Construction device for supplementing high-pressure jet grouting piles between groove-reserved pressure-reducing parameter-variable sequential jetting bearing platforms

Abstract

The utility model discloses a construction device for supplementing high-pressure jet grouting piles between groove-reserved pressure-reducing parameter-variable sequential jetting bearing platforms. The construction device comprises a pressure-reducing groove device, a jet grouting unit moving system and a pile casing device. According to the utility model, the frame pressure-reducing groove is enclosed at the periphery of the bearing platform, so that the influence of the soil squeezing effect of the high-pressure jet grouting piles on the bearing platform is reduced. And by installing the longitudinal moving device and the transverse moving device, flexible displacement of the jet grouting unit is achieved, and construction of jet grouting piles at multiple point positions and multiple bearing platform positions is facilitated. The pile casing device is used for fixing the pile position of the jet grouting pile, and the drill rod is positioned through the limiting ring.

Description

Technical Field

[0001] The invention relates to the technical field of construction of supplementary high-pressure rotary jetting piles, and is suitable for the construction of supplementary high-pressure rotary jetting piles between caps by retaining grooves, reducing pressure, changing parameters and sequential jetting. Background Art

[0002] During the construction of high-pressure rotary jet piles, a large amount of cement slurry will be sprayed. These high-pressure slurries will compact the surrounding soil, and the squeezed soil will further transmit this effect, thereby affecting existing structures such as buildings and pile foundations within a certain range of the high-pressure rotary jet piles and seeping in the soil. This effect may have an adverse effect on existing structures, engineering pipelines, etc. around them. If this effect is not taken into consideration, it may cause damage to adjacent existing structures.

[0003] Under this technical condition, in order to increase the bearing capacity of the foundation, it is necessary to carry out high-pressure jet grouting pile construction around the constructed cap. The soil squeezing effect of the high-pressure jet grouting pile will have an impact on the cap. Since the geological conditions of the natural foundation are relatively complex, there are large changes along the depth, and there are multiple soil layers with great differences in density, water content, soil particle composition and groundwater status. If a single technical parameter is used to spray long piles, a consolidation body with extremely uneven diameter or length will be formed, resulting in different diameters of the jet grouting piles, which will reduce the bearing capacity. In order to ensure the quality of reinforcement, different technical parameters need to be used for different depths or different soil layers according to the formation conditions at the hole position obtained during drilling, so as to reduce the disturbance to the existing cap and foundation soil. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a construction device for supplementing high-pressure rotary jet piles between caps by means of groove-leaving pressure-reducing variable-parameter sequential jetting.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] A construction device for adding high-pressure jet grouting piles between caps with groove-relief variable parameters and sequential jetting, including a pressure relief groove device, a jet grouting unit mobile system, and a casing device;

[0007] The pressure relief groove device comprises two transverse support plates and two longitudinal support plates which are arranged at a certain distance from the platform and outside the platform, and the transverse support plates and the longitudinal support plates form a frame structure, and a pressure relief groove is formed between the frame structure and the platform;

[0008] The moving system of the rotary grouting unit includes a lower track groove arranged on the top of the first bearing platform, the lower track groove extends from the top of the first bearing platform to the top of the second bearing platform, a longitudinal sliding plate movable along the lower track groove is provided, and side plates are respectively installed on both sides of the longitudinal sliding plate, and the tops of the two side plates and the longitudinal sliding plate are at the same elevation, so that the top surfaces of the two side plates and the top surface of the longitudinal sliding plate form a plate surface at the same elevation, an upper track groove is provided on the plate surface, and a transverse sliding plate movable along the upper track groove is provided on the transverse sliding plate, and a rotary grouting unit is provided on the transverse sliding plate;

[0009] The casing device includes a support arm arranged on the rotary grouting unit, and an embracing casing arranged below the top elevation of the rotary grouting pile to be constructed, the support arm is connected to the drill rod, an annular top plate is arranged on the upper part of the embracing casing, an upper casing is arranged on the upper part of the top plate, a limiting ring is arranged inside the upper casing, and the drill rod extends into the limiting ring.

[0010] Preferably, a transverse inner support is provided between two parallel transverse support plates, and a longitudinal inner support is provided between two parallel longitudinal support plates.

[0011] Preferably, a lower sliding block cooperating with the lower track groove is provided at the lower end of the longitudinal sliding plate.

[0012] Preferably, the side plates and the longitudinal sliding plates are connected via connecting ribs.

[0013] Preferably, the upper track groove and the lower track groove are arranged vertically.

[0014] Preferably, an upper sliding block cooperating with the upper track groove is provided at the lower end of the transverse sliding plate.

[0015] Preferably, a limiting rod is installed between the limiting ring and the upper casing, one end of the limiting rod is connected to the limiting ring, and the other end of the limiting rod is connected to the upper casing via a fastening bolt.

[0016] Preferably, a connecting rod is installed on the top plate, an inner clamping plate and an outer clamping plate are installed on the connecting rod, and the top plate is connected and clamped to the longitudinal support plate through the connecting rod, the inner clamping plate and the outer clamping plate.

[0017] Preferably, the connecting rod, the inner clamping plate and the outer clamping plate are connected to form an "F"-shaped structure, and the inner clamping plate and the outer clamping plate are clamped on the inner and outer sides of the longitudinal support plate respectively.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The present invention utilizes a frame pressure relief groove formed around the periphery of the cap to reduce the influence of the soil squeezing effect of the high-pressure jet grouting pile on the cap.

[0020] (2) The present invention utilizes the installation of a longitudinal moving device and a transverse moving device to realize the flexible displacement of the rotary jet grouting unit, which is beneficial to the construction of rotary jet grouting piles at multiple points and multiple base positions.

[0021] (3) The present invention utilizes a casing device to fix the position of the jet grouting pile, and realizes the positioning of the drill rod through a limiting ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of adding high-pressure jet grouting piles between caps of the present invention;

[0024] Figure 2 This is a schematic diagram of the installation of a mobile device for adding high-pressure jet grouting piles between caps of the present invention;

[0025] Figure 3 This is a schematic diagram of the construction state of the first cap supplemented with high-pressure jet grouting piles of the present invention;

[0026] Figure 4 for Figure 3 Schematic diagram of node A in the middle;

[0027] Figure 5 This is a schematic diagram of the construction status of the first cap supplemented with high-pressure jet jet piles of the present invention.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1. First bearing platform; 2. Second bearing platform; 3. Jet-jet pile; 4. Pressure relief groove; 5. Longitudinal support plate; 6. Transverse support plate; 7. Transverse inner support; 8. Longitudinal inner support; 9. Lower track groove; 10. Lower slider; 11. Longitudinal sliding plate; 12. Side plate; 13. Support; 14. Pier; 15. Connecting rib; 16. Upper track groove; 17. Upper slider; 18. Transverse sliding plate; 19. Jet-jet unit; 20. Support arm; 21. Drill rod; 22. Surrounding casing; 23. Top of jet-jet pile; 24. Top plate; 25. Upper casing; 26. Fastening bolt; 27. Limiting ring; 28. Limiting rod; 29. ​​Connecting rod; 30. Outer clamping plate; 31. Inner clamping plate; 32- bearing platform. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1:

[0032] See also Figure 1-5 As shown, in this embodiment, groove-leaving pressure-reducing variable-parameter sequential jetting to supplement high-pressure jetting piles between caps is provided, including a cap 32 that has been constructed at a set position, the cap 32 includes a first cap 1 and a second cap 2, and jetting piles 3 constructed around the cap 32, and the jetting piles 3 are arranged in a matrix.

[0033] The construction system of the jet grouting pile 3 includes a pressure relief trough device, a jet grouting unit moving system, and a casing device.

[0034] The pressure relief groove device includes: two transverse support plates 6 and two longitudinal support plates 5 arranged at a certain distance from the support platform 32, and the transverse support plates 6 and the longitudinal support plates 5 enclose a frame structure, and a pressure relief groove 4 is formed between the frame structure and the support platform 32. A transverse inner support 7 is arranged between the two parallel transverse support plates 6, and a longitudinal inner support 8 is arranged between the two parallel longitudinal support plates 5.

[0035] The moving system of the rotary grouting unit includes a plurality of lower track grooves 9 arranged at the middle position of the top of the first support platform 1, and the lower track grooves 9 extend from the top of the first support platform 1 to the top of the second support platform 2. A longitudinal sliding plate 11 that can move along the lower track groove 9 is arranged on the lower track groove 9, and a lower slider 10 that cooperates with the lower track groove 9 is arranged at the lower end of the longitudinal sliding plate 11. The lower slider 10 is arranged in the lower track groove 9 and can move along the lower track groove 9. Side plates 12 are respectively installed on both sides of the longitudinal sliding plate 11, and a support 13 and a buttress 14 are arranged between the side plates 12 and the top surface of the support platform 32. The two side plates 12 are connected to the longitudinal sliding plate 11 through a connecting rib 15. The tops of the two side plates 12 and the longitudinal sliding plate 11 are at the same elevation, so that the top surfaces of the two side plates 12 and the top surface of the longitudinal sliding plate 11 form a plate surface with the same elevation, and an upper track groove 16 is arranged on the plate surface, and the upper track groove 16 is arranged vertically with the lower track groove 9. The upper track groove 16 is provided with a transverse sliding plate 18 which can move along the upper track groove 16. The lower end of the transverse sliding plate 18 is provided with an upper slider 17 which cooperates with the upper track groove 16. The upper slider 17 is provided in the upper track groove 16 and can move along the upper track groove 16. A rotary spraying unit 19 is provided on the transverse sliding plate 18.

[0036] The casing device includes a support arm 20 arranged on the jet grouting unit 19, and an embracing casing arranged below the top elevation of the jet grouting pile to be constructed. The support arm 20 is connected with a drill rod 21, and the drill rod 21 is positioned at the pile position of the jet grouting pile 3 to be constructed. An annular top plate 24 is arranged on the top of the embracing casing 22, and an upper casing 25 is arranged on the top of the top plate 24. A limit ring 27 is installed inside the upper casing 25, and a limit rod 28 is arranged between the limit ring 27 and the upper casing 25. One end of the limit rod 28 is connected to the limit ring 27, and the other end of the limit rod 28 is connected to the upper casing 25 through a fastening bolt 26. The drill rod 21 extends into the limit ring 27. The top plate 24 is connected and clamped to the longitudinal support plate 5 through a connecting rod 29, an inner clamping plate 31, and an outer clamping plate 30. The connecting rod 29 , the inner clamping plate 31 and the outer clamping plate 30 are connected to form an “F”-shaped structure, and the inner clamping plate 31 and the outer clamping plate 30 are clamped on the inner and outer sides of the longitudinal support plate 5 respectively.

[0037] Embodiment 2:

[0038] See also Figure 1-5 As shown, in this embodiment, a construction method for additional high-pressure jet grouting piles between caps with grooved pressure reduction and variable parameters in sequence is provided, comprising the following steps:

[0039] Step 1: Set up the pressure relief tank 4:

[0040] Two transverse support plates 6 and two longitudinal support plates 5 are constructed on the periphery of the constructed foundation 32 and at a certain distance from the foundation 32 . The transverse support plates 6 and the longitudinal support plates 5 form a frame structure, and a pressure relief groove 4 is formed between the frame structure and the foundation 32 .

[0041] Furthermore, a transverse inner support 7 is provided between two parallel transverse support plates 6, and the two parallel transverse support plates 6 are reinforced by the transverse inner support 7; a longitudinal inner support 8 is provided between two parallel longitudinal support plates 5, and the two parallel longitudinal support plates 5 are reinforced by the longitudinal inner support 8.

[0042] Step 2: Install the vertical moving device:

[0043] A plurality of lower track grooves 9 are installed at the middle position of the top of the first support platform 1 , and the lower track grooves 9 extend from the top of the first support platform 1 to the top of the second support platform 2 , and a longitudinal sliding plate 11 movable along the lower track grooves 9 is arranged.

[0044] Furthermore, a lower slider 10 is provided at the lower end of the longitudinal sliding plate 11 to cooperate with the lower track groove 9;

[0045] Furthermore, side panels 12 are respectively installed on both sides of the longitudinal sliding plate 1, and supports 13 and piers 14 are set between the side panels 12 and the top surface of the base 32, and the side panels 12 are supported by the supports 13 and the piers 14; connecting ribs 15 are set between the two side panels 12 and the longitudinal sliding plate 11, and the connection between the side panels 12 and the longitudinal sliding plate 11 is achieved through the connecting ribs 15.

[0046] Step 3: Install the lateral movement device:

[0047] The top of the two side plates 12 and the longitudinal sliding plate 11 are at the same elevation, and the top surface of the two side plates 12 and the top surface of the longitudinal sliding plate 11 form a plate surface at the same elevation, on which an upper track groove 16 is installed, and a transverse sliding plate 18 that can move along the upper track groove 16 is set.

[0048] Furthermore, the upper track groove 16 and the lower track groove 9 are arranged vertically.

[0049] Furthermore, an upper sliding block 17 cooperating with the upper track groove 16 is provided at the lower end of the transverse sliding plate 18 .

[0050] Step 4: Install the rotary spraying unit 19:

[0051] A rotary spraying unit 19 is installed on the transverse sliding plate 18 .

[0052] Step 5: Install the casing device:

[0053] An encircling casing 22 is installed below the elevation of the top 23 of the jet grouting pile to be constructed, an annular top plate 24 is installed on the upper part of the encircling casing 22 , and an upper casing 25 is installed on the upper part of the top plate 24 .

[0054] Furthermore, a limit ring 27 is installed inside the upper casing 25, and a limit rod 28 is installed between the limit ring 27 and the upper casing 25, one end of the limit rod 28 is connected to the limit ring 27, and the other end of the limit rod 28 is connected to the upper casing 25 through a fastening bolt 26, and the limit ring 27 is fixed inside the upper casing 25 through the limit rod 28.

[0055] Furthermore, a connecting rod 29 is installed on the top plate 24 , and an inner clamping plate 31 and an outer clamping plate 30 are installed on the connecting rod 29 . The top plate 24 is connected and clamped to the longitudinal support plate 5 through the connecting rod 29 , the inner clamping plate 31 , and the outer clamping plate 30 .

[0056] Step 6: Construction of the jet grouting piles 3 around the first cap 1:

[0057] The longitudinal sliding plate 11 moves to the top surface of the first pedestal 1, and a support 13 and a pier 14 are arranged between the side plate 12 and the top surface of the second pedestal 2 to achieve stable positioning of the jet grouting unit 19; the drill rod 21 is connected through the support arm 20 on the jet grouting unit 19, the drill rod 21 is positioned at the pile position of the jet grouting pile 3 to be constructed, the drill rod 21 extends into the limit ring 27, and the drill rod 21 is used for jet grouting construction.

[0058] Furthermore, by sliding the transverse sliding plate 18 in the upper track groove 16 , the jet grouting unit 19 is positioned at different transverse positions, thereby realizing the construction of the jet grouting piles 3 at various points around the first bearing platform 1 .

[0059] Furthermore, according to the geological conditions at the hole location obtained during drilling, different technical parameters are used for different depths or different soil layers. The injection time is extended for hard soil, deep soil layers and gravel with large soil particles, and the lifting speed and swing speed are appropriately slowed down or the injection pressure and pump volume are increased.

[0060] Step 7: The rotary spraying unit 19 moves to the top of the second support platform 2:

[0061] The rotary jet grouting unit 19 and the transverse sliding plate 18 are placed on the longitudinal sliding plate 11, and the longitudinal sliding plate 11 slides on the lower track groove 9 to realize the positioning of the rotary jet grouting unit 19 at different longitudinal positions, and to realize the movement of the rotary jet grouting unit 19 from the top surface of the first support platform 1 to the top surface of the second support platform 2; when the longitudinal sliding plate 11 moves to the top surface of the second support platform 2, a support 13 and a pier 14 are set between the side plate 12 and the top surface of the second support platform 2 to realize the stable positioning of the rotary jet grouting unit 19.

[0062] Step 8: Construction of the jet grouting piles 3 around the second cap 2:

[0063] The jet grouting piles 3 around the second cap 2 are constructed using the same method as step six.

[0064] The installation positioning and connection fixation of the high-pressure rotary jet piles for supplementing between the caps by leaving grooves for decompression and sequential jetting with variable parameters are achieved by the above-mentioned construction method for the high-pressure rotary jet piles for supplementing between the caps by leaving grooves for decompression and sequential jetting with variable parameters.

Claims

1. A construction device for adding high-pressure jet grouting piles between caps with grooves, pressure reduction, variable parameters and sequence jetting, characterized in that: It includes pressure relief tank device, rotary grouting unit moving system and casing device; The pressure relief groove device comprises two transverse support plates (6) and two longitudinal support plates (5) which are arranged on the periphery of the support platform (32) and spaced a certain distance from the support platform (32); the transverse support plates (6) and the longitudinal support plates (5) form a frame structure, and a pressure relief groove (4) is formed between the frame structure and the support platform (32); The rotary grouting unit moving system comprises a lower track groove (9) arranged on the top of the first support platform (1), the lower track groove (9) extending from the top of the first support platform (1) to the top of the second support platform (2), a longitudinal sliding plate (11) movable along the lower track groove (9), side plates (12) respectively installed on both sides of the longitudinal sliding plate (11), the tops of the two side plates (12) and the longitudinal sliding plate (11) being at the same elevation, so that the top surfaces of the two side plates (12) and the top surface of the longitudinal sliding plate (11) form a plate surface at the same elevation, an upper track groove (16) being arranged on the plate surface, a transverse sliding plate (18) movable along the upper track groove (16), and a rotary grouting unit (19) being arranged on the transverse sliding plate (18); The casing device comprises a support arm (20) arranged on a jet grouting unit (19), and an embracing casing (22) arranged below the elevation of a top end (23) of a jet grouting pile to be constructed, the support arm (20) being connected to a drill rod (21), an annular top plate (24) being arranged on the upper part of the embracing casing (22), an upper casing (25) being arranged on the upper part of the top plate (24), a limiting ring (27) being arranged inside the upper casing (25), and the drill rod (21) extending into the limiting ring (27).

2. The construction device for supplementing high-pressure jet grouting piles between caps with groove-retaining pressure reduction and variable parameters in sequence according to claim 1 is characterized in that: A transverse inner support (7) is arranged between two parallel transverse support plates (6), and a longitudinal inner support (8) is arranged between two parallel longitudinal support plates (5).

3. The construction device for supplementing high-pressure jet grouting piles between caps with groove-retaining pressure reduction and variable parameters in sequence according to claim 1 is characterized in that: A lower sliding block (10) matching with the lower track groove (9) is arranged at the lower end of the longitudinal sliding plate (11).

4. The construction device for supplementing high-pressure jet grouting piles between caps with groove-retaining pressure reduction and variable parameters in sequence according to claim 1 is characterized in that: The side plate (12) and the longitudinal sliding plate (11) are connected via a connecting rib (15).

5. The construction device for supplementing high-pressure jet grouting piles between caps with groove-retaining pressure reduction and variable parameters in sequence according to claim 1 is characterized in that: The upper track groove (16) and the lower track groove (9) are arranged vertically.

6. The construction device for supplementing high-pressure jet grouting piles between caps with groove-retaining pressure reduction and variable parameters in sequence according to claim 1 is characterized in that: An upper sliding block (17) matched with the upper track groove (16) is provided at the lower end of the transverse sliding plate (18).

7. The construction device for supplementing high-pressure jet grouting piles between caps with groove-retaining pressure reduction and variable parameters in sequence according to claim 1 is characterized in that: A limiting rod (28) is installed between the limiting ring (27) and the upper casing (25), one end of the limiting rod (28) is connected to the limiting ring (27), and the other end of the limiting rod (28) is connected to the upper casing (25) via a fastening bolt (26).

8. The construction device for supplementing high-pressure jet grouting piles between caps with groove-retaining pressure reduction and variable parameters in sequence according to claim 1 is characterized in that: A connecting rod (29) is installed on the top plate (24), and an inner clamping plate (31) and an outer clamping plate (30) are installed on the connecting rod (29). The top plate (24) is connected and clamped to the longitudinal support plate (5) through the connecting rod (29), the inner clamping plate (31) and the outer clamping plate (30).

9. The construction device for supplementing high-pressure jet grouting piles between caps with groove-retaining pressure reduction and variable parameters in sequence according to claim 8 is characterized in that: The connecting rod (29), the inner clamping plate (31) and the outer clamping plate (30) are connected to form an "F"-shaped structure. The inner clamping plate (31) and the outer clamping plate (30) are clamped on the inner and outer sides of the longitudinal support plate (5) respectively.

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