CN215630019U

CN215630019U - Cantilever type combined support using deep-digging foundation pit

Info

Publication number: CN215630019U
Application number: CN202122290795.2U
Authority: CN
Inventors: 杨庆; 韩广远; 王生涛; 孟晓冬; 冯东东; 夏欢欢; 王崇伟
Original assignee: Anhui Road and Bridge Engineering Co Ltd
Current assignee: Anhui Road and Bridge Engineering Co Ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2022-01-25
Anticipated expiration: 2031-09-22

Abstract

The utility model relates to the technical field of deep foundation pit supporting structures, in particular to a cantilever type combined support applying a deep foundation pit, which comprises a combined support assembly, wherein the combined support assembly comprises a plurality of groups of equidistantly distributed SMW construction piles and equal-thickness walls, H-shaped steel is embedded in the groups of equidistantly distributed SMW construction piles, a supporting and limiting device is arranged on the outer surface of the H-shaped steel close to the top end, a protective baffle is arranged on the rear side of the supporting and limiting device, the combined support assembly is positioned in a foundation pit soil layer, the structure of the existing SMW construction piles is improved through the arranged combined support assembly, the structure with the equal-thickness walls can improve the self-stability by utilizing the contact area between the structure with the foundation pit soil layer, the deformation and bending of the single SMW construction pile caused by excessive mechanical excavation in the subsequent excavation process of the foundation pit can be effectively avoided, and the soil layer on the top surface of the foundation pit soil layer is reinforced, so that the soil layer around the top surface of the foundation pit can be prevented from being separated.

Description

Cantilever type combined support using deep-digging foundation pit

Technical Field

The utility model relates to the technical field of deep foundation pit supporting structures, in particular to a cantilever type combined support applying a deep-dug foundation pit.

Background

The deep foundation pit support is a measure of supporting, reinforcing and protecting a deep foundation pit side wall and a surrounding environment in order to ensure the safety of underground structure construction and the surrounding environment of a foundation pit, and at present, the following four methods are actually adopted in the foundation pit support: the deep mixing cement soil enclosure wall is formed by forcibly mixing soil and input cement paste in situ by adopting a deep mixer to form a continuously lapped cement soil columnar reinforced retaining wall; and the channel steel sheet pile is a simple steel sheet combined retaining wall and is formed by overlapping channel steel in a positive and negative buckling mode or in parallel, the channel steel is 6-8 m long, the model is determined by calculation, and a pull anchor or a support is arranged at the position, close to the ground, of the top of the underground driven person. Because the lap joint is not tight, water can not be completely stopped generally, if the underground water level is high, the underground water level can be reduced by using a light well point when needed, and the water stopping device is generally only used for small-sized projects; thirdly, before foundation pit excavation, the underground continuous wall is a concrete wall in underground soil formed by excavating deep grooves below the slurry retaining wall by using special grooving equipment and then pouring concrete by using a lower reinforcement cage; the SMW construction method is the most common three-shaft type drilling and digging mixer, wherein a drill rod is used for cohesive soil and gravel soil and bedrock, other machine types are developed and used for construction under urban viaducts and the like, occasions with limited space, or seabed wall building, or weak foundation reinforcement, meanwhile, in recent years, with the rapid increase of engineering construction and the requirement of development of circular economy, cantilever type SMW construction method pile support is widely applied, but a large number of problems still exist in practical application of cantilever type SMW construction method pile support.

Firstly, the stability of the SMW construction method pile needs to be improved, deformation is easy to occur when a foundation pit is dug, secondly, soil outside the pit easily flows into the foundation pit from between H-shaped steel, so that the foundation pit is raised, the foundation pit is unstable, and finally, the H-shaped steel 4 is easy to be arranged in a full position and a half position, so that the integral rigidity of the combined member is difficult to determine.

Therefore, it is necessary to design a cantilever type combined support using a deep-excavated foundation pit to solve the above-mentioned problems in the background art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a cantilever type combined support applying a deep-dug foundation pit, which aims to solve the problems in the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides an use cantilever type combination of deep-cutting foundation ditch to strut, includes the combination and struts the assembly, the combination is strutted the assembly and is included a plurality of sets of the SMW worker method stake and the uniform thickness wall that distribute of equidistance, and the inside of a plurality of sets of the SMW worker method stake that distribute of equidistance all imbeds and has placed H shaped steel, and the surface of H shaped steel is close to top department and is provided with the support stop device, and the rear side that supports stop device simultaneously is provided with protective baffle, and the combination is strutted the assembly and is located the inside of foundation ditch soil layer simultaneously.

According to the preferable scheme of the utility model, the top surface of the equal-thickness wall is provided with an embedded groove, the bottom end of the protective baffle is positioned in the embedded groove, and the equal-thickness wall and a plurality of groups of SMW construction method piles distributed at equal intervals are integrally formed by adopting a cement-soil mixture.

As a preferable scheme of the utility model, a bubble level meter is fixedly arranged on one side surface of the H-shaped steel close to the top end, and the release agents are uniformly coated on the outer surfaces of the H-shaped steel and the protective baffle.

As a preferable scheme of the utility model, the supporting and limiting device comprises a first L-shaped bracket, a second L-shaped bracket, a connecting fixing rod and a correcting mechanism, wherein the first L-shaped bracket and the second L-shaped bracket are vertically and symmetrically distributed on two sides of the H-shaped steel, and the connecting fixing rod penetrates through the first L-shaped bracket, the second L-shaped bracket and the inside of the H-shaped steel.

As a preferable scheme of the utility model, the connecting and fixing rod, the first L-shaped bracket and the second L-shaped bracket are fixedly installed through fixing nuts, and the connecting and fixing rod is welded with the H-shaped steel.

As a preferable scheme of the utility model, the correcting mechanism comprises an upper rotating handle, a lower supporting foot and a screw rod, the upper rotating handle and the lower supporting foot are fixedly connected through the screw rod, the screw rod spirally penetrates through the interiors of the first L-shaped support and the second L-shaped support, and meanwhile, the screw rod and the connecting fixing rod are vertically arranged.

Compared with the prior art, the utility model has the beneficial effects that:

1. in the utility model, the structure of the pile in the existing SMW construction method is improved by the arranged combined supporting assembly, the system is more scientific, the structure with the equal thick wall can improve the self stability by utilizing the contact area between the pile and the foundation pit soil layer on one hand, can effectively avoid the deformation and bending of the single pile in the SMW construction method caused by excessive mechanical digging in the subsequent digging process of the foundation pit, and can reinforce the top soil layer of the foundation pit, can prevent soil layers around the top surface of the foundation pit from being separated, and can obstruct soil outside the pit by utilizing the additionally arranged protective baffle plate to prevent the soil from flowing into the foundation pit from between the H-shaped steel to cause the uplift of the foundation pit and the instability of the foundation pit, meanwhile, the supporting and limiting device has a limiting function, so that the uniform embedding depth of each group of H-shaped steel is facilitated, and the standard is reached, and the integral rigidity of the combined member is difficult to determine when the H-shaped steel is arranged in a full position and a half position.

2. According to the utility model, the H-shaped steel has a self-checking leveling function through the arranged bubble level meter, and the H-shaped steel can be finely adjusted by combining the correcting mechanism, so that the supporting and limiting device is multifunctional, the mechanical leveling can be realized, the H-shaped steel is effectively prevented from inclining in the SMW construction method pile with higher softness, and the embedding verticality is ensured.

3. In the utility model, the first L-shaped bracket, the second L-shaped bracket, the connecting fixing rod and the supporting and limiting device of the fixing nut structure are arranged, so that the first L-shaped bracket, the second L-shaped bracket, the connecting fixing rod and the supporting and limiting device are convenient to disassemble and assemble.

Drawings

FIG. 1 is a schematic top perspective external view of the integrated assembly of the present invention;

FIG. 2 is a schematic view of the overall expanded top perspective external structure of the present invention;

FIG. 3 is a schematic top perspective enlarged view of the modular support assembly of the present invention;

FIG. 4 is a schematic view of an enlarged top perspective structure of the supporting and limiting device of the present invention;

FIG. 5 is a schematic view of the internal structure of the integral installation front plane in the present invention;

in the figure: 1. a combined supporting assembly; 2. carrying out SMW construction method piles; 3. equal thick wall; 31. a groove is embedded; 4. h-shaped steel; 41. a bubble level; 5. a supporting and limiting device; 51. a first L-shaped bracket; 52. a second L-shaped bracket; 53. connecting a fixed rod; 531. fixing a nut; 54. a correction mechanism; 541. an upper rotating handle; 542. a lower supporting leg; 543. a screw; 6. a protective baffle; 7. and (6) a foundation pit soil layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution:

a cantilever type combined support applied to a deep excavation foundation pit comprises a combined support assembly 1, wherein the combined support assembly 1 comprises a plurality of groups of SMW construction method piles 2 and equal-thickness walls 3 which are distributed equidistantly, H-shaped steel 4 is embedded in the groups of the SMW construction method piles 2 which are distributed equidistantly, a supporting and limiting device 5 is arranged on the outer surface of the H-shaped steel 4 close to the top end, a protective baffle 6 is arranged on the rear side of the supporting and limiting device 5, meanwhile, the combined support assembly 1 is positioned in a foundation pit soil layer 7, the structure of the existing SMW construction method piles 2 is improved through the arranged combined support assembly 1, the system is more scientific, the structure with the equal-thickness walls 3 is utilized, on one hand, the contact area between the combined support assembly and the foundation pit soil layer 7 is utilized to improve the self stability, the deformation and bending of the single SMW construction method pile 2 caused by excessive mechanical excavation in the subsequent excavation process of the foundation pit can be effectively avoided, on the other hand can consolidate 7 top surface soil layers of foundation ditch soil layer, can prevent that foundation ditch top surface soil layer all around from taking place to break away from, and utilize the guard flap 6 of addding to carry out the separation to the soil body outside the hole, prevent it from flowing into in the foundation ditch from between the H shaped steel, cause the foundation ditch uplift, foundation ditch unstability, support stop device 5 through setting up has limit function simultaneously, the embedding degree of depth of every group H shaped steel 4 of help is unified, and up to standard, lead to the combined member integral rigidity to be difficult to confirm when avoiding H shaped steel 4 to appear "full position" and "half position" to arrange.

In the embodiment, referring to fig. 2, 3 and 4, an embedded groove 31 is formed in the top surface of the equal-thickness wall 3, the bottom end of the protective baffle 6 is located inside the embedded groove 31, and the equal-thickness wall 3 and a plurality of groups of piles 2 distributed at equal intervals in the SMW construction method are integrally formed by using a cement-soil mixture; a bubble level meter 41 is fixedly arranged on one side surface of the H-shaped steel 4 close to the top end, and release agents are uniformly coated on the outer surfaces of the H-shaped steel 4 and the protective baffle 6; support stop device 5 including first L type support 51, second L type support 52, connect dead lever 53 and aligning gear 54, and first L type support 51, second L type support 52 is the both sides of vertical symmetric distribution at H shaped steel 4, connect dead lever 53 simultaneously and run through first L type support 51, the inside of second L type support 52 and H shaped steel 4, can make H shaped steel 4 have the horizontal function of self-checking through the bubble spirit level 41 that sets up, can combine aligning gear 54 to finely tune H shaped steel 4, thereby can make support stop device 5 reach multi-functionally, can accomplish mechanical level correction, and then effectually prevent that H shaped steel 4 from being in the higher inside slope condition that takes place of SMW worker method stake 2 of softness, guarantee that its embedding is perpendicular.

In an embodiment, referring to fig. 4, the connecting fixing rod 53, the first L-shaped bracket 51 and the second L-shaped bracket 52 are both fixedly installed through a fixing nut 531, and the connecting fixing rod 53 is welded to the H-shaped steel 4; the correcting mechanism 54 comprises an upper rotating handle 541, a lower supporting foot 542 and a screw 543, the upper rotating handle 541 and the lower supporting foot 542 are fixedly connected through the screw 543, meanwhile, the screw 543 spirally penetrates through the inside of the first L-shaped support 51 and the second L-shaped support 52, meanwhile, the screw 543 and the connecting fixing rod 53 are vertically arranged, and the first L-shaped support 51, the second L-shaped support 52 and the supporting limiting device 5 connected with the fixing rod 53 and the fixing nut 531 are arranged to be convenient to detach and install additionally.

The working principle is as follows: during installation, a triaxial drilling and digging mixer is started to drill a pile pit in a foundation pit soil layer 7 by using a drill rod, an excavator is used for digging a wall pit at the top surface of the foundation pit soil layer 7 close to the top end of the pile pit at the same time, after a certain depth is reached, a cement system reinforcer is arranged at a drill bit and is repeatedly mixed and stirred with foundation soil to form a primary SMW construction method pile 2 and an equal-thickness wall 3, the equal-thickness wall 3 is positioned on the top surface of the foundation pit soil layer 7 to be quickly formed, a worker can insert a protective baffle 6 into the top surface of the equal-thickness wall 3 before the H-shaped steel 4 is embedded into the top surface of the SMW construction method pile 2 and is positioned at the rear side of the SMW construction method pile 2, meanwhile, the H-shaped steel 4 can be gradually embedded into the SMW construction method pile 2 before the SMW construction method pile 2 is not hardened until the bottom surface of a lower supporting leg 542 is attached to the top surface of the equal-thickness wall 3, the worker can judge that the H-shaped steel 4 is inclined or displaced by using a bubble level gauge 41, if the standard is not met, the screw rod 543 is spirally rotated on the first L-shaped support 51 and the second L-shaped support 52 by rotating the upper rotating handle 541, the position of the H-shaped steel 4 in the SMW construction method pile 2 is adjusted by adjusting the placing states of the first L-shaped support 51 and the second L-shaped support 52 until the standard is met, the structure of the existing SMW construction method pile 2 is improved by the arranged combined supporting assembly 1, the system is more scientific, the structure with the added thick wall 3 can improve the stability of the structure by utilizing the contact area between the structure and the foundation pit soil layer 7 on one hand, the deformation and bending of the single SMW construction method pile 2 caused by excessive mechanical excavation in the subsequent excavation process of the foundation pit can be effectively avoided, on the other hand, the top soil layer of the foundation pit soil layer 7 can be reinforced, the soil layer around the top surface of the foundation pit can be prevented from being separated, and the soil outside the pit can be blocked by utilizing the added protective baffle 6, prevent the H-shaped steel from flowing into a foundation pit from the space between the H-shaped steel to cause the uplift of the foundation pit and the instability of the foundation pit, simultaneously, the supporting and limiting device 5 has a limiting function to help the embedded depth of each group of H-shaped steel 4 to be uniform and reach the standard, and avoid the situation that the integral rigidity of a combined component is difficult to determine when the H-shaped steel 4 is arranged in a full position and a half position, meanwhile, the H-shaped steel 4 can have a self-checking horizontal function through the arranged bubble level gauge 41, the H-shaped steel 4 can be finely adjusted by combining with the correcting mechanism 54, so that the supporting and limiting device 5 can achieve multiple functions and mechanical horizontal correction, further, the H-shaped steel 4 is effectively prevented from inclining inside the SMW construction method pile 2 with higher softness, the embedding is ensured to be vertical, and the supporting and limiting device 5 comprising the first L-shaped bracket 51, the second L-shaped bracket 52, the connecting fixing rod 53 and the fixing nut 531 is convenient to disassemble and assemble, has certain popularization value.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an use cantilever type combination support of deep-cut foundation ditch, includes combination support assembly (1), its characterized in that: the combined supporting assembly (1) comprises a plurality of groups of SMW construction method piles (2) and equal-thickness walls (3) which are distributed at equal intervals, H-shaped steel (4) is embedded into the groups of SMW construction method piles (2) which are distributed at equal intervals, a supporting and limiting device (5) is arranged on the outer surface of the H-shaped steel (4) close to the top end, a protective baffle (6) is arranged on the rear side of the supporting and limiting device (5), and the combined supporting assembly (1) is located inside a foundation pit soil layer (7).

2. The cantilever type combined support for the deep-dug foundation pit is applied to the cantilever type combined support according to claim 1, and is characterized in that: when thick wall (3) top surface be provided with embedded groove (31), and guard flap (6) bottom is located the inside of embedded groove (31), simultaneously when thick wall (3) and a plurality of group's SMW worker method stake (2) of equidistance distribution adopt soil cement mixture integrated into one piece.

3. The cantilever type combined support for the deep-dug foundation pit is applied to the cantilever type combined support according to claim 1, and is characterized in that: a bubble level gauge (41) is fixedly mounted on one side face of the H-shaped steel (4) close to the top end, and release agents are uniformly coated on the outer surfaces of the H-shaped steel (4) and the protective baffle (6).

4. The cantilever type combined support for the deep-dug foundation pit is applied to the cantilever type combined support according to claim 1, and is characterized in that: support stop device (5) including first L type support (51), second L type support (52), connect dead lever (53) and aligning gear (54), and first L type support (51), second L type support (52) are perpendicular symmetric distribution in the both sides of H shaped steel (4), connect the inside that dead lever (53) run through first L type support (51), second L type support (52) and H shaped steel (4) simultaneously.

5. The cantilever type combined support for the deep-dug foundation pit is applied to the cantilever type combined support according to claim 4, and is characterized in that: the connecting fixing rod (53), the first L-shaped support (51) and the second L-shaped support (52) are fixedly installed through fixing nuts (531), and the connecting fixing rod (53) is welded with the H-shaped steel (4).

6. The cantilever type combined support for the deep-dug foundation pit is applied to the cantilever type combined support according to claim 4, and is characterized in that: the correcting mechanism (54) comprises an upper rotating handle (541), a lower supporting leg (542) and a screw (543), the upper rotating handle (541) and the lower supporting leg (542) are fixedly connected through the screw (543), the screw (543) spirally penetrates through the interiors of the first L-shaped support (51) and the second L-shaped support (52), and meanwhile the screw (543) and the connecting fixing rod (53) are perpendicularly arranged.