TWM615460U - High load-bearing structure of continuous wall guide trench - Google Patents

Abstract

A high-load bearing structure of a continuous wall guide trench, which comprises: mixed pile groups arranged on both sides or one side of the guide trench, a plurality of piles extending in a straight line, and a plurality of fixing members. The mixed pile is formed by mixing cement paste and soil. The pile materials and the mixed piles are arranged in a one-to-one correspondence. The pile material is inserted from the center of the corresponding mixed pile, and its insertion depth is not less than the depth of the mixed pile. The two ends of the fixing member are respectively fixed to the protruding parts of any two adjacent piles on the same side of the guide groove. Then the mixed pile groups on the same side of the guide trench are combined into one body, so that the mixed pile groups will not be relatively displaced (sinked). Then there is sufficient bearing capacity on both sides of the guide groove.

Description

High load-bearing structure of continuous wall guide trench

This creation relates to a high-bearing structure of continuous wall guide ditch, which mainly fixes the pile materials inserted into each cement slurry and soil mixed pile to form a connected mixed pile group to improve the bearing capacity of the guide ditch.

At present, most of the underground foundation constructions of high-rise buildings or structures (such as MRT, subway, etc.) are constructed by continuous wall construction method. To carry out continuous wall construction, it is necessary to construct a "guide ditch" first. In the metropolitan area, among the sources of construction land, there are fewer and fewer original civil constructions. Most of the newly built land is rebuilt after the old buildings are demolished, causing the problem of backfilling the old foundations of the buildings. The construction sites for such urban renewal and the reconstruction of old and dangerous buildings will have the problem of weak soil quality. When excavating the guide trench, if there are backfills, garbage, old foundations, old pipelines, etc. from the original demolished building, it will inevitably produce "over-excavation collapse space" beyond the expected "excavation width".

If the original geology is weak, and heavy machinery is required for the construction of the continuous wall, and the earthquake-like phenomenon produced by the heavy machinery operation will have the effect of liquefying the soil. Grabbing and digging during the construction of the continuous wall is an "underwater operation", and it is necessary to do the digging operation in the water with stabilizing liquid. The up and down impact disturbance during the excavation operation results in the high water content of the soil backfilled due to the "over-excavated collapse space", which causes the soil to flow and liquefy, and the soil loses its compaction and cohesive force and loses the required bearing capacity of the building. After the load and vibration of the construction machinery on the side of the guide ditch, both sides of the guide ditch and the excavated The wall of the continuous wall in the depth has collapsed, causing the continuous wall to fail and catastrophically, and even cause the road surface to sink, damage the neighboring houses, and cause "industrial safety incidents."

The conventional method of geological improvement and neighboring house protection requires that the geological improvement is drilled to the required depth by rotating the drill pipe, and then high-pressure cement mixing slurry is injected from the pipe in the drill pipe. Rotate the drill pipe to make the cement slurry and the surrounding backfill and weakly mix and cement, so as to control the proper pressure of the cement slurry and the speed and elevation of the drill pipe to form a cylindrical pile or a whole to change the original situation. Geology, to achieve the functional benefits required by the project.

Hajime is carrying out geological improvement and neighboring house protection methods. Adjacent house protection first stake out the position of the neighboring house to determine the location. Next, position the drilling machine and perform drilling. After the drilling is completed, grouting is carried out so that the cement slurry is mixed with the surrounding backfill soil and weakly mixed and cemented to form a cement slurry and soil mixed pile. To carry out overall geological improvement is to drill all the integral foundation parts. After the drilling is completed, grouting is carried out so that the cement slurry is weakly mixed and cemented with the surrounding area.

The main purpose of this creation is to provide a high load-bearing structure of a continuous wall guide trench, which can improve the load-bearing capacity of the guide trench, and can carry heavy equipment, and the guide trench is not easy to collapse when the guide trench or continuous wall is excavated.

The high load-bearing structure of the continuous wall guide trench provided by this creation is a mixed pile group set on both sides or one side of the guide trench. Each of the mixed piles is formed by mixing cement slurry and soil. Wherein, the center of each mixed pile is inserted with a pile material extending in a straight line from top to bottom. The upper end of the pile material is protruding from the ground. The upper ends of the two adjacent piles on the same side of the guide trench are fixed and supported integrally by a fixing piece. The fixing member is a steel bar or an angle iron bar.

The pile material is one of H-shaped steel, L-shaped steel, C-shaped steel, I-shaped steel, metal pipe, and plastic pipe. The height of the pile protruding from the ground is 10-15 cm.

The fixing member and the corresponding piles are fixed by welding.

10: Guide groove

11: Stakeout

12: Mixed pile

20: pile material

21: Guide trench wall

30: Stratum

40: Fixing parts

Figure 1 is a schematic diagram of the appearance of the authoring embodiment.

Figure 2 is a schematic diagram of an embodiment of setting out the position of the guide trench drilling.

Figure 3 is the first schematic diagram of the embodiment of the two mixed pile groups in the guide trench.

Figure 4 is the second schematic diagram of the embodiment of the two mixed pile groups in the guide trench.

Figure 5 is a schematic diagram of setting up mixed piles in weak geology.

Figure 6 is a schematic diagram of inserting the pile material in the center of the mixed pile.

The so-called weak soil quality may be the original civil construction land with insufficient bearing capacity, or the non-original construction land with backfilling soil, or the waste non-original construction land with the demolition of old buildings and backfilling. None of the three can meet the requirements of the building. The bearing capacity. The high load-bearing structure of the continuous wall guide ditch disclosed in this creation is mainly aimed at the construction of weak soil and solves the problem of insufficient bearing capacity of the guide ditch.

Please refer to Figure 1. The high load-bearing structure of the continuous wall guide trench disclosed in this creation includes: a mixed pile group 12 set on both sides or one side of the guide trench, a plurality of piles 20 extending in a straight line, and a plurality of solid接件40. The piles 20 and the mixed piles 12 are arranged in a one-to-one correspondence. The pile material 20 is inserted from the center of the corresponding mixed pile 12, and the insertion depth is not less than the depth of the mixed pile 12. The upper end of the pile material 20 is protruding from the ground, and the height of the pile 20 protruding from the ground is preferably 10-15 cm. Two ends of the fixing member 40 are respectively fixed to the protruding parts of any two adjacent piles 20 on the same side of the guide groove 10.

The preliminary work of this creation is to set the position of each pile in the pile row around the guide trench 10, and stake out 11, as shown in Figure 2. Next, drill the pile site. After the drilling is completed, grouting is performed to let the cement slurry and the surrounding backfill soil and weakly mix and cement to form a cement slurry and soil mixed pile 12, as shown in Figure 2. According to the soft soil with different degrees of weakness, different rows of piles can be set. For mildly weak soil, the setting of drilling position is suitable for single-row pile arrangement, as shown in Figure 1. For moderately weak soil, the setting of the drilling position is suitable for double-row piles staggered arrangement; for the severely weak soil, the setting of the drilling position is suitable for multi-row piles staggered arrangement, as shown in Figure 3.

In practice, every time a hybrid pile 12 is completed, after the drill rod is pulled out, the pile material 20 is inserted into the borehole. When the pile material 20 is inserted, if it cannot reach the expected depth, it can be forced into the stratum 30 to the preset depth with on-site equipment. The field equipment may be an excavator.

Each pile material 20 is fixedly connected to the corresponding mixed pile 12. The piles 20 are connected into one body by the fixing members 40. Then, the mixed piles 12 on the same side of the guide trench 10 can be combined into one body, so that any one of the mixed piles 12 in the group of mixed piles 12 will not be relatively displaced (sinked). Then there is sufficient bearing capacity on both sides of the guide groove 10. At the same time, when the continuous wall is excavated, the collapse of the excavation trench is not easy to occur.

The pile material 20 can use H-shaped steel, L-shaped steel, C-shaped steel, I-shaped steel, metal pipe, and plastic pipe. In this embodiment, the pile material 20 is a metal tube. The fixing member 40 may be a steel bar or an angle iron bar. When the pile material 20 is a metal pile material 20, the two ends of the fixing member 40 can be welded to the exposed part of the top end of the pile material 20. After the continuous wall unit is manufactured, the piles 20 can be pulled out for recycling, and used in the load-bearing structure of the guide trench 10 of another continuous wall unit.

In summary, the high load-bearing structure of the continuous wall guide trench provided by this creation is to insert a pile material 20 in the center of the traditionally used mixed pile 12, and rely on the mutual fixation of the tops of the pile materials 20 to make each mixed The piles 12 are combined into one body, so that the load-bearing capacity of the guide trench 10 is improved. Then in When constructing a guide trench or digging a continuous wall trench, it is unlikely that the guide trench 10 will collapse.

Although this creation is disclosed in the above implementation mode, it is not used to limit this creation. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of this creation. Therefore, this creation is protected. The scope shall be subject to the scope of the patent application.

10: Guide groove

12: Mixed pile

20: pile material

40: Fixing parts

Claims (6)

A high-load bearing structure of a continuous wall guide trench, comprising: a plurality of mixed piles, a plurality of linearly extending piles, and a plurality of fixing members arranged on both sides or one side of the guide trench; the piles There is a one-to-one correspondence with the mixed piles; the mixed piles are made by mixing cement slurry and soil; each pile material is inserted into the center of the corresponding mixed pile from top to bottom, and the upper end of the pile material is protruding Ground-like; the upper ends of any two adjacent piles on the same side of the guide ditch are overlapped and fixed by the fixing member, so that the piles on the same side of the guide ditch are fixed and integrated. For the high-load-bearing structure of the continuous wall guide trench described in item 1 of the scope of patent application, the height of the pile material protruding from the ground is 10-15 cm. For the high-load-bearing structure of the continuous wall guide trench described in item 1 of the scope of patent application, the pile material is one of H-shaped steel, L-shaped steel, C-shaped steel, I-shaped steel, metal pipe, and plastic pipe. For the high-load-bearing structure of the continuous wall guide trench described in item 1 of the scope of patent application, the fixing member is one of a steel bar and an angle iron bar. As described in item 4 of the scope of patent application, the continuous wall guide trench high-load bearing structure, wherein the two ends of the fixing member and the corresponding two piles are fixed by welding. For the high-bearing structure of the continuous wall guide trench described in item 1 of the scope of patent application, the depth of the insertion of the pile material is not less than the depth of the corresponding mixed pile.

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