CN217231840U

CN217231840U - Supporting structure for deep foundation pit supporting engineering

Info

Publication number: CN217231840U
Application number: CN202123125673.4U
Authority: CN
Inventors: 陈树林; 金国强; 张亚明
Original assignee: Wuhan Licheng Geotechnical Co ltd
Current assignee: Wuhan Licheng Geotechnical Co ltd
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2022-08-19
Anticipated expiration: 2031-12-13

Abstract

The utility model belongs to the technical field of excavation supporting and relates to a supporting construction for deep excavation supporting engineering and specifically relates to a supporting construction is related to, it includes two crossbeams, a plurality of longerons and a plurality of steel sheet pile that set up in two relative lateral walls departments of foundation ditch, with the equal fixedly connected with supporting shoe of a plurality of steel sheet piles of one side, the crossbeam be located a plurality of supporting shoes and with supporting shoe releasable connection, the both ends of longeron be located respectively on two crossbeams and all with the steel sheet pile butt, the tip cover of longeron is equipped with the apron, the apron just makes the longeron be located between apron and the crossbeam with crossbeam releasable connection. This application has the effect of being convenient for ann tear longeron and crossbeam open, and the recycle crossbeam and longeron of being convenient for do benefit to the make full use of resource, energy-concerving and environment-protective.

Description

Supporting structure for deep foundation pit supporting engineering

Technical Field

The application relates to the field of foundation pit support, in particular to a supporting structure for deep foundation pit support engineering.

Background

In order to facilitate an operator to enter the deep foundation pit for operation, a supporting and protecting structure is required to be arranged in the foundation pit, and the foundation pit supporting is a retaining, reinforcing and protecting measure adopted for the side wall of the foundation pit and the surrounding environment in order to ensure the safety of the construction of an underground structure and the surrounding environment of the foundation pit.

The steel sheet pile is a common supporting structure in deep foundation pit supporting engineering, the steel sheet pile is a section steel with a locking notch, the section of the steel sheet pile has a straight plate shape, a groove shape, a Z shape and the like, after the steel sheet pile is driven into a hard soil layer along the side wall of a foundation pit, cross beams are welded and fixed on two rows of opposite steel plates along the horizontal direction, and then a plurality of longitudinal beams are welded and fixed between two opposite cross beams at equal intervals so as to realize the supporting effect on the foundation pit.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: crossbeam welded fastening is on the steel sheet, and longeron welded fastening is between two crossbeams, and crossbeam and longeron just can be taken off through the cutting in later stage, are difficult to carry out recycle to crossbeam and longeron, easily cause the wasting of resources.

SUMMERY OF THE UTILITY MODEL

In order to improve the problem that the crossbeam and longeron are dismantled to ann not convenient to, this application provides a supporting construction for deep basal pit supporting engineering.

The application provides a supporting construction for deep basal pit supporting engineering adopts following technical scheme:

a supporting construction for deep basal pit supporting engineering, include two crossbeams, a plurality of longerons and a plurality of steel sheet pile that sets up in two relative lateral walls departments of foundation ditch, it is a plurality of with the equal fixedly connected with supporting shoe of steel sheet pile, the crossbeam is located a plurality of on the supporting shoe and with supporting shoe releasable connection, the both ends of longeron are located two respectively on the crossbeam and all with the steel sheet pile butt, the tip cover of longeron is equipped with the apron, the apron with crossbeam releasable connection just makes the longeron is located the apron with between the crossbeam.

Through adopting above-mentioned technical scheme, place the crossbeam on a plurality of supporting shoes, utilize a plurality of supporting shoes bearing crossbeam of being convenient for, the crossbeam of being convenient for and a plurality of supporting shoes are fixed, place the longeron on two crossbeams, make the both ends of longeron respectively with the steel sheet pile butt of the both sides department that the foundation ditch is relative, locate the week side of longeron and make apron and crossbeam fixed with the apron cover after that, utilize a plurality of longerons to make the steel sheet pile firm ground support foundation ditch lateral wall, take off the apron and can take out the longeron, can pull down the crossbeam after that, do benefit to recycle crossbeam and longeron promptly, make full use of resources, energy-concerving and environment-protective.

Optionally, the supporting block is provided with a positioning groove in a vertical direction in a penetrating manner, the beam is fixedly connected with a plurality of positioning blocks, the plurality of positioning blocks correspond to the plurality of positioning grooves one to one, and the positioning blocks are matched with the positioning grooves in a sliding manner along a direction towards the steel sheet pile.

Through adopting above-mentioned technical scheme, remove the crossbeam to a plurality of supporting shoes on, and make a plurality of locating pieces peg graft respectively in a plurality of constant head tanks, follow the direction removal crossbeam towards the steel sheet pile after that for the crossbeam remove to with the steel sheet pile butt, utilize the locating piece to peg graft and be convenient for fix a position the crossbeam in the constant head tank, and do benefit to and prevent that the crossbeam from removing along its length direction.

Optionally, the steel sheet pile is fixedly connected with a plurality of locking blocks at one side of the cross beam departing from the supporting block, and the locking blocks are provided with locking pieces for fixing the cross beam.

Through adopting above-mentioned technical scheme, when the crossbeam remove along the supporting shoe to with the steel sheet pile butt, the crossbeam is located between supporting shoe and the locking piece, utilizes the locking piece to be convenient for prevent that the crossbeam from removing along vertical direction, utilizes the locking piece to make crossbeam and locking piece fixed, can make crossbeam and supporting shoe fixed.

Optionally, the locking piece includes a first bolt, and the first bolt is inserted in the locking block and is connected with the cross beam through threads.

Through adopting above-mentioned technical scheme, when the crossbeam remove to between supporting shoe and the locking piece and with the steel sheet pile butt, twist first bolt and move to wearing to locate the locking piece and with crossbeam threaded connection, can make crossbeam and locking piece fixed.

Optionally, a plurality of limiting grooves are formed in one opposite side of each of the two cross beams, the limiting grooves face the steel sheet piles and are arranged in a penetrating mode, one side, deviating from the supporting block, of each limiting groove is arranged in an opening mode, the limiting grooves in the two cross beams correspond to one another in a one-to-one mode, and two opposite ends of each longitudinal beam are respectively inserted into the corresponding two limiting grooves and are matched with the limiting grooves in an inserting mode.

Through adopting above-mentioned technical scheme, during the installation longeron, place the longeron in two spacing inslots that correspond along vertical direction, the both ends of longeron do benefit to the longeron location with two steel sheet pile butts respectively with the spacing groove, prevent that the longeron from swinging along the horizontal direction at will on the crossbeam, the follow-up fixed longeron of being convenient for.

Optionally, the apron orientation the steel sheet pile runs through and has seted up the arc wall, the arc wall orientation one side of crossbeam sets up for the opening, week side of longeron with the cell wall butt of arc wall, the equal fixedly connected with otic placode in the relative both sides of apron, the otic placode pass through the second bolt with crossbeam fixed connection.

Through adopting above-mentioned technical scheme, establish the apron cover with the week side of longeron for the week side of longeron is pegged graft in the arc wall, utilizes the second bolt to fix otic placode and crossbeam, makes the tip of longeron be fixed in between apron and the crossbeam, can make longeron and crossbeam fixed, takes off the apron and can dismantle the longeron.

Optionally, a plurality of sliding grooves are formed in the position, close to the limiting groove, of one side, away from the supporting block, of the cross beam, the opening of each sliding groove is gradually reduced along the direction away from the cross beam, the sliding grooves penetrate through the cross beam along the direction towards the steel sheet pile, a plurality of sliding blocks are fixedly connected to the cover plate, and the sliding blocks correspond to the sliding grooves in a one-to-one mode and are matched with the sliding grooves in a sliding mode.

Through adopting above-mentioned technical scheme, will lap the cover and establish all sides with the longeron, and follow the horizontal direction and slide the apron towards the crossbeam for two sliders on the apron slide respectively in two spouts, the opening of spout reduces along the direction that deviates from the crossbeam gradually, do benefit to and prevent that the apron from breaking away from the crossbeam along vertical direction, thereby do benefit to the tip of longeron and be fixed in between apron and the crossbeam steadily.

Optionally, the foundation ditch diapire is in every the below department of longeron all is provided with a supporting beam, a supporting beam's top is provided with the bearing post, the bearing post runs through to be offered and is used for the bearing groove of the middle department of longeron.

Through adopting above-mentioned technical scheme, rotate the support post for two spacing grooves that support the groove and correspond are aimed at, move the longeron to two spacing grooves and the bearing inslot that correspond along vertical direction, when the longeron is fixed with the crossbeam, the longeron is stably located the support inslot, thereby is favorable to a supporting beam to support the centre department of longeron firmly, does benefit to the anti deformability that improves the longeron.

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

1. the cross beam is convenient to mount and dismount between the supporting block and the locking block, the longitudinal beam is convenient to mount and dismount on the cross beam by utilizing the cover plate, and the longitudinal beam and the cross beam are convenient to dismount subsequently, so that the cross beam and the longitudinal beam are convenient to recycle, resources are favorably utilized fully, and the energy-saving and environment-friendly effects are achieved;

2. the positioning block is inserted into the positioning groove to position the cross beam conveniently, the cross beam and the locking block are fixed conveniently by the first bolt, and the cross beam can slide away from the lower part of the locking block along the horizontal direction by taking down the first bolt, so that the cross beam can be detached;

3. the opening that utilizes the spout reduces gradually, slider and spout adaptation that slides along the direction that deviates from the crossbeam, prevents that the apron from breaking away from the crossbeam along vertical direction, utilizes the second bolt to make otic placode and crossbeam fixed, can make the tip of longeron be fixed in between apron and the crossbeam steadily, takes out the second bolt, slides the slider from the spout along the horizontal direction, can be with apron and crossbeam separation, can pull down the longeron.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Fig. 3 is a sectional view taken along line B-B in fig. 1.

Fig. 4 is an enlarged view at C in fig. 3.

Fig. 5 is a sectional view taken along line D-D in fig. 1.

Reference numerals: 1. steel sheet piles; 2. a cross beam; 3. a stringer; 4. a support block; 5. a locking block; 6. a cover plate; 7. positioning a groove; 8. positioning blocks; 9. a first bolt; 10. a locking hole; 11. a limiting groove; 12. an arc-shaped slot; 13. an ear plate; 14. a second bolt; 15. a chute; 16. a slider; 17. a support beam; 18. a base; 19. an anchor rod; 20. a fixed block; 21. a support post; 22. connecting columns; 23. a ring strip; 24. connecting grooves; 25. a ring groove; 26. a support groove.

Detailed Description

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

The embodiment of the application discloses a supporting construction for deep foundation pit supporting engineering.

Referring to fig. 1, the supporting structure for deep foundation pit supporting engineering comprises two rectangular cross beams 2, a plurality of cylindrical longitudinal beams 3 and a plurality of steel sheet piles 1 arranged on two opposite side walls of a foundation pit, wherein the plurality of steel sheet piles 1 are inserted and fixed in the foundation pit along the side wall of the foundation pit. With the equal fixedly connected with rectangular supporting shoe 4 of a plurality of steel sheet pile 1 of one side, the last side of a plurality of supporting shoes 4 all is located same horizontal plane, crossbeam 2 is located a plurality of supporting shoes 4 and with 4 releasable connection of supporting shoe.

Referring to fig. 1, steel sheet pile 1 is in crossbeam 2 and deviates from a plurality of locking blocks 5 of one side department fixedly connected with of supporting shoe 4, a plurality of locking blocks 5 and a plurality of supporting shoes 4 one-to-one and with crossbeam 2's side butt that goes up, locking block 5 is provided with the locking piece that is used for fixed beam 2. The both ends of longeron 3 are located respectively on two crossbeams 2 and all with 1 butt of steel sheet pile, a plurality of longerons 3 are parallel to each other, and the week side cover of the tip of longeron 3 is equipped with apron 6,

apron

6 and 2 releasable connection of crossbeam and make longeron 3 be located between apron 6 and the crossbeam 2.

The cross beam 2 is placed on the plurality of support blocks 4 so that opposite sides of the cross beam 2 are respectively abutted against the support blocks 4 and the locking blocks 5, and then the cross beam 2 and the locking blocks 5 are fixed by the locking members. Utilize a plurality of supporting shoes 4 to be convenient for bearing crossbeam 2, utilize a plurality of locking pieces 5 to be convenient for prevent crossbeam 2 along vertical direction swing at will to do benefit to crossbeam 2 and be fixed in between supporting shoe 4 and the locking piece 5 firmly.

Place longeron 3 on two crossbeams 2 for the both ends of longeron 3 respectively with the steel sheet pile 1 butt of the relative both sides department of foundation ditch, the length direction of longeron 3 and the length direction quadrature of crossbeam 2 set up this moment, and then establish the apron 6 cover in the week side of longeron 3 and make apron 6 and crossbeam 2 fixed.

On two crossbeams 2 are fixed in at the both ends of longeron 3, utilize a plurality of longerons 3 of two crossbeams 2 bearing, utilize a plurality of longerons 3 to make steel sheet pile 1 strut the foundation ditch lateral wall firmly, take off apron 6 and can take out longeron 3, remove the locking piece and to crossbeam 2 fixed, can take out crossbeam 2, the effect of crossbeam 2 and longeron 3 is torn open in the realization ann of being convenient for, do benefit to recycle crossbeam 2 and longeron 3 promptly, make full use of resource, energy-concerving and environment-protective.

Refer to fig. 2, for the convenience of ann tears crossbeam 2 open, supporting shoe 4 runs through along vertical direction and has seted up constant head tank 7, crossbeam 2 is towards a plurality of locating pieces 8 of one side fixedly connected with of supporting shoe 4, locating piece 8 is located crossbeam 2 and is close to the one end of steel sheet pile 1, a plurality of locating pieces 8 and a plurality of constant head tank 7 one-to-one, and locating piece 8 slides the adaptation along the direction and constant head tank 7 of orientation steel sheet pile 1, constant head tank 7 extends to the outside of the vertical projection of locking block 5 along the direction that deviates from steel sheet pile 1.

Referring to fig. 2, the locking piece includes first bolt 9, and locking block 5 runs through along vertical direction and sets up the locking hole 10 with the screw thread end adaptation of first bolt 9, and crossbeam 2 is equipped with a plurality of first screw holes along its length direction interval, and first bolt 9 is worn to locate locking hole 10 and is located first screw hole and crossbeam 2 threaded connection along vertical direction.

Move crossbeam 2 on a plurality of supporting shoes 4 along vertical direction, and make a plurality of locating pieces 8 peg graft respectively in a plurality of constant head tanks 7, then along the direction removal crossbeam 2 towards steel sheet pile 1, locating piece 8 slides along constant head tank 7 for crossbeam 2 moves between supporting shoe 4 and the locking piece 5 and with steel sheet pile 1 butt, a plurality of locking holes 10 align with a plurality of first screw respectively this moment.

Wear to locate locking hole 10 and twist first screw with first bolt 9, can prevent that crossbeam 2 from leaving between supporting shoe 4 and the locking piece 5, utilize locating piece 8 to peg graft in constant head tank 7 and be convenient for fix a position crossbeam 2, the locking hole 10 of being convenient for aligns with first screw, and do benefit to and prevent that crossbeam 2 from removing along its length direction, realize the effect of the fixed cross beam 2 of being convenient for, take off first bolt 9 and can follow the below that the horizontal direction slided crossbeam 2 from locking piece 5, can pull down crossbeam 2.

Referring to fig. 3 and 4, for the convenience of ann tearing down longeron 3, a plurality of spacing grooves 11 have all been seted up to two crossbeams 2 one side in opposite directions, and spacing groove 11 runs through the setting towards steel sheet pile 1, and one side that spacing groove 11 deviates from supporting shoe 4 is the opening setting, a plurality of spacing grooves 11 one-to-one on two crossbeams 2, and the both ends that longeron 3 is relative are pegged graft respectively in two spacing grooves 11 that correspond each other and with the 11 adaptations of pegging graft of spacing groove.

Referring to fig. 4, apron 6 runs through towards steel sheet pile 1 and has seted up arc wall 12, one side of arc wall 12 towards crossbeam 2 is the opening setting, the week side of longeron 3 lies in the outside part of spacing groove 11 and the cell wall butt of arc wall 12 and pegs graft the adaptation with arc wall 12, the equal fixedly connected with otic placode 13 in both sides that apron 6 is relative, two otic placodes 13 are located the both sides of spacing groove 11 respectively, otic placode 13 passes through second bolt 14 and crossbeam 2 fixed connection, second bolt 14 wears to locate

otic placode

13 and 2 threaded connection with the crossbeam.

Referring to fig. 4, crossbeam 2 deviates from one side of supporting shoe 4 and has seted up a plurality of spouts 15 in being close to spacing groove 11 department, spout 15 runs through in crossbeam 2 along the direction of perpendicular to steel sheet pile 1, spout 15's opening reduces along the direction that deviates from crossbeam 2 gradually, spout 15 sets up to two and sets up to the T shape in this embodiment, two spouts 15 are located the both sides of spacing groove 11 respectively, apron 6 is towards the slider 16 of two T shapes of one side fixedly connected with of crossbeam 2, two sliders 16 and the adaptation that just slides of two spout 15 one-to-ones.

When installing longeron 3, place longeron 3 in two spacing grooves 11 that correspond along vertical direction, the both ends of longeron 3 do not utilize spacing groove 11 to do benefit to 3 location to longeron with 1 butt of two steel sheet piles, prevent longeron 3 along the random swing of horizontal direction on crossbeam 2, the follow-up fixed longeron 3 of being convenient for. Then, the cover plate 6 is covered on the peripheral side of the longitudinal beam 3, so that the peripheral side of the longitudinal beam 3 is inserted into the arc-shaped groove 12, and then the cover plate 6 is slid towards the cross beam 2 along the horizontal direction, so that the two slide blocks 16 on the cover plate 6 slide into the two slide grooves 15 respectively.

When the side butt on otic placode 13 and crossbeam 2, utilize second bolt 14 to fix otic placode 13 and crossbeam 2, can prevent that apron 6 from continuing to remove along the horizontal direction, utilize the slider 16 of T shape and the spout 15 adaptation that slides of T shape, do benefit to and prevent apron 6 from breaking away from crossbeam 2 along vertical direction to make the tip of longeron 3 be fixed in between apron 6 and crossbeam 2 steadily. The second bolt 14 is taken out, the sliding block 16 is slid away from the sliding groove 15 along the horizontal direction, the cover plate 6 and the cross beam 2 can be separated, and the longitudinal beam 3 can be detached.

Referring to fig. 5, in order to make longeron 3 support steel sheet pile 1 more firmly, the foundation ditch diapire all is provided with a columniform supporting beam 17 in the below department of every longeron 3, supporting beam 17's axial sets up along vertical direction, the circular shape base 18 of the lower extreme fixedly connected with of supporting beam 17, base 18 is fixed with the diapire of foundation ditch through four stock 19, four stock 19 along the equidistant distribution of circumference of supporting beam 17, the annular fixed block 20 of the coaxial fixedly connected with ring in week side of stock 19's one end, stock 19 is worn to locate base 18 and is pegged graft in the diapire of foundation ditch along vertical direction, fixed block 20 supports tightly with the side of going up of base 18.

Refer to fig. 5, it is connected with columniform bearing post 21 to prop up supporting beam 17's top coaxial rotation, the coaxial fixedly connected with spliced pole 22 of bearing post 21, spliced pole 22 keeps away from the coaxial fixed connection ring 23 in week side of the one end of bearing post 21, the week side cover of ring 23 is established and is fixed with the rubber layer, supporting beam 17 keeps away from the center department of the one end of base 18 and offers the spread groove 24 with spliced pole 22 adaptation, supporting beam 17 has seted up annular groove 25 in the cell wall department of spread groove 24 is coaxial, ring 23 and rubber layer are located annular groove 25 and slide the adaptation with annular groove 25 along spliced pole 22's circumference, bearing post 21 runs through the bearing groove 26 (refer to fig. 1) of offering the centre department that is used for bearing longeron 3 along the horizontal direction in one side that supporting beam 17 deviates from, longeron 3's week side and bearing groove 26 grafting adaptation.

The anchor rod 19 penetrates through the base 18 in the vertical direction and is inserted into the bottom wall of the foundation pit, the fixing block 20 abuts against the upper side face of the base 18, the supporting beam 17 is kept vertical in the foundation pit stably, and when the longitudinal beam 3 is moved to be aligned with the two limiting grooves 11, a constructor applies force to rotate the supporting column 21, so that the supporting groove 26 is aligned with the peripheral side of the longitudinal beam 3.

Utilize the frictional force between rubber layer increase girth 23 and the supporting beam 17, do benefit to and prevent that bearing post 21 from rotating easily, thereby be convenient for longeron 3 to remove smoothly to the bearing groove 26 in, when longeron 3 is fixed with crossbeam 2, longeron 3 is stably located in bearing groove 26, thereby be favorable to supporting beam 17 to support the middle department of longeron 3 firmly, do benefit to the atress ability that improves longeron 3, prevent that the middle department of longeron 3 from buckling because stress is too big, thereby reduce the book damage of longeron 3, do benefit to recycle longeron 3.

The implementation principle of the supporting structure for the deep foundation pit supporting engineering provided by the embodiment of the application is as follows:

move crossbeam 2 to on a plurality of supporting shoes 4 and make a plurality of locating pieces 8 peg graft respectively in a plurality of constant head tanks 7, then along the horizontal direction with crossbeam 2 move to between supporting shoe 4 and the locking piece 5 and with steel sheet pile 1 butt, wear to locate locking hole 10 and twist first screw with first bolt 9 after that for crossbeam 2 is fixed in between supporting shoe 4 and the

locking piece

5, 11 one-to-one in a plurality of spacing grooves on two crossbeams 2 this moment.

Utilize stock 19 and fixed block 20 to fix base 18 and the diapire of foundation ditch, constructor application of force rotates bearing post 21, make bearing groove 26 align with two spacing grooves 11 that correspond, move longeron 3 to two spacing grooves 11 and the bearing groove 26 that correspond along vertical direction in, establish 6 covers the apron and establish with the week side of longeron 3 and make two sliders 16 slide into respectively in two spouts 15 along the horizontal direction, utilize second bolt 14 to fix otic placode 13 and crossbeam 2, thereby make the tip of longeron 3 be fixed in between apron 6 and the crossbeam 2 steadily.

The second bolt 14 is taken out, the sliding block 16 slides away from the sliding groove 15 along the horizontal direction, the cover plate 6 and the cross beam 2 can be separated, namely, the longitudinal beam 3 can be detached, then the first bolt 9 is taken down, namely, the cross beam 2 slides away from the lower part of the locking block 5 along the horizontal direction, the cross beam 2 can be detached, the effect of conveniently mounting and detaching the cross beam 2 and the longitudinal beam 3 is realized, and the cross beam 2 and the longitudinal beam 3 are favorably recycled.

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

Claims

1. The utility model provides a supporting construction for deep basal pit supporting engineering which characterized in that: including two crossbeams (2), a plurality of longerons (3) and a plurality of steel sheet pile (1) that set up in two relative lateral walls departments of foundation ditch, it is a plurality of with one side equal fixedly connected with supporting shoe (4) of steel sheet pile (1), crossbeam (2) are located a plurality of on supporting shoe (4) and with supporting shoe (4) releasable connection, the both ends of longeron (3) are located two respectively on crossbeam (2) and all with steel sheet pile (1) butt, the tip cover of longeron (3) is equipped with apron (6), apron (6) with crossbeam (2) releasable connection just makes longeron (3) are located apron (6) with between crossbeam (2).

2. The supporting structure for a deep foundation pit supporting construction according to claim 1, wherein: the supporting block (4) penetrates through the positioning groove (7) in the vertical direction, the crossbeam (2) is fixedly connected with a plurality of positioning blocks (8), the positioning blocks (8) are in one-to-one correspondence with the positioning grooves (7), and the positioning blocks (8) are matched with the positioning grooves (7) in a sliding mode along the direction of the steel sheet pile (1).

3. The supporting structure for a deep foundation pit supporting construction according to claim 1, wherein: the steel sheet pile (1) is fixedly connected with a plurality of locking blocks (5) on one side of the cross beam (2) departing from the supporting block (4), and the locking blocks (5) are provided with locking pieces for fixing the cross beam (2).

4. The supporting structure for a deep foundation pit supporting construction according to claim 3, wherein: the locking piece comprises a first bolt (9), and the first bolt (9) penetrates through the locking block (5) and is in threaded connection with the cross beam (2).

5. The supporting structure for a deep foundation pit supporting construction according to claim 1, wherein: two crossbeam (2) one side in opposite directions has all seted up a plurality of spacing groove (11), spacing groove (11) orientation steel sheet pile (1) runs through the setting, spacing groove (11) deviate from one side of supporting shoe (4) sets up for the opening, two a plurality of on crossbeam (2) spacing groove (11) one-to-one, peg graft respectively in two of mutual correspondence in longeron (3) relative both ends just with spacing groove (11) grafting adaptation.

6. The supporting structure for a deep foundation pit supporting construction according to claim 1, wherein: apron (6) orientation steel sheet pile (1) runs through and has seted up arc wall (12), arc wall (12) orientation one side of crossbeam (2) sets up for the opening, week side of longeron (3) with the cell wall butt of arc wall (12), the equal fixedly connected with otic placode (13) in both sides that apron (6) is relative, otic placode (13) through second bolt (14) with crossbeam (2) fixed connection.

7. The supporting structure for a deep foundation pit supporting construction according to claim 5, wherein: one side of the cross beam (2) departing from the supporting block (4) is provided with a plurality of sliding grooves (15) close to the limiting groove (11), the opening of each sliding groove (15) is gradually reduced along the direction departing from the cross beam (2), each sliding groove (15) penetrates through the cross beam (2) along the direction towards the steel sheet pile (1), the cover plate (6) is fixedly connected with a plurality of sliding blocks (16), and the sliding blocks (16) are in one-to-one correspondence with the sliding grooves (15) and are matched in sliding.

8. The supporting structure for a deep foundation pit supporting construction according to claim 1, wherein: a supporting beam (17) is arranged on the bottom wall of the foundation pit below each longitudinal beam (3), a supporting column (21) is arranged at the top end of each supporting beam (17), and a supporting groove (26) used for supporting the middle of each longitudinal beam (3) is formed in the supporting column (21) in a penetrating mode.