CN114045840A - Soft soil deep foundation pit combined supporting structure and construction method - Google Patents
Soft soil deep foundation pit combined supporting structure and construction method Download PDFInfo
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- CN114045840A CN114045840A CN202111437575.6A CN202111437575A CN114045840A CN 114045840 A CN114045840 A CN 114045840A CN 202111437575 A CN202111437575 A CN 202111437575A CN 114045840 A CN114045840 A CN 114045840A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
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Abstract
The utility model relates to a soft soil deep foundation pit combined supporting structure and a construction method, which are applied to the field of foundation pit supporting technology and comprise a double-row pile body, wherein the double-row pile body comprises a front row pile and a rear row pile which are arranged in parallel, the front row pile is arranged along the periphery of the foundation pit, the rear row pile is positioned at one side of the front row pile, which is back to the foundation pit, a pile top connecting beam is connected between the pile tops of the front row pile and the rear row pile, soft soil is filled between the front row pile and the rear row pile, water-stop curtain piles which are mutually occluded are arranged between the pile bodies of the adjacent front row piles, a plurality of supporting boxes are arranged in the foundation pit and are fixed in the soft soil at the bottom of the foundation pit, inclined supporting columns are arranged between the supporting boxes and the front row pile, and the supporting boxes and the inclined supporting columns are arranged in a one-to-one correspondence manner; one end of each diagonal brace is hinged to the corresponding front row pile, the other end of each diagonal brace is located in the corresponding support box, a tightening mechanism used for pushing each diagonal brace to tightly support the corresponding front row pile is arranged in each foundation pit, and the tightening mechanism is fixed to the corresponding support box. This application has the effect that improves foundation ditch supporting construction's stability.
Description
Technical Field
The application relates to the technical field of foundation pit supporting, in particular to a soft soil deep foundation pit combined supporting structure and a construction method.
Background
The foundation pit support 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 common foundation pit supporting modes comprise row pile supporting, underground continuous wall supporting, pile or wall supporting system, reinforced concrete row pile and other forms, can be selected after comprehensively evaluating the working conditions of the depth, soil quality and the like of the foundation pit, or can be reasonably combined by various supporting modes.
Chinese patent publication No. CN209443473U discloses a double-row pile supporting structure for a foundation pit, which includes a front row of piles and a rear row of piles inserted into a soil layer, wherein the depth of the front row of piles inserted into the soil layer is smaller than the depth of the rear row of piles inserted into the soil layer; the top parts of the front row of piles and the rear row of piles are provided with cap beams; a cover plate is fixedly connected between the cap beam of the front row of piles and the cap beam of the rear row of piles; and soil between piles is filled between the front row of piles and the rear row of piles.
In view of the above-mentioned related technologies, the inventor believes that in a soft soil foundation pit, due to the strong rheological property of the soft soil, the double-row pile supporting structure is prone to deform when being squeezed by the soft soil, so that the whole foundation pit supporting structure is prone to deform and damage.
Disclosure of Invention
In order to solve the problem that a double-row pile supporting structure is easy to deform and damage, the application provides a soft soil deep foundation pit combined supporting structure and a construction method.
In a first aspect, the application provides a soft soil deep foundation pit combined supporting structure, adopts following technical scheme:
a soft soil deep foundation pit combined supporting structure comprises double-row pile bodies arranged along the periphery of a foundation pit, wherein each double-row pile body comprises a front row pile and a rear row pile which are arranged in parallel, each front row pile is arranged along the periphery of the foundation pit, each rear row pile is positioned on one side, back to the foundation pit, of each front row pile, a pile top connecting beam is connected between pile tops of the front row piles and the pile tops of the rear row piles, soft soil is filled between the front row piles and the back row piles, waterproof curtain piles which are mutually occluded are arranged between adjacent pile bodies of the front row piles, a plurality of supporting boxes are arranged in the foundation pit and fixed in the soft soil at the bottom of the foundation pit, inclined supporting columns are arranged between the supporting boxes and the front row piles, and the supporting boxes and the inclined supporting columns are arranged in a one-to-one correspondence manner; one end of each inclined strut is hinged to the corresponding front row pile, the other end of each inclined strut is located in the corresponding support box, a tight supporting mechanism used for pushing the inclined struts to tightly support the front row piles is arranged in the foundation pit, and the tight supporting mechanism is fixed to the corresponding support box.
Through adopting above-mentioned technical scheme, the stagnant water curtain stake is used for the foundation ditch stagnant water, can form the support to double row pile body through bracing column and support tight mechanism to reduce double row pile body and take place to warp and lead to foundation ditch supporting structure to take place the possibility of deformation damage, thereby can improve foundation ditch supporting structure's stability. The support box increases the contact area of the diagonal brace and the soft soil in the foundation pit, so that the diagonal brace can more stably support the double-row pile body.
Optionally, the abutting mechanism comprises an abutting plate, a first linear driving assembly and a mounting seat, the abutting plate is sleeved on the diagonal brace and connected with the diagonal brace, the mounting seat is fixed at the top of the abutting box, one end of the first linear driving assembly is fixed on the mounting seat, and the other end of the first linear driving assembly is fixed on the abutting plate.
Through adopting above-mentioned technical scheme, promote through sharp drive assembly and support the fagging, make the bracing post can support tight front row pile to form more stable the strutting to the double row pile body, and then improve the effect of strutting of double row pile body to the foundation ditch.
Optionally, the abutting mechanism includes an auxiliary support assembly, a linear driving assembly two, a mounting assembly and a pair of brackets for fixing the mounting assembly, the diagonal brace is located between the pair of brackets, the brackets are fixed on the abutting box, and one end of each bracket, which is far away from the abutting box, is not fixed to the front row of piles; the mounting assembly is arranged on the support and slides in a reciprocating mode along the support, the mounting assembly is connected with the inclined strut and slides in a reciprocating mode along the inclined strut, the linear driving assembly II is fixed to the mounting assembly, one end of the auxiliary strut assembly is tightly supported to the front row of piles, the other end of the auxiliary strut assembly is sleeved with the inclined strut and slides in a reciprocating mode along the inclined strut, and the linear driving assembly II is tightly supported to the auxiliary strut assembly.
Through adopting above-mentioned technical scheme, the installation component is used for fixed sharp drive assembly two, and the support is used for the fixed mounting subassembly, promotes through sharp drive assembly two and assists the subassembly that props, makes to assist and props the subassembly and support the double row pile body tightly on the preceding row pile, also can make the bracing strut further tightly the preceding row pile through sharp drive assembly two simultaneously to make the double row pile body can strut the foundation ditch more steadily. In addition, the installation component can drive the second linear driving component to slide along the diagonal brace, and the auxiliary supporting component can also slide along the diagonal brace, so that the auxiliary supporting component can be abutted to any position of the front row of piles, the position of the auxiliary supporting component abutted to the front row of piles is adjusted according to the excavation depth of the foundation pit, the double-row pile bodies are supported more stably, and the double-row pile bodies are supported more stably on the foundation pit.
Optionally, the auxiliary supporting assembly comprises an auxiliary supporting plate, a straight supporting column and a supporting block, the supporting block is sleeved on the inclined supporting column and slides back and forth along the inclined supporting column, the second linear driving assembly is tightly supported on the supporting block, the supporting block faces back to one side of the second linear driving assembly and the straight supporting column are connected, the straight supporting column is far away from one end of the supporting block and the auxiliary supporting plate are connected, and the auxiliary supporting plate is tightly supported on the front row of piles.
Through adopting above-mentioned technical scheme, the support point that the bracing subassembly has increased the bracing column to the front row pile forms two support points "upper", "lower", promotes through sharp drive assembly two and supports the kicking block, can make and assist the fagging and support tightly on the front row pile, also can make the bracing column further support tightly the front row pile simultaneously to make the bracing column can support the double row pile body more steadily.
Optionally, the straight supporting column includes a fixed column and a movable column slidably disposed in the fixed column, the fixed column is connected to the supporting block, the movable column is connected to the auxiliary supporting plate, and the fixed column is connected to the movable column through a connecting bolt; the movable column is provided with a plurality of connecting holes I along the length direction of the movable column, a plurality of connecting holes II along the length direction of the movable column, and the connecting bolts penetrate through the connecting holes I and the connecting holes II.
Through adopting above-mentioned technical scheme, straight dagger comprises fixed column and the movable column that mutual slip cup jointed, make straight dagger have flexible function, when supporting the kicking block, installation component and straight line drive assembly two remove assigned position and fixed back, adjust the movable column and make and assist the fagging and support tightly on the front row pile, make and support the kicking block and offset tightly with the bracing column, then pass connecting hole one and connecting hole two simultaneously with connecting bolt, make and assist fagging and straight dagger and support and can support on the front row pile, restart straight line drive assembly two and make and assist fagging and straight dagger and can further support the double row pile on the front row pile tightly.
Optionally, the installation component includes the mounting panel and connects the slider in the mounting panel both sides, the mounting panel cover is established just along the reciprocal slip of bracing piece on the bracing piece, straight line drive assembly two is fixed on the mounting panel, support the brace butt and be in on the mounting panel, the slider is with a pair of leg joint just follows the reciprocal slip of support.
Through adopting above-mentioned technical scheme, the mounting panel is used for fixed sharp drive assembly two, and the slider just can slide along the support with leg joint to make mounting panel and sharp drive assembly two can follow the raking prop and slide, and can be fixed by the support after adjusting the position.
Optionally, the support includes a main rod, a plurality of auxiliary rods, and a clamping plate for fixing the mounting plate, the main rod is obliquely arranged along the diagonal bracing column and fixed on the support box, one end of the main rod, which is far away from the support box, is not fixed with the front row of piles, the auxiliary rods are tightly supported on the main rod, and one end of the auxiliary rods, which is far away from the main rod, is inserted into the soft soil at the bottom of the foundation pit; the clamping device is characterized in that a sliding hole for the sliding block to pass through in a matched mode is formed in the main rod, the sliding block can slide along the sliding hole, one side, back to the mounting plate, of the main rod is located on two sides of the sliding hole, a plurality of bearing plates are arranged on two sides of the sliding hole, the clamping plate is arranged on the bearing plates, and the sliding block is abutted to the clamping plate tightly.
Through adopting above-mentioned technical scheme, the slider can slide along the slide opening, makes the mounting panel can slide along the bracing strut, through joint board bearing slider, the bearing board bearing joint board to can be fixed with the mounting panel.
Optionally, at least one blade is arranged on the part, located in the support box, of the diagonal bracing column.
Through adopting above-mentioned technical scheme, the blade can increase the bracing column and support the area of contact of incasement pouring, makes the bracing column can be more stable support double row pile body.
In a second aspect, the application provides a construction method for applying a soft soil deep foundation pit combined supporting structure, which adopts the following technical scheme:
a construction method applying a soft soil deep foundation pit combined supporting structure comprises the following steps:
s1, calibrating the pile positions of the front row of piles, the rear row of piles and the waterproof curtain piles on a construction site according to construction drawings, guiding holes by using a drilling machine according to the marked positions of the waterproof curtain piles, spraying grouting by using a jet grouting machine, and forming the waterproof curtain piles after construction is completed;
s2, constructing double-row piles and pile top connecting beams, manufacturing pile body reinforcement cages, starting pile drilling according to the calibration positions of front row piles and rear row piles, placing the pile body reinforcement cages into the pile holes, pouring concrete, forming the front row piles and the rear row piles after the concrete is solidified, arranging pile top connecting beam templates between the front row piles and the rear row piles, pouring the concrete into the pile top connecting beam templates, and forming the pile top connecting beams after the concrete is solidified;
s3, excavating soft soil to primarily form a foundation pit, reserving the soft soil on the side wall of the foundation pit to form a reserved soil slope while excavating the soft soil, wherein the distance between the top of the reserved soil slope and the bottom of the foundation pit is not less than 1/2 of the depth of the foundation pit;
s4, excavating soft soil along the periphery of the reserved soil slope in the foundation pit to form a plurality of pits for accommodating the supporting boxes;
s5, horizontally placing the support box into the pit, enabling the top of the support box to be located outside the pit, backfilling a gap between the support box and the pit with soil, and compacting;
s6, hoisting the diagonal brace into the foundation pit, enabling one end of the diagonal brace to prop against the front row of piles, enabling the other end of the diagonal brace to be located in the propping box, and then hinging the diagonal brace on the front row of piles;
s7, fixing a mounting seat on the top of any side wall of the support box;
s8, fixing one end of the first linear driving assembly on the mounting seat, fixing the other end of the first linear driving assembly on the supporting plate, and starting the first linear driving assembly to enable the inclined supporting columns to tightly support the front row of piles;
s9, pouring concrete into the support box to enable the inclined support column to wrap the part, located in the support box, of the concrete;
s10, after the concrete is solidified, stopping the first linear driving assembly or the first linear driving assembly to continue working and prop against the diagonal bracing column;
and S11, removing the reserved soil slope and finishing excavation of the foundation pit.
By adopting the technical scheme, the foundation pit is supported, and the eleven steps are summarized into three stages in total. The first stage is a waterproof curtain pile construction stage, and the waterproof curtain pile plays a role in stopping water of the foundation pit; the second stage is a double-row pile body construction stage, and the double-row pile bodies play roles in retaining soil and supporting a foundation pit; the third stage is the double row pile bearing diagonal construction stage, and it makes the bracing strut further support tightly the double row pile body to promote to support the fagging through sharp drive assembly one, can reduce the possibility that the double row pile body takes place to warp, and then the possibility that reducible whole foundation ditch supporting construction takes place to warp the damage.
In a third aspect, the application further provides a construction method using the soft soil deep foundation pit combined supporting structure, and the following technical scheme is adopted:
a construction method applying a soft soil deep foundation pit combined supporting structure comprises the following steps:
s1, calibrating the pile positions of the front row of piles, the rear row of piles and the waterproof curtain piles on a construction site according to construction drawings, guiding holes by using a drilling machine according to the marked positions of the waterproof curtain piles, spraying grouting by using a jet grouting machine, and forming the waterproof curtain piles after construction is completed;
s2, constructing double-row piles and pile top connecting beams, manufacturing pile body reinforcement cages, starting pile drilling according to the calibration positions of front row piles and rear row piles, placing the pile body reinforcement cages into the pile holes, pouring concrete, forming the front row piles and the rear row piles after the concrete is solidified, arranging pile top connecting beam templates between the front row piles and the rear row piles, pouring the concrete into the pile top connecting beam templates, and forming the pile top connecting beams after the concrete is solidified;
s3, excavating soft soil to primarily form a foundation pit, reserving the soft soil on the side wall of the foundation pit to form a reserved soil slope while excavating the soft soil, wherein the distance between the top of the reserved soil slope and the bottom of the foundation pit is not less than 1/2 of the depth of the foundation pit;
s4, excavating soft soil along the periphery of the reserved soil slope in the foundation pit to form a plurality of pits for accommodating the supporting boxes;
s5, horizontally placing the support box into the pit, enabling the top of the support box to be located outside the pit, backfilling a gap between the support box and the pit with soil, compacting, and pouring concrete into the support box;
s6, sleeving the mounting plate on the diagonal brace, sleeving the support block on the diagonal brace, binding the mounting plate and the straight brace on the diagonal brace, hoisting the diagonal brace into the foundation pit, supporting one end of the diagonal brace on the front row of piles, supporting the other end of the diagonal brace on the bottom surface of the support box, and hinging the diagonal brace on the front row of piles;
s7, fixing the linear driving assembly II on the mounting plate through bolts;
s8, uniformly inserting a plurality of auxiliary rods on the reserved soil slope, enabling one ends of the auxiliary rods to penetrate the reserved soil slope and be inserted into soft soil at the bottom of the foundation pit, and enabling the other ends of the auxiliary rods to be located outside the reserved soil slope;
s9, hanging the main rod into the foundation pit, fixing one end of the main rod on the side wall of the support box, extending the other end of the main rod to the front row of piles along the diagonal support column and abutting against the front row of piles, supporting the auxiliary rod on the main rod, simultaneously releasing the mounting plate from the diagonal support column, penetrating the sliding block through the sliding hole, adjusting the position of the mounting plate, placing the clamping plate on the support plate below the mounting plate, and fixing the mounting plate;
s10, after the length of the straight supporting rod is adjusted, the connecting bolt penetrates through the connecting hole I and the connecting hole II and is screwed tightly, so that the auxiliary supporting plate is abutted against the front row of piles, and the abutting block is abutted against the inclined supporting column;
s11, starting the second linear driving assembly to enable the second linear driving assembly to push the support block towards the front row of piles;
and S12, removing the reserved soil slope and finishing excavation of the foundation pit.
By adopting the technical scheme, the foundation pit is supported, and the twelve steps are summarized into three stages in total. The first stage is a waterproof curtain pile construction stage, and the waterproof curtain pile plays a role in stopping water of the foundation pit; the second stage is a double-row pile body construction stage, and the double-row pile bodies play roles in retaining soil and supporting a foundation pit; the third stage is the double row pile bearing diagonal construction stage, supports the double row pile body through bracing post and supplementary subassembly, and can promote through sharp drive assembly two and assist the subassembly to support the double row pile body, and the bracing post also further supports tightly the double row pile body under the effect of sharp drive assembly two simultaneously to can further reduce the possibility that the double row pile body takes place to warp, and then the possibility that reducible whole excavation supporting structure takes place to warp and damages.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the supporting plate is pushed by the first linear driving assembly, so that the inclined supporting columns can further tightly support the front row of piles, and therefore a more stable support is formed for the double-row pile bodies, and the supporting effect of the double-row pile bodies on the foundation pit is improved;
2. the auxiliary supporting component is additionally provided with supporting points of the inclined supporting columns on the front row of piles to form an upper supporting point and a lower supporting point, the supporting blocks are pushed by the linear driving component II, so that the auxiliary supporting plates can be tightly supported on the front row of piles, and meanwhile, the inclined supporting columns can be further tightly supported on the front row of piles, so that the inclined supporting columns can more stably support the double-row pile bodies;
3. when the inclined supporting columns abut against the front row of piles when the linear driving assembly is not started, the reserved soil slope can support the double-row pile bodies, and therefore the possibility of deformation of the double-row pile bodies can be reduced.
Drawings
Fig. 1 is a schematic view of a soft soil deep foundation pit combined supporting structure in an embodiment of the present application.
FIG. 2 is a cross-sectional view of a support box according to an embodiment of the present disclosure.
Fig. 3 is a schematic position diagram of a reserved soil slope in the first embodiment of the present application.
Fig. 4 is a schematic view of a soft soil deep foundation pit combined supporting structure in the second embodiment of the present application.
Fig. 5 is a schematic view of the abutting mechanism in the second embodiment of the present application.
Fig. 6 is a schematic position diagram of a reserved soil slope in the second embodiment of the present application.
Reference numerals: 1. a double row pile body; 101. front row piles; 102. back row piles; 103. connecting the pile top with a beam; 2. waterproof curtain piles; 3. supporting the box; 4. a diagonal bracing column; 5. a tightening mechanism; 51. supporting plates; 52. a first linear driving component; 53. a mounting seat; 54. an auxiliary support assembly; 541. auxiliary supporting plates; 542. a straight support column; 5421. fixing a column; 54211. a first connecting hole; 5422. a movable post; 54221. a second connecting hole; 543. a support block; 55. a second linear driving assembly; 56. mounting the component; 561. mounting a plate; 562. a slider; 57. a support; 571. a main rod; 5711. a slide hole; 572. an auxiliary rod; 573. a clamping and connecting plate; 58. a connecting bolt; 6. a support plate; 7. a blade; 8. and reserving a soil slope.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
The first embodiment is as follows:
the embodiment of the application discloses soft soil deep basal pit combination supporting construction.
Referring to fig. 1, soft soil deep foundation pit combination supporting construction, including the double row pile body 1 that sets up along the foundation ditch periphery, double row pile body 1 comprises front row pile 101, back row pile 102 and pile bolck link roof beam 103, front row pile 101 and back row pile 102 parallel arrangement each other, front row pile 101 evenly lays along the foundation ditch periphery, back row pile 102 lays in the soft soil outside the foundation ditch, pile bolck link roof beam 103 is connected between the pile bolck of front row pile 101 and the pile bolck of back row pile 102, double row pile body 1 plays the effect of retaining soil, strutting the foundation ditch. Waterproof curtain piles 2 which are mutually occluded are arranged among the pile bodies of the front row piles 101, and the waterproof curtain piles 2 play a role in stopping water in a foundation pit.
Referring to fig. 2, a plurality of supporting boxes 3 are uniformly distributed in the foundation pit along the periphery of the front row of piles 101, the supporting boxes 3 are fixed in soft soil at the bottom of the foundation pit, each supporting box 3 is internally provided with one bracing column 4, one end of each bracing column 4 is positioned in each supporting box 3, and the other end of each bracing column 4 is hinged to the front row of piles 101. The supporting box 3 is fixedly provided with a supporting mechanism 5 for pushing the inclined supporting column 4 to tightly support the front row of piles 101, the supporting mechanism 5 is composed of a supporting plate 51, a first linear driving assembly 52 and a mounting seat 53, the supporting plate 51 is sleeved and fixed on the inclined supporting column 4, the mounting seat 53 is fixed on the side wall of the supporting box 3, one end of the first linear driving assembly 52 is fixed on the mounting seat 53, the other end of the first linear driving assembly is tightly supported on the supporting plate 51, the first linear driving assembly 52 can adopt a hydraulic push rod, a jack, a screw rod and the like, and in the embodiment, the first linear driving assembly 52 adopts the jack. The first linear driving assembly 52 is started to enable the inclined strut 4 to further abut against the front row of piles 101, so that the stability of the double-row pile body 1 can be further improved, and the stability of a foundation pit supporting structure can be further improved.
In addition, support case 3 and be the stereoplasm uncovered box, can increase the area of contact of bracing column 4 and foundation ditch bottom weak soil on the one hand through supporting case 3, make bracing column 4 can support double row pile body 1 more steadily. On the other hand, after the first linear driving assembly 52 pushes the inclined supporting columns 4 to further abut against the front row of piles 101, concrete is poured into the abutting box 3, after the concrete is completely solidified, the first linear driving assembly 52 can be stopped in consideration of energy conservation, and if the energy conservation is not considered, the first linear driving assembly 52 can be continuously used for assisting in abutting against the inclined supporting columns 4, so that the inclined supporting columns 4 can more stably support the double-row pile body 1.
Referring to fig. 2, in addition, the part that the bracing column 4 is located to support the case 3 is connected with at least one blade 7, can increase the area of contact between bracing column 4 and the concrete through blade 7, further improves the support effect of bracing column 4 to double row pile body 1, and then improves the effect of strutting of double row pile body 1 to the foundation ditch.
The implementation principle of the soft soil deep foundation pit combined supporting structure in the embodiment of the application is as follows: the inclined supporting columns 4 are pushed to tightly abut against the double-row pile bodies 1 through the linear driving assemblies 52, so that the possibility that the deformation damage of the foundation pit supporting structure caused by the deformation of the double-row pile bodies 1 can be reduced.
The embodiment of the application also discloses a construction method applying the soft soil deep foundation pit combined supporting structure.
Referring to fig. 1, 2 and 3, a construction method for applying a soft soil deep foundation pit combined supporting structure includes the following steps:
s1, calibrating the pile positions of the front row pile 101, the rear row pile 102 and the waterproof curtain pile 2 on a construction site according to construction drawings, guiding holes by a drilling machine according to the calibration position of the waterproof curtain pile 2, spraying and grouting by a jet grouting machine, forming the waterproof curtain pile 2 after construction is finished, and achieving the purpose of foundation pit water stopping through the waterproof curtain pile 2;
s2, constructing double-row piles and pile top connecting beams 103, manufacturing pile body reinforcement cages, starting pile drilling according to the calibration positions of front row piles 101 and rear row piles 102, placing the pile body reinforcement cages into the pile holes, pouring concrete, forming the front row piles 101 and the rear row piles 102 after the concrete is solidified, arranging pile top connecting beam 103 templates between the front row piles 101 and the rear row piles 102, then pouring the concrete into the pile top connecting beam 103 templates, forming the pile top connecting beams 103 after the concrete is solidified, and realizing soil retaining and supporting on the foundation pit by the double-row pile bodies 1;
s3, excavating soft soil to preliminarily form a foundation pit, reserving the soft soil on the side wall of the foundation pit to form a reserved soil slope 8 while excavating the soft soil, wherein the distance between the top of the reserved soil slope 8 and the bottom of the foundation pit is not less than 1/2 of the depth of the foundation pit, and the reserved soil slope 8 can support the double-row pile bodies 1, so that the possibility of deformation of the double-row pile bodies 1 can be reduced;
s4, excavating soft soil along the periphery of the reserved soil slope 8 in the foundation pit to form a plurality of pits for accommodating the supporting boxes 3;
s5, horizontally placing the supporting box 3 into the pit, enabling the top of the supporting box 3 to be located outside the pit, backfilling a gap between the supporting box 3 and the pit with soil, and compacting to enable the supporting box 3 to be stably fixed in soft soil;
s6, hoisting the diagonal brace 4 into the foundation pit, enabling one end of the diagonal brace 4 to be supported on the front row of piles 101, enabling the other end of the diagonal brace 4 to be located in the supporting box 3, and then hinging the diagonal brace 4 on the front row of piles 101;
s7, fixing a mounting seat 53 on the top of any side wall of the support box 3;
s8, fixing one end of the first linear driving assembly 52 on the mounting base 53, fixing the other end of the first linear driving assembly 52 on the supporting plate 51, and starting the first linear driving assembly 52 to enable the inclined supporting columns 4 to tightly support the front row of piles 101;
s9, pouring concrete into the supporting box 3, enabling the inclined supporting columns 4 to wrap the parts, located in the supporting box 3, of the inclined supporting columns and the blades 7, increasing the contact area of the inclined supporting columns 4 and the concrete through the blades 7, and enabling the inclined supporting columns 4 to stably support the double-row pile bodies 1;
s10, after the concrete is solidified, stopping the linear driving assembly I52, and only abutting against the front row of piles 101 through the inclined supporting columns 4 to achieve the energy-saving effect; or the first linear driving assembly 52 continues to work to assist in propping against the diagonal bracing column 4, so that the diagonal bracing column 4 can more stably support the front row pile 101 body;
and S11, removing the reserved soil slope 8 and finishing excavation of the foundation pit.
Example two:
referring to fig. 4 and 5, the difference between the first embodiment and the second embodiment is that the soft soil deep foundation pit combined supporting structure, the abutting mechanism 5 includes a secondary supporting component 54, a second linear driving component 55, a mounting component 56 and a pair of brackets 57 for fixing the mounting component 56, wherein one bracket 57 is fixed on one side of the bracing column 4, and the other bracket 57 is fixed on the other side of the bracing column 4. The mounting assembly 56 is composed of a mounting plate 561 and sliders 562 fixed on two sides of the mounting plate 561, the mounting plate 561 is slidably sleeved on the diagonal support 4, the sliders 562 are slidably connected with the support 57, the mounting plate 561 can move along the diagonal support 4, and the support 57 can fix the sliders 562 after the position of the mounting plate 561 is adjusted. The second linear driving assembly 55 is fixed on the mounting plate 561, and the second linear driving assembly 55 may adopt a jack, a push rod, a screw rod, and the like, in this embodiment, the second linear driving assembly 55 adopts an electric push rod. One end of the auxiliary supporting component 54 is tightly supported on the front row of piles 101, the other end of the auxiliary supporting component 54 is connected with the inclined supporting column 4 in a sliding mode, the second linear driving component 55 is tightly supported at one end, far away from the front row of piles 101, of the auxiliary supporting component 54, the second linear driving component 55 pushes the auxiliary supporting component 54, the auxiliary supporting component 54 is tightly supported on the front row of piles 101 to support the double-row pile bodies 1, meanwhile, the inclined supporting column 4 can be further tightly supported on the front row of piles 101 through the second linear driving component 55, and therefore the double-row pile bodies 1 can stably support a foundation pit.
Referring to fig. 4 and 5, the auxiliary supporting assembly 54 includes an auxiliary supporting plate 541, a straight supporting column 542 and a supporting block 543, the straight supporting column 542 includes a fixed column 5421 and a movable column 5422 which are slidably sleeved with each other, the movable column 5422 is connected with the auxiliary supporting plate 541, the fixed column 5421 is connected with the supporting block 543, and the movable column 5422 is disposed in the fixed column 5421 and connected by a connecting bolt 581, so that the straight supporting column 542 can extend and retract. One side of the auxiliary supporting plate 541, which faces away from the movable column 5422, abuts against the front row of piles 101, the abutting block 543 is slidably sleeved on the inclined supporting column 4, and the second linear driving assembly 55 pushes the straight supporting column 542 and the auxiliary supporting plate 541 to further abut against the front row of piles 101 to support the double-row pile body 1. Because support the piece 543 and can follow diagonal brace 4 and slide, mounting panel 561 drives two 55 of sharp drive assembly and slides along diagonal brace 4, and it is scalable to just prop stand 542 directly to make and assist the arbitrary position that props subassembly 54 can support tightly at front row pile 101, so that excavate the position that degree of depth adjustment was assisted props subassembly 54 and is supported tightly on front row pile 101 according to the foundation ditch, thereby support double row pile body 1 more steadily, and then make double row pile body 1 support the foundation ditch more steadily.
Referring to fig. 5, a plurality of first connection holes 54211 are formed in the fixed column 5421 along the length direction thereof, a plurality of second connection holes 54221 are formed in the movable column 5422 along the length direction thereof, and the movable column 5422 and the fixed column 5421 can be fixed by simultaneously inserting the connection bolts 581 into the first connection holes 54211 and the second connection holes 54221 and tightening the connection bolts 581.
Referring to fig. 5, the bracket 57 includes a main rod 571, a plurality of auxiliary rods 572, and a clamping plate 573 for fixing the mounting plate 561, the main rod 571 is obliquely disposed along the direction of the diagonal brace 4 and fixed on the top of the sidewall of the supporting box 3, one end of the main rod 571, which is far away from the supporting box 3, abuts against the front row of piles 101, a sliding hole 5711 for the slider 562 to pass through in a matching manner is disposed on the main rod 571, and the slider 562 can move stably after passing through the sliding hole 5711. The side of the main rod 571, which is opposite to the mounting plate 561, on the two sides of the sliding hole 5711 is connected with a plurality of supporting plates 6, after the mounting plate 561 is moved to a designated position by a linear driving device, a suspension device or a manual operation, the clamping plate 573 is placed on two supporting plates 6 at the same horizontal height below the slider 562, and the slider 562 is abutted against the clamping plate 573, so that the mounting plate 561 is fixed.
The implementation principle of the soft soil deep foundation pit combined supporting structure in the embodiment of the application is as follows: the supporting points of the inclined supporting columns 4 on the front row piles 101 are added to the auxiliary supporting plates 541 to form two supporting points of an upper supporting point and a lower supporting point, the supporting blocks 543 are pushed through the second linear driving assembly 55, the straight supporting columns 542 can push the auxiliary supporting plates 541 to be tightly abutted to the front row piles 101, meanwhile, the inclined supporting columns 4 can be further tightly abutted to the front row piles 101, and therefore the inclined supporting columns 4 can more stably support the double-row pile bodies 1. In addition, the mounting plate 561 can drive the second linear driving assembly 55 to slide along the diagonal brace 4, and the supporting block 543 can also slide along the diagonal brace 4, so that the auxiliary bracing plate 541 and the straight brace 542 can be abutted against any position on the front row pile 101, and the position where the auxiliary bracing plate 541 is abutted against the front row pile 101 can be adjusted according to the excavation depth of the foundation pit, so that the double row pile body 1 is more stably supported, and the double row pile body 1 is more stably supported for the foundation pit.
The embodiment of the application also discloses a construction method applying the soft soil deep foundation pit combined supporting structure.
Referring to fig. 4, 5 and 6, a construction method for applying a soft soil deep foundation pit combined supporting structure includes the following steps:
s1, calibrating the pile positions of the front row pile 101, the rear row pile 102 and the waterproof curtain pile 2 on a construction site according to construction drawings, guiding holes by a drilling machine according to the calibration position of the waterproof curtain pile 2, spraying and grouting by a jet grouting machine, forming the waterproof curtain pile 2 after construction is finished, and achieving the purpose of foundation pit water stopping through the waterproof curtain pile 2;
s2, constructing double-row piles and pile top connecting beams 103, manufacturing pile body reinforcement cages, starting pile drilling according to the calibration positions of front row piles 101 and rear row piles 102, placing the pile body reinforcement cages into the pile holes, pouring concrete, forming the front row piles 101 and the rear row piles 102 after the concrete is solidified, arranging pile top connecting beam 103 templates between the front row piles 101 and the rear row piles 102, then pouring the concrete into the pile top connecting beam 103 templates, forming the pile top connecting beams 103 after the concrete is solidified, and realizing soil retaining and supporting on the foundation pit by the double-row pile bodies 1;
s3, excavating soft soil to preliminarily form a foundation pit, reserving the soft soil on the side wall of the foundation pit to form a reserved soil slope 8 while excavating the soft soil, wherein the distance between the top of the reserved soil slope 8 and the bottom of the foundation pit is not less than 1/2 of the depth of the foundation pit, and the reserved soil slope 8 can support the double-row pile bodies 1, so that the possibility of deformation of the double-row pile bodies 1 can be reduced;
s4, excavating soft soil along the periphery of the reserved soil slope 8 in the foundation pit to form a plurality of pits for accommodating the supporting boxes 3;
s5, horizontally placing the supporting box 3 into the pit, enabling the top of the supporting box 3 to be located outside the pit, backfilling a gap between the supporting box 3 and the pit with soil, compacting, pouring concrete into the supporting box 3, enabling the supporting box 3 to be stably fixed in soft soil, and enabling the inclined supporting columns 4 to more stably support the front row pile 101 body;
s6, sleeving a mounting plate 561 on the inclined strut 4, sleeving a supporting block 543 on the inclined strut 4, binding the mounting plate 561 and the straight strut 542 on the inclined strut 4, hoisting the inclined strut 4 into a foundation pit, enabling one end of the inclined strut 4 to support against the front row of piles 101, enabling the other end of the inclined strut 4 to support against the bottom surface of the supporting box 3, and then hinging the inclined strut 4 on the front row of piles 101;
s7, fixing the second linear driving assembly 55 on the mounting plate 561 through bolts, so that the second linear driving assembly 55 can stably push the supporting block 543 and can move together with the mounting plate 561;
s8, uniformly inserting a plurality of auxiliary rods 572 on the reserved soil slope 8, enabling one ends of the auxiliary rods 572 to penetrate through the reserved soil slope 8 and be inserted into soft soil at the bottom of the foundation pit, and enabling the other ends of the auxiliary rods 572 to be located outside the reserved soil slope 8;
s9, hanging the main rod 571 into the foundation pit, fixing one end of the main rod 571 on the sidewall of the support box 3, extending the other end of the main rod 571 to the front row pile 101 along the diagonal brace 4 and abutting against the front row pile 101, at this time, the auxiliary rod 572 supports the main rod 571, and the auxiliary rod 572 supports the main rod 571 to increase the stability of the main rod 571, so that the main rod 571 can more stably fix the mounting plate 561; meanwhile, the mounting plate 561 is separated from the diagonal brace 4, the slide block 562 passes through the slide hole 5711, the position of the mounting plate 561 is adjusted, and then the clamping plate 573 is placed on the supporting plate 6 below the mounting plate 561 to fix the mounting plate 561;
s10, after the length of the straight supporting column 542 is adjusted, the connecting bolt 581 is simultaneously penetrated through the connecting hole I54211 and the connecting hole II 54221 and screwed, so that the auxiliary supporting plate 541 is tightly pressed on the front row of piles 101, and the supporting block 543 is tightly pressed on the inclined supporting column 4, so as to support the double-row pile body 1;
s11, starting the second linear driving assembly 55 to make the second linear driving assembly 55 push the supporting block 543 toward the front row of piles 101, so that the auxiliary supporting plate 541 is tightly supported on the front row of piles 101, and at the same time, the bracing column 4 can be further tightly supported on the front row of piles 101, so that the bracing column 4 can more stably support the double-row pile body 1;
and S12, removing the reserved soil slope 8 and finishing excavation of the foundation pit.
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 (10)
1. The utility model provides a weak soil deep basal pit combination supporting construction, include double row pile body (1) that sets up along the foundation ditch periphery, double row pile body (1) is including front row pile (101) and back row pile (102) of mutual parallel arrangement, front row pile (101) set up along the foundation ditch periphery, back row pile (102) are located one side of front row pile (101) foundation ditch dorsad, be connected with pile bolck even roof beam (103) between the pile bolck of front row pile (101) and back row pile (102), the weak soil is filled between front row pile (101) and back row pile (102), its characterized in that: waterproof curtain piles (2) which are mutually occluded are arranged between pile bodies of adjacent front row piles (101), a plurality of supporting boxes (3) are arranged in a foundation pit, the supporting boxes (3) are fixed in soft soil at the bottom of the foundation pit, inclined supporting columns (4) are arranged between the supporting boxes (3) and the front row piles (101), and the supporting boxes (3) and the inclined supporting columns (4) are arranged in a one-to-one correspondence manner; one end of each diagonal brace (4) is hinged to the corresponding front row pile (101), the other end of each diagonal brace (4) is located in the corresponding supporting box (3), a supporting mechanism (5) used for pushing the corresponding diagonal brace (4) to tightly support the corresponding front row pile (101) is arranged in the foundation pit, and the supporting mechanism (5) is fixed to the corresponding supporting box (3).
2. The soft soil deep foundation pit combined supporting structure of claim 1, wherein: support tight mechanism (5) including supporting fagging (51), sharp drive assembly (52) and mount pad (53), support fagging (51) cover and establish on bracing column (4) and with bracing column (4) are connected, mount pad (53) are fixed support the top of case (3), the one end of sharp drive assembly (52) is fixed on mount pad (53), the other end of sharp drive assembly (52) is fixed support on fagging (51).
3. The soft soil deep foundation pit combined supporting structure of claim 1, wherein: the supporting mechanism (5) comprises an auxiliary supporting assembly (54), a linear driving assembly II (55), a mounting assembly (56) and a pair of supports (57) for fixing the mounting assembly (56), the inclined supporting column (4) is positioned between the pair of supports (57), the supports (57) are fixed on the supporting box (3), and one end, far away from the supporting box (3), of each support (57) is not fixed with the front row of piles (101); installing component (56) is located on support (57) and along support (57) reciprocating slide, installing component (56) with bracing column (4) are connected and are followed bracing column (4) reciprocating slide, straight line drive assembly two (55) are fixed on installing component (56), the one end of assisting bracing subassembly (54) is supported tightly on front row stake (101), the other end cover of assisting bracing subassembly (54) is established on bracing column (4) and along bracing column (4) reciprocating slide, straight line drive assembly two (55) support tightly assist on bracing subassembly (54).
4. The soft soil deep foundation pit combined supporting structure of claim 3, wherein: assist and prop subassembly (54) including assisting fagging (541), straight dagger (542) and support kicking block (543), support kicking block (543) cover and establish on oblique dagger (4) and along oblique dagger (4) reciprocal slip, two (55) of sharp drive assembly support tightly support on kicking block (543), support kicking block (543) dorsad one side of two (55) of sharp drive assembly with straight dagger (542) is connected, straight dagger (542) is kept away from support the one end of kicking block (543) with assist fagging (541) and connect, it supports tightly to assist fagging (541) on front row stake (101).
5. The soft soil deep foundation pit combined supporting structure of claim 4, wherein: the straight supporting column (542) comprises a fixed column (5421) and a movable column (5422) which is arranged in the fixed column (5421) in a sliding mode, the fixed column (5421) is connected with the supporting block (543), the movable column (5422) is connected with the auxiliary supporting plate (541), and the fixed column (5421) and the movable column (5422) are connected through a connecting bolt (581); a plurality of first connecting holes (54211) are formed in the fixed column (5421) along the length direction of the fixed column, a plurality of second connecting holes (54221) are formed in the movable column (5422) along the length direction of the movable column, and connecting bolts (581) penetrate through the first connecting holes (54211) and the second connecting holes (54221) simultaneously.
6. The soft soil deep foundation pit combined supporting structure of claim 4, wherein: the mounting assembly (56) comprises a mounting plate (561) and sliders (562) connected to two sides of the mounting plate (561), the mounting plate (561) is sleeved on the diagonal brace (4) and slides in a reciprocating mode along the diagonal brace (4), the linear driving assembly II (55) is fixed to the mounting plate (561), the supporting blocks (543) are abutted to the mounting plate (561), and the sliders (562) are connected with the support (57) and slide in a reciprocating mode along the support (57).
7. The soft soil deep foundation pit combined supporting structure of claim 6, wherein: the support (57) comprises a main rod (571), a plurality of auxiliary rods (572) and a clamping plate (573) for fixing the mounting plate (561), the main rod (571) is obliquely arranged along the direction of the diagonal bracing column (4) and fixed on the support box (3), one end, far away from the support box (3), of the main rod (571) is not fixed with the front row of piles (101), the auxiliary rods (572) are tightly propped against the main rod (571), and one end, far away from the main rod (571), of the auxiliary rods (572) is inserted into soft soil at the bottom of the foundation pit;
the main rod (571) is provided with a sliding hole (5711) through which the sliding block (562) can pass in a matching manner, the sliding block (562) can slide along the sliding hole (5711), one side of the main rod (571) back to the mounting plate (561) is provided with a plurality of bearing plates (6) on two sides of the sliding hole (5711), the clamping plate (573) is arranged on the bearing plates (6), and the sliding block (562) is abutted against the clamping plate (573).
8. The soft soil deep foundation pit combined supporting structure of claim 1, wherein: the part of the inclined supporting column (4) located in the supporting box (3) is provided with at least one blade (7).
9. A construction method for applying the soft soil deep foundation pit combined supporting structure according to any one of claims 1 or 2, characterized in that: the method comprises the following steps:
s1, calibrating pile positions of a front row pile (101), a rear row pile (102) and a waterproof curtain pile (2) on a construction site according to construction drawings, guiding holes by a drilling machine according to the calibration position of the waterproof curtain pile (2), spraying and grouting by a jet grouting machine, and forming the waterproof curtain pile (2) after construction is completed;
s2, constructing double-row piles and pile top connecting beams (103), manufacturing pile body reinforcement cages, beginning pile drilling according to the calibration positions of front row piles (101) and rear row piles (102), placing the pile body reinforcement cages into pile holes, pouring concrete, forming the front row piles (101) and the rear row piles (102) after the concrete is solidified, arranging pile top connecting beam (103) templates between the front row piles (101) and the rear row piles (102), pouring the concrete into the pile top connecting beam (103) templates, and forming the pile top connecting beams (103) after the concrete is solidified;
s3, excavating soft soil to primarily form a foundation pit, reserving the soft soil on the side wall of the foundation pit to form a reserved soil slope (8) while excavating the soft soil, wherein the distance between the top of the reserved soil slope (8) and the bottom of the foundation pit is not less than 1/2 of the depth of the foundation pit;
s4, excavating soft soil along the periphery of the reserved soil slope (8) in the foundation pit to form a plurality of pits for accommodating the supporting boxes (3);
s5, horizontally placing the support box (3) into the pit, enabling the top of the support box (3) to be located outside the pit, backfilling a gap between the support box (3) and the pit with soil, and compacting;
s6, hoisting the diagonal brace (4) into the foundation pit, enabling one end of the diagonal brace (4) to be supported on the front row of piles (101), enabling the other end of the diagonal brace (4) to be located in the supporting box (3), and then hinging the diagonal brace (4) on the front row of piles (101);
s7, fixing a mounting seat (53) on the top of the side wall of any supporting box (3);
s8, fixing one end of the first linear driving assembly (52) on the mounting seat (53), fixing the other end of the first linear driving assembly (52) on the supporting plate (51), and starting the first linear driving assembly (52) to enable the inclined supporting column (4) to tightly support the front row of piles (101);
s9, pouring concrete into the supporting box (3) to enable the inclined supporting columns (4) to wrap the parts, located in the supporting box (3), of the concrete;
s10, stopping the first linear driving assembly (52) or the first linear driving assembly (52) from working continuously to prop against the inclined strut (4) after the concrete is solidified;
and S11, removing the reserved soil slope (8) and finishing excavation of the foundation pit.
10. A construction method for applying the soft soil deep foundation pit combined supporting structure according to any one of claims 1 and 3-7, wherein the construction method comprises the following steps: the method comprises the following steps:
s1, calibrating pile positions of a front row pile (101), a rear row pile (102) and a waterproof curtain pile (2) on a construction site according to construction drawings, guiding holes by a drilling machine according to the calibration position of the waterproof curtain pile (2), spraying and grouting by a jet grouting machine, and forming the waterproof curtain pile (2) after construction is completed;
s2, constructing double-row piles and pile top connecting beams (103), manufacturing pile body reinforcement cages, beginning pile drilling according to the calibration positions of front row piles (101) and rear row piles (102), placing the pile body reinforcement cages into pile holes, pouring concrete, forming the front row piles (101) and the rear row piles (102) after the concrete is solidified, arranging pile top connecting beam (103) templates between the front row piles (101) and the rear row piles (102), pouring the concrete into the pile top connecting beam (103) templates, and forming the pile top connecting beams (103) after the concrete is solidified;
s3, excavating soft soil to primarily form a foundation pit, reserving the soft soil on the side wall of the foundation pit to form a reserved soil slope (8) while excavating the soft soil, wherein the distance between the top of the reserved soil slope (8) and the bottom of the foundation pit is not less than 1/2 of the depth of the foundation pit;
s4, excavating soft soil along the periphery of the reserved soil slope (8) in the foundation pit to form a plurality of pits for accommodating the supporting boxes (3);
s5, horizontally placing the supporting box (3) into the pit, enabling the top of the supporting box (3) to be located outside the pit, backfilling a gap between the supporting box (3) and the pit with soil, compacting, and pouring concrete into the supporting box (3);
s6, sleeving a mounting plate (561) on an inclined strut (4), sleeving a support block (543) on the inclined strut (4), binding the mounting plate (561) and a straight strut (542) on the inclined strut (4), hoisting the inclined strut (4) into a foundation pit, supporting one end of the inclined strut (4) on a front row of piles (101), supporting the other end of the inclined strut (4) on the bottom surface of a support box (3), and hinging the inclined strut (4) on the front row of piles (101);
s7, fixing the second linear driving assembly (55) on the mounting plate (561) through bolts;
s8, uniformly inserting a plurality of auxiliary rods (572) into the reserved soil slope (8), enabling one ends of the auxiliary rods (572) to penetrate through the reserved soil slope (8) and be inserted into soft soil at the bottom of the foundation pit, and enabling the other ends of the auxiliary rods (572) to be located outside the reserved soil slope (8);
s9, hanging the main rod (571) into the foundation pit, fixing one end of the main rod (571) on the side wall of the support box (3), extending the other end of the main rod (571) to the front row of piles (101) along the diagonal brace (4) and abutting against the front row of piles (101), supporting the auxiliary rod (572) on the main rod (571), simultaneously disconnecting the mounting plate (561) from the diagonal brace (4), penetrating the sliding block (562) through the sliding hole (5711), adjusting the position of the mounting plate (561), placing the clamping plate (573) on the supporting plate (6) below the mounting plate (561), and fixing the mounting plate (561);
s10, after the length of the straight supporting rod is adjusted, a connecting bolt (581) penetrates through the connecting hole I (54211) and the connecting hole II (54221) and is screwed tightly, so that the auxiliary supporting plate (541) is abutted against the front row of piles (101), and the abutting block (543) is abutted against the inclined supporting column (4);
s11, starting the second linear driving assembly (55) to enable the second linear driving assembly (55) to push the supporting block (543) towards the front row of piles (101);
and S12, removing the reserved soil slope (8) and finishing excavation of the foundation pit.
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| CN114482075A (en) * | 2022-03-08 | 2022-05-13 | 福建省茂宏建设工程有限公司 | Basement supporting structure and construction method thereof |
| CN117947791A (en) * | 2024-03-21 | 2024-04-30 | 天津滨海新区轨道交通投资发展有限公司 | Foundation pit supporting structure and pile pressing device |
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| CN117947791A (en) * | 2024-03-21 | 2024-04-30 | 天津滨海新区轨道交通投资发展有限公司 | Foundation pit supporting structure and pile pressing device |
| CN117947791B (en) * | 2024-03-21 | 2024-05-28 | 天津滨海新区轨道交通投资发展有限公司 | Foundation pit supporting structure and pile pressing device |
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