New channel supporting structure close to important building structure

Abstract

The utility model relates to a newly-built channel supporting structure close to important buildings, which comprises a plurality of cast-in-situ bored piles respectively arranged on two sides of a channel, a high-pressure jet grouting pile is arranged between every two adjacent cast-in-situ bored piles, a top beam is arranged at the top of each cast-in-situ bored pile, a channel bottom lining is arranged on the bottom surface of the channel, and the channel bottom lining is arranged on the bottom surface of the channel. Hidden beams are arranged at the positions, close to the cast-in-situ bored piles, of the two sides of the channel below the channel bottom lining, the hidden beams on the two sides are connected through hidden supports arranged at intervals, and stand column piles are arranged below the middles of the hidden supports and connected with the top beams through temporary vertical inclined supports. The hidden beams and the hidden supports are arranged at the bottom of the channel, the hidden beams and the hidden supports can serve as inner supports to reduce deformation of the side wall of the channel, safety of buildings around the channel is guaranteed, the water passing section is not affected, the length of the supporting piles can be shortened on the premise that safety is guaranteed, cost is saved, and the stand column piles are arranged to guarantee that when the channel is wide, the hidden supports are stably stressed. And the safety of the channel is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of drainage channel construction, in particular to a new channel support structure adjacent to important buildings. Background Art

[0002] In order to comprehensively improve the flood control and drainage capacity of cities, many urban areas have planned and constructed a large number of drainage channels. The cross-section of drainage channels generally includes a trapezoidal cross-section formed by direct slope excavation and a rectangular cross-section formed by retaining walls or U-shaped trough structures. When the channel is adjacent to important buildings and structures, it is not appropriate to use a trapezoidal cross-section due to limited slope space; if a general retaining wall or U-shaped trough structure is used, it is still necessary to slope and excavate earth when constructing the retaining wall or U-shaped trough, which may affect the safety of the buildings and structures; if a pile retaining wall is used, since the conventional pile retaining wall is a cantilever structure, when the soft soil is thick, not only the length of the supporting piles needs to be set very long, but also the deformation of the channel side wall may still be large, posing a threat to the safety of surrounding buildings and structures. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a new channel support structure adjacent to important buildings and structures in view of the deficiencies of the above-mentioned prior art.

[0004] The utility model provides a technical solution to the above-mentioned technical problems as follows: a newly-built channel support structure adjacent to important buildings and structures, comprising a plurality of bored cast-in-place piles respectively arranged on both sides of the channel, a high-pressure rotary jet pile arranged between two adjacent bored cast-in-place piles, a crown beam arranged on the top of the bored cast-in-place piles, a channel bottom lining arranged at the bottom surface of the channel, hidden beams arranged at the positions of the bored cast-in-place piles on both sides of the channel below the channel bottom lining, the hidden beams on both sides are connected by hidden supports arranged at intervals, column piles are arranged below the middle of the hidden supports, and the column piles are connected to the crown beams by temporary vertical diagonal supports.

[0005] The beneficial effects of the utility model are as follows: the newly-built channel support structure adjacent to important buildings and structures of the utility model can serve as internal supports to reduce deformation of channel side walls and ensure the safety of buildings and structures around the channel by arranging hidden beams and hidden supports at the bottom of the channel, without affecting the water-passing section, and can also shorten the length of support piles and save costs while ensuring safety. The arranged column piles can ensure that when the channel is wider, the hidden supports are stably stressed and do not affect the safety of the channel.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows:

[0007] Further: the high-pressure jet grouting piles located between the bored cast-in-place piles are interlocked with the bored cast-in-place piles.

[0008] The beneficial effect of the above further solution is that by arranging the high-pressure jet grouting piles to interlock with each other, water and soil loss between the bored piles can be prevented, thereby ensuring the stability of the soil on both sides of the channel.

[0009] Furthermore: the lower end of the high-pressure rotary jet grouting pile extends downwardly into the channel bottom lining by 1-3m.

[0010] The beneficial effect of the above further scheme is that by extending the lower end of the high-pressure jet grouting pile downward 1-3m below the channel bottom lining, the stability of the high-pressure jet grouting pile can be ensured, thereby supporting the water and soil between the bored piles.

[0011] Further: the inner wall of the bored pile is provided with a protective surface.

[0012] The beneficial effect of the above further solution is that by providing the protective surface, the water flow in the channel can be prevented from scouring the bored piles and the soil between the piles, thereby further ensuring the stability of the soil on both sides of the channel.

[0013] Further: the protective surface is a reinforced concrete structure, and the protective surface is fixed to the inner wall of the bored pile by planting reinforcement.

[0014] The beneficial effect of the above further scheme is that the use of reinforced concrete structure can ensure the structural stability of the protective surface, and the protective surface is fixed to the inner wall of the bored pile by planting reinforcement to ensure that the protective surface and the bored pile are firmly connected, thereby playing a better supporting role.

[0015] Further: the crown beam, hidden beam and hidden support are all reinforced concrete structures, and the hidden beam is connected to the bored piles by embedded reinforcement.

[0016] The beneficial effect of the above further scheme is that by setting the hidden beams and hidden supports, the deformation of the channel side walls under the lateral pressure of the soil can be reduced, ensuring the safety of surrounding buildings and structures. Under the premise of ensuring safety, the length of the support piles can be shortened to save costs.

[0017] Furthermore: the column piles are cast-in-place piles, prefabricated piles or steel pipe piles, and the depth of the column piles buried below the channel bottom lining is not less than 5m.

[0018] The beneficial effect of the above further scheme is: by setting the column piles, the single span length of the hidden support can be reduced, making the hidden support more stable, and by controlling the depth of the column piles buried below the channel bottom lining, the support stability of the column piles can be guaranteed.

[0019] Further: the top of the column pile and the middle of the hidden support are integrally formed by pouring concrete.

[0020] The beneficial effect of the above further scheme is that by integrally forming the top of the column pile and the middle of the hidden support through concrete pouring, the connection between the column pile and the hidden support can be made firmer and the overall stability is better.

[0021] Further: the vertical diagonal brace is a steel pipe support, and both ends of the vertical diagonal brace are respectively welded to the crown beam and the column pile.

[0022] The beneficial effect of the above further scheme is that by welding the two ends of the vertical diagonal brace to the crown beam and the column pile respectively, a better supporting effect can be achieved, the deformation of the channel side wall during earth excavation can be reduced, and the safety of construction can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a support structure of a newly built channel support structure adjacent to an important building structure during earth excavation in accordance with an embodiment of the utility model;

[0024] Figure 2 A schematic cross-sectional view of a newly constructed channel support structure adjacent to an important building structure according to an embodiment of the utility model;

[0025] Figure 3 It is a schematic plan view of a newly built channel support structure adjacent to an important building structure according to an embodiment of the utility model;

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0027] 0. Channel, 1. Bored piles, 2. High-pressure rotary jet piles, 3. Crown beam, 4. Hidden beam, 5. Hidden support, 6. Column piles, 7. Channel bottom lining, 8. Surface protection, 9. Temporary vertical diagonal support. DETAILED DESCRIPTION

[0028] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0029] like Figures 1 to 3 As shown, a newly built channel support structure adjacent to an important building and structure comprises a plurality of bored cast-in-place piles 1 respectively arranged on both sides of a channel 0, a high-pressure rotary jet pile 2 is arranged between two adjacent bored cast-in-place piles 1, a crown beam 3 is arranged on the top of the bored cast-in-place pile 1, a channel bottom lining 7 is arranged at the bottom surface of the channel 0, hidden beams 4 are arranged on both sides of the channel 0 below the channel bottom lining 7 and adjacent to the bored cast-in-place piles 1, the hidden beams 4 on both sides are connected by hidden supports 5 arranged at intervals, a column pile 6 is arranged below the middle of the hidden support 5, and the column pile 6 is connected to the crown beam 3 by a temporary vertical diagonal support 9.

[0030] The newly-built channel support structure adjacent to important buildings and structures of the utility model can serve as an inner support to reduce the deformation of the side wall of the channel 7 and ensure the safety of the buildings and structures around the channel 7 by arranging the hidden beam 4 and the hidden support 5 at the bottom of the channel 7, without affecting the water-passing section, and can also shorten the length of the support piles and save costs under the premise of ensuring safety. The arranged column piles 6 can ensure that when the channel is wider, the hidden support 5 is stably stressed and does not affect the safety of the channel 7.

[0031] In one or more embodiments of the utility model, the high-pressure jet grouting piles 2 located between the bored piles 1 are interlocked with the bored piles 1. By interlocking the high-pressure jet grouting piles 2, water and soil loss between the bored piles 1 can be prevented, and the soil stability on both sides of the channel 7 can be ensured.

[0032] Optionally, in one or more embodiments of the utility model, the lower end of the high-pressure jet grouting pile 2 extends downwardly 1-3 m below the channel bottom lining 7. By extending the lower end of the high-pressure jet grouting pile 2 downwardly 1-3 m below the channel bottom lining 7, the stability of the high-pressure jet grouting pile 2 can be ensured, thereby supporting the water and soil between the bored piles 1.

[0033] Preferably, the lower end of the high-pressure jet grouting pile 2 extends downwardly into the channel bottom lining 7 by 2 m.

[0034] In one or more embodiments of the utility model, the inner wall of the bored pile 1 is provided with a protective surface 8. By providing the protective surface 8, the water flow of the channel 7 can be prevented from scouring the bored pile 1 and the soil between the piles, and the soil stability on both sides of the channel 7 can be further ensured.

[0035] In one or more embodiments of the present invention, the protective surface 8 is a reinforced concrete structure, and the protective surface 8 is fixed to the inner wall of the bored pile 1 by planting reinforcement. The use of a reinforced concrete structure can ensure the structural stability of the protective surface 8, and the protective surface 8 is fixed to the inner wall of the bored pile 1 by planting reinforcement to ensure that the protective surface 8 is firmly connected to the bored pile 1, thereby playing a better supporting role.

[0036] In one or more embodiments of the utility model, the crown beam 3, the hidden beam 4 and the hidden support 5 are all reinforced concrete structures, and the hidden beam 4 is connected to the bored pile 1 by planting steel bars. By providing the hidden beam 4 and the hidden support 5, the deformation of the side wall of the channel 7 under the lateral pressure of the soil can be reduced, the safety of the surrounding buildings can be ensured, and the length of the support pile can be shortened while ensuring safety, saving costs.

[0037] Optionally, in one or more embodiments of the utility model, the column pile 6 is a cast-in-place pile, a prefabricated pile or a steel pipe pile, and the column pile 6 is buried at a depth of not less than 5m below the channel bottom lining 7. By providing the column pile 6, the single span length of the hidden support can be reduced, so that the hidden support is more stably stressed, and by controlling the buried depth of the column pile 6 below the channel bottom lining 7, the support stability of the column pile 6 can be ensured.

[0038] In one or more embodiments of the utility model, the top of the column pile 6 and the middle of the hidden support 5 are integrally formed by concrete pouring. By integrally forming the top of the column pile 6 and the middle of the hidden support 5 by concrete pouring, the connection between the column pile 6 and the hidden support 5 can be made more firm, and the overall stability is better.

[0039] In one or more embodiments of the utility model, the vertical diagonal brace 9 is a steel pipe support, and the two ends of the vertical diagonal brace 9 are respectively welded to the crown beam 3 and the column pile 6. By respectively welding the two ends of the vertical diagonal brace 9 to the crown beam 3 and the column pile 6, a better supporting effect can be achieved, and the deformation of the side wall of the channel 7 during earth excavation can be reduced, thereby ensuring the safety of construction.

[0040] The utility model provides a new channel support structure adjacent to important buildings and structures, and the specific construction includes the following steps:

[0041] ① The site is connected and leveled, and bored piles 1, column piles 6 and high-pressure jet grouting piles 2 are constructed in sequence;

[0042] ② After the bored pile 1 reaches the designed strength, the cap beam 3 is constructed;

[0043] ③ After the crown beam 3 reaches the design strength, the slope is cut and the earthwork is excavated along the outline of the temporary vertical diagonal brace 9;

[0044] ④ Install temporary vertical diagonal braces 9 by planting reinforcement and welding steel plates;

[0045] ⑤ Continue excavating to the bottom elevation of hidden beam 4 and hidden support 5;

[0046] ⑥Construction of side wall protection 8;

[0047] ⑦Construct hidden beam 4 and hidden support 5, and connect column pile 6 with hidden support 5;

[0048] ⑧ After the hidden beam 4 and the hidden support 5 reach the design strength, cut off the temporary vertical diagonal support 9;

[0049] ⑨Construct channel bottom lining 7 and the channel construction is completed.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new channel support structure near important buildings and structures, characterized by: The invention comprises a plurality of bored cast-in-place piles (1) respectively arranged on both sides of a channel (0), a high-pressure rotary jet pile (2) being arranged between two adjacent bored cast-in-place piles (1), a crown beam (3) being arranged on the top of the bored cast-in-place piles (1), a channel bottom lining (7) being arranged at the bottom surface of the channel (0), a hidden beam (4) being arranged on both sides of the channel (0) below the channel bottom lining (7) and close to the bored cast-in-place piles (1), the hidden beams (4) on both sides being connected by hidden supports (5) arranged at intervals, a column pile (6) being arranged below the middle of the hidden support (5), and the column pile (6) being connected to the crown beam (3) by a temporary vertical diagonal support (9).

2. The new channel support structure adjacent to important buildings and structures according to claim 1 is characterized by: The high-pressure jet-jet piles (2) located between the bored cast-in-place piles (1) are interlocked with the bored cast-in-place piles (1).

3. The new channel support structure adjacent to important buildings and structures according to claim 2 is characterized by: The lower end of the high-pressure jet grouting pile (2) extends downwardly into the channel bottom lining (7) by 1-3 m.

4. The new channel support structure adjacent to important buildings and structures according to claim 1 is characterized by: The inner side wall of the bored pile (1) is provided with a protective surface (8).

5. The new channel support structure adjacent to important buildings and structures according to claim 4 is characterized by: The protective surface (8) is a reinforced concrete structure, and the protective surface (8) is fixed to the inner wall of the bored pile (1) by means of embedded reinforcement.

6. The new channel support structure adjacent to important buildings and structures according to claim 1 is characterized by: The crown beam (3), hidden beam (4) and hidden support (5) are all reinforced concrete structures, and the hidden beam (4) is connected to the bored cast-in-place pile (1) by planting reinforcement.

7. The new channel support structure adjacent to important buildings and structures according to claim 1 is characterized by: The column piles (6) are cast-in-place piles, prefabricated piles or steel pipe piles, and the column piles (6) are buried at a depth of not less than 5 m below the channel bottom lining (7).

8. The new channel support structure adjacent to important buildings and structures according to claim 7 is characterized by: The top of the column pile (6) and the middle of the hidden support (5) are integrally formed by pouring concrete.

9. The new channel support structure adjacent to important buildings and structures according to any one of claims 1 to 8, characterized in that: The vertical diagonal brace (9) is a steel pipe support, and the two ends of the vertical diagonal brace (9) are respectively welded to the crown beam (3) and the column pile (6).

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