Pile beam underpinning pile foundation engineering reinforcing device and construction method thereof

Abstract

The present application relates to the technical field of building construction, in particular to a pile beam underpinning pile foundation engineering reinforcing device and its construction method, comprising a claw system, the claw system is arranged at the bottom of the pile beam, the bottom of the pile beam is provided with a pile column, a lower support structure is installed on the pile column, an inclined support steel pole is arranged between the claw system and the lower support structure, the claw system comprises a claw and a claw connecting block; the beneficial effect is that: the pile beam underpinning pile foundation engineering reinforcing device and its construction method proposed in the present application are connected between the pile beam and the pile column through the cooperation of the lower support structure and the claw system and the inclined support steel pole, and an elastic pad set and a nut blocking piece are additionally installed on the surface of the inclined support steel pole, so that the bolts for installing the inclined support steel pole are prevented from loosening; the problem of poor reinforcing effect of the existing pile foundation underpinning reinforcing device is solved; the reinforcing measures adopted have little disturbance to the pile foundation, improve the bearing capacity of the pile foundation, and effectively reduce the settlement of the subsequent upper structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a pile beam underpinning pile foundation engineering reinforcing device and a construction method thereof. BACKGROUND

[0002] Under the background of rapid economic development, in order to solve the contradiction of unbalanced regional development in China, a large number of infrastructure construction has been started in recent years in China. There are still many engineering structural problems in the existing large number of buildings, and improper selection and treatment of the foundation will affect the appearance and use function of the building, and even make the building become a dangerous house. Therefore, it is urgent to reinforce and maintain the building with uneven settlement and to underpin and reinforce the foundation accordingly.

[0003] In the prior art, the traditional pile beam underpinning method is to press piles or new cast-in-place piles on the side of the foundation that needs to be underpinned, and to set an underpinning beam under the original foundation to connect the underpinning pile and the original foundation. With the passage of time, the upper building or structure produces a large settlement, which may lead to cracking of the building and other adverse consequences, causing personnel casualties and economic losses. Therefore, after the pile-beam underpinning reinforcement method is carried out, it should be reinforced.

[0004] However, through the pile beam underpinning reinforcement measure, the bearing capacity of the pile foundation can be increased while the damage of the building caused by uneven settlement can be reduced. The reinforcement utilizes the three-way compression of the concrete column by the cross brace steel hoop to improve the bearing capacity of the concrete, and the components are connected by bolts, which is convenient for on-site construction. SUMMARY

[0005] The present application aims to provide a pile beam underpinning pile foundation engineering reinforcing device and a construction method thereof to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a pile beam underpinning pile foundation engineering reinforcing device, comprising a claw system, the claw system is arranged at the bottom of the pile beam, the bottom of the pile beam is provided with a pile column, the pile column is installed with a lower support structure, a diagonal support steel rod is arranged between the claw system and the lower support structure, the claw system comprises a claw and a claw connecting block, the top of the claw is provided with a supporting damping piece, the surface of the claw connecting block is provided with an elastic pad group and a nut blocking piece.

[0007] Preferably, the claw connecting block is provided with two groups, the surface of the claw connecting block is provided with bolt through holes, the claw is provided with two groups, the two groups of claws are fixed on the surface of the claw connecting block, and the two groups of claws are arranged in an "eight" shape.

[0008] Preferably, the inclined supporting steel rod comprises a steel rod, an upper positioning bolt and a lower positioning bolt, the upper positioning bolt is locked after penetrating the top end of the steel rod and the upper positioning bolt hole.

[0009] Preferably, the lower supporting structure comprises a lower positioning bolt hole, a lower sleeve, a triangular plate, a steel hoop connecting block, a cross support connecting bolt, a cross support left steel hoop and a cross support right steel hoop, the lower positioning bolt hole is arranged on the surface of the lower sleeve, the lower sleeve is fixed on the surface of the steel hoop connecting block, the steel hoop connecting block is fixed on the surface of the cross support right steel hoop, and the bottom surface of the steel hoop connecting block is fixed with the triangular plate, the triangular plate is fixed on the surface of the cross support right steel hoop, the cross support left steel hoop and the cross support right steel hoop are symmetrically distributed about the pile, and the cross support left steel hoop and the cross support right steel hoop are connected and fixed by the cross support connecting bolt, and the lower positioning bolt is locked after penetrating the bottom end of the steel rod and the lower positioning bolt hole.

[0010] Preferably, a reinforcing support is arranged between the claw and the claw connecting block, and a fixing piece is arranged at the end of the claw.

[0011] Preferably, the reinforcing support comprises reinforcing rib plates and a connecting horizontal plate, the reinforcing rib plates are provided with two groups, the two groups of reinforcing rib plates are respectively fixed on the bottom surfaces of the two claws, the connecting horizontal plate is fixed between the two groups of reinforcing rib plates, the connecting horizontal plate is provided with a plurality of connecting horizontal plates, the lengths of the plurality of connecting horizontal plates are adapted to the spacing of the two groups of reinforcing rib plates, a reserved hole is arranged on the surface of the fixing piece, and the reserved hole is fixed at one end of the claw.

[0012] Preferably, the supporting damping member comprises a mounting groove, a rubber pad strip one, an elastic metal supporting strip and a rubber pad strip two, the mounting groove is arranged on the top surface of the claw, the rubber pad strip one is in a "Fang" shaped plate structure, the rubber pad strip one is fixed on the bottom surface of the mounting groove, the height of the rubber pad strip one is greater than the depth of the mounting groove, the elastic metal supporting strip is in a "U" shaped plate structure, the elastic metal supporting strip is fixed between the groove top surface of the rubber pad strip one and the bottom surface of the mounting groove, and the rubber pad strip two is in a "T" shaped plate structure, and the rubber pad strip two is fixed between the top plate bottom surface of the rubber pad strip one and the bottom surface of the mounting groove.

[0013] Preferably, the elastic pad set comprises a receiving groove, a rubber ring, a pressing ring, a side groove, a limiting strip and a rubber sheet, the receiving groove is an annular groove, two groups of receiving grooves are symmetrically distributed about the claw connecting block, the rubber ring is fixed on the surface of the receiving groove, one end of the rubber ring is fixed on the surface of the pressing ring, the pressing ring is an annular structure with an inner ring opening in the shape of a "convex" slot, the side groove is arranged on the outer ring surface of the pressing ring, a plurality of side grooves are arranged, and the limiting strip and the side groove are one-to-one corresponding, the limiting strip is slidingly connected in the side groove, the limiting strip is fixed on the outer ring surface of the receiving groove, the rubber sheet is in the shape of a "cross", a plurality of rubber sheets are arranged, the plurality of rubber sheets are all fixed on the surface of the claw connecting block, and the plurality of rubber sheets are arranged around the bolt reserved opening.

[0014] Preferably, the nut blocking piece comprises a mounting sheet, a perforation, a blocking sheet, a traction sheet, an elastic metal strip, a clamping strip and a pull ring, the mounting sheet is fixed on the surface of the claw connecting block, two groups of perforations are arranged on the surface of the mounting sheet, the blocking sheet and the perforation are one-to-one corresponding, the blocking sheet is movably inserted in the perforation, the two groups of blocking sheets are all fixed on the bottom surface of the traction sheet, the traction sheet is in the shape of a "convex" plate structure, the elastic metal strip is fixed on the surface of the traction sheet, the clamping strip is fixed on the surface of the elastic metal strip, the clamping strip is in the shape of a straight-angle trapezoidal strip structure, the inclined surface of the clamping strip faces downward, and the pull ring is fixed on the surface of the elastic metal strip, the pull ring and the clamping strip are symmetrically distributed about the elastic metal strip.

[0015] A construction method of the pile foundation engineering reinforcement device for pile beam underpinning, the construction method comprises the following steps:

[0016] The left steel hoop of the cross brace is placed on the left side of the pile, the right steel hoop of the cross brace is placed on the right side of the pile, the left steel hoop of the cross brace is connected with the right steel hoop of the cross brace by using the cross brace connecting bolt, the cross brace connecting bolt is tightened, and the concrete pile is in three-way compression;

[0017] The left side surface of the steel hoop connecting block is welded to the right wall side surface of the right steel hoop of the cross brace, the top of the triangular plate is welded to the bottom of the steel hoop connecting block, the left side surface of the triangular plate is welded to the right wall side surface of the right steel hoop of the cross brace, and the bottom of the lower sleeve is welded to the right wall side surface of the steel hoop connecting block.

[0018] The steel rod is connected with the two lower positioning bolt holes of the lower sleeve through the two lower positioning bolts.

[0019] The two claws are welded to one side of the claw connecting block, and the top of the upper sleeve is welded to the bottom of the claw connecting block.

[0020] The two claw connecting blocks are connected through the stable bolt.

[0021] The claw system is connected with the steel rod through the two upper positioning bolts.

[0022] Compared with the prior art, the pile foundation engineering reinforcement device for pile beam underpinning has the following beneficial effects:

[0023] The pile beam underpinning pile foundation engineering reinforcing device and the construction method thereof have the advantages that the lower support structure and the claw system are connected between the pile beam and the pile column through the inclined support steel pole, the elastic pad set and the nut blocking piece are additionally installed on the surface of the claw connecting block, the bolts on the surface of the claw connecting block are prevented from loosening, the problem of poor reinforcing effect of the existing pile foundation underpinning reinforcing device is solved, the reinforcing measures are small in disturbance to the pile foundation, the bearing capacity of the pile foundation is improved, and the settlement of the subsequent upper structure is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present application;

[0025] Figure 2 It is a structural schematic diagram of the claw system of the present application;

[0026] Figure 3 It is a structural schematic diagram of the inclined support steel pole of the present application;

[0027] Figure 4 It is a structural schematic diagram of the lower support structure of the present application;

[0028] Figure 5 It is a connecting structure schematic diagram of the claw and the claw connecting block of the present application;

[0029] Figure 6 It is a mounting structure schematic diagram of the elastic pad set of the present application;

[0030] Figure 7 It is a bottom view of the connecting structure schematic diagram of the claw and the claw connecting block of the present application;

[0031] Figure 8 It is a half-section view of the connecting structure schematic diagram of the claw and the claw connecting block of the present application;

[0032] Figure 9 It is Figure 8 It is an enlarged schematic diagram of structure A of the present application;

[0033] Figure 10 It is a structural schematic diagram of the reinforcing support piece of the present application;

[0034] Figure 11 It is an enlarged schematic diagram of structure B of the present application;

[0035] Figure 12 It is a connecting structure schematic diagram of the blocking piece and the traction piece of the present application.

[0036] Figure: the claw system 1, the claw 11, the claw connecting block 12, the stable bolt 13, the upper sleeve 14, the upper positioning bolt hole 15, the inclined support steel pole 2, the steel pole 21, the upper positioning bolt 22, the lower positioning bolt 23, the lower support structure 3, the lower positioning bolt hole 31, the lower sleeve 32, the triangular plate 33, the steel hoop connecting block 34, the cross support connecting bolt 35, the cross support left steel hoop 36, the cross support right steel hoop 37, the reinforcing support 4, the reinforcing rib plate 41, the connecting cross plate 42, the bearing damping element 5, the installation groove 51, the rubber pad strip one 52, the elastic metal support strip 53, the rubber pad strip two 54, the fixed sheet 6, the reserved hole 61, the elastic pad group 7, the storage groove 71, the rubber ring 72, the pressure ring 73, the edge groove 74, the limiting strip 75, the rubber sheet 76, the nut blocking piece 8, the installation sheet 81, the perforation 82, the blocking sheet 83, the traction sheet 84, the elastic metal strip 85, the clamping strip 86, the pull ring 87. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme of the present application clear, complete description, and the advantages are more clear and obvious, the following will be combined with the drawings to further describe the embodiments of the present application. It should be understood that the specific embodiments described here are part of the embodiments of the present application, not all embodiments, only to explain the embodiments of the present application, and not for the purpose of limiting the embodiments of the present application, all other embodiments obtained by the person skilled in the art without doing creative work, belong to the scope of protection of the present application.

[0038] Embodiment one

[0039] Please refer to Figures 1 to 3The pile beam underpinning pile foundation engineering reinforcing device, which belongs to the technical field of pile foundation engineering, comprises a claw system 1, which is arranged at the bottom of a pile beam, wherein the bottom of the pile beam is provided with a pile column, and a lower support structure 3 is arranged on the pile column, an inclined support steel rod 2 is arranged between the claw system 1 and the lower support structure 3, the claw system 1 comprises claws 11 and claw connecting blocks 12, a supporting damping part 5 is arranged at the top of the claw 11, elastic pad groups 7 and nut blocking parts 8 are arranged on the surface of the claw connecting block 12, the claw connecting block 12 is provided with two groups, bolt through holes are formed in the surface of the claw connecting block 12, the claws 11 are provided with two groups, the two groups of claws 11 are fixed on the surface of the claw connecting block 12, and the two groups of claws 11 are arranged in an “eight” shape, the claw system 1 further comprises stable bolts 13, an upper sleeve 14 and an upper positioning bolt hole 15, the stable bolts 13 pass through the bolt through holes in the surfaces of the two groups of claw connecting blocks 12, the upper sleeve 14 is fixed at the top end of the inclined support steel rod 2, the upper positioning bolt hole 15 is formed in the surface of the upper sleeve 14, and the upper sleeve 14 is in a circular arc plate structure; the inclined support steel rod 2 comprises a steel rod 21, an upper positioning bolt 22 and a lower positioning bolt 23, and the upper positioning bolt 22 passes through the top end of the steel rod 21 and is locked after passing through the upper positioning bolt hole 15.

[0040] Embodiment two

[0041] With reference to the drawings Figure 4 On the basis of embodiment one, in order to realize the installation of the lower support structure 3, the lower support structure 3 comprises a lower positioning bolt hole 31, a lower sleeve 32, a triangular plate 33, a steel hoop connecting block 34, a cross support connecting bolt 35, a cross support left steel hoop 36 and a cross support right steel hoop 37, the lower positioning bolt hole 31 is formed in the surface of the lower sleeve 32, the lower sleeve 32 is fixed on the surface of the steel hoop connecting block 34, the steel hoop connecting block 34 is fixed on the surface of the cross support right steel hoop 37, the bottom surface of the steel hoop connecting block 34 is fixed with the triangular plate 33, the triangular plate 33 is fixed on the surface of the cross support right steel hoop 37, the cross support left steel hoop 36 and the cross support right steel hoop 37 are symmetrically distributed about the pile column, the cross support left steel hoop 36 and the cross support right steel hoop 37 are connected and fixed through the cross support connecting bolt 35, and the lower positioning bolt 23 passes through the bottom end of the steel rod 21 and is locked after passing through the lower positioning bolt hole 31.

[0042] Embodiment three

[0043] With reference to the drawings Figures 5 to 8 And Figure 10On the basis of embodiment two, in order to realize the assembly of the claw 11 and the claw connecting block 12, the reinforcing support 4 is arranged between the claw 11 and the claw connecting block 12, the end of the claw 11 is provided with the fixing sheet 6, the reinforcing support 4 comprises the reinforcing rib plate 41 and the connecting horizontal plate 42, the reinforcing rib plate 41 is provided with two groups, the two groups of reinforcing rib plates 41 are respectively fixed on the bottom surfaces of the two claws 11, the connecting horizontal plate 42 is fixed between the two groups of reinforcing rib plates 41, the connecting horizontal plate 42 is provided with multiple, the lengths of the multiple connecting horizontal plates 42 are adapted to the spacing of the two groups of reinforcing rib plates 41, the surface of the fixing sheet 6 is provided with the reserved hole 61, and the reserved hole 61 is fixed at one end of the claw 11; the supporting damping part 5 comprises the installation groove 51, the rubber pad strip one 52, the elastic metal supporting strip 53 and the rubber pad strip two 54, the installation groove 51 is arranged on the top surface of the claw 11, the rubber pad strip one 52 is in a “” character-shaped plate structure, the rubber pad strip one 52 is fixed on the bottom surface of the installation groove 51, the height of the rubber pad strip one 52 is greater than the depth of the installation groove 51, the elastic metal supporting strip 53 is in a “U” character-shaped plate structure, the elastic metal supporting strip 53 is fixed between the groove top surface of the rubber pad strip one 52 and the bottom surface of the installation groove 51, and the rubber pad strip two 54 is in a “T” character-shaped plate structure, the rubber pad strip two 54 is fixed between the top plate bottom surface of the rubber pad strip one 52 and the bottom surface of the installation groove 51.

[0044] Embodiment four

[0045] Refer to the attached drawings Figure 9 , Figure 11 and Figure 12On the basis of embodiment three, in order to realize the anti-falling fastening of the two groups of claw connecting blocks 12, the elastic pad group 7 comprises a receiving groove 71, a rubber ring 72, a pressing ring 73, an edge groove 74, a limiting strip 75 and a rubber sheet 76, the receiving groove 71 is an annular groove, two groups of receiving grooves 71 are symmetrically distributed about the claw connecting block 12, the rubber ring 72 is fixed on the surface of the receiving groove 71, one end of the rubber ring 72 is fixed on the surface of the pressing ring 73, the pressing ring 73 is an annular structure with an inner ring opening in the shape of a "convex" character, the edge groove 74 is arranged on the outer ring surface of the pressing ring 73, the edge groove 74 is provided with a plurality of limiting strips 75 and edge grooves 74, the limiting strip 75 is slidably connected in the edge groove 74, the limiting strip 75 is fixed on the outer ring surface of the receiving groove 71, the rubber sheet 76 is in the shape of a "cross", the rubber sheet 76 is provided with a plurality of rubber sheets 76, and the plurality of rubber sheets 76 are fixed on the surface of the claw connecting block 12, and the plurality of rubber sheets 76 are arranged around the bolt reserved opening; the nut blocking piece 8 comprises a mounting sheet 81, a perforation 82, a blocking sheet 83, a traction sheet 84, an elastic metal strip 85, a clamping strip 86 and a pull ring 87, the mounting sheet 81 is fixed on the surface of the claw connecting block 12, two groups of perforations 82 are arranged on the surface of the mounting sheet 81, the blocking sheet 83 and the perforation 82 are one-to-one corresponding, the blocking sheet 83 is movably inserted in the perforation 82, the two groups of blocking sheets 83 are fixed on the bottom surface of the traction sheet 84, the traction sheet 84 is in the shape of a "convex" plate structure, the elastic metal strip 85 is fixed on the surface of the traction sheet 84, the clamping strip 86 is fixed on the surface of the elastic metal strip 85, the clamping strip 86 is in the shape of a straight angle trapezoidal strip structure, the inclined surface of the clamping strip 86 faces downward, and the pull ring 87 is fixed on the surface of the elastic metal strip 85, the pull ring 87 and the clamping strip 86 are symmetrically distributed about the elastic metal strip 85.

[0046] A construction method of a pile foundation engineering reinforcement device for pile beam underpinning, the construction method comprising the following steps:

[0047] Place the left steel hoop of the cross brace on the left side of the pile, place the right steel hoop of the cross brace on the right side of the pile, connect the left steel hoop of the cross brace with the right steel hoop of the cross brace using the cross brace connecting bolt, tighten the cross brace connecting bolt, and make the concrete pile bear three-way pressure;

[0048] Weld the left side of the steel hoop connecting block to the right wall side of the right steel hoop of the cross brace; weld the top of the triangular plate to the bottom of the steel hoop connecting block; weld the left side of the triangular plate to the right wall side of the right steel hoop of the cross brace; weld the bottom of the lower sleeve to the right wall side of the steel hoop connecting block;

[0049] The steel rod is connected with the two lower positioning bolt holes of the lower sleeve through two lower positioning bolts;

[0050] Weld two claws on one side of the claw connecting block; weld the top of the upper sleeve to the bottom of the claw connecting block;

[0051] The two claw connecting blocks are connected through the stabilizing bolt;

[0052] The dog system is connected to the steel pole by two upper positioning bolts.

[0053] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since the scope of the application will be defined with respect to the appended claims and equivalents thereof, which can include other applications that are within the spirit and scope of the application.

Claims

1. A pile beam underpinning pile foundation engineering reinforcement device, comprising a claw system (1), the claw system (1) is arranged at the bottom of the pile beam, the bottom of the pile beam is provided with a pile column, and a lower support structure (3) is installed on the pile column, characterized in that: An inclined support steel rod (2) is provided between the jaw system (1) and the lower support structure (3). The jaw system (1) includes jaws (11) and jaw connection blocks (12). A supporting damping member (5) is provided at the top of the jaws (11). An elastic pad group (7) and a nut blocking member (8) are provided on the surface of the jaw connection blocks (12); there are two sets of jaw connection blocks (12), bolt through-holes are formed on the surfaces of the jaw connection blocks (12), there are two sets of jaws (11), and the two sets of jaws (11) are both fixed on the surface of the jaw connection blocks (12), and the two sets of jaws (11) are arranged in a "V" shape. The jaw system (1) further includes a stabilizing bolt (13), an upper sleeve (14), and an upper positioning bolt hole (15). The stabilizing bolt (13) passes through the bolt through-holes on the surfaces of the two sets of jaw connection blocks (12). The upper sleeve (14) is fixed at the top end of the inclined support steel rod (2). The upper positioning bolt hole (15) is formed on the surface of the upper sleeve (14). The upper sleeve (14) is in the shape of an arc-shaped plate structure; the elastic pad group (7) includes a receiving groove (71), a rubber ring (72), a pressing ring (73), a side groove (74), a limiting strip (75), and a rubber sheet (76). The receiving groove (71) is an annular groove. There are two sets of receiving grooves (71), and the two sets of receiving grooves (71) are symmetrically distributed with respect to the jaw connection block (12). The rubber ring (72) is fixed on the surface of the receiving groove (71). One end of the rubber ring (72) is fixed on the surface of the pressing ring (73). The pressing ring (73) is in the shape of a ring with an inner ring opening being a "convex" shaped groove. The side groove (74) is formed on the outer ring surface of the pressing ring (73). There are multiple side grooves (74), and the limiting strips (75) correspond to the side grooves (74) one by one. The limiting strips (75) are slidably connected in the side grooves (74). The limiting strips (75) are fixed on the outer ring surface of the receiving groove (71). The rubber sheets (76) are in the shape of a "cross" sheet. There are multiple rubber sheets (76), and the multiple rubber sheets (76) are all fixed on the surface of the jaw connection block (12), and the multiple rubber sheets (76) are arranged around the bolt reserved hole; the nut blocking member (8) includes a mounting plate (81), a through-hole (82), a blocking piece (83), a traction piece (84), an elastic metal strip (85), a clamping strip (86), and a pull ring (87). The mounting plate (81) is fixed on the surface of the jaw connection block (12). Two sets of through-holes (82) are formed on the surface of the mounting plate (81). The blocking pieces (83) correspond to the through-holes (82) one by one. The blocking pieces (83) are movably inserted into the through-holes (82). The two sets of blocking pieces (83) are both fixed on the bottom surface of the traction piece (84). The traction piece (84) is in the shape of a "convex" shaped plate. The elastic metal strip (85) is fixed on the surface of the traction piece (84). The clamping strip (86) is fixed on the surface of the elastic metal strip (85). The clamping strip (86) is in the shape of a right trapezoidal strip. The inclined surface of the clamping strip (86) faces downward. The pull ring (87) is fixed on the surface of the elastic metal strip (85). The pull ring (87) and the clamping strip (86) are symmetrically distributed with respect to the elastic metal strip (85).

2. The pile-beam underpinning pile foundation engineering reinforcement device according to claim 1, characterized in that: The diagonal support steel rod (2) includes a steel rod (21), an upper positioning bolt (22), and a lower positioning bolt (23). The upper positioning bolt (22) passes through the top end of the steel rod (21) and the upper positioning bolt hole (15) and is then locked.

3. The pile-beam underpinning pile foundation engineering reinforcement device according to claim 2, characterized in that: The lower support structure (3) includes a lower positioning bolt hole (31), a lower sleeve (32), a triangular plate (33), a steel hoop connecting block (34), a cross brace connecting bolt (35), a left cross brace steel hoop (36), and a right cross brace steel hoop (37). The lower positioning bolt hole (31) is opened on the surface of the lower sleeve (32). The lower sleeve (32) is fixed on the surface of the steel hoop connecting block (34). The steel hoop connecting block (34) is fixed on the surface of the right cross brace steel hoop (37). And a triangular plate (33) is fixed to the bottom surface of the steel hoop connecting block (34). The triangular plate (33) is fixed on the surface of the right cross brace steel hoop (37). The left cross brace steel hoop (36) and the right cross brace steel hoop (37) are symmetrically distributed about the pile column. And the left cross brace steel hoop (36) and the right cross brace steel hoop (37) are connected and fixed by the cross brace connecting bolt (35). The lower positioning bolt (23) passes through the bottom end of the steel rod (21) and the lower positioning bolt hole (31) and is then locked.

4. The pile-beam underpinning pile foundation engineering reinforcement device according to claim 1, characterized in that: A reinforcing brace (4) is provided between the claw (11) and the claw connecting block (12). A fixing piece (6) is installed at the end of the claw (11).

5. The pile-beam underpinning pile foundation engineering reinforcement device according to claim 4, characterized in that: The reinforcing brace (4) includes reinforcing rib plates (41) and connecting cross plates (42). There are two groups of reinforcing rib plates (41). The two groups of reinforcing rib plates (41) are respectively fixed to the bottom surfaces of the two claws (11). The connecting cross plates (42) are fixed between the two groups of reinforcing rib plates (41). There are multiple connecting cross plates (42). The lengths of the multiple connecting cross plates (42) are adapted to the spacing between the two groups of reinforcing rib plates (41). A reserved hole (61) is opened on the surface of the fixing piece (6). The reserved hole (61) is fixed at one end of the claw (11).

6. The pile-beam underpinning pile foundation engineering reinforcement device according to claim 1, characterized in that: The supporting damping member (5) includes an installation groove (51), a first rubber gasket strip (52), an elastic metal supporting strip (53), and a second rubber gasket strip (54). The installation groove (51) is opened on the top surface of the claw (11). The first rubber gasket strip (52) is in a "C" - shaped plate structure. The first rubber gasket strip (52) is fixed to the bottom surface of the installation groove (51). The height of the first rubber gasket strip (52) is greater than the depth of the installation groove (51). The elastic metal supporting strip (53) is in a "U" - shaped plate structure. The elastic metal supporting strip (53) is fixed between the top surface of the groove body of the first rubber gasket strip (52) and the bottom surface of the installation groove (51). The second rubber gasket strip (54) is in a "T" - shaped plate structure. The second rubber gasket strip (54) is fixed between the bottom surface of the top plate of the first rubber gasket strip (52) and the bottom surface of the installation groove (51).

7. A construction method of a pile foundation engineering reinforcement device for pile beam underpinning according to claim 3, characterized in that, This construction method includes the following steps: Place the left cross brace steel hoop on the left side of the pile, place the right cross brace steel hoop on the right side of the pile, use the cross brace connecting bolt to connect the left cross brace steel hoop and the right cross brace steel hoop, and tighten the cross brace connecting bolt to make the concrete pile under triaxial compression; Weld the left side of the steel hoop connecting block to the right wall side of the right steel hoop of the cross brace; weld the top of the triangular plate to the bottom of the steel hoop connecting block; weld the left side of the triangular plate to the right wall side of the right steel hoop of the cross brace; weld the bottom of the lower sleeve to the right wall side of the steel hoop connecting block; The steel rod is connected with the two lower positioning bolt holes of the lower sleeve through two lower positioning bolts; Weld the two clamping jaws to one side of the clamping jaw connecting block; weld the top of the upper sleeve to the bottom of the clamping jaw connecting block; The two clamping jaw connecting blocks are connected through a stabilizing bolt; The clamping jaw system is connected with the steel rod through two upper positioning bolts.

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