Movable squatting beam counter-force pushing sliding rail type TBM stepping system and method

Abstract

The invention discloses a movable squat beam counter-force pushing sliding rail type TBM stepping system and method, and relates to the technical field of full-section tunnel boring, the system comprises a track roadbed for hoisting and transporting rear corollary equipment, a main engine starting platform roadbed and an inclined shaft slope ramp in-tunnel sliding rail roadbed; the cross section of the main engine starting platform roadbed is of an isosceles trapezoid structure, a concave arc-shaped inverted arch is arranged on the top plane of an isosceles trapezoid, and shoulders are symmetrically arranged on the two sides of the inverted arch. A slide rail and a guide rail are arranged in the inverted arch; pile holes are uniformly formed in the inner side of the slide rail along the longitudinal direction of the rail; the TBM host is arranged on the inverted arch inner sliding rail; the tail end of the TBM main machine is connected with a stepping oil cylinder, the stepping oil cylinder acts on a squatting beam counter-force beam, and the squatting beam counter-force beam is inserted into a pile hole. According to the method, the immature mine TBM launching construction method technology at present can be completed, and the engineering technical problems of poor reliability, low efficiency, high cost and the like existing in the existing construction technology are solved.

Description

Technical Field

[0001] The invention relates to the technical field of full-section tunnel excavation, and in particular to a movable squat beam reaction-force jacking slide rail type TBM stepping system and method. Background Art

[0002] The construction of full-section hard rock tunnel boring machines (TBM) tunnels or lanes, a full-section tunneling technology, has developed rapidly in the construction of transportation, water conservancy, and mines in my country in recent years, becoming a hot spot in the development of geotechnical engineering construction technology. It is also a general trend for TBM to enter the field of mining construction on a large scale, including mine construction and the construction of mining area lanes and underground transportation channels. Inclined shafts or ramps are key projects in mine shaft and lane development projects, and they dominate the mine construction stage.

[0003] The start of TBM in a mine is the first step in large-scale mining projects such as mine inclined shafts, ramps, underground tunnels, etc. It is also a temporary project. It should be designed systematically according to the special conditions and needs of mine construction to gradually form a standardized temporary project, thereby promoting the development of TBM technology system in mines.

[0004] TBM stepping process or technology is usually related to engineering conditions such as TBM starting or transfer construction. Different fields and different projects have different types or methods of TBM stepping. There are many processes for TBM or shield stepping construction, such as vehicle-mounted, skateboard, tank, tunneling, etc. The slide rail stepping process is a more common choice among these stepping processes. Its principle is to place the TBM mainframe and its subsequent supporting equipment on a linear track and slide to the target working surface. Its advantage is that the steel and steel tracks are in contact, the friction resistance is small, and it is very easy to adopt. However, there are application limitations such as continuous track laying elevation and high track foundation requirements. There are also problems such as lack of professional supporting equipment and slow stepping speed. Therefore, there are scientific management problems such as poor reliability of engineering construction, low construction efficiency, unreasonable cost, etc. Summary of the invention

[0005] In order to solve the above technical problems existing in the prior art, the embodiment of the present invention provides a movable squat beam reaction force push slide rail type TBM stepping system and method. The technical solution is as follows:

[0006] On the one hand, a movable squat beam reaction-pushing slide rail type TBM stepping system is provided, comprising: a mobile track roadbed for hoisting rear supporting equipment, a main engine starting platform roadbed and a slide rail roadbed in an inclined shaft ramp; wherein the cross-section of the main engine starting platform roadbed is based on an isosceles trapezoid structure, and an arc-shaped concave inverted arch is arranged on the top surface of the isosceles trapezoid, and shoulders are symmetrically arranged on both sides of the inverted arch; the inverted arch matches the arc at the bottom end of the cutter disc of the TBM main engine; slide rails and guide rails are arranged inside the inverted arch, and pile holes are evenly arranged on the inner side of the slide rail along the longitudinal direction according to the cylinder stroke, and the pile holes are symmetrically arranged along the center line of the slide rail; the TBM main engine is erected in the inverted arch, on the slide rail and the guide rail; the tail end of the TBM main engine is connected to one end of the stepping cylinder at the slide rail position, and the other end of the stepping cylinder acts on the squat beam reaction beam, and the squat beam reaction beam is inserted into the pile hole.

[0007] Furthermore, a removable anti-sliding pile is arranged in the pile hole closest to the front end of the TBM main machine.

[0008] Furthermore, the main engine starting platform roadbed takes the main engine starting platform rail surface as the highest point and smoothly transitions to the highest rail surface elevation of the inclined shaft ramp tunnel entrance; the main engine starting platform roadbed and the main engine starting platform rail surface elevation are extended by the rear supporting equipment hoisting mobile track roadbed and road elevation.

[0009] Furthermore, the main engine starting platform roadbed is made of cast-in-place concrete, and double-layer steel bars are arranged at the bottom to form a reinforced concrete extended foundation structure.

[0010] Furthermore, the bottom width of the roadbed of the host launching platform meets the following conditions:

[0011]

[0012] The bottom width of the mobile track subgrade for the rear supporting equipment hoisting shall meet the following conditions:

[0013]

[0014] Among them, W b is the bottom width of the roadbed of the host starting platform, W hb G is the bottom width of the track subgrade for the rear supporting equipment hoisting. m is the weight of the TBM mainframe, G b , G hb are the weight of the platform and the back-up concrete foundation, respectively, k is the bearing capacity of the foundation of the main engine starting platform or the supporting roadbed, L b is the length of the roadbed of the host starting platform, G h , G hb 、f hk , Lh They are respectively the weight of the supporting bicycle, the weight of the foundation, the bearing capacity of the foundation, and the length of the bicycle.

[0015] Furthermore, the slide rail is arranged on the inner side of the guide rail; the spacing of the slide rail includes:

[0016] S r =2(R m +δ)×sin(α)

[0017] Among them, S r is the row spacing, R m is the radius of the TBM main machine, δ is the gap between the cutter head of the TBM main machine and the foundation surface, and α is the center angle of the inner slide rail.

[0018] Furthermore, the shoulder width of the platform shoulder of the main engine launching platform roadbed meets the following conditions:

[0019]

[0020] Among them, W d is the shoulder width of the shoulder, W b H is the bottom width of the main engine starting platform roadbed, b is the platform height of the main engine starting platform roadbed, and β is the increased angle of the outer slide rail.

[0021] Furthermore, the squat beam reaction beam is composed of a short beam with a rectangular thin-walled section and two standing beams with rectangular thin-walled sections welded together; wherein, a lug for connecting the stepping cylinder is welded to the side surface of the short beam at the standing beam position.

[0022] On the other hand, a movable squat beam reaction-pushing slide-rail TBM stepping method is also provided, which is applied to a movable squat beam reaction-pushing slide-rail TBM stepping system provided by the present invention; the method comprises: setting the TBM main machine on the slide rail inside the invert arch of the roadbed of the main machine starting platform, installing the squat beam reaction beam in the rear end pile hole of the TBM main machine, and lowering anti-slip piles in front of the TBM main machine; installing a stepping cylinder on the squat beam reaction beam, and the front end of the stepping cylinder is connected to the rear end of the TBM main machine; pushing the TBM main machine forward by a stepping stroke based on the stepping cylinder; judging whether the TBM main machine reaches the target position; if not, lifting the squat beam reaction beam and the anti-slip pile, and advancing the rear supporting equipment by a stepping stroke and installing the next squat beam reaction beam.

[0023] The embodiment of the present invention provides a movable squat beam reaction-pushing slide rail type TBM stepping system and method, which adopts a trapezoidal platform of an inverted arch table to provide a reliable and economically reasonable reinforced concrete expansion foundation for the TBM main machine to start; through the design of the squat beam reaction beam, a quick-installed mobile stepping power structure is provided, which is simple and convenient, and has fast construction. It can complete the currently immature mining TBM starting method technology and solve the engineering technical problems of poor engineering construction reliability, low construction efficiency and high cost in existing construction technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a schematic diagram of the overall structure of a movable squat beam reaction-force jacking slide rail type TBM stepping system provided by an embodiment of the present invention;

[0026] Figure 2 It is a front cross-sectional schematic diagram of a main engine launching platform roadbed provided by an embodiment of the present invention;

[0027] Figure 3 It is a top view of a movable squat beam reaction force jacking slide rail type TBM stepping system provided by an embodiment of the present invention;

[0028] Figure 4 It is a front cross-sectional schematic diagram of a track roadbed for hoisting a rear supporting equipment provided by an embodiment of the present invention;

[0029] Figure 5 is a front view of a squat beam reaction beam provided by an embodiment of the present invention;

[0030] Figure 6 is a side view of a squat beam reaction beam provided by an embodiment of the present invention;

[0031] Figure 7 is a top view of a squat beam reaction beam provided by an embodiment of the present invention;

[0032] Figure 8 It is a flow chart of a movable squat beam reaction-pushing slide rail type TBM stepping method provided by an embodiment of the present invention.

[0033] In the figure: 1. Mobile track foundation for hoisting of rear supporting equipment, 2. Main machine starting platform foundation, 3. Sliding rail foundation in the inclined shaft and ramp, 4. TBM main machine, 5. Sliding rail, 6. Pile hole, 7. Squatting beam reaction beam, 8. Stepping cylinder, 9. Short beam, 10. Standing pile, 11. Hanging ear, 12. Anti-slip pile, 13. Guide rail. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is described below in conjunction with the accompanying drawings.

[0035] In the embodiments of the present invention, words such as "exemplarily" and "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "example" in the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the word "example" is intended to present the concept in a specific way. In addition, in the embodiments of the present invention, the meaning expressed by "and / or" can be both, or it can be either of the two.

[0036] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0037] Embodiment 1

[0038] Figure 1 1 is a schematic diagram of the overall structure of a movable squat beam reaction push slide rail type TBM stepping system provided according to an embodiment of the present invention. Figure 1 As shown, the system includes: a rear supporting equipment hoisting mobile track roadbed 1, a main engine starting platform roadbed 2 and an inclined shaft ramp tunnel inner slide rail roadbed 3.

[0039] Figure 2 1 is a front cross-sectional schematic diagram of a host launching platform roadbed provided according to an embodiment of the present invention. Figure 2 As shown, the cross section of the main machine starting platform roadbed 2 is based on an isosceles trapezoidal structure, an arc-shaped concave inverted arch is set on the top plane of the isosceles trapezoid, and shoulders are symmetrically provided on both sides of the inverted arch; the inverted arch matches the arc at the bottom end of the cutter head of the TBM main machine 4.

[0040] In an optional implementation manner provided by an embodiment of the present invention, the cross-section of the main engine starting platform roadbed is a 45° isosceles trapezoid after the area difference of the TBM main engine cutterhead is collected, that is, the main engine starting platform roadbed is a circular arc (i.e., an inverted arch) of the cutterhead circle plus symmetrical shoulders on both sides, and the bottom surface of the pedestal is flat with a 45° slope on both sides; the main engine starting platform roadbed is buried 300-400mm deep, and the main engine starting platform roadbed takes the main engine starting platform rail surface as the highest point, and smoothly transitions to the highest rail surface elevation of the inclined shaft ramp tunnel entrance; the main engine starting platform roadbed and the main engine starting platform rail surface elevation are delayed to the supporting equipment hoisting mobile track roadbed and road elevation.

[0041] Figure 3 1 is a top view of a movable squat beam reaction force push-up slide rail type TBM stepping system provided according to an embodiment of the present invention. Figure 3 As shown, a slide rail 5 and a guide rail 13 are arranged inside the inverted arch, and pile holes 6 are evenly arranged on the inner side of the slide rail 5 along the longitudinal direction according to the cylinder stroke, and the pile holes 6 are symmetrically arranged along the center line of the slide rail; the TBM main machine 4 is erected in the inverted arch, on the slide rail 5 and the guide rail 13.

[0042] Specifically, Figure 1 As shown, the tail end of the TBM main machine 4 is connected to one end of the stepping cylinder 8 at the position of the slide rail 5, and the other end of the stepping cylinder 8 acts on the squat beam reaction beam 7, and the squat beam reaction beam 7 is inserted into the pile hole 6.

[0043] Alternatively, if Figure 1 As shown, a removable anti-sliding pile 12 is arranged in the pile hole 6 closest to the front end of the TBM main machine 4.

[0044] In an optional implementation provided by an embodiment of the present invention, the main engine launching platform roadbed is made of cast-in-place concrete, and double-layer steel bars are arranged at the bottom to form a reinforced concrete extended foundation structure.

[0045] Figure 4 1 is a front cross-sectional schematic diagram of a rear supporting equipment hoisting track roadbed provided according to an embodiment of the present invention. Figure 4 As shown in the figure, the track subgrade for hoisting of the supporting equipment can be based on the minimum thickness H of the bottom of the starting pedestal. a and load width W hb , reinforced concrete extended foundation, buried depth 200-400mm.

[0046] In such Figure 3 In the top view shown, the foundation width W of the main engine starting platform roadbed b With length L b , depending on the TBM mainframe weight G m , concrete foundation weight G b And the foundation bearing capacity f at the installation location k :

[0047]

[0048] Where: R b is the foundation surface stress, unit: MPa.

[0049] Preferably, the bottom width of the roadbed of the host launching platform meets the following conditions:

[0050]

[0051] The bottom width of the track subgrade for the rear supporting equipment hoisting must meet the following conditions:

[0052]

[0053] Among them, W b is the bottom width of the main engine starting platform roadbed, W hb The bottom width of the track subgrade for the subsequent supporting equipment hoisting, G m is the weight of the TBM mainframe, G b , G hb are the weight of the platform and the back-up concrete foundation, respectively, k L is the bearing capacity of the foundation of the main engine starting platform or the supporting roadbed. b is the length of the roadbed of the host launching platform, G h , G hb 、f hk , L h They are respectively the weight of the supporting bicycle, the weight of the foundation, the bearing capacity of the foundation, and the length of the bicycle.

[0054] Specifically, Figure 2 As shown, the slide rail 5 is arranged on the inner side of the guide rail 13; the row spacing of the slide rail 5 includes:

[0055] S r =2(R m +δ)×sin(α)

[0056] Among them, S r is the row spacing, R m is the radius of the TBM mainframe, δ is the clearance between the cutter head and the foundation surface, and α is the center angle of the slide rail.

[0057] The two pile holes are arranged symmetrically, and the distance between the pile hole center and the driving track is 750mm. Therefore, the distance between the pile holes is:

[0058] S h =2(R m +δ)×sin(α)-1500

[0059] Specifically, the shoulder width of the main engine launching platform roadbed must meet the following conditions:

[0060]

[0061] Among them, W d is the shoulder width of the shoulder, W b H is the bottom width of the main engine starting platform roadbed, b is the platform height of the main engine starting platform roadbed, and β is the increased angle of the outer slide rail.

[0062] The guide rail 13 assists the main machine to step to the hole, and its auxiliary guiding function extends from the guide platform to the hole.

[0063] Pile holes should be reserved on the guide platform foundation and arranged symmetrically along the center line of the track to serve the longitudinal advancement of the TBM and facilitate the installation of the squat beam reaction beam and the step-by-step advancement operation. However, the foundation should be safe and the force should be reasonable. The spacing of the pile holes in the longitudinal direction of the track is called the step-by-step distance S. s , determined by the stroke of the stepping cylinder, generally 1300mm.

[0064] Figure 5 is a front view of a squat beam reaction beam provided according to an embodiment of the present invention, Figure 6 is a side view of a squat beam reaction beam provided according to an embodiment of the present invention, Figure 7 FIG. 1 is a top view of a squat beam reaction beam provided according to an embodiment of the present invention. Figure 5-7 As shown, the squat beam reaction beam 7 is composed of a short beam 9 with a rectangular thin-walled cross-section and two standing piles 10 with rectangular thin-walled cross-sections welded together; wherein, a hanging ear 11 for connecting the stepping cylinder 8 is welded on the side of the short beam 9 at the position of the standing pile 10.

[0065] In the embodiment of the present invention, the rectangular cross-section of the squat beam reaction beam 7 has a simple processing technology, which is convenient for standardized design and calculation; the thin-walled steel structure is easy to reduce weight and lightweight, and is convenient for mobile construction.

[0066] In an optional implementation provided by an embodiment of the present invention, the main parameters of the squat beam reaction beam 7 are as follows:

[0067] L be - beam length, in mm, preferably 3380 mm; W be - beam width, in mm, preferably 250 mm; H be - beam height, in mm, preferably 630 mm; W hs - Width between pile holes, in mm, preferably 2020 mm; L hs - Length between pile holes, in mm, preferably 3000 mm; H h - pile hole depth, in mm, preferably 631 mm; W p - Side length of the standing pile, in mm, preferably 300 mm; H p -Standing depth, unit: mm, preferably 632mm.

[0068] In an optional implementation provided by an embodiment of the present invention, the load and constraint conditions of the squat beam reaction beam 7 are as follows:

[0069] (1) Stepper cylinder starting force F sp :

[0070] Starting force F s and the sliding force G s The sum is greater than the static friction F sf :

[0071] F sp +G sL ≥F sf →F sp ≥F sf -G sL

[0072] (2) General propulsion force F after the stepping cylinder is started np :

[0073] General propulsion force F np and the sliding force G s The sum is greater than the sliding friction F sl :

[0074] F np +G sl ≥F slf →F np ≥F sl -G slf

[0075] Among them, the host's own sliding force: G sL =G*sin(arctan(i));

[0076] Host normal force: G n =G*cos(arctan(i));

[0077] Static friction of the main engine: F sf =F n μ stf ;

[0078] Mainframe sliding friction: F slf =F n μ sl f;

[0079] The starting thrust calculation of the steel-steel slide stepping cylinder is shown in Table 1:

[0080] Table 1 Calculation table of thrust of steel-steel slide rail cylinder of foundation TBM under different descending slopes

[0081]

[0082]

[0083] The starting thrust calculation of the steel-concrete slide stepping cylinder is shown in Table 2:

[0084] Table 2 Calculation table of thrust of steel-concrete sliding static friction starting cylinder

[0085]

[0086] Table 2 can be used to set up concrete-rail mixed sliding in each continuous downhill section to solve the risk of sliding.

[0087] In an optional implementation provided by an embodiment of the present invention, the force analysis of the short beam and the standing pile is as follows:

[0088] (1) Calculation of stepping cylinder thrust:

[0089] The squat beam reaction beam is made of welded steel plates. The stepping cylinder acts directly at the center of the pile. The rectangular steel squat beam is calculated according to the shear mechanics model. Four jacks are designed. Safety measures are taken into consideration. The concrete-assisted friction method is used to calculate the maximum static friction empty push and the thrust of each jack cylinder.

[0090]

[0091] 200 / 160-1500x4 stepper cylinders are selected, each with a maximum thrust of 100 tons and a maximum stroke of 1500mm.

[0092] (2) Calculation of shear force of squat beam reaction beam standing pile:

[0093] According to the symmetry of the squat beam reaction beam structure, the forces acting on the squat beam reaction beam are all near the pile support twice, the transverse bending moment can be ignored, and the squat beam section is designed according to shear resistance. The maximum shear force Q of the squat beam b_max =F′ sp .

[0094] The maximum shear force calculation of the pile is based on the assumption that the height of the buried section of the pile in the hole and the upper section of the hole are equal, which is H p , the maximum shear force is the maximum force R at the top of the hole p _max, calculated according to the moment balance at the bottom of the hole:

[0095]

[0096] Q p_max =4F′ sp

[0097] (3) Calculation of wall thickness of short beam and pile sections:

[0098] The wall thickness calculation of short beams and pile rectangular tube sections can be designed and calculated according to the maximum shear stress:

[0099]

[0100] From this, the wall thickness calculation formula of the rectangular tube beam can be obtained:

[0101] and

[0102] Where: [τs ]----Required shear strength of rectangular tube wall material / MPa;

[0103] I z ----The moment of inertia of the rectangular tube wall cross section about the neutral axis;

[0104] --The static moment of the area on one side of the neutral axis of the cross section about the neutral axis

[0105] For a squat beam with a rectangular tube cross-section, there are neutral moments of inertia and static moments of area:

[0106]

[0107]

[0108] For the square tube cross-section standing pile, there are neutral moment of inertia and area moment of static:

[0109]

[0110] It can be seen from this that the parameter δ p , δ b Implicit in the formula, a simple calculation method can be used by empirical trial calculation.

[0111] (4) Pile hole depth and hole wall support thickness:

[0112] The hole depth of the standing pile is 1.2 times the thickness of the foundation. Since concrete cannot bear the concentrated reaction force of jacking, the pile hole is supported by steel plates. The tolerance between the inner size of the pile hole and the outer size of the steel pile is 1 to 2 mm, and the thickness of the steel plate can be equal.

[0113] In an optional implementation provided by an embodiment of the present invention, the thickness of the roadbed base of the host launching platform is designed as follows:

[0114] Bending moment Mn per unit length of guideway AA section A-A and shear force Q A-A :

[0115]

[0116]

[0117] Maximum bending stress in AA foundation section:

[0118]

[0119]

[0120] Get the foundation slab height H a :

[0121]

[0122] or:

[0123]

[0124] 2) Parameter verification and reinforcement

[0125]

[0126] Embodiment 2

[0127] Figure 8 1 is a flow chart of a movable squat beam reaction force push slide rail type TBM stepping method provided in accordance with an embodiment of the present invention, and the method is applied to a movable squat beam reaction force push slide rail type TBM stepping system provided in accordance with an embodiment of the present invention. Figure 8 As shown, the method specifically comprises the following steps:

[0128] Step S802, the TBM main machine is set on the slide rail inside the invert of the main machine starting platform roadbed, a squat beam reaction beam is installed in the rear end pile hole of the TBM main machine, and an anti-sliding pile is placed in front of the TBM main machine.

[0129] Step S804, installing a stepping cylinder on the squat beam reaction beam, and connecting the front end of the stepping cylinder to the rear end of the TBM main machine.

[0130] Step S806: Push the TBM main machine forward a stepping stroke based on the stepping cylinder.

[0131] Step S808, determining whether the TBM host has reached the target position; if not, executing step S810.

[0132] Step S810, lift the squat beam reaction beam and anti-slip piles, and move the rear supporting equipment forward one step and install the next squat beam reaction beam.

[0133] The stepping method provided in the embodiment of the present invention has the following preparations before the stepping:

[0134] 1) Before advancing, inspect the section of the starting tunnel. If there is any restricted part, deal with it in advance to avoid the shield being unable to pass.

[0135] 2) The accuracy of the embedded slide rails and reaction holes is very important and requires secondary review.

[0136] 3) It is necessary to ensure smooth communication in front of the cutter disc, and operators and inspectors should be equipped with walkie-talkies.

[0137] 4) Maintain normal lighting, pumping and drainage in the tunnel, and avoid obstruction by the TBM shield.

[0138] In an optional implementation provided by an embodiment of the present invention, intelligent safety monitoring is added during the TBM stepping process, specifically including:

[0139] (1) Pulse electronic fences are laid along the TBM mainframe and its supporting equipment; abnormal objects and people are strictly prohibited from entering the construction area.

[0140] (2) Set up TBM attitude parameter (direction, inclination) reading instrument; and 360° monitoring video.

[0141] (3) At the end of each step, each shift shall have a dedicated person to operate the wedge-shaped track guidance blocks and anti-slip piles.

[0142] (4) There shall be one main driver, video and voice control and monitoring system in front of the main engine head, and a dedicated operator.

[0143] From the above description, it can be seen that the embodiment of the present invention provides a movable squat beam reaction force push slide rail type TBM stepping system and method, which has the following technical effects compared with the prior art:

[0144] By utilizing the downward slope trend and the power of the jack, the stepping power requirements are greatly simplified and the project cost is reduced; the squat beam reaction beam design provides a mobile stepping power structure that can be quickly installed, which is simple, convenient and quick to construct; the trapezoidal platform with a 45° inclination and double-layer steel bars at the bottom provide a solid, reliable and economically reasonable reinforced concrete expansion foundation for the TBM launch; the double-track arrangement on the ground guide platform and the digital attitude indicator ensure the stability of the TBM stepping guidance; based on modern advanced sensors, electronic fencing, video and voice control, a construction stepping safety control technical method is constructed.

[0145] It should be understood that in various embodiments of the present invention, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0146] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0147] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described equipment, devices and units can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0148] In the several embodiments provided by the present invention, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0149] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0150] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A movable squat beam reaction force push slide rail type TBM stepping system, characterized in that: include: The supporting equipment hoisting mobile track roadbed, main engine starting platform roadbed and inclined shaft ramp tunnel slide rail roadbed; among them, The cross section of the main engine launching platform roadbed is based on an isosceles trapezoidal structure, and a circular arc-shaped concave inverted arch is arranged on the top surface of the isosceles trapezoid, and shoulders are symmetrically arranged on both sides of the inverted arch; the inverted arch matches the circular arc at the bottom end of the cutterhead of the TBM main engine; Slide rails and guide rails are arranged inside the inverted arch, pile holes are evenly arranged on the inner side of the slide rails along the longitudinal direction according to the stroke of the oil cylinder, and the pile holes are symmetrically arranged along the center line of the slide rails; the TBM mainframe is erected inside the inverted arch, on the slide rails and the guide rails; The tail end of the TBM main machine is connected to one end of the stepping cylinder at the position of the slide rail, and the other end of the stepping cylinder acts on the squat beam reaction beam, and the squat beam reaction beam is inserted into the pile hole.

2. The system according to claim 1, characterized in that Removable anti-sliding piles are arranged in the pile hole closest to the front end of the TBM main machine.

3. The system according to claim 1, characterized in that The main engine starting platform roadbed takes the main engine starting platform rail surface as the highest point and smoothly transitions to the highest rail surface elevation of the inclined shaft ramp tunnel entrance; the main engine starting platform roadbed and the main engine starting platform rail surface elevation extend to the rear supporting equipment hoisting mobile track roadbed and road elevation.

4. The system according to claim 1, characterized in that The main engine starting platform roadbed is made of cast-in-place concrete, and double-layer steel bars are arranged at the bottom to form a reinforced concrete extended foundation structure.

5. The system according to claim 1, characterized in that The bottom width of the main engine launching platform roadbed meets the following conditions: The bottom width of the mobile track subgrade for the rear supporting equipment hoisting shall meet the following conditions: Among them, W b is the bottom width of the roadbed of the host starting platform, W hb G is the bottom width of the track subgrade for the rear supporting equipment hoisting. m is the weight of the TBM mainframe, G b , G hb are the weight of the platform and the back-up concrete foundation, respectively, k is the bearing capacity of the foundation of the main engine starting platform or the supporting roadbed, L b is the length of the roadbed of the host originating platform, G h , G hb 、f hk , L h They are respectively the weight of the supporting bicycle, the weight of the foundation, the bearing capacity of the foundation, and the length of the bicycle.

6. The system according to claim 1, characterized in that The slide rail is arranged on the inner side of the guide rail; the spacing of the slide rail includes: S r =2(R m +δ)×sin(α) Among them, S r is the row spacing, R m is the radius of the TBM main machine, δ is the gap between the cutter head of the TBM main machine and the foundation surface, and α is the center angle of the inner slide rail.

7. The system according to claim 6, characterized in that The shoulder width of the main engine launching platform roadbed must meet the following conditions: Among them, W d is the shoulder width of the shoulder, W b H is the bottom width of the roadbed of the host starting platform, b is the platform height of the main engine starting platform roadbed, and β is the increased angle of the outer slide rail.

8. The system according to claim 1, characterized in that The squat beam reaction beam is composed of a short beam with a rectangular thin-walled section and two standing beams with rectangular thin-walled sections welded together; wherein, a lug for connecting a stepping cylinder is welded on the side of the short beam at the standing beam position.

9. A movable squat beam reaction force jacking slide rail TBM stepping method, characterized in that: A movable squat beam reaction-pushing slide rail TBM stepping system applied to claim 1; the method comprises: The TBM main machine is arranged on the slide rail inside the inverted arch of the main machine starting platform roadbed, the squat beam reaction beam is installed at the rear end pile hole of the TBM main machine, and the anti-sliding pile is placed in front of the TBM main machine; A stepping cylinder is installed on the squat beam reaction beam, and the front end of the stepping cylinder is connected to the rear end of the TBM main machine; Based on the stepping cylinder, the TBM main machine is pushed forward by a stepping stroke; Determining whether the TBM host has reached the target position; If not, lift the squat beam reaction beam and the anti-slip pile, and move the rear supporting equipment forward one step and install the next squat beam reaction beam.

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