CN218713106U - Excavation foundation ditch safety support device - Google Patents

Abstract

The utility model belongs to the technical field of excavation supporting, specifically provide an excavation foundation ditch safety support device, including hole wall, fender pile, inflation anchor and tie plate, the fender pile is along the vertical setting of deciding of hole wall array distribution, inflation anchor top-down array distribution runs through and locates the fender pile lateral wall, tie plate top-down array distribution slides and locates the fender pile lateral wall, tie plate both sides wall slides the joint with adjacent fender pile lateral wall respectively. The utility model discloses a mode that nested brill went into carries out the anchor locking to equipment, utilizes the extrusion that mutual motion and special inclined plane produced to realize the automatic anchor that expands, realizes the inflation with the help of taking out the resistance of the soil body when leaving again and removes, is showing under the prerequisite of guaranteeing excavation supporting validity and has promoted the efficiency of construction of strutting, and has realized material cyclic utilization, has effectively solved the problem that current supporting technology is difficult to realize material turnover and high-efficient construction.

Description

Excavation foundation ditch safety support device

Technical Field

The utility model belongs to the technical field of the excavation supporting, specifically indicate an excavation foundation ditch safety support device.

Background

During construction engineering construction, a foundation pit needs to be excavated to build an underground structure, and during the period from excavation of the foundation pit to backfill of the foundation pit, in order to ensure the safety of construction of the underground structure and the surrounding environment of the foundation pit, the side wall and the surrounding environment of the foundation pit need to be protected by adopting retaining and reinforcing measures, so that the foundation pit is prevented from generating excessive deformation or collapse.

The foundation pit supporting device which is convenient and fast to construct, high in reliability and capable of taking out supporting materials after foundation pit construction is finished and remarkably reducing foundation pit supporting investment is lacked in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes prior art's is not enough, a excavation foundation ditch safety support device is provided, this supporting device carries out the anchor locking to equipment through the mode that nested brill goes into, the squeezing action that utilizes motion and special inclined plane to produce realizes the anchor of automatic inflation, realize the inflation with the help of the resistance of the soil body when taking out from again and remove, it promotes to strut the efficiency of construction to show under the prerequisite of guaranteeing the excavation supporting validity, and material cyclic utilization has been realized, the problem that current supporting technology is difficult to realize material turnover and high-efficient construction has effectively been solved.

The utility model adopts the following technical scheme: the scheme provides a safety supporting device for excavation foundation pits, which comprises a pit wall, supporting piles, expansion anchors and a connection plate, wherein the supporting piles are vertically arranged along the array distribution of the pit wall in a fixed mode, the expansion anchors penetrate through the side walls of the supporting piles in an array distribution mode from top to bottom, the length of the expansion anchors of the same side wall of the supporting piles is sequentially shortened from top to bottom, the connection plate penetrates through the side walls of the supporting piles in an array distribution mode from top to bottom, the two side walls of the connection plate are slidably connected with the adjacent side walls of the supporting piles in a sliding mode, each expansion anchor comprises a self-expansion anchor pipe and a locking anchor rod, the self-expansion anchor pipe penetrates through the side walls of the supporting piles in a sliding mode, the locking anchor rods penetrate through the inner wall of the self-expansion anchor pipe in a sliding mode, the self-expansion anchor pipe is used for drilling into the pit wall and forming anchor tie rods, the locking anchor rods provide power for drilling, and enable the self-expansion anchor pipes to generate expansion effects.

The self-expansion anchor pipe is characterized in that expansion rotating rods are rotatably distributed on the side wall of the end part, close to the pit wall, of the self-expansion anchor pipe in an annular array mode, a passive expansion inclined ring surface is arranged at the end part, far away from the self-expansion anchor pipe, of each expansion rotating rod, and permanent magnet strips are fixedly arranged on the side wall, close to the axis of the self-expansion anchor pipe, of each expansion rotating rod respectively.

Furthermore, the circumferential side wall array of the self-expansion anchor pipe is provided with auxiliary anchoring holes in a penetrating mode, the auxiliary anchoring holes are distributed in an annular array and a horizontal array by taking the axis of the self-expansion anchor pipe as a reference, and auxiliary anchoring sliding rods are arranged on the inner wall of each auxiliary anchoring hole in a sliding mode.

Furthermore, the end part of the self-expansion anchor pipe, which is far away from the pit wall, is fixedly provided with a recovery pull plate, and the side wall of the recovery pull plate is fixedly provided with a recovery pull nail.

Furthermore, a double-cone drill bit is fixedly arranged at the end part, close to the expansion rotating rod, of the locking anchor rod and is surrounded by the expansion rotating rod, and an active expansion inclined ring surface is arranged on the side wall of the double-cone drill bit.

Furthermore, the middle part of the circumferential side wall of the locking anchor rod is fixedly provided with auxiliary pushing circular truncated cone rings in an array distribution along the axis direction of the locking anchor rod, the diameter of the longitudinal section of each auxiliary pushing circular truncated cone ring gradually decreases from the position close to the double-cone drill bit to the position far away from the double-cone drill bit, and the array interval of the auxiliary pushing circular truncated cone rings is the same as the horizontal array interval of the auxiliary anchoring holes.

Further, the end fixing that the locking stock is close to the recovery arm-tie is equipped with anchor screw, anchor screw keeps away from the end fixing of locking stock and is equipped with the drilling board, anchor screw outer wall cover is equipped with the anchor nut, anchor nut inner wall and anchor screw outer wall meshing, the anchor nut is located the recovery arm-tie and is kept away from one side from the inflation anchor pipe.

Furthermore, the lateral wall of the supporting pile is symmetrically and fixedly provided with vertical clamping grooves, the contact plates are respectively clamped on the inner walls of the vertical clamping grooves in a sliding mode, and the locking anchor rod and the double-cone drill bit are made of magnetic metal materials.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) The expansion anchor anchors the equipment in a nested drilling mode, realizes automatic expansion anchoring by utilizing mutual movement and extrusion action generated by a special inclined plane, realizes expansion relief by virtue of resistance of a soil body during extraction, obviously improves the supporting construction efficiency on the premise of ensuring the effectiveness of foundation pit supporting, and realizes material recycling;

(2) The self-expansion anchor pipe enables the equipment to smoothly drill into the side wall of the foundation pit by using a magnetic gathering mode;

(3) The locking anchor rod moves on the inner wall of the self-expansion anchor pipe in a thread tightening mode, and expansion control of the self-expansion anchor pipe is realized by means of the gradual extrusion effect of the multiple groups of annular inclined planes;

(4) The supporting piles and the contact plates can be assembled and disassembled, pre-assembly can be carried out before supporting construction, supporting construction efficiency is improved, the supporting piles can be disassembled quickly after supporting use is finished, and efficient turnover is realized;

(5) The two-way toper design of bipyramid drill bit makes the inflation anchor can squeeze into the drilling fast, and locks the stock outwards movement and by the locking back, and bipyramid drill bit can extrude and block the inflation bull stick, makes the inflation state of inflation bull stick unable change to guaranteed the reliability of anchor, when retrieving, bipyramid drill bit can squeeze into certain distance to the foundation ditch lateral wall inside again smoothly, thereby removes the restriction to the inflation bull stick.

Drawings

Fig. 1 is a schematic structural view of a safety support device for an excavation foundation pit provided by the utility model;

fig. 2 is a schematic view of a combination structure of a support pile, an expansion anchor and a tie plate according to the present invention;

fig. 3 is a schematic structural view of the expansion anchor according to the present invention;

fig. 4 is a schematic structural view of the self-expanding anchor pipe according to the present invention;

FIG. 5 is a partial enlarged view of portion A of FIG. 4;

fig. 6 is a schematic structural view of the expansion rotating rod provided by the present invention;

fig. 7 is a cross-sectional side view of the inflatable anchor of the present invention in an initial state and an inflated state;

FIG. 8 is a partial enlarged view of portion B of FIG. 7;

fig. 9 is a schematic structural view of the locking anchor rod according to the present invention.

The anchor rod comprises a pit wall 1, a pit wall 2, a supporting pile 21, a vertical clamping groove 3, an expansion anchor 31, a self-expansion anchor pipe 311, an expansion rotating rod 3111, a passive expansion inclined ring surface 3112, a permanent magnet strip 312, an auxiliary anchoring hole 3121, an auxiliary anchoring sliding rod 313, a recovery pull plate 3131, a recovery pull nail 32, a locking anchor rod 321, a double-cone drill bit 3211, an active expansion inclined ring surface 322, an auxiliary pushing circular table ring 323, an anchoring screw rod 3231, a drilling plate 3232, an anchoring nut 4 and a connecting plate.

In fig. 7, (a) partially shows a side sectional view of the inflatable anchor in an initial state, and (b) partially shows a side sectional view of the inflatable anchor in an inflated state.

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example (b):

referring to fig. 1-3, the excavation foundation pit safety support device in this embodiment includes a pit wall 1, supporting piles 2, expansion anchors 3 and a connection plate 4, the supporting piles 2 are vertically arranged along the pit wall 1 in an array manner, the expansion anchors 3 are arranged on the side walls of the supporting piles 2 in an array manner from top to bottom, the lengths of the expansion anchors 3 on the side walls of the same supporting pile 2 are sequentially shortened from top to bottom, the connection plate 4 is arranged on the side walls of the supporting piles 2 in an array manner from top to bottom, the two side walls of the connection plate 4 are respectively clamped with the side walls of the adjacent supporting piles 2 in a sliding manner, each expansion anchor 3 includes a self-expansion anchor pipe 31 and a locking anchor rod 32, the self-expansion anchor pipe 31 is arranged on the side wall of the supporting pile 2 in a sliding manner, the locking anchor rod 32 is arranged on the inner wall of the self-expansion anchor pipe 31 in a sliding manner, the self-expansion anchor pipe 31 is used for drilling into the pit wall 1 and forming an anchor tie rod, the locking anchor rod 32 provides power for drilling, and the self-expansion anchor pipe 31 generates an expansion effect.

As shown in fig. 1-6, the expansion rotating rods 311 are rotatably distributed in an annular array on the side wall of the end portion of the self-expanding anchor pipe 31 close to the pit wall 1, the end portion of the expansion rotating rod 311 far from the self-expanding anchor pipe 31 is provided with a passive expansion inclined ring surface 3111, and the side walls of the expansion rotating rods 311 close to the axis of the self-expanding anchor pipe 31 are respectively and fixedly provided with permanent magnet strips 3112.

As shown in fig. 3-8, the self-expandable anchor pipe 31 has auxiliary anchoring holes 312 extending through the circumferential side wall array, the auxiliary anchoring holes 312 are distributed in circumferential and horizontal arrays with the axis of the self-expandable anchor pipe 31 as a reference, and the inner walls of the auxiliary anchoring holes 312 are respectively provided with auxiliary anchoring sliding rods 3121 in a sliding manner.

As shown in fig. 1-4, a recovery pulling plate 313 is fixedly arranged at the end of the self-expanding anchor pipe 31 far away from the pit wall 1, and a recovery pulling nail 3131 is fixedly arranged on the side wall of the recovery pulling plate 313.

As shown in fig. 3, 5 and 9, a double-cone drill bit 321 is fixedly arranged at the end of the locking anchor rod 32 close to the expansion rotating rod 311, the double-cone drill bit 321 is surrounded by the expansion rotating rod 311, and the side wall of the double-cone drill bit 321 is provided with a driving expansion inclined annular surface 3211.

As shown in fig. 3, 5 and 9, the middle portion of the circumferential sidewall of the locking anchor rod 32 is fixedly provided with auxiliary pushing circular truncated cone rings 322 in an array manner along the axial direction of the locking anchor rod 32, the diameter of the longitudinal section of each auxiliary pushing circular truncated cone ring 322 gradually decreases from the position close to the double-cone drill bit 321 to the position far away from the double-cone drill bit 321, and the array pitch of the auxiliary pushing circular truncated cone rings 322 is the same as the horizontal array pitch of the auxiliary anchoring holes 312.

As shown in fig. 3, 4 and 9, an anchor screw 323 is fixedly arranged at the end part of the locking anchor rod 32 close to the recovery pulling plate 313, a drilling plate 3231 is fixedly arranged at the end part of the anchor screw 323 far from the locking anchor rod 32, an anchor nut 3232 is sleeved on the outer wall of the anchor screw 323, the inner wall of the anchor nut 3232 is meshed with the outer wall of the anchor screw 323, and the anchor nut 3232 is arranged at one side of the recovery pulling plate 313 far from the self-expansion anchor pipe 31.

As shown in fig. 2, vertical slots 21 are symmetrically distributed and fixed on the side wall of the support pile 2, and the connection plates 4 are respectively slidably clamped on the inner walls of the vertical slots 21.

Further, the locking anchor 32 and the double-cone drill 321 are made of magnetically attracted metal.

The specific implementation manner of this embodiment is:

in the excavation process of the foundation pit, the excavation foundation pit safety supporting device provided by the scheme is arranged on the side wall of the foundation pit, the arrangement mode comprises two modes, the first mode is that the supporting pile 2 is driven in advance before excavation, the excavation depth gradually increases, the connecting plate 4 is continuously arranged in through the vertical clamping groove 21, after a reserved hole in the side wall of the supporting pile 2 appears, a drilling machine is adopted for drilling, the expansion anchor 3 is arranged and locked, the second mode is that the supporting pile 2 and the connecting plate 4 are assembled into a whole in advance, then the foundation pit is excavated, the supporting pile 2 and the connecting plate 4 are immediately attached to the pit wall 1 of the foundation pit after excavation, then the drilling and the installation of the expansion anchor 3 are carried out, and the second arrangement mode is taken as an example at present, and the specific implementation process is introduced.

In an initial state, the self-expansion anchor pipe 31 is closer to one end of the drilling plate 3231 of the locking anchor rod 32, at this time, the double-cone drill bit 321 is not surrounded by the expansion rotating rod 311, the double-cone drill bit 321 is in an outer leakage state, the expansion rotating rod 311 is respectively clung to the outer wall of the locking anchor rod 32 due to the magnetic attraction between the permanent magnet strips 3112 and the locking anchor rod 32, the expansion rotating rod 311 does not have an expansion effect at this time, after the assembled body of the support pile 2 and the connection plate 4 is clung to the pit wall 1, an operator adopts a drilling machine to drill holes through the reserved holes on the side wall of the support pile 2 until the requirement of the expansion anchor 3 is met, after the holes are formed, the expansion anchor 3 is driven into the drilled hole until the recovery pulling plate 313 touches the side wall of the support pile 2, the anchor nut 3232 is then tightened with a wrench and turned, and after the anchor nut 3232 is pressed against the recovery pull plate 313, under the engagement action of the anchor nut 3232 and the anchor screw 323, the anchor screw 323 gradually starts to slide outward with respect to the self-expanding anchor tube 31, and during the sliding of the anchor screw 323, the double cone drill bit 321 enters into the space between the expansion rotating rods 311, the expansion rotating rods 311 gradually rotate under the friction and extrusion action of the active expansion inclined ring surface 3211 and the passive expansion inclined ring surface 3111, and respectively open to the periphery of the double-cone drill bit 321, and the whole body shows an expansion effect, thereby forming an anchoring body in the foundation pit wall 1, in the process, the inclined surface of the auxiliary pushing circular truncated cone 322 gradually extrudes the auxiliary anchoring sliding rod 3121, so that the end of the auxiliary anchoring sliding rod 3121 protrudes from the outer wall of the expansion anchor pipe 31, thereby forming more protruding points in the middle of the self-expanding anchor pipe 31, enhancing the anchoring effect, completing the anchoring after the anchoring nut 3232 is screwed, and the installation of each expansion anchor 3 and the installation of the support piles 2 and the connection plates 4 are realized by analogy, so that the integral enclosure is formed.

Before backfilling the foundation pit, an operator can take out and recover the whole device in a hammering and pulling mode, the operator firstly uses a wrench to loosen the anchoring nut 3232 until the anchoring nut 3232 is close to the drilling plate 3231, then uses a hammering tool to hammer the drilling plate 3231 to enable the locking anchor rod 32 to penetrate into the foundation pit wall 1 for a certain distance, at the moment, the locking anchor rod 32 moves for a certain distance relative to the self-expansion anchor pipe 31, the relative position of the locking anchor rod 32 and the self-expansion anchor pipe 31 is restored to an initial state, at the moment, the active expansion inclined ring surface 3211 and the passive expansion inclined ring surface 3111 are not contacted any more, only a small amount of rock-soil body blocks are kept between the expansion rotating rod 311 and the locking anchor rod 32, the operator locks and recovers the pull nails 3131 through the pulling device and pulls the pull nails outwards, the expansion rotating rod 311 is blocked by the soil body in front of the movement due to the pulling action, so as to gather to the locking anchor rod 32, and finally shrinks to the initial state in the pulling process, in the process, the auxiliary anchor rods 3121 gradually leave the corresponding auxiliary jacking circular platform rings 322, the anchoring rods slide around the drill holes, and the anchor rods can be smoothly pulled out from the anchor rods 31, so as to pull out the anchor rods 3, and the anchor rods.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

The present invention and its embodiments have been described above, but the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims (8)

1. The utility model provides an excavation foundation ditch safety support device, includes pithead (1), fender pile (2) and contact plate (4), its characterized in that: prop up fender pile (2) and follow vertical setting of deciding of pot wall (1) array distribution, tie plate (4) top-down array distribution slides and locates fender pile (2) lateral wall, tie plate (4) both sides wall respectively with adjacent fender pile (2) lateral wall slip joint, prop up fender pile (2) lateral wall top-down array distribution and slide and run through and be equipped with inflation anchor (3), the length top-down of inflation anchor (3) of same fender pile (2) lateral wall shortens in proper order, inflation anchor (3) are including from inflation anchor pipe (31) and locking stock (32), from inflation anchor pipe (31) slide to run through and locate fender pile (2) lateral wall, locking stock (32) slide to run through and locate from inflation anchor pipe (31) inner wall.

2. The excavation pit safety support device of claim 1, wherein: the self-expanding anchor pipe (31) is provided with an expanding rotating rod (311) in an annular array distribution and rotation mode, wherein the side wall of the end portion, close to the pit wall (1), of the self-expanding anchor pipe (31), the end portion, far away from the self-expanding anchor pipe (31), of the expanding rotating rod (311) is provided with a passive expanding inclined ring surface (3111), and permanent magnet strips (3112) are fixedly arranged on the side wall, close to the axis of the self-expanding anchor pipe (31), of the expanding rotating rod (311) respectively.

3. The excavation pit safety support device of claim 2, wherein: the self-expanding anchor pipe (31) circumference lateral wall array runs through and is equipped with supplementary anchor hole (312), supplementary anchor hole (312) use the axis of self-expanding anchor pipe (31) as the basis hoop array and the horizontal array distribution setting, supplementary anchor hole (312) inner wall slides respectively and is equipped with supplementary anchor slide bar (3121).

4. The excavation pit safety support device of claim 3, wherein: the end part of the self-expansion anchor pipe (31) far away from the pit wall (1) is fixedly provided with a recovery pulling plate (313), and the side wall of the recovery pulling plate (313) is fixedly provided with a recovery pulling nail (3131).

5. The excavation pit safety support device of claim 4, wherein: the locking anchor rod (32) is fixedly provided with a double-cone drill bit (321) at the end part close to the expansion rotating rod (311), the double-cone drill bit (321) is surrounded by the expansion rotating rod (311), and the side wall of the double-cone drill bit (321) is provided with an active expansion inclined ring surface (3211).

6. The excavation pit safety support device of claim 5, wherein: the locking stock (32) circumference lateral wall middle part is fixed along locking stock (32) axis direction array distribution and is equipped with supplementary top of push circular platform ring (322), the longitudinal section diameter that supplementary top of push circular platform ring (322) diminishes from being close to bipyramid drill bit (321) to the direction of keeping away from bipyramid drill bit (321) gradually, the array interval that supplementary top of push circular platform ring (322) is the same with the horizontal array interval of supplementary anchor hole (312).

7. The excavation pit safety support device of claim 6, wherein: locking stock (32) are close to the end fixing who retrieves arm-tie (313) and are equipped with anchor screw (323), the end fixing that locking stock (32) were kept away from in anchor screw (323) is equipped with and drills into board (3231), anchor screw (323) outer wall cover is equipped with anchor nut (3232), anchor nut (3232) inner wall and anchor screw (323) outer wall meshing, one side of keeping away from self-expansion anchor pipe (31) is located retrieving arm-tie (313) in anchor nut (3232).

8. The excavation foundation pit safety support device according to claim 7, wherein: the supporting pile is characterized in that vertical clamping grooves (21) are symmetrically formed in the side wall of the supporting pile (2), the connecting plates (4) are respectively clamped on the inner wall of the vertical clamping grooves (21) in a sliding mode, and the locking anchor rod (32) and the double-cone drill bit (321) are made of magnetic metal materials.

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