CN114482076A - A foundation ditch enclosure equipment for bridge foundation construction - Google Patents

Abstract

The invention relates to the technical field of foundation pit support equipment, and discloses foundation pit support equipment for bridge foundation construction, which comprises a soil nail and a soil nail kit sleeved outside the soil nail, wherein the soil nail kit comprises a main sleeve and a positioning cylinder, the positioning cylinder is positioned at one end of the main sleeve, the positioning cylinder is in threaded connection with the main sleeve through threads, a plurality of movable separation blades are arranged in the positioning cylinder, fixing grooves with positions and numbers corresponding to the movable separation blades in a one-to-one mode are arranged on the positioning cylinder, and a connecting convex rib is arranged at one end, far away from the main sleeve, of the positioning cylinder. According to the invention, holes do not need to be punched in advance, the construction speed is effectively improved, the concrete can wrap the soil nails after the concrete is filled, the corrosion resistance effect is good, and the service lives of the soil nails are effectively prolonged.

Description

A foundation ditch enclosure equipment for bridge foundation construction

Technical Field

The invention relates to the technical field of foundation pit support equipment, in particular to foundation pit support equipment for bridge foundation construction.

Background

In the construction process of a bridge, the problem of excavation of a foundation pit is inevitably solved, and a foundation pit enclosure system is a measure for protecting the surrounding environment of the foundation pit, and supporting, reinforcing, protecting and controlling underground water adopted by the foundation pit. When excavating the earthwork in the situation that the field is wider, generally adopt the mode of putting the slope to keep the stability of side slope, want to further improve the stability of side slope, just need use the soil nail wall, the soil nail wall is a normal position soil body reinforcement technique: the foundation pit side slope is reinforced by soil nails made of steel bars, a steel bar net is laid on the surface of the side slope, then a concrete surface layer is sprayed, and after the concrete is solidified, the concrete is firmly bonded with the surrounding soil body to form a new complex, so that a supporting structure similar to a gravity retaining wall is formed on the slope.

In the work progress of soil nail wall, the first step is exactly to fix soil nail, according to the difference of fixed mode, soil nail roughly can divide into two kinds: the other is a drilling and grouting type, which is characterized in that mechanical equipment such as a drilling machine is firstly used for drilling holes in a soil body, a rod body is placed after the holes are formed, and then cement slurry is injected, so that the drilling and grouting type has the advantages of high pulling resistance and low manufacturing cost, and has the defects of low construction speed and large disturbance to in-situ soil; the other type is a grouting type, grouting holes are formed in the middle and the tail of the steel pipe, the steel pipe is directly driven into the soil during construction, then the mud is poured into the steel pipe under pressure to form the soil nail, the method has the advantages of high construction speed and small disturbance to in-situ soil, but the soil nail driven into the grouting type is not completely wrapped by the concrete after the construction is completed, so that the corrosion resistance is poor, and the service life is short.

Disclosure of Invention

The invention provides a foundation pit enclosure device for bridge foundation construction, which has the advantages of high construction speed and long service life, and solves the problems that the existing drilling grouting type soil nail in the background technology has long service life but low construction speed, and the grouting type soil nail is driven into the existing drilling grouting type soil nail, but has high construction speed but short service life.

The invention provides the following technical scheme: a foundation pit support device for bridge foundation construction comprises a soil nail and a soil nail suite sleeved outside the soil nail, wherein the soil nail suite comprises a main sleeve and a positioning cylinder, the positioning cylinder is positioned at one end of the main sleeve, the positioning cylinder is in threaded connection with the main sleeve through threads, a plurality of movable separation blades are arranged in the positioning cylinder, fixing grooves with positions and numbers corresponding to the movable separation blades in a one-to-one mode are formed in the positioning cylinder, and a connecting convex rib is arranged at one end, away from the main sleeve, of the positioning cylinder;

the one end of soil nail is equipped with the direction cap, the direction cap is close to the one end of soil nail is equipped with the baffle, just be equipped with on the baffle with the jack that the soil nail agrees with mutually, one side of jack is equipped with spacing notch, the tip of soil nail be equipped with spacing protruding muscle that spacing notch agrees with mutually, just spacing protruding muscle with perpendicular the setting of each other between the soil nail, one side of direction cap is equipped with first opening, just the opposite side of direction cap is equipped with the second opening, first open-ended one end is equipped with the guide way, just first open-ended inboard is equipped with two spacing claws, be equipped with the clearance of toper form between the spacing claw.

As an alternative of the foundation pit enclosure equipment for bridge foundation construction, the invention provides the following steps: the guide cap is of a hollow structure, a limiting block is arranged on the inner side of the guide cap, and the limiting block is connected with the guide cap in a rotating mode through a pin shaft.

The invention provides an alternative solution of a foundation pit support device for bridge foundation construction, wherein: the movable separation blade through the pivot with the location section of thick bamboo rotates to be connected, just the movable separation blade is close to the one end of fixed slot is equipped with the rubber gasket, the movable separation blade is kept away from the one end of rubber gasket is equipped with first spacing arch.

As an alternative of the foundation pit enclosure equipment for bridge foundation construction, the invention provides the following steps: be equipped with the stopper in the fixed slot, just the one end of stopper is equipped with a plurality of spurs.

As an alternative of the foundation pit enclosure equipment for bridge foundation construction, the invention provides the following steps: the soil nail is close to the one end of direction cap is equipped with the spacing ring, just the outside of spacing ring is equipped with the spacing separation blade of a plurality of.

As an alternative of the foundation pit enclosure equipment for bridge foundation construction, the invention provides the following steps: one side of the limiting ring close to the guide cap is provided with a plastic support sleeve which is sleeved on the soil nail, and when the positioning cylinder is abutted against the guide cap, the plastic support sleeve can be abutted against the movable separation blade and limit the movable separation blade.

As an alternative of the foundation pit enclosure equipment for bridge foundation construction, the invention provides the following steps: the baffle is kept away from the one end of direction cap is equipped with the spacing arch of second, just the spacing arch of second is the annular form, be equipped with a plurality of on the baffle and cross the thick liquid hole.

As an alternative of the foundation pit enclosure equipment for bridge foundation construction, the invention provides the following steps: the diameter of a location section of thick bamboo is less than the diameter of main sleeve, the one end of a location section of thick bamboo is equipped with first arch, just the other end of a location section of thick bamboo is equipped with the second arch, the bellied tip of second be equipped with the recess that the spacing arch of second agrees with mutually.

As an alternative of the foundation pit enclosure equipment for bridge foundation construction, the invention provides the following steps: one end of the main sleeve is provided with a sleeve cap which is sleeved on the main sleeve, and the outer side of the main sleeve is provided with an annular convex rib used for limiting the sleeve cap.

As an alternative of the foundation pit enclosure equipment for bridge foundation construction, the invention provides the following steps: the outer side of the main sleeve is provided with a limiting sleeve, and the limiting sleeve is provided with an adjusting bolt which is in threaded connection with the limiting sleeve.

The invention has the following beneficial effects:

1. the foundation pit support equipment for bridge foundation construction is characterized in that a soil nail suite is arranged on the outer side of a soil nail, the soil nail suite mainly comprises a main sleeve and a positioning cylinder, one end of the soil nail is provided with a guide cap, when in use, the soil nail suite is sleeved outside the soil nail, then the whole soil nail suite and the soil nail are driven into the soil body by adopting modes of manual hammering, hydraulic hammer or air hammer and the like, then the main sleeve is taken out, the soil nail, the guide cap and the positioning cylinder are left in the hole formed when the soil nail sleeve is driven in, after the main sleeve is taken out, the concrete is poured into the hole, after the concrete is solidified, the fixation of the soil nails is finished, thus in construction, no hole is needed to be punched in advance, the construction speed is effectively improved, and after concrete is filled, the concrete can wrap the soil nails, so that the corrosion resistance effect is good, and the service life of the soil nails is effectively prolonged.

2. This a foundation ditch enclosure equipment for bridge foundation construction, through set up the stopper in the direction cap, the direction cap is hollow structure, after soil nail and soil nail external member were squeezed into the soil body in, continue hammering soil nail, soil nail external member and direction cap are motionless this moment, and soil nail then continues the motion, when soil nail continued the motion, soil nail can contradict with the stopper, and promote the stopper motion, the stopper is eccentric settings, under the promotion of soil nail, the one end of stopper can be followed the second opening and stretched out, when the slip casting, the concrete thick liquid can pass the baffle and enter the direction cap, then flow from first opening and second opening, after the concrete is fixed, because the stopper stretches out from the second opening, just be equivalent to having set up a claw that has limiting displacement at the tip of direction cap, the resistance to plucking ability of direction cap and soil nail that can be great improvement.

3. According to the foundation pit enclosure equipment for bridge foundation construction, the movable baffle piece is arranged in the positioning cylinder, when the soil nail suite is taken out outwards, the movable baffle piece in the positioning cylinder can be abutted against the limiting baffle piece on the limiting ring, the rubber gasket is arranged at one end of the movable baffle piece, the end part of the movable baffle piece can be abutted against the fixed block along with the overturning of the movable baffle piece, the protruding spines are arranged on the fixed block, and the protruding spines can be inserted on the rubber gasket, so that the movable baffle piece can be fixed; after the main sleeve is taken out, one end of the soil nail is connected with the guide cap, and the positioning cylinder supports the soil nail at the middle part, so that after cement slurry is poured, the soil nail cannot be seriously eccentric, and the concrete can be ensured to completely wrap the soil nail so as to improve the corrosion resistance of the concrete.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Fig. 3 is a schematic view of the structure of the soil nail of the present invention.

Fig. 4 is a schematic structural view of the positioning cylinder of the present invention.

Fig. 5 is a schematic view of the internal structure of the positioning cylinder of the present invention.

Fig. 6 is an enlarged view of the structure at a in fig. 1 according to the present invention.

Fig. 7 is a schematic view of the structure of the guide cap of the present invention.

Fig. 8 is a schematic view of the internal structure of the guide cap of the present invention.

In the figure: 1. a soil nail kit; 101. a main sleeve; 102. a positioning cylinder; 1021. a movable baffle plate; 1022. fixing grooves; 1023. connecting the convex ribs; 1024. a rubber gasket; 1025. a first limit protrusion; 1026. a fixed block; 1027. bur protruding; 1028. a first protrusion; 1029. a second protrusion; 103. a sleeve cap; 2. soil nailing; 201. limiting convex ribs; 202. a limiting ring; 203. a limiting baffle plate; 204. a plastic support sleeve; 3. a guide cap; 301. a baffle plate; 302. a jack; 303. a limiting notch; 304. a first opening; 305. a second opening; 306. a guide groove; 307. a limiting claw; 308. a limiting block; 309. a second limit bulge; 4. slurry passing holes; 5. a groove; 6. an annular convex rib; 7. a limiting sleeve; 8. and adjusting the bolt.

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 a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1 to 8, the invention provides a foundation pit support device for bridge foundation construction, which comprises a soil nail 2 and a soil nail suite 1 sleeved outside the soil nail 2, wherein the soil nail suite 1 comprises a main sleeve 101 and a positioning cylinder 102, the positioning cylinder 102 is positioned at one end of the main sleeve 101, the positioning cylinder 102 is in threaded connection with the main sleeve 101 through threads, a plurality of movable blocking pieces 1021 are arranged in the positioning cylinder 102, fixing grooves 1022 with positions and numbers corresponding to the movable blocking pieces 1021 in a one-to-one manner are arranged on the positioning cylinder 102, and a connecting convex rib 1023 is arranged at one end of the positioning cylinder 102 far away from the main sleeve 101;

one end of soil nail 2 is equipped with direction cap 3, the one end that direction cap 3 is close to soil nail 2 is equipped with baffle 301, and be equipped with the jack 302 that agrees with soil nail 2 mutually on the baffle 301, one side of jack 302 is equipped with spacing notch 303, the tip of soil nail 2 is equipped with spacing protruding muscle 201 that agrees with mutually with spacing notch 303, and perpendicular setting mutually between spacing protruding muscle 201 and the soil nail 2, one side of direction cap 3 is equipped with first opening 304, and the opposite side of direction cap 3 is equipped with second opening 305, the one end of first opening 304 is equipped with guide way 306, and the inboard of first opening 304 is equipped with two spacing claws 307, be equipped with the clearance of toper form between the spacing claw 307.

In order to improve the construction speed, the technical scheme is that a soil nail suite 1 is arranged on the outer side of a soil nail 2, the soil nail suite 1 mainly comprises a main sleeve 101 and a positioning cylinder 102, a guide cap 3 is arranged at one end of the soil nail 2, when the soil nail suite 1 is used, the soil nail suite 1 is sleeved on the outer side of the soil nail 2, then the whole soil nail suite 1 and the soil nail 2 are driven into a soil body by adopting modes of manual hammering, a hydraulic hammer or a pneumatic hammer and the like, then force is continuously applied to the soil nail 2, the guide cap 3 is separated from the soil nail suite 1, then the main sleeve 101 in the soil nail suite 1 is taken out, in the taking-out process, the positioning cylinder 102 is limited by a limiting baffle 203 on the soil nail 2, so that the positioning cylinder 102 can keep in a hole formed when the soil nail suite 1 is driven in, the positioning cylinder 102 can form a support for the soil nail 2, so that the soil nail 2 can not be seriously eccentric when grouting, after the main sleeve 101 is taken out, the concrete is poured into the hole, after the concrete is solidified, the fixing of the soil nail 2 is completed, so that the hole punching in advance is not needed during construction, the construction speed is effectively improved, and after the concrete is poured, the concrete can wrap the soil nail 2, so that the corrosion resistance effect is good, and the service life of the soil nail is effectively prolonged.

Specifically, adorn guide cap 3 earlier on soil nail 2, one end at soil nail 2 is equipped with spacing protruding muscle 201, then be equipped with baffle 301 on guide cap 3, be equipped with on baffle 301 with the jack 302 that agrees with soil nail 2 mutually and with the spacing notch 303 that agrees with mutually of spacing protruding muscle 201, during the installation, aim at spacing protruding muscle 201 on the soil nail 2 with spacing notch 303 on baffle 301, treat that the tip of soil nail 2 inserts to guide cap 3 after, rotate soil nail 2, as long as spacing protruding muscle 201 and spacing notch 303 on the soil nail 2 are in staggered state, so soil nail 2 just can't be followed and is extracted from guide cap 3.

Be equipped with first opening 304 on direction cap 3, the inboard of first opening 304 is equipped with two spacing claws 307, be equipped with connection convex rib 1023 in the one end of a location section of thick bamboo 102, a location section of thick bamboo 102 has the installation direction, connect the existence of convex rib 1023, on the one hand the installation direction of a location section of thick bamboo 102 is discerned in the convenient installation, on the other hand a location section of thick bamboo 102 is connected with direction cap 3 through connecting convex rib 1023, during the installation, peg graft the one end of connecting convex rib 1023 between the clearance of two spacing claws 307, connect convex rib 1023 and be the toper form, be equivalent to a wedge, and then constitute a wedge groove that is used for carrying out the fixing to connecting convex rib 1023 jointly between two spacing claws 307.

Example 2

The embodiment is explained based on embodiment 1, specifically, please refer to fig. 2 and 8, the guide cap 3 is a hollow structure, a limiting block 308 is disposed on the inner side of the guide cap 3, and the limiting block 308 is rotatably connected to the guide cap 3 through a pin.

The guide cap 3 is a hollow structure, a movable limiting block 308 is arranged in the guide cap 3, under normal conditions, the limiting block 308 is obliquely arranged in the guide cap 3, when the soil nail 2 and the soil nail suite 1 are driven into the soil body, the soil nail 2 is hammered continuously, at the moment, the soil nail suite 1 and the guide cap 3 are not moved, the soil nail 2 continues to move, when the soil nail 2 continues to move, the soil nail 2 will collide with the limiting block 308 and push the limiting block 308 to move, the limiting block 308 is eccentrically arranged, under the push of the soil nail 2, one end of the limiting block 308 is abutted against the connecting convex rib 1023, under the push of the limiting block 308, the connecting convex rib 1023 can be separated from the limiting claw 307, so that the subsequent separation of the positioning cylinder 102 and the guide cap 3 can be conveniently completed, and finally the limiting stopper 308 can be abutted against the limiting claw 307 at the first opening 304 and stop moving, that is, the limiting claw 307 also has the function of limiting the limiting stopper 308.

The other end of the limiting block 308 extends out of the second opening 305, during grouting, concrete grout can pass through the baffle 301 and enter the guide cap 3, and then flows out of the first opening 304 and the second opening 305, after concrete is fixed, because the limiting block 308 extends out of the second opening 305, a claw with a limiting effect is arranged at the end of the guide cap 3, and the anti-pulling capacity of the guide cap 3 and the soil nail 2 can be greatly improved.

Example 3

The present embodiment is explained based on embodiment 1, and specifically, referring to fig. 4 and fig. 5, a movable blocking piece 1021 is rotatably connected with the positioning cylinder 102 through a rotating shaft, and one end of the movable blocking piece 1021 near the fixing groove 1022 is provided with a rubber gasket 1024, and one end of the movable blocking piece 1021 far from the rubber gasket 1024 is provided with a first limiting protrusion 1025. A fixing block 1026 is disposed in the fixing groove 1022, and a plurality of protrusions 1027 are disposed at one end of the fixing block 1026.

One end of the soil nail 2 close to the guide cap 3 is provided with a limiting ring 202, and the outer side of the limiting ring 202 is provided with a plurality of limiting blocking pieces 203.

A movable baffle plate 1021 is arranged in the positioning barrel 102, when the soil nail sleeve member 1 is taken out outwards, the movable baffle plate 1021 in the positioning barrel 102 can abut against a limiting baffle plate 203 on a limiting ring 202, the limiting ring 202 is fixedly connected with the soil nail 2, the rotation angle of the movable baffle plate 1021 is 0-90 degrees, under the abutting of the limiting baffle plate 203, the movable baffle plate 1021 deflects, a rubber gasket 1024 is arranged at one end of the movable baffle plate 1021, along with the overturning of the movable baffle plate 1021, the end part of the movable baffle plate 1021 can abut against a fixed block 1026, a bur 1027 is arranged on the fixed block 1026, and the bur 1027 can be inserted into the rubber gasket 1024, so that the movable baffle plate 1021 can be fixed; when using, the mounted position of spacing ring 202 can be adjusted as required, and after main sleeve 101 took out, the one end and the direction cap 3 of soil nail 2 were connected, and location section of thick bamboo 102 then supported soil nail 2 in the position at middle part, like this behind the cement thick liquid of pouring, serious off-centre can not take place for soil nail 2, can guarantee that the concrete can be complete wrap up soil nail 2 to improve its corrosion resistance.

Example 4

In this embodiment, the explanation is made on the basis of embodiment 1, specifically, referring to fig. 1 to fig. 3, a plastic support sleeve 204 is disposed on one side of the limit ring 202 close to the guide cap 3, the plastic support sleeve 204 is sleeved on the soil nail 2, and when the positioning cylinder 102 is abutted against the guide cap 3, the plastic support sleeve 204 will abut against the movable blocking piece 1021 to limit the position of the movable blocking piece 1021.

Under normal conditions, the movable blocking piece 1021 is in an approximately vertical state with the axis of the positioning cylinder 102 under the influence of the gravity of the movable blocking piece 1021, so that one end of the movable blocking piece 1021 extends out of the fixing groove 1022, and after the end of the movable blocking piece 1021 extends out of the fixing groove 1022, the movable blocking piece 1021 can collide with the soil body in the process of driving the soil nail suite 1 into the soil body, so that the difficulty of driving the soil nail suite 1 into the soil body is increased.

Example 5

The present embodiment is explained based on embodiment 1, specifically, referring to fig. 1 and fig. 7, one end of the baffle 301 away from the guide cap 3 is provided with a second limiting protrusion 309, the second limiting protrusion 309 is in a ring shape, and the baffle 301 is provided with a plurality of slurry passing holes 4.

Be equipped with the spacing arch 309 of second on baffle 301, when fixing guide cap 3 and a location section of thick bamboo 102, the spacing arch 309 of second can insert to the recess 5 of a location section of thick bamboo 102 tip, can effectual increase the stability of being connected between a location section of thick bamboo 102 and the guide cap 3, be equipped with thick liquid hole 4 on baffle 301, when pouring cement thick liquid, the inboard that grout hole 4 got into guide cap 3 is crossed to the grout accessible, treat the concrete setting back, soil nail 2 and guide cap 3 can be inseparable fixed together.

Example 6

The present embodiment is explained based on embodiment 1, specifically, referring to fig. 4 and fig. 5, a diameter of the positioning cylinder 102 is smaller than a diameter of the main sleeve 101, a first protrusion 1028 is disposed at one end of the positioning cylinder 102, a second protrusion 1029 is disposed at the other end of the positioning cylinder 102, and a groove 5 engaged with the second limiting protrusion 309 is disposed at an end of the second protrusion 1029.

The diameter of the first protrusion 1028 and the diameter of the second protrusion are the same as the diameter of the main sleeve, the end of the second protrusion 1029 is provided with a groove 5 matched with the second limiting protrusion 309, when the positioning cylinder 102 is fixed, one end of the connecting convex rib 1023 penetrates through the guide groove 306 and then is inserted between the two limiting claws 307, and meanwhile, the second limiting protrusion 309 is also inserted into the groove 5, so that the positioning cylinder has better stability.

Example 7

The present embodiment is explained based on embodiment 1, and specifically, referring to fig. 1 and fig. 2, a sleeve cap 103 is disposed at one end of a main sleeve 101, the sleeve cap 103 is sleeved on the main sleeve 101, and an annular rib 6 for limiting the sleeve cap 103 is disposed on the outer side of the main sleeve 101. The outside of main sleeve 101 is equipped with stop collar 7, and is equipped with adjusting bolt 8 on the stop collar 7, and adjusting bolt 8 passes through the screw thread and 7 spiro union of stop collar.

In order to more conveniently drive the soil nail sleeve member 1 into the soil body, a sleeve cap 103 is further arranged at one end of the main sleeve 101, when the soil nail sleeve member is used, the sleeve cap 103 is sleeved on the main sleeve 101, then force is applied to the sleeve cap 103, after the soil nail sleeve member 1 and the soil nail 2 are driven into the soil body, the sleeve cap 103 is taken down, then the soil nail 2 is continuously knocked, the soil nail 2 is abutted to the limiting block 308, the limiting block 308 is further enabled to overturn, then the main sleeve 101 and the positioning cylinder 102 are pulled outwards, at the moment, the soil nail 2 and the guide cap 3 are not moved, when the soil nail sleeve member moves to a certain position, the positioning cylinder 102 can be blocked by the limiting blocking piece 203 on the soil nail 2, at the moment, the main sleeve 101 is rotated, and the positioning cylinder 102 can rotate along with the main sleeve 101.

The first limiting bulge 1025 is arranged on the movable blocking piece 1021, the first limiting bulge 1025 can be clamped between gaps of the limiting blocking pieces 203, when the movable blocking pieces 1021 are abutted to the limiting blocking pieces 203, one ends of the movable blocking pieces 1021 can also extend out of the fixing grooves 1022 and abut against soil, limitation can also be formed on the positioning barrel 102, when the positioning barrel 102 is limited, the positioning barrel 102 is fixed, the main sleeve 101 continues to rotate, and because the main sleeve 101 is in threaded connection with the positioning barrel 102, the main sleeve 101 can be separated from the positioning barrel 102.

Stop collar 7 can be at the in-process that soil nail external member 1 was squeezed into, play a spacing effect to soil nail external member 1, the existence of stop collar 7, the degree of depth of squeezing into of confirmation soil nail external member 1 that can make the operator can be convenient, when needs adjust stop collar 7, only need earlier loosen adjusting bolt 8, then remove stop collar 7, adjust the completion back, screw up adjusting bolt 8, adjusting bolt 8's one end can pass stop collar 7 and contradict with main sleeve 101, thereby fix stop collar 7.

It should be noted that, in this document, relational terms such as first and second, and the like are 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. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The utility model provides a foundation ditch enclosure equipment for bridge foundation construction, establishes soil nail external member (1) in soil nail (2) outside including soil nail (2) and cover, its characterized in that: the soil nail kit (1) comprises a main sleeve (101) and a positioning barrel (102), wherein the positioning barrel (102) is positioned at one end of the main sleeve (101), the positioning barrel (102) is in threaded connection with the main sleeve (101) through threads, a plurality of movable blocking pieces (1021) are arranged in the positioning barrel (102), fixing grooves (1022) with positions and numbers corresponding to the movable blocking pieces (1021) in a one-to-one mode are formed in the positioning barrel (102), and a connecting convex rib (1023) is arranged at one end, far away from the main sleeve (101), of the positioning barrel (102);

one end of the soil nail (2) is provided with a guide cap (3), one end of the guide cap (3) close to the soil nail (2) is provided with a baffle plate (301), and the baffle (301) is provided with a jack (302) matched with the soil nail (2), one side of the jack (302) is provided with a limiting notch (303), the end part of the soil nail (2) is provided with a limiting convex rib (201) matched with the limiting notch (303), the limiting convex ribs (201) and the soil nails (2) are arranged vertically, one side of the guide cap (3) is provided with a first opening (304), and the other side of the guide cap (3) is provided with a second opening (305), one end of the first opening (304) is provided with a guide groove (306), and the inner side of the first opening (304) is provided with two limiting claws (307), and a conical gap is arranged between the limiting claws (307).

2. The foundation pit support equipment for bridge foundation construction of claim 1, wherein: the guide cap (3) is of a hollow structure, a limiting block (308) is arranged on the inner side of the guide cap (3), and the limiting block (308) is rotatably connected with the guide cap (3) through a pin shaft.

3. The foundation pit support equipment for bridge foundation construction of claim 1, wherein: the movable blocking piece (1021) is rotatably connected with the positioning barrel (102) through a rotating shaft, a rubber gasket (1024) is arranged at one end, close to the fixing groove (1022), of the movable blocking piece (1021), and a first limiting bulge (1025) is arranged at one end, far away from the rubber gasket (1024), of the movable blocking piece (1021).

4. A foundation pit support apparatus for use in bridge foundation construction according to claim 3, wherein: a fixing block (1026) is arranged in the fixing groove (1022), and one end of the fixing block (1026) is provided with a plurality of spurs (1027).

5. The foundation pit support equipment for bridge foundation construction of claim 1, wherein: the soil nail (2) is close to one end of the guide cap (3) and is provided with a limiting ring (202), and the outer side of the limiting ring (202) is provided with a plurality of limiting blocking pieces (203).

6. The foundation pit support equipment for bridge foundation construction according to claim 5, wherein: one side of the limiting ring (202) close to the guide cap (3) is provided with a plastic support sleeve (204), the plastic support sleeve (204) is sleeved on the soil nail (2), and when the positioning cylinder (102) is abutted against the guide cap (3), the plastic support sleeve (204) can abut against the movable retaining sheet (1021) and limit the movable retaining sheet.

7. The foundation pit support equipment for bridge foundation construction of claim 1, wherein: the baffle (301) is kept away from the one end of leading cap (3) is equipped with spacing arch of second (309), just spacing arch of second (309) is the annular form, be equipped with a plurality of on baffle (301) and cross thick liquid hole (4).

8. The foundation pit support apparatus for bridge foundation construction of claim 7, wherein: the diameter of the positioning cylinder (102) is smaller than that of the main sleeve (101), a first protrusion (1028) is arranged at one end of the positioning cylinder (102), a second protrusion (1029) is arranged at the other end of the positioning cylinder (102), and a groove (5) matched with the second limiting protrusion (309) is formed in the end portion of the second protrusion (1029).

9. The foundation pit support equipment for bridge foundation construction of claim 1, wherein: one end of the main sleeve (101) is provided with a sleeve cap (103), the sleeve cap (103) is sleeved on the main sleeve (101), and the outer side of the main sleeve (101) is provided with an annular convex rib (6) used for limiting the sleeve cap (103).

10. The foundation pit support equipment for bridge foundation construction of claim 1, wherein: the outer side of the main sleeve (101) is provided with a limiting sleeve (7), an adjusting bolt (8) is arranged on the limiting sleeve (7), and the adjusting bolt (8) is in threaded connection with the limiting sleeve (7).

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