, is hoisted and unloaded by the movable hanger assembly 33, and is further moved into a foundation pit;

step S6, hoisting and lowering the tunneling subsystem 1 to the height of the first-stage buttress component 2, extending the lateral hydraulic support component 16 out to be supported on the buttress, and providing lateral support for tunneling of the tunneling subsystem 1;

step S7, installing a slag discharge subsystem 5;

step S8, mounting the concrete filling subsystem 7 on the movable hoisting component 33 on the vertical support frame 32 in the same way as the tunneling subsystem 1;

s9, connecting pipelines of the cooling separation subsystem 4 and the slag discharge subsystem 5;

step S10, starting the system and self-checking;

step S11, excavating according to the set excavation track;

step S12, after digging a standard depth, resetting the tunneling subsystem 1;

step S13, assembling buttresses in the first direction and the second direction in the second-stage buttressing wall assembly 2, that is, a standard buttressing wall module, and installing the standard buttressing wall module to the upper stop position of the first-stage buttressing wall assembly 2 (that is, a support frame);

step S14, water is injected into the water injection holes reserved in the buttress by using the buttress downward-sliding water injection unit 71, and after resistance reduction, the buttress assembly 2 falls under the action of gravity and the bottom wedge-shaped knife frame 21;

step S15, controlling a suspension cable for suspending the buttress assembly 2, so that the buttress assembly 2 is stopped at a standard depth of 1000mm in the patent when falling to a standard depth;

step S16, repeating the steps 11 to 15;

step S17, during which, the muck carrier vehicle is used for cleaning the muck in the muck recycling box 57;

step S18, when the excavation depth of the pit reaches a design value, pumping concrete into a concrete injection hole reserved by the buttress component 2 at the bottommost layer by using a concrete pumping component 73 to fill the gap between the buttress and the inner side of the pit for excavating rock soil so as to perform anti-skid reinforcement;

step S19, the concrete filling subsystem 7 has a personnel operation space, and part of the construction process can be operated manually;

step S20, lifting the concrete filling subsystem 7 upwards step by step according to the method in the step 17, so that gaps between the buttress with each level of standard depth and the inner side of the excavation surface of the foundation pit are filled;

step S21, withdrawing the tunneling subsystem 1 and finishing foundation pit tunneling;

step S22, operating the pit of the concrete filling subsystem 7 by constructors, binding reinforcing steel bars from bottom to top, and continuously pouring the anti-slide pile body by using the concrete filling subsystem 7 until the pile body is formed;

and S23, withdrawing the concrete filling subsystem 7, and dismantling the vertical support frame 32 and other equipment to complete the construction of the slide-resistant pile.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. The utility model provides a rectangular cross section friction pile pit tunnelling construction system which characterized in that includes:

the construction subsystem outside the foundation pit comprises a foundation pit concrete platform, a support frame and a hanger assembly, wherein the support frame is connected to the foundation pit concrete platform, the hanger assembly is movably connected to the support frame, and a hoisting device is arranged on the crane assembly;

the buttress component comprises four supporting walls, a rectangular cavity is formed by the surrounding of the four supporting walls, and the buttress component is connected to the supporting frame;

the tunneling subsystem can be contained in the rectangular cavity, the tunneling subsystem comprises a main support box body, a tunneling component and a tunneling tool bit component, the main support box body is connected with the lifting device through a hoisting steel cable, the tunneling component is movably connected with the main support box body, and the tunneling tool bit component is connected with the tunneling component.

2. The rectangular cross-section slide pile shaft excavation construction system of claim 1, wherein the excavation subsystem includes a first directional movement assembly and a second directional movement assembly;

the first direction moving assembly comprises a first direction guide rail and a first direction moving assembly movably connected to the first direction guide rail;

the second direction moving assembly comprises a second direction guide rail and a second direction moving assembly movably connected to the second direction guide rail;

the first direction guide rail is connected to the main supporting box body, and the second direction guide rail is connected to the first direction moving assembly;

the tunneling assembly is connected to the second direction moving assembly.

3. The rectangular cross-section slide pile pit driving construction system of claim 1, wherein the driving assembly includes a telescoping assembly, a pitching motion assembly and an azimuth motion assembly;

the azimuth motion assembly is rotatably connected to the second direction moving assembly, one end of the telescopic assembly is hinged with the azimuth motion assembly, and the other end of the telescopic assembly is connected with the tunneling cutter head assembly;

one end of the pitching motion assembly is hinged with the azimuth motion assembly, the other end of the pitching motion assembly is hinged with the telescopic assembly, and the pitching motion assembly performs telescopic motion to drive the telescopic assembly to perform pitching motion.

4. The rectangular cross-section slide-resistant pile pit driving construction system according to claim 1, wherein the driving cutter head assembly comprises a cutter set, a power unit and a rotary unit, the rotary unit is connected to the telescopic assembly, the power unit is connected to the rotary unit, and the power unit is in transmission connection with the cutter set.

5. The rectangular-section slide-resistant pile pit driving construction system according to claim 1, wherein the buttress assembly comprises a knife frame and a plurality of groups of support frames, the support frames are sequentially and detachably connected in the longitudinal direction, and the knife frame is connected to the support frame at the bottom end;

each group of the supporting frames comprises two first-direction buttresses and two second-direction buttresses;

the two first-direction supporting walls are arranged at intervals, the two second-direction supporting walls are respectively arranged on two sides of the first-direction supporting walls, and the second-direction supporting walls are respectively and vertically connected with the two first-direction supporting walls.

6. The rectangular cross-section slide-resistant pile pit driving construction system according to claim 1, wherein a plurality of lateral hydraulic support assemblies are provided on a main support box body, each of the lateral hydraulic support assemblies being sequentially provided in a circumferential direction of the main support box body, the lateral hydraulic support assemblies having an extended state in which each of the lateral hydraulic support assemblies abuts against the buttress assembly and a retracted state.

7. The rectangular cross-section slide-resistant pile shaft excavation construction system according to claim 1, further comprising a cooling and separating subsystem, wherein the cooling and separating subsystem comprises a cooling water pump station and a cooling water pipeline;

the cooling water pipeline extends to the tunneling subsystem.

8. The rectangular cross-section slide-resistant pile pit driving construction system according to claim 1, further comprising a slag discharging subsystem, wherein the slag discharging subsystem comprises a front-end mud recovery pump station, a front-end recovery pipeline, a rear-end recovery pump station, a rear-end recovery pipeline, a main tank built-in pipeline and a slag soil recovery tank;

the muck recycling bin is arranged on the foundation pit concrete platform, the front-end mud recycling pump station is respectively connected with the front-end recycling pipeline and the built-in pipeline of the main box body, the front-end recycling pipeline extends to the tunneling assembly, the rear-end recycling pipeline is respectively connected with the built-in pipeline of the main box body and the front-end mud recycling pump station, and the rear-end recycling pump station is arranged on the front-end mud recycling pump station or the rear-end recycling pipeline.

9. The rectangular-section slide-resistant pile shaft excavation construction system according to claim 1,

the residue soil recovery box is connected with a backwater separation device, and the backwater separation device is connected with the cooling water pump station.

10. The rectangular cross-section slide-resistant pile shaft excavation construction system according to claim 1, characterized by further comprising a concrete filling subsystem, wherein the concrete filling subsystem is connected to the hoisting device;

the concrete filling subsystem comprises a gliding water injection unit, a pipeline assembly and a concrete pumping assembly;

set up the filling hole on the buttress subassembly, gliding water injection unit and pipeline subassembly homoenergetic connect in the filling hole.

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