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

A construction system for vertical pit excavation of rectangular cross-section anti-sliding piles

technical field

The invention relates to the technical field of infrastructure engineering equipment, in particular to a vertical pit excavation construction system for rectangular cross-section anti-sliding piles.

Background technique

Anti-slide piles are a kind of concealed infrastructure project to prevent landslides. Generally, deep wells are used to excavate vertical pits and then filled with fully reinforced concrete. According to the different geological conditions of the rock and soil of the mountain, the large-scale anti-sliding piles gradually adopt rectangular sections to achieve stronger bending resistance. Its unique large-size rectangular section makes it difficult to directly apply the existing circular deep well excavation equipment, but its section size is much different from that of large construction equipment such as excavators, and its depth is generally greater than 30m. The excavation equipment cannot be constructed. The overall construction is similar to the vertical shield operation, but the existing shield machines are all circular in section, and the shield equipment cannot solve the vertical muck discharge, so it cannot be used. Therefore, at present, the rectangular anti-sliding piles are still excavated manually, which is difficult to construct and has poor safety. It is urgent to reduce the degree of manual participation, improve the construction efficiency and reduce the accident rate.

In view of this, the present invention is proposed.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a construction system for vertical pit excavation of rectangular cross-section anti-sliding piles, which can reduce the labor intensity of the existing manual excavation, improve the safety of the excavation operation, and thus greatly improve the construction efficiency.

To achieve the above-mentioned purpose of the invention, the application provides the following technical solutions:

The application provides a construction system for vertical pit excavation of rectangular cross-section anti-sliding piles, including:

A sub-system outside the foundation pit, the sub-system outside the foundation pit includes a foundation pit concrete platform, a support frame and a hanger assembly, the support frame is connected to the foundation pit concrete platform, and the hanger assembly is movably connected A hoisting device is arranged on the support frame and the crane assembly;

a support wall assembly, the support wall assembly includes four support walls, the four support walls enclose a rectangular cavity, and the support wall assembly is connected to the support frame;

A sub-system for excavation, which can be accommodated in the rectangular cavity, and the sub-system for excavation includes a main support box, an excavation assembly and an excavation tool head assembly, and the main support box is connected to the main support box through a hoisting steel cable. The lifting device, the excavation assembly are movably connected to the main support box, and the excavation bit assembly is connected to the excavation assembly.

Optionally, the excavation subsystem includes a first-direction moving component and a second-direction moving component;

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

The second direction moving assembly includes 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 support box, and the second direction guide rail is connected to the first direction moving assembly;

The excavation assembly is connected to the second direction moving assembly.

Optionally, the excavation assembly includes a telescopic assembly, a pitching motion assembly and an azimuth motion assembly;

the azimuth movement component is rotatably connected to the second direction movement component, one end of the telescopic component is hinged with the azimuth movement component, and the other end is connected to the excavation tool head component;

One end of the pitching motion assembly is hinged with the azimuth motion assembly, and the other end is hinged with the telescopic assembly, and the pitching motion assembly telescopically moves to drive the telescopic assembly for pitching motion.

Optionally, the excavation cutter head assembly includes a cutter group, 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, the power unit and the cutter Group drive connection.

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

Each group of the support frames includes two first-direction support walls and two second-direction support walls;

The two first-direction supporting walls are arranged at intervals, the two second-direction supporting walls are respectively arranged on both sides of the first-direction supporting walls, and the second-direction supporting walls are respectively vertically connected Two said first direction support walls.

Optionally, the main support box is provided with a plurality of lateral hydraulic support assemblies, each of the lateral hydraulic support assemblies is arranged in sequence along the circumferential direction of the main support box, and the lateral hydraulic support assemblies have protruding state and retracted state, in the extended state, each of the lateral hydraulic support assemblies abuts against the support wall assembly.

Optionally, the construction system for the vertical pit excavation of the rectangular cross-section anti-sliding pile further includes a cooling and separation sub-system, and the cooling and separation sub-system includes a cooling water pump station and a cooling water pipeline;

The cooling water line extends to the excavation sub-system.

Optionally, it also includes a slag discharge sub-system, and the slag discharge sub-system includes a front-end mud recovery pump station, a front-end recovery pipeline, a back-end recovery pump station, a back-end recovery pipeline, a built-in pipeline in the main box, and a muck soil. recycle bin;

The slag recovery box is arranged on the concrete platform of the foundation pit, the front-end mud recovery pump station is respectively connected to the front-end recovery pipeline and the pipeline built in the main box, and the front-end recovery pipeline extends to the excavation The rear-end recovery pipeline is respectively connected to the main box built-in pipeline and the front-end mud recovery pump station, and the rear-end recovery pump station is arranged on the front-end mud recovery pump station or the rear-end recovery pipeline.

Optionally, the slag recovery box is connected to a backwater separation device, and the backwater separation device is connected to the cooling water pump station.

Optionally, the construction system for vertical pit excavation of rectangular cross-section anti-sliding piles further includes a concrete filling sub-system, and the concrete filling sub-system is connected to the lifting device;

The concrete filling sub-system includes a sliding water injection unit, a pipeline assembly, and a concrete pumping assembly;

An injection hole is provided on the supporting wall assembly, and both the sliding water injection unit and the pipeline assembly can be connected to the injection hole.

By adopting the above-mentioned technical scheme, the present invention has the following beneficial effects:

The rectangular section anti-sliding pile vertical pit excavation construction system of the present application can minimize the labor intensity of the existing manual excavation, improve the safety of the excavation operation, and thus greatly improve the construction efficiency.

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Description of drawings

The accompanying drawings are used as a part of the present application to provide a further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings in the following description are only some embodiments, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort. In the attached image:

Fig. 1 shows the general schematic diagram of the construction system for vertical pit excavation of rectangular cross-section anti-sliding piles according to the present invention;

Fig. 2 shows the cross-sectional schematic diagram of the working state of the construction system of the vertical pit excavation construction system of the rectangular cross-section anti-sliding pile of the present invention;

Fig. 3 shows the bottom axis side schematic diagram of the working state of the vertical pit excavation construction system of the rectangular cross-section anti-sliding pile of the present invention;

Fig. 4 shows the bottom shaft side schematic diagram of the tunneling subsystem of the present invention;

Figure 5 shows a schematic bottom side view of the tunneling subsystem of the present invention;

Fig. 6 shows the schematic diagram of the first standard depth working state of the anti-sliding pile foundation pit of the present invention;

FIG. 7 is a schematic diagram showing the working state of the bottom of the anti-sliding pile foundation pit of the present invention.

It should be noted that these drawings and written descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments.

Detailed ways

In order to make the purposes, 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 to illustrate the present invention , but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the orientations or positional relationships shown in the accompanying drawings, only for the purpose of It is for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated connection. Ground connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Referring to FIGS. 1 to 7 , the embodiment of the present application provides a construction system for vertical pit excavation of rectangular cross-section anti-sliding piles, including: a sub-system 3 for facilities outside the foundation pit, a supporting wall assembly 2 and a sub-system 1 for excavation. The external facilities subsystem 3 of the foundation pit includes a foundation pit concrete platform 31, a support frame 32 and a hanger assembly 33, the support frame 32 is connected to the foundation pit concrete platform 31, and the hanger frame assembly 33 is movably connected to the foundation pit concrete platform 31. The support frame 32 and the hoisting device are arranged on the crane assembly 33 . The support wall assembly 2 includes four support walls, and the four support walls enclose a rectangular cavity, and the support wall assembly is connected to the support frame 32 . The excavation sub-system 1 can be accommodated in the rectangular cavity, and the excavation sub-system 1 includes a main support box 15, an excavation assembly and an excavation cutter head assembly 11, and the main support box 15 is connected to all the For the lifting device, the excavation assembly is movably connected to the main support box 15, and the excavation bit assembly 11 is connected to the excavation assembly.

The rectangular section anti-sliding pile vertical pit excavation construction system of the present application can minimize the labor intensity of the existing manual excavation, improve the safety of the excavation operation, and thus greatly improve the construction efficiency.

Before the excavation and construction of the anti-sliding pile foundation pit, first build the sub-system outside the foundation pit: at the location of the foundation pit determined by the survey, excavators and other equipment can be used to excavate the foundation shallow pit, the section size is larger than the anti-sliding pile section, the depth 1000mm, at the edge of the foundation pit according to the size of the outer edge of the support wall, such as 3600mm × 5600mm, weave a steel cage and use a formwork to pour concrete, which will be used as a foundation pit concrete platform 31 after solidification. The four corners of the foundation pit concrete platform 31 are erected with a built-up support frame 32, the top of which is provided with a translation beam, which can be used for installation and translation of the movable hanger assembly.

In a possible embodiment, the hanger assembly 33 further includes a moving mechanism, an outer hoisting mechanism and an inner hoisting mechanism. The external hoisting mechanism is used to hoist the excavation sub-system 1, lower it to different depths of the foundation pit, and lift it when the excavation is completed or when it fails. The inner hoisting mechanism is used for lifting and lowering of the concrete filling sub-system 7 . The moving mechanism is used to translate the hoisting and excavation sub-system 1 and the hoisting concrete filling sub-system 7 into and out of the work area, and can perform small-scale fine-tuning of the work position. In the present invention, the longer side of the rectangular cross-section is taken as the first direction, the other direction is taken as the second direction, and the first direction and the second direction are perpendicular to each other.

In a possible embodiment, the excavation subsystem includes a first-direction moving assembly 13 and a second-direction moving assembly 14 . The first direction moving assembly includes a first direction guide rail 131 and a first direction moving assembly 133 movably connected to the first direction guide rail 131 . The second direction moving assembly 14 includes a second direction guide rail 141 and a second direction moving assembly 143 movably connected to the second direction guide rail. The first direction guide rail is connected to the main support box, and the second direction guide rail is connected to the first direction moving assembly. The excavation assembly is connected to the second direction moving assembly.

The main support box 15 is the main structural support of the tunneling sub-system, and provides installation space and mechanical support for the sub-system equipment.

In a possible embodiment, the excavation assembly 12 includes a telescopic assembly 121 , a pitching motion assembly 122 and an azimuth motion assembly 123 . The azimuth movement component 123 is rotatably connected to the second direction movement component 143 , one end of the telescopic component 121 is hinged with the azimuth movement component 123 , and the other end is connected to the excavation cutter head component 11 . One end of the pitching motion assembly 122 is hinged with the azimuth motion assembly, and the other end is hinged with the telescopic assembly. The pitching motion assembly telescopically moves to drive the telescopic assembly to pitch motion.

The excavation subsystem can perform plane movement in two directions: the first direction and the second direction. The range of motion of the azimuth motion component 123 can reach ±180°. The telescopic assembly 121 can be configured according to the size of the rectangular section, and generally has a movement stroke of more than 800 mm. The pitching motion component can achieve a range of motion from 0° to 90°, and can be in the form of a hydraulic push rod.

In a possible embodiment, the excavation tool head assembly 11 is a rotary cutting tool assembly, including a cutter group 111, a power unit 112 and a rotary unit 113, the rotary unit is connected to the telescopic assembly, and the power The unit is connected to the rotary unit, and the power unit and the cutter group are connected in a driving manner.

The cutter group 111 is composed of cutting tools for rock and soil, and is arranged in a full circle around the circumference. The power unit 112 is a circular motion unit with the same rotation direction as the cutter group, and provides cutting power for the movement of the cutter group. The rotating unit 113 is installed at the front end of the power unit 112, and the rotating angle can reach ±180°, which can drive the cutter group 111 and the power unit 112 to rotate in the axial direction, which is convenient for rock and soil cutting.

The upper part of the cutter head assembly 11 is installed with a cooling water release assembly, and the lower part is installed with a mud recovery assembly. The pipeline assembly is mainly divided into a cooling water circuit, a mud circuit, and a follow-up drag chain assembly. The cutter head assembly 11 is installed at the end of the telescopic assembly 121, and can realize three-dimensional movements of telescopic feed, pitch and azimuth.

Furthermore, the cutter head assembly 11 can completely cover the cross-section required for excavation of the rectangular-section anti-sliding pile foundation pit through the trajectory planned by the control subsystem 6 under the joint movement of the excavation assembly, the first-direction moving assembly 13 and the second-direction moving assembly 14 At the same time, it can also cover the depth-to-section required for the excavation.

In a possible implementation, the support wall assembly includes a knife frame 21 and a plurality of groups of support frames, each group of the 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 superior. Each group of the support frames includes two first-direction support walls 22 and two second-direction support walls 23 . The two first-direction supporting walls 22 are arranged at intervals, the two second-direction supporting walls 23 are respectively arranged on both sides of the first-direction supporting walls, and the second-direction supporting walls are respectively The two support walls in the first direction are vertically connected.

In this embodiment, the cross section of the knife frame 21 is wedge-shaped, located at the bottom of the support wall assembly, made of high-strength carbon steel, the wedge-shaped knife edge is outward, and the wedge-shaped angle does not exceed 45°, and the two groups of first direction support The buttresses 22 and the second-direction buttresses 23 form a frame structure and are fixed by bolts.

The length and thickness of the support wall 22 in the first direction and the support wall 23 in the second direction are determined according to factors such as the size of the anti-sliding pile foundation pit, geotechnical conditions, etc. For the card slot 241, installation holes 242 are reserved on both sides, and concrete filling holes and sliding water injection holes 243 are reserved on the side.

The heights of the supporting walls 22 in the first direction and the supporting walls 23 in the second direction are fixed values, such as 1000 mm, which is convenient for splicing and continuation in the depth direction. The supporting wall assembly 2 is a modular structure, which can be continuously connected indefinitely, and can be configured and combined according to the depth of the foundation pit.

Optionally, the main support box 15 is provided with a plurality of lateral hydraulic support assemblies 16, and each of the lateral hydraulic support assemblies 16 is arranged in sequence along the circumferential direction of the main support box. It has an extended state and a retracted state. In the extended state, each of the lateral hydraulic support assemblies 16 abuts against the support wall assembly.

The lateral hydraulic support assemblies 16 are installed on both sides of the main support box 15, and include two sets of first direction support assemblies 161 and second direction support assemblies 162, which can be extended around, and the end legs can be extended to the support wall On component 2, hydraulic support is used to preload to provide lateral support force. After the end foot presses the side support buttress, the support force sensor assembly feeds back the pressure value, and stops pressing after reaching the preset upper limit; at the same time, the lateral hydraulic support assembly 16 is provided with a limit component, which is limited when the end foot is retracted its location.

The support wall assembly 2 can be connected at the top after the excavation. After the connection, the slide water injection unit 71 performs water injection at the slide water injection hole to reduce the friction between the support wall and the side rock and soil, and further, the lateral hydraulic support The assembly 16 is recovered, and the connected support wall slides down under the action of gravity, and the sliding depth is generally about the module height of one support wall assembly 2, which can be defined as the standard excavation depth in the system.

In the excavation state, the support wall assembly 2 is suspended on the vertical support frame 32 by a hoisting wire cable, so as to prevent the cutter group 11 from sliding down and affecting the excavation operation when the cutter group 11 performs excavation work in the space outside the support wall. When the supporting wall slides down to the bottom of the foundation pit, the lifting device 35 lowers the excavation subsystem 1 down to the height of one supporting wall assembly. After the tunneling sub-system 1 is lowered to a standard depth, the lateral hydraulic support assembly 16 extends toward the support walls in the first direction and the second direction until the feet press against the support walls to reach the set preload value. The excavation subsystem 1 can carry out excavation of the next standard depth.

In a possible embodiment, the rectangular-section anti-sliding pile vertical pit excavation construction system further includes a cooling and separation sub-system 4, and the cooling and separation sub-system 4 includes a cooling water pump station 41, a return water separation device 42, a water supply valve 43 and Cooling water line. The cooling water line extends to the excavation sub-system. The cooling water pump station 41 provides the supply of cooling water for the excavating cutter group, and the cooling water pipeline 44 is structurally close to the position of the cutter group, and sprays the cooling water flow during the excavation.

The rectangular section anti-sliding pile vertical pit tunneling construction system may also include a slag discharge sub-system 5, and the slag discharge sub-system 5 includes a front-end mud recovery pump 51, a front-end recovery pipeline 52, a rear-end recovery pump station 53, and a rear-end recovery pump. The pipeline 54 , the built-in pipeline 55 in the main box, and the muck recovery tank 57 . The slag recovery box is arranged on the concrete platform of the foundation pit, the front-end mud recovery pump station is respectively connected to the front-end recovery pipeline and the pipeline built in the main box, and the front-end recovery pipeline extends to the excavation The rear-end recovery pipeline is respectively connected to the main box built-in pipeline and the front-end mud recovery pump station, and the rear-end recovery pump station is arranged on the front-end mud recovery pump station or the rear-end recovery pipeline.

The front-end recovery pipeline 52 of the slag discharge sub-system 5 is located close to the cooling water pipeline 44, and can adopt a common structure design, both located at the rear of the cutter group, which is convenient for the recovery of cutting slag mud.

The filling amount of cooling water can reach the position where the liquid level covers the excavation cutter group, that is, the cutter group can work completely underwater.

The cooling water covers the bottom of the foundation pit. During the process of cutting the rock and soil by the excavating cutter group 11, the rock and soil debris cut at high speed is mixed with water to form mud. The passage 52 is recovered into the main case built-in piping 55 in the support main case 15 . The built-in pipeline 55 of the main box is a temporary storage box for the slag mud. Further, the rear-end recovery pump station 53 recovers the slag mud in the main tank built-in pipeline 55 into the slag recovery tank 57 along the rear-end recovery pipeline 54 .

In a possible embodiment, the slag recovery tank is connected to a backwater separation device 42 , and the backwater separation device 42 is connected to the cooling water pump station 41 .

In the slag recovery box 57, the slag mud can be centrifugally separated or precipitation-separated by the return water separation device 42. After separation, the cooling water can be pumped back to the cooling water pipeline 44 by the cooling water pump station 41, and then injected into the front-end excavation. In the foundation pit, the recycling is realized. During the process of descending the tunneling subsystem 1 according to the tunneling standard depth, the rear-end recovery pipeline splicing joint 56 is installed at the foundation pit concrete platform 31 so that its length is consistent with the working depth. Similarly, the cooling water pipeline 44 is also connected at the cooling water pump station 41 . The continuation of the above pipelines can also be replaced by the form of reserved coils.

The rectangular section anti-sliding pile vertical pit excavation construction system also includes a concrete filling sub-system 7, and the concrete filling sub-system 7 is connected to the lifting device. The concrete filling sub-system includes a sliding water injection unit 71 , a pipeline assembly 72 , a concrete pumping assembly, and a passenger platform. The supporting wall assembly 2 is provided with an injection hole, and both the sliding water injection unit 71 and the pipeline assembly 72 can be connected to the injection hole.

When the excavation depth of the foundation pit meets the design requirements of the anti-sliding pile, align the pipe assembly 72 in the concrete filling sub-system with the concrete filling hole 243 reserved for the support wall, and use the concrete pump assembly 73 to fill the concrete into the prefabricated support wall. In the excavation gap between the foundation pit. The concrete void is filled in a bottom-up manner. The main support box 15 is lifted up section by section using the lifting device 35, and the filling is carried out on the side of the supporting wall at each standard depth. The full depth in the anti-sliding pile foundation pit reaches Lateral strengthening support.

The rectangular section anti-sliding pile vertical pit excavation construction system also includes a control sub-system 6 , and the control sub-system also includes an excavation drive control assembly 61 , a sensor assembly 62 , a monitoring assembly 63 , an alarm assembly 64 , and an emergency stop warning assembly 65 . The sensor assembly 62 is used to monitor the force state of the terminal equipment, etc., and part of it can be used as feedback to realize closed-loop control. The monitoring component 63 includes devices such as visible light cameras, infrared cameras, and ultrasonic imaging, which are used for personnel monitoring required for non-control feedback, and mainly realize safe construction under remote monitoring during the excavation process. The emergency stop warning component 65 includes equipment such as emergency stop buttons, warning lights, and operation status display lights at the accessible positions of personnel, and is mainly used for safe construction.

The excavation cutter head assembly 11 of the present application adopts a revolving barrel structure, and a geotechnical cutting tool is fixed on the outer circle to realize cutting in a rotating state. The power unit 112 and the slewing unit 113 can be powered by hydraulic motors to achieve a sufficient power-to-volume ratio. The telescopic assembly 121 adopts a hydraulically propelled telescopic structure and has sufficient lateral rigidity to cope with the force of lateral milling. The pitching motion assembly 122 adopts a hydraulically propelled telescopic arm fixed on both sides as a driving component, so as to achieve sufficient pitching cutting force and supporting force. The azimuth movement component 123 has a mechanical locking function, mainly realizes the rotation of the mechanical arm during operation, and can use a hydraulic motor as a power. The first-direction moving component 13 and the second-direction moving component 14 can use ball linear guide rails as the motion pair, and hydraulic push rods as the driving components of the first-direction driving component 132 and the second-direction driving component 142 . The lateral hydraulic support assembly 16 can use the existing hydraulic support assembly, and the support force sensor assembly 163 is installed at the end. After the lateral hydraulic support presses the buttress, the pressure value is monitored in real time by the support force sensor as a support control feedback to ensure the construction process. Effective lateral support in . The wedge-shaped knife frame 21 of the buttress is welded and formed by high carbon steel, the size matches the rectangular section of the anti-sliding pile, and the wedge angle does not exceed 45°. The supporting wall 22 in the first direction and the supporting wall 23 in the second direction are formed by reinforced concrete prefabrication. The external dimensions and installation and fixing interfaces are determined according to the cross-sectional size and process of the anti-sliding pile. The installation holes and filling holes are reserved during prefabrication. . After the foundation pit concrete platform 31 is built, the installation and fixing embedded parts of the vertical support frame 32 are reserved. The vertical support frame 32 adopts a steel plate welded structure, and the bottom is fixed with the embedded parts of the foundation pit concrete platform 31 . The top of the vertical support frame 32 is installed with a support rod group of the movable hanger assembly for installing the movable hanger assembly 33 . The movable hanger assembly 33 mounts the usual driving equipment for lifting equipment for raising and lowering the tunneling sub-system 1 and the filling sub-system 7 . The control subsystem 6 can adopt the structure and equipment of the existing control system.

The following provides the construction steps of the construction system for the vertical pit excavation of the rectangular cross-section anti-sliding pile of the present application:

Step S1, according to the site selection of the anti-sliding pile foundation pit, first use equipment such as excavators to excavate the foundation shallow pit;

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

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

Step S4, assembling the first group of supporting wall components 2, including the wedge-shaped knife frame 21 at the bottom of the supporting wall, the supporting wall 22 in the first direction, and the supporting wall 23 in the second direction, put into the shallow pit, and supported by vertical The frame 32 is suspended by a hoisting steel cable;

Step S5, the tunneling sub-system 1 is an integral module, which is transported to the outside of the vertical support frame 32 by a vehicle, and the movable hanger assembly 33 is used to lift the unloading truck, and then move it into the foundation pit;

Step S6, hoisting and lowering the tunneling sub-system 1 to the height of the first-level support wall assembly 2, extending the lateral hydraulic support assembly 16, and supporting it on the supporting wall to provide lateral support for the tunneling sub-system 1 to excavate;

Step S7, install the slag discharge sub-system 5;

Step S8, the concrete filling sub-system 7 is installed on the movable hoisting assembly 33 on the vertical support frame 32, and the installation method is the same as that of the excavation sub-system 1;

Step S9, connecting each pipeline of the cooling and separation sub-system 4 and the slag discharge sub-system 5;

Step S10, the system starts, and self-checks;

Step S11, excavating according to the set driving track;

Step S12, after excavating a standard depth, reset the excavation subsystem 1;

Step S13, assemble the first- and second-direction buttresses in the second-level buttressing wall assembly 2, that is, the supporting wall standard module, and install them to the upper end of the first-level buttressing wall assembly 2 (that is, the supporting frame). mouth position;

Step S14, using the supporting wall sliding water injection unit 71 to inject water into the water injection holes reserved for the supporting wall, after drag reduction, the supporting wall assembly 2 falls under the action of gravity and the bottom wedge-shaped knife frame 21;

Step S15, controlling the suspending cable for suspending the buttress wall assembly 2, so that the buttress wall assembly 2 falls at a standard depth and stops at a standard depth of 1000 mm in this patent;

Step S16, repeat steps 11 to 15;

During step S17, use a muck transporter to clean up the muck in the muck recovery box 57;

Step S18, when the excavation depth of the deep pit reaches the design value, use the concrete pumping assembly 73 to pump concrete into the concrete injection hole reserved for the support wall assembly 2 at the bottom layer to fill the space between the support wall and the inside of the pit where the rock and soil are excavated. gaps between for anti-slip reinforcement;

Step S19, the concrete filling sub-system 7 has space for personnel to operate, and part of the construction process can be operated manually;

Step S20, according to the method of step 17, the concrete filling sub-system 7 is lifted up step by step, so that the supporting wall of each level of standard depth and the gap inside the excavation surface of the foundation pit are filled;

Step S21, withdrawing the excavation subsystem 1, and the excavation of the foundation pit is completed;

Step S22, the construction personnel operate the concrete filling sub-system 7 to go down the pit, tie the steel bars from the bottom up, and continue to use the concrete filling sub-system 7 to pour the anti-sliding pile body until the pile body is formed;

Step S23, withdrawing the concrete filling sub-system 7, removing equipment such as the vertical support frame 32, and completing the construction of the anti-sliding pile.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Within the scope of the technical solution of the present invention, personnel can make some changes or modifications to equivalent examples of equivalent changes by using the above-mentioned technical content, but any content that does not depart from the technical solution of the present invention, according to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments in the technical essence still fall within the scope of the solution of the present invention.

Claims (10)

1. a rectangular section anti-sliding pile vertical pit excavation construction system, is characterized in that, comprises: A sub-system outside the foundation pit, the sub-system outside the foundation pit includes a foundation pit concrete platform, a support frame and a hanger assembly, the support frame is connected to the foundation pit concrete platform, and the hanger assembly is movably connected A hoisting device is arranged on the support frame and the crane assembly; a support wall assembly, the support wall assembly includes four support walls, the four support walls enclose a rectangular cavity, and the support wall assembly is connected to the support frame; A sub-system for excavation, which can be accommodated in the rectangular cavity, and the sub-system for excavation includes a main support box, an excavation assembly and an excavation tool head assembly, and the main support box is connected to the main support box through a hoisting steel cable. The lifting device, the excavation assembly are movably connected to the main support box, and the excavation bit assembly is connected to the excavation assembly. 2. The rectangular section anti-sliding pile vertical pit excavation construction system according to claim 1, wherein the excavation sub-system comprises a first-direction moving component and a second-direction moving component; The first direction moving assembly includes a first direction guide rail and a first direction moving assembly movably connected to the first direction guide rail; The second direction moving assembly includes 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 support box, and the second direction guide rail is connected to the first direction moving assembly; The excavation assembly is connected to the second direction moving assembly. 3. The rectangular section anti-sliding pile vertical pit excavation construction system according to claim 1, wherein the excavation assembly comprises a telescopic assembly, a pitching motion assembly and an azimuth motion assembly; the azimuth movement component is rotatably connected to the second direction movement component, one end of the telescopic component is hinged with the azimuth movement component, and the other end is connected to the excavation tool head component; One end of the pitching motion assembly is hinged with the azimuth motion assembly, and the other end is hinged with the telescopic assembly, and the pitching motion assembly telescopically moves to drive the telescopic assembly for pitching motion. 4 . The construction system for vertical pit excavation of rectangular cross-section anti-sliding piles according to claim 1 , wherein the excavation cutter head assembly comprises a cutter group, a power unit and a slewing unit, and the slewing unit is connected to the telescopic assembly , the power unit is connected to the rotary unit, and the power unit and the cutter group are connected in a transmission manner. 5 . The construction system for vertical pit excavation of rectangular cross-section anti-sliding piles according to claim 1 , wherein the supporting wall assembly comprises a knife frame and a plurality of groups of supporting frames, and each group of the supporting frames is detachable in sequence along the longitudinal direction. 6 . ground connection, the knife frame is connected to the support frame at the bottom end; Each group of the support frames includes two first-direction support walls and two second-direction support walls; The two first-direction supporting walls are arranged at intervals, the two second-direction supporting walls are respectively arranged on both sides of the first-direction supporting walls, and the second-direction supporting walls are respectively vertically connected Two said first direction support walls. 6 . The construction system for vertical pit excavation of rectangular cross-section anti-sliding piles according to claim 1 , wherein the main support box is provided with a plurality of lateral hydraulic support assemblies, and each of the lateral hydraulic support assemblies extends along the The circumferential direction of the main support box is arranged in sequence, and the lateral hydraulic support assemblies have an extended state and a retracted state. In the extended state, each of the lateral hydraulic support assemblies abuts against the support wall on the component. 7. The construction system for vertical pit excavation of rectangular cross-section anti-sliding piles according to claim 1, characterized in that, further comprising a cooling and separation sub-system, and the cooling and separation sub-system comprises a cooling water pump station and a cooling water pipeline; The cooling water line extends to the excavation sub-system. 8 . The construction system for vertical pit excavation of rectangular cross-section anti-sliding piles according to claim 1 , further comprising a slag discharge sub-system, the slag discharge sub-system comprising a front-end mud recovery pump station, a front-end recovery pipeline, a back-end End recovery pump station, back end recovery pipeline, main box built-in pipeline, muck recovery box; The slag recovery box is arranged on the concrete platform of the foundation pit, the front-end mud recovery pump station is respectively connected to the front-end recovery pipeline and the pipeline built in the main box, and the front-end recovery pipeline extends to the excavation The rear-end recovery pipeline is respectively connected to the main box built-in pipeline and the front-end mud recovery pump station, and the rear-end recovery pump station is arranged on the front-end mud recovery pump station or the rear-end recovery pipeline. 9. The rectangular section anti-sliding pile vertical pit excavation construction system according to claim 1, characterized in that: The slag recovery box is connected with a backwater separation device, and the backwater separation device is connected with the cooling water pump station. 10. The construction system for vertical pit excavation of rectangular cross-section anti-sliding piles according to claim 1, characterized in that it further includes a concrete filling sub-system, and the concrete filling sub-system is connected to the lifting device; The concrete filling sub-system includes a sliding water injection unit, a pipeline assembly, and a concrete pumping assembly; An injection hole is provided on the supporting wall assembly, and both the sliding water injection unit and the pipeline assembly can be connected to the injection hole.

Images