CN215669568U

CN215669568U - Prestressed profile steel combines H shaped steel truss underground structure

Info

Publication number: CN215669568U
Application number: CN202122310256.0U
Authority: CN
Inventors: 王新海; 朱小林; 顾鹏军; 吴健; 戴政权; 戴成才
Original assignee: Jiangsu Dalongxin Construction Group Co ltd
Current assignee: Jiangsu Dalongxin Construction Group Co ltd
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-01-28
Anticipated expiration: 2031-09-23

Abstract

The utility model relates to a prestressing force shaped steel combines H shaped steel truss underground structure uses in the field of excavation supporting technology, and it includes steel sheet pile and a plurality of H shaped steel that set up along the foundation ditch periphery, and a plurality of H shaped steel all are located the steel sheet pile and are connected towards one side of foundation ditch and with the steel sheet pile, and H shaped steel surrounds into rectangular area, and is a plurality of one side of H shaped steel dorsad steel sheet pile all is equipped with the bearing piece, be provided with on the bearing piece and enclose the purlin, be equipped with a plurality of support columns in the rectangular area, the both ends of support column are equipped with prestressing force adjusting device respectively, the support column passes through prestressing force adjusting device butt is in enclose between the purlin. This application has the effect that improves foundation ditch support overall stability.

Description

Prestressed profile steel combines H shaped steel truss underground structure

Technical Field

The application relates to the field of foundation pit supporting technology, in particular to a prestressed profile steel combined H-shaped steel truss foundation pit supporting structure.

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, and can be selected according to construction conditions or reasonably combined by various supporting modes.

Chinese patent with publication number CN202559359U discloses a steel sheet pile and H-shaped steel combined foundation pit supporting structure, which comprises a steel sheet pile for stopping water in a foundation pit, H-shaped steel for retaining soil in the foundation pit, and a fastener, wherein the H-shaped steel comprises two bodies arranged in parallel and a connecting piece connecting the bodies together, the steel sheet pile is arranged outside the bodies, and the fastener is arranged between the end part of the bodies and the steel sheet pile.

Aiming at the related technologies, the inventor thinks that the steel sheet pile in the foundation pit supporting structure is easy to deform when being extruded by inclined soil, so that the whole foundation pit supporting structure is easy to deform and damage.

SUMMERY OF THE UTILITY MODEL

In order to improve the steel sheet pile and take place to warp and lead to the easy problem that takes place to warp the damage of excavation supporting structure, this application provides a prestressing force shaped steel combines H shaped steel truss excavation supporting structure.

The application provides a prestressing force shaped steel combines H shaped steel truss foundation ditch supporting construction adopts following technical scheme:

the utility model provides a prestressing force shaped steel combines H shaped steel truss underground structure, includes steel sheet pile and a plurality of H shaped steel that set up along the foundation ditch periphery, and a plurality of H shaped steel all are located steel sheet pile towards one side of foundation ditch and are connected with the steel sheet pile, and H shaped steel surrounds into rectangular region, and is a plurality of one side of H shaped steel dorsad steel sheet pile all is equipped with the bearing piece, be provided with on the bearing piece and enclose the purlin, be equipped with a plurality of support columns in the rectangular region, the both ends of support column are equipped with prestressing force adjusting device respectively, the support column passes through prestressing force adjusting device butt is in enclose between the purlin.

Through adopting above-mentioned technical scheme, cooperate through prestressing force adjusting device and support column, can support enclosing the purlin, and then support H shaped steel for H shaped steel can support tightly and support steel sheet pile more steadily on steel sheet pile, with the possibility that the steel sheet pile takes place to warp, thereby can reduce the whole foundation ditch supporting construction and take place the possibility of deformation damage.

Optionally, a connecting frame is arranged between the purlin and the prestress adjusting device, one end of the prestress adjusting device is arranged on the supporting column, and the other end of the prestress adjusting device abuts against the connecting frame.

Through adopting above-mentioned technical scheme, can reduce prestressing force adjusting device's stroke on the one hand through the link, on the other hand prestressing force adjusting device supports tightly on the link and directly not supports enclosing the purlin, can reduce because of the too big possibility that leads to enclosing the purlin damage of holding power.

Optionally, the connecting frame comprises a pair of abutting plates arranged in parallel, and a supporting plate is arranged between the pair of abutting plates; one abutting plate is connected with the surrounding purlin, and the other abutting plate abuts against the prestress adjusting device.

Through adopting above-mentioned technical scheme, the backup pad has the effect that reduces prestressing force adjusting device stroke, and prestressing force adjusting device supports tightly on the butt plate and directly not support tightly to support enclosing the purlin on enclosing the purlin simultaneously, can reduce because of the too big possibility that leads to enclosing the purlin and damage of holding power.

Optionally, the connecting frame includes a base with a triangular cross section, the base includes a first fixing plate in an L shape and a second fixing plate for fixing the first fixing plate on the purlin, the first fixing plate is fixedly connected to the second fixing plate, and the prestress adjusting device abuts against the first fixing plate.

Through adopting above-mentioned technical scheme, prestressing force adjusting device supports enclosing the purlin to tightly on the second fixed plate rather than directly supporting tightly on enclosing the purlin, can reduce because of the too big possibility that leads to enclosing the purlin damage of holding power.

Optionally, the prestress adjusting device includes a supporting block and a prestress adjusting mechanism, one end of the supporting block is connected to the supporting column, and the other end of the supporting block abuts against the connecting frame.

Through adopting above-mentioned technical scheme, under prestressing force adjustment mechanism's effect, can make the link drive the purlin of enclosing and support tightly on H shaped steel, and then make H shaped steel support tightly on the steel sheet pile to reduce the steel sheet pile and take place the possibility of warping, thereby can improve the holistic stability of foundation ditch supporting construction, in order to carry out more stable timbering to the foundation ditch. After the prestress adjusting mechanism pushes the connecting frame to abut against the enclosing purlin, a gap is generated between the supporting block and the connecting frame, the supporting block is taken as a reference to be convenient for measuring the stroke of the prestress adjusting mechanism, so that the prestress adjusting device is convenient to control to enable the strokes of the prestress adjusting devices at the two ends of the supporting column to be consistent, and the possibility of uneven stress of the connecting frames at the two sides of the supporting column can be reduced.

Optionally, a wedge-shaped cushion block is arranged between the supporting block and the connecting frame, and the wedge-shaped cushion block is abutted to the supporting block and the connecting frame at the same time.

Through adopting above-mentioned technical scheme, prestressing force adjusting device promotes the link and supports tightly on enclosing the purlin back, produce the clearance between supporting shoe and the link, insert the wedge cushion between supporting shoe and the link, and make the wedge cushion simultaneously and supporting shoe and link counterbalance tightly, can make the supporting shoe support the link, thereby multiplicable prestressing force adjusting device is to the strong point of link, make area of contact between prestressing force adjusting device and the butt board bigger, in order to reduce the too big condition that causes the link to warp because of the holding power that prestressing force adjusting device provided.

Optionally, a bearing plate is arranged below the prestress adjusting device, the bearing plate bears the prestress adjusting device, an upright post is arranged on one side of the bearing plate, which is away from the prestress adjusting device, one end of the upright post is fixed on the bearing plate, and the other end of the upright post is inserted and fixed in the ground of the foundation pit.

Through adopting above-mentioned technical scheme, through stand and bearing board bearing prestressing force adjusting device, make prestressing force adjusting device can support link and support column steadily.

Optionally, at least one web is arranged in the support column, and the web is perpendicular to the axial direction of the support column.

Through adopting above-mentioned technical scheme, the web member plays the effect that increases support column bulk strength, makes the support column can be better support the link under prestressing force adjusting device's effect.

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

1. under the action of the prestress adjusting mechanism, the connecting frame can drive the enclosing purlin to abut against the H-shaped steel, and further the H-shaped steel abuts against the steel sheet pile, so that the possibility of deformation of the steel sheet pile is reduced, the integral stability of the foundation pit supporting structure can be improved, and a foundation pit can be supported more stably;

2. the over-connecting frame can reduce the stroke of the prestress adjusting device on one hand, and the prestress adjusting device is tightly propped against the connecting frame without directly supporting the enclosing purlin on the other hand, so that the possibility of damage to the enclosing purlin caused by overlarge supporting force can be reduced;

3. the supporting block can support the connecting frame through the wedge-shaped cushion block, so that the supporting point of the connecting frame by the prestress adjusting device can be increased, and the connecting frame is more stably supported by the prestress adjusting device.

Drawings

FIG. 1 is a schematic diagram of a prestressed section steel and H-shaped steel truss foundation pit supporting structure in the embodiment of the application.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is an enlarged view of a portion B in fig. 1.

Reference numerals: 1. steel sheet piles; 2. h-shaped steel; 21. a rectangular area; 3. a bearing block; 4. enclosing purlins; 5. a support pillar; 6. a prestress adjusting device; 61. a support block; 62. a prestress adjusting mechanism; 7. a connecting frame; 71. a butt joint plate; 72. a support plate; 73. a base; 731. a first fixing plate; 732. a second fixing plate; 8. a wedge-shaped cushion block; 9. a support plate; 10. a column; 11. a web.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses prestressing force shaped steel combines H shaped steel truss underground structure. Referring to fig. 1, prestressing force shaped steel combines H shaped steel truss underground structure includes steel sheet pile 1 and a plurality of H shaped steel 2, and steel sheet pile 1 sets up along the foundation ditch periphery in succession, and a plurality of H shaped steel 2 all are located one side of steel sheet pile 1 towards the foundation ditch and set up along the foundation ditch periphery interval, and H shaped steel 2 encloses into rectangular region 21. The H-shaped steel 2 is connected with the steel sheet pile 1, and basic supporting is formed on the foundation pit through the steel sheet pile 1 and the H-shaped steel 2.

Referring to fig. 1, each H shaped steel 2 all has welded the bearing piece 3 of perpendicular to H shaped steel 2 towards one side of foundation ditch, is located and is provided with one on a plurality of bearing pieces 3 of foundation ditch with one side and encloses purlin 4, and four cross sections that enclose purlin 4 are the square, enclose the lateral wall of purlin 4 and laminate mutually with H shaped steel 2, enclose the diapire welding of purlin 4 on bearing piece 3, and bearing piece 3 is used for the fixed purlin 4 that encloses.

Referring to fig. 1 and 2, a plurality of support columns 5 are arranged in the rectangular area 21, at least one web 11 is arranged in each support column 5 along the direction perpendicular to the axis of each support column 5, and the web 11 has the function of increasing the overall strength of the support column 5. The both ends of support column 5 are equipped with prestressing force adjusting device 6 respectively, prestressing force adjusting device 6 with enclose and be equipped with link 7 between the purlin 4, the one end of link 7 is passed through the bolt and is connected with enclosing purlin 4, the other end and the prestressing force adjusting device 6 counterbalance of link 7 are tight.

The prestress adjusting device 6 comprises a prestress adjusting mechanism 62 and two supporting blocks 61, the two supporting blocks 61 are fixed at one end of the supporting column 5 close to the connecting frame 7, and one end of the supporting block 61 far away from the supporting column 5 abuts against the connecting frame 7. The prestress adjusting mechanism 62 is located between the two supporting blocks 61, one end of the prestress adjusting mechanism 62 abuts against the supporting column 5, and the other end of the prestress adjusting mechanism 62 abuts against the connecting frame 7.

The prestress adjusting mechanism 62 can be a hydraulic jack, an electric hydraulic push rod, or the like, and in this embodiment, the prestress adjusting mechanism 62 is a hydraulic jack. Firstly, the stroke of the prestress adjusting mechanism 62 is adjusted, so that the prestress adjusting mechanism 62 is abutted to the middle part of the connecting frame 7 to provide indirect supporting force for the H-shaped steel 2, a gap is formed between the connecting frame 7 and the supporting block 61 in the abutting process, and the gap can be compensated by using the wedge-shaped cushion block 8.

The wedge-shaped spacer 8 may be a rectangular steel plate of a suitable size. The wedge-shaped cushion block 8 is inserted between the supporting block 61 and the connecting frame 7, so that the supporting block 61 can support the connecting frame 7, the supporting point of the prestress adjusting device 6 on the connecting frame 7 can be increased, the contact area between the prestress adjusting device 6 and the connecting frame 7 is larger, and the deformation of the connecting frame 7 caused by overlarge supporting force is avoided. The prestress adjusting device 6 can support the connecting frame 7 more stably. In addition, after the wedge-shaped cushion block 8 is inserted, the supporting force is born by the wedge-shaped cushion block 8, so that the prestress adjusting mechanism 62 can be taken out on the premise of not influencing the supporting force, and the prestress adjusting mechanism 62 can be repeatedly used.

Referring to fig. 1 and 2, a supporting plate 9 for supporting the prestress adjusting mechanism 62 is further arranged below the prestress adjusting device 6, an upright post 10 is connected below the supporting plate 9, the upright post 10 is inserted and fixed on the ground of a foundation pit, the supporting plate 9 can form stable support for the prestress adjusting mechanism 62, the prestress adjusting mechanism 62 is always at the same horizontal height with the connecting frame 7 and the supporting column 5, and the connecting frame 7 is better supported.

Referring to fig. 2, the connecting frame 7 is composed of a pair of abutting plates 71 arranged in parallel and a pair of supporting plates 72 arranged perpendicular to the abutting plates 71, the supporting plates 72 are fixed between the pair of abutting plates 71, one abutting plate 71 is fixed on the surrounding purlin 4 through bolts, the other abutting plate 71 abuts against the prestress adjusting device 6, the prestress adjusting device 6 abuts against the abutting plates 71 and does not abut against the surrounding purlin 4 directly, and the possibility that the surrounding purlin 4 is damaged due to overlarge supporting force can be reduced. Two backup pads 72 fixed connection are between two butt plate 71, and prestressing force adjusting device 6 only need the butt on butt plate 71 just can exert thrust for enclosing purlin 4, namely plays the effect that reduces prestressing force adjusting device 6 stroke through backup pad 72.

However, the connecting frame 7 is only suitable for the case that the supporting columns 5 and the prestress adjusting devices 6 are vertically supported on the purlin 4, and is not suitable for supporting the portions of the purlin 4 at the corners of the rectangular area 21. Therefore, in order to improve the supporting effect of the purlin 4 at the corner of the rectangular area 21, a new structure of the connecting frame 7 is required.

Referring to fig. 1 and 3, another structure of the connecting frame 7 is used for supporting the portion of the surrounding purlin 4 located at the corner of the rectangular area 21, the connecting frame 7 includes a base 73 with a triangular cross section, the base 73 is composed of a first fixing plate 731 and a second fixing plate 732, the cross section of the first fixing plate 731 is L-shaped, the open end of the first fixing plate 731 is fixed on the second fixing plate 732, and the cross section of the second fixing plate 732 is rectangular and fixed on the surrounding purlin 4 through bolts. Because first fixed plate 731 cross-section is L shape, makes support column 5 and prestressing force adjusting device 6 can incline to set up between two adjacent purlins 4 and promote base 73 and support enclosing purlin 4 to improve the support effect to the position that encloses purlin 4 to be located the regional 21 corners of rectangle.

The implementation principle of the prestressed profile steel combined H-shaped steel truss foundation pit supporting structure in the embodiment of the application is as follows: cooperate through prestressing force adjustment mechanism 62 and support column 5, can support link 7 tightly on enclosing purlin 4, and then make and enclose purlin 4 and support tightly on H shaped steel 2, H shaped steel 2 supports tightly again on steel sheet pile 1 to make H shaped steel 2 can support steel sheet pile 1 more steadily, in order to reduce steel sheet pile 1 and take place the possibility of warping, make whole foundation ditch supporting construction take place to warp the possibility of damaging and can reduce.

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 prestressing force shaped steel combines H shaped steel truss underground structure, includes steel sheet pile (1) and a plurality of H shaped steel (2) that set up along the foundation ditch periphery, and a plurality of H shaped steel (2) all are located steel sheet pile (1) and are connected towards one side of foundation ditch and with steel sheet pile (1), and H shaped steel (2) surround into rectangle region (21), its characterized in that: one side of each H-shaped steel (2) back to the steel sheet pile (1) is provided with a bearing block (3), each bearing block (3) is provided with an enclosing purlin (4), a plurality of supporting columns (5) are arranged in each rectangular area (21), two ends of each supporting column (5) are respectively provided with a prestress adjusting device (6), and the supporting columns (5) are abutted between the enclosing purlins (4) through the prestress adjusting devices (6).

2. The prestressed profile steel-combined H-shaped steel truss foundation pit supporting structure according to claim 1, wherein: a connecting frame (7) is arranged between the enclosing purlin (4) and the prestress adjusting device (6), one end of the prestress adjusting device (6) is arranged on the supporting column (5), and the other end of the prestress adjusting device (6) abuts against the connecting frame (7).

3. The prestressed profile steel-combined H-shaped steel truss foundation pit supporting structure according to claim 2, wherein: the connecting frame (7) comprises a pair of abutting plates (71) which are arranged in parallel, and a supporting plate (72) is arranged between the pair of abutting plates (71); one abutting plate (71) is connected with the surrounding purlin (4), and the other abutting plate (71) is abutted with the prestress adjusting device (6).

4. The prestressed profile steel-combined H-shaped steel truss foundation pit supporting structure according to claim 2, wherein: the connecting frame (7) comprises a base (73) with a triangular cross section, the base (73) comprises a first L-shaped fixing plate (731) and a second fixing plate (732) for fixing the first fixing plate (731) on the surrounding purlin (4), the first fixing plate (731) is fixedly connected to the second fixing plate (732), and the prestress adjusting device (6) abuts against the first fixing plate (731).

5. The prestressed profiled bar-combined H-shaped steel truss foundation pit supporting structure of claim 3 or 4, wherein: the prestress adjusting device (6) comprises a supporting block (61) and a prestress adjusting mechanism (62), one end of the supporting block (61) is connected with the supporting column (5), and the other end of the supporting block (61) abuts against the connecting frame (7).

6. The prestressed profile steel-combined H-shaped steel truss foundation pit supporting structure according to claim 5, wherein: a wedge-shaped cushion block (8) is arranged between the supporting block (61) and the connecting frame (7), and the wedge-shaped cushion block (8) is tightly propped against the supporting block (61) and the connecting frame (7) at the same time.

7. The prestressed profile steel-combined H-shaped steel truss foundation pit supporting structure according to claim 2, wherein: the prestressed adjusting device is characterized in that a bearing plate (9) is arranged below the prestressed adjusting device (6), the bearing plate (9) supports the prestressed adjusting device (6), an upright column (10) is arranged on one side, deviating from the prestressed adjusting device (6), of the bearing plate (9), one end of the upright column (10) is fixed on the bearing plate (9), and the other end of the upright column (10) is inserted and fixed on the ground of the foundation pit.

8. The prestressed profile steel-combined H-shaped steel truss foundation pit supporting structure according to claim 1, wherein: at least one web plate (11) is arranged in the supporting column (5), and the web plate (11) is perpendicular to the axial direction of the supporting column (5).