A construction elevator foundation and construction method thereof

Abstract

The present invention discloses a construction elevator foundation and a construction method thereof, including a foundation trench or a basement post-casting strip around the outer side of the basement outer wall of a building structure and a construction elevator, the construction elevator being arranged on the outer side of the basement outer wall of the building structure, the construction elevator being located on a steel structure foundation arranged above the foundation trench or the basement post-casting strip, the steel structure foundation comprising a support beam, the support beam being arranged on the hardened natural floor across the foundation trench on the outer side of the basement outer wall of the building structure, or across the basement top plate across the basement post-casting strip, spanning the basement outer wall of the building structure and the support beam, fixing multiple steel foundation main beams at intervals and in parallel, and intersecting multiple steel foundation secondary beams at a 90-degree angle with the steel foundation main beam. By using a steel structure foundation, it can be spanned over the foundation trench or the post-casting strip, without the need to set a concrete structure foundation in the foundation trench or the post-casting strip, avoiding the need to be dismantled after use and being unable to be reused, and satisfying the normal construction process interleaving.

Description

Technical Field

[0001] The invention belongs to the field of construction and relates to a construction elevator foundation and a construction method thereof. Background Art

[0002] In today's construction, construction elevators have become commonly used vertical transportation equipment in construction. Construction elevators are arranged at the post-cast zone or backfill position of the basement of a group of buildings.

[0003] The quality of the foundation pit backfill soil is difficult to guarantee; the post-casting belt is generally a settlement post-casting belt, and the casting time of the post-casting belt is 28 days after the capping of the structures on both sides, which cannot meet the normal construction process interspersed; the backfill soil part cannot be backfilled due to the influence of the construction process, the construction unit, and the amount of backfill soil, resulting in the inability to normally intersperse the construction process. This restricts the time for inserting other sub-projects such as secondary structures and decoration, and seriously affects the production progress.

[0004] At present, the common method of arranging construction elevators is to arrange them on backfill soil or on the top plate of the basement. If they are arranged in backfill soil, uneven settlement of the foundation of the construction elevator may occur due to the quality of the backfill soil and the load of the construction elevator, causing engineering accidents; when they are arranged on the top plate of the basement, the load of the construction elevator may cause cracks in the structure of the top plate of the basement, resulting in quality accidents. In addition, the foundation of the construction elevator is generally made of reinforced concrete structure, which cannot be reused after being used once, and the cost is relatively high. Summary of the invention

[0005] The purpose of the present invention is to provide a construction elevator foundation and a construction method thereof. The structure is simple and the construction is convenient. The use of a steel structure foundation does not require the installation of a concrete structure foundation in the foundation trench or post-casting zone.

[0006] After use, it can be recycled to save costs.

[0007] In order to achieve the above object, the technical solution of the present invention is:

[0008] A construction elevator foundation includes a foundation trench or a basement post-cast strip surrounding the outer side of an outer wall of a basement of a building structure and a construction elevator. The construction elevator is arranged on the outer side of the outer wall of the basement of the building structure. The construction elevator includes an elevator derrick and a hoist cage shaft and a counterweight shaft respectively arranged on both sides of the elevator derrick, wherein the construction elevator is located on a steel structure foundation arranged above the foundation trench or the basement post-cast strip. The steel structure foundation includes a support beam, which is arranged on a hardened natural floor across the foundation trench on the outer side of the basement of the building structure, or on a basement top plate across the basement post-cast strip. The steel structure foundation also includes a plurality of steel foundation main beams, which span the outer wall of the basement of the building structure and the support beams, are spaced apart from each other, are parallel to the outer wall of the basement and are connected and fixed, and a plurality of steel foundation secondary beams are arranged at a 90-degree angle to cross the steel foundation main beams. The construction elevator is located and fixed on a steel platform formed by the steel foundation main beams and the steel foundation secondary beams.

[0009] The solution is further as follows: a slope reinforcement is established between the foundation trench and the hardened natural floor, and the support beam is a concrete support beam, which is at least 1.5 m away from the upper edge of the slope reinforcement.

[0010] The plan further provides that the plurality of steel foundation secondary beams include steel foundation secondary beams for building a floor-mounted transport and material receiving platform frame and steel foundation secondary beams for supporting a construction elevator.

[0011] The plan is further as follows: there are four steel foundation main beams, the elevator derrick fixed seat is on multiple steel foundation secondary beams arranged between the two middle steel foundation main beams, the multiple steel foundation secondary beams extend through the two middle steel foundation main beams and are respectively connected to the two outer steel foundation main beams, and the cage shaft and counterweight shaft are respectively fixed on the middle steel foundation main beam and the steel foundation secondary beam.

[0012] The solution is further that the elevator derrick, cage shaft and counterweight shaft are fixedly connected to the steel foundation main beam or the steel foundation secondary beam by means of U-bolts that wrap around the steel foundation main beam or the steel foundation secondary beam.

[0013] A further solution is that the U-bolts are cross-hooked on the main beam of the steel foundation or the secondary beam of the steel foundation and are diagonally connected and fixed to the elevator derrick, the cage shaft and the counterweight shaft.

[0014] A construction method based on the foundation of the construction elevator. If it is a foundation trench, first, cross the foundation trench and select a location to cast a concrete support beam on the hardened natural floor. If it is a basement post-cast strip, cross the basement post-cast strip and select the basement top plate, and make a support beam on the top plate. The upper end surface of the concrete support beam is flush with the end surface of the basement outer wall of the building structure. If it is a foundation trench, a solid slope with a slope of no more than 45 degrees is established between the foundation trench and the hardened natural floor with concrete mortar, and the cast concrete support beam is at least 1.5m away from the upper edge of the solid slope. If it is a basement post-cast strip, position steel bars are driven into the selected basement top plate, and the concrete support beam is cast by formwork. Then, a steel foundation main beam and a steel foundation secondary beam are laid. The steel foundation main beam is fixedly connected to the basement outer wall and the concrete support beam of the building structure respectively by expansion bolts. The foundation secondary beam is connected in sections between the steel main beams by bolts or welding and is flush with the upper end surface of the steel main beam. Then, rust removal and rust prevention treatment are performed and the construction elevator is installed.

[0015] The plan is further as follows: there are four steel foundation main beams, the elevator derrick fixed connection seat is on multiple steel foundation secondary beams arranged between the two middle steel foundation main beams, multiple steel foundation secondary beams extend through the two middle steel foundation main beams and are respectively connected to the two outer steel foundation main beams, and the cage shaft and counterweight shaft are respectively fixedly connected on the middle steel foundation main beam and the steel foundation secondary beam.

[0016] The plan is further as follows: the elevator derrick, the cage shaft and the counterweight shaft are fixedly connected to the steel foundation main beam or the steel foundation secondary beam, respectively, by means of U-bolts that cover the steel foundation main beam or the steel foundation secondary beam.

[0017] The solution is further that the U-bolts are cross-hooked on the main steel foundation beam or the secondary steel foundation beam to be diagonally connected and fixed to the elevator derrick, the cage shaft and the counterweight shaft.

[0018] The beneficial effects of the present invention are: the structure is simple. The present invention can be straddled above the foundation trench or the post-cast strip by using a steel structure foundation. A lift is built before the construction of the foundation trench or the post-cast strip, creating favorable conditions for the insertion of later construction processes. There is no need to set a concrete structure foundation in the foundation trench or the post-cast strip, avoiding the need to dismantle and reuse after use, meeting the normal construction process interlacing, and can be circulated and used again after use, saving costs.

[0019] The present invention is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the foundation cross-section structure of the basement structure of the present invention, in which the outer side of the basement outer wall is the foundation trench;

[0021] Figure 2It is a schematic diagram of the foundation cross-section structure of the basement exterior wall of the present invention with a post-cast strip on the outside;

[0022] Figure 3 It is a schematic diagram of the basic plane structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the U-bolt fixing structure of the elevator derrick of the present invention. DETAILED DESCRIPTION

[0024] Embodiment 1:

[0025] A construction hoist foundation, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the construction elevator foundation includes a foundation trench 2 around the outer side of the basement outer wall 1 of the building structure or a post-cast strip 901 of the basement 9 and a construction elevator 3. The construction elevator 3 is arranged on the outer side of the basement outer wall 1 of the building structure for up and down construction. The construction elevator 3 includes an elevator derrick 301 and a hoist cage shaft 302 and a counterweight shaft 303 respectively arranged on both sides of the elevator derrick, wherein the construction elevator is located on a steel structure foundation arranged above the foundation trench or the post-cast strip. The steel structure foundation includes a support beam 4, which is arranged on the hardened natural floor 5 across the foundation trench on the outer side of the basement outer wall of the building structure, or on the basement top plate 902 across the basement post-cast strip 901. If there is no support column at the lower end of the basement top plate 902 of the basement post-cast strip where the support beam 4 is arranged, it is necessary to temporarily set a reinforced support 903. The support beams arranged on the hardened natural floor 5 are concrete support beams, in which steel bars are embedded. The support beams on the basement top plate 802 can be either steel support beams or concrete support beams. A plurality of steel foundation main beams 6 are fixed at intervals and in parallel across the building structure basement outer wall 1 and the soil support beams 4. The plurality of steel foundation main beams are connected and fixed to the basement outer wall and the support beams. A plurality of steel foundation secondary beams 7 are arranged at a 90-degree angle to cross the steel foundation main beams. The steel foundation main beams 6 extend into the building structure basement outer wall to a depth G of at least 300 mm. The construction elevator is located on and fixed on a steel platform formed by the steel foundation main beams and the steel foundation secondary beams. Two ground-to-ground transport material receiving platform frame foundation I-beams 10 are arranged at intervals on the steel foundation main beams 6 between the construction elevator and the basement outer wall as steel foundation secondary beams, which are used to set up the ground-to-ground transport material receiving platform frame. Moreover, the I-beams can be simplified according to the construction conditions.

[0026] Among them: as a foundation trench, in order to prevent collapse, a slope 201 with a slope not greater than 45 degrees a is established between the foundation trench or the post-cast strip and the hardened natural floor using concrete mortar, the thickness of the mortar is not less than 50 mm, and the distance D between the concrete support beam and the upper edge of the slope is at least 1.5 m.

[0027] The steel foundation main beam 6 and the steel foundation secondary beam 7 in the embodiment are two I-beams of different specifications. Multiple steel foundation secondary beams 7 are connected in sections between the steel foundation main beams by bolts or welding and are flush with the upper end surfaces of the steel foundation main beams. The multiple steel foundation secondary beams include a steel foundation secondary beam for building a ground-mounted transport and material receiving platform frame and a steel foundation secondary beam for supporting the construction elevator, which is arranged on the steel foundation main beam between the construction elevator and the outer wall of the basement of the building structure.

[0028] In this embodiment: there are four steel foundation main beams, and the elevator derrick fixing seat is on three steel foundation secondary beams arranged between the two middle steel foundation main beams. The three steel foundation secondary beams extend through the two middle steel foundation main beams and are respectively connected to the two outer steel foundation main beams. The cage shaft and the counterweight shaft are respectively fixedly connected on the middle steel foundation main beam and the steel foundation secondary beam.

[0029] In the embodiment: the fixed connection between the elevator derrick, the cage shaft and the counterweight shaft and the steel foundation main beam or the steel foundation secondary beam is respectively fixedly connected by U-bolts sleeved around the steel foundation main beam or the steel foundation secondary beam. The U-bolts are cross-sleeved around the steel foundation main beam or the steel foundation secondary beam and are diagonally connected and fixed to the elevator derrick, the cage shaft and the counterweight shaft. This connection structure prevents the U-bolts from slipping off. Figure 4 The connection structure of the elevator derrick is illustrated by way of example. The U-bolts 8 are diagonally sleeved around the steel foundation secondary beam at the lower side of the elevator derrick to connect and fix the elevator derrick. The cage shaft and the counterweight shaft are fixed in the same way.

[0030] Embodiment 2:

[0031] A construction method for the foundation of a construction elevator based on Example 1. The content of Example 1 should be applicable to this embodiment. In two cases, if it is a foundation trench, first, cross the foundation trench and select a location on the hardened natural floor to make a support beam. If it is a basement post-cast strip, cross the basement post-cast strip and select the basement top plate, and make a support beam on the top plate. The upper end surface of the support beam is flush with the end surface of the outer wall of the basement of the building structure. Among them, if it is a foundation trench, a slope with a slope of no more than 45 degrees is established between the foundation trench and the hardened natural floor with concrete mortar, and the thickness of the slope fixing mortar is not less than 50m m, the cast concrete support beam is at least 1.5m away from the upper edge of the solid slope. If it is a basement post-cast strip, drive positioning steel bars into the selected basement top plate, support the formwork and cast the concrete support beam, then lay the steel foundation main beam and steel foundation secondary beam on the building structure basement outer wall and the concrete support beam, the steel foundation main beam is fixedly connected to the building structure basement outer wall and the concrete support beam respectively through expansion bolts, the foundation secondary beam is connected between the steel main beams by bolts or welding in sections and is flush with the upper end surface of the steel main beam, and then the construction elevator is installed after rust removal and rust prevention treatment.

[0032] The same as Example 1: There are four steel foundation main beams, and the fixed connection seat of the elevator derrick is on multiple steel foundation secondary beams arranged between the two middle steel foundation main beams. Multiple steel foundation secondary beams extend across the two middle steel foundation main beams and are respectively connected to the two outer steel foundation main beams. The cage shaft and the counterweight shaft are respectively fixedly connected on the middle steel foundation main beam and the steel foundation secondary beam. The elevator derrick, the cage shaft, and the counterweight shaft are fixedly connected to the steel foundation main beam or the steel foundation secondary beam, respectively, by U-bolts that are sleeved around the steel foundation main beam or the steel foundation secondary beam. The U-bolts are cross-sleeved around the steel foundation main beam or the steel foundation secondary beam to be diagonally connected and fixed to the elevator derrick, the cage shaft, and the counterweight shaft.

[0033] The above embodiment can build a lift before the foundation trench or post-casting belt construction, creating favorable conditions for the insertion of later construction processes, and can complete the construction nodes on time while ensuring construction quality and construction safety. The basic steel structure can be used in a revolving manner, saving materials and reducing construction costs for each project.

Claims

1. A construction elevator foundation, comprising a foundation trench or a basement post-cast strip surrounding the outer side of the basement outer wall of a building structure and a construction elevator, the construction elevator being arranged on the outer side of the basement outer wall of the building structure, the construction elevator comprising an elevator derrick and a hoist cage shaft and a counterweight shaft respectively arranged on both sides of the elevator derrick, characterized in that: The construction elevator is located on a steel structure foundation set above the foundation pit or the basement post-cast zone. The steel structure foundation includes a support beam, which is set on the hardened natural floor across the foundation pit outside the basement outer wall of the building structure, or across the basement top plate across the basement post-cast zone. The steel structure foundation also includes a plurality of steel foundation main beams, which span the basement outer wall and the support beam of the building structure and are connected and fixed to the basement outer wall and the support beam in parallel with each other. A plurality of steel foundation secondary beams are arranged at a 90-degree angle to the steel foundation main beam. The construction elevator is located and fixed on a steel platform formed by the steel foundation main beam and the steel foundation secondary beam. There are four beams, and the elevator derrick is fixed on a plurality of steel foundation secondary beams arranged between the two middle steel foundation main beams. The plurality of steel foundation secondary beams extend through the two middle steel foundation main beams and are respectively connected to the two outer steel foundation main beams. The cage shaft and the counterweight shaft are respectively fixed on the middle steel foundation main beam and the steel foundation secondary beam. The elevator derrick, the cage shaft and the counterweight shaft are fixedly connected to the steel foundation main beam or the steel foundation secondary beam by U-bolts that cover the plurality of steel foundation secondary beams. The U-bolts are cross-covered and cover the plurality of steel foundation secondary beams to be diagonally connected and fixed to the elevator derrick, the cage shaft and the counterweight shaft.

2. The construction hoist foundation according to claim 1, characterized in that: A slope reinforcement is established between the foundation trench and the hardened natural floor, and the support beam is a concrete support beam, which is at least 1.5 m away from the upper edge of the slope reinforcement.

3. The construction hoist foundation according to claim 1, characterized in that: The multiple steel foundation secondary beams include steel foundation secondary beams for building a ground-mounted transport and material receiving platform frame and steel foundation secondary beams for supporting a construction elevator.

4. A construction method based on the construction elevator foundation of claim 1, if it is a foundation trench, first cross the foundation trench and select a location on the hardened natural floor to make a support beam, if it is a basement post-cast strip, cross the basement post-cast strip to select the basement top plate, and make a support beam on the top plate, the upper end surface of the support beam is flush with the end surface of the basement outer wall of the building structure, characterized in that, If it is a foundation pit, use concrete mortar to build a slope between the foundation pit and the hardened natural floor. The support beam is at least 1.5m away from the upper edge of the slope. If it is a basement post-cast joint, drive positioning steel bars into the selected basement top plate, support the formwork and cast the concrete support beam, and then lay the steel foundation main beam and steel foundation secondary beam. The steel foundation main beam is fixedly connected to the outer wall of the building structure basement and the support beam by expansion bolts respectively. The steel foundation secondary beam is connected in sections between the steel main beams by bolts or welding to be flush with the upper end surface of the steel main beam. After rust removal and rust prevention treatment, the construction elevator is installed.

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