CN113338374B - Grooving platform for underground diaphragm wall - Google Patents

Abstract

The utility model relates to a technical field of underground continuous wall construction, to the problem of grooving machine direct easy clamping ring cable pit when being under construction in the cable pit top, provided an underground continuous wall grooving platform, set up the support plate in the cable pit top including the level, support plate covers the projection of cable pit at the horizontal plane at the projection of horizontal plane, underground continuous wall grooving platform is still including setting up a plurality of shoring pieces in leading the ditch, and a plurality of shoring piece relative both sides respectively with two sets of wall butt of leading. This application has the effect that makes the cable pit be difficult for being damaged by grooving machine pressure.

Description

Grooving platform for underground diaphragm wall

Technical Field

The application relates to the technical field of underground continuous wall construction, in particular to a grooving platform for an underground continuous wall.

Background

An underground diaphragm wall is a diaphragm wall constructed by intercepting water, preventing seepage, retaining soil and weighing under the ground, and is widely used when underground buildings such as basements, underground streets and underground railways are constructed.

The trench is excavated through a trenching machine, sludge and residues at the bottom of the trench are removed after the trench is excavated, the joint pipe and the reinforcement cage are placed in the trench, underwater concrete is injected into the trench, and then the joint pipe is pulled out, so that the pouring of the underground diaphragm wall is completed. Before the trenching of the trenching machine, a guide trench 5 (refer to fig. 1) needs to be excavated on the ground, after the excavation of the guide trench 5 is completed, an inverted L-shaped guide wall 51 (refer to fig. 1) is built on the inner walls of two opposite sides of the guide trench, the guide wall 51 is generally formed by pouring reinforced concrete, and the guide wall 51 plays a role of guiding a grab bucket of the subsequent trenching machine.

In view of the above technical solutions, the inventors consider that the following drawbacks exist: various cable ditches are distributed in the city underground, when underground diaphragm wall construction is carried out on the ground distributed in the cable ditches, guide ditches can only be arranged near the cable ditches 10 (refer to fig. 1) according to construction requirements, so that the trenching machine inevitably needs to be constructed above the cable ditches 10, the trenching machine belongs to a heavy instrument, the cable ditches 10 can be collapsed after being placed above the cable and cable ditches 10 for a long time, and pipelines in the cable ditches 10 can be damaged in serious conditions, so that an improvement space exists.

Disclosure of Invention

In order to make difficult crushing cable pit when the trenching machine construction, this application provides an underground continuous wall trenching platform.

The application provides a platform is grooved to underground continuous wall adopts following technical scheme:

the utility model provides an underground continuous wall grooving platform, includes that the level sets up the support plate in the cable pit top, the projection of support plate at the horizontal plane covers the cable pit at the horizontal plane, and underground continuous wall grooving platform still includes erects a plurality of shoring pieces in leading the ditch, the both sides that the shoring piece is relative respectively with two sets of wall butts of leading.

Through adopting above-mentioned technical scheme, go the trenching machine to the support plate on, enlarge the area of contact of trenching machine and cable pit through the support plate, the diffusion of the gravity load of the trenching machine of being convenient for, make the gravity load of trenching machine be difficult for acting on the cable pit top all the time, and then make the cable pit difficult for collapsing by the trenching machine, setting through the kicking piece, make the gravity load of trenching machine act on to the wall of leading that the trench is close to support plate one side, gravity load can in time be transmitted to the wall of leading of the relative one side of trench through the kicking piece on, make the gravity of trenching machine be difficult for acting on the wall of leading of trench one side all the time, be favorable to reducing the circumstances of leading the wall damage.

Preferably, the support plate comprises a first bearing plate and a second bearing plate, the first bearing plate is horizontally arranged, the second bearing plate is erected above the first bearing plate, a plurality of main I-shaped steels are further arranged between the first bearing plate and the second bearing plate, and two groups of wing plates of the main I-shaped steels are fixedly connected with one sides, close to each other, of the first bearing plate and the second bearing plate respectively.

Through adopting above-mentioned technical scheme, be provided with a plurality of main I-steel through between first load board and the second load board, be favorable to improving first load board and second load board bending resistance between them for when the trenching machine was placed on supporting the plate, the difficult bending deformation that produces of supporting the plate, and then be favorable to promoting the wholeness ability and the mechanical properties of supporting the plate, make supporting the plate more durable.

Preferably, a fixed shaft is horizontally erected on the upper surface of the first bearing plate, the axis direction of the fixed shaft is perpendicular to the length direction of the guide channel, two ends of the fixed shaft extend out of two opposite sides of the supporting plate respectively, the end parts of two ends of the fixed shaft are coaxially and rotatably connected with a roller for supporting the first bearing plate, a spring is arranged between the first bearing plate and the fixed shaft, and two ends of the spring are respectively connected with the first bearing plate and the fixed shaft.

Through adopting above-mentioned technical scheme, the removal of plate is supported to the accessible gyro wheel, make the removal of supporting the plate more simple and convenient, and then be convenient for support the plate and remove to next construction station, setting through the spring, when the trenching machine was placed in second load board top, gravity through the trenching machine orders about the spring tensile, drive first load board and ground butt, and then the area of contact through first load board increase and cable pit, make the gravity load of trenching machine can be through first load board to diffusion all around, leave the back on the second load board as the trenching machine, the spring reverts to initial condition, and then drive first load board and keep away from ground, when making the gyro wheel rotate to drive the removal of supporting the plate, first load board is difficult for taking place the friction with ground, make the removal of supporting the plate more simple and convenient.

Preferably, the jacking piece comprises a main fixing plate, the bottom side of the main fixing plate is abutted against the top end of the guide channel, two sets of opposite abutting plates are vertically arranged on the lower surface of the main fixing plate, the two sets of abutting plates are respectively abutted against the two sets of guide walls, a plurality of auxiliary h-shaped steels are further arranged between the two sets of abutting plates, and two ends of each auxiliary h-shaped steel are respectively fixedly connected with one side, close to the two sets of abutting plates, of each other.

By adopting the technical scheme, the two groups of abutting plates are abutted with the two groups of guide walls respectively, and the auxiliary I-shaped steel is arranged between the two groups of guide walls, so that when the gravity load is diffused to the guide wall on one side of the guide channel, the gravity load can be transmitted to the guide wall on the other side through the auxiliary I-shaped steel in time, and the guide wall is not easy to be damaged due to long-term stress; meanwhile, the two groups of abutting plates are not easy to bend and deform due to the arrangement of the auxiliary I-shaped steel, and the service life of the jacking piece is prolonged.

Preferably, the outer wall of the bottom of the fixed shaft is vertically and downwardly provided with a limiting rod, and one end, far away from the fixed shaft, of the limiting rod penetrates through the first bearing plate.

Through adopting above-mentioned technical scheme, wear to locate first load board through the one end that the fixed axle was kept away from to the gag lever post for the spring can remain the flexible of vertical direction throughout, when making the trenching machine place in the backup pad, first load board can be better with ground butt.

Preferably, second bearing plate upper surface is provided with a plurality of bracing pieces, and is a plurality of bracing piece and a plurality of shoring piece one-to-one, the bracing piece level is provided with the sleeve pipe, the sleeve pipe axis direction sets up with guide channel length direction is perpendicular, the coaxial rotation of sleeve pipe is connected with the axis of rotation, the one end fixedly connected with connecting rod of axis of rotation orientation guide channel, the connecting rod is the T type setting with the axis of rotation, the one end of connecting rod and the articulated setting of the shoring piece that corresponds, the axis of rotation of shoring piece is parallel with the axis of rotation, the sleeve pipe still is provided with and is used for restricting axis of rotation pivoted retaining member.

Through adopting above-mentioned technical scheme for the top support piece can be along with supporting plate piece together removal, is favorable to reducing the condition that needs removed supporting plate piece and top support piece respectively. When the supporting plate needs to be moved, the locking piece is opened, the connecting rod is swung around the rotation axis of the rotation shaft, so that the connecting rod drives the jacking piece to move in the direction away from the guide groove until the jacking piece is separated from the guide groove, the rotation shaft is limited to rotate through the locking piece, when the supporting plate moves, the jacking piece cannot rub against two groups of guide walls, and the supporting plate can move more smoothly.

Preferably, the connecting rod is kept away from the one end of piece of shoring and still is articulated to have a connecting piece, the axis of revolution of connecting piece is parallel with the axis of revolution of axis of rotation, the both sides that the connecting piece is relative all rotate and are connected with the pulley, two sets of the pulley is used for respectively leading the wall butt with two sets of, the axis of revolution of pulley sets up with the axis of revolution of axis of rotation is perpendicular.

Through adopting above-mentioned technical scheme, when the removal of supporting the plate needs, revolute the axis swing connecting rod of axis of rotation, insert the guide way and two sets of pulleys respectively with two sets of wall butts until the connecting piece is vertical for supporting the plate and can moving along the length direction of guide way all the time, make the piece of shoring just right with the guide way all the time, and then be convenient for insert the piece of shoring to the guide way in through the swing connecting rod.

Preferably, the retaining member includes that the screw thread wears to locate the bolt of sleeve pipe outer wall, the bolt stretches into to the sleeve pipe inner chamber and supports tightly with the axis of rotation.

By adopting the technical scheme, when the rotation of the rotating shaft is required to be limited, the bolt is screwed until the outer wall of the rotating shaft abuts tightly, so that the movement of the rotating shaft can be limited; the rotation of the rotating shaft can be realized by unscrewing the bolt, so that the position adjustment of the rotating shaft is simpler and more convenient.

Preferably, a fine sand layer covers between the supporting plate and the cable trench, and the thickness of the fine sand layer is larger than 3cm and smaller than 6 cm.

By adopting the technical scheme, the fine sand layer is arranged, and the ground is leveled by utilizing the fine sand layer, so that the support plate can be more smoothly placed on the cable trench, and the trenching machine can be more stably placed on the support plate; meanwhile, the gravity load of the grooving machine acting on the supporting plate can be diffused all around more quickly through the fine sand layer, so that the cable trench is not easy to crush.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the arrangement of the supporting plate is beneficial to increasing the contact area of the grooving machine and the cable trench through the supporting plate, so that the gravity load of the grooving machine can be diffused to the periphery through the supporting plate, the gravity load of the grooving machine is not easy to be pressed on the cable trench all the time, and the cable trench is not easy to be crushed by the grooving machine;

2. the two ends of the fixed shaft are coaxially and rotatably connected with rollers for supporting the first bearing plate, so that the movement of the supporting plate is facilitated through the rolling of the rollers; the spring is arranged between the fixed shaft and the first bearing plate, so that the first bearing plate is driven to be abutted against the ground through the gravity load of the trenching machine, the contact area of the trenching machine and the cable trench can be increased through the first bearing plate, and the gravity load of the trenching machine can be diffused through the first bearing plate;

3. the fine sand layer is arranged, so that the ground can be leveled conveniently, and the support plate can be placed more stably; meanwhile, the arrangement of the fine sand layer is favorable for accelerating the diffusion of the gravity load of the trenching machine.

Drawings

FIG. 1 is a schematic view of a slot forming machine of an embodiment positioned on a support plate;

FIG. 2 is a partial schematic structural view illustrating a support plate according to an embodiment;

FIG. 3 is an enlarged view of part A of the first embodiment;

FIG. 4 is a schematic view of the overall structure of the second embodiment;

fig. 5 is an enlarged schematic view of a portion B in fig. 4.

Description of reference numerals: 1. a ground surface; 10. a cable trench; 11. a fine sand layer; 2. a grooving machine; 3. a support plate; 31. a first force bearing plate; 32. a second bearing plate; 33. main I-steel; 34. a fixed shaft; 341. a limiting rod; 342. a limiting hole; 35. a roller; 36. a spring; 4. a top support; 41. a main fixing plate; 411. a main hinge base; 42. a butt joint plate; 43. auxiliary I-steel; 5. a guide channel; 51. a guide wall; 6. a support bar; 60. a bolt; 61. a sleeve; 62. a rotating shaft; 63. a connecting rod; 7. a connecting member; 71. an auxiliary fixing plate; 711. a secondary hinge base; 72. a vertical plate; 721. a supporting seat; 73. a pulley.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses underground continuous wall grooving platform

Example one

Referring to fig. 1 and 2, the underground continuous wall grooving platform comprises a supporting plate 3 and two groups of supporting pieces 4, wherein the supporting plate 3 is arranged above a cable trench 10 and used for placing a grooving machine 2, the projection of the supporting plate 3 on the horizontal plane covers the projection of the cable trench 10 on the horizontal plane, the two groups of supporting pieces 4 are arranged in a guide trench 5, and two opposite sides of each supporting piece 4 are respectively abutted to two groups of opposite guide walls 51 in the guide trench 5. Increase the area of contact of grooving machine 2 and cable pit 10 through supporting plate 3 for the gravity of grooving machine 2 can diffuse through supporting plate 3, is favorable to reducing the gravity load of grooving machine 2 and concentrates the long-time condition that leads to cable pit 10 to be crushed above cable pit 10. The top support member 4 supports the two sets of guide walls 51, so that the gravity load of the guide wall 51 of the grooving machine 2 acting on one side of the guide groove 5 can be timely transmitted to the guide wall 51 on the other side of the guide groove 5 through the top support member 4, and the guide wall 51 in the guide groove 5 is not easy to damage.

Referring to fig. 1 and 2, a fine sand layer 11 is further disposed between the support plate 3 and the ground 1, in this embodiment, the thickness of the fine sand layer 11 is 4cm, and the fine sand layer 11 is disposed to facilitate leveling of the ground 1, so that the support plate 3 can be disposed on the cable trench 10 more smoothly; meanwhile, the gravity load of the trenching machine 2 acting on the supporting plate 3 can be better diffused to the periphery through the fine sand layer 11.

Referring to fig. 1 and 2, the supporting plate 3 is rectangular plate-shaped, the length direction of the supporting plate 3 is parallel to the length direction of the guide channel 5, and the two sets of supporting members 4 are located at two ends of the supporting plate 3, so that the two sets of guide walls 51 in the guide channel 5 are supported by the supporting members 4, and the subsequent grooving construction of the guide channel 5 by the grooving machine 2 is not easily affected. The supporting plate 3 comprises a first bearing plate 31 which is horizontally arranged, a second bearing plate 32 is further erected above the first bearing plate 31, and the first bearing plate 31 and the second bearing plate 32 are oppositely arranged. A plurality of main I-shaped steels 33 are arranged between the first bearing plate 31 and the second bearing plate 32, the main I-shaped steels 33 are uniformly distributed along the length direction of the first bearing plate 31, the length direction of the main I-shaped steels 33 is parallel to the width direction of the first bearing plate 31, the upper and lower groups of wing plates of the main I-shaped steels 33 are fixedly connected with one sides of the first bearing plate 31 and the second bearing plate 32, which are close to each other, respectively, and through the arrangement of the main I-shaped steels 33, the bending strength of the first bearing plate 31 and the second bearing plate 32 is favorably improved, so that the gravity load of the trenching machine 2 is not easy to cause the support plate 3 to generate bending deformation, and the integral strength and the rigidity of the support plate 3 are favorably improved.

Referring to fig. 1 and 2, a plurality of fixing shafts 34 are horizontally erected on one side of the first bearing plate 31 facing the second bearing plate 32, and the fixing shafts 34 are uniformly distributed along the length direction of the first bearing plate 31; fixed axle 34 length direction and the parallel and fixed axle 34 of first load board 31 width direction stretch out respectively to the both ends of first load board 31 along width direction's both sides, the equal coaxial fixedly connected with gyro wheel 35 of fixed axle 34 both ends tip, gyro wheel 35 is used for propping up first load board 31, make support plate 3 can move through the roll of gyro wheel 35, make the removal of supporting plate 3 more simple and convenient, the vertical downward fixedly connected with of fixed axle 34 bottom outer wall has a plurality of springs 36, the axis evenly distributed of fixed axle 34 is followed to a plurality of springs 36, the spring 36 keeps away from the one end of fixed axle 34 all with first load board 31 fixed connection. When the trenching machine 2 is placed on the supporting plate 3, the gravity load of the trenching machine 2 drives the spring 36 to stretch downwards, so that the first bearing plate 31 is abutted against the fine sand layer 11, the gravity load of the trenching machine 2 can be diffused towards the periphery through the first bearing plate 31, and the cable trench 10 is not easy to crush.

Referring to fig. 1 and 2, the outer wall of the bottom side of the fixed shaft 34 is also vertically and downwardly fixedly connected with a limiting rod 341, one end of the limiting rod 341, which is far away from the fixed shaft 34, penetrates through the first force bearing plate 31, and the first force bearing plate 31 is also provided with a limiting hole 342 through which the limiting rod 341 penetrates, so that when the grooving machine 2 is placed on the support plate 3, the spring 36 can keep the vertical direction to stretch and retract, and the first force bearing plate 31 can be abutted to the fine sand layer 11 better.

Referring to fig. 1 and 2, the top support member 4 includes a horizontally disposed main fixing plate 41, the bottom side of the main fixing plate 41 abuts against the top end of the guide channel 5, two sets of opposite abutting plates 42 are further vertically fixed on the bottom sides of the main fixing plate 41, and the two sets of abutting plates 42 are respectively disposed in parallel with two sets of guide walls 51 in the guide channel 5; the two groups of abutting plates 42 are abutted with the two groups of guide walls 51 respectively, a plurality of auxiliary I-shaped steels 43 are further arranged between the two groups of abutting plates 42, and two ends of each auxiliary I-shaped steel 43 in the length direction are fixedly connected with one side, close to the two groups of abutting plates 42, respectively, so that when the gravity load diffused by the support plate 3 of the grooving machine 2 acts on the guide wall 51 of one side, close to the support plate 3, of the guide channel 5, the gravity load can be transmitted to the guide wall 51 of the other side of the guide channel 5 through the auxiliary I-shaped steel 43, the load is not easy to act on the guide wall 51 of one side of the guide channel 5 all the time, and the guide wall 51 in the guide channel 5 is not easy to damage; meanwhile, the arrangement of the plurality of pairs of I-shaped steel 43 is also beneficial to strengthening the overall strength of the abutting plate 42, so that the abutting plate 42 is not easy to bend and deform.

The implementation principle of the first embodiment is as follows: when the grooving platform is installed, a fine sand layer 11 is laid on the ground 1 above the cable trench 10, the supporting plate 3 is moved to the fine sand layer 11, the supporting plate 3 covers the cable trench 10, and the two groups of top supporting pieces 4 are placed into the guide trench 5. Until the bottom side of the main fixing plate 41 is abutted against the top end of the guide groove 5, and the two abutting plates 42 are respectively abutted against the two guide walls 51, through the arrangement, when the grooving machine 2 is subsequently placed on the supporting plate 3, the gravity load of the grooving machine 2 acting on the supporting plate 3 can be diffused all around through the supporting plate 3, and the situation that the gravity load of the grooving machine 2 acts on the cable groove 10 all the time to cause the cable groove 10 to collapse is favorably reduced. When the gravity load diffused by the grooving machine 2 through the supporting plate 3 acts on the guide wall 51 on one side of the guide channel 5, the gravity load can be timely transmitted to the guide wall 51 on the other side of the guide channel 5 through the top supporting piece 4, so that the guide wall 51 is not easy to bear force for a long time.

Example two

Referring to fig. 4 and 5, the second embodiment is different from the first embodiment in that: two sets of bracing pieces 6 of the vertical fixedly connected with of second load board 32 upper surface, two sets of bracing pieces 6 are located second load board 32 along length direction's both ends, the equal fixed connection sleeve pipe 61 in bracing piece 6 top, the axis direction of sleeve pipe 61 sets up perpendicularly with the length direction of leading ditch 5, sleeve pipe 61 is pegged graft towards the coaxial rotation of the one end of leading ditch 5 and is had axis of rotation 62, sleeve pipe 61's one end fixedly connected with connecting rod 63 is kept away from to axis of rotation 62, axis of rotation 62 is the setting of T type with connecting rod 63, sleeve pipe 61 still is provided with and is used for restricting axis of rotation 62 pivoted retaining member. The equal fixedly connected with of main hinged seat 411 of main fixed plate 41 upper surface, the one end of connecting rod 63 is through the articulated setting of round pin axle and main hinged seat 411, the axis of revolution of main hinged seat 411 is parallel with the axis of revolution of axis of rotation 62, through above setting, shoring piece 4 can remove with support plate 3 together, make shoring piece 4's removal more simple and convenient, when removing support plate 3, open the retaining member and pass through swing connecting rod 63, make connecting rod 63 and the articulated complex one end perk of main hinged seat 411, and then drive shoring piece 4 and break away from guide channel 5, when being favorable to reducing support plate 3 and remove, shoring piece 4 and the condition of guide channel 5 emergence friction.

Referring to fig. 4 and 5, a connecting member 7 is further disposed at an end of the connecting rod 63 away from the main hinge seat 411, the connecting member 7 includes an auxiliary fixing plate 71, the auxiliary fixing plate 71 is rectangular, a length direction of the auxiliary fixing plate 71 is perpendicular to a width direction of the guide channel 5, and a length of the auxiliary fixing plate 71 is greater than a width of the guide channel 5. Vice fixed plate 71 top side fixedly connected with is vice articulated seat 711, the one end that main articulated seat 411 was kept away from to connecting rod 63 is through the articulated setting of round pin axle and vice articulated seat 711, the axis of revolution of vice articulated seat 711 and the axis of revolution parallel arrangement of axis of rotation 62, vice fixed plate 71 deviates from the vertical board 72 of the perpendicular fixedly connected with in one side of vice articulated seat 711, vertical board 72 is the T type setting with vice fixed plate 71, the equal fixedly connected with supporting seat 721 in both sides that vertical board 72 is relative, the equal coaxial round pin axle rotation of supporting seat 721 is connected with pulley 73, the axis of revolution of two sets of pulleys 73 all is perpendicular with the axis of revolution of axis of rotation 62, two sets of gyro wheels 35 are used for two sets of wall 51 butts of leading respectively. When the supporting plate 3 needs to be moved to the next construction station, the locking part is opened and the connecting rod 63 is swung, so that the connecting rod 63 drives the connecting piece 7 to be inserted into the guide channel 5 and the two groups of pulleys 73 are respectively abutted against the two groups of guide walls 51, the supporting plate 3 can be moved along the length direction of the guide channel 5 all the time, and the supporting piece 4 can be conveniently inserted into the guide channel 5 through the swinging connecting rod 63. When the sub-fixing plate 71 abuts against the top end of the guide channel 5, the top support member 4 is located above the guide channel 5, so that when the supporting plate 3 moves, the top support member 4 is not easily rubbed against the two sets of guide walls 51 in the guide channel 5.

Referring to fig. 4 and 5, the locking member includes a bolt 60 threaded through the outer wall of the sleeve 61, the bolt 60 is located at the top end of the sleeve 61, and one end of the bolt 60 extends into the inner cavity of the sleeve 61 and abuts against the outer wall of the rotating shaft 62.

The implementation principle of the second embodiment is as follows: when the grooved platform is installed, covering a fine sand layer 11 on the ground 1 above the cable trench 10, moving the support plate 3 to the fine sand layer 11, enabling the two groups of top supports 4 to be located above the guide trench 5, swinging the connecting rod 63, putting the top supports 4 into the guide trench 5 until the main fixing plate 41 is abutted to the top end of the guide trench 5, and screwing the bolt 60 to enable the bolt 60 to be abutted to the outer wall of the rotating shaft 62; when the position of the supporting plate 3 is moved, the locking bolt 60 is unscrewed, the connecting rod 63 is swung, the connecting piece 7 is inserted into the guide groove 5, the two groups of pulleys 73 are respectively abutted against the two groups of guide walls 51 in the guide groove 5, after the bottom side of the auxiliary fixing plate 71 is abutted against the top end of the guide groove 5, the bolt 60 is screwed to enable the bolt 60 to abut against the outer wall of the rotating shaft 62, the supporting plate 3 can be moved along the length direction of the guide groove 5 all the time, meanwhile, the supporting piece 4 can be located above the guide groove 5 all the time, after the supporting plate 3 reaches a specified station, the position can be directly placed into the supporting piece 4 to the guide groove 5 through the swinging connecting rod 63 without being adjusted, and the supporting piece 4 is convenient to be installed.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (6)

1. The utility model provides an underground continuous wall grooving platform which characterized in that: the underground continuous wall grooving platform comprises a supporting plate (3) horizontally arranged above a cable trench (10), wherein the projection of the supporting plate (3) on the horizontal plane covers the projection of the cable trench (10) on the horizontal plane, the underground continuous wall grooving platform further comprises a plurality of supporting pieces (4) erected in guide trenches (5), and two opposite sides of each supporting piece (4) are respectively abutted to two groups of guide walls (51);

the supporting plate (3) comprises a first bearing plate (31) and a second bearing plate (32), the first bearing plate (31) is horizontally arranged, the second bearing plate (32) is erected above the first bearing plate (31), a plurality of main I-beams (33) are further arranged between the first bearing plate (31) and the second bearing plate (32), and two groups of wing plates of the main I-beams (33) are fixedly connected with one sides, close to each other, of the first bearing plate (31) and the second bearing plate (32) respectively;

the upper surface of the second bearing plate (32) is provided with a plurality of supporting rods (6), the supporting rods (6) are in one-to-one correspondence with the supporting pieces (4), the supporting rods (6) are horizontally provided with sleeves (61), the axial direction of each sleeve (61) is perpendicular to the length direction of each guide groove (5), each sleeve (61) is coaxially and rotatably connected with a rotating shaft (62), one end, facing the corresponding guide groove (5), of each rotating shaft (62) is fixedly connected with a connecting rod (63), each connecting rod (63) and each rotating shaft (62) are arranged in a T shape, one end of each connecting rod (63) is hinged with the corresponding supporting piece (4), the rotating axis of each supporting piece (4) is parallel to that of the corresponding rotating shaft (62), and each sleeve (61) is further provided with a locking piece for limiting the rotation of the corresponding rotating shaft (62);

the one end that the top support piece (4) was kept away from in connecting rod (63) still articulates there is connecting piece (7), the axis of revolution of connecting piece (7) is parallel with the axis of revolution of axis of rotation (62), the both sides that connecting piece (7) are relative all rotate and are connected with pulley (73), and two sets of pulley (73) are used for leading wall (51) butt with two sets of respectively, the axis of revolution of pulley (73) sets up with the axis of revolution of axis of rotation (62) is perpendicular.

2. An underground diaphragm wall trenching platform as claimed in claim 1 wherein: fixed axle (34) are erect to first load board (31) upper surface level, fixed axle (34) axis direction is perpendicular with guide slot (5) length direction, fixed axle (34) both ends are stretched out respectively to the relative both sides that support plate (3), fixed axle (34) both ends tip is all coaxial rotation to be connected with gyro wheel (35) that are used for propping up first load board (31), be provided with spring (36) between first load board (31) and fixed axle (34), spring (36) both ends are connected with first load board (31) and fixed axle (34) respectively.

3. An underground diaphragm wall trenching platform as claimed in claim 1 wherein: the top support piece (4) comprises a main fixing plate (41), the bottom side of the main fixing plate (41) is abutted to the top end of the guide channel (5), two sets of opposite abutting plates (42) are vertically arranged on the lower surface of the main fixing plate (41), the abutting plates (42) are abutted to two sets of guide walls (51) respectively, a plurality of auxiliary I-shaped steels (43) are further arranged between the abutting plates (42), and two ends of the auxiliary I-shaped steels (43) are fixedly connected with one sides, close to the two sets of abutting plates (42), of the two sides respectively.

4. An underground diaphragm wall trenching platform as claimed in claim 2 wherein: the outer wall of the bottom of the fixed shaft (34) is vertically and downwards provided with a limiting rod (341), and one end, far away from the fixed shaft (34), of the limiting rod (341) penetrates through the first bearing plate (31).

5. An underground diaphragm wall trenching platform as claimed in claim 4 wherein: the retaining member includes bolt (60) that the screw thread wore to locate sleeve pipe (61) outer wall, bolt (60) stretch into sleeve pipe (61) inner chamber and support tightly with axis of rotation (62).

6. An underground diaphragm wall trenching platform as claimed in claim 1 wherein: support plate (3) and cable pit (10) between cover have fine sand layer (11), fine sand layer (11) thickness is greater than 3cm and is less than 6 cm.

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