Stress device filled between enclosure body and steel enclosing purlin and construction method of stress device

Abstract

The invention belongs to the technical field of deep foundation pit construction, and discloses a stress device filled between an enclosure body and a steel enclosing purlin and a construction method thereof.The stress device comprises a plurality of sand boxes arranged at intervals in the length direction of a gap between the enclosure body and the steel enclosing purlin, each sand box is supported between the enclosure body and the steel enclosing purlin in a length-adjustable manner; the filling hole is formed in the outer sleeve and communicates with the first cavity; the filler is injected into the first cavity through the filling hole and used for being supported between the outer sleeve and the inner sleeve in the depth direction in an abutting mode, and the first attaching face is kept to be tightly attached to the enclosure body / steel enclosing purlin, and the second attaching face is kept to be tightly attached to the steel enclosing purlin / enclosure body; and the blocking piece is used for blocking the filling hole. The stress device is arranged between the enclosure body and the steel enclosing purlin, so that the pressure of the enclosure body can be transmitted to the steel enclosing purlin through the stress device, and the stress concentration of the contact surface of the enclosure body and the steel enclosing purlin is effectively avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of deep foundation pit construction, and particularly relates to a force-bearing device filled between a protective body and a steel surrounding purlin and a construction method thereof. Background Art

[0002] The safety risks brought about by deep foundation pit construction are extremely high, and a safe and reasonable retaining support system must be adopted to ensure the safety of foundation pit construction.

[0003] Horizontal internal support is required for foundation pit excavation. The steel purlin or waist beam of the horizontal internal support must be closely connected with the vertical retaining body of the foundation pit. Since the support of the inner wall of the foundation pit is mostly achieved by purlin, before building the purlin support in the foundation pit, it is necessary to construct the retaining body first. The retaining body is formed by inserting H-shaped steel into the cement-soil mixing pile until the cement hardens. When building the purlin, the steel purlin and the retaining body should be in contact to ensure the transmission of force. The steel purlin, as the connecting part between the support and the retaining body, directly affects the whole The safety and stability of the foundation pit retaining support system; however, in the existing technology, due to construction deviation, the retaining body (ground wall, bored piles, SMW method piles) and the steel purlin are difficult to fit closely, and it is difficult to ensure the transmission of force. Moreover, the gap problem between the retaining body and the steel purlin cannot be well solved, which will lead to excessive deformation of the retaining body during excavation, and then cause a series of problems; therefore, we propose a force-bearing device filled between the retaining body and the steel purlin and its construction method to solve the above problems. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a force-bearing device filled between the enclosure and the steel purlin and a construction method thereof, which solves the problem that there is a gap between the enclosure and the steel purlin, resulting in difficulty in close fitting.

[0005] The present invention is implemented by the following scheme: a force-bearing device filled between the enclosure and the steel purlin, comprising:

[0006] A plurality of sand boxes are arranged at intervals along the length direction of the gap between the enclosure and the steel enclosure purlin, and each of the sand boxes is supported between the enclosure and the steel enclosure purlin with an adjustable length; each of the sand boxes comprises an outer sleeve and an inner sleeve, one end of the outer sleeve is provided with a first cavity, and the other end is provided with a first surface that is closely attached to the enclosure / steel enclosure purlin, one end of the inner sleeve is inserted into the first cavity with an adjustable depth, and the other end is provided with a second surface that is closely attached to the steel enclosure purlin / enclosure, and the inner sleeve is adapted to the first cavity;

[0007] A filling hole is formed on the outer sleeve and communicated with the first cavity;

[0008] A filler is injected into the first cavity through the filling hole, and is used to support between the outer sleeve and the inner sleeve in the depth direction, and to maintain the first veneer in close contact with the enclosure / steel enclosure purlin, and the second veneer in close contact with the steel enclosure purlin / enclosure; and

[0009] A sealing member is used to seal the filling hole.

[0010] A further improvement of the force-bearing device filled between the retaining body and the steel purlin of the present invention is that the retaining body includes a cement-soil mixing pile formed on the inner wall of the foundation pit and a plurality of H-shaped steels fixed on the cement-soil mixing piles and corresponding to a plurality of sand boxes respectively, one end of the plurality of H-shaped steels is embedded in the cement-soil mixing pile, and the other end extends out of the cement-soil mixing pile and faces the steel purlin, and the first veneer / second veneer on the plurality of sand boxes is respectively tightly attached to a side of the corresponding plurality of H-shaped steels facing the steel purlin.

[0011] A further improvement of the force-bearing device filled between the enclosure and the steel purlin of the present invention is that the size of the first veneer / second veneer closely attached to the H-shaped steel is larger than the size of the closely attached side of the H-shaped steel.

[0012] A further improvement of the force-bearing device filled between the enclosure and the steel enclosure purlin of the present invention is that the outer sleeve includes an outer cylinder with openings at both ends and a first sealing plate that seals an opening at one end of the outer cylinder, the first cavity is formed inside the outer cylinder and communicates with the opening at the other end, and the first facing is formed on the outer surface of the first sealing plate;

[0013] The inner sleeve comprises an inner cylinder body inserted into the first cavity, a side of the inner cylinder body facing the first sealing plate is formed with an insertion surface for supporting the filler, and the second facing surface is formed on a side of the inner cylinder body facing away from the first sealing plate.

[0014] A further improvement of the force-bearing device filled between the enclosure and the steel enclosure purlin of the present invention is that the inner sleeve further comprises a first opening opened at one end of the inner cylinder, a second opening opened at the other end of the inner cylinder and a second sealing plate blocking the first opening / second opening of the inner cylinder, the second facing of the inner cylinder is formed on the outer surface of the second sealing plate, and a second cavity communicating with the first opening and the second opening is formed inside the inner cylinder;

[0015] When the inner cylinder is inserted into the first cavity, the second cavity is connected with the first cavity through the second opening / first opening to form a common cavity, and the inner cylinder is provided with a filling port for connecting the filling hole to the common cavity when the first veneer is in close contact with the enclosure / steel purlin and the second veneer is in close contact with the steel purlin / enclosure.

[0016] A further improvement of the force-bearing device filled between the enclosure and the steel purlin of the present invention is that the filling hole is located on a side close to the first sealing plate, and the filling port is open toward a side of the first sealing plate and is U-shaped.

[0017] A construction method for a force-bearing device filled between a protective body and a steel purlin comprises the following steps:

[0018] S1. Provide the force-bearing device as described above;

[0019] S2. Provide a plurality of sand boxes, and support the gap between the enclosure and the steel purlin at intervals along the length direction of the gap between the enclosure and the steel purlin. The supporting method of each sand box is:

[0020] Make the first surface of the sand box closely attached to the steel purlin / enclosure, pull out the inner sleeve along the first cavity, and make the second surface closely attached to the enclosure / steel purlin;

[0021] Filling the first cavity with a filler through the filling hole to support between the outer sleeve and the inner sleeve, and to maintain the first surface in close contact with the steel purlin / enclosure, and the second surface in close contact with the enclosure / steel purlin;

[0022] The filling hole is then sealed with a sealing member.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention arranges the force-bearing device between the enclosure and the steel purlin, and the two end faces thereof are respectively in close contact with the enclosure and the steel purlin, so that the pressure of the enclosure can be transmitted to the steel purlin through the force-bearing device, thereby effectively avoiding stress concentration on the contact surface between the enclosure and the steel purlin.

[0025] 2. The present invention controls the depth of the inner sleeve inserted into the first cavity. A filling hole is left on the upper part of the outer sleeve, and different volumes of fillers are injected into the first cavity through the filling hole to adjust the length of the sand box, thereby solving the problem of different gap sizes between the enclosure and the steel purlin, and making the steel purlin transmit force evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The schematic diagram of the installation position of the sand box of the present invention is shown.

[0027] Figure 2 A schematic diagram of an application example of the present invention is shown.

[0028] Figure 3 The schematic diagram of the sand box structure of the present invention is shown.

[0029] Figure 4 A schematic diagram of the structure of the inner sleeve of the present invention is shown.

[0030] Figure 5 The schematic diagram of the outer sleeve structure of the present invention is shown.

[0031] In the figure: 1. enclosure; 101. cement-soil mixing pile; 102. H-shaped steel; 2. steel purlin; 3. sand box; 301. outer cylinder; 302. inner cylinder; 303. second cavity; 304. first cavity; 4. tripod-shaped corbel; 5. first closing plate; 6. second closing plate; 7. sealing member; 8. filling port. DETAILED DESCRIPTION

[0032] In order to solve the problem that there is a gap between the enclosure and the steel purlin, which makes it difficult to fit them tightly, the present invention provides a force-bearing device filled between the enclosure and the steel purlin and a construction method thereof. The force-bearing device filled between the enclosure and the steel purlin and a construction method thereof are further described below with specific embodiments combined with the accompanying drawings.

[0033] See also Figure 1 to Figure 5 As shown, a force-bearing device filled between the enclosure and the steel purlin comprises:

[0034] A plurality of sand boxes 3 are arranged at intervals along the length direction of the gap between the enclosure 1 and the steel enclosure purlin 2, and each sand box 3 is supported between the enclosure 1 and the steel enclosure purlin 2 with adjustable length; each sand box 3 includes an outer sleeve and an inner sleeve, one end of the outer sleeve is provided with a first cavity 304, and the other end is formed with a first veneer closely attached to the enclosure 1 / steel enclosure purlin 2, one end of the inner sleeve is inserted into the first cavity 304 with adjustable depth, and the other end is formed with a second veneer closely attached to the steel enclosure purlin 2 / enclosure 1, and the inner sleeve is adapted to the first cavity 304;

[0035] A filling hole is provided on the outer sleeve and communicates with the first cavity 304;

[0036] The filler is injected into the first cavity 304 through the filling hole, and is used to support between the outer sleeve and the inner sleeve in the depth direction, and to maintain the first veneer in close contact with the enclosure 1 / steel enclosure purlin 2, and the second veneer in close contact with the steel enclosure purlin 2 / enclosure 1; and

[0037] The sealing member 7 is used to seal the filling hole.

[0038] Specifically, in this embodiment, the sealing member 7 is a bolt and the filling hole is a screw hole. The sealing member 7 is screwed into the filling hole and can be used to block the filling hole. The filler can be sand. Different volumes (amounts) of sand are injected into the first cavity 304 through the filling hole to control the depth of the inner sleeve inserted into the first cavity 304, so as to adjust the length of the sand box 3. Figure 1 As shown, a tripod-shaped corbel 4 for supporting the steel purlin 2 is fixed on the enclosure 1, and the structure also provides support for the initial placement of the sand box 3.

[0039] Among them, see Figure 2 As shown, the retaining body 1 includes a cement-soil mixing pile 101 formed on the inner wall of the foundation pit and a plurality of H-shaped steels 102 fixed on the cement-soil mixing pile 101 and corresponding to a plurality of sand boxes 3 respectively. One end of the plurality of H-shaped steels 102 is embedded in the cement-soil mixing pile 101, and the other end extends out of the cement-soil mixing pile 101 and faces the steel perimeter purlin 2. The first veneer / second veneer on the plurality of sand boxes 3 is respectively tightly attached to a side of the corresponding plurality of H-shaped steels 102 facing the steel perimeter purlin 2.

[0040] The H-shaped steel 102 is used as the main stress member of the enclosure 1 to improve the strength of the enclosure 1. The first veneer / second veneer is in close contact with the side of the H-shaped steel 102 facing the steel purlin 2, so that several sand boxes 3 can be in close contact with several H-shaped steels 102 respectively, which can better transmit force.

[0041] Among them, see Figure 2 As shown, the size of the first veneer / second veneer closely attached to the H-shaped steel 102 is larger than the size of the closely attached side of the H-shaped steel 102 .

[0042] By adopting the above design, the first veneer / the second veneer can be mainly in close contact with the H-shaped steel 102, and its edge area can also be in close contact with the cement-soil mixing pile 101, so as to improve the force transmission effect.

[0043] Among them, see Figure 3-5 As shown, the outer sleeve includes an outer cylinder 301 with openings at both ends and a first sealing plate 5 that seals an opening at one end of the outer cylinder 301. The first cavity 304 is formed inside the outer cylinder 301 and communicates with the opening at the other end. The first facing is formed on the outer surface of the first sealing plate 5.

[0044] The inner sleeve includes an inner cylinder 302 inserted into the first cavity 304, and an insertion surface for supporting the filler is formed on a side of the inner cylinder 302 facing the first sealing plate 5, and a second facing surface is formed on a side of the inner cylinder 302 facing away from the first sealing plate 5;

[0045] The inner sleeve further includes a first opening at one end of the inner cylinder 302, a second opening at the other end of the inner cylinder 302, and a second sealing plate 6 blocking the first opening / second opening of the inner cylinder 302. The second facing surface of the inner cylinder 302 is formed on the outer surface of the second sealing plate 6. A second cavity 303 communicating with the first opening and the second opening is formed inside the inner cylinder 302.

[0046] When the inner cylinder 302 is inserted into the first cavity 304, the second cavity 303 is connected with the first cavity 304 through the second opening / first opening to form a common cavity, and a filling port 8 is provided on the inner cylinder 302 for connecting the filling hole to the common cavity when the first veneer is in close contact with the enclosure 1 / steel purlin 2 and the second veneer is in close contact with the steel purlin / 2 enclosure 1.

[0047] When the sand box 3 is placed in the gap between the enclosure 1 and the steel purlin 2, the first surface is in close contact with the steel purlin 2 / enclosure 1, the second surface is in close contact with the enclosure 1 / steel purlin 2, and the end of the inner cylinder 302 with the filling port 8 is in close contact with the first sealing plate 5, the filling material can be filled into the common cavity through the filling hole and the filling port 8 to support the first sealing plate 5 and the second sealing plate 6, and then the filling hole is blocked with a sealing member to achieve the sand box 3 being supported between the enclosure 1 and the steel purlin 2.

[0048] The filling hole is located on a side close to the first sealing plate 5 , and the filling port 8 is opened toward a side of the first sealing plate 5 and is U-shaped.

[0049] By adopting the above design, the sand box 3 of the present invention can be well able to inject fillers into the common cavity from the filling hole and the filling port 8 in sequence when adjusting the overall length of the sand box 3 .

[0050] A construction method for a force-bearing device filled between a protective body and a steel purlin comprises the following steps:

[0051] S1. Provide the force-bearing device as described above;

[0052] S2. Provide a plurality of sand boxes 3, and support the gap between the enclosure 1 and the steel purlin 2 in the gap between the enclosure 1 and the steel purlin 2 in sequence and at intervals along the length direction of the gap between the enclosure 1 and the steel purlin 2. The supporting method of each sand box 3 is:

[0053] Make the first surface of the sand box 3 closely attached to the steel purlin 2 / enclosure 1, pull out the inner sleeve along the first cavity 304, and make the second surface closely attached to the enclosure 1 / steel purlin 2;

[0054] Fill the first cavity 304 with filler through the filling hole to support between the outer sleeve and the inner sleeve, and maintain the first surface in close contact with the steel purlin 2 / enclosure 1, and the second surface in close contact with the enclosure 1 / steel purlin 2;

[0055] The filling hole is then sealed with a sealing member 7 .

[0056] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0057] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A force-bearing device filled between the enclosure and the steel purlin, characterized in that: include: A plurality of sand boxes are arranged at intervals along the length direction of the gap between the enclosure and the steel enclosure purlin, and each of the sand boxes is supported between the enclosure and the steel enclosure purlin with an adjustable length; each of the sand boxes comprises an outer sleeve and an inner sleeve, one end of the outer sleeve is provided with a first cavity, and the other end is provided with a first surface that is closely attached to the enclosure / steel enclosure purlin, one end of the inner sleeve is inserted into the first cavity with an adjustable depth, and the other end is provided with a second surface that is closely attached to the steel enclosure purlin / enclosure, and the inner sleeve is adapted to the first cavity; A filling hole is formed on the outer sleeve and communicated with the first cavity; A filler is injected into the first cavity through the filling hole, and is used to support between the outer sleeve and the inner sleeve in the depth direction, and to maintain the first veneer in close contact with the enclosure / steel enclosure purlin, and the second veneer in close contact with the steel enclosure purlin / enclosure; as well as A sealing member is used to seal the filling hole.

2. The force-bearing device filled between the enclosure and the steel purlin as claimed in claim 1, characterized in that: The retaining body includes a cement-soil mixing pile formed on the inner wall of the foundation pit and a plurality of H-shaped steels fixed on the cement-soil mixing piles and corresponding to a plurality of sand boxes respectively. One end of the plurality of H-shaped steels is embedded in the cement-soil mixing pile, and the other end extends out of the cement-soil mixing pile and faces the steel surrounding purlin. The first veneer / second veneer on the plurality of sand boxes is respectively tightly attached to a side of the corresponding plurality of H-shaped steels facing the steel surrounding purlin.

3. The force-bearing device filled between the enclosure and the steel purlin as claimed in claim 2 is characterized in that: The size of the first veneer / the second veneer which is in close contact with the H-shaped steel is larger than the size of the side of the H-shaped steel which is in close contact with.

4. The force-bearing device filled between the enclosure and the steel purlin as claimed in claim 1, characterized in that: The outer sleeve comprises an outer cylinder with openings at both ends and a first sealing plate that seals an opening at one end of the outer cylinder, the first cavity is formed inside the outer cylinder and communicates with the opening at the other end, and the first facing is formed on the outer surface of the first sealing plate; The inner sleeve comprises an inner cylinder body inserted into the first cavity, a side of the inner cylinder body facing the first sealing plate is formed with an insertion surface for supporting the filler, and the second facing surface is formed on a side of the inner cylinder body facing away from the first sealing plate.

5. The force-bearing device filled between the enclosure and the steel purlin as claimed in claim 4 is characterized in that: The inner sleeve further comprises a first opening at one end of the inner cylinder, a second opening at the other end of the inner cylinder and a second sealing plate blocking the first opening / second opening of the inner cylinder, the second facing surface of the inner cylinder is formed on the outer surface of the second sealing plate, and a second cavity communicating with the first opening and the second opening is formed inside the inner cylinder; When the inner cylinder is inserted into the first cavity, the second cavity is connected with the first cavity through the second opening / first opening to form a common cavity, and the inner cylinder is provided with a filling port for connecting the filling hole to the common cavity when the first veneer is in close contact with the enclosure / steel purlin and the second veneer is in close contact with the steel purlin / enclosure.

6. The force bearing device filled between the enclosure and the steel purlin as claimed in claim 5 is characterized in that: The filling hole is located on a side close to the first sealing plate, and the filling port is opened toward a side of the first sealing plate and is U-shaped.

7. A construction method for a force-bearing device filled between a protective body and a steel purlin, characterized in that: The following steps are involved: S1. Provide a force bearing device as claimed in claim 1; S2. Provide a plurality of sand boxes, and support the gap between the enclosure and the steel purlin at intervals along the length direction of the gap between the enclosure and the steel purlin. The supporting method of each sand box is: Make the first surface of the sand box closely attached to the steel purlin / enclosure, pull out the inner sleeve along the first cavity, and make the second surface closely attached to the enclosure / steel purlin; Filling the first cavity with a filler through the filling hole to support between the outer sleeve and the inner sleeve, and to maintain the first surface in close contact with the steel purlin / enclosure, and the second surface in close contact with the enclosure / steel purlin; The filling hole is then sealed with a sealing member.

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